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1.液压缸进入空气在维修挖掘机液压系统过程中,常会造成液压缸内进入空气。这些空气在受到活塞挤压后,温度可瞬间上升至600～800℃,变成高温、高压气体。该高温高压气体产生的不良后果有二:一是将缸盖密封圈烧蚀,造成缸盖与缸筒贴合面漏油;二是导致缸筒口部胀大(0.20～0.80 mm),严重时甚至可将缸体烧蚀。液压缸内部进入空气时的工作状态如图1所示。为此,在更换液压缸及液压管路后,必须彻底排除液压缸及液压管路中的空气。具体排气方法如下:首先让有杆腔低速进油,并满行程往复运行10～
1. Hydraulic cylinder into the air in the maintenance of excavator hydraulic system, often resulting in the hydraulic cylinder into the air. The air is squeezed by the piston, the temperature can instantly rise to 600 ~ 800 ℃, into a high temperature, high pressure gas. The high temperature and pressure gases have two adverse consequences: First, the cylinder head seal ablation, resulting in leakage of cylinder head and cylinder fitting surface; the second is caused by the cylinder mouth swollen (0.20 ~ 0.80 mm), serious The cylinder can even be ablated. Hydraulic cylinder into the air when the working state shown in Figure 1. For this reason, the air in the hydraulic cylinder and the hydraulic line must be completely eliminated after the hydraulic cylinder and the hydraulic line are replaced. Specific exhaust method is as follows: First, let the rod chamber low speed into the oil, and full stroke reciprocating 10 ~