Nonuniform controllable cavity rotary sealing structure

Abstract

The invention discloses a nonuniform controllable cavity rotary sealing structure. The sealing structure is a sealing stator used for being mounted on a rotating part in a sleeving mode and comprisesa hole-type sealing cavity and an annular pressure stabilizing cavity both formed in the inner surface of the sealing stator. The processing section of the hole-type sealing cavity can be circular, oval or hexagonal, and the annular pressure stabilizing cavity is through in the circumferential direction. The hole diameter and hole depth of the hole-type sealing cavity are changed according to a set rule in the axial direction and the circumferential direction, and the changing rule can be a linear type, a quadratic curve type, a cosine curve type and a B-spline curve type. The inner surface ofthe sealing stator is divided into a plurality of independent sealing sections by the annular pressure stabilizing cavity, and the sealing sections can independently regulate and control the hole diameter and the hole depth of the hole-type sealing cavity. Fine regulation and control over the magnitude and symbols of sealing power characterization factors (rigidity and damping) can be realized, the sealing power characterization is improved, and the impeller mechanical shafting stability is improved.

Description

technical field [0001] The present invention relates to a rotary sealing structure, in particular to a non-uniform controllable chamber used in the shafting of a turbomachinery, which has the functions of controlling leakage, suppressing vibration and increasing stability, and meets the requirements of refined controllable adjustment of stiffness and damping of the shafting of a modern turbomachinery Rotary seal structure. Background technique [0002] The working fluid leakage between the rotating part and the stationary part in the turbomachinery is one of the main sources of loss. The rotating seal can control the leakage flow from the high-pressure area to the low-pressure area through the dynamic and static gap, effectively reducing the amount of leakage and the impact of the leakage flow. The effect of the mainstream has a significant effect on the operating efficiency of the turbomachinery. While the rotary seal controls the leakage flow of the working fluid, due to ...

AI Technical Summary

Problems solved by technology

This is mainly due to the fact that traditional honeycomb seals, hole-type seals and bag-type seals and other damping and sealing structures often take the maximum effective damping as the design goal, while ignoring the effective stiffness, and it is impossible to achieve fine control of effective damping and effective stiffness. The overall effective damping and effective stiffness of the shafting deviate from the stable operating range

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