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104 条记录 (耗时 0.022 秒)

    Latchable electrohydraulic servovalve
    3.
    发明授权
    Latchable electrohydraulic servovalve 有权
    可锁定电液伺服阀

    公开(公告)号：US07455074B2

    公开(公告)日：2008-11-25

    申请号：US11492845

    申请日：2006-07-26

    申请人： Jeffrey Dugan Shelby ,  Paul W. Futa, Jr. ,  Matthew A. Arend

    发明人： Jeffrey Dugan Shelby ,  Paul W. Futa, Jr. ,  Matthew A. Arend

    IPC分类号： F15B13/04

    CPC分类号： F15B13/0436 ,  F15B20/002 ,  Y10T137/86606 ,  Y10T137/86614 ,  Y10T137/8663

    摘要： An electro-hydraulic servovalve (EHSV) (10) that includes a nozzle (16), a motor (12) operably connected to the nozzle (16) for controlling the position of the nozzle (16) based on current provided to the motor (12), a spool (18) having first and second ends (22,26) slidably mounted in a sleeve (34) having first and second ends (31,33) and a first land (21) near the first end (22), a first passage (40) extending from near the nozzle (16) to the first end (31) of the sleeve (34), a second passage (42) extending from near the nozzle (16) to the second end (33) of the sleeve (34), the spool (18) shifting to a first fail-safe position when the current is below a first predetermined level and latching in a second fail-safe position different than the first fail-safe position when the current exceeds a second predetermined level greater than the first predetermined level.

    摘要翻译： 一种电动液压伺服阀（EHSV）（10），包括喷嘴（16），可操作地连接到喷嘴（16）的马达（12），用于基于提供给马达的电流来控制喷嘴（16）的位置 具有可滑动地安装在套筒（34）中的第一和第二端（22,26）的卷轴（18）具有在第一端（22）附近的第一和第二端（31,33）和第一平台（21） ，从喷嘴（16）附近延伸到套筒（34）的第一端（31）的第一通道（40），从喷嘴（16）附近延伸到第二端（33）的第二通道（42） 当电流低于第一预定水平时，阀芯（18）转换到第一故障安全位置，并且当电流超过第一故障安全位置时锁定在与第一故障安全位置不同的第二故障安全位置 大于第一预定水平的第二预定水平。

    Fail-freeze servovalve
    4.
    发明授权
    Fail-freeze servovalve 有权

    公开(公告)号：US06640833B2

    公开(公告)日：2003-11-04

    申请号：US10001976

    申请日：2001-12-05

    申请人： Jean-Marie Brocard ,  Michel Le Texier

    发明人： Jean-Marie Brocard ,  Michel Le Texier

    IPC分类号： F15B13043

    CPC分类号： F15B13/0402 ,  F15B13/0436 ,  F15B20/002 ,  Y10T137/86606 ,  Y10T137/86614

    摘要： The servovalve comprises an electric motor and a distributor valve integrating a hydraulic slide under the control of said electric motor and further comprising two load channels pierced in a central rod on which blocks are mounted for co-operating with communication orifices of the distributor valve and co-operating with one another and with the ends of the hydraulic slide to define annular chambers including two load chambers connected to the receiver member to be controlled. The two load channels put each of the load chambers into communication respectively with an immediately adjacent annular chamber so as to ensure that the same pressure exists on both sides of the blocks separating said two chambers. In a predetermined safe position (referred to a “fail-freeze” position) in which the blocks close the load orifices with clearance, the leaks through the load orifices that result from the clearance are drained at determined low pressure, thus enabling the drift of the controlled member to be controlled.

    High flow control valve
    5.
    发明授权
    High flow control valve 失效
    高流量控制阀

    公开(公告)号：US5156189A

    公开(公告)日：1992-10-20

    申请号：US406949

    申请日：1989-09-13

    申请人： Stephen J. Tranovich

    发明人： Stephen J. Tranovich

    IPC分类号： F15B13/043

    CPC分类号： F15B13/043 ,  F15B13/0436 ,  Y10T137/86606 ,  Y10T137/86702

    摘要： A control valve including a second stage spool for controlling flow of fluid from a source thereof to a load. The valve includes one additional pressure slot and one additional return slot on each side thereof and separated by a land on the spool from the usual pressure and return slots respectively. Each of the spool lands separating the pressure and return slots defines and opening therethrough to interconnect the slots so that upon movement of the spool to connect the source to the load, a greater flow of fluid is provided and would be possible with the same size spool without the additional pressure and return slots.

    摘要翻译： 一种控制阀，包括用于控制流体从其源到负载的流动的第二级阀芯。 该阀包括一个额外的压力槽和在其每一侧上的一个额外的返回槽，并且分别与卷筒上的平台和通常的压力和回流槽分开。 分离压力和回流槽的每个卷轴接头限定和打开穿过其中以互连槽，使得当卷轴移动以将源连接到负载时，提供更大的流体流并且可以使用相同尺寸的卷轴 没有额外的压力和回流槽。

    Fluid pressure device
    6.
    发明授权
    Fluid pressure device 失效
    流体压力装置

    公开(公告)号：US4464977A

    公开(公告)日：1984-08-14

    申请号：US394160

    申请日：1982-07-01

    申请人： Robert W. Brundage

    发明人： Robert W. Brundage

    IPC分类号： F15B9/03 ,  F15B13/043 ,  F15B9/10

    CPC分类号： F15B13/0436 ,  F15B9/03 ,  Y10T137/7904 ,  Y10T137/7905 ,  Y10T137/7929 ,  Y10T137/86614

    摘要： A fluid pressure device wherein a relatively low powered analog electrical signal accurately controls the position of the output member of a fluid pressure powered actuator which in turn can be used to exert mechanical forces or operate mechanical devices such as fluid pumps, motors or valves. Inlet and outlet passages communicate a control pressure chamber to high and low pressures respectively. A control element totally within the chamber so as to have balanced pressure forces thereon and made of a magnetically sensitive material is moved to a fixed position in the chamber proportional to the strength of an externally generated magnetic field. At least one of the passages moves with the output member so as to be opened or closed by the control element relative to the other passage. The output member follows the control element automatically varying the pressure in the chamber to compensate for any variations in the external forces thereon. The output member includes a rod like element having a port in its side for one of the passages and the control element is a sleeve surrounding the rod and can be moved by any externally controlled means including the magnetic field or an external mechanical interconnection.

    摘要翻译： 一种流体压力装置，其中相对较低功率的模拟电信号精确地控制流体压力动力致动器的输出构件的位置，所述输出构件又可用于施加机械力或操作机械装置，例如流体泵，马达或阀。 入口和出口通道将控制压力室分别连接到高压和低压。 在室内总体上具有平衡的压力并由磁敏材料构成的控制元件移动到与外部产生的磁场强度成比例的室内的固定位置。 至少一个通道与输出构件一起移动，以便通过控制元件相对于另一个通道打开或关闭。 输出构件跟随控制元件自动改变腔室中的压力以补偿其上的外力的任何变化。 输出构件包括杆状元件，该杆状元件在其侧面具有用于其中一个通道的端口，并且控制元件是围绕杆的套筒，并且可以由包括磁场或外部机械互连的任何外部控制的装置移动。

    Fail-fixed servovalve
    7.
    发明授权
    Fail-fixed servovalve 失效
    故障固定伺服阀

    公开(公告)号：US3922955A

    公开(公告)日：1975-12-02

    申请号：US43766774

    申请日：1974-01-29

    申请人： GEN ELECTRIC

    发明人： KAST HOWARD BERDOLT

    IPC分类号： F15B11/12 ,  F15B13/043 ,  F15B13/044 ,  F15B11/08

    CPC分类号： F15B11/128 ,  F15B13/0436 ,  Y10T137/86598 ,  Y10T137/86702

    摘要： A fail-fixed servovalve includes a jet pipe for discharging a pressurized liquid wherein the jet pipe may be selectively signaled to deflect and unbalance the pressures at opposing ends of a spool which would otherwise remain centered within a sleeve by resilient means at opposing ends thereof. The spool includes a plurality of circumferentially relieved areas interspaced between a plurality of lands with interconnecting passages therebetween wherein a servopiston may be actuated to move by pressurized liquid selectively received from the sleeve and spool such that a sudden loss of either the deflecting signal or the pressurized liquid would operate to block the flow of liquid to the servopiston, locking it in place.

    摘要翻译： 故障固定的伺服阀包括用于排出加压液体的喷射管，其中喷射管可以被选择性地发出信号，以使阀芯的相对端处的压力偏转和不平衡，否则阀芯的相对端处的弹性装置否则将保持在套筒内的中心。 卷轴包括多个沿周向释放的区域，间隔在具有互连通道之间的多个平台之间，其间可以通过选择性地从套筒和卷轴接收的加压液体致动伺服空间来移动伺服空间，使得偏转信号或加压 液体将操作以阻止液体流向伺服空间，将其锁定就位。

    Deflectable free jetstream-type two-stage servo valve
    8.
    发明授权
    Deflectable free jetstream-type two-stage servo valve 失效
    可自由喷射式两级伺服阀

    公开(公告)号：US3612103A

    公开(公告)日：1971-10-12

    申请号：US3612103D

    申请日：1969-07-01

    申请人： MOOG INC

    发明人： WADDINGTON MARTYN V

    IPC分类号： F15B13/043 ,  F15C1/04 ,  F16K11/00 ,  F15B13/044

    CPC分类号： F15B13/0436 ,  Y10T137/2213 ,  Y10T137/2322 ,  Y10T137/86606 ,  Y10T137/86614

    摘要： An easy to manufacture and service two-stage servo valve of the deflectable free jetstream-type is provided having a split body construction, part of which houses the second-stage or output valve spool which controls the flow of fluid through actuating ports with respect to supply and return ports, and the other part of which supports the jet deflector hydraulic amplifier and torque motor to constitute a separable first-stage assembly. Although there is mechanical force feedback between the valve spool and armature of the torque motor, the servo valve is so constructed that no feedback forces are transmitted through the jetstream deflector. This enables the deflector to be designed as a nonstructural element for ease of manufacture and made of a material having the desired physical characteristics such as one resistant to fluid erosion.