Thermal Stress Coupling Analysis Of The Agitator Single-Acting Mechanical Seal's Friction Pairs

Due to mechanical seals working reliably with less leakage,long life circle and wide-range applications,they are widely used in rotating machinery.In this paper,the single face mechanical seals for the agitator is regarding as the research object,and I studied it from the heat transfer mechanism,contact face liquid film,finite element simulation,etc.Finally,experimental had been carried out to be compared with the results obtained by the finite element simulation,and then I analyzed the differences and summarized the general pattern.First of all,this paper made a systematic study on the heat transfer of mechanical seals from main heat source and the principle of heat diffusion,and I found out that the internal heat source mainly came from the friction heat of the contact face,so I focused on finding a way to reduce the temperature of the seals of the contact face lubrication.Secondly,I studied the lubrication conditions of liquid film in mechanical seals contact face,established the liquid film Reynolds equation to take the surface roughness of the mixed lubrication conditions into account.Plus,I used Python programming to get the solutions on the seals under stable working conditions of the hydraulic film pressure distribution,friction coefficient and leakage.Then the overall axis symmetry calculation model of the mechanical seals ring had been established on the Ansys,and I analyzed the thermal coupling analysis of the mechanical seals ring to get the details on effects of the media pressure,speed,spring ratio pressure and material thermal conductivity on the mechanical seals ingress temperature field and stress field.I got the general regular curve from the result.Finally,the experimental result of mechanical seals contact face temperature changes and leakage volume has been compared and verified with the theoretical calculation under the same conditions.I analyzed and found out the reason of the errors,which may contribute to the subsequent research work.The experiment and the analysis results of finite elements keep an alignment,to a certain extent,verifying the accuracy of the theoretical results of this paper.The results of this paper can provide reference for the subsequent theoretical research and guide the design work on mechanical seals in engineering practice.