Study On The Influence Of The Sealing Ring Structure On The Sealing Performance Of New Type Of Sealing Device

Mechanical seal is a kind of widely used in rotating shaft seal,widely used in pump,kettle,hydraulic drive and other similar equipment of rotating shaft seal.This paper studies a new type of mechanical seal device.Due to the deformation of the sealing device under working conditions,the media leakage in the sealing chamber is caused.Therefore,it is necessary to analyze the sealing performance of the device in order to understand the cause of seal failure.Firstly,the structure of the new mechanical seal device was analyzed,from which the interference fit between the seal ring and the ring seat,the connection between the ring seat and the gland,and the extrusion process of the seal groove and the ring were determined.The main research contents are as follows:(1)Only considering the influencing factors of interference in the interference fit between the sealing ring and the ring seat,the theoretical calculation of interference is carried out for the interference fit between the sealing ring and the ring seat in the Mosaic sealing ring structure,and the minimum interference value is obtained.The model is established and the finite element simulation analysis is carried out.The stress and deformation of the sealing ring and the ring seat in the sealing ring structure are obtained.The range of reliable interference is obtained.(2)Considering the multi-factor coupling analysis of the influence of screw preloading and interference on the sealing ring structure,the model was established and the finite element simulation analysis was carried out under the conditions of different screw preloading forces and interference.The effect of screw pretension on sealing ring structure is analyzed.By using the base hole system,the outer diameter tolerance of the sealing ring is optimized,which can reduce the surface machining accuracy of the sealing ring and meet the requirements of sealing performance.(3)The influence of the dimension parameters of the sealing groove on the contact stress between the sealing ring and the sealing end face was analyzed,and the optimal depth of the sealing groove was obtained.A new sealing groove structure is proposed to reduce the movement of the sealing ring and improve the phenomenon of excessive stress inside the sealing ring.