|
Abstract: The
extra-high pressure pneumatic on-off valve is very important part in a
new pressure reducing method by expander that is used for enhancing the
efficiency of extra-high pressure pneumatic power system. The operation
principle and dynamic property of the valve are detailedly investigated
by means of theoretical and experimental way. The problem of needing
large driving power and slowing response in extra-high pressure
pneumatic on-off valve is solved by means of pneumatic dynamic force
balance method. A two-stage valve that used a pilot solenoid spherical
valve to control a large flow-rate poppet valve is developed. The
definitions and rules of dynamic processes based on the control chamber
volume changing or not, and on the key pressure points in the control
chamber are put forward. The mathematical models of the valve are
obtained based on above definitions and rules. Some influencing factors
to the valve are analyzed. The results show that the dynamic property of
the valve is corresponding between simulation and test.
Key words: Extra-high
pressure pneumatic Pneumatic on-off valve Model
Dynamic property
CLC No: TH138
国家自然科学基金资助项目(50122115).
Received 20030220, received in revised form 20030830
|