CN201827150U - Flow guiding structure at impeller inlet of multistage centrifugal blower or multistage centrifugal compressor - Google Patents
Flow guiding structure at impeller inlet of multistage centrifugal blower or multistage centrifugal compressor Download PDFInfo
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- CN201827150U CN201827150U CN2010205631731U CN201020563173U CN201827150U CN 201827150 U CN201827150 U CN 201827150U CN 2010205631731 U CN2010205631731 U CN 2010205631731U CN 201020563173 U CN201020563173 U CN 201020563173U CN 201827150 U CN201827150 U CN 201827150U
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- multistage centrifugal
- impeller
- guide ring
- return channel
- centrifugal blower
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 7
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000007514 turning Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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Abstract
The utility model discloses a flow guiding structure at an impeller inlet of a multistage centrifugal blower or a multistage centrifugal compressor. The flow guiding structure at the impeller inlet comprises a backflow device, impellers, a shaft sleeve, a backflow device cover plate, an impeller cover, a wheel disc, an impeller blade inlet part and a backflow device blade outlet part. The flow guiding structure at the impeller inlet is characterized in that a flow guiding ring is arranged in an air flow channel, wherein the air flow channel consists of the backflow device, the impellers and the shaft sleeve and enables air flow to flow from an upper stage to the lower stage. The flow guiding structure can improve the air inlet conditions of the impellers of the existing multistage centrifugal blower or the multistage centrifugal compressor, restrain the air separation at the air inlet turning of the impeller, reduce secondary flow loss and improve the aerodynamic efficiency and the operation stability of the multistage centrifugal blower or the multistage centrifugal compressor.
Description
Technical field
The utility model relates to the impeller inlet guide ring in multistage centrifugal blower and the centrifugal compressor.
Background technique
Multistage centrifugal blower and multistage centrifugal compressor are widely used in the industrial departments such as metallurgy, petrochemical industry, power, sewage treatment.
Shown in Figure 1, multistage centrifugal blower and multistage centrifugal compressor are when work, and gas is sucked by induction chamber 1, and by being fixed on the 6 pairs of gas works done of impeller on the main shaft 2, gas pressure, speed, temperature improve; Flow into Diffuser 7 then, gas velocity reduces, pressure continues to improve; Bend 8 and return channel 9 play the guiding role, make gas flow into the next stage impeller, each grade is made up of an impeller and the retaining element that matches thereof such as Diffuser, bend and return channel etc., and such working procedure repeats, and the pressurized gas that final stage is come out are through spiral case 10 outputs.
Shown in Figure 2, in existing structural type, to outlet, airflow direction moves along a curved path by axially transferring to radially air-flow from the import of impeller 6 in each grade.Along with the distance of leaving impeller air-flow path centre of curvature increases, airspeed reduces, and pressure increases, therefore near enclosing cover for impeller 11 place's air-flows are by axial commentaries on classics radially the time, boundary layer separation district 14 takes place in convergence back diffusion at the enclosing cover for impeller turning earlier, and to 13 diffusions of impeller outlet place; And nearly hub disk 3 place's stream pressures produce the interference of the secondary flow vertical with impeller main air flow direction thus greater than nearly wheel cap side.These will cause the pneumatic efficiency of blower or compressor to reduce, and worsen gas flow.
The model utility content
The utility model is for avoiding above-mentioned existing in prior technology deficiency, the impeller inlet flow guide structure of a kind of multistage centrifugal blower or multistage centrifugal compressor is provided, to improve the impeller inlet air conditions of existing multistage centrifugal blower or centrifugal compressor, suppress wheel cap air inlet turning gas separation, reduce secondary flow and decrease, improve multistage centrifugal blower and centrifugal compressor pneumatic efficiency and running stability.
The utility model technical solution problem adopts following technological scheme:
The impeller inlet flow guide structure of the utility model multistage centrifugal blower or multistage centrifugal compressor includes return channel, impeller, axle sleeve, return channel cover plate, enclosing cover for impeller, wheel disc, impeller blade import position and return channel blade exit position; The utility model structural feature is air-flow to be flowed to by upper level in the air-flow path of next stage be provided with guide ring what form with return channel, impeller and axle sleeve.
The structural feature of the impeller inlet flow guide structure of the utility model multistage centrifugal blower or multistage centrifugal compressor also is:
Described guide ring in described air-flow path with the distance of enclosing cover for impeller than nearer with the distance of wheel disc, described guide ring and impeller blade import position and return channel blade exit position all maintain distance.
The guide ring revolution bus of described guide ring is a camber line.
Described guide ring by on the plane that is arranged in guide ring and the water conservancy diversion gusset that is disposed radially and the retaining ring that is positioned at the guide ring periphery be fixed in the inner groove of return channel cover plate.
The quantity of the quantity of described water conservancy diversion gusset and impeller blade and return channel blade is unequal, and arbitrarily between the two common divisor is not more than 2.
Described guide ring is connected with return channel dividing plate caudal lobe by sunk screw.
Compared with the prior art, the utility model beneficial effect is embodied in:
Impeller inlet guide ring of the present utility model changes the air flow state at impeller air inlet position: when the high-octane air-flow of part enters the wheel cap turning, the separation of air-flow diffusion is suppressed, reduce the adverse effect that secondary flow is brought in the impeller simultaneously, effectively improved the pneumatic efficiency and the running stability of multistage centrifugal blower or multistage centrifugal compressor.
Description of drawings
Fig. 1 is multistage centrifugal blower or a multistage centrifugal compressor cross-sectional view in the prior art;
Fig. 2 is the channel cross-section figure that multistage centrifugal blower or multistage centrifugal compressor impeller and return channel form in the prior art;
Fig. 3 is the utility model structural representation;
Fig. 4 is another mode of execution structural representation of the utility model;
Fig. 5 a is a guide ring sectional structure schematic representation in the utility model;
Fig. 5 b is a guide ring plan view in the utility model;
Fig. 5 c is a guide ring side view in the utility model;
Fig. 6 a is a sectional structure schematic representation in another mode of execution of the utility model;
Fig. 6 b is a guide ring side-looking structural representation in another mode of execution of the utility model.
Number in the figure: 1 induction chamber, 2 main shafts, 3 hub disks, 4 return channel blade exit positions, 5 return channel cover plates, 6 impellers, 7 Diffusers, 8 bends, 9 return channels, 10 spiral cases, 11 enclosings cover for impeller, 12 axle sleeves, 13 impeller outlet places, the boundary layer separation district takes place in 14 enclosing cover for impeller turnings, 15 guide rings revolution bus, 16 water conservancy diversion gussets, 17 retaining rings, 18 impeller blade import positions, 19 guide rings, 20 return channel dividing plate caudal lobes, 21 sunk screws.
Embodiment
Embodiment 1:
Referring to Fig. 3, Fig. 5 a, Fig. 5 b and Fig. 5 c, in the present embodiment, at return channel 9, the air-flow that makes that forms between impeller 6 and the axle sleeve 12 is flowed in the air-flow path of next stage by upper level, guide ring 19 is set, guide ring 19 is by on the plane that is positioned at guide ring, and water conservancy diversion gusset 16 that is disposed radially and the retaining ring 17 that is arranged in the guide ring periphery are fixed in the inner groove of return channel cover plate 5, guide ring 19 in air-flow path with the distance of enclosing cover for impeller 11 than nearer with the distance of wheel disc 3, guide ring 19 all maintains distance with impeller blade import position 18 and return channel blade exit position 4, to avoid interference, guide ring revolution bus 15 is a camber line.
For the ease of being provided with, in the present embodiment, the quantity of water conservancy diversion gusset 16 can not equate with the quantity of impeller blade and return channel blade, and between the two common divisor is not more than 2 arbitrarily, such as: suppose that the water conservancy diversion reinforcing plate number is 11, the impeller blade number is 12, then the quantity of return channel blade can be 13 or 14, is unallowed but the quantity of return channel blade is taken as 15 or 16, here, 15, have common divisor 3 and 4 between 16 and 12 respectively, all greater than 2.
Embodiment 2:
Referring to Fig. 4, Fig. 6 a and Fig. 6 b, different is with embodiment 1, in the present embodiment, guide ring 19 is fixed on the return channel dividing plate caudal lobe (20) by sunk screw (21), in this structural type, do not need to be provided with water conservancy diversion gusset 16 and retaining ring 17 on the guide ring 19, other structural type is all identical with embodiment.
Claims (6)
1. the impeller inlet flow guide structure of multistage centrifugal blower or multistage centrifugal compressor includes return channel (9), impeller (6), axle sleeve (12), return channel cover plate (5), enclosing cover for impeller (11), wheel disc (3), impeller blade import position (18) and return channel blade exit position (4); It is characterized in that air-flow being flowed to by upper level in the air-flow path of next stage be provided with guide ring (19) what form with return channel (9), impeller (6) and axle sleeve (12).
2. the impeller inlet flow guide structure of multistage centrifugal blower according to claim 1 or multistage centrifugal compressor, it is characterized in that described guide ring (19) in described air-flow path with the distance of enclosing cover for impeller (11) than nearer with the distance of wheel disc (3), described guide ring (19) all maintains distance with impeller blade import position (18) and return channel blade exit position (4).
3. the impeller inlet flow guide structure of multistage centrifugal blower according to claim 1 or multistage centrifugal compressor is characterized in that the guide ring revolution bus (15) of described guide ring (19) is camber line.
4. the impeller inlet flow guide structure of multistage centrifugal blower according to claim 1 or multistage centrifugal compressor, the described guide ring of its feature (19) by on the plane that is arranged in guide ring and the water conservancy diversion gusset (16) that is disposed radially and the retaining ring (17) that is positioned at the guide ring periphery be fixed in the inner groove of return channel cover plate (5).
5. the impeller inlet flow guide structure of multistage centrifugal blower according to claim 4 or multistage centrifugal compressor, the quantity that it is characterized in that the quantity of described water conservancy diversion gusset (16) and impeller blade and return channel blade is unequal, and between the two common divisor is not more than 2 arbitrarily.
6. the impeller inlet flow guide structure of multistage centrifugal blower according to claim 1 or multistage centrifugal compressor is characterized in that described guide ring (19) is connected with return channel dividing plate caudal lobe (20) by sunk screw (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205631731U CN201827150U (en) | 2010-10-15 | 2010-10-15 | Flow guiding structure at impeller inlet of multistage centrifugal blower or multistage centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205631731U CN201827150U (en) | 2010-10-15 | 2010-10-15 | Flow guiding structure at impeller inlet of multistage centrifugal blower or multistage centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201827150U true CN201827150U (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205631731U Expired - Fee Related CN201827150U (en) | 2010-10-15 | 2010-10-15 | Flow guiding structure at impeller inlet of multistage centrifugal blower or multistage centrifugal compressor |
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| Country | Link |
|---|---|
| CN (1) | CN201827150U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949393A (en) * | 2010-10-15 | 2011-01-19 | 合肥通用机械研究院 | Multistage centrifugal blower or impeller inlet flowing guide structure of multistage centrifugal compressor |
| CN102840170A (en) * | 2012-10-09 | 2012-12-26 | 宁波风机有限公司 | Air inlet guiding device for large-sized centrifugal fan |
| CN103016363A (en) * | 2011-09-26 | 2013-04-03 | 珠海格力电器股份有限公司 | Centrifugal compressor and control method thereof |
| CN110080999A (en) * | 2019-05-15 | 2019-08-02 | 江苏乘帆压缩机有限公司 | A kind of centrifugal blower with efficient aerodynamic efficiency |
| CN113374706A (en) * | 2021-06-22 | 2021-09-10 | 铁善奎 | Multistage centrifugal blower |
-
2010
- 2010-10-15 CN CN2010205631731U patent/CN201827150U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949393A (en) * | 2010-10-15 | 2011-01-19 | 合肥通用机械研究院 | Multistage centrifugal blower or impeller inlet flowing guide structure of multistage centrifugal compressor |
| CN103016363A (en) * | 2011-09-26 | 2013-04-03 | 珠海格力电器股份有限公司 | Centrifugal compressor and control method thereof |
| CN103016363B (en) * | 2011-09-26 | 2016-01-20 | 珠海格力电器股份有限公司 | Centrifugal compressor and control method thereof |
| CN102840170A (en) * | 2012-10-09 | 2012-12-26 | 宁波风机有限公司 | Air inlet guiding device for large-sized centrifugal fan |
| CN102840170B (en) * | 2012-10-09 | 2016-01-27 | 宁波风机有限公司 | A kind of large centrifugal fan intake grill flow guide device |
| CN110080999A (en) * | 2019-05-15 | 2019-08-02 | 江苏乘帆压缩机有限公司 | A kind of centrifugal blower with efficient aerodynamic efficiency |
| CN113374706A (en) * | 2021-06-22 | 2021-09-10 | 铁善奎 | Multistage centrifugal blower |
| CN113374706B (en) * | 2021-06-22 | 2024-05-24 | 徐春青 | Multistage centrifugal blower |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20111015 |