Internal gear hydraulic device with balancing recesses in the ho

Details Internal gear hydraulic device with balancing recesses in the ho Internal gear hydraulic device with balancing recesses in the ho

1977-12-08

1980-07-22

Vrablik, John J.

Rotary expansible chamber devices

Pressure fluid radially balances working or rotating...

418126, 418129, 418170, F03C 300, F04C 106, F04C 500, F04C 1500

Patent

active

042137462

ABSTRACT:
A high pressure internal gear pump has an inner rotor with outer gear-type teeth inside of an outer rotor with inner gear type teeth. The outer rotor is eccentrically revolving relatively to the inner rotor, whereby the gear-teeth are meeting each other as known from the former art. A half-moon like part is provided between the inner and outer rotor as usual in such pumps. The invention provides slots for the reception of pressure in the part between the teeth or in the housing surrounding the outer rotor. The pressure in said slot or slots presses the neighboring portions against the inner- and/or outer rotor for more perfect seal at high pressure. In addition an axially adjusting thrust body may be provided to seal the ends of the rotors. The mentioned slots may have enlargements on suitable locations in order to make the adjacent sealing parts more flexible for suitable sealing engagement with the respective portions of the rotors. Rotors and separation member can float freely under balanced fluid pressure loads.

REFERENCES:
patent: 260678 (1882-07-01), Hardy
patent: 1646615 (1927-10-01), Furness
patent: 3265005 (1966-08-01), Ringgenberg
patent: 3486459 (1969-12-01), Eltze
patent: 3496877 (1970-02-01), Eckerle et al.
patent: 3586465 (1971-06-01), Eltze
patent: 3759639 (1973-09-01), Molly
patent: 4132514 (1979-01-01), Eckerle

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