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机床液压操纵箱中的转阀,起换向、开停、调速及接通辅助动作油路的作用,使机床便于集中操纵,在液压传动的机床中应用广泛。它的结构比较复杂,在液压传动系统图中多用结构符号表示,即沿转阀阀芯轴线的若干个剖面图,图中标出油路连接的情况。为了解机床全部油路,看懂转阀油路图是个关键,也是较困难的问题。下面就以M 7120 A型平面磨床液压操纵箱中的几个转阀为例,介绍转阀油路的看图方法。图1是先导阀油路图。图中
Machine hydraulic control box in the rotary valve, starting to change, open stop, speed and connected to the auxiliary action of the role of oil, so that the machine easy to centralized control, hydraulic drive in a wide range of machine tools. Its structure is more complex, the hydraulic drive system diagram with more structural symbols, that is, along the spool valve core axis of a number of profiles, the figure marked the oil connection. In order to understand all the oil path of the machine tool, it is also a more difficult problem to understand the rotary valve oil path map. The following to M 7120 A-type surface grinder hydraulic control box in a few rotary valve, for example, introduce the diagram of rotary valve oil way. Figure 1 is the pilot valve circuit diagram. Figure