×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Bearing Drain Passage Sizing

Bearing Drain Passage Sizing

Bearing Drain Passage Sizing

(OP)
I'm responsible for designing piping supplying and returning lubricant to bearings enclosed in a turbine casing.  The sump pressure is a few inches of water vacuum.  Oil supply is pressurized at ~25 psig.  On one bearing we supply air to the bearing to seal it from outside hot air.  

Compared to our past work, I think the housing drain passage and the pipe connection I was given are too small.  

If the bearing drain passage is too small, what is the risk?  Do we blow oil mist out of the bearing, lose the capillary action of the oil flow, ???

RE: Bearing Drain Passage Sizing

You are the man!  Increase the
sizes if you have the room.
Err on the safe side.

RE: Bearing Drain Passage Sizing

Consider that most vent returns are several times the diameter of supply pipes. The return is handling both oil and seal pressurization air.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources