What about the uneven tension of elevator wire rope?

During the regular inspection of the elevator of a unit, during the inspection of the wheel groove of the traction machine and the fixing of the rope end of the traction steel wire rope in the machine room, it was found that the wear of six wheel grooves was inconsistent, and the spring-shaped variable fixed at the rope end was quite different. After checking the steel wire rope, it was found that the diameter met the requirements, but the tension difference between two steel wires reached - 11% and 13%. Remove the rope end fixing device, It is found that plastic deformation occurs between all rubber cushions and some springs.

Possible faults

Uneven tension of the traction wire rope will cause unequal pressure between the traction wheel groove and the traction rope. Long-term operation will cause inconsistent wear, change the pitch diameter of each groove of the traction wheel, and change the movement speed parameters of each wire rope, which may cause the relative sliding of the wire rope in the wheel groove. The wire rope turns into a "file" to file the traction wheel groove, The safety of the elevator is affected by the vicious cycle of the groove, resulting in the deterioration of the safety of the traction wheel.

processing method

Replace the fixed spring, rubber pad and 6 steel wire ropes of the same batch of traction rope in the same factory, adjust the preload and tension difference, carry out the traction capacity verification test, and use them after they are qualified. Pay attention to inspection and maintenance in the next maintenance process to ensure that the traction rope is stressed evenly, and the deviation between the tension and the average value is not more than 5%.