Research Of Dynamic Balancing’s High Precision And Key Techniques In The Dual Rotor System With Little Rotating Speed Difference

The rotor system is the core component of large rotating machinery, its dynamicbalancing problem is paid more attention because of the modern industrial’s higherdemand in machine’s efficiency an precision. The double rotor system with littlerotating speed difference plays an important part in the rotor system. This paper usesfull vector dynamic balancing to solve the disadvantages of traditional single channelinformation in rotor’s dynamic balancing. To proving the precision of full vectordynamic balancing is higher than the traditional method, two groups of experimentsare taken through two horizontal screw centrifuges. The main works are done asfollows:1、Starting from the problem of unit disc rotor system’s mass eccentricity, thenthe imbalance fault mechanism is analyzed and the imbalance fault type is researched.To move forward a single step, through building models, complicated problem issimplified and dynamic analysis is performed. What the previous works providestheoretical basis for full vector dynamic balancing.2、Influence coefficient method in rigid rotor and flexible rotor is analyzed. Bystudying traditional influence coefficient method’s insufficient, full vector spectrumtechnology is to elicit, and then putting forward full vector dynamic balancing. Itssuperiority is proved by experimental data which is gained in the Bently rotor test bed.To reduce the complexity of unbalance response’s algorithm, simple algorithm whichoptimizing calculation process and improving dynamic balancing’s efficiency isproposed.3、The horizontal screw centrifuge’s structure and its working principle areanalyzed because of it’s typical in dual rotor system with little rotating speeddifference. Two centrifuge equipments at te scene as experiment platform andPDES-E with full information fusion algorithm as experimental apparatus, twogroups of test is taken using full vector dynamic balancing. Through the analysis of test results, the precision of full vector dynamic balancing is higher than traditionalmethod is proved.