Abstract: A joint includes a housing and a refrigerant tube connected to a refrigerant source and communicated with a target part in a rotating machine. A rotating member is loosely fitted inside with the refrigerant tube and fixed to a rotary part of the rotating machine. A relatively rotating member has a fixed-side member and rotating-side member. The fixed-side member is connected to the refrigerant tube via a refrigerant tube extension section. The rotating-side member is connected to the rotating member via a rotating member extension section. A refrigerant zone is formed by spaces defined between the refrigerant tube and the rotating member, and between the refrigerant tube and rotating member extension sections. A sealing member is installed between the fixed-side and rotating-side members. A vacuum chamber and pressure chamber are defined within the housing.

Abstract: Problem to be Solved To provide a small, lightweight, cryo-rotary joint. Solution A joint includes a housing 2, a refrigerant tube 3 connected to a refrigerant source and communicated with a target part in a rotating machine, a rotating member 4 loosely fitted inside with the refrigerant tube and fixed to a rotary part of the rotating machine, and a relatively rotating member 5 having a fixed-side member 5a and rotating-side member 5b, wherein the fixed-side member is connected to the refrigerant tube via a refrigerant tube extension section 3a, the rotating-side member is connected to the rotating member via a rotating member extension section 4a, a refrigerant zone is formed by spaces 7 and 8 defined by the refrigerant tube, rotating member, and refrigerant tube and rotating member extension sections, a sealing member 10 is installed between the fixed-side and rotating-side members, and a vacuum chamber and pressure chamber are defined within the housing.

Abstract: A magnetizing device for superconductor and a superconducting synchronous machine are provided capable of constituting more compact and simple equipment that uses a superconductor as a magnet. The magnetizing device for superconductor includes a superconductor (131); a coolant chamber (142) for cooling the superconductor (131) down to or below a critical temperature at which the transition to a superconducting state occurs; coils (111, 111?) for generating a magnetic field equal to or higher than a critical magnetic field in which the intrusion of a magnetic flux into the superconductor (131) starts, around the superconductor (131) cooled down to or below the critical temperature at which the transition to the superconducting state occurs; and position modification means capable of arranging the superconductor (131) on a disk (120) and modifying the relative positional relationship with the coils (111, 111?).