轴承腔壁面油膜厚度超声测量实验研究

推进技术 ›› 2014, Vol. 35 ›› Issue (8): 1110-1115.

轴承腔壁面油膜厚度超声测量实验研究

钟　冲,刘振侠,胡剑平,吕亚国,郝毓雅

西北工业大学动力与能源学院,陕西西安 710072;西北工业大学动力与能源学院,陕西西安 710072;西北工业大学动力与能源学院,陕西西安 710072;西北工业大学动力与能源学院,陕西西安 710072;西北工业大学动力与能源学院,陕西西安 710072

发布日期:2021-08-15
作者简介:钟　冲(1989—),男,硕士生,研究领域为航空发动机滑油系统。

Experimental Study of Ultrasonic Measurement of Oil Film Thickness in Bearing Chamber Wall

College of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;College of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;College of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;College of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;College of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China

Published:2021-08-15

摘要/Abstract

摘要： 针对轴承腔壁面油膜厚度难测的问题,根据脉冲反射法的基本原理,建立了用于测量轴承腔内壁面油膜厚度的超声波测量系统。测量系统主要包括硬件系统和软件系统两大部分,硬件系统主要由数据采集卡、探头、延迟块和相应的电缆等组成；软件系统功能主要有测量参数的设置、测量波形的实时显示、后处理等功能。然后,用所开发的测量系统测量静态条件下八种不同厚度的油膜,并将实验结果与计算值进行对比,第八种油膜厚度下相对误差为6.9%,其余七种情况油膜厚度的相对误差均在5%以下,满足工程实践要求。最后,进行油膜厚度动态测量实验,获得相同流量、不同转速下轴承腔壁面的油膜厚度,经过动态测量的信号品质分析和油膜厚度变化规律分析,该测量系统能在较高精度的要求下完成轴承腔壁面油膜厚度的测量。

关键词: 油膜厚度；超声测量系统；静态测量；动态测量

Abstract: It is hard to measure the oil film thickness in aero-engine bearing chamber. According to the basic principle of the pulse reflection method,software and hardware of an ultrasonic measurement system for measuring the oil film thickness in bearing chamber,are established. The hardware system mainly consists of signal acquisition card,probe,delay block and the corresponding cables. Functions as setting of measurement parameter,real-time display of measurement waveforms,post-processing and so on are included in measurement software. Then ultrasonic measurement system is applied on the eight kinds of oil film thicknesses at static conditions. Comparison between experimental data with calculated values shows that the maximum error is less than 5% at the former seven conditions except the eighth measurement error being 6.9%,meeting the actual requirements. Finally,dynamic film thickness of the wall is measured with this measurement system. Signal quality of the dynamic measurement is analyzed. And also,analysis among different oil film thickness with the same oil flow and different rotation rate is conducted. It is concluded that this measurement system can measure the oil film thickness on bearing chamber wall in relative high accuracy.

Key words: Oil film thickness；Ultrasonic measurement system；Static measurement；Dynamic measurement

钟　冲,刘振侠,胡剑平,吕亚国,郝毓雅. 轴承腔壁面油膜厚度超声测量实验研究[J]. 推进技术, 2014, 35(8): 1110-1115.

ZHONG Chong,LIU Zhen-xia,HU Jian-ping,LV Ya-guo,HAO Yu-ya. Experimental Study of Ultrasonic Measurement of Oil Film Thickness in Bearing Chamber Wall[J]. Journal of Propulsion Technology, 2014, 35(8): 1110-1115.

参考文献

[1] Wittig S,Glahn A.Influence of High Rotational Speeds on Heat Transfer and Oil Film Thickness in Aero Engine Bearing Chambers[J].Journal of Engineering for Gas Turbine and Power,1993,116: 395-401.
[2] Glahn A,Wittig S.Two-Phase Air/Oil Flow in Aero-Engine Bearing Chambers: Characterization of Oil Film Flows[J].Transactions of the ASME,Journal of Engineering for Gas and Turbines Power,1996,118(7): 578-583.
[3] 林基恕.21世纪航空发动机动力传输系统的展望[J].航空动力学报,2001,16(2): 108-114.
[4] 《航空发动机设计手册》总编委会.航空发动机设计手册第十二分册[M].北京: 航空工业出版社,2002: 429-432.
[5] 林基恕.航空燃气涡轮发动机机械系统设计[M].北京:航空工业出版社,2005:99-101.
[6] Roy R.P,Jain S.A Study of Thin Water Film Flow down an Inclined Plate Without and with Countercurrent Air Flow[J].Experiments in Fluids,1989,7: 318-328.
[7] Wittig S.Heat Transfer Analysis in Rotating Gas Turbine Components: Experimental Techniques and Non-Intrusive Diagnostics[C].Honolulu:The 3rd International Symposium on Transport Phenomena and Dynamics of Rotating Machinery,1990.
[8] Gorse P,Busam S,Dullenkopf K.Influence of Operating Condition and Geometry on the Oil Film Thickness in Aero-Engine Bearing Chambers[J].Journal of Engineering for Gas Turbines and Power,2006,128: 103-110.
[9] 刘亚军,陈国定,王军.低速工况下航空发动机轴承腔壁面油膜运动分析[J].机械科学与技术,2010,29(7): 897-901.
[10] 刘亚军,陈国定,王军.高转速下轴承腔内壁油膜流动建模[J].航空动力学报,2010,25(8):1900-1905.
[11] 李斌.轴承腔内油气两相流动与换热特性研究[D].南京: 南京航空航天大学,2010.
[12] 李茂山,超声测距原理及实践技术[J].实用测试技术,1994(1):12-20.
[13] 郝毓雅,孙嘉琪,刘振侠,等.轴承腔壁面液膜厚度测量系统的设计与实现[J].航空计算技术,2012,42(6):121-124.
[14] 胡建恺,张谦琳.超声检测原理和方法[M].安徽:中国科学技术大学出版社,1993.
[15] 西拉德 J.超声检测新技术[M].北京:科学出版社,1991.
[16] Farral M,Simmons K,Hibberd S.A Numerical Model for Oil Film Flow in an Aero-Engine Bearing Chamber and Comparison Experimental Data[J].Journal of Engineering for Gas Turbines and Power,2006,128(1): 111-117.
[17] Farral M,Hibberd S,Simmons K.Computational Modeling of Two Phase Air/Oil Flow within and Aero-Engine Bearing Chambers[C].Boston: Proceedings of ASME FEDSM,2000.(编辑:史亚红)收稿日期:2013-09-07；修订日期:2013-10-09。作者简介:钟冲(1989—),男,硕士生,研究领域为航空发动机滑油系统。E-mail:zhongchong24@mail.nwpu.edu.cn