Engineering Technologies and Systems - 01. Senin P. V., Rakov N. V., Makeykin A. M. A theoretical basis for the methods to restore working capacity of valve-actiating gear of the cylinder block head

UDC 62-224.2:62-89

DOI: 10.15507/0236-2910.027.201702.154-168

A theoretical basis for the methods to restore working capacity of valve-actiating gear of the cylinder block head

Petr V. Senin
Vice-Rector for Science, National Research Mordovia State University (68 Bolshevistskaya St., Saransk 430005, Russia), Dr.Sci. (Engineering), professor, ORCID: http://orcid.org/0000-0003-3400-7780, This email address is being protected from spambots. You need JavaScript enabled to view it.

Nikolay V. Rakov
Associate Professor of Technical Service Machines Chair, Institute of Mechanics and Power Engineering, National Research Mordovia State University (68 Bolshevistskaya St., Saransk 430005, Russia), Ph.D. (Engineering), ORCID: http://orcid.org/0000-0003-3687-9371, This email address is being protected from spambots. You need JavaScript enabled to view it.

Anatoliy M. Makeykin
Lecturer of Technical Service Machines Chair, Institute of Mechanics and Power Engineering, National Research Mordovia State University (68 Bolshevistskaya St., Saransk 430005, Russia), ORCID: http://orcid.org/0000-0003-4629-0886, This email address is being protected from spambots. You need JavaScript enabled to view it.

Introduction: The article describes the method of reliability improvement of the valveactiating gear of the cylinder block head.
Materials and Methods: The method of the dimensional analysis was used for definition of the possible travel of hydro compensator valve mechanisms in the new and used cylinder heads of ZMZ 406 motor. The method is based on micrometer research and precise calculations.
Results: The hydro compensator travel in the valve mechanisms of new motor cylinder heads of ZMZ-406 engine is 2.3 mm with maximum deviations of ±0.15 mm. An estimation of dimensional chain was calculated for the rational methods of recovery. The limit values of surface wear were used as the limits of component links. The values were obtained using micrometer researches of used heads of cylinder blocks. When the best combination of wear, possible hydrocompensator travel is 1.98 mm, and when the worst one minus is 0.74 mm, that is, the hydrocompensator travel is not enough to compensate for the wear of component parts.
Discussion and Conclusions: The authors of the article propose four ways to improve efficiency of valve mechanisms. As a criterion for selecting a method of repair is proposed to use the total value of the valve. Sinkage for the proposed methods, hydrocompensator travel after repair is from 1.57 to 2.36 mm, which corresponds to the hydrocompensator travel of the new motor cylinder heads.

Keywords: cylinder block head, valve mechanism, valve, hydrocompensator bar, restoration, working capacity, repair mode, dimensional chain

For citation: Senin P. V., Rakov N. V., Makeykin A. M. A theoretical basis for the methods to restore working capacity of valve-actiating gear of the cylinder block head. Vestnik Mordovskogo universiteta = Mordovia University Bulletin. 2017; 27(2):154-168. DOI: 10.15507/0236-2910.027.201702.154-168

Acknowledgements: The research was carried out with the support of the project no. g/b 2-17 Development of Technologies and Means for Increasing the Durability of Parts, Units, Machines and Equipment Assemblies by Creating Nanostructured Coatings with Sources of Concentrated Energy, the project part within the framework of the work Conducting Research Works (Fundamental Scientific Research, Applied Research and Experimental Development).

Contribution of the co-authors: P. Senin: scientific supervision, analysis and revision of the draft; N. Rakov: writing the draft, reviewing and analyzing the literature; A. Makeykin: analyzing the literature, writing the final text.

This work is licensed under a Creative Commons Attribution 4.0 License.