中小马力行走机械,由于主机成本不高,要求与其配套的液压元件比较便宜;地质钻机、矿山设备运输条件差,往往要人抬肩抗,对重量指标很敏感;还有许多设备,如机床、化工设备,对工作压力要求不高,这些都要求我们研制出一种压力级别不高、结构简单、体积小、重量轻、造价低的经济型柱塞泵,一般统 Small horsepower walking machinery, due to the host cost is not high, requiring its supporting hydraulic components cheaper; geological drilling rigs, mining equipment, poor transportation conditions, often people shoulder resistance, weight indicators are very sensitive; there are many equipment, such as machine tools, Chemical equipment, less demanding on the work pressure, which require us to develop a pressure level is not high, simple structure, small size, light weight, low cost economical piston pump, the general system