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Kunming, China

Zhou J.,South China University of Technology | Li L.,South China University of Technology | Hu Y.,Guangxi University of Technology | Wang M.,Kunming Yunnei Power CO.
Materials Science Forum

The article points out the television plastic part size, giving the general design route, then describing the general design process of television back shell by Pro/E. The mold design also is introduced, including mold cavity distrubition, size determining of cavity mold and punch mold, selection of mold frame, set of pushing rod and stripping, sizes of part and mold, side core-drawing mechanism, cooling system design, mold's assembly, through simulation, the mold's design can be determined whether good or bad. Source

Lei J.,Kunming University of Science and Technology | Qin Z.,Kunming University of Science and Technology | Jia D.,Kunming University of Science and Technology | Song G.,Kunming Yunnei Power CO. | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

The helical intake port geometry directly controls swirl ratio, volumetric efficiency and combustion characteristics as well as emissions reduction of diesel engine. A new digital design method of helical intake port was studied. In this method, cylinder head structure was considered as a constraint condition, and the swirl ratio was considered as the design target; then the flow coefficient was optimized. The effect of the geometry structure and port sensitive areas of diesel engine helical intake port on the intake port flow characteristics was analyzed, and several key structural parameters of helical intake port were defined. As a result, a parameterized mathematical model of helical intake port was established. Based on parameterized mathematical model of helical intake port and several key structural parameters of helical intake port, a digital modeling software about diesel engine helical intake port was developed. For the design requirements of helical intake port of self-developed horizontal two-cylinder diesel engine, a digital 3D model of helical intake port was established by using the helical intake port digital modeling software, and model smoothness and flow characteristics of this 3D model were analyzed. The results show that helical intake port digital design method has a certain feasibility and versatility. Just providing with the design requirements of the cylinder head structure and flow characteristics (swirl ratio and flow coefficient), a helical intake port that meets the requirements can be designed through using the digital design method and modeling software. ©, 2015, Chinese Society of Agricultural Machinery. All right reserved. Source

Li L.,Kunming University of Science and Technology | Yu K.,Kunming University of Science and Technology | Li Y.,Kunming Yunnei Power CO.
Lecture Notes in Electrical Engineering

In the manufacturing industry, each enterprise will encounter in the negative inventory balances problem in the warehouse management. The problems of negative inventory balances management, has become the bottleneck of processing flexibility of storage services. Allowing negative balances, it will facilitate delivery of cargo from storage rather than management. Does not allowing negative balances, it will facilitate management rather than delivery of cargo from storage. Aiming at this problem, this paper discusses the causes of negative inventory balances and the corresponding solutions, and we proposed some suggestions about treating the phenomenon of negative inventory balances. © 2012 Springer-Verlag. Source

Yan W.-S.,Kunming University of Science and Technology | Chen H.,Kunming University of Science and Technology | Shen L.-Z.,Kunming University of Science and Technology | Yang Y.-Z.,Kunming Yunnei Power CO. | Lei J.-L.,Kunming University of Science and Technology
Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering

In order to clear effect of atmospheric pressure on performance and emissions of the diesel engine fueled with diesel oil mixed by 15% hydrous ethanol, comparative tests on bench were conducted in a turbocharged diesel engine fueled separately with pure diesel oil and E15 hydrous diesel/ethanol blend under different atmospheric pressures. Results indicate that with the atm. pressure rising, engine power is slightly increased; the brake specific fuel consumption b e gets great improvement with the atm. pressure rising from 81 kPa to 90 kPa, while with it rising from 90 kPa to 100 kPa, the improvement lowers; and the atm. pressure rising has little influence on b e in low load condition but has remarkable influence in middle and high load conditions. At 81 kPa atm. pressure, HC and CO emissions go up significantly in low and middle load conditions, but with atm. pressure rising it gets remarkable improvement, meanwhile in high load conditions the HC and CO emissions trend to diesel engine level or worse. The atm. pressure has little influence on NO x emissions, but NO x emissions have a slight drop at all load conditions. When the atm. pressure declines below 90 kPa, the smoke has a remarkable drop compared to that of diesel engine. When the atm. pressure is over 90 kPa, the improving effect weakens. Source

The effect of graphitization and high sulfur nitrogen recarburizer on mechnical properties of engine cylinder head was studied. The production test show that tensile strength of separately cast bar was increased 50 MPa, hardness was increased HBS10, the processing performance of cylinder head was improved, the production cost was decreased. © 2015, Chinese Mechanical Engineering Society. All right reserved. Source

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