Q3: A journal bearing utilized for a Marine steam engine as a main bearing has the following specifications: The bearing subjected for 30 KN force and it can be rotates 60000 revolutions per hour. The type of oil is SAE 20, for which the absolute viscosity at 60°C can be used with this bearing design; the ambient temperature of the bearing oil is 20°C and if rise of temperature of oil be limited to be as 12°C; the heat dissipation coefficient is 1232 W/m2/°C and the specific heat of oil is 1900 J/kg/C. The bearing length to its diameter can be taken as 1.2. See Table-A for more bearing design information. Determine the following: 1-A suitable bearing diameter (80 mm or 100 mm or 120 mm or 150 mm) and why?. 2- The coefficient of friction?. 3- Does the Journal bearing need for redesign or cooling, state the reasons?. 4- The mass of lubricating oil?.

Q3: A journal bearing utilized for a Marine steam engine as a main bearing has the following specifications: The bearing subjected for 30 KN force and it can be rotates 60000 revolutions per hour. The type of oil is SAE 20, for which the absolute viscosity at 60°C can be used with this bearing design; the ambient temperature of the bearing oil is 20°C and if rise of temperature of oil be limited to be as 12°C; the heat dissipation coefficient is 1232 W/m2/°C and the specific heat of oil is 1900 J/kg/C. The bearing length to its diameter can be taken as 1.2. See Table-A for more bearing design information. Determine the following: 1-A suitable bearing diameter (80 mm or 100 mm or 120 mm or 150 mm) and why?. 2- The coefficient of friction?. 3- Does the Journal bearing need for redesign or cooling, state the reasons?. 4- The mass of lubricating oil?.

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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