新型人字齿同步带传动干涉与啮合仿真分析

Transmission interference and meshing simulation of double helical synchronous belt

基于Westhoff的同步带与带轮传动啮合干涉评价体系,提出了以人字带齿的包络齿廓与带轮齿槽不干涉作为评判带与轮不产生啮合干涉的新方法。根据人字齿传动特点,设计了一种新型人字齿同步带并建立了求解带共轭齿廓的传动模型。与Eagle PD对比结果表明:新型人字齿同步带传动啮合无干涉;带齿高而陡峭,抗爬齿能力强;带与轮的法面齿形是圆心在节线上圆弧共轭齿,其圆弧半径大,瞬时接触线长,有助于提高带齿接触强度。

A new method was put forward based on Westhoff meshing transmission interference evaluation system. The method was used to judge whether there exists interference between the enveloping tooth profile and pulley tooth groove of the double helical synchronous belt transmission. Then a new double helical synchronous belt was designed and the conjugated tooth profile transmission model was induced on the basis of the double helical transmission characteristics. It is shown that there is no meshing interference in the new double helical synchronous belt compared with the Eagle PD~ the higher and steeper the belt tooth, the stronger the resistance ability to climb. The new normal tooth profile is effective to improve the contacting strength while the radius is larger and the instant engagement line is longer, where the point of the conjugated circular are is on the pitch line.