Research on Vibration Characteristics and Fault Diagnosis of 34CrMo1 Generator with Poor Heat Treatment

Qing Meng Zeng; Bao Tong Chai; Hao Chen

doi:10.4028/www.scientific.net/AMM.893.27

Paper Titles

A Study on Fatigue Life Evaluation of Pressure Vessel Made of ASME SA240-316L Material Using Numerical Analysis
p.1

Elastoplastic Equilibrium of a Hollow Cylinder from an Inhomogeneous Perfectly Plastic Material
p.6

Exploring the Connected Brain by fNIRS: Human-to-Human Interactions Engineering
p.13

Design and Finite Element Analysis of Cargo Hose Tower Structure Using Low Carbon Steel Material
p.20

Research on Vibration Characteristics and Fault Diagnosis of 34CrMo1 Generator with Poor Heat Treatment
p.27

Research on Vibration Characteristics of the Three-Bearings Supporting Structure with Cracks in the Rotor of the 25Cr2Ni4MoV Exciter
p.33

Analysis of Causes of Generator Vibration Faults and Rotor Cracking in a Power Plant
p.39

Static Frequency Test and Leaf Fracture Analysis of Turbine Blades in a Power Plant
p.45

The Theoretical Calculation and Influencing Factors of Yb³⁺Doped Double-Clad Fiber Laser
p.52

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 893Research on Vibration Characteristics and Fault...

Research on Vibration Characteristics and Fault Diagnosis of 34CrMo1 Generator with Poor Heat Treatment

Abstract:

Poor heat treatment of the generator may cause cracks during operation. The presence ofcracks on the rotor causes the rotor to vibrate. The paper establishes a finite element modeling of aunit. The model is used to study the vibration response characteristics of the shafting system when thesupport characteristics of the generator are similar and the difference is significant. When thedifference in support characteristics between the two ends of the generator is large, the first-orderunbalance of the generator not only causes a large in-phase vibration at the first-order critical speed ofthe generator, but also causes a large reverse component. Finally, the reliability of the conclusion isfurther verified by combining the abnormal vibration diagnosis and processing cases of a generator.The innovation of the paper is to diagnose the possible cracks in the generator through the vibration ofthe generator, and then look at the original data in the generator manufacturing process to find that theheat treatment process of the generator rotor is poor.

You might also be interested in these eBooks

Engineering Technology: Properties and Technologies

View Preview

Info:

Periodical:

Applied Mechanics and Materials (Volume 893)

Pages:

27-32

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.893.27

Citation:

Cite this paper

Online since:

July 2019

Authors:

Qing Meng Zeng*, Bao Tong Chai, Hao Chen

Keywords:

Crack, Heat Treatment, Turbo-Generator, Vibration

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] K. L. Cavalca, P. F. Cavalcante, E. P. Okabe, An investigation on the influence of the supporting structure on the dynamics of the rotor system, Mech. Syst. Sign. Proc. 19 (2005) 157–174.

DOI: 10.1016/j.ymssp.2004.04.001

Google Scholar

[2] J. C. Nicholas, L. E. Barret, The effect of support flexibility on critical speed prediction, ASLE Transa. 29(3) (1986) 329-338.

Google Scholar

[3] P. G. Morton, Measurement of the dynamic characteristics of a large sleeve bearing, J. Lubrication Tech. 93(1) (2010) 143-150.

Google Scholar

[4] J. C. Nicholas, J. K. Whalen, S. D. Franklin, Improving critical speed calculations using flexible bearings support FRF compliance data, 15th Turbo machinery Symposium, Texas A & M, (1986).

Google Scholar

[5] E. Swanson, C. D. Powell, S. Weissman, A Practical Review of Rotating Machinery Critical Speeds and Modes, Sound and Vib. 39(5) (2005) 10-17.

Google Scholar