Research on strength calculation method of new internal mesh gears with high contact ratio
JIA Shuang
ZHOU Ruyi
WANG Le
MAO Run
TANG Pei
Abstract：[Objective]While the new type of high engagement internal meshing gears has garnered significant attention and application due to its high load-bearing capacity and multi-tooth meshing characteristics,research on its load capacity predominantly relies on the finite element method(FEM),which fails to meet the demands of engineering popularization.To address this,an engineering-oriented strength calculation method was proposed for the new type of high engagement internal meshing gear.Based on its multi-tooth meshing characteristics and drawing on existing gear strength theory,this method aims to resolve the strength calculation challenges encountered in practical engineering applications of the new gear.[Methods]The distribution law of load between teeth was studied,and the formula for calculating the load on the tooth surface was derived;based on Hertz stress and cantilever beam principle,formulas for calculating tooth contact stress and tooth root bending stress were derived;load correction methods and allowable stress correction methods were studied,and strength conditions were provided.[Results]Compared with the finite element method,the engineering algorithm reduces the calculation time from several hours to several minutes,with a difference of 9.6%in the calculation results.Engineering algorithms can quickly obtain instructive calculation results,facilitating engineers to perform strength calculations on new gears at the beginning of design,which is a key step for new gears to move from theory to application.
Keywords：Gear with high contact ratioStrength calculationEngineering applicationLoad distribution between teeth
Publication Date：2025-12-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 65-71,80 )