LABYRINTH SEAL AND GAS TURBINE

To provide a labyrinth seal capable of effectively suppressing the leakage amount of gas while allowing the response to assembly to insert a rotary body into a stationary body from the axial direction.SOLUTION: The labyrinth seal in one embodiment of this invention includes a first member having a plurality of seal fins arranged at spaces in the axial direction, and a second member opposed to the first member and having a radial clearance formed between each seal fin and itself, the second member being formed so that, when each seal fin is used as a reference, a part of the second member located on the downstream side further than the seal fin does not overlap with the seal fin in view from the axial direction, the second member having an inlet wall located on the upstream side further than the seal fin on the most upstream side and having a radial clearance formed between the first member and itself.SELECTED DRAWING: Figure 1 【課題】軸方向から回転体を静止体に挿入する組付けに対応可能であって、気体の漏れ量を効果的に抑制できるラビリンスシールを提供する。【解決手段】本発明の一態様に係るラビリンスシールは、軸方向に間隔をおいて配置された複数のシールフィンを有する第１部材と、前記第１部材に対向し、各シールフィンとの間に半径方向の隙間が形成された第２部材と、を備え、前記第２部材は、各シールフィンをそれぞれ基準としたとき、当該シールフィンよりも下流側に位置する前記第２部材の部分が、軸方向視において当該シールフィンと重複しないように形成されており、前記第２部材は、最も上流側のシールフィンよりも上流側に位置し、前記第１部材との間に半径方向の隙間が形成される入口壁を有している。【選択図】図１