CN206943079U - A kind of axial-flow pump impeller for improving anti-cavitation performance - Google Patents
A kind of axial-flow pump impeller for improving anti-cavitation performance Download PDFInfo
- Publication number
- CN206943079U CN206943079U CN201720470335.9U CN201720470335U CN206943079U CN 206943079 U CN206943079 U CN 206943079U CN 201720470335 U CN201720470335 U CN 201720470335U CN 206943079 U CN206943079 U CN 206943079U
- Authority
- CN
- China
- Prior art keywords
- top surface
- blade
- axial
- impeller
- flow pump
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model belongs to pump design field, in particular relates to a kind of axial-flow pump impeller for improving anti-cavitation performance.The utility model includes the blade being arranged on wheel hub, and the blade includes pressure face and suction surface, it is characterised in that：The circumferential outer rim of the blade is provided with the top surface for connecting the pressure face and suction surface, and the top surface is in the convex-shaped away from wheel hub side protrusion.The utility model effectively reduces the air bubble number of blade suction surface, reduces various whirlpools at blade top surface, improve blade anti-cavitation performance, improve the service behaviour of pump by carrying out the design of aerofoil profile to blade top surface.
Description
Technical field
The utility model belongs to pump design field, in particular relates to a kind of axial-flow pump leaf for improving anti-cavitation performance
Wheel.
Background technology
With the needs of progress and the social development of science and technology, pump has become one of more extensive machinery of modern use,
Wherein axial-flow pump account for larger ratio, and the impeller of axial-flow pump and blade are the core components of axial-flow pump, and their design is straight
Connecing influences the runnability of axial-flow pump.The blade top surface shape of traditional axial-flow pump impeller is similar to rectangular shape, works as fluid stream
When crossing blade top surface areas, angle whirlpool can be produced in blade top surface entrance, exit, which can produce, departs from whirlpool and leakage vortex, makes pump
Anti-cavitation performance be deteriorated, blade suction surface can be caused accelerate cavitation and damage etc. harmful effect, can cause when serious pump discharge,
The performance such as lift and efficiency reduces, or even the normal operation for causing cutout to influence pump.
Utility model content
According to problems of the prior art, the utility model provides a kind of axial-flow pump leaf for improving anti-cavitation performance
It wheel, can effectively weaken the various whirlpools at blade top surface, improve blade anti-cavitation performance, the service behaviour of elevator pump.
To realize above-mentioned purpose of utility model, the utility model uses following technical scheme：
A kind of axial-flow pump impeller for improving anti-cavitation performance, including the blade being arranged on wheel hub, the blade include pressure
Power face and suction surface, it is characterised in that：The circumferential outer rim of the blade is provided with the top surface for connecting the pressure face and suction surface, institute
It is in the convex-shaped away from wheel hub side protrusion to state top surface.
Preferably, the side towards pressure face of the top surface by it is smooth it is tangent in a manner of be connected with the pressure face；
It is to smoothly transition from along even between the top surface and suction surface.
Preferably, the radial direction spacing between each point of top surface and the pressure face or suction surface is formed as at top surface respective point
Top thickness, if T is the maximum gauge of top surface, C is the beeline between the inside pipe wall of pipeline where top surface and impeller, then
Gap size can be calculated as follows than δ：The gap size is than δ=1.
Preferably, the summit of the top surface is that the solstics between top surface and the wheel hub is connected with each other to form impeller outer edge
Line, any point and the distance between the central axis of the wheel hub on the impeller outer edge line are equal.
Preferably, central axial direction of the impeller outer edge line that the top surface summit is formed along wheel hub is in the top surface
Centre position.
Further, the radius of curvature of the top surface of the deviation pressure face side in impeller outer edge line, which is less than, is in impeller outer
The radius of curvature of the top surface of the deviation suction surface side of edge line.
The beneficial effects of the utility model are：
1) the utility model effectively reduces the sky of blade suction surface by carrying out the design of aerofoil profile to blade top surface
Bubbles number, various whirlpools at blade top surface are reduced, improve blade anti-cavitation performance, improve the service behaviour of pump.
2) the utility model is in the top when central axial direction of the impeller outer edge line along wheel hub that top surface summit is formed
During the centre position in face, the anti-cavitation performance of pump reaches optimal.
Brief description of the drawings
Fig. 1 is the utility model positive structure schematic.
Fig. 2 is the utility model overlooking the structure diagram.
Fig. 3 is the utility model broken section structural representation.
Fig. 4 is spike type, uniform type, S types and four kinds of aerofoil profile leaves of basic type of the prior art in the utility model
Piece top schematic diagram.
Fig. 5 is the schematic diagram of T and C in calculation formula of the utility model gap size than δ.
Fig. 6, Fig. 7, Fig. 8 are the utility model gap size when than δ being respectively 0.5,0.75,1, spike type, uniform type, S
Four kinds of aerofoil profile blade critical NPSH performance diagrams such as type, basic type.
Reference：
10- blade 11- pressure face 12- suction surface 13- top surface 131- impeller outer edge lines
20- wheel hubs
30- pipelines
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in Figure 1 and Figure 2, a kind of axial-flow pump impeller for improving anti-cavitation performance, including the blade being arranged on wheel hub 20
10, the blade 10 includes pressure face 11 and suction surface 12, and the circumferential outer rim of the blade, which is provided with, connects the He of pressure face 11
The top surface 13 of suction surface 12.
As shown in Fig. 3, Fig. 4, Fig. 5, the top surface 13 is in the convex-shaped away from the side of wheel hub 20 protrusion.In fact, Fig. 4
In D parts shown in the basic type top surface of blade be conventional blade design structure, it will thus be seen that traditional axial-flow pump leaf
The blade top surface 13 of wheel is more straight.And the blade top surface 13 in the utility model changes on traditional basic type top surface
Enter, this improve is disposed as to impeller wheel by the side of the close pressure face of basic type top surface and close to the side of suction surface
The direction bending of hub, so as to form the top surface 13 in convex-shaped as shown in A, B, C in Fig. 4, i.e., in the utility model
The distance between each point and the inside pipe wall of pipeline 30 on top surface 13 be gradually reduced from the lateral suction surface side of pressure face 11 1 and by
Flaring is big.
As shown in figure 5, the side towards pressure face 11 of the top surface 13 by it is smooth it is tangent in a manner of with the pressure face
11 are connected, i.e. the top of top surface 13 and pressure face 11 is tangent；It is suitable to smoothly transition between the top surface 13 and suction surface 12
Even.
It is connected with each other shape as shown in Fig. 2 the summit of the top surface 13 is solstics between top surface 13 and the wheel hub 20
Into impeller outer edge line 131, the distance between central axis of any point and the wheel hub 20 on the impeller outer edge line 131 R
It is equal.
As shown in figure 5, the radial direction spacing between each point and the pressure face 11 or suction surface 12 of composition top surface 13 is top
Top thickness at the respective point of face, if T is the maximum gauge of top surface 13, C is the inside pipe wall of top surface 13 and pipeline 30 where impeller
Between beeline, then gap size can be calculated as follows than δ：, gap size described in the utility model than δ=
1。
As shown in figure 4, A, B, C in Fig. 4 respectively show the blade top surface 13 of three types, wherein part A represents
Likeness in form spike one kind aerofoil profile of summit deviation pressure face 11 side of top surface 13, the summit that part B represents top surface 13 is in pressure
Likeness in form parabola one kind aerofoil profile in the centre position between power face 11 and suction surface 12, the summit that C portion represents top surface 13 are inclined
To the side of pressure face 11 and a kind of aerofoil profile of top surface cross section profile likeness in form S-shaped shape, tri- kinds of shapes of blade top surface 13 of A, B, C in Fig. 4
Shape scheme is designated as spike type, uniform type and S types respectively, and the scheme of traditional blades top surface 13 is designated as basic type.
The cavitation surplus of lift decline 3% is taken to be equal to the vapour of pump for Critical Cavitation Coefficient point NPSHc, NPSHc value in analogue simulation
Margin value is lost, because the net positive suction head of pump is not easy to measure, therefore with NPSHc come instead of measurement, NPSHc values are smaller, the anti-cavitation of pump
Performance is better.In the same circumstances, the relatively conventional basic type leaf of the shape scheme of blade top surface 13 of three kinds of aerofoil profiles in test chart 4
The improvement effect of piece top surface 13, test result is as shown in Fig. 6, Fig. 7, Fig. 8 and table 1.
Table 1：
| Gap size compares δ | Performance parameter | Spike type (A) | Uniform type (B) | S types (C) | Basic (D) |
| 0.5 | NPSHc/m | 0.429 | 0.425 | 0.428 | 0.468 |
| 0.75 | NPSHc/m | 0.423 | 0.422 | 0.427 | 0.452 |
| 1 | NPSHc/m | 0.410 | 0.407 | 0.411 | 0.432 |
Respectively obtained by table 1 NPSHc of 4 kinds of aerofoil profile schemes, spike type and S types gap size ratio δ be respectively 0.5,
0.75th, reduce 8.33%, 6.41%, 5.09% and 8.54% than basic type scheme respectively in the case of 1,5.53%,
4.86%, uniform type gap size than reducing 9.19% than basic type scheme in the case of respectively 0.5,0.75,1,
6.64%th, 5.79%, therefore, spike type, the top surface 13 of three kinds of aerofoil profile blades of uniform type and S types have to anti-cavitation performance to be changed
Enter effect, wherein under low discharge, 13 improvements of uniform type airfoil fan top surface are most obvious.
As shown in Fig. 4 part B, the central axis of impeller outer edge line 131 that the summit of top surface 13 is formed along wheel hub 20
Direction is in the centre position of the top surface 13.
As shown in Fig. 4 A, B, C three parts, the song of the top surface of deviation pressure face 11 side in impeller outer edge line 131
Rate radius is less than the radius of curvature of the top surface of deviation suction surface 12 side in impeller outer edge line 131.
Claims (6)
1. a kind of axial-flow pump impeller for improving anti-cavitation performance, including the blade (10) being arranged on wheel hub (20), the blade
(10) pressure face (11) and suction surface (12) are included, it is characterised in that：The circumferential outer rim of the blade, which is provided with, connects the pressure
Face (11) and the top surface (13) of suction surface (12), the top surface (13) are in the convex-shaped away from wheel hub (20) side protrusion.
A kind of 2. axial-flow pump impeller for improving anti-cavitation performance according to claim 1, it is characterised in that：The top surface
(13) the side towards pressure face (11) by it is smooth it is tangent in a manner of be connected with the pressure face (11)；The top surface (13)
It is to smoothly transition from along even between suction surface (12).
A kind of 3. axial-flow pump impeller for improving anti-cavitation performance according to claim 1 or 2, it is characterised in that：Form top
Radial direction spacing between each point and the pressure face (11) or suction surface (12) in face (13) is thick for the top surface at top surface respective point
Degree, if T is the maximum gauge of top surface (13), C is the most short distance between the inside pipe wall of pipeline (30) where top surface (13) and impeller
From then gap size can be calculated as follows than δ：The gap size is than δ=1.
A kind of 4. axial-flow pump impeller for improving anti-cavitation performance according to claim 3, it is characterised in that：The top surface
(13) summit is that the solstics between top surface (13) and the wheel hub (20) is connected with each other to form impeller outer edge line (131), institute
State any point on impeller outer edge line (131) and the distance between the central axis of the wheel hub (20) is equal.
A kind of 5. axial-flow pump impeller for improving anti-cavitation performance according to claim 4, it is characterised in that：The top surface
(13) central axial direction of the impeller outer edge line (131) that summit is formed along wheel hub (20) is in the interposition of the top surface (13)
Put.
A kind of 6. axial-flow pump impeller for improving anti-cavitation performance according to claim 5, it is characterised in that：In impeller outer
The radius of curvature of the top surface of deviation pressure face (11) side of edge line (131) is less than the deviation in impeller outer edge line (131) and inhaled
The radius of curvature of the top surface of power face (12) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720470335.9U CN206943079U (en) | 2017-04-28 | 2017-04-28 | A kind of axial-flow pump impeller for improving anti-cavitation performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720470335.9U CN206943079U (en) | 2017-04-28 | 2017-04-28 | A kind of axial-flow pump impeller for improving anti-cavitation performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206943079U true CN206943079U (en) | 2018-01-30 |
Family
ID=61359335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720470335.9U Withdrawn - After Issue CN206943079U (en) | 2017-04-28 | 2017-04-28 | A kind of axial-flow pump impeller for improving anti-cavitation performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206943079U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958534A (en) * | 2017-04-28 | 2017-07-18 | 合肥工业大学 | A kind of axial-flow pump impeller for improving anti-cavitation performance |
-
2017
- 2017-04-28 CN CN201720470335.9U patent/CN206943079U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958534A (en) * | 2017-04-28 | 2017-07-18 | 合肥工业大学 | A kind of axial-flow pump impeller for improving anti-cavitation performance |
| CN106958534B (en) * | 2017-04-28 | 2023-05-16 | 合肥工业大学 | Axial flow pump impeller capable of improving cavitation resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206636838U (en) | A kind of new diffuser and the blower fan including the diffuser | |
| US20150176594A1 (en) | Radial impeller for a drum fan and fan unit having a radial impeller of this type | |
| CN106704261A (en) | Axial flow fan ternary impeller with vein-shaped structure and nonuniform empennage | |
| CN105805043A (en) | Design method for nonadjustable axial flow pump impeller with characteristic of long blades and short blades | |
| CN106762840A (en) | Half vane diffuser high and its method for designing of a kind of both sides arrangement | |
| CN107061329A (en) | A kind of axial flow blower | |
| CN204532956U (en) | Centrifugal impeller, centrifugal blower assembly and air-conditioner set | |
| CN107061321A (en) | The compressor of variable asymmetric vaned diffuser is coupled using established angle and denseness | |
| CN106089808B (en) | A kind of blade diffuser and its formative method with trailing edge structures before swallow-tail form | |
| CN104653515A (en) | Double-suction type centrifugal ventilation fan | |
| CN113090580B (en) | Centrifugal impeller blade with S-shaped front edge and modeling method thereof | |
| CN103573703B (en) | Axial-flow leaf | |
| CN108980103B (en) | Design method of forward multi-wing centrifugal ventilator impeller with inlet winglet | |
| CN206943079U (en) | A kind of axial-flow pump impeller for improving anti-cavitation performance | |
| CN204921480U (en) | Centrifugal compressor model level | |
| CN206929130U (en) | Axial flow blower 3 d impeller with leaf vein texture and sea-gull type splitterr vanes | |
| CN207004920U (en) | Axial flow blower 3 d impeller with leaf vein texture and circular arc post splitterr vanes | |
| CN205639070U (en) | Blade suction surface has broken structure in whirlpool and grooved axial fan in leaf top | |
| CN202348525U (en) | Axial-flow rotary propeller type water turbine | |
| CN109505790B (en) | High-load high-through-flow-capacity axial flow fan | |
| JP2016050486A (en) | Fluid machinery and impeller of fluid machinery | |
| CN108757568B (en) | Axial flow fan blade | |
| CN108443218B (en) | Pump impeller with secondary splitter blade | |
| CN207004919U (en) | Axial flow blower 3 d impeller with leaf vein texture and splitterr vanes | |
| CN204099272U (en) | A kind of low specific-speed centrifugal pump impeller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230516 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230516 |