论文部分内容阅读
我所大修了一台东方红－７５推土机，其故障现象是：铲刀升起、操纵杆扳到中立位置后，液压缸在铲刀自重的作用下发生自然下沉。根据东方红－７５推土机液压系统工作原理分析，液压缸下沉的可能原因有：活塞上的油封损坏；缸壁严重拉伤；活塞杆与活塞之间的Ｏ形密封圈损坏；导
I overhauled a Dongfanghong-75 bulldozer. The fault phenomenon was that after the blade lifted and the joystick was moved to the neutral position, the hydraulic cylinder naturally sinks under the action of the blade’s own weight. According to the analysis of the working principle of the Dongfanghong-75 bulldozer hydraulic system, the possible causes of hydraulic cylinder sinking are: damage to the oil seal on the piston; serious damage to the cylinder wall; damage to the O-ring seal between the piston rod and the piston;