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Braking torque self-monitoring method for traction machine of traction-driven elevator

A technology of elevator traction and dynamic torque, which is applied in the direction of elevators, transportation and packaging, etc., can solve the problems of inability to represent, reduce the safety of brakes, etc., and achieve the effect of ensuring the safety of use

Active Publication Date: 2021-02-02
NEIJING QUALITY & TECH SUPERVISION BUREAU +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the above braking force verification method only verifies the braking force when the elevator is stationary, the data obtained at this time cannot represent that the braking torque can still meet the safety requirements when the car unexpectedly moves.
[0004] Since the static friction force between the brake shoe and the brake wheel is always greater than the sliding friction force, when performing the braking force monitoring test, only considering the static friction force will reduce the safety of the brake

Method used

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  • Braking torque self-monitoring method for traction machine of traction-driven elevator

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A traction-driven elevator traction braking torque self-monitoring method specifically includes the following steps:

[0042] S1. Input the initial data in the system, including the proposed test speed of the elevator, the rated voltage when the brake is lifted, the brake holding voltage, the radius of the traction sheave, and the final allowable maximum braking distance;

[0043] S2. The elevator frequency converter performs appropriate power output to the traction machine, and at the same time inputs rated voltage to the brake to lift the brake. After the elevator gradually reaches the set speed, the frequency converter stops outputting power to the traction machine;

[0044] S3. After the frequency converter stops outputting power to the traction machine, the brake should be braked immediately, and the test voltage should be input to the brake while braking. This voltage is used to resist the spring torque of the normally closed brake; The following information shoul...

Embodiment 2

[0052] See attached figure 1 , the embodiment of the present invention provides a traction-driven elevator traction machine torque self-monitoring method, which specifically includes the following steps:

[0053] S1. Input the initial data in the system, including the proposed test speed of the elevator, the rated voltage when the brake is lifted, the brake holding voltage, the radius of the traction sheave, and the final allowable maximum braking distance;

[0054] S2. The elevator frequency converter performs appropriate power output to the traction machine, and at the same time inputs rated voltage to the brake to lift the brake. After the elevator gradually reaches the set speed, the frequency converter stops outputting power to the traction machine;

[0055] S3. After the frequency converter stops outputting power to the traction machine, the brake should be braked immediately, and the test voltage should be input to the brake while braking. This voltage is used to resist...

Embodiment 3

[0060] A traction-driven elevator traction braking torque self-monitoring method specifically includes the following steps:

[0061] S1. Input initial data: test speed v, rated voltage V when the brake is lifted e , Brake holding voltage V b , traction sheave radius r, maximum allowable braking distance S max ;

[0062] S2. The elevator frequency converter conducts appropriate power output to the traction machine, and at the same time inputs the rated voltage V to the brake 0 Lift the brake, and after the elevator gradually reaches the set speed v, the frequency converter stops outputting power to the traction machine;

[0063] S3, the voltage input to the brake becomes V i , the collected information includes: the time t it takes for the traction machine to continue to rotate until it stops completely i , at time t i The radian R that the inner traction machine has rotated i , Synchronously calculate the real-time braking distance S of the elevator during this test i ...

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Abstract

The invention relates to the technical field of traction machine brakes of traction-driven elevators, and discloses a braking torque self-monitoring method for a traction machine of a traction-drivenelevator. The braking torque self-monitoring method for the traction machine of the traction-driven elevator comprises the following steps: judging the initial state of the elevator by inputting proposed initial data; applying an initial voltage to a to-be-tested brake, and meanwhile, gradually controlling the traction machine of the elevator to operate at a set speed; stopping power output to thetraction machine, and applying a test voltage to the brake at the same time; obtaining a braking distance from the beginning of the application of the test voltage to the brake to the complete stop of the traction machine through a rotary encoder of the traction machine; and repeatedly detecting the braking distance by changing the test voltage value to judge the braking condition. The braking torque self-monitoring method for the traction machine of the traction-driven elevator has the following beneficial effects: the actual working state of the brake is considered, and the braking performance of the brake can be dynamically tested; and only an existing system needs to be set, no new device needs to be additionally arranged, and the method is simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of elevator detection, in particular to a method for self-monitoring the traction braking torque of a traction-driven elevator. Background technique [0002] Requirements in 9.11.3 of No. 1 Amendment of "Safety Code for Elevator Manufacturing and Installation" (GB7588-2003): For those who only use the verification of braking force, the braking force self-monitoring period should not exceed 24h. When the elevator is running normally, the brake is only released when the elevator running speed drops to the minimum (commonly known as "zero speed brake"). At this time, there is static friction between the brake shoe and the brake wheel; the running elevator In the event of a failure, the brake is released after the safety circuit is disconnected, and then the elevator is gradually decelerated by the sliding friction between the brake shoe and the brake wheel. After the elevator stops, there is a static friction f...

Claims

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Application Information

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IPC IPC(8): B66B5/00
CPCB66B5/0031
Inventor 吴晓军邓林郑灵饶庆华
Owner NEIJING QUALITY & TECH SUPERVISION BUREAU