[Stoves] Live-Wall Wood chip Bin

[Alex English]

Thanks Crispin,
Reply below.

On 02/11/2011 11:22 PM, Crispin Pemberton-Pigott wrote:
> Dear Alex
>
> What a lovely piece of work. The material looks as if there are a lot of
> fines.
Yes, to many in that scoop. The stuff in the loader is quite different. 
Neither represent our typical fuel.
>
> Have you tried a 'gripper' other than the weldmesh on the chip-side of the
> wall?
Not yet. One option is to make a wedge wall like the wedge floors that 
use brute force and move material toward the goal. With the wall it's 
not clear whether the wedges should bias pressure up or down. We know 
that gravity already moves material down towards the goal and that 
consolidation impedes flow. Brian Burt thinks the wall should loosen the 
chips, and argues that wedges pushing material up would work better.  
The current arrangement does a bit of both and works quite well. I 
originally thought of using the wire without the plywood so material 
would fall through as well as under. It was made to keep our options open.
>
> I was thinking that downward (45 deg) facing spikes (perhaps a long bolt
> with the head sticking out and two nuts on the other end) would bite a
> little harder and slip by if not needed. It was kinda hung up there at the
> end.
Sounds a bit fussy to set up.
>
> If you want to save money and power, do not use a right angle (worm) drive.
> They are not very efficient though common and popular. If you get a triple
> reduction in-line box you will be able to get the correct speed (now that
> you know what it is) without that first gear-up, thus eliminating one chain
> and sprocket set.
What is the efficiency loss?
>
> The worm drives run hot too.
>
> See http://industrial-gearbox.com/cone-drive.php and the third picture down
> on the right. You can eliminate the end bearing on the shaft and use the
> gearbox instead. To solve left-right lateral movement put a shoulder on the
> shaft and a thread on the end poking through. Note that it will be 'foot
> mounted' in your case.  For price and reliability I found Leroy-Somer to be
> good value but you have to go with what you can get serviced.
>
> If you really need a variable speed (because you want a sensor on the line
> to make it 'catch up' when it falls behind) don't get a variable speed
> drive. Put on a 3-phase motor and a controllable inverter (push button on
> the cover or a dial elsewhere). Wonderful things. High starting torque and
> you can make them run any speed you like because the controller generates
> 3-phase from a single phase input at any frequency you want. You can happily
> run a motor up to 6000 RPM so get a 4 pole one and a gearbox to suit your
> central speed at 60 Hz.
It is running on 3 phase from a variable frequency drive. Wonderful 
things indeed.
>
> It looks so good running in slo-mo like that.

That was fas-mo.

We should take this off list unless a commercial kitchen somewhere wants 
one.

Alex
>
> Well done.
> Crispin
>
> +++++++++++
>
> If your working on small-ish scale processes using wood chips and flow
> resistance feed stocks, then you might be interested in a 'minimum'
> tech, live-wall bin we made mostly out of our 'bone yard' of used parts.
> The idea is to scale it up, vertically, to a height the loader can still
> reach, with a capacity of around 1 ton of dry chips, while still being able
> move it with a skid cart or fork lift.  Currently
> (intended:) it uses one 1hp gear motor.
>
> http://www.youtube.com/watch?v=DJIZFY_N7U4
>
>
> Alex
>
>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://www.bioenergylists.org/
>
>