Influence of lubrication sources location on hydromechanical characteristics of heavy-loaded bearings in thermal engines

Authors

  • K. V. Gavrilov South Ural State University, Chelyabinsk
  • M. A. Izzatulloev South Ural State University, Chelyabinsk
  • P. S. Gritsenko South Ural State University, Chelyabinsk
  • I. R. Tsveshko South Ural State University, Chelyabinsk

Keywords:

Elrod equation, lubrication sources, hydromechanical characteristics

Abstract

The paper considers the technique for determining the movable (holes in the crank bearing) and fixed (grooves on the surface of the pad) lubricant sources for lubricant supply to the heavy-loaded friction type bearing. To calculate the field of hydrodynamic pressures in the bearing lubrication layer, two modifications are taken into consideration: the modification of the algorithm for integrating the modified Elrod equation for the degree of the gap feeling. Further studies showed that developed modifications proved to be quite effective in calculating the characteristics of the lubricating layer both statically and dynamically loaded bearings. However, for
the first modification, numerical oscillations of the unknown function at the boundary of the reduction of the lubricating layer were noted, especially for high values of relative eccentricity which is typical for crankshaft bearings of internal combustion engines (ICE). The second modification, for which the finite difference algorithm was used, is characterized by the significant simplicity of numerical implementation and the stability of the iterative procedure. The proposed techniques were used in computational analysis of heavy-loaded tribocontact, which include
the connecting rod bearings of the crankshaft. For the KamAZ and DM-21 engines, we considered the influence of the location of lubricant sources on the hydromechanical characteristics (HMC) of heavy-loaded plain bearings. For the KamAZ diesel engine, parametric studies have been carried out, which consisted in determining the most rational location of the lubricant hole in the crank pin. In this case, all the main HMC of the tribocontact were calculated and, based on their analysis, the most optimal solutions were proposed. For the diesel engine DM-21, the authors proposed original schemes of location of partial and complete oil grooves for distribution and for lubricant supply for connecting rod bearings. An additional method of improving hydromechanical characteristics is proved to be the selection of engine oil with improved viscosity-temperature characteristics, which makes it possible to improve the basic hydromechanical characteristics within 10–20%.

Author Biographies

K. V. Gavrilov, South Ural State University, Chelyabinsk

кандидат технических наук, доцент кафедры «Автомобильный транспорт»

M. A. Izzatulloev, South Ural State University, Chelyabinsk

аспирант кафедры «Автомобильный транспорт»

P. S. Gritsenko, South Ural State University, Chelyabinsk

аспирант кафедры «Автомобильный транспорт»

I. R. Tsveshko, South Ural State University, Chelyabinsk

студент

References

Прокопьев В.Н., Рудич И.Г., Маркелов Е.В. К оптимизации подачи смазки в шатунные подшипники двигателей ДМ-21. Сб. науч. тр. ЧПИ, 1976. № 179. С. 55–67. [Procopyev V.N., Rudich I.G., Markelov E.V. [On the Optimization of the Lubrication Feed to the DM-21 Engine Rod Bearings]. Research Papers CPU. Chelyabinsk, 1976, no. 179, pp. 55–67. (in Russ.)]

Прокопьев В.Н., Гаврилов К.В. Оптимизация параметров сложнонагруженных подшипников скольжения. Проблемы машиностроения и надежности машин. М.: Наука. 2007. № 5. С. 79–86. [Procopyev V.N., Gavrilov K.V. [Optimization of Parameters of Heavy-Loaded Plain Bearings]. Problems of Mechanical Engineering and Machine Reliability, 2007, no. 5, pp. 79–86. (in Russ.)]

Lavie T., Fransisco A., Fatu A., Villechaise B. Multiobjective Optimization of Conrod Big-End Bearing Lubrication Using an Evolutionary Algorithm. Tribology Transaction, 2015, vol. 58, pp. 490–499. DOI: 10.1080/10402004.2014.939795

Vencl A., Rac A. Diesel Engine Crankshaft Journal Bearings Failures: Case Study. Engineering Failure Analysis, 2014, vol. 44, pp. 217–228. DOI: 10.1016/j.engfailanal.2014.05.014

Adatept H., Bykloglu A., Sofuogly H. An Investigation of Tribological Behaviors of Dynamically Loaded Non-Grooved and Micro-Grooved Journal Bearings. Tribology International, 2013,

vol. 58, pp. 12–19. DOI: 10.1016/j.triboint.2012.09.009

Rastogi A., Gupta R.K. Accounting for Lubricant Shear Thinning in the Design of Short Journal Bearings. Journal of Rheology, 1991, vol. 35, pp. 589–603. DOI: 10.1122/1.550182

Reis V.L., Daniel G.B., Cavalca K.L. Dynamic Analysis of a Lubricated Planar Slider–Crankmechanism Considering Friction and Hertz Contact Effects. Mechanism and Machine Theory, 2014, vol. 74, pp. 257–273. DOI: 10.1016/j.mechmachtheory.2013.11.009

Amor M.B., Belghith S., Mezlini S. Finite Element Modeling of RMS Roughness Effect on

the Contact Stiffness of Rough Surfaces. Tribology in Industry, 2016, vol. 38, no. 3, pp. 392–401.

Novotny P. Mixed Lubrication Solution of Dynamically Loaded Radial Slide Bearings. Tribology in Industry, 2017, vol. 39, no. 1, pp. 82–89. DOI: 10.24874/ti.2017.39.01.09

Guy B. From a Compressible Fluid Model to New Mass Conserving Cavitation Algorithms. Tribology International, 2014, vol. 71, pp. 38–49. DOI: 10.1016/j.triboint.2013.10.014

Lengiewicz J., Wichrowski M., Stupkiewicz S. Mixed Formulation and Finite Element Treatment of the Mass-Conversing Cavitation Model. Tribology International, 2014, vol. 72, pp. 143–155. DOI: 10.1016/j.triboint.2013.12.012

Paranjpe R.S. Analysis of Non-Newtonian Effects in Dynamically Loaded Finit Journal Bearings Including Mass Conserving Cavitation. ASME Journal of Tribology, 1992, vol. 114, pp. 736–744. DOI: 10.1115/1.2920943

Sharma N., Kango S., Tayal A., Sharma R.J. Sunil Investigations on the Influence of Surface Texturing on a Couple Stress Fluid Based Journal Bearing by Using JFO Boundary Conditions. Tribology Transaction, 2015, vol. 59 (3), pp. 570–584. DOI: 10.1080/10402004.2015.1094840

Elrod H.G., Adams M.L. A Computer Program for Cavitation and Starvation Problems. Leeds-Lyon Conference on Cavitation, 1974.

Элрод. Алгоритм расчёта зоны кавитации ТАОИМ. М.: Мир / Серия Ф. Проблемы трения и смазки. 1981. № 3. С. 28–32. [Elrod, H.G. [Cavitation Zone Calculation Algorithms]. TAOIM, Мoscow: Mir F. Series Friction and Lubrication Problems. 1981, no. 3, pp. 28–32. (in Russ.)]

Javorova J., Mazdrakova A., Andonov I., Radulescu A. Analysis of HD Journal Bearings Considering Elastic Deformation and Non Newtonian Rabinowitsch Fluid Model. Tribology in Industry, 2016, vol. 38, no. 2, pp. 186–196.

Koukoulopoulos E., Papadopoulos C.I. Piston Ring Performance in Two-Stroke Marine Diesel Engines: Effect of Hydrophobicity and Artificial Surface Texturing on Power Efficiency. Journal of Engineering Tribology, 2018, vol. 232, iss. 8, pp. 940–963. DOI: 10.1177/1350650117736638

Gropper D., Wang L., Harvey T.J. Hydrodynamic Lubrication of Textured Surfaces: a Review of Modeling Techniques and Key Findings. Tribology International, 2016, vol. 94, pp. 509–529. DOI: 10.1016/j.triboint.2015.10.009

Rao T.V.V.L.N., Rani A.M.A., Nagarajan T., Hashim F.M. Analysis of Micropolar and Power Law Fluid–Lubricated Slider and Journal Bearing with Partial Slip–Partial Slip Texture Configuration. Tribology Transaction, 2016, vol. 59 (5), pp. 896–910. DOI: 10.1080/10402004.2015.1121310

Dadouche A., Conlon M.J. Operational Performance of Textures Journal Bearings Lubricated with a Contaminated Fluid. Tribology International, 2016, vol. 93, pp. 377–389. DOI: 10.1016/j.triboint.2015.09.022

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Published

2019-10-09

Issue

Vol. 19 No. 3 (2019)

Section

Calculation and design