Heat Transfer Mechanism and Optimization of Circumferential Texture of Mechanical Seal

In this paper, the contact mechanical seal was taken as the research object. Considering the friction heat of the end face, a three-dimensional axisymmetric heat transfer model including the sealing ring and the seal chamber was established. The heat transfer analysis was carried out by Fluent software. The flow field, temperature field, velocity field and Nusselt Number (Nu) distribution of the sealing ring and the seal chamber were obtained. By analyzing the flow field, flow pattern and temperature field of the texture and its surroundings, the convective heat transfer mechanism of the texture was revealed. The influence of geometric factors such as depth-to-diameter ratio, row number, row spacing, arrangement and direction angle of the equilateral triangle texture on the temperature of the end face were studied, and the structural parameters of the equilateral triangle were optimized. The results showed that the texture of outer circumferential surface of the rotating ring enhanced the convective heat transfer and reduce the overall temperature of the sealing ring. The type, depth-to-diameter ratio, number and arrangement of the texture affected the heat transfer effect, among which the number of textures and the rotation angle had a great influence, and the triangular texture had a strong heat transfer ability, which provided a theoretical basis for the optimization design and application of high performance mechanical seals in the future.