Theory Research on Full Metal Single Screw Pump

This paper first studied the feasibility in application and advantages of the the full metal single screw pump by the method of theoretical research . Then the paper deducted the motion characteristics of the rotor around the stator and flow rate of the metal single screw pump .It is pointed that the center of the rotor profile is always located in the long shaft of the section of stator in any section .As the rotor rotates, the center of the rotor profile on this section takes straight reciprocating motion along the long axis of stator section .The results indicate that it exists feasibility in the designing and processing of full metal single screw pump. Thereby it provides theoretical basis for the application of full metal screw pump.

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Investigation of Flow Rate and Viscous Dissipation in a Single Screw Pump-Extruder

International Polymer Processing ◽

10.3139/217.1663 ◽

2001 ◽

Vol 16 (4) ◽

pp. 323-333 ◽

Cited By ~ 13

Author(s):

G. A. Campbell ◽

C. Wang ◽

H. Cheng ◽

M. Bullwinkel ◽

M. A. te-Riele

Keyword(s):

Viscous Dissipation ◽

Flow Rate ◽

Screw Pump ◽

Single Screw

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Design and technological features of shaping of single-screw pump rotor profile

Chemical and Petroleum Engineering ◽

10.1007/bf02360237 ◽

1999 ◽

Vol 35 (12) ◽

pp. 791-793

Author(s):

V. V. Shatrov ◽

G. N. Gorshkov ◽

A. I. Lur'e ◽

V. K. Zal'tsberg ◽

A. V. Chadov

Keyword(s):

Screw Pump ◽

Pump Rotor ◽

Single Screw ◽

Rotor Profile

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Computational and theoretical research of the injector block function

MORSKIE INTELLEKTUAL`NYE TEHNOLOGII ◽

10.37220/mit.2020.50.4.051 ◽

2020 ◽

pp. 123-126

Author(s):

В.В. Кожемякин ◽

Р.А. Иванов ◽

Е.С. Игнатьева

Keyword(s):

Hydraulic Resistance ◽

Cross Section ◽

Flow Rate ◽

Pressure Dependence ◽

Theoretical Study ◽

Water Jet ◽

Theoretical Research ◽

Sudden Expansion ◽

Operating Modes ◽

Coefficient Of Hydraulic Resistance

Работа посвящена расчетно-теоретическому исследованию работы блока инжекторов. Рассмотрен пароводяной струйный аппарат, который применяется в качестве средства циркуляции теплоносителя первого контура. Подвод дополнительного потока осуществляется на цилиндрическом участке с внезапным расширением сечения через перемычку. Для достижения поставленной цели разработана программа для ЭМВ, в которой смоделирована зависимость давления от нагрузки в контуре, а также проведено расчетно-теоретическое исследование влияние гидравлического сопротивления на расход перемычки. В данной работе рассмотрены только рабочие режимы, т.е. все инжекторы работают как насосы. В ходе работы было установлено, что при нагрузке в 30% увеличиваются коэффициенты инжекции пароводяного струйного аппарата, но характер работы перемычек не меняется. Так же было установлено, что расход через перемычку меняется не пропорционально коэффициенту гидравлического сопротивления перемычки. The paper is devoted to the computational and theoretical study of the injector block operation. A steam-water jet apparatus is considered, which is used as a means of circulating the primary circle coolant. The additional flow is supplied on the cylindrical section with a sudden expansion of the cross-section through the bridge. To achieve this goal, a computer program was developed that modeled the pressure dependence on the load in the circuit, and also a theoretical study of the influence of hydraulic resistance on the flow of the jumper was conducted. In this paper, only operating modes are considered, i.e. all the injectors function as pumps. In the process of the research, it was found that at a load of 30%, the injection coefficients of the steam-water jet apparatus increase, but the nature of the work of the jumpers does not change. It was also found out that the flow rate through the jumper does not change in proportion to the coefficient of hydraulic resistance of the jumper.

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Research on the Impacts of Screw Speed on All-Metal Screw Pump

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.703.425 ◽

2014 ◽

Vol 703 ◽

pp. 425-429

Author(s):

Jun Fei Wu ◽

Zhi Li ◽

Fan Guo Meng ◽

Ben Liang Yu

Keyword(s):

Geometric Model ◽

Constraint Condition ◽

3D Flow ◽

Screw Speed ◽

Ansys Fluent ◽

Screw Pump ◽

Single Screw ◽

Dynamic Mesh Technique ◽

Fluent Software ◽

Mesh Technique

Compared with traditional screw pump,all-metal screw pump have more advantages in the oil extraction. In this paper, all-metal single screw pump's geometric model was made by PROE software; then the dynamic mesh technique was applied to mesh the model and constraint condition was applied in the ANSYS-FLUENT software. 3D flow field was numerical analyzed In that software, the impacts of screw speed on volume flow and volumetric efficiency were concluded, the conclusion can offer some valuable guidances to the all-metal single screw pump's design.

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3D Flow Simulation of a Twin-Screw Pump for the Analysis of Gap Flow Characteristics

Journal of Fluids Engineering ◽

10.1115/1.4051730 ◽

2021 ◽

Author(s):

Ali Hassannejadmoghaddam ◽

Boris Kutschelis ◽

Frank Holz ◽

Tomas Börjesson ◽

Romuald Skoda

Keyword(s):

Flow Rate ◽

Volume Flow Rate ◽

Overset Grid ◽

3D Flow ◽

Screw Pump ◽

Pump Performance ◽

Gap Flow ◽

Wide Range ◽

Twin Screw ◽

Pump Head

Abstract Unsteady 3D flow simulations on a twin-screw pump are performed for an assessment of the radial, circumferential and flank gap flow effect on the pump performance. By means of the overset grid technique rigid computational grids around the counter-rotating spindles yield a high cell quality and a high spatial resolution of the gap backflow down to the viscous sublayer in terms of y^+ < 1 . An optimization of the hole-cutting process is performed on a generic gap flow and transferred to the complex moving gaps in the pump. Grid independence is ensured, and conservation properties of the overset grid interpolation technique are assessed. Simulation results are validated against measured pump characteristics. Pump performance in terms of pressure build-up along the flow path through the spindles and volume flow rate is presented for a wide range of spindle speed and pump head. Flow rate fluctuations are found to depend on head but hardly on speed. By a profound assessment of the respective radial, circumferential and flank gap contribution to the total backflow, the importance of the most complex flank gap is pointed out. Backflow rate characteristics in dependence on the pump head and the pump speed are presented.

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Design of down-Hole Oil-Water Separation and Reinjection in the same Well System with Surface Driving Single Screw Pump

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.339.595 ◽

2011 ◽

Vol 339 ◽

pp. 595-602 ◽

Cited By ~ 1

Author(s):

Chuan Wei Zhao ◽

Zeng Liang Li

Keyword(s):

General Structure ◽

Environmental Benefits ◽

Screw Pump ◽

Water Separation ◽

Single Screw ◽

Innovative System ◽

Oil Water Separation ◽

Oil Water ◽

Oil Production Technology ◽

The Cost

Down-hole oil-water separation and reinjection in the same well system can reduce the cost of lifting the water and the ground pollution due to the treatment of production water, which can bring good economic and environmental benefits. By combining down-hole oil-water separation technology with surface driving single screw pump oil production technology, the author designed an innovative system of down-hole oil-water separation and reinjection in the same well. In this paper, the general structure, working principle and structure characteristics of the system are introduced. The structure composition and the connection method of each part are described, and the calculation method of basic parameters of the single screw pump in the system is given.

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Leakage Characteristic Identification of Labyrinth Seals on Reciprocating Piston through Transient Simulations

Mathematical Problems in Engineering ◽

10.1155/2019/3765732 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12

Author(s):

Lingzi Wang ◽

Jianmei Feng ◽

Mingfeng Wang ◽

Zenghui Ma ◽

Xueyuan Peng

Keyword(s):

Flow Rate ◽

Pressure Ratio ◽

Piston Compressor ◽

Pressure Change ◽

Labyrinth Seal ◽

Relative Molecular Mass ◽

Geometrical Parameters ◽

Leakage Flow ◽

Reciprocating Motion ◽

Leakage Flow Rate

In the reciprocating labyrinth piston compressor, the characteristic of the internal leakage is crucial for the leakage management and performance improvement of the compressor. However, most of the published studies investigated the rotor-stator system, and those who study the reciprocating piston-cylinder system basically focus on the effects of the geometrical parameters. These conclusions could not directly be applied to predict the real-time leakage flow rate through the labyrinth seal because of the fast reciprocating motion of the piston, which will cause continually pressure change in two compression chambers, and then the pressure fluctuation will affect the flow through the labyrinth seal. A transient simulation model employing the multiscale dynamic mesh, which considers the effect of the reciprocating motion of the piston in the cylinder, is established to identify the characteristics of the internal leakage. This model was verified by a specially designed compressor, and the influence of various parameters was analyzed in detail. The sealing performance decreased linearly with the increase in the pressure ratio, and higher pressure inlet leads to higher leakage flow under the same pressure ratio. The labyrinth seal performance positively correlated to the increase of the rotational speed. Leakage characteristics of five working mediums were carried out, and the results indicated that the relative leakage decreased with an increase in the relative molecular mass. From this study, the realistic internal leakage flow rate under different operating parameters in the reciprocating labyrinth piston compressor could be predicated.

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Design and Testing of a Linear-Driven Electro-Hydrostatic Actuator

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.4044474 ◽

2019 ◽

Vol 141 (12) ◽

Cited By ~ 2

Author(s):

Zimeng Wang ◽

Zongxia Jiao ◽

Xinglu Li

Keyword(s):

Flow Rate ◽

Rate Equation ◽

High Frequency ◽

Reciprocating Motion ◽

Series Of Experiments ◽

Spool Valves ◽

Design And Testing

Abstract This paper presents a novel hydrostatic actuator, which is named as linear-driven electro-hydrostatic actuator (LEHA). In an LEHA, the actuator is driven by a novel collaborative rectification pump (CRP), which incorporates two miniature cylinders and two spool valves. Specifically, the CRP is driven by two linear oscillating motors, which are designed and optimized to generate reciprocating motion at high frequency with adequate stroke. CRP offers a highly novel linear fluid pump with flexibility in bi-directionally driving. In this paper, schematic of LEHA is first presented and its kinematic flow rate equation is derived. Then the design of CRP, linear oscillating motor, as well as the whole LEHA prototype is introduced. Performance of the LEHA is demonstrated through a series of experiments and simulation, and analysis of the results is also included.

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