Asymmetric magnetorheological damper based on extrusion enhancement effect
A magneto-rheological damper and enhancement effect technology, applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problem of reducing the reliability of the control system, increasing the complexity of the vibration damping system, and increasing the cost, etc. problem, achieve the effect of improving vibration reduction/isolation effect, reducing zero-field damping force, and reducing cost
Active Publication Date: 2019-07-26
CHONGQING UNIV
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Problems solved by technology
However, real-time adjustment requires more sensors and higher requirements for the controller, which not only increases the cost of design and use, but also increases the complexity of the vibration reduction system and reduces the reliability of the control system
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[0011] The asymmetric magneto-rheological damper based on the extrusion enhancement effect in this embodiment includes a cylinder 1, a rotating piston 2 sleeved inside the cylinder in an axially fixed manner, and a ball screw pair matched with the rotating piston, The nut 3 of the ball screw pair is fixedly connected with the rotating piston 2 and rotates synchronously; it also includes a moving piston 4 coaxial with the cylinder, and the rotating piston 2 and the moving piston 4 form a screw transmission member with a rolling body between them, which can Convert the rotary motion of the rotating piston into the linear motion of the moving piston; between the inner wall of the cylinder 1, the outer circle of the rotating piston 2 and the front end of the moving piston 4 is a magnetorheological fluid chamber 5, and the magnetorheological fluid The cavity is a volume-variable cavity and the magnetorheological fluid is inside the cavity.
[0012] The inner wall of the cylinder 1 ...
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The invention discloses an asymmetric magneto-rheological damper based on an extrusion synergistic effect. The asymmetric magneto-rheological damper comprises a ball screw pair, a rotating piston synchronously rotating with a nut of the screw pair, a moving piston, a cylinder barrel and the like; a spiral drive component with a rolling body is formed between the rotating piston and the moving piston, and rotation movement of the rotating piston is converted into linear movement of the moving piston. When a screw of the ball screw pair moves linearly, the nut of the ball screw pair rotates, themoving piston makes linear motion accordingly, and then extrusion on magneto-rheological liquid is increased or decreased; as the magneto-rheological effect can be enhanced when the pressure intensity borne by the magneto-rheological liquid is increased, the magneto-rheological liquid bears different pressure intensities due to the difference of movement directions in case of input of the same speed and current, thus, different compression and restoring forces are caused, asymmetric force is generated accordingly, the sensor cost of a control system (like an automobile suspension system) needing asymmetric force can be reduced advantageously, the energy consumption can be reduced advantageously, and system reliability can be improved advantageously.
Description
technical field [0001] The invention relates to the field of magnetorheological damping, in particular to an asymmetric magnetorheological damper based on the extrusion enhancement effect. Background technique [0002] Magnetorheological fluids are smart fluids that can switch between liquids and semi-solids in milliseconds. The magnetorheological damper with magnetorheological fluid as the medium is usually used to realize the controllable damping. The magnetorheological damper has the advantages of simple structure, fast response speed and less energy consumption than active control. In some application fields, the damper is required to output an asymmetric force, that is, under the same excitation, the damping force of the compression and recovery strokes is different. Usually, in order to make the magneto-rheological damper output the corresponding damping force, it needs to be based on the signals of different sensors. The controller outputs control signals to adjust t...
Claims
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IPC IPC(8): F16F9/53
CPCF16F9/535
Inventor 于建强董小闵汪旭宏李彪李军礼
Owner CHONGQING UNIV