Abstract: A rotating shaft is supported by journal bearings that can support without contacting the rotating shaft itself. Then, one end of both shaft end portions of the rotating shaft has a main impeller installed and the other end is provided with a sub impeller. By utilizing a force being generated by rotation of the main impeller, liquid being pumped (fluid being pumped) is sucked in through a suction port and discharged through a discharge port. On the other hand, by utilizing a force being generated by rotation of the sub impeller, fluid is transported to the journal bearings, thereby having the journal bearings support the rotating shaft.

Abstract: In order to optimize the clearances between both end surfaces of a sleeve 5 and each of the end surfaces of the fixed bodies 3 and 5, respectively, magnetic forces of repulsion being caused by each of the permanent magnets 3a, 5b, 5c and 8a is adjusted. At this time, by adjusting each of the distances between the permanent magnets 3a, 5b, 5c, 8a, respectively, by adjusting the quantity of the adjustment rings 9, the magnetic force of repulsion being caused by each of the permanent magnets 3a, 5b, 5c and 8a is adjusted.

Abstract: By inserting a protruding portion 8b, which is installed to a center position of a rear end surface 8x of a fixed body 8, into a hole 4a, which is provided to a center position of an end surface 4x on a side of a fixed body 8 of a fixed shaft 4 that is connected to a fixed body 3, the fixed bodies 3 and 8 and the fixed shaft 4 are connected. As a result, a sleeve 5 can be removed only by dismantling the fixed body 3.

Abstract: An artificial cardiac pump includes an impeller (3) rotatably supported on a fixed shaft body (2) in a housing (1) and a drive mechanism rotating the impeller, wherein blood is taken in from the front side and force-fed to the rear side by the rotation of the impeller (3). The shaft body (2) is connected between a front side fixed body (5) fixed to a straightening plate (4) joined to the housing (1) at the front of the impeller (3) and a rear side fixed body (7) fixed to a diffuser (6) joined to the housing (1) at the rear of the impeller (3). The impeller (3) further includes a sleeve (8) having an inner peripheral surface opposed to the outer peripheral surface of the shaft body (2) through a minute clearance and front and rear end faces opposed to the rear end face of the front side fixed body (5) and the front end face of the rear side fixed body (7) through minute clearances, and an impeller (9) joined to the outer peripheral surface of the sleeve (8).

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: In a pump conveying a supercritical fluid or a liquid are provided stator slots and motor mold members which are charged between the stator slots, so as to have a stator can of a motor driving the pump from the outside thereof. Additionally, by providing a main shaft of a motor driving the pump and bearings supporting the main shaft with clearance-fitting and by tightening inner rings of the bearings to the main shaft in an axial direction, the bearings are fixed to the main shaft.

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 rotating shaft is supported by journal bearings that can support without contacting the rotating shaft itself Then, one end of both shaft end portions of the rotating shaft has a main impeller installed and the other end is provided with a sub impeller. By utilizing a force being generated by rotation of the main impeller, liquid being pumped (fluid being pumped) is sucked in through a suction port and discharged through a discharge port. On the other hand, by utilizing a force being generated by rotation of the sub impeller, fluid is transported to the journal bearings, thereby having the journal bearings support the rotating shaft.

Abstract: In a pump conveying a supercritical fluid or a liquid are provided stator slots and motor mold members which are charged between the stator slots, so as to have a stator can of a motor driving the pump from the outside thereof. Additionally, by providing a main shaft of a motor driving the pump and bearings supporting the main shaft with clearance-fitting and by tightening inner rings of the bearings to the main shaft in an axial direction, the bearings are fixed to the main shaft.

Abstract: An axial-flow pump employs an increased boss ratio Dh/Dt, wherein Dh is the hub diameter of a rotary shaft of a rotor, and Dt is the tip diameter of impeller vanes of the rotor. Specifically, the boss ratio is 0.65 to 0.85, preferably 0.7 to 0.8.

Abstract: An automatic inspection system detects foreign materials included in a sheet of transparent or translucent resin material such as a polyethylene compound. The automatic inspection system comprises an extruder for extruding a resin material into a sheet, means for withdrawing the extruded sheet along a path of travel, means disposed between the extruder and the withdrawing means for permitting the sheet to having down by gravity into a U-shape, sensor means for detecting a vertical position of the U-shaped portion of the sheet, controller means for adjusting the speed of sheet withdrawal for the withdrawing means in response to the output signal from the sensor means, a source of light disposed on one side of the path of travel of the sheet, an image sensor camera disposed on the other side of the path of travel of the sheet in confronting relation to the source of light for receiving light emitted from the source of light and having passed through the sheet to detect foreign materials included in the sheet.