International Journal of Rotating Machinery最新文献_第3页

Tailored Centrifugal Turbomachinery for Electric Fuel Cell Turbocharger 为电力燃料电池涡轮增压器量身定制的离心涡轮机械

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International Journal of Rotating Machinery Pub Date : 2021-09-27 DOI: 10.1155/2021/3972387

D. Filsinger, G. Kuwata, N. Ikeya

{"title":"Tailored Centrifugal Turbomachinery for Electric Fuel Cell Turbocharger","authors":"D. Filsinger, G. Kuwata, N. Ikeya","doi":"10.1155/2021/3972387","DOIUrl":"https://doi.org/10.1155/2021/3972387","url":null,"abstract":"Hydrogen fuel cell technology is identified as one option for allowing efficient vehicular propulsion with the least environmental impact on the path to a carbon-free society. Since more than 20 years, IHI is providing charging systems for stationary fuel cell applications and since 2004 for mobile fuel cell applications. The power density of fuel cells substantially increases if the system is pressurized. However, contaminants from fuel cell system components like structural materials, lubricants, adhesives, sealants, and hoses have been shown to affect the performance and durability of fuel cells. Therefore, the charging system that increases the pressure and the power density of the stacks inevitably needs to be oil-free. For this reason, gas bearings are applied to support the rotor of a fuel cell turbocharger. It furthermore comprises a turbine, a compressor, and, on the same shaft, an electric motor. The turbine utilizes the exhaust energy of the stack to support the compressor and hence lower the required electric power of the air supply system. The presented paper provides an overview of the fuel cell turbocharger technology. Detailed performance investigations show that a single-stage compressor with turbine is more efficient compared to a two-stage compressor system with intercooler. The turbine can provide more than 30% of the required compressor power. Hence, it substantially increases the system efficiency. It is also shown that a fixed geometry turbine design is appropriate for most applications. The compressor is of a low specific speed type with a vaneless diffuser. It is optimized for operating conditions of fuel cell systems, which typically require pressure ratios in the range of 3.0.","PeriodicalId":46335,"journal":{"name":"International Journal of Rotating Machinery","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47763617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Critical Hydraulic Eccentricity Estimation in Vertical Turbine Pump Impeller to Control Vibration 立式涡轮泵叶轮控制振动的临界水力偏心估计

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International Journal of Rotating Machinery Pub Date : 2021-07-31 DOI: 10.1155/2021/6643282

Ravindra S. Birajdar, A. Keste, S. Gawande

{"title":"Critical Hydraulic Eccentricity Estimation in Vertical Turbine Pump Impeller to Control Vibration","authors":"Ravindra S. Birajdar, A. Keste, S. Gawande","doi":"10.1155/2021/6643282","DOIUrl":"https://doi.org/10.1155/2021/6643282","url":null,"abstract":"In many applications, pumps are tested against standard specifications to define the maximum allowable vibration amplitude limits of a pump. It is essential to identify the causes of vibration and methods to attenuate the same to ensure the safe and satisfactory operation of a pump. Causes of vibration can be classified mainly into mechanical and hydraulic nature. Respective unbalance masses are the two major factors which cause dynamic effects and excitation forces leading to undesirable vibrations. In this paper, the procedure of vibration magnitude measurement of a vertical turbine pump at site and the process of dynamic balancing to measure mechanical unbalance of an impeller are explained. After that, the impact of hydraulic eccentricity on the vibration displacement of a vertical turbine pump has been explained using numerical simulation procedure based on “One-way Fluid Structure Interaction (FSI).” The experimental results from a pump at site are used to compare the numerical results. After the solver validation, the one-way FSI approach is used to find the critical hydraulic eccentricity magnitude of a vertical turbine pump impeller to limit the vibration magnitudes on motor component to less than 100 μm. From the numerical simulations, it is deduced that the critical hydraulic eccentricity should be limited to 400 μm in \u0000 \u0000 X\u0000 \u0000 and \u0000 \u0000 Y\u0000 \u0000 direction. The process can be used as a guideline procedure for limiting the hydraulic unbalance in vertical turbine pumps by limiting the hydraulic eccentricity.","PeriodicalId":46335,"journal":{"name":"International Journal of Rotating Machinery","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44351695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Multisource Fault Signal Separation of Rotating Machinery Based on Wavelet Packet and Fast Independent Component Analysis 基于小波包和快速独立分量分析的旋转机械多源故障信号分离

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International Journal of Rotating Machinery Pub Date : 2021-05-31 DOI: 10.1155/2021/9914724

Feng Miao, R. Zhao, L. Jia, Xianli Wang

{"title":"Multisource Fault Signal Separation of Rotating Machinery Based on Wavelet Packet and Fast Independent Component Analysis","authors":"Feng Miao, R. Zhao, L. Jia, Xianli Wang","doi":"10.1155/2021/9914724","DOIUrl":"https://doi.org/10.1155/2021/9914724","url":null,"abstract":"The vibration signal of rotating machinery compound faults acquired in actual fields has the characteristics of complex noise sources, the strong background noise, and the nonlinearity, causing the traditional blind source separation algorithm not be suitable for the blind separation of rotating machinery coupling fault. According to these problems, an extraction method of multisource fault signals based on wavelet packet analysis (WPA) and fast independent component analysis (FastICA) was proposed. Firstly, according to the characteristic of the vibration signal of rotating machinery, an effective denoising method of wavelet packet based on average threshold is presented and described to reduce the vibration signal noise. In the method, the thresholds of every node of the best wavelet packet basis are acquired and averaged, and then the average value is used as a global threshold to quantize the decomposition coefficient of every node. Secondly, the mixed signals were separated by using the improved FastICA algorithm. Finally, the results of simulations and real rotating machinery vibration signals analysis show that the method can extract the rotating machinery fault characteristics, verifying the effectiveness of the proposed algorithm.","PeriodicalId":46335,"journal":{"name":"International Journal of Rotating Machinery","volume":"140 ","pages":"1-17"},"PeriodicalIF":0.9,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41281929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Research and Development of a Small-Scale Icing Wind Tunnel Test System for Blade Airfoil Icing Characteristics 小型叶片翼型结冰特性风洞试验系统的研制

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International Journal of Rotating Machinery Pub Date : 2021-05-14 DOI: 10.1155/2021/5598859

Lei Shi, F. Feng, Wenfeng Guo, Yan Li

引用次数: 8

Optimization Analysis of Automotive Asymmetric Magnetic Pole Permanent Magnet Motor by Taguchi Method 汽车非对称磁极永磁电机的田口法优化分析

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International Journal of Rotating Machinery Pub Date : 2021-04-16 DOI: 10.1155/2021/6691574

Wenchao Zhang, L. Shi, Kaiwen Liu, Lintao Li, Jianning Jing

{"title":"Optimization Analysis of Automotive Asymmetric Magnetic Pole Permanent Magnet Motor by Taguchi Method","authors":"Wenchao Zhang, L. Shi, Kaiwen Liu, Lintao Li, Jianning Jing","doi":"10.1155/2021/6691574","DOIUrl":"https://doi.org/10.1155/2021/6691574","url":null,"abstract":"In order to improve the air-gap flux density of the permanent magnet synchronous motor and reduce the cogging torque, a novel structure with asymmetric magnetic poles for automobile was proposed. Based on the characteristics of the parallel magnetic circuit, the magnetic flux path diagram is established. And the equivalent magnetic circuit model is established by the equivalent magnetic circuit method. The Taguchi method is used to be a multiobjective optimization algorithm. The total harmonic distortion of the air-gap flux density is the first optimization goal. The second and third optimization goals are the cogging torque and the average of output torque, respectively. And the torque ripple is a constraint condition. The optimized parameter combination is obtained by the Taguchi method. Finite element simulation analysis and prototype test are carried out for the optimized motor structure. The results show that the total harmonic distortion of air-gap flux density is reduced by 36.7% comparing with the initial structure. The cogging torque is reduced by 26.0%. And the average output torque is increased by 4.8%.","PeriodicalId":46335,"journal":{"name":"International Journal of Rotating Machinery","volume":"2021 1","pages":"1-9"},"PeriodicalIF":0.9,"publicationDate":"2021-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48622887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Study of Groove Parameters on the Hydrodynamic Behavior of Spiral-Grooved Thrust Bearing with Gas Lubricant 槽参数对气体润滑螺旋槽推力轴承流体力学性能的影响研究

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International Journal of Rotating Machinery Pub Date : 2021-04-07 DOI: 10.1155/2021/5571765

Xianfei Xia, Yu Chen, Xiuying Wang, Yu Sun

引用次数: 3

Effect of Static Rotor Eccentricity on End Winding Forces and Vibration Wearing 静转子偏心对端部绕组力和振动磨损的影响

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International Journal of Rotating Machinery Pub Date : 2021-03-29 DOI: 10.1155/2021/5554914

Hong-Chun Jiang, Guiji Tang, Yu‐Ling He, Kai Sun, Weijun Li, Lun Cheng

{"title":"Effect of Static Rotor Eccentricity on End Winding Forces and Vibration Wearing","authors":"Hong-Chun Jiang, Guiji Tang, Yu‐Ling He, Kai Sun, Weijun Li, Lun Cheng","doi":"10.1155/2021/5554914","DOIUrl":"https://doi.org/10.1155/2021/5554914","url":null,"abstract":"In order to study the vibration wearing regularity and the strength failure point of stator end windings before and after static rotor eccentricity, the three-dimensional electromagnetic forces and the subsequent mechanical responses are studied in this paper. The electromagnetic force, stress, and deformation on the end winding of the QFSN-600-2YHG turbo-generator are calculated by the finite element method (FEM) through an electromagnetic-structure coupling. The radial vibration characteristics of the winding are verified by experiments. It shows that the vibration wearing in the same layer is more serious than that between two neighboring layers. For different layers, the interphase coils endure a larger wearing risk than the innerphase coils. Inside the same phase, the last coil along the rotating direction has the highest risk of insulation wearing. The occurrence of static rotor eccentricity will significantly increase the electromagnetic forces and the vibration amplitudes on some coils. The end-phase coil which is close to the minimum air-gap point is the most dangerous one due to the lasting overstresses and the intensified deformations.","PeriodicalId":46335,"journal":{"name":"International Journal of Rotating Machinery","volume":"2021 1","pages":"1-14"},"PeriodicalIF":0.9,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46107362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Assessment of Equipment Operation State with Improved Random Forest 基于改进随机森林的设备运行状态评估

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International Journal of Rotating Machinery Pub Date : 2021-03-08 DOI: 10.1155/2021/8813443

Na Yang, Shenghua Liu, Jie Liu, Changjie Li

引用次数: 3

The Air Lubrication Behavior of a Kingsbury Thrust Bearing Demonstration 金斯伯里推力轴承的空气润滑性能演示

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International Journal of Rotating Machinery Pub Date : 2021-02-27 DOI: 10.1155/2021/6690479

Wanjun Xu, Jiangang Yang

引用次数: 1

Validation of the Axial Thrust Estimation Method for Radial Turbomachines 径向叶轮机轴向推力估算方法的验证

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International Journal of Rotating Machinery Pub Date : 2021-02-24 DOI: 10.1155/2021/6669193

Jonna Tiainen, Ahti Jaatinen-Värri, A. Grönman, P. Sallinen, J. Honkatukia, T. Hartikainen

{"title":"Validation of the Axial Thrust Estimation Method for Radial Turbomachines","authors":"Jonna Tiainen, Ahti Jaatinen-Värri, A. Grönman, P. Sallinen, J. Honkatukia, T. Hartikainen","doi":"10.1155/2021/6669193","DOIUrl":"https://doi.org/10.1155/2021/6669193","url":null,"abstract":"The fast preliminary design and safe operation of turbomachines require a simple and accurate prediction of axial thrust. An underestimation of these forces may result in undersized bearings that can easily overload and suffer damage. While large safety margins are used in bearing design to avoid overloading, this leads to costly oversizing. In this study, the accuracy of currently available axial thrust estimation methods is analyzed by comparing them to each other and to theoretical pressure distribution, numerical simulations, and new experimental data. Available methods tend to underestimate the maximum axial thrust and require data that are unavailable during the preliminary design of turbomachines. This paper presents a new, simple axial thrust estimation method that requires only a few preliminary design parameters as the input data and combines the advantages of previously published methods, resulting in a more accurate axial thrust estimation. The method is validated against previously public data from a radial pump and new experimental data from a centrifugal compressor, the latter measured at Lappeenranta-Lahti University of Technology LUT, Finland, and two gas turbines measured at Aurelia Turbines Oy, Finland. The maximum deviation between the estimated axial thrust using the hybrid method and the measured one is less than 13%, while the other methods deviate by tens of percent.","PeriodicalId":46335,"journal":{"name":"International Journal of Rotating Machinery","volume":"2021 1","pages":"1-18"},"PeriodicalIF":0.9,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47137297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5