slewing ring bearings Wind power bearing

Wind power bearing lubrication analysis

Wind speed gearbox input shaft is generally 10-20 rev / min, due to the relatively low speed, [1] which is leading to the input shaft bearing carrier support high precision bearings‍ bearing oil film formation is often more difficult. The role of the film is when the bearing operation to slewing ring bearings two metal contact surfaces, avoid direct metal to metal contact occurs. We can introduce a parameter λ to characterize the effect of lubricating the bearing (λ is defined as the film thickness and the roughness of the two contacting surfaces and the ratio).

If λ is greater than 1, indicating Taper roller bearings‍ that the thickness of the metal film sufficient to separate the two surfaces, the lubricating effect is good; if λ is less than 1, then the thickness of the oil film can not completely separate the two metal surfaces, the lubricating effect is not ideal. In case of bad operation of the lubrication. Because wind power gearboxes are generally used ISOVG320 viscosity lubricant circulation, so if you find λ is less than 1, we generally can only be improved by reducing the lubricating effect of the roller bearing raceways and roughness.

In addition, the gear box design, the planet carrier bearing support end slewing bearing‍ to try to avoid bearing size is too small, the actual application analysis, we found that even life to meet the conditions, this design will lead to a small bearing line speed is very low, the film more can not be formed.