The effect on oil intake temperature at dynamicaly loaded radial journal bearings performance

İçten yanmalı benzinli ve dizel motorlarında, uçak motorlarında, kompresörlerde, pistonlu pompalarda, eksantrik presleri ve hadde merdaneleri gibi pek çok makinalarda milleri yataklamak için kullanılan radyal kaymalı yatakların, dinamik yük altında, farklı yağ giriş sıcaklıklarında gösterdiği performans yatak tasarımcıları açısından oldukça önemlidir. Bu çalışmada, önceden deneysel olarak belirlenen bir dinamik yük örneği (polar yatak yükü) kullanılmıştır. Yatak yükü ve diğer yatak parametreleri sabit kalmak şartıyla, yalnızca yatağa gönderilen yağın sıcaklığı $20^ oC, 40^ oC ve 60^ oC$ olarak alındığında yatağın performansında nasıl bir değişiklik olacağı araştırılmıştır. Sonuçlar irdelenerek yatak tasarımcılarına, yağ giriş sıcaklığı değişiminin yatak performansı üzerindeki etkileri konusunda pratik bilgi sunulmuştur.The performance that radial journal bearings, used for the bearing of many machines such as internal combustion gasoline and diesel engines, aeroplane engines, compressors, plunger pumps, eccentric presses and rolling cylinders, show under dynamic load and at different oil intake temperatures, is very much important for bearing designers. In this study, a dynamic load sample (polar bearing load) which was experimentally defined before was used. How the performance of bearing would be was investigated in the study, so long as bearing load and other bearing parameters stay stable, and when the temperature of oil poured only on bearing is designated as 20, 40 and 60 centigrade degrees. By analyzing results, bearing designers were given practical information about the effects of oil intake temperature change on the performance of bearing

An experimental investigation on frictional behavior of statically loaded micro-grooved journal bearing

WOS: 000297824800040Performances of plain and micro-grooved engine journal bearings were investigated in this study. Numerous experiments were performed under different static loads by using the purpose-built journal bearing test rig. Micro-grooves were made by cutting micro-channels both around and across the engine journal bearing surfaces. Stribeck curves for the micro-grooved and the plain journal bearings were then experimentally and theoretically generated while frictional torque versus angular velocity curves were also plotted. The results showed that the highest value of coefficient of friction as well as the frictional torque was obtained on the transversal micro-grooved journal bearings. (C) 2011 Elsevier Ltd. All rights reserved.Karadeniz Technical University [2002.112.003.03]This work was supported by the Research Fund of Karadeniz Technical University, Project number; 2002.112.003.03