Advanced Materials Research Vols. 308-310

Abstract: A vibrational energy-recycling vibration damper is introduced which can recycle some vibrational energy by exporting pressurized oil from rebound cavity to energy accumulator. Pressurized oil can be used for HPS, hydraulic power braking and so on which saves energy. Nonlinear parameterized model of damping characteristics is constructed by fluid mechanics theory, and simulation is made under MATLAB. The results show that damping characteristics of the vibration damper is better than conventional dampers.

Abstract: The internal energy of working fluid in Twin-Rotor piston engine is transmitted into mechanical energy by differential velocity movement between the couple of rotors coaxial installed. The blade piston, a part of the power transmitting mechanism, is the most important component working in the worst condition in the engine. It withstands heavy mechanical and thermal loads as working at a high rotating speed, that is to say it undertaking the explosive force straight and transmitting the power to power transmitting mechanism at the first time. So the section shape of blade piston on the rotor affects power output of the engine directly. In order to select the section shape of blade piston properly, improve output capacity and reduce the affect of deformation, models of several typical shapes of the blade piston is set up. Based on the comparison of aspect ratio, analysis and size optimization are performed. The results show that the rectangular cross-section blade piston is more efficient in power transmission with small deformation and larger torque as long as the values of aspect ratio are in a reasonable range.

Abstract: Integration of the cognitive approach to human body and the technical system as the main design theory and information technology, innovative design from the mechanical and electrical products, ways of thinking, creative problem solving strategies designed to mechanical and electrical product manufacturing processes, synchronization means of design and manufacturing innovation, through the CAD/CAPP two-way data flow, the introduction of genetically achieved CAPP/CNC's highly integrated, effectively improve the mechanical and electrical product innovation capabilities.

Abstract: To solve the problems of bending, deformation, complicated, hard to center occurred in the assembly welding of coiled tubing; the coiled tubing Straightener is developed by backward applying the theory of three-point bending. Its prominent features are: pressure head pushes directly from the middle; external circular arc explorators on the two sides rotate and support. It realizes the fast and damage-free straightening of coiled tubing. By replacing pressure head, changing the external circular arc radius of explorators on the two sides and adjusting the distance between two symmetrical support points, it can do the precise straightening of available metal coiled tubing of all specifications.

Abstract: This paper proposes a new description method of truss structure based on adjacent matrix and the expression of element stiffness matrix (ESM) containing the joint number. Furthermore a procedure is also given for obtaining a general total stiffness matrix (GTSM) by using the method of large domain transformation matrix (LDTM). GTSM can reduce the difficulty in designing variable geometry trusses.

Abstract: In this paper a novel two-inlet MSW shredder was presented to overcome the intermission work of the single-course shredder. The reliability of the two-inlet shredder was investigated and four organic constituents of MSW namely plastic, kitchen garbage, leaves and branch were shredded in the two-inlet shredder to evaluate the shredder adaptability to MSW complex composition. The results show that compared with single-course shredder, the two-inlet operation mode improves shredding efficiency and reduces energy consumption to a great extent. With the double-inlet operation，about 73% as much energy is used per gram as with the single-course shredder. The shredder is much more effective for the pulverization of soft, ductile and fibrous materials (kitchen garbage and leaves in the test), but it is not good at the brittle material (branch). A total of 57.7% product of branch is below 10mm in size, while for kitchen garbage and leaves, the values are 97.7% and 92.5% respectively. And the value is the lowest for plastic, only 38.0 %.

Abstract: A series of lanthanide complexes with acetylacetonate and a new asymmetrical 5-[p-(4-fluorobenzoyloxy)-m-ethyloxy]phenyl-10,15,20-triphenylporphyrin were prepared and characterized by elemental analyses, molar conductance, UV-Vis, IR, 1H NMR, luminescence spectra and themal analysis. Quantum yields of Q band fluorescence are in the region 0.073-0.097 at room temperature. Complexes have higher stability (decompose until 211°C). The structure that both the porphyrin behaved as a tetradentate ligand and acetylacetonate as a bidentate ligand are coordinated to a rare earth ion also has been proposed.

Abstract: A diagnostic technique that can estimate quantitatively wear amounts under lubricated condition was tentatively designed using the on-line particle concentration and counting technique. In this proposed device, the standing surface acoustic wave (SSAW) was used to concentrate the wear debris in the lubricating oil in a micro-channel, the debris were then delivered to an appropriately sized detector and scanned one by one. The size and number of wear debris in the circulating oil could be therefore measured and counted on-line. The volume of each wear particles was calculated by accumulating each volume in real time. The wear debris amounts obtained by this quantitative estimation technique were fairly similar to the measured values of mass loss of the specimens. This proposed device was conveniently embedded in the lubricating system. This study was expected to open new avenues for the real time fault diagnosis and life prognosis of machine.

Abstract: There is a new idea on the billet casting Q235 with size of 165mm×165 mm,It involves a couple technology to cool molten steel both from inside and outside, namely: to emplace an inner cooler -a pipe with the shape of letter U in the mould. It aims to increase the thermal conductivity and improve the inner structure of the billet. With the help of Fluent -a kind of CFD business soft ware, a numerical simulation is undertaken to testify the condition of the molten steel in the inner-outer cooling mould coupled by flow field and temperature field.

Abstract: This work reported that porous flower-like CeO2 microspheres have been successfully synthesized via a controlled template-free precipitation method and were used as catalyst support for the oxidation of CO and benzene. The scanning electron microscopy results showed that ceric concentration has great influence on the morphology of CeO2 micro and nanostructures. This flower-like CeO2 microstructure exhibited a superior low-temperature catalytic activity used as catalyst support compared with conventional CeO2 nanoparticles. The enhanced catalytic activity of flower-like CeO2 microspheres could be attributed to its porous structure and the abundant oxygen vacancies on the surface.