阿特拉斯工程师定级液压3.pdf

Tramming motor circuit, open system开式输送马达系统
Circuit structure液压图
12
1.Tank油箱
9. Check valve单向阀
2. Electric motor电动马达
10. Brake Valve( pressure control valve)刹车阀
3.Pump泵
11. Hydraulic motor液压马达
4. Pressure control valve压力控制阀
12. Brake Valve( pressure control valve)刹车阀
5. Check valve单向阀
13. Check valve单向阀
6. Directional valve( proportiona』)比例方向阀14. Check valve单向阀
7. Check valve单向阀
15. Check valve单向阀
8.Non- return valve单向阀
With directional valve 6 the volume flow rate from the pump can be controlled so that the rotation speed and
the volume flow rate from the pump is stopped, and when operating downhill. Check valve 15 preven when
rotation direction of motor 11 is changed. The function of brake valves 10 and 12 is to brake the motor
hydraulic fluid being led to the tank through the suction line.通过方向阀6可以控制从泵流向马达的流量从而可
以调节马达11的转速,剤车阀10和12用来当泵停止工作时或下坡时给马达刹车,单向阀15用于防止液压汕由吸汕
管流回油箱。
Circuit function液压回路的功能
0
12
13
14
15
Neutral position中位
n neutra position the volume flow rate is led from the pump through the open centre in directional
valve 6 directly to the tank Hydraulic motor 11 is braked by brake valves 10 and 12 by means of
them locking s that hydraulic fluid cannot flow out from the motor. The hydraulic motor can
therefore not rotate because of external oad.当方向阀6处于中位时泵的输出由通过阀6的中位口
直接流回油箱,液压马达被利车阀10和12锁死,不能被外力转动。
In order to protect the circuit against damage if the pressure becomes too high, e.g. on a
downhill slope, the brake valves can open in the event of overpressure. Spring forces
determine at which pressure level the brake valves open.为了防止刹车回路油乐过高(在斜坡
上操作时)而损坏系统,刹年会在压力过高时打开剤年阀,弾箦F次定刹年阀打开的压力
The hydraulic flui hat leaks in the tramming motor is replaced through a suction line T. 1
达的泄漏油通过管T流回油箱。
P2
13
Tramming输送
When the directional valve 6 is in the position drawn the volume flow rate is led from the pump
through check valve 7, directional valve 6 and check valve 13 to the hydraulic motor. Brak
10 opens by means of pilot line P1 Brake valve 12 does not open from pilot pressure? valve
because it acts on a smaller piston area in the brake valve.当方向阀6处于上图位置时,泵的输出
液压油通过单向阀7,方向网6和单向阀13流向液压马达。刹车网10通过液控压力P1打开,刹车阀12
因P2压力不够因此不能开启。
The return flow from the motor flows through brake valve 10, via a non-return valve and
directional valve6 to the tank.马达的回油通过刹车阀10,单向阀和方向阀6回到汕箱
During braking while operating the flow to the motor is stopped with the directional valve Brake
valve 10 in the motors return circuit now starts to close, because it lacks pilot pressure P1. The
motor is braked by the return flow being stopped.刹车时泵的输出液压油被方向阀阻断,由于刹车阀
的液控压力不够因此刹车阀将关闭,液压马达由于回油油路关闭?而被锁死。