CN220037035U - Axial force balancing structure of impeller of air compressor - Google Patents
Axial force balancing structure of impeller of air compressor Download PDFInfo
- Publication number
- CN220037035U CN220037035U CN202320937484.7U CN202320937484U CN220037035U CN 220037035 U CN220037035 U CN 220037035U CN 202320937484 U CN202320937484 U CN 202320937484U CN 220037035 U CN220037035 U CN 220037035U
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- impeller
- diffuser
- axial force
- balance disc
- air compressor
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- 238000007789 sealing Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to the field of air compressors, in particular to an axial force balancing structure of an impeller of an air compressor. The centrifugal impeller comprises a diffuser, wherein an impeller is arranged on one side of the diffuser, a bearing seat is arranged on the other side of the diffuser, the impeller is arranged on a main shaft, a clearance fit is arranged between the wheel back end face of the impeller and the diffuser end face, a balance disc is fixedly arranged on the main shaft between the diffuser and the bearing seat, the end faces on two sides of the balance disc are respectively in clearance fit with the diffuser and the bearing seat, a clearance between the impeller and the diffuser is communicated with a clearance between the balance disc and the diffuser, and a labyrinth structure is arranged between the outer circle surface of the balance disc and the bearing seat. The axial force applied to the impeller wheel back is divided into two parts, one part acts on the impeller wheel back, the other part acts on the diffuser back, and the axial force applied by the diffuser does not act on the shafting any more, so that the axial force of the impeller is effectively reduced, the movement of the impeller and the main shaft is reduced, the rotating speed of the impeller is improved, the stability of the impeller is improved, and the compression efficiency of the impeller is improved.
Description
Technical field:
the utility model relates to the field of air compressors, in particular to an axial force balancing structure of an impeller of an air compressor.
The background technology is as follows:
in the centrifugal air compressor structure, after the air is pressurized by the impeller, the pressure is increased, the kinetic energy is greatly increased, the pressure of the air is further increased by fully utilizing the kinetic energy, a diffuser is arranged at the position close to the outlet of the impeller, the impeller is fixed on the main shaft and rotates along with the main shaft at a high speed during installation, the diffuser is fixedly arranged on the shell, and the impeller and the diffuser are in clearance fit. When the air pump works, most of the air pressurized by the impeller flows into the volute to undergo secondary diffusion, and a small amount of air flows into the motor cavity through a gap between the impeller wheel back and the diffuser. Because the gas pressure at the top of the impeller is close to the atmospheric pressure and does not undergo the pressurizing process, a pressure difference is generated between the top of the impeller and the end face of the back of the impeller, and an axial force is generated on the impeller, so that the axial movement of the impeller is increased, the rotating speed of the impeller is reduced, and the stability of the impeller is affected.
In summary, in the field of centrifugal air compressors, the problem of axial force of the impeller wheel back has become a technical problem to be solved in the industry.
The utility model comprises the following steps:
the utility model provides an axial force balancing structure of an impeller of an air compressor to make up for the defects of the prior art, and solves the problems that axial movement of the impeller is increased, the rotating speed of the impeller is reduced and the stability of the impeller is influenced due to the fact that axial force is generated between a back of the impeller and a diffuser in the past.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides an air compressor impeller axial force balanced structure, includes the diffuser, and diffuser one side is equipped with the impeller, and the opposite side is equipped with the bearing frame, and the impeller is installed on the main shaft, clearance fit between the wheel back terminal surface of impeller and the diffuser terminal surface, fixed mounting has the balance disc on the main shaft between diffuser and the bearing frame, the both sides terminal surface of balance disc respectively with the diffuser with the clearance fit between the bearing frame, clearance between impeller and the diffuser is linked together with the clearance between balance disc and the diffuser, be equipped with labyrinth structure between the excircle surface of balance disc and the bearing frame.
And the end face of the bearing seat is provided with a balance disc groove in clearance fit with the balance disc.
The labyrinth structure comprises a plurality of annular grooves arranged in the side wall of the balance disc groove, and the annular grooves correspond to the positions of the outer circle surfaces of the balance disc.
The gap between the impeller and the diffuser is the same as the gap between the balance disc and the diffuser.
And the end face of the diffuser is provided with an impeller groove which is in clearance fit with the impeller back.
And a sealing sleeve is fixedly arranged on the main shaft between the impeller and the balance disc.
The shaft end of the main shaft is provided with a lock nut for compressing and fixing the impeller, the sealing sleeve and the balance disc.
The utility model adopts the scheme and has the following advantages:
through installing the balance plate on the main shaft between diffuser and bearing frame, the clearance fit between balance plate and the diffuser, the gas that gets into between impeller wheel back and the diffuser can get into the clearance between balance plate and the diffuser simultaneously to the axial force that receives with the impeller wheel back falls into two parts, and wherein part acts on the impeller wheel back, and another part acts on the diffuser back, because the diffuser is fixed on the air compressor machine casing, the axial force that the diffuser bore no longer acts on the shafting, thereby reduces the axial force of impeller effectively, reduces the play volume of impeller and main shaft, reduces the axial force of thrust bearing, and the impeller rotational speed improves, promotes the stability of impeller, does benefit to the compression efficiency that promotes the impeller.
Description of the drawings:
fig. 1 is a schematic cross-sectional view of the present utility model.
In the figure, 1, an impeller, 2, a diffuser, 3, a bearing seat, 4, a main shaft, 5, a balance disc, 6, an annular groove, 7 and a sealing sleeve.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in FIG. 1, an axial force balancing structure of an impeller of an air compressor comprises a diffuser 2, wherein one side of the diffuser 2 is provided with the impeller 1, the other side of the diffuser 2 is provided with a bearing seat 3, the impeller 1 is arranged on a main shaft 4, clearance fit is arranged between the back end face of the impeller 1 and the end face of the diffuser 2, a balancing disc 5 is fixedly arranged on the main shaft 4 between the diffuser 2 and the bearing seat 3, two side end faces of the balancing disc 5 are respectively in clearance fit with the diffuser 2 and the bearing seat 3, the clearance between the impeller 1 and the diffuser 2 is communicated with the clearance between the balancing disc 5 and the diffuser 2, and a labyrinth structure is arranged between the outer circle surface of the balancing disc 5 and the bearing seat 3.
The end face of the bearing seat 3 is provided with a balance disc groove in clearance fit with the balance disc 5, and the balance disc 5 is placed in the balance disc groove in clearance fit.
The labyrinth structure comprises a plurality of annular grooves 6 arranged in the side wall of the balancing disc groove, the annular grooves 6 correspond to the outer circle surface of the balancing disc 5 in position, gas can be reduced to enter the motor cavity through the labyrinth structure, the pressure of the gas behind the wheel back of the impeller 1 and the pressure of the gas behind the diffuser 2 are consistent, the axial force generated by the gas is consistent, and the effect of balancing the axial force is improved.
The size of the gap between the impeller 1 and the diffuser 2 is the same as that of the gap between the balance disc 5 and the diffuser 2, and in order to make the gas pressure of the back of the impeller 1 and the back of the diffuser 2 consistent, the axial force generated by the gas is consistent, so that the effect of balancing the axial force is improved.
The end face of the diffuser 2 is provided with an impeller groove in clearance fit with the back of the impeller 1, and the impeller 1 is placed in the impeller groove in clearance fit.
A sealing sleeve 7 is fixedly arranged on the main shaft 4 between the impeller 1 and the balance disc 5 and is used for preventing gas from leaking from a gap between the bearing seat 3 and the main shaft 4 to a motor cavity.
The shaft end of the main shaft 4 is provided with a lock nut for compressing and fixing the impeller 1, the sealing sleeve 7 and the balance disc 5.
Working principle:
during operation, most of the gas pressurized by the impeller 1 flows into the volute to undergo secondary diffusion, a small amount of gas enters a gap between the impeller 1 wheel back and the diffuser 2, the gap between the impeller 1 and the diffuser 2 is communicated with the gap between the balance disc 5 and the diffuser 2, and the gas entering the gap between the impeller 1 wheel back and the diffuser 2 can enter the gap between the balance disc 5 and the diffuser 2 at the same time, so that the axial force born by the impeller 1 wheel back is divided into two parts, one part acts on the impeller 1 wheel back, the other part acts on the diffuser 2 back, and the diffuser 2 is fixed on the air compressor shell, so that the axial force born by the diffuser 2 is not acted on the shafting any more, thereby effectively reducing the axial force of the impeller 1, reducing the channeling quantity of the impeller 1 and the main shaft 4, reducing the axial force of the thrust bearing, improving the rotating speed of the impeller 1, and being beneficial to improving the compression efficiency of the impeller 1.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (7)
1. The utility model provides an air compressor impeller axial force balanced structure, includes the diffuser, and diffuser one side is equipped with the impeller, and the opposite side is equipped with the bearing frame, and the impeller is installed on the main shaft, its characterized in that: the impeller is characterized in that a wheel back end face of the impeller is in clearance fit with a diffuser end face, a balance disc is fixedly installed on a main shaft between the diffuser and the bearing seat, two side end faces of the balance disc are respectively in clearance fit with the diffuser and the bearing seat, a clearance between the impeller and the diffuser is communicated with a clearance between the balance disc and the diffuser, and a labyrinth structure is arranged between the outer circle surface of the balance disc and the bearing seat.
2. An air compressor impeller axial force balance structure according to claim 1, wherein: and the end face of the bearing seat is provided with a balance disc groove in clearance fit with the balance disc.
3. An air compressor impeller axial force balance structure according to claim 2, wherein: the labyrinth structure comprises a plurality of annular grooves arranged in the side wall of the balance disc groove, and the annular grooves correspond to the positions of the outer circle surfaces of the balance disc.
4. An air compressor impeller axial force balance structure according to claim 1, wherein: the gap between the impeller and the diffuser is the same as the gap between the balance disc and the diffuser.
5. An air compressor impeller axial force balance structure according to claim 1, wherein: and the end face of the diffuser is provided with an impeller groove which is in clearance fit with the impeller back.
6. An air compressor impeller axial force balance structure according to claim 1, wherein: and a sealing sleeve is fixedly arranged on the main shaft between the impeller and the balance disc.
7. An air compressor wheel axial force balance structure of claim 6, wherein: the shaft end of the main shaft is provided with a lock nut for compressing and fixing the impeller, the sealing sleeve and the balance disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320937484.7U CN220037035U (en) | 2023-04-19 | 2023-04-19 | Axial force balancing structure of impeller of air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320937484.7U CN220037035U (en) | 2023-04-19 | 2023-04-19 | Axial force balancing structure of impeller of air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220037035U true CN220037035U (en) | 2023-11-17 |
Family
ID=88741715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320937484.7U Active CN220037035U (en) | 2023-04-19 | 2023-04-19 | Axial force balancing structure of impeller of air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220037035U (en) |
-
2023
- 2023-04-19 CN CN202320937484.7U patent/CN220037035U/en active Active
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