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(jù)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(jié)構(gòu)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(lǐng)域的使用種類比廣泛，已應(yīng)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(shè)計和機械實用性的延伸，充分展示了插裝閥對系統(tǒng)設(shè)計者和應(yīng)用者的重要性。由于其裝配過程的通用性、閥孔規(guī)格的通用性、互換性的特點，使用插裝閥完全可以實現(xiàn)完善的設(shè)計配置，也使插裝閥廣泛地應(yīng)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(tǒng)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(tǒng)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(tài) 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(fù)位彈簧力為Ft ， 當 pxAx + Ft >pAAA + pBAB 時 閥口關(guān)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(guān)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(lián)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(tài)數(shù)取決于先導換向閥的工作位置數(shù)。
四通閥由兩個三通閥并聯(lián)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(tài)數(shù)取決于先導換向閥的工作位置數(shù)。
基本結(jié)構(gòu)
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(tǒng)工作介質(zhì)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?？刂粕w板上,根據(jù)插裝閥的不同控制功能，安裝有相應(yīng)的先導控制級元件，以實現(xiàn)對液壓系統(tǒng)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(chǔ)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(gòu)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(tǒng)實例分析
二通插裝閥以其獨特的優(yōu)點以及經(jīng)濟和技術(shù)上的明顯優(yōu)勢被廣泛應(yīng)用到各個行業(yè)。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(yīng)考慮采用插裝閥。在一個液壓系統(tǒng)中,可根據(jù)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(fā)揮兩種液壓控制閥各自的優(yōu)點。
壓力機械屬于重型機械，主要應(yīng)用于冶金行業(yè).重型機械制造、化工等行業(yè)，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(shù)采用液壓傳動,由于液壓系統(tǒng)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(tǒng)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(tǒng)中，與普通液閥相比,它有以下優(yōu)點:
(1)結(jié)構(gòu)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(yīng)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(zhì):如液壓油、乳化液、水質(zhì);(7)便于實現(xiàn)集成化，能高度集成，適于與數(shù)字元件、比例元件及計算機組合使用，實現(xiàn)自動控制;(8)便于實現(xiàn)標準化、系統(tǒng)化、通用化。
由于二通插裝閥具有獨特的優(yōu)點，因此它被廣泛應(yīng)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(lǐng)域。
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