PVP16102L2P12派克油泵PVP泵PVP16102L2P12派克油泵PVP泵
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叶片泵的工作原理及结构一、双叶片泵的工作原理
1、定子(内腔型线):
1）两段长半径圆弧
2）两段短半径圆弧
3）四段过渡曲线
2、转子:
有若干叶槽，内有叶片。旋转时，叶片受离心力及液压力作用下，外顶定子内壁，并在槽内往复滑动。
3、配油盘:
在定子和转子两侧，盘上有两对吸、排口，在定子、转子、叶片和配油盘之间形成若干个工作空间。
叶片由短转向长半径时,叶片间v增大，p降低，经配油盘吸油。叶片由长向短半径时,叶片间v减小，经配油盘的排出口排油。当叶片位于密封区时,正好将吸、排口隔开，叶片间v不变，没有困油问题。转子转一周，每工作v都吸、排两次（双作用泵）。
二、单作用叶片泵的工作原理
定子内腔型线是圆，转子轴与定子偏心。逆时针回转时，工作v右半转增大，左半转v 减小。从两侧配油盘的吸、排口吸排油。
两相邻叶片转到吸、排油口间的密封区时，所接触定子曲线不是与转子同心的圆弧。密封区的圆心角略大于相邻叶片所占圆心角。
叶间工作v 先略有增大，然后略有缩小，会产生困油现象，但不太严重。通过在排出口边缘开三角形卸荷槽的方法即可解决。
定子、转子和轴承受径向力作用，属非卸荷式叶片泵。工作p不宜太高，q的均匀性也比双作用差。
移动定子可改变偏心的方向及大小，可做成n恒定而q可变的双向或单向的无级变量泵。其中用得较多的是限压式变量叶片泵。