共查询到20条相似文献,搜索用时 265 毫秒
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《机械工程材料》1985,(2)
Article 1. This Law is enacted to protect patent rights for inventions-creations, to encourage inventioncreation, to foster the spreading and application of inventions-creations, and to promote the development of science and technology, for meeting the needs of the construction of socialist modernization. Article 2. In this Law, "inventions-creations" mean inventions, utility models and designs. 相似文献
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《机械工程学报(英文版)》2003,(1)
Honorary Chairmen: Lei Tianjue Wang Buxuan Pan Jiluan Lu YongxiangChairman: Zhong QunpengVice Chairmen: Xu Binshi Song Tianhu Liu Fei Shi ZhipingMembers: 相似文献
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《机械工程学报(英文版)》2004,(1)
Honorary Chairmen: Lei Tianjue Wang Buxuan Pan Jiluan Lu Yongxiang Chairma: Zhong Qunpeng Vice Chairmen: Xu Binshi Song Tianhu Liu Fei Shi Zhiping Members: 相似文献
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《机械工程学报(英文版)》2005,18(2):F004-F004,F003
Honorary Chairmen:Lei Tianlue Cha云rma:Zhong QunPeng V奋ce Chairmen:Xu Binshi Song Members: Wang Buxuan Pan JIluan Lu YongXiang Tianhu Liu Fei Shi ZhiPing Albert 5 H Chang China Institute of TeChnoIOgy, Tajwan,China B ian Xiufeng Shandong University, Chin… 相似文献
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《机械工程学报(英文版)》2006,(2)
Honorary Chairmen:Wang Buxuan Pan JIluan Lu Yongxiang Cha获rman:Zhong QunPeng Viee·Chairmen:Xu Binshi Song Tianhu Liu Fei Shi ZhiPing Members: Albert 5 H Chang Vanung University, Taiwan,China B ian Xiufeng Shandong Univers你Ch加a Cao Jian Northwestern University, USA Chen Xinzeng Nj门gbo UniVersity,China Chen Xinzhao Hefei University of Teehnology, Ch的a Chen XuejunXi’an Jiaotong UniVers你China Chen Ying Zhejiang Unjversi祝China Chen Yubao The UniversjtyofMie… 相似文献
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《机械工程学报(英文版)》2007,(4)
Honorary Chairmen:Wang Buxuan Pan Jiluan Lu Yongxiang Tom Bell Chairman:Zhong Qunpeng Vice-Chairmen:XuBinshi Song Tianhu Liu Fei ShiZhiping Members: 相似文献
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研究了多层片式瓷介电容器(MLCC)受高温时的容值变化。结合MLCC的特点,提出了其在引信中的使用方法,同时,讨论了温度稳定性对电子产品设计的影响。实验结果表明,低频MLCC的容值受温度影响较大。 相似文献
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A. N. Ser’eznov A. V. Mal’tsev L. N. Stepanova S. I. Kabanov V. N. Chaplygin S. A. Laznenko A. E. Kareev V. L. Kozhemyakin 《Russian Journal of Nondestructive Testing》2004,40(9):573-579
The results obtained by acoustic-emission (AE) testing and continuous tensometry in endurance testing of half-axles of maneuverable aircrafts stabilizers are described. In order to ensure the reliability of the tests, fractography of the fractures obtained is carried out along with metallographic studies of the materials structure in the zone of fracture nucleation and propagation.Translated from Defektoskopiya, Vol. 40, No. 9, 2004, pp. 3–10. Original Russian Text Copyright © 2004 by Sereznov, Maltsev, Stepanova, Kabanov, Chaplygin, Laznenko, Kareev, Kozhemyakin. 相似文献
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The complex resistance of silicone–carbon films of thickness more than 3 m is measured on the basis of an analysis of the electrotechnical substitution circuit containing a capacitor and a resistor. It was found that the parameters of the equivalent circuit determined experimentally make it possible to estimate whether the film thickness is greater than 3 m or not, i.e., to measure the film thickness more than 3 m. In this case, at frequencies higher that 100 kHz only the capacitive component of the impedance can be measured, whereas the active component associated most likely with the presence of silicon carbide in the film material was detected at lower frequencies. It is shown that for carrying out similar experiments with thinner coatings it is necessary to use a probe covered by a dielectric material with the higher dielectric constant. 相似文献
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The total power loss of gears was measured in a back-to-back gear test rig. Test equipment, measuring principle and evaluation of the data are described. The influence of different lubricant type, viscosity and temperature on mesh and churning losses was investigated. The churning losses depended mainly on the viscosity of the lubricant and on the operating conditions, not on the lubricant type. The mesh power loss depended mainly on the type of lubricant, not on viscosity, temperature, or oil additives. Churning losses can be reduced by using low viscosity lubricants. Mesh power loss can be reduced by as much as 50 percent of the power loss of mineral oils by using polyglycol-type lubricants. In wide application ranges, viscosity and oil additives do not influence mesh power loss. An experimentally-based equation for the coefficient of friction in the gear mesh is given. Earlier derived equations for the mesh power loss of different gear geometry were confirmed. 相似文献
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S. Arungalai Vendan S. Manoharan G. Buvanashekaran C. Nagamani 《The International Journal of Advanced Manufacturing Technology》2009,43(11-12):1144-1156
Magnetically impelled arc butt (MIAB) welding is a unique forge welding process in which an arc is drawn in the gap between the two tubes to be welded in order to raise them to a high temperature to allow forging to form a solid-state weld. In this case, the arc is rotated with a high speed around the weld line by an electromagnetic force resulting from the interaction of the magnetic field and the arc current. This paper presents the details of the results and the conclusions of the experimental trials conducted on the MIAB module designed and developed based on the principle. Further, nonlinear electromagnetic analysis has been performed to determine the magnetic field and electromagnetic force distribution in MIAB process using finite element package ANSYS. Typical results of this analysis pertaining to magnetic field are compared with the experimental data for steel tubes (outer diameter 47 mm and thickness of 2 mm). It is observed that the results from finite element analysis and the experimental trials are in excellent agreement. The proposed three-dimensional finite element method model for electromagnetic force distribution facilitates comprehensive understanding of the arc rotation process in MIAB welding. 相似文献
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《Wear》1987,120(1):61-74
Controversy exists in the published literature as to the effect of silicon content and pressure on the dry sliding wear of AlSi alloys. The present paper attempts to clarify the question by reporting a statistical analysis of data obtained from factorially designed experiments conducted on a pinon-disc machine in the pressure range 0.105–1.733 MPa and speed range 0.19–0.94 m s−1. Under these conditions it was found that, in the range 4–24 wt.% Si, wear of binary unmodified alloys does not significantly differ between the alloys. However, it is significantly less than that corresponding to an alloy containing no silicon. The effect of pressure on wear rate was found to be linear and monotonie and, over the narrow range of speeds used, the wear rate was found to be unaffected by speed. The coefficient of friction was found to be insensitive to variations in silicon content, pressure and speed. 相似文献
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Gordeev B. A. Lyubimov A. K. Okhulkov S. N. Titov D. Yu. Ermolaev A. I. 《Russian Engineering Research》2019,39(9):732-738
Russian Engineering Research - The amplitude–frequency characteristics of hydraulic bearings under the action of broad-band random vibrations with different input root-mean-square... 相似文献
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Tribological processes that occur in the zone of the facing–tool contact can be satisfactorily described using a three-zone model in which zones of adhesion, seizure, and friction are distinguished. An expression that relates the coefficient of friction under cutting to the distribution of the zones of friction over the surface of contact has been obtained, causes for the origination of the zone of adhesion have been analyzed, and the shear strength of boundary films has been estimated. A model that describes the kinetics of the formation of a boundary lubricating film in the zone of friction with account for the dimensions and the shape of surfactant molecules, as well as the concentration of surfactants, has been developed. The results of the calculations have shown good agreement with the experimental data. 相似文献
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Abstract The interaction of vinyl chloride (VC) with water is used as the model system for the investigation of the determination of diffusion coefficients of gases into liquids from revered‐flow gas chromatography (RF‐GC). A thorough, full investigation of the initially suggested methodologies of RF‐GC [Anal. Chem. 1989, 61, 2231–2237 and Adv. Chromatogr. 2000, 40, 231–273] is carried out. The appropriate experimental conditions for the measurement of accurate liquid diffusivities (e.g., quiescent or stirred liquids) are investigated, and an insight into the physical meaning of the measured physicochemical parameters is attempted. In order for liquid diffusion to be the main broadening factor, it is necessary to ensure the regularity of the liquid stationary phase, which can be achieved by stirring the liquid substance under study. Furthermore, the experimentally obtained diffusion coefficients, the respective mass transfer coefficients, as well as the activation energy for the diffusion of VC in water are of the same order of magnitude and are very close to the values obtained by other techniques or calculated from empirical equations, ascertaining the potential of the presented methodology. 相似文献
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This new utility model is published a new tire. It mainly includes the tire and flap. In addition, it also includes two or more inner tubes. The tubes said above stand side by side and are connected with the wheel rim. The tire covers the inner tube, and the flap equiped between the inner tube and the wheel rim. 相似文献