| 摘要 |
In a positive displacement hydraulic pump (68), a system for preventing cavitation includes a regulator valve, a valve spool (74) formed with control lands (76,78) moveable within a bore (72) communicating with control pressure taken at an inlet port (100) and control pressure at a reservoir inlet port (62). The spool opens and closes a connection between the inlet port (96) and outlet port (90) in accordance with changes in differential pressure between the reservoir (atmospheric pressure) and pressure in the inlet port (100). When the differential pressure is low, the valve closes the connection; when the differential pressure is large, the valve opens the connection.
|
