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
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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The following data refer to a full hydrodynamic journal bearing.
Radial load = 30 kN, Journal diameter = 75 mm, Bearing width = 75 mm, Radial
= 0.15 mm, Operating speed = 3600 rpm, Inlet temperature = 40 °C,
clearance
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.
Used the attached table.
Transcribed Image Text:The following data refer to a full hydrodynamic journal bearing. Radial load = 30 kN, Journal diameter = 75 mm, Bearing width = 75 mm, Radial = 0.15 mm, Operating speed = 3600 rpm, Inlet temperature = 40 °C, clearance 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. Used the attached table.
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