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1. 发明公开

EP0399044A1 HYDRAULIC SERVO VALVE 失效
标题翻译：液压伺服电机。
公开(公告)号：EP0399044A1
公开(公告)日：1990-11-28
申请号：EP89900147.3
申请日：1988-12-02
申请人： EBARA RESEARCH CO., LTD. , URATA, Eizo
发明人： URATA, Eizo , MIYAKAWA, Shinpei
IPC分类号： F15B13/043
CPC分类号： F15B13/12 , F15B13/0402 , F15B21/06 , Y10T137/8659 , Y10T137/86598 , Y10T137/87201 , Y10T137/87209
摘要： This invention relates to a hydraulic servo valve comprising spools (10, 10R, 10L) which undergo displacement inside a valve body (1), switch the direction of an operating fluid and change its flow rate; nozzle back-pressure chambers (18, 18R, 18L) to which a pilot pressure for causing displacement of the spools (10, 10R, 10L) is applied; and a flapper mechanism consisting of nozzles (19, 19R, 19L) and ,flappers (20, 20R, 20L). Static pressure bearings 1( 1 4R, 1 4L, 141R, 141L, 142R, 142L) are formed at both ends of the spools (10, 10R, 10L) so as to define the passage of the operating fluid extending from a pump port (P) to the nozzle back-pressure chambers (18, 18R, 18L) through the static pressure bearings (14R, 14L, 141 R, 141L, 142R, 142L).
摘要翻译：在阀体（1）内发生位移的流体（10,10R，10L）切换工作流体的方向并改变流量。当施加先导压力时，喷嘴背压室（18,18R，18L）引起阀芯（10,10R，10L）的位移。挡板机构由喷嘴（19,19R，19L）和挡板（20,20R，20L）组成。静压轴承（14R，14L，141R，141L，142R，142L）形成在阀芯（10,10R，10L）的两端，以便限定从泵口（P）延伸的工作流体到通过静压轴承（14R，14L，141R，141L，142R，142L）的喷嘴背压室（18,18R，18L）。

2. 发明授权

EP0399044B1 HYDRAULIC SERVO VALVE 失效
标题翻译：电液伺服阀。
公开(公告)号：EP0399044B1
公开(公告)日：1994-05-18
申请号：EP89900147.3
申请日：1988-12-02
申请人： EBARA RESEARCH CO., LTD. , URATA, Eizo
发明人： URATA, Eizo , MIYAKAWA, Shinpei
IPC分类号： F15B13/043
CPC分类号： F15B13/12 , F15B13/0402 , F15B21/06 , Y10T137/8659 , Y10T137/86598 , Y10T137/87201 , Y10T137/87209
摘要： This invention relates to a hydraulic servo valve comprising spools (10, 10R, 10L) which undergo displacement inside a valve body (1), switch the direction of an operating fluid and change its flow rate; nozzle back-pressure chambers (18, 18R, 18L) to which a pilot pressure for causing displacement of the spools (10, 10R, 10L) is applied; and a flapper mechanism consisting of nozzles (19, 19R, 19L) and flappers (20, 20R, 20L). Static pressure bearings (14R, 14L, 141R, 141L, 142R, 142L) are formed at both ends of the spools (10, 10R, 10L) so as to define the passage of the operating fluid extending from a pump port (P) to the nozzle back-pressure chambers (18, 18R, 18L) through the static pressure bearings (14R, 14L, 141R, 141L, 142R, 142L).

3. 发明公开

EP0399044A4 HYDRAULIC SERVO VALVE 失效
标题翻译：液压伺服阀
公开(公告)号：EP0399044A4
公开(公告)日：1991-01-16
申请号：EP89900147
申请日：1988-12-02
申请人： EBARA RESEARCH CO., LTD. , URATA, EIZO
发明人： URATA, EIZO , MIYAKAWA, SHINPEI
IPC分类号： F15B13/04 , F15B13/12 , F15B21/06 , F15B13/043
CPC分类号： F15B13/12 , F15B13/0402 , F15B21/06 , Y10T137/8659 , Y10T137/86598 , Y10T137/87201 , Y10T137/87209
摘要： This invention relates to a hydraulic servo valve comprising spools (10, 10R, 10L) which undergo displacement inside a valve body (1), switch the direction of an operating fluid and change its flow rate; nozzle back-pressure chambers (18, 18R, 18L) to which a pilot pressure for causing displacement of the spools (10, 10R, 10L) is applied; and a flapper mechanism consisting of nozzles (19, 19R, 19L) and flappers (20, 20R, 20L). Static pressure bearings (14R, 14L, 141R, 141L, 142R, 142L) are formed at both ends of the spools (10, 10R, 10L) so as to define the passage of the operating fluid extending from a pump port (P) to the nozzle back-pressure chambers (18, 18R, 18L) through the static pressure bearings (14R, 14L, 141R, 141L, 142R, 142L).

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