Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® General Discussion > The Junque Drawer
Forgot Password? Join Us!

Notices

The Junque Drawer Excess tools, parts or books that might be rare and that someone else might need. This is NOT a buy and sell forum.

The Junque Drawer

Noisy air blowers


this thread has 19 replies and has been viewed 1356 times

Reply
 
Thread Tools Display Modes
  #1  
Old 01-31-2016, 07:38:04 PM
I like oldstuff I like oldstuff is offline
Subscriber
 
Join Date: Jan 2012
Location: Milwaukee, Wisconsin, USA
Posts: 4,988
Thanks: 1,088
Thanked 4,923 Times in 2,011 Posts
Default Noisy air blowers

Allright I put this in LeJunque drawer as it seems appropriate. Junk is what I'm dealing with here

I have a fairly large fireplace that has two blowers under the hearth. These push air upwards around the steel firebox and the heated air comes out louvers at the top for splendid heating action.

To make a short story long as I usually do, and where better than the stak to sak a question, after 40 years these 1/20th hp blower motors ala Grainger are worn out and noisy. Me being tricky and resourceful yet a cheap ass bought two new motors at $30 each instead of new blowers at $132 each.

Oh boy here's my new motors thankyouverymuch Mr. Mailman.
Oh oh,, China.
I hook one up and it vibrates like mad.
Grrrr. I take them apart and balance the armatures and now they're pretty smooth. The windings were also very loose so I varnished them to firm them up. Thanks Beijing.....

I put them back in the fireplace and they're noisier than the worn out ones.
Needless to say me not pleased.

Anyone have a suggestion for some sound deadening foam I can coat the blowers and housings with? The stuff used for cars is horribly overpriced.
Reply With Quote
Sponsored Links
  #2  
Old 01-31-2016, 07:45:49 PM
Glenn Ayers Glenn Ayers is online now
Subscriber
 
Join Date: Oct 2005
Location: Bethany, West Virginia, USA
Posts: 1,570
Thanks: 1,814
Thanked 1,883 Times in 764 Posts
Default Re: Noisy air blowers

Can you mount the motors in rubber grommets ?

Did some tin or something come loose & is now making noise from motor vibration ?
__________________
"I'll have the Red Pill, thank you."
Reply With Quote
  #3  
Old 01-31-2016, 07:46:55 PM
Amax Amax is offline
Subscriber
 
Join Date: Aug 2015
Location: Manchester, Vermont
Posts: 664
Thanks: 329
Thanked 363 Times in 228 Posts
Default Re: Noisy air blowers

Spray foam? Fiberglass wool?

Maybe don't mount the fans down tight - let them wiggle a bit - maybe orings under the mounts to sound isolate them.
Reply With Quote
  #4  
Old 01-31-2016, 08:55:30 PM
I like oldstuff I like oldstuff is offline
Subscriber
 
Join Date: Jan 2012
Location: Milwaukee, Wisconsin, USA
Posts: 4,988
Thanks: 1,088
Thanked 4,923 Times in 2,011 Posts
Default Re: Noisy air blowers

The blowers are rigidly mounted to a pre made framework which is attached to the masonry. So there is no practical way to float/isolate them. Besides. it's essentially a press fit in the enclosure and no room to float them. So at this point I'm looking to mitigate the noise.

There is a decent gap from the blower to the decorative grille. I'm thinking of putting a sheet of thin plywood in there to redirect the noise inwards yet not restrict airflow to the blower. Coat this with sound foam also. Temperature isn't an issue as they're at floor level pulling cold air in.

Crappy cell phone pic.
Attached Thumbnails
Click image for larger version

Name:	blower.jpg
Views:	91
Size:	77.5 KB
ID:	245240  
Reply With Quote
  #5  
Old 01-31-2016, 09:11:11 PM
I like oldstuff I like oldstuff is offline
Subscriber
 
Join Date: Jan 2012
Location: Milwaukee, Wisconsin, USA
Posts: 4,988
Thanks: 1,088
Thanked 4,923 Times in 2,011 Posts
Default Re: Noisy air blowers

What held the blowers in were four 1/4-20 bolts to the pre made support enclosure. These assemblies were put in, then the masonry was installed around them. Getting them out was a nightmare as I had to go at the inside bolts by feel. Then the blowers wouldn't come out as they're such a tight fit. I had to cut the bottom of the lip on the enclosure to get them out!

There is really no way to put the 1/4-20's back in on the discharge so I made an angle iron support to hold them. Quite rigid and a perfect air seal. But yes, very rigid...
Attached Thumbnails
Click image for larger version

Name:	IMG_0766.JPG
Views:	83
Size:	351.4 KB
ID:	245255   Click image for larger version

Name:	IMG_0767.JPG
Views:	76
Size:	350.8 KB
ID:	245256   Click image for larger version

Name:	IMG_0768.JPG
Views:	81
Size:	329.4 KB
ID:	245257  
Reply With Quote
  #6  
Old 01-31-2016, 10:20:32 PM
Amax Amax is offline
Subscriber
 
Join Date: Aug 2015
Location: Manchester, Vermont
Posts: 664
Thanks: 329
Thanked 363 Times in 228 Posts
Default Re: Noisy air blowers

Get a Variac and run them at 95% voltage. Air flow will be almost as much and you can find a sweet spot noise-wise. (Assuming they are brushed motors, not synchronous.)
Reply With Quote
  #7  
Old 01-31-2016, 10:45:25 PM
I like oldstuff I like oldstuff is offline
Subscriber
 
Join Date: Jan 2012
Location: Milwaukee, Wisconsin, USA
Posts: 4,988
Thanks: 1,088
Thanked 4,923 Times in 2,011 Posts
Default Re: Noisy air blowers

Shaded pole.
Attached Thumbnails
Click image for larger version

Name:	motor.jpg
Views:	53
Size:	151.8 KB
ID:	245271  
Reply With Quote
  #8  
Old 01-31-2016, 11:03:01 PM
Amax Amax is offline
Subscriber
 
Join Date: Aug 2015
Location: Manchester, Vermont
Posts: 664
Thanks: 329
Thanked 363 Times in 228 Posts
Default Re: Noisy air blowers

I'm out of ideas. Looks like everything is stacked against you and you have pretty much already thought of everything.
Reply With Quote
  #9  
Old 01-31-2016, 11:12:58 PM
I like oldstuff I like oldstuff is offline
Subscriber
 
Join Date: Jan 2012
Location: Milwaukee, Wisconsin, USA
Posts: 4,988
Thanks: 1,088
Thanked 4,923 Times in 2,011 Posts
Default Re: Noisy air blowers

Thinking the Home depot sticky back duct noise stuff.
Reply With Quote
  #10  
Old 01-31-2016, 11:23:03 PM
Greg Mosley Greg Mosley is offline
Registered-II
 
Join Date: Jan 2005
Location: Nebraska
Posts: 317
Thanks: 256
Thanked 278 Times in 137 Posts
Default Re: Noisy air blowers

Just a thought. When you had the squirrels out did you wash them. The sails in the fan have a tendency to fill with debris from years of use. Throw them in a tub of warm water with a bit of dish soap and let them soak. Then hose them off. Be very careful not to disturb the balance clips or remove or move them that are attached on the blades. If you do, Good Luck. If any bending of the fan occurred during removal they will Never run smooth again. This should help you immensely. Enuf Said
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
How noisy is an Onan 6.0 DJB tdarden Onan Generators 22 04-30-2014 07:34:15 PM
Anyone have any Vintage Lawnboy Mowers/Blowers that they would sell and ship? smokey honda Garden Tractors / Mowers / Scooters 12 11-26-2013 10:13:38 PM
Noisy! Rod Fielder Oil Field Engines 3 09-29-2011 02:59:45 AM
New Way Noisy Valve Tom Herd Antique Gas Engine Discussion 5 11-29-2009 08:41:54 PM
Noisy Gears Jim Tremble Antique Engine Archives 25 01-24-2003 10:49:46 PM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 08:16:52 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277