Study On Sealing Performance Of Ryrus Groove Seal In Low Temperature And Easy Vaporizing Medium

With the development of aerospace industry,the use of low-temperature and easily vaporized media has become more widespread.Because of its easy vaporization characteristics,phase transition is very likely to occur between the sealed end faces.At the same time,in the operating state,the end face is also easy to have a temperature difference,resulting in deformation of the end face,making the working environment of the seal more harsh,and put forward more stringent requirements on the sealing.According to this kind of situation,this article studies the Ryrus grooves non-contact seal performance of cryogenic easy vaporized medium ramification cell under temperature difference conditionThe temperature distribution of the surface of Ryrus grooves was calculated using the Steady-State Thermal module in the Workbench software.The Fluent module was used to calculate the flow field in the sealing surface of the Ryrus grooves.The Static Structural module was used to calculate the deformation of the sealing surface of the Ryrus grooves.Finally,with the coupling calculation of the seal temperature distribution,flow field pressure distribution and deformation of the sealing face,an accurate coupled numerical analysis model was obtained.The temperature distribution of the non-contact sealing face of the easily vaporized media and the deformation due to pressure and temperature were analyzed.The pressure distribution,velocity distribution and phase distribution of the fluid film between the sealing end faces were analyzed.A coupled numerical analysis model was used to analyze the effect of working pressure,rotational speed,and outlet temperature on the performance of the performance of the Ryrus grooves such as working film thickness,leakage rate,frictional power,and fluid film stiffness,obtaining the best scope for working.The influence of structural parameters such as deep groove depth,deep groove width,shallow groove depth,shallow groove width and number of grooves on the seal performance of the Ryrus grooves was analyzed,and a single parameter superior structure was obtained.Based on the orthogonal optimization method,the structural parameters of the non-contact sealing face of the Ryrus grooves were comprehensively analyzed,and the influence degree and the optimal combination of the parameters of the Ryrus grooves were obtained.The non-contact sealing and testing device of the Ryrus grooves was designed and manufactured.The performance of variable speed and variable pressure tests were verify the feasibility and numerical analysis of the designed non-contact seal of the Ryrus grooves.The conclusions obtained from this study can provide a certain theoretical basis and technical support for the design and application of such low-temperature easily vaporized media seals.