| Centrifugal hot oil pump is mainly used in liquid phase organic heat carrying system, and it is the power plant for forcing circulation of the system. As the development of technology and industry, and the more and more maturing application of liquid phase organic heat carrying technology in industry, organic heat carrying oven develops a lot and is largely used in application. As a reault, the need for hot oil pump is mounting. However, the solution of domestic demand for large-scale hot oil pump is mainly through importation. Therefore, to develop large-scale hot oil pump and realize the localization is very necessary.To begin with, the paper studies the principle of centrifugal pump, which provides theorybasis for the following work. Secondly, the impeller and volute are designed according to the rate coefficient method, and their hydraulic model are obtained. Then, using Solidworks,3dimentional spillway models of impeller and volute are established。By now, the design comes to the end, and then comes the numerical simulation of turbulent flow field of the centrifugal hot oil pump.Transform the three dimensional model to the format ".step", and import it to the pre-processing software Gambit of Fluent.In Gambit, the model is meshed and specified boundary types, then export ".mesh" file. After that, based on the RNG k-ε turbulent model, the flow field and temperrature field of the hot oil pump are computed. Through comparision the result of numerical simulation and theoretical analysis, the reliability of numerical simulation is guaranteed.As the temperature medium of hot oil pump is quite high, so is the requirement for the seal. The paper studies the sealing structures, sealing styles, and sealing materials, and introduces the welded metal bellow mechanical seal. Finally, a failure ananlysisis made, and come up with some solutions to the problem in combination with the existing research achievements, which provides reliable basis for the design and operation of hot oil pump. |
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