4 m harbor cranes usually use internal or external gear teeth diameter three row roller slewing bearing to withstand high overturning moment. All kinds of cranes bearing, bucket wheel bearing, marine cranes and crane bearing usher bearing repair peak, the failure rate frequently, in order to save costs and improve the utilization of the bearing, slewing bearing repair, repair of wheel bearings business growing. About deck crane bearing appears sound, sometimes accompanied by vibrations, which may be for the following reasons:
1. Bearing heavy loss, fragmentation caused by the ball portion;
2. Ball isolation block (nylon or metal material) crushed, causing blockage;
3. bearing channel layer fatigue hardness loss, pitting, pits, pitting, bearing operation is not flexible;
4. bearing long-term stress and deformation, ovality tolerance
5. seal failure, bearing lubrication channel not long, into the channel of debris blockage.
Bearing is the other parts on the shaft will produce relative motion, used to reduce friction coefficient during power transmission and keep the machine shaft center fixed position, its main function is to support the rotary body, in order to reduce the equipment in the transmission process of mechanical load friction coefficient. According to the motion of the frictional properties of different components, bearings can be divided into two types of rolling bearings and sliding bearings.
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