HLEBANJA, Gorazd ;HLEBANJA, Jože . Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities. Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 43, n.5-6, p. 184-192, november 2017. ISSN 0039-2480. Available at: <https://www.sv-jme.eu/sl/article/testing-of-surface-endurance-in-rolling-sliding-friction-at-low-velocities/>. Date accessed: 20 dec. 2024. doi:http://dx.doi.org/.
Hlebanja, G., & Hlebanja, J. (1997). Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities. Strojniški vestnik - Journal of Mechanical Engineering, 43(5-6), 184-192. doi:http://dx.doi.org/
@article{.,
author = {Gorazd Hlebanja and Jože Hlebanja},
title = {Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {43},
number = {5-6},
year = {1997},
keywords = {surface contact; rolling sliding contact; gear trains; surface endurance; },
abstract = {Rolling-sliding contact is one of the basic ways in which two surfaces are in an interaction; it is present in the most diverse compositions. Such contacts are even more interesting if such a process is slow, because these contacts are essentially different from fast contacts both with regard to oil film building and to wear mechanism. The most characteristic are slow gear trains which are in use, e.g. in cement-mills, in the oil industry, in elevator transmissions, etc. Such slow gears are subjected to a wear process, whose consequence are changes in tooth flank shape and a subsequent deterioration of its kinematic properties. Since they are, as a rule, components of excessive dimensions, their repair is also more laborious and expensive. A rating method for gears operating in such working conditions has not yet been well defined, which is why the necessary research work is even more justified. Since lowering friction, and any sort of wear, is in its essence an important economic problem, there have been and still are being conducted numerous, extensive investigations of wear and surface damages in rolling-sliding circumstances, particularly at higher speeds. Because of the essential differences between fast and slow contacts we cannot simply extrapolate this research to our case. When velocities are low, heat originating in surface friction has enough time for being conveyed into the surround and into the substrate. That is why the rise of temperature caused by friction on sliding surfaces at low velocities is negligible, but it has an important or even prevailing influence when velocities are higher. A higher temperature substantially influences the lubricating oil film viscosity as well. The oil film thickness is strongly dependent on the velocity of the sliding surfaces. It becomes thicker with higher velocities, therefore in such case there usually exists an elasto-hydrodynamic lubrication, whereas at low velocities a mixed lubrication prevails. These are the main reasons why, for evaluation of wear in slow sliding-rolling contacts, we cannot use results which are valid for fast contacts. Hence, new efforts are being made to form an adequate rating method fo r slow running gears [1-5] in numerous institutions all over the world. Our starting goal was to describe existence of adhesive wear on slowly running surfaces. For this purpose we developed our testing arrangement and conducted experiments with disk pairs made of cast steel GS 52 (DIN). Comparable pairs are often used for large, slowly running gears.},
issn = {0039-2480}, pages = {184-192}, doi = {},
url = {https://www.sv-jme.eu/sl/article/testing-of-surface-endurance-in-rolling-sliding-friction-at-low-velocities/}
}
Hlebanja, G.,Hlebanja, J. 1997 November 43. Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 43:5-6
%A Hlebanja, Gorazd %A Hlebanja, Jože %D 1997 %T Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities %B 1997 %9 surface contact; rolling sliding contact; gear trains; surface endurance; %! Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities %K surface contact; rolling sliding contact; gear trains; surface endurance; %X Rolling-sliding contact is one of the basic ways in which two surfaces are in an interaction; it is present in the most diverse compositions. Such contacts are even more interesting if such a process is slow, because these contacts are essentially different from fast contacts both with regard to oil film building and to wear mechanism. The most characteristic are slow gear trains which are in use, e.g. in cement-mills, in the oil industry, in elevator transmissions, etc. Such slow gears are subjected to a wear process, whose consequence are changes in tooth flank shape and a subsequent deterioration of its kinematic properties. Since they are, as a rule, components of excessive dimensions, their repair is also more laborious and expensive. A rating method for gears operating in such working conditions has not yet been well defined, which is why the necessary research work is even more justified. Since lowering friction, and any sort of wear, is in its essence an important economic problem, there have been and still are being conducted numerous, extensive investigations of wear and surface damages in rolling-sliding circumstances, particularly at higher speeds. Because of the essential differences between fast and slow contacts we cannot simply extrapolate this research to our case. When velocities are low, heat originating in surface friction has enough time for being conveyed into the surround and into the substrate. That is why the rise of temperature caused by friction on sliding surfaces at low velocities is negligible, but it has an important or even prevailing influence when velocities are higher. A higher temperature substantially influences the lubricating oil film viscosity as well. The oil film thickness is strongly dependent on the velocity of the sliding surfaces. It becomes thicker with higher velocities, therefore in such case there usually exists an elasto-hydrodynamic lubrication, whereas at low velocities a mixed lubrication prevails. These are the main reasons why, for evaluation of wear in slow sliding-rolling contacts, we cannot use results which are valid for fast contacts. Hence, new efforts are being made to form an adequate rating method fo r slow running gears [1-5] in numerous institutions all over the world. Our starting goal was to describe existence of adhesive wear on slowly running surfaces. For this purpose we developed our testing arrangement and conducted experiments with disk pairs made of cast steel GS 52 (DIN). Comparable pairs are often used for large, slowly running gears. %U https://www.sv-jme.eu/sl/article/testing-of-surface-endurance-in-rolling-sliding-friction-at-low-velocities/ %0 Journal Article %R %& 184 %P 9 %J Strojniški vestnik - Journal of Mechanical Engineering %V 43 %N 5-6 %@ 0039-2480 %8 2017-11-11 %7 2017-11-11
Hlebanja, Gorazd, & Jože Hlebanja. "Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities." Strojniški vestnik - Journal of Mechanical Engineering [Online], 43.5-6 (1997): 184-192. Web. 20 Dec. 2024
TY - JOUR AU - Hlebanja, Gorazd AU - Hlebanja, Jože PY - 1997 TI - Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities JF - Strojniški vestnik - Journal of Mechanical Engineering DO - KW - surface contact; rolling sliding contact; gear trains; surface endurance; N2 - Rolling-sliding contact is one of the basic ways in which two surfaces are in an interaction; it is present in the most diverse compositions. Such contacts are even more interesting if such a process is slow, because these contacts are essentially different from fast contacts both with regard to oil film building and to wear mechanism. The most characteristic are slow gear trains which are in use, e.g. in cement-mills, in the oil industry, in elevator transmissions, etc. Such slow gears are subjected to a wear process, whose consequence are changes in tooth flank shape and a subsequent deterioration of its kinematic properties. Since they are, as a rule, components of excessive dimensions, their repair is also more laborious and expensive. A rating method for gears operating in such working conditions has not yet been well defined, which is why the necessary research work is even more justified. Since lowering friction, and any sort of wear, is in its essence an important economic problem, there have been and still are being conducted numerous, extensive investigations of wear and surface damages in rolling-sliding circumstances, particularly at higher speeds. Because of the essential differences between fast and slow contacts we cannot simply extrapolate this research to our case. When velocities are low, heat originating in surface friction has enough time for being conveyed into the surround and into the substrate. That is why the rise of temperature caused by friction on sliding surfaces at low velocities is negligible, but it has an important or even prevailing influence when velocities are higher. A higher temperature substantially influences the lubricating oil film viscosity as well. The oil film thickness is strongly dependent on the velocity of the sliding surfaces. It becomes thicker with higher velocities, therefore in such case there usually exists an elasto-hydrodynamic lubrication, whereas at low velocities a mixed lubrication prevails. These are the main reasons why, for evaluation of wear in slow sliding-rolling contacts, we cannot use results which are valid for fast contacts. Hence, new efforts are being made to form an adequate rating method fo r slow running gears [1-5] in numerous institutions all over the world. Our starting goal was to describe existence of adhesive wear on slowly running surfaces. For this purpose we developed our testing arrangement and conducted experiments with disk pairs made of cast steel GS 52 (DIN). Comparable pairs are often used for large, slowly running gears. UR - https://www.sv-jme.eu/sl/article/testing-of-surface-endurance-in-rolling-sliding-friction-at-low-velocities/
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author = {Hlebanja, G., Hlebanja, J.},
title = {Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {43},
number = {5-6},
year = {1997},
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TY - JOUR AU - Hlebanja, Gorazd AU - Hlebanja, Jože PY - 2017/11/11 TI - Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities JF - Strojniški vestnik - Journal of Mechanical Engineering; Vol 43, No 5-6 (1997): Strojniški vestnik - Journal of Mechanical Engineering DO - KW - surface contact, rolling sliding contact, gear trains, surface endurance, N2 - Rolling-sliding contact is one of the basic ways in which two surfaces are in an interaction; it is present in the most diverse compositions. Such contacts are even more interesting if such a process is slow, because these contacts are essentially different from fast contacts both with regard to oil film building and to wear mechanism. The most characteristic are slow gear trains which are in use, e.g. in cement-mills, in the oil industry, in elevator transmissions, etc. Such slow gears are subjected to a wear process, whose consequence are changes in tooth flank shape and a subsequent deterioration of its kinematic properties. Since they are, as a rule, components of excessive dimensions, their repair is also more laborious and expensive. A rating method for gears operating in such working conditions has not yet been well defined, which is why the necessary research work is even more justified. Since lowering friction, and any sort of wear, is in its essence an important economic problem, there have been and still are being conducted numerous, extensive investigations of wear and surface damages in rolling-sliding circumstances, particularly at higher speeds. Because of the essential differences between fast and slow contacts we cannot simply extrapolate this research to our case. When velocities are low, heat originating in surface friction has enough time for being conveyed into the surround and into the substrate. That is why the rise of temperature caused by friction on sliding surfaces at low velocities is negligible, but it has an important or even prevailing influence when velocities are higher. A higher temperature substantially influences the lubricating oil film viscosity as well. The oil film thickness is strongly dependent on the velocity of the sliding surfaces. It becomes thicker with higher velocities, therefore in such case there usually exists an elasto-hydrodynamic lubrication, whereas at low velocities a mixed lubrication prevails. These are the main reasons why, for evaluation of wear in slow sliding-rolling contacts, we cannot use results which are valid for fast contacts. Hence, new efforts are being made to form an adequate rating method fo r slow running gears [1-5] in numerous institutions all over the world. Our starting goal was to describe existence of adhesive wear on slowly running surfaces. For this purpose we developed our testing arrangement and conducted experiments with disk pairs made of cast steel GS 52 (DIN). Comparable pairs are often used for large, slowly running gears. UR - https://www.sv-jme.eu/sl/article/testing-of-surface-endurance-in-rolling-sliding-friction-at-low-velocities/
Hlebanja, Gorazd, AND Hlebanja, Jože. "Testing of Surface Endurance in Rolling-Sliding Friction at Low Velocities" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 43 Number 5-6 (11 November 2017)
Strojniški vestnik - Journal of Mechanical Engineering 43(1997)5-6, 184-192
© The Authors, CC-BY 4.0 Int. Change in copyright policy from 2022, Jan 1st.
Rolling-sliding contact is one of the basic ways in which two surfaces are in an interaction; it is present in the most diverse compositions. Such contacts are even more interesting if such a process is slow, because these contacts are essentially different from fast contacts both with regard to oil film building and to wear mechanism. The most characteristic are slow gear trains which are in use, e.g. in cement-mills, in the oil industry, in elevator transmissions, etc. Such slow gears are subjected to a wear process, whose consequence are changes in tooth flank shape and a subsequent deterioration of its kinematic properties. Since they are, as a rule, components of excessive dimensions, their repair is also more laborious and expensive. A rating method for gears operating in such working conditions has not yet been well defined, which is why the necessary research work is even more justified. Since lowering friction, and any sort of wear, is in its essence an important economic problem, there have been and still are being conducted numerous, extensive investigations of wear and surface damages in rolling-sliding circumstances, particularly at higher speeds. Because of the essential differences between fast and slow contacts we cannot simply extrapolate this research to our case. When velocities are low, heat originating in surface friction has enough time for being conveyed into the surround and into the substrate. That is why the rise of temperature caused by friction on sliding surfaces at low velocities is negligible, but it has an important or even prevailing influence when velocities are higher. A higher temperature substantially influences the lubricating oil film viscosity as well. The oil film thickness is strongly dependent on the velocity of the sliding surfaces. It becomes thicker with higher velocities, therefore in such case there usually exists an elasto-hydrodynamic lubrication, whereas at low velocities a mixed lubrication prevails. These are the main reasons why, for evaluation of wear in slow sliding-rolling contacts, we cannot use results which are valid for fast contacts. Hence, new efforts are being made to form an adequate rating method fo r slow running gears [1-5] in numerous institutions all over the world. Our starting goal was to describe existence of adhesive wear on slowly running surfaces. For this purpose we developed our testing arrangement and conducted experiments with disk pairs made of cast steel GS 52 (DIN). Comparable pairs are often used for large, slowly running gears.