DBEM10-52/200YG24K4M

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PLUG CM11/RM3/MVB15PVH057R51AA10B252000001A E1AB01

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DBEM10-52/200YG24K4M

WMM手动阀

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R900534386 3WMM10B32/

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R900548479 4WMM6JA52/F/V

R900595131 4WMD10E32/F

R900595191 4WMD10D32/F

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Z2S单向阀

R900085134 Z2S16A3-52/V

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R900328798 Z2S16A1-52/

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R900346704 Z2S22A1-52/V

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R900407424 Z2S10A1-33/

R900407434 Z2S10B1-33/

R900407439 Z2S10-1-33/V

Z1S单向阀

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R900334981 Z1S10T3-33/V

R900334982 Z1S10C2-33/V

R900334984 Z1S10D2-33/V

R900334985 Z1S10D3-33/V

R900334988 Z1S10B2-33/V

R900334990 Z1S10P2-33/V

R900334991 Z1S10P3-33/V

R900334992 Z1S10E2-33/V

R900334994 Z1S10F2-33/V

R900334995 Z1S10F3-33/V

DBEM10-52/200YG24K4M

图3

4、电机启动，节流阀刚打开，阀口开度还较小时的状态

A：要注意的是，在刚开始很短的一段时间内，液压缸无杆腔内的压力还未能推动活塞杆运动时（V=0），即未有油液流动，此时为静力平衡状态。

液压缸无杆腔内的压力PL将通过负载反馈油口（见图4），等值传递到负载阀滑阀右端的弹簧腔内（帕斯卡原理，图中黄色箭头表示的是力的传递方向，并不代表油液流动方向）。此时负载阀阀芯两端受静压力作用P=PL，阀芯受到150PSI的弹簧力作用使负载阀工作在右位。导致主控制活塞缸无杆腔内的部分压力油通过泄油路接通油箱。复位活塞缸中的偏置弹簧力迫使斜盘顺时针旋转，液压泵开始向系统提供较大的流量。

B：当液压缸无杆腔内的油液压力不断上升，足以推动活塞杆向左移动时（V>0），液压泵将以较大的排量向液压缸供油。

尽管压力油也会流经节流口a，但由于该节流口很小，并不会在接通负载阀滑阀弹簧腔（泄油）的油路上造成可观的功率损失。

注意到节流阀上下两端的压力表间刚好存在着150PSI的压力差。液压油通过节流阀口后所剩余的压力（负载压力）、负载阀滑阀左端的压力（泵出口的压力）、150PSI的弹簧预紧力三者之间协同工作，使节流阀阀口前后压力差得以保持。对于不同的阀口开度，液压泵均可提供与之相适应的流量。

注意，作用在负载阀滑阀左端的178PSI压力抵抗着作用于右端的28PSI压力和150PSI弹簧力，28PSI加上150PSI刚好等于178PSI（这不是一个等式，却是一种作用机理）。