Research on the influencing factors and improvement design of the working clearance of floating ring seal

The main influencing factors of the working clearance of the floating ring seal were analyzed in this paper, an efficient and accurate method of calculation was proposed for the radial displacement of the graphite ring, which can provide guide for structure improvement and accurately control the radial displacement of the graphite ring in the process of structure design. Improvement design was carried out on a certain floating ring seal, reducing the variation of the working clearance of the floating ring seal during changes in working conditions. After improvement, the sealing clearance of the floating ring seal decreased from 0.037–0.053 mm to 0017–0.028 mm at sealing gas temperatures of 100 °C–200 °C. With pressure differentials of 0.02–0.2 MPa, the leakage of the floating ring seal decreased by 35.4%–89.6%.