力士樂二通插裝閥閥芯位置監測控制蓋板LFA40EWA-7X/CA20DQMG24,德國REXROTH二通插裝閥閥芯位置監測控制蓋板,購買進口液壓、氣動、自動化控制工業配件,
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二通插裝閥是一種較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。
在冶金工業的使用的各種機械和設備進行冶煉、鑄錠、軋制、搬運和包裝中,又稱設備冶金。
冶金機械系統主要由動力系統、傳動系統、執行系統、操縱及控制系統組成。
1、動力系統:即機械系統的驅動裝置,是機器的動力源,如電機、液壓馬達等。作為冶金機械其動力源一般采用電動機。
2、執行系統:即機械的工作機構或執行機構,利用機械能來改變作業對象的性質、狀態、形狀與位置。如起重機的吊鉤、軋機的軋輥等。
3、傳動系統:在動力源與執行機構間傳遞運動與動力的中間環節,如減速機;其作用是改變運動形式(轉速)或力(力矩)的大小。
4、操縱與控制系統:使機器的各個系統能協調地進行,一般通過人工操作實現操作功能,如離合、制動、變速等。
礦山機械是直接用于礦物開采和富選等作業的機械。包括采礦機械和選礦機械。探礦機械的工作原理和結構與開采同類礦物所用的采礦機械大多相同或相似,廣義上說,探礦機械也屬于礦山機械。另外,礦山作業中還應用大量的起重機、輸送機、通風機和排水機械等。
破碎設備是將礦物進行破碎作業所用的機械設備。
破碎作業常按給料和排料粒度的大小分為粗碎、中碎和細碎。常用的砂石設備有顎式破碎機、反擊式破碎機,沖擊式破碎機,復合式破碎機,單段錘式破碎機,立式破碎機,旋回破碎機、圓錐式破碎機、輥式破碎機、雙輥式破碎機、二合一破碎機、一次成型破碎機等幾種。
根據破碎方式、機械的構造特征(動作原理)來劃分的,大體上分為六類。
(1)鄂式破碎機(老虎口)。破碎作用是靠可動鄂板周期性地壓向固定鄂板,將夾在其中的礦塊壓碎。
(2)圓錐破碎機。礦塊處于內外兩圓錐之間,外圓錐固定,內圓錐作偏心擺動,將夾在其中的礦塊壓碎或折斷。
(3)輥式破碎機。礦塊在兩個相向旋轉的圓輥夾縫中,主要受到連續的壓碎作用,但也帶有磨剝作用,齒形輥面還有劈碎作用。
(4)沖擊式破碎機。礦塊受到快速回轉的運動部件的沖擊作用而被擊碎。屬于這一類的又可分為:錘碎機;籠式破碎機;反擊式破碎機。
(5)磨礦機。礦石在旋轉的圓筒內受到磨礦介質(鋼球、鋼棒、礫石或礦塊)的沖擊與研磨作用而被粉碎。
(6)其他類型的破碎磨礦機。
采礦機械是直接開采有用礦物和采準工作所用的機械設備,包括:開采金屬礦石和非金屬礦石的采掘機械;開采煤炭用的采煤機械;開采石油用的石油鉆采機械。
采掘機械用于井下和露天礦山開采的采掘機械有:鉆炮孔用的鉆孔機械;挖裝礦巖用的挖掘機械和裝卸機械;鉆鑿天井、豎井和平巷用的掘進機械。
鉆孔機械分為鑿巖機和鉆機兩類,鉆機又有露天鉆機和井下鉆機之分。
掘進機械利用刀具的軸向壓力和回轉力對巖面的輾壓作用,直接破碎礦巖的成巷或成井機械設備。所用刀具有盤形滾刀、楔齒滾刀、球齒滾刀和銑削刀具。按掘進巷道的不同,分為天井鉆機、豎井鉆機和平巷掘進機。
綜合機械化采煤廣泛應用淺截深式雙(單)滾筒聯合采煤機(或刨煤機)、可彎曲刮板輸送機和液壓自移支架等設備,使回采工作面的破碎落煤、裝煤、運輸、支護等環節實現全面的綜合機械化。雙滾筒采煤機是落煤機械。電動機經截割部分減速機把動力傳遞給螺旋滾筒落煤,機器的移動靠電動機經牽引部分傳動裝置來實現。牽引方式基本上有兩種,即錨鏈牽引和無錨鏈牽引。錨鏈牽引借助牽引部分的鏈輪與固定在運輸機上的錨鏈嚙合而實現。
陸地石油鉆采機械。按開采工序分為鉆井機械、采油機械、修井機械和維持油井高產的壓裂、酸化機械。鉆井機械為開發石油或天然氣而鉆探或打生產井的全套機械設備。石油鉆井機,包括井架、絞車、動力機、泥漿循環系統、滑車裝置系統、轉盤、井口裝置和電氣控制系統。井架用于裝置天車、游動滑車和大鉤等,吊升其他重物上下鉆臺,懸掛井內鉆具進行鉆進。
選礦機械是在所采集的礦物原料中,根據各種礦物物理性質、物理化學性質和化學性質的差異選出有用礦物的過程。實施這種過程的稱為選礦機械。選礦機械按選礦流程分為破碎、粉磨、篩分、分選(選別)和脫水機械。破碎機械常用的有顎式破碎機、旋回破碎機、圓錐破碎機、輥式破碎機和反擊式破碎機等。
力士樂二通插裝閥閥芯位置監測控制蓋板LFA40EWA-7X/CA20DQMG24
力士樂REXROTH二通插裝閥閥芯位置監測控制蓋板LFA..EWA
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二通插裝閥是插裝閥基本組件( 閥芯、閥套、彈簧和密封圈)插到特別設計加工的閥體內,配以蓋板、先導閥組成的一種多功能的復合閥。因每個插裝閥基本組件有且只有兩個油口,故被稱為二通插裝閥,早期又稱為邏輯閥。
1、二通插裝閥的特點
二通插裝閥具有下列特點:流通能力大,壓力損失小,適用于大流量液壓系統;主閥芯行程短,動作靈敏,響應快,沖擊小;抗油污能力強,對油液過濾精度無嚴格要求;結構簡單,維修方便,故障少,壽命長;插件具有一閥多能的特性,便于組成各種液壓回路,工作穩定可靠,插件具有通用化、標準化、系列化程度很高的零件,可以組成集成化系統。
2、二通插裝閥的組成
二通插裝閥由插裝元件、控制蓋板、先導控制元件和插裝塊體四部分組成。圖1是二通插裝閥的典型結構
控制蓋板用以固定插裝件,安裝先導控制閥,內裝棱閥、溢流閥等。控制蓋板內有控制油通道,配有一個或多個阻尼螺塞。通常蓋板有五個控制油孔:X、Y、Z1、Z2和中心孔a。由于蓋板是按通用性來設計的,具體運用到某個控制油路上有的孔可能被堵住不用。為防止將蓋板裝錯,蓋板上的定位孔,起標定蓋板方位的作用。另外,拆卸蓋板之前就必須看清、記牢蓋板的安.裝方法。
先導控制元件稱作先導閥,是小通徑的電磁換向閥。塊體是嵌入插裝元件,安裝控制蓋板和其它控制閥、溝通主油路與控制油路的基礎閥體。插裝元件由閥芯、閥套、彈簧以及密封件組成(圖3 )。每只插件有兩個連接主油路的通口,閥芯的正面稱為A口;閥芯環側面的稱作B口。閥芯開啟,A口和B口溝通;閥芯閉合,A口和B口之間中斷。因而插裝閥的功能等同于2位2通閥。故稱二通插裝閥,簡稱插裝閥。
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。
插裝閥基本組件:1-閥套2-密封件3-閥芯4-彈簧5-蓋板6-阻尼孔7-閥芯。
插裝閥主要組合與功能
1、插裝方向控制閥
插裝閥可以組合成各式方向控制閥。
1)作單向閥
將x腔和A或B腔連通,即成為單向閥。連接方法不同,其導通方式也不同。若在控制蓋板上如圖5c連接一個二位三通液動換向閥,即可組成液控單向閥。
2)
作二位二通閥
二位三通閥,即可組成二位二通電液閥。
3)作二位三通閥
連接二位四通閥,即可組成二位三通電液換向閥。
4)作二位四通閥
連接二位四通閥,即可組成二位四通電液換向閥。
5)作三位四通閥0型換向閥
連接三位四通閥換向閥和單向閥,即可組成三位四通閥中位為0型電液換向閥。
6)作多機能四通閥
連接換向閥,利用對電磁換向閥的控制實現多機能功能。
2、插裝壓力控制閥
對插裝閥的x腔進行壓力控制,便可構成壓力控制閥。
1)作溢流閥或順序閥
在壓力型插裝閥芯的控制蓋板上連接先導調壓閥(溢流閥) ,當出油口接油箱,此閥起溢流閥作用;當出油口接另一工作油路,則為順序閥。
2)作卸荷閥
連接二位二通換向閥,當電磁鐵通電時,出口接油箱,則構成卸荷閥。
3)作減壓閥
采用插裝閥芯和溢流閥連接,則構成減壓閥。液壓油P從1流入P2流出,出口油液通過閥芯上的中心阻尼孔、蓋板和先導閥接通。當減壓閥出口的壓力較小,不足以頂開先導閥芯時,主閥芯上的阻尼孔只起通油作用,使主閥芯上、下兩腔的液壓力相等,而上腔又有一個小彈簧作用,必使主閥芯處在F端極限位置,減壓閥芯大開,不起減壓作用; 當壓力增大到先導閥的開啟壓力時,先導閥打開,泄漏油液單獨流回油箱,實行外泄。減壓閥在調定壓力下正常工作時,由于出口壓力與先導 閥溢流壓力和主閥芯彈簧力的平衡作用,維持節流降壓口為某定值。當出口壓力增大,由于阻尼孔液流阻力的作用產生壓力降,主閥芯所受的力不平衡,使閥芯上移,減小節流降壓口,使節流降壓作用增強;反之,出口的壓力減小時,閥芯下移,增大節流降壓口,使節流降壓作用減弱,控制出口的壓力維持在調定值。
3、插裝流量控制閥
插裝流量閥同樣有節流閥和調速閥等型式。
1)作節流閥
在方向控制插裝閥的蓋板上安裝閥芯行程調節器,調節閥芯和閥體間節流口的開度便可控制閥口的通流面積,起節流閥的作用,如圖12a。實際應用時,起節流閥作用的插裝閥芯一般采用滑閥結構,并在閥芯上開節流溝槽。
2)作調速閥
插裝式節流閥同樣具有隨負載變化流量不穩定的問題。如果采取措施保證節流閥的進、出口壓力差恒定,則可實現調速閥功能。如圖12b連接的減壓閥和節流閥就起到這樣的作用。
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