336F XE Excavator Machine System Caterpillar


Stick Drift Reduction Valve

Usage:

336F L XE DFY
斗杆沉降阻尼阀位于主控制阀与斗杆油缸之间的斗杆液压回路中。 当斗杆操纵手柄处于空档位置时,斗杆沉降阻尼阀阻止漏油。 斗杆沉降阻尼阀阻止斗杆油缸连杆端的机油泄漏。 停止泄油可防止斗杆沉降。

斗杆伸出




图 1g03005277

斗杆沉降阻尼阀(斗杆伸出)

(1) 油道

(2) 端口

(3) 斗杆连杆端压力传感器

(4) 油道

(5) 斗杆沉降阻尼电磁阀

(6) 滑阀

(7) 斗杆沉降阻尼阀

(8) 回油油道

(9) 阀

(10) 弹簧腔

(11) 弹簧

(12) 油道

(13) 负载单向阀

(14) 斗杆连杆端油缸至油箱滑阀

(15) 斗杆连杆端泵至油缸滑阀

(16) 油道

(17) 流量补偿器

斗杆伸出操作期间,机器 ECM 不启用电磁阀 (5) ,滑阀 (6) 不移动。

来自驱动泵和惰轮泵的油流在主控制阀中汇合。 汇合的油流进入油道 (16) 并流过流量补偿器 (17) 。 负载单向阀 (13) 开启,并允许泵油流过斗杆泵至油缸滑阀 (15) 。 由于油道 (1) 中的机油压力升高,阀 (9) 顶着弹簧 (11) 的弹力移动。 弹簧室 (10) 中的机油经过油道 (12) 和 (4) ,流向孔口 (2) 。 现在,油道 (1) 输送的机油经过孔口 (2) ,流向斗杆油缸的连杆端。

斗杆收回




图 2g03005296

斗杆沉降阻尼阀(斗杆进入)

(1) 油道

(2) 端口

(3) 斗杆连杆端压力传感器

(4) 油道

(5) 斗杆沉降阻尼电磁阀

(6) 滑阀

(7) 斗杆沉降阻尼阀

(8) 回油油道

(9) 阀

(10) 弹簧腔

(11) 弹簧

(12) 油道

(13) 负载单向阀

(14) 斗杆连杆端油缸至油箱滑阀

(15) 斗杆连杆端泵至油缸滑阀

(16) 油道

(17) 流量补偿器

斗杆缩回操作期间,机器 ECM 启用电磁阀 (5) ,滑阀 (6) 向下移动。 弹簧室 (10) 中的油流过油道 (12) 和滑阀 (6) 。 此时,弹簧室 (10) 中的油经回油道 (8) 流向液压油箱。

斗杆油缸连杆端的回油流进孔口 (2) 。 由于弹簧室 (10) 中的压力较低,孔口 (2) 中的机油顶着弹簧 (11) 的弹力移动阀 (9) 。 来自斗杆油缸连杆端的油经过孔口 (2) 、油道 (1) 、油缸至油箱滑阀 (14) 流回液压油箱。

斗杆保持




图 3g03005316

斗杆沉降阻尼阀(斗杆保持)

(1) 油道

(2) 端口

(3) 斗杆连杆端压力传感器

(4) 油道

(5) 斗杆沉降阻尼电磁阀

(6) 滑阀

(7) 斗杆沉降阻尼阀

(8) 回油油道

(9) 阀

(10) 弹簧腔

(11) 弹簧

(12) 油道

(13) 负载单向阀

(14) 斗杆连杆端油缸至油箱滑阀

(15) 斗杆连杆端泵至油缸滑阀

(16) 油道

(17) 流量补偿器

(18) 密封面

当操纵手柄移到空档位置时,斗杆油缸固定在伸出位置。 此动作允许阀 (9) 在弹簧力和弹簧室 (10) 中的油压作用下向右移动。 随后,阀 (9) 封住密封面 (18) 。 阀 (9) 阻止油从斗杆油缸连杆端泄漏。 停止泄油可防止斗杆沉降。

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