Protecting device and method for preventing cylinder sleeve from being pull-damaged when piston and connecting rod assembly of diesel engine is assembled and disassembled

Abstract

The invention provides a protecting device and method for preventing a cylinder sleeve from being pull-damaged when a piston and connecting rod assembly of a diesel engine is assembled and disassembled. Aiming at the piston and connecting rod assembly of the diesel engine, guide blocks are mounted on a connecting rod body, a guide rod is arranged at the upper end of one rod body large end upper cover stud, in the assembling process of the piston and connecting rod assembly, one-side protection is adopted, the guide rod on the rod body large end upper cover stud on the opposite side is used forguiding and centering, in the disassembling process of the piston and connecting rod assembly, the guide blocks are mounted on the two sides of the connecting rod body, and two-side protection is adopted. In the assembling downwards-moving process and the disassembling upwards-moving process of the piston and connecting rod assembly, the guide blocks with low hardness make contact with the cylinder sleeve, the connecting rod body is prevented from making contact with the inner wall of the cylinder sleeve, and pull-damage of the connecting rod body to an inner hole of the cylinder sleeve in the whole machine assembling and disassembling processes of the piston and connecting rod assembly of the diesel engine is avoided. In the second half route of piston and connecting rod assembling, theguide rod on the rod body large end upper cover stud is used for rapid centering, radial displacement of the connecting rod body cannot be generated, the connecting rod body is prevented from directlymaking contact with the inner hole of the cylinder sleeve, the mounting efficiency is improved, and the mounting quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of diesel engine assembly, and in particular relates to a protection device and method for preventing cylinder liners from being strained by assembly and disassembly of a piston connecting rod assembly of a diesel engine. Background technique [0002] The installation process of piston and connecting rod assembly of medium and high-speed high-power diesel engine is one of the key processes of diesel engine assembly. There are two ways to connect the three-section connecting rod body and the large end cover of the connecting rod. One structure is connected by four bolts. There are two symmetrical distributions on both sides of the center line of the large end hole of the rod, and the protection device is positioned with two holes on one side, which is easy to realize; another structure is two stud connections, such as Figure 7 As shown, there is one symmetrically distributed on both sides of the center line o...

AI Technical Summary

Problems solved by technology

Therefore, the existing protection device technology can no longer meet the requirements, and has caused certain economic losses to production, so it is necessary to propose improvements

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