Centrifugal fan

Abstract

The utility model discloses a centrifugal fan and relates to the technical field of fans. An air inlet is formed in one side of the volute, an air outlet is formed in one end of the volute, and an impeller is arranged in the volute; one end of the fan motor is fixed to the side, away from the air inlet, of the volute, and the other end of the fan motor is suspended. An output shaft of the fan motor is connected with the impeller and used for driving the impeller to rotate. The support is fixedly connected with the volute and used for supporting the volute. By the adoption of the technical scheme, the fan has the advantages of being stable in operation, small in vibration, low in noise and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, concretely relates to a centrifugal fan. BACKGROUND

[0002] The centrifugal fan is a kind of machinery that relies on input mechanical energy to improve gas pressure and discharge gas, and it is a driven fluid machinery.The centrifugal fan is widely used for ventilation, dust removal and cooling of factory, mine, tunnel, cooling tower, vehicle, ship and building, ventilation and air induction of boiler and industrial furnace, cooling and ventilation in air conditioning equipment and household appliance equipment, grain drying and selection and delivery, wind tunnel air source and air cushion ship inflation and propulsion, etc.The working principle of centrifugal fan is to accelerate, then decelerate and change flow direction to convert kinetic energy into potential energy by high-speed rotating impeller.

[0003] The conventional centrifugal fan is turbine at the end of motor, and the motor is fixed by foot, and the volute is only supported by motor, when the volute is subjected to large external force, relative deviation between motor and volute is generated, thereby affecting the stability of impeller rotation, causing the vibration of fan to be larger, noise to be larger, and even causing motor bearing damage. UTILITY MODEL CONTENT

[0004] The utility model aims at the defects and deficiencies of prior art, and provides a centrifugal fan, which has the advantages of stable fan operation, small vibration, small noise and long service life.

[0005] To achieve the above object, the utility model adopts the technical scheme of a centrifugal fan, which comprises:

[0006] Volute, the volute is provided with air inlet on one side and air outlet at one end, and the volute is provided with impeller inside;

[0007] Fan motor, one end of the fan motor is fixed on the side of the volute away from the air inlet, and the other end is suspended;the output shaft of the fan motor is connected with the impeller, and used for driving the impeller to rotate;

[0008] Support, the support is fixedly connected with the volute, and used for supporting the volute.

[0009] The utility model further sets, the support is arranged on the side of the volute close to the fan motor.

[0010] The utility model further sets, the support is annularly arranged on the circumferential side of the fan motor, so as to surround the fan motor on the inner side of the support.

[0011] The utility model further sets up, the support sets up the cylinder, include: the first fixed plate, second fixed plate of parallel arrangement, and a plurality of support rods for connecting the first fixed plate with the second fixed plate.

[0012] The utility model further sets up, a plurality of support rods evenly distribute in the circumferential side of fan motor.

[0013] The utility model further sets up, the support rod sets up L shaped pole.

[0014] The utility model further sets up, the fan motor is close to the one end of volute and is provided with the connecting disc, the volute is provided with the connecting seat corresponding the connecting disc, is fixed to the volute with the cooperation of connecting disc and connecting seat with fan motor.

[0015] The utility model further sets up, the support with volute is connected through stud bolt.

[0016] The utility model further sets up, the volute vertical vertical arrangement is arranged upwards, and the air outlet is set up in the upper end of volute.

[0017] After adopting above-mentioned technical scheme, the utility model has the beneficial effects that:

[0018] In the utility model, fan motor is only connected with volute, and other parts are all in suspension, so when volute is impacted or extruded by external force and the position of volute is deviated, fan motor will move along with volute, and the relative position between fan motor and volute will not be affected, volute can keep stable, good relative position and assembly effect with fan motor at all times, the stability of centrifugal fan is guaranteed, the problems of large running vibration amplitude and large running noise due to the change of relative position between fan motor and volute are avoided. ACCURACY

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without the creative labor.

[0020] Figure 1 It is the structural schematic diagram of the utility model;

[0021] Figure 2 It is the structural schematic diagram of another view of the utility model;

[0022] Figure 3 is another perspective view of the structure of the utility model;

[0023] Figure 4 is the structure explosion schematic view of the utility model;

[0024] Figure 5 is another perspective view of the structure explosion schematic view of the utility model;

[0025] Figure 6 is the structure explosion schematic view of the volute of the utility model;

[0026] Figure 7 is the structure schematic view of the support of the utility model.

[0027] Mark explanation: 100, volute;110, air inlet;120, air outlet;130, impeller;200, fan motor;300, support;310, first fixed plate;320, second fixed plate;330, support rod;210, connecting disc;140, connecting seat;400, double head bolt;150, first shell;160, second shell. Specific implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "connected" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances. In the embodiments of this application, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "on the surface" can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," and "beneath" can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this specification, the use of terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] This embodiment relates to a centrifugal fan, such as Figures 1-7 As shown, it includes: volute 100, fan motor 200, and bracket 300.

[0030] The volute 100 is provided with an air inlet 110 on one side and an air outlet 120 at one end, and the volute 100 is internally provided with an impeller 130; one end of the fan motor 200 is fixed on the volute 100 away from the air inlet 110, and the other end is suspended; the output shaft of the fan motor 200 is connected with the impeller 130 for driving the impeller 130 to rotate; so as to suck the air at the air inlet 110 into the volute 100 and then discharge it from the air outlet 120. One end of the support 300 is fixedly connected with the volute 100, and the other end is fixed on the ground or working surface for supporting the volute 100 and ensuring the stability of the volute 100.

[0031] The fan motor 200 is only connected with the volute 100, and the other parts are suspended, so when the volute 100 is subjected to external force impact or extrusion and the position of the volute 100 is deviated, the fan motor 200 will move with the volute 100 and will not affect the relative position between the fan motor 200 and the volute 100. The volute 100 can always maintain stable and good relative position and assembly effect with the fan motor 200, ensuring the stability of the centrifugal fan, avoiding the problem of large running vibration amplitude and large running noise due to the change of the relative position between the fan motor 200 and the volute 100. At the same time, it also avoids the damage of the centrifugal fan caused by abnormal stress between the fan motor 200 and the volute 100, thereby ensuring the service life of the centrifugal fan.

[0032] In the embodiment, the support 300 is arranged on the side of the volute 100 close to the fan motor 200 to support the volute 100. Due to the supporting effect of the support 300, the side of the volute 100 can be strengthened to avoid deformation of the volute 100 caused by the gravity of the fan motor 200, thereby improving the stability of the centrifugal fan. Of course, in other embodiments, the support 300 can be arranged at other positions, such as the air inlet 110 side of the volute 100 or the air outlet 120 end of the volute 100, to achieve good supporting effect of the volute 100.

[0033] As a preferred scheme, the bracket 300 is arranged around the periphery of the fan motor 200 to support the volute 100 at multiple points around the fan motor 200, increase the contact area between the bracket 300 and the volute 100, and avoid deformation of the volute 100 when subjected to external force, thereby affecting the operation effect of the centrifugal fan. The bracket 300 surrounds the fan motor 200 on the inner side of the bracket 300, and can also protect the fan motor 200, effectively preventing foreign matter from impacting the fan motor 200, and ensuring good operation of the centrifugal fan. In the embodiment, the bracket 300 is cylindrical and includes a first fixed plate 310, a second fixed plate 320, and a plurality of support rods 330 connecting the first fixed plate 310 and the second fixed plate 320. The first fixed plate 310 is the part of the bracket 300 connected to the volute 100 to increase the contact area between the bracket 300 and the volute 100, and the plurality of support rods 330 can ensure the strength of the bracket 300 to achieve good support effect.

[0034] In the embodiment, the plurality of support rods 330 are uniformly distributed around the periphery of the fan motor 200 to achieve good support effect on the volute 100, and simultaneously protect the fan motor 200 uniformly around the periphery. As a preferred scheme, the support rod 330 is arranged as an L-shaped rod, which has good rigidity to ensure the good strength of the bracket 300.

[0035] As a preferred scheme, the fan motor 200 is provided with a connecting disc 210 at one end close to the volute 100, and the volute 100 is provided with a connecting seat 140 corresponding to the connecting disc 210, so that the fan motor 200 is fixed to the volute 100 through cooperation of the connecting disc 210 and the connecting seat 140, to achieve stable fixing effect and ensure good operation of the centrifugal fan. In the embodiment, the connecting disc 210 and the connecting seat 140 are both arranged in a circular shape, so that the connection between them is more stable. In the embodiment, the bracket 300 is connected to the volute 100 through a double-headed bolt 400, which can provide higher connection strength to ensure the connection stability between the bracket 300 and the volute 100.

[0036] In the embodiment, the volute 100 is vertically arranged in a vertical upward manner, the air outlet 120 is arranged at the upper end of the volute 100, the air inlet 110 and the fan motor 200 are respectively located on the two sides of the volute 100, and the external pipeline is connected to the air outlet 120. The external pipeline extrudes the volute 100, and does not cause the position of the volute 100 and the fan motor 200 to deviate, so that the centrifugal fan can operate stably, and the vibration amplitude and the operation noise are small. As a preferred scheme, the volute 100 is assembled by a first shell 150 and a second shell 160, which is more convenient for installation of the fan motor 200 and the impeller 130; and the air inlet 110 is arranged on the first shell 150.

[0037] The above merely aims to illustrate the technical solutions of the present application but not to limit the present application. Other modifications or equivalent replacements to the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application as long as they do not depart from the spirit and scope of the present application.

Claims

1. A centrifugal fan, characterized in that, include: A volute (100) is provided with an air inlet (110) on one side and an air outlet (120) at one end. An impeller (130) is provided inside the volute (100). A fan motor (200) is provided, with one end of the fan motor (200) fixed to the side of the volute (100) away from the air inlet (110), and the other end suspended in the air. The output shaft of the fan motor (200) is connected to the impeller (130) and is used to drive the impeller (130) to rotate. A bracket (300) is fixedly connected to the volute (100) and is used to support the volute (100).

2. The centrifugal fan according to claim 1, characterized in that, The bracket (300) is located on the side of the volute (100) near the fan motor (200).

3. The centrifugal fan according to claim 2, characterized in that, The bracket (300) is arranged around the periphery of the fan motor (200) to surround the fan motor (200) inside the bracket (300).

4. The centrifugal fan according to claim 3, characterized in that, The bracket (300) is cylindrical and includes: a first fixing plate (310) and a second fixing plate (320) arranged in parallel, and multiple support rods (330) for connecting the first fixing plate (310) and the second fixing plate (320).

5. The centrifugal fan according to claim 4, characterized in that, Multiple support rods (330) are evenly distributed around the fan motor (200).

6. The centrifugal fan according to claim 4, characterized in that, The support rod (330) is configured as an L-shaped rod.

7. The centrifugal fan according to claim 1, characterized in that, The fan motor (200) is provided with a connecting plate (210) at one end near the volute (100), and the volute (100) is provided with a connecting seat (140) corresponding to the connecting plate (210). The fan motor (200) is fixed to the volute (100) by the cooperation of the connecting plate (210) and the connecting seat (140).

8. The centrifugal fan according to claim 1, characterized in that, The bracket (300) and the volute (100) are connected by a double-ended bolt (400).

9. The centrifugal fan according to claim 1, characterized in that, The volute (100) is arranged vertically upwards, and the air outlet (120) is located at the upper end of the volute (100).

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