| Abstract: | | 1. |
Deformations of cylinder liners and blocks of small Diesel engines reduce the life of the engines and have an adverse effect on other technical and economic indicators. Reduction of nonuniformity of deformation of cylinders in assembly by 15–20% increases the life of parts of the cylinder and piston group by more than 20%.
| | 2. |
The newly devised method of theoretical and experimental investigation of the state of stress and strain of cylinder liners in different cases of their loading in the process of assembly showed good agreement of the results with the data of statistical analysis of the deformation, and the method can therefore be recommended for the stress analysis of engines with other standard sizes and technological processes of their assembly.
| | 3. |
The forces arising in the assembly of small Diesel engines in the mating parts lead to nonuniform deformations of these parts. For instance, pressure of the rubber gaskets causes the working surface of the cylinder to assume barrel shape, and nonuniform structural rigidity of the bearing surfaces of the cylinder block is the cause of ovality of the cylinder bores.
| | 4. |
The introduction of design and technological methods of reducing deformation helped improve the technical and economic indicators of Diesel engines (in particular, the life of cylinder liners was extended by more than 20%).
|
Dagestan Polytechnic Institute, Makhachkala. Translated from Problemy Prochnosti, No. 6, pp. 110–114, June, 1988. |
