Stratosphere observatory for infrared astronomy.
An aluminum three-row wire-race roller bearing with a bolted steel gear ring for the rough adjustment of the telescope was applied. The telescope is in the rear of a converted Boeing 747.During the flight, a sort of “sliding roof” opens to enable the telescope to make astronomic observations in the infrared range.
Optical telescopes
Three-row wire-race roller bearing was designed for telescopes. The bearing rings are made of aluminium.The bearings enable the adjustment of the M2 mirror.In addition,a surface-hardened three-row precision bearing was supplied to adjust the M3 mirror.Astronomic faculties use these telescopes for their extensive research.
Articulated buses
Hybrid-type four-point bearing was manufactured for the articulation of buses, consisting of a wire race bearing part and a surface-hardened part.The majority of the articulated buses are referred to as pushers, i.e. the engine and entire drive unit are located in the rear section, in the trailer.This concept puts a lot of specific requirements on the articulation, such as buckling stability, for instance, which is achieved by means of a complicated electronically-controlled damping system.
2014年11月18日星期二
UWE Wire-race Bearing Components
Wire races:Hardened or naturally hardened steels
Rolling elements:Bearing steel, also corrosion-resistant
Bearing rings:aluminium
Surface: corrosion-proof
• Steel normalized or hardened and tempered
Surface: corrosion-proof
• Stainless steel, selection as required(e.g. acid-resistant steels)
• Special steels, selection as required(e.g. magnetoresistive steels)
• Bronze(e.g. seawater-resistant bronze)
Rolling elements
• Bearing steel, also corrosion-resistant
Gear rings
• The material can be selected as for the bearing rings.
• The gearing cut into the ring can be hardened.
Material combinations
• Material combinations in one bearing are also possible (e.g. rings of aluminium and gear ring of hardened and tempered steel).
Design and dimensioning
Rolling elements:Bearing steel, also corrosion-resistant
Bearing rings:aluminium
Surface: corrosion-proof
• Steel normalized or hardened and tempered
Surface: corrosion-proof
• Stainless steel, selection as required(e.g. acid-resistant steels)
• Special steels, selection as required(e.g. magnetoresistive steels)
• Bronze(e.g. seawater-resistant bronze)
Rolling elements
• Bearing steel, also corrosion-resistant
Gear rings
• The material can be selected as for the bearing rings.
• The gearing cut into the ring can be hardened.
Material combinations
• Material combinations in one bearing are also possible (e.g. rings of aluminium and gear ring of hardened and tempered steel).
Design and dimensioning
Wire-race bearing special designs
There are few special types for UWE wire-race bearing
Four-row wire-race roller bearing
Particularly designed to transmit loads due to the different expansion behaviour of the outer and inner companion structure or to prevent radial clearance in this context.
Hybrid-type three-row wire-race roller bearing
The raceways of the outer ring are surface hardened, the raceways of the inner rings have a wire filling. Particularly designed to compensate raceway tilts due to the expansion of the inner companion structure.
Hybrid-type four-point wire-race ball bearing
The raceways of the inner ring are surface hardened, the raceways of the outer ring have a wire filling. Particularly designed to enable the necessary cast design to act at the same time as outer ring.
Four-point wire-race ball bearing
With integrated 4-way slip ring and retaining ring with spring suspension system. Particularly designed for the transmission of electric current and limitation of the frictional torque in case of a major deformation of the companion structure. Furthermore equipped with earthing plugs to compensate the potential between the bearing rings.
Three-wire race bearing
With integrated ring motor. Particularly designed to integrate the drive into the bearing.
Segmented wire-race ball bearing
Particularly designed for limited available space.
Four-row wire-race roller bearing
Particularly designed to transmit loads due to the different expansion behaviour of the outer and inner companion structure or to prevent radial clearance in this context.
Hybrid-type three-row wire-race roller bearing
The raceways of the outer ring are surface hardened, the raceways of the inner rings have a wire filling. Particularly designed to compensate raceway tilts due to the expansion of the inner companion structure.
Hybrid-type four-point wire-race ball bearing
The raceways of the inner ring are surface hardened, the raceways of the outer ring have a wire filling. Particularly designed to enable the necessary cast design to act at the same time as outer ring.
Four-point wire-race ball bearing
With integrated 4-way slip ring and retaining ring with spring suspension system. Particularly designed for the transmission of electric current and limitation of the frictional torque in case of a major deformation of the companion structure. Furthermore equipped with earthing plugs to compensate the potential between the bearing rings.
Three-wire race bearing
With integrated ring motor. Particularly designed to integrate the drive into the bearing.
Segmented wire-race ball bearing
Particularly designed for limited available space.
ship crane slewing ring
Key Specifications/Special Features of UWE ship slewing rings:
Inner diameter: 600- 4500 mm
Outer diameter: 700 - 5000 mm
Width: 56-300mm
Tooth processing module:M7-M25
Gear machining accuracy:<0.1
Max. Tapping diameter:M60
Gear optition: extenal gears,internal gears,no gears
Rolling element: ball or rollers
Rolling element material: Chrome steel GCr15 or GCr15SiMn
Ring Material: 42CrMo, 50Mn, steel 45#
Seal: NBR
Normalizing hardness: 187HB-241HB
Quench & temper hardness: 229HB-269HB
Raceway hardness after quenching: 55HRC-62HRC
Sevice:OEM Service Offered/Design Service Offered/Buyer Label Offered
Inner diameter: 600- 4500 mm
Outer diameter: 700 - 5000 mm
Width: 56-300mm
Tooth processing module:M7-M25
Gear machining accuracy:<0.1
Max. Tapping diameter:M60
Gear optition: extenal gears,internal gears,no gears
Rolling element: ball or rollers
Rolling element material: Chrome steel GCr15 or GCr15SiMn
Ring Material: 42CrMo, 50Mn, steel 45#
Seal: NBR
Normalizing hardness: 187HB-241HB
Quench & temper hardness: 229HB-269HB
Raceway hardness after quenching: 55HRC-62HRC
Sevice:OEM Service Offered/Design Service Offered/Buyer Label Offered
UWE ship crane slewing ring includes double row ball slewing ring, four-point contact ball slewing ring and three row roller slewing ring.Large size three row roller slewing ring is often selected for heavy duty deck crane, four-point contact ball or double row ball slewing ring are often selected for light duty deck cranes.Large shipboard crane with a three row roller slewing ring. The high load capacity and compact proportions of this type of slewing ring are ideally matched to the mast and base block proportions of the crane.Deep sea fishing vessels use ball slewing rings for shipboard cranes and net handling equipment.
UWE slewing rings are widely used in kinds of cranes, such as tower cranes, ship deck cranes, mobile cranes, railway cranes and so on.
UWE slewing rings are widely used in kinds of cranes, such as tower cranes, ship deck cranes, mobile cranes, railway cranes and so on.
2014年11月17日星期一
Yaw and Pitch Rolling Bearing Design Types
Modern wind turbines use large slewing rings at the root of each blade to enable pitch angle changes and thus aerodynamic performance and load control. Yaw bearings are used for angular realignment of the nacelle into the predominant wind direction. These applications require long periods in nearly stationary positions with large stochastic loads. Due to this demanding load environment and the fact that bearings exist in the critical load path, their design becomes critical to the safety and reliability of most turbine designs.
Large wind turbines (those rated at more than 250 kW) use ball or roller bearings with special configurations for blade retention pitch bearing and yaw bearing locations. The bearings consist of two ring-rolled forgings forming the outer and inner raceways and a complement of either balls or rollers. The inner and outer continuous-ring forgings have mounting holes that allow the bearing to be bolted directly to the supporting structures. The balls or rollers are inserted into the bearing through a radial cylindrical hole in one of the rings. The hole then is closed using a removable loading plug con-toured to the ball path or roller path surface.
It is common practice to cut a spur gear integral with one of the bearing rings, especially for the yaw bearing application. Individual plastic spacers or thin section cage arc segments are used to separate the balls. The spacers are cylindrical with a hemispherical end. The individual rollers in the cross-roller bearing are separated by plastic, saddle-shaped spacers. The rollers in the cross-roller bearing alternate in their orientation to carry load.
The inner and outer rings are hardened from 250 to 300 Brinell hardness (HB). This is referred to as the “core hardness” of the ring. This core hardness should provide adequate core yield and fatigue strength, yet remain at a hardness low enough to facilitate machining of the rings, gear teeth, and mounting-bolt holes. The actual ball or roller path (rolling contact surface) is induction heated, quenched, and tempered to provide a hard surface or “case.” The surface hardness of the raceway is a minimum of 58 HRC (Rockwell C scale hardness). The depth of the hardened case is defined as the depth to a hardness of 50 HRC.
The two-row, eight-point contact ball bearing type is more costly to manufacture than the single-row, four-point contact ball bearing. In addition to having a second row of balls and separators, the two-row bearing must be repeatedly assembled and disassembled during manufacture to accurately measure and match the internal diametral clearance or preload of the two ball rows.
The main advantages of the eight-point contact ball bearing, as compared to the four-point contact ball bearing, are:
• Lower ball loads;
• Lower Hertz stresses;
• Less required case depth; and
• Increased fatigue life.
Large wind turbines (those rated at more than 250 kW) use ball or roller bearings with special configurations for blade retention pitch bearing and yaw bearing locations. The bearings consist of two ring-rolled forgings forming the outer and inner raceways and a complement of either balls or rollers. The inner and outer continuous-ring forgings have mounting holes that allow the bearing to be bolted directly to the supporting structures. The balls or rollers are inserted into the bearing through a radial cylindrical hole in one of the rings. The hole then is closed using a removable loading plug con-toured to the ball path or roller path surface.
It is common practice to cut a spur gear integral with one of the bearing rings, especially for the yaw bearing application. Individual plastic spacers or thin section cage arc segments are used to separate the balls. The spacers are cylindrical with a hemispherical end. The individual rollers in the cross-roller bearing are separated by plastic, saddle-shaped spacers. The rollers in the cross-roller bearing alternate in their orientation to carry load.
The inner and outer rings are hardened from 250 to 300 Brinell hardness (HB). This is referred to as the “core hardness” of the ring. This core hardness should provide adequate core yield and fatigue strength, yet remain at a hardness low enough to facilitate machining of the rings, gear teeth, and mounting-bolt holes. The actual ball or roller path (rolling contact surface) is induction heated, quenched, and tempered to provide a hard surface or “case.” The surface hardness of the raceway is a minimum of 58 HRC (Rockwell C scale hardness). The depth of the hardened case is defined as the depth to a hardness of 50 HRC.
The two-row, eight-point contact ball bearing type is more costly to manufacture than the single-row, four-point contact ball bearing. In addition to having a second row of balls and separators, the two-row bearing must be repeatedly assembled and disassembled during manufacture to accurately measure and match the internal diametral clearance or preload of the two ball rows.
The main advantages of the eight-point contact ball bearing, as compared to the four-point contact ball bearing, are:
• Lower ball loads;
• Lower Hertz stresses;
• Less required case depth; and
• Increased fatigue life.
Bearing Design Criteria-wind turbine slewing ring
The proper design of a yaw or pitch bearing must satisfy five design criteria and the miscellaneous considerations listed below. Each of the following criterion is addressed in detail in this guide.
1. Bearing fatigue life (rolling contact fatigue)
2. Bearing static capacity
3. Adequate case depth and core hardness
4. Adequate lubrication (surface failure)
5. Friction torque
6. Miscellaneous
A. External bolting
B. Cages or separators
C. Integral seals
The relationships used in the method for determining the basic dynamic capacity in oscillation, life adjustment factors, and equivalent load are supplied in Section 4.
1. Bearing fatigue life (rolling contact fatigue)
2. Bearing static capacity
3. Adequate case depth and core hardness
4. Adequate lubrication (surface failure)
5. Friction torque
6. Miscellaneous
A. External bolting
B. Cages or separators
C. Integral seals
The relationships used in the method for determining the basic dynamic capacity in oscillation, life adjustment factors, and equivalent load are supplied in Section 4.
Effective Lubrication for Wind Power Bearing
A meaningful oil film thickness cannot be generated in a slowly and intermittently moving (oscillating) grease-lubricated yaw or pitch bearing. Therefore a clean grease with good boundary lubrication additives (especially for oscillating conditions) should be selected on the basis of experience for use in wind turbine yaw and pitch bearings. A seal system (integral or external) also is essential for achieving satisfactory operation.
A fretting-corrosion type of raceway and rolling element surface failure commonly is encountered in yaw and pitch bearings. The fretting corrosion appears as elliptical or rectangular footprints at ball or roller spacing in the bearing. The markings are tiny corrosion pits caused by the lubricant being forced out of the contact area (by a small load increase) and then not being able to re-enter the contact zone. The unprotected surface then is subject to corrosion pitting. Most grease rated for oscillation use can coat the rolling contact surfaces and maintain corrosion protection. In extreme cases, coating the raceways is an option. A TDC coating increases the bearing cost significantly but provides increased protection.
One manufacturer of wind turbine yaw and pitch bearings suggests using the Hertz contact stress limits given in Table 16 as means to limit fretting-corrosion types of failures.
A fretting-corrosion type of raceway and rolling element surface failure commonly is encountered in yaw and pitch bearings. The fretting corrosion appears as elliptical or rectangular footprints at ball or roller spacing in the bearing. The markings are tiny corrosion pits caused by the lubricant being forced out of the contact area (by a small load increase) and then not being able to re-enter the contact zone. The unprotected surface then is subject to corrosion pitting. Most grease rated for oscillation use can coat the rolling contact surfaces and maintain corrosion protection. In extreme cases, coating the raceways is an option. A TDC coating increases the bearing cost significantly but provides increased protection.
One manufacturer of wind turbine yaw and pitch bearings suggests using the Hertz contact stress limits given in Table 16 as means to limit fretting-corrosion types of failures.
Wind Power Generator Slewing Ring Cages or Separators
Most yaw and pitch bearings are supplied with plastic spacers between each rolling element. A four-point contact ball bearing has cylindrical spacers with hemispherical indented ends. The cross roller bearing has plastic saddle-type spacers, which conform to the two adjacent rollers with axes of rotation 90 degrees apart. The ball spacers for larger balls (50-mm diameter and larger) often have a steel-plate reinforcement cast into the plastic.
Use of segmented cages is very rare for yaw and pitch bearings. The opening that the cage requires between the raceways significantly reduces the available load-carrying ball path. The bearing manufacturer should be consulted about spacer design. The spacer material also must be compatible with the selected lubricant.
Use of segmented cages is very rare for yaw and pitch bearings. The opening that the cage requires between the raceways significantly reduces the available load-carrying ball path. The bearing manufacturer should be consulted about spacer design. The spacer material also must be compatible with the selected lubricant.
Wind energy Slewing Ring Integral Seals
Wind turbine yaw and pitch bearings are usually supplied with integral rubbing lip seals. The bearing manufacturer should be consulted about materials, design, and placement of the integral seals. The seal material must be compatible with the selected lubricant.
2014年11月2日星期日
Small wind turbines
Small wind turbines may be used for a variety of applications including on- or off-grid residences, telecom towers, offshore platforms, rural schools and clinics, remote monitoring and other purposes that require energy where there is no electric grid, or where the grid is unstable. Small wind turbines may be as small as a fifty-watt generator for boat or caravan use. Hybrid solar and wind powered units are increasingly being used for traffic signage, particularly in rural locations, as they avoid the need to lay long cables from the nearest mains connection point. The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) defines small wind turbines as those smaller than or equal to 100 kilowatts.Small units often have direct drive generators, direct current output, aeroelastic blades, lifetime bearings and use a vane to point into the wind.
UWE bearing provide yaw, blade/pitch bearing and yaw bearing to our customers reliably. UWE wind turbine generator bearing is for 3KW-5MW wind turbine.Each wind turbine generator comprises of one yaw bearing and three pitch bearings, the material of the rolling rings is 42CrMo with quenching and tempering. Raceway surface intermediate frequency induction hardened. Due to complexity of the stress situation, the bearing must bear impact and carry high load. 20 years is a required lifetime for the wind turbine generator, it is also required by yaw bearing and pitch bearings as the mounting cost is too high.
UWE bearing provide yaw, blade/pitch bearing and yaw bearing to our customers reliably. UWE wind turbine generator bearing is for 3KW-5MW wind turbine.Each wind turbine generator comprises of one yaw bearing and three pitch bearings, the material of the rolling rings is 42CrMo with quenching and tempering. Raceway surface intermediate frequency induction hardened. Due to complexity of the stress situation, the bearing must bear impact and carry high load. 20 years is a required lifetime for the wind turbine generator, it is also required by yaw bearing and pitch bearings as the mounting cost is too high.
UWE Slewing Rings for renewable energies
UWE slewing ring has specialized exclusively on supplying system manufacturers in the renewable energy sector.
UWE slewing ring manufacturers of single-row and double-row ball slewing rings used as blade and yaw bearings, as well as for azimuth gear rims to a diameter of 4500 mm.
These are used for onshore and offshore wind turbines in the 100 kW to 7MW range. Roller slewing rings from UWE slewing ring are in use as single main bearings for gear- and shaftless wind turbines.
UWE slewing ring manufacturers of single-row and double-row ball slewing rings used as blade and yaw bearings, as well as for azimuth gear rims to a diameter of 4500 mm.
These are used for onshore and offshore wind turbines in the 100 kW to 7MW range. Roller slewing rings from UWE slewing ring are in use as single main bearings for gear- and shaftless wind turbines.
2014年10月20日星期一
offshore wind,wave and tidal energy
UWE energy from offshore winds, waves, and tides holds great promise for our nation's clean energy future. Energy production is just one of the valuable resources our oceans and coastal ecosystems provide. We can successfully develop offshore renewable energy by ensuring that energy projects are sited, designed, and constructed in a manner that protects our fragile ocean ecosystems.
what is renewable energy?
Renewable energy comes from natural sources that are constantly and sustainably replenished. The technologies featured here will make our families healthier, more secure, and more prosperous by improving our air quality, reducing our reliance on fossil fuels, curbing global warming, adding good jobs to the economy and -- when they're properly sited -- protecting environmental values such as habitat and water quality. Working together, policymakers, communities, businesses, investors, utilities, and farmers can help build a sustainable future for America and the planet.
Email: sales@uwe-bearing.com
Email: sales@uwe-bearing.com
2014年9月26日星期五
Mexico customer visited UWE
Today, Mexico customer Miguel visited UWE bearings.He visited UWE slewing bearing workshop and physico-chemical room. He showed great satisfication with UWE including slewing bearing technology,machining condition,working environment,process machines. We talked and discussed more about the slewing bearing used for wind turbines,water treatment,mining and machinery.
This visit will help us to expend UWE slewing ring business to Mexico, and will help UWE to make own brand famous.
More news of UWE, please visit www.uwe-bearing.com
This visit will help us to expend UWE slewing ring business to Mexico, and will help UWE to make own brand famous.
More news of UWE, please visit www.uwe-bearing.com
2014年9月24日星期三
2014年9月21日星期日
2014年8月15日星期五
aluminium alloy wire-race bearing
Wire raceway slewing bearing, it is a kind of the rolling ring of composite inlay and supporting the production of special structure bearing.Bearing main body material can be some special material: according to the operating conditions such as special aluminum alloy material, special copper and other metals or metal materials. quenching spring wire embedded in the bearing ring to serve as a bearing raceway, has the characteristics of high precision, wear resistance, easy maintenance.
Double row cylindrical roller wire-raceway slewing bearing was deliveried in March 2014, recognised by the height of the foreign users.UWE research and development of steel wire raceway slewing bearing to ensure the bearing strong corrosion resistance, light weight, and is applicable to cold, heat, and many other very dirty environment and to ensure the bearing under the characteristics of high precision operation, carrying capacity, impact resistance, high reliability.
Due to the high contact stress is mainly borne by steel wire, bearing ring (the research and development for monolithic) was ingredients.After damage and bearing steel wire rolling, can be removed to replace, the characteristics of two kinds of greatly reduces the cost of transportation, transportation efficiency, repair costs and downtime work time.
This kind of bearing difficult to design and manufacture, UWE technology belongs to the domestic advanced level, are widely used in light machinery, medical equipment, military field and other special work areas, etc.
Double row cylindrical roller wire-raceway slewing bearing was deliveried in March 2014, recognised by the height of the foreign users.UWE research and development of steel wire raceway slewing bearing to ensure the bearing strong corrosion resistance, light weight, and is applicable to cold, heat, and many other very dirty environment and to ensure the bearing under the characteristics of high precision operation, carrying capacity, impact resistance, high reliability.
Due to the high contact stress is mainly borne by steel wire, bearing ring (the research and development for monolithic) was ingredients.After damage and bearing steel wire rolling, can be removed to replace, the characteristics of two kinds of greatly reduces the cost of transportation, transportation efficiency, repair costs and downtime work time.
This kind of bearing difficult to design and manufacture, UWE technology belongs to the domestic advanced level, are widely used in light machinery, medical equipment, military field and other special work areas, etc.
Slewing Ring Bearing Overhauling
Revolving inspection is necessary to check correct installation after the slewing ring is intalled. For small size machinery, we can revolve the slewing bearing by hand, to ensure whether can run smoothly. Inspection items include revolving not smoothly due to foreign objects, bruises and indentation; moment force unstable due to unproper installation and unproper processing of support; over moment force due to backlash too small, installation error and sealing friction. If there is no abnormal status, dynamic run of the slewing bearing can be proceeded.
single row cross roller slewing ring
UWE single row cross roller slewing ring is mainly made up of inside and outside rings. It features compact in design, light in weight, small in assembling clearance, and high in installing precision. As the rollers are crossed arranged by 1:1, it is suitable for high precision mounting and capable to bear axial force, radial force and resultant torque simultaneously.
This series have widely application in lift transport aircraft, construction machinery, and military products.
This series have widely application in lift transport aircraft, construction machinery, and military products.
2014年8月14日星期四
010.25.315 slewing ring
1.Bearing No.: 010.25.315
2.Dimensions:d*D*H:222*408*70 mm
3.Gear option: without gears
4.Rolling element: balls
5.Ball material:GCr15
6.Ring Material: 42CrMo, 50Mn, steel 45# ,stainless steel,aluminum alloy
7.Seal: NBR
8.Normalizing hardness: 187HB-241HB
9.Quench & temper hardness: 229HB-269HB
10.Raceway hardness after quenching: 55HRC-62HRC
11.Sevice:OEM Service Offered/Design Service Offered/Buyer Label Offered
010.25.315 is single row four point contact ball slewing bearing is made of two rings, compact for, light in weight, balls contact with the raceway by four points.It can bear axial force, radial force and overturning moment at the same time,Customers can select inner gear type or outer gear type according to different applications. It is easy to use and install.
It is widely used in construction machines,such as rotary transfer machines, manpulators, excavators and so on.
As long as you supply drawings, we can manufacture in customized.
UWE single row four point contact ball slewing rings is composed of two seat rings, which design in compact structure and light weight, steel ball contact with the circular raceway at four points; it can bear the axial force, radial force and the tilting moment at the same time. UWE Single-row four point contact ball ring has the features of compact in design, and light in weight. The balls roll on the circular race at four points, so it can undertake the axial force, radial force and tipping moment at the same time.
This series of four point contact ball bearings are suitable in many engineering machinery, such as rotary conveyor welding operation machine, small cranes, small and medium-sized excavators,slewing conveyer, welding manipulator, light and medium duty crane, and other construction machinery
2014年8月13日星期三
requirements of slewing rings
Structures with slewing bearings normally require design types which are able to transmit all occurring loads with one bearing. These are normally axial, radial and tilting moments.These bearings must furthermore be suited to withstand the complete spectrum of operating conditions, as for example
• High and low temperatures including temperature fluctuations
• Overpressures and negative pressures
• Deformations of the companion structure
• Weight limits
• Limitation of the frictional torque
• Low maintenance
• Corrosion resistance
• Magnetoresistive behaviour
• Open center to run through supply lines or as access opening
Design and dimensioning
The bearings are individually designed and dimensioned for every application, this means that the buyer is not required to customize to specified geometries of catalogue bearings and characteristics but the bearing can be designed according to the customer’s structure and the specification.
• High and low temperatures including temperature fluctuations
• Overpressures and negative pressures
• Deformations of the companion structure
• Weight limits
• Limitation of the frictional torque
• Low maintenance
• Corrosion resistance
• Magnetoresistive behaviour
• Open center to run through supply lines or as access opening
Design and dimensioning
The bearings are individually designed and dimensioned for every application, this means that the buyer is not required to customize to specified geometries of catalogue bearings and characteristics but the bearing can be designed according to the customer’s structure and the specification.
UWE wire-race bearing
UWE wire-race bearings fulfill the described requirements. Due to the fact that the rolling elements do not roll on the bearing rings but on the wires which are in the bearing rings, the material selection and material combination of the components are nearly unlimited.
We are ready to develop a tailor-made solution for new applications at any time.In addition, wire-race bearings offer the possibility of a more economical repair since it is often sufficient to replace individual components such as wire races, rolling elements, spacers and seals in order to reuse a repaired bearing.
We are ready to develop a tailor-made solution for new applications at any time.In addition, wire-race bearings offer the possibility of a more economical repair since it is often sufficient to replace individual components such as wire races, rolling elements, spacers and seals in order to reuse a repaired bearing.
2014年8月11日星期一
Application of slewing ring
Single-Row Ball Slewing Rings (01-Series)
The slewing rings can be processed with special requirements: teeth cage and surface or full teeth quenching, preload, centering, special seal (warm fluorination seal, double labium seal, iron seal, iron and copper spacer or holder), etc.
Applications: Handling equipments, platform lifts, yaw bearings, rotary tables, cranes, excavators and other construction machines, welding construction, manufacture equipment and construction engineering.
Cross Roller Slewing Rings (11-Series)
Cross roller slewing rings with single-row roller raceway angle of 45°. More evenly preset potentiometer by different encumbrances and higher dynamic life than same constructed ball slewing rings. Since the product requires higher precision in manufacturing, the costs are higher compared to the ball slewing rings. But thanks to the higher running accuracy and the well-proportioned turn, it is used widely.
Applications: Robots, antennas, medical equipments, machine tools, filling and packing machines.
Double-Row Ball Slewing Rings (02-Series)
Normal double-row ball slewing rings have eight point raceways with either same or different balls. This series is widely used in heavy machinery, wind energy blade bearings and heavy construction machinery etc. Preloads, precision classes,special cages or seals & hardened gears can all be individually manufactured, according to your needs. With high requirements on design, technology and production, this series is used in heavy encumbrances , but because of low demand of installation and connection, it is more economical and practical than triple-row roller slewing bearings. Applications: Pitch bearings (blade bearings), cranes, excalvators, construction machines,other machines and equipments.
Triple-Row Roller Slewing Rings (13-series)
Triple-row roller slewing rings can be used in the most load requirements with narrow required space. Besides synthetic spacers,if demanded cages can be offered in synthal, steel, viton or brass. Special seal and surface handling like zinc plating,painting ensures applications for offshore. This series requires corresponding design and heat treatment of the raceways.thanks to the higher running reliability, stability and long durability, it is widely used in heavy-duty machinery. Applications: Deep boring equipments, fire fighting vehicles, steel plant equipment, self loading trucks,consturction machinery like cranes and other machinery and equipment.
The slewing rings can be processed with special requirements: teeth cage and surface or full teeth quenching, preload, centering, special seal (warm fluorination seal, double labium seal, iron seal, iron and copper spacer or holder), etc.
Applications: Handling equipments, platform lifts, yaw bearings, rotary tables, cranes, excavators and other construction machines, welding construction, manufacture equipment and construction engineering.
Cross Roller Slewing Rings (11-Series)
Cross roller slewing rings with single-row roller raceway angle of 45°. More evenly preset potentiometer by different encumbrances and higher dynamic life than same constructed ball slewing rings. Since the product requires higher precision in manufacturing, the costs are higher compared to the ball slewing rings. But thanks to the higher running accuracy and the well-proportioned turn, it is used widely.
Applications: Robots, antennas, medical equipments, machine tools, filling and packing machines.
Double-Row Ball Slewing Rings (02-Series)
Normal double-row ball slewing rings have eight point raceways with either same or different balls. This series is widely used in heavy machinery, wind energy blade bearings and heavy construction machinery etc. Preloads, precision classes,special cages or seals & hardened gears can all be individually manufactured, according to your needs. With high requirements on design, technology and production, this series is used in heavy encumbrances , but because of low demand of installation and connection, it is more economical and practical than triple-row roller slewing bearings. Applications: Pitch bearings (blade bearings), cranes, excalvators, construction machines,other machines and equipments.
Triple-Row Roller Slewing Rings (13-series)
Triple-row roller slewing rings can be used in the most load requirements with narrow required space. Besides synthetic spacers,if demanded cages can be offered in synthal, steel, viton or brass. Special seal and surface handling like zinc plating,painting ensures applications for offshore. This series requires corresponding design and heat treatment of the raceways.thanks to the higher running reliability, stability and long durability, it is widely used in heavy-duty machinery. Applications: Deep boring equipments, fire fighting vehicles, steel plant equipment, self loading trucks,consturction machinery like cranes and other machinery and equipment.
UWE slewing ring for excavators
UWE excavator slewing bearings/slewing rings have a high load carrying capacity, a versatile range of applications and are highly cost-effective. Due to their design, a single bearing can reliably support radial, axial and tilting moment loads. It is therefore possible in many cases to replace bearing arrangements comprising a combination of radial and axial bearings by a single bearing.
This reduces, in some cases considerably, the costs and work required in the design of the adjacent construction and the fitting of bearings. It is made up of mounting holes, inner gear or outer gear, grease hole and sealing device. It has many positive characteristics; compact structure, light weight, good rigidity, steady speed and high precision.
UWE can offer a wide range of excavators, like Komatsu, Hitachi, Kobelco, Caterpillar, Hyundai and so on. Small size four-point contact ball slewing bearings often used for this application.Single row four point contact bll bearing is composed of two seatings. This type slewing bearing ring/slewing bearing/slewing ring features compact in design,light in weight, the balls contact with the circular raceway at four moment may be simultaneously.
This reduces, in some cases considerably, the costs and work required in the design of the adjacent construction and the fitting of bearings. It is made up of mounting holes, inner gear or outer gear, grease hole and sealing device. It has many positive characteristics; compact structure, light weight, good rigidity, steady speed and high precision.
UWE can offer a wide range of excavators, like Komatsu, Hitachi, Kobelco, Caterpillar, Hyundai and so on. Small size four-point contact ball slewing bearings often used for this application.Single row four point contact bll bearing is composed of two seatings. This type slewing bearing ring/slewing bearing/slewing ring features compact in design,light in weight, the balls contact with the circular raceway at four moment may be simultaneously.
Slewing rings medical application
UWE slewing rings dedicated to medical applications are designed for a high rotating speed, constant rotating torque and low noise,specifically for Radiotherapy applications.
UWE also supplies slewing ring for pharmaceutical industry for all production steps, mixing, filling, cleaning.The perfect circularity and the high precision of our bearing are the result of our specific finishing and the matching of the rings and the rolling elements. We also propose innovative sealing solutions to avoid any leakage in a clean environment.
UWE also supplies slewing ring for pharmaceutical industry for all production steps, mixing, filling, cleaning.The perfect circularity and the high precision of our bearing are the result of our specific finishing and the matching of the rings and the rolling elements. We also propose innovative sealing solutions to avoid any leakage in a clean environment.
Slewing ring for wind energy
UWE is a leading Chinese supplier of blade bearing and yaw bearings for wind energy, from Small Wind Turbines of 750kW to the latest Multi-MW Offshore turbines up to 5MW.
The custom designed UWE slewing bearings are engineered in close cooperation with turbine manufacturers: our dedicated engineering team is at your service for new developments and design optimisation.UWE slewing bearings are delivered worldwide.
The custom designed UWE slewing bearings are engineered in close cooperation with turbine manufacturers: our dedicated engineering team is at your service for new developments and design optimisation.UWE slewing bearings are delivered worldwide.
Slewing ring for precision application
UWE is the expert in high precision preloaded crossed roller bearings for precision applications like robotics, machine-tools, indexing and positioning tables, CNC tilting tables, milling heads, and many others. UWE crossed roller bearings from medium diameter 148 mm to 2455 mm for small to extra large rotary tables.UWE three row roller bearings with inner diameter 200 mm to 1030 mm interchangeable with the reference product on the market.
Our R & D department offers full technical support for specific projects and simultaneous engineering leading to modifying existing products or developing new ones to answer to the most special inquiries.
Thanks to raceway finish by grinding, systematic matching of the rings and preload, we offer the best reliability and precision, proven by extensive in-house testing, for the applications all along the required lifetime.
Our R & D department offers full technical support for specific projects and simultaneous engineering leading to modifying existing products or developing new ones to answer to the most special inquiries.
Thanks to raceway finish by grinding, systematic matching of the rings and preload, we offer the best reliability and precision, proven by extensive in-house testing, for the applications all along the required lifetime.
Slewing ring for packaging application
Packaging and bottling industry are synonymous of high productivity link with very high technology process. UWE has developed in accordance with those high requirements,slewing rings with large diameters of these applications. These particular slewing bearings require strict process control. Low and constant rotating torque, as well as weight saving by light design are also key factors to ensure our customers the best products.Our quality gives a very low level of maintenance.Especially for PET bottles, UWE is present at all steps of the production from heating of the preform to labelling of the final products.
Slewing ring for construction application
Because of the light structure of the crane, UWE slewing ring is an essential and strategic part.Our design matches perfectly the life time required by the customer. The quality and the precision of our manufacturing are the key to ensure good running after many dismantling operations of the crane.Truck telescopic crane requiring high stiffness with high capacity is also one of the applications where UWE bearings make the difference thanks to unique preloading technology.UWE slewing ring participate to the construction of thousands of buildings everyday all around the world with total safety.
Public works does cover a wide range of applications, since its very beginning UWE has developed specifics slewing rings that suits all the particularities of those applications.Thanks to latest technology calculation, design is permanently optimized to follow our customers new developments, in order to offer what the market needs.Concrete mixers requires smooth rotation with low torque to avoid creation of heat and vibration in the system.Quality, lifetime of UWE bearings.
Public works does cover a wide range of applications, since its very beginning UWE has developed specifics slewing rings that suits all the particularities of those applications.Thanks to latest technology calculation, design is permanently optimized to follow our customers new developments, in order to offer what the market needs.Concrete mixers requires smooth rotation with low torque to avoid creation of heat and vibration in the system.Quality, lifetime of UWE bearings.
Slewing ring for mining application
Stacker reclaimers, Bucket Wheel, Spreaders, as well as ship loaders and unloaders are very demanding applications.The high capacity of UWE slewing rings is obtained by the control of the hardening process of the raceways and the gear. Double rows of balls for heavy loads & compact solution or Combination of Rollers and Ball for very high axial loads & moments as well as small radials efforts.UWE also manufacture slewing rings for application in underground mining where compact & reliable solutions are required for an aggressive environment.
Slewing ring for offshore application
Thanks to UWE engineering and R&D department, We are able to provide tailor made solutions being used on wide range of Offshoreand Marine application.UWE Slewing Rings can help customers to do certificate like DNV, ABS, API, GL, BV, LLOYDS for examples..We also offer unique sealing complying with seawater environment, as well as thin stainless steel layer to increase lifetime on seal contact surface.For large Offshore cranes, Bulk Handling, Marine cranes our special design is also a popular solution, meeting requirements for huge axial loads& tilting moments.
Slewing ring for handling application
The stiffness & preload of UWE slewing ring are a perfect solution for the highest manlift. Those applications require precision in manoeuvring and safety while working in difficult environment subject to wind. Especially for firetrucks the highest stiffness ensure the highest efficiency in the works.Our special design gives very compact bearings, which is essential for this product. Our process control gives the customer a very simple solution to set up the pinion in order to save time during the mounting of the machines.Handling container in harbour requires more and more efficiency, UWE supply for example Rubber tyre gantry crane &Reach Stackers for this environment. For lots of various Handling applications UWE supplies all range of Slewing Ring matching the different requirement of our customers.
2014年8月2日星期六
slewing bearing installation
Bearing installation
When you get UWE bearing, please mount slewing bearing as instructions below:
(1)Require the installation surface has sufficient strength and rigidity.
(2)Clean bearing and surface of the components, each surface can not have corrosion.
(3)The mounting surface should have locating pin or locating mouth, to prevent the bearing ran to each other.
(4)After contact with the mounting surface, you should check fit clearance with a feeler, the gap can be filled with plastic or a padded to prevent deformation of the bolt tightening.
(5)When installing, ensure that the bearing quenching soft belt should be located in the non-load bearing area or not often load area or load minimum area.
(6)Bearing mounting bolts must be of high strength bolts, according to the loading conditions, select the appropriate intensity level.
(7)Installation washer should adopt flat washer to ensure bearing pre load uniformly.
(8)Bolt preload requires sufficient strength, the preload force is 0.7 times to the bolt material yield limit. Best installed using a torque wrench to ensure uniform force and improve quality of the installation.
(9)Tighten bolts should adopt a "star" cross or symmetrical diagonal tightening way, first pretension and then follow the strength requirements and tighten the bolts.Tighten the bolts needs a torque wrench .
(10)For toothed products,must do the gear backlash detection before tighten the mounting bolts. To ensure the minimum or maximum diameter (with logo) of the gear ring beating meet the design requirements (available 0.05 ~ 0.3mm feeler gauge calibration) .
Slewing ring installation related parameters requirements
(1)Mounting surface roughness is less than Ra12.5.
(2)The maximum allowable values of the installation surface flatness can be determined according to actual working condition, but the flatness change must be uniform increasing or decreasing, within the scope of the circumference of a circle, not allowed to appear more than two (including two) peak, and 100 mm face runout is not allowed within the scope of more than 0.015 mm
(3)Maximum value on the radial direction inclination of the mounting surface is 0.04mm .
(4)Prestressing force of bolt installation must be determined according to the strength level of the bolt,the pre load force is 0.7 times to the bolt material yield limit.
When you get UWE bearing, please mount slewing bearing as instructions below:
(1)Require the installation surface has sufficient strength and rigidity.
(2)Clean bearing and surface of the components, each surface can not have corrosion.
(3)The mounting surface should have locating pin or locating mouth, to prevent the bearing ran to each other.
(4)After contact with the mounting surface, you should check fit clearance with a feeler, the gap can be filled with plastic or a padded to prevent deformation of the bolt tightening.
(5)When installing, ensure that the bearing quenching soft belt should be located in the non-load bearing area or not often load area or load minimum area.
(6)Bearing mounting bolts must be of high strength bolts, according to the loading conditions, select the appropriate intensity level.
(7)Installation washer should adopt flat washer to ensure bearing pre load uniformly.
(8)Bolt preload requires sufficient strength, the preload force is 0.7 times to the bolt material yield limit. Best installed using a torque wrench to ensure uniform force and improve quality of the installation.
(9)Tighten bolts should adopt a "star" cross or symmetrical diagonal tightening way, first pretension and then follow the strength requirements and tighten the bolts.Tighten the bolts needs a torque wrench .
(10)For toothed products,must do the gear backlash detection before tighten the mounting bolts. To ensure the minimum or maximum diameter (with logo) of the gear ring beating meet the design requirements (available 0.05 ~ 0.3mm feeler gauge calibration) .
Slewing ring installation related parameters requirements
(1)Mounting surface roughness is less than Ra12.5.
(2)The maximum allowable values of the installation surface flatness can be determined according to actual working condition, but the flatness change must be uniform increasing or decreasing, within the scope of the circumference of a circle, not allowed to appear more than two (including two) peak, and 100 mm face runout is not allowed within the scope of more than 0.015 mm
(3)Maximum value on the radial direction inclination of the mounting surface is 0.04mm .
(4)Prestressing force of bolt installation must be determined according to the strength level of the bolt,the pre load force is 0.7 times to the bolt material yield limit.
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