scholarly journals X-Ray diffraction Apparatus for Life Assessment of Boiler Feed Water Pump Shaft.

1993 ◽  
Vol 42 (477) ◽  
pp. 634-640
Author(s):  
Makoto HAYASHI ◽  
Yoshiharu UEYAMA ◽  
Yoshiyuki HASHIMOTO ◽  
Katsuhiko OGISO ◽  
Katsunari SASAKI
Keyword(s):  
Life Assessment ◽  
Feed Water ◽  
Water Pump ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pump Shaft ◽  
Boiler Feed Water

Assessment of Fatigue Life for High-Temperature Pipeline Welds Using X-Ray Diffraction Technique

2007 ◽  
Vol 353-358 ◽  
pp. 130-133
Author(s):  
Keun Bong Yoo ◽  
Jae Hoon Kim
Keyword(s):  
High Temperature ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Power Plants ◽  
Low Cycle Fatigue ◽  
Diffraction Method ◽  
Life Assessment ◽  
Fatigue Properties ◽  
X Ray Diffraction ◽  
X Ray

The objective of this study is to examine the feasibility of the X-ray diffraction method for the fatigue life assessment of high-temperature steel pipes used for main steam pipelines, re-heater pipelines and headers etc. in power plants. In this study, X-ray diffraction tests were performed on the specimens simulated for low cycle fatigue damage, in order to estimate fatigue properties at the various stages of fatigue life. As a result of X-ray diffraction tests, it was confirmed that the full width at the half maximum (FWHM) decreased with an increase in the fatigue life ratio, and that the FWHM and the residual stress due to fatigue damage were algebraically linearly related to the fatigue life ratio. From this relationship, a direct assessment of the remaining fatigue life was feasible.

Case study of failed feed water pump shaft in HRSG of 9F gas turbine generator unit

2020 ◽  
Vol 118 ◽  
pp. 104861
Author(s):  
Shuchao Gu ◽  
Minghua Zhao ◽  
Guoping Qiu ◽  
Ruixuan Wang ◽  
Yuzhe Liu ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Feed Water ◽  
Water Pump ◽  
Turbine Generator ◽  
Pump Shaft ◽  
Generator Unit

Assessment of Fatigue Life for High-Temperature Pipeline Welds by Non-Destructive Method

2006 ◽  
Vol 326-328 ◽  
pp. 497-500
Author(s):  
Keun Bong Yoo ◽  
Hyun Sun Choi ◽  
Eui Hyun Kim ◽  
Sun Young Cho ◽  
Jae Hoon Kim
Keyword(s):  
High Temperature ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Maximum Intensity ◽  
Life Assessment ◽  
Full Width ◽  
Half Maximum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Half Maximum Intensity

The objective of this study is to estimate the feasibility of X-ray diffraction method application for fatigue life assessment of the high-temperature pipeline steel such as main steam pipe, re-heater pipe and header etc. in power plant. In this study, X-ray diffraction tests using various types of specimen simulated low cycle fatigue damage were performed in order to analyze fatigue properties when fatigue damage conditions become various stages such as 1/4, 1/2 and 3/4 of fatigue life, respectively. As a result of X-ray diffraction tests for specimens simulated fatigue damages, we conformed that the variation of the full width at half maximum intensity decreased in proportion to the increase of fatigue life ratio. And also, the ratio of the full width at half maximum intensity due to fatigue damage has linear relationship with fatigue life ratio algebraically. From this relationship, it was suggested that direct expectation of the life consumption rate was feasible.

scholarly journals STUDI DINAMIKA ROTOR POMPA PENGISI AIR KETEL (BFWP) 6 TINGKAT MENGGUNAKAN PERANGKAT LUNAK

2017 ◽  
Vol 8 (1) ◽  
pp. 209-218
Author(s):  
Fatkur Rachmanu
Keyword(s):  
Critical Speed ◽  
Feed Water ◽  
Water Pump ◽  
Hydrodynamic Bearing ◽  
Unbalance Response ◽  
Boiler Feed Water

Pompa multi tingkat untuk mengatasi kebutuhan fluida cair agar dapat mengalirkan ke tempat yang elevasinya sangat tinggi atau sangat jauh atau mempunyai perbedaan tekanan terhadap sisi masuk dan keluar pompa yang sangat tinggi. Pompa multi tingkat digunakan sebagai pompa pengisi air ketel (Boiler Feed Water Pump) dengan 6 buah/tingkat baling-baling (impeller) dan di hubungkan dengan kopling menggunakan penggerak mula turbin uap yang mempunyai variasi kecepatan 4000 rpm   hingga 6000 rpm. Dengan daya input pompa sebesar 831.050 Watt. Torsi putar untuk putaran 6000 Rpm adalah1323,33 Nm. Ditopang hydrodynamic bearing di kedua ujung poros. Pada penelitian ini diamati frekuensi pribadi pada poros rotor, menentukan modeshape poros rotor (Critical speed map ), respon takseimbang(Unbalance response) pada bearing station. Menggunakan Software-X berupa perhitungan perangkat lunak dinamika rotor dibandingkan dengan software Solidworksmenggunakan metode elemen hingga. Studi dinamika rotor mempunyai kecepatan kritis sebesar 2750 CPM dengan kekakuan bearing 1x106 lbf/inchi pada mode 1. Pada mode no.7 akan terjadi simpangan amplitudo yang besar.

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