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液压泵原理
是为液压传动提供加压液体的一种液压元件，是泵的一种。它的功能是把动力机(如电动机和内燃机等)的机械能转换成液体的压力能。图中为单柱塞泵的工作原理。凸轮由电动机带动旋转。当凸轮推动柱塞向上运动时，柱塞和缸体形成的密封体积减小，油液从密封体积中挤出，经单向阀排到需要的地方去。当凸轮旋转至曲线的下降部位时，弹簧迫使柱塞向下，形成一定真空度，油 箱中的油液在大气压力的作用下进入密封容积。凸 轮使柱塞不断地升降，密封容积周期性地减小和增 大，泵就不断吸油和排油。
液压泵是液压系统的动力元件，其功用是给液压系统提供压力油，从能量转换角度讲，它将是原动机（如发动机）输出的机械能转换为便于输送的液体的压力能。液压马达则属于执行元件，它能将输入液体的压力能转换为输出轴转动的机械能，用来拖动负载做功。根据结构形式，液压泵与液压马达具体可分为齿轮式、叶片式、柱塞式等类型。
1.液压泵压力
液压泵工作压力是指泵（或马达）在实际工作时输出（或输入）油液的压力，由外负载决定。
额定压力是指在正常工作条件下，按试验标准规定能连续运转的高压力。其大小受寿命的限制，若超过额定压力工作，泵（或马达）的使用寿命将会比设计的寿命短。当工作压力大于额定压力时称超载。
2.转速
工作转速是指泵（或马达）在工作时的实际转动速度。
额定转速是指在额定压力下，能连续长时间正常运转的高转速。若泵超过额定转速工作将会造成吸油不足，产生振动和大的噪声，零件会遭受气蚀损伤，寿命降低。
低稳定转速是指马达正常运转所允许的低转速。在此转速下，马达不出现爬行现象。
3.排量、流量
排量是指泵（或马达）每转一周，由密封容腔几何尺寸变化而得的排出（或输入）液体的体积，常用单位是ml/r（毫升/转）。排量可以通过调节发生变化的成为变量泵（或变量马达），排量不能变化的成为定量泵（或定量马达）。
实际流量是指泵（或马达）工作时出口处（或进口处）的流量。由于泵本身存在内泄漏，其实际流量小于理论流量。由于马达本身也存在内泄漏，要实现指定转速，为补偿泄漏量，其输入实际流量必须大于理论流量。
4.效率
容积效率，对液压泵是指其实际流量与理论流量的比值。对液压马达是指其理论流量与实际流量的比值。
机械效率，对液压泵是指其理论转矩与实际输入转矩的比值。对液压马达其实际输出的转矩为理论转矩克服摩擦力后的转矩，因此其机械效率为实际输出转矩与理论转矩的比值。
总效率是指泵（或马达）的输出功率与输入功率的比值。总效率等于容积效率与机械效率的乘积。
力士乐叶片泵PV7-1A/10-20RE01MC0-10
德国力士乐REXROTH叶片泵订货号物料号和型号：
R900534143 PV7-1A/10-20RE01MC0-10
R987179771 PV7-1A/10-20RE01MC0-10HAMERSLAGGRIJS
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R987067707 PV7-1A/10-20RE01MC010+1PF2G2-4X/08RR20MR
R987074006 PV7-1A/10-20RE01MC010+AZPF-11-008RRR20MB
R987136850 PV7-1A/10-20RE01MC010+R4/1,00-450WG01M01
R900538125 PV7-1A/10-20RE01MC3-10
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R900700454 PV7-1A/10-20RE01MD5-10
R901043560 PV7-1A/10-20RE01MW0-10WH
R987067102 PV7-1A/100-118RE07MC0+ PV7-63-71RE07MC0
R987068626 PV7-1A/100-118RE07MC0+ PV7-63-71RE07MC0
R900506809 PV7-1A/100-118RE07MC0-16
R987074658 PV7-1A/100-118RE07MC0-16LIM83CC.
R987062892 PV7-1A/100-118RE07MC0-16LIM.80CC.
R987072990 PV7-1A/100-118RE07MC0-16+16-20RE01MC0-16
R987066407 PV7-1A/100-118RE07MC0-16+20-25RA01MA0-05
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R900511215 PV7-1A/100-118RE07MC3-16
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R900950061 PV7-1A/100-118RE07MC5-16WG
R900556803 PV7-1A/100-118RE07MC5-16WH
R901183579 PV7-1A/100-118RE07MC5-16WH-P125Q116
R900961521 PV7-1A/100-118RE07MC6-16
R987066964 PV7-1A/100-118RE07MC6-16+100-118RE07MC6*
R900533637 PV7-1A/100-118RE07MC7-16
R901348138 PV7-1A/100-118RE07MC7-16WG
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R987065682 PV7-1A/100-118RE07MCO+V5-1X-193/RJ15DMC
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R900950419 PV7-1A/100-118RE07MD0-16-A234
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R901400470 PV7-1A/100-118RE07MD0-16-P30Q165-A517
R901404706 PV7-1A/100-118RE07MD0-16-Q120
R987066526 PV7-1A/100-118RE07MD016+V1-1X/036RJ15UMB
R901101367 PV7-1A/100-118RE07MD3-16
R900949187 PV7-1A/100-118RE07MD6-16
R900928704 PV7-1A/100-118RE07MN0-16
R900519411 PV7-1A/100-118RE07MN5-16
R901061279 PV7-1A/100-118RE07MW0-16WG
R901429723 PV7-1A/100-118RE07MW0-16WG-P30P100Q120
R900740824 PV7-1A/100-118RE07MW0-16WH
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R901413656 PV7-1A/100-118RE07MW5-16WG-P20P80Q170
R901129340 PV7-1A/100-118RE07MW6-16WH
R900561846 PV7-1A/100-150RE07MC0-08
R900973548 PV7-1A/100-150RE07MC0-08-A184
R901047738 PV7-1A/100-150RE07MC0-08-A446
R901173632 PV7-1A/100-150RE07MC0-08-A464
R901384145 PV7-1A/100-150RE07MC0-08-C3.1
R901392573 PV7-1A/100-150RE07MC0-08-P35
R900961350 PV7-1A/100-150RE07MC3-08
R900560629 PV7-1A/100-150RE07MC5-08
R900761807 PV7-1A/100-150RE07MC5-08WG
R900948299 PV7-1A/100-150RE07MC5-08WH
R900577850 PV7-1A/100-150RE07MC7-08
R901366181 PV7-1A/100-150RE07MC7-08WH
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R901439483 PV7-1A/100-150RE07MD0-08-A184
R900910479 PV7-1A/100-150RE07MD5-08
R900781572 PV7-1A/100-150RE07MN0-08
R901059507 PV7-1A/100-150RE07MW0-08WH
R900580382 PV7-1A/16-20RE01MC0-16
R987065773 PV7-1A/16-20RE01MC0-16LIM17CC
R987066114 PV7-1A/16-20RE01MC0-16LIM20CC
R900517795 PV7-1A/16-20RE01MC0-16-A184
R901370386 PV7-1A/16-20RE01MC0-16-C3.1
R901412083 PV7-1A/16-20RE01MC0-16-P100
R901406649 PV7-1A/16-20RE01MC0-16-P110
R901417552 PV7-1A/16-20RE01MC0-16-P120
R901405871 PV7-1A/16-20RE01MC0-16-P52
R901339145 PV7-1A/16-20RE01MC0-16-P70Q20
R987119852 PV7-1A/16-20RE01MC016+ PV7-16-20RE01MC016
R987074165 PV7-1A/16-20RE01MC016+PVV1-1X/018RJ15DMB
R987066162 PV7-1A/16-20RE01MC016+V7/10-14RE01MC016
R987046365 PV7-1A/16-20RE01MC016+V7/16-20RE01MC16
R900592237 PV7-1A/16-20RE01MC3-16
R900616890 PV7-1A/16-20RE01MC3-16-A184
R901391674 PV7-1A/16-20RE01MC3-16-C3.1
R901429722 PV7-1A/16-20RE01MC3-16-P50Q25
R900506473 PV7-1A/16-20RE01MC5-16
R900934651 PV7-1A/16-20RE01MC5-16WG
R900926429 PV7-1A/16-20RE01MC5-16WH
R900748912 PV7-1A/16-20RE01MC6-16
R900534412 PV7-1A/16-20RE01MC7-16
R901163663 PV7-1A/16-20RE01MC7-16WH
R901161166 PV7-1A/16-20RE01MC8-16
R900509274 PV7-1A/16-20RE01MD0-16
R987179769 PV7-1A/16-20RE01MD0-16HAMERSLAGGRIJS
R900573212 PV7-1A/16-20RE01MD0-16-A234
R901284711 PV7-1A/16-20RE01MD0-16-Q25
R900511987 PV7-1A/16-20RE01MD3-16
R901134661 PV7-1A/16-20RE01MD6-16
R987196702 PV7-1A/16-20RE01MD6-16
R900939159 PV7-1A/16-20RE01MN0-16
R900733270 PV7-1A/16-20RE01MW0-16
R900721670 PV7-1A/16-20RE01MW0-16WG
R900722117 PV7-1A/16-20RE01MW0-16WH
R900533582 PV7-1A/16-30RE01MC0-08
R900757582 PV7-1A/16-30RE01MC0-08-A184
R901320920 PV7-1A/16-30RE01MC0-08-A474
R987127040 PV7-1A/16-30RE01MC008+PGH2-2X/008RR07VU2
R900533296 PV7-1A/16-30RE01MC3-08
R900930106 PV7-1A/16-30RE01MC5-08
R900967123 PV7-1A/16-30RE01MC5-08WG
R900245924 PV7-1A/16-30RE01MC5-08WH
R901023894 PV7-1A/16-30RE01MC7-08
R900560658 PV7-1A/16-30RE01MD0-08
R901226880 PV7-1A/16-30RE01MN0-08
R901231523 PV7-1A/16-30RE01MW0-08WH
R900580383 PV7-1A/25-30RE01MC0-16
R987064563 PV7-1A/25-30RE01MC0-16LIM.28CC
R987066596 PV7-1A/25-30RE01MC0-16PMAX=60BAR
R987255802 PV7-1A/25-30RE01MC0-16+ PV7-1A/10-14RE**
R987070149 PV7-1A/25-30RE01MC0-16+V7-1X/16-20RE01**
R900523267 PV7-1A/25-30RE01MC0-16-A184
R900965089 PV7-1A/25-30RE01MC0-16-A234
R901381715 PV7-1A/25-30RE01MC0-16-P100Q36
R987066541 PV7-1A/25-30RE01MC016+1PF2G2-4X/08RR20MR
R987306462 PV7-1A/25-30RE01MC016+AZPF10-008RRR20MB
R900586235 PV7-1A/25-30RE01MC3-16
R900517464 PV7-1A/25-30RE01MC5-16
R900919510 PV7-1A/25-30RE01MC5-16WG
R900933323 PV7-1A/25-30RE01MC5-16WH
R901086789 PV7-1A/25-30RE01MC5-16WH-A234
R901375575 PV7-1A/25-30RE01MC6-16
R900941543 PV7-1A/25-30RE01MC7-16
R987410063 PV7-1A/25-30RE01MCO16+PVV21X068RJ15DMB
R900509506 PV7-1A/25-30RE01MD0-16
R987065930 PV7-1A/25-30RE01MD0-16+ PV7/25-30RE01MD0
R900920739 PV7-1A/25-30RE01MD0-16-A234
R901382863 PV7-1A/25-30RE01MD5-16WH
R901022287 PV7-1A/25-30RE01MN0-16
R900768658 PV7-1A/25-30RE01MW0-16
R900744495 PV7-1A/25-30RE01MW0-16WH
R900705426 PV7-1A/25-30RE01MW5-16WH
R900534508 PV7-1A/25-45RE01MC0-08
R901411159 PV7-1A/25-45RE01MC0-08-P25Q50
R987277980 PV7-1A/25-45RE01MC008+AZPF10-005RRR20MB
R987070684 PV7-1A/25-45RE01MC008+HY/ZFS11/4R213
R900538525 PV7-1A/25-45RE01MC3-08
R900535532 PV7-1A/25-45RE01MC5-08
单作用叶片泵
单作用叶片泵的定义:叶片在离力和压力油的作用下，尖部紧贴在定子内表面上。通过改变两个叶片与转子和定子内表面所构成的工作容积大小变化，完成吸油排油过程，且叶片旋转一周，完成一次吸油与排油的叶片泵。
特点:
1.泵每转一转，每个密封腔吸油压油一次
2.转子上受液压不平衡力，为非平衡式泵
3.改变偏心距大小，可改变排量，为变量泵
单作用叶片泵的工作原理
泵由转子1、定子2、叶片3、配油盘和端盖等部件所组成。定子的内表面是圆柱形孔。转子和定子之间存在着偏心。叶片在转子的槽内可灵活滑动，在转子转动时的离心力以及通入叶片根部压力油的作用下，叶片顶部贴紧在定子内表面上，于是两相邻叶片、配油盘、定子和转子间便形成了一个个密封的工作腔。
当转子按逆时针方向旋转时，右侧的叶片向外伸出，密封工作腔容积逐渐增大，产生真空，于是通过吸油口和配油盘上窗口将油吸入。而在图的左侧。叶片往里缩进，密封腔的容积逐渐缩小，密封腔中的油液经配油盘另一窗口和压油口1被压出而输出到系统中去。
工作过程分析
单作用叶片泵的定子具有圆柱形内表面，定子和转子间有偏心距。若有Z个叶片，则定子圆周被分成Z部分。这里用r表示转子外圆半径，用R表示定子内表面半径。在垂直于转子轴的平面内，s1表示密封工作空间的最小值(即叶片滑出的距离最短)，它在半径方向的尺寸为[(R-e)-r]; S2表示密封工作空间的最大值(即叶片滑出的距离最长)，它在半径方向的尺寸为[(R+e)-r]。
利用等效法推导计算公式
从单作用叶片泵的工作过程可以看出，在离心力的作用下，叶片的顶端一直与定子内壁接触，由于定子内表面半径为R，则其周长为2πR，而叶片的行程为2e,故在转子转动一周的过程中，任意相邻的两个叶片所围成的工作腔，在半径方向上的变化幅度都等于2e.在计算单作用叶片泵的排量时，可将其工作过程等效视为:叶片的顶端先集中在长度为2πR 直线段上，然后同时沿着定子圆周的法线方向移动2e的距离。则密封容积几何尺寸的变化量可以等效长方体体积。