A shaft assembly for use with a turbine engine includes a shaft and a magnetic mode control unit. The shaft extends along an axis and is configured to rotate about the axis. The magnetic mode control unit is configured to control deflection of the shaft as the shaft rotates about the axis.

A vacuum pump and a damper for the vacuum pump are provided so as to increase vibration isolation in a twisting direction with a simple structure and prevent rupture of an O-ring and an elastic member by regulating a misalignment of flanges facing each other. Provided are a first flange and a second flange, each having a central opening, the flanges being shaped like rings opposed to each other; an O-ring and an intermediate ring that are disposed between the first flange and the second flange; O-rings disposed between the first flange and the intermediate flange and between the intermediate ring and the second flange; a plurality of elastic members that are disposed between the first flange and the second flange and are spread in the circumferential direction of central openings; and airtightness keeping means including positioning pins inserted into positioning holes sequentially provided on the first flange, the intermediate ring, and the second flange.

The motor support (16) for a motor-fan unit of a ventilation installation for a vehicle comprises: two coaxial rings (20; 22), including an inner ring (20) capable of receiving one or more elements of the motor and an outer ring (22) capable of fixing fastened to a housing forming a structural element, a decoupling element (24) between the two coaxial rings (20; 22); and a means (44) for limiting the relative movement of one of the two rings (20:22) relative to the other, in a plane normal to the common axis (A) of the two rings (20; 22) comprising at least one radial abutment (44) fastened to one of the two rings (20; 22), with a radial clearance between the radial abutment (44) and the other of the two rings (20; 22).

A lightweight impeller is provided for use in a pressurised gas source for a CPAP or other breathing assistance apparatus. The impeller can be shroudless or otherwise lightweight.

A ceiling fan module with an energy dissipation function and a configuration method thereof are disclosed. The ceiling fan module includes a fan rack, a fan and an energy dissipation assembly. The energy dissipation assembly passes through the fan rack and the fan and connects the fan rack and the fan; the energy dissipation assembly includes steel cables (3), high-damping vibration attenuation rings, fasteners and balancing weights; two high-damping vibration attenuation rings are sleeved on one steel cable, and the two high-damping vibration attenuation rings are respectively located at two ends of the steel cable; the high-damping vibration attenuation rings are mounted on the fan rack and the fan and separate the fan rack from the fan; the fasteners are mounted on the steel cables and are located on outer sides of the high-damping vibration attenuation rings and the fan rack .

A blower includes a rotor, a motor adapted to drive the rotor, at least one bearing to rotatably support the rotor, a stationary component, and a bearing sleeve provided to the stationary component. The bearing sleeve is structured and arranged to support and retain the bearing to the stationary component. The bearing sleeve comprises an elastomeric material, and the bearing sleeve comprises one or more bumps or ribs configured to engage along an outer ace of the bearing.

A heat dissipation fan includes a fan blade assembly. The fan blade assembly includes a plurality of fan blades and a plurality of silencers connected to the plurality of fan blades and evenly arranged along a rotation direction of the plurality of fan blades. A center of gravity of the plurality of silencers coincides with a rotation center of the heat dissipation fan. At least some fan blades of the plurality of fan blades have different contact surfaces with air.

Disclosed is a motor (14) for a ventilation device (10) of a heating, ventilation and/or air conditioning system of a motor vehicle, comprising a base (34) for mounting the motor (14) on a support (16); a stator (22); a rotor (20) comprising a shaft (30); at least one bearing (74; 80) around the shaft (30) of the rotor (20); and a decoupling ring (58). The decoupling ring (58) comprises an outer part (60) secured to the mounting base (34), an inner part (62) secured to the stator (22) and forming a recess (72; 76) for receiving the bearing (74; 80) around the shaft (30) of the rotor (20), and elastomer material (64) between the inner part (62) and the outer part (60).

The present invention relates to damping devices of an electric motor of an airflow generating apparatus and the apparatus having these devices, the devices having a first part, a second part, and a damping element, the damping element being arranged such that it determines an attachment between the first part and the second part, and having at least one central wall having two longitudinal ends. At least one of the two longitudinal ends of the at least one central wall is defined to form an angle with respect to the first part such that an imaginary transverse surface containing the at least one of the two longitudinal ends can be defined parallel to an imaginary joining line (A) between a center of masses of the at least one central wall and a center of gravity of the electric motor.

A fan structure including a center portion, multiple fan blades, and a fixing ring is provided. The center portion includes a bottom surface and a center shaft. The center shaft is perpendicular to the bottom surface, and the direction in which the center shaft extends is an axial direction. The fan blades are mutually separated and connected to the bottom surface of the center portion and are disposed around the axial direction. Each of the fan blades has a height which is parallel to the axial direction. The fixing ring simultaneously contacts the side of the fan blades which is away from the center shaft. Along the axial direction, with the bottom surface of the center portion as a reference surface, the fixing ring is disposed at a range of 40% to 80% of the height of each of the fan blades.