Gear machine with oppositely aligned sealing elements

Details Gear machine with oppositely aligned sealing elements Gear machine with oppositely aligned sealing elements

1982-03-08

1984-06-19

Smith, Leonard E.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

F03C 208

Patent

active

044551304

ABSTRACT:
A hydraulic gear machine which is particularly suited for use as a reversible hydraulic gear motor includes a pair of gear elements having externally meshing outer peripheral gear portions and stub shafts which are supported in an internal chamber of a housing on respective sleeve-shaped bearings. Two such bearings are arranged at each axial side of the gear elements, one for the stub shaft of each of the gear elements which extends to this axial side. The housing includes a circumferential wall and two end walls. Sealing elements having the configuration of the numeral three are arranged at the interfaces between the bearings and the end walls. The sealing elements are oppositely oriented with respect to a common plane including the axes of rotation of the gear elements at the respective axial sides. Depending on the direction of flow of pressurized hydraulic medium through the machine, a dominating pressure zone builds up at one or the other of the interfaces, the effect of the pressure of the pressurized medium on this pressure zone being to press the bearings in a sealing manner against the gear elements to eliminate gaps therebetween through which the pressurized hydraulic medium could otherwise escape without transferring its energy to the gear elements as useful mechanical energy.

REFERENCES:
patent: 2996997 (1961-08-01), Oliver
patent: 3891360 (1975-06-01), Dworak et al.
patent: 4029446 (1977-06-01), Mayer et al.
patent: 4281974 (1981-08-01), Teruyama
patent: 4311444 (1982-01-01), Shumate

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