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Study of Heat Transfer in the Flow Passage of an Oil-Free Screw Vacuum Pump with Variable Pitch Rotors 无油螺杆泵变螺距转子流道传热研究
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S1052618826700160
A. A. Laskin, A. E. Kapustin, A. A. Raikov, S. I. Salikeev, A. V. Burmistrov
{"title":"Study of Heat Transfer in the Flow Passage of an Oil-Free Screw Vacuum Pump with Variable Pitch Rotors","authors":"A. A. Laskin,&nbsp;A. E. Kapustin,&nbsp;A. A. Raikov,&nbsp;S. I. Salikeev,&nbsp;A. V. Burmistrov","doi":"10.1134/S1052618826700160","DOIUrl":"10.1134/S1052618826700160","url":null,"abstract":"<p>The article presents a comprehensive study of heat transfer in the flow path of oil-free screw vacuum pumps with variable rotor pitch. A calculation method is proposed that combines mathematical modeling of the work process using the chamber method with finite element analysis. A distinctive feature of the approach is the use of an iterative algorithm that takes into account the mutual influence of the temperatures of the rotor and the gas in the working cavity. An assessment of the adequacy of the model using the SVP-650 pump as an example showed a discrepancy with experimental data of no more than 4%. Based on the thermal calculation, a deformation analysis was performed to determine under what conditions, for given clearances, rotor seizure may occur.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"410 - 415"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of Modification of Plastic Greases by the Incorporation of Nickel and Tungsten Disulfide Nanoparticles 二硫化镍钨纳米颗粒改性塑料润滑脂的研究
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S1052618826700147
I. D. Kolesnikov, A. K. Anoprienko
{"title":"Study of Modification of Plastic Greases by the Incorporation of Nickel and Tungsten Disulfide Nanoparticles","authors":"I. D. Kolesnikov,&nbsp;A. K. Anoprienko","doi":"10.1134/S1052618826700147","DOIUrl":"10.1134/S1052618826700147","url":null,"abstract":"<p>Litol-24 lubricating grease is one of the most widely used greases in the Commonwealth of Independent States. It has good tribological properties that are insufficient for the operation of road construction machine joints under severe conditions. Therefore, Litol-24 grease is being modernized by the incorporation of nanoparticles into its composition. This work examines the effect of modifiers of Litol-24 grease, such as nickel particles (at concentrations of 0.1, 0.5, and 1.0% of grease weight) and tungsten disulfide particles (at concentrations of 1, 2, and 3% of grease weight), on the changes in tribological characteristics such as wear scar size and change in the friction pair element mass.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"377 - 381"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of the Fundamentals of Engineering Calculation of a Multisector Tool for Calibration by Compression of Thin-Walled Cylindrical Pipes 薄壁圆柱管压缩校准多扇形工具工程计算基础的发展
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S1052618826700184
I. L. Bezlepkin, M. A. Vasechkin, O. Yu. Davydov, V. G. Egorov
{"title":"Development of the Fundamentals of Engineering Calculation of a Multisector Tool for Calibration by Compression of Thin-Walled Cylindrical Pipes","authors":"I. L. Bezlepkin,&nbsp;M. A. Vasechkin,&nbsp;O. Yu. Davydov,&nbsp;V. G. Egorov","doi":"10.1134/S1052618826700184","DOIUrl":"10.1134/S1052618826700184","url":null,"abstract":"<p>This article focuses on the development of an engineering calculation methodology for a multisector crimping tool used for calibrating the ends of thin-walled cylindrical pipes and fittings. The objective of the study is to establish analytical relationships between the geometric parameters of the crimping die and the force characteristics necessary for designing equipment for calibrating thin-walled pipes by crimping, ensuring the required accuracy and quality when preparing circumferential joints of pipes and fittings for automatic welding. Calculation formulas are proposed for determining the specific force required to compress a multisector die by a given amount of radial displacement of its sectors and for estimating the resulting bending stress. The resulting relationships enable optimization of tool design for calibrating pipes of various diameters.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"389 - 395"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a Design of a Mobile Robotic Complex for Extinguishing Oil Fires in Tank Parts 一种用于油罐零件灭火的移动机器人综合体的设计开发
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S1052618826700135
V. V. Kiselev, A. V. Toporov, V. E. Ivanov, P. O. Mikhailin
{"title":"Development of a Design of a Mobile Robotic Complex for Extinguishing Oil Fires in Tank Parts","authors":"V. V. Kiselev,&nbsp;A. V. Toporov,&nbsp;V. E. Ivanov,&nbsp;P. O. Mikhailin","doi":"10.1134/S1052618826700135","DOIUrl":"10.1134/S1052618826700135","url":null,"abstract":"<p>This article examines the existing types of mobile robotics used to carry out work to eliminate man-made accidents and extinguish fires at oil and petroleum product storage facilities associated with the risk of death, injury, and poisoning of firefighters and to conduct fire reconnaissance and deliver fire-extinguishing agents to the source of the fire in areas of elevated temperatures and other damaging hazardous and harmful factors. The main shortcomings of existing fire-fighting robotic systems have been identified. A new design of a mobile robotic complex equipped with a reel with fire hoses for laying main hose lines at a distance ensuring the safe location of firefighters is proposed and described. A three-dimensional model of the designed robotic complex is presented; its main tactical and technical characteristics and the results of the calculations are given.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"396 - 402"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the Lag Trace of Scalar and Vector Properties of Steel 45 under Deformation along Offset-Fan Trajectories 45钢在偏置扇形轨迹变形下的标量和矢量特性滞后轨迹研究
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S1052618826700196
V. I. Gul’tyaev, A. A. Alekseev, S. L. Subbotin, A. N. Shirokov, A. N. Bulgakov
{"title":"Study of the Lag Trace of Scalar and Vector Properties of Steel 45 under Deformation along Offset-Fan Trajectories","authors":"V. I. Gul’tyaev,&nbsp;A. A. Alekseev,&nbsp;S. L. Subbotin,&nbsp;A. N. Shirokov,&nbsp;A. N. Bulgakov","doi":"10.1134/S1052618826700196","DOIUrl":"10.1134/S1052618826700196","url":null,"abstract":"<p>The paper is devoted to investigation of complex elastoplastic deformation processes in thin‑walled cylindrical shells and the resulting “dives” of the stress‑vector modulus on experimental deformation diagrams. Two‑segment piecewise‑linear paths were chosen as deformation trajectories. After preliminary proportional tension with torsion to the level <i>E</i><sub>1</sub> = <i>E</i><sub>3</sub> = 1%, the trajectory was sharply broken at angles ±45°, ±90°, ±135°, 150°, 180°, corresponding to changes in the loading mode to compression, reverse torsion, simple unloading, etc. The study is based on the vector representation of loading and deformation processes by A.A. Ilyushin and on positions of the modern theory of elastoplastic processes by Zubchaninov. The possibility of finding a single deformation curve for trajectories with different break angles is considered. The phenomenon of lagging of scalar and vector properties is analyzed, and several methods for determining the length of the lag traces are described. Conclusions are drawn on the influence of the trajectory break angle on the lag‑trace length for this series of experiments. Experimental yield onset points in principal stress space are presented and compared with the geometric plasticity conditions of Huber–Mises and Tresca–Saint‑Venant.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"333 - 342"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Consideration of the Influence of the Thermal Action of a Pulse Current on the Determination of the Temperature of a Steel Strip during Longitudinal Cold Rolling 纵向冷轧过程中脉冲电流热作用对带钢温度测定影响的考虑
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S1052618826700202
U. Kh. Ugurchiev, N. N. Novikova
{"title":"Consideration of the Influence of the Thermal Action of a Pulse Current on the Determination of the Temperature of a Steel Strip during Longitudinal Cold Rolling","authors":"U. Kh. Ugurchiev,&nbsp;N. N. Novikova","doi":"10.1134/S1052618826700202","DOIUrl":"10.1134/S1052618826700202","url":null,"abstract":"<p>An engineering approach to determining the temperature of a steel strip under conditions of dry external friction during longitudinal cold rolling on a laboratory single-stand mill is proposed, taking into account the effect of the thermal effect of a pulse current.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"369 - 376"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the Design and Friction Processes in Operation of Face-Type Bearing Supports with Magnetic Self-Unloading by Permanent Magnets 永磁体磁自卸面型轴承支座设计及运行摩擦过程分析
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S105261882670024X
A. N. Bolotov, V. V. Novikov, O. O. Novikova
{"title":"Analysis of the Design and Friction Processes in Operation of Face-Type Bearing Supports with Magnetic Self-Unloading by Permanent Magnets","authors":"A. N. Bolotov,&nbsp;V. V. Novikov,&nbsp;O. O. Novikova","doi":"10.1134/S105261882670024X","DOIUrl":"10.1134/S105261882670024X","url":null,"abstract":"<p>A design for a face-type bearing support with self-unloading by rare-earth permanent magnets is developed. A range of magnetic antifriction materials is proposed to ensure high tribological performance of the developed units. An analysis of the magnetic unloading force and friction processes during operation of the face-type self-unloading bearing supports under high-temperature conditions is conducted. Tribological tests have revealed low effective friction coefficients for the developed tribological units.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"343 - 349"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pulsed Current-Induced Recrystallization in Commercially Purified Aluminum 商业纯化铝中脉冲电流诱导的再结晶
IF 0.3
Journal of Machinery Manufacture and Reliability Pub Date : 2026-08-15 DOI: 10.1134/S1052618826700159
M. Pigato, V. V. Stolyarov
{"title":"Pulsed Current-Induced Recrystallization in Commercially Purified Aluminum","authors":"M. Pigato,&nbsp;V. V. Stolyarov","doi":"10.1134/S1052618826700159","DOIUrl":"10.1134/S1052618826700159","url":null,"abstract":"<p>A comparison was made of the influence of electric pulse treatment of different intensities and annealing in a furnace at the same temperatures and duration on the process of static recrystallization of commercially pure aluminum. Structural changes were monitored by measuring microhardness as well as by observation in optical and scanning electron microscopes. For some samples, the results of using electric pulse treatment were compared with the results of using annealing to evaluate the nonthermal effect of current on the recrystallization process. It has been shown that the use of electric current, compared to heat treatment in a furnace, accelerates the process of nucleation of recrystallization centers, which leads to refinement of the microstructure. The practical significance of using current is to reduce the processing temperature, increase the energy efficiency of the process, and obtain a material with improved mechanical properties.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 4","pages":"358 - 368"},"PeriodicalIF":0.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analogies and Generalizations of Phenomena Accepted When Solving Reliability Problems 解决可靠性问题时所接受的现象的类比和概括
IF 0.4
Journal of Machinery Manufacture and Reliability Pub Date : 2026-05-29 DOI: 10.1134/S1052618826700093
A. V. Ragutkin, I. N. Kravchenko, M. E. Stavrovsky, I. M. Sidorov, E. S. Postnikova
{"title":"Analogies and Generalizations of Phenomena Accepted When Solving Reliability Problems","authors":"A. V. Ragutkin,&nbsp;I. N. Kravchenko,&nbsp;M. E. Stavrovsky,&nbsp;I. M. Sidorov,&nbsp;E. S. Postnikova","doi":"10.1134/S1052618826700093","DOIUrl":"10.1134/S1052618826700093","url":null,"abstract":"<p>In matters of design quality assurance, special attention is paid to the reliable operation of products under various operating conditions, ensuring the operability of the material property relationships. The article examines approaches to studying the patterns of processes and phenomena and formalized procedures for making changes to their mathematical description. The necessity of testing physical concepts and representations that are geometric, statistical, and then thermodynamic analogies (integral or averaged) is shown. The problems of generalization are considered using the example of critical phenomena of different nature.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 3","pages":"266 - 273"},"PeriodicalIF":0.4,"publicationDate":"2026-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual-Frequency Method for Control of Surface Hardening of a Ferromagnetic Part 铁磁零件表面硬化控制的双频方法
IF 0.4
Journal of Machinery Manufacture and Reliability Pub Date : 2026-05-29 DOI: 10.1134/S1052618826700019
V. V. Miroshnikov, N. V. Grechishkina, A. A. Nedelko, R. A. Dikiy
{"title":"Dual-Frequency Method for Control of Surface Hardening of a Ferromagnetic Part","authors":"V. V. Miroshnikov,&nbsp;N. V. Grechishkina,&nbsp;A. A. Nedelko,&nbsp;R. A. Dikiy","doi":"10.1134/S1052618826700019","DOIUrl":"10.1134/S1052618826700019","url":null,"abstract":"<p>A two-frequency method for monitoring the surface hardening of ferromagnetic parts is proposed. The physical processes occurring in the surface layer of metal under the influence of low- and high-frequency magnetic fields are considered. It is shown that the spectral composition of the output signal of the measuring coil contains informative harmonics that allow one to evaluate the properties of the hardened layer. Particular attention is paid to the second harmonic, which is most sensitive to changes in layer thickness and microhardness. The results confirm the possibility of using the method for fast and reliable quality control of hardened parts.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":"55 3","pages":"293 - 301"},"PeriodicalIF":0.4,"publicationDate":"2026-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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