1

I can't figure out how to select variable speed belt for our variable speed drive design with the following specifications of our BAJA vehicle: 1.) BHP= 10HP 2.) Max. Belt velocity = 35 m/sec 3.) Max. Engine RPM = 3700

We are designing this variable speed drive for our CVT. Any help regarding the description of selection process will be greatly appreciated.

Thanks in advance!

  • Have you considered that the max belt velocity and the engine speed will limit the size of the gear you can use? – Solar Mike May 7 at 9:24
  • Yes, that was considered and we will design the sheave according to our belt – Vaibhav Dixit May 7 at 9:30
1

So, simple analysis is:

max belt speed <= engine speed * gear circumference

Throwing in the numbers and solving for the diameter at the maximum point:

Edit based on a unit error...

D = 35 / ((3700/60) * 3.14159)

which gives 0.18 metres ie 18cm.

That should enable you to work out what you want to use for a final drive ratio..

| improve this answer | |
  • I think you forgot to convert rpm from minutes to seconds to write D in mm – Vaibhav Dixit May 7 at 9:53
  • @VaibhavDixit converting minutes to seconds matches the units of rpm to velocity, it won't change the metres... – Solar Mike May 7 at 10:04
  • I wanted to say, you had to convert mins to seconds so that you can obtain units of D in SI units and I just found out your edited answer. I want to ask you how can I select the belt from the catalogue of belts of variable speed drive belts with these specifications – Vaibhav Dixit May 7 at 10:08
  • 1
    @VaibhavDixit about the only thing left for you to define is the length of the belt - distance between centres and pulley sizes should give you that or you can use a piece of string to measure it. also remember tensioning. And the width of the belt based on the power... – Solar Mike May 7 at 10:14
  • Thanks for the help Solar Mike, but I need the procedure which can help me select the variable speed belt specifications from the standard catalogue – Vaibhav Dixit May 7 at 18:02

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.