| 摘要 |
A priority valve (10) useful in, for example, an aircraft constant speed drive system controls sump oil level and prioritizes oil flow to several critical components during periods of oil supply interruption. The priority valve (10) includes a movable spool (17) which has a reduced portion (19) surrounded by a spring (18) to urge the spool (17) toward a closing position in which oil is supplied directly from an accumulator (80) to a deaerator (20). The spool (17) is caused to move against the bias of the spring (18) by output oil pressure of the deaerator (20) which is input into the valve (10). The member (17) has an axial passageway (101) with branch radial passageways (103, 104, 105, and 106) for selectively prioritizing the flow of oil to critical system components such as a generator rotor (52), a generator stator (53), and a hydraulic case (90) so that whatever oil is available in the system is made available to the most critical system components.
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