×
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

Centrifugal Blower-Direct Drive Base - rigid or spring mounted?

Centrifugal Blower-Direct Drive Base - rigid or spring mounted?

Centrifugal Blower-Direct Drive Base - rigid or spring mounted?

(OP)
We are in the process of replacing our belt drive with a direct drive on a 30000cfm centrifugal fan.  The existing fan/motor base is mounted on a number of springs (design would be circa 1970).

Is it still common practice to mount these type of systems on springs, vs rigidly mounting them to the base?  We have experienced signs that the base above the springs is not stiff enough and has been twisting - causing misalignement of the fan and motor.  The options I see are to either remove the springs and rigidly mount the base, or increase the stiffness of the existing base above the springs.

Thoughts?

RE: Centrifugal Blower-Direct Drive Base - rigid or spring mounted?

Google this and talk to these people:
Centrifugal Fan Isolation Base Assembly Instructions

RE: Centrifugal Blower-Direct Drive Base - rigid or spring mounted?

If you have building noise problems with this machine and it is mounted above the basement, fix the base and get new springs.

If you are in an industrial place and noise is not a problem, take out the springs and mount it rigid.

RE: Centrifugal Blower-Direct Drive Base - rigid or spring mounted?

adequate cluch should enable some alignement tolerance.

you need not only the springs, but also the structural noise isolation beneath the springs.

the biggest issue is weight balance of fan and motor base. if you are going to change the type of drive that could be critical issue.

i am curious how come that drive manufacturer has no any retrofit guidlines?!

sunshine

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