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        • 當前位置:上海韋米機電設備有限公司 > 產品中心 > 博世REXROTH力士樂液壓元件 > 力士樂插裝閥控制蓋板LFA16GWA-71/A10P10

          力士樂插裝閥控制蓋板LFA16GWA-71/A10P10

          產品型號: R900912635
          品  牌: 力士樂
          • 1-9 件
            ¥4200.00
          • ≧10 件
            ¥4100.00
          所 在 地: 上海浦東新區
          更新日期: 2025-08-22
          詳細信息
           品牌:力士樂  型號:R900912635  加工定制:否  
           材質:鑄鐵  連接形式:法蘭  類型:直動式  
           適用介質:油品  壓力環境:常壓  工作溫度:常溫  
           流動方向:單向  介質溫度:37 ℃ 工作壓差:300  
           適用范圍:液壓系統  介質溫度:37 ℃ 工作壓差:300  
          力士樂插裝閥控制蓋板LFA16GWA-71/A10P10 R900912635,德國REXROTH插裝閥控制蓋板,購買進口液壓、氣動、自動化控制工業配件,認準“上海韋米機電設備有限公司”,7年老店,保證產品原廠原裝,價格優惠,售后無憂,歡迎新老客戶咨詢采購!
           

          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。

          液壓機是對金屬材料塑料、橡膠和粉末冶金制品進行壓力加工的設備,在工業部門得到了廣泛應用,如金屬材料的拉伸、沖裁彎曲翻邊冷擠壓以及成型加工等,還用于校正、壓裝、粉末冶金制品和磨料制品的壓制成型及塑料制品、絕緣材料的壓制成型等。為完成上述工作,液壓機應能產生較大的壓力,因此,液壓系統工作壓力、尺寸和流量也大,對其設計要求也高,是較典型的高壓大流量系統。①液壓系統壓力應能經常變換和調節,并能產生較大壓力,以滿足不同的工作要求。②空程速度大、加壓時推力大,系統功率大,要求功率利用率高。③空程與壓制時,其速度與壓力相差甚大,所以多采用高低壓泵組或恒功率變量泵供油系統.以滿足低壓快速行程和高壓慢速行程要求。
          力士樂插裝閥控制蓋板LFA16GWA-71/A10P10 R900912635
          力士樂REXROTH二通插裝閥、定向功能,控制蓋板LFA..GWA
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          力士樂REXROTH二通插裝閥、定向功能,控制蓋板LFA..GWB
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          液壓系統的振動與噪聲是一個相當普遍的問題。近年來,隨著液壓技術向高速、高壓和大功率方面的發展,液壓系統的振動和噪聲也日趨嚴重,并且成為妨礙液壓技術進--步發展的因素之-。
          振動是彈性物的固有特性,振動會產生噪聲,噪聲源于振動,因此振動和噪聲是液壓系統不可分割的兩種物理現象。
          研究和分析液壓系統振動與噪聲的成因,對降低或控制振動和噪聲,并改善液壓系統的性能有著極其深遠的意義。
          液壓系統的振動主要來自機械系統運動導致的振動、流體工作過程中產生的振動。

          簡單介紹液壓系統中的機械振動

          在液壓系統中主要體現在電動機、液壓泵、液壓馬達的轉軸在高速運轉時,會產生一種頻率與轉速相對應的受迫振動。這種振動會通過泵站基礎或管路傳遞到其他管道、油箱和閥件,電動機、液壓泵、液壓馬達在使用過程中,因磨損等原因使得配合間隙增大、軸承位置竄動等。因此將會產生高頻振動,電機與泵的聯軸器也會因兩半軸的不同軸、偏斜過大產生與轉速同頻率的振動。
          這些振動*常見的表現是液壓系統的噪聲加大,加快運動機件的疲勞破壞。當振幅超過一 定限度時,就會導致機械構件產生過大的應力而失效。

          液壓沖擊現象
          在液壓系統中,當液體流動方向突然改變或停止時,液體流動速度發生急劇變化。由于流動液體的慣性和運動部件的慣性,使系統中的壓力在某一-瞬間
          突然急劇上升,形成一個壓力峰值,這種現象稱為液壓沖擊。液壓沖擊形成的瞬時壓力峰值稱為沖擊壓力其值是正常工作壓力的3~4倍。它不僅會引起系統產生巨大的振動和噪聲,惡化工作條件,導致密封裝置、管路和液壓元件損壞,還會引起某些液壓元件產生誤動作,破壞系統的工作循環,降低設備的工作質量或造成設備的損壞。因此,研究液壓沖擊產生的原因及危害,采取減小和預防液壓沖擊的措施,對提高液壓系統的工作穩定性和工作性能有著重要的意義。

          液壓沖擊會使系統瞬時壓力比正常工作壓力高得很多,甚至超過正常工作壓力的2-3倍以上。突然關閉油缸的出油口時,用示波器實測得到的油缸出油口的壓力曲線。在液壓缸正常工作時,油液壓力約為4.5Mpa,突然關閉其出油口后,壓力瞬時增加到近12. OMpa,增大到原油壓的三倍。
          液壓沖擊的危害是很嚴重的,會產生巨大的振動和噪聲,且使油溫升高,還會使密封裝置、管件、連接件及其他元輔件損壞。例如,有一-直徑為25mm,壁厚為1.5mm的油管,當系統工作壓力只有7-10Mpa時,便發現有破壞現象,而這種油管的實際靜止破壞壓力約高達50- -60Mpa,從而可見,除壓力脈動使油管產生疲勞之外,主要原因是液壓沖擊所致的破壞結果。所以,搞清液壓沖擊的產生原因,估算出它的壓力值,并采取抑制和防治措施是非常重要的。

          液壓沖擊的危害主要有四個方面:
          1、系統中的部分元件如管道、儀表等因受到過高的液壓沖擊力而遭到破壞,一般來說液壓沖擊力可以達到普通工作壓力的3到4倍。
          2、系統的可靠性和穩定性會收到液壓沖擊的影響,如壓力繼電器會因液壓沖擊而發出錯誤信號,干擾液壓系統的正常工作。
          3、系統受到液壓沖擊時,發出較大的噪聲和振動,并可能令連接件松動、壓力閥調節壓力改變并出現泄漏。
          4、在液壓沖擊過程中,導管中形成的高頻率的重復載荷,容易使導管疲勞破壞。

          產生流體沖擊問題的主要原因
          1、液流通道迅速關閉或換向時的液壓沖擊。
          2、運動部件在高速運動中突然被制動。
          3、流體中空氣引起的液壓沖擊。

          1、液流通道迅速關閉時的液壓沖擊
          液壓沖擊多發生在油液突然停止運動的時候,例如迅速關閉閥門,油液的流動速度突然降為零,這時油液受到擠壓,使油液的動能轉換為壓力能,于是油液的壓力急劇升高,沖撞液壓系統產生液壓沖擊波,并迅速在管道內傳播。液壓沖擊波的傳遞、反射、油液方向的變化將反復進行,直到耗盡引起沖擊的能量,沖擊現象才會結束。因此,管路中的油液流速突然變化是產生沖擊的外界條件,而油液本身的慣性是產生沖擊現象的內在因素。
          液流通道迅速關閉時的液壓沖擊(水錘現象)
          液體自一具有固定液面的壓力容器沿長度為1,直徑為d的管道經出口處的閥門以速度v0流出。若將閥門突然關閉,此時緊靠閥門門口B處的一- 層液體停止流動,壓力升高△p。其后液體也依次停止流動,動能形成壓力波,并以速度c向A傳播。此后B處壓力降低△p,形成壓力降波,并向A傳播。而后當A處先恢復初始壓力后壓力波又傳向B。則如此循壞使液流振蕩。振蕩終因摩擦損失而停止。
          液流換向時產生的沖擊
          當換向閥移到中間位置時,壓力油突然與液壓缸切斷,但是由于運動部件的慣性作用,使液壓缸一端油腔中的液體受壓縮,壓力突然升高,而另一端油腔中的壓力下降,形成局部真空。因此,液流換向時產生液壓沖擊。
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