Researches On Piston Ring Rotating Seal And Its Sealing Properties

In this paper, the properties of the piston ring sealing device are researched by theoretical and experimental methods. Establishing mathematical models of the leakage and sealing surface temperature and analyzing the result by computer simulation. Then carry out experimental studies by sealing property testing system, analyzing the datum acquired in the experiments and comparing it with simulation result. The researches in this paper mainly lie in the following aspects:(1) Introducing the mechanism, classification, selection and design principles of fluid sealing devices; explaining the evaluation criteria of these devices; introducing the researches history and status of rotating shaft sealing devices; pointing out the significance and background of the research.(2) Introducing the usage and principle of piston ring rotating seals; analyzing the contact stress surrounding the piston ring when it is installed and its influencing factors; discussing the issues should be considered in the design of the piston rings; Introducing the requirements to the materials of piston rings and the common selection; analyzing the advantages and disadvantages of piston ring rotating sealing device.(3) Introducing the performance evaluation standards of sealing systems; by analyzing the factors leading to leakage and the leakage channels of piston ring sealing device, figure out the volumes of static and dynamic leakages; analyzing the factors lead to the leakage of piston ring rotating sealing devices, the factors contain pressure, the height of sealing surface, viscosity of the oil and the speed of rotation axis; introducing the hazards of the temperature enhancement in sealing surface; by the means of theatrical analysis and simulation, discussing the effects of rotating shaft speed and medium pressure in the system to temperature raising in sealing surface.(4) Introducing the principle, structure, test item and flow of piston ring test system; analyzing the structure and hardware selection principles; pointing out the components of application software; analyzing the static, dynamic leakage and temperature data, then comparing the experiment results with theoretical analysis.(5) Concluding research work and further research is recommended.