Air compressor for a vehicle having improved internal cooling efficiency by ensuring a circulation flow of compressed air for internal cooling and allowing the compressed air to sufficiently flow. The air compressor comprises: a housing with a compression unit for introducing and compressing air from outside; a motor unit which includes a rotor and a stator, and drives the compression unit to rotate according to the rotation of the rotor; a bearing unit supporting the rotor to be rotatable; a cooling circulation flow path formed inside the housing for moving, in an axial direction, some of the air compressed in the compression unit and circulating the air to the compression unit; and a bypass flow path which receives some of the air passing through the cooling circulation flow path and bypasses a partial region of the bearing unit to join the cooling circulation flow path.

The disclosure concerns a fan wheel, including a base body with a rotational axis, and a swing part. The base body is made of a first material and the swing part is made of a second material. The density of the second material and the density of the first material are different. The swing part has a surface. The swing part is at least partially surrounded by the base body, so that the base body covers at least 80%, in particular at least 90%, preferably at least 95% of the surface of the swing part. The first material has a first thermal expansion coefficient, and the second material has a second thermal expansion coefficient. The second thermal expansion coefficient amounts to 70% to 110%, in particular 80% to 100%, preferably 85% to 95% of the first thermal expansion coefficient, and/or the swing part is substantially annular and runs fully closed around the rotational axis.

A vertical member, which is preferably a support post used in a molten metal pump, includes a ceramic tube and tensioning structures to add a compressive load to the tube along its longitudinal axis. This makes the tube less prone to breakage. A device, such as a pump, used in a molten metal bath includes one or more of such vertical members.

An electrically and mechanically driven automotive accessory including a housing, an electric motor, a pulley, and a pulley assist mechanism. The electric motor comprises a stator assembly that is mounted to the housing and a rotating assembly that is mounted to a shaft. The electric motor creates a primary torque flow path that drives rotation of the rotating assembly relative to the stator assembly. The pulley is rotatable relative to the shaft and the rotating assembly. The pulley assist mechanism includes a plurality of circumferentially spaced teeth nested with a conductive body, a rotor body fixedly mounted to the shaft, and an electromagnet that is configured to induce a magnetic field between the circumferentially spaced teeth, the rotor body, and the pulley, which creates a secondary torque flow path between the pulley and the rotor body.

A submersible pump assembly includes an electric motor (1) and a centrifugal pump, which is driven by the electric motor (1). A rotor (4) formed of plastic or composite material which is manufactured in the extrusion or pultrusion method.

A water pump with an impeller driven by an electrical machine comprising a housing cap and a volute with an inlet) and an outlet and a boot hosting a stator and a rotor of the electrical machine, wherein the rotor is mounted on a fixed shaft in the water pump having a bushing rotatable mounted on the shaft.

A method for forming a blade for a gas turbine engine may include forming a suction side sheath and a pressure side sheath, a first cavity and a second cavity established on opposed sides of a rib, forming a structural core configured for positioning in an interior section of the blade between the suction side sheath and the pressure side sheath, the structural core including a first core member, a second core member and a root interconnecting the first and second core members, assembling the suction side sheath and the pressure side sheath with the structural core such that the first core member is positioned in the first cavity and such that the second core member is positioned in the second cavity, and securing the suction side sheath to the pressure side sheath to form the blade.

A pump front chamber automatic compensation device for improving closed impeller backflow is provided. The automatic compensation device is mounted on the inner wall surface of the pump body front chamber, extending from the inner wall surface of the pump body front chamber to the impeller front cover plate, stopping the flow of fluid from the impeller outlet to the pump front chamber. The automatic compensation device includes a spacer plate and a compensation feedback device. One end of the spacer plate extends into the pump front chamber, and the other end is connected to the automatic compensation assembly, through which the length of the spacer extension is automatically compensated. The pump front chamber automatic compensation device can prevent the fluid flowing out of the impeller outlet from entering the front chamber of the centrifugal pump, thus improving the operating efficiency and stability of the centrifugal pump.

Radial pump (1) comprising a stator (3) comprising an external stator (30) and an internal stator (32) defining an annular cavity (11) therebetween, and an impeller (5) rotatably housed between said stators (30; 32). The suction (7) is fashioned at a central portion of the internal stator (32), whereas the delivery (9) is fashioned at a radially external peripheral portion of the external stator (30). The impeller (5) comprises a plurality of deformable vanes (50, 51, 52) movable inside the annular cavity (11) and in slidable contact with the internal surface of the external stator (30). In every position of the impeller (5) with respect to the stator (3) at least two deformable vanes (51) are sealed in the portion of the annular cavity (11) between the suction (7) and the delivery (9) to isolate the delivery (9) from the suction (7). The impeller (5) is rotatable about a central internal axis (Al) offset with respect to the central external axis (AE) of the external stator (30), where the rotational eccentricity of the impeller (5) with respect to the external stator (30) determines a deformation of the deformable vanes (50, 51, 52) that contributes to the generation of flow rate of said pump (1).

Radial pump (1) comprising a stator (3) comprising an external stator (30) and an internal stator (32) defining an annular cavity (11) therebetween, and an impeller (5) rotatably housed between said stators (30; 32). The suction (7) is fashioned at a central portion of the internal stator (32), whereas the delivery (9) is fashioned at a radially external peripheral portion of the external stator (30). The impeller (5) comprises a plurality of deformable vanes (50, 51, 52) movable inside the annular cavity (11) and in slidable contact with the internal surface of the external stator (30). In every position of the impeller (5) with respect to the stator (3) at least two deformable vanes (51) are sealed in the portion of the annular cavity (11) between the suction (7) and the delivery (9) to isolate the delivery (9) from the suction (7). The impeller (5) is rotatable about a central internal axis (Al) offset with respect to the central external axis (AE) of the external stator (30), where the rotational eccentricity of the impeller (5) with respect to the external stator (30) determines a deformation of the deformable vanes (50, 51, 52) that contributes to the generation of flow rate of said pump (1).