船用高速齿轮齿根弯曲疲劳强度的计算  

A Calculation of the Tooth-root Bending Fatigue Strength of a Marine High-speed Gear

作　　者：李秀莲[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《热能动力工程》2009年第3期373-377,共5页Journal of Engineering for Thermal Energy and Power

基　　金：江苏省高校自然科学基础研究自筹经费项目(08KJD460009)

摘　　要：当船舶劈波斩浪时,因受水浮力、船舶重力等作用,船体将产生中拱或中垂弯曲变形,该变形影响到沿船体纵向布置的齿轮的强度和寿命。针对传统的船用高速齿轮在强度计算中不计齿间摩擦、离心力和船体变形的缺陷和不足,以沿船体纵向布置的渐开线增速齿轮机构中主动轮为研究对象,推导出综合考虑齿间摩擦、离心力和船体变形的齿根弯曲疲劳强度计算公式。算例表明,齿间摩擦使齿根弯曲应力增加9.98%,离心应力占齿根弯曲许用应力的11.18%,船体变形使齿根弯曲应力增加7.25%。When a ship ploughs the high seas,its hull will produce a hogging or sagging bending deformation due to the action of water buoyancy and ship weight etc.,which influences the strength and service life of gears arranged in the hull longitudinal direction.In the light of defects and deficiencies of traditional marine high-speed gears caused by neglecting the inter-tooth friction,centrifugal force and hull deformation during strength calculations,with the driving gear in the involute speed-up gearing unit arranged along the hull longitudinal direction serving as an object of study,derived for the tooth-root bending fatigue was a strength calculation formula with comprehensive consideration of inter-tooth friction,centrifugal force and hull deformation.Calculation cases show that the inter-tooth friction can lead to an increase of the tooth root bending stress by 9.98% with the centrifugal stress accounting for 11.18% of the tooth-root bending permissible stress,while the hull deformation may cause an increase in the tooth-root bending stress by 7.25%.

关 键 词：齿间摩擦 离心力 船体变形 直齿轮 弯曲疲劳强度 

分 类 号：U664[交通运输工程—船舶及航道工程] TH132.41[交通运输工程—船舶与海洋工程]