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    • 3. 发明公开
    • Hydraulic control system
    • 液压控制系统
    • EP0092972A2
    • 1983-11-02
    • EP83302247.8
    • 1983-04-20
    • FAIREY HYDRAULICS LIMITED
    • Fuell, Frederick James
    • F15B18/00
    • F15B18/00
    • A hydraulic control system is disclosed comprising two actuators operating in parallel or tandem each having a separate supply of hydraulic fluid and two electrohydraulic servo control valves interposed between each actuator and its respective hydraulic supply, each control valve having two operating coils for the electrical operation thereof, the said coils being connected to four electrical control lanes in such a manner that each lane is connected to one coil of a control valve asociated with one actuator and with one coil of a control valve associated with the other actuator. Feedback control of the valves is preferably provided to equalise hydraulic imbalance, the valves for each actuator having differing overlap characteristics such that the feedback signal may apply selectively to the valves of one or other actuator.
    • 公开了一种液压控制系统,其包括两个并联或串联操作的致动器,每个致动器具有单独的液压流体供应和两个电动液压伺服控制阀,插入在每个致动器与其相应的液压供应之间,每个控制阀具有用于其电操作的两个操作线圈 ,所述线圈连接到四个电控制通道,使得每个通道连接到与一个致动器相关联的控制阀的一个线圈以及与另一个致动器相关联的控制阀的一个线圈。 优选地提供阀的反馈控制以均衡液压不平衡,用于每个致动器的阀具有不同的重叠特性,使得反馈信号可以选择性地施加到一个或其他致动器的阀。
    • 9. 发明公开
    • Fluid valves
    • 流体阀
    • EP0198635A3
    • 1987-01-14
    • EP86302507
    • 1986-04-04
    • FAIREY HYDRAULICS LIMITED
    • Smith, John DenisDavis, Peter James
    • F16K31/06F15B13/043
    • F15B13/0442F15B13/0402F15B13/043F15B2013/0412F15B2013/0448H01F7/14
    • An electrohydraulic servo valve (10) comprises a pair of electric motors (11) mounted on the body - (13) of a linear hydraulic spool valve (12) and driving a common motor shaft (77) whose rotation is transmitted directly to the valve spool (20) by a pivoted lever (90), one end of which is engaged in a cross-bore (89) in the motor shaft (77) and the other end of which is engaged in a cross-bore (30) in the valve spool (20). The lever (90) is pivotally suspended by two integral rectangular-section thin steel strips projecting at right angle from opposite sides of the lever and secured by screwed-down integral mounting blocks (107) at their outer ends. The strips are arranged with their widths transverse to the length of the lever (90), and twist resiliently about their lengths as the lever pivots about a pivotal axis (92) coincident with the lengths of the strips (105,106) providing a frictionless pivotal suspension for the lever with a resilient centering action.
    • 扭矩马达设置在公共轴的每个端部,例如 用于驱动伺服阀。 电动机包括转子和定子。 优选地,转子在径向间隔的位置处承载至少一对钐钴永磁体,芯材设置在磁体之间。 这样的电动机可以相对紧凑,同时产生高扭矩。