CN204610381U - A kind of centrifugal blower of impeller air inlet end band labyrinth seal structure - Google Patents
A kind of centrifugal blower of impeller air inlet end band labyrinth seal structure Download PDFInfo
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- CN204610381U CN204610381U CN201520247331.5U CN201520247331U CN204610381U CN 204610381 U CN204610381 U CN 204610381U CN 201520247331 U CN201520247331 U CN 201520247331U CN 204610381 U CN204610381 U CN 204610381U
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- tooth
- impeller
- rectangular saw
- inlet end
- air inlet
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Abstract
The utility model discloses a kind of centrifugal blower of impeller air inlet end band labyrinth seal structure.The slip ring of existing centrifugal blower and between impeller and spiral case air-flow can reflux, produce whirlpool, and there is gap between slip ring and impeller eye, easily make air-flow leak, cause fan efficiency to decline.Slip ring outlet side of the present utility model is stretched in the wheel cap of centrifugal impeller; Rectangular saw-tooth sealing configuration is provided with inside centrifugal impeller air inlet end; Rectangular saw-tooth sealing configuration comprises 4 ~ 6 rectangular saw-tooth; The axial spacing of adjacent two rectangular saw-tooth is 5 ~ 10mm; The height of each rectangular saw-tooth is 5 ~ 10mm, and thickness is 0.2 ~ 0.5 of height; The distance of each rectangular saw-tooth and slip ring outer wall is 0.005 ~ 0.04 of centrifugal impeller air inlet end internal diameter.The utility model can produce very strong throttle effect, plays the effect of non-contact seals, improves the stability of inlet air flow, improves volumetric efficiency.
Description
Technical field
The utility model belongs to field of ventilation equipment, relates to centrifugal blower, is specifically related to a kind of centrifugal blower of impeller air inlet end band labyrinth seal structure.
Background technique
Centrifugal blower is primarily of structure compositions such as slip ring, impeller, spiral case and diffusers.Gas is through slip ring guide vane wheel, and under the turning effort of impeller, to air work, pressure raises.From impeller gas out, collected by spiral case and guide to volute outlet, and after after diffuser again diffusion, be transported to pipeline or enter in air.As the air inlet system of centrifugal blower, the effect of slip ring is by gas guide vane wheel smoothly, ensures impeller eye uniform stream, reaches the object improving impeller adiabatic efficiency.
Owing to there is gap between slip ring and impeller eye, impeller outlet place gas is raised by impeller acting pressure, and the pressure of inlet is much lower, the gas in outlet port is caused again to flow through impeller by gap outside impeller, the rate of discharge of ventilator is made to be less than inlet flow rate, cause the volumetric loss of blower fan, thus reduce the entirety effect of blower fan.In Centrifugal Fan Impeller ingress, air-flow mainly flows vertically, and after entering impeller, air-flow gradually becomes Radial Flow.Therefore, near impeller eye, flow parameter changes greatly, and be subject to the impact of vortex, slip ring back, the vortex that easy formation is larger, its size, with the change of circumferential position, the size of compressor flow and different, is a main source of centrifugal blower loss and noise.Due to the deficiency in structural design, the slip ring on existing centrifugal blower and between impeller and spiral case air-flow can reflux, produce whirlpool, and there is gap between slip ring and impeller eye, easily make air-flow leak, cause fan efficiency to decline, noise rising.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, a kind of centrifugal blower of impeller air inlet end band labyrinth seal structure is provided, the centrifugal impeller air inlet end of this centrifugal blower is processed with labyrinth seal structure, very strong throttle effect can be produced, play the effect of non-contact seals, improve the stability of inlet air flow, improve volumetric efficiency.
The utility model comprises slip ring and centrifugal impeller; Described slip ring is tubular, and its outlet side is stretched in the wheel cap of centrifugal impeller, and the ratio of the axial length stretched into and centrifugal impeller external diameter is 0.01 ~ 0.06; Rectangular saw-tooth sealing configuration is provided with inside described centrifugal impeller air inlet end; Described rectangular saw-tooth sealing configuration comprises along centrifugal impeller axially equidistant 4 ~ 6 rectangular saw-tooth of arranging; The axial spacing of described adjacent two rectangular saw-tooth is 5 ~ 10mm; The height of each rectangular saw-tooth is 5 ~ 10mm, and thickness is 0.2 ~ 0.5 of height; Along centrifugal impeller air inlet end to direction, outlet side, the height of rectangular saw-tooth successively decreases; The distance of each rectangular saw-tooth and slip ring outer wall is 0.005 ~ 0.04 of centrifugal impeller air inlet end internal diameter.
The beneficial effects of the utility model:
The utility model adopts labyrinth seal structure at the gap location of slip ring and centrifugal impeller, effectively can reduce the radial clearance between slip ring and centrifugal impeller air inlet end, improve the stability of air-flow, reduce the leakage rate of air-flow, reduce volumetric loss, raise the efficiency, reduce noise.
Accompanying drawing explanation
Fig. 1 is fragmentary perspective cross sectional view of the present utility model;
Fig. 2 is the partial enlarged drawing of part A in Fig. 1.
In figure: 1, slip ring, 2, centrifugal impeller, 3, rectangular saw-tooth.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As illustrated in fig. 1 and 2, a kind of centrifugal blower of impeller air inlet end band labyrinth seal structure, comprises slip ring 1 and centrifugal impeller 2; Slip ring 1 is in tubular, and its outlet side is stretched in the wheel cap of centrifugal impeller 2, and the ratio of the axial length stretched into and centrifugal impeller 2 external diameter can be the arbitrary value in 0.01 ~ 0.06; Rectangular saw-tooth sealing configuration is provided with inside centrifugal impeller 2 air inlet end; Rectangular saw-tooth sealing configuration comprises along centrifugal impeller axially equidistant multiple rectangular saw-tooth 3 of arranging, and the quantity of rectangular saw-tooth 3 can be the arbitrary value in 4 ~ 6; The axial spacing of adjacent two rectangular saw-tooth can in 5 ~ 10mm an optional value; The height of each sawtooth can be the arbitrary value in 5 ~ 10mm, and thickness can be the arbitrary value in 0.2 ~ 0.5 of height; Along centrifugal impeller air inlet end to direction, outlet side, the height of rectangular saw-tooth successively decreases; Each rectangular saw-tooth 3 can be the arbitrary value in 0.005 ~ 0.04 of centrifugal impeller 2 air inlet end internal diameter with the distance of slip ring 1 outer wall.
Comparatively wide arc gap is there is between the slip ring 1 of existing centrifugal blower and centrifugal impeller 2, air-flow easily produces backflow under the effect of centrifugal impeller 2 inlet outlet pressure differential, form whirlpool, and there is radial clearance with the air inlet end of centrifugal impeller 2 in slip ring 1, air-flow can leak at this radial clearance place, enlarging volume loses, and reduces the efficiency of ventilator, noise is raised.
The centrifugal blower of this impeller air inlet end band labyrinth seal structure adopts labyrinth seal structure (rectangular saw-tooth sealing configuration) at the gap location of slip ring and centrifugal impeller, effectively can reduce the radial clearance between slip ring 1 and centrifugal impeller 2 entrance.Gas enters centrifugal impeller 2 through slip ring 1, flows out under the turning effort of centrifugal impeller 2 from outlet.The pressure of inlet is much lower because impeller acting pressure raises for centrifugal impeller 2 outlet port gas, the gas in outlet port is caused again to flow through centrifugal impeller 2 by gap outside centrifugal impeller 2, because gap exists labyrinth seal structure, when gas is through each rectangular saw-tooth 3, air-flow is after gap enters toroidal cavity at a high speed, unexpected expansion and produce strong whirlpool, most of Conversion of Energy of air-flow is made to be that heat loses, enthalpy is made to return to the value before close to gap, fraction kinetic energy is only had still to enter next gap with leaving velocity, repeat said process step by step.At this moment gas pressure declines step by step, thus reaches the effect of sealing, improves the stability of inlet air flow, reduces the leakage rate of air-flow, reduces volumetric loss, thus improves the efficiency of ventilator, reduces noise.
Claims (1)
1. the centrifugal blower of an impeller air inlet end band labyrinth seal structure, comprise slip ring and centrifugal impeller, it is characterized in that: described slip ring is tubular, its outlet side is stretched in the wheel cap of centrifugal impeller, and the ratio of the axial length stretched into and centrifugal impeller external diameter is 0.01 ~ 0.06; Rectangular saw-tooth sealing configuration is provided with inside described centrifugal impeller air inlet end; Described rectangular saw-tooth sealing configuration comprises along centrifugal impeller axially equidistant 4 ~ 6 rectangular saw-tooth of arranging; The axial spacing of described adjacent two rectangular saw-tooth is 5 ~ 10mm; The height of each rectangular saw-tooth is 5 ~ 10mm, and thickness is 0.2 ~ 0.5 of height; Along centrifugal impeller air inlet end to direction, outlet side, the height of rectangular saw-tooth successively decreases; The distance of each rectangular saw-tooth and slip ring outer wall is 0.005 ~ 0.04 of centrifugal impeller air inlet end internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520247331.5U CN204610381U (en) | 2015-04-22 | 2015-04-22 | A kind of centrifugal blower of impeller air inlet end band labyrinth seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520247331.5U CN204610381U (en) | 2015-04-22 | 2015-04-22 | A kind of centrifugal blower of impeller air inlet end band labyrinth seal structure |
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| Publication Number | Publication Date |
|---|---|
| CN204610381U true CN204610381U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520247331.5U Expired - Fee Related CN204610381U (en) | 2015-04-22 | 2015-04-22 | A kind of centrifugal blower of impeller air inlet end band labyrinth seal structure |
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| CN (1) | CN204610381U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278221A (en) * | 2018-04-26 | 2018-07-13 | 重庆通用工业(集团)有限责任公司 | Inlet seal structure and wind turbine |
| CN109931291A (en) * | 2019-05-08 | 2019-06-25 | 泛仕达机电股份有限公司 | A kind of rotary collector |
| CN110805573A (en) * | 2019-12-12 | 2020-02-18 | 四川德胜集团钒钛有限公司 | Impeller assembly of centrifugal fan |
| WO2020211706A1 (en) * | 2019-04-16 | 2020-10-22 | Atlas Copco (Wuxi) Compressor Co., Ltd. | Guide device for directing gas through |
-
2015
- 2015-04-22 CN CN201520247331.5U patent/CN204610381U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278221A (en) * | 2018-04-26 | 2018-07-13 | 重庆通用工业(集团)有限责任公司 | Inlet seal structure and wind turbine |
| CN108278221B (en) * | 2018-04-26 | 2024-02-06 | 重庆通用工业(集团)有限责任公司 | Air inlet sealing structure and fan |
| WO2020211706A1 (en) * | 2019-04-16 | 2020-10-22 | Atlas Copco (Wuxi) Compressor Co., Ltd. | Guide device for directing gas through |
| US11761457B2 (en) | 2019-04-16 | 2023-09-19 | Atlas Copco (Wuxi) Compressor Co., Ltd. | Guide device for directing gas through a gas pressurizing device |
| CN109931291A (en) * | 2019-05-08 | 2019-06-25 | 泛仕达机电股份有限公司 | A kind of rotary collector |
| CN110805573A (en) * | 2019-12-12 | 2020-02-18 | 四川德胜集团钒钛有限公司 | Impeller assembly of centrifugal fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20160422 |
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| CF01 | Termination of patent right due to non-payment of annual fee |