宝钢总厂引进的工程机械与倾翻载重车,其液压传动系广泛采用了一种比较新颖的双向平衡,结构如图1所示。这种双向平衡阀较之国内常规使用的二只单向平衡阀能使液压系统更趋于合理,结构更为紧凑,且配管减少,体积减小,工作更安全可靠。现对其结构动作原理分析如下。在机械作业时,搬动手动换向阀至上位(如图2所示),液压油经泵流出,通过换向阀 Baosteel Plant imported construction machinery and tipping trucks, hydraulic transmission system widely used a more novel two-way balance, the structure shown in Figure 1. Compared with the two one-way balance valves which are commonly used in China, the two-way balancing valve can make the hydraulic system more reasonable, the structure is more compact, and the piping is reduced, the volume is reduced, and the work is safer and more reliable. Now the principle of its structure is analyzed as follows. In mechanical work, move the manual valve to the upper position (as shown in Figure 2), the hydraulic oil flows out through the pump, through the valve