Research on the rotational inertia of radial piston pump and the optimization method of the pump parameters

The article reviews the possibility to improve efficiency of the cylinders block design and the pumping unit of an axial-piston hydraulic machine by means of utilization of inter-cylinder zones for installing additional chambers smaller in diameter. This design allows to building a new axial piston rotor double row hydraulic machine with two pumping units, which have not been used in hydraulic drives. It is required to increase in the outer diameter of the original cylinders block by only 10% that will provide an increase the working volume and power of the new hydraulic machine by 33%. The updated efficiency improvements do not only increase the working volume and power, but also increase the hydraulic motor acceleration without increasing the feed pulsation, angular velocity and torque on the shaft of the hydraulic machine under investigation. Keywordsdouble row rotary piston hydraulic machine; increased power; small feed pulsation; high power response I.

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“…For a hydraulic machine with an initial unit with seven cylinders, it is equal to 0.025, which is considered as acceptable value [25].…”

Section: The Performance Of a Two-row Rotary Piston Hydraulic Mamentioning

confidence: 99%

“…Amongst the range of rotary-piston double-and multi-row hydraulic machines, only units with multi-pampers radial-piston hydraulic motors and with various control systems are widely used [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Dual Row Rotary Piston Hydraulic Machine with Two Pumping Units

Gavrilin¹,

Нижегородов²,

Moyzes³

et al. 2019

Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)

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“…Water hydraulic radial piston pumps (RPPs) have the advantages of excellent anti-noise characteristics, low pulsation, and reduced leakage and are widely used to transmit high pressure and power in various industrial applications, [1][2][3] such as seawater desalination, descaling, and coal mining. According to the different drive ends, RPPs can be divided into two typical types 4 : rotary cylinder blocks and eccentric cams. Eccentric cam-type RPPs use different equipment to displace the piston, such as an eccentric camshaft, crankshaft, or polygonal shaft.…”

Section: Introductionmentioning

confidence: 99%

“…5 Manring and Williamson 8 conducted continuous studies to accurately obtain the mechanical and volumetric efficiencies of a Digital Displacement pump. Guo et al 3, 4, 7, 9 developed a spool-valve-distribution RPP and conducted a series of experimental, theoretical, and numerical studies to investigate its structural integrity, flow field of the discharge and suction circuits, dynamic characteristics, and flow ripple reduction. Li et al 6 proposed a direct-drive rotary cylinder block-type RPP and investigated an axial-flux permanent-magnet motor for the pump using the response surface method and a three-dimensional finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental validation of a valve-distributed water radial piston pump

Li,

Wei,

Liu

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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In underground coal mining, there is an urgent need for reducing the noise, hydraulic shock, and leakage of reciprocating pumps. Flow pulsation is strongly dependent on the number of pistons for single-acting reciprocating pumps. Water hydraulic radial piston pumps (RPPs) allow the pistons to be radially distributed, which makes the multi-piston design easier compared to traditional single-acting reciprocating piston pumps. In this study, a novel valve-distributed water RPP was developed in which the star wheel assembled on the camshaft is used to drive the connecting rod-crosshead-piston assembly and realize the reciprocation of the piston and suction-discharge of the pump check valves. Mathematical and numerical models representing the RPP were built using MATLAB and AMESim, respectively. Three-dimensional computational fluid dynamics analyses were performed to investigate the internal flow field of the suction and discharge circuits as well as the flow characteristics of the discharge valve opening. A prototype pump was manufactured and tested for 200 h and then disassembled to evaluate the wear condition. The tested instant flow rates were lower than those obtained from the theoretical and simulation analyses. The experimental results also revealed that the average flow rates were almost independent of the output pressure and that the volumetric efficiency decreased with increasing rotational speed when the output pressure was larger than 25 MPa. Inspecting the disassembled water RPP revealed that scuffing problems occurred in the pistons, whereas the other components remained intact. The findings of this study offer a reference for water hydraulic power units in various applications and for investigating the intensity of water hydraulics.

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High-torque axial-plunger hydraulic motor with phase control of the shaft rotation speed

Нижегородов¹,

Gavrilin

Moyzes

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The article reviews the design and parameters of high-torque axial-plunger hydraulic motor with phase control of the shaft rotation speed. This hydraulic motor is distinguished by a two-row eighteen-cylinder block and a rotary distribution disk with two rows of sickle-shaped distribution windows for supplying and discharging the working fluid. The hydraulic motor differs by a tripled displacement and torque from a similar hydraulic machine, which classifies it a high-torque hydraulic engines. Its power volume increases 1.6 times, and power response more than four times. At the same time, the fluctuation of the shaft rotation speed is measured by the corresponding value of the fluctuation coefficient equal to 0.0154. The phase control provides the hydromotor with a control range of 150…200 and more, while hydraulic motors with variable working volume range maximum 5. Therefore, the new hydraulic machine has a high potential for operating in hydraulic drives of machines.

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Research on the rotational inertia of radial piston pump and the optimization method of the pump parameters

Cited by 6 publications

References 5 publications

Dual Row Rotary Piston Hydraulic Machine with Two Pumping Units

Dual Row Rotary Piston Hydraulic Machine with Two Pumping Units

Design and experimental validation of a valve-distributed water radial piston pump

High-torque axial-plunger hydraulic motor with phase control of the shaft rotation speed

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