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Messages - Andrew

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31
Yes, in  this  "soft bearing" balancing machine  you can use Balanset-1 to balance rotors.
Balanset-1 use influence coefficients method, so is possible to balance rotors of any weights and size. In this metod you need 3 runs - 1 initial run and 2 runs with test weights.
For detail see Step-by-step balancing procedure
https://vibrobalance.com/index.html
Table 1. Step-by-step operations
 
Note.
You need keep the same (+-10..15%) rotation speed ( RPM ) in every run.
If you use compressed air to rotate rotor it may be some problem.
Maximum RPM for Balanset-1 is about 24000 RPM (400Hz).
In what rotation speed you suppose to balance turbocharger core?

32
Attached you will find the construction that I  do to support and balance a turbocharger core. Please inform me if is going to work with the Balanset-1. 

33
Balanset-1 can be used for balancing rotors with speed up to 30000 RPM.
If you have mechanical part (stand) where you mount turbocharger core, you can use Balanset-1 as vibration measuring system.
It can calculate the weight that has to be add or remove.
 
 
Yes, software and manual are in English.
You can see it also in http://vibromera.com/index.html
 

34
Please inform us if the Balanset-1 can be used for balancing a two plane turbocharger core and also if can calculate the weight that has to be remove. Can the program and manual be in english language?

35
Thank you for your message.
Balanset-1 is a measuring part (electronic device) of the balancing machine. Balanset-1 measure vibration ( amplitude and phase) and calculate balancing weights (mass and angle of mounting place).
For balancing  of an assembled turbocharger core, mechanical part (balancing stand) is required.
If you have a mechanical part, you can use Balanset-1 as a measuring part.

36
Please inform us if the Balanset-1 balancing set is appropriate for the balancing of an assembled turbocharger core.

37
Discussion about Balanset-1 / Dynamic balancing procedure
« on: July 08, 2018, 04:16:26 PM »
Balanset-1 is two-channels balancing system for dynamic balancing of rigid rotors.
Balanset-1 can balance in 1 or 2 balancing planes. It includes two vibration sensors, which will enable you to measure vibration in 2 planes at the same time by one machine run.
We will demonstrate the balancing procedure at our balancing training stand. It consists of electric motor with two disc on the shaft. Electric motor placed on the spring-supported platform. Natural resonant frequency of this system is much lower than rotation frequency of electric motor(3000 rpm - 50 Hz). So, this stand is "after
resonance" type.
There are two vibration sensors which enable you to measure vibration in two planes Balanset-1 balancer includes two vibration sensors(accelerometers), laser phase sensor(digital tachometer), 2-channel USB interface unit with preamplifier, integrators and ADC acquired module, notebook(or other PC) and Windows based balancing software.
Balancing procedure by itself is very simple. It uses 3-run method. In it's first run, (named Run#0 in the program) Balkom will measure the initial vibration of the machine. Then we add the test weight on the first plane of correction and repeat the vibration measurement( Run#1 ). Then we remove the test weight from the 1st
plane, add it to the 2nd plane and repeat the vibration measurement( Run#2 ).
Then software will calculate the mass and it will show us the place(angle) where we have to mount correction weights to reduce the unbalance and vibration.
Theoretically, vibration must be reduced to zero level, but our rotor machine is not ideal and our measurement already has some errors. So, in many cases we need to repeat the balancing procedure. But we don't need to use trial weights again. Once  influence coefficients (balancing coefficients) has been saved in the PC memory,
software will use it for next calculations.
Let's take a look at how it really works.
First step is to install sensors at the point of measurement in the platform. The sensors have magnetic base, so we just place it on the steel part of the platform.
Also you can remove magnetic base and mount sensors using screw M4. Vibration sensors placed on the opposite edges of the platform named correction place 1 and correction place 2.
(Detailed theory of dynamic balancing you can see here.)
Then we have to put a reflective mark on the rotor. Phase sensor- tachometer will use this reflective mark to measure phase of vibration and determine the angular position where we have to place correction weights later.
Then run the program.
In the main window you can select balancing type (static 1 -plane of correction or dynamic 2-planes of correction), vibrometer mode, balancing mode, view charts, and view archives when previous measuring data saved.
Before balancing, it is always recommended to check rotor machine technical condition. For this we can use vibrometer mode.
In this mode we can repeatedly measure and analyse vibration of the rotor machine.
Start electric motor.
Click on F9 button - "Run"
In this window shown vibration value and phase. Here Vs is RMS of vibration in the frequency wide range.
V0 is amplitude of vibration on rotation frequency.
Important!
Only V0 will tell us about unbalance value!

If V0 is close to zero value - it means that unbalance is close to zero too.
In the chart shown below we can see diagrams of the vibration wave form and spectrum of vibration function.

"Dynamic balancer Balaset-1. Vibration wave form and spectrum charts"

There are 2 harmonic peak - about 5 mm\s on the 50 Hz and about 2 mm\sec on the 100 Hz.
Peak on the 50 Hz characterize unbalance, but peak on the 100 Hz caused by the other reasons.
Here we see V0 is close to Vs, so we can conclude that main reason of the vibration is unbalance.
Now let's try to balance our rotor.

Click F7 - Balancing in the main window.
Input the required data in the window appeared on the screen.

"Dynamic balancer Balaset-1. 2-plane balancing settings window

1. Set New rotor if you balance rotor first time or Select rotor if you are going
to balance a rotor which you have balanced earlier.
2. Weight trial mass. We use an electronic weighing scale to measure mass.
3. If you need to split weight select Blades, else select Polar.
4. Set radius of trial mass mounting place.
Now we can begin to balance.
Run#0 measure initial vibration
Start electric motor. Wait for a while until the rotation speed value comes stable.
Then press F9 button Run
Vo1 and Vo2 vibration value on 1x rotation frequency.

"Dynamic balancer Balaset-1. 2-plane balancing. Run#0 without trial weights

Run#1
Add test weight on the first plane of correction and repeat vibration measurement.

"Dynamic balancer Balaset-1. 2-plane balancing. Run#1 with trial weight in plane 1

Run#2
Remove test weight from the 1st plane, add it to the 2nd plane and repeat vibration
measurement.

"Dynamic balancer Balaset-1. 2-plane balancing. Run#2 with trial weight in plane 2

This software will show you the mass and the place of the correcting weights.
Remove test weight from the 2nd plane and add correction mass M1 and M2 on the
angles f1 and f2 , as shown on the screen shot.
Be sure that you place masses correctly by the direction of rotation
from trial weight place.

"Dynamic balancer Balaset-1. Correction weights moounting

Then we should check result of our balancing.
Run machine again (RunC)

"Dynamic balancer Balaset-1. Trim balancing.
-------
We can see that vibration caused by the unbalance reasons (on 50 Hz frequency) is
reduced to more than 10 times.
We can make a next trim step and add new correcting weight M1=0.049 g.
M2=0,007 g is too small, so we don't need to add it. (But you may add this weight
to obtain more precise balancing)

Then check result again
RunC-2

"Dynamic balancer Balaset-1. Trim balancing? step 2

Vibration in the 1st correction plane is reduced to more than 200 times and in 2nd
plane - more than 40 times.



38
I'll try to answer your questions.
 
1. Our balancing system (Balanset) use test run to get  the balancing (influence) coefficients. First run - to measure initial vibration, 2-nd and 3-d run with adding known test mass - to get  vibration changing and calculate influence coefficients, the correcting weights and place (angle) of mounting the correcting weights.
2.  Yes, in some cases we can adapt hardware with other sensors.  Software can change sensor sensitivity in the "Settings"
3. We can't deliver source code, but we can change user interface color, fonts etc for you requires.
4. We'll glad to help.  We provide support for users to solve the balancing problems using Balkom balancer system.
5. We can add polar graphics to our software. Some versions of software has it.

If you have any questions please feel free  tocontact us.

39
Dear Mr.
I am very interested in your balancyng system
I will integrate this system in a old balancyng machine, but please let me know if you can to help me with some requirements

1.- Do yo have some calibration procedure to calibrate sensor with Know mass?
2.- This software can be adapted with other sensors, having data sheet of course
3.- Can you deliver y me a sourse code program in order to modificate some characteristic like colors, font types, windows wide and position aspect.
4.- I will appreciate so much if you can to hep me with this..
thanks and regards,
5.- Can this software to show in polar graphics ?

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