You are asked to design a plain surface journal bearing to carry a steady radial load of 5.75 kN while the shaft rotates at 950 rpm. The shaft stress analysis determines that an acceptable nominal diameter of the journal is 62.5-mm and an l/d ratio is 1. The shaft is part of a machine requiring good precision. So a minimum radial clearance Cmin = 0.040 mm seems appropriate. We shall use SAE 30 oil as a lubricant, at an inlet temperature of 45 °C. Analyze the hypothetical bearing, a) Determine the operating temperature Tave, and operating viscosity µave. 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]. c) Determine the power loss, Hloss in [W], friction torque, Tr in [N-m] d) For minimum radial clearances, perform a design assessment using Trumpler's criteria. Do include, Q-1 1- Solution steps and steps of trial-and-error approches, as used. 2- References for the items used from Shigley or other sources, such as: Figure or design chart and/or Table numbers, equations or rules or principles, whenever refered to.

You are asked to design a plain surface journal bearing to carry a steady radial load of 5.75 kN while the shaft rotates at 950 rpm. The shaft stress analysis determines that an acceptable nominal diameter of the journal is 62.5-mm and an l/d ratio is 1. The shaft is part of a machine requiring good precision. So a minimum radial clearance Cmin = 0.040 mm seems appropriate. We shall use SAE 30 oil as a lubricant, at an inlet temperature of 45 °C. Analyze the hypothetical bearing, a) Determine the operating temperature Tave, and operating viscosity µave. 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]. c) Determine the power loss, Hloss in [W], friction torque, Tr in [N-m] d) For minimum radial clearances, perform a design assessment using Trumpler's criteria. Do include, Q-1 1- Solution steps and steps of trial-and-error approches, as used. 2- References for the items used from Shigley or other sources, such as: Figure or design chart and/or Table numbers, equations or rules or principles, whenever refered to.

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

See similar textbooks

Similar questions

2
A machine with rational sections and subsystems is better than one that doesn't have either.
.
Explain the PROBLEM-SOLVING TECHNIQUE .
i need the answer quickly
2. A small system requires 0.875 in.w. total pressure at a flow rate of 1420 cfm and outlet air speed velocity of 2000 fu/min. a) Select the suitable smallest size belt drive fan b) Sketch the system and fan characteristics showing the operating point c) Specify the fan speed (rpm) and the power (bhp) d) Calculate the motor power, kW e) Specify the required fan pulley diameter for 6" drive pulley diameter
If a machine has a mechanical advantage of 4 and ideal mechanical advantage of 6, then its efficiency is about 0.70% 70% 1.5% 150%
Show your correct and complete solution in handwritten. Thank yoouuuu!!
An order for a metal fabrication requires production processes from two departments as follows: 1. Laser cutting 2. Folding/bending and welding The laser cutting is costed on a machine hour rate basis and has already been determined to be f£2500 for this order. Determine the total cost of this fabrication given the following information The bending and welding department requires 30 hours of labour costed at £15 per hour The folding/bending and welding department has an annual overhead of £216k to absorb The total annual labour hours for this department are 3600 hours (overheads are absorbed on this basis) The direct cost of materials for this fabrication is £800. What is the total production cost of this order? O£4750 O£5100 O ES550 £3050 £219.759 Previous Page Page 17 of 20 Next Page 36°C 2020
A CNC milling machine has a purchase price of £120,000 and it is considered from an accounting standpoint to be depreciated to zero value over a period of 5 years. If the machine is to be used for 2 shifts with each shift working for 37 hours/ week and 45 weeks/ year. What is the machine cost/ hr which must be charged in order to amortise/repay the costs over the 5 year period? To make the calculation simpler, you can assume that over the 5 year period you will be required to pay back 8% interest on the sum borrowed. Express your answer in § / hour rounded up to the nearest penny
I need accurate answer
This solution is incomplete. What about the answers to the following: d) Diameter of wheel in metres.e) Rotative speed in rpm if peripheral speed is 0.45√2gh.f) Specific speed of turbine in rpm.