Rotary expansible chamber devices – With mechanical sealing – Axially movable end wall or end wall portion
Patent
1979-10-30
1982-01-19
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
Axially movable end wall or end wall portion
418178, 418179, F03C 208, F04C 218, F04C 1500
Patent
active
043114458
ABSTRACT:
Hydraulic equipment useful as a pump or motor intended for applications where hydraulic fluid is exposed to contamination by abrasive particulate material is disclosed. Leakage paths from the high pressure chamber in a gear pump or motor are provided with inserts of an abrasion and erosion resistant material at points where wear from abrasives in the hydraulic fluid is aggravated. In particular, the bearing surfaces of the pressure loaded side plates are provided with an insert of abrasion and erosion resistant material in the mesh region of the teeth. Erosion and abrasion resistant rings are located on the side plates in the region surrounding the openings for the shafts and extending interiorly of the tooth root circle to the journal bearings.
Also disclosed are radial sealing shoes which are supported by the side plates and are radially urged into sealing relationship with the tips of the teeth by the pressure existing at the high pressure side of the gears.
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Eley James M.
Joyce Arthur B.
Lindrooth Charles H.
Tyrone Hydraulics Inc.
Vrablik John J.
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