...：通风机；声功率级；测定；包络面法 [gap=872]Key words: fan; sound power level; determination; enveloping surface method ...
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The optimum design of plane quadratic enveloping ring surface worm drive has been realized using the theory and method of optimization.
针对平面二次包络环面蜗杆传动，运用优化理论和方法，对其进行了优化设计。
A method of modifying the double enveloping worm gearing with developable tooth surface has been proposed to reduce the sensibility of the worm gearing to the manufacturing errors.
提出了对二次包络环面蜗杆传动修形的方法，以降低蜗轮副对制造误差的敏感性。
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