Buffer device for composite damping force of elevator

Abstract

The invention discloses a buffer device for a composite damping force of an elevator. The buffer device comprises a buffer component and a magneto-rheological damping component which can be connected with the buffer component in a forward direction and a reverse direction and forms damping. By combining variable forward damping intervention at the later buffer stage of abnormal falling of an elevator car with elastic buffer at the earlier stage, the buffer device disclosed by the invention is suitable for high-speed elevators, and has an effect of being dynamically applied at any time, so that the comfortability and the reliability before the elevator car touches the bottom and at the moment when the elevator car touches the buffer component are effectively improved; meanwhile, before the buffer when the car touches the bottom is finished, the connection of the damping component is restored to play a role in limiting the speed of resilience, and steady resilience is ensured; parameters of magneto-rheological fluid are adjusted according to falling parameters of the elevator car, and if the falling speed is high, a bigger resilience force can be caused, and the power-on current of the magneto-rheological fluid is intensified so as to increase the restored damping force; meanwhile, during damping restoration, the viscosity of the magneto-rheological fluid can also be adjusted so as to ensure the resilience to be steady and slow.

Description

Technical field [0001] The invention relates to a safety system for special equipment, and the special equipment relates to a safety system for bottoming out of a van elevator. Background technique [0002] Van elevator is a vehicle that solves vertical transportation and is closely related to people's daily life; the existing van elevator is mainly composed of traction machine, control cabinet, car, guide rail, etc., and realizes relatively rapid up and down ; In order to achieve up and down 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 upward and downward movement of the van elevator is generally realized by mechanical traction, and the structure is relatively complicated. Due to the use environment, cycle, equipment aging, quality and other issues, the elevator car will fall without restraint or limited restraint, which has serious problems. Security issues. In th...

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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 to fall without restraint or limited restraint, which is more serious. security issues

In the prior art, in order to solve the serious danger to the passengers caused by the car rigidly touching the bottom (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 adopts The structure of the buffer spring, and this consideration is mainly the relationship between the elastic coefficient of the spring, the stroke and the car. If the elastic force is too large, it will have a greater rebound force and cause greater damage. Therefore, high-speed elevators cannot A spring with a large elastic coefficient is used; in fact, for high-speed elevators, due to the high speed and the effect of gravity, the buffering of the hydraulic buffer is relatively slow, and serious rigid collisions will still occur, resulting in accidents; at the same time, For elevators with high speed and heavy load, the use of springs with large elastic coefficients will make the spring load too large, and it does not have the characteristics of adjusting at any time, and it cannot adapt to the whereabouts of the elevator car body, so it cannot Buffer in case of falling

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