Variable-stiffness torsional vibration absorber with magneto-rheological elastomers

Abstract

The invention discloses a variable-stiffness torsional vibration absorber with magneto-rheological elastomers. The variable-stiffness torsional vibration absorber comprises a connecting disc, a transmission shaft is arranged in the middle of the connecting disc, a plurality of fan-shaped magneto-rheological vibration absorption assemblies are evenly arranged on the outer edge of the connecting disc, the outer edges of the fan-shaped magneto-rheological vibration absorption assemblies are fixedly connected through annular clamping plates, each fan-shaped magneto-rheological vibration absorption assembly is sequentially connected with a corresponding power source, a corresponding controller and a corresponding acceleration sensor through corresponding wires, the magneto-rheological elastomers are arranged in the fan-shaped magneto-rheological vibration absorption assemblies, the acceleration sensors are installed at the input end of the transmission shaft, and the controllers are used for processing frequency signals collected by the acceleration sensors and calculating and controlling current transmitted into the fan-shaped magneto-rheological vibration absorption assemblies by the power sources. According to the variable-stiffness torsional vibration absorber with magneto-rheological elastomers, torsional vibration of a power transmission system is reduced by utilizing a dynamic tuning vibration absorption principle, the problems that an existing passive type torsional vibration damper is narrow in working frequency band and an existing active type torsional vibration damper is large in energy consumption are solved, expensive hydraulic components are replaced, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of torsional vibration reduction of a power transmission system, in particular to a magnetorheological elastomer variable stiffness torsional vibration absorber. Background technique [0002] The torsional vibration of the vehicle shaft transmission is the main source of vehicle vibration and noise, which seriously affects the comfort of the vehicle. When the transmission system continues to vibrate, it will cause fatigue damage to components such as the engine crankshaft, gearbox gear and transmission shaft, and affect the dynamic performance and economic performance of the vehicle. With the rapid development of automobile technology, the power and economy of automobiles have been improved, and the problem of vehicle vibration and noise has become prominent. In order to improve the NVH performance of vehicles and meet people's ever-increasing requirements for automobiles, various automobile manufacturers a...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a magnetorheological elastomer variable stiffness torsional vibration absorber, which solves the above problems well. It utilizes the principle of dynamic tuning vibration absorption to reduce the torsional vibration of the power transmission system, and solves the existing passive torsional vibration reduction. The problems of narrow operating frequency band and high energy consumption of the active torsional shock absorber, and the use of magneto-rheological elastomers to simplify the control mechanism, replace expensive hydraulic components, and reduce manufacturing costs

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