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
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 12, Problem 17P
A pressure-fed bearing has a journal diameter of 50.00 mm with a unilateral 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 bushing 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 kN. The sump can dissipate 300 watts per bearing if necessary. For minimum radial clearances, perform a design assessment using Trumpler’s criteria.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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.
It has a full-slide type bearing rotating at a speed of 1975 rpm.A load of 5693 N is applied. SAE 40 oil in bearing at 60C inlet temperatureplanned to be used.Shaft and bushing diameters in bearing with tolerance data 41−0.010 respectively+0.000mmand 41.125−0.000+0.100 mm.Average radial clearance mounting for this bearing with bush length 20.50 mmCalculate the following;a) Bearing characteristic number,b) Minimum lubricant film thickness,c) Eccentricity value,d) coefficient of friction,e) Average oil film temperature andf) Find the Tmax temperature value.
A lightly loaded full journal bearing has journal diameter of 50 mm, bush bore of 50.05 mm and bush length of 20 mm. If rotational speed of journal is 1200 rpm and average viscosity of liquid lubricant is 0.03 Pa s, the power loss (in W) will be
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
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- A natural feed journal bearing of diameter 50mm and length 50mm operating at 20rev/s. Carries a load of 2KN. The lubricant used has a viscosity of 20MPa. The radial clearance is 50um. The Sommerfeld number for the bearing?arrow_forwardFLUID MACHINERY A duplex, single-acting reciprocating power pump is driven by a 40-HP electric motor at a speed of 120 RPM and delivers water at a temperature of 150oF. The pump operates against a heat of 150 psig. The overall efficiency is 75%. If the estimated slip is 8%, determine the required bore and stroke for a bore – stroke ratio of 0.75. a. bore Answer : __________________ in.b. stroke Answer : __________________ in.arrow_forwardA conical Clutch transmits rotation from one rotating shaft to another though frictional forces on the conical face. The following data is for a conical clutchInside Diameter 25.0 mmOutside Diameter 100 mmCoefficient of Friction 0.33Axial Force 1000NIncluded angle 100 degreeRotational speed 1500rev/minuteCalculate the Torque and Power that can be transmitted without slipping using both Uniform Pressure Theory and Uniform Wear Theoryarrow_forward
- 2. A centrifugal pump installation has been designed to discharge 0.126 m^3/s of brine (sp.gr. = 1.2). The suction pipe is 305 mm and is at the same level as the discharge pipe which is 203 mm in diameter. At the centerline of suction flange, the vacuum is 154.2 mm Hg. The discharge pressure gauge reads 0.1379 MPa and is connected 1.22 m above the discharge flange centerline. The pump is driven by a 35 KW electric motor that will not carry overload and has an efficiency of 82%. There is no significant head loss. The design conditions have changed, and is now desired to increase the capacity of the pump by increasing the speed. The motor is so designed that its speed maybe increased but its power cannot exceed its design rating. Assuming the pump efficiency to remain constant, how much can the pump capacity be increased without overloading the motor?arrow_forwardA 360° journal bearing is 3 in. long and carries a 4 in. diameter shaft with a radial clearance of 0.0025 in. The shaft supports a radial load of 1000 lbs. and a speed of 500 rpm. The operating temperature for the bearing is 140°F and SAE-20 oil is used for bearing lubrication. For these conditions, evaluate the following by Petroff’s equation: 1. Friction coefficient for the bearing. 2. Heat energy lost due to friction in the bearing, in horsepower.arrow_forwardA radial plain bearing has a diameter of 60 mm and a width of 60 mm. Journal rotation speed 600rpm; radial load acting on the bearing is 3.5 kN, the inlet temperature of the SAE 20 oil used is 30 C andSince r / c = 1000;a-) The increase in the temperature of the oil and its average temperature,b-) Minimum oil film thickness, angular position and eccentricity ratio,c-) Loss of power in the bed,d-) Side leaks and total oil flow,e-) Max. oil film pressure.arrow_forward
- A multiple disc clutch, steel on bronze, is to transmit 7 kW at 1000 rpm. The inner radius of the contact is 50 mm and outer radius of the contact is 75 mm. The clutch operates in oil with an expected coefficient of 0.1. The average allowable pressure is 0.35 N/mm2. Determine the total number of steel and bronze discs.arrow_forward15.)A full journal bearing has a journal diameter of 4.000in. with a unilateral tolerance of -0.004in. The bushing bore has a diameter of 4.004in and unilateral tolerance of +0.004in. the bearing is 3in long. The journal load is 3000 lbf and it runs at a speed of 400 rpm. What is the load per projected bearing area 9P) in psi? Choose answer below 75 100 125 250 16.)For the bearing in problem #15, if the lubricant average viscosity is 9 ureym, what is the Sommerfield number (assuming minimum clearance) Choose answer below Between 0.6 and 0.7 Between 0.5 and 0.6 Between 0.3 and 0.4 Between 0.2 and 0.3arrow_forwardA pipe (f = 0.015) has a diameter of 250-mm and 150 m of length is connected in series with another pipe (f = 0.02) having a diameter of 200 mm and 200 m of length. Calculate the diameter of an equivalent single pipe of length 350 m and friction factor of 0.025arrow_forward
- An equation for determining the friction factor developed by Colebrook is 1/√f =-0.869 ln((ɛ/D)/3.7+2.523/(Re. √f)). Check the location of line ɛ/D=0.0002 on the Moody diagram with the equation above for a Reynolds number, Re is 10⁵.arrow_forwardA duplex, single-acting reciprocating power pump is driven by a 40-HP electric motor at a speed of 120 RPM and delivers water at a temperature of 150F. The pump operates against a heat of 150 psig. The overall efficiency is 75%. If the estimated slip is 8%, determine the required bore and stroke, for a bore-stroke ratio of 0.75. a. bore in inches b. stroke in inchesarrow_forwardA certain six-cylinder engine has a 130.2 mm bore, a 127 mm stroke, and a clearance volume of 0.119 L in each cylinder. Does the engine run on diesel or gasoline fuel? Explain your answerarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
BEARINGS BASICS and Bearing Life for Mechanical Design in 10 Minutes!; Author: Less Boring Lectures;https://www.youtube.com/watch?v=aU4CVZo3wgk;License: Standard Youtube License