Traction structure of freight elevator based on 6 to 1 suspension way

Abstract

The invention discloses a traction structure of a freight elevator based on 6 to 1 suspension way. The traction structure comprises an elevator cabin, an elevator cabin suspension sheave group, an elevator cabin guiding wheel group, a counterweight, a counterweight suspension sheave group, a counterweight guiding wheel group, and a traction machine which is arranged in a machine room, wherein theelevator cabin suspension sheave group comprises a first pair of elevator cabin suspension sheave, a second pair of elevator cabin suspension sheave and a third pair of elevator cabin suspension sheave, and the first pair of elevator cabin suspension sheave, the second pair of elevator cabin suspension sheave and the third pair of elevator cabin suspension sheave are separately composed of at least two elevator cabin suspension sheaves which are rotatably arranged on the top of the elevator cabin; the elevator cabin guiding wheel group comprises a first pair of elevator cabin guiding wheel group and a second pair of elevator cabin guiding wheel group, and the first pair of elevator cabin guiding wheel group and the second pair of elevator cabin guiding wheel group are separately composed of at least two elevator cabin guiding wheels; one end of a steel rope is fixed to a counterweight rope head, bypasses the first counterweight suspension sheave, one counterweight guiding wheel, the second counterweight suspension sheave, another counterweight guiding wheel, the third counterweight suspension sheave, the traction machine, the first pair of elevator cabin suspension sheave, the first elevator cabin guiding wheel, the second pair of elevator cabin guiding wheel and the third pair of elevator cabin suspension sheaves, and then is fixed to the elevator cabin rope head.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a freight elevator traction structure based on a 6:1 suspension mode. Background technique [0002] Since the permanent magnet synchronous traction machine is widely used in modern elevators, the permanent magnet synchronous traction machine is superior to the traditional worm gear traction machine in terms of manufacturing cost, energy saving, and maintenance convenience. However, the torque of the permanent magnet synchronous traction machine is smaller than that of the worm gear traction machine. If it reaches the high torque of the worm gear traction machine, the cost of the permanent magnet synchronous traction machine will be very high, so now it is popular to use the method of increasing the suspension ratio. It is a scheme to increase the linear velocity of the elevator wire rope and reduce the tension of the wire rope, thereby reducing the torque of the traction machin...

AI Technical Summary

Problems solved by technology

[0003] The traditional traction elevator with 6:1 suspension method has the following layout due to the layout of anti-rope pulley and guide pulley figure 2 As shown, the main problem is that the lifting force of the steel wire on the car is not uniform enough, and the stress is easily concentrated.

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