CN209145958U - A kind of centrifugal pump impeller that can improve flow stability - Google Patents
A kind of centrifugal pump impeller that can improve flow stability Download PDFInfo
- Publication number
- CN209145958U CN209145958U CN201821457273.9U CN201821457273U CN209145958U CN 209145958 U CN209145958 U CN 209145958U CN 201821457273 U CN201821457273 U CN 201821457273U CN 209145958 U CN209145958 U CN 209145958U
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- blade
- panel
- centrifugal pump
- drainage
- length
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Abstract
The utility model discloses a kind of centrifugal pump impellers that can improve flow stability, including impeller body, and drainage panel is equipped between the two neighboring blade of impeller body, and drainage panel 3 is located at the suction surface close to blade 2 and far from 2 head of blade.The utility model centrifugal pump impeller, the region that drainage panel is placed are that most incident region is rolled into a ball in stall, can increase solid-surface area, to increase fluid boundary layer energy, the separation of flow and stall event of the fluid in blade suction surface exit region is effectively reduced；Meanwhile there is drainage to the fluid at this, so that the fluid that the separation of flow easily occurs is changed its nowed forming.
Description
Technical field
The utility model belongs to mechanical equipment technical field, is related to a kind of centrifugal pump impeller that can improve flow stability.
Background technique
Currently, centrifugal pump is essential ancillary equipment in industry, convection current is played in fields such as power generation, chemical industry, water conservancies
The effects of body carries out increasing pressure and increases the effect of flow, and fluid is made to obtain energy, plays lubrication, cooling to mechanical equipment.
There are the structure design characteristics such as curvature is big, diffusance is negative in the blade of nearly all centrifugal pump, so that centrifugal pump is in small flow
Under operating condition water flow because boundary layer energy it is too low, lead to the water flow separation of flow and stall event, the big, efficiency so as to cause centrifugal pump vibration
It is low, have the problems such as cavitation generation, work under the operating condition, have substantial degradation to the service life of centrifugal pump for a long time.Therefore, slow down, press down
System even eliminates the generation of stall as far as possible, for avoiding centrifugal pump because of flow-induced vibration important in inhibiting caused by stall.
Utility model content
The purpose of the utility model is to provide a kind of centrifugal pump impellers that can improve flow stability, solve the prior art
Middle centrifugal pump under low flow rate condition there are stall event, and the problem of flow stability difference.
The utility model is the technical scheme adopted is that a kind of centrifugal pump impeller that can improve flow stability, including leaf
Ontology is taken turns, drainage panel is equipped between the two neighboring blade of impeller body, and close to the suction surface of blade.
The utility model is further characterized in that:
0.75 times that the distance between panel and the impeller body center of circle are impeller body radius is drained, the middle arc of panel is drained
The distance between line and blade suction surface are 0.2 times of impeller body radius.
Drainage panel is airfoil structure, and consistent with the shape of blade.
Draining panel includes head, middle part flow-passing surface and tail portion.
The length on drainage panel head takes leaf head along the 8% of aerofoil profile direction length, drains middle panel flow-passing surface
Length takes the center line of blade to extend to the 5% of length of blade to two sides respectively, and the length of drainage panel tail portion takes blade afterbody
Along the 7% of aerofoil profile direction length.
Drain 0.8 times with a thickness of vane thickness of panel.
The beneficial effects of the utility model are: a kind of centrifugal pump impeller that can improve flow stability, drainage panel is placed
Region be that most incident region is rolled into a ball in stall, solid-surface area can be increased, to increase fluid boundary layer energy, effectively dropped
The separation of flow and stall event of the low fluid in blade suction surface exit region；Meanwhile there is drainage to the fluid at this, make easily
The fluid that the separation of flow occurs changes its nowed forming.
Detailed description of the invention
Fig. 1 is a kind of structural representation for the centrifugal pump impeller that can improve flow stability of the utility model the utility model
Figure；
Fig. 2 is the structural schematic diagram of the utility model blade；
Fig. 3 is the structural schematic diagram of the utility model drainage panel.
In figure, 1. back shrouds, 2. blades, 2-1. center line, 3. drain panels, camber line in 3-1..
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of centrifugal pump impeller that can improve flow stability of the utility model, as shown in Figure 1, include impeller body 1,
It is equipped with drainage panel 3 between the two neighboring blade 2 of impeller body 1, drainage panel 3 is located at close to the suction surface of blade 2 and remote
At 2 head of blade.
0.75 times that the distance between panel 3 and 1 center of circle of impeller body are 1 radius of impeller body is drained, drainage panel 3
The distance between middle camber line 3-1 and 2 suction surface of blade are 0.2 times of 1 radius of impeller body, drain the middle camber line 3-1's of panel 3
Angle is consistent with the middle camber line of blade 2 placement angle.
Drainage panel 3 is airfoil structure, and consistent with the shape of blade 2.
Drain panel 3 include head, middle part flow-passing surface and tail portion, drain 3 head of panel geometry and blade 2 into
The geometry on mouth side is consistent；Drain the geometry and 2 pressure face of blade and suction surface geometry of 3 middle part flow-passing surface of panel
It is consistent；The geometry for draining 3 tail portion of panel is consistent with the geometry of the inlet side of blade 2, which can be more preferable
Increase boundary layer, make drain panel 3 streamline shape it is consistent with the streamline shape of blade 2, can adapt to different model from
Heart pump.
The length on drainage 3 head of panel takes the 8% (length on drainage panel 3 head of 2 head of blade along aerofoil profile direction length
For l1, the length of blade 2 is L, i.e. l1=0.08L), the length of drainage 3 middle part flow-passing surface of panel takes center line 2-1 points of blade 2
Do not extend to 2 length of blade to two sides 5% (drains the length of 3 middle part flow-passing surface of panel as l2, the length of blade 2 is L, i.e. l2
=0.1L), the length of drainage 3 tail portion of panel takes the 7% (length of drainage panel 3 tail portion of 2 tail portion of blade along aerofoil profile direction length
For l3, the length of blade 2 is L, i.e. l3=0.07L), then the length for draining panel 3 is the 25% ± 1% of 2 length of blade.
Drain 0.8 times with a thickness of 2 thickness of blade of panel 3, wherein D is the thickness of blade 2.
A kind of working principle of low specific-speed centrifugal pump impeller of the utility model is:
When work, centrifugal pump is rotated clockwise, and the centrifugal force that fluid is generated by centrifugal pump impeller rotation enters the pump housing, is relied on
Blade 2 obtains energy.When flowing through drainage panel 3, because of the increase of fluid boundary layer area, fluid obtains more boundary layer energy
Amount, to hinder the generation in stall whirlpool, the flow regime of fluid is more stable, meanwhile, there is drainage to make the fluid at this
With, make easily occur the separation of flow fluid change its nowed forming.
Claims (5)
1. a kind of centrifugal pump impeller that can improve flow stability, it is characterised in that: including impeller body (1), in impeller body
(1) drainage panel (3), and the suction surface close to blade (2) are equipped between two neighboring blade (2)；
Drainage the distance between panel (3) and impeller body (1) center of circle are 0.75 times of impeller body (1) radius, described
The distance between middle camber line (3-1) and blade (2) suction surface for draining panel (3) are 0.2 times of impeller body (1) radius.
2. a kind of centrifugal pump impeller that can improve flow stability according to claim 1, it is characterised in that: the drainage
Panel (3) is airfoil structure, and consistent with the shape of blade (2).
3. a kind of centrifugal pump impeller that can improve flow stability according to claim 2, it is characterised in that: the drainage
Panel (3) includes head, middle part flow-passing surface and tail portion.
4. a kind of centrifugal pump impeller that can improve flow stability according to claim 3, it is characterised in that: the drainage
The length on panel (3) head takes the length of blade (2) head flow-passing surface in the middle part of the 8% of aerofoil profile direction length, drainage panel (3)
It takes the center line (2-1) of blade (2) to extend to the 5% of blade (2) length to two sides respectively, drains the length of panel (3) tail portion
Take blade (2) tail portion along the 7% of aerofoil profile direction length.
5. a kind of centrifugal pump impeller that can improve flow stability according to any one of claims 1 to 4, feature exist
In: 0.8 times with a thickness of blade (2) thickness of drainage panel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821457273.9U CN209145958U (en) | 2018-09-06 | 2018-09-06 | A kind of centrifugal pump impeller that can improve flow stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821457273.9U CN209145958U (en) | 2018-09-06 | 2018-09-06 | A kind of centrifugal pump impeller that can improve flow stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209145958U true CN209145958U (en) | 2019-07-23 |
Family
ID=67266962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821457273.9U Expired - Fee Related CN209145958U (en) | 2018-09-06 | 2018-09-06 | A kind of centrifugal pump impeller that can improve flow stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209145958U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302993A (en) * | 2020-11-25 | 2021-02-02 | 江苏大学 | Centrifugal pump impeller with offset wing type short blades |
-
2018
- 2018-09-06 CN CN201821457273.9U patent/CN209145958U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302993A (en) * | 2020-11-25 | 2021-02-02 | 江苏大学 | Centrifugal pump impeller with offset wing type short blades |
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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: 20190723 Termination date: 20210906 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |