CN201546966U - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
CN201546966U
CN201546966U CN2009202008892U CN200920200889U CN201546966U CN 201546966 U CN201546966 U CN 201546966U CN 2009202008892 U CN2009202008892 U CN 2009202008892U CN 200920200889 U CN200920200889 U CN 200920200889U CN 201546966 U CN201546966 U CN 201546966U
Authority
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 - Lifetime
Application number
CN2009202008892U
Other languages
Chinese (zh)
Inventor
张生昌
张华军
张金海
邓鸿英
张鹤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University of Technology ZJUT
Original Assignee
Zhejiang University of Technology ZJUT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University of Technology ZJUT filed Critical Zhejiang University of Technology ZJUT
Priority to CN2009202008892U priority Critical patent/CN201546966U/en
Application granted granted Critical
Publication of CN201546966U publication Critical patent/CN201546966U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

A centrifugal pump, comprises an impeller, a shaft, an inhaling chamber, a spiral case and a nut, wherein, the inhaling chamber is connected with an inlet of the impeller, a conveying liquid flows into the impeller, the impeller is mounted in a spiral case and fastened on the shaft, a balancing hole for balancing the axial force is arranged on a contact-making surface of the impeller and the shaft, the rear portion of the balancing hole is an inlet, which is disposed on the back side of a root of the impeller, the outlet of the balancing hole is arranged at the liquid inlet, the front portion of the balancing hole is in a foldback shape, so that the outlet direction is equal to the flow direction of the liquid inlet. The utility model has the beneficial effects that the operation efficiency of the centrifugal pump can be improved, the cavitation performance and the waterpower efficiency of the centrifugal pump can be improved, and the centrifugal pump has good economic benefit.

Description

Centrifugal pump
Technical field
The utility model 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 utility model 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.
The technical solution of the utility model:
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 utility model 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 utility model has changed the flow direction of reflux stream in the equalizing orifice by L type back-up ring simultaneously, 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 beneficial effects of the utility model: 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 the utility model equalizing orifice;
Fig. 2 is the utility model equalizing orifice section configuration schematic representation;
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 utility model 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 utility model has changed the flow direction of reflux stream in the equalizing orifice 4 by L type back-up ring 5 simultaneously, 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 model utility design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reach in those skilled in the art according to the utility model design 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.
CN2009202008892U 2009-11-26 2009-11-26 Centrifugal pump Expired - Lifetime CN201546966U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202008892U CN201546966U (en) 2009-11-26 2009-11-26 Centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202008892U CN201546966U (en) 2009-11-26 2009-11-26 Centrifugal pump

Publications (1)

Publication Number Publication Date
CN201546966U true CN201546966U (en) 2010-08-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009202008892U Expired - Lifetime CN201546966U (en) 2009-11-26 2009-11-26 Centrifugal pump

Country Status (1)

Country Link
CN (1) CN201546966U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101718282B (en) * 2009-11-26 2011-04-13 浙江工业大学 Centrifugal pump
CN103277334A (en) * 2013-06-04 2013-09-04 江苏大学 Axial force balance device for centrifugal residual heat removal pump for nuclear power
KR20140108389A (en) * 2013-02-26 2014-09-11 현대중공업 주식회사 Centrifugal pump having balancing holes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101718282B (en) * 2009-11-26 2011-04-13 浙江工业大学 Centrifugal pump
KR20140108389A (en) * 2013-02-26 2014-09-11 현대중공업 주식회사 Centrifugal pump having balancing holes
CN103277334A (en) * 2013-06-04 2013-09-04 江苏大学 Axial force balance device for centrifugal residual heat removal pump for nuclear power
CN103277334B (en) * 2013-06-04 2016-05-25 江苏大学 A kind of nuclear power goes out balance unit for pump axial force with centrifugal type residual hot type

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20100811

Effective date of abandoning: 20091126