CN217735793U

CN217735793U - Single duct double-impeller fan structure

Info

Publication number: CN217735793U
Application number: CN202221951990.3U
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: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-11-04
Anticipated expiration: 2032-07-27

Abstract

The utility model provides a single duct bilobed wheel fan structure, this fan structure includes: the casing is provided with the motor support through flexible mounting in the casing. The motor bracket is provided with a rotating shaft mounting hole, and a rotating shaft is fixedly connected in the rotating shaft mounting hole through a bearing. The motor support is provided with a motor, and the motor is connected with the rotating shaft and used for driving the rotating shaft to rotate. The rotating shaft is coaxially provided with a first impeller and a second impeller which are used for rotating and supplying air. The air outlet of the shell is provided with a fairing, and the inner diameter of the fairing is gradually reduced along the air outlet direction and is used for pressurization and air flow adjustment. And dynamic sealing structures are arranged between the first impeller and the shell and/or between the second impeller and the fairing. This fan structure adopts the design of bilobed wheel can effectual promotion casing inside atmospheric pressure, adopts between impeller and the casing to move seal structure, and the effectual pressure release of avoiding promotes air supply efficiency. In addition, the flexible fixing piece can reduce the transmission efficiency of vibration, and further reduce noise generated by vibration.

Description

Single duct double-impeller fan structure

Technical Field

The utility model relates to a fan technical field specifically is single duct bilobed wheel fan structure.

Background

The application of the fan is more and more extensive in the existing production life, especially in summer along with the rise of the temperature, the use of the fan in the family life is also gradually increased, and the fan plays an important role in relieving summer heat. According to the production and living needs, the market has higher and higher requirements on the fan, and not only the low noise of the fan but also the high wind speed of the fan are ensured. The prior art fan achieves large air volume by increasing the rotating speed. However, when the rotating speed of the rotating fan is increased, the rotating shaft and the blades of the fan often vibrate, the vibration can generate noise and even damage fan structural members, and the user experience is greatly reduced. In the prior art, high rotating speed and low vibration are realized by improving production and assembly precision, but the cost of the fan is greatly improved. In addition, when the fan in the prior art rotates, the pressure relief condition is easy to occur between the impeller and the frame, and the air supply efficiency of the fan is reduced.

Therefore, a fan structure with low noise, low vibration, pressure relief prevention, low cost and high blowing efficiency is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide single duct bilobed wheel fan structure to overcome the problem that the fan wind pressure among the prior art is little, the noise is big, the vibration is strong, air supply efficiency is low and with high costs.

The utility model provides a single duct bilobed wheel fan structure, this fan structure includes: the motor support is arranged in the shell through a flexible fixing piece; the motor bracket is provided with a rotating shaft mounting hole, and a rotating shaft is fixedly connected in the rotating shaft mounting hole through a bearing; the motor bracket is provided with a motor, and the motor is connected with the rotating shaft and is used for driving the rotating shaft to rotate; the rotating shaft is coaxially provided with a first impeller and a second impeller which are used for rotating and supplying air; a fairing is arranged at the air outlet of the shell, and the inner diameter of the fairing is gradually reduced along the air outlet direction and is used for supercharging and airflow adjustment; and a dynamic sealing structure is arranged between the first impeller and the shell and/or between the second impeller and the fairing.

Further, the first impeller includes: the wheel comprises a first hub, a first blade and a first rim, wherein the center of the first hub is provided with a through hole for fixedly connecting the rotating shaft; the blade roots of the first blades are uniformly connected to the outer wall of the first hub along the circumferential direction and are used for rotating and supplying air under the driving of the first hub; the first wheel rim is surrounded on the periphery of the first blades, and the inner wall of the first wheel rim is connected with the blade tips of the first blades; and the first wheel rim is provided with a first booster ring, and the first booster ring and the extension part of the inner wall of the shell form a dynamic sealing structure.

Further, the second impeller includes: the center of the second hub is provided with a through hole for fixedly connecting the rotating shaft; the blade roots of the second blades are uniformly connected to the outer wall of the second hub along the circumferential direction and are used for rotating and supplying air under the driving of the second hub; the second wheel rim is surrounded on the periphery of the second blade, and the inner wall of the second wheel rim is connected with the blade tip of the second blade; and the second wheel rim is provided with a second booster ring, and the second booster ring and the inner wall of the fairing form a dynamic sealing structure.

Furthermore, a rectifying ring is arranged in the rectifying cover, and the inner diameter of the rectifying ring is gradually reduced along the air outlet direction and is used for supercharging and airflow adjustment; and one end of the rectifying ring, which is close to the second rim, is provided with an extension part, and the extension part and the second booster ring form a dynamic sealing structure.

Furthermore, the outer wall of the rectifying ring is provided with reinforcing ribs for improving the structural strength of the rectifying ring.

The utility model discloses an among the embodiment, radome fairing air outlet department is provided with a plurality of water conservancy diversion muscle along radially outwards extending by the axle center for the air current water conservancy diversion.

Furthermore, a flow guide column is arranged at the axis of the fairing and used for guiding airflow.

In an embodiment of the present invention, the housing includes a front housing and a rear housing, wherein the front housing is connected to the rear housing in a snap-fit manner, the front housing is located near an air outlet of the fan, and the rear housing is located at the air inlet; the front shell is circumferentially provided with an air inlet grille, and the side wall of the rear shell and the air inlet end are both provided with air inlet grilles for air flow to enter.

Further, the front shell is provided with a plurality of rectifying ribs which extend to the inner wall of the front shell from the axis along the radial direction and are used for guiding airflow.

In an embodiment of the present invention, the flexible fixing member has a fixing hole, the position of the housing or the motor bracket corresponding to the flexible fixing member has a limiting post, and the limiting post is inserted into the fixing hole and is used for fixedly connecting the limiting post with the flexible fixing member through a screw;

the flexible fixing piece side wall is provided with an annular fixing groove used for clamping the shell or the motor support.

According to the above embodiment, the present invention provides a single duct dual impeller fan structure, which has the following advantages: compared with the prior art, the dynamic seal structure is adopted between the impeller and the shell in the fan structure, so that the pressure release can be effectively avoided when the fan rotates, the wind speed is increased under the same rotating speed, and the air supply efficiency is greatly improved. The flexible fixing piece is arranged, so that the transmission efficiency of vibration can be greatly reduced, and the noise generated by vibration is reduced. The manufacturing cost of the fan can be controlled while reducing vibration and noise in a simple manner. In addition, the double-impeller structural design can effectively improve the air pressure in the shell and improve the air speed of the air outlet.

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 invention, as claimed.

Drawings

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

Fig. 1 is a structural diagram of a first embodiment of a single-duct dual-impeller fan structure provided by the present invention.

Fig. 2 is an exploded view of a first embodiment of the single duct twin-impeller fan according to the present invention.

Fig. 3 is a structural diagram of a second embodiment of the single duct dual impeller fan structure provided by the present invention.

Fig. 4 is an exploded view of a second embodiment of the single duct dual impeller fan structure provided by the present invention.

Fig. 5 is a structural diagram of a third embodiment of the single duct double-impeller fan structure provided by the present invention.

Fig. 6 is a structural diagram of a front housing in a third embodiment of the single duct dual impeller fan structure provided by the present invention.

Fig. 7 is a structural view of a first embodiment of a single-duct single-blade fan.

FIG. 8 is a block diagram of a second embodiment of a single duct, single blade fan.

Description of reference numerals:

the structure of the motor comprises a shell, a flexible fixing piece 2, a motor support 3, a bearing 4, a rotating shaft 5, a motor 6, a first impeller 7, a second impeller 8, a fairing 9, a first hub 10, a first blade 11, a first rim 12, a second hub 13, a second blade 14, a second rim 15, a first booster ring 16, a second booster ring 17, a rectifier ring 18, a reinforcing rib 19, a flow guiding rib 20, a flow guiding column 21, a front shell 22, a rear shell 23, a rectifying rib 24, a limiting column 25 and a limiting shaft sleeve 26.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the present invention, which should not be considered limiting of the invention, but rather should be construed as providing more detailed descriptions of certain aspects, features and embodiments of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the 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 single duct bilobed wheel fan structure, as shown in figure 1 for the structural schematic diagram of this fan structure embodiment one. In a specific embodiment, the utility model discloses an among, this fan structure includes: casing 1, casing 1's lateral wall a week and air intake department all are provided with air-inlet grille for the increase area of admitting air. A motor bracket 3 is arranged in the shell 1 through a flexible fixing piece 2. The motor support 3 is not in direct contact with the shell 1, and is flexibly connected through the flexible fixing piece 2, so that the transmission efficiency of vibration is reduced.

The motor bracket 3 is provided with a rotating shaft mounting hole, and a rotating shaft 5 is fixedly connected in the rotating shaft mounting hole through a bearing 4. The motor support 3 is provided with a motor 6, and the motor 6 is connected with the rotating shaft 5 and used for driving the rotating shaft 5 to rotate. Specifically, the motor rotor is fixed on the rotating shaft 5, and acts with the motor stator inside the motor 6 to drive the motor rotor to rotate, so as to drive the rotating shaft 5 to rotate. The rotating shaft 5 is coaxially provided with a first impeller 7 and a second impeller 8 for rotating and supplying air. The section of the position of the rotating shaft 5 for fixing the first impeller 7 and the second impeller 8 is non-circular, and is used for ensuring that the rotating shaft 5 rotates synchronously with the first impeller 7 and the second impeller 8. In this embodiment, the impeller near the fast-forward air inlet of the fan is a first impeller 7, and the impeller near the air outlet is a second impeller 8.

In one embodiment of the present invention, as shown in fig. 1, the first impeller 7 and the second impeller 8 are respectively located at both sides of the motor 6.

In another embodiment of the present invention, as shown in fig. 3, the first impeller 7 and the second impeller 8 are both located at one side of the motor 6 and located at one side close to the air outlet of the casing 1. In this embodiment, the rotating shaft 5 is further sleeved with a limiting shaft sleeve 26, and the limiting shaft sleeve 26 is located between the first impeller 7 and the second impeller 8 and used for limiting the position between the first impeller 7 and the second impeller 8 and preventing the first impeller 7 and the second impeller 8 from contacting.

Furthermore, a fairing 9 is arranged at an air outlet of the shell 1, and the inner diameter of the fairing 9 is gradually reduced along the air outlet direction and is used for pressurization and air flow adjustment. Along the direction that the air current flows, the 9 internal diameters of radome fairing reduce gradually and can promote the casing 1 and the atmospheric pressure in the 9 cavity of radome fairing, are favorable to promoting the air-out speed of fan.

Dynamic sealing structures are arranged between the first impeller 7 and the shell 1 and/or between the second impeller 8 and the fairing 9.

Specifically, in one embodiment, the rim of the first impeller 7 forms a dynamic seal with the interior of the housing 1.

In one embodiment, a dynamic seal is provided between the rim of the second impeller 8 and the fairing 9.

In one embodiment, the rim of the first impeller 7 forms a dynamic seal with the interior of the casing 1, and a dynamic seal is provided between the rim of the second impeller 8 and the fairing 9.

In a specific embodiment of the present invention, the first impeller 7 includes: a first hub 10, first blades 11 and a first rim 12. Wherein, the first hub 10 has a through hole in the center for fixedly connecting the rotating shaft 5. Specifically, the through hole is a non-circular hole and corresponds to the cross section of the rotating shaft 5, so as to ensure that the first impeller 7 can rotate synchronously with the rotating shaft 5.

The blade roots of the first blades 10 are uniformly connected to the outer wall of the first hub 10 along the circumferential direction, and are used for rotating and blowing air under the driving of the first hub 10.

The first rim 12 surrounds the outer periphery of the first blades 11, and the inner wall of the first rim 12 is connected with the blade tips of the first blades 11. Specifically, the blade root of the first blade 11 and the first hub 10 are integrally arranged, the blade tip of the first blade 11 and the inner wall of the first rim 12 are integrally arranged, the strength of the blade can be furthest ensured by the integral arrangement, the first blade 11 is prevented from deforming when the first impeller 7 rotates, and then the air supply efficiency is reduced. In addition, the first blade 11 can be prevented from shaking when the first impeller 7 rotates, so that the vibration of the impeller caused by shaking is avoided, and the noise is reduced.

The first rim 12 is provided with a first booster ring 16, and the first booster ring 16 and the extension part of the inner wall of the casing 1 form a dynamic sealing structure. An annular dynamic seal groove is formed in the extension part of the inner wall of the shell 1, and the first booster ring 16 extends into the dynamic seal groove to jointly form a dynamic seal structure. The dynamic sealing structure increases the path and the corner times of gas circulation, further reduces gas leakage, keeps the gas pressure inside the shell 1 from leaking, and achieves the purpose of dynamic sealing.

Further, the second impeller 8 includes: a second hub 13, second vanes 14 and a second rim 15, wherein,

the second hub 13 has a through hole in the center for fixedly connecting the rotating shaft 5. Specifically, the through hole is a non-circular hole and corresponds to the cross section of the rotating shaft 5, so as to ensure that the second impeller 8 can rotate synchronously with the rotating shaft 5.

The blade roots of the second blades 14 are uniformly connected to the outer wall of the second hub 13 along the circumferential direction and are used for rotating and supplying air under the driving of the second hub 13;

the second rim 15 surrounds the outer periphery of the second blade 14, and the inner wall of the second rim 15 is connected with the blade tip of the second blade 14. Specifically, the blade root of the second blade 14 and the second hub 13 are integrally arranged, the blade tip of the second blade 12 and the inner wall of the second rim 15 are integrally arranged, the strength of the blades can be furthest ensured by integrally arranging, the second blade 14 is prevented from being deformed when the second hub 8 rotates, and then the air supply efficiency is reduced. In addition, the second blade 14 can be reduced from shaking when the second impeller 8 rotates, so that the impeller vibration caused by shaking is avoided, and the noise is reduced.

The second wheel rim 15 is provided with a second booster ring 17, and the second booster ring 17 and the inner wall of the fairing 9 form a dynamic sealing structure. The dynamic sealing structure increases the path and the corner times of gas circulation, further reduces gas leakage, keeps the gas pressure inside the shell 1 from leaking, and achieves the purpose of dynamic sealing.

Further, as shown in fig. 2, a fairing 18 is arranged inside the fairing 9, and the inner diameter of the fairing 18 is gradually reduced along the air outlet direction, so as to be used for supercharging and airflow adjustment.

One end of the rectifying ring 18 close to the second rim 15 is provided with an extension part, and the extension part and the second booster ring 17 form a dynamic sealing structure. An extension part on the rectifying ring 18 forms an annular dynamic seal groove, and the second booster ring 17 extends into the dynamic seal groove to jointly form a dynamic seal structure. The dynamic sealing structure increases the path and the corner times of gas circulation, further reduces gas leakage, keeps the gas pressure inside the shell 1 from leaking, and achieves the purpose of dynamic sealing.

As shown in fig. 4, in the embodiment of the present invention, the outer wall of the rectifying ring 18 has a reinforcing rib 19 for improving the structural strength of the rectifying ring 18.

The utility model discloses an among the concrete implementation mode, 9 air outlets of radome fairing are provided with a plurality of water conservancy diversion muscle 20 along radially outwards extending by the axle center for the air current water conservancy diversion.

The utility model discloses an among the specific embodiment, 9 axle center departments of radome fairing are provided with water conservancy diversion post 21 for the air current water conservancy diversion.

In the specific embodiment of the present invention, the housing 1 includes a front housing 22 and a rear housing 23. The front casing 22 is clamped with the rear casing 23, the front casing 22 is located near an air outlet of the fan, and the rear casing 23 is located at the air inlet.

In addition, the front housing 22 has an air inlet grill around its circumference, and the side walls and the air inlet end of the rear housing 23 each have an air inlet grill for the entry of air flow.

In the embodiment shown in fig. 1, the motor bracket 3 is fixed to the front housing 22.

In the embodiment shown in fig. 3, the motor bracket 3 is fixed to the rear case 23.

As shown in fig. 6, in the embodiment of the present invention, the front housing 22 has a plurality of ribs 24, and the ribs 24 extend from the axial center to the inner wall of the front housing 22 along the radial direction for guiding the airflow.

As shown in fig. 5, in this embodiment, the structure of the rectifying rib 24 is applied, and is disposed between the first impeller 7 and the second impeller 8, and is used for guiding the airflow, preventing the airflow from being excessively disturbed in the flowing process, and reducing the generation of wind noise.

As shown in fig. 2, in this embodiment, the front housing 22 also has flow straightening ribs 24 for guiding the airflow.

The utility model discloses an among the embodiment, have the fixed orifices on the flexible mounting 2, this fixed orifices setting is in the axle center department of flexible mounting 2, and runs through flexible mounting 2. The position of the shell 1 or the motor support 3 corresponding to the flexible fixing part 2 is provided with a limiting column 25, and the limiting column 25 is inserted into the fixing hole and is used for fixedly connecting the limiting column 25 with the flexible fixing part 2 through a screw.

The side wall of the flexible fixing part 2 is provided with an annular fixing groove for clamping the shell 1 or the motor bracket 3.

In one embodiment, the housing 1 has a limiting post 25, and the limiting post 25 penetrates through the flexible fixing member 2 and is fixed with the flexible fixing member 2. The motor support 3 is clamped in an annular fixing groove in the side wall of the flexible fixing part 2, and flexible connection between the shell 1 and the motor support 3 is achieved.

In another embodiment, the motor bracket 3 has a limiting post 25, and the limiting post 25 penetrates through the flexible fixing member 2 and is fixed with the flexible fixing member 2. The fixing snap ring on the inner wall of the shell 1 is clamped in the annular fixing groove on the side wall of the flexible fixing piece 2, so that flexible connection between the shell 1 and the motor support 3 is realized.

In the embodiment shown in fig. 1, the motor bracket 3 has a stopper pin 25, and the front housing 22 is engaged in a ring-shaped fixing groove formed in the side wall of the flexible fixing member 2.

In the embodiment shown in fig. 3, the rear housing 23 has a stopper 25, and the motor bracket is engaged in a ring-shaped fixing groove formed in the side wall of the flexible fixing member 2.

Fig. 7 shows a single ducted single impeller fan configuration which differs from the embodiment shown in fig. 3 in that only one impeller is provided.

The embodiment shown in figure 8 differs from the embodiment shown in figure 7 in that the rim of the impeller does not have a dynamic seal ring structure.

The foregoing is only 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 principles of the present invention should fall within the protection scope of the present invention.

Claims

1. Single duct bilobed wheel fan structure, its characterized in that, this fan structure includes: the motor comprises a shell (1), wherein a motor support (3) is arranged in the shell (1) through a flexible fixing piece (2);

a rotating shaft mounting hole is formed in the motor support (3), and a rotating shaft (5) is fixedly connected in the rotating shaft mounting hole through a bearing (4);

a motor (6) is arranged on the motor bracket (3), and the motor (6) is connected with the rotating shaft (5) and is used for driving the rotating shaft (5) to rotate;

a first impeller (7) and a second impeller (8) are coaxially arranged on the rotating shaft (5) and are used for rotationally supplying air;

a fairing (9) is arranged at an air outlet of the shell (1), and the inner diameter of the fairing (9) is gradually reduced along the air outlet direction and is used for pressurization and air flow adjustment;

and a dynamic sealing structure is arranged between the first impeller (7) and the shell (1) and/or between the second impeller (8) and the fairing (9).

2. The single-duct twin-impeller fan structure according to claim 1, characterised in that the first impeller (7) comprises: a first hub (10), a first blade (11) and a first rim (12), wherein,

the center of the first hub (10) is provided with a through hole for fixedly connecting the rotating shaft (5);

the blade roots of the first blades are uniformly connected to the outer wall of the first hub (10) along the circumferential direction and are used for rotating and supplying air under the driving of the first hub (10);

the first wheel rim (12) surrounds the periphery of the first blades (11), and the inner wall of the first wheel rim (12) is connected with the blade tips of the first blades (11);

the first wheel rim (12) is provided with a first booster ring (16), and the first booster ring (16) and the extension part of the inner wall of the shell (1) form a dynamic sealing structure.

3. Single duct twin-impeller fan structure according to claim 1 or 2, characterised in that the second impeller (8) comprises: a second hub (13), a second blade (14) and a second rim (15), wherein,

the center of the second hub (13) is provided with a through hole for fixedly connecting the rotating shaft (5);

the blade roots of the second blades (14) are uniformly connected to the outer wall of the second hub (13) along the circumferential direction and are used for driving the second hub (13) to rotate for air supply;

the second wheel rim (15) surrounds the periphery of the second blade (14), and the inner wall of the second wheel rim (15) is connected with the blade tip of the second blade (14);

and the second wheel rim (15) is provided with a second booster ring (17), and the second booster ring (17) and the inner wall of the fairing (9) form a dynamic sealing structure.

4. The structure of a single duct twin-impeller fan according to claim 3, characterised in that a fairing (18) is provided inside the fairing (9), the inner diameter of the fairing (18) being gradually reduced in the direction of the outlet air for pressurisation and airflow regulation;

one end of the rectifying ring (18) close to the second rim (15) is provided with an extending part, and the extending part and the second booster ring (17) form a dynamic sealing structure.

5. Single ducted twin impeller fan structure in accordance with claim 4, characterized by the fact that the outer wall of the fairing (18) has stiffening ribs (19) for increasing the structural strength of the fairing (18).

6. The structure of a single duct twin-impeller fan according to claim 1, characterized in that the outlet of the cowling (9) is provided with a plurality of flow guiding ribs (20) extending radially from the axis outwards for guiding the air flow.

7. The structure of a single ducted twin-impeller fan in accordance with claim 6 characterised in that a flow guiding post (21) is provided at the hub of the cowling (9) for air flow guiding.

8. The single duct twin impeller fan structure of claim 1, wherein the casing (1) comprises a front casing (22) and a rear casing (23), wherein,

the front shell (22) is clamped with the rear shell (23), the front shell (22) is positioned close to an air outlet of the fan, and the rear shell (23) is positioned at the air inlet;

the front shell (22) is circumferentially provided with an air inlet grille, and the side wall and the air inlet end of the rear shell (23) are provided with air inlet grilles for air flow to enter.

9. The single duct twin impeller fan structure of claim 8 in which the front housing (22) has flow straightening ribs (24), a plurality of the flow straightening ribs (24) extending radially from the axial center to the inner wall of the front housing (22) for airflow diversion.

10. The structure of a single duct double impeller fan according to claim 1, characterized in that the flexible fixing member (2) has a fixing hole, the housing (1) or the motor bracket (3) has a position-limiting post (25) corresponding to the position of the flexible fixing member (2), and the position-limiting post (25) is inserted into the fixing hole for fixedly connecting the position-limiting post (25) with the flexible fixing member (2) by a screw;

the side wall of the flexible fixing piece (2) is provided with an annular fixing groove used for clamping the shell (1) or the motor bracket (3).