CN206338243U - A kind of improved centrifugal high pressure fan for reducing air quantity leakage - Google Patents
A kind of improved centrifugal high pressure fan for reducing air quantity leakage Download PDFInfo
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- CN206338243U CN206338243U CN201621434315.8U CN201621434315U CN206338243U CN 206338243 U CN206338243 U CN 206338243U CN 201621434315 U CN201621434315 U CN 201621434315U CN 206338243 U CN206338243 U CN 206338243U
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- impeller
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- spiral case
- main shaft
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Abstract
The utility model is related to a kind of improved centrifugal high pressure fan for reducing air quantity leakage.The utility model includes spiral case, main impeller and the main shaft being connected with main impeller, the accessory impeller for closing on spiral case arrangement is installed on the main shaft axle journal between the main impeller back side and spiral case, accessory impeller includes the impeller chassis rotated with the main shaft and multiple back blades, back blades is located at side of the impeller chassis away from main impeller, and impeller chassis is constituted by being split as two-part half disk assembly.Blower fan main impeller can be dissipated excessive kinetic energy in operation and change into pressure energy again by accessory impeller, reduce fan outlet higher-pressure region and the pressure difference of main impeller rear low-pressure area, the state that builds the pressure is in even in fan outlet, air quantity in spiral case can be also prevented effectively from and reveal, improve fan operation efficiency.In addition, impeller chassis is half dish structure split, realize with tearing open with dress, and can also be directly welded above main shaft axle journal, it is not necessary to do any change to volute of blower, it is reliability, practical.
Description
Technical field
The utility model is related to centrifugal high pressure fan field, is specifically related to a kind of improved height for reducing air quantity leakage
Press centrifugal blower.
Background technology
Patent CN205243937U discloses a kind of centrifugal high pressure fan, and the centrifugal high pressure fan is by impeller, spiral case, main shaft
Deng part composition, air inlet is provided with the middle of spiral case front end, spiral case side is provided with gas outlet, and main shaft is entered by spiral case rear end center section
Enter and be connected with impeller.The multiple fins of disk increase after the impeller are mentioned in the patent can effectively reduce air quantity leakage, but
It is that, when actual impeller works, air quantity still has external leakage loss in spiral case, particularly when fan outlet builds the pressure
When, the clearance leakage between blower fan main shaft and spiral case steams can be very serious, causes site environment to pollute.
The content of the invention
In order to solve the above technical problems, the utility model provides a kind of improved centrifugal high pressure for reducing air quantity leakage
Blower fan, the centrifugal high pressure fan make it that air quantity external leakage loss further reduces, and when fan outlet builds the pressure, can also play
The effect for preventing air quantity from leaking well, substantially increases the operational efficiency of blower fan.
To achieve the above object, the utility model employs following technical scheme：
It is a kind of it is improved reduce air quantity leakage centrifugal high pressure fan, including spiral case, main impeller and with the main lobe
Take turns the accessory lobes for being provided with the main shaft of drive connection, the main shaft axle journal between the main impeller back side and spiral case and closing on spiral case arrangement
Wheel, the accessory impeller includes the impeller chassis that is rotated with the main shaft and multiple is fixed on impeller chassis and along impeller
The radially-arranged back blades in chassis, the back blades is located at the side of the impeller chassis away from the main impeller, the impeller
Chassis is constituted by being split as two-part half disk assembly.
Further, the impeller chassis is led to by the back blades bonded to each other that edge arrangement is split positioned at two and half disks
Cross bolt connection and realize assembly.
Further, the accessory lobes leaf length is the 1/2 of the major axis diameter, and the back blades width is major axis diameter
1/4。
Further, the quantity of the back blades is 6~8.
The beneficial effect of above-mentioned technical proposal is mainly reflected in the following aspects：
(1) the utility model can be dissipated blower fan main impeller in operation by setting accessory impeller on main shaft axle journal
Excessive kinetic energy changes into pressure energy again, reduces main impeller rear low-pressure area and the pressure difference of higher-pressure region at fan outlet, prevents
Gas enters main impeller rear, thus further can effectively reduce the leakage of gas gap location between blower fan main shaft and spiral case
Amount, the state built the pressure is in even in fan outlet, can also be reached the purpose for being prevented effectively from that air quantity is revealed in spiral case, be improved
Fan operation efficiency, improved structure of the present utility model is simple, invest small.In addition, being fractionation by the impeller chassis design
Half dish structure, it is convenient to install, realize with tearing open with dress, and can also be directly welded above main shaft axle journal, it is not necessary to volute of blower
Do any change, it is reliability, practical.
(2) when mounted, two and half disks are spliced for the accessory impeller so that the accessory lobes of edge are split positioned at two and half disks
Piece is bonded to each other, reuses bolt and fastens back blades bonded to each other, that is, constitutes the accessory impeller after complete installation.It is described
Accessory impeller is simple in construction, is easily installed, dismantles.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the right view of accessory impeller in Fig. 1.
Fig. 3 is the left view of accessory impeller in Fig. 2.
The implication of label symbol is as follows in figure：
The disk 12- back blades 13- bolts of 1- accessory impeller 11- impellers chassis 11a- half
14- anchor ear 2- spiral case 21- air inlet 22- air outlet 3- main impeller 4- main shafts
Embodiment
In conjunction with brief description of the drawings design feature of the present utility model：
As shown in Figure 1, 2, 3, the utility model is connected including spiral case 2, main impeller 3 and with the main impeller 3
The accessory impeller 1 for closing on the arrangement of spiral case 2, institute are installed on main shaft 4, the axle journal of main shaft 4 between the back side of main impeller 3 and spiral case 3
Stating accessory impeller 1 includes the impeller chassis 11 that is rotated with the main shaft 4 and multiple is fixed on impeller chassis 11 and along leaf
The radially-arranged back blades 12 in chassis is taken turns, the back blades 12 is located at side of the impeller chassis 11 away from the main impeller 3,
The impeller chassis 11 is constituted by being split as two-part half disk 11a assembly.
The length of back blades 12 is the 1/2 of the major axis diameter, and the width of back blades 12 is the 1/4 of major axis diameter.
The quantity of the back blades 12 is 6~8.
The utility model can be dissipated blower fan main impeller 3 in operation by setting accessory impeller 1 on the axle journal of main shaft 4
Excessive kinetic energy changes into pressure energy again, reduces the rear low-pressure area of main impeller 3 and the pressure difference of higher-pressure region at fan outlet 22, resistance
Only gas enters the rear of main impeller 3, thus further can effectively reduce gas gap location between blower fan main shaft 4 and spiral case 2
Leakage rate, be in the state that builds the pressure even in fan outlet 22, can also reach the mesh for being prevented effectively from that air quantity is revealed in spiral case 2
, fan operation efficiency is improved, improved structure of the present utility model is simple, invest small.In addition, the impeller chassis 11 is set
The half disk 11a structure split is calculated as, it is convenient to install, realize with tearing open with dress, and can also be directly welded above the axle journal of main shaft 4,
It need not do any change to volute of blower 2, it is reliability, practical.
The impeller chassis 11 is passed through by the back blades 12 bonded to each other that edge arrangement is split positioned at two and half disk 11a
The connection of bolt 13 is realized assembled.I.e. described accessory impeller 1 when mounted, two and half disk 11a is spliced so that positioned at two and half disks
The back blades 12 that 11a splits edge is bonded to each other, reuses bolt 13 and fastens back blades 12 bonded to each other, that is, constitutes
Accessory impeller 1 after complete installation.The accessory impeller 1 is simple in construction, is easily installed, dismantles.
Claims (4)
1. it is a kind of it is improved reduce air quantity leakage centrifugal high pressure fan, including spiral case (2), main impeller (3) and with it is described
The main shaft (4) of main impeller (3) drive connection, it is characterised in that：Main shaft (4) between main impeller (3) back side and spiral case (2)
The accessory impeller (1) for closing on spiral case (2) arrangement is installed, the accessory impeller (1) includes rotating with the main shaft (4) on axle journal
Impeller chassis (11) and multiple be fixed on impeller chassis (11) and along the radially-arranged back blades in impeller chassis (12), institute
Back blades (12) is stated positioned at side of the impeller chassis (11) away from the main impeller (3), the impeller chassis (11) is by tearing open
It is divided into two-part half disk (11a) assembly to constitute.
2. centrifugal high pressure fan as claimed in claim 1, it is characterised in that：The impeller chassis (11) is by positioned at two and half disks
The back blades (12) bonded to each other that (11a) splits edge arrangement realizes assembly by bolt (13) connection.
3. centrifugal high pressure fan as claimed in claim 1, it is characterised in that：Back blades (12) length is that the main shaft is straight
The 1/2 of footpath, back blades (12) width is the 1/4 of major axis diameter.
4. centrifugal high pressure fan as claimed in claim 1, it is characterised in that：The quantity of the back blades (12) is 6~8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621434315.8U CN206338243U (en) | 2016-12-23 | 2016-12-23 | A kind of improved centrifugal high pressure fan for reducing air quantity leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621434315.8U CN206338243U (en) | 2016-12-23 | 2016-12-23 | A kind of improved centrifugal high pressure fan for reducing air quantity leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206338243U true CN206338243U (en) | 2017-07-18 |
Family
ID=59301558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621434315.8U Active CN206338243U (en) | 2016-12-23 | 2016-12-23 | A kind of improved centrifugal high pressure fan for reducing air quantity leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206338243U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762817A (en) * | 2016-12-23 | 2017-05-31 | 安徽六国化工股份有限公司 | A kind of improved centrifugal high pressure fan for reducing air quantity leakage |
| CN107524620A (en) * | 2017-09-25 | 2017-12-29 | 张家港保税区创典炉窑通风设备有限公司 | A kind of centrifugal hot air circulation blower |
-
2016
- 2016-12-23 CN CN201621434315.8U patent/CN206338243U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762817A (en) * | 2016-12-23 | 2017-05-31 | 安徽六国化工股份有限公司 | A kind of improved centrifugal high pressure fan for reducing air quantity leakage |
| CN107524620A (en) * | 2017-09-25 | 2017-12-29 | 张家港保税区创典炉窑通风设备有限公司 | A kind of centrifugal hot air circulation blower |
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