4.27 4.28 A journal bearing of 0.06 [m] diameter, 0.015 [m] length and 10 [um] clearance...

Transcribed Image Text:

4.27 4.28 A journal bearing of 0.06 [m] diameter, 0.015 [m] length and 10 [um] clearance operating at 1,000 [rpm] supports a load of 10 [kN]. Assuming isothermal conditions and optimal eccentricity ratio of = 0.7, find the oil dynamic viscosity needed to lubricate this bearing. (Ans. n = 0.043 [Pas]) For the bearing in problem 4.27, calculate oil flow and friction force. (Ans. Q = 3.3106 [m/s], F = 533.3 [N]) 4.27 4.28 A journal bearing of 0.06 [m] diameter, 0.015 [m] length and 10 [um] clearance operating at 1,000 [rpm] supports a load of 10 [kN]. Assuming isothermal conditions and optimal eccentricity ratio of = 0.7, find the oil dynamic viscosity needed to lubricate this bearing. (Ans. n = 0.043 [Pas]) For the bearing in problem 4.27, calculate oil flow and friction force. (Ans. Q = 3.3106 [m/s], F = 533.3 [N])