CN204476870U - A kind of centrifugal blower slip ring - Google Patents
A kind of centrifugal blower slip ring Download PDFInfo
- Publication number
- CN204476870U CN204476870U CN201520055351.2U CN201520055351U CN204476870U CN 204476870 U CN204476870 U CN 204476870U CN 201520055351 U CN201520055351 U CN 201520055351U CN 204476870 U CN204476870 U CN 204476870U
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- CN
- China
- Prior art keywords
- slip ring
- ring body
- impeller
- centrifugal blower
- outlet side
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Abstract
The utility model discloses a kind of centrifugal blower slip ring.Slip ring on existing centrifugal blower and the radial clearance between impeller eye are comparatively large, easily make air-flow leak, cause the volumetric loss of ventilator, cause fan efficiency to decline, and noise raises.The utility model comprises slip ring body; Slip ring body is tubular, and its inwall radius is successively decreased to direction, outlet side by inlet end; The outlet side of slip ring body is stretched in the wheel cap of impeller, and the ratio of the length stretched into and impeller average diameter is 0.01 ~ 0.06; The end, outlet side of slip ring body is provided with the baffle projection of annular; The radius of baffle projection and the difference of slip ring body outer side wall radius are 5 ~ 20mm.The utility model, by the optimal design to centrifugal blower slip ring, effectively can reduce the radial clearance between slip ring and impeller eye, improve the stability of air-flow, reduces the leakage rate of air-flow, reduces volumetric loss, raises the efficiency, and reduces noise.
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 slip ring.
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, 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 guide vane wheel level and smooth for gas, ensures impeller eye uniform stream, reaches the object improving impeller adiabatic efficiency.
Owing to there is gap between slip ring and impeller eye, flow back into the low voltage side of impeller inlet in spiral case near the high-pressure area air-flow of fan inlet side by this gap, make the rate of discharge of ventilator be less than inlet flow rate, cause the volumetric loss of blower fan.The value in this gap is comparatively large on the impact of aerodynamic performance when large discharge, and gap too senior general causes amount of leakage to increase, and loss increases.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, provides a kind of centrifugal blower slip ring, and this centrifugal blower slip ring can reduce the radial clearance between itself and impeller eye effectively, improves the stability of air-flow, reduces noise, raises the efficiency.
The utility model comprises slip ring body; Described slip ring body is tubular, and its inwall radius is successively decreased to direction, outlet side by inlet end; The outlet side of slip ring body is stretched in the wheel cap of impeller, and the ratio of the length stretched into and impeller average diameter is 0.01 ~ 0.06; The end, outlet side of slip ring body is provided with the baffle projection of annular; The radius of described baffle projection and the difference of slip ring body outer side wall radius are 5 ~ 20mm.
The beneficial effects of the utility model:
The utility model, by the optimal design to centrifugal blower slip ring, effectively can reduce the radial clearance between slip ring and impeller eye, improve the stability of air-flow, reduces the leakage rate of air-flow, reduces volumetric loss, raises the efficiency, and reduces noise.
Accompanying drawing explanation
Fig. 1 is working principle schematic diagram of the present utility model;
Fig. 2 is the partial enlarged drawing of part A in Fig. 1.
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 slip ring, comprises slip ring body 1; Slip ring body 1 is in tubular, and its inwall radius is successively decreased to direction, outlet side by inlet end; The outlet side of slip ring body 1 is stretched in the wheel cap of impeller 2, and the ratio of the length stretched into and impeller 2 average diameter can be the arbitrary value in 0.01 ~ 0.06; The end, outlet side of slip ring body 1 is provided with the baffle projection 4 of annular; The radius of baffle projection 4 and the difference of slip ring body 1 outer side wall radius are 5mm.
The slip ring of existing ventilator, between impeller 2 and spiral case 3, there is larger space, air-flow easily produces backflow herein, form whirlpool, and there is radial clearance between the entrance of slip ring and impeller 2, air-flow can leak at this radial clearance place, enlarging volume loses, and reduces the efficiency of ventilator, noise is raised.
This centrifugal blower slip ring is provided with the baffle projection 4 of annular in end, outlet side, effectively can reduce the radial clearance between slip ring body 1 and impeller 2 entrance.Gas enters impeller 2 through slip ring body 1, under the turning effort of impeller 2, enters spiral case 3.Because baffle protruding 4 stops that gas in spiral cases 3 enters in impeller 2 from slip ring body 1 and the gap of impeller 2, effectively can reduce slip ring body 1, whirlpool between impeller 2 and spiral case 3, improve the stability of air-flow, reduce the leakage rate of air-flow, reduce volumetric loss, thus improve the efficiency of ventilator, reduce noise.
Claims (1)
1. a centrifugal blower slip ring, comprises slip ring body, it is characterized in that: described slip ring body is tubular, and its inwall radius is successively decreased to direction, outlet side by inlet end; The outlet side of slip ring body is stretched in the wheel cap of impeller, and the ratio of the length stretched into and impeller average diameter is 0.01 ~ 0.06; The end, outlet side of slip ring body is provided with the baffle projection of annular; The radius of described baffle projection and the difference of slip ring body outer side wall radius are 5 ~ 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055351.2U CN204476870U (en) | 2015-01-27 | 2015-01-27 | A kind of centrifugal blower slip ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055351.2U CN204476870U (en) | 2015-01-27 | 2015-01-27 | A kind of centrifugal blower slip ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204476870U true CN204476870U (en) | 2015-07-15 |
Family
ID=53632662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520055351.2U Expired - Fee Related CN204476870U (en) | 2015-01-27 | 2015-01-27 | A kind of centrifugal blower slip ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204476870U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387003A (en) * | 2015-12-16 | 2016-03-09 | 珠海格力电器股份有限公司 | Fan flow guide device and centrifugal fan |
| CN107989831A (en) * | 2017-11-21 | 2018-05-04 | 重庆通用工业(集团)有限责任公司 | Wind turbine current collector design method and wind turbine |
| CN112824685A (en) * | 2019-11-21 | 2021-05-21 | 泛仕达机电股份有限公司 | Centrifugal impeller with efficiency improving device |
| CN114562716A (en) * | 2022-02-28 | 2022-05-31 | 江西南方锅炉股份有限公司 | Steam boiler system with air blowing mechanism |
-
2015
- 2015-01-27 CN CN201520055351.2U patent/CN204476870U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387003A (en) * | 2015-12-16 | 2016-03-09 | 珠海格力电器股份有限公司 | Fan flow guide device and centrifugal fan |
| CN105387003B (en) * | 2015-12-16 | 2018-11-02 | 珠海格力电器股份有限公司 | A kind of flow guide device of fan and centrifugal blower |
| CN107989831A (en) * | 2017-11-21 | 2018-05-04 | 重庆通用工业(集团)有限责任公司 | Wind turbine current collector design method and wind turbine |
| CN112824685A (en) * | 2019-11-21 | 2021-05-21 | 泛仕达机电股份有限公司 | Centrifugal impeller with efficiency improving device |
| CN112824685B (en) * | 2019-11-21 | 2022-08-09 | 泛仕达机电股份有限公司 | Centrifugal impeller with efficiency improving device |
| CN114562716A (en) * | 2022-02-28 | 2022-05-31 | 江西南方锅炉股份有限公司 | Steam boiler system with air blowing mechanism |
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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: 20150715 Termination date: 20160127 |
|
| EXPY | Termination of patent right or utility model |