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    • 3. 发明公开
    • SERVO VALVE SPOOL
    • 伺服阀线轴
    • EP3284955A1
    • 2018-02-21
    • EP16461552.8
    • 2016-08-18
    • Hamilton Sundstrand Corporation
    • Plucinski, WojciechBielen, MichalNowak, Michal
    • F15B13/043F16K31/124F15B9/06
    • F16K11/0708F15B9/06F15B13/0402F15B13/042F15B13/0436F15B13/0438F15B13/044F16K31/04F16K31/124F16K31/426Y10T137/0486Y10T137/86598
    • A spool assembly (100) for a second stage of a servo valve comprises a spool (110) having an axis (L) and an opening (112) for a feedback member (200) provided in a central region (114) of the spool extending perpendicular to the axis. An adjustable joint (120) is provided within the spool for securing a feedback member relative to the spool, comprising first and second jaw arms (122, 123) being displaceable relative to each other along the axis of the spool. The jaw arms have opposing clamping surfaces, wherein the clamping surfaces are arranged to be drawn towards each other as the jaw arms are drawn away from each other, such that a feedback member can be clamped between the opposed clamping surfaces of the jaw arms and thereby secured relative to the spool. The first jaw arm may extend from a first spool end (116) to the central region and the second jaw arm may extend from a second spool end (118) to the central region, each jaw arm providing a tensioning portion (124, 125) in the spool end and a head portion (126, 127; 401, 402) in the central region. The head portions of the first and second jaw arms may each provide a head (126a, 127a; 401 a, 402a); the head of one jaw arm may be positioned beyond the head of the other jaw arm in a direction along the axis of the spool, the head having the clamping surface. The heads may be arranged to be drawn towards each other when under tension from the tensioning portion.
    • 用于伺服阀的第二级的阀芯组件(100)包括具有轴线(L)和用于设置在阀芯的中心区域(114)中的反馈构件(200)的开口(112)的阀芯(110) 垂直于轴线延伸。 一个可调节的接头(120)设置在阀芯内,用于相对于阀芯固定一个反馈件,包括可沿着阀芯的轴线相对于彼此移动的第一和第二钳臂(122,123)。 爪臂具有相对的夹紧表面,其中夹紧表面布置成当爪臂彼此远离时彼此相向拉动,使得反馈构件能够夹紧在爪臂的相对的夹紧表面之间并由此 相对于线轴固定。 第一钳臂可以从第一阀芯端部(116)延伸到中心区域,并且第二钳臂可以从第二阀芯端部(118)延伸到中心区域,每个钳臂提供张紧部分(124,125) 在所述中央区域中的所述线轴端部和头部(126,127; 401,402)中。 第一和第二钳夹臂的头部分别可以提供头部(126a,127a; 401a,402a); 一个爪臂的头部可以沿着该线轴的轴线的方向定位在另一个爪臂的头部之外,该头部具有夹紧表面。 头部可以布置成在张力部分受到张力时彼此相向拉动。