Sealing piece for combustion chambers

The invention relates to the technical field of dry low-emission combustion chambers, and concretely relates to a sealing piece for combustion chambers, and solves the problems of the existing combustion chambers that it is difficult to satisfy the requirement of high outlet temperature. The sealing piece comprises a cooling wall with a front support boss, a back support boss and a turbulator which is arranged on the outer wall surface and between the front support boss and the back support boss, wherein the front support boss comprises a cooling air inlet, and the back support boss comprises a cooling air outlet; and a wave-shaped sealing piece which is arranged on the outer side of the cooling wall, wherein the peak part of the wave-shaped sealing piece is contacted with the inner side of a transition segment and tightly compressed by the transition segment. The sealing piece directly uses the turbulator on the cooling wall and the structure of the sealing piece is simplified, so that the sealing piece is easier to process, and simultaneously because the turbulence cooling replaces impact cooling, so as to properly reduce the flow speed of the cooling air flow, and equivalently the required amount of the cooling air of the sealing piece is reduced, so that more air is injected into the combustion area and the performance of the combustion chamber is improved.