PHOTOMECHANICAL IVESTIGATION OF STRESSES ON THE CONTOUR OF CRANKPIN OIL HOLE IN A CRANKSHAFT OF INTERNAL COMBUSTION ENGINE

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Abstract


Crankshafts fail from fatigue in locations of the greatest stress concentration. Such areas are the openings of lubricant holes on crankpin and main journals of the shaft and the fillets between webs and journals. Factors of safety in these locations are minimal. When analyzing crankshafts, the main journals are analyzed for torsion only and the crankpins - for both bending and torsion. The influence of fillet size on bending stress distribution in the plane of the cranks was investigated in the first stage of studies [2; 3] and the distribution of torsional stresses of the crankpin was further studied in [4-6]. This paper presents an original methodology for determining the intensity of stresses in oil hole openings caused by torsion and bending loads on crankshaft journals that arise in the working cycle of internal combustion engine by physical modeling with optical transparent flat models according to the method of photomechanics. The necessary rigging equipment for the experiments of bending and torsional loading of crankshaft models was designed and manufactured. The performed analysis made it possible to establish the qualitative and quantitative factors that affect the stresses on the contour of oil hole opening from bending and torsion induced deformations of the crankpin.


About the authors

O V Zhed

Peoples’ Friendship University of Russia (RUDN University)

Author for correspondence.
Email: zhed_ov@pfur.ru
Miklukho-Maklaya str., 6, Moscow, Russia, 117198

Olga Viktorovna Zhed, Candidate of Technical Sciences, Associate Professor at Department of Mechanical and Tool Engineering, Academy of Engineering, Peoples’ Friendship University of Russia. Research interests: photomechanics in mechanical engineering, cutting tools.

V V Kopylov

Peoples’ Friendship University of Russia (RUDN University)

Email: kopylov_vv@rudn.university
Miklukho-Maklaya str., 6, Moscow, Russia, 117198

Vladimir Viktorovich Kopylov, Candidate of Technical Sciences, Associate Professor at Department of Mechanical and Tool Engineering, Academy of Engineering, Peoples’ Friendship University of Russia. Research interests: nanotechnology, photomechanics in mechanical engineering, cutting tools.

A S Koshelenko

Peoples’ Friendship University of Russia (RUDN University)

Email: kafedra.tm.rudn@mail.ru
Miklukho-Maklaya str., 6, Moscow, Russia, 117198

Adolf Semenovich Koshelenko, Candidate of Technical Sciences, Associate Professor at Department of Mechanical and Tool Engineering, Academy of Engineering, Peoples’ Friendship University of Russia. Research interests: photomechanics in mechanical engineering, technological quality control.

References

  1. Koshelenko A.S., Poznyak G.G. Teoreticheskie osnovy i praktika fotomehaniki v mashinostroenii [Theoretical foundations and practical applications of photomechanics in mechanical engineering]. Moscow: Izd-vo Granitsa, 2004. 296 p. (in Russ.).
  2. Koshelenko A.S., Babenkov I.S., Zhed O.V. Issledovanie naprjazhennogo sostojanija kolenchatogo vala dvigatelja metodom fotomehaniki [Investigation of the stress-strain state of engine crankshaft by photomechanical method]. Truck. M.: Izd-vo «Innovative machine building», 2000. No. 12. P. 21—24. (in Russ.).
  3. Koshelenko A.S., Zhed O.V. Photo-elastic model of crankshaft. RUDN Journal of Engineering Researches. 2003. No. 1. P. 69—73. (in Russ.).
  4. Rogov V.A., Koshelenko A.S., Zhed O.V. Issledovanie na opticheskih ploskih modeljah kolenchatogo vala naprjazhenij ot izgiba i kruchenija v ego raschetnyh tochkah [Investigation of stresses from bending and torsion on optical flat models of the crankshaft at its reference points]. Proceedings of the International Scientific and Technical Conference “Problems and Achievements in Innovative Materials and Technologies of Mechanical Engineering”. Komsomolsk-on-Amur, May 12—16, 2015. P. 315—319. (in Russ.).
  5. Rogov V.A., Koshelenko A.S., Zhed O.V. Research by photomechanics method the intensity of contour tension in the oil passage hole of crankshafts journals caused by the working load of the internal combustion engine // Truck. M.: Izd-vo «Innovative machine building», 2015. № 11. P. 15—19. (in Russ.).
  6. Rogov V.A., Koshelenko A.S., Zhed O.V. Issledovanie na opticheskih ploskih modeljah kolenchatogo vala naprjazhenij ot izgiba i kruchenija v ego raschetnyh tochkah [Investigation of stresses from bending and torsion on optical flat models of the crankshaft at its reference points]. Technology of Mechanical Engineering. Moscow: Izd. center «Manufacturing Technologies», 2016. No. 10. P. 52—57.

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Copyright (c) 2017 Zhed O.V., Kopylov V.V., Koshelenko A.S.

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