刷式封严磨损特性及其对泄漏影响的试验研究

推进技术 ›› 2017, Vol. 38 ›› Issue (11): 2597-2605.

刷式封严磨损特性及其对泄漏影响的试验研究

杜春华¹,吉洪湖¹,胡娅萍¹,罗健²,马丹¹,汤丽萍²,廖凯²

南京航空航天大学能源与动力学院，江苏南京 210016,南京航空航天大学能源与动力学院，江苏南京 210016,南京航空航天大学能源与动力学院，江苏南京 210016,中航商用航空发动机有限责任公司，上海 200241,南京航空航天大学能源与动力学院，江苏南京 210016,中航商用航空发动机有限责任公司，上海 200241,中航商用航空发动机有限责任公司，上海 200241

发布日期:2021-08-15
作者简介:杜春华，男，博士生，研究领域为封严技术。
基金资助:
国家自然科学基金(51106072)。

Experimental Investigation on Wearing Characteristics and Effects on Leakage of Brush Seal

College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China,College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China,College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China,AECC Commercial Aircraft Engine CO.，LTD.，Shanghai 200241，China,College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China,AECC Commercial Aircraft Engine CO.，LTD.，Shanghai 200241，China and AECC Commercial Aircraft Engine CO.，LTD.，Shanghai 200241，China

Published:2021-08-15

摘要/Abstract

摘要： 为了获得刷式封严磨损特性及其对泄漏影响，对间隙、过渡、过盈3种配合状态的低前挡板型小尺寸刷式封严进行了试验研究，试验测量了磨损量、泄漏量和转子轴心轨迹等。根据测量结果对各配合刷式封严的磨损特性和磨损对泄漏影响进行了研究。分析结果显示，在磨损特性方面:间隙配合状态下，磨损是局部磨损；过盈配合状态下，磨损发生在整个试验阶段，在试验初始阶段磨损较严重，且磨损较为均匀地发生在整个圆周；过渡配合的磨损发生在整个圆周上，且其磨损不均匀。在磨损对泄漏影响方面:间隙配合状态下，试验初始阶段小压差下磨损对泄漏的影响不明显，在中等压差0.2～0.3MPa时较为明显；过渡配合，磨损对泄漏的影响在小压差和中等压差下较为明显，大压差下不明显；过盈配合下，磨损对泄漏的影响发生在整个试验阶段且磨损对泄漏的影响随磨损量变化的减小而逐渐减小，试验的初始阶段磨损对泄漏的影响最为明显；试验的初始阶段，过盈配合时磨损对泄漏影响最大，过盈配合时次之，间隙配合时最小。

关键词: 刷式封严；磨损特性；转子轴心轨迹；磨损量；泄漏量

Abstract: In order to get wearing characteristics and effects on leakage of brush seal，experimental investigation on small size of brush seal at clearance，transition and interference fit was made. Experiment tested the wear，the leakage of brush seal and the rotor’s axis locus. The wearing characteristics and effects on leakage of wear were analyzed according to the test results. The results show conclusion of wearing characteristics as follows: the wear is concentrated wear when brush seal at clearance fit. The wear appears in whole test stage and severe wear appear at the initial stage of test and uniformly appears on whole circumference of brush seal when brush seal at interference fit. The wear appears on whole circumference of brush seal and is non-uniform when brush seal at transition fit. The effects on leakage of wear are not obvious at small pressure drop of initial stage of test and are most obvious at middle pressure drop which is 0.2～0.3MPa when brush seal at clearance fit. The effects on leakage of wear are obvious at small and middle pressure drop and are not obvious at high pressure drop when brush seal at transition fit. The effects on leakage of wear appear in whole test stage and become smaller with reducing of variation of wear and appear at initial stage of test when brush seal at interference fit. The wear of brush seal has the greatest effect on leakage when brush seal at interference fit，and middle effect on leakage when at transition fit，and the smallest effect on leakage when at clearance fit at initial stage of test.

Key words: Brush seal；Wearing characteristics；Rotor’s axis locus；Wear；Leakage

杜春华,吉洪湖,胡娅萍,罗健,马丹,汤丽萍,廖凯. 刷式封严磨损特性及其对泄漏影响的试验研究[J]. 推进技术, 2017, 38(11): 2597-2605.

DU Chun-hua¹,JI Hong-hu¹,HU Ya-ping¹,LUO Jian²,MA Dan¹,TANG Li-ping²,LIAO Kai². Experimental Investigation on Wearing Characteristics and Effects on Leakage of Brush Seal[J]. Journal of Propulsion Technology, 2017, 38(11): 2597-2605.

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