CN206397809U - A kind of multistage blade centrifugal pump impeller - Google Patents

A kind of multistage blade centrifugal pump impeller Download PDF

Info

Publication number
CN206397809U
CN206397809U CN201621231913.5U CN201621231913U CN206397809U CN 206397809 U CN206397809 U CN 206397809U CN 201621231913 U CN201621231913 U CN 201621231913U CN 206397809 U CN206397809 U CN 206397809U
Authority
CN
China
Prior art keywords
blade
inner ring
outer ring
impeller
centrifugal pump
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
CN201621231913.5U
Other languages
Chinese (zh)
Inventor
朱荣生
陈铭
杨爱玲
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.)
Jiangsu Guoquan Pumps Co Ltd
Original Assignee
Jiangsu Guoquan Pumps Co Ltd
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 Jiangsu Guoquan Pumps Co Ltd filed Critical Jiangsu Guoquan Pumps Co Ltd
Priority to CN201621231913.5U priority Critical patent/CN206397809U/en
Application granted granted Critical
Publication of CN206397809U publication Critical patent/CN206397809U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The utility model provides a kind of multistage blade centrifugal pump impeller, and its anti-cavitation performance is improved to improve flow field, it is characterised in that:(1) there is inner ring blade and outer ring blade, inner ring blade is distributed with outer ring spacing with blades.(2) adjacent blades interval angles differ 10~20 degree on circumference.(3) 50~60 degree of inner ring subtended angle of blade, 60~70 degree of outer ring subtended angle of blade.(4) inner ring blade both sides are thin, thick middle, middle thicker than both sides by 1/3rd.Outer ring vane inlet is thin, and outlet is thick, exports thicker than import by 1/2nd.

Description

A kind of multistage blade centrifugal pump impeller
Technical field
The present invention requires higher working environment suitable for anti-cavitation.
Background technology
If pressure in liquid less than some on the occasion of, then the continuity of flowing will be destroyed, the one of liquid It will appear from a large amount of minute bubbles, bubble being liquid vapour or being previously dissolved in the gas of liquid in a little regions, this phenomenon is referred to as Cavitation.The cavitation for being reduced by local pressure and being produced, its vacuole flows with liquid, when vacuole flow to the higher region of pressure When, vacuole will crumble and fall.The physical phenomenon of a series of complex can occur after bubble collapse, such as vacuole is attached in impeller channel wall Closely crumble and fall, the liquid around vacuole will continuously hit the surface of impeller channel with high frequency, surfacing then because being hit, Fatigue and peel off.It is this due to the breakoff phenomenon referred to as cavitation corrosion crumbled and fall to wetted surfaces material of vacuole.
The energy exchange of liquid is interfered and destroyed when cavitation corrosion occurring in impeller of pump, cause pump operation characteristic change, A series of problems, such as vibration and noise, when serious liquid stream in pump can interrupt, it is impossible to work.Cavitation and cavitation corrosion nascent in pump, The vacuole of generation is less, and the normal work to pump simultaneously has no significant effect.But when cavitation develops to a certain extent, liquid in impeller Energy exchange will it is significantly affected and destruction, flow, lift, efficiency and the shaft power of pump have unexpected decline. When the cavitation of pump fully develops, effective area of passage of liquid stream can be reduced a lot, so that cause liquid stream to stop, and at this moment pump is not just Can normal work.Cavitation erosion substantially reduces overhaul life and the service life of pump.
The Chinese invention patent that Application No. 201510679202.8 discloses a kind of high anti-cavitation centrifugal impeller waterpower Design method, this design method is by improving the import laying angle of blade, vane thickness distribution, impeller inlet diameter and leaf Piece entrance width, can reduce the degree of crook of blade, increase the area of passage of vane inlet, improve the efficiency of centrifugal pump, Cavitation surplus is reduced, and cavitation performance is improved.Impeller channel is made to design subtended angle of blade by different leaves number and specific speed Interior flowing diffusion is reduced, and flowing is reduced because the whirlpool of the separation of flow spreads to high-pressure side closer to blade shape.But it is above-mentioned special Basic structure of the parameter description not to vane pump is only referred in profit to optimize.
For above-mentioned defect, the main anti-cavitation performance that centrifugal pump is improved by using multistage blade of the present invention.
The content of the invention
The purpose of the present invention is that multistage blade is installed in impeller, and its anti-cavitation performance, its feature are improved to improve flow field It is:
(1) there is inner ring blade and outer ring blade, inner ring blade is distributed with outer ring spacing with blades.The outlet of inner ring blade is straight Footpath is equal to the inlet diameter of outer ring blade.
(2) there are 3 inner ring blades and 3 outer ring blades.Adjacent blades interval angles differ 10~20 degree on circumference.
(3) 50~60 degree of inner ring subtended angle of blade, 60~70 degree of outer ring subtended angle of blade.
(4) inner ring blade both sides are thin, thick middle, middle thicker than both sides by 1/3rd.Outer ring vane inlet is thin, and outlet is thick, Outlet is thicker than import by 1/2nd.
Brief description of the drawings
Fig. 1 is impeller blade front view;
Fig. 2 is impeller blade axial plane figure;
Embodiment
The present invention mainly improves vane pump anti-cavitation performance by the change to impeller blade this body structure, slows down leaf The cavitation of piece.
This embodiment is that on the basis of original vane pump is given, the cavitation surplus NPSHr of vane pump is improved:
Fig. 1 and Fig. 2 combination define the present embodiment:
1st, the impeller includes inner ring blade 1 and outer ring blade 2.
2nd, with outer ring blade and inner ring blade, inner ring blade is distributed with outer ring spacing with blades.The outlet of inner ring blade is straight Footpath is equal to the inlet diameter of outer ring blade.
3rd, with 3 inner ring blades and 3 outer ring blades.Adjacent blades interval angles differ 10~20 degree on circumference.
4th, 50~60 degree of inner ring subtended angle of blade, 60~70 degree of outer ring subtended angle of blade.
5th, inner ring blade both sides are thin, thick middle, middle thicker than both sides by 1/3rd.Outer ring vane inlet is thin, and outlet is thick, goes out Mouth is thicker than import by 1/2nd.

Claims (5)

1. a kind of multistage blade centrifugal pump impeller, the impeller is main by inner ring blade (1), outer ring blade (2), front shroud of impeller (3), back shroud of impeller (4) is constituted, and it is mainly characterized by:Transform inner ring blade (1), the structure of outer ring blade (2) of vane pump To increase vane pump inlet pressure, prevent impeller inlet hypotony from causing cavitation at import, and change impeller internal blade knot Structure carries out prevention runner interior cavitation.
2. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that:With inner ring blade and outer ring blade, Inner ring blade is distributed with outer ring spacing with blades.
3. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that:Adjacent blades interval angles phase on circumference Poor 10~20 degree.
4. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that:50~60 degree of inner ring subtended angle of blade, outside Enclose 60~70 degree of subtended angle of blade.
5. multistage blade centrifugal pump impeller according to claim 1, it is characterized in that:Inner ring blade both sides are thin, thick middle, in Between it is thicker than both sides by 1/3rd or so, outer ring vane inlet is thin, and outlet is thick, exports thicker than import by 1/2nd or so.
CN201621231913.5U 2016-11-17 2016-11-17 A kind of multistage blade centrifugal pump impeller Expired - Fee Related CN206397809U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621231913.5U CN206397809U (en) 2016-11-17 2016-11-17 A kind of multistage blade centrifugal pump impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621231913.5U CN206397809U (en) 2016-11-17 2016-11-17 A kind of multistage blade centrifugal pump impeller

Publications (1)

Publication Number Publication Date
CN206397809U true CN206397809U (en) 2017-08-11

Family

ID=59508887

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621231913.5U Expired - Fee Related CN206397809U (en) 2016-11-17 2016-11-17 A kind of multistage blade centrifugal pump impeller

Country Status (1)

Country Link
CN (1) CN206397809U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852937A (en) * 2020-06-02 2020-10-30 江苏大学 Centrifugal cavitation pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852937A (en) * 2020-06-02 2020-10-30 江苏大学 Centrifugal cavitation pump
CN111852937B (en) * 2020-06-02 2022-01-11 江苏大学 Centrifugal cavitation pump

Similar Documents

Publication Publication Date Title
CN107503978A (en) A kind of high-lift higher specific speed mixed-flow pump
CN202348689U (en) Self-priming pump for deep well
CN109026830B (en) Centrifugal impeller
CN210290254U (en) Centrifugal impeller with splitter blades
CN105275880B (en) A kind of mixed-flow core main pump
CN206397809U (en) A kind of multistage blade centrifugal pump impeller
CN204663967U (en) The multistage centrifugal pump impeller that a kind of and radial stator mates
CN103615392B (en) A kind of uniform pitch pulp pump and impeller Hydraulic Design Method thereof
CN112648230B (en) High-efficiency cavitation-resistant centrifugal pump impeller
CN105864099B (en) A kind of design method of middle higher specific speed centrifugal pump impeller port of export edge folding blades structure
CN205714923U (en) A kind of diagonal pumps
CN210534779U (en) Impeller for inhibiting back cavitation of pump impeller blade
CN204099272U (en) A kind of low specific-speed centrifugal pump impeller
CN203009310U (en) Cavitation-resistant type vane pump
CN102182519B (en) Self-jet flow secondary flow control structure of turbine stator vane
CN108019374B (en) Asymmetric impeller for centrifugal pump
CN203670222U (en) Full-lift self-priming pump
CN206487678U (en) A kind of low NPSHr vane pumps
CN203476786U (en) Axial flow pump impeller with vane end edge ribs
CN104929973A (en) Multiple-stage centrifugal pump impeller matched with radial guide vane
CN206360924U (en) A kind of centrifugal pump impeller
CN203035616U (en) Pumping chamber for volute mixed-flow pump
CN102392831A (en) Swept-curved blade for high-speed fuel oil axial-flow pump
CN106593955B (en) A kind of mixed-flow core main pump
CN203627241U (en) Uniform pitch pulp pump

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170811

Termination date: 20191117

CF01 Termination of patent right due to non-payment of annual fee