Centrifugal oil pump booster
AssigneeTecumseh Products Company
InventorsKenneth D. Robertson, Daniel J. Hadesh, Robert A. Lindstrom
Life of this patent
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Abstract
A compressor assembly including a crankshaft with an axial oil passageway therein. An oil pump booster is mounted on the crankshaft to increase the oil flow rate through the axial oil passage. The oil pump booster includes a counterweight and an enclosed channel extending in the radial direction communicating with the axial passageway of the crankshaft. During rotation of the compressor crankshaft, the radial oil channel is likewise rotated creating a centrifugal force or reduced pressure area to increase the oil flow through the axial passage.
Claims12
A compressor, comprising:
- a hermetically sealed housing including an oil sump containing oil;
- a crankcase within said housing, said crankcase including a cylinder formed therein and a reciprocating piston disposed within said cylinder to compress gaseous refrigerant;
- a drive means for reciprocating said piston, said drive means including a crankshaft rotatably received in said crankcase, said crankshaft including an axial oil passage for transporting oil from said sump to said crankcase;
- an oil pumping mechanism on a lower end of said crankshaft communicating between said sump and said axial oil passage to pump oil through said axial oil passage;
- and
- an oil pump booster attached to an upper end of said crankshaft to increase the flow of oil through said crankshaft, said oil pump booster including a counterweight and a enclosed oil channel extending in a radial direction and terminating in a discharge opening, said channel in communication with said axial oil passage, whereby during rotation of said crankshaft, said radial oil channel is likewise rotated creating a reduced pressure at the discharge opening to increase oil flow through said axial oil passage.
A compressor, comprising:
- a hermetically sealed housing including an oil sump containing oil;
- a crankcase within said housing, said crankcase including a cylinder formed therein and a reciprocating piston disposed within said cylinder to compress gaseous refrigerant;
- drive means for reciprocating said piston, said drive means including a vertical crankshaft having a top end and a bottom end, said crankshaft rotatably received in said crankcase, said crankshaft bottom end submerged within said oil sump and including an axial oil passage for transporting oil from said sump to said crankshaft top end;
- an oil pumping mechanism communicating between said sump and said axial oil passage to pump oil through said axial oil passage;
- and
- an oil pump booster attached to said crankshaft top end to increase the flow of oil through said crankshaft, said oil pump booster including a counterweight and an enclosed oil channel extending in a radial direction and terminating in a discharge opening, said booster formed from two plate members juxtaposed and attached together to form said oil channel, said counterweight disposed between said plates, said channel in communication with said axial oil passage, whereby during rotation of said crankshaft said radial oil channel is likewise rotated, lowering the pressure at the top of the crankshaft thereby increasing oil flow through said axial oil passage.
Dependencies are inferred from the claim text.