You are asked to design a plain surface journal bearing to carry a steady radial load of 5.25 kN while the shaft rotates at 1080 rpm. The shaft stress analysis determines that an acceptable diameter of the journal is ds 62.5+0.000 '-0.050 mm, a bushing with a diameter dn = 62.6±8:308 mm, and an l/d ratio is 1.. We shall use +0.100 -0.000 %3D SAE 40 oil as a lubricant, at an inlet temperature of 45 °C. The shaft is part of a machine requiring good precision, so for a minimum radial clearance (Cmin) analyze the hypothetical bearing, O Determine the operating temperature Tave, and operating viscosity Have-. ) Determine the minimum film thickness, ho, temperature rise of the lubricant, ATc, the total oil flow, Q, and side flow Qs in [mm3/s], the maximum film pressure Pmax developed in [MPa].

You are asked to design a plain surface journal bearing to carry a steady radial load of 5.25 kN while the shaft rotates at 1080 rpm. The shaft stress analysis determines that an acceptable diameter of the journal is ds 62.5+0.000 '-0.050 mm, a bushing with a diameter dn = 62.6±8:308 mm, and an l/d ratio is 1.. We shall use +0.100 -0.000 %3D SAE 40 oil as a lubricant, at an inlet temperature of 45 °C. The shaft is part of a machine requiring good precision, so for a minimum radial clearance (Cmin) analyze the hypothetical bearing, O Determine the operating temperature Tave, and operating viscosity Have-. ) Determine the minimum film thickness, ho, temperature rise of the lubricant, ATc, the total oil flow, Q, and side flow Qs in [mm3/s], the maximum film pressure Pmax developed in [MPa].

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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Question

You are asked to design a plain surface journal bearing to carry a steady radial load
of 5.25 kN while the shaft rotates at 1080 rpm. The shaft stress analysis
determines that an acceptable diameter of the journal is ds
62.5+0.000
-0.050 mm, а
bushing with a diameter dn = 62.61800 mm, and an l/d ratio is 1.. We shall use
+0.100
SAE 40 oil as a lubricant, at an inlet temperature of 45 °C. The shaft is part of a
machine requiring good precision, so for a minimum radial clearance (Cmin) analyze
the hypothetical bearing,
a)
Determine the operating temperature Tave, and operating viscosity Have-
b)
Determine the minimum film thickness, ho, temperature rise of the lubricant, ATc, the
total oil flow, Q, and side flow Qs in [mm3/s], the maximum film pressure Pmax
developed in [MPa].

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