How to maintain the tower crane slewing ring? Here are 9 points for reference

How to maintain the tower crane slewing ring? Here are 9 points for reference

(1) Tower crane maintenance technology slewing bearing installation support must be rigid and the mounting surface should be smooth.Before assembling the slewing bearing, the bearing should be de-stressed, and the maintenance of the tower crane can reduce the deformation of the slewing bearing.The contact surface of slewing ring must be cleaned during assembly.

(2) The changes of noise and rotary resistance moment should be paid attention to during the use of tower crane maintenance technology, tower crane maintenance if there is abnormal phenomenon should be removed and checked.

(3) The lifting and maintenance technique of tower crane rotating support must be lifted horizontally or stored, no vertical lifting or storage,to avoid deformation.



(4) Tower crane maintenance technology before bolts completely tight, the tower crane maintenance technology should be checked for gear meshing, the meshing condition should accord with the requirement of precision gear: tower crane maintenance technology namely gear pair under slight brake operation after the distribution of the tooth surface contact spots on the direction of tooth height not less than 25%, tower crane maintenance technology on the tooth length direction is not less than 30%.

(5) 10 shift work of the technical gear face of tower crane maintenance should be cleared once and grease should be reapplied.

(6) Tower crane maintenance technology in order to ensure the reliability of bolt work and avoid insufficient pre-tightening force of bolt, the first 100 hours and 500 hours of rotary support work, tower crane maintenance should check the pre-tightening torque of bolt separately.Pre-tightening torque should be checked every 1000 hours thereafter.

(7) High strength bolts and nuts are used for connecting bolts and nuts with rotating support;Double nut fastening and loose proof.

(8) When the tower crane maintenance technique tightens the nut, the thread of the bolt and the end face of the nut shall be lubricated, and the torque wrench shall be applied to tighten the nut evenly and evenly in the circumferential direction.When the tower crane maintenance technology is tightened at the last time, the pre-tightening torque on each bolt shall be roughly uniform.

(9) Tower crane maintenance technology: four grease cups are arranged on the surface of the gear ring of the rotary support to align the raceway, thus adding grease to the raceway.In general, the tower crane maintenance rotary support operation 50 hours lubrication once.Tower crane maintenance technology must be added every time, until the oil from the seal.