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Research on Characteristics of an Equipment’s Slewing Bearing System in Underwater Pressure Environment

Author: LiGuangHua
Tutor: TangGuoYuan
School: Huazhong University of Science and Technology
Course: Marine Engineering
Keywords: Underwater equipment Slewing ring Load distribution Fatigue life Ferrule deformation
CLC: TJ6
Type: Master's thesis
Year: 2011
Downloads: 15
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Abstract

Underwater slewing ring system has an important role for the reliable operation of the equipment in an underwater depth study is necessary . In this paper , a kind of underwater three-row cylindrical roller slewing ring system as the research object , the basic theory and method of use of Hertz linear elastic contact theory and Lundberg-Palmgren fatigue life theory , considering the specificity and complexity of the underwater pressure environment , respectively two installation methods of the inner ring , the different structural parameters and load parameters on the the slewing ring system load distribution characteristics and the effects of fatigue life . Slewing ring system the inner ring and the outer surface of the hollow cylindrical structure attached installation as a whole , based on a rigid collar assumptions , analysis of the the slewing bearing clearance system load distributed computing model , the introduction of the the slewing ring system limit radial clearance of expression and improve the limit radial clearance measures , using the iterative method in MATLAB programming for solving different radial clearance , radial load , the number of roller , roller diameter and length of the roller when the load distribution and changes of the fatigue life . For the deformation of a hollow cylindrical structure caused by the pressure difference between the inside and outside of the inner ring in the underwater pressure environment , using the least squares method to fit the shape of the inner ring after deformation ellipse, before deformation the maximum contact load in the rotary bearing system the top of the roller , the deformed contact load located on both sides of the line of action of the radial load , load distribution is obviously different before and after deformation . Underwater slewing ring system of nonlinear dynamics simulation model , the results showed that the inner ring deformed rotational characteristics variation . Slewing ring system the inner ring with the interference fit sets installed in the outer surface of the hollow cylindrical structure , the combination of the two at the gap clearance compensation compensation generated by the pressure difference between the inside and outside of the role of the hollow cylindrical structure , finite element software COSMOS / simulation analysis results show that reasonable assurance as to the the clearance compensation arrangement and number as well as the inner ring thickness parameters slewing ring performance optimization . The results of this study for the design, manufacture and maintenance of underwater slewing ring system has theoretical significance and value in engineering .

Research on Characteristics of an Equipment’s Slewing Bearing System in Underwater Pressure Environment

Abstract

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