威格士4535V-42A35/45A35/50A35/60A35-1AA-22R叶片泵,泵中两吸油区和两压油区各自对称,使作用在转子.上的径向液压力互相平衡,所以这种泵又被称为平衡式叶片泵或双作用卸荷式叶片泵。这种泵的排量不可调,因此它是定量泵。2.双作用叶片泵排量和流量图可知,泵轴转-转时,从吸油窗口流向压油窗口的液体体积为大半径为r,小半径为r,宽度为b的圆环的体积。因为是双作用泵,所以双作用叶片泵的排量为叶片体积对排量无影响。因为在压油腔,叶片缩回排出的液体体积补偿了叶片在压油腔所占的体积。叶片体积对排量无影响。因为在压油腔,叶片缩回排出的液体体积补偿了叶片在压油腔所占的体积。连成一体,形成了一个组合的密封工作腔。随着转子的匀速转动,位于大、小半径圆弧处的叶片均在圆弧上滑动,因此组合密封工作腔的容积变化率是均匀的。实际上,由于存在制造工艺误差,两圆弧有不圆度,也不可能完全同心;其次,叶片有一定的厚度,根部又连通压油腔,叶片底槽在吸油区时,消耗压力油,但在压油区时,压力油又被压出,同样会造成了流量脉动。由理论分析和实验表明,双作用叶片泵的脉动率在叶片数为4的整***且大于8时最小,故双作用叶片泵的叶片数通常取为12或16。
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