Abstract
We have proposed that the mechanism of such types of belt skew on cone type pulley, crowned pulley, and flat type pulley with inclined axis is based on the presence of an approach angle of a belt center line to a right angle with the pulley axis, and the skew rate is nearly equal to the approach angle. In this paper, another belt skew phenomenon caused by twisted cord is analyzed by FEM and the above mentioned mechanism is confirmed to be valid in this type of belt skew. In the FEM analysis, a calculation model of restoring torque by a twisted cord is studied at first. Then skew of a belt that has Z type twisted cords and is running on two pulleys having equal radius is analyzed and good agreement between results of the analysis and experiments is shown.
