A Case Study on the Premature Failure of a Cooling Water Pump Shaft

2008 ◽  
Vol 9 (1-2) ◽  
pp. 99-106
Author(s):  
H. Roy, ◽  
D. Ghosh, ◽  
A.C. Pankaj, ◽  
A.K. Shukla, ◽  
J. Basu,
Keyword(s):  
Cooling Water ◽  
Water Pump ◽  
Premature Failure ◽  
Pump Shaft

Failure of a Cooling Water Pump Shaft

2020 ◽  
Author(s):  
Pavankumar R. Sondar ◽  
J. K. Rakshan Kumar ◽  
Sanjay Chawla ◽  
Preetish C. Dsilva ◽  
Subray R. Hegde
Keyword(s):  
Cooling Water ◽  
Water Pump ◽  
Pump Shaft

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

scholarly journals Fracture analysis of a cooling water pump shaft

2018 ◽  
Vol 188 ◽  
pp. 04022
Author(s):  
Dimitris G. Papageorgiou ◽  
Kyriakos A. Kovsenoglou ◽  
Petros Bournelis ◽  
Carmen Medrea
Keyword(s):  
Cooling System ◽  
Material Selection ◽  
Cooling Water ◽  
304 Stainless Steel ◽  
Boundary Carbide ◽  
Water Pump ◽  
Finite Elements Analysis ◽  
Engine Cooling ◽  
Pump Shaft ◽  
Component Failures

Six shaft failures were encountered in a centrifugal water pump, part of the engine cooling system of a container ship. The last two failed pieces were received for analysis. A detailed study was carried out to determine the cause of the component failures. Historical data was collected, visual inspection was performed and a photographic file was created. The pieces were measured in order to record their general features and a 3-D model was generated. Hardness measurements were carried out. Microstructure was examined by means of light microscopy. A finite element simulation was conducted in order to determine the stress topology and to identify possible critical areas. Chemical analysis was carried out. The shafts were manufactured onboard, from AISI 304 stainless steel. The low hardness of both pieces indicates insufficient mechanical properties. Microstructural examination showed characteristic microstructure of coarse austenite. The presence annealing process derived twins and limited grain-boundary carbide precipitates were verified. The shafts failed due to torsional fatigue. Fracture initiated at the keyway on the propeller side as it was predicted from the finite elements analysis. Material selection material has and poor machining were found to be the main cause of failure. Appropriate recommendations were provided.

scholarly journals Case study on the effectiveness of condition monitoring techniques for fault diagnosis of pumps in thermal power plant

2019 ◽  
Vol 23 (1) ◽  
pp. 70-75 ◽  
Author(s):  
Caneon Kurien ◽  
Ajay Kumar Srivastava
Keyword(s):  
Power Plant ◽  
Condition Monitoring ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Cooling Water ◽  
Failure Detection ◽  
Feed Water ◽  
Water Pump ◽  
Monitoring Techniques

Abstract A case study was carried out to investigate the effectiveness of condition monitoring techniques in the early failure detection of pumps in a thermal power plant. Various condition monitoring techniques used in this case study involved vibration analysis, motor current signature analysis, noise monitoring and wear debris analysis. These techniques were applied on the three pumps, namely boiler feed water pump, auxiliary cooling water pump and condensate extraction pump, which have to work continuously for the operation of the thermal power plant. Vibration analysis of the auxiliary cooling water pump showed that there is a rising trend in the acceleration values at its driving and non-driving end indicating the deterioration of bearings. Motor current index range of all the pumps was found to be within acceptable limits. Wear debris analysis of lubricant in the hydraulic coupling of boiler feed water pump indicated the presence of sand, dirt and low alloy steel sliding wear particles in it. Condition monitoring techniques have been proved to be an effective technique in early failure detection of pumps.

МODERNIZATION TECHNOLOGY REPAIRING ACENTRIFUGAL WATER PUMP

2018 ◽  
pp. 48-51
Author(s):  
Sh.U. Yuldashev ◽  
D.T. Abdumuminova
Keyword(s):  
Production Process ◽  
Technological Process ◽  
Energy Efficient ◽  
Technical Support ◽  
Ultrasonic Processing ◽  
Water Pump ◽  
The Real ◽  
Technological Processes ◽  
Efficient Management ◽  
Pump Shaft

The article provides an overview of the principle of the pump D630-90, as well as methods for studying the real conditions of technical support to improve maintainability and optimize technological processes and systems. A technological process for the restoration of the shaft of a centrifugal water pump has been developed and an algorithm for managing it has been proposed, on the basis of which the system for energy-efficient management of the recovery area has been implemented. Also in the article some questions of use, metal-filled compound SK812, and also application of ultrasonic processing of a surface of a shaft of the centrifugal water pump of mark D630-90 are mentioned and considered. The developed technological process of pump shaft restoration showed that it is characterized by simplicity, it fits well into the production process of repair and can be widely used in repair shops.

Solar-driven water pump with organic Rankine cycle for pressurized irrigation systems: a case study

2021 ◽  
pp. 100960
Author(s):  
K. Shahverdi ◽  
Evangelos Bellos ◽  
Reyhaneh Loni ◽  
G. Najafi ◽  
Z. Said
Keyword(s):  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Water Pump ◽  
Irrigation Systems ◽  
Pressurized Irrigation

Effective Fuel Consumption by Improving Cooling Water Flow Rate in IC Engine

2015 ◽  
Vol 812 ◽  
pp. 112-117
Author(s):  
K.M. Kumar ◽  
P. Venkateswaran ◽  
P. Suresh
Keyword(s):  
Flow Rate ◽  
Cooling System ◽  
Water Flow Rate ◽  
Research Work ◽  
Cooling Water ◽  
Major Change ◽  
Clear Understanding ◽  
Water Pump ◽  
Ic Engine ◽  
Cooling Water Flow Rate

The coolant (water) pump assumes an important role of cooling system in IC engines. With upgrading of the engine power by turbocharging and turbo inter cooling, the water pump capacity needs to be increased corresponding to the power. This capacity enhancement has to be achieved without calling for a major change in the existing water pump, envelop and related fitment details. This requires a clear understanding of centrifugal pump for its performance parameter. One such engine is upgraded by turbocharging from 195PS to 240PS @2200 rpm. Improving water pump flow by changing the impeller dimensions, impeller casing, increase the suction, delivery pipe diameter had been done. Validation of the water pump in its actual engine installation was taken up as a part of the research work. Flow rate comparison of the new pump with the existing pump was made and the results were analyzed. The new water pump gives better flow rates for the engine speeds up to1800 rpm, beyond which the flow rate is slightly lesser than the existing pump.

scholarly journals Failure Analysis of Shaft Circulating Water Pump (CWP) used in Power Plant

2018 ◽  
Vol 159 ◽  
pp. 02027 ◽  
Author(s):  
Abdul Hamid ◽  
Sri Nugroho ◽  
Gunawan Dwi Haryadi ◽  
Khaeroman
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Power Plant ◽  
Failure Analysis ◽  
Fatigue Cracking ◽  
Hardness Test ◽  
Water Pump ◽  
Circulating Water ◽  
Pump Shaft ◽  
Sem Test

Pump shafts are generally exposed to the liquid being pumped either on a continual basis or at certain locations along the length of the shaft. The shaft material is austenitic stainless steel, description ASTM AU 79 TY 316. The purpose of this study is to determine the failure of the water pump shaft used in the power plant. Metallography is the study of structure metal shaft can used as a means for CWP metal pelleting (Circulating Water Pump), for the purpose of damaged or deeply degraded areas. SEM test is used to know the beginning of the crack (crack initiation). EDS test is used to chemical composition and Vikers hardness test is also used to know the hardness material. These three tests to support in analyzing the failure of the pump shaft. The conclusion of this failure analysis is the shaft material has porosity. Fatigue cracking comes from the outer surface area.

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