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Tribologia: Finnish Journal of Tribology最新文献

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TRIBOLOGICAL ASPECT OF ASSESSMENT OF EFFICIENCYOF FILTRATION USING MULTI-LAYER MATERIALS 多层材料过滤效率的摩擦学评价
Tribologia: Finnish Journal of Tribology Pub Date : 2021-11-30 DOI: 10.5604/01.3001.0015.5863
P. Mikołajczak, J. Szuszkiewicz
{"title":"TRIBOLOGICAL ASPECT OF ASSESSMENT OF EFFICIENCY\u0000OF FILTRATION USING MULTI-LAYER MATERIALS","authors":"P. Mikołajczak, J. Szuszkiewicz","doi":"10.5604/01.3001.0015.5863","DOIUrl":"https://doi.org/10.5604/01.3001.0015.5863","url":null,"abstract":"This study presents the results of testing for the efficiency and effectiveness of filtration using multi-layer filter\u0000materials, and briefly presents a new technology for manufacturing filter media using these materials. The first\u0000part of the article describes the causes of the formation of impurities in operating fluids and the tribological\u0000effects of their impact. The second part is dedicated to testing for filtration efficiency and effectiveness for\u0000different filter materials. The third part of the article briefly describes the technology for manufacturing filter\u0000media using efficient but difficult-to-form materials. The testing results showed significant differences in\u0000filtering efficiency and effectiveness between the cellulose samples and the samples of filter materials based\u0000on glass microfibre layers. All of the tested multi-layer materials allow filtration effectiveness of over 90% to\u0000be achieved over the entire range of impurity sizes included in the experiment. The results of a comparative\u0000test for pressure change during filtration also indicate that glass microfibre materials have a considerably\u0000longer operating life than cellulose materials. The time after which a sharp increase in pressure occurs (due\u0000to the filter layer being filled with impurities) is nearly four times longer for multi-layer materials than for\u0000cellulose materials. The methods for cutting, forming, and joining filter materials have been developed by the\u0000author of this article and implemented at the EXMOT company.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73857311","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
AN ANALYSIS OF THE INFLUENCE OF CARBONNANOPARTICLES ADDITIVE ON SELECTED PROPERTIESOF LUBRICATING OILS 纳米碳添加剂对润滑油性能影响的分析
Tribologia: Finnish Journal of Tribology Pub Date : 2021-11-30 DOI: 10.5604/01.3001.0015.5859
M. Frycz, Mateusz Labuda
{"title":"AN ANALYSIS OF THE INFLUENCE OF CARBON\u0000NANOPARTICLES ADDITIVE ON SELECTED PROPERTIES\u0000OF LUBRICATING OILS","authors":"M. Frycz, Mateusz Labuda","doi":"10.5604/01.3001.0015.5859","DOIUrl":"https://doi.org/10.5604/01.3001.0015.5859","url":null,"abstract":"This paper presents the results of an analysis of the influence of the addition of various types of carbon\u0000nanoparticles on selected essential physical and operational properties of lubricating oils. Two selected oils,\u0000i.e. the mineral base oil without additives and the typical marine lubricating circulating oil Marinol RG 1240,\u0000were modified with the addition of shungite nanoparticles, graphite nanotubes, and C60 fullerenes. The mass\u0000fraction of modifiers was 0.2% wt for each of the additives. As part of the experimental tests, measurements\u0000were made of the impact of the above-mentioned modifiers on the change in the value of the ignition\u0000temperature of oils, the effect on the changes in the value of the dynamic viscosity coefficient in the aspect of\u0000changes of temperature and shear rate, as well as the impact on the changes in the friction coefficient and the\u0000size of the wear size scar. These tests were carried out on an EraFlash automatic apparatus for determining\u0000ignition temperature using the closed cup method, with a Haake Mars III research rheometer, and a T-02U\u0000tribometer with a four-ball head.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90575021","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
ASSESSMENT OF ABRASIVE WEAR RATE FOR PTFE-BASEDCOMPOSITES IN COMBINATION WITH STEEL 聚四氟乙烯基复合材料与钢复合材料磨料磨损率的评定
Tribologia: Finnish Journal of Tribology Pub Date : 2021-11-30 DOI: 10.5604/01.3001.0015.5861
M. Lemecha, K. Ligier, J. Napiórkowski
{"title":"ASSESSMENT OF ABRASIVE WEAR RATE FOR PTFE-BASED\u0000COMPOSITES IN COMBINATION WITH STEEL","authors":"M. Lemecha, K. Ligier, J. Napiórkowski","doi":"10.5604/01.3001.0015.5861","DOIUrl":"https://doi.org/10.5604/01.3001.0015.5861","url":null,"abstract":"This paper presents a study of the tribological wear rate for PTFE-based composites in combination with\u0000C45 steel. PTFE composites with the addition of glass fibre, bronze, carbon fibre, and graphite were selected\u0000for the study. Tribological tests were conducted in a roller-block combination over an expanded contact area\u0000with no lubrication, using an SMC-2 machine. The study assessed the mass and volumetric wear for the\u0000test materials and the wear rate index. The highest wear values were noted for the PTFE composite with the\u0000addition of bronze, while the lowest was for the PTFE composite with the addition of glass fibre. For all the\u0000test materials, the formation of a polymer film on the steel counter specimen was noted.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86653196","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
A DISCUSSION ON THE PHYSICAL INTERPRETATIONOF MEASUREMENTS OF TRIBOLOGICAL WEAR 摩擦学磨损测量的物理解释讨论
Tribologia: Finnish Journal of Tribology Pub Date : 2021-10-31 DOI: 10.5604/01.3001.0015.4898
Jan Sadowski
{"title":"A DISCUSSION ON THE PHYSICAL INTERPRETATION\u0000OF MEASUREMENTS OF TRIBOLOGICAL WEAR","authors":"Jan Sadowski","doi":"10.5604/01.3001.0015.4898","DOIUrl":"https://doi.org/10.5604/01.3001.0015.4898","url":null,"abstract":"Physical sense and practical significance of major measurements of tribological wear are analysed here.\u0000Definitions and methods of assessing these measurements are proposed on the basis of the laws of energy\u0000and mass conservation. Contributions of energy and displacement of particular friction forces corresponding\u0000to each element of a friction couple are addressed. Energy expenditure that causes wear is introduced into\u0000the definition of wear resistance. Planning and thermodynamic analysis of a tribological experiment and the\u0000application of thermodynamic concepts and quantities to the description and the interpretation of results\u0000are recommended. The author believes application of wear measures that have an unequivocal physical\u0000interpretation will limit problems with the incomparability and the irreproducibility of tribological results and\u0000issues with transferring them to real objects.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88460402","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: 1
THE EFFECT OF THE WEAR DEGREE OF WORKING ELEMENTSIN A JAW CRUSHER ON THE OPERATING EFFECTIVENESSOF A TWO-STAGE GRANITE GRINDING SYSTEM 颚式破碎机工作元件磨损程度对两段花岗岩粉碎系统工作效率的影响
Tribologia: Finnish Journal of Tribology Pub Date : 2021-10-31 DOI: 10.5604/01.3001.0015.4894
Mateusz Dziubek, D. Grygier
{"title":"THE EFFECT OF THE WEAR DEGREE OF WORKING ELEMENTS\u0000IN A JAW CRUSHER ON THE OPERATING EFFECTIVENESS\u0000OF A TWO-STAGE GRANITE GRINDING SYSTEM","authors":"Mateusz Dziubek, D. Grygier","doi":"10.5604/01.3001.0015.4894","DOIUrl":"https://doi.org/10.5604/01.3001.0015.4894","url":null,"abstract":"The article presents an analysis of the influence of the wear degree of working elements in a jaw crusher on\u0000the crushing process and on the quality of the crushed material. The evaluation of the operating effectiveness\u0000of a technological system comprising two crushers was based on the quality indicator of the crushed product,\u0000i.e. on the share of irregular grains for a fraction with a mean grain size of 31.5/63 mm at each of the two\u0000stages of crushing. The wear degree was monitored by performing microscopic observations of the plates in\u0000the fixed jaw and by measuring the critical geometric characteristics of the crusher, e.g., tooth height, jaw size,\u0000and discharge opening size, during the entire service life of the crusher.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87219241","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: 1
METHOD OF RESEARCH ON THE DYNAMIC VISCOSITYOF MAGNETIC FLUIDS AT HIGH SHEAR RATE 高剪切速率下磁流体动态粘度的研究方法
Tribologia: Finnish Journal of Tribology Pub Date : 2021-10-31 DOI: 10.5604/01.3001.0015.4900
M. Szczęch, W. Horak
{"title":"METHOD OF RESEARCH ON THE DYNAMIC VISCOSITY\u0000OF MAGNETIC FLUIDS AT HIGH SHEAR RATE","authors":"M. Szczęch, W. Horak","doi":"10.5604/01.3001.0015.4900","DOIUrl":"https://doi.org/10.5604/01.3001.0015.4900","url":null,"abstract":"Magnetic fluids have an important position in the design of technical systems due to their unique properties.\u0000They are used primarily in mechanical energy dissipation systems, i.e. brakes and vibration dampers, as well\u0000as in the design of seals. In many applications, the magnetic fluid operates at high flow velocities through\u0000narrow slots. Therefore, there is a need to determine the rheological properties of this type of substance at\u0000high shear rates. Due to the high density of magnetic fluids and the associated occurrence of mass forces, as\u0000well as the requirements regarding the distribution of the magnetic field, the measurement of the viscosity of\u0000magnetic fluids at high shear rates is extremely difficult when conventional measuring systems are used. The\u0000paper presents a proposal for a new measuring system and a method to determine the viscosity of magnetic\u0000fluids at high shear rates, as well as the results of research on the possibility of using the presented structure\u0000in the case of ferrofluids.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84066196","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
METHOD OF MEASURING FRICTIONAL RESISTANCEIN PENDULAR MOTION 钟摆运动中摩擦阻力的测量方法
Tribologia: Finnish Journal of Tribology Pub Date : 2021-10-31 DOI: 10.5604/01.3001.0015.4895
Mariusz Opałka
{"title":"METHOD OF MEASURING FRICTIONAL RESISTANCE\u0000IN PENDULAR MOTION","authors":"Mariusz Opałka","doi":"10.5604/01.3001.0015.4895","DOIUrl":"https://doi.org/10.5604/01.3001.0015.4895","url":null,"abstract":"This paper presents a methodology for conducting tribological sliding tests based on decaying vibrations\u0000in pendular motion. The proposed method of determining the (averaged) coefficient of friction in pendular\u0000motion is based on measuring the potential kinetic energy. The method is characterized by a short measuring\u0000time and enables a quick comparison of the friction coefficients of different materials.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78985747","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
INFLUENCE OF THE DYNAMICS OF FORCED MOTIONON THE STATIC FRICTION IN METAL-POLYMER SLIDING PAIRS 强迫运动动力学对金属-聚合物滑动副静摩擦的影响
Tribologia: Finnish Journal of Tribology Pub Date : 2021-10-31 DOI: 10.5604/01.3001.0015.4897
Mariusz Opałka, W. Wieleba, Angelika Radzińska
{"title":"INFLUENCE OF THE DYNAMICS OF FORCED MOTION\u0000ON THE STATIC FRICTION IN METAL-POLYMER SLIDING PAIRS","authors":"Mariusz Opałka, W. Wieleba, Angelika Radzińska","doi":"10.5604/01.3001.0015.4897","DOIUrl":"https://doi.org/10.5604/01.3001.0015.4897","url":null,"abstract":"The resistance during the frictional interaction of polymeric materials with metallic materials is characterized\u0000by a significant dependence on the dynamics of the motion inputs. In a metal-polymer friction pair, the static\u0000friction resistance during standstill under load depends on the rate of growth of the force causing the relative\u0000motion. Tribological tests of selected (polymer-metal) sliding pairs were carried out. The selected polymers\u0000were polyurethane (TPU), polysulfone (PSU), and silicone rubber (SI). They interacted with a pin made of\u0000normalized C45 steel under unitary pressure p = 0.5 MPa in dry friction conditions at different gradients\u0000of the force driving the relative motion (dF/dt = 0.1-20 [N/s]). The static friction coefficient of the selected\u0000sliding pairs was determined on the basis of the recorded static friction force values. The test results show\u0000a significant influence of the rate of increase in the motion driving force on the values of static friction\u0000resistance. This is mainly due to the viscoelastic properties of polymers.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85614710","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: 1
STATIC CHARACTERISTICS OF OFFSET 8-LOBE JOURNALBEARINGS 偏置8叶轴颈轴承的静态特性
Tribologia: Finnish Journal of Tribology Pub Date : 2021-10-31 DOI: 10.5604/01.3001.0015.4899
S. Strzelecki
{"title":"STATIC CHARACTERISTICS OF OFFSET 8-LOBE JOURNAL\u0000BEARINGS","authors":"S. Strzelecki","doi":"10.5604/01.3001.0015.4899","DOIUrl":"https://doi.org/10.5604/01.3001.0015.4899","url":null,"abstract":"The 8-lobe journal bearings have found application in the bearing systems of spindles of grinding machines.\u0000The design of bearings and the large number of lobes and oil grooves assures good cooling conditions of\u0000bearing. These bearings can be manufactured as the bearings with cylindrical, non-continuous operating\u0000surfaces separated by six lubricating grooves, bearings with the pericycloidal shape of the bearing bore, and\u0000as offset journal bearing.\u0000This paper presents the results of the computation of static characteristics of an offset 8-lobe journal bearing\u0000operating under the conditions of an aligned axis of journal and bush, adiabatic oil film, and at the static\u0000equilibrium position of journal. Different values of bearing length to diameter ratio, relative clearance, and\u0000lobe relative clearance were assumed. Reynolds' energy and viscosity equations were solved by means of an\u0000iterative procedure. Adiabatic oil film, laminar flow in the bearing gap, and aligned orientation of journal in\u0000the bearing were considered.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88501041","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
FRICTION FORCE OF THE NATURAL LEATHER CUTTINGPROCESS 天然皮革切割过程中的摩擦力
Tribologia: Finnish Journal of Tribology Pub Date : 2019-12-31 DOI: 10.5604/01.3001.0013.7772
J. Przepiórka
{"title":"FRICTION FORCE OF THE NATURAL LEATHER CUTTING\u0000PROCESS","authors":"J. Przepiórka","doi":"10.5604/01.3001.0013.7772","DOIUrl":"https://doi.org/10.5604/01.3001.0013.7772","url":null,"abstract":"Cutting natural leather is a first stage of a technological process of leather goods. It consists of dividing flat\u0000materials into shoe components. Cutting can be done by hand or mechanically. Cutters are the main cutting\u0000device in mechanical process. During utilization of cutters, the durability of its usage is an important issue.\u0000To increase its endurance, optimal force conditions are required. These depend on the following: the friction\u0000coefficient between cutting machine and cut material, the angle of sharpening of cutter, the blunting of the\u0000edge, using a cutting pad, and the type and kind of steel of which is produced. Friction is a component of\u0000a cutting force and its value depends on several factors, one of which is shape of the cutter. It is a parameter\u0000often ignored in the literature; however, according to the studies conducted by the authors, the value of the\u0000friction during cutting depends on the shape of the cutter. In this study, results of force value measurements\u0000required to cut elements of different shapes with equal circumferences with steel cutters are presented.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"243 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74492940","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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