分瓣式磁性液体密封的理论及实验研究

发布时间：2019-03-16 15:06

【摘要】：某舰船电机转轴发热量非常大,为了保证电机能够正常平稳的工作,采用了氟利昂进行冷却,但这种物质会对大气臭氧层构成严重的威胁,因此,氟利昂的密封问题至关重要。另外,军方要求在舰船发生故障时,必须保证在电机转轴和整个电机部件不拆卸的情况下完成密封件的更换。由于传统密封无法满足零泄漏、长寿命、高可靠性等要求,而磁性液体密封完全能满足这些要求。所以本课题的目的是设计适用于该舰船电机转轴冷却介质密封的磁性液体密封方案：本论文针对这一目标,完成了以下研究： (1)在学习分析和思考磁性液体密封的基础上,在国内外首次提出了分瓣式磁性液体密封的概念； (2)建立分瓣式磁性液体静密封和旋转密封模型,结合磁性液体Bernouli方程和边界条件,推导分瓣式磁性液体静密封和旋转密封耐压公司 (3)设计适用于舰船电机转轴的分瓣式磁性液体旋转密封方案,完成其中各密封部件的选材及具体结构设计计算； (4)用ANSYS对该分瓣式磁性液体密封结构进行了二维静态磁场的仿真分析； (5)完成分瓣式磁性液体密封可行性验证实验,包括：选择适用于分瓣式磁性液体旋转密封的密封介质,分瓣外套的粘接,分瓣外套的密封检漏实验等； (6)完成分瓣式磁性液体密封件的整体装配,进行了分瓣式磁性液体静密封耐压实验,并且在静密封基础上进行了旋转密封的推导,
[Abstract]:In order to ensure the motor to work smoothly, Freon is used for cooling, but this substance will pose a serious threat to the ozone layer in the atmosphere. Therefore, the sealing problem of Freon is very important. In addition, the military requires that in the event of ship failure, the seal must be replaced without disassembly of the motor shaft and the entire motor component. The traditional seal can not meet the requirements of zero leakage, long life and high reliability, but magnetic liquid seal can fully meet these requirements. So the purpose of this paper is to design a magnetic fluid seal scheme which is suitable for the cooling medium seal of the motor shaft of the ship. The following studies have been completed: (1) on the basis of studying, analyzing and thinking about magnetic fluid seal, the concept of valve magnetic fluid seal has been put forward for the first time at home and abroad; (2) establishing the static seal and rotating seal model of magnetic fluid, combining the Bernouli equation and boundary condition of magnetic fluid. The valve type magnetic fluid seal and rotary seal pressure-resisting company (3) is derived to design the disc magnetic fluid rotary seal scheme which is suitable for the rotor shaft of the ship motor, and the material selection and the concrete structure design calculation of the sealing parts are completed. (4) the two-dimensional static magnetic field is simulated and analyzed by ANSYS. (5) to complete the feasibility verification experiment of the valve magnetic fluid seal, including: selecting the sealing medium suitable for the rotary seal of the valve type magnetic fluid, bonding of the split jacket, sealing leak detection experiment of the split jacket, etc. (6) complete the integral assembly of the valve magnetic liquid seal, carry on the pressure resistance experiment of the split magnetic liquid static seal, and on the basis of the static seal, carry on the derivation of the rotary seal.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB42

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