CN101718282B - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
CN101718282B
CN101718282B CN2009101548968A CN200910154896A CN101718282B CN 101718282 B CN101718282 B CN 101718282B CN 2009101548968 A CN2009101548968 A CN 2009101548968A CN 200910154896 A CN200910154896 A CN 200910154896A CN 101718282 B CN101718282 B CN 101718282B
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CN
China
Prior art keywords
impeller
centrifugal pump
equalizing orifice
liquid
ring
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.)
Expired - Fee Related
Application number
CN2009101548968A
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Chinese (zh)
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CN101718282A (en
Inventor
张生昌
张华军
张金海
邓鸿英
张鹤
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Zhejiang University of Technology ZJUT
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Zhejiang University of Technology ZJUT
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Publication date
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Priority to CN2009101548968A priority Critical patent/CN101718282B/en
Publication of CN101718282A publication Critical patent/CN101718282A/en
Application granted granted Critical
Publication of CN101718282B publication Critical patent/CN101718282B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Centrifugal pump
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.
CN2009101548968A 2009-11-26 2009-11-26 Centrifugal pump Expired - Fee Related CN101718282B (en)

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 CN101718282A (en) 2010-06-02
CN101718282B true CN101718282B (en) 2011-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009101548968A Expired - Fee Related CN101718282B (en) 2009-11-26 2009-11-26 Centrifugal pump

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
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

Citations (5)

* Cited by examiner, † Cited by third party
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
EP1717449A2 (en) * 2005-04-29 2006-11-02 Sulzer Pumpen Ag A centrifugal pump and an impeller thereof
CN201546966U (en) * 2009-11-26 2010-08-11 浙江工业大学 Centrifugal pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
EP1717449A2 (en) * 2005-04-29 2006-11-02 Sulzer Pumpen Ag A centrifugal pump and an impeller thereof
CN201546966U (en) * 2009-11-26 2010-08-11 浙江工业大学 Centrifugal pump

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Granted publication date: 20110413

Termination date: 20161126