力士乐Rexroth进口柱塞泵A4VG125DA2D2/32L-NZF02F071SH

[构造作动说明]

     1、与驱动源连接的泵的输入轴旋转，与输入轴通过样条连接的汽缸块旋转。2此时，在斜板上滑动的活

塞根据斜板的角度进行往复运动。3. 从汽缸块活塞时从油箱吸入油,突入时向阀门门致动器侧吐出

油。根据阀板分为吸入端口和排出端口。可变泵斜板的倾斜角越大，活塞往复运动的冲程越大，角度为.

0时，活塞不进行往复运动，排出流量也为0。

    2、关闭回路泵的情况下，再加上逆方向的角度，即使输入轴的旋转相同，吸入和排出也会逆转。

基本特征

基本特基本特征

泵的主要特性如下:

    容积效率(实排出量理论排出量)低速旋转,高压使用时内部泄露增加效率降低。

    实轴动力(理论轴动力机械效率)回转数，压力增加机械效率增加。

    实排出量(容积效率)、实轴动力与旋转次数及压力等有关。

与泵转数成比例的流量控制图

(闭合)和(开启)

  闭合

1、由致动器(马达)和泵组成闭合的油压电路(闭合电路)。

        2、致动器的速度和方向通过使泵的斜板角度(请参照基本结构)

        3、在闭合回路中，能得到致动器的平滑的起动和停止是特征。

        4    泵和马达可以紧凑地配置成一个盒子的一-体型HST.

  开启

1、泵从油箱吸油,从致动器返回油也返回油箱的电路构成是开电路。

2、在固定泵的情况下，致动器的速度和方向由控制阀的切换闭池开度控制。另外，泵是可变的，泵也

可以调整流量,但是泵的斜板角度只向+a方向变化。

        3.开路中，可以用一-个泵连接并控制多个致动器。

[可变容积]当泵推容量(斜板角度)可变控制时，通过外部操作进行控制。(在闭合回路中，正反排出)●

指南通过杆链接控制斜板角度。<调节器>控制开路泵斜板角度的调节器有以下功能。马力控制为了不

超过发动机马力,根据控制排出压改变斜板角度(泵压容积),使泵入扭矩的大值恒定,泵的消耗马力恒

定。是为了避免泵的消耗马力超过发动机马力而发生熄火,有效利用的控制。(psvd)●负荷感测控制:是根

据操作量只使之吐出必要流量的控制。只让泵排出致动器所需的压力和流量。在上述的开路(开)的说明图

中，为了使控制阀的前后的压力差始终成为-定，通过改变泵的斜板角度(推开容积),控制只使之吐出与

控制阀的开度相应的流量。由此不会产生剩余流量,通过抑制发热等,可以实现节能的系统。

[串联泵(2连、3连)] 是用1个输入轴轴)转动2个或3个泵的结构。由于可以从1泵、2泵立供给

流量，例如通过供给行驶马达，就可以构成车辆的行驶系统。3泵也可以作为构成了闭合回路的情况下

的充电泵使用。(PSV2) [单流和分流流]就像活塞泵的基本结构-样,具有-个吸进端口和一个排出端

口的单流类型是正常泵。与此相对,分离流类型通过在-个汽缸块上交替配置端口,使相互立的两个

系统的排出成为可能。

博世力士乐rexroth定量柱塞泵A4VG

A4VSG型号 

规格40至1000

轴向柱塞斜盘结构

闭式回路

1和3系列

用于保护闭式回路的阀块

用于进油增压和先导的辅助泵或同规格的另一个轴向柱塞泵可组成联合泵

A4CSG型号 

规格250至750

轴向柱塞斜盘结构

闭式回路

3系列

完整的增压泵阀技术

连轴驱动泵甚至可和完整的辅助泵联合使用

博世力士乐rexroth定量柱塞泵A4VG  优势供应 欢迎新老顾客来电咨询

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柱塞式液压泵(简称柱寨泵)是靠柱塞在缸孔内的往复运动改变柱塞缸内的容积来实现吸液和压液的液压泵。与其他容积式泵相比，它具有以下优点:

    1)工作参数高。常用压力达20-40MP, 压泵可达70MPa以上:常用排量为每转几毫开到500mlL,大排量泵每转可达数千毫升；常用柱塞泵的驱动功率在200KW以下，大功率柱嘉泵可达500kw以上。

   2)。其容积效率可达95%以上，总效奉可达90%以上。

   3)变量方便，变量形式较多。利用变量柱塞泵可较易实现液压系统的功率调节和无级变速。

   4)使用寿命长。柱塞泵内轴承的设计寿命一般为 2000 ~ 5000h,柱塞泵的使用寿命可达10000h以上。

  5)可以使用不同的工作介质。

  6)单位功率的质量比较轻。

柱塞泵主要有以下缺点:

  1)结构较复杂，零件数量多。

  2)制造工艺要求高，价格较贵。

  3)除阀配流柱塞泵外，一般对液压介质的污染比较敏感，因此，对使用和维护的技术水平要求较高。

     按柱塞在缸孔中排列方式的不同，可将柱塞泵分为径向式和轴向式两大类。由于径向柱塞泵的结构比较复杂，径向尺寸大，自吸能力差，并且配流轴受液压不平衡力的影响，易于磨损，限制了其转速和工作压力的提高，因此在许多场合已逐渐被轴向柱塞泵所代替。但低速大转矩液压马达主要采取径向柱塞式

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