论文部分内容阅读
1.平衡阀的3种功能(1)在汽车起重机的伸缩、变幅、起升3种机构中,平衡阀前端(油源方向)经高压软管与中心回转接头、操纵阀相连,后端经高压钢管与执行元件、液压缸或马达相连。当机构运动方向与负载重力作用方向相反时,即当外伸、起升、变幅缸上举时,平衡阀只起通路作用,同时,执行元件有杆腔液压油经另一条油路流回油箱;当平衡阀与手动换向阀之间的管路(多为高压软管)损坏漏油时,平衡阀能封闭无杆腔油液,使负载停留在空中原位置不动,避免造成坠落事故,可起到安全保护作用。
1. Balance valve three kinds of functions (1) crane crane telescopic, luffing, lifting three institutions, the balance valve front (oil source direction) by the high-pressure hose and the central rotary joint, the control valve connected to the back end The high-pressure steel pipes and actuators, hydraulic cylinders or motors connected. When the movement direction of the mechanism is opposite to the gravity direction of the load, that is, when the extension, lifting and luffing cylinder are on the lift, the balancing valve only acts as a passage, meanwhile, the hydraulic oil in the rod with the actuating element flows back through the other oil path When the pipeline between the balance valve and the manual reversing valve is damaged (mostly high pressure hose), the balance valve can close the oil in the rodless chamber to keep the load in the air and keep the original position from falling Accident, can play a safety role.