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Calculation of Torque

02/07/2008 4:59 AM

How to find out the torque to rotate a central driven clarifier mechanism having a weight of 1000 kg. This mechanism is under the water. Size of the tank is dia 20 meter x 4.5 m Standard Water Depth.
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PWSlack
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#1

Re: Calculation of Torque

02/07/2008 5:50 AM

How fast is is going? What is the cross-sectional area of the scrapers? How many blades are there?

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MUKULMAHANT
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#2

Re: Calculation of Torque

02/08/2008 3:41 AM

I just reengineered one with Diameter 30 m,Maxwater depth 6metre at speed 6 minutes/revolution. I usd a 5HP motor+planetary gear drive-all Indian--+Chain to wheels.

It is running quietly at 40% rated (inferred from Current and cosØ) torque.

The central Bearing-I changed over to Spherical Self-aligning roller SKF---22 size.

And retained the old forbished bronze plate dia 3' bearing as last standby with 8mm gap i.e. not normally rubbing.
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