Elevator brake friction torque testing method

Abstract

The invention discloses an elevator brake friction torque testing method. The method comprises the steps that the diameter D of a traction wheel and the distance d of a traction steel rope from a wheel edge are measured; the mass m1 of a lift car and the mass m2 of a counter weight are measured through a weighing device; an acceleration sensor and a corresponding data collection device are arranged on the lift car of an elevator; the acceleration sensor and the corresponding data collection device are arranged on the lift car, and different accelerated velocities under emergency braking of the elevator are measured under different rated loads of the elevator; according to the theorem of moment of momentum, the elevator braking process is analyzed, an elevator brake friction torque equation is obtained, and the rotational inertia of an elevator braking wheel and the elevator brake friction torque are solved; finally checkout is conducted. The friction torque output by the brake under the condition of emergency braking is studied from the mechanical perspective, the method can provide parameters for the design of the brake, and a reference can be provided for the performance evaluation and the relevant standards of the brake.

Description

technical field [0001] The invention relates to the technical field of elevator brakes, in particular to a method for testing elevator brake friction torque. Background technique [0002] The elevator braking system is an important part to ensure the safe operation of the elevator. Most of the operation control and safety protection of the elevator ultimately depends on the action of the braking system to stop the elevator and ensure the safety of the elevator. If the braking torque of the brake is insufficient, the braking mechanism is stuck, the control system is electrically stuck, and the balance coefficient is too small, the braking safety function of the brake will fail, which will often lead to vicious accidents such as the elevator falling, rushing to the top, and shearing. Safety brings unacceptable risks and poses a huge threat to the safety of passengers' lives and properties. [0003] At present, in the research on elevators at home and abroad, there is no effec...

AI Technical Summary

Problems solved by technology

If the braking torque of the brake is insufficient, the braking mechanism is stuck, the control system is electrically stuck, and the balance coefficient is too small, the braking safety function of the brake will fail, which will often lead to vicious accidents such as the elevator falling, rushing to the top, and shearing. Safety brings unacceptable risks and poses a huge threat to the safety of passengers' lives and property

[0003] At present, in the research on elevators at home and abroad, there is no effective test method for the friction force of elevator brakes.

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