Vibromera forum

Author Topic: field balancing the rotors of mulchers in two planes  (Read 1279 times)

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
field balancing the rotors of mulchers in two planes
« on: July 15, 2018, 04:20:15 PM »
Mr. Shelkovenko,

I'm interested in buying balance-1. I'm wondering if this device is strong
enough for field balancing the rotors of mulchers in two planes.

Thanks in advance.

Best regards

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
Re: field balancing the rotors of mulchers in two planes
« Reply #1 on: July 15, 2018, 04:22:06 PM »
Hello.
We have a huge experience in balancing different mulchers.  https://vibromera.eu/category/example/mulchers/
We send the devices by express mail from Estonia. Parcels in Europe come quickly, about 10 days.



"Dynamic balancer Balanset-1. Mulcher field balancing"

"Dynamic balancer Balanset-1. Mulcher Nokamic field balancing"

« Last Edit: July 15, 2018, 05:15:59 PM by Andrew »

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
Re: field balancing the rotors of mulchers in two planes
« Reply #2 on: July 15, 2018, 05:18:10 PM »
Dear Nikolai,

 A few months ago I bought a balanset-1 from You.
Now  I've started balancing tests, there are problems and I need your help.

1. I tried to balance the 2.5m long mulcher rotor, I did everything in the balancing manual, but the software showed me aunbalance in the P1 cca.1300 grams, in P2 650 grams. When I put this weigths rotor shakes even more, so I have to put weights a couple of times but the rotor is still unpredictable.
When I pull the rotor from the mulcher and put it on stationary balance machine, another software shows 300 grams in both planes and when I set the weights the rotor calms down.

2.  3m long mulcer rotor.
I make test run. Then I put test weight o 1st plane, I spin in and measure, remove weigth.
Put weigth on 2nd plane, spin rotor, measure.
And now starts my problems. Trim balance wants cca. P1=1400g@78deg and 680g@347deg. When I put like sofware said and spin and mesure, next result say something quite different. And rotor vibrate even worse.
So I put more and more weights but result is worse.

Please help me to understand what I am doing wrong.
When I balance on field I cant do anything, but when I put rotors on stationary balancing machine in two spins i can balance abouth anything.
From ten mulcher rotors that I ve tried to balance on field, I didnt  successfully balance even one.

Best regards.

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
Re: field balancing the rotors of mulchers in two planes
« Reply #3 on: July 15, 2018, 05:27:51 PM »
Dear Alexandar
 
1. Be sure that you put the weights in the correct place (angle)
The angle is measured from trial weight position according direction of rotation (as shown on picture below)


2. Be sure that you correctly mount vibration sensors.


I.e. sensor sensitivity direction should be transversely (at right angle) to rotor axis.

3. If you have an balance machine with "soft bearing" you can try use balanset with this machine for testing.
Balanset should to show the same weights as another software, maybe to other angle - according to direction of rotation of rotor.
 
Or you can for beginning try balanset to balance a simple rotors - maybe a small fan etc.
There are video
https://www.youtube.com/watch?v=dzUkNHeFcVM
 

Also there are Step-by-step balancing procedure manual
https://vibrobalance.com/index.html
 
Best wishes
Andrew Shelkovenko

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
Re: field balancing the rotors of mulchers in two planes
« Reply #4 on: July 15, 2018, 05:33:02 PM »
Dear Andrew

Thanks for fast repy. If you could send me one more time pictures i cant see them in mail.
Do sensor position have impact on results. 
I know that sensors need to be on flat surface close to bearings, but do cables need to be parallel?
Please send me picture of right mounted sensor.

Best regards

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
Re: field balancing the rotors of mulchers in two planes
« Reply #5 on: July 15, 2018, 05:35:43 PM »
Important to mount sensors in massive part, not in then thin casing etc. that can resonate.
 
Cable direction is not important.
 
Field balancing of the mulchers is not so easy.
Some times we are forced to use some tricks (see kust1.jpg)


 
Before balancing the mulchers must be repaired, bearings must be in good technical condition, rotate without jamming etc.
 
Best wishes
Andrew Shelkovenko

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
Re: field balancing the rotors of mulchers in two planes
« Reply #6 on: July 15, 2018, 05:36:56 PM »
Thanks,

look I have been constructing and producing mulchers for 11 years now. I've always been balancing on a rigid machine. Now I have a need for services where people do not have to remove rotor from mulcher and bring it to me. I can balance them on the field, but I simply fail.
I'll try your advice, and if I fail, I'll be bothering you for a litlle bit more with my questions.

Best regards

Offline Andrew

  • Administrator
  • Newbie
  • *****
  • Posts: 39
    • View Profile
Re: field balancing the rotors of mulchers in two planes
« Reply #7 on: July 15, 2018, 05:37:34 PM »
OK, of course I'll glad to help. Please feel free to ask.
Nikolai was engaged in field balancing of the mulchers. Sometimes he is failed to reach perfect balancing , because resonant of the  construction, bad bearings and such a like  causes. But vibration should  decreased in any case.