Jiao Wei,Xu Kejun,Qin Haiqin.Research on the Time-varying Meshing Stiffness Algorithm of Spur Gears with Large Tooth Number Cracks[J].Journal of Mechanical Transmission,2023,47(06):8-15.
Jiao Wei,Xu Kejun,Qin Haiqin.Research on the Time-varying Meshing Stiffness Algorithm of Spur Gears with Large Tooth Number Cracks[J].Journal of Mechanical Transmission,2023,47(06):8-15. DOI: 10.16578/j.issn.1004.2539.2023.06.002.
Research on the Time-varying Meshing Stiffness Algorithm of Spur Gears with Large Tooth Number Cracks
based on the geometry of cutting teeth and the principle of gear meshing
the difference between the starting point of the involute profile and the intersection of the involute and the base circle is clarified
and the transition curve parameter equation is introduced to calculate the time-varying meshing stiffness based on the energy method. The formula has been improved
and the faulty gear tooth models with different crack degrees are comprehensively established. On this basis
the oblique line is used as the effective tooth thickness reduction limit line
which makes the crack tooth model stricter and the considerations more comprehensive. With reference to the calculation results of the finite element method
the effects of model correction
crack extent
and the specific form of the effective tooth thickness reduction limit line on the time-varying meshing stiffness are discussed respectively. The calculation results show that the uncorrected gear tooth model will lead to a small calculation result of the time-varying meshing stiffness of gears with large numbers of teeth; the reduction degree of meshing stiffness increases with the increase of the crack level. According to the degree of cracks
the modeling suggestion for the effective tooth thickness reduction limit line is given: when the crack level is low
the effective tooth thickness reduction limit line should be a straight line; when the crack level is high
using a straight line will cause significant errors. Using a diagonal line is not only convenient for calculation
but also can meet the requirements of calculation accuracy and has stronger practicability.
关键词
大齿数齿根裂纹不同裂纹程度有效齿厚削减限制线时变啮合刚度
Keywords
Large numbers of teethTooth root crackDifferent degrees of cracksEffective tooth thickness reduction limit lineTime-varying meshing stiffness
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