Fig. 4 shows the distributions of bush inner surface temperature in the case of rotation speed n=1000 r/min, n = 1800 r/min, n = 2800 r/min, andthe initial measured temperature is 18 . It shows that: in circumference, the temperature of angular coordinate (p - 340°, (p = 390° that is near the oil feed hole 1 ( 360°) is lower at dimensionless axial coordinate A = 0. 1 and A = 0. 5. It is because that the temperature of lubricating oil reduces with the entry of cold oil; The temperature near the oil return hole 3
(300°) and oil retuni hole I ( 420°) is larger at
dimensionless axial coordinate A = 0. 9.