TWI422125B - The cooling structure of the alternator flywheel - Google Patents

Description

Cooling structure of alternator flywheel

The present invention relates to a flywheel device for an alternator, and more particularly to an air-cooled cooling structure design for use in the flywheel device.

At present, the flywheel device of the alternator mainly comprises a winding coil set and a flywheel, wherein the flywheel of the coil set is a stator, and a flywheel with a ring-shaped permanent magnet is rotatably sleeved around the coil assembly as a rotor. The flywheel is provided with a lock fixing member connected to the crankshaft of the crankcase, so that the flywheel can be driven to operate. In addition, in order to provide heat dissipation for the engine room, the flywheel device further locks a fan on one side wall of the flywheel, and the fan can generate a heat dissipation air flow when the flywheel is driven to rotate, and the fan is rotated by the air guide cover. The airflow directs the engine compartment to provide heat dissipation.

However, in the structure of the existing flywheel device, although the flywheel incorporates a fan, the heat dissipation function to the engine room is generated when the fan is driven to rotate along with the flywheel. However, the fan generates a radial airflow and does not blow the flywheel, and the flywheel The heat generated by the rotation of the drive and the heat generated by the winding of the coil set in the flywheel cannot be effectively dissipated, and the flywheel itself has no better heat dissipation structure, so that the temperature of the flywheel is high, which affects the flywheel. Work efficiency.

The main object of the present invention is to provide a cooling structure for an alternator flywheel, thereby improving the shortcomings of the heat dissipation performance provided by the existing alternator flywheel cooling structure.

In order to achieve the foregoing, the cooling structure of the alternator flywheel designed by the present invention comprises a flywheel and a fan disposed on one side of the flywheel, wherein the fan is provided with a plurality of heat dissipating blades, wherein the fan has a fixed wall The fixed wall is formed with a plurality of hollow portions facing the flywheel side, and cooling fins are formed in each hollow portion.

The invention adopts the foregoing flywheel cooling structure design, which is characterized in that: when the flywheel is driven to rotate together with the fan, the fan generates a radial blowing air flow in addition to the outer peripheral heat dissipating blades for providing the necessary engine through the air guiding cover. The present invention further utilizes the cooling blades in the fixed wall hollow portion to generate an axially blown cooling airflow to the surface of the flywheel, effectively improving the cooling and cooling performance of the flywheel, and reducing the temperature of the flywheel rotating motion, so that the alternator Maintain a better output.

The second object of the present invention is to further form a plurality of fins on the outer peripheral surface of the flywheel for expanding the heat dissipating surface of the flywheel, and the rotating of the flywheel can have the effect of generating a heat dissipating airflow by the fan blades.

As shown in the first figure, a preferred embodiment of the flywheel cooling structure of the present invention is disclosed in combination with a coil assembly (3) to form an alternator flywheel device, the flywheel cooling structure comprising a flywheel (1) and a a fan (2), wherein: as shown in the first and third figures, the flywheel (1) comprises an annular outer peripheral wall (11) and a chamber located in the outer peripheral wall (11), the outer peripheral wall (11) An opening is formed on one side of the chamber, and a side wall (12) is formed on the other side of the chamber to form a closed side. The flywheel (1) is provided with an annular permanent magnet (15) on the inner side wall of the outer peripheral wall thereof, and The winding chamber (3) is disposed in the chamber, the winding coil assembly (3) is used as a stator, the flying wheel (1) is used as a rotor, and a through hole (13) is disposed in the center of the side wall (12).

In the flywheel (1), the outer peripheral wall surface may be a smooth curved surface, or as in the preferred embodiment shown in the second figure, the outer peripheral wall surface of the flywheel (1) forms a plurality of heat radiating fins (14). In order to expand the surface area of the flywheel (1), it also allows the flywheel (1) to rotate and have the effect of generating a gas flow like a fan.

As shown in the first and third figures, the fan (2) comprises a fixed wall (20), a plurality of heat dissipating blades (24) and a plurality of cooling blades (25), and the fixing wall (20) can form a central convex cone. The fixing wall (20) is provided with a fixing hole (21) at the center thereof, and the plurality of heat dissipating blades (24) are arranged on the outer side of the fixing wall (20), and the fixing wall (20) is provided with a plurality of locks. a plurality of hollow portions (23), wherein the plurality of hollow portions (23) are arranged in a ring segment outside the fixed wall (20), and the plurality of cooling fins (25) are respectively formed on the ring portion (23) In the plurality of hollow portions (23), the fan (2) abuts against the side wall of the flywheel (1) with its fixing wall (20) and is fixed to the flywheel (1) by screwing through the locking hole (22). The plurality of hollow portions (23) are oriented toward the side wall of the flywheel (1), the outer peripheral edge of the fixed wall (20) has an outer ring frame (26), and one end of the cooling blade (25) is coupled to the side of the hollow portion (23) The other end is connected to the outer ring frame (26), and the plurality of heat dissipating blades (24) are connected to the fixed wall (20) having the outer ring frame (26) on one side, and the other side frame is connected to the side ring frame (27). ).

When the flywheel cooling structure of the present invention is assembled and used, as shown in the third and fourth figures, the crankshaft (5) of the engine room (4) is connected to the transmission rod (50) through the coil assembly (3), the flywheel. (1) The middle hole is then locked at the fixing hole (21) of the fan (2), and a windshield cover (6) is arranged around the fan (2), and the air guiding cover (6) extends to the engine Room (4). When the engine is actuated, its crankshaft (5) drives the flywheel (1) and the fan (2) on one side thereof to rotate, wherein the electromagnetic interaction between the permanent magnet (15) in the flywheel (1) and the coil assembly (3) is utilized. Power generation; on the other hand, the rotating fan (2) generates a radially blown airflow with a plurality of heat radiating blades (24) on its outer periphery, and is blown toward the engine room under the guidance of the air guiding cover (6), providing the necessary The heat dissipation airflow, and the fan (2) simultaneously uses the cooling blades (25) at the hollow portions (23) of the fixed wall (20) to generate an axially blown cooling airflow to the surface of the flywheel (1), the tapered fixed wall (20) and the cooling blade (25) is dispersed in the outer ring section of the fixed wall (20) to guide the airflow, and provides the effective cooling efficiency of the flywheel (1), thereby reducing the temperature of the rotating motion of the flywheel (1). The alternator is maintained in a better output state.

(1). . . flywheel

(11). . . Peripheral wall

(12). . . Side wall

(13). . . Middle hole

(14). . . Heat sink fin

(15). . . permanent magnet

(2). . . fan

(20). . . Fixed wall

(twenty one). . . Fixed hole

(twenty two). . . Lock hole

(twenty three). . . Hollowing

(twenty four). . . Heat sink blade

(25). . . Cooling blade

(26). . . Outer ring frame

(27). . . Side ring frame

(3). . . Winding coil set

(4). . . Engine room

(5). . . Crankshaft

(50). . . Transmission rod

(6). . . Air hood cover

The first figure is a schematic exploded view of the cooling structure of the alternator flywheel of the present invention and the wound coil assembly.

The second figure is a perspective view of another preferred embodiment of forming a plurality of fins on the outer peripheral surface of the flywheel in the cooling structure of the alternator flywheel of the present invention.

The third figure is a schematic cross-sectional view of the cooling structure of the alternator flywheel shown in the first figure combined with the coil assembly.

The fourth figure shows the cooling structure of the alternator flywheel shown in the first figure, which is combined with the winding coil set, and is connected to the use state of the engine room crankshaft.

(1). . . flywheel

(11). . . Peripheral wall

(12). . . Side wall

(13). . . Middle hole

(2). . . fan

(20). . . Fixed wall

(twenty two). . . Lock hole

(twenty three). . . Hollowing

(twenty four). . . Heat sink blade

(25). . . Cooling blade

(26). . . Outer ring frame

(27). . . Side ring frame

(3). . . Winding coil set

Claims (4)

A cooling structure of an alternator flywheel, comprising a flywheel and a fan disposed on one side of the flywheel, wherein the fan is provided with a plurality of heat dissipating blades, wherein the fan has a fixed wall, and the fixed wall forms a number a hollow portion facing the flywheel side, a cooling blade is formed in each hollow portion; an outer peripheral edge of the fixed wall of the fan has an outer ring frame, and one end of the cooling blade is connected to the side edge of the hollow portion, and the other end is connected to the outer ring frame; One side of the plurality of heat dissipating blades is connected to the fixed wall having the outer ring frame, and the other side is connected to the one side ring frame. The cooling structure of the alternator flywheel according to claim 1, wherein the flywheel has a side wall, and a central hole is formed in the center of the side wall; the center of the fixed wall of the fan is convex. The cooling structure of the alternator flywheel according to the second aspect of the invention, wherein the fixed wall is provided with a fixing hole, and the plurality of hollow portions are arranged in the outer wall of the fixed wall. The cooling structure of an alternator flywheel according to any one of claims 1 to 3, wherein the flywheel has a plurality of fins formed on an outer peripheral wall thereof.