Small-sized double-rotor fault simulation experiment table and fault diagnosis simulation method

A fault simulation and test bench technology, which is applied in the field of rubbing fault simulation experiments, can solve problems such as inconvenient maintenance and difficult disassembly, and achieve the effect of complete functions, compact structure, and protection system

Active Publication Date: 2022-08-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the improvement of the structure and complexity of modern mechanical equipment, it is difficult to disassemble and inconvenient to maintain.

Method used

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  • Small-sized double-rotor fault simulation experiment table and fault diagnosis simulation method
  • Small-sized double-rotor fault simulation experiment table and fault diagnosis simulation method
  • Small-sized double-rotor fault simulation experiment table and fault diagnosis simulation method

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Embodiment Construction

[0084] The content of the present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0085] like Figure 1-Figure 4 , Image 6 As shown in the figure, a small double-rotor fault simulation test bench includes the base of the test bench and two other main components. Among them, the first part is the upper mechanical part, namely the mechanical simulation module; the second part is the lower embedded control part.

[0086] The mechanical simulation module includes two three-degree-of-freedom adjustable motor bases, a motor with an encoder installed on the motor base, and two coaxial rotors (one of which is directly installed on the shaft and connected to the motor through a coupling). , one of the motors is fixed on the sleeve, the inside of the sleeve is mounted on the rotating shaft by two bearings, and one end of the sleeve is connected with the other motor by a coupling, this structure can make the two ...

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Abstract

The invention provides a small-sized double-rotor fault simulation experiment table and a fault diagnosis simulation method. The experiment table comprises two main components. The first part is an upper mechanical part, and the second part is a lower embedded control part. The mechanical part is mainly composed of double rotors rotating independently and a case simulating faults, and the embedded control part is composed of a vibration acceleration sensor, a rotating speed sensor and all modules. Wherein the lower embedded control part can realize communication with a matched upper computer, and data processing and analysis are realized by adopting a fault diagnosis method based on variational embedded multi-scale permutation entropy (veMPE).

Description

technical field [0001] The invention belongs to the technical field of rubbing fault simulation experiments, and in particular relates to a small double-rotor fault simulation test bench and a fault diagnosis simulation method. Background technique [0002] The double-rotor structure is common in all kinds of machinery. The blade-casing rubbing is one of the common mechanical faults of aero-engines, which affects the running stability and safety of the engine. When the blade tip clearance is large, the blade-casing rubbing may be local rubbing, the fault characteristic frequency is the blade passing frequency and its multiplier, and there are modulation sidebands of high and low pressure shaft frequencies on both sides of the blade passing frequency; When the blade tip clearance is small, the blade-casing rubbing may occur all-round rubbing, showing strong self-excited vibration caused by dry friction. [0003] With the improvement of the structure and complexity of modern ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02G01M13/028G01R31/34G09B25/02
CPCG01M13/02G01M13/028G01R31/346G09B25/02Y02T90/00
Inventor 李永波付浩杨玉龙王建华邓子辰李冰布树辉张凯
Owner NORTHWESTERN POLYTECHNICAL UNIV
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