A labyrinth seal structure

Abstract

The invention belongs to the technical field of mechanical design, in particular to a labyrinth sealing structure. The present invention adopts a right-angled trapezoidal tooth-shaped labyrinth seal structure, which is generally set as a left and right two-part labyrinth seal structure, and 15 comb teeth are arranged on the seal body, which are divided into 2 groups, and an annular space (1) is left between the 2 groups. A number of radial through holes are evenly distributed along the circumferential direction, and the sealing gas flows from here to the left and right parts of the labyrinth sealing structure; the sealing structure has the advantages of simple structure, easy processing, simple and easy assembly, and safe and reliable sealing effect. Advantages, and compared with the traditional sealing method, the allowable size space range is larger, so compared with the traditional sealing structure, it is not limited by the size of the maximum diameter of the rotor assembly, and there is no need to disassemble the dynamically balanced rotor, which can meet the sealing structure in special occasions Assembly and sealing requirements.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, in particular to a labyrinth sealing structure. Background technique [0002] The labyrinth seal is a series of annular sealing teeth arranged in sequence around the rotating shaft. A series of interception gaps and expansion cavities are formed between the teeth. The sealed medium produces a throttling effect through the gaps of the tortuous labyrinth to achieve the purpose of leak prevention. . It is suitable for gas sealing under the conditions of high temperature, high pressure, high speed and large size. In the traditional labyrinth seal structure, it is generally an integral ring structure. When assembling, it can only be penetrated from one end of the shaft. The diameter of the seal is limited by the maximum diameter of the shaft; and in order to ensure the sealing effect, it is necessary to The sealing parts need to be replaced regularly, and the integral structure is not easy...

AI Technical Summary

Problems solved by technology

In the traditional labyrinth seal structure, it is generally an integral ring structure. When assembling, it can only be penetrated from one end of the shaft. The diameter of the seal is limited by the maximum diameter of the shaft; and in order to ensure the sealing effect, it is necessary to The sealing parts need to be replaced regularly, and the integral structure is not easy to disassemble; in special cases, the diameter of the rotor shaft end is larger than the diameter of the sealing part, or it is difficult to disassemble the rotor after dynamic balance, the traditional integral sealing structure cannot be assembled, and a design is required Labyrinth seal structure to meet the assembly and sealing requirements of products or institutions

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