CN101718282A - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
- Publication number
- CN101718282A CN101718282A CN200910154896A CN200910154896A CN101718282A CN 101718282 A CN101718282 A CN 101718282A CN 200910154896 A CN200910154896 A CN 200910154896A CN 200910154896 A CN200910154896 A CN 200910154896A CN 101718282 A CN101718282 A CN 101718282A
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- China
- Prior art keywords
- impeller
- centrifugal pump
- equalizing orifice
- liquid
- ring
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Abstract
The invention relates to a centrifugal pump which comprises an impeller, a shaft, a suction chamber, a volute and a nut, wherein the suction chamber is connected at an impeller inlet, a conveying liquid flow enters into the impeller, the impeller is mounted in the volute and fastened on the shaft, a balance hole used for balancing axial force is formed on the contact surface between the impeller and the shaft, an inlet is formed at the back of the balance hole and arranged on the back surface of the root part of the impeller, and an outlet of the balance hole is formed at a liquid flow inlet; and the front part of the balance hole is in the shape of turn-back, thereby leading the direction of the outlet to be consistent with the flow direction of the liquid flow inlet. The centrifugal pump has the benefits that the centrifugal pump improves the running operation of the centrifugal pump, improves the cavitation performance of the centrifugal pump and the hydraulic efficiency and has good economic benefits.
Description
Technical field
The present invention relates to a kind of centrifugal pump.
Background technique
Centrifugal pump have performance range extensively, stability of flow, simple in structure, plurality of advantages such as running is reliable and easy to maintenance.Therefore centrifugal pump is most widely used in industrial production.Centrifugal pump axial force balance technology is the key technology of centrifugal pump, and the centrifugal pump balance of axial force is directly connected to the reliability and the life-span of centrifugal pump.
Equalizing orifice is the centrifugal pump axial force balance technology that is widely used, can active balance centrifugal pump axial force by on impeller, opening equalizing orifice, and the mechanical efficiency of centrifugal pump is improved.
Equalizing orifice is simple in structure, and is easy to process.But traditional centrifugal pump is with reference to Fig. 3, equalizing orifice 4 ' the increased internal leakage of centrifugal pump, simultaneously because equalizing orifice 4 ' interior liquid flow path direction is opposite with centrifugal pump entrance point liquid flow path direction, see Fig. 3, wherein 1 ' be impeller, 2 ' be axle, 3 ' be nut, therefore equalizing orifice 4 ' interior liquid fails to be convened for lack of a quorum pump inlet end liquid stream flow condition is produced interference, has reduced the cavitation performance and the hydraulic efficiency of centrifugal pump.From the above,, can reduce the efficient of centrifugal pump, be unfavorable for saving energy and reduce the cost though the conventional balanced hole structure can balancing axial thrust.
Summary of the invention
The axial force balance structure that the present invention will solve existing centrifugal pump can reduce centrifugal pump efficient, be unfavorable for the problem of saving energy and reduce the cost, provide a kind of both can active balance centrifugal pump axial force, efficient again, centrifugal pump reliably.
Technological scheme of the present invention:
A kind of centrifugal pump, comprise impeller, axle, suction chamber, spiral case, nut, described suction chamber is connected impeller inlet, carry liquid to flow to into impeller, described impeller is installed in the spiral case, is fastened on the axle, it is characterized in that: its equalizing orifice that is used for balancing axial thrust is arranged on the surface of contact of impeller and axle, the rear portion of described equalizing orifice is import, is located at the back side of the root of described impeller, and the outlet of described equalizing orifice is located at liquid and flows to mouth; The front portion of described equalizing orifice is the shape of turning back, and the flow direction that the direction that makes described outlet and described liquid flow to mouthful mutually forward.
Further, described nut is arrived in the front portion of described equalizing orifice, the end of described nut is provided with L type back-up ring, the wing plate of described L type back-up ring flushes with the wall that described liquid flows to mouth, described impeller is provided with the slope that flows to the flow direction of mouth along liquid near the part of the wing plate of described L type back-up ring, and the wing plate of described L type back-up ring and described slope constitute the outlet of the described equalizing orifice of following current.
Conventional centrifugal pump axial force balance hole has increased the internal leakage of centrifugal pump, liquid flow path direction in the conventional centrifugal pump axial force balance hole is opposite with centrifugal pump entrance point liquid flow path direction simultaneously, therefore the liquid in the equalizing orifice fails to be convened for lack of a quorum pump inlet end liquid stream flow condition is produced interference, reduce the cavitation performance and the hydraulic efficiency of centrifugal pump, thereby caused the decline of pump overall performance.
The present invention is in the pump operation process, and axial force that can well the equilibrium centrifugation pump can make the centrifugal pump operational efficiency higher.The present invention has simultaneously changed the flow direction of reflux stream in the equalizing orifice by L type back-up ring, make its flow direction consistent with the flow direction of pump inlet end liquid stream, eliminated the problem that conventional centrifugal pump axial force balance hole occurs, improve the cavitation performance and the hydraulic efficiency of centrifugal pump, had good economic benefit.
Beneficial effect of the present invention: improved the centrifugal pump operational efficiency, improved the cavitation performance and the hydraulic efficiency of centrifugal pump, had good economic benefit.
Description of drawings
Fig. 1 is the structural representation of equalizing orifice of the present invention;
Fig. 2 is an equalizing orifice section configuration schematic representation of the present invention;
Fig. 3 is the structural representation in conventional centrifugal pump axial force balance hole;
Embodiment
With reference to Fig. 1, Fig. 2, a kind of centrifugal pump, comprise impeller 1, axle 2, suction chamber, spiral case, nut 3, described suction chamber is connected impeller 1 import, carries liquid to flow to into impeller 1, described impeller 1 is installed in the spiral case, be fastened on the axle 2, its equalizing orifice 4 that is used for balancing axial thrust is arranged on the surface of contact of impeller 1 and axle 2, and the rear portion of described equalizing orifice 4 is imports, be located at the back side of the root of described impeller 1, the outlet of described equalizing orifice 4 is located at liquid and flows to mouth; The front portion of described equalizing orifice 4 is the shape of turning back, and the flow direction that the direction that makes described outlet and described liquid flow to mouthful mutually forward.
Described nut 3 is arrived in the front portion of described equalizing orifice 1, the end of described nut 3 is provided with L type back-up ring 5, the wing plate of described L type back-up ring 5 flushes with the wall that described liquid flows to mouth, described impeller 1 partly is provided with the slope that flows to the flow direction of mouth along liquid near the wing plate of described L type back-up ring 5, and the wing plate of described L type back-up ring 5 and described slope constitute the outlet of the described equalizing orifice 4 of following current.
The present invention is in the pump operation process, and axial force that can well the equilibrium centrifugation pump can make the centrifugal pump operational efficiency higher.The present invention has simultaneously changed the flow direction of reflux stream in the equalizing orifice 4 by L type back-up ring 5, make its flow direction consistent with the flow direction of pump inlet end liquid stream, eliminated the problem that conventional centrifugal pump axial force balance hole occurs, improve the cavitation performance and the hydraulic efficiency of centrifugal pump, had good economic benefit.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (2)
1. centrifugal pump, comprise impeller, axle, suction chamber, spiral case, nut, described suction chamber is connected impeller inlet, carry liquid to flow to into impeller, described impeller is installed in the spiral case, is fastened on the axle, it is characterized in that: its equalizing orifice that is used for balancing axial thrust is arranged on the surface of contact of impeller and axle, the rear portion of described equalizing orifice is import, is located at the back side of the root of described impeller, and the outlet of described equalizing orifice is located at liquid and flows to mouth; The front portion of described equalizing orifice is the shape of turning back, and the flow direction that the direction that makes described outlet and described liquid flow to mouthful mutually forward.
2. centrifugal pump according to claim 1, it is characterized in that: described nut is arrived in the front portion of described equalizing orifice, the end of described nut is provided with L type back-up ring, the wing plate of described L type back-up ring flushes with the wall that described liquid flows to mouth, described impeller is provided with the slope that flows to the flow direction of mouth along liquid near the part of the wing plate of described L type back-up ring, and the wing plate of described L type back-up ring and described slope constitute the outlet of the described equalizing orifice of following current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101548968A CN101718282B (en) | 2009-11-26 | 2009-11-26 | Centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101548968A CN101718282B (en) | 2009-11-26 | 2009-11-26 | Centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101718282A true CN101718282A (en) | 2010-06-02 |
| CN101718282B CN101718282B (en) | 2011-04-13 |
Family
ID=42432898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101548968A Expired - Fee Related CN101718282B (en) | 2009-11-26 | 2009-11-26 | Centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101718282B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322443A (en) * | 2011-09-08 | 2012-01-18 | 浙江工业大学 | Single-stage centrifugal pump with balanced axial force |
| CN110469539A (en) * | 2019-09-03 | 2019-11-19 | 珠海格力电器股份有限公司 | Impeller, centrifugal pump and air-conditioning |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210682U (en) * | 1986-12-29 | 1987-10-07 | 中国科学院工程热物理研究所 | Centrifugal pump |
| CN2486753Y (en) * | 2001-06-20 | 2002-04-17 | 杭州大路实业有限公司 | Magnetic force driving pump |
| CN2716548Y (en) * | 2004-06-18 | 2005-08-10 | 苏道忠 | Centrifugal pump |
| FI20050450A (en) * | 2005-04-29 | 2006-10-30 | Sulzer Pumpen Ag | Centrifugal pump and impeller |
| CN201546966U (en) * | 2009-11-26 | 2010-08-11 | 浙江工业大学 | Centrifugal pump |
-
2009
- 2009-11-26 CN CN2009101548968A patent/CN101718282B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322443A (en) * | 2011-09-08 | 2012-01-18 | 浙江工业大学 | Single-stage centrifugal pump with balanced axial force |
| CN110469539A (en) * | 2019-09-03 | 2019-11-19 | 珠海格力电器股份有限公司 | Impeller, centrifugal pump and air-conditioning |
| CN110469539B (en) * | 2019-09-03 | 2021-04-06 | 珠海格力电器股份有限公司 | Impeller, centrifugal pump and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101718282B (en) | 2011-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20110413 Termination date: 20161126 |