原装正品力士乐叶片泵R900534508 PV7-1A/25-45RE01MC0-08
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产品简介：
力士乐REXROTH可调节的先导式叶片泵
PV7...C/D/N/W
规格 14 … 150
组件系列 1X
大工作压力 160 bar
大流量 270 l/min
可变排量
低工作噪音
流体动力润滑的滑动轴承延长了轴承的使用寿命
压力和流量的闭环控制可能性
低滞后
极低的开机控制时间和停机控制时间
符合 ISO 3019-2 的紧固件尺寸
符合 ISO 6162-1 和 ISO 228-1 的连接尺寸
适用于 HLP、HETG、HEES 和 HFD-U 液压油
PV7 系列标准单泵可相互组合成组合泵，也可与内齿轮泵、外齿轮泵、轴向柱塞泵和径向柱塞泵组合。
用于连续运行中对容积流量的要求可变、保压功能百分比较高的驱动器，如：
机床
静液压轴承
恒压系统
PV7... 型号叶片泵的可调节排量有助于实现低脉动流量并可在下行控制过程中达到非常高的重复精度和低压力峰值，这些均得益
于其特殊设计。通过调整高度调节螺钉实现噪音优化，从而降低工作噪音。流体动力润滑的滑动轴承确保长久使用寿命。排液器
的轴向补偿可实现佳的容积效率。
功能，横截面
型号 PV7 的液压泵是具有可变排量的叶片泵。
基本上由壳体、转子、叶片、定子环、压力控制器和容量调节螺钉组成。
圆形定子环 由小型往复式控制活塞和大型往复式控制活塞支撑。环的第三个支撑点是高度调节螺钉。
驱动转子在定子环 中旋转。在离心力的作用下，转子 中的导向叶片 贴紧定子环 的内滑动面。
吸油和排油过程
运输液压油的必要元件由叶片、转子、定子环 和控制板组成。
为保护调试过程中的泵功能，定子环 由位于大驱动柱塞后的弹簧支持，保持其偏心位置（排液器位置）。
转子 旋转时元件容积增加，且元件通过吸油通道填充液压油。达到大元件容积后，元件将与吸油侧分离。如果转子 进一步旋转，
则会建立与压力侧的连接，元件将会减少液压油并通过压力通道将其压入系统中。
调节
随着压力在系统中积聚，小型控制柱塞的后侧始终通过通道向系统压力加压。
在排放位置，大型控制柱塞的后侧也通过控制阀芯中的钻孔向系统压力加压。具有较大面积的控制活塞将定子环 保持在其偏心
位置。
泵以低于压力控制器上设定的零行程压力的压力排出液压油。
控制阀芯由弹簧保持在某一位置。
下行控制
如果产生自产品压力 x 面积的力 FP 超过了弹簧的反作用力 FF，调节器阀芯则会向弹簧偏移。因此，位于大驱动柱塞后的腔体
将与油箱连接，从而进行卸载。
连续受到系统压力作用而被加压的小驱动柱塞会将定子环 移至几乎接近中心位置。泵保持压力不变，流量降至零且泄漏被取代。
液压油的功率损耗和热量即可保持为小。
特性曲线 qV-p 保持垂直，且在设置不同压力值时平行移动。
行程内控制
当系统中压力降至所设零行程压力以下时，弹簧会将控制阀芯推回其原位置。
再次对大控制活塞进行加压，并将定子环 移至偏心位置。泵再次开始排油。
力士乐REXROTH可调叶片泵，先导操纵PV7...C/D/N/W
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