Rotating group of a hydraulic machine
First Claim
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1. A hydraulic machine comprising:
- a housing;
a rotary group rotatably mounted within said housing, said rotary group including a barrel, a plurality of pistons axially slidable in cylinders in said barrel;
a swashplate assembly to engage said pistons and induce reciprocation thereof as said barrel rotates in said housing; and
a port plate interposed between said barrel and said housing, and being effective to connect respective ones of said cylinders alternatively with an inlet port and an outlet port, said port plate having a face biased into engagement with a sealing face on one of said barrel and said housing and hydraulically connected to the other of said barrel and said housing through an annular sleeve extending between and in sealing engagement with said port plate and said other of said barrel and said housing;
whereby upon rotation of said barrel relative to said housing, said faces are maintained in sealing contact by said bias and fluid is transferred between one of said ports and said cylinders through said annular sleeve, misalignment between said port plate and said other of said barrel and said housing being accommodated by said annular sleeve.
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Abstract
A hydraulic machine-has a rotating group located within a housing and a port plate to control flow from the barrel of the rotating group to inlet and outlet ports. The port plate is sealed against one of the housing or barrel and sleeves extend between the other of the housing or barrel to accommodate misalignment between the barrel and housing as the barrel rotates.
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Citations
24 Claims
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1. A hydraulic machine comprising:
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a housing; a rotary group rotatably mounted within said housing, said rotary group including a barrel, a plurality of pistons axially slidable in cylinders in said barrel; a swashplate assembly to engage said pistons and induce reciprocation thereof as said barrel rotates in said housing; and a port plate interposed between said barrel and said housing, and being effective to connect respective ones of said cylinders alternatively with an inlet port and an outlet port, said port plate having a face biased into engagement with a sealing face on one of said barrel and said housing and hydraulically connected to the other of said barrel and said housing through an annular sleeve extending between and in sealing engagement with said port plate and said other of said barrel and said housing; whereby upon rotation of said barrel relative to said housing, said faces are maintained in sealing contact by said bias and fluid is transferred between one of said ports and said cylinders through said annular sleeve, misalignment between said port plate and said other of said barrel and said housing being accommodated by said annular sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification