How to use the on-hook tooling of the piston assembly of the marine low-speed diesel engine

Abstract

The invention discloses a hanging tool for a marine low-speed diesel engine piston assembly and a method using the hanging tool. The hanging tool comprises brackets, a special bolt for piston connection and a gas cylinder body connecting bolt, wherein when the piston assembly is hung, the lower end of the special bolt for piston connection is screwed into a piston bottom pin, and the upper end ofthe gas cylinder body connecting bolt is screwed into a lower bottom plate of the gas cylinder body. The using method comprises the following steps of: separately fastening the brackets to the two sides of the piston bottom pin and the lower side surface of the gas cylinder body; 2) dropping the piston assembly, and supporting the piston assembly through the two brackets; 3) lifting the gas cylinder body onto the upper plane of the rack to fold; 4) enabling an in-machine operator and an outside-the-machine operator to cooperate with each other, and enabling a cross head of a connecting rod tobear weight of the piston assembly through a turning gear; and 5) fixedly connecting the cross head of the connecting rod to the piston assembly, and dismounting the brackets. According to the hangingtool and the method using the hanging tool disclosed by the invention, the potential safety hazards, due to the fact that the piston assembly and the gas cylinder cover are repeatedly dismounted anda travelling crane is lifted by many times, of overhead operation are avoided, the assembly period is shortened, assembly cost is reduced, and assembly efficiency and assembly safety are improved.

Description

technical field [0001] The invention relates to a method for using an assembly tool for diesel engine components, in particular to a method for temporarily fixing a piston assembly of a high-power low-speed diesel engine in a tool for using in a cylinder, and belongs to the technical field of diesel engine manufacturing. Background technique [0002] The rotational speed of marine low-speed diesel engine is 90~200r.p.m. It is the power plant of 10,000-ton ships. Its volume and mass are large, and it is difficult to transport it as a whole. like figure 1 As shown, the marine low-speed diesel engine is divided into three parts: cylinder block 100, frame 200 and machine base 300 from top to bottom. The pieces are assembled together into one, and then proceed to the next step of assembly. After the assembly and commissioning is completed, it is divided into three major parts and transported to the destination, and then assembled again. The upper part of the piston assembly of...

AI Technical Summary

Problems solved by technology

It is time-consuming and labor-intensive, prolonging the installation period of marine low-speed diesel engines, taking a long time to drive and increasing the installation cost, and it is inconvenient and unsafe to use the crane to hoist the piston assembly and connecting rod crosshead to close and connect

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