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Theoretical Analysis and Experimental Study on Field Dynamic Balancing of Rigid Rotors

Author: SunYanTian
Tutor: LiuChengYing
School: Tsinghua University
Course: Mechanical Engineering
Keywords: Rigid rotor Field Balancing Maximum vibration Influence coefficient Initial phase point
CLC: TH113
Type: Master's thesis
Year: 2005
Downloads: 761
Quote: 13
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Abstract


Consider only a single direction for traditional rigid rotor balancing vibration information and maximum vibration field measurement, and field balancing system once equilibrium experiments accuracy of inadequacies, through a combination of theoretical analysis and experimental research, to further improve the rigid rotor Field Balancing theory, the development of the rotor field balancing analysis software. The thesis work includes: 1. According to the characteristics of the rotor unbalance vibration axis orbit, establishing the computational model based on the vibration signal processing method unbalanced rotor vibration and minimum vibration and gives experimental verification. The realization of the model to solve the maximum site measurement problem of unbalanced vibration value, the formula applied to improve balance efficiency, easy to measure the effect of the actual rotor balance. 2. Elaborate test weight relationship of the error and corrected the error, error and amplitude error of two cases from the point of view of the amount of unbalance aggravating way analysis of Test Weights error, sensor mounting angle and discuss the impact of the vibration amplitude measurement error. Summary of the vibration sensor, measuring the plane correction planes and test major small main test parameters selected principle. Elaborate test weight phase angle scale criteria, and made indirect use of vibration signal balancing speed rigid rotor dynamic balancing computing field balancing method. 3 on the basis of the analysis of the existing two-plane influence coefficient method, the initial phase point vector as vibration measurement directly applied to the calculation of the influence coefficients, the influence coefficient method proposed initial phase point. Heavy impact by trial experiments show that the influence coefficient with respect to the phase effects of the influence coefficient of the change in angle of the vibration influence coefficient of the measurement items, the test weight on the early phase points than three influence coefficient of the horizontal vibration and vertical vibration, the maximum vibration phase and more. The influence coefficient equation simulation analysis shows that the changes affecting the phase of the coefficient for correcting the calculated amount of influence, especially for correcting the counterweight angle. The experimental results show that the single rotor and double rotor scene once dynamic balance, traditional one-way vibration influence coefficient method its a balancing effect to some extent dependent on select appropriate test weight. Maximum vibration influence coefficient method is an effective balancing method, the initial phase point the influence coefficient rule is a relatively stable rigid rotor field balancing method. 4 the rigid rotor field balancing method of this research, the development of the rotor field balancing analysis software, and integrated into the \The analysis software measurement data preprocessing and allowable vibration query function, excluding abnormal measurement values ??after the time and the the multiple boot state's speed and vibration measurement value sample mean, and by the speed with unbalanced vibration measurement instance initial quantitative data credibility of the entire test system.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanics (mechanical design of the basic theory ) > Mechanical kinetics
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