Development of a test bench to study the fluid mechanics of hydraulic orifices under high or low temperature conditions

KONG Xin1,3, WU Yong-ming1, XU Jia-bing2, WANG Wen-lin3
(1.School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;
2.Guilin Woodpecker Medical Equipment Co., Ltd., Guilin 541004, China; 3.School of Mechanical
Engineering, Dongguan University of Technology, Dongguan 523808, China)

Abstract: Aiming at the problem of being difficult in oil supply and temperature control when testing hydraulic orifice performance under high or low temperature conditions, an integrated experimental module which integrates the oil, the oil supply mechanism, the test valve with orifice and several sensors was proposed,the experimental module could be wholly placed into a high/low temperature chamber to undertake experiments. Based on the integrated experimental madule, the high and low temperature hydrodynamics experimental divice of hydraulic orifice was further developed. A test bench which uses a variablefrequencymotordriven nut screw to control the oil supply was developed,an automatic system was developed based on the virtual instrument technologyto enable automatic measurement, data acquisition and control. In addition, various precautions for signal anti-interference and sensor calibration were adopted to improve the measurement accuracy.The results indicate that the test bench can conveniently perform fluid mechanics experiments for various hydraulic orifices under high or low temperature conditions with high efficiency, so the test bench can be a very good platform for pertinent basic research works.
Key words: hydraulic orifices; high or low temperature;integrated experimental module; fluid mechanic experiment; measurement and control technology