Method and device for elevator car buffer braking under unsatisfactory stagnation conditions

Abstract

The invention relates to an elevator car buffer braking method and device not meeting a retention working condition. The method includes the steps that an elevator buffer and a motion detecting switch are arranged on the top of an elevator well, wherein the motion detecting switch is used for detecting whether the elevator buffer acts; a buffer collision plate is arranged on the top of an elevator car, a wiring loop of the motion detecting switch is connected with a main drive loop of a traction motor, when running of the elevator car does not meet the safe retention working condition, the buffer collision plate will slowly strike the elevator buffer, the upward movement of the elevator car is blocked, the elevator car is slowly stopped through braking, and an elevator is in the safe retention working condition. According to the elevator car buffer braking method and device, the danger that the elevator car of a traditional elevator continues to move upward and strikes the top of the elevator well when the traditional elevator can not meet the retention working condition of the elevator car is eliminated, the possibility that a top collision accident happens to the elevator car is avoided, and the safety of equipment and staff is protected; meanwhile, according to the technical scheme, the traction motor does not need to be replaced by a traction machine with larger load-bearing capacity, and the technical base and guarantee for further light-weight trend of the design of the elevator car are provided.

Description

technical field [0001] The invention relates to a buffer braking method for an elevator car and a device using the method. The method and the device are suitable for protection against rushing to the top when the elevator car is driven to the top of a hoistway and the stagnation working condition is not satisfied. Background technique [0002] At present, most elevators are driven by traction, that is, friction drive. The principle is: the steel wire rope goes around the traction sheave, and the elevator car and the elevator counterweight are suspended by the steel wire rope on both sides of the traction sheave. The gravity of the counterweight and the transmission of the wire rope will generate pressure on the traction sheave, thereby forming a large enough friction force. When the traction sheave rotates, the suspended steel wire rope moves up and down due to a large friction force, so that the elevator car runs up and down. When the elevator car suspended on one side goe...

AI Technical Summary

Problems solved by technology

The conventional measure is to increase the weight of the car so that T 1 with T 2 Ratio T 1 / T 2 ≥e fα , to meet the stranded working condition, but this problem arises, the self-weight of the car will inevitably increase the self-weight of the counterweight, and the shaft load of the traction motor will inevitably increase. At this time, the load capacity of the traction machine must be calculated. If the calculated actual load is greater than the rated load of the motor, it is necessary to re-select and replace it with a traction machine with a greater carrying capacity, which will cause two disadvantages: (1) Waste of power and energy, or it may be the standard of a traction machine with a greater carrying capacity The product is not available, it needs to be made by non-calibration

Images