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(三)配套油泵和预应力千斤顶配套使用的液压泵是液压拉伸机的动力和操纵设备,这类油泵具有超高压、小流量、泵阀油箱配套和可移动等特点。一般由动力源、泵头、组合阀、压力表、油箱、油管和接头等组成。其用途除与预应力千斤顶配套外,还可作为液压镦头器、举重、顶推、加荷千斤顶和其它液压机具(剪筋机、弯筋机等)的动力操纵装置。配套油泵按动力方式分为手动和电动两类。
(3) The hydraulic pump supporting the use of supporting oil pumps and prestressed jacks is the power and control equipment of the hydraulic stretching machine. This type of oil pump has the features of ultra high pressure, small flow, matching and removable of the pump valve tank. Generally by the power source, pump head, combination valve, pressure gauge, fuel tank, tubing and fittings and other components. In addition to its use with prestressed jacks, it can also be used as a power steering device for hydraulic boring heads, weight lifting, jacking, loading jacks and other hydraulic tools (stripping machine, bending machine, etc.). Supporting pumps are divided into manual and electric types according to the power mode.