共查询到19条相似文献,搜索用时 156 毫秒
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涡旋体是涡旋压缩机重要的零件之一。为了研究其振动特性,对其进行模态分析是十分必要的。首先,以圆的渐开线作为涡旋体的涡旋曲线,利用APDL建立了涡旋体的的三维模型,经过网格划分,生成有限元模型;然后利用ANSYS模态分析模块,采用BLOCK LANCZOS方法进行模态计算;最后得出其前6阶固有频率和振型,对涡旋体的设计、制造及维修有理论指导意义。 相似文献
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以涡旋压缩机转子和壳体为研究对象,基于涡旋压缩机的总体结构和工作原理,通过对涡旋压缩机转子受力状态分析,建立了涡旋压缩机转子的动力学模型.利用有限元方法和多体动力学理论,对涡旋压缩机转子和壳体进行了有限元模态分析,获得了涡旋压缩机转子和壳体的固有频率和振型等模态特性参数.在涡旋压缩机主轴系拓扑构型的基础上,分别建立了主轴系的多刚体模型和多柔体模型.通过对曲轴系多体动力学分析,得到了气体力载荷和在柔性体条件下壳体承受主副轴承载荷等,分析了壳体在载荷作用下的动力学响应问题.结果表明,主轴和壳体主轴承之间的相互作用关系只有多柔体动力学模型能给出合理且相对准确的分析计算结果.通过壳体动态响应分析,不仅可以掌握壳体的位移与应力分布情况,而且还获得了壳体某一节点在运行过程中的位移时间历程,为主轴与壳体的结构设计提供理论依据. 相似文献
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变速箱作为汽车传动系统中重要组成部分,为汽车在不同工况下行驶时提供不同的转速和扭矩,保证汽车的正常行驶。本文以变速箱箱体为对象,应用Catia建立了箱体三维实体模型,利用HyperMesh建立了箱体有限元模型,在Romax Designer中分别完成了箱体的自由模态和约束模态分析。通过分析模态振型特征,直观的分析变速箱的动态特性,发现其刚度薄弱环节,为变速箱的结构设计提供参考依据。 相似文献
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无油润滑涡旋压缩机齿端面密封的研究 总被引:7,自引:2,他引:7
涡旋压缩机在工作过程中动、静涡盘之间间隙存在泄漏损失,它是影响无油润滑涡旋压缩机工作性能的重要因素。在涡旋齿端面加由自润滑材料制成的密封条是实现无油润滑的一项关键技术。本文从材料和结构两方面阐述了密封条的基本特点,介绍了密封条的两种结构模型,说明了各自的工作原理,并对两种模型进行了受力分析,得出了密封条正常工作应满足的条件及选用两种结构模型应注意的问题。结果表明:密封条不但可以阻止通过轴向间隙的泄漏,而且降低了涡旋齿与涡盘底部摩擦功率损失。 相似文献
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Mu-Seong Chang Jong-Won Park Young-Min Choi Tae-Kook Park Byung-Oh Choi Chang-Joo Shin 《Journal of Mechanical Science and Technology》2016,30(10):4459-4463
This study presents a reliability evaluation method of the scroll compressor for system air conditioner. After conducting reliability target determination and failure analysis (failure mode and effect analysis) on the scroll compressor, the significance of the stress factors affecting wear (main failure mode) is evaluated using design of experiments. Specifically, wear is estimated under various test conditions using analysis results. The lifetime of the scroll compressor is estimated using the data of zero-failure accelerated life test performed under various test conditions. The result satisfies the warranty lifetime of the scroll compressor. Finally, the procedure of reliability determination test for the scroll compressor is briefly proposed. 相似文献
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介绍了电涡流法测量位移的基本原理和性能,设计了静态校正系统,对电涡流位移传感器进行了静态特性测试,并对不同测试材料的输出特性进行了试验对比。用设计的动态测试平台模拟涡旋压缩机中形成轴向间隙的动静盘间的实际运动情况,利用基于虚拟仪器技术的数据采集系统记录数据波形。试验结果表明,电涡流位移传感器静态和动态性能好、灵敏度高、输出信号强,能满足涡旋压缩机轴向间隙小位移量的测量要求,输出波形信号频率能精确反映压缩机的转速变化情况。指出了传感器用于涡旋压缩机实际测量时的安装要点。 相似文献
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High-cycle fatigue (HCF) has been identified as one of the primary causes of gas turbine engine failure. The modal characteristics and endurance strength of a 5 MW gas turbine engine blade developed by Doosan Heavy Industries & Construction Co., Ltd. in HCF fracture were verified through analysis and tests to determine the reliability of the compressor blade. A compressor blade design procedure that considers HCF life was performed in the following order: airfoil and blade profile design, modal analysis, stress distribution test, stress endurance limit test, and fatigue life verification. This study analyzed the Campbell diagram and estimated resonance risk on the basis of the natural frequency analysis and modal test of the compressor blade to guarantee safe and operational reliability. In addition, the maximum stress point of the compressor blade was determined through stress distribution analysis and test. The bonding point of the strain gage was determined by using fatigue test. Stress endurance limit test was performed based on the results of these tests. This research compared and verified the modal characteristics and endurance strengths of the compressor blades to prevent HCF fracture, which is among the major causes of gas turbine engine damage. A fatigue life design procedure of compressor blades was established. The 5 MW class gas turbine compressor blade is well designed in terms of resonance stability and fatigue endurance limit. 相似文献
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涡旋压缩机理论机构模型 总被引:12,自引:0,他引:12
采用曲柄和双滑块机构作为涡旋压缩机的理论机构模型,借助此模型从机构学的基本原理出发对涡旋压缩机的工作原理进行了分析,揭示了涡旋机构成立和实现正确运动的条件和普遍规律。 相似文献