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Journal articles on the topic 'Piston units'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Aslanyan, A. E. "Influence of pressure distribution in the gap of piston-cylinder unit and properties of working fluid PES-3 on characteristics of high pressure piston-cylinder unit." Izmeritel`naya Tekhnika, no. 10 (2020): 38–42. http://dx.doi.org/10.32446/0368-1025it.2020-10-38-42.

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A simulation of the use of PES-3 liquid in a high-pressure piston-cylinder units was performed, and the parameters of the piston-cylinder units were determined in the article. The equations of the mathematical model describing the pressure change in the gap between the piston and the cylinder are given. As a result of the calculations, the pressure distributions in the gap between the piston and the cylinder are determined at under piston pressures less than 1.6 GPa. The profiles of the gaps between the deformed piston and cylinder at different under piston pressures are calculated. The depend

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2

VATHEUER, Nils, Hubertus MURRENHOFF, Ulrich BRÄCKELMANN, and David BREUER. "Mechanical Losses in the Piston-Bushing Contact of Axial Piston Units." JFPS International Journal of Fluid Power System 8, no. 1 (2014): 24–29. http://dx.doi.org/10.5739/jfpsij.8.24.

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3

Mukmin, Muhammad Amirul. "ANALISIS KEANDALAN DAN PENENTUAN PERSEDIAAN OPTIMAL SUKU CADANG COMPRESOR TWO STAGE FOR VESSEL IQF DENGAN METODE ABC DAN RELIABILITY DI PT.KELOLA MINA LAUT." MATRIK (Jurnal Manajemen dan Teknik) 17, no. 1 (2017): 38. http://dx.doi.org/10.30587/matrik.v17i1.161.

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The Production process PT. Kelola Mina Laut has often had obstacles of not working operation of production systems ( production stop because of the problem at bottleneck or breakdown ). This happens because the breakage production machine or waiting for engine unit/component ordered and purchased to replace the faulty component. Especially on machine compressor two-stage no 6 for vessel IQF 4 So it required that the optimal inventory control of spare parts. The method used for the determination this component is the ABC classification method and the method Reliability. ABC obtained by the meth

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4

Бас, Олександр Анатолійович. "Structural and metrological aspects of piston-type gas-measuring units (gas piston prover)." Technology audit and production reserves 1, no. 4(15) (2014): 11. http://dx.doi.org/10.15587/2312-8372.2014.21688.

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5

Cui, Yan, Tong Jiang, and Hongfei Hou. "A Novel Isothermal Compressed Air Energy Storage System Based on Cooperative Operation of Two-Stage Liquid Piston Units." Energies 18, no. 12 (2025): 3184. https://doi.org/10.3390/en18123184.

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The transition toward a renewable-based energy structure has significantly accelerated the advancement of energy storage technologies. Compressed air energy storage (CAES) is regarded as a highly promising long-duration energy storage solution due to the advantages of its large scale and long service life. However, the efficiency of conventional compressed air energy storage (CAES) systems remains limited due to the inadequate utilization of thermal energy. Isothermal compressed CAES (ICAES) technology, based on liquid pistons, can overcome the efficiency bottleneck by enabling temperature con

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6

Yusha, V. L., G. I. Chernov, I. D. Obukhov, et al. "Multipurpose conversion of marine diesel engines when creating piston motor-compressor units." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 5, no. 3 (2021): 14–22. http://dx.doi.org/10.25206/2588-0373-2021-5-3-14-22.

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This paper present an assessment of the energy efficiency of various combinations of piston stages of an internal combustion engine, a compressor, and a Rankine engine as part of piston motor-compressor units based on modernized marine diesel engines. An eight-cylinder single-row diesel engine 8Ch23/30-1 is chosen as the object of research, the base of which is used as a single platform for creating powertechnology units for various purposes and power. The proposed variants for converting the original engine allow, with minimal costs for the development of design and manufacturing technology,

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7

Ivanov, Sergei, Kristina Safronchuk, and Yuri Olt. "Justification and selection of design parameters of the eccentric gear mechanism of the piston lubrication and filling unit for the mining machines maintenance." Journal of Mining Institute 248 (May 25, 2021): 290–99. http://dx.doi.org/10.31897/pmi.2021.2.13.

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Piston pumps are widely used in the lubrication systems of mining machines. When carrying out technical maintenance (MOT), including lubrication and filling works, at the site of operation of mining machines due to the remoteness from repair shops and warehouses of fuels and lubricants (FAL), mobile repair shops (MRS), maintenance units (MU) and mechanized filling units (MFU) are used. The specificity of carrying out maintenance is to create conditions for the supply of oils, working fluids and lubricants to the corresponding systems of mining machines for their refueling. Existing piston pump

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8

Berdnik, A. N. "USING SIMILARITY THEORY IN MODELING THERMOGASODYNAMIC PROCESSES IN SUPERCHARGING UNITS OF A PISTON ENGINES." Spravochnik. Inzhenernyi zhurnal, no. 336 (March 2025): 29–35. https://doi.org/10.14489/hb.2025.03.pp.029-035.

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The features of physical modeling of processes in turbo compressors of piston engines on the “cold model” are considered. A system of criteria for thermogasodynamic similarity is presented in terms of the necessary minimum criteria to ensure the similarity of processes in turbine and compressor of a piston engines.

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9

Yusha, V. L., S. S. Busarov, A. V. Nedovenchanyi, and M. V. Silkov. "An Analysis of the Influence of the Linear Hydraulic Drive Regulation Law on the Energy and Dynamic Characteristics of a Single-Stage Compressor Unit." Proceedings of Higher Educational Institutions. Маchine Building, no. 11 (716) (November 2019): 26–35. http://dx.doi.org/10.18698/0536-1044-2019-11-26-35.

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The significant unevenness of the instantaneous power of a piston compressor unit during its operating cycle creates certain problems in the selection and operation of drive engines, which are usually solved by installing a flywheel. In single-stage compressor units with linear drive based on low-speed long-stroke stages, the amplitude change in the gas force during the operating cycle is significantly higher compared to similar compressor units. This leads to such an increase in the amplitude change of the instantaneous power of the drive, that the use of a flywheel becomes impractical. The a

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10

СВІДЕРСЬКИЙ, ВЛАДИСЛАВ, та ГЕННАДІЙ СІРЕНКО. "ПІДВИЩЕННЯ ЗНОСОСТІЙКОСТІ ПАРИ ТЕРТЯ ПОРШЕНЬ-ЦИЛІНДР НАСОСУ АВТОМИЙКИ ВИСОКОГО ТИСКУ". Herald of Khmelnytskyi National University. Technical sciences 349, № 2 (2025): 393–97. https://doi.org/10.31891/2307-5732-2025-349-57.

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The analysis of the operation of the high-pressure car wash and the axial piston pump included in its composition was performed. The pump body is usually made of any metal or alloy (for example, aluminum or stainless steel), and the pistons are made of specially hardened steel. Since such units have a short service life, the question of their motor resource is quite relevant. In professional car washes, pistons made of metal ceramics and heat-resistant composite polymer materials are promising. The choice of material for replacing the base material of the axial pump piston is justified. Accord

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11

Xiao-Bo Dong, Xiao-Bo Dong, Xiang-Yun Yi Xiao-Bo Dong, and Zhi Zhang Xiang-Yun Yi. "Research on the Application of AGV Scheduling Strategy in Improving the Efficiency of Intelligent Manufacturing of Vehicle Parts." 電腦學刊 35, no. 2 (2024): 269–83. http://dx.doi.org/10.53106/199115992024043502017.

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<p>With the development of intelligent manufacturing and the upgrading of industrial structure, all industries are facing the transformation and upgrading towards refined and efficient production models. This article takes engine piston and connecting rod as the research object. Firstly, the production process of piston and connecting rod is analyzed, and then the corresponding processing equipment is listed. Then, the layout design of the piston and connecting rod workshop is completed according to the layout standards of the intelligent workshop; Secondly, the transportation problem of

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12

Andriani, Devi, Wahyono Suprapto, Yudy Surya Irawan, and Alfeus Sunarso. "PENGARUH TEMPERATUR CETAKAN TERHADAP STRUKTUR MIKRO DAN KEKERASAN PISTON HASIL PENGECORAN MENGGUNAKAN 3D PRINTING." Jurnal Rekayasa Mesin 14, no. 1 (2023): 171–79. http://dx.doi.org/10.21776/jrm.v14i1.1136.

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Motorcycle users in 2019 reached 133,617,012 units in Indonesia. The impact of a large number of motorcycle certainly attracts the interest of the industry to produce two-wheeled automotive vehicles. The piston is part of the engine that functions as a compression barrier in the combustion chamber, the piston material is aluminum alloy. Therefore, research was carried out on making pistons with investment casting methods, physical and mechanical patterns from 3D printers on pistons. This research starts from drawing the piston using CAD (computer-aided design), making a printed pattern from a

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13

Faіtar, Catalіn, Liviu-Constantin Stan, and Nicolae Buzbuchi. "Performance and reliability of exhaust gas recovery units for marine engines." Technium: Romanian Journal of Applied Sciences and Technology 4, no. 8 (2022): 23–32. http://dx.doi.org/10.47577/technium.v4i8.7262.

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Although the marine diesel engine market is dominated by slow-coupled two-stroke engines with a direct coupling system and a crossover system or four-stroke engines with medium or high speeds, equipped with a reversing system, there is a hybrid variant that has always been used by the market in Japan and East Asia, especially by coastal or fishing operators. These are four-stroke slow engines. These types of engines are a specialty specific to the Japanese profile industry, being characterized by a simple and robust construction and fairly long piston strokes. The rated speeds of these motors

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14

Raffai, Peter, Pavel Novotný, and Jozef Dlugoš. "Computer Simulation of the Behavior of the Piston Ring Pack of Internal Combustion Engines." Applied Mechanics and Materials 821 (January 2016): 166–71. http://dx.doi.org/10.4028/www.scientific.net/amm.821.166.

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The continuously tightening regulations limiting the amount of exhaust gas components of internal combustion engines force the manufacturers to further increase the effectivity of their power units. Due to the already relatively highly-developed state of engines result in the need of research and development of even smaller engine parts – e.g. piston rings. The main aim of this project was to develop a tool for the computer simulation of the behavior of the piston ring pack, which could aid the optimization process of the piston ring pack towards lowered friction losses.

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15

Milovzorov, Georgy, Aleksei Ilyin, and Pavel Shirobokov. "Diagnostics of the condition of sucker-rod pumping units after the analysis of dynamogram cards." MATEC Web of Conferences 298 (2019): 00137. http://dx.doi.org/10.1051/matecconf/201929800137.

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Despite of the increased share of oil wells equipped with submersible electrical centrifugal pumps, a considerable part of them is equipped and operated with sucker-rod pumping units. When operating wells with sucker-rod pumping units, different plunger pumps are used. The rod string is operated in severe environment due to long contact with highly corrosive well products and time-variant loads. Taking into account all acting loads, the diagnostics of the condition of sucker-rod pumping units is a difficult task. At the majority of oil fields in Russia, the operation of wells equipped with suc

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16

Aliyev, Balakhan Haji oglu, and Mirilham Mirintigam oglu Hasanov. "Development of a Technological Process for the Production of Diesel Engines with Wear-Resistant Metallized Coating of Piston Heating Units." Engineering and Technology Journal 10, no. 04 (2025): 4501–9. https://doi.org/10.5281/zenodo.15229112.

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The article shows that in most cases the reason for rejecting piston compression rings and cylinder liners is reaching the limit wear of the working rubbing surfaces and a conclusion is made about the advisability of applying a coating of a mixed steel-bronze pseudo-alloy to the working surface of the piston rings. The results of tribotechnical tests of a number of pseudo-alloys are presented, on the basis of which the optimal coating of piston rings is selected. The advisability of chemical-thermal treatment of metallization coatings is proven and the technological process of manufacturing pi

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17

Воронов, Сергей, Sergey Voronov, Вероника Гаврилова, and Veronika Gavrilova. "RELIABILITY INCREASE IN HIGH-DYNAMIC AXIAL-PISTON HYDROMACHINES." Bulletin of Bryansk state technical university 2016, no. 4 (2016): 170–79. http://dx.doi.org/10.12737/23210.

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At present time there is a trend of specific power increase in axial-piston hydromachines (APHM) that results in increase, volumetric and mechanical losses loads and servicing characteristics decrease. It requires a corresponding reliability increase in hydromachines of this type. Basic reasons of capacity loss and APHM ser-vicing characteristics decrease are sliding couples: a cylinder block – edge distributor, pistons-cylinders walls. Nonmetallic antifriction materials used for manufacturing coatings of interacting surfaces in parts are considered most promising for manufacturing

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18

Mytrofanov, O., and A. Proskurin. "Analysis of Efficiency of Rotary Piston Engines Use at Power Plants for Surplus Electrical Energy Accumulation." Problemele energeticii regionale 4, no. 48 (2020): 58–68. https://doi.org/10.5281/zenodo.4317046.

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This article is devoted to the methods for enhancing the power plants’ efficiency in accumulation of a surplus electrical energy obtained using the renewable energy sources. The study is aimed at analyzing the efficiency of perspective power plants for accumulation of the surplus electricity in the form of compressed air based on rotary piston engines. To achieve the goal a comparative analysis of efficiency of diabatiс and adiabatic schemes of the electric energy storage was performed. The analysis was found to reveal the major advantages and disadvantages, along with the design feature

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19

NURALIN, Beket, Murat KUANYSHEV, Akhmet MURZAGALIEV, Altynbek KAUKAROV, and Isatai UTEBAYEV. "EVALUATION OF THE RATIOS OF THE MAIN INDICATORS OF THE DRY SEALING OF THE CYLINDER-PISTON GROUP OF INTERNAL COMBUSTION ENGINES USING A SOLID LUBRICANT." Transport Problems 17, no. 3 (2022): 109–21. http://dx.doi.org/10.20858/tp.2022.17.3.09.

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This article presents the results of a study of an alternative method for reducing friction losses in the cylinder-piston group of internal combustion engines based on an experimental installation, taking into account changes in the real state of the working surfaces of the mating parts of the piston ring-cylinder pair depending on the operating time. The factors with a progressive effect on the operation of engine friction units as they wear out are studied, and the degree of their influence on wear is estimated. A model of the friction unit of a cylinder-piston group (piston-piston ring pair

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20

Farid Mammadov, Farid Mammadov. "IMPROVING THE WEAR RESISTANCE OF SEALING CUFFS AND PISTONS OF DRILLING PUMPS." PROCEEDINGS OF OCCUPATIONAL HEALTH & INDUSTRIAL SAFETY 05, no. 01 (2025): 82–86. https://doi.org/10.55858/prohis05012025-82.

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Modern technology, including equipment for the production and operation of oil and gas wells, is characterized by significant specifics of the design of machines and units with a wide range of technological functions, combined with a variety of standard sizes and modifications. One of such equipment is drilling rigs, where the main part of this installation is mud pumps. that the most vulnerable part of the pump is its hydraulic part, or rather the piston group. The work is devoted to improving the operability of the piston group of mud pumps, in particular, the choice of material for the manu

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21

Ułanowicz, Leszek, Grzegorz Jastrzębski, Paweł Szczepaniak, Ryszard Sabak, and Dariusz Rykaczewski. "Malfunctions of Aviation Hydraulic Pumps." Journal of KONBiN 50, no. 3 (2020): 257–76. http://dx.doi.org/10.2478/jok-2020-0061.

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AbstractHydraulic pumps are among the most complex and responsible units from the point of view of aircraft flight safety. One of the most important scientific and technical problems in improving the reliability of hydraulic pumps is to understand the physical nature of the cause of damage in them and on this basis to develop measures and recommendations to ensure their reliability. The article discusses the characteristics of hydraulic piston pairs of hydraulic pumps according to the kinematics of their movement and load conditions. Selected actual damages of axial piston pumps are discussed.

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22

Cwojdziński, Leszek, and Mirosław Adamski. "POWER UNITS AND POWER SUPPLY SYSTEMS IN UAV." Aviation 18, no. 1 (2014): 1–8. http://dx.doi.org/10.3846/16487788.2014.865938.

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One of the major tasks in the process of designing future unmanned aerial vehicles is the appropriate choice of a propulsion system and a power source. Depending on the role and size of a given UAV, the following engines are used: electric, jet, turbine and piston (combustion). The following paper also analyses the faultiness of UAVs. Moreover, the most appropriate propulsion systems and power sources depending on the type and description of the mission performed by a UAV are recommended.

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23

Tkach, Vyacheslav. "INFLUENCE OF WORKING FLUID VISCOSITY ON LUBRICATION MODE OF HYDRAULIC UNITS OF CONSTRUCTION MACHINES." Globus: technical sciences 7, no. 3(39) (2021): 3–8. http://dx.doi.org/10.52013/2713-3079-39-3-1.

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The influence of dynamic viscosity of working liquids И-20А, МГЕ-46В, ВМГЗ on the lubrication of plunger pairs of axial-piston pumps of construction equipment is considered in the article. Based on the existing classification of lubricant types, a mathematical model is obtained to determine the effective viscosity, which corresponds to the transition of the plunger pair from the boundary lubrication regime to the semi-liquid mode. The obtained model takes into account the geometric parameters, the speed of rotation of the pump shaft and the size of the dimensionless criterion — the relative th

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24

Urbański, Patryk, Maciej Bajerlein, Jerzy Merkisz, Andrzej Ziółkowski, and Dawid Gallas. "Analysis of thermodynamic parameters in spark ignition VCR engine." MATEC Web of Conferences 294 (2019): 05001. http://dx.doi.org/10.1051/matecconf/201929405001.

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3D models of Szymkowiak and conventional engines were created in the Solidworks program. During the motion analysis, the characteristics of the piston path were analyzed for the two considered engine units. The imported file with the generated piston routes was used in the AVL Fire program, which simulated combustion processes in the two engines with identical initial conditions. The configurations for two different compression ratios were taken into account. The basic thermodynamic parameters occurring during the combustion process in internal combustion engines were analyzed.

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25

Hrudz, V. Ya, and N. B. Slobodian. "THE IMPROVEMENT ON THE EFFICIENCY OF CLEANING GAS PIPELINES FROM LIQUID CONTAMINANTS." Prospecting and Development of Oil and Gas Fields, no. 2(71) (June 25, 2019): 49–54. http://dx.doi.org/10.31471/1993-9973-2019-2(71)-49-54.

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The article considers modern methods of improving the efficiency of pipeline transport cleaning. The most effective method for increasing the efficiency of the gas pipeline is its periodic cleaning with the use of mechanical cleaning units. The reasons for the decrease of efficiency are the presence of fluid in the pipeline interior. Fluid can be in two forms – high-viscosity resin sediments and low-viscosity liquid sediments. Sediments reduce the area of the cross-section and increase the hydraulic resistance. Regardless of the design of the cleaning units, none of them can completely remove

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26

Maksimenko, N. M., and A. A. Laptev. "Design features of engines of generation of A-41SI family." Sel'skohozjajstvennaja tehnika: obsluzhivanie i remont (Agricultural Machinery: Service and Repair), no. 5 (May 1, 2020): 29–34. http://dx.doi.org/10.33920/sel-10-2005-05.

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Design documentation on diesel engines of the A-41SI model is analysed. By results of the analysis it is revealed that on diesels of this type individual heads of cylinders, an electric starter with a pro-rate for start of engines are introduced, assembly units and details are improved: cranked shaft, sets of radical and shatunny inserts, cylinder sleeve, the piston, set of piston rings, casing with disks of the coupling of coupling, etc. Introduction of new constructive changes on A-41SI diesels allowed to raise their rabotosposbnost and durability.

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27

Grgec Bermanec, Lovorka, Davor Zvizdic, and Vedran Simunovic. "Development of Method for Determination of Pressure Balance Piston fall Rate." ACTA IMEKO 3, no. 2 (2014): 44. http://dx.doi.org/10.21014/acta_imeko.v3i2.105.

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<p>This paper describes a laboratory method for the determination of the pressure balance piston fall rate using a simple camera-based optical system with internally developed software. Measurements were carried out on three standard piston/cylinder units in the Croatian National Pressure Laboratory (LPM) using gas and oil as transmitting medium.<br />Measurement equipment, procedure and fall rate results for three sets of measurements are given, as well as an evaluation of the measurement uncertainty. Results were compared with other relevant measurements.</p>

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28

Maksimenko, N. M., and A. A. Laptev. "Design features of the new generation engines of the A-41SI family." Sel'skohozjajstvennaja tehnika: obsluzhivanie i remont (Agricultural Machinery: Service and Repair), no. 2 (February 28, 2022): 55–61. http://dx.doi.org/10.33920/sel-10-2202-07.

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Design documentation on diesel engines of the A-41SI model is analysed. By results of the analysis it is revealed that on diesels of this type individual heads of cylinders, an electric starter with a pro-rate for start of engines are introduced, assembly units and details are improved: cranked shaft, sets of radical and shatunny inserts, cylinder sleeve, the piston, set of piston rings, casing with disks of the coupling of coupling, etc. Introduction of new constructive changes on A-41SI diesels allowed to raise their rabotosposbnost and durability.

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29

Polyakov, N. A., G. K. Frolov, V. A. Tselischev, and D. V. Tselischev. "Problems of testing and operation of hydraulic power transfer units." VESTNIK of Samara University. Aerospace and Mechanical Engineering 23, no. 3 (2024): 132–43. http://dx.doi.org/10.18287/2541-7533-2024-23-3-132-143.

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The purpose and principles of operation of a civil aircraft emergency system including a power transfer unit are considered. Problems and trends of the development of piston hydraulic machines in aircraft construction are analyzed. The parameters of power transfer units used on 12 types of passenger airplanes are analyzed. The scenarios of failure of power transmission units are considered. The main directions of solving the problems of operation, as well as the requirements to design and testing are outlined.

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30

Melyantsov, Petro. "SUBSTITUTION OF CONTROLLING STRUCTURAL PARAMETERS OF THE TECHNICAL CONDITION OF PARTS OF THE PLUGGAGE PAIR OF AXIAL-PISTON HYDRAULIC MACHINES FOR REPAIR PRODUCTION CONDITIONS." European Science, sge38-02 (March 30, 2022): 6–47. https://doi.org/10.30890/2709-2313.2025-38-02-007.

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The post-repair durability of axial-piston hydraulic units of hydraulic transmissions of mobile machines is largely determined by the quality of restoration of mating parts at service enterprises, which is formed on the basis of substantiated structural

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31

Baus, Ivan, Robert Rahmfeld, Andreas Schumacher, and Henrik Pedersen. "LOAD CYCLE INVESTIGATION OF AXIAL PISTON UNITS INTEGRATED INTO A FORWARDER." MM Science Journal 2018, no. 03 (2018): 2460–65. http://dx.doi.org/10.17973/mmsj.2018_10_201837.

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32

Sabuga, W., A. S. Hashad, and S. Ehlers. "2D flow model for calculating effective area of piston-cylinder units." ACTA IMEKO 9, no. 5 (2020): 319. http://dx.doi.org/10.21014/acta_imeko.v9i5.992.

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A 2D flow model is described for calculation of the effective area (<em>A</em>) of pressure-measuring piston-cylinder units (PCU) based on their dimensional properties. With the 2D model, the uncertainty contribution associated with PCU's axial non-symmetry can be eliminated and the uncertainty of <em>A</em> can be reduced. The 2D model is applied to several primary PCUs operated in absolute and gauge pressure modes with different pressure-transmitting media. The benefit of the 2D model in dependence on PCU's geometrical perfectness is discussed.

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33

Miles, John R., Lorne E. Munro, and James R. Pekelsky. "A new instrument for the dimensional characterization of piston–cylinder units." Metrologia 42, no. 6 (2005): S220—S223. http://dx.doi.org/10.1088/0026-1394/42/6/s16.

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34

Salikhov, R. F., V. N. Kuznetsova, and V. V. Dubkov. "Expert assessment results anaylisys of machines power units in winter conditions." Russian Automobile and Highway Industry Journal 17, no. 5 (2020): 550–61. http://dx.doi.org/10.26518/2071-7296-2020-17-3-550-561.

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Introduction. The implementation of production and technological processes of machines on the vast territory of the Russian Federation is related to the necessity to operate them in low temperatures conditions. The article presents the results of the applied scientific research of the factors that have a negative impact on the operation process of internal combustion engines at low ambient temperatures. The use of the modern methods and means of diagnostics of the cylinder-piston group and the crank- engine mechanism make it possible to reliably establish the causes of the internal combustion

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35

Busarov, S. S., D. C. Titov, I. S. Demin, and A. V. Nedovenchany. "Evaluation of effect of leakage in cylinder-piston seals on working process of low-speed long stroke piston units." Omsk Scientific Bulletin, no. 163 (2019): 5–10. http://dx.doi.org/10.25206/1813-8225-2019-163-5-10.

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36

Wei, Jian Yu, Jian Lu, Qi Bin Liu, Feng Wu, and Feng Wang. "AMESim Concrete Pump Closed Type Hydraulic System Modeling and Simulation Research." Applied Mechanics and Materials 336-338 (July 2013): 668–71. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.668.

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In order to analyze the dynamic characteristics of the concrete pump closed type hydraulic system in the process of pumping, we add two speed sensors and power units in the system, to achieve the dynamic loading of the pumping load by judging the main oil cylinder speed. We also establish the concrete pump closed type hydraulic system model for the dynamic simulation. The results show that in the process of pumping, pumping pressure keeps constant value and no pressure impact. Meanwhile the piston displacement linearity increases or decreases and the piston velocity keep the constant value.

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37

Petrushchenkov, V. A., and I. A. Korshakova. "Qualitative and quantitative analysis of small scale thermal energy in Russia." Power engineering: research, equipment, technology 22, no. 5 (2020): 52–70. http://dx.doi.org/10.30724/1998-9903-2020-22-5-52-70.

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THE PURPOSE. Perform a review of information sources on the state of small-capacity thermal power in Russia when the unit capacity of steam turbine, gas turbine and gas piston units is less than 25 MW. Evaluate the information sources of the authors of publications that provide statistics for small-scale energy facilities. Make an assessment of the state of small-scale energy in Russia based on a specific list of objects maintained by the authors over the past 25 years. Consider the manufacturers and characteristics of different types of aggregates, as well as the schemes for integrating aggre

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Kondrashov, Yu I., E. N. Ermilova, and A. N. Vidyaskina. "An experimental study of the influence of valve drive type on the dynamic loading and service life of valve seals of units." VESTNIK of Samara University. Aerospace and Mechanical Engineering 20, no. 2 (2021): 97–104. http://dx.doi.org/10.18287/2541-7533-2021-20-2-97-104.

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The article discusses an experimental study of the influence of the valve drive type on the dynamic loading and service life of valve seals of units. The results of research of the modes of closing of piston valves and bellows valves at different response speeds are presented. The differences in the amplitude characteristics of repeated impact, arising from the rapid return motion of the valves trim, in the piston and bellows versions of the valve are established. The influence of the operating mode on the service life in both versions of the valve design was assessed, and pressurized leakage

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Nizhegorodov, A. I. "A new variety of axial piston hydraulic machines with multi-row units and a dual oscillating unit." iPolytech Journal 27, no. 2 (2023): 250–62. http://dx.doi.org/10.21285/1814-3520-2023-2-250-262.

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The possibility of increasing the working volume, power, specific energy capacity (energy efficiency), and acceleration response of hydraulic machines under reduced supply and torque pulsation is investigated. The research methodology included the geometric, kinematic, power, and energy analysis of a four-row axial piston hydraulic machine with a dual oscillating unit and without an end distribution system. As a result, a new type of compact rotary hydraulic machines with volumetric action was created. In the proposed model, each subsequent row of cylinders is located in the inter-cylinder spa

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Yanchenko, I. V., N. Y. Kurnakova, and A. V. Nuzhdin. "Increasing energy efficiency of gas piston TPP through integrated use of thermal secondary energy resources." Vestnik IGEU, no. 1 (February 28, 2024): 28–34. http://dx.doi.org/10.17588/2072-2672.2024.1.028-034.

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Recently, the advantages and prospects to use piston gas internal combustion engines for the combined generation of electrical and thermal energy have become increasingly obvious. The range of single capacities of gas piston units (GPU) ranges from 0,1 MW to tens of MW, which makes them more attractive when designing various power facilities. Most brands of gas piston units can operate in co-generation mode, that is, as a combined heat and power plant that simultaneously generates electrical and thermal energy. The purpose of this study is to substantiate the possibility of integrated use of h

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Pastukhov, Mykola, and Yevhen Riabov. "Creation of power supply systems using expander-generator units." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 1(10) (July 9, 2025): 107–11. https://doi.org/10.20998/eree.2025.1(10).332109.

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The use of technologies aimed at increasing energy efficiency and energy independence of technological processes is a key direction in the development of the oil and gas industry. For gas infrastructure facilities, it is possible to use the energy released when reducing the gas flow. For this purpose, installations based on turboexpanders are used. Their use for generating electricity allows to provide power supply to consumers of the gas infrastructure facility and reduce or abandon gas consumption for technological processes. In order to increase the energy independence of gas infrastructure

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Zakharova, N. V., D. V. Zirnit, and A. A. Tatevosyan. "THE CONTROL SYSTEM OF A LINEAR PMSM IN DRIVE OF THE LOW-SPEED LONG-STROKE RECIPROCATING COMPRESSOR." DYNAMICS OF SYSTEMS, MECHANISMS AND MACHINES 12, no. 1 (2024): 61–65. https://doi.org/10.25206/2310-9793-2024-12-1-61-65.

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In the practice of developing and using reciprocating compressor units, there is a task of forming the law of piston movement of a low-speed long-stroke reciprocating compressor with specified parameters such as amplitude and frequency, as well as the possibility of setting the harmonic composition (non-sinusoidal law of piston movement). This task is due, for example, to the need for smooth gas injection followed by a rapid suction phase – this allows you not to overheat the compressor stage. The main feature of a linear electromagnetic motor is the direct proportionality between the force ac

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Busarov, S. S., I. S. Busarov, and D. S. Titov. "Experimental determination of conditional clearances for cylinder piston seals of compressor units." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 3, no. 1 (2019): 50–56. http://dx.doi.org/10.25206/2588-0373-2019-3-1-50-56.

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Matsuk, Z. N., T. V. Bunko, A. S. Belikov, and V. A. Shalomov. "Regularities of safe control of piston compressor units of mobile compressor stations." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 2 (2021): 76–81. http://dx.doi.org/10.33271/nvngu/2021-2/076.

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Purpose. Ensuring the optimal mode of gas transportation from local sections of the main gas trunkline (GT), subject to repair (maintenance) and/or shutdown, to existing main gas trunkline based on the calculation, determination, and establishment of rational values of the operating modes of mobile compressor stations during the entire time of gas pumping. Methodology. The studies are based on existing physical principles and laws that describe the effect of the properties of natural gas and the geometric parameters of pipelines through which gas is pumped on the dynamics of changes in the mas

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Molinar, G. F., R. Maghenzani, P. C. Cresto, and L. Bianchi. "Elastic Distortions in Piston-Cylinder Units at Pressures up to 0,5 GPa." Metrologia 29, no. 6 (1993): 425–40. http://dx.doi.org/10.1088/0026-1394/29/6/006.

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Babak, Vitalii, and Viatcheslav Stadnychenko. "APPLICATION OF REVITALISANTS FOR EXTENSION OF RESOURCE AND RESTORING WORN‐OUT FRICTION UNITS OF AVIATION AXIAL ‐ PISTON HYDROMACHINES." Aviation 8, no. 1 (2004): 8–12. http://dx.doi.org/10.3846/16487788.2004.9635863.

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The perspectives of application of using RVS technique for repairing and prophylactic of hydraulic systems’ units, particularly axial‐piston machines are considered. Physical background of revitalization processes, which took place on the friction surfaces during drifting of cermets coating (CC) are uncovered. The results were received from numerous investiga‐tions.

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Nizhegorodov, A. I. "DEVELOPING THE CONCEPT OF AXIAL PISTON HYDRAULIC MACHINES WITH DOUBLE-ROW WORKING CHAMBERS OF PUMPING UNITS: A REVIEW OF CURRENT ACHIEVEMENTS." Spravochnik. Inzhenernyi zhurnal, no. 334 (January 2025): 29–38. https://doi.org/10.14489/hb.2025.01.pp.029-038.

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In this article, we review the designs of rotary axial piston hydraulic machines (APHMs) with double-row cylinder blocks, paying particular attention to their specific characteristics. Conventional APHMs with a tilted disk and a tilted block have been modified to form a new type of rotary hydraulic machines and hydraulic motors. The former are characterized not only by increased working volume, delivery, and power, but also by reduced pulsation. The latter exhibit increased torque. The peculiarity of blocks in such APHMs consists in the use of inter-cylinder space of the main working chambers

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GOLINITSKY, PAVEL V. "Digital marking of spare parts." Agricultural Engineering, no. 4 (2024): 44–50. http://dx.doi.org/10.26897/2687-1149-2024-4-44-50.

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The main component that is most often subject to repair in auto-tractor engines is the cylinder-piston unit, the operation of which will determine the reliability and efficiency of all equipment. Currently, color marking is used for cylinder-piston groups, but this type of marking is not sufficiently informative. There is an urgent need to shift from human-readable markings to machine-readable ones. To introduce digital marking for spare parts and ensure digital transformation of repair enterprises, the authors considered the main quality indicators of spare parts of automotive tractor engines

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Schmid, R., and J. P. Budliger. "Resonance Stirling Engine producing heat and power (CHP)." E3S Web of Conferences 313 (2021): 01003. http://dx.doi.org/10.1051/e3sconf/202131301003.

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The free-piston Resonance Stirling engine forms a new “electricity producing heating system”. Its compact assembly operates reliably and at high efficiency, setting new standards for small heating systems. Complete units are currently submitted to a prolonged test program, preparing their production at an industrial scale. The engines are heated from outside by a FLOX-burner (flameless flue gas recirculation burner), exposing the working gas to high temperatures. Even at low excess air rates the flue gases are virtually free of pollutants. The free pistons of this resonance concept oscillate i

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Lubják, Peter, Jozef Čerňan, and Radoslava Nichtová. "Combustion engine piston modifications for better performance in UAV aplication." AEROjournal 22, no. 2 (2024): 3–6. https://doi.org/10.26552/aer.c.2024.2.1.

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The issues described in the article are largely an overview and explanation of the functions of various modern modifications to internal combustion engine pistons, which significantly increase the performance and reliability of current power units with a minimum amount of technical implementation. Especially the modification in the form of gasporting can indicate the direction that will soon be possible to take when modifying engines.

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