A double-sealed connection structure between the combustion chamber flame tube and the transition section of a gas turbine

Abstract

The invention provides a double-seal connection structure of a flame tube and a transition section of a combustion gas turbine combustion chamber, and relates to the structural design of the combustion gas turbine combustion chamber. The double-seal connection structure comprises the flame tube, the transition section and a seal structure; the flame tube is inserted into the transition section, a combustion flow channel is defined by the inner wall surface of the flame tube and the inner wall surface of the transition section together, and the seal structure is arranged between the flame tube and the transition section; the seal structure comprises a seal supporting part, a front elastic seal part and a rear elastic seal part. According to the double-seal connection structure, due to the fact that the structural mode of the front elastic seal part and the rear elastic seal part and a correspondingly suitable channel cooling structure are utilized, cold air passes through a cooling channel and a seal cavity and cools the flame tube, the transition section and the seal structure respectively, and the seal structure between the flame tube and the transition section can achieve the double functions of sealing and cooling. The two-level elastic seal parts reinforce the seal function of the seal structure, and therefore the cold air can be controlled more easily when passing, and possibility of complete failure caused by abrasion of single elastic seal parts is reduced.

Description

technical field [0001] The invention relates to the structural design of a combustion chamber of a gas turbine, in particular to a sealing structure connecting a combustion chamber flame tube and a transition section, and belongs to the technical field of power equipment. Background technique [0002] Gas turbine is an indispensable major power equipment in the energy field. As one of the three core components of a gas turbine, the combustion chamber is tasked with heating the working fluid, converting the chemical energy of the fuel into the thermal energy of the high-temperature gas, forming a gas whose temperature and temperature field meet the requirements, and then sending it to the turbine for work. . The structure of the combustion chamber generally includes components such as the shell, the spray group, the flame tube and the transition section, and the connecting part of the flame tube and the transition section is usually provided with a sealing structure. [000...

AI Technical Summary

Problems solved by technology

In this technical solution, although the amount of air passing through the elastic seal of the sealing structure is very small, there is still cold air passing through and it is not easy to control, and the elastic seal is easy to wear, and its damage will directly affect the life of the combustion chamber and the maintenance cycle Wait

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