Cavitation control for swash-plate hydraulic pumps

Details Cavitation control for swash-plate hydraulic pumps Cavitation control for swash-plate hydraulic pumps

1996-12-26

1999-04-06

Thorpe, Timothy S.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417213, 417270, F04B 126

Patent

active

058908773

ABSTRACT:
Cavitation in a swash-plate pump is prevented by applying pump input pressure and a preselected spring force to a first end of a valve spool against countervailing atmospheric pressure applied against a second end of the valve spool wherein the valve spool moves to an open position with respect to an anti-cavitation valve upon the sum of the input pressure and spring pressure decreasing to less than atmospheric pressure. When the anti-cavitation valve opens, pump output pressure is applied through the anti-cavitation valve to a pump displacement control cylinder which decreases pump displacement so as to keep pump input pressure from decreasing to the point of cavitation.

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