CN216447130U

CN216447130U - Double-turbine high-pressure centrifugal fan

Info

Publication number: CN216447130U
Application number: CN202123275747.2U
Authority: CN
Inventors: 孙新年
Original assignee: Henan Chelan Environmental Protection Technology Co ltd
Current assignee: Henan Chelan Environmental Protection Technology Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-06
Anticipated expiration: 2031-12-24

Abstract

The utility model provides a double-turbine high-pressure centrifugal fan, comprising: the inner part of the volute is connected with the motor bracket through a flexible connecting piece. The motor is fixedly arranged on the motor support, a rotating shaft is rotatably arranged in the middle of the motor, and two ends of the rotating shaft extend to two sides of the motor. The end parts of the rotating shaft, which are positioned at the two sides of the motor, are respectively provided with a turbine which is used for rotating and supplying air under the driving of the rotating shaft. The turbines arranged at the two ends of the rotating shaft are both positioned inside the volute. This centrifugal fan has inside set up many places damping structure, the transmission efficiency of the production that can greatly reduced vibration and vibration, and then has reduced the noise. In addition, the turbine and the volute air inlet are installed in a matched mode through a dynamic sealing structure, so that the air pressure can be effectively reduced to leak, the pressure inside the volute of the centrifugal fan is improved, and the air supply efficiency of the fan is improved.

Description

Double-turbine high-pressure centrifugal fan

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a double-turbine high-pressure centrifugal fan.

Background

At present, centrifugal fans in the market are widely applied and play an important role in production and life. According to different use scenes, the double-turbine centrifugal fan can provide larger air volume for users. But when using, centrifugal fan's operation can bring very big vibration and noise, has seriously influenced people's production, the quality of living environment, and the vibration can lead to centrifugal fan structure not hard up and damage, greatly reduced centrifugal fan's life. The existing centrifugal fan on the market generally reduces the vibration of the centrifugal fan by improving the precision and the installation precision of a rotating shaft, and then reduces the noise. However, although this has a certain damping effect, the lift is not large and the cost is too high. Higher costs are required to achieve further damping and noise reduction. In addition, the internal pressure of the existing centrifugal fan is low, and the phenomenon of backflow can occur, so that the air supply efficiency of the fan is greatly reduced.

Therefore, a centrifugal fan with a simple structure, vibration reduction, noise reduction, low cost, high air supply efficiency and a pressurization structure is needed in the field.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a double-turbine high-pressure centrifugal fan to solve the problems of strong fan vibration, high noise, low internal pressure, high manufacturing cost and the like in the prior art.

The utility model provides a double-turbine high-pressure centrifugal fan, comprising: the inner part of the volute is connected with the motor bracket through a flexible connecting piece; a motor is fixedly arranged on the motor bracket, a rotating shaft is rotatably arranged in the middle of the motor, and two ends of the rotating shaft extend to two sides of the motor; the end parts of the rotating shaft, which are positioned at the two sides of the motor, are respectively provided with a turbine which is used for rotating and supplying air under the driving of the rotating shaft; the turbines arranged at the two ends of the rotating shaft are located inside the volute.

Furthermore, the flexible connecting piece is a cylindrical body, the middle of the flexible connecting piece is provided with a central fixing hole, and the outer wall of the flexible connecting piece is provided with an annular groove; the two end faces and the side walls of the flexible connecting piece and the two side walls of the annular groove are provided with milk nails for reducing the transmission efficiency of vibration.

Furthermore, the motor support is provided with a plurality of connecting lugs, fixing columns are fixedly arranged on the connecting lugs, and the fixing columns penetrate through a central fixing hole of the flexible connecting piece and are used for fixing the flexible connecting piece on the fixing columns; the outer wall of the flexible connecting piece is provided with an annular groove, and the fixed clamping piece on the volute is clamped in the annular groove.

In a particular embodiment of the utility model, the turbine comprises: the wheel hub is arranged at the end part of the rotating shaft; a plurality of said blades are evenly distributed around said hub; the rim is located on the periphery of the blades and used for fixing the blades.

Further, the turbine is installed at the end of the rotating shaft, wherein a clamp spring is arranged on one side, close to the end of the rotating shaft, of the hub and used for axially limiting the hub; the other side of the hub is provided with a spring, the spring sleeve is arranged outside the rotating shaft, and one end, far away from the hub, of the spring is limited by the clamp spring arranged on the rotating shaft and used for providing elastic supporting force for the turbine.

In a specific embodiment of the utility model, two ends of the rotating shaft are D-shaped sections, and the hub is fixedly connected with the end of the rotating shaft through a D-shaped shaft sleeve to keep the rotating shaft and the turbine to rotate synchronously.

In one embodiment of the utility model, the volute comprises an upper shell and a lower shell, and the upper shell is connected with the lower shell in a buckling or screw mode; the lower shell is an integrated shell, the upper shell is a three-section shell, and the three-section shell correspondingly covers the motor support in the middle and the turbines on the two sides respectively.

In one embodiment of the utility model, the volute comprises an upper shell and a lower shell, and the upper shell is connected with the lower shell in a buckling or screw mode; the upper shell and the lower shell are integrated shells and cover the motor support and the turbines on two sides of the motor support.

In an embodiment of the present invention, a U-shaped groove ring is disposed on an outer edge of the rim, which is close to the air inlet of the volute, of the turbine, and the air inlet of the volute is provided with a sealing ring, which extends into the U-shaped groove ring and is used for realizing dynamic sealing in cooperation with the U-shaped groove ring.

In an embodiment of the present invention, the rim of the air inlet of the volute is provided with a sealing ring, the sealing ring extends obliquely towards the inside of the volute, covers the upper portion of the rim, and is not in contact with the rim, so as to realize dynamic sealing between the volute and the turbine.

According to the above embodiments, the double-turbine high-pressure centrifugal fan provided by the utility model has the following advantages. Compared with the existing centrifugal fan, the centrifugal fan is internally provided with a plurality of vibration reduction structures, so that the vibration generation and the vibration transmission efficiency can be greatly reduced, the noise is reduced, and the service life of the fan is prolonged. In addition, the outer ring of the turbine and the air port of the volute are installed in a matched mode through a dynamic sealing structure, so that the air pressure can be effectively reduced from leaking, the pressure inside the volute of the centrifugal fan is improved, and the air supply efficiency is improved. The floating turbine can be self-adaptive to position adjustment according to the rotating speed and the pressure, and the problems of rigid connection and assembly precision are avoided, so that the turbine vibrates during rotation.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic structural diagram of a first embodiment of a dual-turbine high-pressure centrifugal fan provided by the present invention.

Fig. 2 is an outline structural view of a first embodiment of the twin-turbine high-pressure centrifugal fan provided by the present invention.

Fig. 3 is an enlarged view of a point a in the first embodiment of the twin-turbine high-pressure centrifugal fan according to the present invention.

Fig. 4 is a side sectional view of a first embodiment of a twin-turbine high-pressure centrifugal fan according to the present invention.

Fig. 5 is a schematic structural diagram of a second embodiment of the twin-turbine high-pressure centrifugal fan provided by the present invention.

Fig. 6 is a schematic structural diagram of a third embodiment of the double-turbine high-pressure centrifugal fan provided by the utility model.

Fig. 7 is an outline structural view of a third embodiment of the twin-turbine high-pressure centrifugal fan provided by the present invention.

Fig. 8 is a schematic structural diagram of a fourth embodiment of the twin-turbine high-pressure centrifugal fan provided by the present invention.

Fig. 9 is a structural view of a motor bracket of the twin-turbine high-pressure centrifugal fan according to the present invention.

Description of reference numerals:

1-volute, 2-flexible connecting piece, 3-motor bracket, 4-motor, 5-rotating shaft, 6-turbine, 7-snap spring, 8-spring and 9-D-shaped shaft sleeve;

11-an upper shell, 12-a lower shell, 13-a sealing ring, 14-a sealing ring, 15-a fixing fastener, 21-a nipple, 31-a connecting lug, 32-a fixing column, 33-a heat dissipation hole, 61-a hub, 62-a blade, 63-a rim and 64-a U-shaped groove ring.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the utility model, the detailed description should not be construed as limiting the utility model but as a more detailed description of certain aspects, features and embodiments of the utility model.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.

The utility model provides a double-turbine high-pressure centrifugal fan, as shown in fig. 1, which is an embodiment of the utility model, and in a specific embodiment of the embodiment, the turbine fan comprises: the middle position in the volute 1 and the volute 1 is connected with a motor bracket 3 through a flexible connecting piece 2. As shown in FIG. 4, the scroll 1 and the motor support 3 are flexibly connected through the plurality of flexible connecting pieces 2, so that the vibration is greatly reduced and is transmitted to the scroll 1 from the motor support 3, and the noise reduction effect is realized. The motor support 3 is fixedly provided with a motor 4, the middle of the motor 4 is rotatably provided with a rotating shaft 5, and two ends of the rotating shaft 5 extend to two sides of the motor 4. The end parts of the rotating shaft 5, which are positioned at the two sides of the motor 4, are respectively provided with a turbine 6 for rotating and supplying air under the driving of the rotating shaft 5. The turbines 6 arranged at the two ends of the rotating shaft 5 are positioned inside the volute 1. In this embodiment, as shown in fig. 2, the volute 1 includes an upper casing 11 and a lower casing 12, and the upper casing 11 and the lower casing 12 are connected by a snap or a screw. In addition, the lower casing 12 is an integrated casing, and the upper casing 11 is a three-section casing, which respectively covers the middle motor support 3 and the turbines 6 on both sides. Air inlet can be realized at both sides of the two turbines 6 at both ends of the rotating shaft 5, namely both sides of each turbine 6 are air inlets.

In a specific embodiment of this embodiment, as shown in fig. 3, the flexible connecting member 2 is a cylindrical body having a central fixing hole in the middle and an annular groove in the outer wall. In addition, both end surfaces, side walls of the flexible connecting member 2 and both side walls of the annular groove are provided with milk nails 21 for reducing the transmission efficiency of vibration.

As shown in fig. 9, the motor bracket 3 has a plurality of engaging lugs 31, and the engaging lugs 31 are fixedly provided with fixing posts 32. The motor bracket 3 is also provided with a plurality of heat dissipation holes 33, and the heat dissipation holes 33 are used for dissipating heat for the motor 4, so that the fault caused by overhigh temperature is avoided.

In the specific implementation of this embodiment, the fixing post 32 passes through the central fixing hole of the flexible connector 2, and is used for fixing the flexible connector 2 on the fixing post 32. Specifically, the end of the fixing column 32 is provided with a screw, and the flexible connecting piece 2 is fixed on the fixing column 32 through the screw, so that the flexible connecting piece 2 is prevented from falling off from the fixing column 32.

In the specific implementation manner of this embodiment, an annular groove is formed in the outer wall of the flexible connecting member 2, and the fixing clip 15 on the volute 1 is clamped in the annular groove, so as to flexibly connect the volute 1 to the motor bracket 3.

When the flexible connecting piece 2 is connected with the scroll 1 and the motor support 3, the end part milk nail 21 of the flexible connecting piece 2 contacts the connecting lug 31 on the motor support 3, the milk nail 21 on the side wall of the annular groove of the flexible connecting piece 2 contacts the fixed clamping piece 15, and the milk nail 21 on the side wall of the flexible connecting piece 2 contacts the inner wall of the scroll 1. The contact area of the milk nail 21 is small and the transmission of the vibration is greatly impaired, so that the milk nail 21 can further reduce the transmission of the vibration in the contact where the flexible member damps the vibration.

In addition, in the embodiment of the present invention, the fixing posts 32 extend to both sides of the connecting lug 31, and the flexible connecting members 2 may be disposed on the fixing posts 32 on both sides simultaneously or the flexible connecting members 2 may be disposed on only one fixing post 32.

In another embodiment, the fixing post 32 extends to one side of the connecting ear 31, and the flexible connecting member 2 is disposed on the fixing post 32.

In a specific embodiment of the present embodiment, the turbine 6 includes: hub 61, blades 62 and rim 63. Wherein, wheel hub 61 is installed at the tip of pivot 5, and wheel hub 61 is installed to the both ends of pivot 5 promptly. A plurality of blades 62 are evenly distributed around the hub 61. The rim 63 is located at the periphery of the blades 62 for fixing the blades 62.

The turbine 6 is installed at the end of the rotating shaft 5 in this embodiment. Wherein, the one side that wheel hub 61 is close 5 tip of pivot is provided with jump ring 7 for carry out axial spacing to wheel hub 61. The other side of wheel hub 61 is provided with spring 8, and spring 8 cover is in the outside of pivot 5, and spring 8 keeps away from the one end of wheel hub 61 and carries on spacingly through setting up jump ring 7 on pivot 5 for provide the elastic support power for turbine 6. Specifically, two ends of the rotating shaft 5 are D-shaped in cross section, and the hub 61 is fixedly connected with the end of the rotating shaft 5 through a D-shaped shaft sleeve 9, so as to keep the rotating shaft 5 and the turbine 6 to rotate synchronously. When the turbine 6 rotates, under the action of the elastic force of the spring 8, the turbine 6 can realize axial displacement of a certain distance on the rotating shaft 5, so that the turbine can adapt to different working environments and rotating speeds when rotating. And the self-adaptive position adjustment can further reduce the vibration generated when the turbine 6 rotates, and further reduce the noise.

In the specific implementation manner of this embodiment, the outer edge of the rim 63 on the turbine 6 near the air inlet of the volute 1 is provided with a U-shaped groove ring 64, the air inlet of the volute 1 is provided with a sealing ring 13, and the sealing ring 13 extends into the U-shaped groove ring 64 for realizing dynamic sealing by matching with the U-shaped groove ring 64. In this embodiment, the air inlet of the volute 1 is formed on both sides of each turbine 6, so that the rim 63 on both sides of each turbine 6 is provided with a U-shaped groove ring 64. Correspondingly, the edges of the air inlets on the two sides of the turbine 6 are provided with sealing rings 13, and the sealing rings 13 are matched with the U-shaped groove rings 64 to realize dynamic sealing. This move seal structure can be fine prevent that the inside atmospheric pressure of volute from revealing, prevent that the air current from leaking between volute 1 and wheel rim 63, further promote the air supply efficiency of fan.

In the embodiment shown in fig. 5, the difference between this embodiment and the embodiment shown in fig. 1 is that the air inlet of the volute 1 has no sealing ring 13, and the rim outer edge has no U-shaped groove ring 64. Instead, a sealing ring 14 is arranged at the side of the air inlet of the volute 1, the sealing ring 14 extends obliquely towards the interior of the volute 1, and the sealing ring 14 covers the upper part of the rim 63 and is not in contact with the rim 63, i.e. the sealing ring 14 is overlapped with the rim 63 on the axial projection, so as to realize the dynamic sealing between the volute 1 and the turbine 6.

In the embodiment shown in fig. 6, the difference between the embodiment and the embodiment shown in fig. 5 is that in the embodiment, the volute 1 shown in fig. 7 comprises an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 are connected by a snap or a screw. And the upper shell 11 and the lower shell 12 are both integrated shells, and cover the middle motor bracket 3 and the turbines 6 at two sides. Only two ends of the volute 1 are provided with air inlets, and one sides of the two turbines 6 close to the air inlets are in dynamic sealing with the sealing rings 14 at the air inlets.

In the embodiment shown in fig. 8, the difference between this embodiment and the embodiment shown in fig. 6 is that in this embodiment, the sealing ring 14 is not provided at the inlet of the scroll 1. The outer edge of the rim 63 on the turbine 6 close to the air inlet of the volute 1 is provided with a U-shaped groove ring 64, the air inlet of the volute 1 is provided with a sealing ring 13, and the sealing ring 13 extends into the U-shaped groove ring 64 and is used for being matched with the U-shaped groove ring 64 to realize dynamic sealing. This move seal structure can be fine prevent that the inside atmospheric pressure of volute from revealing, prevent that the air current from leaking between volute 1 and wheel rim 63, further promote the air supply efficiency of fan.

The foregoing is merely an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. Double-turbine high-pressure centrifugal fan, its characterized in that, this centrifugal fan includes: the inner part of the volute (1) is connected with the motor support (3) through a flexible connecting piece (2);

a motor (4) is fixedly arranged on the motor support (3), a rotating shaft (5) is rotatably arranged in the middle of the motor (4), and two ends of the rotating shaft (5) extend to two sides of the motor (4);

the end parts of the rotating shaft (5) positioned at two sides of the motor (4) are respectively provided with a turbine (6) which is used for rotating and supplying air under the driving of the rotating shaft (5);

the turbines (6) arranged at the two ends of the rotating shaft (5) are located inside the volute (1).

2. Double-turbine high-pressure centrifugal fan according to claim 1, wherein the flexible connector (2) is a cylindrical body with a central fixing hole in the middle and an annular groove on the outer wall;

two end faces and side walls of the flexible connecting piece (2) and two side walls of the annular groove are provided with milk nails (21) for reducing the transmission efficiency of vibration.

3. The twin-turbine high-pressure centrifugal fan according to claim 2, wherein the motor bracket (3) is provided with a plurality of connecting lugs (31), a fixing column (32) is fixedly arranged on each connecting lug (31), and the fixing column (32) passes through a central fixing hole of the flexible connecting piece (2) and is used for fixing the flexible connecting piece (2) on the fixing column (32);

the outer wall of the flexible connecting piece (2) is provided with an annular groove, and a fixing clamping piece (15) on the volute casing (1) is clamped in the annular groove.

4. Twin-turbine high-pressure centrifugal fan according to claim 1, characterised in that the turbine (6) comprises: a hub (61), blades (62) and a rim (63), wherein,

the hub (61) is arranged at the end part of the rotating shaft (5); a plurality of said blades (62) being evenly distributed around said hub (61); the rim (63) is located at the periphery of the blades (62) and used for fixing the blades (62).

5. The twin-turbine high-pressure centrifugal fan according to claim 4, wherein the turbine (6) is mounted at the end of the rotating shaft (5), and a clamp spring (7) is arranged on one side of the hub (61) close to the end of the rotating shaft (5) and used for axially limiting the hub (61);

the other side of wheel hub (61) is provided with spring (8), spring (8) cover is in the outside of pivot (5), spring (8) are kept away from the one end of wheel hub (61) is in through setting up jump ring (7) are spacing in pivot (5) for turbine (6) provide elastic support power.

6. The double-turbine high-pressure centrifugal fan according to claim 4, wherein the two ends of the rotating shaft (5) are D-shaped in cross section, and the hub (61) is fixedly connected with the end of the rotating shaft (5) through a D-shaped shaft sleeve (9) for keeping the rotating shaft (5) and the turbine (6) to rotate synchronously.

7. The twin-turbine high-pressure centrifugal fan according to claim 4, wherein the volute (1) comprises an upper shell (11) and a lower shell (12), and the upper shell (11) and the lower shell (12) are connected in a snap fit or screw manner;

the lower shell (12) is an integrated shell, the upper shell (11) is a three-section shell, and the middle motor support (3) and the turbines (6) on the two sides are correspondingly covered respectively.

8. The twin-turbine high-pressure centrifugal fan according to claim 4, wherein the volute (1) comprises an upper shell (11) and a lower shell (12), and the upper shell (11) and the lower shell (12) are connected in a snap fit or screw manner;

the upper shell (11) and the lower shell (12) are all integrated shells and cover the motor support (3) and the turbines (6) on two sides of the motor support (3).

9. The twin-turbine high-pressure centrifugal fan according to claim 7 or 8, wherein the outer edge of the rim (63) of the turbine (6) close to the air inlet of the volute (1) is provided with a U-shaped groove ring (64), the air inlet of the volute (1) is provided with a sealing ring (13), and the sealing ring (13) extends into the U-shaped groove ring (64) and is used for realizing dynamic sealing in cooperation with the U-shaped groove ring (64).

10. The twin-turbine high-pressure centrifugal fan according to claim 7 or 8, wherein the inlet edge of the volute (1) is provided with a sealing ring (14), and the sealing ring (14) extends obliquely towards the inside of the volute (1), covers the upper part of the rim (63) and is not in contact with the rim (63) for realizing the dynamic sealing of the volute (1) and the turbine (6).