How to find shaft torque for belt pulley arragement?

  • #1
I am facing problem in calculating the shaft torque for my system.

Motor is driving pulley and that pulley is coupled with belt with another big pulley (plz refer attached file image).
Motor power 19.4 kw, Torque- 71.8 Nm, Motor Rated speed- 2580 rpm, motor shaft dia=42mm
Pulley dia (refer attached fig):-
d1=124.78, d2=374.33, d3=124.78, d4=356.51, output shaft speed =291 rpm. (shaft dia is 80 mm)

How to find the torque of shaft? plz tell me the methodology/procedure ...?
 

Attachments

Answers and Replies

  • #2
18,264
7,947
Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 
  • #3
569
85
Torque simply multiplies by the ratio of the pulley diameters. The first pulley set diameter ratio is 3:1 so torque multiplies by 3. The second pulley set diameter ratio is 2.86:1 so torque multiplies by 2.86. Overall, torque multiplies by 3 X 2.86 = 8.6. (Note that this ratio is about 3% less than the ratio of overall speed reduction. This is because the effective diameter of a v-belt pulley is slightly less than the outside diameter; in your case, about 4 mm less.)
 

Related Threads on How to find shaft torque for belt pulley arragement?

  • Last Post
Replies
16
Views
27K
  • Last Post
Replies
6
Views
8K
  • Last Post
Replies
10
Views
33K
  • Last Post
Replies
3
Views
38K
  • Last Post
Replies
8
Views
6K
Replies
3
Views
2K
Replies
8
Views
9K
  • Last Post
Replies
6
Views
4K
Replies
5
Views
9K
Top