Tandem rotary pump with pressure chamber between two intermediat

Details Tandem rotary pump with pressure chamber between two intermediat Tandem rotary pump with pressure chamber between two intermediat

1989-03-03

1990-11-20

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

418212, F04C 1100

Patent

active

049715356

ABSTRACT:
In a pump housing are installed a pair of pump rotors which rotate as one body with a rotating shaft. A plurality of vanes are mounted on these pump rotors to separate the internal space of each cam ring into a plurality of pump chambers. An intermediate side plate is positioned between the cam rings, which are held between one wall of the pump housing and a rear side plate. The intermediate side plate is constituted of a pair of side plates which are in contact with each other. A recess is formed in the inner peripheral part of one of the opposite sides of these side plates, forming a pressure chamber. A pressure fluid discharged from the pump chamber is supplied into this pressure chamber. The inner peripheral part of each side plate is elastically deflected by the fluid pressure of the pressure chamber into contact with the side of each pump rotor. Thus, gaps between the side plates and each pump rotor are narrowed, preventing fluid leaks.

REFERENCES:
patent: 3104530 (1963-09-01), Teichert
patent: 3645654 (1972-02-01), Niemiec
patent: 3697201 (1972-10-01), Eickmann
patent: 4347047 (1982-08-01), Shiozawa et al.
patent: 4415319 (1983-11-01), Masuda

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