Improved holographic dynamic balancing method of high-speed main shaft
A high-speed spindle and balancing technology, applied in the field of holographic dynamic balancing, can solve problems such as wrong diagnosis conclusions, monitoring false alarms, etc., and achieve the effects of improving efficiency, improving accuracy, and expanding the scope of application
Inactive Publication Date: 2011-06-22
XI AN JIAOTONG UNIV
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Problems solved by technology
Therefore, if the traditional holographic dynamic balance method is used to monitor the high-speed spindle system, due to the non-negligible roundness error on the measurement surface, the false signal caused by the error will be superimposed on the real vibration signal of the rotor, and in severe cases it will cause False alarms in monitoring may lead to wrong diagnostic conclusions
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[0027] In order to understand the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0028] figure 1 Shown, the concrete balancing step of the inventive method is:
[0029] Step 1, collecting the original vibration signals of the two test sections at the balanced speed of the faulty spindle;
[0030] Step 2, according to the error separation technology of the three-point method, the roundness error separation is performed on the vibration signals of the two sections at both ends of the main shaft, and the actual axis center track after the roundness error is eliminated is obtained;
[0031] Step 3, according to the information fusion technology, obtain the power frequency two-dimensional hologram of each test section for the x and y components of the axis trajectory obtained in step 2; judge whether the main vibration main fault source is unbalanced; obtain each test The initial pha...
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The invention discloses an improved holographic dynamic balancing method of a high-speed main shaft. The method is characterized in that: an error separation technique of three-point method is combined with a holographic spectrum technique, roundness error of a vibration signal is separated by the error separation technique of three-point method, and the dynamic balancing identification is performed on actual locus of journal center of the main shaft by holographic spectrum dynamic balancing theories, which effectively eliminates interference caused by the roundness error of a measured section to unbalance calculation and improves balancing precision and efficiency. Compared with the traditional 'holographic dynamic balancing method of rotators', the improved holographic dynamic balancingmethod can be used for qualitative error separation and unbalance error identification of the main shaft with the roundness error and fluctuant operating speed, unbalance measurement and estimation of the main shaft and establishment of a balancing plan, and have very high application value in improving efficiency of failure examination, reducing uncertainty of repetitive balancing operations andthe like.
Description
technical field [0001] The present invention relates to a rotating machinery fault diagnosis and control method, in particular to a holographic dynamic balance method based on the three-point method error separation technology, which can be used for qualitative separation of spindle faults with roundness errors on the surface and fluctuations in operating speed. Identifying unbalanced faults, measuring and estimating the unbalanced amount of the main shaft, and formulating counterweight schemes. Background technique [0002] "Rotor holographic dynamic balancing method" (Chinese invention patent ZL97108694.X) discloses a method of using the principle of holographic spectrum information fusion to monitor and diagnose the operating state of the rotor using the vibration signal of the rotating machine. The method is based on the cross-sectional shape of the measuring surface It is the assumption of an ideal circle. On the one hand, the measurement section of the main shaft rotat...
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IPC IPC(8): G01M1/38
Inventor 梅雪松章云姜歌东陶涛吴玉燕杜喆
Owner XI AN JIAOTONG UNIV