Upper air slow descending device based on magnetorheological fluid damper

Abstract

The invention relates to an upper air slow descending device based on a magnetorheological fluid damper. A winch is connected with permanent magnet direct-current generators through a gear transmission set. The permanent magnet direct-current generators are installed on the rotary magnetorheological fluid damper through a generator support. The matched braking torque is provided through the rotary magnetorheological fluid damper according to the descending speed of a person or a heavy object, so that the person or the heavy object descends at a constant speed, and upper air slow descent of the person or the heavy object is achieved. By the adoption of the upper air slow descending device, kinetic energy generated in the descending process of the person or the heavy object descending from the upper air is used and converted into electric energy through the permanent magnet direct-current generators, and the electric current is then supplied to the rotary magnetorheological fluid damper; and the different degrees of magnetic field intensity are generated by excitation coils according to the electric current, the braking torque is generated by magnetorheological fluid shearing stress in gaps between a fixed disc and rotary discs, the braking torque is correspondingly changed along with the descending speed of the person or the heavy object, and the self-adaptive control over the person or the heavy object is achieved. The upper air slow descending device is suitable for personnel self-rescue, upper air fire protection operation and the like and the self-rescue and other-people-rescue efficiency can be improved.

Description

technical field [0001] The invention relates to a descending device for safely escaping from high-rise buildings, in particular to a descending device with damping function. Background technique [0002] With the acceleration of urbanization, more and more high-rise office buildings and residential buildings appear in front of people. However, when a major accident such as a fire or an earthquake occurs in a high-rise building, the people in the building are often too late to evacuate, causing heavy casualties. event. If high-rise buildings can be equipped with some self-rescue equipment, when an emergency occurs, people can choose more ways to escape the building safely. [0003] Existing devices for the slow-down and escape of high-rise buildings mainly include friction type, hydraulic type, etc., but the friction type friction device is easy to fail and has poor stability. Hydraulic type generally uses hydraulic damping to balance the gravity of the person falling, and ...

AI Technical Summary

Problems solved by technology

[0003] Existing devices used for escape from tall buildings mainly include friction and hydraulic devices, but friction devices are prone to failure and poor stability

Hydraulics generally use hydraulic damping to balance the gravity of the person falling, and the volume of the internal hydraulic oil will change, resulting in empty travel or jamming, which reduces the stability of the device

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