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1.行走液压系统工作原理履带式液压挖掘机主泵和先导泵分别输出工作压力油和先导压力油。操纵行走先导手柄接通先导压力油,推动左(右)行走主阀阀芯滑动。工作压力油通过左(右)行走主阀阀芯和主阀阀体油道、管路和中央回转接头到达左(右)行走马达。行走马达转动,驱动履带行走装置,实现挖掘机前进、后退和转向功能。挖掘机行走液压系统工作原理如图1所示。中央回转接头连接挖掘机上、下机体油路,其由壳体和芯轴2部分组成。芯轴安装在下部机体上,壳体安装在上部机体上,芯轴上开有环
1. Walking hydraulic system works Crawler hydraulic excavator main pump and pilot pump respectively output working pressure oil and pilot pressure oil. Operate the pilot handle to connect the pilot pressure oil and push the left (right) main valve spool to slide. The working pressure oil travels to the left (right) travel motor via the left (right) travel of the main valve spool and main valve body oil passages, piping and central swivel. Walking motor rotation, driving crawler walking device to achieve excavator forward, reverse and steering functions. Excavator walking hydraulic system working principle shown in Figure 1. The central rotary joint is connected with the upper and lower body oil passages of the excavator, and is composed of a shell body and a mandrel 2 part. The mandrel is installed on the lower body, the shell is mounted on the upper body, and a ring is formed on the mandrel