消隙齿轮降低柴油机怠速噪声的应用研究

柴油机噪声影响着农业机械操作者的身心健康,该文为了解决某型柴油机在怠速工况下的异响噪声问题,采用仿真与试验相结合的方法进行研究。首先,通过声强和声压测试确定了噪声的主要产生部位;然后,基于Hypermesh和Abaqus软件建立了曲轴及整机零部件的有限元模型,并通过模态试验验证了有限元模型的准确性,基于Excite软件建立了配气正时传动系统和整机的多体动力学模型,发动机整机振动计算时考虑了缸内燃气压力、正时系统及配气机构全阀系激励和活塞敲击激励。多体动力学仿真结果表明：齿轮的反向敲击出现时,齿轮工作面的接触力消失,进排气齿轮在背隙侧发生接触产生冲击力,进而造成发动机在怠速时产生＂哒哒＂的异响噪...

Full description

Saved in:
Bibliographic Details
Published in农业工程学报 Vol. 33; no. 1; pp. 63 - 69
Main Author 李民 陈烨龙 庞建武 杜慧勇 徐斌
Format Journal Article
LanguageChinese
Published 河南科技大学车辆与交通工程学院,洛阳,471003%广西玉柴机器股份有限公司,玉林,537005 2017
Subjects
噪声
怠速工况
振动
柴油机
消隙齿轮
齿轮
消隙齿轮
振动
怠速工况
idle condition
柴油机
anti-backlash gear
noise
diesel engine
齿轮
噪声
vibrations
gears
Online AccessGet full text
ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2017.01.008

Cover

More Information
Summary:柴油机噪声影响着农业机械操作者的身心健康,该文为了解决某型柴油机在怠速工况下的异响噪声问题,采用仿真与试验相结合的方法进行研究。首先,通过声强和声压测试确定了噪声的主要产生部位;然后,基于Hypermesh和Abaqus软件建立了曲轴及整机零部件的有限元模型,并通过模态试验验证了有限元模型的准确性,基于Excite软件建立了配气正时传动系统和整机的多体动力学模型,发动机整机振动计算时考虑了缸内燃气压力、正时系统及配气机构全阀系激励和活塞敲击激励。多体动力学仿真结果表明：齿轮的反向敲击出现时,齿轮工作面的接触力消失,进排气齿轮在背隙侧发生接触产生冲击力,进而造成发动机在怠速时产生＂哒哒＂的异响噪声;整机振动仿真结果表明：使用消隙齿轮可以消除进/排气凸轮轴齿轮的反向敲击,在1 000~2 500 Hz范围内,使得齿轮室盖和缸盖罩的振动速度级降低了7 d B左右。最后在半消声室的发动机台架上,对有无消隙齿轮的柴油机进行了振动加速度、噪声和声品质的对比试验,试验表明：怠速工况下,使用消隙齿轮后,前端发出的＂哒哒＂异响噪声消失,齿轮室盖振动降幅很大,前端1 m噪声声压级降低了5~9 d B（A）,声品质也有了明显改善。因此,当内燃机其它齿轮传动部位出现齿轮反向敲击声时,可考虑使用消隙齿轮予以解决。
Bibliography:11-2047/S
diesel engine; vibrations; gears; idle condition; anti-backlash gear; noise
Dieselengine noise has a bad influence on physical and mental health of agricultural machinery operators. In this paper, we aimed at eliminating the abnormal rattling noise of a diesel engine running at idle speed condition by simulation and experiment. Firstly, on engine test bench in a semi-anechoic room, the rattling noise was identified through sound intensity and sound pressure measurement, the nine point sound pressure results showed that the rattling noise was more obvious in front of the engine, and the sound intensity of the engine front part showed that the main part of rattling noise was generated from the timing gear cover in front of intake camshaft and exhaust camshaft. In order to eliminating the abnormal rattling noise, some improvements were also attempted, such as using acoustic shield over intake camshaft and exhaust camshaft, improving the accuracy of timing gears through gear grinding, optimizing the param
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2017.01.008