共查询到10条相似文献,搜索用时 250 毫秒
1.
某高压涡轮整体叶盘破裂转速计算方法及试验验证 总被引:2,自引:0,他引:2
轮盘的一个重要设计准则是防止其破裂。本文介绍了某高压涡轮整体叶盘破裂转速的计算方法和试验验证。根据试验结果对整体叶盘破裂转速的计算方法进行了验证,反推并验证了该高压涡轮整体叶盘的材料利用系数。该研究成果可供工程设计人员参考。 相似文献
2.
3.
To reasonably implement the reliability analysis and describe the significance of influencing parameters for the multi-failure modes of turbine blisk, advanced multiple response surface method(AMRSM) was proposed for multi-failure mode sensitivity analysis for reliability. The mathematical model of AMRSM was established and the basic principle of multi-failure mode sensitivity analysis for reliability with AMRSM was given. The important parameters of turbine blisk failures are obtained by the multi-failure mode sensitivity analysis of turbine blisk. Through the reliability sensitivity analyses of multiple failure modes(deformation, stress and strain) with the proposed method considering fluid–thermal–solid interaction, it is shown that the comprehensive reliability of turbine blisk is 0.9931 when the allowable deformation, stress and strain are3.7*10~(-3)m, 1.0023*10~9 Pa and 1.05*10~(-2)m/m, respectively; the main impact factors of turbine blisk failure are gas velocity, gas temperature and rotational speed. As demonstrated in the comparison of methods(Monte Carlo(MC) method, traditional response surface method(RSM), multiple response surface method(MRSM) and AMRSM), the proposed AMRSM improves computational efficiency with acceptable computational accuracy. The efforts of this study provide the AMRSM with high precision and efficiency for multi-failure mode reliability analysis, and offer a useful insight for the reliability optimization design of multi-failure mode structure. 相似文献
4.
为减小航空发动机涡轮盘应力,减轻质量,提高发动机推重比,介绍了3种先进涡轮盘,即纤维增强涡轮盘、双辐板涡轮盘和整体涡轮叶盘的结构特点和工艺难点,提出其未来的研制设想;应用有限元分析软件对传统涡轮盘与3种先进涡轮盘进行了强度对比分析和质量计算.结果表明:3种先进涡轮盘在强度和质量方面较传统涡轮盘具有优势,突破相应的关键技术后,可应用于未来高推重比发动机中. 相似文献
5.
A turbine blisk, which combines blades and a disk together, is one of the most important components of an aero engine. In the process of blisk electrochemical machining (ECM), the sheet cathode, which is usually used as a tool electrode, has a complicated structure. In addition to that, the channel between the adjacent blades is narrow and twisted, so interference is apt to happen when the sheet cathode feeds into the channel. Therefore, it is important to choose suitable trajectory control strategy. In this paper, a new trajectory control strategy of the sheet cathode is presented and corresponding simulation analysis is conducted on the basis of an actual blisk model. The simulation results demonstrate that the sheet cathode can feed into the channel by a spatial line trajectory without interference. Moreover, the verification experiments are carried out according to the simulation. The experimental results show that the cathode can move into the channel without interference. It is verified that the new trajectory control strategy is correct and can be used in the blisk ECM process successfully. 相似文献
6.
自主发展了径流及斜流涡轮的准三维流线曲率法通流设计程序,应用该程序给出了一项500 N推力级微型涡喷发动机斜流涡轮的气动设计和叶片造型.通过计算流体力学检验和整体叶轮强度检验,该微型斜流涡轮超过了预定的设计指标.为实现径流涡轮和斜流涡轮设计反问题的统一,流线曲率法的S2,m流面准径向平衡方程是沿流线方向m和流线的准法线方向口写出,该系统也可用于轴流涡轮的设计.采用了在所有计算站上的"全可控涡法"进行气动设计. 相似文献
7.
整体叶盘有良好的结构完整性、轻质化、装配环节少、装配精度高等优点,已被广泛应用于航空发动机中。根据整体叶盘的切削加工特征,将其简化为整体叶盘基准件,从数控编程和加工技术两方面实现整体叶盘的高质量加工。首先,利用Hyper MILL软件对整体叶盘基准件进行数控编程,优化获得理想的刀具路径,保证高效高质量的零件加工。然后,利用DMU-70V五轴加工中心对钛合金TC4整体叶盘基准件进行切削加工,在整体叶盘基准件叶片和流道几何特征的精加工时,选用不同型号的立铣刀,并监测加工过程中的切削力。最后,对加工后叶片和流道加工表面形貌进行测试分析,并结合切削力对比分析国产刀具和进口刀具对钛合金整体叶盘的切削加工性能。 相似文献
8.
9.
10.
整机动平衡可大幅提高燃气涡轮发动机动平衡效率,但由于全转速范围内整机系统动力特性复杂,且结构的特殊性仅能够在机匣外表面测振,传统动平衡方法难以实现整机动平衡。为此,考虑全转速区间整机系统结构振动特性及分布式不平衡量的影响,通过仿真或试验获得全转速范围内各测点振动响应与各叶盘不平衡量间的响应系数矩阵,建立等效不平衡量逆推方程组。依据不平衡位置-转速-测点振动间的敏感性关系对全转速系数矩阵进行降维重构,获得优选配平位置、测点及转速的重构方程组,求得转子配平位置的等效不平衡量。典型双转子燃气涡轮发动机整机系统数值仿真结果验证了该方法的有效性。研究结果对实现燃气涡轮发动机整机动平衡具有一定的参考应用价值。 相似文献