ELECTRO-HYDRAULIC SERVO VALVE WITH COIL-TYPE FEEDBACK SPRING

    公开(公告)号:US20190085870A1

    公开(公告)日:2019-03-21

    申请号:US15705714

    申请日:2017-09-15

    Abstract: An electrohydraulic servo valve (EHSV) includes a housing assembly, a spool valve, an armature, a control mechanism, and a feedback spring. The spool valve is movably disposed within the housing assembly. The armature is rotationally mounted on the housing assembly. The control mechanism is coupled to the armature and is rotatable therewith. The feedback spring is coupled between the control mechanism and the spool valve, and includes a helical coil that is disposed on and engages the control mechanism, and a cantilever portion that extends from the helical portion to a terminus that engages the spool valve.

    TWO-POSITION, TWO-STAGE SERVO VALVE
    2.
    发明申请
    TWO-POSITION, TWO-STAGE SERVO VALVE 有权
    两位两用伺服阀

    公开(公告)号:US20160201812A1

    公开(公告)日:2016-07-14

    申请号:US14595581

    申请日:2015-01-13

    Abstract: A two-position, two-stage servo valve includes a valve body, a valve element, a control pressure chamber, and a control element. The valve body has an inner surface that defines a valve element chamber that includes a first control chamber and a second control chamber. The first control chamber is larger than the second control chamber. The valve element has first and second ends and is disposed within the valve element chamber and is movable between a first valve position and a second valve position. The first end is larger than the second end and is disposed within the first control chamber, and the second end is disposed within the second control chamber. The control pressure chamber includes a control pressure port that is in continuous fluid communication with the first control chamber. The control element is movable between a first control position and a second control position.

    Abstract translation: 两位两级伺服阀包括阀体,阀元件,控制压力室和控制元件。 阀体具有限定包括第一控制室和第二控制室的阀元件室的内表面。 第一控制室大于第二控制室。 阀元件具有第一和第二端并且设置在阀元件室内并且可在第一阀位置和第二阀位置之间移动。 第一端大于第二端,并设置在第一控制室内,第二端设置在第二控制室内。 控制压力室包括与第一控制室连续流体连通的控制压力端口。 控制元件可在第一控制位置和第二控制位置之间移动。

    Fluid system with variable pump discharge pressure and method

    公开(公告)号:US11788476B1

    公开(公告)日:2023-10-17

    申请号:US17804926

    申请日:2022-06-01

    Abstract: Methods and fluid supply systems are provided for supplying fluids while adjusting a pump discharge pressure to compensate for downstream pressure changes. The fluid supply system comprises a variable displacement piston (VDP) pump configured to supply a fluid at a pump discharge pressure, fuel metering units (FMUs) downstream of the VDP pump, each of the FMUs configured to receive the fluid from the VDP pump at the pump discharge pressure and supply the fluid at metered flow discharge pressures, and a pump compensator valve fluidically coupled with the FMUs to receive the fluid therefrom at the metered flow discharge pressures and configured to continuously, either fluidically or mechanically, adjust the pump discharge pressure of the VDP pump between a higher of a minimum pump discharge pressure and a floating ceiling pump discharge pressure, the floating ceiling pump discharge pressure based on a highest of the metered flow discharge pressures.

    AXIAL PISTON PUMP WITH PORT PLATE HAVING BALANCE FEED APERTURE RELIEF FEATURE

    公开(公告)号:US20210095647A1

    公开(公告)日:2021-04-01

    申请号:US16586672

    申请日:2019-09-27

    Abstract: A piston pump includes a ported member that is moveably disposed within an internal space of a housing between a rotating group and the housing. The ported member includes a first face facing the rotating group and a second face facing a fluid inlet and outlet. The ported member includes an intake port and a discharge port. Moreover, the ported member includes a balance aperture configured to pass fluid between the biasing member and a pump chamber as the rotating group rotates within the internal space such that the biasing member biases the ported member toward a balanced position within the internal space. The balance aperture has a rim at the first face. The rim is clefted at a relief feature of the first face. The relief feature is recessed into the first face.

    COMBINED OVERSPEED AND FUEL STREAM SELECTOR SYSTEMS

    公开(公告)号:US20180135529A1

    公开(公告)日:2018-05-17

    申请号:US15354340

    申请日:2016-11-17

    CPC classification number: F02C7/232 F02C3/20 F05D2270/02 F05D2270/304

    Abstract: Embodiments of a combined overspeed and fuel stream selector system are provided. In an embodiment, the assembly includes a conduit network, a Discharge Select Valve (DSV), and a shutoff valve. The DSV is fluidly coupled to a primary fuel inlet, a secondary fuel inlet, and a primary fuel outlet included in the conduit network. The shutoff valve is fluidly coupled between the primary fuel inlet and the primary fuel outlet. In a standard operation mode, the shutoff valve is maintained in an open position, while fuel received at the primary fuel inlet is directed through the shutoff valve, through the DSV, and to the primary fuel inlet. Conversely, in a backup operation mode, the shutoff valve is closed to block fuel flow from the primary fuel inlet to the primary fuel outlet, while the DSV directs fuel flow received at the secondary fuel inlet to the primary fuel outlet.

    High-temperature torque motor actuator
    6.
    发明授权
    High-temperature torque motor actuator 有权
    高温扭矩电机执行器

    公开(公告)号:US09328839B2

    公开(公告)日:2016-05-03

    申请号:US14150139

    申请日:2014-01-08

    Abstract: A torque motor valve actuator includes a first magnetic pole piece, a second magnetic pole piece, an armature, and a coil. The first magnetic pole piece is of a first magnetic polarity. The second magnetic pole piece is of a second magnetic polarity, and is spaced apart from the first magnetic pole piece to define a gap. The armature is rotationally mounted and disposed in the gap between the first and second magnetic pole pieces. The coil surrounds at least a portion of the armature and is disposed such that it is not surrounded by either the first magnetic pole piece or the second magnetic pole piece. The coil is adapted to receive electric current and is configured, upon receipt thereof, to generate a magnetic force that causes the armature to rotate.

    Abstract translation: 扭矩电动机阀致动器包括第一磁极片,第二磁极片,电枢和线圈。 第一磁极片具有第一磁极性。 第二磁极片具有第二磁极性,并且与第一磁极片间隔开以限定间隙。 电枢被旋转地安装并设置在第一和第二磁极片之间的间隙中。 线圈包围电枢的至少一部分,并且被布置成使得它不被第一磁极片或第二磁极片包围。 线圈适于接收电流,并且在接收时被配置成产生使电枢旋转的磁力。

    Axial piston pump with port plate having balance feed aperture relief feature

    公开(公告)号:US11236736B2

    公开(公告)日:2022-02-01

    申请号:US16586672

    申请日:2019-09-27

    Abstract: A piston pump includes a ported member that is moveably disposed within an internal space of a housing between a rotating group and the housing. The ported member includes a first face facing the rotating group and a second face facing a fluid inlet and outlet. The ported member includes an intake port and a discharge port. Moreover, the ported member includes a balance aperture configured to pass fluid between the biasing member and a pump chamber as the rotating group rotates within the internal space such that the biasing member biases the ported member toward a balanced position within the internal space. The balance aperture has a rim at the first face. The rim is clefted at a relief feature of the first face. The relief feature is recessed into the first face.

    AXIAL PISTON PUMP WITH PISTON HAVING PASSIVE COOLING THERMAL RELIEF FEATURE

    公开(公告)号:US20210095658A1

    公开(公告)日:2021-04-01

    申请号:US16586623

    申请日:2019-09-27

    Abstract: A piston pump includes a rotor member with a bore therein. The bore is defined by an inner surface. The piston pump also includes a piston supported for reciprocating movement in an axial direction within the bore to change a volume of a pump chamber that is cooperatively defined by the piston and the rotor member. The piston has an outer surface that faces the inner surface with a leakage interface defined therebetween. The leakage interface is configured to receive a passive leakage flow of a fluid from the pump chamber through the leakage interface to provide cooling. Moreover, the outer surface includes a relief feature that is recessed into the outer surface to define, with the inner surface, a cooling pocket of the leakage interface. The cooling pocket moves in the axial direction relative to the inner surface with the reciprocating movement of the piston.

    HIGH-TEMPERATURE TORQUE MOTOR ACTUATOR
    9.
    发明申请
    HIGH-TEMPERATURE TORQUE MOTOR ACTUATOR 有权
    高温扭矩电机执行器

    公开(公告)号:US20150192218A1

    公开(公告)日:2015-07-09

    申请号:US14150139

    申请日:2014-01-08

    Abstract: A torque motor valve actuator includes a first magnetic pole piece, a second magnetic pole piece, an armature, and a coil. The first magnetic pole piece is of a first magnetic polarity. The second magnetic pole piece is of a second magnetic polarity, and is spaced apart from the first magnetic pole piece to define a gap. The armature is rotationally mounted and disposed in the gap between the first and second magnetic pole pieces. The coil surrounds at least a portion of the armature and is disposed such that it is not surrounded by either the first magnetic pole piece or the second magnetic pole piece. The coil is adapted to receive electric current and is configured, upon receipt thereof, to generate a magnetic force that causes the armature to rotate.

    Abstract translation: 扭矩电动机阀致动器包括第一磁极片,第二磁极片,电枢和线圈。 第一磁极片具有第一磁极性。 第二磁极片具有第二磁极性,并且与第一磁极片间隔开以限定间隙。 电枢被旋转地安装并设置在第一和第二磁极片之间的间隙中。 线圈包围电枢的至少一部分并且被布置成使得它不被第一磁极片或第二磁极片包围。 线圈适于接收电流,并且在接收时被配置成产生使电枢旋转的磁力。

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