CN212028113U

CN212028113U - Mute noise-reducing exhaust fan

Info

Publication number: CN212028113U
Application number: CN202020561171.2U
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: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-11-27
Anticipated expiration: 2030-04-16

Abstract

The utility model provides an exhaust fan of making an uproar falls in silence, this exhaust fan includes: the device comprises a volute, a bearing suspension, a rotating shaft, a suspension damping ring, a turbine, a motor fixing support and a motor support flexible connecting piece. Wherein the bearing suspension on which the bearing is mounted is fixed to the volute. One end of the rotating shaft is fixed on a bearing on the bearing suspension, the other end of the rotating shaft is fixed on the motor fixing support through the bearing, and the rotating shaft is used for installing the turbine. The suspension damping ring is fixedly arranged between the bearing suspension and the outer ring of the bearing and used for damping. The motor fixing bracket is fixedly arranged on the volute through a motor bracket flexible connecting piece. The utility model provides an exhaust fan of making an uproar falls in silence weakens the transmission of motor vibrations through carrying out flexonics between motor structure and spiral case. Meanwhile, the exhaust fan enables the gas to flow more stably by changing the shape structure of the volute, and reduces the noise when the gas flows.

Description

Mute noise-reducing exhaust fan

Technical Field

The utility model relates to an exhaust fan technical field especially relates to the exhaust fan is fallen and make an uproar, specifically is a silence falls and falls exhaust fan.

Background

The application of the exhaust fan is very wide in the existing production and life. But the vibration and noise of the exhaust fan are often brought about due to high rotating speed and production and installation errors. Moreover, the vibration can bring certain damage to the equipment, and the noise can influence the environmental quality of production and life of people. Effectively reduce exhaust fan's running noise, will help improving the noise environment in our production and life, promote the service function and experience.

The existing exhaust fan on the market generally reduces the vibration of the exhaust fan by improving the precision of a rotating shaft and the installation precision, but the damping effect is greatly improved, but the cost is too high, and the further damping is difficult to be carried out. When the exhaust fan needs to operate at a higher speed, vibration and noise are still serious, and the high-precision rotating shaft can increase the later maintenance cost.

The utility model is directed to the above problem, reform transform the fixed mounting structure of exhaust fan and the appearance structure of exhaust fan, make the vibrations of exhaust fan reduce by a wide margin, and then reduce fan running noise and air-out noise.

Disclosure of Invention

An object of the utility model is to overcome prior art not enough, provide an exhaust fan of making an uproar falls in silence. The motor structure of the exhaust fan is flexibly connected with the volute, so that the transmission of motor vibration is weakened, and vibration noise is reduced. Meanwhile, the exhaust fan enables the gas to flow more stably by changing the shape structure of the volute, and reduces the noise when the gas flows.

The utility model provides an exhaust fan of making an uproar falls in silence, this exhaust fan includes: the device comprises a volute, a bearing suspension, a rotating shaft, a suspension damping ring, a turbine, a motor fixing support and a motor support flexible connecting piece, wherein the bearing suspension provided with a bearing is fixed on the volute; one end of the rotating shaft is fixed on the bearing suspension, the other end of the rotating shaft is fixed on the motor fixing bracket through the bearing, and the rotating shaft is used for mounting the turbine; the suspension damping ring is fixedly arranged between the bearing suspension and the outer ring of the bearing and is used for damping; and the motor fixing support is fixedly arranged on the volute through the motor support flexible connecting piece.

The utility model discloses an among the concrete implementation, this exhaust fan still includes: the turbine flexible connecting piece is fixed on the rotating shaft and used for rotating the rotating shaft; the turbine flexible connecting piece is fixed on the rotating shaft, the turbine is fixed on the turbine flexible connecting piece, and the turbine flexible connecting piece is used for damping and aligning the rotation of the turbine; and the shaft sleeve is fixed on the rotating shaft and used for limiting the bearing.

The utility model discloses an among the concrete embodiment, the motor fixed bolster is the rigid support, just be fixed with a plurality of pressure riveting double-screw bolts on the motor fixed bolster.

In a particular embodiment, the motor support flexible connector includes: the volute comprises an upper connecting piece and a lower connecting piece, wherein the upper connecting piece and the lower connecting piece are installed in a matched mode through shaft holes and are respectively located on the inner side and the outer side of the volute; the top, the bottom and the periphery of the upper connecting piece are provided with a plurality of supporting structures, the top and the periphery of the lower connecting piece are provided with a plurality of supporting structures, and the supporting structures are used for reducing the supporting area and reducing the vibration transmission.

The center of the upper connecting piece and the center of the lower connecting piece are both provided with through holes, the through holes are used for being inserted into the pressure riveting studs, and the motor fixing support is fixed on the volute through the matching of bolts and the pressure riveting studs.

The utility model discloses an among the concrete embodiment, go up the connecting piece with connecting piece inside has a plurality of buffer holes down for reduce the transmission efficiency of vibrations.

The utility model discloses an among the concrete implementation, this exhaust fan is still including setting up shell flange on the spiral case is used for the reinforcing the structural strength of spiral case.

The utility model discloses an among the concrete implementation mode, the spiral case includes spiral case and lower spiral case, go up the spiral case and carry out fixed connection through interference fit's mode with being connected of lower spiral case.

The cross section of the connecting surface of the upper volute and the lower volute is wavy and is used for flow guiding and structure enhancement.

The utility model discloses an among the concrete embodiment, have a plurality of solid fixed rings on the spiral case, it is right the spiral case is fixed, wherein, gu be provided with flexible connectors on the fixed ring, flexible connectors is used for reducing vibrations and passes through gu the efficiency that fixed ring transmitted away.

According to the above-mentioned embodiment, the utility model provides a silence exhaust fan of making an uproar has following benefit: this exhaust fan is for current exhaust fan, through using flexible connectors in the aspect of making an uproar, carries out flexonics between rotatory pieces such as motor rotor and the casing, reduces the transmission efficiency of vibration, and then noise reduction. In addition, the structure of the ventilating pipeline in the volute is changed, airflow is combed to a certain degree, the airflow flowing is more stable, and therefore the purpose of reducing wind noise is achieved. Through the combination of structure and fixed mode like this, make the utility model provides an exhaust fan noise reduction effect is outstanding more, and can greatly control the cost of making an uproar.

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 an outline view of a mute and noise reduction exhaust fan provided by the present invention.

Fig. 2 is the utility model provides a section view of a silence noise reduction exhaust fan.

Fig. 3 is an assembly view of the motor bracket flexible connector of the noise-reduction exhaust fan provided by the utility model.

Fig. 4 is the utility model provides a motor support flexible connector's of exhaust fan of making an uproar structure chart falls in silence.

Fig. 5 is a top view of the motor bracket flexible connector of the noise reduction exhaust fan provided by the present invention.

Fig. 6 is a bottom view of the flexible connecting member of the motor bracket of the noise-reduction exhaust fan provided by the utility model.

Description of reference numerals:

the device comprises a volute 1, a bearing suspension 2, a rotating shaft 3, a suspension damping ring 4, a turbine 5, a motor fixing support 6, a motor support flexible connecting piece 7, a bearing 8, a motor rotor 9, a turbine flexible connecting piece 10, a shaft sleeve 11, a rivet pressing stud 12, an upper connecting piece 13, a lower connecting piece 14, a support structure 15, a shell flange 16, an upper volute 17, a lower volute 18, a fixing ring 19, a flexible connecting piece 20 and a buffer hole 21.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, which should not be considered limiting of the invention, but rather should be understood to be a more detailed description 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.

Fig. 2 of the present invention is a cross-sectional view taken along line a-a of fig. 1. Fig. 2 is a cross-sectional view of a mute and noise-reducing exhaust fan. In the embodiment shown in the figures, the exhaust fan comprises: the device comprises a volute 1, a bearing suspension 2, a rotating shaft 3, a suspension damping ring 4, a turbine 5, a motor fixing support 6 and a motor support flexible connecting piece 7. Wherein a bearing suspension 2, to which a bearing 8 is mounted, is fixed to the volute 1. One end of the rotating shaft 3 is fixed on a bearing 8 on the bearing suspension 2, the other end is fixed on the motor fixing bracket 6 through the bearing 8, and the rotating shaft 3 is used for installing the turbine 5 and driving the turbine 5 to rotate.

The suspension damping ring 4 is fixedly arranged between the bearing suspension 2 and the outer ring of the bearing 8, and the suspension damping ring 4 is used for damping and reducing the vibration transmission of the rotating shaft 3 during rotation. The suspension damping ring 4 is made of flexible material and has certain elasticity.

The motor fixing bracket 6 is fixedly arranged on the volute 1 through a motor bracket flexible connecting piece 7. The motor support flexible connecting piece 7 is made of flexible materials with certain elasticity, so that the vibration of the motor can be reduced and transmitted to the volute casing 1 through the motor fixing support 6, and the transmission of the vibration is further reduced.

The utility model discloses an among the concrete implementation, this exhaust fan still includes: motor rotor 9, turbine flexible connection 10 and shaft sleeve 11. Wherein the motor rotor 9 is fixed on the rotating shaft 3, and the motor rotor 9 acts on the rotation of the rotating shaft 3. Turbine flexible connection spare 10 is fixed on pivot 3, and turbine 5 is fixed on turbine flexible connection spare 10, and turbine flexible connection spare 10 is for having certain elastic flexible material for carry out shock attenuation and aligning to the rotation of turbine 5, when turbine 5 high-speed pivoted, turbine 5 can reach a dynamic balance, and the vibration amplitude can reduce gradually. In addition, the flexible turbine connecting piece 10 can reduce the transmission of vibration of the turbine 5 and reduce the vibration of the turbine 5 on the rotating shaft 3. The shaft sleeve 11 is fixed on the rotating shaft 3, and the shaft sleeve 11 is used for limiting the bearing 8 and preventing the bearing 8 from moving transversely in the operation process of the rotating shaft 3.

The utility model discloses an among the embodiment, motor fixed bolster 6 is the rigid support, and is fixed with a plurality of pressure riveting double-screw bolts 12 on the motor fixed bolster 6. The rigid support can strengthen the stability of motor fixing, prevents that the motor from taking place the skew in the in-process of operation, causing violent vibrations. In this embodiment, the rivet pressing stud 12 has a central hole, and the inner wall of the central hole has a thread. The press riveting stud 12 is pressed into a preset hole of the motor fixing support 6 through a press machine, the aperture of the preset hole is generally slightly smaller than the outer diameter of a cylinder of the press riveting stud, the periphery of the hole generates plastic deformation, the deformed part is extruded into a tool withdrawal groove of the press riveting stud 12, the press riveting stud 12 is tightly riveted on the motor fixing support 6, and therefore the stud with the internal thread is effectively fixed on the motor fixing support 6.

As shown in fig. 4, in the embodiment of the present invention, the motor support flexible connector 7 includes: an upper connector 13 and a lower connector 14. The upper connecting piece 13 and the lower connecting piece 14 are installed in a shaft hole matching mode, namely the upper connecting piece 13 and the lower connecting piece 14 are assembled and combined together in a shaft hole matching mode. During installation, the upper connecting piece 13 and the lower connecting piece 14 are respectively located at the inner side and the outer side of the volute casing 1, in this embodiment, the volute casing 1 is provided with a through hole at the position where the motor support flexible connecting piece 7 is installed, the upper connecting piece 13 is located at the outer side of the volute casing 1, the lower connecting piece 14 is located at the inner side of the volute casing 1, the matching position of the upper connecting piece 13 and the lower connecting piece 14 is located at the through hole position of the volute casing 1, and the diameter of the through hole is smaller than the maximum matching diameter, so that the motor support flexible connecting piece 7. In addition, as shown in fig. 5, the upper link 13 has a plurality of support structures 15 on the top, bottom and periphery thereof. As shown in fig. 6, the lower connecting member 14 has a plurality of support structures 15 on the top and around it. The support structure 15 serves to reduce the support area and reduce the transmission of vibrations. And the support structure 14 is integrally formed with the upper and

lower connectors

13 and 14. In addition, the support structure 15 may have a variety of shapes, with preferred shapes being trapezoidal, hemispherical, semi-ellipsoidal, etc.

As shown in fig. 3, the centers of the upper connecting piece 13 and the lower connecting piece 14 are respectively provided with a through hole for inserting the press-riveting stud 12, and the motor fixing bracket 6 and the motor bracket flexible connecting piece 7 are firmly fixed on the volute casing 1 through the matching of the bolt and the press-riveting stud 12. In this embodiment, the motor fixing bracket 6 contacts with the top of the upper connecting piece 13, the volute 1 contacts with the bottom of the upper connecting piece 3, the top of the lower connecting piece 14 contacts with the volute 1, the contact position is provided with the supporting structure 15, the supporting structure 15 can reduce the supporting contact area, and the transmission efficiency of vibration is greatly reduced. In addition, the periphery of the upper connecting piece 13 and the periphery of the lower connecting piece 14 are both contacted with the volute casing 1, a supporting structure 15 is arranged at the contact position, and the supporting structure 15 can reduce the supporting contact area and greatly reduce the transmission efficiency of vibration.

In the embodiment of the present invention, as shown in fig. 4 and 5, the upper connecting member 13 and the lower connecting member 14 have a plurality of buffer holes 21 therein, and the buffer holes 21 are used to reduce the transmission efficiency of the vibration and improve the elasticity of the upper connecting member 13 and the lower connecting member 14. When the exhaust fan is horizontally installed, the supporting structure 15 on the top of the upper connecting piece 13 is stressed and plays a role in shock absorption; when the exhaust fan is vertically installed, the upper connecting member 13 and the lower connecting member 14 are subjected to a force perpendicular to the center line from the rivet pressing stud 12, and at this time, the buffer hole 21 can play a role in shock absorption and greatly reduce the transmission efficiency of shock.

The exhaust fan further comprises a housing flange 16 provided on the scroll casing 1 for enhancing the structural strength of the scroll casing 1. In the preferred embodiment, the material of the volute 1 is plastic, so that the weight of the exhaust fan can be greatly reduced. The casing flanges 16 made of rigid materials are arranged on the upper surface and the lower surface of the volute casing 1, so that the structural strength of the volute casing 1 can be greatly enhanced while the light weight is ensured. In addition, the motor fixing bracket 6 is also mounted on the housing flange 16, which can ensure stability of the mounting position.

In a specific embodiment of the present embodiment, the volute casing 1 includes an upper volute casing 17 and a lower volute casing 18, and the connection between the upper volute casing 17 and the lower volute casing 18 is fixed by interference fit. The upper volute 17 is arranged on the outer side of the lower volute 18 at the joint of the upper volute 17 and the lower volute 18, and the joint is in interference fit. In another embodiment, the upper volute 17 is connected to the lower volute 18, and the upper volute 17 is disposed inside the lower volute 18, and the connection is in interference fit. The cross section of the connecting surface of the upper volute 17 and the lower volute 18 is wavy, and the wavy surface is used for flow guiding and structure enhancement. The outermost side of the volute 1 in the flowing direction of the airflow, namely the circumferential surface of the volute 1 parallel to the motor rotating shaft 4, is a wavy surface, and the wavy surface can guide the airflow when the airflow flows, so that the airflow is prevented from being disordered when the airflow flows, and the noise of the airflow can be reduced. In addition, the wavy surface can enhance the structural strength, so that the bearing capacity of the side surface of the volute 1 is enhanced. The wavy surface is more stable in connection with the upper volute 17 and the lower volute 18 which are in interference fit, and the situation that the connection part of the upper volute 17 and the lower volute 18 is separated can be reduced.

In the embodiment of the present invention, as shown in fig. 1, the scroll casing 1 has a plurality of fixing rings 19, and the fixing rings 19 are used for fixing the scroll casing 1. Wherein, be provided with flexible connection 20 on the solid fixed ring 19, flexible connection 20 has certain elasticity for reduce vibrations and pass through the efficiency that solid fixed ring 19 transmitted away, further reduce the noise that vibrations brought.

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. A mute noise-reducing exhaust fan is characterized by comprising: a volute (1), a bearing suspension (2), a rotating shaft (3), a suspension damping ring (4), a turbine (5), a motor fixing bracket (6) and a motor bracket flexible connecting piece (7), wherein,

the bearing suspension (2) provided with a bearing (8) is fixed on the volute (1);

one end of the rotating shaft (3) is fixed on the bearing (8) on the bearing suspension (2), the other end of the rotating shaft is fixed on the motor fixing bracket (6) through the bearing (8), and the rotating shaft (3) is used for mounting the turbine (5);

the suspension damping ring (4) is fixedly arranged between the bearing suspension (2) and the outer ring of the bearing (8) and is used for damping; and

the motor fixing support (6) is fixedly arranged on the volute (1) through the motor support flexible connecting piece (7).

2. A quieter fan according to claim 1, further comprising: a motor rotor (9), a turbine flexible connecting piece (10) and a shaft sleeve (11), wherein,

the motor rotor (9) is fixed on the rotating shaft (3) and used for rotating the rotating shaft (3);

the turbine flexible connecting piece (10) is fixed on the rotating shaft (3), the turbine (5) is fixed on the turbine flexible connecting piece (10), and the turbine flexible connecting piece (10) is used for damping and aligning the rotation of the turbine (5); and

the shaft sleeve (11) is fixed on the rotating shaft (3) and used for limiting the bearing (8).

3. The silence noise-reducing exhaust fan according to claim 1, wherein the motor fixing bracket (6) is a rigid bracket, and a plurality of rivet pressing studs (12) are fixed on the motor fixing bracket (6).

4. A silent noise reduction exhaust fan according to claim 3, wherein said motor bracket flexible connector (7) comprises: the volute comprises an upper connecting piece (13) and a lower connecting piece (14), wherein the upper connecting piece (13) and the lower connecting piece (14) are installed in a matched mode through shaft holes, and the upper connecting piece (13) and the lower connecting piece (14) are respectively located on the inner side and the outer side of the volute (1);

the top, the bottom and the periphery of the upper connecting piece (13) are provided with a plurality of supporting structures (15), the top and the periphery of the lower connecting piece (14) are provided with a plurality of supporting structures (15), and the supporting structures (15) are used for reducing the supporting area and reducing the vibration transmission.

5. The silence noise reduction exhaust fan according to claim 4, characterized in that the centers of the upper connector (13) and the lower connector (14) are provided with through holes for inserting the rivet pressing studs (12), and the motor fixing bracket (6) is fixed on the volute (1) through the matching of bolts and the rivet pressing studs (12).

6. A mute and noise-reducing exhaust fan according to claim 4, wherein the upper connector (13) and the lower connector (14) have a plurality of buffer holes (21) therein for reducing the transmission efficiency of the vibration.

7. The squelch and denoise exhaust fan according to claim 1, characterized in that it further comprises a casing flange (16) arranged on the volute (1) for reinforcing the structural strength of the volute (1).

8. The silence and noise reduction exhaust fan according to claim 1, wherein the volute (1) comprises an upper volute (17) and a lower volute (18), and the connection between the upper volute (17) and the lower volute (18) is fixedly connected in an interference fit manner.

9. The silence de-noising exhaust fan according to claim 8, characterised in that the cross section of the connection surface of the upper volute (17) and the lower volute (18) is wave-shaped for flow guiding and structural reinforcement.

10. The silence noise reduction exhaust fan according to claim 1, characterized in that the volute casing (1) is provided with a plurality of fixing rings (19) for fixing the volute casing (1), wherein the fixing rings (19) are provided with flexible connectors (20), and the flexible connectors (20) are used for reducing the efficiency of the vibration transmitted out through the fixing rings (19).