REXROTH叶片泵PV7-1A/10-20RE01MC0-10

REXROTH叶片泵PV7-1A/10-20RE01MC0-10 REXROTH叶片泵PV7-1A/10-20RE01MC0-10
单作用叶片泵的工作原理
单作用叶片泵构造 基本结构：定子、转子、叶片、配油盘（吸、排口）、壳体（吸、排接管）、前、后 盖板。 定子型线是圆，转子也是园，二者存在偏心距。 片间工作空间：叶片、定子内表面、转子外表面、配油盘或盖板围成。

单作用叶片泵的工作原理 泵由转子、定子、叶片、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，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 被压出而输出到系统中去。这种泵在转子转一转过程中，吸油压油各一次，故称单作用泵。转子受到径向液压不平衡作用力， 故又称非平衡式泵，其轴承负载较大。改变定子和转子间的偏心量，便可改变泵的排量，故这种泵 都是变量泵。

液压泵按照排量是否可调分为定量泵和变量泵；按照结构可分为柱塞泵、叶片泵和齿轮泵。
1、外啮合齿轮泵一般为定量泵
应用：一般用于低压（<2.5MPa）大流量的场合；
优点：结构简单，尺寸小，质量小，价格低廉，工作可靠，维护容易，对油污染不敏感；
缺点：磨损严重，泄露大，工作压力的提高受限；
2、叶片泵分为单作用叶片泵和双作用叶片泵，单作用叶片泵一般为变量泵，双作用叶片泵一般为定量泵。
应用：一般用于机床、自动化设备中的中低压液压系统中；
优点：工作压力较高，工作平稳，噪声小，寿命长；
缺点：结构复杂，对油污影响较为敏感；
3、柱塞泵分为径向柱塞泵和轴向柱塞泵，可用于变量；
应用：广泛应用于高压、大流量、大功率的系统中以及流量需要调节的场合，比如龙门刨床、拉床、工程机械、船舶；
优点：压力高，结构紧凑，，流量调节方便；
缺点：对油污影响很敏感；
液压泵的应用主要总结为：
（1）在机床液压系统中，一般选用双作用叶片泵和限压式变量泵；
（2）在筑路机械、港口机械及小型工程机械中，一般采用抗污染性能较强的齿轮泵；
（3）在负载大、功率大的场合，一般采用柱塞泵。

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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，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、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。

武汉百士自动化设备有限公司提供REXROTH叶片泵PV7-1A/10-20RE01MC0-10,包括REXROTH叶片泵,力士乐叶片泵,REXROTH油泵,REXROTH变量叶片泵的详细产品价格、产品图片等产品介绍信息。