Method for manufacturing casting trigger ring of main machine

Abstract

The invention discloses a method for manufacturing a casting trigger ring of a main machine. A trigger ring and a flywheel are integrally cast; an arc narrow semicircular ring greater than 180 degrees is cast at the outer side of the flywheel, the allowance of 10 mm is reserved at the front end and the rear end of the semicircular ring and the radial outer circle, and the axial height of the casting trigger ring is increased by 5-10 mm; and when the flywheel is machined, only the outer circle of the trigger ring needs to be machined, and the end surface and the end part of the trigger ring need to be flattened, therefore, the 180-degree arc narrow semicircular ring which is 50 mm in height and 40 mm in width is machined. The method has the advantages of being universal, safe, stable and low in cost, the limitations of space and temperature, influences of vibration and influences of assembly precision of workers are thoroughly avoided, the cost is reduced, the efficiency is improved, the construction intensity of the workers is reduced, the assembly quality of the main machine is improved, and the cost of the main machine is reduced.

Description

technical field [0001] The invention relates to the field of manufacturing high-power low-speed marine diesel engines, in particular to a method for manufacturing a flywheel trigger ring for measuring the rotation angle of the crankshaft relative to the flywheel. Background technique [0002] Low-speed diesel engine combustion control requires angle signals, and angle measurement not only requires sensors but also angle trigger rings. Often the trigger rings are installed on the inner or outer surface of the flywheel of the diesel engine. It consists of 8 arc narrow rings with a thickness of 15mm and a width of 40mm. The 180° The ring is fixed on the side of the flywheel through 16 M16 bolts, and the relative position between the trigger ring and the sensor is adjusted through the distance tube during assembly. Whether it is component production or assembly and installation, this method has many disadvantages. Each segment of the trigger ring is very thin and narrow, and th...

AI Technical Summary

Problems solved by technology

Each segment of the trigger ring is very thin and narrow, and the joint is complicated to process, requiring high dimensional accuracy (to ensure the size after assembly), which increases the production cost; the trigger ring is arranged inside the flywheel, due to the narrow space between the flywheel and the frame , the construction is difficult for the workers, and they are arranged outside the flywheel. Due to the height of the flywheel of the main engine, it is necessary to install the climbing tool before construction. The construction needs to climb high, and the risk factor is high.

In addition, especially in the northern winter, affected by the temperature, the trigger ring composed of 8 segments is difficult to ensure concentricity, and it is difficult for workers to adjust

Images