High pressure gear pump or motor with axial retaining means and

Details High pressure gear pump or motor with axial retaining means and High pressure gear pump or motor with axial retaining means and

1981-08-10

1982-11-09

Vrablik, John J.

Rotary expansible chamber devices

Pressure fluid radially balances working or rotating...

418132, 418134, 418135, F04C 218, F04C 1300, F04C 1500, F03C 208

Patent

active

043582583

ABSTRACT:
A liquid displacement device which utilizes an internal unit assembly type construction wherein the internal unit assembly can be installed in or removed from a cavity in the housing of the device as a unit. The internal unit assembly includes a pair of meshed gears, which are rotatably supported by a pair of axially spaced end plates disposed on opposite sides of the gears. The internal unit assembly also includes at least one pair of thrust members and at least one corresponding pair of axial pressure loading chambers which bias the thrust members in a direction to counterbalance the axial components of the pressure force at the discharge side of housing that tends to separate the end plates from predetermined positions with respect to the side faces of the gears. The internal unit assembly further includes radial pressure balancing chambers which engage the wall of the cavity and which counterbalance the radial components of the pressure force at the discharge side of the housing tending to laterally shift the internal unit assembly toward the inlet side of the housing. At least one tension member holds the components of the internal unit assembly in assembled relation and resists part of the pressure force tending to separate the end plates from their predetermined positions. Retaining rings are releasably mounted in grooves in the wall of the housing cavity for axially locating the internal unit assembly in the housing and for transmitting to the housing other portions of the axial components of the pressure force tending to separate the end plates. Locking rings having tapered inner peripheral surfaces which engage chamfered surfaces on the thrust or end plates of the internal unit assembly also engage the wall of the housing cavity and transmit to the housing portions of the axial components of the pressure force tending to axially separate the end plates from their predetermined positions.

REFERENCES:
patent: 2714856 (1955-08-01), Kane
patent: 2772638 (1956-12-01), Nagely
patent: 2848953 (1958-08-01), Nagely
patent: 2967487 (1961-01-01), Nagely
patent: 2974605 (1961-03-01), Murray
patent: 3029739 (1962-04-01), Nagely
patent: 3496877 (1970-02-01), Eckerle et al.
patent: 3558247 (1971-01-01), Gaertner

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