发明名称 |
Pitch control system for variable pitch propeller |
摘要 |
A pitch control system (10) for a variable pitch propeller effects engine governor (330), control of blade pitch under normal operating conditions and automatically effects direct (beta) control of blade pitch by the power lever (305) throughout a predetermined range of power lever settings. The system is hydromechanical and comprises a pitch actuator (40) and a pair of control valves (120 and 210), a first of the valves (120) applying a metered fluid pressure from a governor controlled pilot valve to the actuator and blocking that signal and replacing it with a supply fluid pressure at the point of transition from governor to beta control. The second control valve (210) effects a controlled draining of the actuator and connection thereof with the power lever (305).
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申请公布号 |
US4533295(A) |
申请公布日期 |
1985.08.06 |
申请号 |
US19820451637 |
申请日期 |
1982.12.20 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
DUCHESNEAU, JEROME G. |
分类号 |
B63H3/10;B64C11/38;B64C11/40;F02K3/04;(IPC1-7):B64C11/40 |
主分类号 |
B63H3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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