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Slewing bearings (also called slewing rings, slewing ring bearings, slew bearings, slew rings, slew ring bearings, swing bearings, turntable bearings) are machine elements that can simultaneously transmit axial and radial forces as well as tilting moments.
LYXQL can produce slewing bearings with outer diameter from 1500mm to 18000mm.
Single row ball slewing ring bearings are usually used for tower cranes, as an important rotating device for tower crane, slewing bearings must always to be checked and maintained timely.
If it is found that the tower crane slewing ring bearing device is out of order, it should be adjusted or repaired in time. Now, the maintenance knowledge of the turntable bearings device of the tower crane will be explained in detail.
(1) The mounting support of the slewing rings must have sufficient rigidity, and the mounting surface must be flat. Before assembling the slew bearings, the contact surface between the support and the slewing ring must be cleaned up during assembly.
(2) During 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 turntable bearing must be hoisted or stored horizontally. Never lift or store vertically to avoid deformation.
(4) Before the bolts are completely tightened, the meshing inspection of the gear should be carried out. 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 operated under slight braking are in the direction of the gear tooth height. Not less than 25%, not less than 30% in the length direction of the gear teeth.
(5) The tooth surface of the swing bearing should be cleaned up once for 10 shifts and re-applied with grease.
(6) In order to ensure the reliability of bolt work and avoid insufficient bolt pre-tightening force, the pre-tightening torque of bolts should be checked separately for the first 100 hours and 500 hours after the slewing ring is working. After that, the pre-tightening torque should be checked every 1000 hours of work.
(7) High-strength bolts and nuts are used to connect the bolts and nuts of the slew ring bearing; double nuts are used for tightening and anti-loosening.
(8) When tightening the nut, lubricate the thread of the bolt and the end surface of the nut, and use a torque wrench to tighten it evenly and symmetrically in the circumferential direction. When tightening the last time, the pre-tightening torque on each bolt should be roughly uniform.
(9) 4 oil cups are evenly distributed on the upper surface of the ring gear of the slewing ring that is aligned with the raceway, thereby adding grease to the raceway. Under normal circumstances, the slew ring bearing is lubricated once every 50 hours. Each time you add oil, you must add enough oil until the grease leaks from the seal.
Slewing bearings (also called slewing rings, slewing ring bearings, slew bearings, slew rings, slew ring bearings, swing bearings, turntable bearings) are machine elements that can simultaneously transmit axial and radial forces as well as tilting moments.
LYXQL can produce slewing bearings with outer diameter from 1500mm to 18000mm.
Single row ball slewing ring bearings are usually used for tower cranes, as an important rotating device for tower crane, slewing bearings must always to be checked and maintained timely.
If it is found that the tower crane slewing ring bearing device is out of order, it should be adjusted or repaired in time. Now, the maintenance knowledge of the turntable bearings device of the tower crane will be explained in detail.
(1) The mounting support of the slewing rings must have sufficient rigidity, and the mounting surface must be flat. Before assembling the slew bearings, the contact surface between the support and the slewing ring must be cleaned up during assembly.
(2) During 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 turntable bearing must be hoisted or stored horizontally. Never lift or store vertically to avoid deformation.
(4) Before the bolts are completely tightened, the meshing inspection of the gear should be carried out. 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 operated under slight braking are in the direction of the gear tooth height. Not less than 25%, not less than 30% in the length direction of the gear teeth.
(5) The tooth surface of the swing bearing should be cleaned up once for 10 shifts and re-applied with grease.
(6) In order to ensure the reliability of bolt work and avoid insufficient bolt pre-tightening force, the pre-tightening torque of bolts should be checked separately for the first 100 hours and 500 hours after the slewing ring is working. After that, the pre-tightening torque should be checked every 1000 hours of work.
(7) High-strength bolts and nuts are used to connect the bolts and nuts of the slew ring bearing; double nuts are used for tightening and anti-loosening.
(8) When tightening the nut, lubricate the thread of the bolt and the end surface of the nut, and use a torque wrench to tighten it evenly and symmetrically in the circumferential direction. When tightening the last time, the pre-tightening torque on each bolt should be roughly uniform.
(9) 4 oil cups are evenly distributed on the upper surface of the ring gear of the slewing ring that is aligned with the raceway, thereby adding grease to the raceway. Under normal circumstances, the slew ring bearing is lubricated once every 50 hours. Each time you add oil, you must add enough oil until the grease leaks from the seal.
