力士樂進口插裝閥R930058427 OD150518A000000    REXROTH力士樂液壓泵閥    力士樂液壓元件

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插裝閥基本組件
組件由閥芯、閥套、彈簧和密封圈組成。根據用途不同分為方向閥組件、壓力閥組件和流量閥組件。同一通徑的三種組件安裝尺寸相同，但閥芯的結構形式和閥套座直徑不同。三種組件均有兩個主油口A 和B、一個控制口x 。
插裝閥在流體控制功能的領域的使用種類比廣泛，已應用的元件有是電磁換向閥，單向閥，溢流閥，減壓閥，流量控制閥和順序閥。通用性在流體動力回路設計和機械實用性的延伸，充分展示了插裝閥對系統設計者和應用者的重要性。由于其裝配過程的通用性、閥孔規格的通用性、互換性的特點，使用插裝閥完全可以實現完善的設計配置，也使插裝閥廣泛地應用于各種液壓機械。
以輪式裝載機為例，采用插裝閥集成塊來代替故障不斷、難以診斷和維修的動力傳動控制裝置。原有控制系統有60多個連接管件和19個元件。用來替代的整體特制集成塊上只有11個管件和17個元件。體積為12 x 4 x 5立方英寸，是原系統所占空間的20%。采用插裝閥的特點如下：
減少安裝時間 減少泄漏點 減少易污染源 減少維修時間（因為插裝閥無需取下管接頭配件即可更換）
插裝閥單元的工作狀態 記油口A、B、x的壓力分別為pA、pB、px， 作用面積分別為AA、AB、Ax， 閥芯上端復位彈簧力為Ft ， 當 pxAx + Ft >pAAA + pBAB 時 閥口關閉 ； 當 pxAx + Ft ≤ pAAA+ pBAB 時 閥口開啟。
實際工作時，閥芯的受力狀況是通過油口x的通油方式控制的。
X通回油箱，閥口開啟；
x與進油口相通，閥口關閉。
改變油口通油方式的閥稱為先導閥。

三通閥 由兩個方向閥組件并聯而成，對外形成一個壓力油口、一個工作油口和一個回油口。三通插裝閥的工作狀態數取決于先導換向閥的工作位置數。
四通閥由兩個三通閥并聯而成
先導閥可以是一個三位四通換向閥
先導閥也可以是兩個二位四通換向閥或四個二位三通換向閥
四通插裝閥的工作狀態數取決于先導換向閥的工作位置數。

基本結構
二通插裝閥與普通液壓閥的功能相同，都是用來控制液壓系統工作介質的壓力、流量和流動方向的。二通插裝閥由插入元件、先導元件、控制蓋板和插裝塊體四部分組成。插入元件主要由閥芯、閥套、彈簧和密封件組成，圖1為其示意圖。控制蓋板上,根據插裝閥的不同控制功能，安裝有相應的先導控制級元件，以實現對液壓系統壓力、流量和方向的控制,插裝塊體則既是嵌入插入元件及安裝控制蓋板的基礎閥體，又是主油路和控制油路的通道體。
二通插裝閥通過不同的蓋板和各種先導閥(一般為滑閥)組合，即可構成方向控制閥、壓力控制閥和流量控制閥。
二通插裝閥液壓系統實例分析
二通插裝閥以其獨特的優點以及經濟和技術上的明顯優勢被廣泛應用到各個行業。在集成的液壓元件中，當通徑小于32mm時，可采用疊加
閥，當通徑大于中32mm時，應考慮采用插裝閥。在一個液壓系統中,可根據需要，液壓控制閥全部采用二通插裝閥;也可以部分液壓控制閥采用滑閥式，另一部分液壓控制閥采用二通插裝閥，充分發揮兩種液壓控制閥各自的優點。
壓力機械屬于重型機械，主要應用于冶金行業.重型機械制造、化工等行業，如沖壓機、鍛造機、剪切機、粉末制品壓力機、擠壓機等。壓力機械的動力及控制部分多數采用液壓傳動,由于液壓系統所需的壓力高、流量大，故適于用二通插裝閥來控制液壓系統的壓力、流量和流動方向。

二通插裝閥是一種新型的液壓控制元件，
它適用于高壓大流量的液壓系統中，與普通液閥相比,它有以下優點:
(1)結構簡單、緊湊、工藝性好，流動流阻小;(2)通流能力大,適用于大流量場合;(3)閥芯動作靈敏，響應快;(4)密封性能好,泄漏少;(5)工作可靠,抗污染能力強，壽命長;(6)適用于各種液壓介質:如液壓油、乳化液、水質;(7)便于實現集成化，能高度集成，適于與數字元件、比例元件及計算機組合使用，實現自動控制;(8)便于實現標準化、系統化、通用化。
由于二通插裝閥具有獨特的優點，因此它被廣泛應用于重型機械、鍛壓機械、塑料機械、冶金機械、船舶、工程機械、礦山機械等領域。

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