As a clean energy source that does not produce carbon dioxide that can lead to the greenhouse effect, wind power generation is rapidly spreading around the world.

Large wind turbine (windmill) is a giant machinery. Now many 2MW wind power equipment under construction, the windmill blades are about 40 meters long, the height of the rotating axis is 60 to 100 meters, and the total weight is no less than 200 tons.

Therefore, the bearings used in the windmill must be large, with an inner diameter range of 100 mm to 700 mm. Some models need bearings with an inner diameter of nearly 2 meters.

There are only 6 manufacturers of such large bearings to the market, including NSK, in the world.

Wind turbine industry is now an industry developing in the global scope, therefore, in addition to bearing manufacturing, but also in the world's major outlets to carry out marketing activities and technical services, these are important conditions.

Wind power bearing is a special bearing, with harsh use environment, high maintenance cost and high life requirement.

main features 1. Bad use environment 2. High maintenance costs 3. High life span is required Generally, only a part of the roller of the running bearing bears the same load, and the area of the roller is called the bearing area of the bearing.

The load size of the bearing and the size of the running gap will have an impact on the bearing area.

If the bearing area is too small, the roller is prone to skid in the actual operation.

For the wind power gearbox, if the design of the spindle adopts the double-bearing support scheme, then theoretically only the torque is transmitted to the gearbox.

In this case, after a simple force analysis, it is not difficult to find that the load of the planetary frame support bearing is relatively small, so the bearing area of the bearing is often relatively small, and the roller is prone to skid.

In the design of wind power gearbox, planetary frame support bearings generally adopt two schemes of single-column conical bearings or two full roller cylindrical bearings.

We can improve the bearing area by properly pretightening the cone roller bearing or reducing the gap of the cylindrical roller bearing.