0513300405 0513R15A7VPV16SM21HZ BOSCH叶片泵

叶片泵

双作泵工作原理:它由定子、转子、叶片和配油盘等组成。定子内壁近似椭圆形。叶片安装在转子径向槽内并可沿槽滑动,转子与定子同心安装。当转子转动时,叶片在离心力的作用下压向定子内表面，并随定子内表面曲线的变化而被迫在转子槽内往复滑动，相邻两叶片间的密封工作腔就发生加大和缩小的变化。叶片由小半径圆弧向大半径圆弧处滑移时,密封工作腔随之逐渐加大形成局部真空，于是油箱中油液通过配油盘上吸油腔吸入;反之将油压出。转子每转一-周 ，叶片在槽内往复滑移2次,完成2次吸油和2次压油,并且油压所产生的径向力是平衡的,故称双作用式,也称平衡式。

性能特点

叶片泵压力脉动小，因磨损而产生的工作压力下降车小运转平稳、噪音较小，结构紧凑，起动转矩小。但吸人条件较差，运动部件的工作可靠性较低。

1.流量较均匀，运转平稳，噪声较低。

2.双作用叶片泵转子所受径向力是平衡的，轴承寿命长;它的内部密封性也较好，容积效率较高;因此，一般额定排出压力较高，可达7MPa左右。

3.结构紧凑，尺寸较小而流量较大。

4.对工作条件要求较严。叶片抗冲击较差，较容易卡住，对油液的清洁程度和粘度都比较敏感。端面间隙或叶槽间隙不合适都会影响正常工作。转速一-般在500~2000r /道范围内，太低则叶片可能因离心力不够而不能压紧在定了表面，而太高则吸人时会产生“气穴现象”；

5.结构较复杂，零件制造精度要求较高。

力士乐REXROTH叶片泵

力士乐REXROTH可调叶片泵，先导操纵PV7...C/D/N/W

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