Motor Capacity for a Bucket Elevator

Is tph tons per hour? If so, what's the size of the bucket, and how much weight will it hold (e.g. what's the density of the material being moved)?

material it will carry is ....cement.

tph means tons per hour.

O. K., but you left out one of the things I asked about -- how large are the buckets, or how much weight will be in each bucket. While you're at it, how many buckets will be full on one side of the lift at once?

250 tph is about 70 kg/sec. The height is ~60 m.

The force needed is 700 N. Over 60 m results in 42000 Nm/s or 42 kW.

You need to add at least 25% for total losses, friction etc. that is about 72 hp.

A 75 hp motor might just do it. Depends on the machinery, 100 hp may be safer.

Sir,

I will be very gratefull to you will kindly show me the deatail calucation of force and kw.

Regards,

I thought I did.

250 tph = 70 kg/s. You have to push up 70 kg in 1 sec a distance of 56 m.

Work = F * dist. 70 kg * 9.81 = 681.25 N (250/3.6*9.81)

Work = 681.25 * 56 m = 38150 Nm = Ws

Power = Work / time. Power = 38150 Nm/s = 38.15 kW.

Add 25 % = 48 kW * 1.36 = 65 hp. Select 75 hp Motor.

What kind of conveyor is it? Depending on its construction an friction losses you need to determine its friction hp and add it to the 38.15 kW or 52 hp which is the theoretical power needed for the lift.

Are you a student or a practising engineer in India?

Dear sir,

thank you for your kind support.

In my plant the installed motor capacity is 55kw induction motor,belt bucket elevator with 247 buckets.

Regards,