Positioning tool and method for assembling crankshaft sprocket of marine low-speed diesel engine

Abstract

The invention provides a positioning tool and method for assembling of a crankshaft and a chain wheel of a marine low-speed diesel engine. The positioning tool comprises a right positioning plate and a left positioning plate. The positioning tool is mounted on the sprocket by means of a technological hole, the right positioning plate and the left positioning plate are each provided with a chain wheel positioning surface and a crankshaft thrust disc positioning surface which are used for positioning the relative locations of the chain wheel and the crankshaft, and positioning of the relative locations of the crankshaft and the chain wheel in the assembling process is guaranteed by making the positioning surfaces of the two positioning plates be tightly attached to the side face of the chain wheel and the side face of the crankshaft correspondingly. By adoption of the positioning tool and method, the effects of simplifying the installing process and improving the working efficiency and the installing precision are achieved, and the positioning tool and method are suitable for shrinkage-fit assembling of the crankshaft and the chain wheel.

Description

technical field [0001] The invention relates to a tooling for assembling a marine low-speed diesel engine, in particular to a positioning tool and a method for assembling a crankshaft sprocket of a marine low-speed diesel engine, and belongs to the technical field of diesel engine manufacturing. Background technique [0002] The sprocket on the crankshaft thrust plate of marine low-speed diesel engine is generally installed on the crankshaft by the "red sleeve" process. The inner diameter of the center hole of the sprocket of the outer diameter of the crankshaft thrust disk is enlarged and larger than the outer diameter of the crankshaft thrust disk, and then the sprocket is quickly inserted into the outer circle of the crankshaft thrust disk. After the sprocket is completely cooled, the center hole shrinks And tightly hoop the thrust disc of the crankshaft, the two achieve an interference fit, so that the sprocket and the crankshaft are firmly connected together. The "red ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of inconvenient installation of the crankshaft sprocket of the marine low-speed diesel engine, cumbersome adjustment process of positioning tools, long time-consuming and unreliable problems, and provide a more convenient and efficient operation for the assembly of the crankshaft sprocket of the marine low-speed diesel engine With the help of the process hole on the sprocket, the positioning surface of the positioning plate, the end surface of the sprocket and the end surface of the crankshaft thrust plate can be used to ensure the positioning of the crankshaft and the sprocket during the assembly process, so as to simplify the installation process and improve Effects of work efficiency and mounting accuracy

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