High-altitude slow-descent device based on magnetorheological fluid damper

Abstract

The invention relates to a high-altitude slow-descent device based on a magnetorheological fluid damper. The winch is connected with a permanent magnet DC generator through a gear transmission group, and the permanent magnet DC generator is installed on the rotary magnetorheological fluid damper through a generator bracket. On the top, the rotating magneto-rheological fluid damper provides an adaptive braking torque according to the falling speed of the person or heavy object, so that the person or heavy object keeps falling at a constant speed, and realizes the slow descent of the person or heavy object from high altitude. The device uses the kinetic energy generated when people or heavy objects fall from high altitude, and converts it into electrical energy through a permanent magnet generator, and then supplies the current to the rotary magneto-rheological damper. The excitation coil generates different magnetic field strengths according to the magnitude of the current, so that the fixed The shear stress of the magneto-rheological fluid in the gap between the disk and the rotating disk produces a braking torque, and the braking torque changes with the descending speed of the person or heavy object, realizing the adaptive control of the speed of the descending person or object. The device is suitable for people's self-rescue in high-rise buildings, fire-fighting high-altitude operations, etc., and can improve the efficiency of self-rescue and other rescue.

Description

technical field [0001] The invention relates to a descending device for safely escaping from a high-rise building, in particular to a descending device at high altitude with a 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, but when major accidents such as fire or earthquake occur in high-rise buildings, the people in the buildings are often too late to evacuate, causing heavy casualties event. If some self-rescue equipment can be equipped in the high-rise building, when an emergency occurs, people can choose more ways to escape from the building safely, such as installing a descending device at the window to facilitate personnel to escape from the high-rise. [0003] Existing devices used for escape from tall buildings mainly include friction and hydraulic devices, but friction devices are prone to failure and have poor stability. The hydrau...

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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