Measurement method for braking force of elevator brake
A technology for elevator brakes and measurement methods, applied in force/torque/power measuring instruments, instruments, measuring devices, etc., can solve problems such as complexity, reduced accuracy of weighing devices, and difficulty in accurately monitoring braking force, to ensure accuracy Effect
Active Publication Date: 2016-02-10
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] like 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 ele...
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The invention discloses a measurement method for a braking force of an elevator brake. The measurement method comprises the following steps of firstly, releasing all brakes, controlling a traction motor to positioned at zero speed in a no-working state, and measuring current of the traction motor; secondly, calculating an unbalanced force between the elevator car and a counterweight according to a measured current value; thirdly, calculating an output force which is required for driving the traction motor and is used for measuring all or part of braking force according to all or part of measured and required braking force of the brake and the calculated unbalanced force; fourthly, enabling internal contracting brake of the brake to drive the traction motor by using the output force; fifthly, detecting whether the elevator car moves or not; if the movement of the elevator car is detected, judging the determined braking force of the brake to be insufficient. According to the measurement method disclosed by the invention, the measurement accuracy of the elevator braking force can be guaranteed to the maximum extent; in addition, no matter the elevator is positioned in any state, the detection of the braking force can be performed, and a detection function of the elevator braking force is enabled to be performed at fixed time.
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...
Claims
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IPC IPC(8): B66B5/00G01L5/28
Inventor 刘玉兵方凯
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD