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Journal articles on the topic 'Liquid ring pump'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Qiu, Guang Qi, Si Huang, Lan Lan Zhu, Yu Chen, and Jing He. "Performance Monitoring Analysis of Liquid Ring Vacuum Pumps." Applied Mechanics and Materials 853 (September 2016): 463–67. http://dx.doi.org/10.4028/www.scientific.net/amm.853.463.

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Liquid ring vacuum pump which uses rotating liquid as piston to abstract and compress gas is a kind of rotating positive displacement pump. Its running state implies some fault informantion. To capture performance levels of liquid ring vacuum pump, a comprehensive performance monitoring system includes data acquisition, data reprocessing, data storage, abnormal judgment and fault alarm, performance displaying is developed in this paper. Hence, the performance levels of liquid ring vacuum pump can be observed anytime by the monitoring system, the maintenance cost can be reduced, pumps can be operated at the highest performance level as far as possible, the reliability and the maintainability of liquid ring vacuum pump can be effectively improved by this monitoring system.

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2

Huang, Si, Jing He, Xueqian Wang, and Guangqi Qiu. "Theoretical Model for the Performance of Liquid Ring Pump Based on the Actual Operating Cycle." International Journal of Rotating Machinery 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/3617321.

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Liquid ring pump is widely applied in many industry fields due to the advantages of isothermal compression process, simple structure, and liquid-sealing. Based on the actual operating cycle of “suction-compression-discharge-expansion,” a universal theoretical model for performance of liquid ring pump was established in this study, to solve the problem that the theoretical models deviated from the actual performance in operating cycle. With the major geometric parameters and operating conditions of a liquid ring pump, the performance parameters such as the actual capacity for suction and discharge, shaft power, and global efficiency can be conveniently predicted by the proposed theoretical model, without the limitation of empiric range, performance data, or the detailed 3D geometry of pumps. The proposed theoretical model was verified by experimental performances of liquid ring pumps and could provide a feasible tool for the application of liquid ring pump.

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3

Velikanov, N. L., V. A. Naumov, and S. I. Koryagin. "Pumping of Liquids Using Liquid-Ring Pumps." Proceedings of Higher Educational Institutions. Маchine Building, no. 08 (725) (August 2020): 51–59. http://dx.doi.org/10.18698/0536-1044-2020-8-51-59.

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The paper examines modelling of the pumping stages when using liquid-ring pumps, for example, in power plants and technological devices. It is important to determine the characteristics of various processes involved in liquid pumping using vacuum because the accuracy of predicting how objects move in such flows cannot be improved without solving the problems related to the calculation of hydraulic and power characteristics of the pumping unit in the network. Cubic spline functions were used as approximating functions when calculating the performance characteristics of a liquid-ring vacuum pump. The dynamics of changes in the pressure in the working vessel during operation of an ELRS-5 pump was considered for different values of the leakage coefficient. Solutions of the Cauchy problem were obtained using the numerical method. The paper presents the results of calculating the dynamics of the process of liquid pumping into the working vessel at different values of the vacuum creation time. As the time increases, the liquid flow rate quickly reaches its maximum value, and then falls with a decrease in the pressure drop. The higher the maximum flow rate, the longer the time.

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4

Fujita, Masaru, Susumu Ishii, Satoshi Yamazaki, and Tatsuro Yoshinaga. "The Visualization of Liquid Ring a Single Action Type Liquid Ring Pump." Journal of the Visualization Society of Japan 23, Supplement2 (2003): 91–94. http://dx.doi.org/10.3154/jvs.23.supplement2_91.

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5

FUJITA, Masaru, Susumu ISHII, Satoshi YAMAZAKI, and Tatsuro YOSINAGA. "The Visualization of Liquid Ring a Single Action Type Liquid Ring Pump." Proceedings of Conference of Tohoku Branch 2003.38 (2003): 40–41. http://dx.doi.org/10.1299/jsmeth.2003.38.40.

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6

Han, Jian Yong, and Guo Jing Chen. "Numerical Simulation Analysis of Centrifugal Pump Floating Ring Seal." Advanced Materials Research 317-319 (August 2011): 2148–51. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.2148.

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According to the studying on the force analysis of floating ring of centrifugal pump, the paper think that floating ring stress will change with the change of centrifugal pump’ s condition. Using fluent software, the floating ring seal was simulated and analyzed. Results show that the liquid force acted on the floating ring is nonuniform and asymmetrical as wedging effect, and that section maximum pressure is not lies in the smallest clearance place, but in the wedge area where liquid flows to the minimum clearance, because the effect of Leak resistance is better in high pressure than low pressure. The leakage decreases and liquid resistance increases with the increases of RPM. The leakage increases with the increases of differential pressure in sealing ring sides and eccentricity. Pressure distribution within the seal clearance is not uniform with the increases of eccentricity.

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7

Kirk, R. G. "Transient Response of Floating Ring Liquid Seals." Journal of Tribology 110, no. 3 (July 1, 1988): 572–77. http://dx.doi.org/10.1115/1.3261688.

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The design and analysis of pressure balanced seals are important to the designers and users of turbomachinery which require floating element seals. The design objective for compressor seals differs from that of the engineered pump seal but the common factor includes the ability to predict the dynamic response of the floating ring seal relative to the rotor shaft. Steady-state calculations can be used to study possible operating conditions for compressor designs, but they do not include accurate account of rotor shaft response and ring spin torque. In addition, engineered pump seal applications are such that the ring is expected to track shaft movement during start-up and shut-down transients when reduced pressures and leakage produce laminar flow sealing conditions. The analysis presented in this paper gives the designer the ability to evaluate seal ring dynamic transient response, including friction stick-slip on the axial sealing face and the ring spin torque interaction with the antirotation element. The analysis results presented in this paper were obtained from a personal computer program written specifically for seal transient analysis.

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8

P, Ravi Kumar. "Experimental Analysis of Liquid Ring Vacuum Pump Cavitation Reduction." International Journal for Research in Applied Science and Engineering Technology 7, no. 11 (November 30, 2019): 723–26. http://dx.doi.org/10.22214/ijraset.2019.11119.

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9

YOSHINAGA, Tatsuro, and Masaru FUJITA. "A Method of the Shape Calculation of Liquid Ring inside a Single Action Type Liquid Ring Pump." Proceedings of Yamanashi District Conference 2002 (2002): 183–84. http://dx.doi.org/10.1299/jsmeyamanashi.2002.183.

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10

Olšiak, Róbert, Zoltán Fuszko, and Zoltán Csuka. "Reduction of the suction pressure of a liquid ring vacuum pump with a supersonic gas ejector." MATEC Web of Conferences 168 (2018): 03002. http://dx.doi.org/10.1051/matecconf/201816803002.

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A supersonic gas ejector in conjunction with a liquid ring vacuum pump is used for creating and maintaining vacuum in a chamber for technological purposes. In this paper the authors submit an overview about the problematics of suction pressure reduction with a supersonic gas ejector used as a pre-stage of a liquid ring vacuum pump. This system has also the function of a cavitation protection due to the higher pressure present at the suction throat of the vacuum pump. A part of this paper is devoted to the governing equations used at the definition of the flow through an ejector. The experimental studies are then carried out in or own laboratory for verification purposes.

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11

Rodionov, Yu V., P. A. Galkin, D. V. Nikitin, and M. V. Sychev. "Design Features of Liquid Ring Vacuum Pump with Kinematic Link." Vestnik Tambovskogo gosudarstvennogo tehnicheskogo universiteta 22, no. 3 (2016): 463–70. http://dx.doi.org/10.17277/vestnik.2016.03.pp.463-470.

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12

Xu, Xiao Bing, and Liang Zhu. "The Application of Bridgman’s Seal and B-Ring Seal in the Process of Pump Head Auto-Frettage." Applied Mechanics and Materials 318 (May 2013): 130–33. http://dx.doi.org/10.4028/www.scientific.net/amm.318.130.

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In this paper,it is described that the seal selected and structure design of plunger hole and liquid export seal in the pump head’s experiment of extra-high pressure and auto-frettage. Then,Bridgman’s seal and design account for gasket is chose. And liquid export seal used B-ring is chose and analyzed by FEM. The results provide a basis for the experiment about pump head’s extra-high pressure and auto-frettage.

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13

Velikanov, N. L., and V. A. Naumov. "Modeling of Characteristics of Water-Ring Vacuum Pumps." Proceedings of Higher Educational Institutions. Маchine Building, no. 10 (715) (October 2019): 70–77. http://dx.doi.org/10.18698/0536-1044-2019-10-70-77.

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Physical and mathematical modeling of characteristics of water-ring vacuum pumps has a number of specific features. Isothermal efficiency, i.e. the ratio of the isothermal gas compression power to the pump power consumed is used as an efficiency indicator. The article describes the existing methods of hydraulic calculation of pumping units. An analysis of physical models, numerical values of empirical coefficients is carried out. An improved algorithm for calculating water-ring vacuum pumps of different manufacturers in the framework of previously developed models is presented. The calculations of compressors manufactured by ZAO Beskom (VVN-3, VVN1-6, VVN1-12) and ERSTVAK (ELRS-45, ELRS-57) are considered as examples. The results of tests of vacuum pumps published by the manufacturers in the open press are used as the initial data for the calculations. The experimental dependences of the performance, power expended, isothermal efficiency of water-ring vacuum pumps on the suction pressure are presented. The results obtained make it possible to improve the accuracy and reliability of predicting the amount of displaced liquid or steam during the operation of the pumping unit.

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14

Brunn, Claudia, Sokratis Sinanis, Susanne Mall-Gleissle, and Karlheinz Schaber. "Generation and Deposition of Organic Nanoparticles in a Liquid Ring Pump." Chemical Engineering & Technology 38, no. 5 (April 2, 2015): 827–34. http://dx.doi.org/10.1002/ceat.201400353.

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15

Gabdrafikov, Fanil', Irshat Aysuvakov, and Ilgiz Galiev. "DIESEL INJECTOR PUMP WITH RING CONTROL VALVE." Vestnik of Kazan State Agrarian University 15, no. 1 (May 14, 2020): 68–75. http://dx.doi.org/10.12737/2073-0462-2020-68-75.

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The studies were carried out with the aim of modernizing the pump injector with a hydraulic actuator of the HEUI system plunger with the development of a control valve model based on a split elastic ring that provides fast fuel injection control. The upgraded device differs from the existing ones in that instead of a control freely floating valve (ball) or a poppet valve with springs, a valve in the form of a split elastic ring is installed in the valve assembly. One end of this ring is fixed rigidly, the other is freely movable to block the drain channel of the liquid. The canal overlaps the free edge of the ring when the electromagnet is turned on (installed with a gap inside the ring), and also (in the absence or malfunction of the electromagnet) from the valve itself running under the pressure of the supplied fluid. When upgrading the pump injector by the proposed method and using an annular control valve with electronic control (with optimal ring parameters), a new technical effect is achieved - reducing the response time of the control valve. This is due to the fact that the free edge of the split elastic ring, like a mechanical multiplier, blocks the drain canal π times faster than the valve stroke when it rises from the pressure of the fluid flow or signal when the electromagnet is on. The ring valve simultaneously acts as a spring to return to its original position, simplifying the design as much as possible. In the course of research, a new mathematical expression was derived for calculating the valve stroke depending on its design parameters. Using this formula, the optimal parameters of the control ring valve of the pump injector were established, which affect the quality of fuel injection in a wide range of diesel operation: diameter - 20 mm, ring width - 12 mm, thickness - 0.46 mm, diameter of the control fluid supply canal - 3 mm.

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16

Olšiak, Róbert, Marek Mlkvik, František Ridzoň, and Pavol Slovák. "Two stage ejector as a pre-stage of the water ring vacuum pump." Mechanics & Industry 20, no. 7 (2019): 703. http://dx.doi.org/10.1051/meca/2019069.

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A supersonic gas ejector in conjunction with a liquid ring vacuum pump is used for creating and maintaining a vacuum in a chamber for technological purposes. In this paper, the authors submit an overview of the problematics of suction pressure reduction with a supersonic gas ejector used as a pre-stage of a liquid ring vacuum pump. This system has also the function of a cavitation protection due to the higher pressure present at the suction throat of the vacuum pump. A part of this paper is devoted to the governing equations used at the definition of the flow through an ejector. The CFD analysis of the problem was implemented with the package Fluent in 2 dimensions using the axisymmetric approach. The parts of the physical model were printed on a STRATASYS 3D printer, or were cast from technical resin. The experimental studies are then carried out in our own laboratory for validation purposes.

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17

Yaroshevsky, V., V. Bulgakov, S. Ivanovs, V. Krutyakova, V. Belchenko, and J. Olt. "RESEARCH ON THE IMPACT OF THE AIR-LIQUID JET MIXER UPON RING BIOREACTOR OPERATION." INMATEH Agricultural Engineering 60, no. 1 (April 30, 2020): 115–22. http://dx.doi.org/10.35633/inmateh-60-13.

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In the production of biological preparations for agriculture there are promising jet bioreactors with an external circulation ring, providing intense mixing of the medium along with a high degree of aeration. However, application of these bioreactors is limited by large shear loads on the microorganisms (microorganism cells) arising in the circulation pump. The article deals with one of the ways for solving this problem by using a low-capacity pump for the circulation of the fermentation medium according to a non-standard scheme of medium jet aeration in order to intensify the mass exchange processes. There are presented results of physical simulation of the mixing parameters of flows in an aerator-jet mixer and their impact upon the intensity of metabolic processes in the circulation ring of a bioreactor.

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18

Yan, Wen Hui, Ping Gao, and Yong Chen. "Structural Design for Oil Well Pump with Soft Sealing and Small Diameter Piston." Advanced Materials Research 655-657 (January 2013): 359–64. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.359.

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For the low pumping demand of daily production per well of low permeability oilfield, a diameter of 25mm soft sealing small diameter piston-type subsurface pump is designed, and an external traveling valve to ensure that the valve still application of standard parts is adopted, while reducing the pump barrel diameter. In order to solve the problems of pump leakage increasing with wear, automatically compensate for soft seal ring is adopted in piston design. The liquid pressure of the pump barrel is changed in the pump working process, so that the sealing ring is deformed outwardly. When the pump reaches the upper stroke, the gap between the pump barrel and the piston reduced, and further improve the sealing effect. The innovation of structure and the selection of new materials can reduce the difficulty of pump processing, as well as can extend the maintenance cycle. This paper introduces the overall structure and sealing characteristics of soft sealing small diameter piston-type subsurface pump. If the soft sealing small diameter piston-type subsurface pump and real-time variable frequence control technique of pumping unit combined, a more reasonable machine rod pump combination can be provided to achieve ultra-low permeability oilfield stripped well efficiently pumping.

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19

Zhang, Renhui, and Guangqiang Guo. "Experimental study on gas-liquid transient flow in liquid-ring vacuum pump and its hydraulic excitation." Vacuum 171 (January 2020): 109025. http://dx.doi.org/10.1016/j.vacuum.2019.109025.

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20

Baheti, S. K., and R. G. Kirk. "Analysis of High Pressure Liquid Seal Ring Distortion and Stability Using Finite Element Methods." Journal of Tribology 121, no. 4 (October 1, 1999): 921–26. http://dx.doi.org/10.1115/1.2834156.

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The evaluation of floating bushing ring oil seals is of great importance for designs of high pressure centrifugal compressors. This is a result of their enhanced damping capacity at low speeds and their strong destabilizing action at speeds in excess of twice the compressor first critical speed. Accurate prediction of oil seal leakage and exit temperature is very important from the standpoint of the pump and cooler selection for the seal oil console. The previous research has performed thermohydrodynamic (THD) analysis of bushing seal rings with various geometries. The current work is to evaluate the influence of the mechanical deformation on the thermohydrodynamic analysis of the bushing seal ring. The finite element method is used to predict the mechanical deformation of the bushing seal ring due to oil pressure and to solve the nonlinear and coupled Reynolds and energy equations for the pressure and temperature distributions, respectively. The perturbation technique is used to evaluate the stiffness and damping coefficients of the oil seals. Eigenvalue analysis is performed to study the dynamic stability of the compressor rotor. Results comparing the seal leakage, seal oil outlet temperatures, stiffness and damping coefficients, growth factors and damped natural frequencies from the THD analyses with and without the influence of the mechanical deformation of the bushing seal ring are presented. The results indicate that under high pressure conditions the influence of the mechanical deformation of the bushing seal ring on the seal performance is very significant.

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21

Dong, Wei, Diyi Chen, Jian Sun, Yan Dong, Zhenbiao Yang, and Junle Yan. "Influence of Balance Hole Diameter on Leakage Flow of the Balance Chamber in a Centrifugal Pump." Shock and Vibration 2021 (February 5, 2021): 1–11. http://dx.doi.org/10.1155/2021/8860493.

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The balancing holes in centrifugal pumps with seals mounted in both suction and discharge sides are one of the approaches used by pump manufacturers to reduce the axial thrust. The balance hole diameter directly affects the axial force of the centrifugal pump. The flow characteristics in the balance chamber are closely related to the balance hole diameter. However, research is not very clear on the internal flow of the balanced chamber, due to the small axial and radial sizes and the complicated flow conditions in the chamber. In this paper, we analyzed the influence of the balance hole diameter on the liquid leakage rate, flow velocity, and vortex motion in the balance chamber. The results indicated that when the balance hole diameter was lower than the design value, the volume flow rate of leakage flow was proportional to the diameter. The liquid flow rate and vortex distribution rules in the balance chamber were mainly associated with the coeffect of radial leakage flow in the rear sealing ring interval and the axial balance hole leakage flow. The research has revealed the mechanisms of leakage flow of the balance chamber in the centrifugal pump and that this is of great significance for accurate calculation and balancing of the axial force.

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22

Родионов, Юрий Юрьевич, Анастасия Игоревна Скоморохова, Юрий Викторович Родионов, Дмитрий Вячеславович Никитин, Сергей Иванович Данилин, Анна Олеговна Сухова, and Антон Владимирович Сильвестров. "Prospects of using a liquid ring vacuum pump with automatic adjustable discharge window when grinding grape seeds and pomace." Magarach Vinogradstvo i Vinodelie, no. 1(115) (March 22, 2021): 55–60. http://dx.doi.org/10.35547/im.2021.50.40.009.

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Для повышения сохранения биологически активных веществ, уменьшения энергопотребления в процессе измельчения и получения порошка заданной степени помола из виноградных выжимок и семян предлагается использование установки двухступенчатой дисково-шаровой вакуумной мельницы. Предложенная конструкция двухступенчатой мельницы оказывает влияние на безопасность работы (исключаются взрывы) и экологичность (не создает запыленности окружающей среды). В конструкции разработанной установки важным объектом является вакуумный насос. Приведены устройство и основные принципы работы классического одноступенчатого водокольцевого вакуумного насоса производства ОАО «БЕСКОМ» и жидкостно-кольцевого вакуумного насоса с возможностью автоматического регулирования размеров нагнетательного окна, разработанного в ФГБОУ ВО «ТГТУ» на кафедре «МИГ». Показаны основные преимущества предлагаемого насоса по сравнению с классическим вариантом. На основе испытаний был проведен сравнительный анализ разработанного жидкостно-кольцевого вакуумного насоса с автоматическим регулируемым размером нагнетательного окна и классического вакуумного насоса равной быстроты действия, результаты которого продемонстрировали существенную эффективность использования первой машины. Установлено, что затраты удельной мощности в процессе транспортирования растительных порошков на 20-25% ниже при равной быстроте действия. Экономический расчет демонстрирует эффективность применения новой конструкции разработанного вакуумного насоса в технологическом процессе тонкого измельчения сухих растительных продуктов за счет вакуумного отвода заданной фракции помола. Поэтому разработанный насос рекомендуется использовать для измельчения сухих сыпучих растительных продуктов на крупных перерабатывающих предприятиях агропромышленного комплекса, пищевой, фармацевтической и парфюмерной отраслях промышленности. To increase the preservation of biologically active substances, reduce energy consumption in the grinding process and obtain a powder of a given degree of grinding from grape pomace and seeds, it is proposed to use a two-stage disk-ball vacuum mill. The proposed design of a two-stage mill affects the safety of work (excluding explosions) and environmental friendliness (does not create a dusty environment). An important object in the design of the developed installation is the vacuum pump. The device and basic principles of operation of a classic single-stage liquid ring vacuum pump manufactured by JSC "BESCOM" and a liquid ring vacuum pump with the ability to automatically adjust the size of the discharge window, developed at the TSTU Department of MIG are presented. The main advantages of the proposed pump in comparison with the classic version are shown.Based on the tests, a comparative analysis of the developed liquid ring vacuum pump with an automatically adjustable discharge window size and a classical vacuum pump of equal action speed was carried out, the results of which demonstrated the significant efficiency of using the first machine. It has been established that the specific power consumption in the process of transporting plant powders is 20-25% lower with the same speed of action. An economic calculation demonstrates the effectiveness of using a new design of the developed vacuum pump in the technological process of fine grinding of dry plant products due to the vacuum removal of a given grinding fraction. Therefore, the developed pump is recommended to be used for grinding dry bulk plant products at large processing enterprises of the agro-industrial complex, food, pharmaceutical and perfumery industries.

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23

Shih, Yi-Hong, Xin-Yu Lin, Harry Miyosi Silalahi, Chia-Rong Lee, and Chia-Yi Huang. "Optically Tunable Terahertz Metasurfaces Using Liquid Crystal Cells Coated with Photoalignment Layers." Crystals 11, no. 9 (September 10, 2021): 1100. http://dx.doi.org/10.3390/cryst11091100.

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An optically tunable terahertz filter was fabricated using a metasurface-imbedded liquid crystal (LC) cell with photoalignment layers in this work. The LC director in the cell is aligned by a pump beam and makes angles θ of 0, 30, 60 and 90° with respect to the gaps of the split-ring resonators (SRRs) of the metasurface under various polarized directions of the pump beam. Experimental results display that the resonance frequency of the metasurface in the cell increases with an increase in θ, and the cell has a frequency tuning region of 15 GHz. Simulated results reveal that the increase in the resonance frequency arises from the birefringence of the LC, and the LC has a birefringence of 0.13 in the terahertz region. The resonance frequency of the metasurface is shifted using the pump beam, so the metasurface-imbedded LC cell with the photoalignment layers is an optically tunable terahertz filter. The optically tunable terahertz filter is promising for applications in terahertz telecommunication, biosensing and terahertz imaging.

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24

Guo, Guangqiang, Renhui Zhang, and Hao Yu. "Evaluation of different turbulence models on simulation of gas-liquid transient flow in a liquid-ring vacuum pump." Vacuum 180 (October 2020): 109586. http://dx.doi.org/10.1016/j.vacuum.2020.109586.

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25

Cong, Qian, Tianyu Gao, Yiwen Sun, and Weijun Tian. "Sealing Performance of Bionic Striped Mud Pump Piston." Advances in Materials Science and Engineering 2019 (February 4, 2019): 1–9. http://dx.doi.org/10.1155/2019/8751540.

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The mud pump piston is a key part for providing mud circulation, but its sealing performance often fails under complex working conditions, which shorten its service life. Inspired by the ring segment structure of earthworms, the bionic striped structure on surfaces of the mud pump piston (BW-160) was designed and machined, and the sealing performances of the bionic striped piston and the standard piston were tested on a sealing performance testing bench. It was found the bionic striped structure efficiently enhanced the sealing performance of the mud pump piston, while the stripe depth and the angle between the stripes and lateral of the piston both significantly affected the sealing performance. The structure with a stripe depth of 2 mm and angle of 90° showed the best sealing performance, which was 90.79% higher than the standard piston. The sealing mechanism showed the striped structure increased the breadth and area of contact sealing between the piston and the cylinder liner. Meanwhile, the striped structure significantly intercepted the early leaked liquid and led to the refluxing rotation of the leaked liquid at the striped structure, reducing the leakage rate.

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26

FUJITA, Masaru, Susumu ISHII, and Takeshi KOMIYA. "A Method of the Flow Visualization of inside a Single Action Type Liquid Ring Pump." Proceedings of the Fluids engineering conference 2004 (2004): 319. http://dx.doi.org/10.1299/jsmefed.2004.319.

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27

Liu, Yin Qing, Shi Jun Guo, and Hai Qing Cui. "The Research of Vertical Pipe Flow Rules of Polymer Drive Pump Wells Recovery Liquid." Advanced Materials Research 807-809 (September 2013): 2612–15. http://dx.doi.org/10.4028/www.scientific.net/amr.807-809.2612.

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As polymer flooding in Daqing oil field with the further exploitation,the polymer content in the flooding produced fluids and the produced fluid flow characteristics of polymer are all constant change. The rheology of produced fluids is changed too, it obviously shows non-newtonian fluid properties. About the concentric axis of non-newtonian fluid flow rules of the air the ring,it is becoming more and more important for producted crude oil in Daqing polymer flooding oilfield. This paper built a indoor device that used for the research of Polymer flooding pumping Wells recovery liquid vertical pipe flow rules,had a deep research on flow rules and rheology of Polymer flooding pumping Wells recovery liquid that was coming from Xingbei development zone of Daqing oilfield in the tubing wellbore.

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28

Priekulis, Juris, and Andris Belovs. "MILKING EQUIPMENT VACUUM PUMPS AND THEIR IMPACT ON ENVIRONMENT." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (June 20, 2001): 148. http://dx.doi.org/10.17770/etr2001vol1.1950.

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The aim of the research was to compare different milking equipment vacuum pumps purchased in Latvia according to their influence on the environment and profitability. Information on vacuum pumps available in Latvia is summarised and their classification is elaborated in the investigation. The amount of the working liquid discharged from the vacuum pumps during their operation is experimentally determined. It is stated that for the new lubricated vacuum pumps with oil recirculation system and the pumps with the oil screen the discharge of oil is reduced 60-199 times and it does not essentially influence the environment. The vacuum pumps with lead in their blades produced in Rezekne are also experimentally investigated. It is stated that they are sufficiently wear resistant and they are suitable for operation in mobile milking machines. Vacuum pumps with capacity 800-1000 l/min are compared according to their operational costs. It is stated that the water ring type vacuum pumps produced in Estonia have the lowest costs but the lubricated vacuum pump UVU 45/60 produced in Russian has the highest costs.

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29

Grigorov, V. P., L. V. Sizov, and A. E. Sokolov. "Effect of the presence of a liquid in the outlet gas on the performance of a liquid-ring vacuum pump." Chemical and Petroleum Engineering 22, no. 4 (April 1986): 139–42. http://dx.doi.org/10.1007/bf01149241.

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Liu, Zhi Hai, Qing Liang Zeng, Zai Chao Wu, and Guang Yu Zhou. "Design and Implementation of Automatic Drainage in Coal Mine." Advanced Materials Research 291-294 (July 2011): 2851–54. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2851.

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Drainage system is one of the important sub-systems of coal mine integrative control platform[1], and is used to guarantee the safety of mining and auxiliary transportation under the ground. The functions of drainage system are defined, the network framework is designed, the start and stop procedures of the pump engine under the manual control mode and automatic control mode are described, and the determining methods based on liquid level to control several pumps in automatic mode are analyzed. By using Simense PLC module, power source module, digital module, analog module and touch screen hardware, the drainage system control platform is set up, which is connected to the control computer on the ground by using Simense communication module and industrial ring Ethernet[4], and achieved the purpose of remote control.

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31

Endo, Naoki, Akira Yabe, and Iwao Yamashita. "Helical liquid ring compressor for a steam compression heat pump: I. Concept and basic running characteristics." Heat Transfer?Asian Research 29, no. 8 (2000): 660–73. http://dx.doi.org/10.1002/1523-1496(200012)29:8<660::aid-htj5>3.0.co;2-1.

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32

Osipov, É. V., É. Sh Telyakov, R. M. Latyipov, and D. Bugembe. "Influence of Heat and Mass Exchange in a Liquid Ring Vacuum Pump on Its Working Characteristics." Journal of Engineering Physics and Thermophysics 92, no. 4 (July 2019): 1055–63. http://dx.doi.org/10.1007/s10891-019-02020-7.

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33

Sherov, A. K., D. E. Alikulov, Yu M. Smirnov, K. T. Sherov, A. K. Rakishev, M. M. Mussayev, and A. V. Mazdubay. "RESEARCH OF THE INTERNAL LEAKAGE PROCESS OF A LIQUID IN THE DESIGN OF A GEAR PUMP WITH A TWO-AXIAL CONNECTION." Series of Geology and Technical Sciences 2, no. 446 (April 15, 2021): 198–204. http://dx.doi.org/10.32014/2021.2518-170x.53.

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This article presents the results of a study of the process of internal fluid leakage in the design of a gear pump with a biaxial connection. It is known that the volumetric efficiency mainly depends on the leakage of the working fluid through the gaps formed by the tooth heads and the pump casing, as well as between the end surfaces of the gears and the side walls of the casing. In addition, additional leaks occur along the contact line of the teeth. To reduce radial leaks, the gap between the gears and the pump casing is minimized, and to reduce end-leakage, the side walls are automatically pressed against the end surfaces of the gears by liquid under operating pressure. The design of the pump shows that the main internal fluid leaks occur in the gap between the gears and the housing. Naturally, these leaks require excessive energy consumption and, thereby, reduce the efficiency of the pump. The natural way to combat this circumstance is to reduce the marked gaps to a minimum. This is possible using an additional element - a biaxial sleeve. The dependence of the spring force on the fluid flow rate and the guaranteed gap between the ring gear and the pump casing has been analytically established. They are characterized by a drop in force with an increase in clearance and a rise in flow rate. This is due to an increase in the dynamic force in the gaps, which must be compensated by the spring.

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34

Vemburaj, N. "Augmenting the Capacity of Air Evacuation System of Condensers in 210 MW LMW Turbines by Replacing Main Ejectors and Starting Ejectors by Liquid Ring Vacuum Pump and CFD Analysis of Sealing in the Liquid Ring Vacuum Pump." International Journal for Research in Applied Science and Engineering Technology 7, no. 3 (March 31, 2019): 375–85. http://dx.doi.org/10.22214/ijraset.2019.3066.

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35

ENDO, Naoki, Akira YABE, and Iwao YAMASHITA. "Helical Liquid Ring Compressor for a Steam Compression Heat Pump. 1st Report. Concept and Basic Running Characteristic." Transactions of the Japan Society of Mechanical Engineers Series B 64, no. 625 (1998): 2991–97. http://dx.doi.org/10.1299/kikaib.64.2991.

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36

Huang, Si, Jing He, Xueqian Wang, and Guangqi Qiu. "Corrigendum to “Theoretical Model for the Performance of Liquid Ring Pump Based on the Actual Operating Cycle”." International Journal of Rotating Machinery 2018 (2018): 1. http://dx.doi.org/10.1155/2018/4507324.

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37

Miladi, Rihab, Nader Frikha, and Slimane Gabsi. "Modeling and energy analysis of a solar thermal vacuum membrane distillation coupled with a liquid ring vacuum pump." Renewable Energy 164 (February 2021): 1395–407. http://dx.doi.org/10.1016/j.renene.2020.10.136.

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38

Zhang, Yifan, Fubao Zhou, Jinshi Li, Jianhong Kang, and Qiangqiang Zhang. "Application and research of new energy-efficiency technology for liquid ring vacuum pump based on turbulent drag reduction theory." Vacuum 172 (February 2020): 109076. http://dx.doi.org/10.1016/j.vacuum.2019.109076.

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39

Zhang, Yifan, Jinshi Li, Jianhong Kang, and Fubao Zhou. "Experimental study on the flow and heat transfer behavior of polymer solutions in the closed liquid ring vacuum pump system." Applied Thermal Engineering 199 (November 2021): 117525. http://dx.doi.org/10.1016/j.applthermaleng.2021.117525.

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40

Osipov, Eduard, Eduard Telyakov, and Sergey Ponikarov. "Coupled Simulation of a Vacuum Creation System and a Rectification Column Block." Processes 8, no. 11 (October 22, 2020): 1333. http://dx.doi.org/10.3390/pr8111333.

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The purpose of this study was the coupling simulation of the vacuum block of the ethanolamine mixture separation unit to determine the optimal layout of the vacuum creation system. For this, a computational model of the vacuum unit, which was identified by comparing the computational data with the data of an industrial study of vacuum rectification columns, was synthesized in the Unisim Design R461 software package. To determine the required load on the vacuum system, a numerical experiment was carried out, during which it was discovered that the load on the system would be 9600 m3/h. It was proposed to replace individual column vacuum pumps with a single vacuum-generating system (VGS) based on a liquid ring vacuum pump (LRVP). When defining the layout, two possible schemes were considered, the models of which were created in Unisim Design R461. The system layout was determined by matching the characteristics of the system elements with the characteristics of the vacuum columns. A technical and economic comparison of the proposed solutions was carried out and the payback period for capital costs was calculated, which for Scheme 1 was 4.14 years, and for Scheme 2–3.59 years.

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41

Ha, Tae-Woong, Yong-Bok Lee, and Chang-Ho Kim. "Leakage and rotordynamic analysis of a high pressure floating ring seal in the turbo pump unit of a liquid rocket engine." Tribology International 35, no. 3 (March 2002): 153–61. http://dx.doi.org/10.1016/s0301-679x(01)00110-4.

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42

Рулев, А. В., and Е. Ю. Усачева. "DEVELOPMENT OF A METHOD FOR DETERMINING THE LENGTH TUBE EVAPORATORS AND HEAT PUMP CONDENSERS USING ZEOTROPIC MIXTURES OF WORKING AGENTS." НАУЧНЫЙ ЖУРНАЛ СТРОИТЕЛЬСТВА И АРХИТЕКТУРЫ, no. 4(60) (December 29, 2020): 66–77. http://dx.doi.org/10.36622/vstu.2020.60.4.007.

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Постановка задачи. Необходимо разработать методику определения длины трубных испарителей и конденсаторов тепловых насосов, использующих зеотропные смеси рабочих агентов. Результаты. Приводится описание процессов теплообмена в трубных испарителях и конденсаторах тепловых насосов, использующих в качестве рабочих агентов зеотропные смеси предельных углеводородов, таких как пропан и н-бутан. Указанные смеси полностью озоно-экологически безопасны и наиболее экономичны при подогреве приточного воздуха в системах вентиляции и кондиционирования. Выводы. Разработанная методика позволяет учитывать изменение интенсивности теплообмена и температурных условий в зависимости от непрерывно изменяющихся состава и режимов течения парожидкостной смеси, протекающих в следующей последовательности: расслоенно-пробковый, кольце-волновой и дисперсный. Statement of the problem. It is essential to develop a method for determining the length of tube evaporators and heat pump condensers using zeotropic mixtures working agents. Results. The paper describes heat transfer processes in tube evaporators and heat pump condensers that use zeotropic mixtures of limiting hydrocarbons, such as propane and n-butane, as working agents. These mixtures are completely ozone-friendly and most cost-efficient when heating the supply air in ventilation and air conditioning systems. Conclusions. The developed method allows us to account for changes in the intensity of heat exchange and temperature conditions depending on the continuously changing composition and flow modes of the vapor and liquid mixture, which occur in the following sequence: stratified - cork, ring - wave and dispersed.

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43

DaqiqShirazi, M., R. Torabi, A. Riasi, and SA Nourbakhsh. "The effect of wear ring clearance on flow field in the impeller sidewall gap and efficiency of a low specific speed centrifugal pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 17 (September 13, 2017): 3062–73. http://dx.doi.org/10.1177/0954406217729420.

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In this paper, the flow in the impeller sidewall gap of a low specific speed centrifugal pump is analyzed to study the effect of wear ring clearance and the resultant through-flow on flow field in this cavity and investigate the overall efficiency of the pump. Centrifugal pumps are commonly subject to a reduction in the flow rate and volumetric efficiency due to abrasive liquids or working conditions, since the wear rings are progressively worn, the internal leakage flow is increased. In the new operating point, the overall efficiency of the pump cannot be predicted simply by using the pump characteristic curves. The flow field is simulated with the use of computational fluid dynamics and the three-dimensional full Navier–Stokes equations are solved using CFX software. In order to verify the numerical simulations, static pressure field in volute casing and pump performance curves are compared with the experimental measurements. The results show that, for the pump with minimum wear ring clearance, the disk friction efficiency is the strongest factor that impairs the overall efficiency. Therefore, when the ring clearance is enlarged more than three times, although volumetric efficiency decreases effectively but the reduction in overall efficiency is remarkably smaller due to improvement in the disk friction losses.

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44

Mazlan, A. M., M. R. Sapiee, and M. S. Yahaya. "The Concept of Single Use Piston Break Safety Syringe." Applied Mechanics and Materials 761 (May 2015): 646–50. http://dx.doi.org/10.4028/www.scientific.net/amm.761.646.

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A syringe is a simple piston pump consisting of a plunger that fits tightly in a tube. The plunger can be pulled and pushed along inside a cylindrical tube (the barrel), allowing the syringe to take in and expel a liquid or gas through an orifice at the open end of the tube. The open end of the syringe may be fitted with a hypodermic needle, a nozzle, or tubing to help direct the flow into and out of the barrel. Syringes are often used to administer injections, apply compounds such as glue or lubricant, and measure liquids. The reuse and abuse of syringe has led to cross-infection of diseases; thus, the need of single use safety syringe arises. Single use safety syringe is able to prevent the abuse of syringe. Many inventions have been produced; the most common are through-push retract breakable safety syringe, rotary plunger retractable safety syringe and release-ring breakable safety syringe. A new type of single use safety syringe Piston Break Safety Syringe is discussed in this paper. The new Piston Break Safety Syringe has similar design with the widely used safety syringe; hence, it makes it easier to be adapted by the users due to its similarity, since no extra training is required. The cost should be equivalently low due to the similarity in size, design and number of components.

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45

Silva, Danilo Augusto Oliveira da, Denis Nascimento, Viviane Tabchouryde Barros Vieira, Luiz Augusto da Silva, Claudete Oliveira Kenvyn, and José Rubens de Camargo. "APLICAÇÃO DA TÉCNICA DE INSPEÇÃO BOROSCÓPICA EM BOMBA DE VÁCUO DE ANEL LÍQUIDO / APPLICATION OF THE BOROSCOPE INSPECTION TECHNIQUE IN LIQUID RING VACUUM PUMP." Brazilian Journal of Development 7, no. 3 (2021): 29717–25. http://dx.doi.org/10.34117/bjdv7n3-610.

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46

Britz, Alexander, Tadesse A. Assefa, Andreas Galler, Wojciech Gawelda, Michael Diez, Peter Zalden, Dmitry Khakhulin, et al. "A multi-MHz single-shot data acquisition scheme with high dynamic range: pump–probe X-ray experiments at synchrotrons." Journal of Synchrotron Radiation 23, no. 6 (October 10, 2016): 1409–23. http://dx.doi.org/10.1107/s1600577516012625.

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The technical implementation of a multi-MHz data acquisition scheme for laser–X-ray pump–probe experiments with pulse limited temporal resolution (100 ps) is presented. Such techniques are very attractive to benefit from the high-repetition rates of X-ray pulses delivered from advanced synchrotron radiation sources. Exploiting a synchronized 3.9 MHz laser excitation source, experiments in 60-bunch mode (7.8 MHz) at beamline P01 of the PETRA III storage ring are performed. Hereby molecular systems in liquid solutions are excited by the pulsed laser source and the total X-ray fluorescence yield (TFY) from the sample is recorded using silicon avalanche photodiode detectors (APDs). The subsequent digitizer card samples the APD signal traces in 0.5 ns steps with 12-bit resolution. These traces are then processed to deliver an integrated value for each recorded single X-ray pulse intensity and sorted into bins according to whether the laser excited the sample or not. For each subgroup the recorded single-shot values are averaged over ∼107 pulses to deliver a mean TFY value with its standard error for each data point,e.g.at a given X-ray probe energy. The sensitivity reaches down to the shot-noise limit, and signal-to-noise ratios approaching 1000 are achievable in only a few seconds collection time per data point. The dynamic range covers 100 photons pulse−1and is only technically limited by the utilized APD.

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47

Garofalo, Erik, Luca Cecchini, Matteo Bevione, and Alessandro Chiolerio. "Triboelectric Characterization of Colloidal TiO2 for Energy Harvesting Applications." Nanomaterials 10, no. 6 (June 17, 2020): 1181. http://dx.doi.org/10.3390/nano10061181.

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Nowadays, energy-related issues are of paramount importance. Every energy transformation process results in the production of waste heat that can be harvested and reused, representing an ecological and economic opportunity. Waste heat to power (WHP) is the process of converting the waste heat into electricity. A novel approach is proposed based on the employment of liquid nano colloids. In this work, the triboelectric characterization of TiO2 nanoparticles dispersed in pure water and flowing in a fluorinated ethylene propylene (FEP) pipe was conducted. The idea is to exploit the waste heat to generate the motion of colloidal TiO2 through a FEP pipe. By placing an Al ring electrode in contact with the pipe, it was possible to accumulate electrostatic charges due to the triboelectric effect between the fluid and the inner pipe walls. A peristaltic pump was used to drive and control the flow in order to evaluate the performances in a broad fluid dynamic spectrum. The system generated as output relatively high voltages and low currents, resulting in extracted power ranging between 0.4 and 0.6 nW. By comparing the power of pressure loss due to friction with the extracted power, the electro-kinetic efficiency was estimated to be 20%.

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48

Häre, Pierre. "Valveless Liquid-Ring Vacuum Pumps." Vakuum in Forschung und Praxis 19, S1 (April 2007): 24–27. http://dx.doi.org/10.1002/vipr.200790038.

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49

Rodionov, Yu V., Yu T. Selivanov, D. V. Nikitin, M. V. Sychev, and P. V. Kombarova. "Novel Construction of Liquid Ring Vacuum Pumps." Chemical and Petroleum Engineering 55, no. 5-6 (September 2019): 473–79. http://dx.doi.org/10.1007/s10556-019-00648-z.

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50

Zhang, Renhui, Lei Tian, Guangqiang Guo, and Xuebing Chen. "Gas-liquid two-phase flow in the axial clearance of liquid-ring pumps." Journal of Mechanical Science and Technology 34, no. 2 (February 2020): 791–800. http://dx.doi.org/10.1007/s12206-020-0127-2.

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