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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Tribologists and Lubrication Engineers
Journal Basic Information
Journal DOI :
The Korean Society of Tribologists and Lubrication Engineers
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Volume & Issues
Volume 12, Issue 4 - Dec 1996
Volume 12, Issue 3 - Sep 1996
Volume 12, Issue 2 - Jun 1996
Volume 12, Issue 1 - Mar 1996
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대체냉매를 적용한 냉동공조기기의 개발 동향
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 1~7
Dynamic Behaviour of a Radial Compliant Crank Mechanism Used in Scroll Compressor
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 8~19
Scroll compressor using a slide bushing type radial compliant crank mechanism is modelled, and it's dynamic behaviour characteristics are analyzed. Sealing forces generated in the flank surfaces of the orbiting scroll depending on the distance, e, from slide bushing center to crank pin center are calculated. From the stable condition of orbiting scroll for the moment equilibrium in tangential direction, the range of e is determined as 0
. Transient response of a crankshaft supported by two journal bearings is investigated, considering applied load, moment, and unbalance force by eccentric mass. As a result, conical whirl mode with circular orbits are obtained. The characteristics of journal orbits and frictional losses are calculated with a variation of viscosity and bearing clearance.
A Study on te Dynamic Behavior of a Scroll Compressor Considering Tangential Leakage
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 20~31
Pressures in compression pockets consists of two identical spiral scrolls are influenced by gas flow resistance in discharge process and leakages in radial and tangential directions between two scroll wraps. In this paper, considering geometrical characteristics of these members, flow resistance and refrigerant gas leakage losses, pressure variations in compression pockets are calculated. For a scroll compressor model with fixed crank mechanism, acting load on crankshaft is analyzed. And, for a vertical type crankshaft-journal bearing system used in scroll compressor, nonlinear transient response is calculated including nonlinear fluid film reaction forces of journal bearings.
Friction and Wear Characteristics of Copper Alloy Fine Particles Contained in an Additive
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 32~40
The tribological role of copper alloy fine particles in an additive is not well known compared to solid lubricants such as
and PTFE. In this experimental investigation, a series of friction and wear test was undertaken to gain a better understanding of an additive containing copper alloy fine particles and to identify the effectiveness of copper alloy particles in improving tribological performance of the lubricant. Friction and wear of specimens under lubricated contact condition were studied and the worn surfaces were characterized by AES (Auger Electron Spectroscopy), SEM (Scanning Electron Microscopy) and optical microscopy. It was revealed that a copper-contained layer was formed and this layer resulted in considerable reduction in both friction and wear due to its lubricity and anti-wear property. The analysis of worn surface revealed that copper of the fine alloy particles in the additive helps healing the worn surface by plating and filling wear pits.
A Design of Self-Acting Air Lubricated Spindle
Song, Museok ; Jang, Dong-Seob ; Lee, Young-Ze ;
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 41~47
Rheological, Stability and Antiwear Properties of Water-in-Oil Emulsion Hydraulic Fluids
Shim, Joosup ; Cho, Wonoh ;
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 48~54
Evaluation of the Sliding Frictional Characteristics at the Different Loading Mechanisms and Normal Stiffness
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 55~64
Frictional characteristics with the change of loading method and normal stiffness at dry sliding surfaces were experimentally and theoretically evaluated in this study. For the study, a ball-on-disk typed test rig was built and implemented, which allowed a proper selection of loading mechanism and normal stiffness of the test rig. Loading method were varied from dead weight to pneumatic cylinder and spring loading, and the normal stiffness was varied by a spring of different stiffness. Test results showed that frictional characteristics at various loading methods were different even though the operating variables were the same. Discrepancy in the frictional characteristics, such as coefficient of friction and fluctuation in the normal load, were explained by the change in dynamic parameters of the test rigs. Results also showed that coefficient of friction, which defines as a ratio of frictional force divided a normal load, could be differently evaluated in the calculation when fluctuation in the normal load was significant.
The Analysis of Shaft Center Locus in the Refrigeration & Air-conditioning Rotary Compressor
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 12, issue 2, 1996, Pages 65~73
Rapid increase of Refrigeration and Air conditioning system in modem industries brings attention to the urgency of core technology development in the area. This paper presents theoretical investigation of the lubrication characteristics of rotary compressor for refrigeration and air conditioning. In order to analyze the lubrication characteristics of the main & sub bearing of rotary compressor, the bearing force and locus of shaft center are analyzed by the dynamic analysis of rotary compressor and numerical analysis of Reynolds equation as the operating condition is changed in various ways. In this paper, we used the Runge-Kutta method for the dynamic analysis of rotary compressor and the SOR (Successive OverRelaxation) method for the numerical analysis of Reynolds equation. The result shows that the operating condition of sub bearing is severer than that of main bearing, and eccentricity ratio grows as the bearing force increases. It is believed that the result can be applied to the design of alternative refrigerant rotary compressor.