The advantages and disadvantages of the measuring principle of the motor rotor automatic positioning dynamic balancing machine
Published:
2020-05-12 10:38
Nowadays, many motor manufacturers have begun to use automatic positioning dynamic balancing machines, so what is the principle of the measurement method of automatic positioning dynamic balancing machines? What are the advantages? Let's spread the knowledge in this area by the editor.
Automatic positioning dynamic balancing machine
when in use, only the measuring rotor needs to be placed in the measuring station of the dynamic balancing machine. The dynamic balancing machine collects the unbalanced centrifugal force generated by the measuring rotor rotation through the sensing system, thereby determining the centrifugal force of the measuring rotor And location.
Calculation method of rotor unbalance
1. Calculate the allowable unbalance of the rotor
Eper = (G × 1000) / (n / 10)
Eqer --- Allowable unbalance degree unit μ
G --- Balance accuracy grade is generally 6.3
n ---- working speed unit r / min
Example: A work piece with a working speed of 1400r / min and a balance accuracy level of 6.3
Then Eper = (6.3 × 1000) / (1400/10) = 6300/140 = 45μ
2. Calculate the allowable residual unbalance
m = (Eper × M) / (r × 2)
m ------ Allowable residual unbalance unit g
M ------ Workpiece rotating mass unit kg
r ------ Workpiece radius unit mm
Example: Workpiece mass 20kg, radius 60mm, double-sided balance, so calculate the allowable remaining unbalance of each balance plane as
m = (Eper × M) / (r × 2) = 45 × 20/60 × 2 = 7.5g
The advantages of automatic positioning measurement are the high-precision measurement of the dynamic balancing machine, and the measurement rotor does not need to be marked, and the operator does not need to find the angle of the unbalance.
The disadvantage of automatic positioning measurement is that due to the high investment cost of high-precision measurement technology, positioning systems and highly sensitive sensors cannot accurately measure large rotors, and are not suitable for the use of large generator rotors or fan blades.
The above is the principle of automatic positioning measurement of the dynamic balancing machine. I hope to help you. There will be more information later, please pay attention to us!
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