belt drive gearbox vibration

im facing a strange problem at the plant is that the drive set for the belt is vibrating excessively at the beggining of the operation but after while the vibration reduced sharply after 1 hour 

i will provide you by the complete data shortly

Original Post

Just guessing here as little if anything is known about your specific machine.  But based on the extremely limited info you have provided, I would be asking what changes the most in a one hour period after startup?  My answer would be belt tension, but again this is a WAG.

John from PA posted:

Just guessing here as little if anything is known about your specific machine.  But based on the extremely limited info you have provided, I would be asking what changes the most in a one hour period after startup?  My answer would be belt tension, but again this is a WAG.

Sorry for the few information but i will attach some photos 

Its direct drive gearbox with fluid coupling the problem is the excessive vibration at the platform

Should i lubricate all these hinges

Attachments

Photos (5)
Hossam 2 posted:

 

Should i lubricate all these hinges

I don't see that lubricating the hinges would hurt, but I'm also inclined to think it isn't related to your problem.  Having said that I still don;t understand your problem...you have gone from the title of "belt drive gearbox" to now having a "direct drive gearbox with fluid coupling" and the problem is excessive vibration at the platform.

Is this the same machine? 

Can you add some actual data in the form of plots showing this "excessive vibration"?

John from PA posted:
Hossam 2 posted:

 

Should i lubricate all these hinges

I don't see that lubricating the hinges would hurt, but I'm also inclined to think it isn't related to your problem.  Having said that I still don;t understand your problem...you have gone from the title of "belt drive gearbox" to now having a "direct drive gearbox with fluid coupling" and the problem is excessive vibration at the platform.

Is this the same machine? 

Can you add some actual data in the form of plots showing this "excessive vibration"?

Belt conveyor drive gearbox thats what i mean ..lime stone belt conveyor drive unit is consists of a motor is direct coupled with a fluid coupling to the gearbox ging excessive vibration at start and reduced to unacceptable level also at the whole platform

I will attach some data 

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