THERMAL OPERATION REGIME OF MULTIDISC OIL-COOLED BRAKE

Sergienko V.P., Candidate of Technical Sciences; V.A. Belyi Metal-Polymer Research Institute of NAS of Belarus, Gomel, the Republic of Belarus, E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Tseluev M.Yu., V.A. Belyi Metal-Polymer Research Institute of NAS of Belarus, Gomel, the Republic of Belarus

Kupreev A.V., V.A. Belyi Metal-Polymer Research Institute of NAS of Belarus, Gomel, the Republic of Belarus

Antonyuk V.E., Doctor of Technical Sciences; Joint Institute of Mechanical Engineering of the NAS of Belarus; Minsk, the Republic of Belarus

Zabolotsky M.M., Belaruski autamabilny zavod; Zhodzina, the Republic of Belarus

Rudyi V.V., Belaruski autamabilny zavod; Zhodzina, the Republic of Belarus

The thermal operation regime of a multidisc oil-cooled brake of a dump truck has been analyzed at its motion in a slow-down mode along a continuous downgrade. The initial boundary value problem for the considered operation regime of the brake has been formulated and solved by the finite-element method. The formation regularities of a nonstationary temperature field in the brake disc pack have been determined. A dependence was obtained between the maximal temperature on the friction surface of a most heat-loaded friction pair versus dump truck speed and coolant consumption.

Operation regime, multidisc oil-cooled brake, brake disc

• Chichinadze A.V. [et al.]. Informaciologicheskie aspekty teplovoj dinamiki i modelirovanija trenija i iznashivanija frikcionnyh par pri ocenke rabochih harakteristik nagruzhennyh tormoznyh ustrojstv na stadii proektirovanija [Informative aspects of thermal dynamics and modeling of friction and wear of friction pairs in the evaluation of the performance of the loaded braking devices at the design stage]. Trenie i iznos [Friction and wear], 2000, vol. 21, no. 4, pp. 393-400.
• Flidlider G.M. O termicheskih naprjazhenijah i ustojchivosti «tonkih» frikcionnyh diskov v rezhimah nestacionarnogo trenija [About thermal stresses and stability of "thin" friction discs in non-stationary modes of friction]. Trenie i iznos [Friction and wear], 1981, vol. 2, no. 6, pp. 1050-1060.
• Mariev P.L. [et al.]. Karernyj avtotransport: sostojanie i perspektivy [Career vehicles: state and prospects]. St.Petersburg, Nauka Publ., 2004. 429 p.
• Matveevskiy R.M. [et al.]. K voprosu o mehanizme razrushenija smazochnogo sloja na frikcionnom kontakte [On the mechanism of the destruction of the lubricating layer on the frictional contact]. Trenie i iznos [Friction and wear], 1980, vol. 1, no. 3, pp. 548-553.
• Balakin V.A., Sergienko V.P. Teplovye raschety tormozov i uzlov trenija [Thermal calculations of brakes and friction units]. Gomel, IMMS NANB Publ., 1999. 220 p.
• Polyakov N.V., Chichinadze A.V. Teplovoj rezhim tormozov, rabotajushhih v masle. Materialy v tribotehnike nestacionarnyh processov [Heat mode brake running in oil. Materials in non-stationary processes tribotechnology]. Moscow, Nauka Publ., 1986. pp. 210-221.
• Lebedev P.A., Belyaev A.N. Opredelenie temperaturnogo polja mnogodiskovoj frikcionnoj mufty [Determination of the temperature field of multi-plate clutch]. Trenie i iznos [Friction and wear], 1984, vol. 5, no. 4, pp. 597-604.
• Balakin V.A. [et al.]. Teplovoj raschet mnogodiskovogo masloohlazhdaemogo tormoza [Thermal design of multi-disc oil cooled brakes]. Trenie i iznos [Friction and wear], 2004, vol. 25, no. 6, pp. 585-592.
• Balakin V.A. [et al.]. Teplovoj rezhim raboty tormozov kar'ernyh samosvalov BelAZ v uslovijah ih jekstrennogo tormozhenija [The thermal operation of dump trucks BelAZ brakes under conditions of emergency braking]. Trenieiiznos [Friction and wear], 2001, vol. 22, no. 5, pp. 520-526.
• Masatoshi M. [et al.] Numerical Simulation of Temperature and Torque Curve of Multidisk Wet Clutch with Radial and Circumferential Grooves. Tribology Online, 2009, vol. 4, no. 1, pp. 17-21.
• Carslaw H.S., Jaeger J.C. Conduction of Heat in Solids. London, Oxford University Press Publ., 1959. 510 p.
• Bathe K-J. Finite Element Procedures. New Jersey, Prentice-Hall Inc Publ., 1996. 1037 p.
• Popov V.I. Teploobmen v zone kontakta razemnyh i nerazemnyh soedinenij [Heat transfer in the contact zone of detachable and permanent joints]. Moscow, Energiya Publ., 1971. 216 p.
• Shlykov Yu.P., Ganin E.A., Tsarevskiy S.N. Kontaktnoe termicheskoe soprotivlenie [Contact thermal resistance]. Moscow, Energiya Publ., 1977. 216 p.
• Wong H.Y. Handbook of Essential Formulae and Data on Heat Transfer for Engineers. London; New York: Longman Publ., 1977. 212 p.
• Brodskiy V.Z. Vvedenie v faktornoe planirovanie jeksperimenta [Introduction to factorial experimental design]. Moscow, Nauka Publ., 1976. 223 p.

VIBROACOUSTIC ACTIVITY OF THE FRICTIONAL PAIR DEPENDING ON THE DYNAMIC CHARACTERISTICS OF THEIR MATERIALS

Sergienko V.P., Candidate of Technical Sciences; V.A. Belyi Metal-Polymer Research Institute of NAS of Belarus, Gomel, the Republic of Belarus, E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Bukharov S.N., V.A. Belyi Metal-Polymer Research Institute of NAS of Belarus, Gomel, the Republic of Belarus

The paper presents investigation results in the effect of structure and composition of frictional materials used in vehicle brake and transmission designs on their dynamic characteristics and vibroacoustic activity of friction joints. The data are reported on the dependence of dynamic characteristics upon the polymer matrix type, fibrous filler orientation and geometry, degree of binder solidification, and the presence of matrix phase plasticizers. It is shown that damping ability depends much on the load and temperature operation parameters, and may vary within a wide range in response to the material composition and structure. Damping ability of frictional materials has been studied in respect to its influence on vibration and noise generation and levels in the friction units. Test results of dry clutch on inertial dynamometer are cited that have supported the possibility of the effective reduction of vibroacoustic activity of the friction units by way of choosing optimal composition and structure of the friction material for friction pairs.

Vehicle brake, vibroacoustic activity, friction joints, dynamic characteristics, damping ability

• Abendroth H., Tepper H. Worldwide Brake - Friction Material Testing Standards, Challenges, Trends. Proc. of the 7-th International symposium of friction products and materials, Yaroslavl, 2008, pp. 140-150.
• Hoffmann N., Gaul L. Friction Induced Vibrations of Brakes: Research Fields and Activities. SAE paper 2008-01-2579, 2008.
• Sergienko V.P. [et al.]. Issledovanie vlijanija sostava frikcionnyh materialov na vibroakusticheskuju aktivnost frikcionnyh par trenija [Research of influence of the composition of the friction material on the vibro-acoustic activity of friction friction pairs]. Aktual. vopr. tribologii: MNTK [Actual Tribology questions: IRTC], Samara, 2007, pp. 266-278.
• Sergienko V.P., Bukharov S.N., Kupreev A.V. Vibracija i shum v tormoznyh sistemah mobilnyh mashin. Ch. I [Vibration and noise in brake systems of mobile machines. Part I]. Trenie i iznos [Friction and Wear], 2008, vol. 29, no. 3, pp. 306-314.
• Lewis Т. Analysis and Control of Brake Noise. SAE Paper 872240, 1987.
• Ghesquiere H. Brake Squeal Noise Analysis and Prediction. ImechE, 1992. no. 925060.
• Schmalfuss C. Theoretische und experimentelle Untersuchung von Scheibenbremsen. Doctoral thesis, VDI Fortschritt-Bericht Reihe 12. 2002. 494 p.
• Ahmed I. On the Analysis of Drum Brake Squeal Using Finite Element Methods Technique. SAE paper 2006-0-3467, 2006.
• Sergienko V.P., Bukharov S.N., Kupreev A.V. A Study of the Influence of Structure of Composite materials on the Vibration of Frictional pairs. Proceedings of the 10th International Conference on Tribology SERBIATRIB'07, 2007, pp. 85-88.
• Nishiwaki M. [at al.] A Study on Friction Materials for Brake Squeal Reduction by Nanotechnology. SAE 2008-01-2581, 2008.
• Sergienko V.P., Bukharov S.N. Noise and Vibration in Frictional Joints of Machines. Tribologia, 2008, vol. 1, pp.. 81-89.
• Sinou J.J., Jezequel L. Mode coupling instability in friction-induced vibrations and its dependency on system parameters including damping. Europ. J. Mech, 2007, no. 26, pp. 106-122.
• Hoffmann N., Gaul L., Angew Z. The role of damping in mode-coupling type instability. Math. Mech. 83, 2003, pp. 524-534.
• Earles S., Chambers P. Disc brake squeal noise generation: predicting its dependency on system parameters including damping. Int. J. Veh. Design 8, 1987, pp. 538-552.
• Kragelskiy I.V, Gittis N.V. Frikcionnye avtokolebanija [Frictional self-excited vibrations]. Moscow, Nauka Publ., 1987.
• Ostermeyer G.P. On tangential friction induced vibrations in brake systems. SAE Paper 2008-01-2850.
• Nashir A., Dzhouns D., Khenderson D. Dempfirovanie kolebanij [Damping]. Moscow, Mir Publ., 1988.
• U.Wagner [et al.] Brake squeal: Modeling and Experiments. VDI-Tagung Schwingungen in Antrieben 2003. Messung, Simulation, Beeinflussung, and Uberwachung, 2003.
• Ouyang H. [et al.] Numerical analysis of automotive disc brake squeal: a review. Int. J. Vehicle Noise and Vibration, 2005, vol. 1, no. 3/4, pp. 207-231.
• Thompson J., Rhode A., Marks D. Inertia Simulation in Brake Dynamometer Testing. SAE Paper 2002-01-2601.

CALCULATING ASSESSMENT OF RESISTANCE OF WEAR-FATIGUE DAMAGES FOR AN ACTIVE SYSTEM “PISTON RING - CYLINDER LINER”. PART I: THE DIRECT EFFECT

Bogdanovich A.V., Doctor of Technical Sciences; Lida College of educational institution "Grodno State University named after Ya.Kupala"; Lida, THE Republic of Belarus, E-mail:  This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Dependences for calculating assessment of resistance of wear-fatigue damages (mechano-sliding fatigue limit, wear life) for an active system "piston ring - cylinder liner" of explosion engine are suggested (the direct effect). The thickness of cylinder liner for explosion engine on criterion of strength with account of friction process is evaluated.

Resistance, mechano-sliding fatigue limit, wear life, piston ring, friction process

• Grigorev M.A., Ponomarev N.N. Iznos i dolgovechnost avtomobilnyh dvigatelej [Wear and durability of automobile engines]. Moscow, Mashimostroenie Publ., 1976. 248 p.
• Lukinskiy V.S., Zaytsev E.I. Prognozirovanie nadezhnosti avtomobilej [Car Reliability Prediction]. L., Politekhnika Publ., 1991. 224 p.
• GOST 30638-99. Tribofatika. Terminy i opredelenija [State Standard 30638-99 Tribo-fatigue. Terms and Definitions]. Minsk, 1999. 18 p.
• Sosnovskiy L.A. [et al.]. Iznosoustalostnye povrezhdenija i ih prognozirovanie (tribofatika) [Wear Fatigue damages and forecasting (TRIBO-FATIGUE)]. Gomel; Kiev; Moscow; Wuhan, 2001. 170 p.
• Bogdanovich A.V. Prognozirovanie predelnyh sostojanij silovyh system [Prediction of limit states of power systems]. Grodno, GrGU n.Ya. Kolasa Publ., 2008. 371 p.
• Stepanov Yu.A. [et al.]. Konstrukcija i raschet avtotraktornyh dvigatelej: ucheb. dlja studentov vuzov [Design and calculation of automotive engines: a textbook for students]. Moscow, Mashinostroenie Publ., 1964. 552 p.
• Titunin B.A., Starostin N.G., Mushnichenko V.M. Remont avtomobilej KamAZ [Repair KamAZ]. L., Agropromizdat Publ., 1987. 288 p.
• Sosnovskiy L.A. Mehanika iznosoustalostnogo povrezhdenija: monogr [Mechanics wear fatigue damage: a monograph]. Gomel, BelGUT Publ., 2007. 434 p.
• Sosnovskiy L.A. Troschenko V.T. Soprotivlenie ustalosti metallov i splavov [The fatique resistance of metals and alloys]. Kiev, Nauk. Dumka Publ., 1987. Vol 2, 825 p.

KEEPING ENERGY DURING BRAKING OF THE CITY VEHICLES

Blagonravov A.A., Doctor of Technical Sciences, The Institute of Engineering Science, RAS (Ural Branch); Yekaterinburg; Russian Federation; E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Yurcevitch A.V., Candidate of Technical Sciences, The Institute of Engineering Science, RAS (Ural Branch); Yekaterinburg; Russian Federation

We give an assessment of the proportion of the estimated energy lost during braking of the city vehicles moving at regular stops. We suggest a method of saving energy (or greater part of it) with the subsequent recuperation in the next cycle through flywheel and mechanical stepless transmission installed between the flywheel and the vehicle cardan shaft.

Energy lost, braking, city vehicles, regular stops, saving energy, subsequent recuperation

• Grishkevich A.I. Proektirovanie transmissij avtomobilej: cprav [Designing of car transmissions: herald]. Moscow, Mashinostroenie Publ., 1984.
• Blagonravov A.A. Mehanicheskie besstupenchatye peredachi nefrikcionnogo tipa [Non-friction type of mechanical continuously variable transmission]. Moscow, Mashinostroenie Publ., 1977.
• Blagonravov A.A. Mehanicheskie besstupenchatye peredachi [Mechanical continuously variable transmission]. Yekaterinburg, UrO RAN Publ., 2005.
• Blagonravov A.A., Revnyakov E.N. Mehanizmy svobodnogo hoda impul'snyh besstupenchatyh peredach [Freewheel pulse of continuously variable transmission]. Avtomobil. prom-st [Car industry], 2008, no. 6.
• Blagonravov A.A. Mehanicheskaja besstupenchataja peredacha [Mechanical continuously variable transmission]. Patent RF, no. 221197, 2003, no. 25.
• Blagonravov A.A., Revnyakov E.N. Mehanicheskaja besstupenchataja peredacha impul'snogo tipa [Mechanical continuously variable transmission of pulse type]. Avtomobil. prom-st [Car industry], 2007, no. 5.