Pressure regulating servo valve with reduced leakage flow
A technology of pressure regulation and servo valve, which is applied in the direction of fluid pressure control, fluid pressure actuation device, servo motor assembly, etc., and can solve problems such as difficulty in starting
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[0012] Referring to the drawings, the pressure regulator servo valve of the present invention comprises: a main body or cylinder 1 having a feed port P for connection to a source of hydraulic fluid under pressure; a return port R for connection to a to a tank (not shown); and with port U for connection to a piece of equipment, such as a hydraulic chamber (not shown) of an aircraft brake.
[0013] The spool 2 is slidably mounted in a calibrated orifice in the body 1 . The spool 2 has a land 3 cooperating with a central portion 4 of the calibrated orifice with slight clearance and extending firstly between the utilization port U and the return port R, and secondly between the utilization port U and the feed port P.
[0014] Due to the sliding gap between the table 3 and the central portion 4 of the calibration orifice, a channel providing communication between the utilization port U and both the return port R and the feed port P remains. In the position shown, the passage betwe...
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