News

News Center

Maintenance of tower crane slewing bearing device


Release time:

2020-01-07

(1) The mounting support of the slewing bearing (the seat on the lower bottom surface of the ring gear and the seat on the upper surface of the inner seat ring) must have sufficient rigidity, and the mounting surface must be flat. Before assembling the slewing bearing, the bearing should be treated with stress relief to reduce the deformation of the slewing bearing. The contact surface between the support and the slewing bearing must be cleaned during assembly. (2) In use, attention should be paid to the change of noise and the change of rotation resistance torque. If there is any abnormal phenomenon, it should be disassembled and inspected. (3) The slewing bearing must be lifted or stored horizontally, and must not be lifted or stored vertically to avoid deformation. (4) Before the bolts are completely tightened, the meshing inspection of the gears should be carried out, and the meshing condition should meet the requirements of gear accuracy: that is, the contact spots distributed on the tooth surface after the gear pair is running under slight braking are not less than 25% in the height direction of the gear teeth, and not less than 30% in the length direction of the gear teeth. (5) The sundries shall be removed once for 10 shifts of tooth surface work, and grease shall be applied again. (6) In order to ensure the reliability of bolt work and avoid insufficient bolt pre-tightening force, the bolt pre-tightening torque should be checked separately after the first 100 hours and 500 hours of slewing bearing work. The pre-tightening torque shall be checked every 1000 hours thereafter. (7) The bolts and nuts connecting the slewing bearing are all high-strength bolts and nuts; double nuts are used for fastening and anti-loosening. (8) When tightening the nut, the thread of the bolt and the end face of the nut should be coated with lubricating oil, and the torque wrench should be used to tighten the nut several times symmetrically and evenly in the circumferential direction. When tightening the last time, the pre-tightening torque on each bolt should be approximately uniform. (9) 4 oil cups are evenly distributed on the upper surface of the ring gear of the slewing bearing aligned with the raceway, thus adding grease to the raceway. In general, the slewing bearing is lubricated once every 50 hours. Fill the oil every time until the grease seeps from the seal.

Maintenance of tower crane slewing bearing device

(1) The mounting support of the slewing bearing (the seat on the lower bottom surface of the ring gear and the seat on the upper surface of the inner seat ring) must have sufficient rigidity, and the mounting surface must be flat. Before assembling the slewing bearing, the bearing should be treated with stress relief to reduce the deformation of the slewing bearing. The contact surface between the support and the slewing bearing must be cleaned during assembly.

(2) In use, attention should be paid to the change of noise and the change of rotation resistance torque. If there is any abnormal phenomenon, it should be disassembled and inspected.

(3) The slewing bearing must be lifted or stored horizontally, and must not be lifted or stored vertically to avoid deformation.

(4) Before the bolts are completely tightened, the meshing inspection of the gears should be carried out, and the meshing condition should meet the requirements of gear accuracy: that is, the contact spots distributed on the tooth surface after the gear pair is running under slight braking are not less than 25% in the height direction of the gear teeth, and not less than 30% in the length direction of the gear teeth.

(5) The sundries shall be removed once for 10 shifts of tooth surface work, and grease shall be applied again.

(6) In order to ensure the reliability of bolt work and avoid insufficient bolt pre-tightening force, the bolt pre-tightening torque should be checked separately after the first 100 hours and 500 hours of slewing bearing work. The pre-tightening torque shall be checked every 1000 hours thereafter.

(7) The bolts and nuts connecting the slewing bearing are all high-strength bolts and nuts; double nuts are used for fastening and anti-loosening.

(8) When tightening the nut, the thread of the bolt and the end face of the nut should be coated with lubricating oil, and the torque wrench should be used to tighten the nut several times symmetrically and evenly in the circumferential direction. When tightening the last time, the pre-tightening torque on each bolt should be approximately uniform.

(9) 4 oil cups are evenly distributed on the upper surface of the ring gear of the slewing bearing aligned with the raceway, thus adding grease to the raceway. In general, the slewing bearing is lubricated once every 50 hours. Fill the oil every time until the grease seeps from the seal.

Tag:

Huaxia Heavy Industry

Mainly engaged in the production and sales of tower cranes, lifts and related accessories.

%{tishi_zhanwei}%