Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Motive fluid bypass to or from assembly
Patent
1979-06-22
1981-01-13
Cohen, Irwin C.
Motors: expansible chamber type
Three or more cylinders arranged in parallel radial or...
Motive fluid bypass to or from assembly
60456, 60487, 91490, 92 58, 92158, F01B 106, F01B 1306
Patent
active
042442796
ABSTRACT:
A hydrostatic transmission having a pump and a motor of the radial piston type with each cylinder slipper bearing rotatably supported by a hybrid or combination hydrostatic and hydrodynamic bearing on an internal bearing. The hydrostatic bearing component has a restricted port connecting hydrostatic pressure fluid from the cylinder to supply a distribution recess in the slipper bearing surface for hydrostatic pressure feed of the fluid film providing hydrostatic balancing pressure gradient between the slipper and internal bearing to balance a high percentage of the hydrostatic pressure load and to meet flow requirements for low speed operation. The hydrodynamic bearing component has a low pressure source to spray fluid on the internal bearing, annular dams on each side retaining fluid on the internal bearing, and a taper at the leading edge of the slipper bearing to force fluid into the bearing clearance and provide a hydrodynamic balancing pressure component and fluid flow increasing with speed to balance the centrifugal load and effect balancing of the remaining hydrostatic load and to meet flow requirements which increase with speed. The total hydrostatic and hydrodynamic balancing pressure balances the total load.
REFERENCES:
patent: 3274946 (1966-09-01), Simmons
patent: 3373636 (1968-03-01), Livezey et al.
patent: 3640157 (1972-02-01), Schaefer
patent: 3752010 (1973-08-01), Tipping
patent: 3982448 (1976-09-01), Polak et al.
Lucas James R.
Stewart Max E.
Cohen Irwin C.
General Motors Corporation
Heiter A. M.
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