A Combined Shock Absorber Based on Magnetorheological Damper

Abstract

The invention discloses a novel combined shock absorber based on a magnetorheological damper. The novel combined shock absorber comprises steel wire rope shock absorbers, an upper clamping plate, a lower clamping plate, the magnetorheological damper, a metal spring and an adjustable limiting device. The metal spring is installed at the lower end of the magnetorheological damper. The magnetorheological damper comprises a cylinder with a containing cavity formed inside, a rotating shaft, a cavity inner frame, a limiting spring and electromagnetic coils. The limiting device comprises a circular limiting disc, circular-arc-shaped clamping bars and a limiting column. The novel combined shock absorber can bear vertical and torsional vibration loads and has the function of limiting the rotation angle. When the novel combined shock absorber bears different vibration loads, different parts of the novel combined shock absorber work. The multiple electromagnetic coils can be installed, damping force is greatly increased on the premise of guaranteeing that the boundary dimension and the field current of the damper are not increased, large torque can be output under the condition that the torsion angle is limited, requirements of a high-speed impact and low-speed vibration system can be met, and thus the novel combined shock absorber can adapt to vehicle-mounted antenna radars, airborne seats, vehicle-mounted suspensions and other devices with small torsion angles.

Description

technical field [0001] The invention relates to the technical field of shock absorbers, in particular to a magneto-rheological damper based on a combination of a steel wire rope shock absorber and a magnetorheological damper, which can withstand vertical and torsional vibration loads and has the function of limiting the size of the rotation angle. combined shock absorbers. Background technique [0002] Magnetorheological fluid changes from Newtonian fluid to solid state within millisecond response time under the action of magnetic field strength, and the change process is continuous and reversible. Its working principle is: magnetorheological fluid is mainly composed of polar ions, carrier fluid and stabilizer. The magnetorheological fluid is a Newtonian fluid when it is not subjected to the magnetic field. After receiving the magnetic field strength, the polar ions are subjected to the magnetic field to generate a dipole moment, and form a chain structure parallel to the e...

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Problems solved by technology

At the same time, some wire rope shock absorbers also have space three-way limit devices, which meet the vibration isolation requirements of specific limit requirements in the engineering field, but there are still the following disadvantages: when the vibration damper is actually working, it will be affected by vibration and shock. , unbalanced load, uneven road surface when the vehicle is running, etc. cause the torsional vibration of the damping device, which affects the normal and stable operation of the equipment

However, there are still the following disadvantages: (1) The rotary damper can rotate 360°, and it is not suitable for occasions where the vibration amplitude is not large, such as car seats, suspensions, and clutch torsional damping, where the torsional angle is limited; ( 2) When the torsion angle is small, no matter the single-piece or multi-piece rotary damper, the output damping force is limited, and it cannot output a large torque to suppress the vibration; (3) The magnetorheological damper in the magnetorheological damper Low fluid utilization, increasing the cost of the magneto-rheological damper and its semi-active control system

However, the metal spring steel wire rope liquid damping vibration isolator still has the following problems: when the vibration damping device is actually working, it will cause the torsion of the vibration damping device due to vibration shock, unbalanced load, and uneven road surface when the vehicle is running. Vibration, thus affecting the normal and stable operation of the equipment

But the magnetorheological torsional damper has the following problems: (1) the number of electromagnetic coils is limited and cannot produce a large torque

(2) During actual work, the instrument is subjected to vertical vibration shock, which cannot effectively reduce vibration

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