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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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O ring groove design
I'm trying to improve the performance of the water pump in my steam
powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html |
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#2
Posted to rec.crafts.metalworking
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O ring groove design
"engineman" wrote in message ... I'm trying to improve the performance of the water pump in my steam powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html Been a while since I did much O ring work. But Parker did have the tables you need |
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#3
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O ring groove design
On Tue, 27 Jan 2009 21:12:27 -0800 (PST), engineman
wrote: I'm trying to improve the performance of the water pump in my steam powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html Check out http://o-ring.info/en/downloads/technical-manual/ |
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#4
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O ring groove design
engineman wrote:
I'm trying to improve the performance of the water pump in my steam powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html How about using a cup style seal? They are common in brake master cylinders. -- Steve W. |
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#5
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O ring groove design
On Tue, 27 Jan 2009 21:12:27 -0800 (PST), engineman
wrote: I'm trying to improve the performance of the water pump in my steam powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html The Parker o-ring handbook is available as a 9 MB download. http://www.parker.com/literature/ORD...g_Handbook.pdf There's a certain amount of compression necessary to get an effective seal with an o-ring. The necessary data is pretty well covered in the book, as well as gland dimensions for static and dynamic seals, chemical compatibility, etc. Pete Keillor |
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#6
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O ring groove design
Thanx, Don. Duly bookmarked for future reference.
Bob Swinney "Don Foreman" wrote in message ... On Tue, 27 Jan 2009 21:12:27 -0800 (PST), engineman wrote: I'm trying to improve the performance of the water pump in my steam powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html Check out http://o-ring.info/en/downloads/technical-manual/ |
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#7
Posted to rec.crafts.metalworking
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O ring groove design
engineman wrote: I'm trying to improve the performance of the water pump in my steam powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html Quad rings might be a better solution. They seal better and last longer in most applications. John |
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#8
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O ring groove design
john wrote: engineman wrote: I'm trying to improve the performance of the water pump in my steam powered cycle. It consists opf a 7/16" aluminum piston witrh 2 O rings at the end operating in a bronze cylinder. I'm using a clearence of .001" between the piston and cylinder. The dimension of the rings is 7/16 od X 5/16 id X 1/16 thick. I've been having leakage problems and have tried O ring grooves that had a square cross section a d half round. I'm looking for info on the best shape and tolerance for the grooves. I can't seem to find anything in Machinery's handbook. Engineman http://engineman69.home.comcast.net/...atewheels.html Quad rings might be a better solution. They seal better and last longer in most applications. John http://www.marcorubber.com/quad_rings.htm |
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