Thrust roller bearing use：heavy machine tools, high-power marine gearboxes, oil drilling rigs, vertical motors and other machinery.The basic structure of bearings are the inner ring and outer ring in the middle with a cage to fix the rolling body, now this era of rapid industrial development, different mechanical equipment also need more kinds of bearings to cooperate with the use and production. Today, we will introduce thrust roller bearings.
Thrust roller bearing is used to bear axial load mainly shaft, radial combined load, but the radial load shall not exceed 55% of the axial load. Compared with other thrust roller bearings, such bearings have a lower friction factor, higher speed, and have a spherical performance.
Thrust roller bearings pressed into the thrust roller bearings should be flexible rotation without blocking sense. If there is obvious rotation inflexibility, it indicates that the size of the shaft is too large, the tolerance should be adjusted downward.
If the thrust roller bearing pressed into the shaft after the hand rotation has obvious “rustle” feeling, it may be too large shaft tolerance or shaft roundness is not good. So in the control of the shaft and thrust roller bearing room tolerance should also control the roundness, many domestic manufacturers only on the tolerance control, no control of roundness.
Because the thrust roller bearings are high-precision products, such as improper assembly is easy to cause damage to the thrust roller bearing groove, resulting in damage to the thrust roller bearings.
Thrust roller bearings in the assembly should have a special mold, can not be randomly knocked, in the press into the shaft can only be small circle force, press the large circle can only be large circle force. Assembly requires the use of air pressure or hydraulic pressure, in the pressure of the upper and lower die to outside the horizontal state, such as tilt will lead to thrust roller bearing groove due to force damage, and make thrust roller bearings produce guide ring.
Thrust roller bearings in the installation to the rotor to do dynamic balancing is easy to dynamic balancing when the generated iron chips into the thrust roller bearings inside, so it is best to install thrust roller bearings before doing dynamic balancing.
There are some manufacturers in order to facilitate the assembly, assembly in the thrust roller bearing room coated with some oil or grease lubrication effect, but often the operator is difficult to control the amount of good, if the oil or grease in the thrust roller bearing room accumulate more, in the thrust roller bearing rotation is easy along the shaft into the thrust roller bearing inside. Thrust roller bearing room is best not to apply oil or grease, such as non-coating can not be controlled in the thrust roller bearing room there is no accumulation.
Lacquer rust is characterized by more in the sealed motor, the motor in the assembly sound is very good, but in the warehouse after some time, the motor noise becomes very large, remove the thrust roller bearings have serious rust phenomenon. Many manufacturers used to think that it is the problem of thrust roller bearing, after our continuous publicity, the motor factory has realized that it is mainly the problem of insulating paint.
The problem is mainly because the insulating paint volatile acid in a certain temperature, humidity to form corrosive substances, the thrust roller bearing groove corrosion leads to damage to the thrust roller bearings. The problem can only be assembled after using good insulating paint and ventilation for a period of time after drying.
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