经营产品:
阀类:电磁阀、换向阀、单向阀、溢流阀、减压阀、平衡
阀、插装阀、比例阀等
泵类:齿轮泵、柱塞泵、叶片泵等
承诺:*保*原装正品,假一赔十 量大价格好商量!!
武穴黎翔机电设备有限公司REXROTH力士乐销售部
广泛应用于钢铁、冶金、铝行业、石油化工、航天、船舶制造、煤炭、水泥、电力、汽车、工程机械、食品、药业、林业、纺织、皮革、造纸等行业领域
叶片泵的管理要点除需防干转和过载、防吸入空气和吸入真空度过大外,还应注意:1.泵转向改变,则其吸排方向也改变叶片泵都有规定的转向,不允许反。因为转子叶槽有倾斜,叶片有倒角,叶片底部与排油腔通,配油盘上的节流槽和吸、排口是按既定转向设计。可逆转的叶片泵必须专门设计。
2.叶片泵装配 配油盘与定子用定位销正确定位,叶片、转子、配油盘都不得装反,定子内表面吸入区部分*易磨损,必要时可将其翻转安装,以使原吸入区变为排出区而继续使用。
3.拆装 注意工作表面清洁,工作时油液应很好过滤。
4. 叶片在叶槽中的间隙太大会使漏泄增加,太小则叶片不能自由伸缩,会导致工作失常。
5.叶片泵的轴向间隙 对ηv影响很大。
1)小型泵-0.015~0.03mm
2)中型泵-0.02~0.045mm
6.油液的温度和粘度 一般不宜超过55℃,粘度要求在17~37mm2/s之间。粘度太大则吸油困难;粘度太小则漏泄严重。
一、单作用叶片泵的工作原理
泵由转子1、定子2、叶片3、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,图右侧的叶片向外伸出,密封工作腔容积逐渐增大,产生真空,于是通过吸油口6和配油盘5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1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。
二、双作用叶片泵的工作原理
它的作用原理和单作用叶片泵相似,不同之处只在于定子表面是由两段长半径圆弧、两段短半径圆弧和四段过渡曲线八个部分组成,且定子和转子是同心的。在图示转子顺时针方向旋转的情况下,密封工作腔的容积在左上角和右下角处逐渐增大,为吸油区,在左下角和右上角处逐渐减小,为压油区;吸油区和压油区之间有一段封油区把它们隔开。这种泵的转子每转一转,每个密封工作腔完成吸油和压油动作各两次,所以称为双作用叶片泵。泵的两个吸油区和两个压油区是径向对称的,作用在转子上的液压力径向平衡,所以又称为平衡式叶片泵。
双作用叶片泵的瞬时流量是脉动的,当叶片数为4的倍数时脉动率小。为此,双作用叶片泵的叶片数一般都取12或16。
Rexroth力士乐PV7常用型号:
PV7-1X/10-14RE01MC0-16
PV7-1X/10-14RE01MD0-16
PV7-1X/10-20RE01MC0-10
PV7-1X/10-20RE01MD0-10
PV7-1X/16-20RE01MC0-16
PV7-1X/16-20RE01MD0-16
PV7-1X/16-30RE01MC0-08
PV7-1X/16-30RE01MD0-08
PV7-1X/25-30RE01MC0-16
PV7-1X/25-30RE01MD0-16
PV7-1X/25-45RE01MC0-08
PV7-1X/25-45RE01MD0-08
PV7-1X/40-45RE37MC0-16
PV7-1X/40-45RE37MD0-16
PV7-1X/40-71RE37MC0-08
PV7-1X/40-71RE37MD0-08
PV7-1X/63-71RE07MC0-16
PV7-1X/63-71RE07MD0-16
PV7-1X/63-94RE07MC0-08
PV7-1X/63-94RE07MD0-08
PV7-1X/100-118RE07MC0-16
PV7-1X/100-118RE07MD0-16
PV7-1X/100-150RE07MC0-08
PV7-1X/100-150RE07MD0-08
PV7-1X/06-10RA01MA0-05
PV7-1X/06-10RA01MA0-10
PV7-1X/06-14RA01MA0-04
PV7-1X/06-14RA01MA0-07
PV7-2X/20-20RA01MA0-05
PV7-2X/20-20RA01MA0-10
PV7-2X/20-25RA01MA0-05
PV7-2X/20-25RA01MA0-10
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