矿用减速器双压力角弧齿锥齿轮轻量化设计与制造

矿用减速器的结构对整机轻量化影响很大,优化弧齿锥齿轮的结构尺寸能有效减少减速器齿轮、轴承座和箱壳的质量。针对矿用减速器的工作状况,提出在工作齿面采用大压力角,在非工作齿面采用标准压力角的非对称弧齿锥齿轮。对双压力角非对称弧齿锥齿轮的啮合传动原理、齿轮副齿面方程进行了推导,分析非对称设计对工作齿面压力角变化范围的影响,对减速器弧齿锥齿轮齿形进行计算,对比了对称和非对称弧齿锥齿轮主动轮和被动轮。设计并制造了非对称单面刀盘和双面刀盘,加工出双压力角非对称弧齿锥齿轮,通过解析法、有限元法及封闭式齿轮实验台对非对称弧齿锥齿轮承载能力进行计算、仿真和实验。结果表明非对称弧齿锥齿轮轻量化效果明显,轻量化后的非对称弧齿锥齿轮能够替代原减速器对称齿轮。

Design and manufacture of lightweight for spiral bevel gear with double pressure angles of mining reducer

The structure of reducer has a great influence on the lightweight of whole mining machine.Optimizing the structure of the spiral bevel gear can effectively reduce the weight of gear，bearing and box shell.In terms of the working conditions of coal mine reducer，an asymmetric spiral bevel gear with a large pressure angle at driving side and a standard one at coast side was presented.The theory of meshing transmission and the equation of tooth face for spiral bevel gear with double pressure angles were proposed.The effect of asymmetric design on the increase of the pressure angle of driving side was analyzed.The tooth shape of asymmetric spiral bevel gear for main reducer was calculated and then the driving gear and driven gear of asymmetric and symmetric spiral bevel gear were compared.The asymmetric single-side cutter and alternate blade cutter were designed and processed.In this paper，the spiral bevel gears with double pressure angles were manufactured and the experiment of fatigue strength was carried on using a closed test bench.The results show that the effect of asymmetric spiral bevel gear on lightweight is obvious，and the symmetric spiral bevel gear can be replaced by asymmetric gear.