Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
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Chapter 12, Problem 9P
A full journal bearing is 28 mm long. The shaft journal has a diameter of 56 mm with a unilateral tolerance of −0.012 mm. The bushing bore has a diameter of 56.05 mm with a unilateral tolerance of 0.012 mm. The load is 2.4 kN and the journal speed is 900 rev/min. For the minimum clearance assembly find the minimum oil-film thickness, the power loss, and the side flow if the operating temperature is 65°C and SAE 40 lubricating oil is used.
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Q 2. A journal bearing has a shaft diameter of 75.00 mm with a unilateral tolerance of −0.02 mm. The bushing bore has a diameter of 75.10 mm with a unilateral tolerance of
0.06 mm. The bushing is 36 mm long and supports a load of 2 kN. The journal speed is 700 rev/min. For the minimum clearance assembly find the minimum film thickness, the heat loss rate, and the maximum lubricant pressure for SAE 30, SAE 40 and SAE 50 lubricants operating at an average film temperature of 60 °C.
A journal bearing has a shaft diameter of 75.00 mm with a unilateral tolerance of -0.02 mm. The
bushing bore has a diameter of 75.10 mm with a unilateral tolerance of 0.06 mm. The bushing is
36 mm long and supports a load of 2 kN. The journal speed is 720 rev/min.
For the minimum clearance assembly find the minimum film thickness, the heat loss rate, and the
maximum lubricant pressure for SAE 20 and SAE 40 lubricants operating at an average film
temperature of 60°C.
A full journal bearing has a journal diameter of 25 mm, with a unilateral tolerance of -0.03 mm. The bushing bore has a diameter of 25.03 mm and a unilateral tolerance of 0.04 mm. The 1/d ratio is 1/2. The load is 1.2 kN and the journal runs at 1100 rev/min. If the average viscos- ity is 55 mPa • s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Chapter 12 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 12 - A full journal bearing has a journal diameter of...Ch. 12 - A full journal bearing has a journal diameter of...Ch. 12 - A journal bearing has a journal diameter of 3.000...Ch. 12 - Prob. 4PCh. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - A full journal bearing is 28 mm long. The shaft...Ch. 12 - A 114114 in sleeve bearing supports a load of 700...
Ch. 12 - A full journal bearing has a shaft diameter of...Ch. 12 - Prob. 12PCh. 12 - Prob. 13PCh. 12 - A natural-circulation pillow-block bearing with...Ch. 12 - An eight-cylinder diesel engine has a front main...Ch. 12 - A pressure-fed bearing has a journal diameter of...Ch. 12 - Design a central annular-groove pressure-fed...Ch. 12 - Repeat design problem Prob. 1218 using the nominal...Ch. 12 - Table 12-1 gives the Seireg and Dandage curve fit...Ch. 12 - For Prob. 1218 a satisfactory design is...Ch. 12 - An Oiles SP 500 alloy brass bushing is 0.75 in...Ch. 12 - Prob. 23P
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- QUESTION 2 A pressure-fed bearing has a joumal diameter of 55.00 mm with a umilateral tolerance of -0.05 mm. The bushing bore diameter is 50.084 mm with a unilateral tolerance of 0.10 mm. The length of the bushmg is 55 mm. Its central annular groove is 5 mm wide and is fed by SAE 30 oil is 55°C at 200 kPa supply gauge pressure. The journal speed is 2880 rev/min carrying a load of 10 EN. The sump ca dissipate 300 watts per bearing if necessary. For minimum radial clearances, find the minimum film thickness and average temperature. Given the film temperature is 85° c Attach File Browse My Computer QUE STION 3arrow_forwardCompute for the Break Mean Effective Pressure with the following information: Given: Bhp = 1000 Stroke = 5 inches Bore = 5.5 inches Rpm = 2700 Number of cylinders = 8 *Show complete solution. Thank you.arrow_forwardClear writing please!!arrow_forward
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- I want right solution plz solve if you know 100% flange coupling connects two 50 mm diameter lengths of commercial shafting. The coupling flanges are bolted together with four bolts of the same material as the shaft. The bolts are set in clearance holes. The diameter of the bolt circle is 240 mm and the flange thickness is 22 mm, Determine the minimum bolt diameter required to transmit the same torque that the shaft can transmit. What power may be transmitted at 200 rev/ min under steady load conditions?arrow_forwardA full journal bearing has a shaft diameter of 80.00 mm with a unilateral tolerance of -0.01 mm. The /d ratio is unity. The bushing has a bore diameter of 80.08 mm with a unilateral tolerance of 0.03 mm. The SAE 30 oil supply is in an axial-groove sump with a steady-state temperature of 60°C. The radial load is 3000 N. Estimate the average film temperature, the minimum film thickness, the heat loss rate, and the lubricant side-flow rate for the minimum clearance assembly, if the journal speed is 8 rev/s.arrow_forwardA lightly loaded full journal bearing has journal diameter of 25 mm, bush bore of 25.05 mm and bush length of 10 mm. If rotational speed of journal is 1000rpm and average viscosity of liquid lubricant is 0.01 Pa s, Determine power loss?arrow_forward
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