19 October 2016 Application of chromatic confocal displacement sensor in measurement of tip clearance
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Proceedings Volume 10155, Optical Measurement Technology and Instrumentation; 101551S (2016) https://doi.org/10.1117/12.2246724
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
In the field of aeronautics, the tip clearance of rotor exerts a crucial influence on the performance of the aero engine. As defined as the radial distance between the top of the blade and the inner wall of the casing, the tip clearance of too large or small size will adversely affect the normal running of the engine. In order to realize accurate measurement of the tip clearance in a simple way, a non-contact measuring method by the chromatic confocal displacement sensor is proposed in the paper. The sensor possesses the advantages such as small volume, good signal-to-noise ratio, high accuracy and response frequency etc., which make it be widely used in engineering and industry. For testing the performance and potential application of the sensor, a simulation testing platform is established. In the platform, a simulation blisk is installed on the air bearing spindle and a chromatic confocal displacement sensor is fixed on the platform to measure the displacement variation of the blade tip, which can be used to characterize the variation of the tip clearance. In the simulation experiments, both of single and continuous measurement of the tip clearance of the 36 blades on the blisk is executed. As the results of experiments show, the chromatic confocal displacement sensor can meet the requirements of measuring task, in which both of high measuring efficiency and accuracy could be achieved. Therefore, the measuring method proposed in the paper can be utilized in the actual assembling sites of the aero engine.
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Chao Bi, Chao Bi, Di Li, Di Li, Jianguo Fang, Jianguo Fang, Bin Zhang, Bin Zhang, } "Application of chromatic confocal displacement sensor in measurement of tip clearance", Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101551S (19 October 2016); doi: 10.1117/12.2246724; https://doi.org/10.1117/12.2246724
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