CN108591082A - A kind of axial thrust self-balance type multistage centrifugal blower - Google Patents
A kind of axial thrust self-balance type multistage centrifugal blower Download PDFInfo
- Publication number
- CN108591082A CN108591082A CN201810826643.XA CN201810826643A CN108591082A CN 108591082 A CN108591082 A CN 108591082A CN 201810826643 A CN201810826643 A CN 201810826643A CN 108591082 A CN108591082 A CN 108591082A
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- CN
- China
- Prior art keywords
- axial thrust
- disk
- centrifugal blower
- shell
- multistage centrifugal
- 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.)
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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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/164—Multi-stage fans, e.g. for vacuum cleaners
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/051—Axial thrust balancing
-
- 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
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/662—Balancing of rotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of axial thrust self-balance type multistage centrifugal blowers, including：The bearing block of shell, the multiple impellers being installed in series in shell, the main shaft of impeller rotation and supporting spindle, shell is made of exit casing, gas inlet shell and multiple assembled every disk, every the runner for forming supplied gas flowing in disk, the runner includes the first flow of linear and the second flow channel of arc, and the intermediate location of first flow and second flow channel is provided with multiple be evenly distributed and the identical tooth profile slice of radial angle every disk.By balancing the axial thrust of fan rotor that every tooth profile slice is arranged on disk, can generate propulsive thrust, rotor thrust moves face smaller, prevents the damage parts such as bearing, ensure that the normal work of centrifugal blower；Moreover, the structure eliminates bulky balance disc elements commonly used in the prior art, the rotary inertia of wind turbine is reduced, keeps wind turbine start and stop more steady, running balance is more preferable and lower noise.
Description
Technical field
The present invention relates to a kind of multistage centrifugal blowers, and in particular to a kind of centrifugation air blast for capableing of balancing axial thrust
Machine；Belong to Fan Equipment technical field.
Background technology
Multistage centrifugal blower is a kind of rotating vane machinery that prime mover tool can be changed into gas pressure energy.It is continuous to supply
Gas is the main feature of multistage centrifugal blower, when work, when gas by inlet plenum evenly into impeller after, in rotation
Diffusion action in blade in by centrifugation force effect and impeller enables its most of speed to be transformed into pressure energy, such gas
After 2 ~ 10 grades of continuous compressions, required pressure is obtained.When the rotation of the blade of centrifugal blower, had in exhaust end
The gas of certain pressure, while certain negative pressure is also formed in inlet end, by the directly logical air of exhaust end, inlet end passes through pipe
Road connect with the container that need to be vacuumized and becomes centrifugal vacuum wind turbine, this container cannot completely enclose, and should maintain a certain amount of
Gas circulates.
The casing of high-pressure multi-stage centrifugal blower currently on the market is using vertical cover, the mounting means vertically assembled.
Multiple impellers are that a rotor set is used in operation due to the independence of the single impeller single housing of vertical cover between at different levels
Labyrinth seal, to prevent gas short circuit from leaking.Wind turbine in the running, acts on axial thrust on rotor, factor include with
Lower several points：（1）Disk non complete symmetry generates axial thrust before and after impeller；（2）Gas axially into impeller, radially flow out and will produce
Axial thrust；（3）Axial thrust caused by rotor weight.Moreover, with exhaust section pressure rise, axially pushed away closer to exhaust end
Power more increases, and causes that bearing temperature is higher, bearing life shortens, and centrifugal blower damage of components is may result in, to wind turbine
Normal operation has a significant impact.
It to solve the above-mentioned problems, can be certain by increasing balance disc elements in exhaust section in the common wind turbine of Fig. 1
Axial thrust of the wind turbine to rotor is reduced in degree, but balancing frame and shell mechanism can be caused to become complicated in this way, and material adds
Weight, main shaft lengthens, thus can increase the rotary inertia of rotor, and the other component size overstriking of inevitable requirement main shaft class, material increase
Add, production cost is caused to rise, the wind turbine produced lacks market competition advantage.
Application No. is 201320046595.5 Chinese patents to disclose a kind of multilevel aluminum blade wheel sewage disposal centrifugation air blast
Machine, though can optimize running balance, considerably increases impeller by being cast with 36 at impeller inlet circle into mouth circle tooth
Manufacture difficulty, and can cause to wear after impeller longtime running, easily make impeller disequilibrium.Application No. is 201120505022.5
Chinese patent discloses a kind of centrifugal blower fan blade wheel, including blade and the hub disk that is arranged on blade, perpendicular to rear on hub disk
Disk is provided with propulsive thrust blade, can reduce the axial movement of axial thrust drive rotor.But the program be also will be to impeller
Structure is improved, and manufacture difficulty is larger, and cost is higher.In view of the foregoing, it is necessary to a kind of easy to implement, cost of exploitation compared with
Low and good reliability improvement, to solve the problems, such as the axial thrust of centrifugal blower.
Invention content
To solve the deficiencies in the prior art, the purpose of the present invention is to provide it is a kind of it is easy to implement, being capable of active balance
The centrifugal blower of axial thrust reduces the axial thrust of fan rotor, keeps fan operation more steady.
In order to realize that above-mentioned target, the present invention adopt the following technical scheme that：
A kind of axial thrust self-balance type multistage centrifugal blower, including：Shell, the multiple impellers being installed in series in shell,
Impeller rotation main shaft and supporting spindle bearing block, the shell by exit casing, gas inlet shell and it is multiple every disk assemble
Constitute, it is described every in disk formed supplied gas flowing runner, the runner include linear first flow and arc second
Runner, it is described that the intermediate location of first flow and second flow channel is provided with multiple be evenly distributed and radial angle is identical every disk
Tooth profile slice.
Preferably, aforementioned impeller quantity is 2 ~ 10, depending on the series needed with specific reference to equipment.
Preferably, the air inlet and exhaust outlet being connected to runner, gas are respectively formed on aforementioned gas inlet shell and exit casing
Enter from air inlet, is discharged from exhaust outlet after the effect boosting of several levels impeller, while forming negative pressure at air inlet.
More preferably, it is formed with no leaf diffusion structure at the air outlet of aforementioned impeller, the kinetic energy of impeller is effectively recycled
Static energy is converted to, while playing the role of collection and drawing gas.
It is highly preferred that aforementioned no leaf diffusion structure close to each other makes cross section of fluid channel accumulate by two wall surfaces of impeller air outlet
Become smaller and is formed.
It is further preferred that aforementioned be equipped with an annular groove every disk, the tooth profile slice is located in annular groove, and tooth form
The top surface of piece is without departing from every panel surface.
Still further preferably, aforementioned tooth profile slice and the angle radially constituted are 15 ° ~ 45 °.
It is highly preferred that aforementioned tooth profile slice is integrally formed with every disc main body by casting process.
More preferably, aforementioned to be made of cast iron, magnesium iron, aluminium alloy or stainless steel every disk.
The invention has the beneficial effects that：The centrifugal blower of the present invention can be generated every being provided with tooth profile slice on disk
Propulsive thrust balances the axial thrust of fan rotor, and rotor thrust moves face smaller, prevent the damage parts such as bearing, ensure that from
The normal work of heart air blower；Moreover, the structure eliminates bulky balance disc elements commonly used in the prior art, wind is reduced
The rotary inertia of machine keeps wind turbine start and stop more steady, and running balance is more preferable and lower noise.
Description of the drawings
Fig. 1 is the structural schematic diagram of centrifugal blower in the prior art；
Fig. 2 is the cut-away section structural schematic diagram of a preferred embodiment of the present invention；
Fig. 3 is partial enlargement structural representation in Fig. 2；
Fig. 4 is in Fig. 2 every the front of disk（Top half）Structural schematic diagram.
The meaning of reference numeral in figure：01, return-air seat, 02, balancing frame, 03, muffler；1, main shaft, 2, air inlet end bearing
Seat, 3, impeller, 4, gas inlet shell, 5, exit casing, 6, every disk, 61, first flow, 62, second flow channel, 7, tooth profile slice, 8, exhaust end
Bearing block.
Specific implementation mode
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
Fig. 2 is the structural schematic diagram of the centrifugal blower of the present invention, in order to more clearly demonstrate its structure, to its first half
Divide and has carried out section displaying.The centrifugal blower of the present invention can realize axial thrust self-balancing, can generate propulsive thrust
The axial thrust of fan rotor is balanced, specifically, which includes：Shell, multiple impellers 3, the band being installed in series in shell
The bearing block of main shaft 1 and supporting spindle 1 that movable vane wheel 3 rotates, bearing block specifically include air inlet end bearing block 2 and exhaust end axis
Bearing 8.Wherein, shell is made of exit casing 5, gas inlet shell 4 and multiple assembled every disk 6, on gas inlet shell 4 and exit casing 5 respectively
It is formed with the air inlet and exhaust outlet being connected to every the runner in disk 6, gas enters shell in a direction indicated by the arrow from air inlet
It is interior, it is discharged in a direction indicated by the arrow from exhaust outlet after the effect boosting of several levels impeller 3, while negative pressure is formed at air inlet.Impeller 3
Quantity is 2 ~ 10, and particular number is depending on the series that equipment needs.
In order to improve fan efficiency, no leaf diffusion structure is also formed at the air outlet of impeller 3, such as the places A in Fig. 3
Show, the effectively recycling of the kinetic energy of impeller 3 can be converted to static energy by this without leaf diffusion structure, while being played collection and being drawn gas
Effect.In the present invention without leaf diffusion structure by 3 air outlet of impeller two wall surfaces it is close to each other make cross section of fluid channel product become
It is small and formed, it is not necessarily to increase additional component in this way, reduces equipment cost and easy for installation.
As previously described, the runner that supplied gas flowing is formed in the disk 6, specific in the wind turbine of the present invention, runner packet
Include the first flow 61 of linear and the second flow channel 62 of arc, every disk 6 first flow 61 and second flow channel 62 transition part
Position（That is the sealing gland face of impeller 3）It is provided with multiple be evenly distributed and the identical tooth profile slice 7 of radial angle, angle [alpha] are preferably 15 °
~45°.Concrete structure is equipped with an annular groove referring to Fig. 3 and Fig. 4, every disk 6, and tooth profile slice 7 is then located in annular groove, and tooth
The top surface of shape piece 7 is without departing from every 6 surface of disk.When manufacture, tooth profile slice 7 be every 6 ontology of disk it is integrally formed by casting process,
Cast iron, magnesium iron, aluminium alloy or stainless steel etc. may be selected in specific material, depending on specific equipment.
So, wind turbine of the invention just eliminates the bulky balance disc elements in existing wind turbine as shown in Figure 1,
I.e. on the basis of ensuring the fan performance and service life, the components such as balancing frame 02, muffler 03 and return-air seat 01 are eliminated, significantly
Blower fan structure is optimized, reduces the diameter of axle, so that rotary inertia is improved, reduce the production cost of wind turbine, improve operational efficiency.
To sum up, centrifugal blower of the invention by every on disk 6 be provided with and the 3 matched tooth profile slice in sealing gland face of impeller
7, when impeller 3 rotates, tooth profile slice 7 can be such that the angular velocity of rotation of gas in cavity increases, and allow gas to enough generation propulsive thrust
To balance the axial thrust of fan rotor so that rotor thrust moves face smaller, reduces axial displacement, prevents the parts such as bearing from damaging
It is bad, it ensure that the normal work of centrifugal blower, while keeping wind turbine start and stop more steady, running balance is more preferable and noise drops
It is low.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is all fallen in protection scope of the present invention.
Claims (9)
1. a kind of axial thrust self-balance type multistage centrifugal blower, which is characterized in that including：Shell is installed in series in shell
The bearing block of interior multiple impellers, the main shaft of impeller rotation and supporting spindle, the shell by exit casing, gas inlet shell and
Multiple assembled every disk is constituted, and described every the runner for forming supplied gas flowing in disk, the runner includes the first flow of linear
With the second flow channel of arc, it is described every disk the intermediate location of first flow and second flow channel be provided with it is multiple be evenly distributed and
The identical tooth profile slice of radial angle.
2. a kind of axial thrust self-balance type multistage centrifugal blower according to claim 1, which is characterized in that the leaf
It is 2 ~ 10 to take turns quantity.
3. a kind of axial thrust self-balance type multistage centrifugal blower according to claim 1, which is characterized in that it is described into
The air inlet and exhaust outlet being connected to runner are respectively formed on gas shell and exit casing.
4. a kind of axial thrust self-balance type multistage centrifugal blower according to claim 1, which is characterized in that the leaf
No leaf diffusion structure is formed at the air outlet of wheel.
5. a kind of axial thrust self-balance type multistage centrifugal blower according to claim 4, which is characterized in that the nothing
Leaf diffusion structure close to each other makes cross section of fluid channel product become smaller and formed by two wall surfaces of impeller air outlet.
6. according to a kind of axial thrust self-balance type multistage centrifugal blower of claim 1 ~ 5 any one of them, feature exists
In described to be equipped with an annular groove every disk, the tooth profile slice is located in annular groove, and the top surface of tooth profile slice is without departing from every disk
Surface.
7. a kind of axial thrust self-balance type multistage centrifugal blower according to claim 6, which is characterized in that the tooth
Shape piece and the angle radially constituted are 15 ° ~ 45 °.
8. a kind of axial thrust self-balance type multistage centrifugal blower according to claim 6, which is characterized in that the tooth
Shape piece is integrally formed with every disc main body by casting process.
9. a kind of axial thrust self-balance type multistage centrifugal blower according to claim 8, which is characterized in that it is described every
Disk is made of cast iron, magnesium iron, aluminium alloy or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810826643.XA CN108591082A (en) | 2018-07-25 | 2018-07-25 | A kind of axial thrust self-balance type multistage centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810826643.XA CN108591082A (en) | 2018-07-25 | 2018-07-25 | A kind of axial thrust self-balance type multistage centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591082A true CN108591082A (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810826643.XA Pending CN108591082A (en) | 2018-07-25 | 2018-07-25 | A kind of axial thrust self-balance type multistage centrifugal blower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340144A (en) * | 2018-10-15 | 2019-02-15 | 佛山冠博机械科技发展有限公司 | Multi-stage centrifugal fan |
| CN114776607A (en) * | 2022-05-17 | 2022-07-22 | 山东省章丘鼓风机股份有限公司 | Weight reducing structure and method for centrifugal fan |
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| CN1637301A (en) * | 2004-01-08 | 2005-07-13 | 三星电子株式会社 | Turbo compressor |
| JP2006057487A (en) * | 2004-08-18 | 2006-03-02 | Mitsubishi Heavy Ind Ltd | Centrifugal compressor |
| CN101165357A (en) * | 2006-10-19 | 2008-04-23 | 三菱重工业株式会社 | Centrifugal fan |
| JP2014084803A (en) * | 2012-10-24 | 2014-05-12 | Mitsubishi Heavy Ind Ltd | Centrifugal fluid machine |
| CN104963876A (en) * | 2015-08-05 | 2015-10-07 | 江苏涞森环保设备有限公司 | Efficient and energy-saving three-dimensional-flow multi-stage centrifugal blower |
| CN106574636A (en) * | 2014-06-24 | 2017-04-19 | 概创机械设计有限责任公司 | Flow control structures for turbomachines and methods of designing the same |
| CN208634062U (en) * | 2018-07-25 | 2019-03-22 | 江苏涞森环保设备有限公司 | A kind of axial thrust self-balance type multistage centrifugal blower |
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2018
- 2018-07-25 CN CN201810826643.XA patent/CN108591082A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54142805U (en) * | 1978-03-29 | 1979-10-03 | ||
| CN1637301A (en) * | 2004-01-08 | 2005-07-13 | 三星电子株式会社 | Turbo compressor |
| JP2006057487A (en) * | 2004-08-18 | 2006-03-02 | Mitsubishi Heavy Ind Ltd | Centrifugal compressor |
| CN101165357A (en) * | 2006-10-19 | 2008-04-23 | 三菱重工业株式会社 | Centrifugal fan |
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| CN208634062U (en) * | 2018-07-25 | 2019-03-22 | 江苏涞森环保设备有限公司 | A kind of axial thrust self-balance type multistage centrifugal blower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340144A (en) * | 2018-10-15 | 2019-02-15 | 佛山冠博机械科技发展有限公司 | Multi-stage centrifugal fan |
| CN114776607A (en) * | 2022-05-17 | 2022-07-22 | 山东省章丘鼓风机股份有限公司 | Weight reducing structure and method for centrifugal fan |
| CN114776607B (en) * | 2022-05-17 | 2024-04-02 | 山东省章丘鼓风机股份有限公司 | Weight reduction structure and method of centrifugal fan |
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Application publication date: 20180928 |