Relevant bibliographies by topics / Centrifugal vertical pumps

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Centrifugal vertical pumps'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Centrifugal vertical pumps"

1

Thiruchelvam, Vinesh, and Lim Min Hong. "Fluids vertical transfer utilizing VFD based centrifugal pumps." Journal of Physics: Conference Series 822 (April 11, 2017): 012062. http://dx.doi.org/10.1088/1742-6596/822/1/012062.

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2

Birajdar, Ravindra, and Appasaheb Keste. "Prediction of flow induced vibrations in vertical turbine pumps using one-way fluid-structure interaction." MATEC Web of Conferences 211 (2018): 16002. http://dx.doi.org/10.1051/matecconf/201821116002.

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Centrifugal pumps/vertical turbine pumps are important and critical equipment for operation in the power generation, water supply, process industries and petrochemical industries. All centrifugal and vertical turbine pumps have rotors and structures that can vibrate in response to excitation forces. Mechanical and hydraulic unbalance are the two major factors which can create dynamic effects in terms of pump vibrations. In many cases the resulting hydraulic forces due to hydraulic unbalance has much the same effect as the mechanical unbalance. The vibrations in the pumps must be within acceptable limits of applicable standards. If there is higher level of vibrations, it not only leads to operational inefficiencies but also causes pump failures. Hence, it is very important for designers to understand the dominating fact of unbalance force and its origin. The prediction of vibrations in a vertical turbine pump due to the hydro dynamic forces, using numerical methods can help a designer to accomplish a successful design. The interaction between solid and fluid in present case can be completed by one-way coupling method. The one-way fluid-structure interaction approach is presented in present paper to predict the vibrations at specific operating condition which has good correlation with the test data. The advantage of reduced computational effort in this approach can be utilized during initial design stage. In this paper, a case study of one-way FSI approach of a vertical turbine pump is discussed. After detailed explanation about the CFD results, one-way coupling approach is explained with comparison of vibration displacements in both numerical and test data.
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Avers, Fredric H. "Minimizing Vibration in Vertical Non-Clog Wastewater Centrifugal Pumps." Proceedings of the Water Environment Federation 2009, no. 16 (2009): 1440–59. http://dx.doi.org/10.2175/193864709793956185.

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4

Gao, Bo, Min Guan Yang, Xin Kai Sun, and Ning Zhang. "Structural and Hydraulic Design of Mechanical Pump Using in LBE Test Loop." Advanced Materials Research 588-589 (November 2012): 190–93. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.190.

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In order to design a mechanical pump that can satisfy the special requirements of the LBE test loop, structural and hydraulic design ideas were discussed in this paper. A new vertical centrifugal submerged pump was proposed, including installation and hydraulic model. Based on the provided parameter, hydraulic design of the pump has been done by CFD method. Velocity caused erosion problem was considered primarily in the design process. It is helpful for the future design of pumps in various loops and ADS.
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5

Hajar, Ibnu. "Pengaruh tipe bantalan bola pada poros pompa sentrifugal terhadap sinyal getaran." Jurnal POLIMESIN 16, no. 1 (2018): 25. http://dx.doi.org/10.30811/jpl.v16i1.552.

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Pompa sentrifugal merupakan salah satu pompa yang sangat banyak digunakan pada industri pengolahan, seperti industri pengolahan air minum, industri pengolahan minyak, dan pabrik kelapa sawit. Bentuknya sederhana dan biaya perawatan lebih murah. Permasalahan yang sering terjadi pada pompa sentrifugal adalah kerusakan pada bantalan poros yang diakibatkan oleh getaran, keausan, dan misalignment. Pada makalah ini membahas pengaruh tipe bantalan bola terhadap sinyal getaran poros pompa sentrifugal satu tingkat. Tujuan penelitian ini adalah mengetahui dan mendapatkan pengaruh tipe bantalan bola pada poros pompa sentrifugal dengan mengukur sinyal getaran. Pompa yang digunakan dalam penelitian ini adalah pompa sentrifugal yang mempunyai head tekanan 9 meter, debit aliran 3 liter/detik dan daya output 746 watt. Metode penelitian dengan mengamati dan analisis perilaku sinyal getaran yang terdiri dari simpangan (displacement), kecepatan( velocity) dan percepatan (acceleration) pada bantalan bola pompa sentrifugal pada titik P-01 dan P-02 dari arah aksial, vertikal dan horizontal. Pengukuran sinyal getaran dilakukan dengan menggunakan alat ukur Vibrometer Analog VM-3314A. Bantalan (bearing) yang gunakan dalam penelitian ini adalah tipe cylindrical roller bearing dan roller ball bearing yang dipasang pada poros pompa sentrifugal untuk diamati dan ukur sinyal getarannya. Hasil pengujian menunjukkan bahwa harga simpangan tertinggi 37,125 µm terjadi bantalan tipe ball bearing arah horizontal pada titik pengukuran P-02 tinggi tekan 3 meter dengan debit aliran 2,8 liter/detik. Sedangkan harga simpangan terendah 27,1 µm terjadi pada cylindrical roller bearing dengan tinggi tekan 3 meter dan debit aliran 2,8 liter/detik. Dengan naiknya tinggi tekan pada pompa sentrifugal menyebabkan turunnya getaran pompa sesuai penurunan beban pada pompa, sehingga untuk pompa sentrifugal satu tingkat lebih aman menggunakan tipe cylindrical roller bearing.Kata kunci: Tipe bantalan, pompa sentrifugal, sinyal getaranAbstractCentrifugal pumps are one of the most widely used pumps in the processing industry, such as the drinking water treatment industry, the oil processing industry and the palm oil mill, in addition to the simpler and cheaper maintenance costs. The most common problem with centrifugal pumps is damage to the shaft bearings caused by vibration, wear and misalignment. This paper discusses the effect of ball bearing type on the single-stage centrifugal pump vibration signal. The purpose of this research is to know and get the influence of ball bearing type on centrifugal pump shaft by measuring vibration signal. The pumps used in this study are centrifugal pumps that have a 9-meter pressure head, a flow rate of 3 liters / second and a power output of 746 watts. Research method by observing and analyzing vibration signal behavior consist of displacement, velocity and acceleration on centrifugal pump ball bearing at point P-01 and P-02 from axial, vertical and horizontal direction. Measurement of vibration signal is done by using Analog Vibrometer VM-3314A. Bearings used in this study are cylindrical roller bearing and roller ball bearings mounted on the centrifugal pump shaft to be observed and measure the vibration signal. Test results showed that the highest deviation 37,125 μm occurred bearing type ball bearing horizontal direction at the point of measurement P-02 high press 3 meter with flow debit 2,8 liter / second. While the lowest 27.1 μm deviation occurred in cylindrical roller bearing with 3 meter press and 2.8 liter / second flow rate. With the increase in the height of the tap on the centrifugal pump causes the decrease of pump vibration according to the load decrease at the pump, so for the centrifugal pump one level safer using cylindrical roller bearing type
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V. S., Shagapov, Borodin S. L., Gubaidullin A. A., Duong Ngoc Hai, and Musakaev N. G. "The theoretical research of an upward two-phase flow with phase's changes in a vertical well." Vietnam Journal of Mechanics 32, no. 4 (2010): 211–21. http://dx.doi.org/10.15625/0866-7136/32/4/290.

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By methods of mechanics of multiphase systems the mathematical model describing an upward gas-and-oil flow in a vertical well is constructed. The model considers phase's changes, deposition of oil paraffin on the elevating column's walls of the well, influence of an installation of electrical centrifugal pumps on parameters of the gas-and-oil flow, and also heat exchange of the well with surrounding rock. It is shown, that at the using of an installation of electrical centrifugal pumps and variation of its metering characteristic, depth of its setting, it is possible to achieve the optimum temperature mode on all the well's height and to prevent by it formation of paraffin deposits.
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Luo, Yin, Wenqi Zhang, Yakun Fan, Yuejiang Han, Weimin Li, and Emmanuel Acheaw. "Analysis of Vibration Characteristics of Centrifugal Pump Mechanical Seal under Wear and Damage Degree." Shock and Vibration 2021 (April 8, 2021): 1–9. http://dx.doi.org/10.1155/2021/6670741.

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Mechanical seal is a kind of shaft sealing equipment. Face wear is one of the main causes of mechanical seal failure. Mechanical seal condition is also related to the reduction of energy consumption and carbon emission. Therefore, we need to detect the centrifugal pump seal condition. At present, vibration signal is a common method for fault monitoring and diagnosis of centrifugal pump. In this paper, the vibration signal under the condition of damaged centrifugal pump seal is measured by studying the characteristics of vibration signal after the end face damage of centrifugal pump. Statistical indicators such as RMS and kurtosis were taken to analyze the average energy and shock wave energy of vibration signal. The time-frequency characteristics of vibration signal are analyzed by frequency spectrum. The results show that there are a large extent variation of vibration amplitude in the direction of base and axis and a weak variation of vibration amplitude in the direction of radial and vertical. With the increasing of flow rate, the RMS of vibration signal falls at first, then keeps steady, and mounts at last when the flow rate is over the design flow rate. It can be shown from the time-frequency spectrum that there is a shock wave and pause signals caused by the shock wave, which are reflected by the higher frequency band components of the vibration signal that can provide a reference to the diagnosis of the occurrence of damaged mechanical seal. From the analysis, the energy of vibration signal is related to the running condition, we can find that the occurrence of mechanical seal wear makes the centrifugal pump to produce high-frequency vibration signal, and the axial vibration is the strongest and the instability in the fluid makes the vibration signal produce high amplitude characteristics. Analyzing the vibration signal characteristics of centrifugal pumps with damaged mechanical seal is of great significance to find the mechanical seal failure of the centrifugal pumps and adjust the operating parameters.
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Qiu, Guangqi, Si Huang, and Yingkui Gu. "Experimental investigation and multi-conditions identification method of centrifugal pump using Fisher discriminant ratio and support vector machine." Advances in Mechanical Engineering 11, no. 9 (2019): 168781401987804. http://dx.doi.org/10.1177/1687814019878041.

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For identifying the operation situations of centrifugal pumps by artificial intelligence, we performed an experiment on multi-flow conditions. The multi-flow conditions were simulated by adjusting an automatic flow-regulating valve installed on outlet pipe, and the vertical vibration signals of 20 flow points at the bearing house were collected by the test system. By time-domain analysis, frequency-domain analysis, information entropy, empirical modal decomposition, and wavelet packet decomposition methods, a comprehensive feature space was constructed. In addition, the optimal features were selected by Fisher discriminant ratio, and the dimensionality of the selected optimal features was reduced with principal component analysis. Finally, support vector machine algorithm was employed to identify the real-time flow condition, and the hyper-parameters of support vector machine classifier model were optimized by a grid search technique. Results show that the vibration test can effectively simulate the operation situation of centrifugal pumps under multi-flow conditions, and the proposed multi-flow conditions identification method has achieved a good identification performance.
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Chervov, Vladimir. "APPLICATION FIELD EXTENSION OF PNEUMATIC HUMMERS WITH VARIABLE STRUCTURE OF PERCUSSION POWE." Interexpo GEO-Siberia 2, no. 5 (2019): 103–11. http://dx.doi.org/10.33764/2618-981x-2019-2-5-103-111.

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In the work short review of equipment applied for driving of underground utility lines and for hammering of vertical steel elements into soil is carried out. Construction and operating principle of pneumatic hammer with elastic circle and inertial valves for hammering of pipes with various diameter are described. Huge longitudinal forces generated during percussion provide rock destruction or soil compaction in the area of hole boring. The forces can be used for realization of other technological processes, for example, for repairing of oil hole electric-centrifugal pumps which require full disassemble. Application of the pneumatic hummer with mass of percussion part 40 kg has been probed for extraction many components (working wheels and guide vanes) from pipe barrel. Other example of percussion device application is intensification of unloading process of bulk materials from railway cars using vibro-percussion setup with drive from pneumodrift, change of which to analogous in size and working parameters allows to get high efficiency of the technological process.
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Li, He, Shi Bo Fu, Qing Rong Zhao, and Bang Chun Wen. "Seismic Response Spectrum Analysis of the Single Vertical Centrifugal Pump." Applied Mechanics and Materials 121-126 (October 2011): 1450–54. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1450.

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A dynamic model of the single vertical centrifugal pump was established to avoid seismic disadvantageous direction towards the direction of continually occurring earthquake during the designing and the installing. Finite element method was used to analyse the single vertical centrifugal pump and educe the first 20 natural frequencies and vibration shapes. Response spectrum method was adopted to do earthquake analysis. Response spectrum was inputted from different directions for getting different displacements and loads. According to the results, model’s direction of 45°~75° should be located at the direction of continually occurring earthquake to avoid the maximum vibration.
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Dissertations / Theses on the topic "Centrifugal vertical pumps"

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Loeser, Sérgio. "Metodologia de projeto estrutural de bombas centrífugas verticais de poço úmido." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/85/85133/tde-25082011-110944/.

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O projeto de bombas centrífugas verticais de poço úmido tem forte dependência do arranjo de cada planta. Cada situação torna-se assim um projeto particular e exige uma mútua cooperação entre os fabricantes do equipamento, responsáveis pelo projeto e testes das bombas, e os proprietários e montadores das plantas, responsáveis pela montagem e instalações das bombas verticais e respectivas tubulações no campo. Após uma ampla pesquisa bibliográfica, evidenciou-se a ausência de uma metodologia de projeto estrutural que contemple de forma integrada o projeto estrutural de todas as partes envolvidas, isto é, as bombas, as estruturas e os edifícios onde elas são instaladas. Para o desenvolvimento da dissertação, as bombas verticais foram divididas em três partes: corpo de sucção, coluna e corpo superior. Foram analisados três casos de estudo por meio de modelagem por elementos finitos. Ficou evidenciada a necessidade de uma metodologia de projeto estrutural, baseada na identificação dos problemas e das suas causas e de alternativas estruturais mais adequadas para eliminá-los ou reduzi-los. Considerando a dificuldade de testar estas bombas numa bancada de testes do fabricante, montadas de modo similar ao que trabalharão no campo e o fato de que resolver problemas destas bombas no campo é muito difícil e em certos casos até mesmo impossível, ficou evidenciado que a metodologia de projeto estrutural proposta constitui um conjunto de recomendações de grande importância nas aplicações de bombas centrífugas verticais de poço úmido. O desenvolvimento foi feito de modo geral, mas esta metodologia pode e deve ser utilizada em centrais nucleares de potência.<br>In the structural design of wet sump vertical centrifugal pumps, there is a strong dependence on the arrangement of each plant. Therefore, for each plant there is a particular design that requires mutual cooperation between equipment manufacturers, responsible for the design and testing of the pumps, and the plants and facilities owners and builders involved in the installation of vertical pumps and connected pipes in field. After an extensive literature search, it has been concluded that there was a lack of a structural design methodology that addresses in an integrated structural design of all parts involved, ie, pumps, structures and buildings where they are installed. To develop the dissertation, vertical pumps were divided into three parts: the suction body, column and discharge body. Three study cases were analyzed using finite element modeling. It has been clear out it is necessary a structural design methodology based on identification of problems and their causes and structural alternatives more appropriate to eliminate or reduce them. Considering the difficulty of testing these pumps in the factory test bed, assembled similarly to that in field, and the fact that to solve problems on the field is very difficult and, in some cases, even impossible, it became evident that the structural design methodology proposed is a set of recommendations of great importance in applications of wet sump vertical centrifugal pumps. The development was done in general, but this methodology can and should be used in nuclear power plants.
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Siqueira, Cristiano Roque. "Estudo de vibração aplicado em bombas verticais centrífugas." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263788.

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Orientador: Milton Dias Junior<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-20T04:13:23Z (GMT). No. of bitstreams: 1 Siqueira_CristianoRoque_M.pdf: 6928797 bytes, checksum: ac276f05e511e74f07cdcb3e64193c84 (MD5) Previous issue date: 2012<br>Resumo: Neste trabalho procurou-se avaliar o comportamento vibracional de uma bomba vertical centrífuga durante operação em campo, ou seja, nas instalações do cliente, e comparar os dados obtidos em relação ao critério de aceitação utilizado pelo fabricante através de normas vigentes. Para isto, foi necessário conhecer como é realizado o ensaio de desempenho da bomba, quais os pontos de medições determinados pelas normas, para uma melhor análise foram necessários incluir novos pontos em estudo nesta dissertação. Utilizou-se a análise de vibração em tempo, freqüência, deslocamento e velocidade. Os resultados obtidos através dos ensaios foram processados através da técnica de processamento de sinais, que melhor se adapta a análise investigada. Foram ensaiados, analisados e comentados os resultados experimentais deste trabalho. É da maior importância o estudo na formação de um critério de aceitação amplo da análise de vibração aplicado as bombas verticais centrífugas<br>Abstract: In this study sought to evaluate the vibrational behavior of a vertical centrifugal pump during operation in the field, that is, the customer premises, and compare the data obtained regarding the acceptance criteria used by the manufacturer using standards norms. For this, it was necessary to know how the test is performed pump performance, which points determined by measurement standards norms, for a better analysis was necessary to include new points studied in this dissertation.We used the analysis of vibration time, frequency, displacement and velocity. The results obtained from the tests were processed through the signal processing technique that best fits the analysis investigated. Were tested, analyzed and commented on the results of this experimental work. It is of utmost importance to study the formation of a broad acceptance criterion of vibration analysis applied vertical centrifugal pumps<br>Mestrado<br>Mecanica dos Sólidos e Projeto Mecanico<br>Mestre em Engenharia Mecânica
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LOESER, SERGIO. "Metodologia de projeto estrutural de bombas centrífugas verticais de poço úmido." reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10013.

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Made available in DSpace on 2014-10-09T12:33:48Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:03:59Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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Huang, Chi-Jun, and 黃啟俊. "Flow Field Analysis and Research of Centrifugal (Vertical Axis) Pumps." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/mccz7r.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所在職專班<br>100<br>Due to liquid gravity features that has to use a pump to transmits. The vertical axis sewage pumps (Vertical Wet Pit Pump) is a kind of rotating machinery which were common used for liquid distribution via pipes systems in generated Industry. The liquid types and process applications in which there are many options of the pump types can be selection. To consider application conditions that there is an only optimum pump specification suitably. Firstly, to carry out the numerical modal analysis using finite element software for the impeller, to obtain the modal parameters, re-use of the Cosmos FloWorks software different entrance diameter of numerical analysis for the pump , to obtain the velocity and pressure for the pump flow field and its performance , and then get a better design. Results show that by the Cosmos FloWorks software can find that the pressure in the entrance pipe is more greater after modify pipe diameter. Better the efficiency of its outlet flow. It was also found that the flow speed do not affect flow field and performance of the pump. Then, changes in experimental parameters can be divided into two. Column truncated 580mm away from the bottom. Sham pump filter lengthened 150mm. Improve the filter area and on the bottom support to strengthen, reducing the filter blocking abnormal. Before improvement and after improvement the measure vibration / temperature for the pump bearings , because of bearing is the heat source , and the axis of deflection by a big margin , therefore , for here make those measurements. The results showed that the improved vibration value of approximately is reduce 1.2mm/s, Temperature can be reduced to 30℃ was also found after the improvement. Through the establishment of the simulation and the experimental procedure, those can be refer to the pump in the design, manufacture and assembly in the future.
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Books on the topic "Centrifugal vertical pumps"

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Parker, Philip M. The 2007-2012 World Outlook for Parts and Attachments for Pumps and Pumping Equipment Excluding Aftermarket Parts for Centrifugal, Vertical Turbine, and Reciprocating Pumps. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Parts and Attachments for Pumps and Pumping Equipment Excluding Aftermarket Parts for Centrifugal, Vertical Turbine, and Reciprocating Pumps. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Horizontal and Vertical Propeller-And Mixed-Flow Centrifugal Pumps of over 36 Inches Including Vertical Turbines over 36 Inches. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Horizontal and Vertical Propeller-And Mixed-Flow Centrifugal Pumps of 36 Inches or Less Including Vertical Turbines over 36 Inches. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Horizontal and Vertical Propeller-And Mixed-Flow Centrifugal Pumps of 36 Inches or Less Including Vertical Turbines over 36 Inches. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Vertical, In-Line Frame Single-Stage Single-Suction Centrifugal Pumps with Discharge of over 2 Inches. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Vertical, In-Line Frame Single-Stage Single-Suction Centrifugal Pumps with Discharge of over 2 Inches. ICON Group International, Inc., 2006.

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Parker, Philip M. The 2007-2012 World Outlook for Vertical, In-Line Frame Single-Stage Single-Suction Centrifugal Pumps with Discharge of 2 Inches or Less. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Vertical, In-Line Frame Single-Stage Single-Suction Centrifugal Pumps with Discharge of 2 Inches or Less. Icon Group International, Inc., 2005.

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The 2006-2011 World Outlook for Non-Submersible Sewage-Type Vertical and Horizontal Centrifugal Pumps of More Than 12 Inches with Non-Clog Impeller. Icon Group International, Inc., 2005.

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Book chapters on the topic "Centrifugal vertical pumps"

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Karassik, Igor J., and Terry McGuire. "Special Designs: Vertical Pumps." In Centrifugal Pumps. Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-6604-5_14.

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Rao, V. Shrinivas, Sachin Kumar Tripathi, and Saurabh Sharma. "Development of One of the World’s Largest Single Stage Vertical Centrifugal Pumps for Lift Irrigation Scheme." In Fluid Mechanics and Fluid Power – Contemporary Research. Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_81.

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Fiske, Erik B. "Vertical Pumps." In Centrifugal Pumps. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-08-050085-0.50012-6.

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Conference papers on the topic "Centrifugal vertical pumps"

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Marçal, Renan, Valdir Estevam, and Marcelo Souza de Castro. "Experimental Study of Gas-Liquid Flow Through Vertical Curves: A Parallel with Gas Locking Phenomenon in Centrifugal Pumps." In The 5th World Congress on Momentum, Heat and Mass Transfer. Avestia Publishing, 2020. http://dx.doi.org/10.11159/icmfht20.109.

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Minisci, Edmondo, Haysam Telib, and Giancarlo Cicatelli. "Hydraulic Design Validation of the Suction Intake of a Vertical Centrifugal Pump Station by Use of Computational Fluid Dynamic (CFD) Analysis." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77330.

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The correct operation of vertical centrifugal pumps is strongly dependent on the design of the entire pump intake system, which includes the suction sump and the associated piping. From the hydraulic point of view, the sump or pump intake design is one of the most critical aspect the designer is facing with: an incorrect sump dimensioning can determine the onset of detrimental fluid dynamic phenomena like pulsation, cavitation and a vortical activity which can easily lead to the appearance of undesired vibration of the entire pump structure. Basic guidelines for the sump and the intake pipeline design have been well established over the years and are now widely published. They include recommendations for the definition of the main sump dimensions, together with the minimum submergence as well as recommended typical velocities approaching the pump suction bell. When shape and dimensions are not standard, it is very often required to perform an experimental investigation of the sump characteristics with a scaled model to evaluate the hydraulic behavior of the intake system and, if necessary, provide indications for changes in the system layout to meet the required criteria. In the recent years, CFD has become a well established tool for the design validation of all pumps components. Nevertheless, numerical simulation applied to intake systems has not yet received the deserved attention, most probably due to the massive computational resources required for the modelization of complex intake structures. With the more extensive availability of powerful computers and advanced computational codes, this is not anymore an obstacle. In this respect, the numerical simulation can be seen as a realistic and more economical alternative to model testing. The paper presents an application of the CFD analysis to the hydraulic evaluation of a pump station intake. In the absence of a model test and thanks to a not complex geometry of the sump under investigation, the numerical results can be easily compared to the expected results obtained with the more traditional methods (i.e. Hydraulic Institute) for a basic validation of the numerical simulation. Eventually, the exercise claims to be a contribution to the rising debate on the applicability of numerical simulation to this kind of applications.
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Hannot, Stephan D. A., and Jort M. van Wijk. "Heave Induced Internal Flow Fluctuations in Vertical Transport Systems for Deep Ocean Mining." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23684.

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Deep ocean mining systems will have to operate often in harsh weather conditions with heavy sea states. A typical mining system consists of a Mining Support Vessel (MSV) with a Vertical Transport System (VTS) attached to it. The transport system is a pump pipeline system using centrifugal pumps. The heave motions of the ship are transferred to the pump system due to the riser-ship coupling. Ship motions thus will have a significant influence on the internal flow in the VTS. In this paper, the influence of heave motions on the internal flow in the VTS for a typical mining system for Seafloor Massive Sulfide (SMS) deposits in Papua New Guinea is analyzed. Data on the wave climate in the PNG region is used to compute the ship motions of a coupled MSV-VTS. The ship motions then are translated into forces acting on the internal flow in order to compute fluctuations in the internal flow. In this way, the workability of the mining system with respect to the system’s production can be assessed. Based on a detailed analysis of the internal flow in relation to ship motions, the relevance of a coupled analysis for the design of VTS is made clear. This paper provides a method for performing such analyses.
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Li, Zhong, Yuan Fu, Jianyu Zhang, et al. "Design and Test for a High-Temperature Molten Salt Pump." In ASME/NRC 2014 12th Valves, Pumps, and Inservice Testing Symposium. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/nrc2014-5024.

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A high-temperature molten salt pump, described as mechanical, free-surface, centrifugal, vertical-shaft, sump type, working at 500°C [932°F] to 600°C [1112°F], has been developed for the Thorium-Based Molten Salt Reactor (TMSR). Flow passage components of the pump are made of Hastelloy C-276 to ensure sufficient strength and corrosion resistance at high temperature. Also, a heat shield plug with air-cooled channels was designed to separate the drive motor, seal elements, and bearings from intense radioactivity and to keep the temperature of the flange seal below 150°C [302°F] and the temperature of the bearing below 80°C [176°F]. A dry gas seal was used so that there is zero leakage. Furthermore, some analysis of hydraulics characteristics, temperature field, thermal stress, and strain was performed to research the pump’s performance, and then the temperature field and the hydraulics were measured to validate the analysis results. The results show that the hydraulics, thermal stress, and strain meet the design value very well. The pump has been successfully operated on a LiF-NaF-KF test loop for over 250 hr. at temperatures of 500°C [932°F] to 600°C [1112°F], speeds of 1050 to 1450rpm, and flows of 15 m3/h [66 gpm] to 25 m3/h [110 gpm]. Paper published with permission.
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Childs, Dara W., and Ameen Muhammed. "Comments on a Newly-Identified Destabilizing Rotordynamic Mechanism Arising in Vertical Hydraulic Turbines and the Back Shrouds of Centrifugal Impellers." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94202.

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In three 2010 papers, Tsujimoto, Ma, Song, and Horiguchi [1–3] discussed and explained a novel destabilizing mechanism arising in both hydraulic turbines and the back surface of vertical pump impellers. The destabilizing mechanism can be explained via a reaction force-moment model that includes both the customary radial displacement vector of an impeller plus the pitch and yaw degrees of freedom. This coupling between radial displacements and tilt plus the coupling of the shaft support structure can create negative damping. In 1993, Verhoeven, et al. [4] identified negative damping arising from U-shaped wearing-ring seals as causing a super-synchronous instability in a horizontal coke-crusher pump. However, several case studies have been presented of super-synchronously unstable pumps for which (until now) no explanation could be provided. Tsujimoto-Song started with a 2DOF model for a disk suspended vertically via a cantilevered shaft. They used an f = ma model for the lateral displacements of the disk and used flexibility coefficients to account for reaction forces and moments from the back shroud of the impeller. The present work starts with a 4DOF model that includes the disk’s displacements and pitch and yaw degrees of freedom. Guyan reduction is used to create two reduced 2DOF models, Model A that retains the displacements and discards the rotations and Model B that retains the rotations and discards the displacements. Model A produces a requirement for instability that is inconsistent with Tsujimoto-Song’s experience and predictions. However, it is useful in predicting the reaction moments produced by a nominally planar precession of the impeller. The instability requirement of Model B is consistent with Tsujimoto’s experience and predictions. A comparison of the predicted reaction moments of Model A and Tsujimoto’s reaction-moment data supports the instability predictions of Model B (and Tsujimoto-Song) that the instability arises due to coupling between the displacement and rotation degrees of freedom in the 4 × 4 damping matrix.
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Verichev, Stanislav, Valery Drobadenko, Nikolay Malukhin, et al. "Assessment of Different Technologies for Vertical Hydraulic Transport in Deep Sea Mining Applications." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83156.

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Successful mining of deep sea deposits strongly depends on the proper choice of the right equipment. The most probable concept for a deep sea mining system would consist of the three major sub-components: Seafloor Mining Tool, Vertical Transport System and Mining Support Vessel. In this paper, emphasis is placed on the Vertical Transport System. We analyse the pros and cons of the different concepts such as hydraulic transport using centrifugal or positive-displacement slurry pumps, conventional and unconventional airlift systems, vertical offshore mining systems and vortex slurry transportation systems. All these systems are considered for their applicability at different water depths (from the relatively shallow to the relatively deep) for the different types of materials (from the relatively fine to the relatively coarse) and various production rates in terms of the efficiency, reliability and state of the art of technology.
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Liu, Ding-Qu, Guang-Fu Bin, Yong-Yi Gao, and Xue-Jun Li. "VERTICAL MULTISTAGE CENTRIFUGAL PUMP ROTOR WITH LIQUID ADDED MASS DYNAMIC MODEL AND VIBRATION CHARACTERISTICS." In 2015 International Conference on Energy and Mechanical Engineering. WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789814749503_0122.

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Tanaka, Takaharu. "An Investigation on Energy Transfer Mechanism Caused in Rotating Flow Passage of Turbomachinery and Practical Performance Characteristic Curve." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95441.

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Hydraulic energy is constructed from two different kinds hydraulic energies. One is the singled irreversible kinetic hydraulic energy that acts horizontal direction. It produces mass weight flow rate. The other is the un-kinetic reversible potential energy. Potential energy is stored on the fluid particle in the form of coupled (or twined) real and imaginary energies. Typical of real energy is potential energy, which is equivalent to pump and water turbine heads. It is caused by the real gravitational acceleration and directs vertical downward. Real potential head is balanced with the imaginary force, which is caused by the imaginary acceleration whose magnitude is equivalent to real gravitational acceleration but its acting direction is opposed to that, therefore, vertical upward. Therefore, to produce the higher real potential pump head that directs vertical downward, the imaginary centrifugal force, whose acting direction is opposed to real potential head, has to be produced and act on the fluid particle vertical upward as much by the impelling action in the rotating flow passage of centrifugal pump.
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Chao You, Weiwei Wang, and Xidong Wu. "Study on head characteristics of low-charge conditions of vertical centrifugal pump with medium-low specific speed." In 2014 ISFMFE - 6th International Symposium on Fluid Machinery and Fluid Engineering. Institution of Engineering and Technology, 2014. http://dx.doi.org/10.1049/cp.2014.1154.

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Furlan, John M., Mohamed Garman, Jaikrishnan Kadambi, Robert J. Visintainer, and Krishnan V. Pagalthivarthi. "Ultrasonic Measurements of Local Particle Velocity and Concentration Within the Casing of a Centrifugal Pump." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-31217.

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In the design of slurry transport equipment used in the mining and dredging industries, the effects of solid particle velocity and concentration on hydraulic performance and wear need to be considered. Two ultrasonic techniques have been used to investigate slurry flows through a centrifugal pump casing: a local particle concentration measurement technique (Furlan et al., 2012) and a pulsed ultrasonic Doppler Velocimetry (PUDV) technique (Hanjiang, 2003, Garman, 2015). Local particle velocities and concentrations have been obtained in a flow of soda lime glass particles (diameter of 195 μm) and water through the casing of a centrifugal slurry pump operating close to the best efficiency point using the two ultrasound techniques. For the concentration measurements, the acoustic properties of slurry flows such as sonic velocity, backscatter, and attenuation are correlated to the volume fraction of solid particles. The algorithm utilizes measurements obtained from homogeneous vertical pipe flow fields as calibration data in order to obtain experimental concentration profiles in the non-homogenous flow regimes which are encountered in the pump casing. The PUDV technique correlates the Doppler shift in frequency associated with the movement of particles towards or away from the transducer. A two measurement (angle) technique is applied within the pump casing in order to account for the components of particle velocity which are orthogonal to the casing side wall. The techniques are utilized to obtain concentration and velocity profiles within the pump casing for overall average loop particle concentrations ranging from 7–11 % by volume. The experimental results are compared with the concentration and velocity fields that are predicted by in-house finite element computational fluid dynamics (CFD) codes (Pagalthivarthi and Visintainer, 2009) which are used to predict wear in centrifugal slurry pump wet end components. Reasonable agreement is observed for both the concentration and velocity fields. Specifically, measurements indicate that there is a reduction of in-situ concentration and hence a corresponding radial acceleration of the particles with respect to the fluid occurring within the impeller which has also been predicted by computational predictions of flow through the impeller (Pagalthivarthi et al., 2013). Additionally, the prediction of the existence of secondary flow patterns by the casing computational code has been supported with the velocity measurements.
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