Arrangement with a twist-lock coupling for a turbomachine combustion chamber

An arrangement for a turbomachine combustion chamber, the arrangement comprising a chamber end wall pierced by at least one substantially circular opening, an injector system associated with the opening, and a deflector mounted on the downstream side of the chamber end wall in the opening by means of an annulus, said injector system comprising:

• a pinch ring mounted on the upstream side of the chamber end wall and fastened against the annulus together defining an annular groove that is open towards the axis of the opening in the chamber end wall;
• and
• an annular bowl mounted in the opening in the chamber end wall;
• wherein said bowl is made up of at least two distinct parts, at least a first part forming an annular end plate suitable for sliding radially in the groove formed by the pinch ring and the annulus, and a second part forming a bowl collar that is provided with an annular collar extending parallel to the chamber end wall on its downstream side, said first and second bowl portions being fastened together by means of a twist-lock coupling.