Study on Car Magneto-rheological Fluid Shock Absorber with the Structure of Mono-tube and Charged-gas Bag

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (19) : 86-92.

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Study on Car Magneto-rheological Fluid Shock Absorber with the Structure of Mono-tube and Charged-gas Bag

JU Rui1 LIAO Chang-rong1 ZHOU Zhi-jiang1 TANG Rui2 ZHANG Deng-you2

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Abstract

This paper proposes a novel mono-tube based magneto-rheological fluid (MRF) shock absorber with composite throttling guider and charged-gas bag, aiming at solving the jam problem of the bottom valve of double-tube damper, and the sealing trouble of the floating piston of mono-tube. The Herschel-Bulkley constitutive model parameters are identified by experimental data. The quasi-steady differential equations of MRF flow in the annular damping channel are established to obtain the distribution expressions of MRF flow velocity by means of Herschel-Bulkley model. The calculation method was studied for MRF damping force of the non-newtonian fluid in the annular channel, Newtonian fluid in the throttling holes, and the force of the charged-gas bag. A prototype MRF shock absorber is designed and fabricated, according to the suspension technology requirements of a selected automobile. The dynamometer characteristic of the shock absorber is tested with a WDTS type hydraulic damper test bench. Under various current excitation values, the result shows that the experimental data are in good agreement with the theoretical values, demonstrating the rationality of the proposed analytical methodology.

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Magneto-rheological Fluid Shock Absorber Orifice Compensated Herschel-Bulkley

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JU Rui LIAO Chang-rong ZHOU Zhi-jiang TANG Rui ZHANG Deng-you. Study on Car Magneto-rheological Fluid Shock Absorber with the Structure of Mono-tube and Charged-gas Bag[J]. Journal of Vibration and Shock, 2014, 33(19): 86-92