CN204327582U - A kind of centrifugal pump low-specific speed impeller - Google Patents
A kind of centrifugal pump low-specific speed impeller Download PDFInfo
- Publication number
- CN204327582U CN204327582U CN201420776953.2U CN201420776953U CN204327582U CN 204327582 U CN204327582 U CN 204327582U CN 201420776953 U CN201420776953 U CN 201420776953U CN 204327582 U CN204327582 U CN 204327582U
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- China
- Prior art keywords
- blade
- back shroud
- impeller
- specific speed
- conical surface
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of centrifugal pump low-specific speed impeller, belongs to field of fluid machinery.Low-specific speed impeller of the present utility model, comprises back shroud and blade, and the ear end face of back shroud is the plane vertical with vane rotary axis, and the front-end face of back shroud is the conical surface becoming 82 ° ~ 87 ° of angles with vane rotary axis; The front end circumference of back shroud is distributed with blade, and the front end conical surface of blade rear end and back shroud is cast into one, and vane nose is become 8 ° to the inclined-plane of 12 ° of angles with back shroud front end conical degree of conical surface, and the vaned outermost end of institute is consistent with impeller shaft hole distance; Described blade is that linear leaf and short blade are alternately arranged, and the length of short blade is 0.75-0.85 times of linear leaf length.Impeller of the present utility model, blade is easy-rupturing not, and local losses is little, and fluid increases at the inflow-rate of water turbine of entrance, and entrance exclusion problem is resolved.
Description
Technical field
The utility model relates to a kind of centrifugal pump low-specific speed impeller, belongs to field of fluid machinery.
Background technique
Often use low specific speed horizontal centrifugal pump in industries such as electric power, chemical industry, chemical fertilizer, food, pharmacy, synthetic fiber, prismatic blade unshrouded impeller conventional in existing conventional art, as shown in Figure 1, 2, blade and wheel hub Binding distance short, easily rupture; Its blade axial height is consistent, and change from small to big from blade inlet to the area of passage the same streamline of outlet, be equivalent to fluid and flow in a diffusing tube, local losses is large; Equal length blade takes up space greatly at impeller eye place, and convection cell causes exclusion.
Summary of the invention
The purpose of this utility model there is the problems such as blade easy-rupturing, local losses are large, entrance exclusion to solve traditional prismatic blade unshrouded impeller, and provide a kind of centrifugal pump low-specific speed impeller.
The utility model is achieved through the following technical solutions:
A kind of centrifugal pump low-specific speed impeller of the present utility model, comprises back shroud and blade,
The ear end face of back shroud is the plane vertical with vane rotary axis, and the front-end face of back shroud is the conical surface becoming 82 ° ~ 87 ° of angles with vane rotary axis;
The front end circumference of back shroud is distributed with blade, and the front end conical surface of blade rear end and back shroud is cast into one, and vane nose is become 8 ° to the inclined-plane of 12 ° of angles with back shroud front end conical degree of conical surface, and the vaned outermost end of institute is consistent with impeller shaft hole distance; Described blade is that linear leaf and short blade are alternately arranged, and the length of short blade is 0.75-0.85 times of linear leaf length.
Back shroud between each short blade and impeller shaft hole has the equalizing orifice of axial aperture, for balancing the axial force that impeller produces in operation process.
All have identical arc notch between every two adjacent blades of described back shroud, reduce to the axial force that impeller produces in operation process, and then reduce the axial load factor to rolling bearing.
Beneficial effect:
The area of contact of the utility model back shroud and root of blade is large, and blade is easy-rupturing not;
The utility model blade design becomes band top rake, and local losses is little;
The utility model blade adopts length prismatic blade alternately to arrange, reduce the space that impeller eye place blade occupies, fluid increases at the inflow-rate of water turbine of entrance, and entrance exclusion problem is resolved.
Accompanying drawing explanation
Fig. 1 is the plan view of traditional prismatic blade unshrouded impeller;
Fig. 2 is the longitdinal cross-section diagram of Fig. 1;
Fig. 3 is the plan view of the utility model low-specific speed impeller;
Fig. 4 is the longitdinal cross-section diagram of Fig. 3.
Embodiment
Below in conjunction with drawings and embodiments, the utility model is described further:
Embodiment
As shown in Figure 3,4, a kind of centrifugal pump low-specific speed impeller of the present utility model, comprises back shroud and blade,
The ear end face of back shroud is the plane vertical with vane rotary axis, and the front-end face of back shroud is the conical surface becoming 85 ° of angles with vane rotary axis;
The front end circumference of back shroud is distributed with blade, and the front end conical surface of blade rear end and back shroud is cast into one, and vane nose is the inclined-plane becoming 10 ° of angles with back shroud front end conical degree of conical surface, and the vaned outermost end of institute is consistent with impeller shaft hole distance; Described blade is that linear leaf and short blade are alternately arranged, and the length of short blade is 0.8 times of linear leaf length.
Back shroud between each short blade and impeller shaft hole has the equalizing orifice of axial aperture, for balancing the axial force that impeller produces in operation process.
All have identical arc notch between every two adjacent blades of described back shroud, reduce to the axial force that impeller produces in operation process, and then reduce the axial load factor to rolling bearing.
Claims (3)
1. a centrifugal pump low-specific speed impeller, is characterized in that: comprise back shroud and blade,
The ear end face of back shroud is the plane vertical with vane rotary axis, and the front-end face of back shroud is the conical surface becoming 82 ° ~ 87 ° of angles with vane rotary axis;
The front end circumference of back shroud is distributed with blade, and the front end conical surface of blade rear end and back shroud is cast into one, and vane nose is become 8 ° to the inclined-plane of 12 ° of angles with back shroud front end conical degree of conical surface, and the vaned outermost end of institute is consistent with impeller shaft hole distance; Described blade is that linear leaf and short blade are alternately arranged, and the length of short blade is 0.75-0.85 times of linear leaf length.
2. a kind of centrifugal pump low-specific speed impeller as claimed in claim 1, is characterized in that: the equalizing orifice back shroud between each short blade and impeller shaft hole having axial aperture.
3. a kind of centrifugal pump low-specific speed impeller as claimed in claim 1 or 2, is characterized in that: all have identical arc notch between every two adjacent blades of described back shroud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420776953.2U CN204327582U (en) | 2014-12-10 | 2014-12-10 | A kind of centrifugal pump low-specific speed impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420776953.2U CN204327582U (en) | 2014-12-10 | 2014-12-10 | A kind of centrifugal pump low-specific speed impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204327582U true CN204327582U (en) | 2015-05-13 |
Family
ID=53163949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420776953.2U Expired - Fee Related CN204327582U (en) | 2014-12-10 | 2014-12-10 | A kind of centrifugal pump low-specific speed impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204327582U (en) |
-
2014
- 2014-12-10 CN CN201420776953.2U patent/CN204327582U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150513 Termination date: 20171210 |