Meshing seal structure and aircraft engine with same

Abstract

The invention discloses a meshing seal structure. The meshing seal structure comprises a rotor blade and stator blades, wherein rotating teeth protruding towards the root parts of the stator blades are arranged on the root part of the rotor blade; and first-stage grooves matched with the rotating teeth are formed in the root parts of the stator blades, second-stage grooves are further formed in the first-stage grooves, and the rotating teeth, the first-stage grooves and the second-stage grooves form a meshing seal unit. According to the meshing seal structure, the motion direction of jet flowafter throttling is changed, the breathability effect is reduced, the change of the throttling position and throttling area of a tooth tip are directly influenced by the size of the meshing seal structure, the influence on labyrinth seal performance is great, the plate edge labyrinth leakage amount is reduced due to the meshing seal structure with the grooves, and a better seal effect is achieved;groove structural parameters are designed to follow the relationship of I=+ / -1.23h by the computational analysis and experimental verification, and the obtained seal effect is better.

Description

technical field [0001] The application belongs to the technical field of aero-engines, and in particular relates to a mouthpiece sealing structure and an aero-engine having the same. Background technique [0002] The mouth seal of the aero-engine / gas-turbine engine is a structure composed of the turbine guide vane, the cavity part below the root of the working blade and the upper part of the blade. It is a non-contact seal, which is used to prevent or reduce the mainstream high temperature. Gas enters the rim cavity between the rotating and stationary discs. [0003] like figure 1 As shown, the airflow passes through the rotor blade 10 and the stator blade 20 sequentially from left to right, there is a gap between the rotor blade 10 and the stator blade 20, in order to prevent the airflow from flowing into the gap, there is a gap between the rotor blade 10 and the stator blade 20 The mouthpiece sealing structure 30 passes the cooling gas from the inside to the main channel...

AI Technical Summary

Problems solved by technology

Normally, the mouthpiece sealing structure 30 is composed of an axial protruding tooth and a corresponding groove, but although this structure can prevent the inflow of airflow to a certain extent, it also makes the flow from the gap into the main channel to a certain extent The cooling gas interferes with the thermal flow in the main channel, affecting aerodynamic efficiency

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