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The non - contact type mechanical seal of the sealing surface is spaced from the complete fluid film , the end face is in a non - contact state, with less wear, long life, low power consumption advantages . Studies have in-depth with the non-contacting mechanical seal , sealed during the operation in the presence of the phenomenon of contact friction attention . Seal face contact friction of very important significance for improving the performance of the non-contacting mechanical seal , extended seal life . The paper design the experimental structure of a method for detecting the contact friction of dry gas seal , vibration experiment measuring the dry gas seal during the operation of analysis of a typical vibration component , in order to determine the dry gas seal to the presence of contact friction . The experiment of dry gas seal structure transformation, excluding contact seals , water pressure fluctuations and external interference in vibration factors . Contact friction characteristic frequency analysis , confirmed that the dry gas seal end face contacts phenomenon exists . On the basis of the analysis of the experimental structure , it is proposed that the main reason for dry gas seal contact the angular deviation seal ring and stationary ring angular deviation , and the size of the angular deviation remains unchanged in the process of sealing run . By solving the steady-state Reynolds equation , dry gas seal gas film pressure distribution , the angular deviation of the dry gas seal performance . The study showed that the angular deviation of the seal faces local gas film pressures peak , affect the stability of the end face of pressure . Dry gas seal contact model , proposed measures to eliminate end-face contact , and to conduct a feasibility analysis in accordance with the characteristics of the contacts dry gas seal . The study shows that , through optimization of the sealing taper , adjusting the working parameters (e.g., speed , the sealing pressure of the medium , etc. ) can be eliminated for the dry gas seal contact .
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