CN-121989040-A - Machining assembly and centering adjustment method for split herringbone gear shaft

CN121989040ACN 121989040 ACN121989040 ACN 121989040ACN-121989040-A

Abstract

The invention relates to the technical field of herringbone gear shaft assembly, and discloses a processing assembly and centering adjustment method of a split herringbone gear shaft, which comprises the following steps that A, one end face of a first gear is selected and marked as a first gear reference end face; the method comprises the steps of selecting one end face of a second gear, marking the end face as a second gear reference end face, drying and installing a first gear and a gear shaft, marking a reference line on the first gear, extending the reference line along the axial direction and marking a contraposition line on the gear shaft correspondingly, drying and installing the second gear and the gear shaft in the step C, installing a matched herringbone gear shaft and the split herringbone gear shaft in the step D into a box body, and centering and adjusting the split herringbone gear shaft in the step F. The invention aims to provide a processing, assembling and centering adjustment method for a split type herringbone gear shaft, so as to ensure that the split type herringbone gear shaft can meet the design centering requirement after being baked.

Inventors

CHU CHUANHAI
LI JINCHAO
DI CHENGBAO
Zhou Hansong
FU XIANG
QIN QI
SONG YANG
AO CHENGBIN
ZENG FANEN

Assignees

重庆齿轮箱有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260317

Claims (10)

1. A processing, assembling and centering adjusting method of a split herringbone gear shaft is characterized by comprising the following steps of: The method comprises the following steps: step A, selecting one end face of a first gear, and marking the end face as a first gear reference end face; step B, baking the first gear and the gear shaft; Marking a datum line on the tooth top of any tooth on the first gear, wherein the datum line extends along the axial direction of the gear shaft, and the projection mark of the extension line of the datum line on the gear shaft is aligned; step D, baking the second gear and the gear shaft in the step C; d1, marking an installation line on the tooth top of any tooth of the second gear, and simultaneously extending the installation line to the position, close to the inner hole of the gear, of the other surface of the reference end surface of the second gear, and marking the installation line; d2, baking the second gear and the gear shaft in the step C, wherein a security line and an alignment line are required to be overlapped during baking, and the gear shaft, the first gear and the second gear set are separated into a herringbone gear shaft; step E, loading the matched gear shaft and the split herringbone gear shaft in the step D into a box body; E1, loading the matched gear shaft into a box body, and fixing two ends of the matched gear shaft; e2, loading the split herringbone gear shaft into a box body, and enabling the tooth tops between the split herringbone gear shaft and the matched gear shaft to be opposite to tooth grooves; E3, detecting whether deviation exists between the centering line of the split type herringbone gear shaft and the centering position in the box body, and if the deviation exists between the centering line of the split type herringbone gear shaft and the centering position, centering and adjusting the split type herringbone gear shaft; step F, centering adjustment is carried out on the split type herringbone gear shaft, and the deviation distance between the centering line of the split type herringbone gear shaft and the centering position in the box body is assumed to be L2; F1, performing temporary circumferential separation on the first gear or the second gear and the gear shaft mounting surface, so that the first gear or the second gear and the gear shaft can relatively rotate; f2, applying axial force to one end of the split type herringbone gear shaft, and simultaneously rotating a gear at the other end applying the axial force; And F3, when the gear shaft moves axially by the displacement L2, the matched gear shaft is correctly meshed with the split herringbone gear shaft, and centering adjustment is completed.
2. The method for machining, assembling and centering adjustment of a split herringbone gear shaft as claimed in claim 1, wherein the first gear and the second gear are subjected to gear grinding operation before the step A.
3. The method for machining, assembling and centering adjustment of the split type herringbone gear shaft according to claim 1, wherein the gear shaft in the step B is of a symmetrical structure, shaft necks for installing a first gear or a second gear are arranged at two ends of the gear shaft, and shaft shoulders are arranged at one end, close to the middle of the gear shaft, of the shaft necks.
4. The method for machining, assembling and centering adjustment of the split type herringbone gear shaft according to claim 3, wherein a plurality of oil channels are respectively arranged at two ends of the gear shaft, oil inlets of the oil channels are located on the end face of the gear shaft, and oil outlets of the oil channels are located on the surface of the shaft neck.
5. The method for machining, assembling and centering adjustment of the split herringbone gear shaft according to claim 4, wherein when the first gear and the gear shaft are baked in the step C, the reference end face of the first gear needs to be clung to a shaft shoulder on one side of the gear shaft.
6. The method for machining, assembling and centering adjustment of the split type herringbone gear shaft according to claim 1, wherein the step C comprises the following steps: C1, selecting a tooth on a first gear as a first gear reference tooth, and drawing a tooth top center line at a position, which is away from a first gear reference end face L1, of the first gear reference tooth to serve as a reference line; And C2, extending the tooth top central line of the first gear reference tooth along the axial direction of the gear shaft, and marking the projection of the extending line of the reference line on the shaft neck and the end face of the gear shaft as an alignment line.
7. The method for machining, assembling and centering adjustment of a split type herringbone gear shaft according to claim 1, wherein in the step D1, a tooth is selected as a second gear reference tooth on the second gear, and a tooth top center line is drawn at a position, away from the second gear reference end face L1, of the second gear reference tooth to serve as an installation line.
8. The method for machining, assembling and centering adjustment of the split type herringbone gear shaft according to claim 1, wherein when the second gear is baked with the gear shaft in the step D, the reference end face of the second gear needs to be clung to a shaft shoulder on the other side of the gear shaft.
9. The method for machining, assembling and centering adjustment of the split type herringbone gear shaft according to claim 1, wherein in the step F2, high-pressure oil is filled into an oil duct at the other end of the split type herringbone gear shaft, wherein the inner gear hole of the first gear or the second gear is expanded under the action of oil pressure, and a gap is formed between the inner surface of the inner gear hole and the outer surface of the gear shaft, so that the first gear or the second gear can rotate relative to the gear shaft.
10. The method for machining, assembling and centering adjustment of the split herringbone gear shaft according to claim 1, wherein a first distance ring and a second distance ring are respectively arranged at two ends of the gear shaft.

Description

Machining assembly and centering adjustment method for split herringbone gear shaft Technical Field The invention relates to the technical field of herringbone gear shaft assembly, in particular to a machining assembly and centering adjustment method of a split herringbone gear shaft. Background In the field of transmission machinery, the split type herringbone gear shaft is widely applied to various high-power transmission systems of heavy machinery, chemical equipment, mining machinery and the like by virtue of the advantages of strong bearing capacity, stable transmission, self-balancing axial force and the like. The gear shaft is formed by combining a gear shaft body with two gears which rotate left and right, the gear shaft body and the matched herringbone gear shaft are required to be jointly arranged in a box body during assembly, the accurate coincidence of the actual centering line of the split herringbone gear shaft and the designed centering position in the box body is required to be ensured, and meanwhile, the centering line of the split herringbone gear shaft and the centering line of the matched herringbone gear shaft are kept in strict alignment. At present, a technical scheme of key connection positioning is commonly adopted in the industry aiming at the installation and centering of the split type herringbone gear shaft. Specifically, a key groove is processed at the matching position of the gear shaft body and the corresponding gear, and circumferential positioning of the gear and the gear shaft is realized through connectors such as a flat key, a spline and the like. However, the key connection mode has an influence on the structural strength of the gear shaft and the gear, and the split type herringbone gear shaft under the scene of partial high power and high load does not allow a key slot to be formed on the gear shaft due to the requirements of structural design and strength guarantee, so that the difficulty in assembly centering is greatly increased due to the lack of a circumferential positioning reference. The split type herringbone gear shaft is used on a ship lift, the ship with the weight of more than 3000T can be lifted, the lifting height of the ship is more than 100m, the split type herringbone gear shaft is used as a core transmission component of the ship lift and is usually arranged on a steel structure platform with the height of 80 m, the diameter of a gear is more than 3m, the total length of a shaft system is more than 15m, and the weight of a single piece is more than 23T. Because the traditional key groove cannot be adopted to provide a positioning reference in the circumferential direction, when the two huge gears are baked with the gear shaft, the two huge gears are in a reference-free state in the circumferential direction, and are assembled only by operation experience, the remarkable angle deviation is very easy to generate, and the herringbone tooth helix angle can amplify the tiny circumferential angle deviation into huge axial centering deviation, so that the subsequent box cannot be assembled at all to be meshed with the matched gears. The existence of the helical angle of the herringbone teeth makes the centering error control extremely sensitive, and a scribing line or assembly deviation of only 0.1 millimeter level in the circumferential direction can possibly cause axial dislocation of a plurality of millimeters after the helical angle conversion, and far exceeds the allowable tolerance, so that the two half herringbone teeth cannot be synchronously borne, and serious unbalanced load and vibration are generated. Disclosure of Invention The invention aims to provide a processing, assembling and centering adjustment method for a split type herringbone gear shaft, so as to ensure that the split type herringbone gear shaft can meet the design centering requirement after being baked. In order to achieve the above purpose, the invention adopts the following technical scheme: a processing assembly and centering adjustment method of a split type herringbone gear shaft, The method comprises the following steps: step A, selecting one end face of a first gear, and marking the end face as a first gear reference end face; step B, baking the first gear and the gear shaft; Marking a datum line on the tooth top of any tooth on the first gear, wherein the datum line extends along the axial direction of the gear shaft, and the projection mark of the extension line of the datum line on the gear shaft is aligned; step D, baking the second gear and the gear shaft in the step C; d1, marking an installation line on the tooth top of any tooth of the second gear, and simultaneously extending the installation line to the position, close to the inner hole of the gear, of the other surface of the reference end surface of the second gear, and marking the installation line; d2, baking the second gear and the gear shaft in the step C, wherein a security line and an alignment line are