一、液压系统设计浅评长沙机床厂生产的B690液压牛头刨床,性能优良,位居国内同类产品前列。该机床液压系统设计有两大特点,其一是采用双定量泵组合变级油路,而不是采用大流量的单泵节流调速油路或价格昂贵的变量油泵; First, the hydraulic system design Comments Changsha Machine Tool Plant production B690 hydraulic shaper, excellent performance, ranking the forefront of similar products in China. The machine tool hydraulic system design has two main characteristics, one is the use of double quantitative pump combination of variable-grade oil, instead of using a large flow of single-pump throttling speed control circuit or expensive variable pump;