Sealing rings
Introduction
O-Ring or O-Ring is a toroidal-shaped gasket, usually made of rubber, whose function is to ensure fluid tightness, for example in hydraulic cylinders and pneumatic cylinders, as well as in water diving equipment. It is usually found in equipment to prevent the exchange of liquids or gases at the joints between removable parts.
The first patent of this board is dated May 12, 1896 (129 years old) as a Swedish patent. J. O. Lundberg"), the inventor of the O-ring, received the patent.[1] The US patent[2] was made in 1937 by 72-year-old Danish machinist, Niels Christensen").[3].
The O-rings are placed in grooves designed for this purpose in the closure elements, commonly shafts "Shaft (mechanical)") and covers.
There are various O-rings for different applications, such as depending on the material from which they are made. In that case, the working pressure and temperature to which it will be subjected are mainly observed.[4][5][6].
NASA's Space Shuttle Challenger disintegrated 73 s after launch due to the use of an O-ring that stopped sealing the SRB due to the use of inconvenient fluoroelastomers (FKM) at extremely cold temperatures before takeoff, thus losing its elasticity, and therefore, its ability to recover its shape after the expected movement of the gasket after the exit of the exhaust gases and due to its overcompression in the assembly.
O-ring maintenance
O-rings need proper maintenance. Some recommendations for its use are the following:
Find more "Sealing rings" in the following countries:
References
- [1] ↑ «O-Ring - Who Invented the O-Ring?». Inventors.about.com. 15 de junio de 2010. Archivado desde el original el 15 de marzo de 2009. Consultado el 25 de marzo de 2011.: https://wayback.archive-it.org/all/20090315203834/http://inventors.about.com/od/ofamousinventions/a/O_Ring.htm
- [2] ↑ «Patente US 2180795 de Niels A. Christensen 2 de octubre 1937 y 21 de nov 1939». Archivado desde el original el 15 de marzo de 2009. Consultado el 19 de noviembre de 2015.: https://wayback.archive-it.org/all/20090315203834/http://inventors.about.com/od/ofamousinventions/a/O_Ring.htm
- [3] ↑ «No. 555: O-Ring». Uh.edu. 1 de agosto de 2004. Consultado el 25 de marzo de 2011.: http://www.uh.edu/engines/epi555.htm
- [4] ↑ «Copia archivada». Archivado desde el original el 21 de septiembre de 2007. Consultado el 5 de octubre de 2007.: https://web.archive.org/web/20070921162658/http://n-c.com/Page.asp?NavID=397
- [5] ↑ «MDC Vacuum Products-Vacuum Components, Chambers, Valves, Flanges & Fittings». Mdc-vacuum.com. Archivado desde el original el 12 de octubre de 2010. Consultado el 25 de marzo de 2011.: https://web.archive.org/web/20101012124816/http://www.mdc-vacuum.com/urd/uniface.urd/ecf0070w.display
- [6] ↑ «O-ring». Glossary.oilfield.slb.com. Archivado desde el original el 7 de junio de 2011. Consultado el 25 de marzo de 2011.