Andrew,
Sound like it may have been inspired by Tom's field burner?
High bun rates?
With this blower, the water plate that the motor mounts on has a hole
for the shaft so a little water contacts and cools the shaft directly.
Alex
On 05/08/2012 5:08 PM, [email protected] wrote:
On Sun, 05 Aug 2012 12:11:11 -0400, Alex English wrote:
I have built a barrel based platform to mount the burner
and a variable speed blower to dial up the draft. This allow the
platform to mimic common chimney conditions or indeed higher pressure
differences.
I had the problem of how to protect the induced draught fan in a
situation where there was no heat exchange, it was a tow along
under-a-cover-burner for vegetation. Danny built me a simple
centrifugal extractor just like yours and we isolated the shaft from
the fan by a tubular shaft. The bearings still overheated. The work
is on hold atm but the plan is to extend the paddles of the
centrifugal fan and twist them into an axial fan, pulling cool air
over the motor and blowing it down an outer tube concentric with the
flue pipe.
We need a good depression to prevent smoke from primary combustion
escaping the sides of the sledge, flue gases seem to be visually
clean, lost smoke from primary side equates to a loss of energy as
well as a pollutant.
AJH
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