Design and Analysis of High Precision Flow Proportional Regulating Valve Based on Piezoelectric Drive

Abstract With the development of micro-satellite propulsion system towards high precision, light and miniaturization, higher requirements are put forward for precise adjustment of propulsion system. Based on the principle of piezoelectric micro-displacement drive, this paper designs a light and small proportional flow control valve, adopts compliant amplification mechanism, develops the throttling design of small flow in the form of valve needle, analyzes the flow characteristics in the proportional adjustment process under different parameters, and realizes the micro-flow control ability with a flow control range of 0∼2mg/s and a flow control accuracy better than 3%. This design and analysis method can meet the needs of large-scale and high-precision flow control, and provide technical support for subsequent engineering applications.