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An Numerical Analysis of Gear Tooth Contact & Stress Distribution of Marine Gearbox

Author: PeiJiong
Tutor: ZhuHanHua
School: Wuhan University of Technology
Course: Marine Engineering
Keywords: Marine gear EHL lubrication Contact theory Film
CLC: U664.22
Type: Master's thesis
Year: 2011
Downloads: 101
Quote: 0
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Abstract


The marine gear reducer is a very wide range of applications in the ship machinery, has its presence in the governor shaft, diesel fuel injection system , stranding windlass . Therefore , the failure of the gear will be brought to the normal working of the ship immeasurable impact marine gear failure is mainly in the form of a little erosion , glue , wear , rare cases occur broken , in addition , to reduce vibration and noise become the pursuit of goals . To improve the performance of their work in order to increase the service life of the gear , you can not fail to contact stress distribution gear work research study contact problems must study the state of lubrication of the gear , the stress distribution have to study the strength of the gear analysis , this article is launched from these two perspectives . In this paper, a single-stage inland marine spur gear as the research object , the introduction of the EHL theory , the lubrication of the gear contact parameters calculated the application strength theory , the gear contact stress analysis , to improper guidance gear lubrication contact failure , the main content of the paper can be summarized as follows: Summary of marine gear and failure analysis of the failure of influencing factors that lubrication poor contact caused by the failure of the main causes ; movement and force model , application EHL theory on gear lubrication parameters were calculated , the combined application of elasticity and mathematical algorithms to analyze the strength of gear tooth surface and application of three-dimensional modeling software to establish gear sketch , import ANSYS finite element analysis software to analyze the calculations to obtain gears 3D force condensed results . The numerical results show that : With the increase of the computational domain node , computational speed slows down ; obvious secondary pressure peak oil film pressure , can form a stable oil film ; alternating the meshing line double single engagement point near force worst using the the lubrication results of strength analysis is smaller than the Hertz contact results ; calculated results with the numerical simulation software to calculate the results match .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship machinery > Ship shaft,gear,and car device > Gearing
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