RETRACTED: Increasing the performance of the gas distribution mechanism with traverse medium-speed engine
Abstract
Increasing the efficiency of the gas distribution mechanism (GDM) with a traverse of medium-speed diesel engines is of great practical importance.
The design of the mechanism links should ensure both the reliability of the valves in the entire range of speed modes and loads encountered during engine operation, and the durability of all parts without complicating the design.
The article presents the results of the calculation of the elements of the GDM with a traverse, recommendations are given to improve their performance. The calculation of the stress-strain state (SSS) of the contact pair "plate-crackers-valve stem" of a medium-speed engine FT26,5/31 was carried out.
Calculations are made for the valve group of inlet valves, taking into account the greater mass and, accordingly, the large forces of inertia of the valve. An analysis of the SSS of the initial version of the designs of crackers, plate, valve and modified designs of these parts was carried out. As a result of the calculation of the stress-strain state of the valve group with a modified design of crackers and valve discs, a significant reduction in maximum stresses with their more uniform distribution over the surface in the maximum power mode has been obtained.
About the Authors
Nikolai D. Chainov
BMSTU
Russian Federation
Russian Federation
Dr. Sc., professor
Andrey N. Krasnokutsky
BMSTU
Russian Federation
Russian Federation
Ph.D., associate professor
Andrey A. Varshavsky
BMSTU
Russian Federation
Russian Federation
postgraduate
References
1. Chajnov N.D., Krasnokutskiy A.N., Myagkov L.L. Konstruirovanie i raschet porshnevyh dvigatelej (Design and calculation of piston engines), Mos-kow, BMSTU, 2018, 536 p.
2. Problemy razvitija kombinirovannyh dvigatelej vnutrennego sgoranija (Problems of development of combined internal combustion engines), Moscow, Mechanical engineering, 1968, 303 p.
3. Ryzhov, V.A. Osobennosti proektirovanija bazovoj modeli dizelja no-vogo tiporazmernogo rjada D500K v sovremennyh uslovijah (Features of de-signing the basic model of a diesel engine of a new size range D500K in modern conditions), Saint Petersburg, 2010, pp. 14-15.
4. Sorokin V.G., Volosnikova A.V., Vjatkin S.A. Marochnik stalej i splavov (Steel and alloy grader), Moscow, Mechanical engineering, 1989, 360 p.
5. Chainov N.D., Raenko M.I., Ryzhov V.A. Prochnost teplonapr-jazhennyh bazovyh detalej sredneoborotnyh dvigatelej vnutrennego sgoranija (Strength of heat-stressed base parts of medium-speed internal combustion en-gines), Moscow, Mechanical engineering, 2015, 360 p.
6. Skubachevskij G.S. Aviacionnye gazoturbinnye dvigateli. Konstrukcija i raschet detalej (Aircraft gas turbine engines. Design and calculation of parts), Moscow, Mechanical engineering, 1981, 550 p.
Review
Рецензент: М.Г. Шатров, д-р техн. наук, проф., МАДИ
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