Structure Damage Diagnostic Method of High-Flow Control Valve Stem

Fang Cao; Rong Jian Kang

doi:10.4028/www.scientific.net/KEM.667.408

Paper Titles

Developing of the Experimental Device that Test Magneto Rheological Fluid(MRF) Shear Yield Stress Nnder Non Uniform Composite Field
p.385

Development of a Chemiluminescence Detecting System Based on FPGA
p.391

Diagnostic Testing on Crack Propagation of Asphalt Pavement Materials
p.396

Stress Analysis of Stepped Oblique End-Face Combined Concave Die Based on the Least Square Method
p.402

Structure Damage Diagnostic Method of High-Flow Control Valve Stem
p.408

The Electrothermal Heating Tube Membrane Resistance Test Method Research
p.413

Design of the Auto-Stiffness Measuring Instrument for Electro Hydraulic Servo Valve Elastic Element
p.419

HLP Type Hydraulic Oil Analysis for Meso-Scale Hole Measurement
p.427

Advances in Skin Viscoelastic Detection Methods and Equipments
p.433

HomeKey Engineering MaterialsKey Engineering Materials Vol. 667Structure Damage Diagnostic Method of High-Flow...

Structure Damage Diagnostic Method of High-Flow Control Valve Stem

Abstract:

According to the real structure and work condition of a high-flow mixed gas control valve used in recycling generating electricity project, a modal analysis model based on fluid-structure coupling system of control valve is set up. The natural frequency and mode of valve plug and stem is obtained. The structure damage diagnostic method of high-flow valve stem is put forward. According to the change of natural frequency of the valve stem to judge appearance of fracture cracks is explored. According to the amount by which the variation of natural frequency to determine the size of crack is discussed. It is the preliminary diagnosis to the damage of a high-Flow control valve stem in the special working environment, to avoid the gas leaks, the failure of valve action, adjust or commutation, etc.

You might also be interested in these eBooks

Advanced Engineering Materials and Processing Technologies

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 667)

Pages:

408-412

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.667.408

Citation:

Cite this paper

Online since:

October 2015

Authors:

Fang Cao*, Rong Jian Kang

Keywords:

Diagnostic Method, Fluid-Structure Coupling, Modal Analysis, Structure Damage, Valve Stem

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] W.G. Jiang. The repair of stem injury at the scene. CHINA ADHESIVES, Vol. 18 (2009) No. 8, p.62. (In Chinese).

Google Scholar

[2] F.M. Zhang, C. Xie. Analysis and resolving for the causes of frequent trouble of HP heater interlet and outlet Motor-operation valve. Valve, Vol. 1 (2004) No. 2, pp.34-36. (In Chinese).

Google Scholar

[3] F.M. Zhang, C. Xie. Cause Analysis and Treatment for the Frequent Faults of HP Heater Interlet and outlet Motor-operation Gate Valve of the 600 MW Unit. Zhejing Electric Power, Vol. 1 (2004) No. 2, pp.54-56. (In Chinese).

Google Scholar

[4] Y.D. Li, A.P. Sima, Y. Zhou, et al. Cause Analysis of Cracking of a Plug in Low Pressure Bypass Valve. Heat treatment of metals, Vol. 32 (2007) Supplement, pp.152-155. (In Chinese).

Google Scholar

[5] Tornari V, Bonarou A, Zafiropulos V, etc. Structural evaluation of restoration processes with holographic diagnostic inspection. Journal of Cultural Heritage, Vol. 1 (2003) No. 4, pp.347-354.

DOI: 10.1016/s1296-2074(02)01150-0

Google Scholar

[6] Kreis，T: Handbook of Holographic Interferometer (Wiley-VCH, Berlin 2004).

Google Scholar

[7] Z.W. Wang, Q.N. Fei, W. Mei, et al. Fracture analysis of high pressure main steam valve stem of a 300 MW steam turbine. Heat treatment of metals, Vol. 36 (2011) No. 8, pp.21-24. (In Chinese).

Google Scholar