Diesel Engine Crankshaft Coupling Installation Tool and Method

Abstract

The invention discloses a tool and method for installing a coupling of a crankshaft of a diesel engine. The tool comprises a transition shaft, a transition shaft connecting pre-tightening device and a coupling moving device, the coupling is arranged on the transition shaft, the transition shaft connecting pre-tightening device comprises a center connecting screw rod, a gasket, a pre-tightening nut and a pre-tightening stretching oil cylinder, and the coupling moving device comprises a supporting plate, two coupling moving screw rods, a locking nut and a pushing nut. The method comprises the following steps that (1) the coupling is installed on the transition shaft, (2) the transition shaft provided with the coupling and the crankshaft are connected and pre-tightened, (3) the coupling moving device is installed, and (4) the coupling is moved to the end of the crankshaft. The tool for installing the coupling of the crankshaft of the diesel engine is compact in structure, convenient to use and low in manufacturing cost. The coupling moving method improves assembling reliability of the coupling, avoids economic losses caused by delivery deadline delay and reworking, and improves assembling work efficiency of the coupling.

Description

technical field [0001] The invention relates to a fixed connection of a shaft with a large interference amount and a disc, in particular to a tool and a method for the fixed connection of a crankshaft end of a diesel engine and a coupling, and belongs to the technical field of diesel engine assembly. Background technique [0002] The crankshaft end of the diesel engine needs to be equipped with a coupling so that it can be fixedly connected with the flywheel through the coupling. The flywheel of the diesel engine can help the piston cross the compression top dead center to achieve the purpose of starting or running smoothly. The coupling and the crankshaft end of the diesel engine are fixedly connected by an interference fit without a key, which is very difficult. For example, the outer diameter of the crankshaft shaft end of the L21 / 31 marine diesel engine reaches Φ200mm, and the interference between the inner hole of the coupling of this model and the outer diameter of the...

AI Technical Summary

Problems solved by technology

For example, the outer diameter of the crankshaft shaft end of the L21 / 31 marine diesel engine reaches Φ200mm, and the interference between the inner hole of the coupling of this model and the outer diameter of the crankshaft shaft end of the diesel engine reaches about 0.30mm, and the conventional interference assembly cannot be used. At this time, the crankshaft has basically been installed, and only the connection and assembly of the two ends are left. It is impossible to install the coupling in other ways to reduce the outer diameter of the crankshaft shaft end.

If improper assembly causes the coupling to fail to reach the required assembly position, the only option is to remove the crankshaft and perform destructive processing on the coupling, which will easily cause damage to the surface of the mating part of the crankshaft and the coupling. In severe cases, the entire crankshaft will be scrapped, resulting in Economic loss due to late delivery and rework

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