CN204299959U - A kind of blower fan upper cover - Google Patents
A kind of blower fan upper cover Download PDFInfo
- Publication number
- CN204299959U CN204299959U CN201420740962.6U CN201420740962U CN204299959U CN 204299959 U CN204299959 U CN 204299959U CN 201420740962 U CN201420740962 U CN 201420740962U CN 204299959 U CN204299959 U CN 204299959U
- Authority
- CN
- China
- Prior art keywords
- boss
- intake opening
- blower fan
- cover body
- upper cover
- 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.)
- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a kind of blower fan upper cover, comprise cover body, described cover body central offers intake grill, 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.The utility model is made up of one section of circular hole and one section of cone shape hole due to intake opening, 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, first boss plays guiding and restriction gas flow, make 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.
Description
Technical field
The utility model 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.
Model utility content
The deficiencies in the prior art in view of the above, the purpose of this utility model is to provide a kind of rational in infrastructure, makes the stable blower fan upper cover of charge air flow.
For achieving the above object and other relevant objects, the utility model 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 beneficial effects of the utility model are: 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 utility model embodiment;
Fig. 2 is the sectional view of the utility model embodiment.
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, mode of execution of the present utility model is described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present utility model and effect easily.
As shown in Figure 1 to Figure 2, the utility model 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 model utility and effect thereof only, but not for limiting the utility model, any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or change.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
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 |
|---|---|---|---|
| CN201420740962.6U CN204299959U (en) | 2014-12-01 | 2014-12-01 | A kind of blower fan upper cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420740962.6U CN204299959U (en) | 2014-12-01 | 2014-12-01 | A kind of blower fan upper cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204299959U true CN204299959U (en) | 2015-04-29 |
Family
ID=53105503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420740962.6U Expired - Fee Related CN204299959U (en) | 2014-12-01 | 2014-12-01 | A kind of blower fan upper cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204299959U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389819A (en) * | 2014-12-01 | 2015-03-04 | 重庆德固科技有限公司 | Upper cover of fan |
-
2014
- 2014-12-01 CN CN201420740962.6U patent/CN204299959U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389819A (en) * | 2014-12-01 | 2015-03-04 | 重庆德固科技有限公司 | Upper cover of 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: 20150429 Termination date: 20151201 |
|
| EXPY | Termination of patent right or utility model |