×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

sleeve bearing design

sleeve bearing design

sleeve bearing design

(OP)
I am interested in finding information on bearing designs. In particular I have found several cases where the oil wedge or side pocket in a sleeve bearing was inadequate and allowed the bearing to run hotter than normal. Making the wedge larger and deeper solved the problem. Are there any rules of thumb for oil wedge dimensions?

RE: sleeve bearing design

Are you talking about the oil distribution groove? (The one that runs axially along the upper edge of the lower-half of the bearing.)

RE: sleeve bearing design

Suggestions:
1. Visit
http://www.reliabilitydirect.com/appnotes/jb.html
etc. for more info
2. This Forum has some detailed postings pertaining to bearings. It is possible to search for them by a keyword under advanced search
3. This posting appears to be on the mechanical side. It may also appear under mechanical engineers in this Forum

RE: sleeve bearing design

There is some discussion of oil distribution grooves in the "Tribology Handbook" by MJ Neale 1973

Section A11 for cranshaft sleeve bearings, and section B7 for other sleeve bearings.  If you can get hold of that reference it may answer your questions.

The crank-case section states:
"Any hole, slot, or groove in the housing behind a bearing is dangerous because it promoates undesirable delection, fretting, and cracking."
I interpret this to mean you should be very careful if your groove goes beyond the babbit.

One thing I gather is that an axial groove should not extend the full length of the bearing (although it looks like it can come very close).

Partial circumferential grooves and axial grooves will both have an edge that lies in the axial direction. That edge should be smooth transition to avoid erosion of the surface downstream of the groove end.

There are 9 figures illustrating various aspects in the crankshaft sleeve bearing section and several more in the general sleeve bearing section.  Tough for me to convey the whole thing to you without the figures. Also copyright restrictions would prevent me from copying it directly.

Maybe a bearing or equipment manufacturer or large motor rewind shop can provide some more info.

RE: sleeve bearing design

(OP)
Yes I am talking about the axial wedge that is usually in the lower half of the bearing. Typically I have seen it 1" wide on a 4" journal or so and is not quite as long as the bearing. Several times I have cured hot (160F) running bearings by making this groove a little deeper and a little wider. What I am looking for is any published data, rules of thumb or calculations I could make that would confirm that the groove detail is adequate.

RE: sleeve bearing design

Suggestion to the previous posting. The above postings may need the addition of the tech support of your bearing manufacturer to be on the safe side.

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! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close