Papers by Keyword: Plunger

Abstract: The oil industry plays a key role in the global economy, providing raw materials and energy to various industries. The performance and reliability of pumping units in the oil industry are critical to ensure the smooth production of oil and gas. Pumpjacks in the oil industry are exposed to extreme conditions such as high loads, corrosion, aggressive environments and high temperatures. The study of technological factors that affect the performance and aging of these pumpjacks shows the development of specialized materials, designs and maintenance methods adapted to such conditions. Regular repairs, replacements or breakdowns of pumpjacks can result in significant operating costs for oil companies. The study of technological factors affecting the aging and performance of pumpjack helps to optimize maintenance processes and prevent unexpected breakdowns, which leads to lower operating costs. The performance of pumpjacks in the oil industry is directly related to the safety of personnel and the prevention of environmental accidents. Non-compliance of technological factors with safety requirements can have serious consequences, including accidents and environmental pollution. Considering the importance of the oil industry, its specific operating conditions, economic and environmental consequences, the study of the influence of technological factors on the performance and aging process of pumpjacks is of high relevance and a priority task for ensuring the efficiency and safety of operations in oil industry.

Abstract: The present study has been attempted to systematically perform a visualizing analysis plan which can improve the flow rate, velocity and mass flow rate as a function of the size of the welding section in the injector as a key for the determination of the injection amount and time of the fuel (CH₄) system for natural gas. As the setting conditions for the analysis, a minimum pressure of 2 bar and a maximum pressure of 8 bar were set to be the total pressure values in the case of the inlet, while 0 bar was set for opening drain to represent the state in the atmosphere in the case of the outlet. As a result, the characteristics with an increase in velocity could be affirmed as strong flow separation and eddy current were produced according to the model with a large size of welding section. An excellent performance with an improvement in the performance of velocity flow rate by about 40% could be affirmed in the model where the size of the welding section was designed to be 6 EA.

Abstract: The spherical distribution pairs of the plunger and the cylinder friction, has an important influence on the performance of spherical port plate axial piston pump. Based on the analysis of fluid viscosity change with pressure and temperature, considering friction differential pressure flow and shear flow, establishes the mathematics model of the friction pair of leakage. The simulation analysis using MATLAB software, the leakage flow rate is not proportional to pressure, but with the increase of pressure leakage flow was increased, and with the increase of pressure viscosity coefficient and temperature coefficient of viscosity, the leakage flow rate correction coefficient increases obviously, so in the choice of the hydraulic oil cylinder hole, should choose a relatively moving average leakage rate had no effect the piston ring slot.

Abstract: The effective thermal efficiency characteristics of the integrated piston-plunger pump were studied. The integrated piston-plunger pump integrated piston engine and plunger pump technology as a whole, making piston linear motion into plunger output water pressure energy. Compared with piston engine driving plunger pump system, the best effective thermal efficiency area and the best effective thermal efficiency characteristic curve was obtained. Under total working conditions, effective thermal efficiency was improved by 13.63-74.45% compared with piston engine driving plunger pump system. The same effective thermal efficiency level contained wider working conditions than the piston engine driving plunger pump system. The highest effective thermal efficiency of integrated piston-plunger pump under different throttles was between 19.91% and 28.88%, and the corresponding speed was about 1400 r/min.

Abstract: Die-casting plunger often fails due to serious wear on its cylindrical surface. The scrap of plunger used in large die-casting machine results in waste of materials and energy sources, and it is also against environmental protection. Therefore, the laser remanufacturing of die-casting plunger was studied in this paper. Both of the size and the performance of plungers were repaired by laser cladding surface modification using an iron-based self-fluxing alloy. The interface between original failed plunger and laser cladding layer showed a good metallurgical bond. The average thickness of laser cladding layer was 0.845 mm, and the average micro-hardness reached to 750 HV upwards. Microstructure in laser cladding layer was composed by the dendrite primary phase and the ledeburite organization. Iron (Fe), Chromium (Cr) and Molybdenum (Mo) elements were the main chemical compositions measured in laser cladding layer. The service life of laser remanufacturing plunger was nearly the same as the life of new plunger. However, its remanufacturing cost was only 50% of the new plunger’s. The laser remanufacturing technique is worth for extending and applying due to high cost performance.

Abstract: A new radial plunger pump is given here, which is installed with a roller between the plunger and the stator. When in working order, the roller is purely rolling on the inner face of the stator, reducing the friction force and effectively avoiding the combustion of friction pair. The force on the roller and the plunger of the static pressure supporting cylinder pair are studied here and some theoretical evidences are provided for developing new radial-plunger pumps of high speed, high efficiency, and long lifetime.