分析齿轮主要参数，提出用测量跨棒（）和公法线长度计算斜齿圆柱齿轮螺旋角的测绘方法，并推导出螺旋角的计算公式。
In this paper calculating method of lead angle of helical gear by measuring span length of length bar and base tangent length is put forward and lead angle calculating formula is deducel.
给出了斜航式法向圆弧螺旋锥齿轮的参数化建模方法。
The parametric modeling method for loxodrome normal circular-arc spiral bevel gear was presented.
利用直齿齿轮泵的困油容积变化公式，求出了斜齿齿轮泵的困油容积变化公式，得到了斜齿齿轮泵不发生困油的螺旋角。
According to the volume oil formula of the straight gear pump, the volume oil formula of the helical gear pump is got and the helix Angle no trapping is found.
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