Rotary pump and improved discharge port arrangement

Details Rotary pump and improved discharge port arrangement Rotary pump and improved discharge port arrangement

1982-04-15

1984-12-04

Gluck, Richard E.

Pumps

Diverse pumps

Moving partition or cylinder of rotary pump forms or...

418150, 418225, F04B 2310, F01C 110

Patent

active

044861508

ABSTRACT:
A rotary hydraulic vane pump is disclosed of the type including a cam ring (19) defining an internal cam surface (21). The pump also includes a rotor (25) which defines a plurality of slots (27) which receive roller vanes (29). The internal cam surface includes a discharge arc surface portion (65) which is the cam fall portion of the cam surface. In one aspect of the invention, it is recognized that flow turbulence, pressure pulses and noise is caused by a slight net increase in the volume of a contracting fluid chamber (57) during cam fall, and that this increase is caused by radially inward movement of the roller vane during cam fall. In another aspect of the invention, the discharge port (59) is located such that fluid communication between the contracting fluid chamber and the discharge port does not occur until after the net increase in the volume of the contracting fluid chamber has ceased, and a net decrease in the volume of the chamber has begun.

REFERENCES:
patent: 2836179 (1958-03-01), Klessig et al.
patent: 3589841 (1971-06-01), Delisse

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