Sliding Vane Pump Research Articles

Structural design and cavitation performance research of single-acting sliding vane pump under high rotational speed and petroleum medium

In order to study the effect of the structural parameters of the sliding vane pump and the cavitation performance of the sliding vane pump, the computational fluid dynamics method was used to numerically simulate the internal flow field of the single-acting sliding vane pump. The calculation results show that the maximum local gas volume fraction of the pump with only one suction cavity and one discharge cavity is 1.54%, which is much lower than the cavitation volume fraction of other pumps, and the negative effect of cavitation is greatly reduced; as the number of the sliding vanes increases, The cavitation area of the sliding vane pump gradually decreases; when the rotor speed is 1500 r/min, the minimum and maximum local gas volume fraction of the sliding vane pump are 1.28% (the number of the sliding vanes is three) and 2.82% (the number of the sliding vanes is 6), respectively; the local gas volume fraction of the sliding vane pump with odd sliding vane is obviously smaller than that of the similar sliding vane pump with even number of sliding vanes, and the more the number of sliding vanes, the higher the gas content of the cavitation area of the sliding vane pump. Appropriately reducing the number of sliding vanes and selecting an odd number of sliding vanes can effectively improve the cavitation performance of the pump.

Design of Structure Parameters of Sliding Vane Pump Based on Lifting Characteristics

Abstract Limited by the harsh downhole working environment and its structural feature, the sliding vane pump (SVP), which is an all-metal artificial lift method considered to be widely used in thermal recovery well and high gas/oil ratio well, has not been widely applied as expected. To further improve the efficiency of SVP, this study explores how to optimize the structure parameters and the usage of the pump based on its lifting characteristics, in view of the stagnation in the development of SVP. The main results show that (a) optimization of the inlet (outlet) position parameters will bring effective pre-expansion (precompression) of each chamber once it enters the closed state, to avoid ineffective suction and high-pressure backflow. (b) The mathematical model of the pressure difference between the two sides of the vane at any position is derived by means of piecewise function. (c) Increasing the number of vanes can not only increase the mean value of instantaneous displacement but also shorten the discharge period and reduce the flow pulsation. Compared with the adjacent even number of vanes, the odd number of vanes has a more uniform instantaneous displacement. (d) A larger cross-sectional area of the rotor groove can result in a lower volume efficiency at the same gas–liquid ratio, and the effect of rotor groove on volume efficiency is more significant under high gas–liquid ratio conditions.

Mechanical analysis of radial hydraulic force in oil recovery by sliding vane pump

Due to the mechanical structure and operating principle of sliding vane pump (SVP), an all-metal artificial lift equipment with high temperature resistance and high pump efficiency, an unbalanced radial hydraulic force always exists in it during oil recovery, which will cause damage on efficiency, safety and service life of production system. What's more, the flow behavior of fluid through the pump cannot be accurately characterized because current related works fails to capture the influence of the force mentioned. To bridge this knowledge gap, in this paper, the computational fluid dynamics method was introduced and used to analyze the radial hydraulic force under different operating parameters for the first time. On this basis, novel measures to reduce this unbalanced force were put forward, and a design scheme of concentric stator-rotor to completely eliminate the radial hydraulic force was proposed. Main results show that a) increase in eccentricity will contribute to the enhancement of discharge capacity, which will simultaneously aggravate the radial hydraulic force. And this force is proportional to the fluid viscosity, lifting pressure difference and rotation speed. b) The direction of radial hydraulic force of adjacent stages in multistage SVP is opposite. To reduce this unbalanced force, it is recommended to use even-numbered (odd-numbered) multistage pump when the number of total stages is small (large). c) The concentric design eliminates the radial hydraulic force at the expense of the function of self-regulating flow rate. Besides, the stator curve under concentric stator-rotor condition will degrade the kinetic characteristic of vanes.

Experimental investigations on the working performance of a sliding vane pump in the electronic direct cooling system

In the two-phase electronic direct cooling system, the traditional centrifugal pump often has low efficiency, and it heavily suffers from the cavitation problem. To deal with this problem, a sliding vane rotary pump was developed and tested in a two-phase electronic evaporative cooling system, and the working performance was investigated and analyzed based on the experimental data. The effect of the suction port size was studied. In a two-phase cooling system, the volumetric efficiency decreased with the rotary speed. The discharge valve had no fatal influence on the stable working performance of the pump. However, it highly affected the volumetric efficiency in high rotary speed while it acted insignificantly in the low speed. A stable cooling result could be quickly obtained during the change of the heat flux with the driving of the sliding vane pump, and a minor dependence between flow rates was detected, which was caused by the pressure rise. Therefore, the sliding vane pump was able to be an alternative pump for the two-phase electronic direct cooling system.

Theoretical and experimental control strategies assessment of a Sliding Vane Oil Pump

To date, Sliding Vane Pump (SVP) technology is one of the most attractive solution in different technical applications thanks to its reliability and compactness and capability to keep a high efficiency even when it is working far from rated condition. In particular, this feature makes the SVP suitable to be employed for the oil circulation (SVOP) in Internal Combustion Engine (ICE) which is characterized by a wide oil flow rates variation, delivered pressure and temperature variation which causes operating conditions of the pump far from the design point. Flow delivered changes in these machines are produced by varying the eccentricity for a mechanical connection with the engine - or by varying the speed of revolution. The mild hybridization of the powertrains calls for a strong development of electrically assisted engine auxiliaries which undoubtedly makes the flow variations easier to be done, but the presence of an electric motor requires some technological choices not fully assessed, a cost increase and a reliability decrease. The paper presents a mathematical model of a SVOP for oil circulation in ICE, suitably validated by a wide experimental activity. The model integrates a mono and zero-dimensional fluid-dynamic analysis and allows to represent the intimate behaviour of the machine. Moreover, it was employed as virtual platform to discuss pros and cons of different flow rate variation strategies and their effect on the efficiency of the SVOP.

FLOW MODELLING AND PERFORMANCE ASSESSMENT OF ROTARY SLIDING VANE PUMP USING COMPUTATIONAL FLUID DYNAMICS

A pump is a mechanical device that converts mechanical energy into hydraulic energy. The aim of the current work is to examine the behavior of fluid flow inside a rotary sliding vane pump and assessing the performance by studying the effect of change of the rotational speed, number of vanes and the radial clearance gap size between vane tips and stator surface on the performance of the pump. The commercial finite-volume solver ANSYS Fluent was used to simulate flow behavior in the pump with an additional C source code for the description of the dynamic mesh motion. Pump flow has been studied using lubricating oil, 5W-30, as the working fluid. Several computational configurations were used for the numerical simulation. The numerical results showed that 100% increase of the number vanes decreases the overall efficiency by 46.5%, while increasing the clearance gap size from 0.025 to 0.05 decreases the overall efficiency by 9.72%, and results in a 42.85% increase in the internal leakage within the pump.

Design and analysis of a sliding vane pump for waste heat to power conversion systems using organic fluids

The current research work assesses the relevance of pumping work in energy recovery systems based on bottoming Organic Rankine Cycles (ORC) and presents the development of a sliding vane pump prototype for small scale units. The novel device was installed on an ORC-based power unit for waste heat to power conversion in compressed air applications in which the heat source was a compressor lubricant while the heat sink was tap water. Tests were performed with R236fa as working fluid at different pressure rises (3.9–9.7) and revolution speeds (500–1300RPM). The experimental dataset was used to validate a numerical one-dimensional CFD model of the sliding vane pump developed in the GT-SUITE™ environment. The model takes into account the fluid dynamics and friction phenomena that are involved in the pump operation such as vane filling and emptying, leakages as well as dry and viscous friction between components in relative motion. The modeling platform was further exploited to retrieve performance maps of the pump, angular vane pressure evolution as well as to break down leakage and friction losses. The effects of geometrical features on the pump performance were eventually investigated through variations of the aspect ratio. With reference to the best experimental operating point (pressure rise 9.7, revolution speed 1250RPM), simulations showed that, with a stator 5% bigger than the nominal one and an axial length almost halved, overall pump efficiency could be increased from the experimental 36.9% to a value of 48.0%

Modeling and Experimental Activities on a Small-scale Sliding Vane Pump for ORC-based Waste heat Recovery Applications

Abstract Pumping work in energy recovery units based on Organic Rankine Cycles (ORC) can severely affect the net power output recovered. Nevertheless, in recent years scientific andindustrial communities mainly focused on expanders’ development. In order to address this lack of know-how and equipment, the current paper presents the development of a positive displacement ORC pump based on the sliding vane rotary technology. The machine was installed in a power unit for low-medium grade thermal energy recoverythat operated with oil at 70-120C as upper thermal source and tap water as lower one. Working fluid was R236fa while cycle pressure ratio ranged from 2.8 to 3.7. The ORC pump was also tested at different revolution speedssuch that mass flow rate varied between 0.05kg/s and 0.12kg/s. These experimental data were further used to validate a comprehensive one-dimensional model that takes into account fluid dynamic filling and emptying processes, closed vane transformation and leakages at blade tip, rotor slots and end walls clearances. Viscous and dry friction phenomena occurring between components in relative motion were additionally considered. A full operating map of the sliding vane pump was eventually retrieved to explore multiple off-design operating conditions. The parametric and modular structure of the model will act as a design platform to outline enhanced ORC sliding vane pump prototypes.

Simulation and Testing of the Hydraulic Performance of the Sliding Vane Pump

Summary A new all-metal sliding-vane pump (SVP) and matching lift system were developed as an alternative to the low efficiency and poor high-temperature performance of conventional artificial-lift systems. Numerical simulation and laboratory tests were used to conduct a comparative study of the hydraulic performance of the pump. The effects of pump-lifting-pressure difference and rotational speed on pump rate and efficiency were studied. The test results showed that, if the rotation speed is fixed, the pump rate and efficiency will decrease with an increase in required pressure difference. With a constant pressure difference, the flow rate can be controlled by varying the pump speed. On the basis of computational fluid dynamics (CFD) and finite-element-method (FEM) numerical simulation, a numerical model of the SVP was created. The pressure and fluid-flow distribution in the vane pump were determined under zero pump-pressure-difference condition, which helped realize the working principles of the pump. The simulation results agreed well with the test results, thus validating the reliability of the numerical models in this paper.

Fuel Economy Benefits of a New Engine Cooling Pump Based on Sliding Vane Technology with Variable Eccentricity

During a homologation cycle, engine cooling pump operates at off-design conditions that are characterized by low efficiency and, in turn, impacts on the vehicle fuel economy and emissions performances. Furthermore, the conventional centrifugal technology struggles with the need of implementing thermal management strategies. In order to address these issues, the current paper presents the development of an innovative engine cooling pump for automotive applications that is based on the sliding vane technology. The experimental performances of the novel pump were compared with the ones of a conventional centrifugal device through a test bench that reproduced the real operating conditions of a passenger car engine cooling circuit. Characteristic curves and efficiency maps were further used as input data for a comprehensive model that takes into account heat transfer and hydraulic phenomena of a real engine cooling circuit. The simulation platform was eventually used to assess the energy benefits of the sliding vane pump over a centrifugal machine along the Worldwide harmonized Light vehicles Test Cycle (WLTC) with respect to a fixed geometrical configuration and an optimized one achieved through a control on the eccentricity between stator and rotor that tuned up the flow rate on the cooling demand. A mechanical power reduction of 12% was estimated for a sliding vane pump mechanically linked to the engine crankshaft while the benefits reached 22% if the eccentricity actuation was considered. In terms of CO2 reduction, the benefits related to the introduction of the sliding vane pump are of about 0.5g/km.

English

English

Trio hails fuel delivery 40-year success story

In the north-east of the United States, a transportation business, a pumps manufacturer and its supplier have worked closely together to succeed. For the Dennis K Burke fuel delivery company of New England, business life has been made easier with the help of Blackmer TXD Series Sliding Vane Pumps. Supplier Hall Trask Equipment has also played a vital role in the four-decade partnership that has proved fruitful for all concerned.

Конструкторско-технологические разработки по повышению срока эксплуатации гидронасоса

The article presents the results of design research authors for converting sliding vane pumps marine high-speed diesel engines to improve their efficiency and reduce energy losses in operation. For this proposed new design of the friction stator plate to convert sliding friction into rolling friction, due to the installation in the groove of the plate roller, rotating between the stator and plate. The results of laboratory and field tests showed that the reduction of the power consumption of the pump reduces fuel consumption by half, compared with regular pump design.

Artificial lift technique of multistage sliding vane pump used in thermal production well

Abstract For low efficiency and poor high-temperature resistant performance of the conventional artificial lift systems, a new sliding vane pump and the matched lift system were designed, and the pump property study, field test and economy analysis were conducted. The redesign of flow direction reduces the pump's radial size and the design of series connection makes higher pumping pressure possible with lower revolution speed. By building pump characteristics models and doing laboratory experiment, it is found that the pump has steady hydraulic and mechanical characteristics, good no-load and heavy-load characteristics, and high system and volume efficiencies. The artificial lift system, including oil tube, sucker rod, transmission cylinder and anchor, was designed in reference to the progressive cavity pump (PCP) artificial lift system. The pump was tested in five wells and compared with other common lift equipment in energy consumption, high-temperature resistant performance and investment. The new artificial lift technique features its high efficiency, high temperature resistance, low investment and good adaptability.

Experimental Study on Series Operation of Sliding Vane Pump and Centrifugal Pump

A platform for sliding vane pump and centrifugal pump tests is installed to study the series operation of them under different characteristics of pipeline. Firstly, the sliding vane pump and the centrifugal pump work independently, and the performance is recorded. Then, the two types of pumps are combined together, with the sliding vane pump acting as the feeding pump. Comparison is made between the performance of the independently working pump and the performance of series operation pump. Results show that the system flow rate is determined by the sliding vane pump. In order to ensure the stability of the series operation pumping system, the energy consumption required by the pipeline under the system flow should be greater than the pressure energy centrifugal pump can generate. Otherwise, the centrifugal pump can not operate stably, with reflux, swirl, gas-liquid two-phase flow in the runner and strong vibration and noise. The sliding vane pump can be in serial operation with the centrifugal pump under limited conditions.

New level of green for seal-less drive

Seal-less drives, together with sliding vane pumps, take the drive to reduce energy consumption and increase environmental protection without sacrificing performance to a new level. Mouvex's Paul Cardon says that these technologies provide significant advantages over gear pumps in the quest to reduce energy consumption and cost.

Blackmer sliding vane pumps upgraded with new seals

Blackmer sliding vane pumps upgraded with new seals

Optimization of geometry of working chamber of sliding-vane pump with circular stator

Optimization of geometry of working chamber of sliding-vane pump with circular stator

Vakuumpumpen in der Verfahrenstechnik

AbstractVacuum pumps in chemical engineering. Applications of vacuum pumps in chemical engineering are numerous. After a general systematization of the working principles of vacuum pumps, the most important types – liquid ring vacuum pumps, sliding vane vacuum pumps, and ejectors – are discussed with regard to their development and their working principle. Attention is focussed on aspects which allow a comparison of the advantages and disadvantages of vacuum pumps. A systematic survey of the criteria leading to the selection of a certain type of pump show that these criteria may be based on the process as a whole or on environmental and safety considerations as well as economic aspects. In areas where liquid ring vacuum pumps, sliding vane vacuum pumps, and ejectors may be applied the extent to which the pumps fulfill these criteria is shown. In this context, a comparison of the liquid ring pump and the sliding vane pump is of special interest. The doubts recently publicized concerning the environmental compatibility of liquid ring vacuum pumps are shown to be groundless if the pumps are installed correctly. Great care must be taken comparing the economic aspects of liquid ring pumps and sliding vane pumps.

The construction and use of a portable volumetric spore trap

For sampling air-borne spores a portable volumetric trap (which impacts spores down to 4μ diam. on a stationary glass slide for microscopic examination) is operated manually by a light sliding-vane pump. Samples of from 50 to 100 l. are taken in from 5 to 10 min. The apparatus can be used in places where a power supply, required for operating an automatic spore trap, is not available. Tests show it to be suitable for use in high spore concentrations, and in circumstances when an accurate time differentiation between samples is required. It is unsuitable for continuous operation.