| Belt conveyor, the most important equipment for bulk material transportation, is widely used in coal mines, power plants, ports, chemical plants, environmental plants, warehouses and other areas. Because of the limitation of traditional design method, belt conveyor has some problems, such as large consumption of energy resources, high safety factor, high cost, low-tech, serious environmental pollution, noise and vibration. The green design technology was applied to belt conveyor in this paper, with its environmental protection concept. Considering belt conveyor's attributes of environment resources, property and energy, the key technologies of belt conveyor green design, which consists of dynamic design, disassembly design and virtual design, were studied to save the cost, reduce the energy consumption, improve the reliability, alleviate environmental pollution in the conveyor's design, manufacture and use process。The main research content and the characteristics are as follows.1. The belt conveyer's dynamic characteristic is decided by conveyor belt's nature. Considering the conveyor belt's internal friction effect, a belt model with internal frictional element was proposed on the basis of the BERG model. And its computer model and simulation result were given, then validated by the experiment. Using discrete elements method, the system dynamic formula based on the belt model with internal friction was built and simulated. The result of dynamic simulation was consistent with the start work condition, what proved the correctness of the belt dynamic model and the feasibility of dynamic design for belt conveyor.2. The virtual prototyping of hydraulic automatic take-up device of belt conveyor was built on the theoretical basis of mathematical model that deduced by the power bond graph method. Then the virtual prototyping simulation study on take-up system's stability and rapidity was finished. The research indicated that the virtual prototyping of hydraulic automatic take-up device which had the same functionality as the physical prototype can substitute for the expensive prototype to carry on the experiment conveniently. And the different design proposals were tested to optimize hydraulic automatic take-up device by changing related parameters by changing the relevant parameters to save the energy material, reduce the design cost, enhance the system stability and the reliability. 3. The parts' disassembly determines the belt conveyor's maintainability in use process, reusability and recyclability after abandonment, which is the important part in the green design process. The drum, the key components of belt conveyor, was studied for disassembly design. In view of the ordinary integral drum's shortcomings at the present stage, a new detachable drum was proposed in this paper. And the results of its disassembling and performance evaluation show its good disassembly and reliability.4. Integrated the above key technologies, the basic steps of the belt conveyor green design was proposed, and a belt conveyor design was studied as an example in this paper. After the type-selection design, system dynamic analysis, parts of the virtual design, and disassembly design, the improved design proposal had saved the total cost approximately8.51%. The fuzzy analytic hierarchy process was applied to its green evaluation. As a conclusion, the green design of belt conveyor had a better environmental green degree than the original.
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