We all are know about centrifugal principle and some of their
applications.I always like centrifugal machines.
In this instructable I will show you,How to make a radial impeller centrifugal blower/fan just from recycled paper packaging box and normal paper.Hope it is very easy to make
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Step 1: MATERIALS NEEDED
1. RECYCLED PAPER PACKAGING BOX
2. NORMAL PAPER
3. HIGH SPEED DC MOTOR
4. POWER ADAPTER
5. DVD MOUNTER(OBTAINED FROM OLD DVD PLAYER)
7. BLADE OR PAPER KNIFE
9. HOT MELT GLUE GUN (OPTIONAL)
11. NEEDLE (FOR PUNCHING)
Step 2: DRAW THE LAYOUT IN PAPER
I uploaded drawing with detailed
dimensions.you can also make your own dimension
Draw all the layouts of parts in paper.
Step 3: CUT THE PIECES
CUT DOWN ALL THE PARTS.YOU WILL NEED ABOUT 8 PIECES OF VOLUTE PART BECAUSE WE ARE GOING GLUE 4 OF IT TOGETHER TO MAKE VOLUTE CASING
Step 4: ASSEMBLE THE IMPELLER
I used only recycled paper packaging box to make the impeller ,it is also made from paper.
In the layout diagram you will see the
impeller consists of two circles and 8 radial vanes.One circle has a small hole for fitting impeller with the DVD mounter and also with the motor. Another one circle has relatively large hole for inlet.
divide the circles into 8 equal sections( i.e. 45 degree) and also draw the section lines with pencil on it.
In the vanes a small chamfer about 2 mm is given
After that glue the vanes over any one of the circle's section line straightly.
After put glue on the section lines of another circle and put together the two pieces of the impeller.
If it wasn't fit correctly place a small weight over it. be careful to balance the weight otherwise the impeller will collapse.
Leave it to dry.
Step 5: FIT THE MOTOR MOUNTING
Fit the impeller and the DVD mounter together
it is used to fit the impeller to motor shaft.
Step 6: VOLUTE CASING
PUT 4 pieces of volute together and glue it you will get 2 rigid volute casing
Step 7: FIT THE SPACER
Take one part of the volute casing and make a
small hole in the center to enable the motor shaft to come.
Put the spacer between the volute casing and the impeller and put some strong glue to fit it rigidly.
Leave it to fit together.
Step 8: INLET HOLE IN VOLUTE CASING
There is another one
piece of volute,in this piece make a small hole to the same dimension as of the hole in the impeller inlet.minor changes can be acceptable.
Step 9: CUT ANOTHER ONE PIECE OF PAPER FOR CASING
Cut a thick piece of paper or glue together
two or three thin papers to the following dimension 3.5 cm x 33 cm.
you can cut it on your own dimension
Step 10: ASSEMBLE THE PARTS
Fit the impeller to the motor shaft. make sure
there is a small gap between the impeller and the casing .
glue the edges of the volute casing and fit the paper casing over it. after it partially fixed , glue the another one piece of the volute and fit the whole assembly together.
you will see a centrifugal blower.
NOTE: some times the impeller will separate from the the motor shaft due to centrifugal force.put some strong glue for rigidly fixing the both together.
I also published an instructable in the same name made of recycled paper box casing,impeller there is a video also see it for more understanding .the difference is i use normal paper for most of the pieces.