High pressure pump with a flow control valve

Details High pressure pump with a flow control valve High pressure pump with a flow control valve

1985-04-01

1986-01-14

Smith, Leonard E.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

138 39, F01B 4900, F15D 104

Patent

active

045643385

ABSTRACT:
A vane pump having a flow regulating bypass valve activated by outlet pressure to direct excess flow back to the inlet is provided with a channeling having an element comprising a plug insertable in the valve housing, which plug has a specially shaped flow bend in the form of an arcate groove that forms a smooth transition for combined flow from a tank fed inlet and from the bypass valve to the pump inlet. This is effected by connecting a channel from the tank inlet and bypass valve to a channel for flow return to the pump inlet which channels are angularly related. Since the valve housing is die cast the difficulty of providing, in a casting, an exactly shaped smooth surfaced and accurately dimensioned transition passage between the aforementioned channels is overcome by the invention. The plug itself may be die cast or molded of plastic and effects a combined flow which is substantially laminar for smoothly efficient passage to the pumping chambers between the vanes of a vane pump, so as to provide a high efficiency of charging under suction pressure.

REFERENCES:
patent: 2590797 (1952-03-01), Siciliano
patent: 3977730 (1976-08-01), Seick

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