CN218760492U - Noise reduction type centrifugal fan - Google Patents
Noise reduction type centrifugal fan Download PDFInfo
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- CN218760492U CN218760492U CN202221349206.1U CN202221349206U CN218760492U CN 218760492 U CN218760492 U CN 218760492U CN 202221349206 U CN202221349206 U CN 202221349206U CN 218760492 U CN218760492 U CN 218760492U
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Abstract
The application discloses type of making an uproar centrifugal fan falls belongs to centrifugal fan's technical field, and its technical scheme main points are including: the volute comprises an air inlet and an air outlet; the motor is arranged on the end face of the volute and is far away from one side of the air inlet, and the motor is provided with a base; the impeller is arranged in the volute and is connected with the motor in an installing way, and the impeller comprises a front cover plate, a rear cover plate and blades; the air collecting ring is arranged on the air inlet, and the volute is installed and connected; the flow guide structure is arranged on the inner wall surface of the air flow collecting ring and comprises a plurality of bulges which are uniformly distributed around the axis of the air flow collecting ring; and the reinforcing structure is arranged on the volute. The application provides a centrifugal fan improves the water conservancy diversion effect of air inlet department, reduces the random flow phenomenon, reduces air current energy loss simultaneously, improves fan efficiency, reduces the production of noise.
Description
Technical Field
The application belongs to the technical field of centrifugal fans, and particularly relates to a noise reduction type centrifugal fan.
Background
The centrifugal fan is a ventilating and exhausting device widely applied to factories, tunnels, cooling towers and buildings, and the centrifugal fan can improve the gas pressure and discharge gas through the input of mechanical energy of devices such as a motor and the like. Due to its high ventilation efficiency, it is widely used.
The prior Chinese patent with publication number CN214887792U discloses a novel general centrifugal fan, which comprises a volute, a motor and an impeller, wherein the end face of the volute is provided with an air inlet, the side face of the volute is provided with an air outlet, the motor is arranged on the end face of the volute, which is far away from the air inlet, the output shaft of the motor is connected with the impeller, a plurality of blades which are spirally distributed along the axis of the impeller are arranged in the impeller, the blades are arc-shaped plates, the front edge end and the tail edge end of each blade are folded and pressed towards the concave surface of each blade to form a reinforcing part, the reinforcing parts are attached to the blades, a plurality of groove ribs are arranged on the concave surfaces of the blades, and the groove ribs are arranged along the direction from the front edge end to the tail edge end.
The centrifugal fan improves the compression strength of the blades, but the air inlet is conical and is not provided with a flow guide device, when airflow enters the air inlet, vortex can be formed, the generated airflow turbulence and the fan generate a large amount of impact, and larger noise is generated.
SUMMERY OF THE UTILITY MODEL
The purpose of this application is to the technical problem that above-mentioned exists, provides a centrifugal fan, improves the water conservancy diversion effect of air inlet department, reduces the random flow phenomenon, reduces air current energy loss simultaneously, improves fan efficiency, the production of noise reduction.
The application provides a type of making an uproar centrifugal fan falls includes: the volute comprises an air inlet and an air outlet; the motor is arranged on the end face of the volute and is far away from one side of the air inlet, and the motor is provided with a base; the impeller is arranged in the volute and is connected with the motor in an installing way, and the impeller comprises a front cover plate, a rear cover plate and blades; the air collecting ring is arranged on the air inlet, and the volute is installed and connected; the flow guide structure is arranged on the inner wall surface of the air flow collecting ring and comprises a plurality of bulges which are uniformly distributed around the axis of the air flow collecting ring; and the reinforcing structure is arranged on the volute.
The volute is formed by splicing metal plates, the motor is installed on the base, the volute is installed and connected with the base, the impeller is driven to rotate by the motor, air enters the volute from the air inlet and then is blown out from the air outlet, the blades are connected with the front cover plate and the rear cover plate in a welded mode or integrally connected through a pouring process, the impeller is enabled to have high structural strength, a plurality of bulges are uniformly distributed around the axis of the air collecting ring to form a flow guide structure, the air passing through the air collecting ring is subjected to a flow guide effect, the turbulence phenomenon of the air at the air inlet is reduced, the loss of air flow efficiency is reduced, the efficiency of the fan is improved, meanwhile, the noise is reduced, the efficient noise reduction effect is achieved, the stability of the motor during output is further improved through the reinforcing structure, the reinforcing structure is connected with the volute through bolts, the bulges are connected with the air collecting ring in a welded mode or integrally connected through a casting process or formed through a cutting process.
Furthermore, the air collecting ring is conical, the small end of the air collecting ring faces one side in the volute, the bulge extends from the large end of the air collecting ring to one side of the small end of the air collecting ring, the axis of the bulge is arc-shaped, and the cross section of the bulge is gradually reduced.
The air collecting ring is conical, the small end of the air collecting ring faces one side in the volute, the circulation speed of air at the air inlet is accelerated, when the air flows at the air inlet, a vortex shape can be formed, the protruding axis is arc-shaped, the air orderliness is improved, meanwhile, the kinetic energy loss caused by flow guiding is reduced, and the efficiency of the fan is improved.
Furthermore, the protrusion comprises an outer side wall and an inner side wall, the cross sections of the outer side wall and the inner side wall are both arc-shaped, and the distance between the outer side wall and the inner side wall is the largest at one end contacted with the air collecting ring.
The cross sections of the outer side wall and the inner side wall are arc-shaped, the efficiency of the fan is improved, airflow impact is reduced, noise is reduced, air flows more smoothly, the connecting part of the outer side wall and the inner side wall with the inner wall surface of the air collecting ring is in smooth transition, the distance between the outer side wall and the inner side wall is the largest, and the connecting strength between the protrusion and the air collecting ring is improved.
Furthermore, the reinforcing structure is arranged on the outer wall surface of the volute and connected with the motor output shaft through a bearing.
The middle of the reinforcing structure is provided with a bearing seat for mounting a bearing, the bearing is mounted in the bearing seat, stable rotation of the motor output shaft is guaranteed, the reinforcing structure is in a cross shape, the two ends of the reinforcing structure are provided with connecting parts connected with the volute, and the reinforcing structure and the volute are more stable to mount.
Furthermore, the impeller is provided with a shaft disc, the shaft disc is connected with an output shaft of the motor, the shaft disc is connected with the rear cover plate, and the shaft disc is provided with a flow guide end which is in a conical shape.
The reel is connected with the output shaft of motor, through the output shaft erection joint of reel with impeller and motor, improve mounting structure's steadiness, be connected through bolt and nut between reel and the back shroud, the end of diverting is the taper and the lateral wall has certain radian, when the air current striking that gets into in the spiral case from the air intake on the reel, through the end of diverting make the air current to roll off all around, reduce the impact of air current to reel and back shroud, improve the stability of impeller.
Furthermore, the volute is provided with a sleeve, the sleeve is sleeved outside the air collecting ring, a reinforcing plate is arranged between the sleeve and the air collecting ring, the reinforcing plate is conical, and the axis of the reinforcing plate is the same as that of the air collecting ring.
The sleeve is arranged outside the air flow collecting ring, the connection stability between the air flow collecting ring and the volute is improved through the sleeve, the reinforcing plate is welded between the sleeve and the air flow collecting ring and is in a conical shape, one end of a small circle of the reinforcing plate is close to one end of a small circle of the air flow collecting ring or is far away from the small circle of the air flow collecting ring, and the structural strength between the sleeve and the air flow collecting ring is improved through the reinforcing plate.
The beneficial effect of this application is:
1. the plurality of bulges are uniformly distributed around the axis of the air collecting ring to form a flow guide structure, so that the air passing through the air collecting ring is guided, the turbulent flow phenomenon of the air at the air inlet is reduced, the air flow efficiency loss is reduced, the fan efficiency is improved, the noise is reduced, and the efficient noise reduction effect is realized.
2. Stability when further increasing motor output through additional strengthening, additional strengthening's centre is provided with the bearing frame that is used for installing the bearing, and the bearing is installed in the bearing frame, guarantees motor output shaft's steady rotation.
3. Arrange the sleeve in outside the air mass flow circle, improve the connection steadiness between air mass flow circle and the spiral case through the sleeve, improve the structural strength between sleeve and the air mass flow circle through the reinforcing plate.
Drawings
Fig. 1 is a schematic structural view of a centrifugal fan of the present application;
FIG. 2 is a front view schematic of the air collector ring of the present application;
FIG. 3 is a schematic view of the structure of the bumps of the present application;
FIG. 4 is a rear view of the reinforcement structure of the present application;
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived from the embodiments in the present application by a person skilled in the art, are within the scope of protection of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The portable server provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings by specific embodiments and application scenarios thereof.
Example 1:
as shown in fig. 1, an embodiment of the present application provides a noise reduction type centrifugal fan, including: a volute 100 comprising an air inlet 101 and an air outlet 102; the motor 200 is arranged on the end face of the volute 100 and far away from one side of the air inlet 101, and the motor 200 is provided with a base 210; the impeller 300 is arranged in the volute 100 and is connected with the motor 200 in an installing manner, and the impeller 300 comprises a front cover plate 310, a rear cover plate 320 and blades 330; the air collecting ring 400 is arranged on the air inlet 101, and the volute 100 is installed and connected; the flow guide structure 500 is arranged on the inner wall surface of the air collecting ring 400, the flow guide structure 500 comprises a plurality of bulges 510, and the bulges 510 are uniformly distributed around the axis of the air collecting ring 400; a reinforcing structure 600 is disposed on the scroll casing 100.
The volute 100 is formed by splicing metal plates, the motor 200 is mounted on the base 210, the volute 100 is mounted and connected with the base 210, the impeller 300 is driven to rotate by the motor 200, air enters the volute 100 from the air inlet 101 and then is blown out from the air outlet 102, the blades 330 are connected with the front cover plate 310 and the rear cover plate 320 in a welding mode or integrally connected through a pouring process, the impeller 300 has high structural strength, the plurality of bulges 510 are uniformly distributed around the axis of the air collecting ring 400 to form a flow guide structure 500, the air passing through the air collecting ring 400 is guided, the turbulent flow phenomenon of the air at the air inlet 101 is reduced, the air flow energy efficiency loss is reduced, the fan efficiency is improved, meanwhile, the noise is reduced, the efficient noise reduction effect is achieved, the stability of the motor 200 during output is further improved through the reinforcing structure 600, the reinforcing structure 600 is mounted and connected with the volute 100 through bolts, the bulges 510 are connected with the air collecting ring 400 in a welding mode or integrally connected through a casting process or formed through a cutting process.
Example 2:
as shown in fig. 2 and 3, in addition to the above technical features, in the present embodiment, the air collecting ring 400 is tapered, and a small end of the air collecting ring faces to an inner side of the volute 100, and the protrusion 510 extends from a large end of the air collecting ring 400 to the small end of the air collecting ring, and has an arc-shaped axis and a gradually decreasing cross section.
Further, the protrusion 510 includes an outer sidewall 511 and an inner sidewall 512, the outer sidewall 511 and the inner sidewall 512 are arc-shaped in cross section, and the distance between the outer sidewall 511 and the inner sidewall 512 is the largest at the end contacting the air collecting ring 400.
The air collecting ring 400 is conical, and the small end of the air collecting ring faces to one side in the volute 100, so that the circulation speed of air at the air inlet 101 is increased, the air can form a vortex shape when flowing at the air inlet 101, the axial line of the protrusion 510 is arc-shaped, the air order is improved, the kinetic energy loss caused by flow guiding is reduced, and the efficiency of the fan is improved.
The cross sections of the outer side wall 511 and the inner side wall 512 are arc-shaped, so that the efficiency of the fan is improved, the airflow impact is reduced, the noise is reduced, the air flow is smoother, the joint of the outer side wall 511 and the inner side wall 512 with the inner wall surface of the air collecting ring 400 is in smooth transition, the distance between the outer side wall 511 and the inner side wall is the largest, and the connection strength between the protrusion 510 and the air collecting ring 400 is improved.
Example 3:
as shown in fig. 1 and 4, in addition to the above technical features, the embodiment of the present application provides a noise reduction type centrifugal fan, and further, the reinforcing structure 600 is disposed on an outer wall surface of the volute 100, and the reinforcing structure 600 is connected to an output shaft of the motor 200 through a bearing.
The middle of additional strengthening 600 is provided with the bearing frame that is used for installing the bearing, and the bearing is installed in the bearing frame, guarantees the stable rotation of motor 200 output shaft, and additional strengthening 600 is the cross, and its both ends have the connecting portion of being connected with spiral case 100 erection joint, make additional strengthening 600 and spiral case 100 installation more firm.
Example 4:
as shown in fig. 1, the embodiment of the present application provides a noise reduction type centrifugal fan, in addition to including the above technical features, further, the impeller 300 is provided with a shaft disc 340, the shaft disc 340 is connected with an output shaft of the motor 200, the shaft disc 340 is connected with the rear cover plate 320, the shaft disc 340 is provided with a flow guiding end 341, and the flow guiding end 341 is in a conical shape.
Further, the volute 100 is provided with a sleeve 700, the sleeve 700 is sleeved outside the air collecting ring 400, a reinforcing plate 710 is arranged between the sleeve 700 and the air collecting ring 400, the reinforcing plate 710 is tapered, and the axis of the reinforcing plate is the same as the axis of the air collecting ring 400.
The shaft disc 340 is connected with an output shaft of the motor 200 in an installing mode, the impeller 300 is connected with the output shaft of the motor 200 in the installing mode through the shaft disc 340, the stability of the installing structure is improved, the shaft disc 340 is connected with the rear cover plate 320 through bolts and nuts, the flow guiding end 341 is conical, the side wall of the flow guiding end 341 has a certain radian, when airflow entering the volute 100 from the air inlet 101 collides on the shaft disc 340, the airflow slides out to the periphery through the flow guiding end 341, impact of the airflow on the shaft disc 340 and the rear cover plate 320 is reduced, and stability of the impeller 300 is improved.
The sleeve 700 is arranged outside the air collecting ring 400, the connection stability between the air collecting ring 400 and the volute 100 is improved through the sleeve 700, the reinforcing plate 710 is welded between the sleeve 700 and the air collecting ring 400, the reinforcing plate 710 is conical, one end of a small circle of the reinforcing plate is close to one end of a small circle of the air collecting ring 400 or is far away from the small circle of the air collecting ring 400, and the structural strength between the sleeve 700 and the air collecting ring 400 is improved through the reinforcing plate 710.
Compared with the common rib plate structure, the structure of the reinforcing plate 710 reduces the influence of the internal resistance of the volute 100 and the air resistance of the impeller 300 in the circumferential direction, and of course, the rib plate can be additionally arranged in the space surrounded by the sleeve 700, the air collecting ring 400 and the reinforcing plate 710, so that the structural strength is further improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element. Further, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions recited, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a type of making an uproar centrifugal fan falls which characterized in that includes:
a volute (100) comprising an air inlet (101) and an air outlet (102);
the motor (200) is arranged on the end face of the volute (100) and is far away from one side of the air inlet (101), and the motor (200) is provided with a base (210);
the impeller (300) is arranged in the volute (100) and is connected with the motor (200) in an installing mode, and the impeller (300) comprises a front cover plate (310), a rear cover plate (320) and blades (330);
the air collecting ring (400) is arranged on the air inlet (101), and the volute (100) is installed and connected;
the flow guide structure (500) is arranged on the inner wall surface of the air collecting ring (400), the flow guide structure (500) comprises a plurality of bulges (510), and the bulges (510) are uniformly distributed around the axis of the air collecting ring (400);
and the reinforcing structure (600) is arranged on the volute (100).
2. The noise reduction type centrifugal fan according to claim 1, wherein the air collecting ring (400) has a conical shape with a small end facing an inner side of the volute (100), and the protrusion (510) extends from the large end to the small end of the air collecting ring (400) and has an arc-shaped axis with a gradually decreasing cross-section.
3. The noise reduction type centrifugal fan according to claim 2, wherein the protrusion (510) comprises an outer side wall (511) and an inner side wall (512), the outer side wall (511) and the inner side wall (512) are arc-shaped in cross section, and the distance between the outer side wall (511) and the inner side wall (512) is the largest at the end contacting with the air collecting ring (400).
4. The noise reduction type centrifugal fan according to claim 1, wherein the reinforcing structure (600) is disposed on an outer wall surface of the volute (100), and the reinforcing structure (600) is connected with an output shaft of the motor (200) through a bearing.
5. The noise reduction type centrifugal fan according to claim 1, wherein the impeller (300) is provided with a shaft disc (340), the shaft disc (340) is connected with an output shaft of the motor (200), the shaft disc (340) is connected with the rear cover plate (320), the shaft disc (340) is provided with a flow guide end (341), and the flow guide end (341) is in a conical shape.
6. The noise reduction type centrifugal fan according to claim 2, wherein the volute (100) is provided with a sleeve (700), the sleeve (700) is sleeved outside the air collecting ring (400), a reinforcing plate (710) is arranged between the sleeve (700) and the air collecting ring (400), the reinforcing plate (710) is conical, and the axis of the reinforcing plate is the same as that of the air collecting ring (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221349206.1U CN218760492U (en) | 2022-05-27 | 2022-05-27 | Noise reduction type centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221349206.1U CN218760492U (en) | 2022-05-27 | 2022-05-27 | Noise reduction type centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218760492U true CN218760492U (en) | 2023-03-28 |
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ID=85689351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221349206.1U Active CN218760492U (en) | 2022-05-27 | 2022-05-27 | Noise reduction type centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218760492U (en) |
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2022
- 2022-05-27 CN CN202221349206.1U patent/CN218760492U/en active Active
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