Re: VRM- VERTICAl roller mill

  Sir Neal, .....

I think this limit for  VRM G.B point . but i want to know limit of vib.on mill body.

Normally sensor install one meter above the table on body.

 thanking you  for fast responce.

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Re: VRM- VERTICAl roller mill

Dear GKS,

First of all it is bad for Gear box to  run on max vibration level.  Evey manufacturer has their own norms for Vertical Mill vibration levels.

1) FLS gives tripping level of 6mm/sec on vibration immediately of main motor.

2) Loesce give tripping level on body vibration around 13mm/sec of main motor.

But we should be very care ful during opeation not to go more than 2mm/sec

Best Regards,

Maddy

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Re: VRM- VERTICAl roller mill

 Dear maddy,

           I think 13.0 mm/sec. high alram only .(if vibration is percit for 20.00 sec). if vib.more than  20.0sec. than mill motor tripped.

  but   i want to know .how they give  this limit on basic in mill body welding quality or

 mill body material of costruction because after some year mill  body required more repairing job and rocker arm replacement .

 if anybody have an idea for above matter. pl send mail on my id

 GK SHARMA

girish_1966@yahoo.in

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