kafman
Mechanical
- Feb 16, 2025
- 7
My fan impeller is wornout like in the image, so how can i fix or repair with out impeller replacement by new one
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Fan blade worn out
- Thread starter kafman
- Start date
- Thread starter
- #3
Step 1: Determine WHY the blade (or judging by the images provided, the WELD) failed in the first place so you can fix the problem and not just apply a bandage to a symptom.
Step 2: Figure out where the missing material went. Are the piece(s) now causing trouble in the downstream direction by abrading or electrically shorting out something that requires the air as a coolant? Find the material and be sure it is removed.
Again, judging by the images - it appears that you have a curved blade welded to two end plates, one on either edge of the blade. To repair will - most likely - require removal of the impeller from the driving shaft. The blade-to-plate joint will require re-welding (from the looks of at least one image, where it connects to EACH end plate). Then the impeller will have to be remounted on the shaft and the impeller-and-shaft assembly rebalanced to within whatever the original tolerance was.
Step 2: Figure out where the missing material went. Are the piece(s) now causing trouble in the downstream direction by abrading or electrically shorting out something that requires the air as a coolant? Find the material and be sure it is removed.
Again, judging by the images - it appears that you have a curved blade welded to two end plates, one on either edge of the blade. To repair will - most likely - require removal of the impeller from the driving shaft. The blade-to-plate joint will require re-welding (from the looks of at least one image, where it connects to EACH end plate). Then the impeller will have to be remounted on the shaft and the impeller-and-shaft assembly rebalanced to within whatever the original tolerance was.
LittleInch
Petroleum
Nothing here makes sense to me.
Three identical pictures of what seems to be an impellor, but it has a solid inner core? EDIT - I now see once I click on the photo that we're actually looking at two blades of the impellor... difficult to see the trailing edge of the top one.
Also doesn't look circular but maybe that the optics.
hat has caused this t crack? If you don't solve the cause then you will be back at the same place pretty soon.
More pictures or a sectional drawing needed here.
EDIT: And what "EXACTLY" is the damage? just that little nick in the top blade or something else. Is that a weld gap or just some black gunge?
Three identical pictures of what seems to be an impellor, but it has a solid inner core? EDIT - I now see once I click on the photo that we're actually looking at two blades of the impellor... difficult to see the trailing edge of the top one.
Also doesn't look circular but maybe that the optics.
hat has caused this t crack? If you don't solve the cause then you will be back at the same place pretty soon.
More pictures or a sectional drawing needed here.
EDIT: And what "EXACTLY" is the damage? just that little nick in the top blade or something else. Is that a weld gap or just some black gunge?
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TugboatEng
Marine/Ocean
I think this is a fan from a wheelabrader.
As for a repair? The damage seems to be concentrated only in the weld. It could be rewelded, recoated, and rebalanced.
As for a repair? The damage seems to be concentrated only in the weld. It could be rewelded, recoated, and rebalanced.
If you click on one of the images there will be a zoomed out overlay image with selection arrows.
On the other hand, it doesn't help much.
It looks like there has been a great deal of erosion. Maybe this is moving sand contaminated air and that has eaten away the weld.
Which would appear to be the "repair"; to have someone put back the weld bead. It does need to be balanced after that.
- Thread starter
- #9
kafman
Mechanical
- Feb 16, 2025
- 7
first thanks for ur consideration, the fan was normal,but on going the fan's blades(just one side) got wornout due to the clinker abrasive material since it is fan for bag filter around clinker transportation,,the image shows only 2 blades out of 12,it is such oblique view, but all the blades have similar wornout surface
LittleInch
Petroleum
Given what looks like considerable thinning of the blades, I suspect you simply need a new one. Next time try coating it in rubber.
- Thread starter
- #12
kafman
Mechanical
- Feb 16, 2025
- 7
LittleInch
Petroleum
Maybe its irrelevant, but which way does this thing operate? Flow from the inside to out or outside to in. i.e. the direction of rotation as shown in the video or the other way around. Does this thing operate with the disc on the left actually horizontal?
The outer parts look to be very wavy and not really consistent.
But if you've got a small welder then why not just weld the gaps up and add some filler metal to give you a bit of time to procure a new one?
you could get some angle made, but it's not easy to bend it into shape.
The outer parts look to be very wavy and not really consistent.
But if you've got a small welder then why not just weld the gaps up and add some filler metal to give you a bit of time to procure a new one?
you could get some angle made, but it's not easy to bend it into shape.
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