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Abstract: Unbalanced vibration signal of coaxial dual-rotor system
with little rotating speed difference is a composite signal called
“beat”, which is composed of uneven vibration of internal and external
rotor. Through studying the characteristic of beat, a method of
separating two rotors’ unbalanced weight from beat is put forward. The
effect between two rotors’ unbalanced vibrations is very weak ,which is
proved by experiments and theoretic calculation. Eight effect
coefficient method is brought out to deal with whole machine balancing
for dual-rotors systems with little rotating speed difference. Balancing
experiments successfully are made in two ways, balancing outer rotor
singly and balancing two rotors simultaneously. Practice prove that
eight effect coefficient method can get high balancing precision,
simplify the balancing of this rotors system and has great application
prospect.
Key words: Dual-rotor Whole machine balancing Signal process
CLC No: TQ051.8
国家自然科学基金资助项目(598750789).
Received 20030822, received in revised form 20040310
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