패턴 분석을 통한 왕복동식 펌프의 진단 연구
Study on the Diagnosis of a Reciprocating Pump Using Pattern Analysis
- 주제(키워드) 패턴 분석 , 왕복동식 펌프 , 진단 연구
- 발행기관 아주대학교
- 지도교수 채장범
- 발행년도 2015
- 학위수여년월 2015. 8
- 학위명 석사
- 학과 및 전공 일반대학원 기계공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000020464
- 본문언어 한국어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
본 논문의 연구 목적은 왕복동식 펌프 헤드의 진동 신호로 펌프 내부 상태를 진단하는 것이다. 특히 본 연구는 펌프가 정상 상태와 결함 상태일 경우에 흡입/토출 밸브가 닫히는 타이밍의 변화를 파악하는데 중점을 두어 진행하였다. 실제 원자력 발전소 산업 현장과 유사한 환경을 제공할 수 있는 유동장을 실험실 내 설치 및 제작하였다. 펌프 후단에 설치된 제어 밸브를 조절하여 100 bar에서 펌프 헤드의 진동 신호와 실린더 내부 압력 신호를 측정하여 두 신호 간 관계를 살펴보았다. 실린더 압력 신호를 통해 알 수 있는 밸브가 닫히는 타이밍과 거의 비슷한 타이밍에 진동 신호가 발생함을 확인할 수 있었다. 펌프 결함 진단을 위해 시스템의 동적 기기인 밸브와 피스톤에서 발생할 수 있는 결함을 인위적으로 가해주어 진동 신호의 변화를 살펴보았다. 정상과 결함 상태에서의 신호 특징을 패턴으로 형성하였다. 패턴 매칭 방법을 통하여 패턴 인식 과정을 수행하였고 진동 신호만으로 결함 위치와 종류를 판별할 수 있는 펌프 진단 알고리즘을 구현하였다. 본 연구에서 구현된 진단 알고리즘을 통해 현장에서 진동 신호만으로 펌프 내부 상태 정보를 제공하여 미리 해당 부품을 교체함으로써 결함 심화로 인한 불시 정지를 예방할 수 있다.
more초록/요약
The object of this paper is to diagnose the state of the reciprocating pump by analyze vibration signal. In particular, this study was performed to identify a change about the suction, discharge valve close timing at the normal, defect condition. Experimental flow loop is designed to provide an environment similar to actual nuclear power plant. When controlling valve to make 100 bar in flow loop is performed , vibration and cylinder pressure signal is measured and analyzed about relationship between the two signals. At the result of flow loop experiment it was confirmed to know valve close timing by analyze vibration and cylinder pressure signals. The pump was operated under the various conditions and the defects were introduced on pump to examine their effects on the signal. Normal and defected signatures were gathered and analyzed to develop the patterns of defects. A pattern matching is implemented in a pump diagnosis algorithm using vibration to determine signal the location and type of defect. Diagnosis algorithm implemented in this study by providing the vibration signal at pump head is able to know pump internal state and to prevent a sudden stop by replacing the parts in advance in nuclear power plant.
more목차
- 제목 차례 -
제 1 장 서론 ··············································································1
제 1 절 연구 배경 및 목적 ························································1
제 2 절 연구 동향 ····································································2
제 2 장 유동장 실험 ····································································4
제 1 절 유동장 실험 장치 구성 ··················································4
제 2 절 유동장 시험 영역 ·························································9
제 3 절 데이터 수집 위한 센서 설치 ·········································10
제 4 절 정상 상태 실험 ···························································20
제 5 절 정상 상태 신호 분석 ···················································20
제 6 절 결함 실험 ··································································26
제 7 절 결함 상태 신호 분석 ···················································28
제 3 장 결함 판별 방법 개발 ······················································32
제 1 절 실린더 압력 신호와 진동 신호의 상관성 ························32
제 2 절 결함별 패턴 형성 ························································37
제 3 절 패턴 분석을 통한 진단 ················································40
제 4 장 결론 ············································································45
참고 문헌 ·················································································47
Abstract ··················································································49
