Expanding pulling-out device in diesel engine cylinder sleeve

Abstract

The invention provides an expanding pulling-out device in a diesel engine cylinder sleeve. The expanding pulling-out device comprises a conical face drawing rod, a supporting beam, an adjusting casing pipe and multiple expansion blocks. The outer side of the conical face drawing rod is sequentially sleeved and connected with the expansion blocks, the adjusting casing pipe, a first adjusting nut, the supporting beam and a second adjusting nut from bottom to top. The expansion blocks, the adjusting casing pipe, the first adjusting nut, the supporting beam and the second adjusting nut are sequentially connected in a contact manner from bottom to top. According to the expanding pulling-out device in the diesel engine cylinder sleeve, the expansion blocks slide downwards through opening grooves to expand the cylinder sleeve, the cylinder sleeve is lifted upwards through the conical face drawing rod, and the expansion blocks can be attached to the inner wall face of the cylinder sleeve more tightly. The opening grooves are evenly formed in the axial direction of a conical guide face, the attaching stress between the expansion blocks and the cylinder wall is more even, the acting area is enlarged, demounting of the cylinder sleeve is facilitated, and cylinder sleeve inner surface scratches caused by sliding of the expansion blocks are effectively avoided; and meanwhile the problem that the cylinder sleeve with a connecting rod and a piston is hard to demount is solved.

Description

technical field [0001] The invention belongs to the technical field of engine assembly, and in particular relates to a tensioning and pulling-out device for a cylinder liner of a diesel engine. Background technique [0002] The cylinder liner is a cylindrical part on the engine, which is installed in the cylinder liner hole of the body. The piston reciprocates in the cylinder liner hole. High-speed friction with the piston skirt. At the same time, the outer surface is in contact with circulating cooling water, and is subjected to large thermal stress under the action of high and low temperature differences. Therefore, the cylinder liner and the body are very easy to have a slight interference fit so that it is difficult to remove. The high machining accuracy of the inner surface of the cylinder liner requires that the cylinder liner can be protected to the greatest extent during the disassembly and assembly of the cylinder liner to avoid scratches on the inner wall. [00...

AI Technical Summary

Problems solved by technology

[0003] With the continuous strengthening of the diesel engine structure, the power per liter is further increased. In order to withstand greater explosion pressure, some engine connecting rods have been strengthened to a structure in which the size of the connecting rod is larger than the inner hole of the cylinder liner and smaller than the installation hole of the cylinder liner of the body. The process of removing the piston connecting rod and then the cylinder liner is no longer applicable, and the process of pulling out the connecting rod, piston and cylinder liner at the same time must be adopted

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