Conceptual basis of thermo-controllability in railway braking tribo pairs
/ 0
- Details
- Category: Geotechnical and mining mechanical engineering, machine building
- Last Updated on 07 May 2019
- Published on 24 April 2019
- Hits: 3116
Authors:
M. I. Gorbunov, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-8556-3392, Volodymyr Dahl East Ukrainian National University, Severodonetsk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; prosvirova@ ukr.net
O. V. Fomin, Dr. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0003-2387-9946, State University of Infrastructure and Technology, Kyiv, Ukraine, 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.
O. V. Prosvirova, Cand. Sc. (Tech.), orcid.org/0000-0002-7034-8622, Volodymyr Dahl East Ukrainian National University, Severodonetsk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; prosvirova@ ukr.net
P. M. Prokopenko, orcid.org/0000-0002-1631-6590, State University of Infrastructure and Technology, Kyiv, Ukraine, 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.
Abstract:
Nowadays, the problem of insufficient braking power is solved by increasing the number of friction pairs, resulting in an increase in resource and labor intensity, unsprung mass, resistance to movement, and low resource efficiency. Also acute is the problem of reducing the noise level when using friction brakes. The analysis of the problems of existing brake equipment led to the choice of a promising direction of research on the effectiveness of braking ‒ control of the temperature of the brake friction surfaces.
Purpose. To create a method for increasing the efficiency of the braking system by controlling the cooling of the friction surfaces by adaptive air supply; to create a mathematical model of air pressure supply to the brake frictional contact in order to obtain the optimal diameter of friction lining holes and the air feed rate.
Methodology. During the research, the analysis of leading modern studies and patents of technical solutions aimed at improving the frictional properties of brake devices, methods of decision-making theory and expert evaluation of methods for improving the operational characteristics of railway braking systems is conducted. Mathematical modeling of air pressure supply to the zone of relevant frictional contact is applied.
Findings. A concept of adaptive energy consumption management at self-ventilation of a brake disc plate using the improved mathematical model which considers geometric parameters of air courses. A method for assessing the influence of the factors on brake equipment operation while supplying the compressed air to the frictional contact is suggested.
Originality. The mathematical model of air pressure supply to brake frictional contact is developed in order to obtain the optimal diameter of the friction lining holes. Application of the suggested technique for cooling will allow advancing efficiency of operation of frictional braking elements of rolling stock, increasing the adhesive coefficient, stabilizing the temperature in the tribo-contact, decreasing the wear of brake surfaces of friction and increasing safety of operation.
Practical value. As a result of the conducted research complex, the method of adaptive forced cooling of the friction surfaces of the brake was proposed and scientifically substantiated for the first time, which will provide effective characteristics of the cooling process, will allow reducing significantly the dependence of the coefficient of friction on the temperature in the contact zone of the working elements during braking. The application of the proposed developments will allow:
- using the compressed air, which is drawn from the brake cylinders, effectively;
- cooling the contact area of “brake pad ‒ wheel”, “brake pad ‒ disk”, by supplying compressed cooled air into the holes of the brake pad or formation in the contact zone of the active gaseous medium;
- increasing braking efficiency and reducing the intensity of wear of the brake pads due to the timely removal of friction wear from the contact area;
- increasing the rail traffic safety by enhancing the reliability of braking.
References.
1. Panchenko, S. V., Butko, T. V., Prokhorchenko, A. V. and Parkhomenko, L. O., 2016. Formation of an automated traffic capacity calculation system of rail networks for freight flows of mining and smelting enterprises. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2, pp. 93–99.
2. Gerlici, J., Gorgunov, M., Kravchenko, K., Domin, R., Kovtanets, M. and Lack, T., 2017. Slipping and skidding occurrence probability decreasing by means of the friction controlling in the wheel-braking pad and wheel-rail contacts. Manufacturing Technology, 17(2), pp. 179‒186.
3. Yevtushenko, A. A. and Grzes, P., 2015. 3D FE model of frictional heating and wear with a mutual influence of the sliding velocity and temperature in a disc brake. International Communications in Heat and Mass Transfer, pp. 1–8.
4. Ghadimi, B., Kowsary, F. and Khorami, M., 2013. Thermal analysis of locomotive wheel-mounted brake disc. Applied Thermal Engineering, 51, pp. 948–952.
5. Gerlici, J., Gorgunov, M., Kravchenko, K., Kostyukevich, A., Nozhenko, O. and Lack, T., 2016. Experimental Rigs for Wheel/Rail Contact Research. Manufacturing Technology, 16(5), pp. 909‒916.
6. Tartakovskyi, E., Gorobchenko, O. and Antonovych, A., 2016. Improving the process of driving a locomotive through the use of decision support systems. Eastern-European Journal of Enterprise Technologies, 5(3(83)), pp. 4–11.
7. Myamlin, S., Lingaitis, L. P., Dailydka, S., Vaičiūnas, G., Bogdevičius, M. and Bureika, G., 2015. Determination of the dynamic characteristics of freight wagons with various bogie. Transport, 30(1), pp. 88–92. DOI: 10.3846/16484142.2015.1020565.
8. Lovskaya, A. and Ryibin, A., 2016. The study of dynamic load on a wagon-platform at a shunting collision. Eastern-European Journal of Enterprise Technologies, 3(7(81)), pp. 4–8. DOI: 10.15587/1729-4061.2016.72054.
9. Kelrykh, М. and Fomin, O., 2014. Perspective directions of planning carrying systems of gondolas. Metallurgical and Mining Industry, 6, pp. 64‒67.
10. Fomin, O., 2015. Improvement of upper bundling of side wall of gondola cars of 12-9745 model. Metallurgical and Mining Industry, 1, pp. 45‒48.
11. Hauser, V., Nozhenko, O. S., Kravchenko, K. O., Loulová, M., Gerlici, J. and Lack, T., 2017. Proposolof a Mechanism for Setting Bogie Wheelsets to Radisl Position while Riding Along Track Curve. Manufacturing Technology, 17(2), pp. 186‒192.
12. Adamowicz, A. and Grzes, P., 2011. Analysis of disc brake temperature distribution during single braking under non-axisymmetric load. Applied Thermal Engineering, 31, pp. 1003–1012. DOI: 10.1016/j.applthermaleng.2010.12.016.
Older news items:
- Innovative designs of pumping deep-water hydrolifts based on progressive multiphase non-equilibrium models - 24/04/2019 16:46
- The choice of the strategy of technical operation of modernized shunting locomotives - 24/04/2019 16:44
- Improving the efficiency of using dump trucks under conditions of career at open mining works - 24/04/2019 16:42
