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Flexible rotor holographic dynamic balancing method based on empirical mode decomposition

An empirical mode decomposition, flexible rotor technology, applied in the field of rotor dynamic balance, can solve no related problems

Inactive Publication Date: 2008-11-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, empirical mode decomposition is in the following patents: Computer implemented empirical modedecomposition method, apparatus and article of manufacture (US invention patent 5983162), Computer implemented empirical mode decomposition method, apparatus, and article of manufacture for two-dimensional signals (US invention 专利6311130),Empirical mode decomposition apparatus,method and article ofmanufacture for analyzing biological signals and performing curve fitting(美国发明专利6381559),Computer implemented empirical mode decompositionmethod apparatus,and article of manufacture utilizing curvature extrema(美国发明专利6631325),Empirical mode decomposition apparatus,method andarticle of manufacture for analyzing biological signals and performing curvefitting (美国发明专利6738734),Three dimensional empirical modedecomposition analysis apparatus,method and article manufacture(美国发明专利6782124)Empirical mode decomposition for analyzing acoustical signals(美国发明专利 6862558), it has been successfully applied in different fields, but there is no related technology to apply it in dynamic balance

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  • Flexible rotor holographic dynamic balancing method based on empirical mode decomposition
  • Flexible rotor holographic dynamic balancing method based on empirical mode decomposition
  • Flexible rotor holographic dynamic balancing method based on empirical mode decomposition

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Embodiment Construction

[0092] The invention firstly collects the data of the faulty unit, uses the holographic spectrum technology to diagnose the fault type of the unit in operation, and correctly distinguishes the rotor imbalance from other types of frequency conversion faults. The vibration condition of the rotor and the on-site balance conditions, select the balance surface.

[0093] refer to figure 1 As shown in (a) and (b), where (a) means that if the initial phase point is to be moved by angle δ on the rotation frequency ellipse, the rotor trial weight should be moved by angle ω. In general, δ≠ω. Among them, φ is the compensation angle. Figure (b) is a schematic diagram of rotor rotation, where ω is the angle of rotor rotation.

[0094] refer to figure 2 As shown in (a) and (b), figure 2 In (a), 1 and 2 are two eddy current sensors for measuring shaft vibration arranged at 45° left and right near the A bearing; 3 and 4 are two eddy current sensors for measuring shaft vibration arranged ...

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Abstract

The invention discloses a holographic dynamic balance method based on empirical modal breakdown flexible rotor, which is characterized by the following: resolving the data of rotor in the whole speed raising course through empirical modal breakdown advantage based on holographic spectrum information integral elementary and system theory; extracting the industrial frequency component; drawing the holographic baud graph; calculating the weight quality and orientation of different rotary speeds, especially near the weight information of critical rotary speed. The invention breaks through the limitation of traditional stable data and reduces the risk, which can reach the better balancing effect.

Description

technical field [0001] The invention belongs to the technical field of rotor dynamic balance, belongs to the field of fault diagnosis and control of rotating machinery, and in particular relates to a flexible rotor holographic dynamic balance method based on empirical mode decomposition. Background technique [0002] Now there are two general methods of flexible rotor balance: modal balance method and influence coefficient method. The idea of ​​the modal balance method is to balance the modes of each order within the entire speed range of the rotor according to the orthogonality of the modes, and finally achieve the goal of rotor balance. [0003] When using the modal balance method for balancing, the balance speed is best selected near the critical speed. However, because the vibration is relatively large near the critical speed, the traditional modal balance method just requires that the speed be close to the critical speed. Dwelling to obtain steady-state data presents a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/16
Inventor 屈梁生盖广洪
Owner XI AN JIAOTONG UNIV
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