The application of sealing ring for mechanical coating

which combines the characteristics of wearresistant coating with the characteristics of the toughness base material

depends on experience. There is a lack of research on its performance. A thermal structural coupling model consisting of rotating seal ring

stationary seal ring and stationary ring seat was established by using ANSYS software. It considers the influence of the coating surface deformation

the liquid film reverse pressure and the temperature between the sealing rings. The correctness of the analytical model is validated by the experiment. The influence of coating structure and material on the product of seal face pressure and maximum velocity ((PbV)max)

the seal face in the highest end temperature (Tmax)

coatings on the surface of the maximum tensile stress (σmax)

maximum shear stress of the main interface (τmax)

the interface maximum side effect of shear stress (σcmax) and the maximum tensile stress (τcmax) was analyzed

and the coating structure and material were determined. The results show that the coating thickness

the coating and the substrate of the thermal expansion coefficient and elastic modulus ratio mainly affect the coating surface of the maximum tensile stress. For the coating surface design the thermal expansion coefficient of coating and substrate should be more than 0.5

the spraying angle should be 15°-30°

the elastic modulus ratio should be below 2.5

and the coating thickness should be 0.4-0.6 mm.