Advanced Materials Research Vols. 791-793

Abstract: To analyse the road-header rack and pinion by using the finite element analysis software COSMOS/WORKS. Compared to the traditional analytic calculation and numerical analysis method, it is more intuitively get 28 ° pressure angle spur gear rack meshing stress and strain distribution, which can rack and pinion improvements designed to provide scientific reference.

Abstract: Cantilever is a key component of Mine Hydraulic Grilled Slag Machine and also is an important bearing member. Parametric analysis and optimization calculation should be done to meet the requirements of its strength and rigidity. It can reduce weight and stress concentration, which makes its structure size more reasonable. With the aid of Solid works 3D modeling software, people can create the working device model. Importing adams to create its virtual prototype model to make dynamics simulation analysis and draw variation graph of key points during its working process to lay the foundation for the finite element analysis.

Abstract: In order to provide a kind of simple structure, low cost, easy operation and high safety performance improvement of hydraulic support's advancing support method, this paper designed a kind of rolling advancing support device of hydraulic support. The device is fixed on the hydraulic support beam, made the top beam and roof between sliding friction into rolling friction, improved the advancing support method to move the rack doesn't need to drop column and column, directly to push the slip plane, simplifies the shift process, accelerated the propulsion speed of working face; At the same time, rolling advancing support device of hydraulic support with hydraulic support of the top beam fixed to form two new support overall, improve the performance of hydraulic support support, prolong the service life of hydraulic support.

Abstract: Coal mine horizontal belt extension transfer machine is designed in order to solve the mine loading efficiency is not high, especially the most loading mechanical failed to solve continuous loading problem. Among them, the tractor as power to provide the transfer machine, its importance cans be imagined. Through the statics analysis of the tractor frame, we draw the conclusion: Preliminary plan is too conservative given frame size, frame heavier, cause material waste, processing difficult. We will through two aspects of size parameters optimization and material optimization design, make the tractor frame on the premise of guarantee function materials more provinces, lighter weight, lower cost. Size options and set up new material selection, and then we stand for the statics analysis. Analysis results show that our lightweight design of tractor frame is a success.

Abstract: This paper builds two water hydraulic poppet valve models which are of different structure, and simulation analysis used by FLUENT software on it’s internal flow field. The analysis results show that, after improving the structure of water hydraulic poppet valve, import and export pressure value differences decreased, effectively restrains the generation of cavitation, reduces the vibration amplitude and turn down noise, reduces loss of turbulent energy, the overall performance is superior to the traditional structure.

Abstract: The worsening in the environment and non-renewable resources are becoming scarce today, environmental protection, energy conservation has been deep into all aspects of social life. Flush toilets cost in view of the traditional water resources, pollution of the environment, and many other defects, and combined with the research status at home and abroad, the paper aims to study environmental intelligent to free water flush toilets green design its harmonic response analysis. This paper describes the environmental Smart Free water flush toilets mechanical part of the green design, including the design of the transmission system, mixing system design and green design of the exhaust system, especially introduces the main components of the spiral drum structure, transmission, installation. Secondly, Pro / Engineer to establish three-dimensional model of the spiral drum harmonic response analysis, finite element analysis software ANSYS platform, spiral drum.

Abstract: In this paper, finite element software ANSYS is used to simulate a process of disc cutters of different diameter breaking rock, get the curves of the load of disc cutter of different diameter breaking rock and the curves of the stress exerting on the cutters when the disc cutters cutting different depth. According to the rock breaking mechanism of disc cutter, and established five kinds of disc cutter of different diameter broken rock finite element model, and the numerical simulation was carried out. The loads of disc cutters of different diameter breaking rock and the stress exerting on the cutters are different when the disc cutters cutting different depths. According to the result of the analysis, draw the curve graph of the load of disc cutter breaking rock and the stress exerting on the cutters when the disc cutters of different diameter cutting different depth. According to the curve diagram, the load of disc cutter of different diameter cutting a certain depth and the stress of exerting on the disc cutters can be gotten. The simulative result is instructive for improving the design of disc cutter parameters and improving the development efficiency.

Abstract: Reissners theory for cylindrical shell is adopted to analyze the axis-directional crack problem for FGMs cylindrical shell by using the asymptotic expansion method. The eigen-solution of the crack-tip fields for the cylindrical shell is obtained. The results are similar to Williams solution for the plane problems in homogeneous materials, and will be applied widely to engineering structures.

Abstract: Coal mine horizontal belt extension transfer machine is designed in order to solve the mine loading efficiency is not high; especially the most loading mechanical failed to solve continuous loading problem. This machine can also load a whole column tramcars and tramcars without modification with direct use, efficiency improve obviously. This paper first introduces transfer machine structure and working process, and introduces its important part tractor, structure and main function; Then as the main force of tractor parts, we frame for stress analysis, and set up the frame of 3-D model; Finally put the model into ANSYS of its structure statics analysis, and according to the result of analysis frame structure optimization. We will use the same approach to the design of tractor other components, finally complete the complete tractor. Through the study of tractor, summarizes the design methods for other similar mechanical similar provide a theory basis for the design.

Abstract: Reissners shell theory is employed to analyze the circumferential crack problem for FGMs cylindrical shell by using the asymptotic expansion method. The higher order crack tip fields for circumferential FGMs cylindrical shell which is similar to Williams solution are obtained.