WADI TUSAMBILA Valéry *1, CANBULUT Fazıl2, UYSAL Ünal3.

In axial piston pumps, increasing the temperature of lubricating oil causes undesirable conditions such as degradation of the thermophysical properties of the oil. Among these properties, the viscosity of lubricating oil varies proportionally with the temperature of the oil. Thus, beyond a definite temperature value, the oil no longer fulfills its lubrication function. The consequence is a mixed friction causing an overheating of the slipper, the deformation of the surfaces and finally the wear of the pump. However, temperature of slippers directly affects the lubricating oil temperature. In order to improve energy efficiency and lifetime of piston pump, the present study aims to investigate the influence of operating parameters on the temperature of hydrostatic
slipper bearing using a designed experimental set-up. Three different types of slippers were made in bid to observe the effect of slipper geometry on the temperature. This study outcomes show an increasing of the temperature of the slipper with increasing of supply pressure. It has also been found that an increase in the rotation speed induces an increase in the temperature of the slipper. Compared to the slipper- I, with diameter ration De/Di =1.422 and which reaches a temperature of 79°C under a pressure of 30 bar at rotation speed of 300 rpm, the slippers III and II with diameter ratios of 1.784 and 1.69 respectively presented geometries which better minimize the temperature increase of the slippers at 43°C and 47°C respectively under the same conditions. Téléchargé l'article