Abstract: A fan bracket and the fan fixing apparatus using the same are disclosed, in which the fan bracket, including a pair of fixing members, is used for fixing a fan assembly inside a housing. Each fixing member has a first panel and two positioning elements, in which the first panel is configured with a first end, a second end and a first side in a manner that the first and the second ends are located opposite to one another while enabling the first side to be located between the two ends. In an embodiment, there is at least one fixing plate disposed on the first side that each fixing plate has at least one first screw hole. Moreover, the two fixing members are symmetrically and respectively disposed at the first and the second ends of the first panel whereas each fixing member is configured with a second screw hole.

Abstract: A fan frame includes a housing (10), a supporting base (20) and a plurality of ribs (30) connecting the housing with the supporting base. One of the ribs includes a bottom wall (33), and first and second lateral walls (31, 32) extending from two opposite sides of the bottom wall, respectively. A receiving groove (35) is defined between the bottom wall and the lateral walls. A securing tab (40) extends from an outer end of the first lateral wall towards the second lateral wall. A securing finger (42) extends aslant from a free end of the tab towards the second lateral wall. A slot (50) is defined between the finger and the second lateral wall with a width thereof gradually decreased inwardly. The tab, the finger, the bottom wall and the first lateral wall cooperatively define a gap (45) therebetween for extension of power wires (60) of the fan.

Abstract: A casing assembly for a compressor where traditional inlet and discharge nozzles are replaced with a mounting surface created from weld filler or weld material applied to the outside surface of a casing. The weld material and a portion of the outside surface of the casing are cooperatively milled to create a generally planar or flat surface having a casing conduit centrally-disposed therein. A flange may then be coupled to the flat surface for the inlet or discharge of a process gas.

Abstract: The invention concerns a method of mounting a compressor block on a front side of a stator of an electric motor that comprises a stator bore and a stator axis, a support face arrangement of the compressor block being mounted on a contact area of the stator front side and the compressor block being connected to the stator. It is endeavoured to manufacture a compressor arrangement with a high efficiency. For this purpose, before mounting the compressor block (2) on the contact area (21, 22), the stator (4) is acted upon with a clamping force corresponding to a mounting force, a spatial deviation of the contact area (21, 22) from a plane, to which the stator axis (17) is perpendicular, is determined, the support face arrangement is machined so that the deviation is compensated, and the compressor block (2) is connected to the stator (4).

Abstract: A turbocharger has a rotor housing. Said rotor housing has an insertion element. Said insertion element is configured such that the same forms an over-hanging spiral together with said rotor housing.

Abstract: A blower for an electronic device includes a fan frame having an opening through which air passes for cooling the electronic device; a blade arranged in the opening of the fan frame; a motor configured to rotationally drive the blade; an attachment portion provided outside the opening of the fan frame, the attachment portion causing the fan frame to be attached to the electronic device; and a holder fixed to the electronic device and holding the attachment portion in a direction perpendicular to a rotational axis of the blade.

Abstract: An exhaust gas turbocharger includes a waste gate valve and an adjusting device for adjusting the waste gate valve. The adjusting device is connected to the waste gate valve and disposed on a housing of the exhaust gas turbocharger. The adjusting device is fastened to the housing of the exhaust gas turbocharger via an adjusting template.

Abstract: The invention relates to a nacelle (1) for a turbojet engine, comprising: —an air intake structure able to channel a flow of air towards a fan of the turbojet engine and comprising at least one longitudinal outer panel (40) incorporating an air intake lip (4a), —a middle structure (5) intended to surround the said fan and to which the air intake structure is attached in such a way as to ensure aerodynamic continuity, —at least one inner panel (41) comprising an acoustic shroud (53), fixed at its downstream end to an upstream end of the middle structure (5) forming therewith a fixed structure of the nacelle (1), and —means (15) of guiding the outer panel or panels (40) which means are able to allow a substantially rectilinear movement of the outer panel (40) in the upstream direction of the nacelle (1) so as to be able to open the air intake structure, the said nacelle (1) comprising reinforcing means (90) designed to react the mechanical loads of the guide means (15) beyond a predetermined deformation thereof

Abstract: A fan includes an impeller, a motor, a circuit board, a fan frame and a connecting member. The motor is used to drive the impeller to rotate. The circuit board is electrically connected to the motor. The impeller and the motor are accommodated in the fan frame. The connecting member is disposed at one side of the fan frame. The circuit board is disposed between the connecting member and the fan frame. Also, a fan assembly including such two fans is also disclosed.

Abstract: Disclosed are retainers for a turbocharger. In one embodiment, the retainer includes a generally annular body that defines a bore and one or more channels. The bore is generally directed along a central axis of the body and can be configured to mate with a nose of a center housing of a turbocharger. The channels can be configured to accommodate vanes associated with a cartridge assembly of the turbocharger. One or more legs may extend from the retainer body and may be configured to mate with and locate the retainer relative to a cartridge assembly for the turbocharger. The retainer can also include a concave portion disposed around a perimeter of the body. The concave portion and the body may be together configured to act as a spring when the retainer is mechanically loaded in a direction having a component parallel to the central axis. Also disclosed are corresponding turbochargers.

Abstract: A power system includes a gas turbine engine. The gas turbine engine may include a first portion, a second portion, and a longitudinal axis. The power system may also include a first moveable support engaged to the first portion of the gas turbine engine. The first moveable support may be operable to at least partially constrain movement of the first portion of the gas turbine engine during operation of the gas turbine engine. Additionally, the first moveable support may be operable to at least partially support the first portion of the gas turbine engine as the first portion of the gas turbine engine is moved away from the longitudinal axis independently of the second portion of the gas turbine engine.

Abstract: A pump housing support for use in a pump assembly, the pump assembly including a plurality of component parts which include a seal housing, a drive shaft having a rotation axis, an impeller and a pump housing, the pump housing which includes a main liner. The pump housing support comprises: a base and a mounting member which includes a body portion to which a part of the pump housing can be mounted and a locating flange extending therefrom, the locating flange having first and second locating surfaces on opposing sides thereof, wherein the main liner is located on the first locating surface and the seal housing is located on the second locating surface.

Abstract: Wind turbine systems and methods are provided. The wind turbine system includes a plurality of coaxial, counter-rotating turbine assemblies. First and second shroud assemblies define a generally spherical volume containing the first and second turbine assemblies. The first and second shroud assemblies each include a shroud member that can selectively shield or expose portions of the respective turbine assemblies to the wind by changing the rotational position of the shroud members about the system axis. The turbine assemblies are interconnected to a generator for the production of electrical power.

Abstract: A fan containment system for a gas turbine engine, and a method of making the same, is disclosed that in one embodiment includes casing that surrounds at least a portion of a plurality of fan blades. In one form, a pair of standoff rings is formed in an outer surface of the casing that are spaced apart from one another a predetermined distance running circumferentially about the inner nacelle ring. A containment ring is positioned around a radially outer surface of the standoff rings to form an interference fit between the two.

Abstract: A nacelle for a wind turbine includes a cover defining an internal volume. The cover has longitudinal sides and opposite end walls. A bedplate is within the cover with the power generation and wind turbine control components mounted on the bedplate. The cover has a widest width dimension along the longitudinal sides intermediate of the end walls that exceeds a pre-defined maximum width for rail transport of the nacelle. Removable caps are configured on the longitudinal sides of the cover at the widest dimension, with the caps having a configuration such that upon removal of the caps, the widest width dimension is less than the predefined maximum width for rail transport.

Abstract: A pump for transferring molten metal includes an intake tube, a motor, a rotor positioned at least partially within the bottom end of the intake tube, a rotor shaft positioned at least partially in the intake tube, the rotor shaft having a first end attached to the motor and a second end attached to the rotor. An overflow conduit is attached to the intake tube. The pump does not include a pump housing and preferably does not include a superstructure, so it is relatively small, light and portable. In use, the motor drives the rotor shaft and rotor to generate a flow of molten metal upward into the intake tube and into the overflow conduit where it is discharged.

Abstract: The present invention relates to a device for attaching a turbomachine stator vane in an annular casing (20) of the turbomachine, the vane comprising a tip formed of a platform (14) with two edges (141, 142), one of them forming an upstream edge (141) and the other forming a downstream edge (142), an airfoil (11) and a root (13), the annular casing (20) comprising a circumferential groove (23) formed in its interior wall with an upstream flank (21) and a downstream flank (22), the vane being held by engagement of the platform (14) in the groove (23), the upstream edge against the upstream flank (21) and the downstream edge (142) against the downstream flank (22) of the groove (23), the downstream flank (22) of the groove (23) being in the form of a slot (22) opening axially in the upstream direction, the downstream edge of the platform (23) being engaged in said downstream flank (22) and a fastening means (40) being attached in order to hold the platform (14) in the groove on the upstream side, wherein the va

Abstract: A fan assembly includes a fan, a first plate, and a rack. The fan includes at least one power line. The first plate is mounted on one side of the fan. The first plate mounts an adjustable resistor assembly thereon. The adjustable resistor assembly connects the at least one power line to a power source. The adjustable resistor assembly includes a first resistor and a slider. The slider includes a conducting point. One end of the first resistor is connected to the power source. The at least one power line of the fan is connected to the conducting point. The slider is capable of sliding on the first side plate to have the conducting point contacting different parts of the first resistor to vary the resistor value of the adjustable resistor assembly. The rack is capable of receiving the fan with the first plate mounted therein.

Abstract: A nacelle assembly for a high-bypass gas turbine engine is disclosed and includes a variable area fan nozzle (VAFN) including at least one second fan nacelle section movable relative to the first fan nacelle section to modify an area of the bypass flow path. At least one stiffener is mounted between the first fan nacelle section and the second fan nacelle section. The stiffeners modify mode shapes and natural frequencies to substantially reduce or eliminate flutter within operating ranges that are produced by unsteady aerodynamic loads.

Abstract: A cooling system includes a plurality of fans and a fan bracket accommodating the fans. Each fan comprises a fan intake and a fan outlet. The fan bracket defines a plurality of air inlets and a plurality of air outlets therein. The fan bracket is provided with a fan guard in each air outlet and a plurality of noise-reducing holes in the fan guard. The air inlets of the fan bracket communicate with the fan intakes and the air outlets of the fan bracket communicate with the fan outlets, respectively. Airflow generated by the fans through the fan outlets comprises a portion exiting through the noise-reducing holes.

Abstract: An air blowing device for cooling an internal combustion engine of a vehicle tested on a roller bench, including an air blowing fan configured to blow air towards the air intake opening provided on the vehicle to direct an air stream towards members cooling the engine, including a nozzle arranged between the outlet opening of the air blowing fan and the opening provided on the vehicle. The nozzle has a cross-section relative to the air stream gradually tapering between the outlet opening of the fan and the inlet opening of the vehicle. The nozzle includes two side walls each having an opening allowing a strap to pass, wherein one of the ends is configured to be attached to the vehicle and the other end is configured to be attached to a fixed vertical wall arranged proximate the outlet of the fan.

Abstract: The exhaust-gas turbine comprises a turbine casing, a shaft rotatably mounted in a bearing housing, a turbine wheel arranged on the shaft, and a heat-protection wall, the heat-protection wall defining with the turbine casing an inflow passage leading to the turbine wheel. The heat-protection wall has two seatings, the first seating resting on the bearing housing and the second seating resting on the turbine casing. If the heat-protection wall becomes hot, the two seatings are pressed against the bearing housing and the turbine casing. The turbine casing is pressed outward in the radial direction. Centering of the heat-protection wall and thus also of the turbine casing is ensured by the radially inner seating of the heat-protection wall.

Abstract: An air-cooled electronic device includes a device housing having a bottom surface, and a motorized fan having a fan housing having a mounting hole, and having a hook projection secured to the bottom surface, the hook projection shaped and dimensioned to engage the mounting hole, and having an abutment, with the abutment, the hook and the mounting hole being arranged to secure the fan housing in a position without screws, rivets, or other hardware.

Abstract: The invention provides a blower system of a high performance, which is constructed to have stabilized characteristics, a high efficiency, a reduced thickness and a reduced noise. A blower system according to the invention includes an impeller, a motor for rotating the impeller and having a rotor and a stator, and a bell-mouth for supplying air to an intake port in the impeller, wherein the rotor is fixed to the impeller, and the stator is fixed to the bell-mouth. A gap between the impeller and the bell-mouth is composed of a gap between the rotor and the stator of the motor. Alternatively, the rotor is fixed to the impeller, and the stator is fixed to a fitting for mounting a housing of the blower system or the blower system.

Abstract: The disclosure relates to a steam turbine outer casing that can be at least partially cast out of a first material and has a plurality of support regions adapted to support an inner casing. The outer casing can be at least one support region that has a metal insert, made of a second material, with a flaring portion for retaining the metal insert in the casting of the outer casing. The second material has a greater hot strength than the first material. The support region can include a guide for limiting the movement of the inner casing in the outer casing.

Abstract: In a turbine housing for an exhaust gas turbocharger of an internal combustion engine with at least one spiral channel, which can be coupled into an exhaust gas flow of an exhaust tract of the internal combustion engine, and a receiving space for a turbine wheel which is disposed downstream of the at least one spiral channel and can be acted upon by the exhaust gas of the internal combustion engine passing through the at least one spiral channel of the turbine housing, there is at least one partial housing including the at least one spiral channel, and a housing module which is fastened to the partial housing and has a vane structure disposed upstream of the receiving space which also includes an attachment surface for a bearing section of the exhaust gas turbocharger. The invention also resides in an exhaust gas turbocharger with such a turbine housing as well as to a method for producing such a turbine housing.

Abstract: The present invention is a wall mounted wind turbine used to produce power that includes a wind turbine that is mounted uprightly, a plurality of wind blades that are integral to the wind turbine that receives incoming exterior wind and that rotate around the wind turbine to produce power and a triangular-shaped wind guard that encapsulates and protects top, sides and back of the wind turbine and the wind blades, while allowing exterior wind to enter front of the wind turbine and enhancing the wind turbine performance. There is also advertising indicia disposed on the triangular-shaped wind guard to provide on-premises advertising that can be illuminated or non-illuminated. There is also a sign cabinet embodiment and method of use.

Abstract: A fan assembly includes a chassis and a fan bracket secured in the chassis. The chassis has a bottom wall. The fan bracket includes a first sidewall and a second sidewall perpendicular to the bottom wall, and it is configured for securing the fans. A securing flange extends from an edge of the first sidewall, and is secured to the bottom wall of the chassis. A plurality of securing slots is defined in the securing flange. A plurality of first members engages in the securing slots and isolates the bottom wall of the chassis from the securing flange.

Abstract: The present invention relates to wind supply devices, particularly to an omnidirectional electric fan, comprising a support frame, characterized in that a support ring is movably connected to the support frame, and a fan body is movably connected in the support ring so as to turn to left and right in the support ring. The electric fan not only enables the fan body to swing up and down in a perpendicular direction but also swing to left and right in a horizontal direction, thereby turning at a large angle, providing a broader wind supply scope and facilitating use.

Abstract: A casing cover for enclosing a casing in a jet engine is disclosed. The casing cover includes two coaxial shells arranged one inside the other and radial envelopes which connect the two coaxial shells. Radial arms of the casing extend inside the radial envelopes. The cover is fastened at its downstream end to a first element of the casing and axially abuts at its upstream end on a second element of the casing. In a free state, an axial dimension of the cover of less than the axial distance of the casing between the point where the first element of the casing is fastened to the downstream end of the cover and the point where the second element of the casing axially abuts the upstream end of the cover such that the cover is tensioned axially when it is mounted on and fastened to the casing.

Abstract: A first motor rotates, in one of two rotating directions, the first impeller including a plurality of front blades in a suction opening portion of a housing. The second motor rotates, in the other rotating direction opposite to the one rotating direction, the second impeller including a plurality of rear blades in a discharge opening portion of the housing. A plurality of stationary blades are arranged between the first impeller and the second impeller in the housing. When the number of the front blades is N, that of the stationary blades is M, and that of the rear blades is P, their relationship is defined as N>P>M. A length L1 of the front blades measured in an axial direction is set longer than a length L2 of the rear blades measured in the axial direction.

Abstract: In an annular torsional rigid static component for an aircraft engine, the component includes at least one arrangement for mounting the engine to an aircraft. The mounting arrangement comprises a body formed in a composite material.

Abstract: A fan module of the present invention is disclosed. The fan module is used to be fixed on a first bottom board of a chassis and includes a frame, a circuit board, a plurality of elastic gaskets, a plurality of fixing parts and a plurality of fans. The frame has a second bottom board having a plurality of first openings. The fans are disposed in the frame. The circuit board is fixed onto the frame between the second bottom board and the fans, and electrically connected to the fans. Each of the elastic gaskets is respectively locked at a first opening of the second bottom board and contacts and interferes the first bottom board and the circuit board. In addition, each of the fixing parts respectively goes through a first opening and an elastic gasket and is fixed on the first bottom board of the chassis.

Abstract: A three-dimensionally vibration-preventing buffering mechanism is proposed, which is designed for use in conjunction with a dynamic module for the purpose of buffering the three dimensional vibrations of the dynamic module during operation, and which is characterized by the use of a group of specially-designed chained elastic members, each being composed of at least three integrally-linked flexure hinges whose axes of concavity are oriented respectively in parallel with the three axes of a three-dimensional rectangular coordinate system, so that the vibrations of the dynamic module in all three dimensional directions can be respectively buffered by these flexure hinges to provide a three-dimensional vibration-preventing buffering effect.

Abstract: A composite spacer operable to be mounted on a first component is disclosed herein, wherein compression loads associated with attaching the first component to some other structure are born by the composite spacer to limit compressive deformation of the first component. The composite spacer includes a first body formed of resin and defining an aperture extending along an axis. The composite spacer also includes a plurality of first fibers positioned in the first body about the aperture. Each of the first fibers extends substantially parallel to the axis and increases a compressive strength of the first body relative to the axial direction.

Abstract: A turbine which incorporates intake and exhaust pipes that prevent the passing flow from interfering with, or impeding the operation of the turbine. An optional directional cone, with optional helical supports, mounts within the intake pipe and channels flow at an optimal angle to the turbine blades as well as to the outermost, from the axis of rotation, area of the blade's surface, increasing torque and thus efficiency. The turbine's blades are affixed to the inner surface of a cylindrical shell that is free to rotate within a supporting structure. The cylindrical shell also contains the stationary intake and exhaust pipes. The vacant axis of rotation can be closed or open, by means of shorter blades that form a hole with the distal edges of the blades to allow for passing fish and debris to safely exit. Rotational energy is transferred from the outer surface of the cylindrical shell by gears or belts.

Abstract: A support arrangement for a diaphragm segment in a turbine casing that includes: 1) a support bar joined to a diaphragm segment; 2) a turbine casing comprising a vertical wall and a horizontal shoulder, wherein a portion of the horizontal shoulder underlies the support bar; 3) a cut out area defined by the vertical wall and an outer edge of the support bar; and 4) a shim interposed between the horizontal shoulder and the support bar. The cut out area may be a size that allows the shim to pass through.

Abstract: Provided is a fan motor apparatus. The fan motor apparatus includes a rotor and a stator. The rotor includes a blade. The stator includes a rotor supporting mechanism, a supporting member, and a vibration insulation member. The rotor supporting mechanism rotatably supports the rotor. The supporting member supports the rotor supporting mechanism. The vibration insulation member is provided between the rotor supporting mechanism and the supporting member. The stator is capable of regulating relative movement of the rotor supporting mechanism and the supporting member.

Abstract: A unison ring assembly for an axial compressor casing is provided. The unison ring assembly includes a unison ring and at least three unison ring supports being radial inwardly and equally spaced arranged along a circumference of the unison ring, wherein each unison ring support has a unison ring bracket attached to the unison ring. Further, the unison ring assembly includes a slide bearing to be sliding along a slide face of an outer surface of the compressor casing and a resilient member being arranged between and coupled to the slide bearing and the unison ring bracket such that the unison ring is rotatable around the compressor casing by sliding the slide bearing along the slide face and to be centered free of clearance about the compressor casing. The resilient member is adapted to accommodate radial displacement of the compressor casing.

Abstract: The invention relates to a jet engine nacelle intended to equip an aircraft, comprising a forward air inlet section, a mid-section intended to surround a fan of the jet engine, and an aft section formed from at least first and second hath-shells rotatably mounted about an axis such that they can each be deployed between a working position in which the half-shells are drawn towards one another and a maintenance position in which the half-shells are spaced apart, at least the first half-shell (11) being equipped with a first follower element (19) in a region situated at a distance from the axis of rotation, the nacelle being equipped with a first fixed guide element (28), the first follower element (19) being designed to bear against a first guide element (28) which is fixed with respect to the jet engine during the rotation of the first half-shell (11).

Abstract: A fan holder used to secure a fan to a heat dissipation device, includes a main body for mounting the fan thereon, a pair of blocking wings and a pair of baffle walls extending from the main body to define a space for receiving the fan therein. The blocking wings each include a pair of locking protrusions engaging in the fan to prevent the fan from moving vertically. The baffle walls each includes a pair of blocking flanges fittingly received in cutouts defied in the fan to prevent the fan from moving horizontally along a lateral direction of the fan holder. The baffle walls engage with front and rear sides of the fan for preventing the fan from moving along a front-to-rear direction.

Abstract: An electronic device is directly disposed on a lamp base and is powered by the lamp base. The electronic device includes a connection base matching with a specification of the lamp base, and an air-flow generator. The connection base may be directly screwed into the lamp base to power the air-flow generator, so that the air-flow generator operates to generate an air flow.

Abstract: The present invention provides engine case systems for gas turbine engines. Embodiments of the engine case systems include a plurality of ring cases and a tie-bolt case. The ring cases may house blades and vanes for the compressor and/or for the turbine. The ring cases may be stacked in series, and may be clamped together by a tie-bolt case.

Abstract: Device for attaching ring sectors (20) to a turbine casing (16) in a turbomachine, comprising, at the upstream ends of the ring sectors (20), circumferential coupling means (70, 72) engaged on a casing rail (50) and clamped axially onto the casing rail by a C-section annular locking member (80) engaged axially on the casing rail and on the ring sector coupling means.

Abstract: A turbofan gas turbine engine (10) comprises a fan rotor (32) carrying a plurality of radially extending fan blades (34). A fan blade containment assembly (38) surrounds the fan blades (34) and the fan blade containment assembly (38) comprises a generally cylindrical, or frustoconical, metal casing (40). The casing (40) comprises an annular member (54) positioned axially upstream of the tip (37) of the fan blade (34). The annular member (54) extends in a radially inwardly and axially downstream direction from the metal casing (40) towards the tip (37) of the fan blade. A set of cassettes (120) carries fan blade track panels (71B, 71C, 71D). The cassettes (120) are secured to the metal casing (40) by axially extending members (124, 128) on the upstream and downstream ends (122, 126) of the cassettes (120) which locate on the annular member (54) and are secured to inserts (136) on the inner face of the casing (40).

Abstract: A fan with concealed oscillating mechanism includes a main housing, a first driving motor, a second driving motor and a curved link gear all located inside the main housing, and a set of blades located outside the main housing and connected to a rotating shaft of the first driving motor. The first driving motor has a connecting rod rotatably received in a receiving tube provided in the main housing. The second driving motor is located behind and connected to the first driving motor, and has a rotating shaft being perpendicular to that of the first driving motor. The curved link gear is connected at an end to the second rotating shaft and at another end to the main housing, such that when the second driving motor operates, the first driving motor is brought to oscillate while the set of blades stably rotates to thereby change the direction of produced airflow.

Abstract: A device for supporting and securing a piece of equipment on an aircraft engine or nacelle case, including a vibration damper including a first part secured to the case and a second coaxial part rigidly connected to the piece of equipment, the damper associated with a safety member configured to hold the damper in place on the case in the event of damper failure or breakage. The safety member, which is independent of the damper, is mounted astride the damper and secured to the case.

Abstract: A draft inducer blower for high efficiency furnaces, including a blower housing which provides enhanced contact between the blower housing and the furnace collector box to reduce the flexing and vibration between the blower housing and the collector box. The blower housing includes contact structure which provides a direct abutting contact relationship between the blower housing and the collector box at least along a substantial periphery of the blower housing and/or at one or more rigid transition points on the collector box. In one embodiment, the contact structure can be part of the blower housing body and/or the blower housing cover. In another embodiment, the contact structure can be part of the collector box or furnace to which the blower housing is mounted. When fasteners secure the blower housing to the collector box, the contact structure provides a substantially integral rigid construct between the blower housing and the collector box.

Abstract: A holding device for holding a cooling fan comprising: a duct having a hollow in which a cooling fan is to be fitted; a stopper portion which keeps one operative end of the cooling fan from further moving to hold the cooling fan at a fitting position; and a plurality of elastic wall segments formed in a cooling fan insertion end of a wall of the duct; wherein each of some of the plurality of elastic wall segments is formed with a locking claw for keeping the other operative end of the cooling fan from moving. With this construction, the cooling fan 31 can be more surely mounted in a duct. Consequently, vibration reduction effect and sound reduction effect with respect to the cooling fan is improved.

Abstract: A fan assembly includes a first fan and a second fan mounted on the first fan. The first and second fans respectively include first and second frames. The first frame includes four pairs of first flakes on a top thereof. The first flakes of each pair are arranged face to face, and each protrudes a first hook towards the other one. The second frame includes four pairs of second flakes on a bottom thereof. The second flakes of each pair are arranged back to back, and each protrudes a second hook pointing away from the other one. The pair of second flakes are received between a corresponding pair of first flakes with the second hooks respectively engaging with the first hooks.