CAJ | 학술논문

为了研究流固耦合场对罗茨机械增压器转子强度的影响，文章以Fluent-Ansys为平台，对罗茨机械增压器内部流动进行三维数值模拟，将流场的计算结果作为初始边界条件加载，采用单向流固耦合方法对转子进行仿真计算，获得了不同工况下转子的等效应力及变形情况，分析了转子应力和变形影响因素。结果表明：离心力对转子强度影响较小，转子的应力和变形主要由温度载荷引起，最大等效应力出现在轴承与轴肩连接部位，最大总变形发生在转子排气口的叶轮端面位置；额定工况时，转子最大等效应力为287.22 M Pa ，远小于材料的疲劳极限，最大变形为0.0729 mm ，对转子啮合间隙影响较大。
위료연구류고우합장대라자궤계증압기전자강도적영향，문장이Fluent-Ansys위평태，대라자궤계증압기내부류동진행삼유수치모의，장류장적계산결과작위초시변계조건가재，채용단향류고우합방법대전자진행방진계산，획득료불동공황하전자적등효응력급변형정황，분석료전자응력화변형영향인소。결과표명：리심력대전자강도영향교소，전자적응력화변형주요유온도재하인기，최대등효응력출현재축승여축견련접부위，최대총변형발생재전자배기구적협륜단면위치；액정공황시，전자최대등효응력위287.22 M Pa ，원소우재료적피로겁한，최대변형위0.0729 mm ，대전자교합간극영향교대。
In order to study the impact of fluid-structure coupling field on the strength of the Roots me-chanical supercharger rotors ,the three-dimensional flow field in Roots mechanical supercharger was numerically simulated based on Fluent-Ansys .The calculation results of the flow field were loaded as the initial boundary conditions and the rotors were simulated by the one-way fluid-structure interaction method .The equivalent stress and deformation values under different operating conditions were ob-tained ,and the factors affecting the stress and deformation of the rotors were analyzed .The research results show that the centrifugal force has little effect on the strength of the rotors ,and the stress and deformation of rotors are mainly caused by the thermal load .The maximum equivalent stress value oc-curs at the bearing and the shaft shoulder joints and the maximum total deformation occurs at the im-peller end face of the exhaust port .Under rated operating conditions ,the maximum equivalent stress value is 287.22 M Pa ,w hich is far less than the fatigue limit of the material .T he maximum deforma-tion is 0.072 9 mm ,w hich has great effect on the meshing clearance of the rotors .