Cooling device for casing support part of rotary machine, rotary machine, and cooling method for casing support part of rotary machine

A cooling method for a casing support part that cools a support part of a rotary machine that comprises:

• a rotating body including a rotating-body main body and a pair of rotor shaft ends fixed to both outer sides in a the shaft direction of the rotating-body main body;
• a casing accommodating the rotating-body main body and being penetrated by the rotor shaft ends;
• a bearing rotatably supporting the rotor shaft ends and having a bearing face being provided with lubricant fluid from a lubricant line;
• and the support part supporting the casing and comprising a protruding unit protruding from a main body of the casing, and a supporting base mounting the protruding unit thereon,
• the cooling method comprising cooling the support part through heat exchanging between the lubricant fluid and the support part;
• and providing with more lubricating fluid a part closer to the main body of the casing by using a plurality of branch pipes in the support part, the plurality of branch pipes are arranged in parallel with each other in a protruding direction of the protruding unit and are provided in the heat exchanger and are regulated so that the branch pipe closer to the main body of the casing is supplied with more lubricating fluid.