Abstract: A rotary machine including a rotary shaft rotatably disposed in a casing is provided. The rotary machine includes an end plate disposed at one end side of the casing in the axial direction. The rotary machine includes a recess section formed in the end plate and recessed toward the inside of the casing. The rotary machine includes a through hole formed in the recess section and through which one end section of the rotary shaft is inserted. The rotary machine includes a shaft grounding device which is provided in the recess section. The shaft grounding device is brought into contact with the one end section of the rotary shaft which is inserted through the through hole, and eliminates a shaft voltage generated in the rotary shaft.

Abstract: This rotary machine (1), provided with a rotary shaft (40) rotatably disposed in a casing (30), comprises: an end plate (35) disposed at one end side in the axial direction of the casing (30); a recess section (35a) formed in the end plate (35) and recessed toward the inside of the casing; a through hole (35b) formed in the recess section (35a) and through which one end section (41) of the rotary shaft (40) is inserted; and a shaft grounding device (70) which is provided in the recess section (35a), is brought into contact with the one end section (41) of the rotary shaft (40) which is inserted through the through hole (35b), and eliminates a shaft voltage generated in the rotary shaft (40).

Abstract: A lubricating oil passage structure for a bearing of an oil cooled rotating machine includes a bearing (114) arranged in the center of a bracket (111) to rotatably support a rotary shaft (101). Protruding ribs (116, 117, 117a) are spirally arranged on the inner surface of the bracket (111). Also, a bearing rib (112) having an oil passage groove (113) for supplying the bearing (114) with lubricating oil is formed on the inner surface of the bracket (111). An upper projection hole (110) is formed in the upper portion of the bracket (111) for introducing the lubricating oil. The protruding ribs located on the right and left of the upper projection hole (110) in the circumferential direction are the upper protruding ribs (116) which function as guides for guiding the lubricating oil to the bearing rib.

Abstract: A lubricating oil passage structure for a bearing of an oil cooled rotating machine includes a bearing (114) arranged in the center of a bracket (111) to rotatably support a rotary shaft (101). Protruding ribs (116, 117, 117a) are spirally arranged on the inner surface of the bracket (111). Also, a bearing rib (112) having an oil passage groove (113) for supplying the bearing (114) with lubricating oil is formed on the inner surface of the bracket (111). An upper projection hole (110) is formed in the upper portion of the bracket (111) for introducing the lubricating oil. The protruding ribs located on the right and left of the upper projection hole (110) in the circumferential direction are the upper protruding ribs (116) which function as guides for guiding the lubricating oil to the bearing rib.