CN206397809U - A kind of multistage blade centrifugal pump impeller - Google Patents
A kind of multistage blade centrifugal pump impeller Download PDFInfo
- Publication number
- CN206397809U CN206397809U CN201621231913.5U CN201621231913U CN206397809U CN 206397809 U CN206397809 U CN 206397809U CN 201621231913 U CN201621231913 U CN 201621231913U CN 206397809 U CN206397809 U CN 206397809U
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- blade
- inner ring
- outer ring
- impeller
- centrifugal pump
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Abstract
The utility model provides a kind of multistage blade centrifugal pump impeller, and its anti-cavitation performance is improved to improve flow field, it is characterised in that：(1) there is inner ring blade and outer ring blade, inner ring blade is distributed with outer ring spacing with blades.(2) adjacent blades interval angles differ 10~20 degree on circumference.(3) 50~60 degree of inner ring subtended angle of blade, 60~70 degree of outer ring subtended angle of blade.(4) inner ring blade both sides are thin, thick middle, middle thicker than both sides by 1/3rd.Outer ring vane inlet is thin, and outlet is thick, exports thicker than import by 1/2nd.
Description
Technical field
The present invention requires higher working environment suitable for anti-cavitation.
Background technology
If pressure in liquid less than some on the occasion of, then the continuity of flowing will be destroyed, the one of liquid
It will appear from a large amount of minute bubbles, bubble being liquid vapour or being previously dissolved in the gas of liquid in a little regions, this phenomenon is referred to as
Cavitation.The cavitation for being reduced by local pressure and being produced, its vacuole flows with liquid, when vacuole flow to the higher region of pressure
When, vacuole will crumble and fall.The physical phenomenon of a series of complex can occur after bubble collapse, such as vacuole is attached in impeller channel wall
Closely crumble and fall, the liquid around vacuole will continuously hit the surface of impeller channel with high frequency, surfacing then because being hit,
Fatigue and peel off.It is this due to the breakoff phenomenon referred to as cavitation corrosion crumbled and fall to wetted surfaces material of vacuole.
The energy exchange of liquid is interfered and destroyed when cavitation corrosion occurring in impeller of pump, cause pump operation characteristic change,
A series of problems, such as vibration and noise, when serious liquid stream in pump can interrupt, it is impossible to work.Cavitation and cavitation corrosion nascent in pump,
The vacuole of generation is less, and the normal work to pump simultaneously has no significant effect.But when cavitation develops to a certain extent, liquid in impeller
Energy exchange will it is significantly affected and destruction, flow, lift, efficiency and the shaft power of pump have unexpected decline.
When the cavitation of pump fully develops, effective area of passage of liquid stream can be reduced a lot, so that cause liquid stream to stop, and at this moment pump is not just
Can normal work.Cavitation erosion substantially reduces overhaul life and the service life of pump.
The Chinese invention patent that Application No. 201510679202.8 discloses a kind of high anti-cavitation centrifugal impeller waterpower
Design method, this design method is by improving the import laying angle of blade, vane thickness distribution, impeller inlet diameter and leaf
Piece entrance width, can reduce the degree of crook of blade, increase the area of passage of vane inlet, improve the efficiency of centrifugal pump,
Cavitation surplus is reduced, and cavitation performance is improved.Impeller channel is made to design subtended angle of blade by different leaves number and specific speed
Interior flowing diffusion is reduced, and flowing is reduced because the whirlpool of the separation of flow spreads to high-pressure side closer to blade shape.But it is above-mentioned special
Basic structure of the parameter description not to vane pump is only referred in profit to optimize.
For above-mentioned defect, the main anti-cavitation performance that centrifugal pump is improved by using multistage blade of the present invention.
The content of the invention
The purpose of the present invention is that multistage blade is installed in impeller, and its anti-cavitation performance, its feature are improved to improve flow field
It is：
(1) there is inner ring blade and outer ring blade, inner ring blade is distributed with outer ring spacing with blades.The outlet of inner ring blade is straight
Footpath is equal to the inlet diameter of outer ring blade.
(2) there are 3 inner ring blades and 3 outer ring blades.Adjacent blades interval angles differ 10~20 degree on circumference.
(3) 50~60 degree of inner ring subtended angle of blade, 60~70 degree of outer ring subtended angle of blade.
(4) inner ring blade both sides are thin, thick middle, middle thicker than both sides by 1/3rd.Outer ring vane inlet is thin, and outlet is thick,
Outlet is thicker than import by 1/2nd.
Brief description of the drawings
Fig. 1 is impeller blade front view；
Fig. 2 is impeller blade axial plane figure；
Embodiment
The present invention mainly improves vane pump anti-cavitation performance by the change to impeller blade this body structure, slows down leaf
The cavitation of piece.
This embodiment is that on the basis of original vane pump is given, the cavitation surplus NPSHr of vane pump is improved：
Fig. 1 and Fig. 2 combination define the present embodiment：
1st, the impeller includes inner ring blade 1 and outer ring blade 2.
2nd, with outer ring blade and inner ring blade, inner ring blade is distributed with outer ring spacing with blades.The outlet of inner ring blade is straight
Footpath is equal to the inlet diameter of outer ring blade.
3rd, with 3 inner ring blades and 3 outer ring blades.Adjacent blades interval angles differ 10~20 degree on circumference.
4th, 50~60 degree of inner ring subtended angle of blade, 60~70 degree of outer ring subtended angle of blade.
5th, inner ring blade both sides are thin, thick middle, middle thicker than both sides by 1/3rd.Outer ring vane inlet is thin, and outlet is thick, goes out
Mouth is thicker than import by 1/2nd.
Claims (5)
1. a kind of multistage blade centrifugal pump impeller, the impeller is main by inner ring blade (1), outer ring blade (2), front shroud of impeller
(3), back shroud of impeller (4) is constituted, and it is mainly characterized by：Transform inner ring blade (1), the structure of outer ring blade (2) of vane pump
To increase vane pump inlet pressure, prevent impeller inlet hypotony from causing cavitation at import, and change impeller internal blade knot
Structure carries out prevention runner interior cavitation.
2. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that：With inner ring blade and outer ring blade,
Inner ring blade is distributed with outer ring spacing with blades.
3. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that：Adjacent blades interval angles phase on circumference
Poor 10~20 degree.
4. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that：50~60 degree of inner ring subtended angle of blade, outside
Enclose 60~70 degree of subtended angle of blade.
5. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that：Inner ring blade both sides are thin, thick middle, in
Between it is thicker than both sides by 1/3rd or so, outer ring vane inlet is thin, and outlet is thick, exports thicker than import by 1/2nd or so.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621231913.5U CN206397809U (en) | 2016-11-17 | 2016-11-17 | A kind of multistage blade centrifugal pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621231913.5U CN206397809U (en) | 2016-11-17 | 2016-11-17 | A kind of multistage blade centrifugal pump impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206397809U true CN206397809U (en) | 2017-08-11 |
Family
ID=59508887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621231913.5U Expired - Fee Related CN206397809U (en) | 2016-11-17 | 2016-11-17 | A kind of multistage blade centrifugal pump impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206397809U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852937A (en) * | 2020-06-02 | 2020-10-30 | 江苏大学 | Centrifugal cavitation pump |
-
2016
- 2016-11-17 CN CN201621231913.5U patent/CN206397809U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852937A (en) * | 2020-06-02 | 2020-10-30 | 江苏大学 | Centrifugal cavitation pump |
| CN111852937B (en) * | 2020-06-02 | 2022-01-11 | 江苏大学 | Centrifugal cavitation pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170811 Termination date: 20191117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |