| Autor: |
Zinnatullina, Alsu, Kiseleva, Natalia, Rakhmatullina, Rezida, Maskova, Albina, Nigmatullina, Iia |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2911 Issue 1, p1-5, 5p |
| Abstrakt: |
The agro-industrial complex is an important branch of the national economy. The operation of agricultural machinery also occupies an important place in the agro-industrial complex. To ensure the efficiency of agricultural machinery with low financial costs is an urgent task. This paper presents an analysis of the problem of failure of agricultural machinery. The main reasons leading to the failure of rolling bearings are considered. The paper describes the possibility of using polymer materials to restore worn parts and to strengthen parts during their repair. Dielectric and thermophysical properties show huge values for many types of industries, electrical engineering. The dielectric properties of polymers are closely related to their molecular structure, depend on the chemical composition, on the structure of the chains. There are different methods for determining the dielectric properties of polymers: bridge, resonant, wave. Of the listed known methods for studying dielectric characteristics, the theoretical foundations of the resonance method are described in detail in this paper. The thermophysical and dielectric properties of polymer materials have been studied: polyvinyl carbazoles, polymethylmethacrylate and polymethylacrylate. Permittivity and dielectric losses have been studied in a wide range of temperatures and frequencies. The values of the dielectric permittivity are determined, the values of the activation energy of polymers are calculated using the Arrhenus formula. Thus, dielectric parameters are important characteristics of polymer materials. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
