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    • 1. 发明授权
    • Hydraulic circuit for swivel working machine
    • 旋转加工机液压回路
    • US5291821A
    • 1994-03-08
    • US969161
    • 1993-02-11
    • Kohji YamashitaTeruo AkiyamaTadao KarakamaNaoki Isizaki
    • Kohji YamashitaTeruo AkiyamaTadao KarakamaNaoki Isizaki
    • E02F9/12E02F9/22F15B11/16
    • E02F9/123E02F9/2232E02F9/2285E02F9/2292E02F9/2296
    • A hydraulic circuit for a swivel working machine, in which the operation of the working unit is speeded up when the swiveling body and the working unit are simultaneously operated, includes, for this purpose, first and second operating valves (15.sub.1 and 15.sub.2) connecting the delivery conduit of a hydraulic pump (10) to a swiveling hydraulic motor (16.sub.1) and to a working unit cylinder (16.sub.2), and pressure compensating valves (18) provided between the first operating valve (15.sub.1) and the swiveling hydraulic motor (16.sub.1) and between the second operating valve (15.sub.2) and the working unit cylinder (16.sub.2), the load pressure of the swiveling hydraulic motor (16.sub.1) and the load pressure of the working unit cylinder (16.sub.2) being introduced into a load pressure introducing conduit (23) by way of check valves (42), the pressure compensating valves (18) being set by the load pressure of the load pressure introducing conduit (23), the check valve (42) for detecting the load pressure of the swiveling hydraulic motor (16.sub.1) being prevented from operating when the second operating valve (15.sub.2) is operated.
    • PCT No.PCT / JP92 / 00742 Sec。 371日期:1993年2月11日 102(e)日期1993年2月11日PCT提交1992年6月10日PCT公布。 出版物WO92 / 22712 PCT 日本1992年12月23日。一种用于旋转加工机的液压回路,其中当旋转体和工作单元同时操作时,加工单元的操作加速,包括第一和第二操作阀 将液压泵(10)的输出管道与旋转液压马达(161)连接到工作单元气缸(162)上的压力补偿阀(151和152)和设置在第一操作阀(151)之间的压力补偿阀(18) 和旋转液压马达161以及第二操作阀152和作业单元缸162之间,旋转液压马达161的负载压力和作业单元气缸162的负载压力为 通过止回阀(42)引入负载压力导入管道(23),压力补偿阀(18)由负载压力引入管道(23)的负载压力,用于检测的止回阀(42) s的负载压力 当第二操作阀(152)被操作时,防止液压马达(161)运转。