Connecting rod assembly capable of reducing thermal load of piston

Abstract

The invention relates to a connecting rod assembly capable of reducing the thermal load of a piston, and belongs to the technical field of engines. The technical problems of high thermal load, short service life and the like in the using process of an engine piston at present are solved. The connecting rod assembly capable of reducing the thermal load of the piston comprises a rod body, a connecting rod with an oil guide hole in the small end of the connecting rod, a connecting rod bearing bush with an oil guide hole, and a connecting rod bushing with an oil guide groove and an oil guide hole.The oil guide hole of the connecting rod bearing bush, the oil guide hole of a connecting rod body, the oil guide groove and the oil guide hole of the connecting rod bush and the oil guide hole of the small end of the connecting rod form a complete lubricating oil path, so that a piston inner cavity assembled with the connecting rod assembly is actively cooled under the drive of pressure, the reduction of the thermal load of the piston is realized, and an effective way for improving the reliability and durability of the piston is provided.

Description

technical field [0001] The invention relates to a connecting rod assembly for reducing the heat load of a piston, which belongs to the technical field of engines. Background technique [0002] In a piston engine, the function of the connecting rod is to connect the crankshaft and the piston in the engine, convert the reciprocating motion of the piston into the rotational motion of the crankshaft, and transmit the gas pressure on the piston to the crankshaft, and the crankshaft outputs mechanical energy to do work. When the piston reciprocates, it bears the heat load and mechanical load formed by the combustion temperature and the explosion pressure. With the continuous development of engine technology, its compactness and integration are getting higher and higher, and its liter power is also getting higher and higher. In this case, the piston faces a more severe working environment, and piston cooling and thermal failure have become the focus of current piston design. [0...

AI Technical Summary

Problems solved by technology

[0003] At present, the design of reducing the heat load of the piston has been added to the development process of the piston, and the piston internal cooling oil passage and the piston cooling nozzle have been added. However, the internal cooling oil passage of the piston can only reduce the temperature of the piston ring groove and the throat. The temperature at the bottom has little cooling effect; at the same time, the distance between the piston cooling nozzle and the piston keeps changing when the engine is running, which affects the cooling effect

[0004] With the increasing degree of engine strengthening, the explosion pressure in the engine cylinder is increasing, and the use of steel pistons is becoming more and more widespread. Compared with aluminum pistons, the thermal conductivity of steel pistons is lower, resulting in a much higher thermal load on steel pistons. Compared with aluminum pistons, the piston coking tendency is significantly increased, and the high thermal load of the piston will also lead to faster oil deterioration

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