Calculation and selection of a clearance fit using the theory of hydrodynamic lubrication
https://doi.org/10.26897/2687-1149-2023-5-57-61
Abstract
Hydrodynamic lubrication increases the service life of connections. The quality and durability of connections with hydrodynamic lubrication is determined by functional parameters, including the characteristics of strength, rigidity, wear resistance and accuracy characteristics. In these joints, the accuracy characteristics are gaps, surface roughness of parts, shape deviation and surface arrangement. To ensure the largest supply of materials and parts and the greatest resource, the authors calculated a fit and selected for connecting the plain bearing of the gearbox of the grain drying screw conveyor operating under hydrodynamic friction. For this connection, two fits were chosen by calculation: Ø50H9/g9 and Ø50H7/g6. Based on the rational assignment of the surface roughness of rubbing pairs, it is necessary to assign a fit Ø50H7/g6, which has an accuracy factor of 22. For a fit Ø50H9/g9, the accuracy factor corresponds to 7. The recommended fit Ø50H7/g6 is provided by honing the hole and fine grinding the shaft. It is the fit that provides the largest stock of parts materials for wear and the largest connection resource.
About the Authors
O. A. Leonov
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Oleg A. Leonov, DSc (Eng), Professor
49, Timiryazevskaya Str., Moscow, 127434
Scopus Autor ID: 57209748174;
Researcher ID: ABC-5873-2020
N. Zh. Shkaruba
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Nina Zh. Shkaruba, DSc (Eng), Professor
49, Timiryazevskaya Str., Moscow, 127434
Scopus Autor ID: 57210255441;
ResearcherID: AAF-6340-2019
Yu. G. Vergazova
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Yuliya G. Vergazova, СSc (Eng), Associate Professor
49, Timiryazevskaya Str., Moscow, 127434
Scopus Autor ID: 57210258726;
Researcher ID: AAD-5899-2022
L. A. Grinchenko
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Lavrenty A. Grinchenko, Assistant Professor
49, Timiryazevskaya Str., Moscow, 127434
K. I. Aleksandrok
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Kirill I. Aleksandrok, student
49, Timiryazevskaya Str., Moscow, 127434
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Review
For citations:
Leonov O.A., Shkaruba N.Zh., Vergazova Yu.G., Grinchenko L.A., Aleksandrok K.I. Calculation and selection of a clearance fit using the theory of hydrodynamic lubrication. Agricultural Engineering (Moscow). 2023;25(5):57-61. (In Russ.) https://doi.org/10.26897/2687-1149-2023-5-57-61
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