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公开(公告)号：US20240271577A1
公开(公告)日：2024-08-15
申请号：US18436826
申请日：2024-02-08
发明人： Yusuf Syed , Thomas Trevor Ricci , James Jarvo
摘要： A method of and system for operating a hybrid electric propulsion system for an aircraft in a start sequence is provided. The hybrid electric propulsion system includes a thermal engine, an electric motor, a gearbox, an electric power storage unit, and a propulsion unit having a propeller having propeller blades. The method includes: driving the propeller from a static state to a target rotational speed within a predetermined range of speeds using the electric motor; transitioning the propeller blades from a feathered mode to an unfeathered mode while the propeller is being driven at the target rotational speed solely by the electric motor; starting the thermal engine; and transitioning the driving of the propeller using the electric motor to driving the propeller using the thermal engine.
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公开(公告)号：US11827336B2
公开(公告)日：2023-11-28
申请号：US16717547
申请日：2019-12-17
发明人： Timothy Maver , Julien Lassalle , Thibaut Marger , Gregory Giddings , Charles L. DeGeorge , Stephen J. Bukowinski , Romain Bouloc
CPC分类号： B64C11/385 , B64C11/40 , B64C11/303 , B64C11/44 , B64D2027/026 , F05D2220/323 , F05D2260/76 , F05D2260/79 , F05D2260/83 , F05D2270/62
摘要： A system for controlling a propeller having a plurality of blades having a primary control system and a backup control system. The primary control system including a sensor responsive to a propeller state, and a controller connected to the sensor and to an electrohydraulic control actuator. The electrohydraulic control actuator is connected via a bypass valve to a hydraulic actuator that controls at least a blade angle of a blade of the propeller. The controller generating commands to the electrohydraulic control actuator based on at least the propeller state. The backup control system including a second controller, an electrohydraulic solenoid operably connected to the bypass valve. The backup control system is operable to hydraulically disable the primary control system via the bypass valve upon the occurrence of a selected condition, the second controller modulates the operation of the electrohydraulic solenoid to control the bypass actuator based on the propeller state.
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公开(公告)号：US20230339601A1
公开(公告)日：2023-10-26
申请号：US18305283
申请日：2023-04-21
申请人： Supernal, LLC
发明人： Bryan MARSHALL , Eric LOOS
摘要： A rotor assembly includes a hub assembly and a shaft assembly. The hub assembly includes a hub and a first coupling, and the shaft assembly may be coupled to the hub assembly with a second coupling. The second coupling may be configured to facilitate rotation of the hub relative to a shaft of the shaft assembly. A rotor blade may be coupled to the hub assembly with a third coupling and be configured to rotate with the shaft. The first coupling may be configured to couple the hub to an actuator and transmit movements of the actuator to the hub to facilitate cyclic pitch control of the rotor blade. The rotor shaft may include arms and the hub may include a body coupled to the rotor blade by the third coupling and pairs of extensions that extend from a surface of the body to receive the arms.
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公开(公告)号：US11708768B2
公开(公告)日：2023-07-25
申请号：US17680801
申请日：2022-02-25
发明人： Brant Duke , Kenneth Matheson
CPC分类号： F01D21/003 , B64C11/06 , B64C11/30 , B64C11/325 , B64C11/385 , B64F5/60 , F01D7/00
摘要： There is described herein the automation of propeller feather testing functions, whereby the test is automatically performed and a pass/fail signal is issued upon completion.
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公开(公告)号：US20230174220A1
公开(公告)日：2023-06-08
申请号：US18073131
申请日：2022-12-01
发明人： MARTIN ALBRECHT , Gerd Muehlbauer
CPC分类号： B64C11/385 , B63H3/08 , B63H2003/088
摘要： A hydraulically adjustable propeller assembly for an aircraft, a land vehicle or a water craft, includes an engine, a propeller unit having a propeller which comprises at least two propeller blades whose pitch is hydraulically settable, a pressure control unit which predetermines a fluid pressure for setting the pitch of the propeller blades and which is hydraulically connected to a pressure chamber of the propeller via a control line, and a pump unit which supplies a hydraulic fluid which is under a base pressure to the pressure control unit. The pump unit is a unit driven independently of the engine and the pressure control unit and includes at least one electrically operated main pump which supplies the hydraulic fluid which is under the base pressure for the pressure control unit.
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公开(公告)号：US20220340260A1
公开(公告)日：2022-10-27
申请号：US17241915
申请日：2021-04-27
发明人： Jagoda KRZYWON
摘要： There is provided a method and a system for detecting and mitigating a propeller failure condition. An actual value of a rotational speed of the propeller and/or of a pitch angle of blades of the propeller is obtained. In response to determining that the speed is below a reference rotational speed for the propeller and/or determining that the pitch angle is above a pitch angle threshold, an actuator operatively connected to the blades is commanded to decrease the pitch angle to increase the speed towards the reference speed. After commanding of the actuator to decrease the pitch angle, a subsequent value of the speed and/or a subsequent value of the pitch angle is obtained. The actuator is commanded to hold the pitch angle in response to determining that the speed has failed to increase towards the reference speed and/or determining that the pitch angle has failed to decrease.
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公开(公告)号：US20220243609A1
公开(公告)日：2022-08-04
申请号：US17680801
申请日：2022-02-25
发明人： Brant DUKE , Kenneth MATHESON
摘要： There is described herein the automation of propeller feather testing functions, whereby the test is automatically performed and a pass/fail signal is issued upon completion.
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公开(公告)号：US11364990B2
公开(公告)日：2022-06-21
申请号：US16055549
申请日：2018-08-06
IPC分类号： B64C11/38
摘要： The variable pitch propeller control system can have a source of adjustable, actuation hydraulic pressure, a feather valve openable to provide an actuation path of the actuation hydraulic pressure between the source and the actuator, and closeable to connect the actuator to a drain below the actuation hydraulic pressure and close the actuator path, and a bypass path parallel to the actuator path, the bypass path having a restricted flow area relative to a flow area of the actuator path.
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69.发明申请公开(公告)号：US20220112902A1
公开(公告)日：2022-04-14
申请号：US17560544
申请日：2021-12-23
摘要： The variable pitch propeller assembly includes a hub. The variable pitch propeller assembly also includes a plurality of propeller blade assemblies spaced circumferentially about the hub. Each of the plurality of propeller blade assemblies configured to rotate a respective propeller blade. The variable pitch propeller assembly also includes a hydraulic fluid port assembly integrally formed and including at least three hydraulic fluid ports configured to receive respective flows of hydraulic fluid from a stationary hydraulic fluid transfer sleeve. The variable pitch propeller assembly also includes a pitch actuator assembly coupled in flow communication with at least three hydraulic fluid ports through respective hydraulic fluid transfer tubes. The pitch actuator coupled to the plurality of propeller blade assemblies to selectively control a pitch of the propeller blades. The pitch actuator assembly includes a travel stop configured to limit a rotation of at least one of the pitch actuator assemblies.
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公开(公告)号：US11286806B2
公开(公告)日：2022-03-29
申请号：US16655424
申请日：2019-10-17
发明人： Brant Duke , Kenneth Matheson
摘要： There is described herein methods and systems for testing a propeller feathering function. The method comprises monitoring a rotational speed over time of propeller blades of an aircraft, commanding an angle change of the propeller blades, comparing a post-angle change rotational speed of the propeller blades to an expected rotational speed without the commanded angle change and obtaining, by the processor, a rotational speed difference, and issuing a test passed signal when the rotational speed difference exceeds a threshold and a test failed signal when the rotational speed difference does not exceed the threshold.
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