ELECTROHYDRAULIC PITCH-CONTROL SYSTEM WITH A VALVE PUMP IN A ROTATING REFERENCE FRAME
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United States of America Patent
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Issued Date -
Aug 1, 2024
app pub date -
May 20, 2022
filing date -
May 28, 2021
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Abstract
The present invention relates to a pitch-change mechanism for a turbine engine propeller, said turbine engine comprising a stator portion and a rotor portion, said pitch-change mechanism comprising an electrohydraulic actuator comprising: —a cylinder for actuating the propeller, comprising a first chamber and a second chamber; —a hydraulic pump suitable for selectively supplying the first chamber or the second chamber of the cylinder with pressurized hydraulic fluid; —a hydraulic fluid reservoir configured to store a pressurized hydraulic fluid; —a valve controlled between a first position in which the valve places the first chamber of the cylinder in fluid communication with the hydraulic pump, and a second position in which the valve places the first chamber of the cylinder in fluid communication with the hydraulic fluid reservoir.
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