Research on internal load of the interface and quality control methods for rotor configuration state
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摘要:
界面连接转子系统结构状态参数之间的耦合关系对整机振动有重要影响，综合考虑了构件质心偏移和惯性主轴偏斜沿轴向的分布，提出了转子结构状态品质控制的本质是优化和控制“三轴”的一致性，减小连接界面旋转惯性内载荷。建立了基于转子构件可测几何参数和力学参数的虚拟装配预测模型，实现了转子同轴度、不平衡量及界面内载荷的协同优化。形成了涵盖制造-装配-分解全流程的闭环控制方案，工程应用表明：发动机试车一次合格率提升15%以上，大部分关键参数波动幅度降低30%以上。
Abstract:The coupling relationship between the configuration state parameters of the interface-connected rotor system has an important impact on the aero-engine vibration. Taking into account the distribution of component center of mass deviation and skewness of the principal axis of inertial along the axial direction, the essence of rotor configuration state quality control was presented to optimize and control the consistency of the “three axes”. So the rotational inertia internal load of the interface was reduced. A virtual assembly prediction model based on measurable geometric and mechanical parameters of rotor components was established. The collaborative optimization of rotor coaxiality, unbalance, and internal load of the interface was achieved. A closed-loop control scheme covering the entire process of manufacturing-assembly-disassembly was developed. Engineering applications demonstrated that the engine test first-pass qualification rate increased by over 15%, while the fluctuation amplitude of the majority of key parameters was reduced by more than 30%.
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图 3 装配、制造过程对转子品质的影响
Figure 3. Impact of assembly and manufacturing processes on rotor quality
图 4 形心轴偏斜引起转子附加旋转惯性载荷
Figure 4. Additional rotational inertia load on the rotor caused by the skewness of the centroid axis
图 7 转子任一连接界面旋转惯性内载荷分析
Figure 7. Analysis of rotational inertia internal load on any connection interface of the rotor
图 11 转子同轴度实测值与计算值矢量偏差分布情况
Figure 11. Distribution of vector deviation between measured and calculated rotor coaxiality values
图 12 转子同轴度、垂直度预测结果
Figure 12. Prediction results of rotor coaxiality and perpendicularity
图 14 转子初始不平衡量优化效果对比
Figure 14. Comparison of optimization effects for initial unbalance of rotors
图 15 不同结构特征的构件及其同轴度控制
Figure 15. Components with different structural features and their coaxiality control
图 16 涡轮前封严盘初始与最终不平衡量对比
Figure 16. Comparison of initial and final unbalance of turbine front sealing disc
图 17 压气机转子质心偏心分布
Figure 17. Distribution of eccentricity of compressor rotor center of mass
图 23 转子各连接界面螺母松脱力矩分布
Figure 23. Distribution of loosening torque of nuts at each connection interface of the rotor
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