Counterbalance valve
    51.
    发明授权
    Counterbalance valve 失效
    反平衡阀

    公开(公告)号:US5113894A

    公开(公告)日:1992-05-19

    申请号:US635618

    申请日:1990-12-20

    申请人: Toshiyuki Yoshida

    发明人: Toshiyuki Yoshida

    摘要: A counterbalance valve for use in drive oil hydraulic circuitry of an oil hydraulic motor is constructed so that an oil hydraulic motor can slow down without shock, while cavitation is prevented, thus coming to rest in a short period time. A spool (26) is retained by springs in a neutral position. Pressurized oil in a left pressure receiving chamber (28) moves the spool (26) to a first position in which the port (23) on the second pump side is connected to the port (25) on the second motor side, whereas pressurized oil in a right pressure receiving chamber (29) moves the spool (26) to a second position in which the port (22) on the first pump side is connected to the port (24) on the first motor pump side. Throttle apertures (37, 38, 39) are arranged between the left pressure receiving chamber (28) and the port (22) on the first pump side, and throttle apertures (37, 38, 39) are also arranged between the right pressure receiving chamber (29) and the port (23) on the second pump side. When said spool (26) is in the first and second positions, the connection areas of the throttle apertures are maximum areas; when said spool (26) moves a little toward a neutral position, the connection areas become minimum areas; and when said spool (26) further moved toward the neutral position, the connection areas become intermediate areas.

    摘要翻译: PCT No.PCT / JP90 / 00516 Sec。 371 1990年12月20日第 102(e)1990年12月20日日期PCT提交1990年4月20日PCT公布。 WO90 / 12973 PCT出版物 日期为1990年11月1日。用于油压马达的驱动油液压回路中的平衡阀被构造成使得油压马达可以在没有冲击的情况下减速,同时防止空化,从而在短时间内休息 。 阀芯(26)由弹簧保持在中立位置。 左压力接收室(28)中的加压油将阀芯(26)移动到第二泵侧的端口(23)连接到第二电动机侧的端口(25)的第一位置,而加压油 在右压力接收室29中,将阀芯26移动到第一泵侧的端口22与第一泵侧的端口22连接的第二位置。 节流孔(37,38,39)设置在第一泵侧的左压力接收室(28)和端口(22)之间,并且节流孔(37,38,39)也布置在右压力接收 室(29)和第二泵侧的端口(23)。 当所述卷轴(26)处于第一和第二位置时,节流孔的连接区域是最大面积; 当所述线轴(26)稍微向中性位置移动时,连接区域成为最小区域; 并且当所述卷轴(26)进一步朝向中立位置移动时,连接区域成为中间区域。