about wind turbine gearbox

http://windturbines.china-windturbine.com/2010/03/

wind turbines

Wind turbine in the gear box is an important mechanical parts, whose main function is to round in the wind under the action of wind generated power passed to the generator and its corresponding speed. The wind speed is usually very low round, well short of the required generator speed, gear box gear pair must pass the role of the growth achieved, it will also be called the growth in box gear box. According to the general layout of unit requirements, sometimes with the wind wheel hub directly connected to the drive shaft (commonly known as the shaft) and the gear box together as one, there will be large shaft and gear box were arranged, during installation or the use of up tight coupling connected structure. In order to increase the braking capacity of units, often in the gear box input or output is set brakes, brake with the tip (scheduled for slurry from the wind wheel) or variable pulp away from the brake transmission co-unit of the joint brake.
As the unit installed in the high mountains, wilderness, beaches, islands and other draft Department, subject to erratic changes to the role of variable load and strong gusts of wind impact on perennial withstand heat and extreme cold temperature impact, combined with the natural environment in which transportation is inconvenient and gear box mounted on top of the tower’s narrow space, the event of a failure, repair is very difficult, so its reliability and service life have raised much higher than the average mechanical demands. For example, the requirements of the component materials, in addition to regular state mechanical properties, but also should have a low-temperature state, anti-cold brittleness and other characteristics; should ensure a smooth gear box, to prevent vibration and shock; to ensure adequate lubrication, and so on. Summer and winter temperature difference of a huge area, you want to configure the appropriate heating and cooling equipment. Would also like to set up monitoring points, on the status of remote control operation and lubrication.
Different types of wind turbines are not the same as the requirements of the arrangement of the gear box and a structure and therefore vary. Horizontal axis in the wind power sector, wind turbine with a fixed parallel shaft gears and planetary gear drive the most common.
As mentioned earlier, wind power generation by natural conditions, the impact of the emergence of some special meteorological conditions, all of which might lead to failure of wind turbine, while the small cabin is not like on the ground as the machine has a solid seat base, the entire transmission system of the power matching and torsional vibration of the factors that has always epitomized the weak link in a large number of facts show that the link is often in the gear box unit. Therefore, strengthening the study of the gear box and attach importance to their work of maintenance is particularly important. Section II of the design requirements must be designed to ensure that in meeting the reliability and life expectancy under the premise of the streamlined structure and the weight of the lightest. Should normally be used CAD optimized design, optimum transmission scheduling program, select a reasonable design parameters, choose a stable and reliable components and have good mechanical properties, as well as the environment remains stable under extreme temperature variations of the material, and so on.