CN104595218A - Draught fan - Google Patents
Draught fan Download PDFInfo
- Publication number
- CN104595218A CN104595218A CN201410715120.XA CN201410715120A CN104595218A CN 104595218 A CN104595218 A CN 104595218A CN 201410715120 A CN201410715120 A CN 201410715120A CN 104595218 A CN104595218 A CN 104595218A
- Authority
- CN
- China
- Prior art keywords
- boss
- blade
- blower fan
- impeller
- fan according
- 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
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
Abstract
The invention provides a draught fan which comprises a fan shell, a fan cover, a motor and an impeller assembly. The motor and the impeller assembly are installed on the fan shell. The impeller assembly comprises an annular support, a blade and a rear wheel disc which are arranged in sequence, the rear edge of the blade is connected with the rear wheel disc, the front edge of the blade is connected with the annular support, an impeller end cover is further installed on the front edge of the annular support or the blade, the impeller end cover covers the blade, and a vent hole corresponding to an air inlet in the fan cover is formed in the impeller end cover. The motor is installed on the outer wall of the fan shell, and a motor spindle stretches into the fan shell and is connected with the rear wheel disc. By means of the draught fan, the strength of the impeller assembly is improved, the stability in the running process is ensured, and vortex can be prevented from being formed through the sealing coordination of the impeller end cover, a first boss, a second boss, a third boss and the rear wheel disc, gas can pass through the draught fan at a time and does not remain, and the operating airflow is stable. Due to the good sealing effect, the gas does not leak, and the draught fan is suitable for flammable and explosive gas.
Description
Technical field
The present invention relates to gas conveying technology field, particularly a kind of good seal performance, constitutionally stable blower fan.
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, its impeller is usually centrifugal to be arranged on impeller hub disk, upper impeller is unsettled, easily be out of shape when rotating speed is higher, structural instability, and existing blower fan easily forms eddy current due to the problem of its structural design, gas stops in housing inside turn, working efficiency is not high, 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 stabilized structure, the stable blower fan of air-flow.
For achieving the above object and other relevant objects, the invention provides a kind of blower fan, comprise casing, cover and the motor be arranged on casing and impeller assembly, described impeller assembly comprises the ring support set gradually, blade and rear trochal disc, described blade rear edge is connected with rear trochal disc, blades leading edges is connected with ring support, this ring support or blades leading edges are also provided with impeller end cap, blade is stated in this impeller end housing residence, impeller end covers and offers vent hole corresponding to air port enterprising with cover, described motor is arranged on casing outer wall, electric machine main shaft stretches in casing and is connected with rear trochal disc.
Due to traditional impeller, its blade only has while fix with rear trochal disc, another side does not support, very unstable in the process of High Rotation Speed, easily distortion or damage, makes fan airflow unstable, air-supply weak effect, adopt said structure rear blade both sides to be connected on ring support and on rear trochal disc, enhance the overall structure of blade and impeller assembly, make it more stable when High Rotation Speed; After gas enters housing cavity from intake grill, directly enter impeller assembly through vent hole and be then sent to exhaust outlet on casing, do not spiral in all the other places of casing, prevent the formation of eddy current, gas is disposable by blower fan, without stopping gas, make air-flow steady, blower fan working efficiency is high.
Described bottom of shell is provided with the first boss of annular, fits in the rear surface of this first boss and described rear trochal disc.
By the first boss and rear trochal disc rear surface gluing, sealing, prevent gas from leaking from the position within the scope of boss, strengthen sealing effect.
Each described blade is all connected with ring support, and described blades leading edges is also provided with locating column, and described impeller end covers and offers the mounting hole corresponding with described locating column.This structure is convenient to install between impeller end cap and blade and is fixed.
Described impeller end covers and also offers many grooves adapted with described blades leading edges, and described mounting hole offers this bottom portion of groove, and described blades leading edges and locating column coordinate with groove and mounting hole respectively.Blade stretches in groove and is connected and fixed more firm with impeller end cap.
Described intake grill is the cone shape hole that increases gradually of diameter from outside to inside, and the diameter of described vent hole is greater than the diameter of intake grill the inner.
This structure can make the gas entered from intake grill diffuse to impeller assembly gradually, and air-flow is more steady.
The inner end edge of described intake grill forms circle second boss, and this second boss stretches in described vent hole, and fits with vent hole inwall.This structure can make gas by directly entering impeller assembly after intake grill, plays the effect of water conservancy diversion, and sealing good airproof performance.
Described cover is provided with a circle the 3rd boss, the 3rd boss diameter is greater than described second boss diameter, and described impeller assembly is anterior between the second boss and the 3rd boss.
Described ring support and blade and rear trochal disc one-body molded, one-body molded intensity is higher.
Described bottom of shell outer wall arranges installation sleeve, and described motor is positioned at this installation sleeve.
As mentioned above, the invention has the beneficial effects as follows: this blower fan, impeller assembly intensity is improved, ensure that the stability in operation process, and being sealed and matched by impeller end cap, the first boss, the second boss, the 3rd boss and rear trochal disc, make to prevent to form eddy current, make that gas is disposable passes through blower fan, without stopping gas, running air-flow is steady; Because good sealing effect does not leak, be thus applicable to flammable explosive gas.
Accompanying drawing explanation
Fig. 1 is the explosive view of the embodiment of the present invention;
Fig. 2 is the structural representation of embodiment of the present invention impeller assembly;
Fig. 3 is the structural representation of embodiment of the present invention impeller end cap;
Fig. 4 is the structural representation of embodiment of the present invention cover;
Fig. 5 is the sectional view of Fig. 4;
Fig. 6 is the structural representation of embodiment of the present invention casing;
Fig. 7 is the sectional view of Fig. 6.
Piece mark explanation
1 cover
11 intake grills
12 second boss
13 the 3rd boss
21 rear trochal discs
22 ring supports
23 blades
24 locating columns
25 connecting sleeves
3 impeller end caps
31 vent holes
32 mounting holes
33 grooves
4 casings
41 first boss
42 installation sleeves
5 motors
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 Figures 1 to 7, the invention provides a kind of blower fan, comprise casing 4, impeller assembly and impeller end cap 3 are installed in casing 4, cover 1 sealing is arranged on casing 4, casing 4 bottom outer wall arranges installation sleeve 42, is provided with motor 5 in installation sleeve 42, the main shaft of motor 5 stretches into casing 4 inner chamber and is connected with impeller assembly.
As illustrated in fig. 1 and 2, impeller assembly comprises the ring support 22, blade 23 and the rear trochal disc 21 that set gradually, blade 23 rear edge is fixedly connected with rear trochal disc 21, blade 23 front edge is connected with ring support 22, blade 23 front edge is also provided with impeller end cap 3, this impeller end cap 3 covers blade 23, impeller end cap 3 outer rim coordinates with ring support 22 inner ring, impeller end cap 3 offers the vent hole 31 corresponding with the enterprising air port of cover 1 11, motor 5 main shaft stretches in casing 4 and is connected with the connecting sleeve 25 on rear trochal disc 21.
As shown in Figure 6 and Figure 7, be provided with the first boss 41 of annular bottom casing 4, this first boss 41 is fitted with the rear surface of rear trochal disc 21, by the first boss 41 and rear trochal disc 21 rear surface gluing, sealing, prevent gas from leaking from the position in the first boss 41 scope, strengthen sealing effect.
As shown in Figures 2 and 3, each blade 23 is all connected with ring support 22, blade 23 front edge is also provided with locating column 24, impeller end cap 3 offers the mounting hole 32 corresponding with locating column 24, this structure is convenient to install and is fixed, ring support 22 and blade 23 and rear trochal disc 21 one-body molded, one-body molded intensity is higher; Impeller end cap 3 also offers many grooves 33 adapted with blade 23 front edge, mounting hole 32 is offered bottom this groove 33, and blade 23 front edge and locating column 24 coordinate with groove 33 and mounting hole 32 respectively.Blade 23 stretches in groove 33 and is connected and fixed more firm with impeller end cap 3.
Intake grill 11 is the cone shape hole that increases gradually of diameter from outside to inside as shown in Figure 4 and Figure 5, the diameter of vent hole 31 is greater than the diameter of intake grill 11 the inner, the inner end edge of intake grill 11 forms circle second boss 12, this second boss 12 stretches in vent hole 31, and fit with vent hole 31 inwall, this structure can make gas by directly entering impeller assembly after intake grill 11, play the effect of water conservancy diversion, and sealing good airproof performance, cover 1 is provided with a circle the 3rd boss 13, 3rd boss 13 diameter is greater than the second boss 12 diameter, impeller assembly is anterior between the second boss 12 and the 3rd boss 13.
Due to traditional impeller, its blade 23 only has while fix with rear trochal disc 21, another side does not support, very unstable in the process of High Rotation Speed, easily distortion or damage, makes fan airflow unstable, air-supply weak effect, adopt said structure rear blade 23 both sides to be connected on ring support 22 and on rear trochal disc 21, enhance the overall structure of blade 23 and impeller assembly, make it more stable when High Rotation Speed; After gas enters housing cavity from intake grill 11, directly enter impeller assembly through vent hole 31 and be then sent to exhaust outlet on casing 4, do not spiral in all the other places of casing 4, prevent the formation of eddy current, gas is disposable by blower fan, without stopping gas, make air-flow steady, blower fan working efficiency is high, because good sealing effect does not leak, is thus applicable to flammable explosive gas.
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 (9)
1. a blower fan, comprise casing, cover and the motor be arranged on casing and impeller assembly, it is characterized in that: described impeller assembly comprises the ring support, blade and the rear trochal disc that set gradually, described blade rear edge is connected with rear trochal disc, blades leading edges is connected with ring support, this ring support or blades leading edges are also provided with impeller end cap, blade is stated in this impeller end housing residence, impeller end covers and offers vent hole corresponding to air port enterprising with cover, described motor is arranged on casing outer wall, and electric machine main shaft stretches in casing and is connected with rear trochal disc.
2. a kind of blower fan according to claim 1, is characterized in that: described bottom of shell is provided with the first boss of annular, fits in the rear surface of this first boss and described rear trochal disc.
3. a kind of blower fan according to claim 1, is characterized in that: each described blade is all connected with ring support, and described blades leading edges is also provided with locating column, and described impeller end covers and offers the mounting hole corresponding with described locating column.
4. a kind of blower fan according to claim 3, it is characterized in that: described impeller end covers and also offers many grooves adapted with described blades leading edges, described mounting hole offers this bottom portion of groove, and described blades leading edges and locating column coordinate with groove and mounting hole respectively.
5. a kind of blower fan according to claim 1, is characterized in that: described intake grill is the cone shape hole that increases gradually of diameter from outside to inside, and the diameter of described vent hole is greater than the diameter of intake grill the inner.
6. a kind of blower fan according to claim 1, is characterized in that: the inner end edge of described intake grill forms circle second boss, and this second boss stretches in described vent hole, and fits with vent hole inwall.
7. a kind of blower fan according to claim 6, is characterized in that: described cover is provided with a circle the 3rd boss, and the 3rd boss diameter is greater than described second boss diameter, and described impeller assembly is anterior between the second boss and the 3rd boss.
8. a kind of blower fan according to claim 1, is characterized in that: described ring support and blade and rear trochal disc one-body molded.
9. a kind of blower fan according to claim 1, is characterized in that: described bottom of shell outer wall arranges installation sleeve, and described motor is positioned at this installation sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410715120.XA CN104595218B (en) | 2014-12-01 | 2014-12-01 | Draught fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410715120.XA CN104595218B (en) | 2014-12-01 | 2014-12-01 | Draught fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104595218A true CN104595218A (en) | 2015-05-06 |
| CN104595218B CN104595218B (en) | 2017-04-19 |
Family
ID=53121192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410715120.XA Active CN104595218B (en) | 2014-12-01 | 2014-12-01 | Draught fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104595218B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114342A (en) * | 2015-09-11 | 2015-12-02 | 珠海格力电器股份有限公司 | Volute fan |
| CN110360153A (en) * | 2019-06-23 | 2019-10-22 | 北京交通大学 | A kind of tunnel ventilation blower |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1171961A (en) * | 1966-02-24 | 1969-11-26 | Smiths Industries Ltd | Improvements in or relating to Centrifugal Fans |
| EP1455094A1 (en) * | 2003-03-04 | 2004-09-08 | Ziehl-Abegg AG | Radial flow impeller |
| CN101290015A (en) * | 2008-05-16 | 2008-10-22 | 宜兴市陈记玻璃钢风机有限公司 | Centrifugal blower fan blade wheel structure |
| CN102562658A (en) * | 2012-03-27 | 2012-07-11 | 海信容声(广东)冰箱有限公司 | Centrifugal fan impeller for air cooling refrigerator |
| CN103244455A (en) * | 2012-02-09 | 2013-08-14 | 三星电机株式会社 | Impeller for electric blower and apparatus for manufacturing the same |
| CN204283936U (en) * | 2014-12-01 | 2015-04-22 | 重庆德固科技有限公司 | A kind of blower fan |
-
2014
- 2014-12-01 CN CN201410715120.XA patent/CN104595218B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1171961A (en) * | 1966-02-24 | 1969-11-26 | Smiths Industries Ltd | Improvements in or relating to Centrifugal Fans |
| EP1455094A1 (en) * | 2003-03-04 | 2004-09-08 | Ziehl-Abegg AG | Radial flow impeller |
| CN101290015A (en) * | 2008-05-16 | 2008-10-22 | 宜兴市陈记玻璃钢风机有限公司 | Centrifugal blower fan blade wheel structure |
| CN103244455A (en) * | 2012-02-09 | 2013-08-14 | 三星电机株式会社 | Impeller for electric blower and apparatus for manufacturing the same |
| CN102562658A (en) * | 2012-03-27 | 2012-07-11 | 海信容声(广东)冰箱有限公司 | Centrifugal fan impeller for air cooling refrigerator |
| CN204283936U (en) * | 2014-12-01 | 2015-04-22 | 重庆德固科技有限公司 | A kind of blower fan |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114342A (en) * | 2015-09-11 | 2015-12-02 | 珠海格力电器股份有限公司 | Volute fan |
| CN105114342B (en) * | 2015-09-11 | 2018-11-02 | 珠海格力电器股份有限公司 | A kind of spiral case wind turbine |
| CN110360153A (en) * | 2019-06-23 | 2019-10-22 | 北京交通大学 | A kind of tunnel ventilation blower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104595218B (en) | 2017-04-19 |
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