Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Tribologists and Lubrication Engineers
Journal Basic Information
Journal DOI :
The Korean Society of Tribologists and Lubrication Engineers
Editor in Chief :
Volume & Issues
Volume 19, Issue 6 - Dec 2003
Volume 19, Issue 5 - Oct 2003
Volume 19, Issue 4 - Aug 2003
Volume 19, Issue 3 - Jun 2003
Volume 19, Issue 2 - Apr 2003
Volume 19, Issue 1 - Feb 2003
Selecting the target year
A Lubrication Performance Analysis of Deep Straight Groove Mechanical Face Seal
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 311~320
In this study a general Galerkin FE formulation of the incompressible Reynolds equation is derived for lubrication analyses of noncontacting mechanical face seals. Then, the formulation is applied to analyze the flexibly mounted statortype reactor coolant pump seals of local nuclear power plants, which have deep straight grooves or plane coning on their primary seal ring faces. Their various lubrication performances have been predicted. Results show that the analyzed deep straight groove seal should have a net coning of less than 0.6 to satisfy the leakage limit. And for the same amount of equilibrium opening force the plane coning seal requires to have a 3 times higher dimensionless coning than the deep straight groove seal.
The Characteristics of Friction and Wear for Automotive Leaf Spring Materials
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 321~328
In the present study, the residual stresses can have a significant on the life of structural engineering components. Residual stresses are created by the surface treatment such as shot peening or deep rolling. The objective of this experimental investigation is to study the influence of friction and wear characteristics due to residual stress under dry sliding condition. Friction and wear data were obtained with a specially designed tribometer. Test specimens were made of SUP9 (leaf spring material) after they were created residual stress by shot peening treatment. Residual stress profiles were measured at surface by means of the Xray diffraction. Sliding tests were carried out different contact pressure and same sliding velocity 0.035 m/s (50 rpm). Leaf spring assembly test used to strain gauge sticked on leaf spring specimen in order to measure interleaf friction of leaf spring. Therefore, we were obtained hysteresis curve. As the residual stresses of surfaces increased, coefficient of friction and wear volume are decreased, but the residual stresses of surfaces are high, and consequently wear volume do not decreased. Coefficient of friction obtained from leaf spring assembly test is lower than that obtained from sliding test. From the results, structural engineering components reduce coefficient of friction and resistant wear in order to have residual stresses themselves.
Evaluation of Antiwear Performance of Mono/multilayer LB Molecular Films
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 329~334
The antiwear properties of amphiphilic monolayers and composite multilayer on silicon surface were investigated using microtribometer and Auger Electron Spectroscopy. LangmuirBlodgett (LB) monolayers from behenic acid, 2,4heneicosanedione(HD) and its lopper complex((HD)
Cu) were fabricated on silicon surface and the composite multilayer of 5bilayer of (HD)
Cu was fabricated on the surface of octadecyltrichlorosilane (OTS) selfassembled monolayer (SAM). We observed that LB monolayers and the composite multilayer exhibited a steady and excellent friction response when compared with the OTS SAM. These LB mono and multilayer also showed much higher wearresistance than the OTS SAM.
A Study on the Development of the Automatic PerformanceTestmachine for Power Steering Pump
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 335~341
Recently, the automotive industry is being developed rapidly. On this, a demand of high quality performancetestmachine is increased too. But it is progressive technology that must be combined hydraulic, mechanic and electronic technologies. To construct this system, the design of oil hydraulic circuit, interface skill between sensor and personal computer, data acquisition & display system and integrated control are very important skill. Moreover, reliable data is obtained with vacuum system and complex heat exchange system. Therefore, in this study, we designed a performancetestmachine by using above key technologies and we also made a integrated PC control system using personal computer which is more progressive and flexible method than PLC control.
A Study on the Noise Characteristics of Cylindrical Roller Bearings
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 342~348
The purpose of the paper is to investigate the noise characteristics of cylindrical roller bearings. For the sake of simplicity, it is assumed that the cylindrical roller bearing is infinitely long, and there is no outside force acting on the bearing. The effects of radial clearance of the bearing, viscosity of the lubricant and number of the roller on the noise of the bearing are also examined. Results show that the fundamental frequency of the bearing noise corresponds to the multiplication of number of the roller and whirling frequency of the roller center or the retainer. The acoustical frequency spectra of the roller bearing are pure tone spectra, containing the fundamental frequency of the bearing and its superharmonics. The low viscosity of the lubricant, high radial clearance of the bearing, and low number of the roller decrease the bearing noise. The results and discussions of the present paper could aid in the lownoise design of the cylindrical roller bearing.
Leakage and Rotordynamic Analysis of Damper Floating Ring Seal with RoundHole Surfaces in the High Pressure Turbo Pump
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 349~356
A damper floating ring seal with round hole pattern surfaces is suggested for better leakage control. The flat plate test of the round hole pattern surfaces has been performed to yield an empirical friction factor model. The exact predictions of the lockup position of the damper floating ring, the leakage performance, and the rotordynamic coefficients of the seal are necessary to evaluate the rotordynamic performance of the turbo pump unit. The governing equations including the empirical friction factor model for round hole pattern surfaces are solved by the Fast Fourier Transform method. The lockup position, leakage flow rate, and rotordynamic coefficients are evaluated according to the geometric parameters of the damper floating ring seal. Theoretical results show that the damper floating ring seals yield less leakage and better rotordynamic stability than the floating ring seal with a smooth surface.
Subsurface Stress Distribution beneath the Contact Surface of the Gear Teeth for Two Profile Models
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 357~364
The subsurface stress field beneath the gear's contact surface caused by the contact pressure in lubricated condition has been calculated. To evaluate the influence of the clearance shape on the stress field, two kinds of tooth profile models were chosen. One is the conventional cylinder contact model and the other is the new numerical model. Love's rectangular patch solution was used to obtain the subsurface stress field. The analysis results show that the subsurface stress is quite dependent on both the contact pressure and the profile model. The maximum effective stress of the new model is lower than that of the old model. The depth where the maximum effective stress occurs in the new model is not proportional to the intensity of the external load.
The Effect of Lubricants on the Tribological Characteristics
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 365~369
This paper presents an experiment of the characteristics of lubricating oils for refrigerating and air conditioning. We investgate influences of lubricating oils and additives on friction and wear by reciprocating type and pendulum type friction testers. The result shows that polyolesters have excellent friction characteristics and poor effect of additives. In contrast, polyvinylethers gave higher coefficient of friction, low wear amount and good effect of additives. We can see good relationship between the coefficients of friction in recipricating type and pendulum type friction testers.
A Study on the Acting Load in the Vane Tip of Vane Pump for Design
Journal of the Korean Society of Tribologists and Lubrication Engineers, volume 19, issue 6, 2003, Pages 370~375
The radial acting load of vane on the camring in oil hydraulic vane pumps with and without intravanes have been investigated. The influences of the discharge pressure and rotating speed of the vane to the load were discussed. The variations of the radial acting load of a vane were calculated on the basis of the results measured for the dynamic internal pressure in the four chambers surrounding a vane. It provides essential information for the study of pump dynamics and control, the pump design and the analysis of tribological problems in the sliding components.