Labyrinth sealing structure

Abstract

The invention belongs to the technical field of mechanical design, and particularly relates to a labyrinth sealing structure. The invention adopts the right-angled trapezoid tooth-shaped labyrinth sealing structure, and the labyrinth sealing structure is generally arranged as two parts of a left part labyrinth sealing structure and a right part labyrinth sealing structure; 15 grate teeth are arranged on each sealing body, the grate teeth are divided into two groups, and an annular space (1) is reserved between the two groups; and a plurality of radial through holes are uniformly distributed inthe circumferential direction of the annular space, and sealing gas is introduced from the radial through holes and flows to the left part labyrinth sealing structure and the right part labyrinth sealing structure. The labyrinth sealing structure has the advantages that the structure is simple, machining is easy, the assembly mode is simple and easy to operate, and the sealing effect is safe andreliable; and compared with a traditional sealing mode, the assembly allows a large dimensional space range, so that compared with a traditional sealing structure, the labyrinth sealing structure cannot be limited by the size of the part with the maximum diameter of a rotor assembly, a rotor subjected to dynamic balance does not need to be disassembled, and the assembly and sealing requirements of the sealing structure under a special occasion can be met.

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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