2014年11月17日星期一

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.

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 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.

2014年10月20日星期一

Ferris wheel slewing ring/ferris bearing

Some of the largest modern ferris wheels have cars mounted on the outside of the rim, with electric motors to independently rotate each car to keep it upright. These wheels are sometimes referred to as observation wheels, and their cars referred to as capsules, however these alternative names are also sometimes used for wheels with conventional gravity-oriented cars.
The slewing ring bearings used on the ferris wheel are used with the internal ring. Mostly, the bearings should be light and safety enough during its rotation. For the slewing ring bearings used on the Ferris wheel/sky wheel. it will also be very important for the anticorrosion, thus, the slewing bearings can be used on the Ferris wheel for as long time as it can.
Mostly UWE ferris wheel slewing bearing is designed by customers, we offer technical support and excellent service.

      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