Experimental Analysis of Vibration and Noise Characteristics of Bent-Axis Piston Motor
To obtain the excitation and noise sources inside the bent-axis piston motor under different working conditions,its vibra-tion and noise test platform was built,the vibration and noise signals of the motor were collected and analyzed through a data acquisition system outside the semi-anechoic chamber.The experimental results show that the vibration intensity and noise level of the bent-axis piston motor increase with the increase of motor speed and pressure,and the main excitation and noise sources inside the motor are also different under different working conditions.Under the same pressure,when the speed is increased from 500 r/min to 1 200 r/min,the maximum amplitude position on the surface of the motor casing shifts from the casing to the rear end cover.At the same speed,as the pressure increases from 5 MPa to 15 MPa,the main noise source inside the motor changes from eccentricity and imbalance of the main shaft to pressure pulsation caused by flow distribution impact and flow pulsation.
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