The Experts below are selected from a list of 4470 Experts worldwide ranked by ideXlab platform
Na Cheng-lie - One of the best experts on this subject based on the ideXlab platform.
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Investigation of transit flow in double-Acting Pump with composite vanes
2004Co-Authors: Na Cheng-lieAbstract:Aimed at the compressibility of working medium in Pump and taking into account the process of pre-loading and pre-unloading as well as the damping action of vibration-reducing slot in exampled VQ45 Pump, the simulation of transit flow in double-Acting Pump with composite vanes is conducted and, then, the unevenness coefficient of flow is computed. It is found finally that the origin of flow oscillation in double Acting Pump with composite vanes is rested with the Pump working pressure and elastic modulus of the working medium.
Subban Chinnaiah - One of the best experts on this subject based on the ideXlab platform.
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Design and analysis of quad-Acting reciprocating Pump: A novel approach
2014Co-Authors: Veeramalai Chinnasamy, Sathish Gandhi, R. Kumaravelan, S. Ramesh, Kumar Naveen Kumar, Subban ChinnaiahAbstract:SUMMARY Reciprocating Pumps are those in which the oscillating motion of pistons, plungers or membranes causes a fluid to move. The discharge of a single-Acting reciprocating Pump is low compared with a double-Acting one for the same input power. In this respect an attempt has been made to increase the discharge by making some modifications in the double-Acting Pump with the same input power. Two additional pistons have been placed vertically and adjacently to the main cylinder. The fluid flow analysis of four quad-Acting reciprocating Pump has been performed in ANSYS FLUENT V12. The various parameters such as mass flow rate of fluid flow, velocity of the fluid flow, volume of the fluid flow and force of the fluid flow have been considered in this paper. These parameters have been studied for each cylinder in an outlet to determine the performance of the Pump. The results show that, using the same input power used for the double-Acting reciprocating Pump, the total discharge of fluid of the four-Acting Pump has been increased.
Jeroen Van Wittenberghe - One of the best experts on this subject based on the ideXlab platform.
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Failure investigation and redesign of piston- and Pump shafts
Engineering Failure Analysis, 2009Co-Authors: Wouter Ost, Patrick De Baets, Jeroen Van WittenbergheAbstract:Abstract For the application of glue during the production of cars, a double-Acting Pump driven by a pneumatic piston is used. The shafts of the Pump and the pneumatic piston are fixed to each other with a C-shaped split bush, which fits over a groove in both the Pump and the piston shaft. A number of piston- and Pump shafts failed prematurely at the location of the coupling. Following the first fractures, all shafts in use were subjected to a magnetic particle inspection and cracks were found in a large number of them. From the fracture investigation it was shown that the shafts failed due to the propagation of a fatigue crack, starting from a bottom radius of the groove for the coupling bush, caused by cyclic loading during operation. No major initiating defects could be found. The corner radius of the groove was found to match the drawing of the manufacturer. From the investigation of the material it was found that two different materials (42CrMo4 and C45E) were used for the production of the shafts, which matches the materials specified by the manufacturer. The loads Acting on the shafts during operation were checked using strain gauges, and found to be inside the design range of ±45 kN. Using a stress method it was shown that C45E steel was inadequate for this application and that even with 42CrMo4 steel, more care had to be taken in the surface finish of the corner radius. Two new shafts were produced from 42CrMo4 steel, with a polished (instead of turned) bottom radius. These shafts were subjected to a fatigue test of 2 million load-cycles with load varying between +45 and −45 kN (constant amplitude test). Both shafts were able to withstand this load without failure. The shaft design has been changed and no further shaft fractures have occurred.
Amor - One of the best experts on this subject based on the ideXlab platform.
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Computer Simulation and Test-bed Performance of Single- and Double-Acting Solar-thermal Water Pumps
1994Co-Authors: Jk Raine, Foster, AmorAbstract:This paper describes the design, computer simulation and performance of a single-Acting double-diaphragm solar-powered water Pump, and a later double-Acting design offering a more compact layout, higher output and potentially greater reliability. The design of the prototype Pumps has been based on low cost manufacture, simplicity, and reliability. The working fluid is n-pentane in both cases. The second Pump is designed to be ideally suited for water circulation in solar-powered heating systems for swimming pools. In these diaphragm Pumps useful work is done during the evaporation and condensation stages of the Rankine cycle, but there is a large exergy loss during an unresisted expansion which precedes condensation. Pump efficiency is therefore low, but this is typical of low cost non-steady flow devices where there is no expansion work done on a piston or turbine. Laboratory test results are presented for the first Pump on n-pentane. Results of a computer simulation of the second Pump are described, together with initial performance tests done with compressed air. These results indicate that the double-Acting Pump is likely to meet its computer-predicted performance.
Zeng Ping - One of the best experts on this subject based on the ideXlab platform.
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Experimental research on double-Acting piezoelectric Pump
Journal of the Harbin Institute of Technology, 2009Co-Authors: Zeng PingAbstract:The performance of a double-Acting piezoelectric Pump with one actuator,double chamber and four valves is studied. The structure and working principle of the Pump are explained. A prototype Pump is fabricated with organic glass. The Pump is tested with water as the working solution. The influences of the working mode of actuator and the member of working chambers are experimentally explicated. Test results show that the output capability of the double-Acting Pump is better than that with a single chamber Pump when the frequency is under 40 Hz,the efficiency of mechanical transform can be increased for the double-Acting Pump and there is no pulsatile phenomenon during the working. The maximum flowrate achieved is up to 785 mL/min and the pressure obtained is 14 kPa at the applied voltage of 100 V at 20 Hz. Experimental results and analyses provide a basis for the design and development of valvular piezoelectric Pump.
