The following data refer to a full hydrodynamic journal bearing. Radial load = 30 kN, Journal diameter = 75 mm, Bearing width = 75 mm, Radial clearance = 0.15 mm, Operating speed = 3600 rpm, Inlet temperature = 40 °C, the temperature – viscosity relationship is as follows Temp 40 41 42 43 44 45 46 47 48 (°C) 52.5 50 47.5 45 43 41 39 37.5 36 (cP) Assume that the total heat produced in the bearing is carried by the total oil flow. The specific gravity and specific heat of the lubricant are 0.86 and 1.76 kJ/kg °C respectively. Evaluate (1) minimum oil film thickness (2) power lost in friction (3) lubricant oil flow rate (4) outlet temperature of the lubricant.

The following data refer to a full hydrodynamic journal bearing. Radial load = 30 kN, Journal diameter = 75 mm, Bearing width = 75 mm, Radial clearance = 0.15 mm, Operating speed = 3600 rpm, Inlet temperature = 40 °C, the temperature – viscosity relationship is as follows Temp 40 41 42 43 44 45 46 47 48 (°C) 52.5 50 47.5 45 43 41 39 37.5 36 (cP) Assume that the total heat produced in the bearing is carried by the total oil flow. The specific gravity and specific heat of the lubricant are 0.86 and 1.76 kJ/kg °C respectively. Evaluate (1) minimum oil film thickness (2) power lost in friction (3) lubricant oil flow rate (4) outlet temperature of the lubricant.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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