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ANSYS在多列往复压缩机轴系扭振分析中的应用 总被引:2,自引:1,他引:1
随着石油化工流程规模的不断扩大,往复压缩机向超大型多列方向发展。压缩机列数的增加,导致轴系扭转固有频率降低,轴系出现扭转振动的可能性变大;经验表明,研制6列以上大型往复压缩机,必须进行轴系扭振分析。有限元技术的发展,为压缩机轴系的动力分析提供了新的解决方案。以6M50型往复压缩机为分析对象,利用ANSYS软件对轴系进行了静力分析、模态分析和动态响应分析。结果表明,该分析技术可以全面系统地分析轴系各项动力特性,可以直观准确地获得轴系不同部位、不同时刻的应力分布,为大型往复压缩机轴系设计提供可靠的理论依据。 相似文献
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双列立式微型往复空压机是目前新能源商用车气源的主流技术发展方向。在某机型的研发中发现,样机存在噪声、振动超标的问题,其中曲轴箱附近的噪声最大,峰值频率在1250Hz,为基频的整数倍。由于轴系的振动是曲轴箱振动和噪声的重要来源,有必要对该机型采用的组合式曲轴进行研究,判断其是否发生扭转共振。采用常惯量模型处理轴系往复质量产生的影响,考虑了轴系的装配体接触问题,建立了轴系扭振的计算分析模型。在考虑曲轴的转速和在曲轴箱中约束的基础之上,对轴系进行了静力分析,并以此为边界条件,提取了轴系的固有频率及模态振型。最后对使曲轴发生扭转振动的激励——切向力进行了谐波分析,并结合模态参数进一步判断得出:该压缩机的轴系在工作条件下不会发生扭转共振。 相似文献
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介绍小功率往复压缩机组在试机中,压缩机轴系产生异响进行分析,提出可行、有效的分析方法和解决方案,消除压缩机组轴系异响,满足压缩机组可靠、稳定运行。 相似文献
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以某大型4列往复压缩机曲轴系为研究对象,用Ansys有限元建模的方式,对曲轴进行模态分析和谐响应分析。分析发现原曲轴系存在扭转振动隐患,通过调整设计参数,改善了曲轴系扭振状况,改进了曲轴动力学特性。 相似文献
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用微机版本AMTPOS大型有限元分析软件包对T7220A立式精镗床进行了动态分析,与试验数据进行对比,找出了整机的主要薄弱环节。最后,拟定了三种修改方案,最终得出了最佳改进方案,从而提高了机床的动态性能。 相似文献
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对荧光分析仪器的发展历史作了简介。对荧光分析仪器的应用、开发情况和市场特点作了分析。简单讨论了目前国内外荧光分析仪器及技术的现状和发展趋势。 相似文献
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五坐标龙门加工中心动特性分析与振动控制 总被引:1,自引:2,他引:1
通过对机床整机有限元模型的动力学分析。找出对整机动态性能影响最大的主振型,并以这些振型的模态参数进行抑制振动的调谐阻尼器的设计。通过分析可以看出,在原结构模型上安装该调谐阻尼器后。整机的动态性能得到了进一步的提高。 相似文献
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CAE技术在空间相机光机结构设计中发挥着不可替代的作用,用有限元分析法对空间CCD相机的镜筒进行了模态分析和加速度下非线性模态分析,分析结果表明可以用静态下的模态分析代替非线性下的模态分析模拟实际情况。最后通过正弦响应分析,验证了该结构有很好的刚度,能够保证相机的稳定性和可靠性。 相似文献
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The mechanics of the deformations and the destruction of the asperities of rough surfaces has been considered, taking into account the mutual influence of the elastic constants of the materials participating in the friction couple. The case when the destruction is taking place inside of the contact layer is assumed to have the highest probability. The tight bear of the peaks of one body against the valleys of the other and the adhesion phenomena are leading to a mutual deformation of the prevailing number of asperities of both surfaces. This allows one to consider the contact layer as a composite body consisting of two solid phases and voids. It has been shown that such an approach does not exclude the possibility of shearing off only the soft material of the couple. For the asperities subject to bending deformations, the mutual influence of the elastic constants is conditioned by the mutual angle of rotation of the cross sections. In this case consideration of the tangential stresses in the destruction of the short bars (asperities) is essential. 相似文献
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An on-line visual ferrograph (OLVF) characterized by direct reading and on-line analysis was developed based on magnetic deposition and image analysis. A digital sensor was integrated with a CMOS image sensor to obtain images of deposited wear debris under illumination conditions. An electromagnetic instrument was designed to deposit the wear debris flowing through an oil flow channel. The oil flow channel, fixed on the electromagnet, was arranged parallel to the magnetic flux in the air gap between two electromagnet poles. The deposition effect on wear debris was analyzed theoretically. The result shows that the wear debris in different sizes can be deposited in the same zone by controlling the oil flow rate and magnet field intensity. Corresponding application software for image sampling and processing was developed. An index of relative wear debris concentration, IPCA (Index of Particle Coverage Area), is given as an output in addition to wear debris images. Finally, two kinds of experiments were specified to assess the effect and validity of the OLVF. The results show that the OLVF has effective deposition and identification for both relatively large and small wear debris with rational control parameters. The validity examinations with the commercial particle quantifier (PQ) and direct reading ferrograph (DR) show that the OLVF has an approaching trend to the reference instruments in both heavily and lightly contaminated oil. 相似文献