Method for determination of braking force of elevator brakes
A technology for elevator brakes and measuring methods, which is applied to force/torque/work measuring instruments, instruments, measuring devices, etc., can solve the problems of complex and easy misjudgment of whether the car is in an no-load condition, and difficult to accurately monitor the braking force, etc. To achieve the effect of guaranteed accuracy
Active Publication Date: 2017-11-24
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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Problems solved by technology
However, the site conditions of the elevator are complicated, for example, the accuracy of the weighing device is reduced, and it is easy to misjudge whether the car is in an empty state; the customer decorates the car and the elevator balance coefficient changes, making the invention based on the first set of inspection weight. The value of the torque will vary, making it difficult to accurately monitor the braking force, and the effective implementation of this patent is difficult to succeed
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[0019] In order to make the principles and features of the present invention easier to understand, the present invention will be further described below in conjunction with specific embodiments.
[0020] Such as figure 1 Shown, adopt the measuring method of elevator brake braking force of the present invention to measure all brakes of elevator, comprise the following steps:
[0021] In step 100, a certain time has passed after the last measurement, and the elevator is in the door-closed standby state; the embodiment is illustrated at a certain time interval; the time can be based on a clock device or a timer of the elevator control system, and the interval can be every 24 hours Carry out once; Of course, this embodiment also can be carried out by the number of times of starting of elevator, such as the elevator carries out a braking force measurement after every 300 times of starting and running;
[0022] The elevator is in the door-closed standby state, which means that the ...
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The invention discloses a method for measuring the braking force of an elevator brake, which comprises the following steps: first, release all the brakes, control the traction motor to stop running at zero speed, and measure the current of the traction motor; second step, according to the measured The current value calculates the unbalanced force between the elevator car and the counterweight; in the third step, according to the measured braking force of all or part of the brakes and the previously calculated unbalanced force, calculate the Part of the braking force needs to drive the output force of the traction motor; the fourth step is to make the measured brake lock and drive the traction motor with the aforementioned output force; the fifth step is to detect whether the elevator car is moving; if the elevator car is detected If the cabin moves, it is judged that the braking force of the measured brake is insufficient. The invention can ensure the accuracy of measuring the braking force of the elevator to the greatest extent, and can detect the braking force no matter what state the elevator is in, so as to ensure that the detection function of the braking force of the elevator is carried out regularly as required.
Description
technical field [0001] The invention relates to a method for measuring an elevator, in particular to a method for measuring the braking force of an elevator brake. Background technique [0002] In the existing elevator, the elevator brake bears a very important responsibility. When the elevator stops normally or has a serious failure, the traction motor is stopped through the brake to ensure that the elevator car does not move and the passengers entering and leaving the car safety. No matter how redundant the form is, as the execution part of the elevator stop, the brake must provide sufficient braking force. GB7588-2003 stipulates that when the car is loaded with 125% of the rated load and running downwards at the rated speed, operating the brake should be able to stop the traction machine. But in fact, most of the elevators currently cannot realize the self-monitoring of the braking force. If the validity of the braking force cannot be confirmed during the routine mainte...
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IPC IPC(8): B66B5/00G01L5/28
Inventor 刘玉兵方凯
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD