摘要: |
超速试验器是航空发动机涡轮或压气机轮盘进行超转、破裂试验的重要设备,用以测试轮盘在一定转速下的变形量和爆裂等情况。柔性轴系作为超速试验器的关键部件,在试验过程中的受力情况较为复杂,本文通过运用ANSYS Workbench软件并结合某型发动机第五级整体叶盘的破裂试验,对BI3 CENTRIO70轴系进行强度校核,并研究了不平衡力对轴系强度、径向位移的影响规律。分析表明,轴系(带缺口)在第五级整体叶盘试验转子破裂转速条件下,不会在盘变形所引起的不平衡力作用下断裂,其强度满足试验要求;当试验件破裂瞬间产生的不平衡力F≥356N时,轴系(带缺口)会触碰限位轴承并在其剪切应力集中区域剪切断裂。试验应用结果表明,轴系(带缺口)的断裂区域与有限元分析结果相吻合。 |
关键词: 超速试验器;柔性轴系;破裂试验;强度校核;不平衡力 |
基金项目: |
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The Strength Check and Test Application of BI3 CENTRIO70 Shafting |
Zhang Xiaofang Gao Xingwei Zhang Hui Jiao Junjun Chen Pufei
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Shanxi Shanhang Environmental Test Co., Ltd., Xi’an 710299
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Abstract: |
Overspeed tester is an important equipment for overspeed and burst test for aeroengine disk, which is used to test the deformation and bursting of the disk at a certain speed. As a key component of the overspeed tester, the flexible shafting beared complex forces during the test. The strength of BI3 CENTRIO70 shafting have been checked by using ANSYS Workbench software and combining with the fracture test of the fifth integral disk. On this basis, influence of the unbalance force on the strength and radial displacement of the shafting have been studied. The analysis shows that the shafting (with notch) will not break under the unbalance force caused by disk deformation under the condition of breaking speed of the test piece, and its strength meets the test requirements. When the unbalanced force F≥356N, the shafting (with notch) will touch the limit bearing and shear fracture in its shear stress concentration area. The experimental application results show that the fracture area of shafting (with notch) is consistent with the analysis results. |
Key words: overspeed tester;flexible shafting;burst test;strength check;unbalanced force |