Originally Posted by aliawad1974

Dear Sirs

May asked for how to align 3 pairs 68 m long 4.2 dia 4 stage preheater with prepol cacinar rotary kiln in hot condition . and does any one help me with align old girth gear with dual pinions ( old ) .

Thanks

A. A. Awad

Asalaam alaikum Ali,

You mention pinions are they pinion gears or the simple pins allowing the kiln to tilt and dump its treated product

A pinion gear will rotate much much faster in rotation than the ring gear on the kiln body and wear at a faster rate.

Is one gear passive acting as a simple idler ? and the other active or are they both driven gears?

Are the gears bevel or spur gears-flat cut gears?

I believe the normal method of repair is to raise the end of the kiln and replace the gears and then lower the kiln body back down upon the gears. Are their any steel tires to support the weight of the kiln?, they would need to be replaced as well to maintain a true path for the kiln during rotation at speed

The first thing I would ask is how worn are the gear teeth? , that would be an

automatic sign of misalignment as the kiln will drop in height from the wear upon the gears from the weight of the kiln and the ore being heated.

Is the kiln rotated using a roller chain drive through a drive gear to the ring gear upon the kiln body or a gear to gear drive at the front and rear of the kiln body with a common shaft from front to rear?

Are the gear teeth bolted in place?, are there shims behind the gear teeth?

It may be as simple as adding shims behind the gear teeth.

I am unsure how to help further, but if you have a good photo or photos that would help us to help you.

A licensed surveyor would be of some signifigant help to you in guaranteeing alignment and maintaining linear alignment as a transit or theodolite would be employed to secure proper alignment of the kiln and would show you where it ihas settled and needs repair.

The surveyor could also determine if part of the slab supporting the kiln has settled on you and that may be a signifigant source of the problem.

I am sure someone on the forum will be able to help you further with this easily as I probably missed something and I aplogise in advance for that.

lzaharis ■

Originally Posted by aliawad1974

Dear lzaharis

The ring gear i talked about is spur flanks with double drive pinions thats i thing that i could prepare new pinions but not the ring gear .

Yes the pinions are worn too much than ring gear but my question how could i re align that drives after grinding the ring gear flanks , and may i ask the procedures .

If we supposed that gear drives for rotary mills flange mounting

and not for rotary kiln would be any change in alignment procedures?.

I thought that i could changed the lubrication methode from spray lubrication to immersion lub. is that possible or there are some hindrance.?

Thanks

Greetings and salutations Ali,

I have been away for a bit so I must catch up, about the pinion gears are the shafts for the pinions supported with bronze bearings or roller bearings?

The pinion gears must mesh fully, th espray lube is the best lubrication for exposed gearing.

Is it possible to obtain the original measurements for the pinion gears from the manufacturer.

can you forward a picture to me at lzaharis@yahoo.com if possible ■