力士乐油泵PV7-1A/16-30RE01MC0-08，力士乐REXROTH叶片泵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。​武汉百士自动化设备有限公司供应产品，原厂原装，质量保障，价格优惠；移动电话：15307180902，商务QQ：980227448，传真：027-87680708-608，联系人：雷青；欢迎新老客户咨询购买！型号 PV7 的液压泵是变量叶片泵。主要由泵体、转子、叶片、定子环、压力控制器和调节螺栓组成。圆形的定子环夹持在小调节活塞和大调节活塞之间。此环的第三个接触点是高度调节螺栓。被驱动的转子在定子环内转动。转子槽内的叶片由于离心力的作用压在定子环上。力士乐REXROTH叶片泵吸油和排油过程用来传递油液的腔由叶片、转子、定子环和配油盘形成。为了在投入使用时确保泵的运行功能，定子环由大调节活塞后面的弹簧压在其偏心位置 (排油位置)。当转子转动时，油腔的容积增大，并且通过吸油通道吸油。当油腔达到大容积时，它脱离吸油侧。转子继续转动，此腔和压油侧接通，并使其容积减小，通过压油通道压油到系统。类型 PV7...A 液压泵是直动式叶片泵，其排量体积可调。基本上由壳体，盖板，转子，叶片，定子环，压缩弹簧，调整螺钉和控制板组成。为限制大流量，该泵配有调节螺钉。驱动转子在定子环中旋转。转子中导入的叶片在离心力的作用下贴紧定子环的内跑合面。吸油和排油过程运输流体所需的腔室由叶片，转子，定子环，控制板和盖板组成。转子旋转时室体积增加，腔室通过吸油通道填充流体。达到大室体积后，腔室从吸油侧分离。随着转子继续旋转，高压流体侧的连接打开，腔室缩小并迫使流体通过压力油口进入系统。压力控制定子环由弹簧固定在其初始的偏心位置。系统中所需的大工作压力是在调节螺钉处通过弹簧设定。增大的压力是由于对抗弹簧力的工作阻力作用于定子环内跑合面的压力侧而产生的。达到相关压力（由设定的弹簧力决定）后，定子环朝零位置的方向移出其偏心位置。流量自我调节至当时所需的值。当达到弹簧处设置的大设定压力时，泵会将流量调回至几乎为零。工作压力得到保持，且仅更换泄露流体。流体的损失和加热从而降至低水平。力士乐油泵PV7-1A/16-30RE01MC0-08力士乐REXROTH叶片泵力士乐REXROTH可调叶片泵，先导操纵PV7...C/D/N/WR901320916 PV7-1X/10-14RE01MC0-08-A474R900580381 PV7-1X/10-14RE01MC0-16R987046360 PV7-1X/10-14RE01MC0-16LIM.15LT1450G.R987047421 PV7-1X/10-14RE01MC0-16LIM.16LT/MINR987065905 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PV7-11/06-14RA01MA0-04IN010R901410760 PV7-11/06-14RA01MA0-04-P30Q19R900919237 PV7-11/06-14RA01MA0-07R983035246 PV7-11/06-14RA01MA0-07IN010R901224086 PV7-11/06-14RA01MA0-07-P50R901239010 PV7-11/06-14RA01MA0-07-P65R901276189 PV7-11/06-14RA01MA0-07-P70R901390004 PV7-11/06-14RA01MA0-07-P70Q18R900979156 PV7-11/06-14RA01MA0-10-A410R901081778 PV7-11/06-14RA01MA0-10-A452R901235918 PV7-11/06-14RA01MA0-10-A473R901267598 PV7-11/06-14RA01MA0-10-A492R900951588 PV7-11/06-14RA01MA3-04R900952282 PV7-11/06-14RA01MA3-07R987065613 PV7-11/06-14RA01MAO-07LIMIT.A12CCR900950952 PV7-20/20-20RA01MA0-05R901464459 PV7-20/20-20RA01MA0-05-P25R901364572 PV7-20/20-20RA01MA0-05-P50R900950953 PV7-20/20-20RA01MA0-10R900618143 PV7-20/20-20RA01MA0-10-A416R901396092 PV7-20/20-20RA01MA0-10-C3.1R901276787 PV7-20/20-20RA01MA0-10-P100R901242257 PV7-20/20-20RA01MA0-10-P65R901253811 PV7-20/20-20RA01MA0-10-P85R900755261 PV7-20/20-20RA01MA3-05R900749846 PV7-20/20-20RA01MA3-10R900950954 PV7-20/20-25RA01MA0-05R983035244 PV7-20/20-25RA01MA0-05IN010R901441616 PV7-20/20-25RA01MA0-05-P24Q30R901410778 PV7-20/20-25RA01MA0-05-P30Q25R901428736 PV7-20/20-25RA01MA0-05-P30Q36R901412012 PV7-20/20-25RA01MA0-05-P45Q35R901410767 PV7-20/20-25RA01MA0-05-P45Q36R901416531 PV7-20/20-25RA01MA0-05-P50R900950955 PV7-20/20-25RA01MA0-10R983035245 PV7-20/20-25RA01MA0-10IN010R901410776 PV7-20/20-25RA01MA0-10-P63Q35R900741427 PV7-20/20-25RA01MA3-05R900704549 PV7-20/20-25RA01MA3-10液压传动系统的组成1、液压动力原件将动力装置的机械能转换成为液压能的装置，其作用是为液压传动系统提供压力油,是液压传动系统的动力源。例如液压泵。1.1液压泵液压泵是液压系统的动力元件，其作用是将原动机的机械能转换成液体的压力能,指液压系统中的油泵，它向整个液压系统提供动力。液压泵的结构形式一般有齿轮泵、叶片泵和柱塞泵。1.2齿轮泵齿轮泵即依靠密封在个壳体中的两个或两个以上齿轮,在相互啮合过程中所产生的工作空间容积变化来输送液体的泵。齿轮泵的概念是很简单的，即它的最基本形式就是两个尺寸相同的齿轮在一个紧密配合的壳体内相互啮合旋转，这个壳体的内部类似“8”字形，两个齿轮装在里面,齿轮的外径及两侧与壳体紧密配合。来自于挤出机的物料在吸入口进入两个齿轮中间，并充满这一空间，随着齿的旋转沿壳体运动，最后在两齿啮合时排出。困油现象齿轮泵要平稳工作，齿轮啮合的重合度必须大于1, 于是总有两对齿轮同时啮合, :并有一部分油液被围困在两对轮齿所围成的封闭容腔之间。这个封闭的容腔开始随着齿轮的转动逐渐减小，以后又逐渐加大。封闭腔容积的减小会使被困油液受挤压而产生很高的压力，并且从缝隙中挤出，导致油液发热，并致使机件受到额外的负载，而封闭腔容积的增大又造成局部真空，使油液中溶解的气体分离，产生气穴现象。这些都将产生强烈的振动和噪音，这就是齿轮泵的困意现象。危害：径向不平衡力很大时能使轴弯曲，齿顶与壳体接触，同时加速轴承的磨损，降低轴承的寿命。消除困油现象方法:通常是在两侧盖板上开卸荷槽，使封闭腔容积诚小时通过左边的卸荷槽与压油腔相通，容积增大时通过右边的卸荷槽与吸油腔相通。1.3叶片泵叶片泵即通过叶轮的旋转，将动力机的机械能转换为水能(势能、动能、压能)的水力机械。叶片泵转子旋转时，叶片在离心力和压力油的作用下，尖部紧贴在定子内表面上。这样两个叶片与转子和定子内表面所构成的工作容积，先由小到大吸油后再由大到小排油，叶片旋转一周时，完成两次吸油与排油。1.4柱塞泵柱塞泵即利用柱塞在泵缸体内往复运动，使柱塞与泵壁间形成容积改变，反复吸入和排;出液体并增高其压力的泵。柱塞泵是液压系统的一个重要装置。它依靠柱塞在缸体中往复运动，使密封工作容腔的容积发生变化来实现吸油、压油。柱塞泵具有额定压力高、结构紧凑、效率高和流量调节方便等优点，被广泛应用于高压、大流量和流量需要调节的场合，诸如液压机、工程机械和船舶中。2、液压执行元件将液压能转换为机械能的装置，其作用是在压力油的推动下输出力和速度或转矩和速度，以驱动工作装置做工。例如液压缸、液压马达。2.1液压马达液压马达习惯上是指输出旋转运动的，将液压泵提供的液压能转变为机械能的能量转换装置。液压马达亦称为油马达，主要应用于注塑机械、船舶、起扬机、工程机械、建筑机械、煤矿机械、矿山机械、冶金机械、船舶机械、石油化工、港口机械等。高速马达齿轮马达具有体积小、重量轻、结构简单、工艺性好、对油液的污染不敏感、耐冲击和惯性小等优点。缺点有扭矩脉动较大、效率较低、起动扭矩较小(仅为额定扭矩的60%-一70%)和低速稳定性差等。2.2液压缸液压缸是将液压能转变为机械能的、做直线往复运动(或摆动运动)的液压执行元件。它结构简单、工作可靠。用它来实现往复运动时，可免去减速装置，并且没有传动间隙，运动平稳，因此在各种机械的液压系统中得到广泛应用。液压缸输出力和活塞有效面积及其两边的压差成正比;液压缸基本上由缸筒和缸盖、活塞和活塞杆、密封装置、缓神装置与排气装置组成。缓神装置与排气装置视具体应用场合而定，其他装置则必不可少。3.3液压控制调节元件用来控制液压传动系统中油液的流动方向、压力和流量，以保证液压执行元件和工作装置完成指定工作。液压传动中用来控制液体压力、流量和方向的元件。其中控制压力的称为压力控制阀，控制流量的称为流量控制阀，控制通、断和流向的称为方向控制阀。3.4液压辅助元件保证液压传动系统正常工作。例如油箱、油管、滤油器。液压辅件是系统的一一个重要组成部分，其合理设计和选用在很大程度上影响液压系统的效率、噪声、温升、工作可靠性等技术性能。主要包括:3.4.1过滤器过滤器的作用:滤去油中杂质，维护油液清洁，防止油液污染，保证系统正常工作。3.4.2蓄能器蓄能器的作用:蓄能器是液压系统中储存和释放压力能的装置。1.作辅助动力源或紧急动力源在工作循环不同阶段需要的流量变化很大时，常采用蓄能器和一个流量较小的泵组成油源。另外当驱动泵的原动机发生故障时，蓄能器可作紧急动力源。2.保压和补充泄漏需要较长时间保压而泵卸载时，可利用蓄能器释放储存的压力油，补充系统泄漏，保持系统压力。3.吸收冲击和消除压力脉动在压力冲击处和泵的出口安装蓄能器可吸收压力冲击峰值和压力脉动，提高系统工作的平稳性。3.4.3油箱油箱是液压系统中储存液压油用。油箱的功用:储存系统所需的足够油液;;散发油液中的热量;逸出溶解在油液中的空气; :沉淀油液中的污物;对中小型液压系统，泵装置及一些液压元件还安装在油箱顶板上。3.4.4热交换器系统能量损失转换为热量以后，会使油液温度升高。若长时间油温过高,油液粘度下降，泄漏增加，密封老化，油液氧化，严重影响系统正常工作。为保证正常工作温度在20~65C，需要在系统中安装冷却器。相反，油温过低，油液粘度过大，设备启动困难，压力损失加大并引起过大的振动。此种情况下系统应安装加热器，将油液温度升高到适合的温度。3.4.5管件管件是用来连接液压元件、输送液压油液的连接件。它应保证有足够的强度,没有泄漏,密封性能好，压力损失小，拆装方便。3.4.6密封装置密封装置用来防止系统油液的内外泄漏，以及外界灰尘和异物的侵入，保证系统建立必要压力。3.5液压工作介质工作介质指传动液体，通常被称为液压油。3.5.1液压油液压油引就是利用液体压力能的液压系统使用的液压介质，在液压系统中起着能量传递、系统润滑、防腐、防锈、冷却等作用。对于液压油来说，首先应满足液压装置在工作温度下与启动温度下对液体粘度的要求，由于油的粘度变化直接与液压动作、传递效率和传递精度有关，还要求油的粘温性能和剪切安定性应满足不同用途所提出的各种需求。3.5.2液压油的要求质量要求:1.合适的粘 度和良好的粘温性能，以保证液压元件在工作压力和工作温度发生变化的条件下得到良好润滑、冷却和密封。2.良好的极压抗磨性， 以保证油泵、液压马达、控制阀和油缸中的摩擦副在高压、高速苛刻条件下得到正常的润滑，减少磨损。3.优良的抗氧化安定性、水解安定性和热稳定性，以抵抗空气、水分和高温、高压等因素的影响或作用，使其不易老化变质，延长使用寿命。4.良好的抗泡性 和空气释放值，以保证在运转中受到机械剧烈搅拌的条件下产生的泡沫能迅速消失:并能将混入油中的空气在较短时间内释放出来，以实现准确、灵敏、平稳地传递静压。5.良好的抗乳化性， 能与混入油中的水分迅速分离，以免形成乳化液，引起液压系统的金属材质锈蚀和降低使用性能。6.良好的防锈性，以防止金属表面锈蚀。