New second job (making soleniods)

Meaningful discussion outside of the potato gun realm. Projects, theories, current events. Non-productive discussion will be locked.
User avatar
jrrdw
Moderator
Moderator
United States of America
Posts: 6524
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Has thanked: 10 times
Been thanked: 3 times
Contact:

Donating Members

Sun May 19, 2013 5:56 am

Very cool!
CS wrote:dynamic seal operated by a solenoid is just metal on metal
What kind of force is used to help hold the seal or does the solenoid do all the work? Stepped seat? Dome/curved seat? Details my good man details....
Look if you must.
User avatar
CS
Moderator
Moderator
Posts: 1837
Joined: Fri Feb 18, 2005 5:32 pm
Location: Southern Utah

Donating Members

Mon May 20, 2013 6:38 pm

Just a hole in the center, then a tungsten carbide ball is pressed .0005" into the hole, and then surfaced cleaned. Then a silicon carbide ball is used for the actual seal.

The taper is to small to be seen. A microscope is used to check for small particles that which will mess up the seal when pressing. The balls are very smooth and no pitting when looked at under a microscope. It is seated just with gravity, when testing, but when in a finished valve a spring seats the ball.
Attachments
metalmetalseal.jpg
metalmetalseal.jpg (16.27 KiB) Viewed 384 times
User avatar
jrrdw
Moderator
Moderator
United States of America
Posts: 6524
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Has thanked: 10 times
Been thanked: 3 times
Contact:

Donating Members

Mon May 20, 2013 8:40 pm

I imagine the spring is stainless steel to slow oxidation where it rest against the ball.
Look if you must.
Post Reply