A high-efficiency sealing structure applied between stationary casings

Abstract

The invention discloses a high-efficiency sealing structure applied between static casings. The static casing includes a static inner casing and a static outer casing which are oppositely arranged and have basically the same material properties but are in different temperature environments. One of the two opposite walls of the casing and the stationary outer casing is provided with an outwardly protruding sealing ring groove, which is filled with an annular elastic sealing material belt that can absorb thermal deformation, and the annular elastic sealing material The outer peripheral wall of the belt bears against the other of the two opposite walls, and the annular elastic sealing material band separates the space between the stationary inner casing and the stationary outer casing into a first chamber and a first chamber which are not in fluid communication with each other. second chamber. By adopting the above-mentioned structure of the present invention, the sealing effect of the contact gap of the contacting parts working in a high-temperature environment can be improved, especially the sealing effect of the cooling air flow in the chamber connected to the main channel, which can realize zero leakage and greatly improve the sealing effect .

Description

technical field [0001] The invention belongs to the field of impeller machinery such as ground gas turbines and aero-engines. Specifically, it relates to a high-efficiency sealing structure applied between static casings. By adopting the new sealing structure, the contact parts working in high-temperature environments can be improved. The sealing effect of the contact gap, especially the sealing effect of the cooling air flow in the chamber connected to the main channel, can achieve zero leakage and greatly improve the sealing effect. Background technique [0002] In turbomachines with high-temperature parts such as ground gas turbines and aero-engines, the parts at the high-temperature end are in a high-temperature environment during the operation of the turbomachinery, and the local temperature can even reach above 1300K. Obviously, when the parts are heated, they will produce swelling. Since the materials of various parts may be different, their expansion amounts are als...

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Problems solved by technology

But its disadvantages are also obvious. Due to the different deformations between parts, it will still bring very large thermal stress, which will reduce the life of the parts, or produce a large gap that cannot meet the sealing requirements, so this problem is only alleviated, and there is no Essentially solve the problem of sealing

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