【導(dǎo)讀】一個壓力容器密封件是用來密封兩個單獨的壓力容器。的接縫，以防止壓力容器接縫包括一個環(huán)形密封環(huán)之間的內(nèi)壁和內(nèi)表面的流體流動。度，在接頭這點上造成壓力。影響適當?shù)拿芊庠拿芊饷?。的墊片不適合高溫操作情況，因為它們通常限制在約為450°華氏度的溫度下。另一方面，由于溫度條件超過了這種柔韌墊片和常見金屬墊片承載能力。屬墊片卻需要非常好的表面接觸面，這是難以實現(xiàn)的，甚至更加難以維護和服務(wù)，更不論在生產(chǎn)這種鏡面表面會顯著增加成本。

　　

【正文】 18h的 外 端 18f之間。第一環(huán)形內(nèi)表面 18i更好形成相鄰的 外 端 18d和第二環(huán)形內(nèi)表面 18j形成在第一環(huán)形內(nèi)表面 18i和 外 端 18f之間。因此，本發(fā)明的環(huán)形密封環(huán) R本質(zhì)上是一個四邊形結(jié)構(gòu)， 外端 18d， 18f里 有兩個斜截頭的 末端 ，這種四邊形結(jié)構(gòu)大體上是一個平行四邊形。 環(huán) 18能 由任何適合的高強度材料，如不銹鋼，如任何適合的合金， 或類似的，是最好的。這取決于本發(fā)明壓力容器密封元件 S受到壓力容器 P的環(huán)境里的影響。這一設(shè)想選擇的材料必須耐 腐蝕，耐高溫，以及禁得 住隨著情況要求的高壓。然而，材料應(yīng)該在稍高的壓力下是能夠收縮的，卻沒有顯示任何金屬疲勞，開裂或類似的。如下文更詳細的討論。 壓力容器密封 S的環(huán)形密封環(huán) R是由這些形成的，其中當壓力容器 P在較低壓力條件下，第一環(huán)形外表面 18a與壓力容器接縫 J的內(nèi)壁 12e有 一個角度關(guān)系，以及環(huán)形密封環(huán) R的第二環(huán)形外表面 18b，當壓力容器 P在較低壓力條件下， 18b與壓力容器接縫 J的內(nèi)壁 10g有一個角度關(guān)系。這在環(huán)形密封環(huán) R和對應(yīng)的密封表面 10g兩者間的配對角度，使壓力容器接縫 J的內(nèi)壁 12e與環(huán)形密封環(huán) R最少的一部分開始先接觸，因此在高壓時，只需要一個較低的預(yù)緊力。 It is preferable that the ring 18 be formed of any suitable high strength material such as stainless steel, any suitable alloy, or the like, dependent upon the environment to which the pressure vessel seal S of the present invention is subjected to within the pressure vessel P. This contemplates selecting materials that must withstand corrosive effects, high temperatures, as well as high pressures as the situation demands. However, the material should be able to flex slightly under high pressures without demonstrating any metal fatigue, cracking or the like, as discussed more fully hereinbelow. The annular seal ring R of the pressure vessel seal S is formed such that the first outer annular surface 18a is at an angle with respect to the interior wall 12e of the pressure vessel joint J when the pressure vessel P is under minimal pressure conditions and that the second outer annular surface 18b of the annular seal ring R is at an angle with respect to the interior surface 10g of the pressure vessel joint J when the pressure vessel P is under minimal pressure conditions. This mating angle between the annular seal ring R and the corresponding sealing surfaces 10g, 12e of 南華大學(xué)機械工程學(xué)院 the pressure vessel joint J results in a minimum portion of the annular seal ring R contacting the pressure vessel joint J initially, hence requiring a lower preload while at high pressures. Thus, the annular seal ring R can flex and bend to lower bearing pressures adjacent the undercut areas 18g, 18h of the ring 18, as shown in FIG. 3. 因此，環(huán)形密封環(huán) R可以伸縮和彎曲 ，而降低相鄰側(cè)向區(qū)域 18g,18h的承載壓力，如圖 3所示。 Thus, the pressure vessel seal S of the present invention results in a selfenergized, that is pressure actuated, sealing system that requires little if any preload to affect a seal. The coating means C is such that it is selflubricating and may be applied generously to the surface of the annular seal ring R, allowing the toleration of large surface imperfections adjacent the pressure vessel joint J while being inexpensive to manufacture as well as being capable of being used multiple times, due to the variable contact surface pressure of the pressure vessel seal S as pressures within the pressure vessel P are varied. Further, the pressure vessel seal S is capable of maintaining a fluid tight relation with the pressure vessel P even though the pressure vessel P experiences straining or stretching adjacent the sealing areas of the pressure vessel seal S due to high temperatures and (or) pressures. 因此，本發(fā)明的壓力容器密封元件 S是一個自緊的，由壓力控制的密封系統(tǒng)，它不需要任何預(yù)加載來影響密封。 由于壓力容器密封 S接觸表面壓力的變化以及壓力容器 P內(nèi)壓力的變化， 涂料方法 C是 自潤滑和可以充分運用在環(huán)形密封環(huán) R的表面，允許容忍壓力容器接縫 J相鄰的較多表面缺陷，同時制造價格低廉和可以多次使用 。 此外 ， 在高溫和（或）高壓下，盡管壓力容器 P承受壓緊或拉伸相鄰的密封區(qū)域，壓 力容器密封 S也是能夠保持流體與壓力容器有密封關(guān)。 南華大學(xué)機械工程學(xué)院 南華大學(xué)機械工程學(xué)院