Air pressure transmitting type magneto-rheological damper

Abstract

The invention relates to an air pressure transmitting type magneto-rheological damper which is an intelligent control device used for reducing the vibration of aerospace, machinery, vehicle or building structure and providing variable damping force. A main part (1) mainly consists of a main part outer cylinder (14), a main part piston (5) and a main part piston rod (17); an accessory (2) mainly consists of a left bent pipe (31), a right bent pipe (3), a damping pipeline (4) with a variable gap and a magnetic coil (19). Cavity bodies at the left and the right sides of the main part piston (5) are respectively communicated and connected with the left bent pipe (31) and the right bent pipe (3) of the accessory, so that an air pressure transmitting channel is formed; the damper can transmit the acting force on the main part and the accessory by the communicated air pressure transmitting channel. The largest force application of the damper can be regulated by changing the number of windingsof the magnetic coil, the sorts of magneto-rheological fluid as well as the length and the interior diameter of the damping pipeline to meet the requirements of design, thus a great deal of the magneto-rheological fluid is avoided being used too much, the construction cost of the damper can be greatly reduced, and the leaking problem of the damper can be solved.

Description

technical field [0001] The present invention is a damper for structural vibration reduction (shock) of aerospace, machinery, vehicle or civil construction, especially a magnetorheological intelligent damper that can provide variable damping and variable stiffness. Background technique [0002] Reducing vibration of structures widely present in aerospace, machinery, vehicles, and civil engineering is a very important area of ​​research. Excessive vibration responses can lead to structures that are unusable, uncomfortable for carrying passengers, or even structural failure or catastrophic consequences. The use of structural vibration control technology (ie, adding various control devices to the structure) to reduce the vibration response of the structure is one of the most commonly used technologies. At present, structural vibration control devices are divided into three control modes: passive control, active control and semi-active control. Among them, the development of pas...

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Problems solved by technology

[0004] The current magnetorheological damper adopts the method of filling the outer cylinder and the cavity surrounded by the piston with magnetorheological fluid. When the piston rod reciprocates, the magnetorheological fluid is prone to leakage

The practice of filling the outer cylinder and the cavity surrounded by the piston at the same time requires a large amount of magnetorheological fluid, which is expensive, and this has always been one of the bottlenecks that plague the wide application of magnetorheological dampers.

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