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本文提出从直齿圆柱齿轮的轮齿端面开轴向通孔——中空齿,以降低轮齿刚度及改善轮齿散热条件,从而提高齿轮传动的承载能力,采用有限元法对轮齿进行刚度和应力计算并用国家标准(CB3481—83)的齿轮计算方法计算得出,这种轮齿齿面的计算接触应力较之一般轮齿约低7％,齿根的计算弯曲应力约低11％;并能有效地减轻振动和噪声。本文还给出了非变位轮齿上通孔以直径为0.6倍模数和距齿顶1.4倍模数较适宜的计算结果。这种措施对于模数较大的直齿圆柱齿轮传动有实际意义,在相同运转条件下工作时,齿轮的寿命可增加一倍以上。
In this paper, the axial through-hole-hollow tooth is opened from the tooth face of the spur gear to reduce the gear tooth rigidity and improve the cooling conditions of gear teeth, so as to improve the carrying capacity of the gear transmission. The gear tooth stiffness And stress calculation and using the gear calculation method of the national standard (CB3481-83), the calculated contact stress of the gear tooth surface is about 7% lower than that of the ordinary gear tooth and the calculated bending stress of the tooth root is about 11% lower; And can effectively reduce vibration and noise. In this paper, we also give a more appropriate calculation result of the through-hole of non-displacement gear with the module of 0.6 times the diameter and the module of 1.4 times the addendum. This measure for the larger modulus spur gear transmission of practical significance, under the same operating conditions, the gear life can be more than doubled.