Combined hole-pattern damper seal with flanged damping holes

Abstract

A combined hole-pattern damper seal with flanged damping holes comprises a liner sealing cylinder, a middle sealing cylinder and an outer sealing cylinder which are arranged in a sleeving mode front inside to outside in sequence; the flanged damping holes distributed uniformly are formed in the circumferential surface of the liner sealing cylinder, and one end of the liner sealing cylinder forms arectangular flange through outward machining; the middle sealing cylinder is of a straight barrel type, and is provided with circumferential chutes distributed uniformly; the diameter of the dampingholes is not larger than the diameter of the chutes, and the center lines of the two holes coincide; and the outer sealing cylinder is a circumferential solid cylinder with one end forming a rectangular flange through inward machining; the three combined sealing cylinders are inlaid together, and auxiliary elastomer sealing rings are arranged at the inner end of the combination position between the liner sealing cylinder and the outer sealing cylinder. According to the combined hole-pattern damper seal, the seal leakage rate can be reduced, and the airtightness is improved; and the economy ofthe hole-pattern damper seal can be improved through a sealing stator surface which is easy to replace.

Description

Technical field [0001] The invention relates to the technical field of turbomachinery fluid sealing, and is suitable for shaft end sealing devices of various gas turbines, steam turbines, compressors and other turbomachines, and belongs to cylindrical sealing technology. Background technique [0002] The continuous improvement of the technical level of rotating machinery is closely related to the continuous improvement and structural update of the sealing device. At present, there are many types of seals for rotating and stationary parts, such as brush seals, labyrinth seals, honeycomb seals, hole-type damping seals, and bag-type damping seals. Among them, the labyrinth seal is the most commonly used sealing device in turbomachinery because of its relatively simple structure and low cost. The labyrinth seal relies on a series of expansion gaps and dissipation cavities formed between the sealing teeth and the rotor. When the leaking fluid flows through When the gap is expanded, p...

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the shortcomings of traditional labyrinth seals that are easy to fall and wear, overcomes the shortcomings of traditional honeycomb damping seals that are cumbersome to manufacture and expensive, and the typical defects of traditional hole-type damping seals that have poor flow disturbance effects, and provides a low-cost, It is easy to manufacture, and the flow blocking and turbulence effects are significantly improved compared with the above seals. A combined hole type damping seal with flanged damping holes

Images