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(接第六期)五、卷扬开式液压系统开式系统如图7所示.是指液压泵1从油箱5吸油,通过换向阀2给液压马达3(或液压缸)供油以驱动工作机构,液压马达回油再经换向阀回油箱。在泵出口处装溢流阀4。这种系统结构简单,工作完的油液流回油箱,油箱可以发挥散热、沉淀杂质的作用。但因油液常与空气接触易使空气渗入系统,应在油路上设置背压阀,这将引起附加的能量损失,使油温升高。
(Then the sixth period) V. Winch open hydraulic system Open system as shown in Figure 7. Hydraulic pump 1 is the oil from the tank 5, through the valve 2 to the hydraulic motor 3 (or hydraulic cylinder) to supply oil Drive the working organization, the hydraulic motor back to the oil through the valve back to the tank. In the pump outlet relief valve installed 4. The system structure is simple, the finished oil flow back to the tank, the tank can play the role of heat dissipation, precipitation impurities. However, because the oil often comes into contact with air, the air tends to infiltrate into the system. A back pressure valve should be installed on the oil path, which will cause additional energy loss and increase the oil temperature.