Permanent magnet synchronous traction machine for elevator

Abstract

The invention discloses a permanent magnet synchronous traction machine for an elevator, wherein a traction wheel and a brake wheel are connected to a main shaft, and the traction wheel, the brake wheel and the main shaft are synchronously rotated. In this way, through the main shaft, stable torque transmission is realized between the brake wheel and the traction wheel, and stable start-stop operation of the traction wheel is realized. Because the brake wheel is equipped with an oil removal groove at a side towards the bottom of a holding tank and the oil removal groove is disposed in the circumferential direction of the main shaft, the oil removal groove is located between the main shaft and a brake surface and cuts off the flow of oil stain between the main shaft and the brake face. Whena sealing structure on the permanent magnet synchronous traction machine for the elevator fails to operate and leaks oil, the oil stain can flow into the oil removal groove along the inner surfaces of the main shaft and the brake wheel, and loses the power continuously flowing along the inner surface of the brake wheel under the storage effect of the oil removal groove. Thus, the oil stain is effectively prevented from flowing onto the brake surface along the inner surface of the brake wheel under the condition of oil leakage, and the stable output of braking torque is greatly ensured.

Description

technical field [0001] The invention relates to the technical field of traction machines, in particular to a permanent magnet synchronous traction machine for elevators. Background technique [0002] Permanent magnet synchronous traction machine, also known as gearless drive, is used to install in the elevator machine room or in the elevator shaft, generally on the top floor of the building or inside the shaft, and is the power device of the elevator. Permanent magnet synchronous traction machine, the main engine directly drives the sheave, without gear box device. With the rapid development of the elevator market, the application of permanent magnet synchronous traction machines is increasing, accounting for more than 70% of all elevator traction machines. [0003] At present, most of the traction machines in the industry have insufficient oil leakage prevention structure design and structural matching. During the long-term operation of the main shaft, there is a risk of o...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the traction machines in the industry have insufficient oil leakage prevention structure design and structural matching. During the long-term operation of the main shaft, there is a risk of oil leakage.

With the rotation of the main shaft and the brake wheel, the leaked oil will flow along the surface of the brake wheel, making it difficult to keep the braking surface of the traction machine clean

However, once there is oil on the braking surface, the braking torque will be insufficient, which poses a serious safety hazard to the operation of the traction machine

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