CN220748571U - One-level impeller cantilever supports and axial inspiratory doublestage centrifugal fan - Google Patents
One-level impeller cantilever supports and axial inspiratory doublestage centrifugal fan Download PDFInfo
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- CN220748571U CN220748571U CN202322352492.8U CN202322352492U CN220748571U CN 220748571 U CN220748571 U CN 220748571U CN 202322352492 U CN202322352492 U CN 202322352492U CN 220748571 U CN220748571 U CN 220748571U
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Abstract
The utility model belongs to the technical field of two-stage centrifugal ventilators, and particularly discloses a two-stage centrifugal ventilator with a one-stage impeller supported by a cantilever and sucking air axially, which comprises a main shaft, and a one-stage fan impeller set and a two-stage fan impeller set which are arranged on the main shaft, wherein a non-positioning bearing box and a positioning bearing box are respectively arranged on two sides of the main shaft, the two-stage fan impeller set is positioned between the positioning bearing box and the non-positioning bearing box, and the one-stage fan impeller set is positioned on one side of the non-positioning bearing box far away from the two-stage fan impeller set; the air outlet of the primary fan impeller set is communicated with the secondary fan impeller set through a communicating piece. The utility model has the advantages of compact structural design, convenient installation and reliable operation, not only occupies smaller space during installation and saves the use space, but also enlarges the pressure of the gas through two-stage supercharging, thereby meeting the performance requirement.
Description
Technical Field
The utility model belongs to the technical field of two-stage centrifugal ventilators, and particularly relates to a two-stage centrifugal ventilator which is supported by a cantilever of a one-stage impeller and sucks air axially.
Background
In the design and model selection process of the centrifugal machine, one centrifugal fan cannot meet the performance requirement due to various reasons, so that a plurality of centrifugal fans are often connected in parallel or in series to meet the performance requirement, but due to the structure, the centrifugal fans are large in whole, occupy large installation positions during installation, and meanwhile are driven to operate by motors, and the manufacturing cost is high.
The existing centrifugal fan mainly comprises a transmission shell and a transmission fan impeller, wherein the transmission shell mainly comprises a single-suction transmission shell and a double-suction transmission shell, the single-suction transmission shell consists of an air inlet box and a volute, the double-suction transmission shell consists of two air inlet boxes and a volute, the transmission fan impeller is positioned in the volute, and the structure is combined and connected in any way, so that the defect of smaller air pressure of the fan exists.
Disclosure of Invention
The utility model aims to provide a two-stage centrifugal ventilator with a cantilever support of a one-stage impeller and axial air suction, so as to solve the problem of small air pressure of the conventional centrifugal fan.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the two-stage centrifugal ventilator comprises a main shaft, a first-stage fan impeller set and a second-stage fan impeller set, wherein the first-stage fan impeller set and the second-stage fan impeller set are arranged on the main shaft, a non-positioning bearing box and a positioning bearing box are respectively arranged on two sides of the main shaft, the second-stage fan impeller set is positioned between the positioning bearing box and the non-positioning bearing box, and the first-stage fan impeller set is positioned on one side, far away from the second-stage fan impeller set, of the non-positioning bearing box; the air outlet of the primary fan impeller set is communicated with the secondary fan impeller set through a communicating piece.
Further, the primary fan impeller group comprises a primary air inlet, a primary impeller and a primary shell group, one side of the primary air inlet is used for axially feeding air, the other side of the primary air inlet is connected with the primary shell group, and the primary impeller is arranged in the primary shell group; the secondary fan impeller group comprises a secondary air inlet box, a secondary air inlet, a secondary impeller and a secondary shell group, wherein two sides of the secondary air inlet are respectively connected with the secondary air inlet box and the secondary shell group, the secondary impeller is arranged in the secondary shell group, the main shaft is respectively fixed with the primary impeller and the secondary impeller, and the main shaft is respectively connected with the primary shell group, the secondary shell group and the secondary air inlet box in a rotating way.
Further, an air outlet box is arranged at the air outlet of the primary shell group, and the air outlet box is connected with the secondary air inlet box through the communication piece.
Further, the communicating piece adopts a connecting bent pipe.
Further, the secondary air inlet box comprises an air inlet upper box body and an air inlet lower box body which are arranged up and down and are communicated, and the air inlet upper box body is an arc box body which is in transition from a circular structure to a rectangular structure from top to bottom; the upper side of the air inlet lower box body is matched with and communicated with the rectangular structure; one side of the air inlet lower box body is provided with a first through hole connected with the main shaft, and the other side of the air inlet lower box body is provided with a second through hole connected with the second-stage air inlet.
Further, the structure of the air outlet box is the same as that of the air inlet upper box body, the rectangular structure of the air outlet box is connected with the air outlet of the primary shell group, and the circular structure of the air outlet box is connected with the communicating piece.
Further, the diameter of the circular structure is smaller than the length of the rectangular structure and larger than the width of the rectangular structure.
Further, the lower box that admits air includes upper rectangular cavity and the half arc cavity of lower that sets up from top to bottom and communicates, the length of upper rectangular cavity equals the diameter of half arc cavity down.
The working principle of the technical scheme is as follows: the gas enters from the first air inlet along the axial direction, after doing work through the first impeller set, the gas pressure is increased, then the gas with increased pressure enters into the first shell set, is discharged from the air outlet of the first shell set to the air outlet box, then enters into the second air inlet box through the connecting bent pipe, then sequentially passes through the second air inlet, the second impeller and the second shell set, further increases through the second She Lunzuo work, reaches the pressure requirement, and finally is discharged through the air outlet of the second shell set.
The beneficial effects of this technical scheme lie in:
(1) the utility model has the advantages of compact structural design, convenient installation and reliable operation, not only occupies smaller space during installation and saves the use space, but also enlarges the pressure of the gas through two-stage supercharging, thereby meeting the performance requirement.
(2) This technical scheme has carried out the arc design to the structure of second grade air inlet box and air outlet box, can make the inlet air more add even and alleviate smoothly.
(3) The side of the lower air inlet box body is a plane, so that the stability of connection of the lower air inlet box body with the main shaft and the secondary air inlet can be ensured.
Drawings
FIG. 1 is a perspective view of a one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan of the present utility model;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a bottom view of FIG. 1;
fig. 4 is a schematic structural view of the secondary intake box in fig. 1.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the device comprises a primary air inlet 1, a primary shell group 2, a main shaft 3, an air outlet box 4, a communicating piece 5, a secondary air inlet box 6, a secondary air inlet 7, a secondary shell group 8, a secondary impeller 9, a circular structure 10, a positioning bearing box 11, a non-positioning bearing box 12, an air inlet upper box 13, an air inlet lower box 14, an upper rectangular cavity 15, a lower semi-arc cavity 16, a first through hole 17 and a second through hole 18.
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment is basically as shown in the accompanying figures 1-4: the utility model provides a one-level impeller cantilever support and axial absorbing doublestage centrifugal fan, includes main shaft 3 and set up the one-level fan impeller group and the second grade fan impeller group on main shaft 3, and the both sides of main shaft 3 are equipped with non-location bearing box 12 and location bearing box 11 respectively, and the second grade fan impeller group is located between location bearing box 11 and the non-location bearing box 12, and the one-level fan impeller group is located the one side that is kept away from the second grade fan impeller group of non-location bearing box 12.
The primary fan impeller set comprises a primary air inlet 1, a primary impeller and a primary shell set 2, wherein one side of the primary air inlet 1 is used for axially feeding air, the other side of the primary air inlet is connected with the primary shell set 2, and the primary impeller is arranged in the primary shell set 2; the secondary fan impeller group comprises a secondary air inlet box 6, a secondary air inlet 7, a secondary impeller 9 and a secondary shell group 8, wherein two sides of the secondary air inlet 7 are respectively connected with the secondary air inlet box 6 and the secondary shell group 8, the secondary impeller 9 is arranged in the secondary shell group 8, the main shaft 3 is respectively fixed with the primary impeller and the secondary impeller 9, and the main shaft 3 is respectively connected with the primary shell group 2, the secondary shell group 8 and the secondary air inlet box 6 in a rotating way. An air outlet box 4 is arranged at the air outlet of the primary shell group 2, the air outlet box 4 is connected with a secondary air inlet box 6 through a communicating piece 5, and the communicating piece 5 adopts a connecting bent pipe.
As shown in fig. 4, the secondary air intake box 6 includes an air intake upper box 13 and an air intake lower box 14 which are arranged up and down and are communicated, the air intake upper box 13 is an arc box which is transited from a circular structure 10 to a rectangular structure from top to bottom, and the diameter of the circular structure 10 is smaller than the length of the rectangular structure and larger than the width of the rectangular structure. The air inlet lower box body 14 comprises an upper rectangular cavity 15 and a lower semi-arc cavity 16 which are arranged up and down and are communicated, and the length of the upper rectangular cavity 15 is equal to the diameter of the lower semi-arc cavity 16. The upper side of the air inlet lower box body 14 is matched with and communicated with the rectangular structure; one side of the lower air inlet box body 14 is provided with a first through hole 17 connected with the main shaft 3, and the other side of the lower air inlet box body 14 is provided with a second through hole 18 connected with the secondary air inlet 7. The structure of the air outlet box 4 is the same as that of the air inlet upper box 13, the rectangular structure of the air outlet box 4 is connected with the air outlet of the primary shell group 2, and the circular structure 10 of the air outlet box 4 is connected with the communicating piece 5.
The specific implementation process is as follows:
the gas enters from the first-stage air inlet 1 along the axial direction, after working through the first-stage impeller assembly, the gas pressure is increased, then the gas with increased pressure enters into the first-stage casing assembly 2, is discharged from the air outlet of the first-stage casing assembly 2 to the air outlet box 4, then enters into the second-stage air inlet box 6 through the connecting bent pipe, then sequentially passes through the second-stage air inlet 7, the second-stage impeller 9 and the second-stage casing assembly 8, works through the second-stage impeller 9, the gas pressure is further increased, the pressure requirement is met, and finally the gas is discharged through the air outlet of the second-stage casing assembly 8.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, 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.
The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present utility model, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. A one-level impeller cantilever supports and doublestage centrifugal fan of axial breathing in, its characterized in that: the device comprises a main shaft (3), and a primary fan impeller set and a secondary fan impeller set which are arranged on the main shaft (3), wherein a non-positioning bearing box (12) and a positioning bearing box (11) are respectively arranged on two sides of the main shaft (3), the secondary fan impeller set is positioned between the positioning bearing box (11) and the non-positioning bearing box (12), and the primary fan impeller set is positioned on one side of the non-positioning bearing box (12) far away from the secondary fan impeller set; the air outlet of the primary fan impeller set is communicated with the secondary fan impeller set through a communicating piece (5).
2. The one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan of claim 1, wherein: the primary fan impeller set comprises a primary air inlet (1), a primary impeller and a primary shell set (2), wherein one side of the primary air inlet (1) is used for axially feeding air, the other side of the primary air inlet is connected with the primary shell set (2), and the primary impeller is arranged in the primary shell set (2); the secondary fan impeller group comprises a secondary air inlet box (6), a secondary air inlet (7), a secondary impeller (9) and a secondary shell group (8), wherein two sides of the secondary air inlet (7) are respectively connected with the secondary air inlet box (6) and the secondary shell group (8), the secondary impeller (9) is arranged in the secondary shell group (8), the main shaft (3) is respectively fixed with the primary impeller and the secondary impeller (9), and the main shaft (3) is respectively connected with the primary shell group (2), the secondary shell group (8) and the secondary air inlet box (6) in a rotating mode.
3. The one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan of claim 2, wherein: an air outlet box (4) is arranged at the air outlet of the primary shell group (2), and the air outlet box (4) is connected with the secondary air inlet box (6) through the communication piece (5).
4. The one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan of claim 1, wherein: the communicating piece (5) adopts a connecting bent pipe.
5. A one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan according to claim 3, wherein: the secondary air inlet box (6) comprises an air inlet upper box body (13) and an air inlet lower box body (14) which are arranged up and down and are communicated, and the air inlet upper box body (13) is an arc box body which is in transition from a circular structure (10) to a rectangular structure from top to bottom; the upper side of the air inlet lower box body (14) is matched with and communicated with the rectangular structure; one side of the air inlet lower box body (14) is provided with a first through hole (17) connected with the main shaft (3), and the other side of the air inlet lower box body (14) is provided with a second through hole (18) connected with the secondary air inlet (7).
6. The one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan of claim 5, wherein: the structure of the air outlet box (4) is the same as that of the air inlet upper box body (13), the rectangular structure of the air outlet box (4) is connected with the air outlet of the primary shell group (2), and the circular structure (10) of the air outlet box (4) is connected with the communicating piece (5).
7. The one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan of claim 5, wherein: the diameter of the circular structure (10) is smaller than the length of the rectangular structure and larger than the width of the rectangular structure.
8. The one-stage impeller cantilever supported and axially aspirated two-stage centrifugal fan of claim 5, wherein: the air inlet lower box body (14) comprises an upper rectangular cavity (15) and a lower semi-arc cavity (16) which are arranged up and down and are communicated, and the length of the upper rectangular cavity (15) is equal to the diameter of the lower semi-arc cavity (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322352492.8U CN220748571U (en) | 2023-08-31 | 2023-08-31 | One-level impeller cantilever supports and axial inspiratory doublestage centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322352492.8U CN220748571U (en) | 2023-08-31 | 2023-08-31 | One-level impeller cantilever supports and axial inspiratory doublestage centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN220748571U true CN220748571U (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322352492.8U Active CN220748571U (en) | 2023-08-31 | 2023-08-31 | One-level impeller cantilever supports and axial inspiratory doublestage centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220748571U (en) |
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2023
- 2023-08-31 CN CN202322352492.8U patent/CN220748571U/en active Active
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