International Journal of Mechanical Engineering and Applications最新文献_第7页

The Effect of the Fluid Film Variable Viscosity on the Hydrostatic Thrust Spherical Bearing Performance in the Presence of Centripetal Inertia and Surface Roughness Part 2, Recessed Fitted Bearing 向心惯量和表面粗糙度下油膜变粘度对静压推力球轴承性能的影响

International Journal of Mechanical Engineering and Applications Pub Date : 2018-09-11 DOI: 10.11648/J.IJMEA.20180603.15

Ahmad Waguih Elescandarany

{"title":"The Effect of the Fluid Film Variable Viscosity on the Hydrostatic Thrust Spherical Bearing Performance in the Presence of Centripetal Inertia and Surface Roughness Part 2, Recessed Fitted Bearing","authors":"Ahmad Waguih Elescandarany","doi":"10.11648/J.IJMEA.20180603.15","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20180603.15","url":null,"abstract":"The study deals with the fluid viscosity variation, the centripetal inertia and the bearing surface roughness affecting the externally pressurized thrust spherical bearing performance where the partial differential equation of the temperature gradient previously derived from the fluid governing equations, is integrated and applied to this type of bearings to calculate and predict temperature distribution along the fluid film. In this part of the research, the recessed fitted type of bearings has been studied deriving mathematical expressions that not only cover this configuration but also cover the fitted type of this bearing with its different configurations and showing also the recess effect on the bearing performance. The results showed the effect of the viscosity variation on the pressure, the load caring capacity, the fluid flow rate, the frictional torque, the friction factor, the power factor, the stiffness factor and the central pressure ratio as well as the effect of the speed parameter and the eccentricity on the temperature rise. Applying these derived mathematical expressions, which could be considered as a general solution for the fitted type, an optimum design for the fitted type with its different configurations (with and without recess; hemispherical and partial hemispherical seats) has been performed. Using the same bearing dimensions, the application of these equations proved the excellence of the aforementioned optimum design of this bearing in our previous papers where the temperature of the outlet flow was less than 14 degrees centigrade over its inlet temperature.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132353525","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: 2

A Simulation Study on Energy Consumption and Cost Analysis of Hybrid Electric Motorcycle 混合动力摩托车能耗仿真研究及成本分析

International Journal of Mechanical Engineering and Applications Pub Date : 2018-08-08 DOI: 10.11648/J.IJMEA.S.2018060401.11

N. V. Trang, P. Anh, H. Thinh

{"title":"A Simulation Study on Energy Consumption and Cost Analysis of Hybrid Electric Motorcycle","authors":"N. V. Trang, P. Anh, H. Thinh","doi":"10.11648/J.IJMEA.S.2018060401.11","DOIUrl":"https://doi.org/10.11648/J.IJMEA.S.2018060401.11","url":null,"abstract":"Recent years have seen the development of the hybrid electric motorcycle in order to reduce pollutant emissions and the fossil-fuel consumption of transportation. This paper presents a research of energy consumption and essential cost of innovative technology that is applied on two wheels motorcycle based on the platform of Honda Lead 110cc. The front wheel is replaced by a DC electric hub motor powered by lithium-ion battery. The rear wheel is driven by drive train integrated with a continuously variable transmission as its origin. Both of them are able to provide propulsion torque separately or simultaneously. Through simulations of vehicle driving range using popular driving cycles, it is demonstrated that there is considerable benefit in fuel economy. The plug – in hybrid structure without generator is effective choice to renovate a traditional motorcycle in traffic condition of Vietnamese cities. The fuel consumption of plug – in hybrid motorcycle can be 0.567 l/100 km less than original in case of rider only. The results show that performance characteristics of the plug – in hybrid motorcycle are likely to achieve the desired acceptance that original one currently achieve. This study offers a favorable support for further development of hybrid electric motorcycle.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122556722","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: 2

Analytical Solution of Stiffness for a Corner-Fillet Leaf-Spring Type Flexure Hinge with a Long Fatigue Life 长疲劳寿命角圆角叶弹簧型柔性铰链刚度解析解

International Journal of Mechanical Engineering and Applications Pub Date : 2018-06-29 DOI: 10.11648/J.IJMEA.20180603.14

Li Ruiqi, W. Baisheng, Chen Xin, Y. Zhijun

{"title":"Analytical Solution of Stiffness for a Corner-Fillet Leaf-Spring Type Flexure Hinge with a Long Fatigue Life","authors":"Li Ruiqi, W. Baisheng, Chen Xin, Y. Zhijun","doi":"10.11648/J.IJMEA.20180603.14","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20180603.14","url":null,"abstract":"Flexure hinges as the displacement guiding and amplifying mechanism or sensing component are widely used for micro-actuators and sensors. However, the existing flexure hinges, leaf-spring or notch type, cause serious stress concentration which severely weaken the fatigue life of compliance mechanism. Therefore, developing long fatigue life flexure hinges is very important for high working frequency actuators and sensors, such as fast-tool-servo. Corner-fillet leaf-spring type flexure hinge could provide large displacement with lower stress. Stiffness expressions of it with both fixed-fixed and fixed-guided boundary conditions are derived by using Castigliano’s theorem. The main influence factors for stress concentration are investigated and the formulas of stress concentration factor are obtained in terms of ratio of fillet radius to the minimum thickness. These analytical formulas have been verified by comparing with finite element analysis (FEA) results. Stress-life method is chosen to research the influence of fillet radius on fatigue life and the results indicate fillet radius can improve fatigue life of flexure hinge effectively. The proposed analytical solution is the fundamental of optimal design of a leaf-spring type flexure hinge based mechanism with fatigue life constraints.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129762359","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: 0

Research and Development of Economical CNC Software for 2D Lean Friction Stir Welding Machine 二维精益搅拌摩擦焊机经济型数控软件的研究与开发

International Journal of Mechanical Engineering and Applications Pub Date : 2018-06-21 DOI: 10.11648/J.IJMEA.20180603.13

D. Balla, Zhou Hu, Xu Chi

引用次数: 0

Modification and Manufacturing of Cereal Crop Harvesting Machine 谷物收获机械的改造与制造

International Journal of Mechanical Engineering and Applications Pub Date : 2018-06-11 DOI: 10.11648/J.IJMEA.20180603.12

Seleshi Tilahun Tiruneh

{"title":"Modification and Manufacturing of Cereal Crop Harvesting Machine","authors":"Seleshi Tilahun Tiruneh","doi":"10.11648/J.IJMEA.20180603.12","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20180603.12","url":null,"abstract":"Today the development of agricultural sector is increasing from year to year. The rice, wheat and other cereals are the focus of many farmers in Ethiopia. But to harvest on time the cereals, intensive human power is needed. Most of the time students starting from elementary level up to university level participate on harvesting of cereals due to unbalance rainfall. To solve this problem, harvesting machines are very essential. Harvesting machinery or equipment is a mechanical device used for harvesting different types of crops. The use of modern tractors, combine harvesters and related heavy machineries is still very limited in Ethiopia. On the other hand, a rising trend in the import of tractors and harvesters is being observed as of recent years. Small-scale farmers on their part are looking more into the use of small mechanically-powered equipment both for crop production and post-harvest activities. From the available machines in the world, different cereal crop harvesting machines were assessed. Using different selecting criteria mower is selected. The design and economic analysis is performed for the selected harvesting machine. Different parts of the machine are designed including material selection and different force analysis like bending, shear stress. Finally parts and assembly drawings are drawn and the prototype is manufactured from the available materials.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129292848","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: 1

Particle Focusing in Microchannel with Multi-Parallel Channels or Porous Orifice 多平行通道或多孔孔微通道中的粒子聚焦

International Journal of Mechanical Engineering and Applications Pub Date : 2018-05-28 DOI: 10.11648/J.IJMEA.20180603.11

H. Kumamaru, Hirofumi Sugami, M. Nakahira, N. Takagaki

引用次数: 1

Research and Development of the Wind Turbine Reliability 风力发电机可靠性的研究与发展

International Journal of Mechanical Engineering and Applications Pub Date : 2018-05-18 DOI: 10.11648/J.IJMEA.20180602.14

Yao Li, Cai-chao Zhu, Chaosheng Song, Jianjun Tan

引用次数: 17

A New Detection Method for Oxygen, Nitrogen and Hydrogen on Superalloy Milling Surfaces 高温合金铣削表面氧、氮、氢检测新方法

International Journal of Mechanical Engineering and Applications Pub Date : 2018-05-15 DOI: 10.11648/J.IJMEA.20180602.13

S. Tao, Jin Liang, Dengwan Li, Zhong Ling, Chunyuan Gong

引用次数: 2

An Improved Radar-Graph Method for Comprehensive Evaluation of Material Machinability 材料可加工性综合评价的改进雷达图法

International Journal of Mechanical Engineering and Applications Pub Date : 2018-05-11 DOI: 10.11648/j.ijmea.20180602.12

Tao Sun, Jin Liang, Dengwan Li, Hui-min Wang, Xinxing Li

引用次数: 1

Research on the Near Net Shape Hollow Forging Technology for CAP 1400 Main Pipe CAP 1400主管近净形空心锻造工艺研究

International Journal of Mechanical Engineering and Applications Pub Date : 2018-05-08 DOI: 10.11648/j.ijmea.20180602.11

Wang Baozhong, Liu Ying, Guo Yi, Ni YiHong

{"title":"Research on the Near Net Shape Hollow Forging Technology for CAP 1400 Main Pipe","authors":"Wang Baozhong, Liu Ying, Guo Yi, Ni YiHong","doi":"10.11648/j.ijmea.20180602.11","DOIUrl":"https://doi.org/10.11648/j.ijmea.20180602.11","url":null,"abstract":"It has been widely focused because of its complex integral-structure and strict technical requirement since AP1000 main pipe appeared, which is made by 316LN stainless steel. After ten years of effort and exploring, excellent forging suppliers from all over the world agree that 316LN heavy forgings including AP1000 only can be formed by relatively simple solid forging technology though the grain size cannot meet the initial design requirement of ASTM level-4. The design concept of CAP1400 main pipe is the same as AP1000, in which the straight part, curving part and two supper-long asymmetrical nozzles should be an integrated structure manufactured by 316LN steel. But due to larger dimension and higher requirement for technology, the manufacturing of CAP1400 is more difficult. In order to realize the near net shape manufacturing of CAP1400 main pipe, we invent a green manufacturing technology with highly asymmetrical nozzle for stainless steel main pipe hollow forgings, We have successfully manufactured a stainless hollow forgings using a 78t ESR ingot with nozzle height of 400mm, wall thickness of 160mm, total length of 9000mm, and ASTM level 4-6 of grain size for each part.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116616965","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: 0