Elevator braking torque detection method and detection device

Abstract

The embodiment of the invention discloses an elevator braking torque detection method and detection device. The method comprises the following steps that a data processing unit acquires detection data, wherein the detection data comprises a difference value (W1-W2) between an elevator counterweight weight W1 and a car weight W2, the torque M1 required at the static state of an elevator, torque Mxrequired at movement of an elevator car, a maximum acceleration value a1 of the elevator when a brake is opened in the power-off state of a traction machine, and a maximum acceleration value a2 of theelevator in deceleration stop process when the brake is closed; and the data processing unit judges whether the elevator braking torque is qualified or not according to the rated load capacity Q of the elevator and the detection data. Namely, the detection method used in the embodiment of the elevator braking torque detection method and the device is simple and safe, does not need to use a weight, and saves time and labor.

Description

technical field [0001] The invention relates to the technical field of elevator detection, in particular to an elevator braking torque detection method and detection device. Background technique [0002] The elevator traction machine brake is an extremely important safety component of the elevator. Whether its working status is normal or not is directly related to the safety and reliability of the elevator. Insufficient braking torque will cause the elevator to slide, open the door and walk on the ladder, rush to the top and squat to the bottom, etc., which will cause passengers to be cut and hit, resulting in serious personal injury or death accidents. For example, in recent years, the intern nurses of Shenzhen Pengcheng Hospital were trapped and died while taking the elevator, and the passenger fatal accidents such as "eating people" in the elevator of Hangzhou Xinhuafang were all caused by the failure of the elevator brake. In order to learn the painful lessons of the ac...

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Problems solved by technology

[0003] The above method requires the use of a large number of weights and other heavy objects, time-consuming and labor-intensive handling, high test costs, and unbearable for some owners, and the car is loaded with 125% of the rated load, which is an overload condition, and the following risks will also be faced during the test: 1 1. It may lead to structural deformation of the car; 2. It may cause the head of the traction wire rope to loosen, and the car and the counterweight will fall freely; 3. If the braking torque is insufficient during the test, the elevator will fall out of control; 4. Due to the Overload and heavy load impact may lead to misoperation damage of safety gear, deformation and damage of guide rail, and overload damage to main engine and electrical equipment, etc.

The above risks often lead to disputes over liability for equipment loss, which makes the "125% rated load braking test" face many difficulties and cannot be carried out smoothly. The braking capacity (torque) of the brake cannot be verified, and the safety of the elevator is difficult to guarantee.

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