机械加工极齿倒角对磁流体密封装置耐压的影响:仿真分析

The influence of machined pole tooth chamfer on the pressure resistance of magnetic fluid sealing device: simulation analysis

以常规磁流体密封装置为研究对象,考虑极齿的机械加工倒角影响,对比分析了矩形、单侧斜角和双侧斜角极齿倒角前后的耐压特性。研究结果表明:不考虑倒角影响时,矩形极齿、单侧斜角极齿和双侧斜角极齿密封压力理论值分别为0.218 MPa、0.235 MPa和0.224 MPa,矩形和双侧斜角形极齿理论密封压力接近,单侧斜角形理论密封压力最大。考虑倒角影响时,随着倒角半径的增大,矩形极齿理论密封压力近似呈指数递增;单侧斜角极齿理论密封压力先缓慢增大,后近似线性递增;双侧斜角极齿理论密封压力缓慢增大。矩形极齿理论密封压力对倒角变化最为敏感,单侧斜角形极齿次之,双侧斜角形极齿影响较小。这些规律为磁流体密封装置中极齿的实际加工对密封性能的影响提供理论参考。

Taking the conventional magnetic fluid sealing device as the research object, considering the influence of the machining and chamfering of the pole teeth, the pressure resistance characteristics of the rectangular, single-sided and double-sided beveled pole teeth before and after the chamfering are compared and analyzed. The research results show that when the effect of chamfering is not considered, the theoretical values of sealing pressure for rectangular pole teeth,unilateral bevel pole teeth, and double bevel pole teeth are 0.218 MPa, 0.235 MPa and 0.224 MPa, respectively. The theoretical sealing pressure of teeth is close, and the theoretical sealing pressure of unilateral bevel is the largest. When considering the effect of chamfering, with the increase of the chamfering radius, the theoretical sealing pressure of the rectangular pole tooth increases approximately exponentially;the theoretical sealing pressure of the unilateral beveled pole tooth increases slowly at first, and then increases approximately linearly;the double-sided beveled pole The theoretical sealing pressure of the teeth increases slowly. The theoretical sealing pressure of rectangular pole teeth is the most sensitive to chamfering changes, followed by unilateral beveled pole teeth, and the influence of bilateral beveled pole teeth is less.These laws provide a theoretical reference for the actual machining of the pole teeth in the magnetic fluid sealing device for the influence of the sealing performance.