Fan pully failure

Fan pully failure

PostBy: Short Bus On: Sat Apr 21, 2012 2:17 am

I have an Anchor stoker, three to make one, strangely when we made one we only had one fan pully combination and it was in bad shape.
We ordered one from Pease feed and Coal, today three years later it has failed, taking the motor shaft with it.
I have instlled the less then prime used fan on the last remaing original motor and will send the failed unit to a machinest friend of mine, hopfully he will be able to sleave it with steel and make a better than new unit.
I will be calling Pease feed and coal tomarrow and probalby order another fan pully combination but it would be the same alluminum unit that just failed, anyone recognize this and be able to recomend another supplier, I want to have a good spare.
1/2 inch hole for shaft.
Has a motor frame number B56Z the Z indicating a special shaft size of 1/2 inch, When I get a new motor I may be reaming the pullys to 5/8 inch the standard shaft size for this frame, new motor is being selcted now, the first old motor failed in the windings, all were stored outside, the second had the shaft buffed down by this pully failure and the third is working but I'm not interested in waiting for faiure.
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Last edited by Short Bus on Sat Apr 21, 2012 4:28 am, edited 1 time in total.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Fan pully failure

PostBy: Berlin On: Sat Apr 21, 2012 2:45 am

Getting a new replacement wheel isn't cheap. I have a few if you need one, I think I have the right one for you.

However, ;) The reason I have good spares is because I don't use that setup, every stoker I get I rip them out! They do exactly as you have experienced, the aluminum wallows out or goes out of balance (dirt on blades etc) and then, it takes out the motor. Even if the fan doesn't wallow out, I've seen bad motors caused by the stress the fan places on the shaft. I like to put in an independent blower with a steel shutter on the intake to regulate flow and keep the feed motor separate. I have been using "active air" brand blowers with pretty good results. this is what you need: http://www.ebay.com/itm/Active-Air-Blow ... 221wt_1078
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal

Re: Fan pully failure

PostBy: Short Bus On: Sat Apr 21, 2012 4:31 am

You may have the best solution Berlin.
Currently I'm looking at motors that have 1 7/8 long shafts instead of 1 1/2 long shaft like the one that had the recent fan faiure.
Also considering using a 5/8 inch shaft 1 7/8 long on a bigger motor.
But a separate blower has strong potential.
Thanks for that perspective, just one step back from the problem, in a warm house.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only


Re: Fan pully failure

PostBy: Short Bus On: Sat Apr 21, 2012 12:51 pm

I always like stock systems, but in this case I just ordered the fan, and will get a simple one groove pully since I don't change speed ever.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Fan pulley failure

PostBy: Short Bus On: Mon Apr 23, 2012 3:19 am

I ordered the blower as recomended.
Monday I will order a modern motor and pulley with a new belt, using the grove in the driven pully closest to the motor, to maintan the correct driven speed and keep the pulley close to the motor bearing.
It is all about shipping cost when you send to Alaska, thank the Post Office for flat rate boxes, it is somtimes a chalange to get suppliers to use them.
When it was important to run everything on one motor that fan was a good system, but it has caused me more down time than everything ealse combined in three years.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Fan pully failure

PostBy: Berlin On: Tue Apr 24, 2012 4:28 am

I think you made the right choice. Stock systems are great when they work well. Unfortunately, even in my relatively short time working on bit stokers I've seen failure after failure from this setup. I've got a number of stokers that initially had that setup, now they have separate feed/fan units including my own and they've been in faithful service for a number of years without a single problem.
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal

Re: Fan pully failure

PostBy: Short Bus On: Tue Oct 16, 2012 2:37 am

The less than prime stock fan pully failed, because a bolt worked lose and destroyed the fan.
This forced me to install the blower motor and single pully system I was planning. I'm having one problem, I'm back to my old issue of to much ash and very little clinckers. This was an issue back when learing how to run this stoker and I cured it by adjusting for more combustion air. Sad to say I didn't recognize the same burn condition as I had before and I adjusted to less air making the problem worse, now at full open on the blower and still want more air. Thinking seriously of taking and old fan pully combination to machine shop and having a steel hub installed and going back to slightly modified stock operation.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Fan pully failure

PostBy: Short Bus On: Mon Oct 22, 2012 11:56 pm

Vacumed out the air box under the twyers and this has changed everything again, blower working good and I recomend the change if you do it with time to make it a proper looking job.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Fan pully failure

PostBy: rockwood On: Tue Oct 23, 2012 12:46 am

Could you post a photo of your handiwork?
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)

Re: Fan pully failure

PostBy: Short Bus On: Tue Oct 23, 2012 2:30 am

This was quick and in the cold, about 20 degrees that day.
I used Duct tape to seal the gaps, not proud of this work, should go to a shop and have a tapered tube made to improve air flow.
It is hard to fit that blower and motor inside the tin ware on this stoker.
I drilled two holes and mounted the blower and installed the single pully on the motor.
I did some calculations and used the largest and closest groove next to the gear box, but maintained the same driven shaft speed, I was very glad when the belt length calcualtion proved correct in this urgent situation, I anticipated failure because I installed a sub par blower wheel.
Just a warning currently available pulleys tend to be universal i.e. this belt is a 3L cross section but the pulley is for A, AX, and 3L to mention a few, this makes the pitch diameter different than just the outside diameter, additionally the universal pulley has higher flanges, so even with the correct belt length when tight, it may not allow removal of belt when belt is in it's loosest position, in other words machine off the extra on the pulley flanges, these belts all have the same "V" angle just different widths, so they ride at different hights in the groove. Pitch diameter is close to but not the same as outside diameter on a pulley, and can be used interchangably, but on these "universal pulleys" care should be taken.
Again at first it was not working correctly untill I cleaned out the air box under the twyers, now the preformance is good.
10 below last night, and I'm working on getting another blower wheel in reserve.
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Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Fan pully failure

PostBy: rockwood On: Tue Oct 23, 2012 3:48 pm

Short Bus wrote:10 below last night, and I'm working on getting another blower wheel in reserve.

Good thing it went out when it was warmer...fixing that at -10 would have really sucked.
You getting the old one fixed?
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)

Re: Fan pully failure

PostBy: Short Bus On: Tue Oct 23, 2012 11:03 pm

Old Blower wheel getting sleaved by a friend in Washington State.
Additional wheel on order and going to Washington for repair.
And I'm getting real impressed by how well the separate blower is working now.
Probably going to use one of the blower wheels on second stoker, they make a better looking presentation.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only