A face seal structure with uniform cooling function

Abstract

The application belongs to the technical field of aero-engine case design, and relates to an end face sealing structure with a uniform cooling function. It includes a first casing and a second casing that are docked with each other, wherein the first casing has a bonding surface that is docked with the second casing, an inner ring surface facing the inside of the casing, and an outer ring surface that is opposite to the inner ring surface , the mating surface has a ring groove opened from the inner ring surface, and an outer groove extending radially from the ring groove to point A of the fitting surface, and a radially extending inward from the ring groove to the inside of the casing The inner groove, the first casing also includes a through hole extending from the outer ring to the point C in the first casing, connecting the cold air cavity at point A and point C, the inner groove is provided with a plurality of cold air along the ring direction, and the cold air from the outside passes through After the through hole, the cold air cavity and the outer groove enter the ring groove, they flow along the ring direction and enter the inside of the first casing through a plurality of inner grooves. The application realizes the circulation of cold air in the casing, and efficiently and uniformly cools the casing and the connection end surface.

Description

technical field [0001] The application belongs to the technical field of aero-engine case design, and in particular relates to an end face sealing structure with a uniform cooling function. Background technique [0002] The turbine casing is the structural connection part of the turbine stator on the aero-engine that passes through the turbine section. It usually plays an important role in bearing mechanical loads, gas pressure and thermal loads. Some turbine casings also directly or indirectly constitute the wall of the gas passage. Turbine casings of different stages are usually composed of several casings, which are connected by bolts and other means. [0003] For the connection end face of the casing, since this position is exposed to high-temperature gas, cracks are prone to occur at high temperatures, and the casing must be cooled. In order to realize the cooling of the end faces by the cold air, the existing design scheme is to reserve a gap between the two end faces...

AI Technical Summary

Problems solved by technology

However, due to the temperature change of the engine, the reserved gap will change, making the cold air flow uncontrollable. If the gap is too small, the cold air flow resistance will be too large, which will affect the cooling of the casing, causing the casing to overheat and even crack; if the gap is too small If the cooling air flow rate is too large, the engine performance will be reduced and the work efficiency will be reduced, which may lead to insufficient cooling of the casing or decrease the engine performance due to excessive cooling air flow

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