Evaluation system and method for elevator brake static braking performance

Abstract

The invention relates to an evaluation system and method for elevator brake static braking performance. The evaluation system includes a variable frequency drive device, a reflective photoelectric switch and a control device, wherein the variable frequency drive device is connected to the control device and an elevator system for applying a driving current to control a traction sheave of the elevator system to apply driving torque to a brake of the elevator system; and the reflective photoelectric switch is connected to a reflector arranged on the traction sheave and the control device for detecting rotation of the traction sheave. The system only needs to carry the weight once to complete detection of braking force of multiple elevators with the same type, greatly reduces transportation work before detection, saves time and effort, realizes rapid quantitative high-precision detection on site, improves efficiency of inspection and detection, and solves industry difficult problems in the field.

Description

technical field [0001] The invention belongs to the technical field of elevator detection, and in particular relates to a static braking performance evaluation system and method of an elevator brake. Background technique [0002] The brake is one of the important safety components to ensure the normal operation of the elevator and its frequent movements. Whether the elevator can run safely is closely related to the working condition of the brake. A large number of accident cases show that one of the main reasons for elevator personal casualties is improper setting of the brake braking force, which leads to serious accidents such as shearing, topping, squatting, sliding, out of control at the landing, and impact of the elevator. However, compared with elevator safety components such as door locks and safety gears, the design and inspection regulations for brakes in standard specifications are not comprehensive and detailed enough. The unexpected movement of the car due to in...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly the following problems in the detection of the braking performance of elevator brakes: for the detection of multiple elevators of the same type in a certain area, each time an elevator is detected, it is necessary to carry a weight, and the detection method of frequently carrying weights is time-consuming and laborious Inconvenient; there is a certain deviation between the assumed conditions calculated by the braking distance reverse braking force method and the actual situation, resulting in the calculation error of the braking force; the method of testing the braking force through the torque wrench is only for the test of the static braking force, but the detection accuracy is low , and limited by the size of the machine room, it is sometimes difficult to implement; the method of unilaterally releasing the brake to test the braking performance of the other side to see whether the brake wheel can be reliably braked is a qualitative test, and the actual quantitative data of the brake cannot be obtained

Images