Performance Of Spiral Groove Dry Gas Seal Research And Application

The reliability of compressor shaft end seals for production safety, stability, long period run and maximize economic benefits essential. The traditional shaft end seal labyrinth seal, floating ring sealing and contact type mechanical seal. In recent years, with the sealing technology unceasing development and the consummation, the emergence of a new type of seal, spiral groove dry gas seal.The sealing mechanism is:when the sealing side when there is a relative motion between the pumping effect, groove and the step effect makes gas produced fluid dynamic pressure seal, in two to establish a rigid film, thus ensuring the sealing end non contact, while the sealing medium is leakage control in an acceptable level. Compared with the traditional shaft end seal, spiral groove dry gas seal with medium leak less, wear small, low energy consumption, long service life and high reliability advantages. At present, the seal has been widely used for centrifugal compressor, centrifugal pump, gas turbine expander, and other high-speed high-pressure machine.According to the characteristics of dry gas seals and typical structure, the spiral groove dry gas seal structure and basic theory research. Using the existing mathematical model, the finite element method of spiral groove dry gas seal structure were calculated, the seal form and material is analysed, through specific calculation! Comparing studies of some good experiences and conclusion, for future technology of spiral groove dry gas seal to make work.In Tianjin tripod seal Limited import test bed of spiral groove dry gas seal system is studied. Completed the experimental equipment of dry gas seal testing system overall plan design, test system hardware configuration. The test of leakage, power and film axial stiffness, gives the gas seal test result, and compared with theoretical calculations approximate value comparison, error analysis. Experimental and numerical calculation results.