Experimental investigation of vibration on a hydraulic retarder
ZHAO Yuqi1, DONG Liang1*, LIU Houlin1, DAI Cui2, XIAO Jiawei1
1. Research Center of pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：In order to study the influence of liquid-filling ratio, rotating speed and blade tilt angle on external characteristics of hydraulic retarder, the noise and vibration experimental system was established by using INV3020 data collection instrument, which realized the synchronous collection of vibration signal. By using 75°and 90° blade tilt angles of impeller in hydraulic retarder, we adjusted the li-quid-filling ratio from 50% to 100% and the frequency converter to stabilize the rotating speed varing from 800 r/min to 1 200 r/min. The results show that the performance of vibration increases with the liquid-filling ratio and the rotating speed increasing, the cavitation occurs in advance with the decrease of blade tilt angle, which can cause the vibration to increase sharply. The acting force produced by liquid flow from pump wheel to worm wheel in hydralic retarder is dominated by mainly axial impact, which makes serious vibration at axial measure point, which is more serious than that at other measure points.
