Herringbone gear assembly positioning method and device, assembling method and high-power diesel engine

Abstract

The invention belongs to the technical field of diesel engine manufacturing, and discloses a herringbone gear assembly positioning method and device, an assembling method and a high-power diesel engine. The herringbone gear assembly positioning method includes the steps that datum tooth scale lines of a right-rotation gear tooth ring and datum tooth scale lines of a left-rotation gear tooth ring are aligned for visual inspection coarse tuning; and datum teeth of the left-rotation gear tooth ring are used as a datum for fixation with fixed positioning teeth of a positioning device, automatic alignment is conducted through movement of movable positioning teeth to obtain the correct positions of datum teeth of the right-rotation gear tooth ring based on the positional accuracy between the movable positioning teeth and the fixed positioning teeth of the positioning device as well as the body dimensional accuracy of the two positioning teeth, and positional assembling between the datum teeth of the right-rotation gear tooth ring and the datum teeth of the left-rotation gear tooth ring is carried out. According to the herringbone gear assembly positioning method and device, the assembling method and the high-power diesel engine, by using the intermediate-speed high-power diesel engine combined-type herringbone gear assembly, assembly accuracy is improved, assembly technology stability is ensured, the economic cost of herringbone tooth gears is reduced, and operational reliability of diesel engine gears is guaranteed; and the application field is broad and the popularization valueis good.

Description

Technical field [0001] The invention belongs to the technical field of diesel engine manufacturing, and in particular relates to a herringbone gear assembly and positioning method, device, assembly method and high-power diesel engine. Background technique [0002] At present, medium-speed and high-power diesel engine gear transmission system is an important part of diesel engine crankshaft drive camshaft transmission system, high and low temperature water pump, fuel pump, oil pump transmission system, and governor transmission system. The manufacturing precision of each transmission gear of a diesel engine directly affects the stability, load uniformity, noise characteristics and operational reliability of the diesel engine. Generally, the gear transmission system of diesel engines uses spur gears, helical gears, and herringbone gears, among which herringbone gears It is equivalent to the combination of two helical gears. It not only has the advantages of helical gears, but also ...

AI Technical Summary

Problems solved by technology

Multiple accumulative errors lead to poor uniformity of the meshing clearance of each pair of herringbone gears of the diesel engine, the measured value of the backlash does not meet the specified requirements, and the contact accuracy of the tooth surface is low

Assembled according to the original method, the meshing clearance of two pairs of herringbone gears has a large difference in one week; check the bonding area with red tan color oil, and the contact area is uneven, only 45%-65%; the diesel engine is in the process of operation, the noise is loud , the tooth surface is easily damaged, the backlash is often out of tolerance during the assembly process of the diesel engine, and the gears are abnormally worn when running on the ship.

Therefore, the assembly technology of the original scheme of the combined herringbone gear can no longer meet the requirements, which has brought quality risks to the diesel engine and caused certain economic losses to the company

[0008] The difficulty in solving the above problems and defects is: according to the reference line of the left-handed ring gear and the right-handed ring gear, visually align the assembly, the assembly accuracy is poor, in the actual meshing and inspection process, the problem of uneven load on the gears cannot be solved, and the contact area is uneven. The average is at a low level of 45%; the company does not have a large meshing table to automatically align and measure in the initial adjustment; the processing equipment cannot process a single involute tooth

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