Dissertation > Excellent graduate degree dissertation topics show

Diagnosis of Vibration Fault of Waste Heat Stream Turbine Based on Hierarchical Classification

Author: SunYingJie
Tutor: YeChun；YangZhen
School: Shanghai Jiaotong University
Course: Power Engineering
Keywords: waste heat stream turbine vibration fault hierarchical classification vibration characteristic value fault diagnosis rules
CLC: TM311
Type: Master's thesis
Year: 2011
Downloads: 54
Quote: 1
Read: Download Dissertation

Abstract


The blast furnace gas generated in the Blast furnace process (BFG) and the waste heat steam generated in coke dry quenching process (CDQ) are very valuable secondary energy in the Iron and steel enterprises, the elution rate of blast furnace gas and waste heat steam is also an important assessment indicator of the energy systems, so full use of the secondary energy is the first choice for the company to do energy saving. The waste heat turbine generators are the matching equipment of CDQ boiler, which take on the task of waste heat power generation and pressure adjustment in the low pressure steam pipe. Once the turbine generators downtime occurs, the pressure steam bleeding and the steam pipe network pressure fluctuations will result in large economic losses.As waste heat turbine equipment management, the statistics in detail of the failures about two condensing units in recent years shows that shutdown caused by Vibration fault occupied a large proportion. Search for vibration fault mostly rely on the experience of managers and maintenance personnel, it is lack of targeted which resulting in a low success finding rate and waste of manpower and resources.For the above, this paper focuses on the research work carried out as follows:Firstly, some basic concepts of vibration and vibration feature extraction methods are introduced, the mechanism of vibration fault commonly or possibly happened on the waste heat unit are researched, the vibration characteristics of various typical faults are summed up.Secondly, establishing the fault classification hierarchy of waste heat unit according to the diagnosis method, and then establishing the knowledge element of the concept node and the diagnosis rule base of vibration fault taking vibration parameters as primary and thermal parameters as secondary. Fault recognition and treatment table are developed according to the habit of field staff and structural features of the unit, it is to improve the efficiency of fault-finding and treatment. Finally, the established vibration fault diagnosis rules are validated in the practical fault searching. It has been proved that the established vibration fault diagnosis rules and fault confirmation form could quickly and accurately find the point of failure to ensure the security and stability of the unit, and then reduce the economic losses caused by troubleshooting inefficient. The established vibration fault diagnosis rules not only works on the waste heat turbine generators but also works on Power Plant Unit No.0. It shows that hierarchical classification diagnostic method is of application value on the vibration failure treatment in large and complex unitsThe purpose of this paper is to establish a set of fault diagnosis method through the vibration failure research of waste heat unit. It is suitable for field application and could provide reference for other units. It would improve the stability of the unit and make contribution to energy saving for enterprises.

Related Dissertations

  1. Study on Growth Monitoring Technique Based on Pixel Un-Mixing Method and HJ Remote Sensing Images in Paddy Rice,S511
  2. Explore a Hierarchical Classification of Management and Preparation of "Regulatory Plan",TU981-019
  3. Development and Experimental Study about Virtual Instruments of Vibration Test and Analysis System and Combustion Analyzer,TK407
  4. Urban rail transit passenger transfer station early warning and response method,U239.5
  5. A Study of Gene Name Normalization and Functional Prediction Based on Semantic Resource,TP391.1
  6. High-Resolution Image Classificationi Based on Urban Application,TP391.41
  7. Research on Fault Diagnosis Expert System of Hydroelectric Generating Set Vibration Based on Petri Network,TM312
  8. On Classification Management of University Academic Periodicals,G237.5
  9. Research on Herarchical Text Classification Technology,TP391.1
  10. The Research of Fault Management Mechanism for Computer Hardware Devices,TP307
  11. Research on Wetland Information Extraction and Analysis of Yellow River Delta Based on RS and GIS,X37
  12. Hierarchical Classification for Chinese Web Page Based on Improved SVM-KNN,TP391.1
  13. Network Resources Searching Study Based on Content’s Directory Tree,TP391.3
  14. Research on the Technology of Chinese Web Page Automatic Categorization Based on Structural Information,TP393.092
  15. Research on the Questions Classification in the Chinese Question Answering System,TP391.1
  16. The Research on Categorization of Chinese Web Page in Intelligent Search,TP393.092
  17. Application hierarchical classification bauxite mining technology control depleted loss test,TD862.5
  18. Study on Operator’s Classification of SP,F626
  19. A Study Employee Performance Evaluation System Based on ABC,F272.92
  20. POS Tagging System on Hierarchical Classification Labels,TP391.1
  21. The Research on Classification and Motivation of Knowledge Workers,F272.92

CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Turbine Generator
© 2012 www.DissertationTopic.Net  Mobile