贮箱自动无级增压可调文氏管的设计与试验

The stable control of tank pressure is crucial in the pressurization system of spacecraft tanks. In this paper, an adjustable Venturi tube based on a special conical pintle was designed, which could maintain a good linear correspondence between the pintle displacement and the flow rate, thereby improving the regulation accuracy. A closed automatic pressurization experiment based on the principle of negative feedback, as well as a system control and data acquisition based on programmable logic controllers were developed. The automatic pressurization experiment was conducted successfully. The results show that a high-precision, continuous, and stable pressure regulation over a wide flow range is accomplished by the device, offering some references for the design and improvement of the flow regulation device in the pressurization system.