A centrifugal compressor impeller includes a plurality of blades on a front side that extend from a first axial side to an outer radial end of the impeller. The centrifugal impeller includes a back side having a nonlinear backwall. The backwall can include a flat area hear a bore of impeller, a flat area near a tip of the impeller, and a convex surface between the flat areas of the bore and the tip. In some forms the impeller further includes a concave surface between the convex surface and the tip to form an s-shape. A transition or inflection point can denote the change from convex to concave. The convex and/or concave surfaces can take any variety of forms such as constant radius sections and/or compound curves.

A compressor impeller assembly is disclosed. The compressor impeller assembly may have a compressor impeller having an impeller bore. The compressor impeller assembly may further have an insert screwed into the impeller bore, the insert having a threaded insert bore. The compressor impeller assembly may also have a shaft having a threaded shaft bore. In addition, the compressor impeller assembly may have a stud. The stud may have a first threaded portion engaged with the threaded insert bore. The stud may also have a second threaded portion engaged with the threaded shaft bore.

A shaft clamp assembly has first, second and third members. Each member has respective first and opposite second ends, and an annular body extending between the ends. The second member has a radially outwardly extending flange at its first end, and a radially inwardly extending flange at its second end. The third member also has a radially inwardly extending flange at its second end. The first, second and third members are disposed concentrically in sequence, with a threaded portion of the first member being threadingly engaged with a corresponding threaded surface on the shaft, the second end of the first member presses against the second end flange of the second member, the first end flange of the second member presses against the first end of the third member and the second end flange of the third member presses against the object to thereby secure the object to the shaft.

Rotor structure for a turbomachine, such as a centrifugal compressor, is provided. Disclosed embodiments make use of structural and/or operational relationships (e.g., distinct axially-extending zones in the radially-inner contour of respective impeller bodies configured to balance mass distribution about a rotor axis) designed to control relative radial and/or axial growth between corresponding interface locations along the rotor axis at which corresponding faces of respective hirth couplings mesh with one another. The ability to control relative radial and/or axial growth between corresponding interface locations may be effective for reducing rotor vibration and/or to establish more reliable contact patterns and reduced levels of mechanical stresses and distortion (e.g., angular distortion) at the hirth coupling interfaces.

A multichannel air assembly (1000) for use with inflatable products with multiple inflatable chambers (C). Specifically, said multi-channel air assembly (1000) may be used to selectively inflate or deflate one or more chambers (C) of an inflatable product to varying pressures.

A turbocharger is provided including a turbine, a compressor and a bearing housing. A shaft is rotatably disposed within the bearing housing and extends into the turbine and the compressor. A bearing arrangement is disposed between the shaft and the bearing. The bearing arrangement includes a roller bearing formed between an outer bearing race element disposed in the bearing bore, and an inner bearing race element disposed in the outer bearing race element. A bearing retainer connected between the bearing housing and the compressor. An end portion of the bearing inner race element includes an integral oil slinger comprising a radially outward extending portion that slopes away from the shaft.

This fluid machine includes a motor housing, a rotating shaft which is inserted through the motor housing, an impeller which is mounted on a protruding portion of the rotating shaft, and a facing portion which faces the motor housing on a first end side in the axial direction. A first opening is provided on the first end side of the motor housing, a second opening is provided on a second end side of the motor housing, and an in-housing passage fluidly couples the first opening with the second opening. The fluid machine further includes an exhaust passage which is formed between the motor housing and the facing portion and which fluidly couples the first opening with external air, and a rotating blade which is disposed between the first opening and the exhaust passage, wherein the rotating blade is mounted on the rotating shaft and is rotatable with the rotating shaft.

A rotor for at least one of a turbine and a compressor of a supercharging device may include a shaft defining an axis of rotation and at least one impeller. The at least one impeller may have a thread which is arranged coaxially to the axis of rotation. The shaft may include a complementary thread which is arranged coaxially to the axis of rotation. The shaft and the at least one impeller may be secured together via the respective threads. The shaft and the at least one impeller may be fixed with respect to one another via at least one of a soldered connection, a welded connection, an adhesive bond, a clamped connection and a crystallization connection.

The present invention relates to a turbine engine comprising a wheel, (2) mounted on a shaft (4), and a disk (18), adjacent to the wheel (2) and mounted on the same shaft while being rotated by the latter. The disk (18) is made of a material having a density greater than that of the material used to manufacture the wheel (2). The invention is of use in a compressor/turbine.

This impeller is provided with: an impeller body formed in a disk-like shape and having a boss hole section formed therein, the boss hole section allowing a rotating shaft to be fitted therein; and compressor blades provided on the front surface side of the impeller body so as to protrude from the hub surface of the impeller body. The impeller consists either of a first resin member and a second resin member, which are engaged with each other and which consist of a resin, or of a resin member and a metallic member, which are engaged with each other.