Elevator fall buffer device based on magnetorheology

Abstract

The invention provides a magnetorheology based elevator drop buffering device which comprises an elastic damping part, a magnetorheological damping mechanism and a supporting plate, wherein the elastic damping part and the magnetorheological damping mechanism are fixedly arranged on the lower surface of the supporting plate. The magnetorheology based elevator drop buffering device forms a uniform counter-force and uniform buffering deceleration during elevator drop buffering, it can be ensured that the device is always in an effective state, and accordingly injuries brought to passengers in a car are decreased during elevator drop. In addition, the magnetorheology based elevator drop buffering device can be applied to elevators different in operating speed and is good in adaptability.

Description

technical field [0001] The invention relates to an elevator safety device, in particular to a magneto-rheological-based elevator drop buffering device. Background technique [0002] Elevators play an important role in modern life as a transportation device that runs vertically. During the operation of the elevator, due to unpredictable factors, such as traction friction, wire rope elongation, brake system Factors such as insufficient power or failure of the control system may cause the car or the counterweight to exceed the limit position and squat down, resulting in serious safety accidents. [0003] In order to prevent the rigid collision of the elevator car when the squatting phenomenon occurs, elevator buffers will be installed on the ground of the elevator shaft, including car buffers and counterweight buffers. In the prior art, the elevator buffer mainly has oil pressure buffers. Among them, the oil pressure buffer is a kind of energy consumption buffer, which uses th...

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Problems solved by technology

[0002] Elevators play an important role in modern life as a transportation device that runs vertically. During the operation of the elevator, due to unpredictable factors, such as traction friction, wire rope elongation, brake system Insufficient power or failure of the control system and other factors may cause the car or the counterweight to exceed the limit position and squat down, resulting in serious safety accidents

[0003] In order to prevent the rigid collision of the elevator car when the squatting phenomenon occurs, elevator buffers will be installed on the ground of the elevator shaft, including car buffers and counterweight buffers. In the prior art, the elevator buffer mainly has oil pressure buffers. Among them, the oil pressure buffer is a kind of energy consumption buffer, which uses the flow of liquid to generate resistance to play a buffering role; the spring buffer is a kind of energy storage type buffer, which uses the compression of the spring to form a reaction Force, which converts the kinetic energy of the impact into the elastic potential energy of the spring, and then plays a buffering role; although the spring buffer has a simple structure, the spring reaction force gradually increases during the buffering process, and the buffering force and buffering speed appear uneven. Moreover, after the spring is compressed to the limit position, the spring will release the elastic potential energy, and then there will be a rebound phenomenon after the end of the buffer, resulting in poor overall performance of the spring buffer; the structure of the hydraulic oil buffer is complex, and the reaction force generated by the oil discharge resistance It can achieve uniformity, so that the buffer can form a uniform buffer deceleration, and the performance is more reliable. However, the structure of the hydraulic oil buffer is complex and prone to failure, which leads to the failure of the buffer and cannot play a buffering effect. More importantly, , whether it is a spring buffer or a hydraulic oil buffer, it can only be used for elevators with different operating speeds, and the adaptability is poor

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