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Maintenance of slewing bearing device of tower crane

  • Categories:Industry news
  • Author:
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  • Time of issue:2020-01-07 08:13
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(Summary description)  (1) The mounting support of the slewing bearing (the seat supporting the bottom surface of the ring gear and the seat placed on the upper surface of the inner ring) must have sufficient rigidity, and the mounting surface should be flat. Before assembling the slewing bearing, the bearing should be stress-relieved to reduce the deformation of the slewing bearing. The contact surface of the bearing and the slewing bearing must be cleaned up during assembly.   (2) Pay attention to the change of noise and the change of rotation resistance torque during use, and disassemble and inspect if there is any abnormal phenomenon.   (3) The slewing bearing must be lifted or stored horizontally. Do not lift or store it vertically to avoid deformation.   (4) Before the bolts are fully tightened, the gear meshing inspection should be performed, and the meshing condition should meet the requirements of gear accuracy: that is, the contact spots distributed on the tooth surface of the gear pair after running under slight braking are in the height direction of the gear teeth Not less than 25%, not less than 30% in the length direction of gear teeth.   (5) The debris should be removed once for 10 shifts of tooth surface work, and re-applied with grease.   (6) In order to ensure the reliability of the bolt work and avoid the insufficient preload of the bolt, the preload torque of the bolt should be checked separately after the first 100 hours and 500 hours of the slewing bearing work. The pre-tightening torque should be checked every 1000 hours thereafter.   (7) High-strength bolts and nuts are used for bolts and nuts connected to the slewing bearing; double nuts are used for fastening and anti-loosening.   (8) When tightening the nut, the thread of the bolt and the end surface of the nut should be coated with lubricating oil, and should be tightened with a torque wrench symmetrically and evenly in the circumferential direction multiple times. During the last tightening, the pre-tightening torque on each bolt should be approximately uniform.   (9) Four oil cups are evenly distributed on the upper surface of the slewing ring gear aligned with the raceway, thereby adding grease to the raceway. Under normal circumstances, the slewing bearing is lubricated once every 50 hours. Each time you add oil, you must add enough oil until grease leaks from the seal.

Maintenance of slewing bearing device of tower crane

(Summary description)  (1) The mounting support of the slewing bearing (the seat supporting the bottom surface of the ring gear and the seat placed on the upper surface of the inner ring) must have sufficient rigidity, and the mounting surface should be flat. Before assembling the slewing bearing, the bearing should be stress-relieved to reduce the deformation of the slewing bearing. The contact surface of the bearing and the slewing bearing must be cleaned up during assembly.

  (2) Pay attention to the change of noise and the change of rotation resistance torque during use, and disassemble and inspect if there is any abnormal phenomenon.

  (3) The slewing bearing must be lifted or stored horizontally. Do not lift or store it vertically to avoid deformation.

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

  (5) The debris should be removed once for 10 shifts of tooth surface work, and re-applied with grease.

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

  (7) High-strength bolts and nuts are used for bolts and nuts connected to the slewing bearing; double nuts are used for fastening and anti-loosening.

  (8) When tightening the nut, the thread of the bolt and the end surface of the nut should be coated with lubricating oil, and should be tightened with a torque wrench symmetrically and evenly in the circumferential direction multiple times. During the last tightening, the pre-tightening torque on each bolt should be approximately uniform.

  (9) Four oil cups are evenly distributed on the upper surface of the slewing ring gear aligned with the raceway, thereby adding grease to the raceway. Under normal circumstances, the slewing bearing is lubricated once every 50 hours. Each time you add oil, you must add enough oil until grease leaks from the seal.

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2020-01-07 08:13
  • Views:
Information

  (1) The mounting support of the slewing bearing (the seat supporting the bottom surface of the ring gear and the seat placed on the upper surface of the inner ring) must have sufficient rigidity, and the mounting surface should be flat. Before assembling the slewing bearing, the bearing should be stress-relieved to reduce the deformation of the slewing bearing. The contact surface of the bearing and the slewing bearing must be cleaned up during assembly.

  (2) Pay attention to the change of noise and the change of rotation resistance torque during use, and disassemble and inspect if there is any abnormal phenomenon.

  (3) The slewing bearing must be lifted or stored horizontally. Do not lift or store it vertically to avoid deformation.

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

  (5) The debris should be removed once for 10 shifts of tooth surface work, and re-applied with grease.

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

  (7) High-strength bolts and nuts are used for bolts and nuts connected to the slewing bearing; double nuts are used for fastening and anti-loosening.

  (8) When tightening the nut, the thread of the bolt and the end surface of the nut should be coated with lubricating oil, and should be tightened with a torque wrench symmetrically and evenly in the circumferential direction multiple times. During the last tightening, the pre-tightening torque on each bolt should be approximately uniform.

  (9) Four oil cups are evenly distributed on the upper surface of the slewing ring gear aligned with the raceway, thereby adding grease to the raceway. Under normal circumstances, the slewing bearing is lubricated once every 50 hours. Each time you add oil, you must add enough oil until grease leaks from the seal.

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