4WRZ32W6-520-7X/6EG24K4/D3V力士樂比例閥

4WRZ32W6-520-7X/6EG24K4/D3V

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(3)元件制造裝配精度超差：所有的液壓元件及密封部件都有嚴格的尺寸公差、形位公差等要求。如果在制造過程中超差，例如：油缸的活塞半徑、密封槽深度或寬度、裝密封圈的孔和尺寸超差或因加工問題而造成失圓、本身有毛刺或洼點、鍍層脫落等，密封件就會有變形、劃傷、壓死或壓不實等現(xiàn)象發(fā)生，使其失去密封功能，將使零件本身具有先天性的滲漏點，在裝配后或使用過程中發(fā)生滲漏。系統(tǒng)裝配粗糙，缺乏減振、隔振措施;系統(tǒng)超壓使用，未做到按規(guī)定對系統(tǒng)適時檢查及易損件壽命到期但未及時更換等都會造成系統(tǒng)泄漏。
(4)油液溫升過高：液壓系統(tǒng)工作時，要控制油液溫度，溫度過高，會產(chǎn)生以下現(xiàn)象：①多數(shù)情況下，當油溫經(jīng)常超過60℃時，油液黏度大大下降，不僅使?jié)櫥湍ぷ儽?，摩擦力加大，磨損加劇，而且密封圈膨脹、老化、失效，結果導致液壓系統(tǒng)產(chǎn)生泄漏。據(jù)研究表明，油溫每升高10℃則密封件的壽命就會減半。②油液溫度升高后，體積膨脹，壓力升高，而泄漏隨壓力的升高而加大，從而使泄漏增加。③油溫升高使間隙脹縮變化。一般配合零件材質不同，材料熱膨脹系數(shù)不同，當油溫升高時，配合零件因脹縮變化不同，會使配合間隙發(fā)生變化，當間隙變大時，造成泄漏增加。
(5)液壓系統(tǒng)壓力沖擊：液壓系統(tǒng)中由于頻繁換向，在較高壓力下突然啟動油泵或關閉閥門及缸體快速動作都會造成瞬時峰值壓力高達工作壓力的好幾倍，有時足以使密封裝置、管道或其它液壓元件損壞而造成泄露。
控制泄漏措施 力士樂比例閥 武漢 現(xiàn)貨
造成工程機械液壓系統(tǒng)的泄漏的因素是多方面綜合影響的結果，以現(xiàn)有的技術和材料，要想從根本上消除液壓系統(tǒng)的泄漏是很難做到的。只有從以上影響液壓系統(tǒng)泄漏因素出發(fā)，采取合理的措施盡量減少液壓系統(tǒng)泄漏。
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