Detecting method for braking torque of elevator brake

Abstract

The invention discloses a detecting method for a braking torque of an elevator brake. When an elevator is idle, the operation time and the operation times are judged; when one of the two reaches a detecting threshold, the detecting function for the braking torque of the brake is automatically started, so that the torque current is applied to a traction motor after an elevator car is operated to a top floor; the range of the braking torque is detected according to the torque current applied to the traction motor and the movement condition of the traction motor; and a corresponding alarm is given. The detecting method for the braking toque can timely detect the fault of the brake, improves the pre-judgment capacity to the fault of the brake, and can effectively prevent the accidents caused by insufficient braking torque of the brake; the elevator is operated to the top floor in detection, so that the elevator is prevented from generating severe collision accidents when the detection is unsuccessful; and the detecting method is performed without needing to change a hardware structure of an existing elevator control system, so that the reduction of the implementation cost is facilitated, and the promotion is convenient.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a method for detecting braking torque of an elevator brake. Background technique [0002] The elevator is one of the most commonly used means of transportation in today's society. Its high safety is mainly due to the many safety devices on the elevator. The brake of the traction motor is the most important safety protection device for the traction elevator, and it is also the most frequent action on the elevator. In the event of a fall or rush to the top, the brake is also the first line of safety defense, so the braking performance of the brake directly affects the safety performance of an elevator machine. [0003] Two-way thrust elevator brake is a friction brake that generates two-way electromagnetic thrust when energized to separate the brake mechanism from the rotating part of the traction motor. When the power is turned off, the electromagnetic force disappears. It is m...

AI Technical Summary

Problems solved by technology

[0005] In the existing elevator control system, the lift and fall of the brake shoe are detected through the feedback signal of the travel switch of the brake, and it is impossible to detect whether the braking torque of the brake meets the requirements.

As the service life of the elevator increases, the brake shoes of the brake will increase the gap between the brake and the traction sheave due to wear, resulting in insufficient braking force of the brake, which may easily lead to safety accidents

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