Key Points For Installation And Maintenance Of Turntable Bearings

The slewing bearing is a large bearing with a special structure that can simultaneously bear large axial load, radial load and overturning moment and other comprehensive loads, and integrates multiple functions such as support, rotation, transmission and fixation. Therefore, when installing the slew plate bearing, we must do relevant inspections or matters that need to be paid attention to during installation. For such large bearings, we must do maintenance, storage, etc. to avoid the following damage to the slew plate bearing: resulting in inability to use it normally.

   1. Installation of turntable bearings

   Before installing the turntable bearing, the mounting surface of the host must be inspected first. The supporting parts must have sufficient strength, the connecting surface must be machined, and the surface must be smooth 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 installation plane and to reduce vibration. The ring of the slewing bearing has a quenched soft zone, which is marked "S" on the end face of the ring. When installing, the soft zone should be placed in the non-load zone or the non-frequent load zone (the plug hole is always located in the soft zone). belt).

   When installing the turntable bearing, you should first perform radial positioning, cross-tighten the mounting bolts, and check the rotation of the bearing. Sufficient pre-tightening force should be used when tightening bolts, and the pre-tightening force should be 70% of the yield limit of the bolt material. Mounting bolts should be equipped with quenched and tempered flat washers and spring washers are strictly prohibited.

   2. Maintenance of the slew plate bearing: After the slew plate bearing has been installed and put into operation for 100 hours of continuous operation, a comprehensive inspection should be made to see if the pretightening torque of the mounting bolts meets the requirements. The above inspection should be repeated every 500 hours of continuous operation. After installation, the turntable bearing should be filled with an appropriate amount of grease, and the bearing should be rotated while filling to make the grease evenly distributed. After the slewing bearing has been working for a period of time, it will inevitably lose part of the grease. Therefore, the slewing bearing in normal operation should be replenished with grease every 50 to 100 hours.