CN104389819A - Upper cover of fan - Google Patents
Upper cover of fan Download PDFInfo
- Publication number
- CN104389819A CN104389819A CN201410714969.5A CN201410714969A CN104389819A CN 104389819 A CN104389819 A CN 104389819A CN 201410714969 A CN201410714969 A CN 201410714969A CN 104389819 A CN104389819 A CN 104389819A
- Authority
- CN
- China
- Prior art keywords
- boss
- cover body
- upper cover
- blower fan
- hole
- 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.)
- Granted
Links
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 an upper cover of a fan. The upper cover comprises a fan cover body, an air inlet is formed in the center of the fan cover body, a connector is arranged on the outer side of the fan cover body, an air incoming hole is formed in the connector, a first section of the air incoming hole is a round hole while a second section of the air incoming hole is a conical hole with diameter gradually increasing from outside to inside, the second section of the air incoming hole is communicated with the air inlet, and the edge of the air inlet forms an annular first boss towards the inner side of the fan cover body. The air incoming hole is composed of the round hole and the conical hole, so that when gas enters the fan through the air incoming hole and the air inlet, suction force exists, and effect of accelerating gas to enter is realized; after the gas enters, the first boss plays a role in guiding and limiting flowing direction of the gas, enables the gas to directly enters an impeller at the center of the fan and cooperates with a second boss to prevent the gas from willfully flowing and forming a vortex, so that air flow is stable, and efficiency of the fan is improved.
Description
Technical field
The present invention relates to gas conveying technology field, particularly a kind of good seal performance, constitutionally stable blower fan upper cover.
Background technique
Centrifugal blower is widely used in factory, mine, tunnel, cooling tower, vehicle, the ventilation of boats and ships and building, dust discharge and cooling, centrifugal fan is primarily of compositions such as casing, impeller, motors, traditional blower fan, the air inlet upper cover of its blower fan, because the problem of its structural design easily forms eddy current, gas stops in housing inside turn, working efficiency is not high, be unfavorable for the disposable circulation of air-flow, and sealability 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, the object of the present invention is to provide a kind of rational in infrastructure, make the stable blower fan upper cover of charge air flow.
For achieving the above object and other relevant objects, the invention provides a kind of blower fan upper cover, comprise cover body, described cover body central offers intake grill, and described cover body arranged outside has connecting head, and this connecting head offers intake opening, described intake opening first paragraph is circular hole, intake opening second segment is the cone shape hole that increases gradually of diameter from outside to inside, and this intake opening second segment communicates with intake grill, and described intake grill edge forms the first boss of a ring shape inside cover body.
Adopt said structure, because intake opening is made up of one section of circular hole and one section of cone shape hole, when this structure can make gas enter blower fan by intake opening and suction port, there is a kind of effect of suction, play the effect accelerated gas and enter, after gas enters, the first boss plays guiding and restriction gas flow, makes gas directly enter the impeller at blower fan center, prevent gas disorderly string, form eddy current, thus air-flow is steady, improves fan efficiency.
Described connecting head comprises the cylindrical portion and tapered portion that set gradually from outside to inside, and described tapered portion is connected with the outer side center of cover body, and the first paragraph of described intake opening is opened in cylindrical portion, and the second segment of described intake opening is opened in tapered portion.
Described connecting head comprises the cylindrical portion and tapered portion that set gradually from outside to inside, and described tapered portion is connected with the outer side center of cover body.
The inner side surface of described cover body is also provided with the second boss of a ring shape, and this second boss, near described cover outer rim, forms the impeller receiving groove of annular between described second boss and the first boss.
Said structure, when installing impeller, can insert in receiving groove by one end of impeller, on the one hand restriction air-flow disorderly string, the on the other hand rotating range of restriction impeller.
Described connecting head, 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 provided with multiple journal stirrup, and this journal stirrup offers attachment hole.
The size of described intake opening the inner is identical with the size of described intake grill.
As mentioned above, the invention has the beneficial effects as follows: because intake opening is made up of one section of circular hole and one section of cone shape hole, when this structure can make gas enter blower fan by intake opening and suction port, there is a kind of effect of suction, play the effect accelerated gas and enter, after gas enters, the first boss plays guiding and restriction gas flow, makes gas directly enter the impeller at blower fan center, coordinate with the second boss, prevent gas disorderly string formation 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 intake openings
12 first boss
13 second boss
14 intake grills
16 cylindrical portion
17 tapered portion
18 journal stirrups
19 attachment holes
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present invention and effect easily.
As shown in Figure 1 to Figure 2, the invention provides a kind of blower fan upper cover, comprise cover body, cover body 1 center offers intake grill 14, cover body 1 arranged outside has connecting head, connecting head comprises the cylindrical portion 16 and tapered portion 17 that set gradually from outside to inside, tapered portion 17 is connected with the outer side center of cover body 1, this connecting head offers intake opening 14, intake opening 14 first paragraph is be opened in the circular hole in cylindrical portion 16, intake opening 14 second segment is for being opened in tapered portion 17, the cone shape hole that increases gradually of diameter from outside to inside, this intake opening 14 second segment communicates with intake grill 14, the size of intake opening 14 the inner is identical with the size of intake grill 14.
Intake grill 14 edge forms the first boss 12 of a ring shape inside cover body 1, the inner side surface of cover body 1 is also provided with the second boss 13 of a ring shape, this second boss 13 is near cover outer rim, the impeller receiving groove of annular is formed between second boss 13 and the first boss 12, said structure, when installing impeller, can one end of impeller be inserted in receiving groove, restriction air-flow disorderly string on the one hand, the rotating range of restriction impeller on the other hand, the height of the first boss 12 is less than the height of the second boss 13, the thickness of the first boss 12 is less than the thickness of the second boss 13, connecting head, first boss 12 and the second boss 13 one-body molded with cover body 1, cover body 1 edge is circumferentially evenly provided with multiple journal stirrup 18, this journal stirrup 18 offers attachment hole 19, for connecting fan housing.
Above-described embodiment is the principle of illustrative invention and effect thereof only, but not for limiting the present invention, any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or change.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (7)
1. a blower fan upper cover, comprise cover body, described cover body central offers intake grill, it is characterized in that: described cover body arranged outside has connecting head, this connecting head offers intake opening, and described intake opening first paragraph is circular hole, and intake opening second segment is the cone shape hole that increases gradually of diameter from outside to inside, this intake opening second segment communicates with intake grill, and described intake grill edge forms the first boss of a ring shape inside cover body.
2. a kind of blower fan upper cover according to claim 1, it is characterized in that: described connecting head comprises the cylindrical portion and tapered portion that set gradually from outside to inside, described tapered portion is connected with the outer side center of cover body, the first paragraph of described intake opening is opened in cylindrical portion, and the second segment of described intake opening is opened in tapered portion.
3. a kind of blower fan upper cover according to claim 2, it is characterized in that: the inner side surface of described cover body is also provided with the second boss of a ring shape, this second boss, near described cover outer rim, forms the impeller receiving groove of annular between described second boss and the first boss.
4. a kind of blower fan upper cover according to claim 3, is characterized in that: described connecting head, the first boss and the second boss and described this body by integral forming of cover.
5. a kind of blower fan upper cover according to claim 4, is characterized in that: 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.
6. a kind of blower fan upper cover according to claim 1, is characterized in that: described cover body edges is circumferentially evenly provided with multiple journal stirrup, and this journal stirrup offers attachment hole.
7. a kind of blower fan upper cover according to claim 1, is characterized in that: the size of described intake opening the inner is identical with the size of described intake grill.
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 true CN104389819A (en) | 2015-03-04 |
| CN104389819B 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110945760A (en) * | 2017-07-17 | 2020-03-31 | 马勒国际有限公司 | Assembly with actuator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060051205A1 (en) * | 2004-09-03 | 2006-03-09 | Platz John A | Draft inducer blower |
| CN101321958A (en) * | 2005-12-09 | 2008-12-10 | 3M创新有限公司 | Portable blower system |
| KR20110070156A (en) * | 2009-12-18 | 2011-06-24 | 박찬성 | Centrifugal water pump |
| CN103154523A (en) * | 2010-09-29 | 2013-06-12 | 皮尔伯格有限责任公司 | Side channel blower, in particular a secondary air blower for an internal combustion machine |
| 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
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060051205A1 (en) * | 2004-09-03 | 2006-03-09 | Platz John A | Draft inducer blower |
| CN101321958A (en) * | 2005-12-09 | 2008-12-10 | 3M创新有限公司 | Portable blower system |
| KR20110070156A (en) * | 2009-12-18 | 2011-06-24 | 박찬성 | Centrifugal water pump |
| CN103154523A (en) * | 2010-09-29 | 2013-06-12 | 皮尔伯格有限责任公司 | Side channel blower, in particular a secondary air blower for an internal combustion machine |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 阮文渊: "如何正确设计离心风机的进风系统", 《节能》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110945760A (en) * | 2017-07-17 | 2020-03-31 | 马勒国际有限公司 | Assembly with actuator |
| CN110945760B (en) * | 2017-07-17 | 2022-02-08 | 马勒国际有限公司 | Assembly with actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104389819B (en) | 2017-01-04 |
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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 |