Online test method for characteristic parameter of bearing-rotor system

A technology of online testing and characteristic parameters, applied in mechanical bearing testing, testing of mechanical components, testing of machine/structural components, etc., can solve difficult problems such as online measurement of bearing-rotor systems

Active Publication Date: 2013-05-01
XI AN JIAOTONG UNIV
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Problems solved by technology

These methods are difficult to apply to the on-line measuremen...

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  • Online test method for characteristic parameter of bearing-rotor system
  • Online test method for characteristic parameter of bearing-rotor system
  • Online test method for characteristic parameter of bearing-rotor system

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Embodiment Construction

[0058] The present invention is described in further detail below in conjunction with accompanying drawing:

[0059] Taking the small-scale multifunctional rotor-bearing test bench in the key laboratory of modern design and rotor bearing system of the Ministry of Education of Xi'an Jiaotong University as an example, the implementation process of the present invention is specifically introduced:

[0060] Step 1, see figure 1 , on the bearing-rotor system supported by the sliding bearing, the eddy current displacement sensor 5 is installed at the first sliding bearing 2, the second sliding bearing 4 and the mass disk 3 at 90° to measure the horizontal and vertical directions. Vibration signal, point C signal at the first sliding bearing 2, point B signal at the second sliding bearing 4, and point A signal at the mass disk 3; the front processor 6 of the eddy current displacement sensor 5 is connected to the signal acquisition instrument 8 , the signal acquisition instrument 8 i...

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Abstract

The invention discloses an online test method for a characteristic parameter of a bearing-rotor system. The online test method comprises the steps of: installing a signal acquisition system on the bearing-rotor system supported by a sliding bearing; regulating the rotation speed of a main shaft, and starting a drive motor and a signal acquisition instrument; acquiring vibration signals of specific positions in real time by an eddy current displacement sensor, and storing the vibration signals by the signal acquisition system; establishing a bearing-rotor system model by adopting a finite element method; and applying a characteristic parameter optimization method of the bearing-rotor system based on combination of machinery dynamics modeling with a genetic algorithm to ensure that a theoretical vibration state obtained through the simulation model is close to an actual measurement value, thereby realizing online solving of the rigidity and damping coefficient of the sliding bearing, the off set of a rotor and the like of the bearing-rotor system. Compared with the traditional method, the online test method disclosed by the invention has the obvious advantages that external excitation or multiple machine start/stop does not need to be performed on the bearing-rotor system, and the online test method is simple and reliable and has the characteristics of high efficiency, high stability and high precision.

Description

technical field [0001] The invention relates to the technical field of characteristic testing of a bearing-rotor system, in particular to an online testing method for characteristic parameters of a bearing-rotor system. Background technique [0002] For the bearing-rotor system supported by sliding bearings, the stiffness and damping characteristics of the bearing and the eccentric mass of the rotor have a decisive influence on the vibration state of the whole system, so they are concerned by engineers and technicians. For a rotating machine in operation, it is necessary to consider the changes in the operating state of the mechanical equipment during use, so as to analyze whether the current operating parameters of the rotating machine (such as: stability, rotor eccentricity, etc.) exceed the The specified thresholds are used to evaluate the safety level of the equipment in the current operating state. However, the traditional measurement method usually needs to be obtaine...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01M13/04
Inventor 张优云朱永生张征凯师浩浩朱晓然祁文昌周智
Owner XI AN JIAOTONG UNIV
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