A High Pressure Deformation Span-Scale Pore Texture Air Film Sealing Structure on Foil End Face

Abstract

A foil piece end face gas film seal structure of a high-pressure deformation trans-scale mold hole texture comprises a gas film sealed movable ring and a gas film sealed fixed ring; the seal end face of at least one seal ring in the movable ring and the fixed ring is an end face with a foil piece; the seal ring with the end face with the foil piece comprises a ring-shaped ring body, the annular foil piece and fastening screws; the outer side of the ring body is sunken at small magnitude to form a ring-shaped concave face; the inner side of the ring body protrudes at small magnitude to form a ring-shaped step; a sealing dam is formed on the upper surface of the ring-shaped step; the ring-shaped concave face is provided with a plurality of mold holes symmetrically distributed according to the rotating center, and the depth of the mold holes is at a micron level; the mold holes are evenly distributed in the circumferential direction to form mold hole ring belts; the mold holes are distributed in the radial direction to form mold hole columns; the outer common tangent line of the mold hole columns passes through the circle center of the ring-shaped concave face; sealing weir areas are formed between the mold hole ring belts or between the mold hole columns; the lower surface of the annular foil piece is tightly attached to the ring-shaped concave face of the ring body, and the upper surface of the annular foil piece is flush with the sealing dam; and the annular foil piece is fixed to the ring body through the screws.

Description

(1) Technical field [0001] The invention relates to the technical field of mechanical end face sealing structure design, in particular to a foil end face gas film sealing structure based on a cross-scale waviness deformation mechanism, which is especially suitable for shaft end sealing devices of high-pressure rotating machines. (2) Background technology [0002] As a form of gas-lubricated non-contact mechanical seal, the gas film end face seal is widely used in the shaft end seal of rotating machinery, such as compressors, pumps, reaction Shaft end seals of rotating machinery such as kettles and fans. As we all know, the waviness seal artificially processes the micron-level circumferential waviness on the end face of the sealing ring, with the help of the circumferential waviness to form a gas dynamic pressure effect, and finally opens the sealing end face to achieve non-contact, but the micron-level circumferential waviness is difficult to process and the processing cost ...

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the defect that the circumferential waviness of the sealing end face in the prior art is difficult to process and cannot change with the working conditions and membrane pressure after one-time processing and molding, and provides a kind of end face that is easy to form the circumferential waviness of the end face, can change with the membrane pressure and regulate the change of the membrane pressure so that Air film sealing structure on foil end face to achieve dynamic balance

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