Lubrication Analysis on the Profile of Slider in Reciprocating Compressor

Theoretical Analysis on the profile of slider in reciprocating compressor has been presented based on the hydrodynamic lubrication. Theoretical Analysis calculates fluid film pressure, attitude angle, frictional force, and minimum film thickness in normal condition for comparing two different profiles of slider. The calculated results show that the profile of slider plays an important role in the determination of the lubrication characteristics and the barrel type profile is more efficient from the viewpoint of lubrication. Introduction The slider in a reciprocating compressor undergoes an oscillatory motion in the shell when compressor operates and piston moves up and down along the axis of the cylinder. This oscillatory motion is usually small but very important to compressor performance and reliability. All the major concerns in design, such as frictional loss, noise and anti-wear life, are significantly related to the mutual dependence between the slide motion and lubrication. It is certainly needed, therefore, to develop and improve numerical analysis for better understanding and reliable prediction of slider motion, friction and lubrication at the slider-shell interface. In this paper, theoretical analysis on the profile of slider in reciprocating compressor has been presented based on the hydrodynamic lubrication. And the approach analyses shows fluid film pressure, attitude angle, frictional force, and minimum film thickness in normal condition to compare two different profiles of slider. F M h Force Moment Film Thickness Nomencalture cp J..l p Attitude Angle Viscosity Pressure