INFLUENCE OF DIFFERENT SCHEMES OF PULSE THERMAL ACTION ON THE STATE OF FRICTION PADS OF DISC-PAD BRAKES
DOI:
https://doi.org/10.18372/0370-2197.1(94).16473Keywords:
disc-pad brake, friction pairs, one- and two-way pulse heat supply, dynamic coefficient of friction, linear wearAbstract
The materials of the article include the following issues: thermal currents during one- and two-sided friction in disc-pad brakes; energy load of disc-pad brakes and their main operational parameters; discussion of results It is established that the surface-volume temperatures of friction pairs "disk-pad" provide heat distribution in one and two-way supply at high temperature gradients and the difference in energy load is up to 20%. It is shown that the magnitude of the increase in the thickness of the pad lining under one-sided heat exposure depends on the amount and intensity of gaseous pyrolysis products of the binder, did not exceed 0.8% and is much less than the recommended values (not more than 2.5%). Electrothermomechanical friction as a set of physical processes, phenomena and effects in the contact zone of friction pairs of the tribological system is a dissipative process, which is characterized by: heat release, electrification of friction bodies, tribochemical reactions, structural-phase transformations in the surface layers of friction parts. Thermal processes during friction are the main channel of energy dissipation (scattering) and largely determine the nature of the set of physicochemical processes caused by friction in tribosystems and significantly affect the dynamic coefficient of friction, the change of which is considered in mechanical, electrical, thermal and chemical fields. It is advisable to select the materials of friction pairs according to the force of friction, specific loads and contact displacement of their microprojections, as well as energy load, which depend on the physico-mechanical and chemical processes occurring in the contact zone. The estimation of pulsed thermal influence on friction linings and its influence on operational parameters of a disc-pad brake is carried out.
References
Friktsionnoye vzaimodeystviye v elektricheskikh i teplovykh polyakh metallopolimernykh par treniya / A. Kh. Dzhanakhmedov, A. I. Vol'chenko, E. S. Pirverdiyev [i dr.] // Vestnik Azerbaydzhanskoy inzhenernoy akademii. – Baku. – 2014. - №6 (2). – S. 30 – 54.
Friktsionnyye uzly / [A. A. Petrik, N. A. Vol'chenko, P. Yu. Purgal, D. A. Vol'chenko] Monografiya (nauchnoye izdaniye). V 2-kh tomakh Tom. 1. Kubansk. gosudarstv. tekhnologich. un-t (Rossiya). – Krasnodar, 2003. – 220 s.
Friktsionnyye uzly / [A. A. Petrik, N. A. Vol'chenko, P. Yu. Purgal, D. A. Vol'chenko] Monografiya (nauchnoye izdaniye). V 2-kh tomakh Tom. 2. Kubansk. gosudarstv. tekhnologich. un-t (Rossiya). – Krasnodar, 2003. – 220 s.
Chichinadze A. V. Materialy v trbotekhnike nestatsionarnykh protsessov / A. V. Chichinadze, R. M. Matveyevskiy, E. D. Braun – M.: Nauka, 1986. – 248 s.
Chichinadze A. V. Iznosostoykost' friktsionnykh polimernykh materialov / A. V. Chichinadze, V. Ya. Belousov, I. M. Bogatchuk – L'vov: Vishcha shkola, 1989. – 144 s.
Diskovyye i diskovo-kolodochnyye tormoza v mashinostroyenii / A. Kh. Dzhanakhmedov, D. A. Vol'chenko, D. Yu. Zhuravlev [i dr.] / Tom. 2. Baku: Appostroff-A, 2021. – 392 s.
Diskovyye i diskovo-kolodochnyye tormoza v mashinostroyenii / A. Kh. Dzhanakhmedov, D. A. Vol'chenko, M. Ya. Dzhavadov [i dr.] / Tom. 1. Baku: Appostroff-A, 2020. – 376 s.
Gudz G. S., Globchak N. V., Kolyasa A. L., Yavorskiy Ya. P. Teplovoy raschet avtomobil'nykh diskovykh tormozov na tipichnykh rezhimakh ispytaniy. – L'vov: Liga – press, 2007. – 126 s. Na ukr. yaz.
Perspectives of application of Russian carbon friction composite materials in brakes of aviation wheels. ASME, Intern. Congress, Atlanta, USA, November / [Chichinadze A. V., Bakin A. I., Mozalev V. V., Suvorov A. V.]. – Atlanta, USA, 1996. – Vol. 2, part B. – P. 562 – 570.
Krauser R., Kohlgruber K. Temperaturberechnung in Scheibenbremsen / R. Krauser, K. Kohlgruber. – Automobile Industrie, 4/1976. – P. 37 – 48.
Tomskiy K. O. Povysheniye effektivnosti raboty i iznosostoykosti tormoznykh ustroystv putem primeneniya bimetallicheskikh materialov: Avtoref. dis. … kandidata tekhn. nauk / K. O. Tomskiy. – M.: FGBOU VPO «Rossiyskiy gosudarstvennyy universitet nefti i gaza imeni Gubkina», 2013. – 24 s.
Kapralov N. F. Vybor materialov par treniya / N. F. Kapralova // Iz-iya vyssh. uchebn. zaved., Mashinostroyeniye, №12, 1977. – S. 28 – 34.
Kindrachuk M. V., Volchenko D. A., Volchenko N. A. [et al.] Influence of a water conduit on the wear resistance of materials in friction pairs of brake devices // Phiz. – Khim. Mechanics of materials. – 2017. – 53. №2. P. 135 – 141.
