Hydrostatic bearing arrangement for pump swashplate having secondary angle
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United States of America Patent
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Jul 20, 2010
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N/A
app pub date -
Oct 29, 2008
filing date -
Oct 29, 2007
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Abstract
A hydraulic axial piston pump is designed with a secondary swashplate angle for providing improved performance and life. The secondary swashplate angle produces a sideload on the swashplate that is reacted by the pump's housing. A hydrostatically balanced thrust bearing is used to counteract the sideload produced by the secondary swashplate angle. The bearing design includes a tiltable pad or shoe supplied with pressurized fluid from the pump's discharge port. The same fluid that supplies the tiltable pad may also supply the pump's cradle bearings.
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