Abstract: A movable vacuum welding device (1) includes a vacuum chamber (7) having an edge section (12) opposite to a surface of a welding target (T) and forming a vacuum space between the surface of the welding target (T) and the vacuum chamber (7), a seal section (8) interposed between the edge section (12) and the welding target (T) throughout the entire circumference of the edge section (12), a welding head (9) configured to perform welding on the surface of the welding target (T) in the vacuum space, and a preload unit (10) configured to previously apply a load to the seal section (8). The seal section (8) includes a first seal member (27) formed of an elastic material and extending along the edge section (12), and a second seal member (28) disposed at at least a rear side in a relative moving direction in which a welding bead (W) passes and having higher flexibility than the first seal member (27).

Abstract: A bearing temperature monitoring device and bearing device provided with the monitoring device composed so that occurrence of scratch on the rotation shaft supported by the bearing caused by a bearing temperature carrying member integrated in the bearing such that its top end surface faces the rotation shaft, are provided.

Abstract: An oiling nozzle for a thrust bearing improves the following capability of pads and achieves a higher bearing pressure of the thrust bearing. The oiling nozzles are arranged between respective pads disposed in positions facing the thrust surface of a thrust collar that protrudes radially outward from a rotor shaft, along the circumferential direction. Each oiling nozzle has a cylindrical stem and a rectangular-shaped mainframe whose heightwise middle portions of opposite lateral sides are provided with convex parts. Each convex part presents a semicircular disk shape in a plane view to be fitted into concave parts that are formed in lateral sides of the pads. A top portion located on a side opposite to the stem is formed with a plurality of nozzle holes for ejecting lubricating oil that has been supplied from the bottom of the stem toward a space between the thrust collar and the pads.

Abstract: A journal bearing includes a bearing platform, a cylindrical bearing housing supported by the bearing platform via a plurality of load supporting members, a plurality of pads located swingable in the bearing housing so that a journal of a rotation shaft is supported by the pads, an oil supply mechanism for supplying oil to the bearing surfaces of the pads, and a connecting member which has an oil hole to communicate an oil supply passage in the bearing platform with an oil supply passage in the bearing housing so that oil is supplied from the bearing platform to the bearing surfaces of the pads. The connecting member carries a part of a bearing load exerted from the bearing housing, and is mounted such that the part of the bearing load carried by the connecting member is smaller than a bearing load carried by one of the load supporting members.

Abstract: A rotation shaft supporting structure has radial clearance between a bearing surface of an upper tilting pad and a rotating surface of the journal that can be adjusted so that a high pressure oil film is formed in the clearance and carryover of lubrication oil from an upstream pad to its adjacent downstream pad is prevented. Oil supply nozzles are mounted to the bearing housing to be located adjacent to the upstream and downstream side end of each bearing pad. An upstream side nozzle supplies lubrication oil to the bearing surface of the pad and a downstream side nozzle injects oil toward the journal surface to prevent carryover of lubrication oil from the bearing surface of the upstream pad to that of the downstream pad dragged by the rotating surface of the journal. The nozzles also serve as stoppers to prevent rotational movement of the pad.

Abstract: A bearing device (10) is provided with bearing pads (13) placed around a rotating shaft (3) to support a thrust collar (12) and carrier rings (15), each of which houses the bearing pads and is supported by a casing (20). And, a supported surface (15a) which is supported by the casing on the carrier ring is a curved surface which is raised at least along one direction orthogonal to the rotating shaft at a substantially constant curvature around the center of gravity (G) of the thrust collar.

Abstract: A journal bearing has a plurality of pad stops which include a first pad stop located at a most forward position in the rotation direction of the rotation shaft, and the pad stops other than the first pad stop function as oiling nozzles for releasing lubricating oil between the outer circumferential surface of the rotation shaft and the inner circumferential surfaces of the pads.

Abstract: A bearing temperature monitoring device and bearing device provided with the monitoring device composed so that occurrence of scratch on the rotation shaft supported by the bearing caused by a bearing temperature carrying member integrated in the bearing such that its top end surface faces the rotation shaft, are provided.

Abstract: To reduce the amount of lubricating oil released (supplied) between the outer circumferential surface of a rotation shaft and the inner circumferential surfaces of pads, so as to reduce the churning loss, and to reduce the bearing loss. The journal bearing comprises: a plurality of pads arranged radially inside a lower half-carrier ring at intervals, for receiving load from the rotation shaft; and a plurality of pad stops respectively arranged at the circumferentially opposite ends of the respective pads, for restraining circumferential movements of the respective pads, wherein, among these pad stops, the pad stops other than the pad stop located in the most forward position in the axial rotation direction of the rotation shaft have functions as oiling nozzles for releasing lubricating oil between the outer circumferential surface of the rotation shaft and the inner circumferential surfaces of the pads.

Abstract: Provided is an oiling nozzle for a thrust bearing, capable of improving the following capability of pads, and achieving a higher bearing pressure of the thrust bearing. An oiling nozzle which is for use in a thrust bearing and is respectively arranged between pads disposed in positions facing the thrust surface of a thrust collar that protrudes radially outward from a rotor shaft, along the circumferential direction, wherein the oiling nozzle comprises: a cylindrical stem; and a rectangular-shaped mainframe whose heightwise middle portions of opposite lateral sides are provided with convex parts each presenting a semicircular disk shape in a plane view, to be fitted into concave parts that are formed in lateral sides of the pads, and whose top portion located on the side opposite to the stem is formed with a plurality of nozzle holes for ejecting lubricating oil that has been supplied from the bottom of the stem toward a space between the thrust collar and the pads.

Abstract: A rotation shaft supporting structure with which the radial clearance between the bearing surface of an upper tilting pad on which self weight of the rotation shaft does not exert and rotating surface of the journal of the rotation shaft can be adjusted so that a high pressure oil film is formed in the clearance and carryover of lubrication oil from an upstream pad to its adjacent downstream pad is prevented.

Abstract: A journal bearing which can be constructed without leading to decrease in rigidity and increase in size, in which lubrication oil can be supplied to the bearing surfaces of the pads with certainty.

Abstract: A pump for carrying supercritical CO2 fluid or liquid CO2 capable of securing reliability by optimizing a bearing part. An angular ball bearing (8) comprises an inner ring (8a), an outer ring (8b), balls (8c) held therebetween, and a cage (8d) holding the balls (8c). Both the balls and the inner and outer rings are formed of a ceramic to form a totally ceramic bearing. Also, the cage (8d) is guided by the outer ring or the inner ring. Specifically, for example, when the cage is guided by the inner ring, the inner peripheral surface (8db) of the cage (8d) opposed to the outermost peripheral surface (8ab) of the inner ring (8a) is guided by the outermost peripheral surface (8ab) of the inner ring (8a).

Abstract: A pump for carrying supercritical CO2 fluid or liquid CO2 capable of securing reliability by optimizing a bearing part. An angular ball bearing (8) comprises an inner ring (8a), an outer ring (8b), balls (8c) held therebetween, and a cage (8d) holding the balls (8c). Both the balls and the inner and outer rings are formed of a ceramic to form a totally ceramic bearing. Also, the cage (8d) is guided by the outer ring or the inner ring. Specifically, for example, when the cage is guided by the inner ring, the inner peripheral surface (8db) of the cage (8d) opposed to the outermost peripheral surface (8ab) of the inner ring (8a) is guided by the outermost peripheral surface (8ab) of the inner ring (8a).