Depression of Self-Excited Pressure Oscillations and Noise in the Pilot Stage of a Hydraulic Jet-Pipe Servo-Valve Using Magnetic Fluids

Song Jing Li; Jing Hui Peng; Sheng Zhuo Zhang; Jacob M. Mchenya

doi:10.4028/www.scientific.net/AMR.378-379.632

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 378-379Depression of Self-Excited Pressure Oscillations...

Depression of Self-Excited Pressure Oscillations and Noise in the Pilot Stage of a Hydraulic Jet-Pipe Servo-Valve Using Magnetic Fluids

Abstract:

Magnetic fluid (MF) shows an increased saturation magnetization when exposed to a magnetic field. In order to improve the quality of servo-valve products by depressing and overcoming the self-excited high-frequency pressure oscillations and noise appearing in pilot stage of a hydraulic servo-valve, application of magnetic fluid in a hydraulic servo-valve is developed in this paper. Large damping can be introduced by the magnetic fluids into the servo-valve if magnetic fluids are filled into the working gaps of the hydraulic servo-valve torque motor. After the construction and working principle of a hydraulic servo-valve with magnetic fluids are introduced, the high-frequency pressure oscillation signals are tested and recorded when magnetic fluids are applied or not in the servo-valve. Experimental results are compared and analyzed by using FFT analysis method. It is shown that pressure oscillations of the servo-valve are depressed when magnetic fluids are applied.

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Periodical:

Advanced Materials Research (Volumes 378-379)

Pages:

632-635

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.378-379.632

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Online since:

October 2011

Authors:

Song Jing Li, Jing Hui Peng, Sheng Zhuo Zhang, Jacob M. Mchenya

Keywords:

Magnetic Fluid, Noise, Pressure Oscillation, Self-Excited, Servo-Valve

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