GAP MEASUREMENT DEVICE FOR COMBUSTOR, AND GAP MEASUREMENT METHOD

The purpose of the present invention is to provide a gap measurement device (20) for a combustor (1) and a gap measurement method, with which the size of a gap between a first cylindrical body (2a) surrounding the periphery of a combustion nozzle, and a second cylindrical body (2b) which is connected to the first cylindrical body (2a) and which guides combustion gas to a down-stream side, can be measured when the combustor (1) is in an assembled state. This gap measurement device (20) for the combustor (1) is provided with: a rod member (30) which, in a state of being inserted inside the combustor (1), is attached to a first flange (1a) of the combustor (1), at least a base-end side of said rod member (30) being hollow; a support member (50) attached to a tip of the rod member (30) so as to be capable of rotating about a shaft core (55) orthogonal to the axial direction of the rod member (30); an imaging element (60) which is supported on the support member (50), and which images an annular gap (19); an operation lever (70) which passes through the inside of the rod member (30), and which extends towards the support member (50); and a link mechanism (80) which is provided between the operation lever (70) and the support member (50), and which converts back-and-forth movement of the operation lever (70) into rotational movement of the support member about the shaft core (55). La présente invention a pour objectif un dispositif de mesure d'espace (20) pour une chambre de combustion (1) et un procédé de mesure d'espace, grâce auxquels la taille d'un espace entre un premier corps cylindrique (2a) entourant la périphérie d'une buse de combustion, et un second corps cylindrique (2b) qui est relié au premier corps cylindrique (2a) et qui guide les gaz de combustion jusqu'à un côté aval, peut être mesurée lorsque la chambre de combustion (1) se trouve dans un état assemblé. Ce dispositif de mesure d'espace (20) destiné à la chambre de combustion (1) est pourvu : d'un élément tige (30) qui, dans un état d'introduction dans la chambre de combustion (1), est fixé à une première bride (1a) de la chambre de combustion (1), au moins un côté extrémité de base dudit élément tige (30) étant creux ; d'un élément de support (50) fixé à une pointe de l'élément tige (30) de manière à pouvoir tourner autour d'un cœur d'arbre (55) orthogonalement à la direction axiale de l'élément tige (30) ; d'un élément de formation d'image (60) qui est supporté sur l'élément de support (50),