Analysis Of Mechanical Seal Phase Transition Radisu And Temperature

As the important sealing device of rotating equipment, mechanical seal is widely used in petroleum chemical industry, papermaking, food, aviation and other industries. Scholars have done a quantity of mechanical seal researches. However, most researches of phase transition of sealed media between mechanical seal rings based on the experimental study, and a small amount of theoretical calculations can be only used in a narrow area and they are all based on many assumptions. This paper puts forward structure and thermal coupling method to calculate the phase transition radius of mechanical seal when the seal working steadily. This method can be used in a variety of mechanical seals.Based on the condition that micro-bulges on mechanical end seal face contact, this paper builds finite element model of mechanical seal and writes APDL language which combines result from the theoretical calculation and result from the structure analysis to do thermal analysis of model, and then obtains the phase transition radius of mechanical seal. Research on sealed media pressure, temperature, usage puv, mechanical seal loading coefficient and the width of mechanical seal ring end face influence mechanical seal temperature field, and then get the influence of phase transition radius between mechanical seal rings. Established the double end faces mechanical seal workbench and measured temperatures at different points of static ring. Theoretical calculation results and test results have good consistency based on the contrast.Based on the mechanical seal cooling auxiliary device projects in the standard "API682-2004Pumps-Shaft Sealing Systems for Centrifugal and Rotary Pumps", it analysed the appropriate use conditions of different project and analysed these projects influenced the temperature of mechanical seal by using FLUENT software. Contrast the results with mechanical seal without cooling auxiliary device and give choice reference to choose cooling auxiliary device for mechanical seal.By measuring the distribution of micro-bulge on the mechanical seal end face, obtained the true contact area of seal ring. Contrast the phase transition radius and thermal results by using the true contact area, the result by using nominal contact area and test results, find friction heat relates to the contact area.The results can be the basis of design, use, optimization of mechanical seal, it also can be the theoretical foundation for future research.