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    • 3. 发明申请
    • PILOT CONTROLLED SERVO-VALVE
    • 先导式伺服阀
    • WO1996015373A1
    • 1996-05-23
    • PCT/EP1995004454
    • 1995-11-13
    • HYDROLUX S.A.R.L.BOURKEL, ArsèneLANFERMANN, BerndTRATBERGER, KarlPOST, Karl-Heinz
    • HYDROLUX S.A.R.L.
    • F15B13/042
    • F15B13/0402Y10T137/86606Y10T137/86614
    • A pilot controlled servo-valve has four main flow connections (20, 22, 24, 26), an axially sliding main control piston (18) with four control edges (28', 30', 32', 34') and a front restoring spring (78) that defines a spring-centred middle position of the main control piston (18). A control sleeve (12) has ring-shaped openings (20', 22', 24') for the first, second and third main flow connections (20, 22, 24) and a front opening (26') for the fourth main flow connection (26). A first front face of the main control piston (18) is axially opposed to said opening (26'). A pressure compensating surface (60) is formed by the second front face of the main control piston (18)in a spring chamber (52). The main control piston (18) applies the pressure in the fourth main flow connection on said pressure compensating surface (60) through a pressure relief channel (44). A transverse bore (46) connects said pressure relief channel to an auxiliary connection chamber (36) connected to the third main flow connection (24) by the fourth control edge (34'). This valve may be space-savingly integrated in a hydraulic block and has a clearly defined middle position, as well as a remarkable dynamic performance.
    • 甲先导式伺服阀具有四个Haupstromanschlüssen(20,22,24,26),可轴向移动的主控制活塞(18)具有四个控制边缘(28“ 30' ,32”,34' )和前复位弹簧(78)具有弹簧为中心的中心位置 主控制活塞(18)被定义。 控制套筒(12)具有环形的入口(20”,22' ,24‘),用于在第一,第二和第三主流动部分(20,22,24)和一个前部开口(26’),用于第四主流部分(26), 该开口(26“)的主控制活塞(18)轴向相对的第一活塞端表面。 均压面(60)由在一个弹簧室(52)的主控制活塞(18)的第二活塞端面上形成,并且经由压力释放通道(44)通过装载有在第四主电源中的压力,主控制活塞(18)连接。 的横向孔(46)与经由第四控制边缘(34“)与所述第三主流动部分(24)连接的辅助端口腔室(36)连接该压力释放通道。 该阀可以被紧凑地集成到一个液压块,并具有明确定义的中心位置,和优异的动态行为。