thick straps (sincrone)

[dadobaio10]

good evening, given an existing machine I have to do the verification of the transmission shaft. As for the pulley and the toothed belt I already have the information of interasses, number of teeth, moment, etc. how do I calculate the strong shot and the weak shot? this procedure is immediate in trapezoidal straps knowing friction. in the case of the dense straps in which the transmission is not for friction as you do? Online calculation programs such as sitdrive only give information about static load to axis and strength of pretension.

 

[TETRASTORE]

It is a subject which has already been dealt with in this debate (pitches of dense belts for high powers).

 

[Stan9411]

good evening, given an existing machine I have to do the verification of the transmission shaft. As for the pulley and the toothed belt I already have the information of interasses, number of teeth, moment, etc. how do I calculate the strong shot and the weak shot? this procedure is immediate in trapezoidal straps knowing friction. in the case of the dense straps in which the transmission is not for friction as you do? Online calculation programs such as sitdrive only give information about static load to axis and strength of pretension.

first of all calculate the deltarian, that is the pair of your user divided the radius of the pulley.
then in the first approximation you can consider that half of the pitch goes to raise the lasco branch, the other half goes to tend the stretched branch.

= t0 + dt/2
tlasco = t0 - dt/2

of course you have to know about t0 that comes from the calculation of the belt you have made by means of some catalog. otherwise put it off.

for simple transmissions, with only drive and conduct, without galoppini and particular referrals these formulas are absolutely valid.

on more complicated layouts or with very strict utilities (many couple) tends to be less true because it comes into play the ribbing, the stiffness of the belt and various other parameters.

 

[meccanicamg]

with the gates calculation program get all the necessary data.

 

[Stan9411]

with the gates calculation program get all the necessary data.

but are you sure that calculates thesis and lasks during operation? Usually the belt calculation programs allow you to choose the belt from geometry and power of the user. End. do not give operating information.

 

[meccanicamg]

but are you sure that calculates thesis and lasks during operation? Usually the belt calculation programs allow you to choose the belt from geometry and power of the user. End. do not give operating information.

provides the shooting of each branch.
provides frequency and many other things.
I used it last Thursday.

 

[Archimed&]

Does anyone have a book or dispenses to advise on dentate theory? because in books it is usually treated only that flat or trapezoidal. .

 

[Marco F inox]

Today retailers no longer provide complete catalogs as once, they prefer to make two calculations of your project and then sell the necessary materials.
so on the internet, not all companies publish in a complete way, the design techniques for the use of their products.
As far as belts and pulleys are concerned, I have always used two catalogues published in 1979 and 2002 of the company "Poggi - Spa mechanical transmissions", where all the design calculations, examples, pulleys, belts and mounting systems are found.
on the tensioning system, especially when there is no spring tensioner, the arrow is calculated that the belt must be pressed with a certain half-range force, according to the parameters of the transmission.