With the natural escalator suppliers of the traction wire rope, the force of each rope is different, and the tension deviation of each traction wire rope (generally 4 to 7) will exceed 5%, which is out of tolerance. As the operating time of the newly installed elevator increases, the wire rope will naturally extend. Theoretically, the elongation of the traction wire rope is about 0.5%. For general low-rise elevators in Guizhou, Guiyang, the impact is not too great, but for high-rise elevators, especially the 2:1 suspension elevators, the impact cannot be ignored. For example: a passenger elevator on the 15th floor, the traction wire rope length is about 50m, such as 2:1 suspension, the rope length is about 100m, and its 0.5% elongation is as much as 500mm. We know that the buffer distance of the hydraulic buffer is 200-350mm, and the buffer distance of the spring buffer is 150-400mm. With the natural elongation of the traction wire rope, the leveling accuracy will change. Some elevators can automatically level again, but most elevators require *maintenance workers to re-adjust the leveling accuracy to meet GBl0060-93 leveling accuracy As a result, the elongation of the traction wire rope will inevitably extend to the counterweight side, causing the counterweight side buffer distance to become smaller and smaller.In the end, the buffer distance may be too small and out of tolerance, or even in severe cases. The counterweight had slipped onto the buffer before the elevator was leveled, causing an elevator failure. Handling opinions: ①When installing, the buffer distance on the heavy side should be as close as possible to the upper limit, and once the traction wire rope is extended, it can be compensated by itself; ②The adjustment nut of the traction wire rope head plate should be left about 100mm during installation. Adjust the margin for the maintenance workers to adjust; ③
