柱塞泵根据倾斜元件的不同,有斜盘式和斜轴式两种。斜盘式是斜盘相对回转的缸体有一倾斜角度,而引起柱塞在泵缸中往复运动。传动轴轴线和缸体轴线是一致的。这种结构较简单,转速较高,但工作条件要求高,柱塞端部与斜盘的接触部往往是薄弱环节。斜轴式的斜盘轴线与传动轴轴线是一致的。它是由于柱塞缸体相对传动轴倾斜一角度而使柱塞作往复运动。流量调节依靠摆动柱塞缸体的角度来实现,故有的又称摆缸式。它与斜盘式相比,工作可靠,流量大,但结构复杂。
轴向柱塞泵与径向柱塞泵比较,排出压力高,它一般可在20~50MPa范围内工作,效率也高,径向尺寸小、结构紧凑、体积小、重量轻。但结构较径向柱塞泵复杂,加工制造要求高,价格较贵。
轴向柱塞泵一般用于机床、冶金、锻压、矿山及起重机械的液压传动系统中,特别广泛地应用于大功率的液压传动系统中。为了提率,在应轴向柱塞泵一般都由缸体、配油盘、柱塞和斜盘等主要零件组成。缸体内有多个柱塞,柱塞是轴向排列的,即柱塞的中心线平行于传动轴的轴线,因此称它为轴向柱塞泵。但它又不同于往复式柱塞泵,因为它的柱塞不仅在泵缸内做往复运动,而且柱塞和泵缸与斜盘相对有旋转运动。柱塞以一球形端头与斜盘接触。在配油盘上有高低压月形沟槽,它们彼此由隔墙隔开,保证一定的密封性,它们分别与泵的进油口和出油口连通。斜盘的轴线与缸体轴线之间有一倾斜角度。
轴向柱塞泵的工作原理所示,当电动机带动传动轴旋转时,泵缸与柱塞一同旋转,柱塞头永远保持与斜盘接触,因斜盘与缸体成一角度,因此缸体旋转时,柱塞就在泵缸中做往复运动。以图l—40的下一柱塞为例,它从0°转到180°,即转到上面柱塞的位置,柱塞缸容积逐渐增大,因此液体经配油盘的吸油口a吸人油缸;而该柱塞从180°转到360°时,柱塞缸容积逐渐减小,因此油缸内液体经配油盘的出口排出液体。只要传动轴不断旋转,泵便不断地工作。
改变倾斜元件的角度,就可以改变柱塞在泵缸内的行程长度,即可改变泵的流量。倾斜角度固定的称为定量泵,倾斜角度可以改变的便称为变量泵。
力士乐BOSCH-REXROTH轴向柱塞泵
力士乐BOSCH-REXROTH轴向柱塞泵型号如下:柱塞泵A4VG90HWD1/32R-NZF001S
柱塞泵A4VTG90HW/32R-NLD10F001S
轴向柱塞泵A4VSO125DR/PPB13NOO
变量轴向柱塞泵A4VSO180DR/30R-PPB13N00
变量轴向柱塞泵A4VSO125DR/30R-PPB13N00
柱塞泵A4VS0125DR/10R-PPB13N00
柱塞泵A4VS071DR/10R-PPB13N00
柱塞泵A4VS0125DR/22R
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变量轴向柱塞泵A4VSO180DR/30R-PPB13N00
变量轴向柱塞泵A4VSO125DR/30R-PPB13N00
油泵A4VSO180DFR/30R-PPB13N00
柱塞泵A4VS0180DR/30R-PPB13N00
轴向柱塞泵主泵A4VS0125DRG/30R-PPB13N00
油泵A4VS071DR/30R-PPB13N00
德国力士乐A4VG-125泵的配件主轴080121-001#
轴向柱塞泵E-A4VSO250EO2/30R-VPB25N00-SO3
轴向柱塞泵E-A4VSO250EO2/30R-VPB25N00-SO3
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轴向柱塞泵A4VS07IDR/3XR
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