关键词: 涡旋机械, 齿根等效应力, 疲劳强度, 简化计算

Abstract:

The fatigue strength criterion for the root of scroll wrap was ascertained,the simplified formula of Von mises stress of root of scroll wrap acted π-region inner pressure were obtained by fiting the simulated results using finite element method.Considering stress concentration on root of scroll wrap,the safety factor and the minimum calculation safety factor were calculated and the fatigue strength on root of scroll wrap was analysed.All of the calculated examples prove that the calculated results are well agree with the simulated results using finite element method.The study shows that reasonable combination of basic parameter and material is essential to improve the fatigue strength of root scroll wrap and the equivalent loops of the scroll wrap also will be not too much.

Key words: scroll machine, equivalent stress on root of scroll wrap, fatigue strength, simplified calculation