What is the importance of the yaw bearing?

With the rapid development of the machinery industry, the application of slewing bearings is becoming more and more extensive, and the yaw bearing is a new type of slewing bearing product. It requires zero clearance or negative clearance for the finished product, strict regulations on the rotational damping torque of the bearing, and very high precision of the finished product.

• How does the yaw bearing work?

• What are the characteristics of the yaw bearing?

• Why should the yaw bearing be closed?

How does the yaw bearing work?

After the yaw bearing is assembled, there are two sources of damping torque: one is the frictional resistance of the raceway part, and the other is the frictional resistance of the sealing strip and the sealing surface. The latter is generally constant under the same processing conditions, so the magnitude of the damping moment after the yaw bearing is assembled mainly depends on the former.

The frictional resistance torque generated by the raceway part during rotation mainly depends on the size of the bearing clearance. The larger the gap, the smaller the resistance, and the smaller the gap, the larger the resistance. The yaw bearing requires zero clearance or negative clearance, and the amount of negative clearance is determined by the friction damping torque after assembly. Therefore, the size of the friction damping torque after assembly basically depends on the assembly clearance value of the yaw bearing, and the formation of this value mainly depends on: the size of the finishing car before the raceway quenching, the raceway surface quenching, and the raceway quenching after the quenching. The grinding size and the size of the rolling elements are matched in four links.

What are the characteristics of the yaw bearing?

Yaw and bearings have special requirements in terms of clearance. Compared with the yaw bearing, the impact load of the pitch bearing is relatively large, and the wind blows to the blade and the vibration is also large, so the clearance of the pitch bearing is required to be zero clearance or slightly negative clearance value, so that in the case of vibration It can reduce the fretting wear of the bearing. yaw bearings require small clearance values.

Wind turbine equipment works in the field, and part of the support and yaw and pitch bearings are exposed outside, which will be polluted by the atmosphere, and the high humidity environment will also corrode the bearing matrix. Therefore, the exposed yaw and pitch bearings are exposed to the outside world. The parts of the bearing require surface anti-corrosion treatment.

Why should the yaw bearing be closed?

Due to the existence of pores in the sprayed coating, the yaw bearing must be sealed to increase the corrosion resistance.

After spraying and assembling, the main exposed machining surfaces of the yaw bearing are the gear surface, the mounting thread surface and the arc raceway surface. The first two are coated with anti-rust oil after assembly, and the latter is coated with lubricating grease during assembly. The inner packaging of the finished product is closed and wrapped with plastic film, and the outer layer is wrapped with plastic braided tape for protection, which can meet the requirements of anti-rust.

This is the introduction related to the yaw bearing. Do you also have a deeper understanding? LYXQL Slewing Bearing Co., Ltd. has committed to providing the most suitable yaw bearings at a reasonable price.