Fractographic Analysis of the Primary Oil Pump Shaft Fracture from a Steam Turbine

2008 ◽  
pp. 328-328-18
Author(s):  
VP Swaminathan
Keyword(s):  
Steam Turbine ◽  
Shaft Fracture ◽  
Fractographic Analysis ◽  
Oil Pump ◽  
Pump Shaft

scholarly journals ANALISIS KERUSAKAN DAN PERBAIKAN OIL PUMP STEAM TURBINE 32-K-101-P1-T DALAM PLATFORMING UNIT-NAPHTA PROCESSING UNIT (NPU)

ROTASI ◽  
2016 ◽  
Vol 18 (2) ◽  
pp. 44
Author(s):  
Norman Iskandar ◽  
Ardha Ridho Pangeran
Keyword(s):  
Steam Turbine ◽  
Ball Bearing ◽  
Low Pressure ◽  
Processing Unit ◽  
Medium Pressure ◽  
Oil Pump ◽  
Carbon Ring ◽  
Pressure Steam ◽  
Split Face

Oil pump steam turbine (OPST) adalah sebuah turbin uap jenis impuls yang digerakan oleh medium pressure steam (MPS) dengan tekanan 15–21 kg/cm2G dan temperatur kerja 250–370 oC. Uap ekstrasi dari turbin uap adalah low pressure steam (LPS) dengan tekanan 3.8–6.3 kg/ cm2G. Dalam proses perawatannya, OPST diinspeksi setiap 2 minggu sekali dengan melihat kondisi oli, trending getaran, dan putaran poros turbin. Pada saat operasi OPST mengalami kenaikan vibrasi yang melebihi batas toleransi (vs 2.82 mm/s) dan keruhnya oli pelumasan OPST. Dalam hal ini dilakukan sebuah penelitian guna mengetahui indikasi kerusakan OPST dan analisis perbaikan yang tepat guna mengembalikan performa dari OPST. Dalam mengidentifikasi kerusakan tersebut metode yang dilakukan adalah analisis trending spektrum menggunakan software omnitrend yang nilainya akan dibandingkan dengan hasil perhitungan bearing. Analisis tersebut menghasilkan bahwa terjadi vibrasi 1X RPM dikarenakan kerusakan pada ball bearing yang diakibatkan oleh pelumas bearing yang sudah keruh karena tercampur air. Untuk mengetahui masuknya air ke dalam oil chamber dilakukan dua cara yaitu percobaan hydrotest dan pengukuran clearances carbon ring seals. Setelah dilakukan dua percobaan tersebut didapatkan hasil penyebab masuknya air ke oil chamber karena overclearances pada carbon ring seals (vs 0.120-0.145 mm). Masalah yang terjadi ini mengakibatkan uap masuk ke penampungan oli sehingga pelumasan pada bearing tidak berjalan dengan baik sehingga terjadi kerusakan pada bearing. Setelah teridentifikasi kerusakannya, dilakukan pergantian komponen bearing inboard dan bearing outboard serta laping split face pada carbon ring seals. Setelah mengalami perbaikan vibrasi pada OPST kembali normal dari 3.72 mm/s menjadi 0.93 mm/s.

Forming Technology and Microstructure Distribution of Automobile Oil Pump Shaft by Extruded Cross Wedge Rolling

2019 ◽  
Author(s):  
Xue-Dao Shu ◽  
Tai-Zhu Chen ◽  
Ying Chang ◽  
Ying Zhu ◽  
Wen-Wei Gong
Keyword(s):  
Grain Size ◽  
Fem Simulation ◽  
Grain Structure ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Oil Pump ◽  
Average Grain Size ◽  
Pump Shaft ◽  
Utilization Ratio ◽  
Material Utilization

Abstract In order to improve the material utilization ratio of automobile oil pump shaft, the extrusion wedge cross rolling process was developed to form automobile oil pump shaft, the results show that the volume of the blank head produced by extrusion cross wedge rolling is reduced by about 75% compared with that produced by traditional cross wedge rolling, and the material utilization ratio can be increased to about 95%. The microstructure distribution of automobile oil pump shaft formed by this process was studied systematically by fem simulation and experiment, get the forming process can make the grain size of oil pump shaft rolling parts refine continuously, and finally obtain fine and uniform grain structure. The average grain size measured by the experiment is in good agreement with the simulation results. The research results lay a theoretical foundation for reducing oil pump cost and improving life.

The Research on Shaft Center Position of Ultra-Supercritical Steam-Turbine Generator

2013 ◽  
Vol 655-657 ◽  
pp. 137-143
Author(s):  
Zhan Hui Liu ◽  
He Jun Bao
Keyword(s):  
Steam Turbine ◽  
Working Conditions ◽  
Relative Position ◽  
Steam Flow ◽  
Turbine Generator ◽  
Flow Passage ◽  
Oil Film ◽  
Oil Pump ◽  
Center Position

The shaft center of steam-turbine generator, showing relative position of shaft and bearing bush, would changed when jacking oil pump or turning gear started, raising speed and loading carrying. The change of bear carrying, oil film rigidity and clearance variation in flow passage of steam-turbine generator could be deduced through measuring shaft center position and analyzing its variation to working conditions, which would be helpful for treating vibration malfunction cased by deficiency of oil film rigidity, steam flow exciting and rubbing.

scholarly journals Experimental research of oil pump for a compression-ignition aircraft engine

2019 ◽  
Vol 179 (4) ◽  
pp. 142-146
Author(s):  
Marcin SZLACHETKA ◽  
Rafał SOCHACZEWSKI ◽  
Michał GĘCA
Keyword(s):  
Diesel Engine ◽  
Flow Resistance ◽  
Volumetric Flow Rate ◽  
Aircraft Engine ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Oil Pump ◽  
Pump Output ◽  
Pump Shaft ◽  
Engine Components

The paper presents an analysis of the constructions of oil pumps for an aircraft compression ignition engine. It is a two-stroke liquid-cooled engine with a power of 100 kW. The system has 3 cylinders and 6 opposed pistons. The paper estimates the required oil pump capacity to make the engine components well-lubricated. Next, automotive oil pumps for diesel engines are analyzed to select a correct pump for aircraft diesel engine applications. Three pump constructions of different constructions and dimensions of a rotor were selected. A measurement bench was designed and built to test these oil pumps in the range of pump shaft speeds from 0 to 4500 rpm and volumetric flow rate up to 150 l/min. The bench also enables stabilization of oil temperature at the required level within the range from 30 to 120oC. In addition, flow resistance through engine slide bearings was simulated by changing the position of a throttling valve at the pump output to regulate pressure in the range of 0–700 kPa. The obtained capacity characteristics of individual pumps versus on oil pressure and temperature allowed us to find an appropriate oil pump to make individual engine nodes well-lubricated.

S Type Single-Stage Double Suction Centrifugal Pump in Vibration and Shaft Broken Analysis

2014 ◽  
Vol 685 ◽  
pp. 228-231
Author(s):  
Wei Liu ◽  
Feng Lan Wang
Keyword(s):  
Work Environment ◽  
Centrifugal Pump ◽  
Shaft Fracture ◽  
Comprehensive Analysis ◽  
Single Stage ◽  
Centrifugal Pumps ◽  
Pump Shaft

This article describes the reasons for vibration and off-axis S-type single-stage double-suction centrifugal pumps,due to the design of the pump itself and the reasons for which the work environment and the work of the pump caused by the vibration,thereby causing the shaft fracture, and other reasons, resulting in breakage of the pump shaft from a comprehensive analysis of the reason for the above problems.

scholarly journals Discussion and Analysis on Operation Reliability of DC Oil Pump in Thermal Power Unit

2021 ◽  
Vol 2095 (1) ◽  
pp. 012076
Author(s):  
Ruicai Si ◽  
Wenfei Hu ◽  
Songhan Wang ◽  
Zhongyan Wang ◽  
Xiwen Liu ◽  
...  
Keyword(s):  
Pump Power ◽  
Steam Turbine ◽  
Power Supply ◽  
Power Plants ◽  
Power Supply System ◽  
Thermal Power ◽  
Supply System ◽  
System Configuration ◽  
Oil Pump ◽  
Treatment Measures

Abstract In recent years, some power plants in China can’t start the DC oil pump normally in emergency due to the faults of DC oil pump power supply system and imperfect control circuit. It caused the turbine to cut off the oil and burn the Bush, which caused a serious accident. In view of the importance of DC oil pump, this paper analyzes the interlock logic, start stop permission, direct circuit and power system configuration of DC oil pump, put forward the treatment measures. It is of great significance to prevent the oil cut-off and Bush burning accident of steam turbine.

Failure Analysis of a Locomotive Engine Oil Pump Shaft

2013 ◽  
Vol 13 (4) ◽  
pp. 470-473
Author(s):  
A. R. Mashreghi ◽  
S. Saberifar ◽  
S. J. Hejazi
Keyword(s):  
Failure Analysis ◽  
Engine Oil ◽  
Oil Pump ◽  
Locomotive Engine ◽  
Pump Shaft
Sign in / Sign up

Export Citation Format

Share Document