Crate Washer Conveyor Gearbox Over Heating

What happens if you increase the oil level?

What has changed to make it overheat now?

What is a high 2X and 3X in terms of amplitude and frequency?

It could..... How is it couplered. Your shaft may be out of alignment, or the gearbox is undersized. Not much to go on here.

Can you find some history of repaired gearing? and know more?

Could there be an adjustment in the 'meshing' pressure? (an alignment, too)

Could a bearing surface be a problem as well?

Could a conveyor 'cog'/ roller etc be a problem? (attached drag, etc...?)

possibly, with more information.

there is very little to go on here. as far as repair. if it's a smaller gearbox your ROI can be limited.

First check to see if the gearbox is in spec. then look (if one is competent as a designer) to see if the gearbox is sized correctly.

Sorry for the delay to respond, this was becauseCR4 was not opening in my country

The gear box is new because the plant is new as well.

the 2X and 3X are at 4.1 mm/s and 5.2 mm/s which shows an alert from the power spectrum. The load on the gear box is only the empty crates of beer which I believe its not too much. the conveyer has 2 shafts ( driven and driving) and have flange bearings, I took the vibration data for both shafts and they were no signs of alarms noted. I have recommended to check for the alignment on the next maintenance day as well as to establish the right oil level. this is going to be done on Monday next week then I shall give you feed back after checking for what you have suggested.

There really isn't much to go on:

some of the information would be :

• Size of conveyor
• Type of belt (specs)
• Belt speed
• Curves
• Incline
• Loading
• Speed
• Existing reducer specs
• Motor specs
• Product weight
• Type of guides or sliders, (what the belt is riding on)

How do you know it is over heating? If this is a worm drive, they are relatively inefficient and run hotter than you might expect. Many are supplied with synthetic lubricant, partially because of this. You can re-calculate the load by measuring the torque required to move the loaded conveyor and factoring in the speeds and ratios involved to see if the gearbox is over loaded.

Have you had an engineer look at the designed load capacity's of the unit for the load and speed for which your operating. I would certainly start by contacting someone who know how to size one of these units. Then go from there as it sounds under sized.

Dear Mr.oliviak,

The data provided by you is not sufficient.

It appears to me, from your posting that during SELECTION/SIZING of the Gear Box - some mistake occurred or error introduced knowigly or un-knowingly. They include, Service Factor, Shock Load, Continuous or Intermittent Operation, Thermal Rating etc.

On the other operational part, pl. check up Root-Clearance, Check up the the Grade of oil conforms to the manufacturer's recommendation, ventilation aspect etc.

Pl.post the full detail, and also post how it was solved.

DHAYANANDHAN.S

To really help you find the problem first we need a lot of information.

• Type of gear reducer?
• Oil specification?
• Input speed?
• Gear reduction - ?:?
• H.P. of motor?
• Length of conveyor?
• Conveyor turns or incline?
• Gearbox manufacturer?
• Size of conveyor
• Type of belt (specs)
• Belt speed
• Loading
• Product weight
• Type of guides, sliders, rollers?

And a picture is worth 1000 words.

Good luck

Hi

First you need to find out if it is overloaded (Tong test to get amps)

If it is overloaded (empty crates make no difference conveyor can be overloaded with no product) you have found a problem if not check actual temperature with gauge (as feel can deceive) if close or over stated operating temperature then you have found a problem if not do you have a problem?

Still wont hurt to check alignment if couplings are rigid

My go on this will most mainly focus on the gear oil, if the oil is contaminated and quality has depleted this could lead to overheating. secondly if you are using a wrong oil grade, wether just starting to use it or it has been a practise over time that can cause it.another area you can look at is that there might be loosed or mis alligned sections inside the gear train, opening up and checking the gears will be a good idea, good luck

Does the box meed the specified requirements? If so, take an oil sample, if possible while its hot, and have it analyzed for viscosity and contamination as I suspect its undersized and the resulting drop in lube viscosity, as it overheats, will lead to loss of film strength and its ultimate demise.

The gear box is from SEW and rpm is 1435/31. We checked the alignment and did some correction as you had sugested. The temperatures droped but am still monitoring it till next week. Also analysed the oil and it was fine. About the size rating of the drive, i can't tell since the crate washer was installed by Krones who brought it already assembled.

Please see the pictures below.