Transmission Characteristics Analysis And Experiment Of Heavy Duty Marine Gearbox

The research subject of the dissertation stems from the projects “The Study andApplication of Key Technologies of Lightweight Gearbox(2011BAF09B07)” in theNational Science and Technology Pillar Program during the12th Five-Year Plan periodof China, respectively. The program is aim to realize industrialized production oflightweight and high-power Heavy Duty Marine Gearbox, which main technicalindicators will reach the international advanced level. With the implementation of thegovernment’s plan of shipping revitalization and the rapid development of marineeconomy, as the basic part of ship, the demand of large marine reduction gear isincreasing yearly. Due to the special working condition, comprehensive technicalperformance indicators of high-power marine gearbox is much higher than others. Inthis subject, selecting to study the key technology of high-power marine gearbox’sdesign, has important theoretical significance and engineering practical value.The paper is based on the principle of gear meshing, tooth contact analysis,structural topology optimization, gearbox test methods etc., combined with finiteelement analysis and optimization method of structural parameters. Therefore, theflexible structure model of high-power marine gearbox system is established to conductoptimization analysis and experimental test for the key problems of mechanicalperformance and transmission characteristics.The main contents are as follows:①A fter analyzing the basic structure and transmission principle ofGWC66.75Ahigh-power Marine gearbox, the flexible gearbox structure model is established byusing MASTA, to conduct assembly interference checking and movement simulation.Considering the flexible structure of cabinet, the stress distribution of gearbox bodyunder different working conditions, the strength of the transmission shaft, the servicelife of bearing, gear strength and dislocation are analyzed to verify the rationality of thegearbox design.②By analyzing the solution of the transmission efficiency of gearbox underdifferent working conditions and transmission error and system error of single stagegear, the research focus on the effect on the transmission error of center distance errorand axial misalignment.③A ccording to the results of the preliminary analysis,the software Optistruct is used for topology structure optimization of gearbox casing, optimization of the outputstage gear, gear micro modification. Then, comparison is carried out with the resultsbefore and after optimization.④Using high-power marine gearbox structure same as theoretical analysis, we testtransmission efficiency and vibration of the gearbox on the laboratory bench, comparedwith the theoretical analysis results.