size of a smaller motor

[mortari]

good day I found this interesting forum...
I need help to size a gear motor I have no experience and I have to do it.
I have a cylinder diameter 114mm long about 1200mm I have to make it turn at a minimum speed 5 m/min max speed 60 mt/m how do I calculate the kw of the motor the reduction ratio etc etc etc.
Thank you all in advance
mortars william

 

[Marco74]

Welcome.... Meanwhile I would start looking at the site of bonfiglioli www.[B]bonfiglioli[/B].it or red www.[B]redmotor manufacturers[/B].it o abb www.[B]abb[/B].


ciao.

 

[MBT]

good day I found this interesting forum...
I need help to size a gear motor I have no experience and I have to do it.
I have a cylinder diameter 114mm long about 1200mm I have to make it turn at a minimum speed 5 m/min max speed 60 mt/m how do I calculate the kw of the motor the reduction ratio etc etc etc.
Thank you all in advance
mortars william

Ah, well...
depends. .
You turn it around with an electric motor, I guess.
and already you fight with a problem, because from 5 to 60 meters per minute it means changing its speed 12 times !!!
then, suppose to "turn" the reducer for a speed of 32.5 m/min, so that at that speed the motor turns to 1400 g/min.
to go 5 meters per minute, you will have to turn the motor to 215 g/min.
to go to 60 meters per minute, you will have to turn the motor to 2585 g/min.
the inverter that will command that motor will have to be of good quality, and the motor will not have to be "made in china"....
If so, however, your 114 mm roller has a development of 357.96 mm or 0.35796 m. to have a peripheral speed of 32.5 m/min. must rotate at 89.4 rpm.
therefore the reduction ratio of the reducer must be about 1:15.7.

about the power... missing data to make calculations. What you have to transport us, the forces at stake, any inertia, loss of friction... .

 

[mortari]

I have to apply these cylinders on a yarn train.
I figured it out, but the engine kw? ?
Thank you.

 

[gerod]

When you make measurements it's not enough to say that I have to move a thing at tot meters per minute.
I need more parameters:
- masses in play, inertia
- friction
- accelerations
etc.
If I don't know the loads how to size you in the engine or a gearbox?
p = f x v, if I only have v p = oo (infinite solutions)

so, as has been said several times in this forum, read the rules put patterns and other info, otherwise generic questions will have generic answers.
Clear?

However to change the speed so much or you put a nice inverter (if possible) or a motion-changer, or a speed reducer with variable ratio.
Hi.

 

[MBT]

I have to apply these cylinders on a yarn train.
I figured it out, but the engine kw? ?
Thank you.

you can also apply it on the towing cylinders of the building rod diameter 22, the concept is identical.
missing data, in the sense that if you don't say what strength you have to win the reel, or if you prefer, how much force you have to give to move your load, you will never know what power your engine has to have.
I'll explain with the classic automotive example.
You have a car, and you want me to travel 200 km/h. you know the diameter of the wheels and that the motor rotates at maximum to 6000 rpm. By making calculations, you will be able to determine the exchange rate. but if you can't tell me what aerodynamic resistance and rolling has the vehicle, you can never determine the power that the engine has to deliver.

 

[cacciatorino]

I have to apply these cylinders on a yarn train.
I figured it out, but the engine kw? ?
Thank you.

Maybe you better rely on expert people because otherwise you risk having problems. Such design choices require a certain skill that seems to me to understand you do not have.

see if a product like this can do for you:
http://www.rulmeca.it/italiano/prodotti_catalogo_serie.asp?un=3&mf=12

 

[stefanobruno]

Maybe you better rely on expert people because otherwise you risk having problems.

I, even though I already know what I need, call always the commercial of the gear motor that I change and I give the technical card of the drive.
extra reason when the delta between max speed and min is so big.

Bye.

 

[gerod]

I, even though I already have an idea of what I need, always call the motor-driver's commercial and I give myself the drive technical sheet.
extra reason when the delta between max speed and min is so big.

In fact you also do cross-check!

 

[stevie]

I discourage the inverter because the speed range to cover is too wide. the only solution wishing to spend little is a variable gear motor.

 

[MBT]

I discourage the inverter because the speed range to cover is too wide. the only solution wishing to spend little is a variable gear motor.

in fact the range is very wide.
However, if you use brand inverters and vector engines, those designed specifically to be controlled by inverters, I think you can.

 

[MauroM]

in fact the range is very wide.
However, if you use brand inverters and vector engines, those designed specifically to be controlled by inverters, I think you can.

You can do it for me, but if the 5 m/min you need to keep them for a long time you will need a servoventilated engine.