A laser micro-modeling structure design method for the inner wall of an engine cylinder liner

Abstract

The invention discloses a two-cycle aviation piston engine drive lubrication cylinder sleeve inner wall laser micro-texturing structure design method. The method comprises the steps that firstly, through analysis modeling on boundary lubrication of the two friction pairs including a piston ring-a cylinder sleeve and a piston skirt-the cylinder sleeve which are abraded most severely, micro texturesfollowing the optimal arranging rules are arranged on the surface of the cylinder sleeve in a targeted mode, pits of the micro textures are filled with various abrasive particles in the up-down strokes of a piston and the piston ring, the cylinder sleeve is prevented from being damaged during pulling, and accordingly, the service lives of the cylinder sleeve and an engine comprising the cylindersleeve are prolonged; and secondly, the micro textures following the optimal arranging rules are utilized for organizing motion of lubricating oil film, the oil film is prevented from being broken, the velocity of motion of the lubricating oil film in the axial direction of an air cylinder is decreased, the component velocity in the circumferential direction of the piston ring is increased, thus,the amount of lubricating oil entering a combusting chamber is decreased, and consumption of the lubricating oil is reduced. Meanwhile, the flow rate of the oil film in the circumferential direction of the piston ring is increased, lubrication is improved, the airtightness of a piston ring set is improved simultaneously, and consumption of the lubricating oil is reduced.

Description

technical field [0001] The invention relates to the field of processing the surface topography of a cylinder liner of a two-stroke aviation heavy oil piston engine, in particular to a laser micro-modeling structure design method for the inner wall of the cylinder liner of the aviation heavy oil piston engine. Background technique [0002] The two-stroke aviation heavy oil piston engine is the "heart" of the aircraft. The gas generated by the compression combustion of heavy oil in the cylinder pushes the piston to reciprocate along the axis of the cylinder liner. output torque. Because it is a two-stroke engine, it has compact structure, light weight, and large heat load. During this process, the wear between the piston ring set and the cylinder liner and the piston skirt and the cylinder liner are the two most severely worn pairs of friction in the engine cylinder assembly. Vice, under the conditions of high temperature, high pressure, metal shavings, solid carbon particles...

AI Technical Summary

Problems solved by technology

Cylinder liner surface treatment technologies mainly include mechanical honing and laser micro-modeling. Mechanical honing was applied earlier and the process is mature. Although the processing equipment is simple and low in cost, the obtained lines cannot be adjusted according to needs, and independent pits cannot be processed.

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