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.
It is made of aluminum alloy with a certain Angle of helical blade, and is fixed at the front part of shell constriction. It forces the fluid to form strong eddy.
用铝合金制成，具有一定角度的螺旋叶片，它固定在壳体收缩段前部，强迫流体产生强烈的漩涡流。
3
Making use of the points measured on the drum helical curve of concrete-mixer truck, the helicalAngle formula of the helical curve is obtained by means of least square method.