CAJ | 학술논문

以高速动车组驱动齿轮箱小齿轮电机端的迷宫密封为研究对象，建立带有甩油环的迷宫密封数值仿真模型---可压缩二维轴对称有旋流动。采用标准k-ε湍流模型和增强壁面处理模拟迷宫密封腔内流场分布及泄漏特性。应用Fluent软件，对Navier-Stokes方程、能量方程和湍流方程采用有限体积法离散，压力-速度耦合采用SIMPLE算法。研究空腔深度对密封性能的影响，确定最优的空腔深度，同时研究压差和转速对泄漏量的影响规律。研究结果表明：随着空腔深度的增加，泄漏量先减小后增大；随着压差的增大，泄漏量增大；在不考虑温升的条件下，转速对泄漏量的影响很小，但随着转速的增大，密封性能提高。
이고속동차조구동치륜상소치륜전궤단적미궁밀봉위연구대상，건립대유솔유배적미궁밀봉수치방진모형---가압축이유축대칭유선류동。채용표준k-ε단류모형화증강벽면처리모의미궁밀봉강내류장분포급설루특성。응용Fluent연건，대Navier-Stokes방정、능량방정화단류방정채용유한체적법리산，압력-속도우합채용SIMPLE산법。연구공강심도대밀봉성능적영향，학정최우적공강심도，동시연구압차화전속대설루량적영향규률。연구결과표명：수착공강심도적증가，설루량선감소후증대；수착압차적증대，설루량증대；재불고필온승적조건하，전속대설루량적영향흔소，단수착전속적증대，밀봉성능제고。
Taking the labyrinth seal at the small-gear motor end of the driving gearbox of the high-speed EM U as the research object ,the numerical simulation model of the labyrinth seal with the oil thrower was set up ,which was fully compressible ,two-dimensional axisymmetric swirl flow .The distribution of flow field within the lab-yrinth seal cavity and the leakage characteristics were simulated by using the standard k-εturbulence model a-long with enhanced wall treatment .The Navier-Stokes equation ,and energy and turbulence equations were dis-creted with the finite-volume method and Software Fluent .The SIMPLE algorithm was used for pressure-ve-locity coupling .The effect of the cavity depth on leakage was studied and the optimum cavity depth was deter-mined .The effects of pressure difference and rotational speed on leakage were also studied .The results show as follows :Along with lengthening of the cavity depth ,the leakage firstly falls down and then rises up ;the leakage increases with increasing of the pressure difference ;without considering the temperature rise ,the rota-tional speed shows no significant influence on leakage ,however ,raising of the rotational speed improves seal-ing performance .