CN206221381U - A kind of axial-flow pump water feed apparatus - Google Patents
A kind of axial-flow pump water feed apparatus Download PDFInfo
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- CN206221381U CN206221381U CN201621308765.2U CN201621308765U CN206221381U CN 206221381 U CN206221381 U CN 206221381U CN 201621308765 U CN201621308765 U CN 201621308765U CN 206221381 U CN206221381 U CN 206221381U
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- outer tube
- axial
- flow pump
- inner sleeve
- export
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Abstract
The utility model discloses a kind of axial-flow pump water feed apparatus, the two ends of outer tube are respectively entrance point and the port of export, port of export outer wall is provided with outlet(discharge) flange, the port of export of outer tube is connected with the entrance point of axial-flow pump impeller room by outlet(discharge) flange, the entrance point outer wall of outer tube is provided with suction flange, and the entrance point of outer tube can be connected with inlet channel by suction flange；Inner sleeve is provided with outer tube, there is gap between inside and outside sleeve pipe, gusset is provided with the gap, be fixedly connected inside and outside sleeve pipe by the gusset, the whirlpool plate that disappears is provided with inner sleeve inside pipe wall.The utility model substantially improves the influent stream condition before impeller under low flow rate condition, completely eliminates that axial-flow pump waterpower is unstable " saddle area ", has effectively widened the safe and stable operation condition range of axial-flow pump.Simple structure of the present utility model and easy processing making, it is adaptable to any kind of axial-flow pump.
Description
Technical field
The utility model belongs to pump technology field, and in particular to a kind of axial-flow pump water feed apparatus.
Background technology
Axial-flow pump has the characteristics of flow is big, lift is low, be widely used in distruting water transregionally, agricultural irrigation and municipal administration to
The fields such as draining.Under design conditions, axial-flow pump flow condition is good, internal flow stabilization, and now the hydraulic efficiency of pump is higher
And it is stable.But, under off-design behaviour during especially low flow rate condition, the change of impeller inlet inflow angle is not only drawn
Rise and flow separation is produced at vacuum side of blade inlet side, also result in the increase of blade upper and lower surface pressure difference and promote clearance leakage of blade tip stream to increase
By force.Vacuum side of blade separate stream with the flow direction of impeller blade-tip leakage flow with main flow direction conversely, simultaneously because being revolved by impeller
The influence for transferring to causes that above-mentioned flowing has larger circumferential speed, so that clogging impeller inlet channel, deterioration water pump influent stream
Condition, causes the hydraulic loss increase of pump, pump performance drastically to decline, and promotes the formation of waterpower unstable " saddle area ", seriously
Influence the safe and stable operation of axial-flow pump.
Utility model content
The purpose of this utility model is directed to the deficiency of existing axial-flow pump water feed apparatus, proposes a kind of axial-flow pump water inlet dress
Put, will not to design discharge and big flow operating mode under pump hydraulic performance produce considerable influence in the case of, can fully improve
Flow condition under low flow rate condition before axial-flow pump impeller import, is completely eliminated the generation of axial-flow pump unstable " saddle area ", has
The operating condition that effect widens axial-flow pump stabilization is interval.
To realize the purpose of this utility model, adopt the following technical scheme that：
A kind of axial-flow pump water feed apparatus, including outer tube, the two ends of outer tube are respectively entrance point and the port of export, the port of export
Outer wall is provided with outlet(discharge) flange, and the outlet(discharge) flange is uniformly distributed along the circumference 4~12 screws, the port of export and the axial-flow pump leaf of outer tube
The entrance point of engineer room is connected by outlet(discharge) flange, and the diameter D of the outer tube port of export is straight equal to the entrance point of axial-flow pump impeller room
Footpath；
The entrance point outer wall of outer tube is provided with suction flange, and the suction flange is uniformly distributed along the circumference 4~12 screws, outward
The entrance point of sleeve pipe can be connected with inlet channel by suction flange；
Inner sleeve is provided with outer tube, there is gap between inner sleeve and outer tube, gusset is provided with the gap, led to
Cross the gusset to be fixedly connected inner sleeve with outer tube, the whirlpool plate that disappears is provided with inner sleeve inside pipe wall.
The above inner sleeve outside wall surface passes through 4~6 gussets evenly distributed in the circumferential direction with outer sleeve inner wall face
Connection；6~18 evenly distributed in the circumferential direction whirlpool plates that disappear on the inwall of the inner sleeve；The import and export side of the gusset is equal
Rounding treatment is carried out to reduce water impact loss.
The structure and position dimension of outer tube described in the utility model, inner sleeve, gusset and the whirlpool plate that disappears are used to overcoat
Relative value on the basis of pipe outlet diameter D represents that be applied this reality by these relative values are multiplied by into outer tube outlet diameter D
With new actual size.
Preferably, the outlet of the outer tube is connected with the import of axial-flow pump impeller room by flange, and outer tube goes out
Mouth diameter D is equal to the inlet diameter of axial-flow pump impeller room；The cone angle of the outer tube be 5~60 °, inlet diameter be 1.05~
5D, is highly 0.05~3D；The import of the outer tube can be open, can be also connected by flange with inlet channel.
Used as a kind of optimal technical scheme of the present utility model, the outer tube is with identical taper with inner sleeve
Pyramidal structure, entrance point diameter is big compared with the port of export.
Further, the thickness of the inner sleeve is 0.001~0.01D, inner sleeve and overcoat tube pitch be 0.005~
0.1D。
Further, the entrance point of the inner sleeve and the entrance point of outer tube are concordant, and the port of export of inner sleeve is higher than outer
The port of export of sleeve pipe, after outer tube is connected with axial-flow pump impeller room, the port of export of inner sleeve is at impeller leaf top；The inner sleeve
The import and export end of pipe is rounding design.
Further, whirlpool plate circumference uniform distribution is disappeared on the inwall of inner sleeve, the whirlpool plate that disappears is sector structure, on circumferencial direction
The angle of two sides is 5~20 °；The length of said vortex reducing plate is equal with the bus length of inner sleeve inside pipe wall, the thickness of the whirlpool plate that disappears
It is 0.01~0.2D.
Preferably, the width of the gusset is 0.001~0.005D；The length of the gusset and the bus of outer sleeve inner wall
Equal length.
The utility model the above outer tube, suction flange, outlet(discharge) flange, inner sleeve, gusset and the whirlpool plate that disappears can be adopted
With metal material, plastic material or pmma material processing and fabricating.
The utility model is based on fluid dynamic theory and axial-flow pump design theory, by low flow rate condition lower axle stream
It is a kind of simple structure for being proposed, scientific and reasonable on the basis of test measurement, the numerical simulation analysis of pump inside Complex Flows
Water feed apparatus.
The beneficial effects of the utility model are：
Inner sleeve in the utility model can be carried out the main flow at the tip leakage flow at blade and blade top and impeller central
Separate, prevent clearance leakage of blade tip stream from being influenceed on the obstruction of main flow, while gusset can also reduce the circumferential speed of clearance leakage of blade tip stream
The hydraulic loss that degree causes；The uniform whirlpool plate that disappears rotates in a circumferential direction flowing before can playing weakening impeller inlet on inner sleeve inside pipe wall
Effect.Therefore, the utility model substantially improves the influent stream condition before impeller under low flow rate condition, completely eliminates axial-flow pump water
Power is unstable " saddle area ", has effectively widened the safe and stable operation condition range of axial-flow pump.Simple structure of the present utility model
And easy processing makes, it is adaptable to any kind of axial-flow pump.
Brief description of the drawings
Fig. 1 is structural profile schematic diagram of the present utility model；
Fig. 2 is structure top view of the present utility model；
Fig. 3 is cross-section structure scale diagrams of the present utility model；
Fig. 4 is planar structure scale diagrams of the present utility model；
Fig. 5 is the assembling schematic diagram of the utility model embodiment；
Fig. 6 is using the axial-flow pump hydraulic performance comparison diagram before and after the utility model.
Specific embodiment
The utility model is described in detail in embodiment below in conjunction with the accompanying drawings.
As illustrated, the utility model is related to outer tube 1, suction flange 2, outlet(discharge) flange 3, inner sleeve 4, gusset 5, disappear whirlpool
The technical characteristics such as plate 6, impeller 7, blade wheel chamber 8, blade wheel chamber's suction flange 9, wheel hub 10, pump shaft 11.
As depicted in figs. 1 and 2, a kind of axial-flow pump water feed apparatus, including outer tube 1, the two ends of outer tube 1 are respectively import
End and the port of export, port of export outer wall are provided with outlet(discharge) flange 3, and the port of export of outer tube 1 leads to the entrance point of axial-flow pump impeller room
Outlet(discharge) flange 3 is crossed to connect, and the port of export of outer tube 1 diameter D be equal to axial-flow pump impeller room entrance point diameter；
The entrance point outer wall of outer tube 1 is provided with suction flange 2, and the entrance point of outer tube 1 can pass through with inlet channel
Suction flange 2 is connected；
Inner sleeve 4 is provided with outer tube 1, there is gap between inner sleeve 4 and outer tube 1, muscle is provided with the gap
, with outer tube 1 be fixedly connected inner sleeve 4 by gusset 5 by plate 5, and the whirlpool plate 6 that disappears is provided with the inwall of inner sleeve 4.
Outer tube 1, suction flange 2, outlet(discharge) flange 3, inner sleeve 4, gusset 5 and the whirlpool plate 6 that disappears can be using metal material, modelings
Material material or pmma material processing and fabricating.
The structure and position dimension of outer tube 1, inner sleeve 4, gusset 5 and the whirlpool plate 6 that disappears are used to the outlet diameter of outer tube 1
Relative value on the basis of D is represented, is applied by these relative values are multiplied by into the outlet diameter D of outer tube 1 of the present utility model
Actual size.
As shown in Figure 3 and Figure 4, outer tube 1 is the pyramidal structure with identical taper, entrance point diameter with inner sleeve 4
It is big compared with the port of export.The cone angle of outer tube 1 is 5~60 °, inlet diameter D1 is 1.05~5D, and height H is 0.05~3D；Outer tube
Import open can use, can be also connected by flange with inlet channel；Suction flange 2 is uniformly distributed along the circumference 4~12 screws, goes out
Mouthful flange 3 is uniformly distributed along the circumference 4~12 screws；Inner sleeve 4 is positioned at the inside of outer tube 1 and both surfaces are parallel, institute's shape
Into gap vertical range T1 be 0.005~0.1D；The inlet side of inner sleeve 4 and the inlet side flush of outer tube 1；Inner sleeve
4 outlet is in the outlet higher than outer tube 1；The import and export side of inner sleeve 4 carries out rounding to reduce water impact loss；
The thickness T3 of inner sleeve 4 is 0.001~0.01D；The outer wall of inner sleeve 4 is with the inwall of outer tube 1 by uniform cloth in the circumferential direction
4~6 gussets 5 put are connected；The import and export side of gusset 5 carries out rounding treatment to reduce water impact loss；Gusset 5
Width T2 is 0.001~0.005D；The length of gusset is equal with the inwall bus length of outer tube, is L1；The inwall of inner sleeve 4
Upper 6~18 evenly distributed in the circumferential direction whirlpool plates 6 that disappear；The corresponding angle θ in a circumferential direction of whirlpool plate 6 that disappears is 5~20 °；Disappear
The length of whirlpool plate is equal with the bus length of inner sleeve inside pipe wall, is L2, and the thickness T4 of the whirlpool plate that disappears is 0.01~0.2D.
Embodiment 1
As shown in figure 5, wherein, outer tube 1 is connected through outlet(discharge) flange 3 with blade wheel chamber suction flange 9, outer tube inlet diameter
D is equal to the inlet diameter 290mm of blade wheel chamber 8, the cone angle of outer tube 1 is 15 °, be highly 230mm, inlet diameter be 350mm, outward
Sleeve pipe suction flange is connected with inlet channel, and inner sleeve 4 is 5mm and by the uniform gusset 5 of 4 circumferences with the spacing of outer tube 1
Connection, the thickness of inner sleeve 4 is 1.2mm, and the width of gusset 5 is 2mm, and 12 whirlpool plates 6 that disappear are evenly distributed on inner sleeve inside pipe wall, and disappear whirlpool
The corresponding angle in a circumferential direction of plate 6 is 10 °, thickness is 10mm, and inner sleeve is 8mm with the inlet side distance of impeller blade.
As shown in fig. 6, using Three Dimensional Flow Simulation method, comparative analysis is using the axial-flow pump before and after the utility model
Device hydraulic performance curve can be found that：Taper water feed apparatus of the present utility model can eliminate shakiness in axial-flow pump hydraulic performance
Fixed " saddle area ", thereby may be ensured that axial-flow pump stable operation under full flow operating mode, and the safety for effectively widening axial-flow pump is steady
Determine operating condition interval.
Claims (9)
1. a kind of axial-flow pump water feed apparatus, it is characterized in that：Including outer tube (1), the two ends of outer tube (1) be respectively entrance point and
The port of export, port of export outer wall is provided with outlet(discharge) flange (3), and the port of export of outer tube (1) leads to the entrance point of axial-flow pump impeller room
Cross outlet(discharge) flange (3) connection, and outer tube (1) port of export diameter D be equal to axial-flow pump impeller room entrance point diameter；
The entrance point outer wall of outer tube (1) is provided with suction flange (2), and the entrance point of outer tube (1) can be logical with inlet channel
Cross suction flange (2) connection；
Inner sleeve (4) is provided with outer tube (1), there is gap between inner sleeve (4) and outer tube (1), set in the gap
There is gusset (5), inner sleeve (4) is fixedly connected with outer tube (1) by gusset (5), the whirlpool that disappears is provided with inner sleeve (4) inwall
Plate (6).
2. axial-flow pump water feed apparatus according to claim 1, it is characterized in that：Outer tube (1) is with inner sleeve (4) to be had
The pyramidal structure of identical taper, entrance point diameter is big compared with the port of export.
3. axial-flow pump water feed apparatus according to claim 2, it is characterized in that：The cone angle of outer tube (1) is 5~60 °, height
It is 0.05~3D, a diameter of 1.05~5D of outer tube (1) entrance point.
4. axial-flow pump water feed apparatus according to claim 3, it is characterized in that：The thickness of the inner sleeve (4) be 0.001~
0.01D, inner sleeve (4) is 0.005~0.1D with outer tube (1) spacing.
5. axial-flow pump water feed apparatus according to claim 2, it is characterized in that：The entrance point and overcoat of the inner sleeve (4)
The entrance point for managing (1) is concordant, and the port of export of inner sleeve (4) is higher than the port of export of outer tube (1), outer tube (1) and axial-flow pump leaf
After engineer room connection, the port of export of inner sleeve (4) is at impeller leaf top；The import and export end of the inner sleeve (4) is rounding and sets
Meter.
6. axial-flow pump water feed apparatus according to claim 2, it is characterized in that：Whirlpool plate (6) circumference uniform distribution disappear in inner sleeve (4)
Inwall on, the whirlpool plate (6) that disappears is sector structure, and the angle of two sides is 5~20 ° on circumferencial direction；The length of said vortex reducing plate (6)
Degree is equal with the bus length of inner sleeve inside pipe wall, and the thickness of the whirlpool plate (6) that disappears is 0.01~0.2D.
7. axial-flow pump water feed apparatus according to claim 1, it is characterized in that：The suction flange (2) is uniformly distributed along the circumference 4~
12 screws.
8. axial-flow pump water feed apparatus according to claim 1, it is characterized in that：The outlet(discharge) flange (3) is uniformly distributed along the circumference 4~
12 screws.
9. axial-flow pump water feed apparatus according to claim 1, it is characterized in that：The width of the gusset (5) be 0.001~
0.005D, the length of gusset (5) is equal with the bus length of outer tube (1) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621308765.2U CN206221381U (en) | 2016-12-01 | 2016-12-01 | A kind of axial-flow pump water feed apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621308765.2U CN206221381U (en) | 2016-12-01 | 2016-12-01 | A kind of axial-flow pump water feed apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206221381U true CN206221381U (en) | 2017-06-06 |
Family
ID=58784096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621308765.2U Expired - Fee Related CN206221381U (en) | 2016-12-01 | 2016-12-01 | A kind of axial-flow pump water feed apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206221381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640769A (en) * | 2016-12-01 | 2017-05-10 | 河海大学 | Conical water inflow device for improving instability hydraulic characteristic of axial flow pump |
-
2016
- 2016-12-01 CN CN201621308765.2U patent/CN206221381U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640769A (en) * | 2016-12-01 | 2017-05-10 | 河海大学 | Conical water inflow device for improving instability hydraulic characteristic of axial flow 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: 20170606 Termination date: 20211201 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |