安沃馳aventics氣缸的壓力零件

活塞是氣缸中的受壓力零件。為防止活塞左右兩腔相互竄氣，設有活塞密封圈。活塞上的耐磨環可提高氣缸的導向性，減少活塞密封圈的磨耗，減少摩擦阻力。耐磨環長使用聚氨酯、聚四氟乙烯、夾布合成樹脂等材料。活塞的寬度由密封圈尺寸和必要的滑動部分長度來決定。滑動部分太短，易引起早期磨損和卡死。活塞的材質常用鋁合金和鑄鐵，小型缸的活塞有黃銅制成的。活塞桿是氣缸中重要的受力零件。通常使用高碳鋼、表面經鍍硬鉻處理、或使用不銹鋼、以防腐蝕，并提高密封圈的耐磨性。安沃馳aventics氣缸的壓力零件

回轉或往復運動處的部件密封稱為動密封，靜止件部分的密封稱為靜密封。
缸筒與端蓋的連接方法主要有以下幾種：
整體型、鉚接型、螺紋聯接型、法蘭型、拉桿型。
氣缸工作時要靠壓縮空氣中的油霧對活塞進行潤滑。也有小部分免潤滑氣缸。

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缸筒的內徑大小代表了氣缸輸出力的大小。活塞要在缸筒內做平穩的往復滑動，缸筒內表面的表面粗糙度應達到Ra0.8μm。
SMC、 CM2氣缸活塞上采用組合密封圈實現雙向密封，活塞與活塞桿用壓鉚鏈接，不用螺母。

端蓋上設有進排氣通口，有的還在端蓋內設有緩沖機構。桿側端蓋上設有密封圈和防塵圈，以防止從活塞桿處向外漏氣和防止外部灰塵混入缸內。桿側端蓋上設有導向套，以提高氣缸的導向精度，承受活塞桿上少量的橫向負載，減小活塞桿伸出時的下彎量，延長氣缸使用壽命。導向套通常使用燒結含油合金、前傾銅鑄件。端蓋過去常用可鍛鑄鐵，為減輕重量并防銹，常使用鋁合金壓鑄，微型缸有使用黃銅材料的。

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