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April 2015, № 4 (179)



Kulakov A.T., Gaffarov G.G., Akhmetov M.H. THERMOTENSION OF A CYLINDERS SLEEVE OF THE KAMAZ FORCED ENGINES In work results of research of a thermotension of details of interface "the top landing belts of a sleeve of the cylinder — the block of cylinders" at the forced diesels KamAZ are presented. Relevance of research is caused by identification of the reasons of a high pressure the crankcase gases, emission of oil through system of ventilation of a case in the atmosphere at operation of engines. Sleeves of the forced diesels are characterized by high thermal and mechanical tension. On the basis of bench tests of the engine with experimental sleeves the temperature condition of the top landing belt of a sleeve of the cylinder is determined by temperature of melting of the witnesses established on them from POS 61 solder and the settlement analysis of a heat-stressed condition of details of the studied interface is carried out. As a result of calculation it is established that during the operation of the engine on the nominal mode in the considered interface instead of a gap the tightness that causes increase in deformation of a sleeve of the cylinder in addition to its assembly takes place. It can become the reason of breaks of gases from the combustion chamber in an engine case with emission of oil through system of ventilation the crankcase gases in the atmosphere subsequently. The constructive changes offered in work for installation of a sleeve of the cylinder in the block of cylinders allow to organize intensive compulsory cooling of the top zone of a sleeve of the cylinder, to reduce its temperature, thereby to reduce deformations.Key words: sleeves of cylinders, a thermotension, the top landing belt, the forced engines.

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About this article

Author: Kulakov A.T.

Year: 2015


Editor-in-chief
Sergey Aleksandrovich
MIROSHNIKOV

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