Research on the characteristics of sliding valve piezoelectric high-speed on/off valve
A spool type high-speed on/off valve(HSV)driven by piezoelectric was designed to improve the response speed and reduce the spool's impact.The piezoelectric was used to improve its response speed and the spool valve was adopted to avoid the rigid collision between the valve spool and the valve body.The mathematical model of HSV was established,the influences of design parameters on its performance were analyzed,and the performance indexes were studied.The simulation and experimental results indicated that the HSV had a flow rate of 3.8 L/min,a leakage flow rate of 0.48 L/min,an opening time of 0.6 ms and a closing time of 0.65 ms at the pressure of 4 MPa.The leakage flow can be reduced by improving the manufacturing quality.Compared with the traditional conical valve structure,the vibration acceleration of the valve body in the closing process of the spool type HSV driven by piezoelectric actuator was reduced by 32.8％,and the noise was reduced from 70.5 dB to 64 dB at the working frequency of 300 Hz.The proposed spool type HSV driven by piezoelectric had higher response speed,weaker spool's impact,longer service life and lower noise during working.
万方数据
维普
