Pub Date : 2024-02-08DOI: 10.1134/s1052618823090091
A. M. Mikhal’chenkov, I. N. Kravchenko, V. F. Komogortsev, S. A. Fes’kov, G. V. Orekhova, O. V. Barmina
Abstract
The operation of the executive bodies of soil and soil-cultivating equipment (for example, the teeth of excavator buckets) is often accompanied by the formation and development of local wear, which is the cause of destruction. Meanwhile, well-known theoretical studies devoted to the study of working conditions and forecasting the resource of such parts are few and are of a private nature, stipulated by the solution of specific problems. This article deals with cantilever-fixed parts in the case of prevailing wear in local areas of the working surface. A rectangular cantilever fixed beam subjected to bending with a section where a groove simulating wear is located is considered as a calculation model. It has been established that the working state of a cantilever-fixed part with the presence of local wear is determined by a system of inequalities relating its geometry to the allowable stresses and pressure of the wear medium. A mathematical model has been obtained facilitating prediction of the resource of a part as its wear develops.
{"title":"Assessment of the Performance of a Loaded Cantilever-Fixed Part in the Course of Local Wear","authors":"A. M. Mikhal’chenkov, I. N. Kravchenko, V. F. Komogortsev, S. A. Fes’kov, G. V. Orekhova, O. V. Barmina","doi":"10.1134/s1052618823090091","DOIUrl":"https://doi.org/10.1134/s1052618823090091","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The operation of the executive bodies of soil and soil-cultivating equipment (for example, the teeth of excavator buckets) is often accompanied by the formation and development of local wear, which is the cause of destruction. Meanwhile, well-known theoretical studies devoted to the study of working conditions and forecasting the resource of such parts are few and are of a private nature, stipulated by the solution of specific problems. This article deals with cantilever-fixed parts in the case of prevailing wear in local areas of the working surface. A rectangular cantilever fixed beam subjected to bending with a section where a groove simulating wear is located is considered as a calculation model. It has been established that the working state of a cantilever-fixed part with the presence of local wear is determined by a system of inequalities relating its geometry to the allowable stresses and pressure of the wear medium. A mathematical model has been obtained facilitating prediction of the resource of a part as its wear develops.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751850","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}
Pub Date : 2024-02-01DOI: 10.1134/s1052618824010102
Abstract
Some issues in the development of a control system are considered for a manipulator with stepper actuators. For control of mechanisms with a remote center of motion, the methods to generate the control signals are presented when using unipolar and bipolar stepper motors. Examples of actuator control are given using different motion generators. The problems of development of motion generators and manipulator control methods for the simultaneous work of two or more actuators are considered.
{"title":"Control of a Four-Coordinate Manipulator with a Remote Center of Motion","authors":"","doi":"10.1134/s1052618824010102","DOIUrl":"https://doi.org/10.1134/s1052618824010102","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Some issues in the development of a control system are considered for a manipulator with stepper actuators. For control of mechanisms with a remote center of motion, the methods to generate the control signals are presented when using unipolar and bipolar stepper motors. Examples of actuator control are given using different motion generators. The problems of development of motion generators and manipulator control methods for the simultaneous work of two or more actuators are considered.</p> </span>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140317076","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}
Pub Date : 2024-02-01DOI: 10.1134/s1052618824010047
Abstract
A practical method for determining a diagram when measuring circumferential strains of the free surfaces of cylinders in their stressed joints, and the deformation force characteristics of TiNi based alloys with shape memory in the range of martensitic transformations are presented.
摘要 介绍了在测量圆柱体受力接头自由表面圆周应变时确定图表的实用方法,以及在马氏体转变范围内具有形状记忆的 TiNi 基合金的变形力特性。
{"title":"Method for Determining Thermomechanical Diagram for Stressed Cylinder Joints under Plane Strain","authors":"","doi":"10.1134/s1052618824010047","DOIUrl":"https://doi.org/10.1134/s1052618824010047","url":null,"abstract":"<span> <h3>Abstract</h3> <p>A practical method for determining a diagram when measuring circumferential strains of the free surfaces of cylinders in their stressed joints, and the deformation force characteristics of TiNi based alloys with shape memory in the range of martensitic transformations are presented.</p> </span>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140311647","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}
Pub Date : 2024-02-01DOI: 10.1134/s1052618824010023
Abstract
The problem of heat transfer during fluctuations of the lubricating layer has been studied. As a result of comparing theoretical data with experiments, one can conclude that the difference was no more than 3%. The results of the study of the fluctuation damping decrement have been presented.
{"title":"Temperature Fluctuations of the Lubricant Layer under Friction","authors":"","doi":"10.1134/s1052618824010023","DOIUrl":"https://doi.org/10.1134/s1052618824010023","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The problem of heat transfer during fluctuations of the lubricating layer has been studied. As a result of comparing theoretical data with experiments, one can conclude that the difference was no more than 3%. The results of the study of the fluctuation damping decrement have been presented.</p> </span>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140311524","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}
Pub Date : 2023-12-28DOI: 10.1134/s1052618823080137
A. V. Oleinik, K. N. Ramazanov
Abstract
When applying a vacuum-arc discharge plasma coating to profilecomposite items, such as twin turbine blades, unicycle blades, etc., a problem might occur with ensuring the tolerance on the coating thickness. This article presents the obtained dependence of the nonuniformity of the coating thickness on the geometric parameters of the inter-blade channel—its length and width. We develop a simulation model for calculating the distribution of the thickness of the vacuum-arc discharge plasma coating for the profilecomposite parts having shadow zones.
{"title":"Dependence of the Nonuniformity of Thickness of the Vacuum-Arc Discharge Plasma Coating on the Geometric Parameters of the Inter-Blade Channel","authors":"A. V. Oleinik, K. N. Ramazanov","doi":"10.1134/s1052618823080137","DOIUrl":"https://doi.org/10.1134/s1052618823080137","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>When applying a vacuum-arc discharge plasma coating to profilecomposite items, such as twin turbine blades, unicycle blades, etc., a problem might occur with ensuring the tolerance on the coating thickness. This article presents the obtained dependence of the nonuniformity of the coating thickness on the geometric parameters of the inter-blade channel—its length and width. We develop a simulation model for calculating the distribution of the thickness of the vacuum-arc discharge plasma coating for the profilecomposite parts having shadow zones.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139068413","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}
Pub Date : 2023-12-28DOI: 10.1134/s1052618823070245
A. N. Telykh, E. V. Chefanova
Abstract
The methodology and experimental results on the interaction of a rotor with the medium on the basis of comprehensive studies of the cohesive soil grinding process are considered. The methods of similarity and physical modeling of the executive device–medium system, as applied to remote executive devices, are described. A system of stand equipment for the soil mixing machines is proposed.
{"title":"A Comprehensive Approach to Studying the Grinding Capability of Rotary Executive Devices","authors":"A. N. Telykh, E. V. Chefanova","doi":"10.1134/s1052618823070245","DOIUrl":"https://doi.org/10.1134/s1052618823070245","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The methodology and experimental results on the interaction of a rotor with the medium on the basis of comprehensive studies of the cohesive soil grinding process are considered. The methods of similarity and physical modeling of the executive device–medium system, as applied to remote executive devices, are described. A system of stand equipment for the soil mixing machines is proposed.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139068472","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}
Pub Date : 2023-12-28DOI: 10.1134/s1052618823070117
I. S. Kartsev
Abstract
Practical work results on the development of an experimental stand for wear tests of millstones for grinding of grain are presented. When designing the stand, the method of testing for abrasive wear during friction against loosely fixed abrasive particles was used. A feature of the test bench is that the movable and fixed millstones are made cone-shaped and during testing are in oscillatory motion relative to the stationary stand platform. The test bench is equipped with a drive shaft speed sensor, a temperature sensor and a strain gauge force sensor. The Arduino IDE microcontroller software is used to process the incoming data. The software allows one to display the current values of the measured parameters on the screen of a personal computer monitor. All data are saved to files for further processing, which significantly reduces the time for experimental studies.
摘要 介绍了为磨碎谷物的磨石磨损试验开发试验台的实际工作成果。在设计试验台时,采用了在与松散固定的磨料颗粒摩擦过程中测试磨料磨损的方法。试验台的一个特点是活动磨石和固定磨石都是锥形的,在试验过程中相对于固定台架平台做摆动运动。测试台配备了传动轴速度传感器、温度传感器和应变仪力传感器。Arduino IDE 微控制器软件用于处理输入的数据。通过该软件,可以在个人电脑显示器的屏幕上显示测量参数的当前值。所有数据都保存到文件中,以便进一步处理,这大大缩短了实验研究的时间。
{"title":"Experimental Stand for Wear Tests of Millstones","authors":"I. S. Kartsev","doi":"10.1134/s1052618823070117","DOIUrl":"https://doi.org/10.1134/s1052618823070117","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Practical work results on the development of an experimental stand for wear tests of millstones for grinding of grain are presented. When designing the stand, the method of testing for abrasive wear during friction against loosely fixed abrasive particles was used. A feature of the test bench is that the movable and fixed millstones are made cone-shaped and during testing are in oscillatory motion relative to the stationary stand platform. The test bench is equipped with a drive shaft speed sensor, a temperature sensor and a strain gauge force sensor. The Arduino IDE microcontroller software is used to process the incoming data. The software allows one to display the current values of the measured parameters on the screen of a personal computer monitor. All data are saved to files for further processing, which significantly reduces the time for experimental studies.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139064017","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}
Pub Date : 2023-12-28DOI: 10.1134/s1052618823080162
I. S. Splavskiy
Abstract
The characteristics of thrust bearings used in NPP circulation pumps are presented and discussed. An analysis of the results of the tribological tests of new materials and coatings for solving the issues of the operability of friction units with hydrodynamic lubrication at high speeds and loads is given.
{"title":"Development and Optimization of High-Speed Loaded Axial Supports with Floating Sectors of Submersible Vane Pumps","authors":"I. S. Splavskiy","doi":"10.1134/s1052618823080162","DOIUrl":"https://doi.org/10.1134/s1052618823080162","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The characteristics of thrust bearings used in NPP circulation pumps are presented and discussed. An analysis of the results of the tribological tests of new materials and coatings for solving the issues of the operability of friction units with hydrodynamic lubrication at high speeds and loads is given.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139064071","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}
Pub Date : 2023-12-28DOI: 10.1134/s1052618823080101
D. U. Khasyanova
Abstract
Substantiation of the plane strain hypothesis of cylinders during the formation of a thermomechanical joint is presented.
摘要 介绍了热机械接头形成过程中圆柱体平面应变假说的实证。
{"title":"Substantiation of the Plane Strain Hypothesis of Cylinders during the Formation of a Thermo-Mechanical Joint","authors":"D. U. Khasyanova","doi":"10.1134/s1052618823080101","DOIUrl":"https://doi.org/10.1134/s1052618823080101","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Substantiation of the plane strain hypothesis of cylinders during the formation of a thermomechanical joint is presented.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139064023","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}
Pub Date : 2023-12-28DOI: 10.1134/s1052618823080083
S. V. Kartsev
Abstract
The results of experimental data and evaluation of the influence of the plasma gas composition on the properties of wear-resistant coatings deposited by various gas-thermal methods are presented. It is shown that, for the majority of existing types of wear-resistant coatings used in various branches of production, plasma sputtering of coatings using argon and nitrogen as the plasma-forming gas may replace the application of wear-resistant coatings using compressed air as the plasma-forming gas. At the same time, the use of a mixture of compressed air and hot hydrocarbons from the exhaust gases of a diesel internal combustion engine of a car as a plasma-forming gas during air-plasma sputtering should be carefully substantiated.
{"title":"Influence of the Composition of a Plasma-Forming Gas on the Properties of Wear-Resistant Coatings Applied by Gas-Thermal Methods","authors":"S. V. Kartsev","doi":"10.1134/s1052618823080083","DOIUrl":"https://doi.org/10.1134/s1052618823080083","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of experimental data and evaluation of the influence of the plasma gas composition on the properties of wear-resistant coatings deposited by various gas-thermal methods are presented. It is shown that, for the majority of existing types of wear-resistant coatings used in various branches of production, plasma sputtering of coatings using argon and nitrogen as the plasma-forming gas may replace the application of wear-resistant coatings using compressed air as the plasma-forming gas. At the same time, the use of a mixture of compressed air and hot hydrocarbons from the exhaust gases of a diesel internal combustion engine of a car as a plasma-forming gas during air-plasma sputtering should be carefully substantiated.</p>","PeriodicalId":642,"journal":{"name":"Journal of Machinery Manufacture and Reliability","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139064069","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}