CN204284003U - A kind of axial-flow pump of pump case band groove - Google Patents
A kind of axial-flow pump of pump case band groove Download PDFInfo
- Publication number
- CN204284003U CN204284003U CN201420616219.XU CN201420616219U CN204284003U CN 204284003 U CN204284003 U CN 204284003U CN 201420616219 U CN201420616219 U CN 201420616219U CN 204284003 U CN204284003 U CN 204284003U
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- pump
- water
- groove
- axial
- water pump
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Abstract
An axial-flow pump for pump case band groove, belongs to pump technology field.Comprise the water pump of pump case, impeller hub, water pump blade formation, the pump shaft be connected with water pump vane wheel hub, be connected to the horn mouth of water pump pump case import, the diffuser shell be connected with water pump casing outlet, groove is provided with in described pump case, groove is axially evenly distributed on pump case entrance point inwall, and be provided with crosswise commutator lug in described horn mouth, commutator lug section is streamlined.The utility model improves from axial-flow pump structural design, by arranging groove in inside pump casing, in horn mouth, commutator lug is set, cut off the passage of circumferential flow velocity, reduce the space of lateral flow, effectively can suppress the circumferential flow velocity of pump inlet current under low flow rate condition, improve water feeding of water pump condition, reach " secondary back " that occur in control pump, reduce range of instability scope, improve the stability of water pump operation and the object of Security.
Description
Technical field
The utility model relates to the axial flow pump structure of a kind of water pump structure, particularly pump case band groove, belongs to pump technology field.
Background technique
Axial-flow pump is a kind of pump-type conventional in Hydraulic and Hydro-Power Engineering, is characterized in that flow is large, lift is low, has the multiple installation approach such as vertical, horizontal, inclined, through-flow.Axial-flow pump is when flow is 0, and air horsepower reaches maximum value, is about the 2-3 of rated power doubly, even higher; Along with the progressively increase of pump duty, its lift declines thereupon, water pump operation starts to enter range of instability, there is the situation of the corresponding several flow of a lift, i.e. so-called " saddle area ", there is " secondary back " in impeller internal, and import circumference flow velocity strengthens, the energy characteristics of pump and Cavitation are deteriorated, and affect the safety and stability of water pump operation.In actual pump station engineering, often there is rated lift and the most high-lift situation about differing greatly.People wish to ensure that the efficiency under design conditions is high, ensure the safe operation of the most high-lift middle energy again.In super highest water level on records situation, desirably axial-flow pump can in larger range of lift safety and stability, thus control and reduce the range of instability of axial-flow pump by every means, reduce the impact that safe operation is caused.
Model utility content
The purpose of this utility model is the deficiency for existing axial-flow pump, by arranging groove in inside pump casing, in horn mouth, commutator lug is set, the circumferential flow velocity of pump inlet current under suppression low flow rate condition, improve water feeding of water pump condition, " secondary back " that can effectively occur in control pump, reduces the scope of range of instability, thus improves stability and the Security of water pump operation.
The purpose of this utility model realizes like this, a kind of axial-flow pump of pump case band groove, comprise the water pump of pump case, impeller hub, water pump blade formation, the pump shaft be connected with water pump vane wheel hub, is connected to the horn mouth of water pump pump case import, the diffuser shell be connected with water pump casing outlet, it is characterized in that, be provided with groove in described pump case, groove is axially evenly distributed on pump case entrance point inwall, be provided with crosswise commutator lug in described horn mouth, commutator lug section is streamlined.
Described groove is cuboid, the ratio H/D=0.7-1.1% of depth H and impeller diameter D, and the ratio W/D=3.6-5.4% of width W and impeller diameter D, the length that crosses of groove and blade is about 0.5 times of the projected length of blade on axial plane.
Described commutator lug is metal construction, and front shape is large knife-like, and commutator lug and horn mouth integral precision casting are processed into.
Described impeller hub is connected with pump shaft by key, impeller hub top is cylindric, bottom is mated with water guide cone nut and is connected, water guide cone nut is provided with internal thread and is connected with pump shaft end screw-thread fit, it is streamlined that water guide cone nut side and impeller hub periphery form semiellipse, cylindric impeller hub installed fixing slurry type water pump blade.
The axial-flow pump of a kind of pump case band groove of the utility model design, improve from its structural design, by arranging groove in inside pump casing, commutator lug being set in horn mouth, cutting off the passage of circumferential flow velocity, reduce the space of lateral flow, effectively can suppress the circumferential flow velocity of pump inlet current under low flow rate condition, improve water feeding of water pump condition, reach " secondary back " that occur in control pump, reduce range of instability, improve the stability of water pump operation and the object of Security.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that A-A in Fig. 1 is to sectional view.
Fig. 3 is that B-B in Fig. 1 is to sectional view.
Fig. 4 is that C-C in Fig. 1 is to sectional view.
In figure: 1. water guide cone nut; 2. key; 3. impeller hub; 4. horn mouth; 5. groove; 6. water pump blade; 7. pump case; 8. diffuser shell; 9. guide vane; 10. stator wheel hub; 11. bearings; 12. water guide cones; 13. pump shafts; 14. commutator lugs.
There is mode of execution
An axial-flow pump for pump case band groove, is installed by water guide cone nut 1, key 2, impeller hub 3, horn mouth 4, water pump blade 6, pump case 7, diffuser shell 8, guide vane 9, stator wheel hub 10, bearing 11, water guide cone 12, pump shaft 13 etc. and forms.Pump case is sleeved on impeller hub 3, and diffuser shell 8 is sleeved on stator wheel hub 10, and water pump blade 6 to be arranged on impeller hub 3, and guide vane 9 is arranged on stator wheel hub 10.Pump case is connected with horn mouth, diffuser shell by flange, and inside pump casing is barrel-shaped.Be provided with groove 5 in pump case, groove is axially evenly distributed on pump case entrance point inwall, and be provided with crosswise commutator lug 14 in described horn mouth, commutator lug section is streamlined.Described groove is cuboid, the ratio H/D=0.7-1.1% of depth H and impeller diameter D, and the ratio W/D=3.6-5.4% of width W and impeller diameter D, the length that crosses of groove and blade is about 0.5 times of the projected length of blade on axial plane.Commutator lug is metal construction, and front shape is large knife-like, and commutator lug and horn mouth integral precision casting are processed into.Pump shaft, through water guide cone, stator wheel hub, impeller hub, is connected with impeller hub by key, and supporting is arranged on the bearing in stator wheel hub, and water guide cone nut is provided with internal thread, and pump shaft end is connected with water guide cone nut by screw-thread fit.Impeller hub top is cylindric, and bottom is mated with water guide cone nut and connected, and it is streamlined that water guide cone nut side and impeller hub periphery form semiellipse, cylindric impeller hub installed fixing slurry type water pump blade.
Current enter from horn mouth, stream commutator lug, enter the space between water guide cone nut, the outside of impeller hub and pump case, pump shaft rotates, water pump blade is driven to rotate acting, kinetic energy and potential energy that transformation of energy is water, enter the space between diffuser shell, stator wheel hub, flow out after streaming guide vane, water guide cone.
Claims (4)
1. the axial-flow pump of a pump case band groove, comprise the water pump of pump case, impeller hub, water pump blade formation, the pump shaft be connected with water pump vane wheel hub, be connected to the horn mouth of water pump pump case import, the diffuser shell be connected with water pump casing outlet, is characterized in that, groove is provided with in described pump case, groove is axially evenly distributed on pump case entrance point inwall, and be provided with crosswise commutator lug in described horn mouth, commutator lug section is streamlined.
2. the axial-flow pump of a kind of pump case band groove according to claim 1, it is characterized in that, described groove is cuboid, the ratio H/D=0.7-1.1% of depth H and impeller diameter D, the ratio W/D=3.6-5.4% of width W and impeller diameter D, the length that crosses of groove and blade is about 0.5 times of the projected length of blade on axial plane.
3. the axial-flow pump of a kind of pump case band groove according to claim 1, it is characterized in that, described commutator lug is metal construction, and front shape is large knife-like, and commutator lug and horn mouth integral precision casting are processed into.
4. the axial-flow pump of a kind of pump case band groove according to claim 1, it is characterized in that, described impeller hub is connected with pump shaft by key, impeller hub top is cylindric, bottom is mated with water guide cone nut and is connected, water guide cone nut is provided with internal thread and is connected with pump shaft end screw-thread fit, and it is streamlined that water guide cone nut side and impeller hub periphery form semiellipse, cylindric impeller hub installed fixing slurry type water pump blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420616219.XU CN204284003U (en) | 2014-10-23 | 2014-10-23 | A kind of axial-flow pump of pump case band groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420616219.XU CN204284003U (en) | 2014-10-23 | 2014-10-23 | A kind of axial-flow pump of pump case band groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204284003U true CN204284003U (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420616219.XU Expired - Fee Related CN204284003U (en) | 2014-10-23 | 2014-10-23 | A kind of axial-flow pump of pump case band groove |
Country Status (1)
| Country | Link |
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| CN (1) | CN204284003U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912847A (en) * | 2015-05-07 | 2015-09-16 | 安徽三联泵业股份有限公司 | Water inlet suction section part of vertical type pump |
| CN107100836A (en) * | 2017-04-26 | 2017-08-29 | 哈尔滨工程大学 | A kind of Unitary Impeller is pressurized three screw pump |
| CN113859487A (en) * | 2021-09-30 | 2021-12-31 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Full-sea-depth self-adaptive pipeline and deep-sea equipment |
-
2014
- 2014-10-23 CN CN201420616219.XU patent/CN204284003U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912847A (en) * | 2015-05-07 | 2015-09-16 | 安徽三联泵业股份有限公司 | Water inlet suction section part of vertical type pump |
| CN107100836A (en) * | 2017-04-26 | 2017-08-29 | 哈尔滨工程大学 | A kind of Unitary Impeller is pressurized three screw pump |
| CN113859487A (en) * | 2021-09-30 | 2021-12-31 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Full-sea-depth self-adaptive pipeline and deep-sea equipment |
| CN113859487B (en) * | 2021-09-30 | 2024-05-03 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Full-sea-depth self-adaptive pipeline and deep sea equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20171023 |