Analysis of thermal effects on the misaligned hydraulic servo cylinder

The hydraulic servo cylinders with conical-cylindrical hydrobearing can obtain a high normal load carrying capacity at the shoulder length ratio n(s) = 0.8, and also avoid cylinder rod in collision with the sharp edge of conical surface. However, the effects of eccentricity and misalignment must be considered since aligning the centers of the hydraulic servo actuator with the applied mechanical load is concerned. In this study, eccentricity ratio is varied between 0 and 0.6 with misalignment factor up to 0.6 and 0.05 along the horizontal and vertical directions, respectively. Thermal effects that include isothermal, adiabatic and thermohydrodynamic boundary conditions on the bearing performance, such as pressure distribution, normal load carrying capacity and the frictional coefficient, are all examined herein. (C) 2001 Elsevier Science Ltd. All rights reserved.