原裝正品力士樂葉片泵R900534508 PV7-1A/25-45RE01MC0-08

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產品簡介：

力士樂REXROTH可調節的先導式葉片泵

PV7...C/D/N/W

規格 14 … 150

組件系列 1X

大工作壓力 160 bar

大流量 270 l/min

可變排量

低工作噪音

流體動力潤滑的滑動軸承延長了軸承的使用壽命

壓力和流量的閉環控制可能性

低滯后

極低的開機控制時間和停機控制時間

符合 ISO 3019-2 的緊固件尺寸

符合 ISO 6162-1 和 ISO 228-1 的連接尺寸

適用于 HLP、HETG、HEES 和 HFD-U 液壓油

PV7 系列標準單泵可相互組合成組合泵，也可與內齒輪泵、外齒輪泵、軸向柱塞泵和徑向柱塞泵組合。

用于連續運行中對容積流量的要求可變、保壓功能百分比較高的驅動器，如：

機床

靜液壓軸承

恒壓系統

PV7... 型號葉片泵的可調節排量有助于實現低脈動流量并可在下行控制過程中達到非常高的重復精度和低壓力峰值，這些均得益

于其特殊設計。通過調整高度調節螺釘實現噪音優化，從而降低工作噪音。流體動力潤滑的滑動軸承確保長久使用壽命。排液器

的軸向補償可實現佳的容積效率。

功能，橫截面

型號 PV7 的液壓泵是具有可變排量的葉片泵。

基本上由殼體、轉子、葉片、定子環、壓力控制器和容量調節螺釘組成。

圓形定子環 由小型往復式控制活塞和大型往復式控制活塞支撐。環的第三個支撐點是高度調節螺釘。

驅動轉子在定子環 中旋轉。在離心力的作用下，轉子 中的導向葉片 貼緊定子環 的內滑動面。

吸油和排油過程

運輸液壓油的必要元件由葉片、轉子、定子環 和控制板組成。

為保護調試過程中的泵功能，定子環 由位于大驅動柱塞后的彈簧支持，保持其偏心位置（排液器位置）。

轉子 旋轉時元件容積增加，且元件通過吸油通道填充液壓油。達到大元件容積后，元件將與吸油側分離。如果轉子 進一步旋轉，

則會建立與壓力側的連接，元件將會減少液壓油并通過壓力通道將其壓入系統中。

調節

隨著壓力在系統中積聚，小型控制柱塞的后側始終通過通道向系統壓力加壓。

在排放位置，大型控制柱塞的后側也通過控制閥芯中的鉆孔向系統壓力加壓。具有較大面積的控制活塞將定子環 保持在其偏心

位置。

泵以低于壓力控制器上設定的零行程壓力的壓力排出液壓油。

控制閥芯由彈簧保持在某一位置。

下行控制

如果產生自產品壓力 x 面積的力 FP 超過了彈簧的反作用力 FF，調節器閥芯則會向彈簧偏移。因此，位于大驅動柱塞后的腔體

將與油箱連接，從而進行卸載。

連續受到系統壓力作用而被加壓的小驅動柱塞會將定子環 移至幾乎接近中心位置。泵保持壓力不變，流量降至零且泄漏被取代。

液壓油的功率損耗和熱量即可保持為小。

特性曲線 qV-p 保持垂直，且在設置不同壓力值時平行移動。

行程內控制

當系統中壓力降至所設零行程壓力以下時，彈簧會將控制閥芯推回其原位置。

再次對大控制活塞進行加壓，并將定子環 移至偏心位置。泵再次開始排油。

力士樂REXROTH可調葉片泵，先導操縱PV7...C/D/N/W

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