CN104389819B - Fan upper cover - Google Patents
Fan upper cover Download PDFInfo
- Publication number
- CN104389819B CN104389819B CN201410714969.5A CN201410714969A CN104389819B CN 104389819 B CN104389819 B CN 104389819B CN 201410714969 A CN201410714969 A CN 201410714969A CN 104389819 B CN104389819 B CN 104389819B
- Authority
- CN
- China
- Prior art keywords
- air inlet
- boss
- cover body
- fresh air
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006396 nitration reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a fan upper cover which comprises a cover body, wherein an air inlet is formed in the center of the cover body, a connector is arranged on the outer side of the cover body, an air inlet hole is formed in the connector, the first section of the air inlet hole is a circular hole, the second section of the air inlet hole is a conical hole with the diameter gradually increasing from the outside to the inside, the second section of the air inlet hole is communicated with the air inlet, and a ring-shaped first boss is formed at the edge of the air inlet towards the inner side of the cover body. The air inlet hole is composed of a section of round hole and a section of conical hole, so that when air enters the fan through the air inlet hole and the air inlet, a suction effect is achieved, the effect of accelerating the entry of the air is achieved, after the air enters, the first boss plays a role in guiding and limiting the flow direction of the air, the air directly enters the impeller in the center of the fan and is matched with the second boss, the air is prevented from being mixed to form vortex, the air flow is stable, and the efficiency of the fan is improved.
Description
Technical field
The present invention relates to gas conveying technology field, particularly to a kind of good seal performance, constitutionally stable blower fan upper cover.
Background technology
Centrifugal blower is widely used in the ventilation of factory, mine, tunnel, cooling tower, vehicle, boats and ships and building, dust discharge and cold
But, centrifugal fan is mainly made up of casing, impeller, motor etc., and traditional blower fan, the air inlet upper cover of its blower fan, due to it
The problem of structure design easily forms eddy current, and gas stops in housing inside turn, and work efficiency is the highest, is unfavorable for that air-flow is once
Property circulation, and sealing property is poor, is not suitable for the conveying of flammable explosive gas.
Summary of the invention
The deficiencies in the prior art in view of the above, it is an object of the invention to provide a kind of rational in infrastructure, make charge air flow steady
Blower fan upper cover.
For achieving the above object and other relevant purposes, the present invention provides a kind of blower fan upper cover, including cover body, described cover
Body central offers air inlet, and described cover outer body is provided with union joint, and this union joint offers fresh air inlet, described
Fresh air inlet first paragraph is circular hole, and fresh air inlet second segment is the bellmouth that diameter is gradually increased from outside to inside, this fresh air inlet second segment with
Air inlet communicates, and described air inlet edge forms the first boss of a ring shape inside cover body.
Using said structure, owing to fresh air inlet is made up of one section of circular hole and one section of bellmouth, this structure can pass the gas through air intake
When hole and air inlet enter blower fan, there is the effect of a kind of suction, play and accelerate the effect that gas enters, after gas enters, the
One boss acts the effect guiding and limiting gas flow, makes gas be directly entered the impeller at blower fan center, prevents gas disorderly string, shape
Become eddy current, thus air-flow is steady, improves fan efficiency.
Described union joint includes in the outside of cylindrical portion and the tapered portion set gradually from outside to inside, described tapered portion and cover body
The heart connects, and the first paragraph of described fresh air inlet is opened in cylindrical portion, and the second segment of described fresh air inlet is opened in tapered portion.
Described union joint includes in the outside of cylindrical portion and the tapered portion set gradually from outside to inside, described tapered portion and cover body
The heart connects.
The medial surface of described cover body is additionally provided with the second boss of a ring shape, and this second boss is the most external near described cover
Edge, forms the impeller holding tank of annular between described second boss and the first boss.
Said structure, when installing impeller, can insert in holding tank by one end of impeller, on the one hand limits air-flow disorderly string, separately
On the one hand the rotating range of impeller is limited.
Described union joint, the first boss and the second boss and described this body by integral forming of cover.
The height of described first boss is less than the height of the second boss, and the thickness of described first boss is less than the thickness of the second boss.
Described cover body edges is circumferentially evenly arranged with multiple journal stirrup, and this journal stirrup offers connecting hole.
The size of described fresh air inlet the inner is identical with the size of described air inlet.
As it has been described above, the invention has the beneficial effects as follows: owing to fresh air inlet is made up of one section of circular hole and one section of bellmouth, this structure can
During to pass the gas through fresh air inlet and air inlet entrance blower fan, there is the effect of a kind of suction, play and accelerate the effect that gas enters,
After gas enters, the first boss acts the effect guiding and limiting gas flow, makes gas be directly entered the impeller at blower fan center, with
Second boss coordinates, and prevents gas disorderly string from forming eddy current, thus air-flow is steady, improves fan efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the sectional view of the embodiment of the present invention.
Piece mark explanation
1 cover body
11 fresh air inlets
12 first boss
13 second boss
14 air inlets
16 cylindrical portion
17 tapered portion
18 journal stirrups
19 connecting holes
Detailed description of the invention
By particular specific embodiment, embodiments of the present invention being described below, those skilled in the art can be taken off by this specification
The content of dew understands other advantages and effect of the present invention easily.
As shown in Figure 1 to Figure 2, the present invention provides a kind of blower fan upper cover, and including cover body, cover body 1 center offers
Air inlet 14, is provided with union joint outside cover body 1, union joint includes cylindrical portion 16 and the cone set gradually from outside to inside
Shape portion 17, tapered portion 17 is connected with the outer side center of cover body 1, and this union joint offers fresh air inlet 14, fresh air inlet 14
First paragraph is the circular hole being opened in cylindrical portion 16, fresh air inlet 14 second segment for being opened in tapered portion 17, diameter from outside to inside
The bellmouth being gradually increased, this fresh air inlet 14 second segment communicates with air inlet 14, the size of fresh air inlet 14 the inner and air inlet
The size of 14 is identical.
Air inlet 14 edge forms the first boss 12 of a ring shape inside cover body 1, and the medial surface of cover body 1 also sets
Being equipped with the second boss 13 of a ring shape, this second boss 13 is near cover body 1 outer rim, the second boss 13 and the first boss
Form the impeller holding tank of annular, said structure between 12, when installing impeller, can one end of impeller be inserted in holding tank,
On the one hand limiting air-flow disorderly string, on the other hand limit the rotating range of impeller, the height of the first boss 12 is less than the second boss 13
Height, the thickness of the first boss 12 is less than the thickness of the second boss 13, union joint, the first boss 12 and the second boss 13
One-body molded with cover body 1, cover body 1 edge is circumferentially evenly arranged with multiple journal stirrup 18, and this journal stirrup 18 is offered
There is connecting hole 19, for connecting fan housing.
The principle of above-described embodiment only illustrative invention and effect thereof, not for limiting the present invention, any be familiar with this technology
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by personage.Therefore, belonging to such as
Technical field has all equivalences that usually intellectual completed under without departing from disclosed spirit and technological thought repair
Decorations or change, must be contained by the claim of the present invention.
Claims (4)
1. a blower fan upper cover, including cover body, described cover body central offers air inlet, it is characterised in that: described cover
Outer body is provided with union joint, and this union joint offers fresh air inlet, and described fresh air inlet first paragraph is circular hole, fresh air inlet
Two-stage nitration is the bellmouth that diameter is gradually increased from outside to inside, and this fresh air inlet second segment communicates with air inlet, described air inlet edge
The first boss of a ring shape is formed inside cover body；Described union joint include the cylindrical portion that sets gradually from outside to inside and
Tapered portion, described tapered portion is connected with the outer side center of cover body, and the first paragraph of described fresh air inlet is opened in cylindrical portion,
The second segment of described fresh air inlet is opened in tapered portion；It is second convex that the medial surface of described cover body is additionally provided with a ring shape
Platform, this second boss holds near described cover body outer rim, the impeller forming annular between described second boss and the first boss
Receive groove；Described cover body edges is circumferentially evenly arranged with multiple journal stirrup, and this journal stirrup offers connecting hole.
A kind of blower fan upper cover the most according to claim 1, it is characterised in that: described union joint, the first boss and the second boss with
Described this body by integral forming of cover.
A kind of blower fan upper cover the most according to claim 2, it is characterised in that: the height of described first boss is less than the second boss
Highly, the thickness of described first boss is less than the thickness of the second boss.
A kind of blower fan upper cover the most according to claim 1, it is characterised in that: the size of described fresh air inlet the inner and described air inlet
Size identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410714969.5A CN104389819B (en) | 2014-12-01 | 2014-12-01 | Fan upper cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410714969.5A CN104389819B (en) | 2014-12-01 | 2014-12-01 | Fan upper cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104389819A CN104389819A (en) | 2015-03-04 |
| CN104389819B true CN104389819B (en) | 2017-01-04 |
Family
ID=52607765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410714969.5A Active CN104389819B (en) | 2014-12-01 | 2014-12-01 | Fan upper cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104389819B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017212213B4 (en) * | 2017-07-17 | 2020-08-13 | Mahle International Gmbh | Assembly with an actuator for an exhaust gas turbocharger or an air management system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7278823B2 (en) * | 2004-09-03 | 2007-10-09 | Fasco Industries, Inc. | Draft inducer blower |
| US7748381B2 (en) * | 2005-12-09 | 2010-07-06 | 3M Innovative Properties Company | Portable blower system |
| KR101204099B1 (en) * | 2009-12-18 | 2012-12-12 | 대한민국 | Centrifugal Water Pump |
| DE102010046870B4 (en) * | 2010-09-29 | 2016-09-22 | Pierburg Gmbh | Side channel blower, in particular secondary air blower for an internal combustion engine |
| CN204299959U (en) * | 2014-12-01 | 2015-04-29 | 重庆德固科技有限公司 | A kind of blower fan upper cover |
-
2014
- 2014-12-01 CN CN201410714969.5A patent/CN104389819B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104389819A (en) | 2015-03-04 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |