Buffer system for adaptive progressive damping force of elevator

Abstract

The invention discloses an elevator buffer system with adaptive progress damping force, comprising a buffer unit and a magneto-rheological damping unit. The magneto-rheological damping unit comprises a magneto-rheological damping member and a control system. The magneto-rheological damping unit applies damping during compression of buffer springs, thus progressive buffering damping is formed; the parameter of magneto-rheological fluid is adjusted according to ascent parameter of a car; the damping force increases gradually during grounding and buffering of the car; the increasing process is quicker and gentler than that with common springs; finally, buffering damping is formed, and smooth descent buffering and sufficient variable damping are achieved. Compared with the prior art, the elevator buffer system has the advantages that a buffer stroke and a progressive gradient damping process are added, the springs with small elastic coefficient are applicable to the scheme, late variable damping with early elastic buffering is applicable to high-speed elevators, and ready dynamic application is achieved.

Description

technical field [0001] The invention relates to a safety system for special equipment, in particular to a safety system for a van elevator when it hits the bottom. Background technique [0002] The van elevator is a means of transportation for vertical transportation, which is closely related to people's daily life; the existing van elevator is mainly composed of a traction machine, a control cabinet, an elevator car body, guide rails, etc. Downlink; In order to realize uplink and downlink and install related equipment, elevator shafts will be built in buildings or other places where van elevators are used to achieve smooth operation. [0003] The uplink and downlink of van elevators are generally achieved by mechanical traction, and the structure is relatively complex. Due to problems such as the use environment, cycle, equipment aging, and quality, it will cause the elevator car body to fall without constraints or limited constraints, which is relatively complex. serious ...

AI Technical Summary

Problems solved by technology

[0003] The uplink and downlink of van elevators are generally achieved by mechanical traction, and the structure is relatively complex. Due to problems such as the use environment, cycle, equipment aging, and quality, it will cause the elevator car body to fall without constraints or limited constraints, which is relatively complex. serious safety issue

In the prior art, in order to solve the serious danger to the passengers caused by the rigid bottoming of the elevator car body (directly falling to the bottom of the hoistway), a buffer device is installed at the bottom of the hoistway; the buffer device is a hydraulic buffer for high-speed elevators, and generally The structure of the buffer spring is adopted, and this consideration is mainly the relationship between the elastic coefficient of the spring, the stroke and the elevator car body. Therefore, high-speed elevators cannot use springs with a large elastic coefficient, otherwise there will be obvious rigid bottoming feeling. resulting in accidents; the main thing is that the above-mentioned buffer structure is not adaptable according to the whereabouts of the elevator car body, so it cannot be buffered according to the falling situation

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