Applied Mechanics and Materials Vols. 380-384

Abstract: Hydraulic Cylinder is one of the most commonly used excutive components of hydraulic transmission system. Its quality is directly related to the performance of the whole design components. Based on the SolidWorks 2007 environment and theory of the parametric design with the support of rhe programming tool of Visual Basic, the digital design system for hydraulic cylinder is established, as a result, the design efficiency and quality are heightened.

Abstract: The 3D modeling software of Solidworks was used in the paper for the 3D modeling of large banana vibration shaker. And then the 3D model was imported into Ansys Workbench for finite element analysis. The overall stress and strain distribution of the shaker could be got under static loading. Secondly, the analysis of the dynamic characteristics of the entire shaker should be done, and the modal frequencies and mode shapes could be got through the analysis of the modal analysis results. Finally, the hammering test was done to verify the theoretical analysis. And it also provided a necessary theoretical basis for the design and improvement of the entire shaker.

Abstract: During the compression test of automobile safety airbag, traditional methods cannot analyze the process with detail, because it takes human, vehicle and airbag as a macrocosm, so it cannot give out the instantaneous diversification. The method of finite element analysis was used to show the detailed process with infinitesimal analysis, with which, precise model is build. The curve of air pressure varies with time, the Volume of airbag varies with time and the Acceleration curve varies with time was analyzed. The outcome showed that this method can analyze the process action of airbag perfectly, and maybe it can guild the improvement of the airbag design.

Abstract: High-voltage converter technology applied in coal mining ventilator could gain a great deal of operating effectiveness and economic benefits. This paper illustrates the reformation of main ventilation system in some coal mine of Shanxi province. The defective operation conditions of previous mining ventilator and the advantage of converter control system applied in the mining ventilator are also proposed by this paper. The mathematical model of direct torque control (DTC) method used in the system is analyzed by giving dynamic model of stator flux oriented. The transformed design of converter control system with the benefits of highly enhanced energy-saving and environmental protections is involved as well as its operating statistics on energy-saving effect.

Abstract: In order to forecast the using life of the armored vehicle engine synthetically, the index system of the armored vehicle engine using influence factors is established by means of the relativity analysis method, while the weightiness values of the indexes are calculated out by AHP. Taken as similar systems, different engine using environments are evaluated quantificationally in applying of the similar system theory and its measurement, and the actual consumable of motor hour for the engine under different using conditions is figured out defining the engine using condition correctional coefficient. As a result, the right weightiness matrix of the engine using influence factor indexes as well as the calculation method of evaluating the armored vehicle engine life under different using conditions is given. The feasibility and validity of the method is proved by the instance calculated.

Abstract: [Purpose] To solve problems in design of the cutter for seedling vegetable harvesters, a cutter with a double-eccentric circle cam mechanism has been built. [Method] A mathematical model for kinematic analysis of cutters driven by a double-eccentric circle cam mechanism has been established. Under the model, Matlab has been employed to make kinematic analysis on displacement, speed and acceleration. Also, SolidWorks software has been adopted for virtual design of parts and assemblies of the cutter. [Results] The cutter has been applied to the seedling vegetable harvester for the experimental purpose and turned out to operate reliably and produce uniform height and leveling shearing fracture. [Results] This design will provide theoretical basis and practical reference for relevant researches.

Abstract: [Purpos] in order to solve design problems of the cutter for the seedling vegetable harvester, a reciprocating cutter with a crank linkage mechanism has been designed. [Metho SolidWorks software has been adopted for virtual design of parts and assemblies of the reciprocating cutter for the seedling vegetable harvester. A mathematical model for kinematic analysis of the cutter taking a crank linkage mechanism as its transmission system has been built. Matlab is used for kinematic analysis on the double-crank linkage mechanism from aspects of displacement, velocity and acceleration of followers. [Result The cutter has been applied to the seedling vegetable harvester for the experimental purpose and turned out to operate reliably and produce uniform height and leveling shearing fracture. [Conclusion Results indicate that the cutter has been reasonably designed, which will provide theoretical and practical basis for related design.

Abstract: [Purpos in order to solve design problems of the hole-punching system for the pot-seedling hole-punching machine, a system featuring reliable operation, simple structure and stable performance has been designed in accordance with working requirements. [Metho MATLAB is used for accurate calculation of the cam profile, with the calculated results imported to SolidWorks to produce cam profile curves. Such curves are then modified according to working requirements, thereby to build a 3D model for the cam mechanism. Finally, a 3D model for the complete hole-punching system is built with SolidWorks. [Result The hole-punching system designed herein is applied to the pot-seedling hole-punching machine and after performance test has proven to be able to meet working requirements and work reliably. [Conclusion The design of this system can provide theoretical basis and reference for related research.

Abstract: Three-dimensional CAD system is designed by using PRO-E tools. In particular, gear model has been widely used. The usual design philosophy is to perform parametric modeling based on different gears, find the relationship between different parameters, make use of restrictive relationship between different parameters, and complete its modeling process. In this paper, on the basis of this concept, the amount of modification is adaptively determined according to the actual conditions of the operational test situation in actual working conditions, and model modification lengths are optimized in which the amount of model modifications can all be allocated in the active or passive wheel sprocket teeth, and can also be modified both in active and passive wheel. Model modifications are done only in double tooth meshing zone and the gradually open lines in single tooth meshing zone are not modified to ultimately achieve the purpose of gear model optimizing.

Abstract: For comprehensively and quantify analyzing the resource of cryogenic valve fault, improving the operating reliability of cryogenic valve, by means of the dynamic character analysis in the operation reliability of cryogenic valve, dynamic reliability influence factors of cryogenic valve are analyzed by the introduction of on man-machine-environment system theory, and a model of dynamic reliability influence of cryogenic valve is established by the quantify analyzing of man-machine-environment influence factors to evaluate the reliability of cryogenic valve and to construct operation improving measures. Finally, this method was demonstrated and validated by a sample. It has shown the proposed method can improve the benefit of dynamic reliability researching of cryogenic valve, and provide a support for adapting to complex and dynamic operating environment of cryogenic valve.