chain transmission dimensioning

[Echindo]

Good morning.
I'm working on a wagon that will have to transport 150 tons on rail. the carriage will flow on a100 burback rails with external diameter wheels of 500 mm.
to ensure the possibility of driving the cart in case of failures, I chose to use an epicycloidal reducer and I wanted to use a chain to transmit the torque to the wheels.
the carriage will have 4 wheels, all drive, with two gear motors that will transmit the torque. considering a maximum slope of 3% and a speed of 1.5 km/h I have a torque to the single wheel of 3410 nm.
you could please explain to me the size of the chain transmission, in which diameter, tooth number and everything is chosen.

Thank you.

 

[biz]

there is a lot of material on the net. For example qui, qui, qui,...

 

[meccanicamg]

I can tell you that once a colleague of mine was fixed with the use of chains for the transmission of the motorcycle on heavy tanks, but if you have to consider the overload, you often find yourself having to use triple chains. so I highly recommend the use of two-output orthogonal gearbox to move each axis, front and rear, always with two engines.
the use of the epicycloidal embossed reducer leads to a radial load on the reducer that creates reduction of life, especially if the short path is not homogeneous and therefore with the unleveled tracks. the chain itself has an irregular motion due to the polygonal of the mesh on small pinions.
So regardless, in steel mills or in service centers, I would avoid how the plague to use chains that should be maintained and that could break.

 

[meccanicamg]

Another important thing to evaluate is the phase of acceleration and deceleration transition because you have a pair to the wheels above what you have calculated. attention because it is often there that breaks.

 

[meccanicamg]

if you are looking for the forum we have a rich discussion qui, especially from post 12 onwards.

 

[meccanicamg]

if you have to transmit on a single shaft 2*3410nm because the chain joins the gearbox to the wheel axis we have that the chain transmits 11,4kw to 16rpm and imagining to report i=1 we will have:as you can see you need a 28b triple chain that is not at all small. this demonstrates how convenient the use of chains between reducer and axis wheels.
Do you have to move with the reducer? if you could just run a pair of dense wheels lubricate to fat but I would completely avoid the chains.

Can you give us some more information on the technical reasons for choices?

 

[Echindo]

the intention is to use a reducer that guarantees me the reversible motion so to be able to transmit the bike to the right and left I need an angle postponement but I was evaluating other options. I would like to be able to guarantee the possibility to move the cart in case of failures without having to disassemble anything, since if I find the load above the cart, in a point of the path where I can not download it, it is not easy to maintain maintenance when it has certain temperatures

 

[Echindo]

There are various possibilities in my opinion but I wanted to review the size of the chains as I do not use them very much, so that I can assess this too

 

[meccanicamg]

Bye. but if an external design study? Are you car manufacturers?
you could find different solutions within your company if it has history.

I can tell you that using an epicycloid reducer and angular referral is really a very bad solution for a car weighing 150t.

the conical couple, will have to bring a lot of couple and it is not said that it is sufficiently small, besides being an extra cost.

my idea would be to use a 4 pole motor and connect a red orthogonal gearbox, that is, it is built by a small conical couple working at high turns and low torque. the output of the reducer will be to a hollow shaft in which I will be able to accommodate the central shaft with the two couplings to teeth type maina or similar. on each resemblance there will be mounted the shaft with the bearing support from trade or built and then the wheel.

the reducer will be reduction ratio around i=100.

If you use an epicloidal reducer and angular referral you will get the same performance as above, with the disadvantage that you will pay two items besides having to fix them.

in fact they are only the endless screw reducers that are irreversible when the propeller angle exceeds the friction angle.

I hope engines are braked electrically.

If you have a fault, you must be able to access the brake lock lever in the engine.

you should be assisted by your gearbox provider to give you more information about the gearbox to use.

the chain solution I see it just but worse than all, with high encumbrance and difficulty of guaranteeing the duration potrattutto if in dusty environment and without maintenance.

These things I tell you from experience because among the various machines of iron and steel plants I have also made the trolleys that carry around the coils in the sheds ...30t for 4 coils more tara wagon.

 

[meccanicamg]

a reducer for doing the job is red g mr c2i 160 uo2a - 42 x 350 - i=90,4 b8 with brake motor hb3f 160m 4 400-50 b5 from 11kw-1470rpm.having a 94% return I would say that you can drag it even in retrograde motion.

If you have a good purchasing power you take it away to four money and avoid making supports, bearings, pinions, rivii, spacers and various things.

a little more rigid but it is worth towing reliably and lastingly over time.

 

[PIETRO2002]

a reducer for doing the job is red g mr c2i 160 uo2a - 42 x 350 - i=90,4 b8 with brake motor hb3f 160m 4 400-50 b5 from 11kw-1470rpm.View attachment 69091having a 94% return I would say that you can drag it even in retrograde motion.

If you have a good purchasing power you take it away to four money and avoid making supports, bearings, pinions, rivii, spacers and various things.

a little more rigid but it is worth towing reliably and lastingly over time.

ghe pias la caena!!

 

[Echindo]

I agree on what you said @meccanicamg, they were considerations I was doing.
for braking I still have to verify that the available pair is enough to perform it safely.

 

[meccanicamg]

I agree on what you said @meccanicamg, they were considerations I was doing.
for braking I still have to verify that the available pair is enough to perform it safely.

the brake in the motor serves for the stationation because the braking that divides into deceleration is in emergency braking it is electrically done with the motor.
the brake stage allows the wagon to stand at full load even in slope without current available.

will the cart be equipped with laser scanner to allow safety of trampled and airy area?

 

[Echindo]

no laser scan for the safety air is provided for this machine.

 

[PIETRO2002]

no laser scan for the safety air is provided for this machine.

which safety device is used instead of laser scan?

 

[Echindo]

the carriage will have front and rear radar for obstacle detection.

 

[meccanicamg]

the carriage will have front and rear radar for obstacle detection.

basically does the same thing as the laser scanner but with different system.

 

[meccanicamg]

However if you want to use chains, you have qui a step-by-step guide to do so. Put everything in excel and you're operational.

handbook for chain engineering - iwis

 

[meccanicamg]

How did the story end?

 

[Echindo]

How did the story end?

bye, the machine will be expected with ortgonal reducer with the two joints for the transmission of the couple as seen here.
made the various evaluations has rightly ended in the simplest and most efficient solution.