High Pressure Centrifugal Pump Research Articles

Experimental and Numerical Investigation on High-Pressure Centrifugal Pumps: Ultimate Pressure Formulation, Fatigue Life Assessment and Topological Optimization of Discharge Section

Experimental and Numerical Investigation on High-Pressure Centrifugal Pumps: Ultimate Pressure Formulation, Fatigue Life Assessment and Topological Optimization of Discharge Section

Numerical analysis of internal flow characteristics and energy consumption assessment in full flow field of multi-stage centrifugal pump considering clearance flow

In this paper, a seven-stage high pressure centrifugal pump for water injection was taken as the research object. The steady state full flow field was numerically simulated by unstructured grid and Renormalization Group (RNG) k- ε turbulence model, and the results were verified by experiment. The flow characteristics of each flow passage component in the centrifugal pump under rated flow condition were analyzed, and the influence of wear-ring clearance flow on the full flow field was studied. The entropy production theory was applied to compare the distribution law of full flow field with and without wear-ring clearance at rated flow. The range and magnitude of the main energy loss in the pump were quantitatively analyzed. The results show that the guide vane area has the highest entropy production, which is the main energy loss part of the centrifugal pump. The existence of wear-ring clearance increases the entropy production of full flow field and has an adverse effect. The impeller wear-ring clearance has a greater influence on the full flow field than the guide vane wear-ring clearance.

РАЗРАБОТКА ГАЛЬВАНИЧЕСКОГО ПОКРЫТИЯ С ИСПОЛЬЗОВАНИЕМ ДОБАВКИ ПРОИЗВОДНОГО РУБЕАНОВОДОРОДНОЙ КИСЛОТЫ ДЛЯ КОРПУСА ЦЕНТРОБЕЖНОГО НАСОСА

The article presents the results of a study of the process of obtaining a shiny nickel coating on steel from sulfuric acid electrolyte in the presence of an organic brightening additive - a de-rivative of rubeanhydric acid - under different modes of electrolysis. The expediency of using a nickel coating for corrosion protection of the housing of a high-pressure centrifugal pump has been substantiated

Investigation of the operating process of a high-pressure centrifugal pump with taking into account of improvement the process of fluid flowing in its flowing part

Centrifugal pumps are used in most industries. In particular, they are effectively used in the technological processes of oil production to create reservoir pressure at oil fields. Due to increasing demand for petroleum products, there is a need to improve such pumps to increase reservoir pressure by increasing their pressure. The research considered the possibility of improving the centrifugal pump impeller design by changing its blade system. It is theoretically possible to increase the pump head by changing the blade outlet angle at the impeller outlet β2 to 75°. The design of additional wedge-shaped blades of the second tier of the impeller was developed to reduce some additional hydraulic losses zones. They made it possible to stabilize the fluid flow in the impeller intervane channels, to reduce additional hydraulic losses. In the research, the impeller head was increased up to 26.7% for the proposed design impeller compared to the standard one. The research was performed with a comprehensive analysis of the pump installation life cycle cost. Thus, the development of new ones and the upgrading of pumping installations rooted in the industry with the aim of increasing the head is possible while achieving the minimum pump installation life cycle cost.

Design of new energy-saving and environmental protection harrow suction dredger system

This project is to design an adaptive new rake suction dredger operating system based on soil and terrain conditions. The design is combined with high pressure water gun cutting and new rake heads. Adaptive high pressure water guns are installed on both sides of the rake head. After the substrate is cut in blocks by a high-pressure water gun, the new rake head digs it up more easily and sucks it directly into the mud tank through a high-pressure centrifugal pump. The device has strong adaptability, environmental protection, energy saving and high efficiency, and has broad prospects for popularization and application.

Static calculation of the rotor unloading automatic machine for a high-pressure centrifugal pump

The article presents static calculation of an automatic machine for unloading of rotor axial forces in a high-pressure and high-speed pump. Analysis of the rotor displacement influence to values of mass flow rate and pressure in the unloading chamber of the unloading system is given. The main geometric parameters of the system are obtained.

An Investigation of Nonlinear Flow Oscillations in a High-Pressure Centrifugal Pump

High-pressure multistage pumps and their coupled piping systems, typically used in the process and power generation industry, can experience dangerous system-level instabilities. This can occur at flow coefficients well away from the surge limit and in the absence of cavitation. Such a pumping system and a related new kind of instability are the focus of this paper. A system-wide instability was observed at 0.05 times rotor frequency for flow coefficients near maximum head rise but at negative slope, thus on the stable side of the head rise characteristic. A previous study based on system-level experiments concluded that this instability differs from classical surge, cavitation surge, rotating stall, and rotating cavitation, but the underlying mechanism and necessary flow conditions remain unknown. This paper investigates the root cause of the system-wide pump instability, employing a systematic analysis of the impact of geometry changes on pump stability and performance. It is found that the upstream influence of the unsteady flow separation in the return channel leads to a time-varying incidence angle change on the volute tongue which causes periodic ingestion of low-stagnation pressure fluid into the diffuser passages. This sets up a limit cycle, promoting the system-wide instability. With the instability mechanism determined, the pump is redesigned to remove the flow separation while maintaining performance at design conditions. Unsteady numerical simulations demonstrate improved efficiency and pressure recovery at low flow coefficients. A time accurate calculation also indicates stable operation at all relevant flow conditions. The paper resolves a long-standing pump stability problem and provides design guidelines for reliable and improved performance, important to the chemical processing and power generation industry.

Enhanced seal to give improved pump reliability

Sundyne Corp. has introduced the Sunflo P-2500 high-pressure centrifugal pump to the company range of high speed pumps incorporating a number of new features to improve reliability.

Fabrication of the impellers of high-pressure centrifugal pumps using ceramic cores

Fabrication of the impellers of high-pressure centrifugal pumps using ceramic cores

高壓一段渦巻ポンプ導き羽根及び渦巻き室に就ての實驗

The efficiency of the centrifugal pump depends very largely on the efficiency of converting the kinetic energy of the water leaving the impeller into the pressure form. There are the two methods of enorgy-conversion generally adopted by designers of centrifugal pumps : one is to use the vortex or whirlpool chamber and the other the guide vane. And modern pump design appears to be tending to use the vortex chamber for low and medium types and the guide vane for high pressure type. The object of the experiments is to study if any variation in the efficiency and other characteristics of a high pressure centrifugal pump occurs, when fitted with guide vanes of different vane angle at entrance and divergent vortex chamber without guide vanes. This is the results obtained in each case. The comparison between the guide vanes and vortex. chamber is perhaps best seen from the attached figures. It would be generally stated that even for a high pressure centrifugal pump the good efficiency is obtainable from vortex chamber pump as from guide vane pump provided that a correct design of the vortex chamber is made, and also, that since the efficiency of the pump fitted with guide vane depends largely on the suitability of the vane angles, great care should be taken in the determination of the vane angle.