×
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

Electrostatic Discharge in Rotating Machinery

Electrostatic Discharge in Rotating Machinery

Electrostatic Discharge in Rotating Machinery

(OP)
I'm trying to look for an alternative to grounding brushes that ride on a shaft of a steam driven compressor to dissapate electrostatic charges that are generating nuissance noise signals and in some cases a transient large enough to fry the analog signal input to the monitoring system. Brush types systems are maintenance intensive and mounting this equipment on the compressor will not be easy.
The bearing lubrication is an oil mist system so conductive grease will not be an option.
Any ideas will be appreciated.    

RE: Electrostatic Discharge in Rotating Machinery

I have recently had a look at the AEGIS device. It is said to be an "Electron Transport Technology" shaft grounding and sealing device.

If what they say is true, then this could be the solution and end to all shaft voltage problems. I have tried to get some information from them, but haven't got it yet.

I will be back when I know more. Or you contact them. Tell me what you found!

RE: Electrostatic Discharge in Rotating Machinery

Try http://www.sohreturbo.com/table.htm for shaft grounding methods. I have not used them personally but it comes recommended in other engg. forums.

RE: Electrostatic Discharge in Rotating Machinery


 I think your best and secure option is brushes. Those Sohre by Edison look very good and ease to install.

I wonder if for your case, (electrostatic charge only) a steel ball inserted into the shaft center hole on one side and a grounded plate with another conical housing and spring loaded could solve your problem.

RE: Electrostatic Discharge in Rotating Machinery

You may be able to reduce future damage by surveying for remanent magnetic fields, e.g. those left by magnetic particle inspection, and degaussing as appropriate.

If you can access a shaft end, a carbon brush rubbing at 'zero' radius on a stainless spring, like in a car's distributor, should give reasonable service.

Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA

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