CN212003717U - Impeller of centrifugal fan and centrifugal fan with same - Google Patents

Abstract

The utility model discloses a centrifugal fan's impeller and applied centrifugal fan who has this impeller, including the rim plate that is used for installing the motor, set up the mounting hole that the axial link up, is used for the output shaft of motor to pass on the rim plate, its characterized in that: the outer side wall of the mounting hole is provided with a groove communicated with the mounting hole, and the groove is embedded with a damping piece which at least partially extends into the mounting hole and can be abutted against an output shaft of the motor. Also discloses a centrifugal fan applying the impeller. Compared with the prior art, the utility model has the advantages of: through set up the recess that communicates with the mounting hole on the axle sleeve, in the outside of mounting hole to embedded damping piece that can offset with the output shaft of motor in the recess, avoid the rigid connection between rim plate and the motor shaft, thereby play the effect that reduces vibration and noise.

Description

Impeller of centrifugal fan and centrifugal fan with same

Technical Field

The utility model relates to a power device, especially a centrifugal fan's impeller to and the centrifugal fan who has this impeller of application.

Background

The range hood is a kitchen electrical product for purifying kitchen environment, and in the range hood, a fan system is a power core component of the whole range hood. When the range hood works, the range hood sucks and exhausts oil smoke through the operation of a fan system, and the vibration and noise of the fan system mainly come from the pneumatic noise generated by the rotation of the impeller and the mechanical vibration noise caused by unstable airflow, poor dynamic balance of the impeller and the like. In order to reduce the noise generated during the operation of the fan system, in the fan system of the existing range hood, the whole fan system only realizes the damping effect through the damping pad between the motor and the shell.

For disclosing a range hood that uses there is spacing shock-absorbing gasket as application number, including fan spiral case and the motor of fixing on the spiral case, still circumference is provided with the mounting panel on the motor housing, and spacing shock-absorbing gasket snare is established on the motor periphery wall to the mounting panel can be gone into to the U-shaped opening of base member, has seted up the breach that corresponds with the mounting hole on the mounting panel.

This range hood's fan system only adopts spacing shock pad to reduce the rigid contact of motor and mounting panel, because link to each other through the rim plate between fan system's the wheel hub and the motor, and still be rigid connection between rim plate and the motor shaft, so the shock attenuation effect is still more weak, is difficult to play the shock attenuation of ideal, falls the audio effect of making an uproar and does.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is not enough to above-mentioned prior art, provides a centrifugal fan's impeller, through avoiding the rigid connection between rim plate and the motor shaft to play the effect that reduces vibration and noise.

The utility model discloses the second technical problem that will solve is not enough to above-mentioned prior art, provides an use the centrifugal fan who has above-mentioned impeller.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: the utility model provides an impeller of centrifugal fan, is including the rim plate that is used for installing the motor, set up the mounting hole that the axial link up, is used for the output shaft of motor to pass on the rim plate, its characterized in that: the outer side wall of the mounting hole is provided with a groove communicated with the mounting hole, and the groove is embedded with a damping piece which at least partially extends into the mounting hole and can be abutted against an output shaft of the motor.

In order to improve the assembly precision between the wheel disc and the output shaft of the motor and buffer unbalanced vibration caused by the torsion of the motor, the wheel disc comprises a disc-shaped wheel disc body and a hollow shaft sleeve axially extending at the center of the wheel disc body, the mounting hole is formed in the hollow part of the shaft sleeve, the groove axially extends on the shaft sleeve along the mounting hole, and the shock absorbing piece is matched with the groove.

In order to prevent the shock absorbing piece from moving and displacing in the groove, at least one end of the groove extends to the end part of the shaft sleeve far away from the wheel disc body, and a fixing piece for preventing the shock absorbing piece from moving in the groove is arranged at the end part of the corresponding shaft sleeve.

In order to reduce the heat transferred by the rotation of the motor and prolong the service life, the shaft sleeve is provided with heat dissipation holes penetrating through the mounting holes and the outer side of the shaft sleeve.

In order to be more favorable for heat dissipation, the aperture of one side of the heat dissipation hole, which is far away from the mounting hole, is larger than the aperture of one side of the heat dissipation hole, which is close to the mounting hole, so that the heat dissipation hole is in a horn shape.

Preferably, the groove and the shock absorbing member fitted to the groove are T-shaped in radial section.

In order to facilitate the embedding of the shock absorbing part and the demolding of the casting process, the width of the groove is gradually widened from the end part, far away from the wheel disc body, of the shaft sleeve to the inside of the shaft sleeve.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: a centrifugal fan, its characterized in that: an impeller as described above is applied.

Compared with the prior art, the utility model has the advantages of: the shaft sleeve and the outer side wall of the mounting hole are provided with the grooves communicated with the mounting hole, the shock absorbing parts are embedded in the grooves, and the parts of the shock absorbing parts extending into the mounting hole are abutted against the periphery of the output shaft of the motor to form supports, so that the assembly precision between the shock absorbing parts and the output shaft of the motor can be improved, the rigid contact can be effectively avoided, the unbalanced vibration and the noise reduction effect caused by the rotation of the output shaft of the motor can be buffered, and the errors and the eccentricity caused in the processing or assembling process can be compensated; the fixing piece is arranged at the front end of the shaft sleeve, so that the shock absorption piece can be prevented from moving and displacing in the groove; through set up the louvre that link up mounting hole and axle sleeve outside in the circumference of axle sleeve to be convenient for the motor and rotate the in-process heat dissipation, increase of service life.

Drawings

Fig. 1 is a schematic view of an impeller of a centrifugal fan according to an embodiment of the present invention;

fig. 2 is an exploded view of an impeller of a centrifugal fan according to an embodiment of the present invention;

fig. 3 is an exploded view of a wheel disk of an impeller of a centrifugal fan according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of the impeller of the centrifugal fan according to the embodiment of the present invention after the wheel disc has hidden the fixing member.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the disclosed embodiments of the invention may be oriented in different directions and the directional terms are intended to be illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 2, an impeller of a centrifugal fan is disclosed, and the centrifugal fan is mainly used in a range hood. The impeller comprises a front disc 3 and a rear disc 4, a middle disc 1 between the front disc 3 and the rear disc 4, and blades 5 are arranged between the front disc 3 and the middle disc 1 and between the middle disc 1 and the rear disc 4. The middle of the middle disc 1 is provided with a wheel disc 2 for mounting a motor (not shown). In this embodiment, centrifugal fan is two air inlet fan, and the alternative, centrifugal fan also can be single air inlet fan, and rim plate 2 can be connected fixedly with back plate 4 this moment. Not specifically indicated below, then "axial" and "radial" are "axial" and "radial" of the impeller.

The disk 2 includes a disk-shaped disk body 26 and a hollow cylindrical boss 27 extending axially at the center of the disk body 26. The hollow part in the middle of the sleeve 27 forms a mounting hole 21 for the output shaft of the motor to pass through, the mounting hole 21 penetrates through the wheel disc body 26, and the axes of the wheel disc body 26 and the mounting hole 21 are overlapped.

Referring to fig. 3 to 4, a groove 22 communicating with the mounting hole 21 is formed on an outer side wall of the mounting hole 21 (i.e., an inner side wall of the sleeve 27), the groove 22 is formed by radially outwardly recessing the outer side wall of the mounting hole 21, and the groove 22 extends on the sleeve 27 along an axial direction of the mounting hole 21. The grooves 22 are provided in plural numbers and are uniformly distributed around the periphery of the mounting hole 21. The damping piece 23 is embedded in the groove 22, and the groove 22 and the damping piece 23 are designed and embedded in a die drawing mode. The boss 27 includes a boss front end 271 toward the front disk 3, the boss front end 271 being an end of the boss 27 away from the disk body 26, an end of the recess 22 extending to the boss front end 271 to penetrate the boss front end 271, and a fixing member 24 for preventing the shock absorbing member 23 from moving in the recess 22 is provided at the boss front end 271. The boss front end 271 and the fixing member 24 are respectively provided with a first screw hole 272 and a second screw hole 241 for screw coupling. Or may be fastened by rivets or pins. The retainer 24 is annular and is shaped and sized to fit the sleeve front end 271.

In this embodiment, the radial cross-sections of the groove 22 and the shock absorbing member 23 adapted to the groove 22 are both T-shaped, and the width of the T-shaped groove 22 gradually widens from the front end 271 of the shaft sleeve 27 to the inside of the shaft sleeve 27, so that the shock absorbing member 23 can be conveniently embedded, and the die can be conveniently removed during the casting process. The damping piece 23 has draft angle, and the material can be rubber material, has intensity height, long-lived advantage. Wherein one end of T type bumper shock absorber 23 passes in the intercommunication department of mounting hole 21 and recess 22 extends to mounting hole 21, extend towards the axle center direction of the output shaft of the motor in the mounting hole 21, offset and form the support with the periphery of the output shaft of motor, the cushioning effect of bumper shock absorber 23 can promote and the assembly precision between the output shaft of motor, effectively avoid the rigid contact, and then the buffering is because of the unbalanced vibration and the noise reduction effect that the output shaft of motor rotated and arouses, the compensation is because of error and the eccentric amount that causes among processing or the assembling process.

The shaft sleeve 27 is provided with a heat dissipation hole 25 which penetrates through the mounting hole 21 and the outer side of the shaft sleeve 22 and extends in the radial direction in the circumferential direction. The aperture that mounting hole 21 one side was kept away from to louvre 25 is greater than the aperture that is close to mounting hole 21 one side and forms the loudspeaker form, can accelerate the cooling effect, and when the heat of the output shaft conduction of motor directly diffused to the outside through louvre 25, heat and part got into louvre 25 in the circulation air current took away the heat, directly cooled down for the output shaft of motor to realize better cooling effect.

Claims (8)

1. The utility model provides an impeller of centrifugal fan, is including rim plate (2) that are used for installing the motor, set up axial through, be used for mounting hole (21) that the output shaft of motor passed on rim plate (2), its characterized in that: the outer side wall of the mounting hole (21) is provided with a groove (22) communicated with the mounting hole (21), and the groove (22) is embedded with a damping piece (23) which at least partially extends into the mounting hole (21) and can be abutted to an output shaft of the motor.

2. The impeller of a centrifugal fan according to claim 1, wherein: the wheel disc (2) comprises a disc-shaped wheel disc body (26) and a hollow shaft sleeve (27) axially extending at the center of the wheel disc body (26), the mounting hole (21) is formed in the hollow portion of the shaft sleeve (27), the groove (22) axially extends along the mounting hole (21) on the shaft sleeve (27), and the shock absorbing piece (23) is matched with the groove (22).

3. The impeller of a centrifugal fan according to claim 2, wherein: at least one end of the groove (22) extends to the end part of the shaft sleeve (27) far away from the wheel disc body (26), and a fixing part (24) for preventing the shock absorbing part (23) from moving in the groove (22) is arranged at the end part of the corresponding shaft sleeve (27).

4. The impeller of a centrifugal fan according to claim 2, wherein: the shaft sleeve (27) is provided with a heat dissipation hole (25) which penetrates through the mounting hole (21) and the outer side of the shaft sleeve (27).

5. The impeller of a centrifugal fan according to claim 4, wherein: the aperture of one side of the heat dissipation hole (25) far away from the mounting hole (21) is larger than the aperture of one side of the heat dissipation hole close to the mounting hole (21) to form a horn shape.

6. The impeller of the centrifugal fan according to any one of claims 2 to 5, wherein: the groove (22) and the shock absorbing part (23) matched with the groove (22) are T-shaped on the radial section.

7. The impeller of a centrifugal fan according to claim 6, wherein: the width of the groove (22) is gradually widened from the end part of the shaft sleeve (27) far away from the wheel disc body (26) to the inner part of the shaft sleeve (27).

8. A centrifugal fan, its characterized in that: use of an impeller according to any one of claims 1 to 7.

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