Separated type gearbox processing and assembling method

Abstract

The invention discloses a separated type gearbox processing and assembling method which comprises the steps of acquiring the dimension of a box body, processing the gearbox body, standing the box bodyand relieving pressure, initially detecting the dimension precision, installing a gear and a gearbox, and detecting and adjusting the assembling. The whole separated type gearbox assembling process is changed to the steps of processing the gearbox body, measuring and checking the parallelism and the perpendicularity of each surface of the gearbox body, installing the separated type gearbox and adjusting the clearance of the gearbox, so that the whole technological process is clear and smooth, and a repeated carrying process of current normal operation is reduced.

Description

technical field [0001] The invention relates to the field of engines, in particular to a method for processing and assembling a split gearbox. Background technique [0002] The fuel system of the Win-GD type main engine in the low-speed diesel engine of a large ship is completely different from that of the MAN type main engine. The fuel booster pump is processed again into the fuel injector to complete the injection and combustion of fuel. Among them, the crankshaft gear and the split gearbox gear, and the split gearbox gear and the oil supply unit gear are in a state of mutual meshing in structure, so that the split gearbox gear and the oil supply unit gear are sequentially driven by the rotation of the crankshaft gear. The oil unit assembly provides power support. Therefore, the technical requirements for the meshing of split gearbox gears and oil supply unit gears are very high. Taking RT-flex58T-E model main engine as an example, the gear mesh clearance requirements ar...

AI Technical Summary

Problems solved by technology

[0003] Conventional process plan processing, for the gear box design related installation shaft hole and split mounting surface, the general processing position accuracy is used; the split gear box is pre-assembled, and then pre-positioned after closing; through actual measurement of non-parallel gears The meshing clearance value between the box gear and the gear of the oil supply unit is deduced to deduce the dimensions that need to be processed on the front and back of the gearbox installation, and reprocessing, assembly, and measurement are performed to ensure the final gear clearance requirements; this method generally requires one or two adjustments to the processing and positioning; assembly Low precision, long cycle, relatively high cost

[0004] In addition, the current split gearbox body is a welded part, and the thickness of the welded plate is very thin. After processing, the stress release and cooling shrinkage, although the shape and size of each processing surface have changed, resulting in gear fit clearance beyond the technical Parameter requirements

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