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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Dry gas seal ： ウィキペディア英語版 Dry gas seal Dry gas seals are non-contacting, dry-running mechanical face seals that consist of a mating (rotating) ring and a primary (stationary) ring. When operating, lifting geometry in the rotating ring generates a fluid-dynamic force causing the stationary ring to separate and create a gap between the two rings. Dry gas seals are mechanical seals but use other chemicals and functions so that they do not contaminate a process. These seals are typically used in a harsh working environment such as oil exploration, extraction and refining, petrochemical industries, gas transmission and chemical processing. The dry gas seal has a lift geometry, which provides for lifting force and maintains separation of seal faces during operation. Machined-in lift profiles on one side of the seal face direct gas inward toward a extremely flat portion of the face. The gas that is flowing across the face generates a pressure that maintains a minute gap between the faces, optimizing fluid film stiffness and providing the highest possible degree of protection against face contact. The seal's film stiffness compensates for varying operations by adjusting gap and pressure to maintain stability. ==Design and use == Grooves or machined ramps on the seal direct gas inward toward the non-grooved portion. The action of the gas flowing across the seal generates pressure that keeps a minute gap, therefore optimizing fluid film stiffness and providing protection against face contact.〔http://www.manufacturingtalk.com/news/joc/joc106.html〕〔http://www.mt-online.com/component/content/article/83-august2007/490-building-relationships-with-world-class-suppliers.html?directory=90〕 The use of these seals in centrifugal compressors has increased significantly in the last two decades because they eliminate contamination and do not use lubricating oil. Non-contacting dry gas seals are often used on compressors for pipelines, off-shore applications, oil refineries, petrochemical and gas processing plants.〔http://www.manufacturingtalk.com/news/joc/joc106.html http://www.sealsentinel.com/35th-Story3.html〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dry gas seal」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.