CN219345049U - Flexible connection mute centrifugal fan - Google Patents

Abstract

The utility model relates to a flexible connection silence centrifugal fan, it includes the fan body, is provided with the mounting hole of power supply machine shaft installation on the fan body, installs transition axle sleeve and axle fixed sleeve in proper order in the mounting hole, and transition axle sleeve, axle fixed sleeve all with fan body coaxial coupling, the motor shaft is installed in axle fixed sleeve, motor shaft and axle fixed sleeve coaxial coupling, installs flexible cover between transition axle sleeve and the axle fixed sleeve, flexible cover and transition axle sleeve coaxial coupling. The transition shaft sleeve and the shaft fixing sleeve are connected in a transition mode through the flexible sleeve, noise caused by insufficient assembly or machining precision of the centrifugal fan is avoided, and vibration of a motor and a shaft is avoided through flexible connection of the flexible sleeve even if the eccentric shaft sleeve is slightly deformed due to long-term use.

Description

Flexible connection mute centrifugal fan

Technical Field

The application relates to the technical field of central air conditioners, in particular to a centrifugal fan.

Background

The tail end of the central air conditioner is provided with a fan coil, which mainly comprises a motor, an impeller, a volute, a surface cooler, a controller and a shell, when the fan coil runs, the motor drives the impeller to rotate, blades in the impeller force gas to rotate, work on the gas to increase the energy of the gas, the gas is thrown out to the periphery of the impeller under the action of centrifugal force, the speed energy is converted into pressure energy through a vortex shell, after the gas in the impeller is discharged, the pressure in the impeller is lower than the pressure in an air inlet pipe, new gas is sucked into the impeller under the action of pressure difference, and the gas is continuously discharged from the volute to an air outlet, so that heat exchange on a certain space is realized. Wherein the motor, centrifugal fan and volute are the main accessories that cause fan coil noise. The fan coil motor that sells in the present market is ordinary interchange asynchronous machine, and centrifugal fan and spiral case adopt galvanized part to make, and wherein the centrifugal fan that galvanized part processing was made comprises middle fixed plate and blade, and the blade is inlayed on the bayonet socket of middle fixed plate after the blade shaping to constitute centrifugal fan, because the incision of galvanized part has the potential risk of corrosion, and the bayonet socket of blade and fixed plate is fixed and can become flexible because of corrosion, thereby produces the noise. The centrifugal fan and the motor shaft are fixed by the nuts, so that looseness is easy to generate when the motor and the centrifugal fan rotate at high speed, meanwhile, resonance is easy to generate noise because the centrifugal fan and the shaft are rigidly connected, and noise is possibly generated because the centrifugal fan and the motor shaft are assembled subsequently and the centrifugal fans at the two ends of the motor are unbalanced due to assembly errors.

Disclosure of Invention

The application provides a flexible connection silence centrifugal fan that does not have corrosion and silence.

The technical scheme adopted for solving the technical problems is as follows: the flexible connection silence centrifugal fan comprises a fan body, wherein a mounting hole for mounting a motor shaft is formed in the fan body, a transition shaft sleeve and a shaft fixing sleeve are sequentially arranged in the mounting hole, the transition shaft sleeve and the shaft fixing sleeve are coaxially connected with the fan body, a motor shaft is arranged in the shaft fixing sleeve, the motor shaft is coaxially connected with the shaft fixing sleeve, a flexible sleeve is arranged between the transition shaft sleeve and the shaft fixing sleeve, and the flexible sleeve is coaxially connected with the transition shaft sleeve.

Further, a plurality of first grooves are uniformly formed in the inner surface of the transition shaft sleeve, and a plurality of second grooves are uniformly formed in the outer surface of the shaft fixing sleeve.

Further, the centrifugal fan further comprises a mounting plate, and the mounting holes are formed in the mounting plate.

Further, the mounting plate is integrally formed on the fan body.

Further, a plurality of fan blades are uniformly distributed on the fan body.

Further, the fan blade is integrally formed on the fan body.

Further, the fan blades are arranged in the radial direction and extend to the position of the mounting hole.

Further, the fan body includes an upper fan body and a lower fan body, the upper fan body and the lower fan body being separated by the mounting plate.

Further, the mounting plate is arranged in the middle of the fan body.

Further, the blades on the upper fan body are staggered with the blades on the lower fan body.

Compared with the prior art, the application has the following beneficial effects:

(1) The centrifugal fan is made of ABS materials, so that the centrifugal fan cannot be corroded in different environments;

(2) The centrifugal fan is integrally injection molded, so that noise generated due to the problem of structural connection is avoided;

(3) The transition shaft sleeve and the shaft fixing sleeve are in transition connection through the flexible sleeve, so that noise caused by insufficient assembly or machining precision of the centrifugal fan is avoided, and vibration of the motor and the shaft can not be caused through flexible connection of the flexible sleeve even if the eccentric shaft is slightly deformed due to long-term use.

Drawings

Fig. 1 is a schematic perspective view of a flexible connection silent centrifugal fan according to the present application.

Fig. 2 is a schematic structural view of a side portion of the flexibly connected silent centrifugal fan of the present application.

Fig. 3 is a partial cross-sectional view of the flexible connection silent centrifugal fan of the present application with the fan body removed.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the present application and should not be construed as limiting the present application, and all other embodiments obtained by persons of ordinary skill in the art without creative efforts based on the embodiments in the present application are within the scope of protection of the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1 to 3, the flexible connection mute centrifugal fan of the present application includes a fan body 10 and a mounting plate 20 integrally formed on the fan body 10, the mounting plate 20 is disposed in the middle of the fan body 10, a mounting hole 21 for mounting a motor shaft is formed in the mounting plate 20, a transition shaft sleeve 30 is sleeved in the mounting hole 21, a shaft fixing sleeve 40 is sleeved in the transition shaft sleeve 30, a motor shaft 50 is sleeved in the shaft fixing sleeve 40, and a flexible sleeve 60 is disposed between the transition shaft sleeve 30 and the shaft fixing sleeve 40, so as to play a role in damping vibration, and avoid resonance of the centrifugal fan and noise generation.

The fan body and the mounting plate are integrally injection molded by ABS materials, so that the centrifugal fan cannot be corroded in different environments.

The transition shaft sleeve is a metal piece, and the strength of the centrifugal fan and the concentricity of the centrifugal fan and the fan blade are ensured due to the support of the transition shaft sleeve.

The flexible sleeve 60 is made of rubber material, so that even if the fan is slightly deformed to cause eccentricity under the condition of longer use, vibration of the motor and the shaft can not be caused by flexible connection of the flexible sleeve, and noise generated due to insufficient assembly or machining precision of the centrifugal fan is avoided.

The inner surface of the transition shaft sleeve 30 is uniformly provided with a plurality of first grooves, so that when the flexible sleeve is installed in the transition shaft sleeve 30, the flexible sleeve can deform to be embedded into the first grooves, and the flexible sleeve can not axially displace.

The outer surface of the shaft fixing sleeve 40 is uniformly provided with a plurality of second grooves, so that when the flexible sleeve is installed outside the shaft fixing sleeve 40, the flexible sleeve can deform to be embedded into the second grooves, and the flexible sleeve is tightly coated on the shaft fixing sleeve without displacement, so that the integrity of the centrifugal fan is ensured.

The fan body 10 is a ring body, the surface of the fan body is uniformly provided with a plurality of fan blades 13, and the fan blades 13 extend towards the center direction of the ring body. Wherein, this fan blade is the arc setting.

The fan body 10 is arranged in an upper layer and a lower layer, the upper layer and the lower layer of fan bodies 11 and 12 are separated by the mounting plate, the upper fan body 11, the mounting plate 20 and the lower fan body 12 are formed by integral injection molding, each layer of fan body is uniformly provided with a plurality of fan blades 13, the fan blades 13 on the upper fan body 11 are separated from the fan blades 13 on the lower fan body 12, and specifically, the fan blades 13 on the lower fan body 12 are positioned between two adjacent fan blades 13 on the upper fan body 11.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structural changes made by the specification and drawings of the present application or direct/indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims (10)

1. A flexible connection silence centrifugal fan, its characterized in that: the centrifugal fan comprises a fan body, a mounting hole for mounting a motor shaft is formed in the fan body, a transition shaft sleeve and a shaft fixing sleeve are sequentially arranged in the mounting hole, the transition shaft sleeve is coaxially connected with the fan body, a motor shaft is arranged in the shaft fixing sleeve, the motor shaft is coaxially connected with the shaft fixing sleeve, a flexible sleeve is arranged between the transition shaft sleeve and the shaft fixing sleeve, and the flexible sleeve is coaxially connected with the transition shaft sleeve.

2. The flexible connection silent centrifugal fan of claim 1, wherein a plurality of first grooves are uniformly provided on the inner surface of the transition sleeve, and a plurality of second grooves are uniformly provided on the outer surface of the shaft fixing sleeve.

3. The flexible connection silent centrifugal fan of claim 1, further comprising a mounting plate, said mounting holes being provided on said mounting plate.

4. A flexible connection silent centrifugal fan according to claim 3, in which the mounting plate is integrally formed on the fan body.

5. The flexible connection silent centrifugal fan according to claim 3, wherein a plurality of fan blades are uniformly distributed on the fan body.

6. The flexible connection silent centrifugal fan as described in claim 5, wherein said fan blades are integrally formed on said fan body.

7. The flexible connection silent centrifugal fan according to claim 5 or 6, wherein said blades are arranged radially and extend to the position of said mounting hole.

8. The flexible connection silent centrifugal fan of claim 5, wherein the fan body comprises an upper fan body and a lower fan body, the upper fan body and the lower fan body being separated by the mounting plate.

9. The flexible connection silent centrifugal fan as described in claim 8, wherein said mounting plate is disposed in the middle of said fan body.

10. The flexible connection silent centrifugal fan of claim 8, wherein the blades on the upper fan body are staggered from the blades on the lower fan body.

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