High-speed centrifugal fan

Abstract

The utility model provides a high-speed centrifugal fan, and relates to the technical field of centrifugal fans. A set of ground feet are arranged at the bottom of the machine shell. A motor assembly is installed on the inner side of the machine shell. Eight reinforcing ribs are annularly arranged on the outer side of the motor assembly; eight groups of radiating ribs are annularly arranged on the outer side of the motor assembly; an adapter flange is mounted on the right side of the motor assembly; a volute is mounted on the right side of the adapter flange; a centrifugal impeller is mounted on the outer side of the right end of a rotating shaft of the motor assembly; a heat dissipation fan blade is installed on the outer side of the left end of a rotating shaft of the motor assembly. According to the centrifugal fan, the weight of the centrifugal impeller can be effectively reduced, the operation noise can be reduced, meanwhile, the air circulation amount is increased, the good heat dissipation effect on the motor assembly is achieved, meanwhile, energy consumption is reduced, and the service life can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to high-speed centrifugal fans. Background Art

[0002] When a centrifugal fan is working, it mainly converts the mechanical energy of the rotating impeller into the pressure energy and kinetic energy of the gas and transports the gas out. The centrifugal fan mainly consists of a casing, a driving motor assembly and a centrifugal impeller.

[0003] At present, the impellers on centrifugal fans are mostly made of cast iron, which are heavy in weight. Moreover, the blades on the impellers are mostly straight blades, which will generate relatively large noise during rotation, and the air flow rate is also relatively small. When the motor assembly works and generates heat, it is necessary to additionally install a motor-driven fan blade to dissipate heat from the motor assembly. The heat dissipation efficiency is low and the energy consumption is also increased. In addition, the opening positions where the rotating shaft cooperates with the casing mostly use oil seals for sealing to prevent external water vapor from entering the interior and causing corrosion. However, a large amount of heat is generated by friction during the operation of the contact oil seal, which is prone to aging and failure. Summary of the Invention

[0004] The utility model provides a high-speed centrifugal fan, which can effectively reduce the weight of the centrifugal impeller, reduce the operation noise, increase the air flow rate at the same time, have a good heat dissipation effect on the motor assembly while reducing the energy consumption, and can extend the service life.

[0005] In the first aspect of the present disclosure, a high-speed centrifugal fan is provided, which specifically includes: a casing;

[0006] A set of feet are arranged at the bottom of the casing; a motor assembly is installed inside the casing; eight reinforcing ribs are arranged in a circular arrangement outside the motor assembly; eight groups of heat dissipation ribs are also arranged in a circular arrangement outside the motor assembly; a transfer flange is installed on the right side of the motor assembly; a volute is installed on the right side of the transfer flange; a centrifugal impeller is installed outside the right end of the rotating shaft of the motor assembly; a heat dissipation fan blade is installed outside the left end of the rotating shaft of the motor assembly.

[0007] In at least some embodiments, the heat dissipation ribs are strip-shaped plate structures, the outer sides of the reinforcing ribs are all fixedly connected to the inner wall of the casing, and six strip-shaped plate structures are also arranged on the outer sides of the reinforcing ribs.

[0008] In at least some embodiments, the centrifugal impeller is made of aluminum alloy, and a number of blades are arranged on the centrifugal impeller, and the blades are all curly structures.

[0009] In at least some embodiments, eight heat dissipation channels running through left and right are arranged between the reinforcing ribs, and eight groups of heat dissipation ribs are respectively arranged in the eight heat dissipation channels.

[0010] In at least some embodiments, the blades on the centrifugal impeller are divided into large blades and small blades, and the large blades and small blades are arranged alternately.

[0011] In at least some embodiments, a deflector is installed on the left side of the casing. The cooling fan blades are located in the deflector, and the cooling channels between the reinforcing ribs are all connected to the cavity in the deflector on the left side of the casing. The casing is also an aluminum alloy casing.

[0012] In at least some embodiments, eleven annular protrusions are provided at the bottom of the centrifugal impeller, and eleven corresponding annular grooves are also provided on the right side of the adapter flange.

[0013] The present utility model provides a high-speed centrifugal fan, which has the following beneficial effects:

[0014] The centrifugal impeller in the present utility model is made of aluminum alloy, which effectively reduces the weight. Moreover, the curled blades on the centrifugal impeller can reduce the running noise, increase the air flow rate at the same time. And the motor assembly in the centrifugal fan can also drive the cooling fan blades to rotate simultaneously. The cooling fan blades can send air into the cooling channels between the outside of the motor assembly and the inside of the casing. Together with the cooling ribs, the cooling efficiency can be improved. Therefore, the energy consumption can be reduced, and the outside water vapor can be prevented from entering the inside of the motor assembly to corrode the electronic components through the air seal method, and the service life can also be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0016] The drawings in the following description only relate to some embodiments of the present utility model and do not limit the present utility model.

[0017] In the drawings:

[0018] Figure 1 A schematic view of the main shaft side showing the overall structure of the present application;

[0019] Figure 2 A schematic view of the front right shaft side after the volute is disassembled in the present application;

[0020] Figure 3 A schematic view of the right shaft side of the casing and the motor assembly in the present application;

[0021] Figure 4 A schematic view of the left shaft side of the casing and the motor assembly in the present application;

[0022] Figure 5 A schematic view of the bottom shaft side of the casing in the present application;

[0023] Figure 6Shows a schematic diagram of the main shaft side structure of the centrifugal impeller in the present application;

[0024] Figure 7 Shows a schematic diagram of the bottom shaft side structure of the centrifugal impeller in the present application;

[0025] List of reference numerals

[0026] 1. Housing; 2. Anchor; 3. Motor assembly; 4. Reinforcing rib; 5. Heat dissipation rib; 6. Volute; 7. Adapter flange; 8. Centrifugal impeller; 9. Heat dissipation fan blade. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0028] Embodiment 1: Please refer to Figures 1 to 7 :

[0029] The present utility model provides a high-speed centrifugal fan, including: housing 1;

[0030] A set of feet 2 is provided at the bottom of the casing 1. The casing 1 is used to wrap and protect the motor assembly 3. When installing this centrifugal fan, the feet 2 can be fixed in cooperation with bolts; a motor assembly 3 is installed inside the casing 1, and the motor assembly 3 is used to drive the centrifugal impeller 8 and the cooling fan blade 9 to rotate; eight reinforcing ribs 4 are arranged in a circular pattern on the outside of the motor assembly 3. The reinforcing ribs 4 are used to connect the casing 1 and the motor assembly 3, and can improve the strength of the casing 1 and reduce deformation; eight groups of cooling ribs 5 are also arranged in a circular pattern on the outside of the motor assembly 3. When the motor assembly 3 operates, the heat generated will be transferred to the cooling ribs 5. When the air flows to the right in the cooling channels between the reinforcing ribs 4, it can adsorb the heat on the cooling ribs 5, so as to play a good role in cooling the motor assembly 3; a transfer flange 7 is installed on the right side of the motor assembly 3, and the transfer flange 7 is used to support the volute 6; a volute 6 is installed on the right side of the transfer flange 7, and the volute 6 is used to blow the air outwards; a centrifugal impeller 8 is installed on the outside of the right end of the rotating shaft of the motor assembly 3. When the motor assembly 3 operates, it will drive the centrifugal impeller 8 to rotate at a high speed through the rotating shaft. When the centrifugal impeller 8 rotates, the large blades and small blades on its outside will push the air towards the volute 6, and the curly blades can play a noise reduction effect, and the cooperation of the large blades and small blades can increase the air flow rate; a cooling fan blade 9 is installed on the outside of the left end of the rotating shaft of the motor assembly 3. When the motor assembly 3 operates, it will also drive the cooling fan blade 9 to rotate at a high speed through the rotating shaft. When the cooling fan blade 9 rotates, it will suck in the air through the opening on the left side of the guide cover installed on the left side of the casing 1, and then push the air into the cooling channels between the reinforcing ribs 4.

[0031] In the embodiment of the present disclosure, as Figure 3 and Figure 4 shown, the cooling rib 5 is a long strip plate-like structure. The outer sides of the reinforcing ribs 4 are fixedly connected to the inner wall of the casing 1, and six long strip plate-like structures are also arranged on the outer sides of the reinforcing ribs 4. When the motor assembly 3 operates, the heat generated will be transferred to the long strip plate-like structures on the outer sides of the reinforcing ribs 4 and the cooling rib 5. When the air flows to the right in the cooling channels between the reinforcing ribs 4, it can adsorb the heat on the long strip plate-like structures on the outer sides of the reinforcing ribs 4 and the cooling rib 5. Finally, the air after adsorbing the heat will be discharged outwards through the opening on the right side of the casing 1, so as to play a good role in cooling the motor assembly 3.

[0032] In the embodiment of the present disclosure, as Figure 6 and Figure 7 shown, the centrifugal impeller 8 is made of aluminum alloy. A number of blades are provided on the centrifugal impeller 8, and the blades are all curly structures. When in use, the motor assembly 3 can be powered on and started. When the motor assembly 3 operates, it will drive the centrifugal impeller 8 to rotate at a high speed through the rotating shaft. When the centrifugal impeller 8 rotates, the large blades and small blades on its outside will push the air towards the volute 6, and the curly blades can play a noise reduction effect.

[0033] In the present disclosure, Figures 1 - 5 As shown, a total of eight heat dissipation channels are arranged between the reinforcing ribs 4, and eight groups of heat dissipation ribs 5 are respectively arranged in the eight heat dissipation channels. The heat generated by the motor assembly 3 when working will be transferred to the long plate-like structure outside the reinforcing ribs 4 and the heat dissipation ribs 5. When the air flows to the right in the heat dissipation channel between the reinforcing ribs 4, it can absorb the heat from the long plate-like structure outside the reinforcing ribs 4 and the heat dissipation ribs 5. Finally, the air that has absorbed the heat will be discharged outward through the opening on the right side of the casing 1, thereby achieving a good heat dissipation effect on the motor assembly 3.

[0034] In the present disclosure, Figure 6 and Figure 7 As shown, the blades on the centrifugal impeller 8 are divided into large blades and small blades, and the large blades and the small blades are arranged alternately. When in use, the motor assembly 3 can be powered on. When the motor assembly 3 is working, it will drive the centrifugal impeller 8 to rotate at high speed through the rotating shaft. When the centrifugal impeller 8 rotates, the large blades and small blades on its outer side will push the air toward the volute 6, and the large blades and the small blades can cooperate to increase the air circulation.

[0035] In the present disclosure, Figure 2 and Figure 7 As shown, eleven annular protrusions are arranged at the bottom of the centrifugal impeller 8, and eleven corresponding annular grooves are also arranged on the right side of the adapter flange 7. After the assembly of the device, the annular protrusions at the bottom of the centrifugal impeller 8 will be tightly fitted with the annular grooves on the right side of the adapter flange 7, which can prevent external water vapor from entering the motor assembly 3 to cause corrosion to the electronic components, and will not affect the normal rotation of the centrifugal impeller 8. The air sealing method will not generate a large amount of heat due to friction, and it is not easy to age and fail.

[0036] Embodiment 2, based on embodiment 1, as Figures 1 - 7 As shown, a guide cover is installed on the left side of the casing 1, the heat dissipation blades 9 are located in the guide cover, and the heat dissipation channels between the reinforcing ribs 4 are connected to the cavity in the guide cover on the left side of the casing 1. The casing 1 is also an aluminum alloy shell. When the motor assembly 3 is working, it will also drive the heat dissipation blades 9 to rotate at high speed through the rotating shaft. When the heat dissipation blades 9 rotate, they will be sucked into the inside through the opening on the left side of the guide cover installed on the left side of the casing 1, and then the air will be pushed into the heat dissipation channels between the reinforcing ribs 4. The aluminum alloy shell is resistant to oxidation and corrosion, has good thermal conductivity and fast heat dissipation.

[0037] Working principle of this embodiment: When installing this centrifugal fan, the anchor feet 2 can be fixed in cooperation with bolts, and then the motor assembly 3 is connected to an external controller and power supply. When in use, the motor assembly 3 can be powered on and started. When the motor assembly 3 works, it will drive the centrifugal impeller 8 to rotate at a high speed through the rotating shaft. When the centrifugal impeller 8 rotates, the large blades and small blades on its outer side will push the air towards the volute 6. Moreover, the curly blades can play a role in noise reduction, and the cooperation of the large blades and small blades can increase the air flow rate. Then the air will be blown out through the opening on the volute 6. And after this device is assembled, the annular protrusion at the bottom of the centrifugal impeller 8 will be closely fitted with the annular groove on the right side of the adapter flange 7, which can prevent external water vapor from entering the inside of the motor assembly 3 and corroding the electronic components, and will not affect the normal rotation of the centrifugal impeller 8. Using the air seal method will not generate a large amount of heat due to friction, is not easy to age and fail. Moreover, when the motor assembly 3 works, it will also drive the cooling fan blade 9 to rotate at a high speed through the rotating shaft. When the cooling fan blade 9 rotates, it will suck air into its inner side through the opening on the left side of the guide cover installed on the left side of the housing 1, and then will push the air into the heat dissipation channels between the reinforcing ribs 4. The heat generated when the motor assembly 3 works will be transferred to the long strip-shaped plate structure and the heat dissipation ribs 5 on the outside of the reinforcing ribs 4. When the air flows to the right in the heat dissipation channels between the reinforcing ribs 4, it can adsorb the heat on the long strip-shaped plate structure and the heat dissipation ribs 5 on the outside of the reinforcing ribs 4. Finally, the air that has adsorbed the heat will be discharged out through the opening on the right side of the housing 1, so as to play a good role in cooling the motor assembly 3.

[0038] In this article, the following points need to be noted:

[0039] 1. The attached drawings of the embodiments of this disclosure only relate to the structures involved in the embodiments of this disclosure, and other structures can refer to the general design.

[0040] 2. Without conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0041] The above is only the specific implementation manner of this disclosure, but the protection scope of this disclosure is not limited thereto. Any person skilled in the art in the technical field disclosed by this disclosure can easily think of changes or substitutions within the technical scope disclosed by this disclosure, and all should be covered by the protection scope of this disclosure. Therefore, the protection scope of this disclosure should be subject to the protection scope of the claims.

Claims

1. High-speed centrifugal fan, including: The housing (1) is characterized in that: A group of feet (2) are arranged at the bottom of the casing (1); a motor assembly (3) is installed inside the casing (1); eight reinforcing ribs (4) are arranged in a ring shape on the outside of the motor assembly (3); eight groups of heat dissipation ribs (5) are also arranged in a ring shape on the outside of the motor assembly (3); a transfer flange (7) is installed on the right side of the motor assembly (3); a volute (6) is installed on the right side of the transfer flange (7); a centrifugal impeller (8) is installed on the outside of the right end of the rotating shaft of the motor assembly (3); and a heat dissipation fan blade (9) is installed on the outside of the left end of the rotating shaft of the motor assembly (3).

2. The high-speed centrifugal fan according to claim 1, characterized in that: The centrifugal impeller (8) is made of an aluminum alloy structure. A plurality of blades are arranged on the centrifugal impeller (8), and the blades are all curled structures.

3. The high-speed centrifugal fan according to claim 1, characterized in that: The blades on the centrifugal impeller (8) are divided into large blades and small blades, and the large blades and the small blades are arranged alternately.

4. The high-speed centrifugal fan according to claim 1, characterized in that: Eleven annular protrusions are arranged at the bottom of the centrifugal impeller (8), and eleven corresponding annular grooves are also arranged on the right side of the adapter flange (7).

5. The high-speed centrifugal fan according to claim 1, characterized in that: The heat dissipation ribs (5) are long strip plate-like structures, the outer sides of the reinforcing ribs (4) are fixedly connected to the inner wall of the casing (1), and six long strip plate-like structures are also arranged on the outer sides of the reinforcing ribs (4).

6. The high-speed centrifugal fan according to claim 1, characterized in that: A total of eight heat dissipation channels are arranged between the reinforcing ribs (4) and extend through the eight heat dissipation channels, and eight groups of heat dissipation ribs (5) are arranged in the eight heat dissipation channels respectively.

7. The high-speed centrifugal fan according to claim 1, characterized in that: A deflector is installed on the left side of the casing (1), the heat dissipation blades (9) are located in the deflector, and the heat dissipation channels between the reinforcing ribs (4) are connected to the cavity in the deflector on the left side of the casing (1), and the casing (1) is also an aluminum alloy shell.

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