CN211715354U

CN211715354U - Mute type turbofan

Info

Publication number: CN211715354U
Application number: CN202020130948.XU
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: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-10-20
Anticipated expiration: 2030-01-20

Abstract

The utility model provides a hush air turbofan, this turbofan includes: the device comprises a volute, a motor fixing frame, a motor damping seat, a motor rotating shaft, a turbine, a bearing and a bearing damping ring. The motor shock absorption seat is fixed on the volute and used for fixedly mounting a motor rotating shaft. The motor fixing frame is fixedly arranged on the volute, corresponds to the motor shock absorption seat and is used for fixedly arranging the motor rotating shaft. The bearing is all installed at the both ends of motor shaft, and wherein the bearing of one end is installed on the bearing damping ring, and the bearing damping ring is installed on the motor mount, and the bearing of one end is installed on the motor shock mount in addition. The turbine is fixedly arranged on the motor rotating shaft and used for rotating and guiding wind along with the rotation of the motor rotating shaft. The motor rotating shaft of the turbofan is flexibly connected with the volute, so that the transmission of motor vibration is weakened, and vibration noise is reduced. Meanwhile, the turbofan enables gas to flow more stably through the change of the shape and the structure of the volute, and reduces noise generated when the gas flows.

Description

Mute type turbofan

Technical Field

The utility model relates to a fan technical field especially relates to the silence fan, specifically is a silence type turbofan.

Background

The fan has wide application and is in an indispensable position in modern social production. According to different use requirements and use scenes, the rotating speed and the size of the fan are greatly different, but vibration and noise are brought by high rotating speed. And the vibration can bring certain destruction to equipment, and the noise can influence the environmental quality of people's production, life. Effectively reduce the running noise of fan, will help improving the noise environment in our production and life.

The existing fan on the market carries out the damping through the precision that promotes the pivot, but damping effect has very big promotion like this, but the cost is too high, and hardly carries out further damping. When the 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. In addition, still can carry out the isolated of noise through setting up the sponge of making an uproar, the sponge of making an uproar though played certain noise reduction effect, but be unfavorable for the heat dissipation of fan, have very big potential safety hazard.

The utility model is directed to the above problem, reform transform the fixed knot structure and the wind-guiding structure of fan, make the vibration of fan reduce, 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 a hush air turbine fan. The motor structure of the turbofan is flexibly connected with the volute, so that the transmission of motor vibration is weakened, and vibration noise is reduced. Meanwhile, the turbofan enables gas to flow more stably through the change of the shape and the structure of the volute, and reduces noise generated when the gas flows.

The utility model provides a hush air turbofan, this turbofan includes: the device comprises a volute, a motor fixing frame, a motor shock absorption seat, a motor rotating shaft, a turbine, a bearing and a bearing shock absorption ring, wherein the motor shock absorption seat is fixed on the volute and used for fixedly mounting the motor rotating shaft; the motor fixing frame is fixedly arranged on the volute, corresponds to the motor shock absorption seat and is used for fixedly arranging the motor rotating shaft; the bearings are mounted at two ends of the motor rotating shaft, the bearing at one end is mounted on the bearing damping ring, the bearing damping ring is mounted on the motor fixing frame, and the bearing at the other end is mounted on the motor damping seat; and the turbine is fixedly arranged on the motor rotating shaft and used for rotating and guiding wind along with the rotation of the motor rotating shaft.

The utility model discloses an among the concrete implementation, the air outlet department of spiral case still is provided with the air outlet amortization cover for fall and make an uproar.

The inner wall of the air outlet silencing cover is provided with a flow guide cone, the cross section of the flow guide cone is gradually enlarged at the position close to the air outlet of the air outlet silencing cover, and the flow guide cone is used for air flow pressurization and air flow noise reduction.

In a particular embodiment of the present invention, the motor shaft and the junction of the turbine are provided with a flexible connecting ring for damping.

The shaft gasket and the shaft snap spring are used for preventing the flexible connecting ring from generating axial displacement in the rotating process of the motor rotating shaft.

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.

In a particular embodiment, the turbine has on the blade the guide cone for carry out the air current pressure boost and the air current falls makes an uproar.

In the specific implementation manner of the utility model, two sides of the motor shock absorption seat are respectively provided with a flange, and the flanges are fixed together through bolts to enhance the structural strength of the motor shock absorption seat and prevent the motor shock absorption seat from deforming; and the motor shock absorption seat is also provided with a fixing flange for fixing the motor shock absorption seat on the volute through bolts.

The utility model discloses an among the concrete implementation, a plurality of solid fixed rings have on the spiral case, gu be provided with flexible connectors on the fixed ring for carry out fixed connection with flexible connectors and peripheral hardware fixed station through the bolt.

According to the above embodiments, the utility model provides a hush air turbofan has following benefits: this turbofan is for current fan, and the aspect of making an uproar is more reasonable in the aspect of making an uproar, through using flexible connectors, carries out flexonics between rotating member such as motor rotor and the casing, reduces the transmission efficiency of vibration, and then noise reduction. In addition, the structure of a ventilating pipeline inside the volute is changed, and the diversion cone is arranged, so that airflow is combed to a certain degree, the airflow flowing is stable, and the purpose of noise reduction is achieved. In addition, the flow guide cone also has the function of pressurization, so that the pressure of the air inlet is increased, and the discharge of air flow is promoted.

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 external view of a mute type turbofan provided by the present invention.

Fig. 2 is a cross-sectional view of a mute type turbofan provided by the present invention.

Fig. 3 is a cross-sectional view of a first volute outlet of a mute type turbofan according to the present invention.

Fig. 4 is a cross-sectional view of a second volute outlet embodiment of the mute type turbo fan provided by the present invention.

Fig. 5 is a cross-sectional view of an air outlet muffling cover of a mute type turbofan provided by the present invention.

Fig. 6 is an outlet structure view of the air outlet muffling cover of the silent turbofan according to the present invention.

Fig. 7 is a structural diagram of a turbine of a mute type turbofan according to the present invention.

Fig. 8 is a cross-sectional view of a turbine of a mute type turbofan according to the present invention.

Fig. 9 is a partial structural sectional view of a first turbine blade of a mute type turbofan according to the present invention.

Fig. 10 is a partial structural sectional view of a second turbine blade embodiment of a silent turbine fan according to the present invention.

Fig. 11 is a partial view of a flow guiding cone on a turbine blade of a mute type turbo fan provided by the present invention.

Description of reference numerals:

1-volute, 2-motor fixing frame, 3-motor damping seat, 4-motor rotating shaft 5-turbine, 6-bearing, 7-bearing damping ring, 8-air outlet silencing cover, 9-guide cone, 10-flexible connecting ring, 11-shaft gasket, 12-shaft snap spring, 13-upper volute, 14-lower volute, 15-flange, 16-fixing flange, 17-fixing ring, 18-flexible connecting piece, 19-limiting sealing cover and 20-reinforcing rib.

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. 1 shows a cross-sectional view of a mute type turbofan according to the present invention. In the embodiment shown in fig. 1, the turbofan comprises: the device comprises a volute 1, a motor fixing frame 2, a motor damping seat 3, a motor rotating shaft 4, a turbine 5, a bearing 6 and a bearing damping ring 7. Wherein, the motor damper base 3 is fixed on the volute 1 and used for fixedly mounting the motor rotating shaft 4. The motor fixing frame 2 is fixedly arranged on the volute 1, corresponds to the motor shock absorption seat 3 and is used for fixedly arranging the motor rotating shaft 4. Two sides of the volute 1 are provided with two openings, and the motor fixing frame 2 and the motor damping seat 3 are respectively and fixedly arranged at one opening and are corresponding to each other.

Bearings 6 are installed at two ends of the motor rotating shaft 4, the bearing 6 at one end is installed on a bearing damping ring 7, the bearing damping ring 7 is installed on the motor fixing frame 2, and the bearing 6 at the other end is installed on the motor damping seat 3. The motor fixing frame 2 and the motor damper base 3 are respectively fixed on the volute 1, so that the motor rotating shaft 4 is also fixed inside the volute 1. Then, the turbine 5 is fixedly installed on the motor rotating shaft 4, and the turbine 5 rotates along with the motor rotating shaft 4 to guide wind. The motor damping seat 3 and the bearing damping ring 7 are both made of flexible materials and have certain elasticity, so that the vibration generated by the motor rotating shaft 4 in the rotating process can be reduced and transmitted to the volute 1, and the purposes of damping and reducing noise are achieved.

As shown in fig. 1, in the specific embodiment of the present invention, the air outlet of the spiral case 1 is further provided with an air outlet noise reduction cover 8, and the air outlet noise reduction cover 8 is used for reducing noise. As shown in fig. 5, the inner wall of the outlet muffling cover 8 is provided with a diversion cone 9, and preferably, as shown in fig. 6, a circle of diversion cones 9 is arranged on the inner wall of the outlet muffling cover 8. In addition, the cross section of the diversion cone 9 is gradually enlarged at the air outlet close to the air outlet silencing cover 8, but the height of the diversion cone 9 is not changed, and the preferred height of the diversion cone 9 is 5 mm-20 mm. The guide cone 9 is mainly used for air flow pressurization and air flow noise reduction. The cross section area of the diversion cone 9 close to the outlet is increased, so that the air flow pressure at the outlet is increased, and the air flow is conveniently discharged outwards. Meanwhile, the cross section area of the diversion cone 9 which is contacted with the airflow firstly is the smallest, and then the cross section of the diversion cone 9 is gradually enlarged, so that the functions of breaking the air and combing the organized airflow are achieved, the flowing of the airflow is more stable, and the flowing noise of the airflow is further reduced.

In the specific embodiment of the utility model, the junction of motor shaft 4 and turbine 5 is provided with flexible go-between 10, and flexible go-between 10 is used for carrying out the shock attenuation. The turbine 5 can shake in the rotating process or shake due to design and installation errors, the flexible connecting ring 10 is arranged at the connecting position of the motor rotating shaft 4 and the turbine 5, so that the assembly gap between the motor rotating shaft 4 and the turbine 5 can be eliminated, the shake caused by the assembly gap is reduced, and the transmission of the shake can be greatly reduced. In addition, when the turbine 5 rotates, the turbine 5 will self-center by the elasticity of the flexible connecting ring 10, so that the rotation tends to be stable, and the vibration amplitude is reduced. In addition, in order to improve the stability of the turbine 5 during operation, one side of the flexible connecting ring 10 is provided with a shaft gasket 11, the other side of the flexible connecting ring is provided with a shaft snap spring 12, and the shaft gasket 11 and the shaft snap spring 12 are used for preventing the flexible connecting ring 10 from generating axial displacement in the rotating process of the motor rotating shaft 4, so that the rotating stability is improved.

The utility model discloses an among the concrete implementation, spiral case 1 includes spiral case 13 and lower spiral case 14, goes up spiral case 13 and carries out fixed connection through interference fit's mode with being connected of lower spiral case 14. In fig. 2, the connection between the upper volute 13 and the lower volute 14, the upper volute 13 is disposed outside the lower volute 14, and the connection is in interference fit. In another embodiment, the connection between the upper volute 13 and the lower volute 14 is formed by an interference fit, and the upper volute 13 is disposed inside the lower volute 14. The cross section of the connecting surface of the upper volute 13 and the lower volute 14 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 casing 13 and the lower volute casing 14 which are in interference fit, and the situation that the connection part of the upper volute casing 13 and the lower volute casing 14 is separated can be reduced.

Further, as shown in fig. 3, a cross-sectional view taken along a-a in fig. 1 is shown. In the figure, the upper and lower surfaces of the air outlet of the volute 1 are wavy surfaces, and the two sides are planes. As shown in fig. 4, in another embodiment of the outlet, in this embodiment, a diversion cone 9 is provided on an inner wall at the outlet of the volute 1, and the diversion cone 9 can again divert the airflow at the outlet, further reducing the noise of the airflow and increasing the pressure of the airflow, so as to facilitate the airflow flowing out of the volute 1. The shape of the connection part of the air outlet silencing cover 8 and the air outlet of the volute casing 1 is the same, the air outlet silencing cover 8 is convenient to be butted with the volute casing 1, the cross section of the air outlet silencing cover 8 is changed into a circular shape along the direction of the air flow, the flow guide cone 9 is arranged at the outlet, the air flow is dredged, noise is reduced, the pressure is increased, the flow speed of the air flow is improved, and the air flow is convenient to discharge.

In the embodiment of the present invention, fig. 7 is a structural view of the turbine 5, and fig. 8 is a sectional view of the turbine 5 at positions B to B in fig. 7. In the figure, the blades of the turbine 5 are distributed in a circle, and the motor shaft 4 passes through a middle shaft hole of the turbine 5 and is flexibly connected with the turbine 5 through a flexible connecting ring 10. Fig. 9 is a cross-sectional view of a blade on a turbine 5, where the section line is the blade, the inward vortex of the blade is a guide cone 9, the guide cone 9 extends from the root of the blade upwards along the radial direction of the turbine and is close to the blade, and the guide cone 9 extends from the bottom of the blade to the top of the blade and is flush with the blade. In the figure, the cross section of the bottom of the guide cone 9 is larger than that of the top of the guide cone 9. In addition, the preferable integration of the guide cone 9 and the blade can enhance the stability of the structure, and the strength of the blade is enhanced, thereby playing the role of a reinforcing rib. Most importantly, the guide cones 9 on the blades can comb the airflow, and the noise of the airflow is reduced. Fig. 10 shows a structure diagram of a second embodiment of a guide cone 9 on a blade. In the figure, the cross-sectional area of the bottom of the guide cone 9, i.e. the connection of the guide cone 9 with the turbine casing, is smaller than the cross-sectional area of the top of the guide cone 9. The guide cone 9 extends from the bottom of the blade and may extend to the top of the blade, flush with the blade.

As shown in fig. 11, in the embodiment of the present invention, the cross section of one end of the guiding cone 9 is smaller than the cross section of the other end. That is, the cross-sectional area of the guide cone 9 is gradually increased from one end to the other end. And the diversion cone 9 is designed as a triangular cone, so that the air flow can be effectively broken. The guide cone 9 arranged on the blades of the turbine 5 can ensure that when air flows through the inner sides of the blades of the turbine 5, the air flow is extruded by the guide cone structure which is gradually increased, so that the air flow pressure is gradually increased and centrifugally discharged. That is, the air flow enters from one end with a small cross section, and the pressure of the air flow is gradually increased when the air flow reaches the other end. The utility model discloses well preferred water conservancy diversion awl 9 highly be 5mm ~ 20mm, and concrete high position and use scene decision according to the use.

The utility model discloses an among the concrete embodiment, motor damper seat 3's both sides are provided with flange 15 respectively, are in the same place flange 15 is fixed through the bolt for strengthen motor damper seat 3's structural strength, prevent that motor damper seat 3 from warping. Motor damper 3 is flexible support, and in order to prevent that motor damper 3 from taking place local deformation because of the atress in the use, set up flange 15 respectively in motor damper 3's both sides, then through the bolt with the 15 fixed connection of flanges of both sides together, through the mode in limited space, prevent that motor damper 3 from carrying out atress deformation. In addition, the motor damper base 3 is further provided with a fixing flange 16, and the fixing flange 16 is used for fixing the motor damper base 3 on the volute casing 1 through bolts, so that the motor rotating shaft 4 is supported. As shown in fig. 2, the motor damper base 3 is located on the inner ring side of the fixing flange 16, and the section of the motor damper base 3 is S-shaped and circumferentially distributed on the motor damper base 3. The S-shaped motor shock absorption seat 3 can enable the motor rotating shaft 4 to realize floating connection, and further reduce the vibration transmission of the motor rotating shaft 4. The outer side of the motor shock absorption seat 3 is further provided with a limiting sealing cover 19, and the limiting sealing cover 19 is fixed on the volute 1 and used for limiting and fixing the motor shock absorption seat 3. Have a plurality of inner groovies on the spacing fixing base 19, this inner groovy is corresponding with the S profile of motor damper seat 3, and applys thrust to the S profile, prevents that motor damper seat 3 from leading to motor shaft 4 can not stable rotation because of taking place too big displacement in the use. In addition, the sealing device can also play a certain sealing role.

The utility model discloses an among the concrete embodiment, have a plurality of solid fixed rings 17 on the spiral case 1, gu fixed ring 17 evenly distributed is on spiral case 1's circumference, and is provided with flexible connectors 18 on the solid fixed ring 17, the bolt passes flexible connectors 18 and carries out fixed connection with the peripheral hardware fixed station, realizes the flexible fixed connection of spiral case 1 and peripheral hardware fixed station, reduces spiral case 1's vibrations transmission, the production of noise abatement.

The utility model discloses an among the embodiment, be provided with many strengthening ribs 20 outside the casing of spiral case 1, further strengthen spiral case 1's casing intensity.

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 kind of hush air turbine fan, characterized by, this turbine fan includes: a volute (1), a motor fixing frame (2), a motor damping seat (3), a motor rotating shaft (4), a turbine (5), a bearing (6) and a bearing damping ring (7), wherein,

the motor shock absorption seat (3) is fixed on the volute (1) and is used for fixedly mounting the motor rotating shaft (4);

the motor fixing frame (2) is fixedly arranged on the volute (1), corresponds to the motor shock absorption seat (3) and is used for fixedly arranging the motor rotating shaft (4);

the bearings (6) are mounted at two ends of the motor rotating shaft (4), the bearing (6) at one end is mounted on the bearing damping ring (7), the bearing damping ring (7) is mounted on the motor fixing frame (2), and the bearing (6) at the other end is mounted on the motor damping seat (3); and

the turbine (5) is fixedly installed on the motor rotating shaft (4) and used for rotating and guiding wind along with the rotation of the motor rotating shaft (4).

2. The silent turbofan according to claim 1, wherein an air outlet muffling enclosure (8) is further provided at the air outlet of the volute (1) for noise reduction.

3. The squelch type turbofan according to claim 2, wherein the inner wall of the outlet muffling cover (8) is provided with a diversion cone (9), the cross section of the diversion cone (9) is gradually enlarged near the outlet of the outlet muffling cover (8), and the diversion cone (9) is used for air flow pressurization and air flow noise reduction.

4. Silent turbofan according to claim 1 or 2 or 3, characterized in that a flexible connection ring (10) is provided at the connection of the motor shaft (4) and the turbine (5) for damping.

5. The squelch type turbofan according to claim 4, wherein the flexible connecting ring (10) is provided with a shaft washer (11) on one side and a shaft snap spring (12) on the other side, and the shaft washer (11) and the shaft snap spring (12) are used for preventing the flexible connecting ring (10) from axial displacement during the rotation of the motor rotating shaft (4).

6. The silent turbofan according to claim 1, wherein the volute (1) comprises an upper volute (13) and a lower volute (14), and the connection of the upper volute (13) and the lower volute (14) is fixedly connected by interference fit.

7. The silent turbofan according to claim 6, characterized in that the cross section of the joint surface of the upper volute (13) and the lower volute (14) is wave-shaped for flow guiding and structural reinforcement.

8. The silent turbofan according to claim 3, characterized in that the blades of the turbine (5) have said guide cone (9) for air flow pressurization and air flow noise reduction.

9. The squelch type turbofan according to claim 1, wherein flanges (15) are respectively provided on both sides of the motor damper base (3), and the flanges (15) are fixed together by bolts for enhancing the structural strength of the motor damper base (3) and preventing the motor damper base (3) from being deformed; and

the motor damping seat (3) is further provided with a fixing flange (16) used for fixing the motor damping seat (3) on the volute (1) through bolts.

10. The silent turbofan according to claim 1, wherein the volute (1) has a plurality of fixed rings (17), and the fixed rings (17) are provided with flexible connectors (18) for fixedly connecting the flexible connectors (18) with an external fixed station by bolts.