Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

1 v and timing belt

1,482 views

Published on

This Books is uploaded By Muhammad Ahsan.
My facebook Group Is " Chemical Technology (M.A.S)

Published in: Engineering, Business, Technology
  • You can try to use this service ⇒ www.WritePaper.info ⇐ I have used it several times in college and was absolutely satisfied with the result.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Hi there! I just wanted to share a list of sites that helped me a lot during my studies: .................................................................................................................................... www.EssayWrite.best - Write an essay .................................................................................................................................... www.LitReview.xyz - Summary of books .................................................................................................................................... www.Coursework.best - Online coursework .................................................................................................................................... www.Dissertations.me - proquest dissertations .................................................................................................................................... www.ReMovie.club - Movies reviews .................................................................................................................................... www.WebSlides.vip - Best powerpoint presentations .................................................................................................................................... www.WritePaper.info - Write a research paper .................................................................................................................................... www.EddyHelp.com - Homework help online .................................................................................................................................... www.MyResumeHelp.net - Professional resume writing service .................................................................................................................................. www.HelpWriting.net - Help with writing any papers ......................................................................................................................................... Save so as not to lose
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Thanks for your ideas. Drive Parts Direct aims to provide you with a convenient “one stop shop” for all your Power Transmission component requirements.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here

1 v and timing belt

  1. 1. ME‐205 : Element of machine dynamics and design Dr. Muhammad Wasif Assistant  Professor – I.M.D. Ph.D. (CAD/CAM – Canada), M.Engg. (Mfg. Engg. – NEDUET),  B.E. (Mech. Engg. – NED UET). Member ASME and PEC Room : 1st on LHS of main corridor, ground floor – IM Building Machine dynamics : V‐Belts 1
  2. 2. Dr. Muhammad Wasif Qualifications B.E. ‐ Mech. Engg.   NED UET 2000‐2003 M. Engg. ‐ Mfg. Engg.  NED UET 2005‐2007 Ph.D. (CAD/CAM) CU, Canada 2009‐2013 A New Approach to CNC Programming for Accurate Multi‐axis Face‐ Milling of Hypoid Gears Experiance Hinopak Motors Ltd.  Prod. Exec. 2004‐2005 NED UET (IMD) Lecturer 2006‐2007 NED UET (IMD) Director PDC 2006‐2007 NED UET (IMD) Asst. Prof. 2007‐2013 2ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  3. 3. Belt Drives – Review  • In power transmissions, use of belts, simplify the machine design and reduce the cost. • Is far more economical than buying a motor to run at the speed required by the driven equipment. • Due to flexibility, it can absorb a good amount of shock and vibration. • It can take care of some degree of misalignment between the driven and the driver machines and long distance power transmission. 3ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  4. 4. V‐Belts : Advantages • Transmit greater amount of power with higher velocity ratio. • Usually made of cotton, ryon or nylon impregnated with rubber. • A single V‐belts is less efficient than a flat belt due to the wedging action b/w belt and pulley (high friction), but multiple v‐belts can be used to transmit higher power. • V‐belts are longer in life due to seamless design (no joint). • V‐belts are used for short center distance, i.e. compactness. • V‐belts are manufactured in standard lengths. • The groove angle of a sheave is made somewhat smaller than the belt‐ section angle. This causes the belt to wedge itself into the groove, thus  increasing friction. 4ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  5. 5. V‐Belts : Limitations • V‐belts cannot be used with large center distance. • V‐belt’s pulleys are complicated in design and hence expensive. • Not suitable for constant speed applications due to creep. • Less durable than the flat belts. • Speed limit of v‐belt drives are between 5 to 50m/s due to the design of groove in pulley. 5ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  6. 6. = Table 20.1,20.2 – Page 728, A Textbook of  Machine Design by R.S.KHURMI AND J.K.GUPTA  6ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  7. 7. V‐Belts • Pitch length is defined as the circumferential length of the belt at the pitch width of the belt (width at the neutral axis). • The value of pitch width remains same for any type of the belt. (S.I.) 7
  8. 8. Applications:  1. Motor pumps (suction pumps) 2. Car air conditioner  3. Threshers/Crushing machines 4. Lathe machine spindle 8ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  9. 9. V‐Belts • Non standard pitch length and center distances can be calculated using; • Relation between T1 and T2 is 2.3 /   9ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  10. 10. Example 20.1 – Page 731, A Textbook of Machine Design by R.S.KHURMI AND J.K.GUPTA  10ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  11. 11. Timing Belts • It is made of rubberized fabric coated with a nylon fabric, and has steel wire within to take the tension load. • It has teeth that fit into grooves cut on the periphery of the pulleys • No slip and negligible stretch. • Can be used with wide variety of speed. • Higher efficiency (97‐99%) • Five standard types are available according to the applications. 11ME‐205, Elements of Machine design and dynamics, conducted by Dr. Muhammad Wasif (Asst. Professor ‐ IMD, NEDUET)
  12. 12. Refernces 12 • R.S. Khurmi, G.K. Gupta, 2005, A text book of machine design, New Dehli‐ India,  EURASIA PUBLISHING HOUSE. • R. G. Budynass, J.K. Nisbett, 2005, Shigley’s Mechanical Engineering Deisgn, New  York –USA, McGraw Hill. • R. L. Mott, 2004, Machine Elements in Mechanical Design, USA, Pearson Prentice‐ Hall. • R. L. Norton, 1996, Machine design an integrated approach, NJ USA, Prentice‐Hall. • B. J. Hamrock, B. O. Jacobson, S. R. Schmid, 1999, Fundamental of Machine  Elements, New York –USA, McGraw‐Hill. • U. C. Jinbal, 2010, Machine Design, India, Pearson . • R. O. Parmley, 2005, Machine devices and components, USA, McGraw‐Hill.

×