Before the slewing bearing device, the device surface of the main machine should be checked. The support should have sufficient strength, the connecting surface should be machined, and the surface should be flat and free of debris and burrs. For those that cannot be machined to achieve the required flatness, special plastics with high injection strength can be used as fillers to ensure the accuracy of the device plane and to reduce vibration. The ring of the slewing bearing has a quenched soft zone, which has a mark S on the end face of the ring. The position of the soft zone should be placed in the non-load area or the non-constant load zone (the plug hole is always located at the soft zone). ).
When installing the slewing bearing, radial positioning should be carried out first, the bolts of the device should be inserted and tightened, and the rotation of the bearing should be checked. In order to ensure the smooth transmission of the bearing, the gears should be meshed and checked before the device bolts are not tightened. There should be a sufficient pre-tightening force when tightening the bolts, and the pre-tightening force should be 70% of the yield limit of the bolt material. Device bolts should be equipped with quenched and tempered flat washers, and spring washers are prohibited. After the installation of the slewing bearing is completed, put it into operation. After 100 hours of continuous operation, check whether the pre-tightening torque of the device bolt meets the requirements. Repeat the above inspection every 500 hours of continuous operation in the future.
The end of the slewing bearing device should be filled with an appropriate amount of smooth grease, and the slewing bearing should be filled while filling to make the smooth grease evenly distributed. After a period of operation, the slewing bearing will inevitably lose part of the smooth grease. Therefore, the slewing bearing in normal operation should be supplemented with lubricating grease every 50 to 100 hours. Regarding slewing bearings operating under high temperature environments or dusty conditions, the period of adding smooth grease should be appropriately shorter. When the machine is to be shut down for storage, it is also necessary to fill it with satisfactory grease.
Slewing bearing smoothness and maintenance methods:
1. A small amount of No. 2 extreme pressure lithium-based grease (GB/T7324-1994) is applied to the track of the slewing bearing when it leaves the factory, and it should be refilled with new grease according to different operating conditions.
2. The slewing bearing raceway should be filled with smooth grease regularly. Generally, ball bearings are refueled every 100 hours of operation, and roller bearings are refueled every 50 hours. In special operating environments, such as tropical, high humidity, dusty, large temperature differences, and consecutive operations, the smoothing cycle should be shortened. It is also necessary to add new lubricating grease before and after the machine is suspended for a long time. Every time it is smooth, it is necessary to fill the raceway with smooth grease until the leakage from the sealing belt stops. When the smooth grease is injected, the slewing bearing should be slowly rolled to make the smooth grease filled evenly.
3. The tooth surface should be cleaned frequently and coated with corresponding smooth grease.
