The invention relates to a magnetic rotation component (1) comprising a magnet component (4) that includes a permanent magnet, and a rotation component (5) that has an axis of rotation (r). In order to design the magnetic rotation component (1) in such a way that same has a simple structure and can be mounted easily and cost-effectively, the magnet component (4) and the rotation component (5) are arranged so as to be fixedly connected to each other by means of a flange (6). The magnetic rotation component (1) can be designed as an impeller (2).

An apparatus is provided that includes a rotor bore and a bore basket. The bore basket extends axially between a first and second axial ends. The bore basket includes an engagement panel, and cylindrical inner and outer radial panels. The inner and outer radial panels extend substantially between the first and second axial ends. The inner radial panel is disposed radially inside of and separated from the outer radial panel, defining an annular passage disposed there between. The bore basket includes a plurality of inlet apertures in fluid communication with the annular passage at a first axial position, and a plurality of exit apertures in fluid communication with the annular passage at a second axial position. The second axial end of the bore basket is attached to an inner radial hub of the rotor bore, and the rotor bore and bore basket are a unitary structure.

An apparatus is provided that includes a rotor bore and a bore basket. The bore basket extends axially between a first and second axial ends. The bore basket includes an engagement panel, and cylindrical inner and outer radial panels. The inner and outer radial panels extend substantially between the first and second axial ends. The inner radial panel is disposed radially inside of and separated from the outer radial panel, defining an annular passage disposed there between. The bore basket includes a plurality of inlet apertures in fluid communication with the annular passage at a first axial position, and a plurality of exit apertures in fluid communication with the annular passage at a second axial position. The second axial end of the bore basket is attached to an inner radial hub of the rotor bore, and the rotor bore and bore basket are a unitary structure.

A single-stage compressor device includes a housing and a rotating group with a shaft and a compressor wheel. The compressor wheel includes a front face and a back face. The front face cooperates with the housing to define a compressor flow path. A motor drives rotation of the rotating group within the housing. Furthermore, the compressor device includes a bleed system fluidly connected to the compressor flow path and configured to receive bleed fluid from the compressor flow path. The bleed system includes a bleed passage. At least a portion of the bleed passage is cooperatively defined by the back face of the compressor wheel and an opposing surface of the housing. The bleed system is configured to pass bleed air from the bleed passage, thereby alleviating thrust loading of the compressor wheel on the rotating group.

A combined bearing for a turbomachine is disclosed. The combined bearing comprises in combination: a radial bearing member, a thrust bearing member and a bearing-fluid impeller of a bearing-fluid boosting pump in fluid communication with the thrust bearing member and the radial bearing member.

A reflection mechanism is disposed above a rotor blade. A chamfered surface of the rotor blade is formed to gradually open wide by 0 to 10 degrees toward the downstream side in the rotational direction, from an imaginary line passing through a rotational direction-side tip end point of a horizontal surface and drawn parallel to a rotating shaft. In the reflection mechanism, inclined plates, inclined at a predetermined angle, are arranged radially in the radial direction from a central disc portion. A particle reflected on the chamfered surface of the rotor blade collides with each inclined plate of the reflection mechanism and is then re-reflected and falls in the downstream direction. Since the particle can securely be reflected toward the reflection mechanism, the particle can be prevented from exiting through an inlet port to flow back toward a chamber.

An electric blower includes: a motor including a rotary shaft; a first centrifugal fan fixed to a first end side of the rotary shaft; a second centrifugal fan fixed to a second end side of the rotary shaft opposite to the first end side; and a casing surrounding the motor, the first centrifugal fan and the second centrifugal fan. In the electric blower, first force applied by the first centrifugal fan to the rotary shaft in a first direction in an axial direction of the rotary shaft and second force applied by the second centrifugal fan to the rotary shaft in a second direction in the axial direction of the rotary shaft are opposite to each other during rotation of the rotary shaft.

An electric blower includes: a motor including a rotary shaft; a first centrifugal fan fixed to a first end side of the rotary shaft; a second centrifugal fan fixed to a second end side of the rotary shaft opposite to the first end side; and a casing surrounding the motor, the first centrifugal fan and the second centrifugal fan. In the electric blower, first force applied by the first centrifugal fan to the rotary shaft in a first direction in an axial direction of the rotary shaft and second force applied by the second centrifugal fan to the rotary shaft in a second direction in the axial direction of the rotary shaft are opposite to each other during rotation of the rotary shaft.

An electric compressor includes a rotation shaft, a compressor impeller, a rotor portion, a stator portion, and a motor housing. The motor housing includes an inner housing which includes a first cylindrical portion surrounding and holding the stator portion and an outer housing which includes a second cylindrical portion surrounding and holding the first cylindrical portion of the inner housing. An outer peripheral surface of the stator portion is in contact with an inner peripheral surface of the first cylindrical portion of the inner housing. An outer peripheral surface of the first cylindrical portion is provided with a first groove portion disposed to turn around an axis of the rotation shaft by one turn or more and the first groove portion includes a spiral groove portion.

A centrifugal well pump assembly has a non-rotating diffuser between upper and lower rotating impellers. The upper impeller has a cylindrical skirt on a lower side that rotates within a diffuser receptacle. The lower impeller has a cylindrical balance ring on an upper side that rotates within a diffuser cavity. Impeller sleeves are bonded to the skirt and balance ring. Diffuser sleeves are bonded to the diffuser receptacle and cavity. The diffuser sleeves are of a harder material than the impeller sleeves. Each of the impeller sleeves has upper, intermediate and lower circumferential rows of inserts. Each insert has a face flush with the impeller sleeve and is in sliding engagement with one of the diffuser sleeves. The inserts in the intermediate row may be rotationally staggered relative to the inserts in the upper and lower rows to create serpentine flow paths for well fluid leakage.