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Noisy Comgustion Fan

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by Brokenwing, Mar 22, 2013.

  1. Brokenwing

    Brokenwing Feeling the Heat

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    I am curious, ever since I did the 1 ton cleaning my convention blower is louder. I am wondering If I got the fan blade out of balance. It is not terrible just something I noticed. I was not rough with it, just took a paint brush, and brushed off the fins, and under the fan the best I could. I took the blower out and spun the wheel, but It seemed ok. If the blower is not out of balance I wonder if I could of got dirt down inside the motor. It has been running ok for the past 3 weeks, but I think something is out of order!

    Mods please fix the title, I am not sure How I messed up the spelling that bad lol! Thanks!

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  2. heat seeker

    heat seeker Minister of Fire

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    You might want to actually blow the motor itself out with compressed air. Dust collects in the windings and will cause the motor to eventually overheat.

    Is the noise more like a vibration, or a mechanical noise?
  3. Defiant

    Defiant Vermont Castings Geek

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    Thats one way to get attention;) I am not familiar with your stove, help will be on the way soon.
  4. Brokenwing

    Brokenwing Feeling the Heat

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    It reminds me off a bad set of brushes, but It is not loud, but I have noticed it if I get back there and wipe the dust off the hearth pad!
  5. woodsman23

    woodsman23 Minister of Fire

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    oil it as close to the bearings as possible
  6. Harvey Schneider

    Harvey Schneider Minister of Fire

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    You may have knocked of most of the dust and left an imbalance. On blowers both the wheel and motor armature are subject to vibration if the balance is disturbed. At 3000 rpm it doesn't take much dust to make the motor want to move around and it doesn't take much movement to make noise.
    Try compressed air, letting the air jet spin the wheel and rotor. Pay attention to the back of the plate that couples the wheel to the motor shaft. If the motor is a partially enclosed design, you may have some difficulty making sure that dust isn't clinging to it.
  7. Brokenwing

    Brokenwing Feeling the Heat

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    I will take it apart this weekend, since I am due for another cleaning. The wheel has one bolt holding it on to the motor shaft, I was thinking about unbolting the wheel from the motor, so I could clean it up real good, and get behind it and put it back together, how does that sound? I will also take some compressed air and try to blow out the motor. Thanks for the advice. I just do not want the motor to crap out on me after only a year in service.
  8. Harvey Schneider

    Harvey Schneider Minister of Fire

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    I wasn't able to get the fan off the shaft on mine. I got too close to damaging the fan and gave up. A stiff piece of cardboard and some paper towel did a good job of scraping the last of the soot off the back of the fan hub. Compressed air helped too.
    If when all is said and done, the motor still vibrates, try pressing gently against the housing to see if that quiets things down. A piece of tubing wedged between the motor housing and the frame might be all the dampening that is needed to quiet the vibration.
  9. heat seeker

    heat seeker Minister of Fire

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    My stove has some aftermarket fan in it that was in it when I got it. It vibrated a whole lot, and the metal cover of the motor rattled enough to drive you out of the room. I balanced the fan with a Dremel tool, and literally dented the metal cover so it's tight on the end frame of the motor. Much much less noise now.

    The thread: http://www.hearth.com/talk/threads/balanced-fan-quieter-stove.82005/#post-1049682

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