CN106122084A - A kind of low specific speed impeller structure and processing method thereof - Google Patents
A kind of low specific speed impeller structure and processing method thereof Download PDFInfo
- Publication number
- CN106122084A CN106122084A CN201610745190.9A CN201610745190A CN106122084A CN 106122084 A CN106122084 A CN 106122084A CN 201610745190 A CN201610745190 A CN 201610745190A CN 106122084 A CN106122084 A CN 106122084A
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- China
- Prior art keywords
- blade
- root
- impeller
- ring portion
- front shroud
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2233—Construction and assembly entirely open or stamped from one sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of low specific speed impeller structure and processing method thereof, this structure includes impeller body and blade root；Described impeller body includes front shroud, blade body and back shroud, described blade root includes wheel hub, root of blade and seals ring portion, formation sleeve is protruded at the middle part of described back shroud backward, back shroud is located at the rear portion of wheel hub by this casing pipe sleeve, described front shroud is set in sealing ring portion, and and seal formation circular weld between ring portion, this front shroud is connected together by circular weld seal weld with sealing ring portion；Its processing method includes: 1) difference casting impeller body and blade root；2) from the rear end of blade root, impeller body being inserted in blade root, front shroud is inserted in sealing ring portion；3) front shroud is welded with the circular weld sealing sealed between ring portion.Difficulty of processing of the present invention is low, and machining accuracy is high, and total quality is more preferable, thus improves the yield rate of processing；And the stability of impeller is high, it is possible to be effectively improved water conservancy diversion efficiency.
Description
Technical field
The present invention relates to centrifugal pump impeller and manufacture field, particularly relate to a kind of ultra-low specific speed blade wheel structure and processing side thereof
Method.
Background technology
Along with energy-saving and environmental protection, the raising of safety requirements, the centrifugal pump application of low-specific-speed is more and more, and for impeller
Specific speed less than 35 time, impeller as shown in Figure 1, when D2(impeller outer diameter) with b2(runner exit width) ratio more than 30 time,
The foundry engieering that this kind of double shrouded wheel is present is it is difficult to ensure that the dimensional accuracy of runner and surface smoothness, and scrappage is the highest by (one
As be only capable of reaching the qualification rate of about 20%), even cannot cast, limit the further development of super-low specific speed centrifugal pump.
At present, manufacturing this kind of impeller, see Fig. 1, front shroud is individually processed by general employing, the blade of impeller and bonnet
Plate, wheel hub cast (or processing) molding together, then front shroud and back shroud are welded and are integrally formed impeller, this molding
The method of impeller, has weld seam, and weld seam is the least between front shroud and blade, their bond strength is low；Particularly work as leaf
When being relatively large in diameter (i.e. the value of D2/b2 is more than 30) of wheel, blade cannot weld with the middle part of front shroud at all, now overall
The intensity of impeller is lower, and the weld bead height of welding impeller cannot accurately control, it is impossible to reaches the requirement of the Hydraulic Design size, it is impossible to
Ensure that the hydraulic performance of impeller realizes；Further, between blade and front shroud, there is gap, huge on the impact of impeller hydraulic performance.With
Time welding impeller cannot solve in special material (dual phase steel, non-ferrous metal etc.) solder technology, the heat affected area leaf of welding is to gold
The corrosivity belonged to declines the biggest, it is impossible to ensures the life-time service of impeller, brings hidden danger to equipment safety operation.
Summary of the invention
For deficiencies of the prior art, it is an object of the invention to provide a kind of ultra-low specific speed blade wheel structure
And processing method, difficulty of processing is low, and machining accuracy is high, and total quality is more preferable, thus improves the yield rate of processing；And
And the stability of impeller is high, it is possible to be effectively improved water conservancy diversion efficiency.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is such that a kind of low specific speed impeller knot
Structure, it is characterised in that: include impeller body and blade root；Described impeller body includes front shroud, blade body and bonnet
Plate, and described front shroud, blade body and back shroud be molded as one；Described blade root include wheel hub, root of blade with
And sealing ring portion, described root of blade is positioned at the front portion of wheel hub, and described sealing ring portion is set in outside root of blade, and wheel hub,
Root of blade and sealing ring portion are one-body molded；
Formation sleeve is protruded at the middle part of described back shroud backward, and back shroud is located at the rear portion of wheel hub by this casing pipe sleeve, and with
Wheel hub interference fit together, and be close to wheel hub front portion by back shroud；Meanwhile, the outer end of root of blade can be with blade body
The inner fits tightly；Described front shroud is set in sealing ring portion, and and seals formation circular weld, this front shroud between ring portion
It is connected together by circular weld seal weld with sealing ring portion.
Further, described blade root with the segmentation principle of impeller body is: root of blade is segmental arc, blade body
For straightway；The diameter of the endoporus of front shroud is consistent with the inner place diameter of a circle of blade body, the diameter of bore of back shroud
Inner place diameter of a circle less than blade body.
Further, front shroud endoporus is tapered, and it is more than near front shroud outside diameter near front shroud outside diameter.
A kind of processing method of above-mentioned low specific speed impeller structure, it is characterised in that: comprise the steps:
1) according to the Hydraulic Design requirement, casting impeller body and blade root respectively；
2) by the sleeve pipe on impeller body, impeller body is inserted in blade root from the rear end of blade root, and makes blade body
Portion is the most right with root of blade, and blade body the inner is close together with root of blade outer end, meanwhile, makes the bonnet of impeller body
The front portion of plate and blade root is close to, and front shroud is inserted in sealing ring portion；
3) front shroud is welded with the circular weld sealing sealed between ring portion.
Compared with prior art, present invention have the advantage that
1, the ultra-low specific speed impeller of extremely difficult casting is cut into two parts to cast respectively, is substantially reduced the casting of impeller
Difficulty, is substantially reduced the percent defective of blank.
2, the impeller body cast respectively, blade body therein is substantially Cylindrical Blade, and molding difficulty is low, runner and leaf
The molded line dimensional accuracy of sheet body is prone to ensure, makes the size of runner and blade body molded line more meet design requirement.
3, blade root belongs to impeller channel turning and leaf curling part, and this structure has shortened molding runners and blade root
The length in portion, makes the sand bond forming runner during casting good simultaneously, and easy molding, root of blade line style and channel size more hold
Easily reach to design requirement.
4, impeller is separated from the runner turning site being easiest to occur defect, form two individual components and add respectively
Work, reduces the casting difficulty of runner, overcomes factor defect occur, makes the yield rate of impeller be greatly improved.
5, the flow channel length of impeller body and blade root shortens the most significantly, it is possible to use the method for manual polishing to reduce leaf
Wheel runner surface roughness, extremely advantageous to the fineness improving runner and blade surface, reduce fluid high-speed and flow through blade
The friction loss on surface, effectively improves the efficiency of impeller.
6, the front shroud circular weld of impeller shapes, and is substantially reduced the difficulty of volume flaw detection, the matter of impeller can be effectively ensured
Amount, reduces the pump accident risk that Impeller Mass causes, and improves pump operation reliability.
7, use this technology, can be centrifugal with the casting impeller external diameter impeller the biggest with the value of the ratio of runner exit width
Pump develops the protection of the aspect that develops skill to ultra-low specific speed direction.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing impeller.
Fig. 2 is the structural representation of the present invention.
Fig. 3 be Fig. 2 along A A to sectional view.
Fig. 4 is the structural representation of impeller body.
Fig. 5 be Fig. 4 along A A to sectional view.
Fig. 6 is the structural representation of blade root.
Fig. 7 be Fig. 6 along A A to sectional view.
In Fig. 2 Fig. 4: 1 front shroud, 2 blade bodies, 3 back shrouds, 4 wheel hubs, 5 roots of blade, 6 is close
Seal ring portion, 7 sleeve pipes.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment: seeing Fig. 2 Fig. 7, a kind of low specific speed impeller structure, including impeller body and blade root.Described
Impeller body includes front shroud 1, blade body 2 and back shroud 3, and described front shroud 1, blade body 2 and back shroud 3 become
Type is integrated.Described blade root includes wheel hub 4, root of blade 5 and seals ring portion 6, and described root of blade 5 is positioned at wheel hub 4
Front portion, described sealing ring portion 6 is set in outside root of blade 5, and wheel hub 4, root of blade 5 and seal ring portion 6 one become
Type.Described blade root with the segmentation principle of impeller body is: root of blade 5 is segmental arc, and blade body 2 is straightway；Before
The diameter of the endoporus of cover plate 1 is consistent with the inner place diameter of a circle of blade body 2, and the diameter of bore of back shroud 3 is less than blade
The inner place diameter of a circle of body 2.
Formation sleeve 7 is protruded at the middle part of described back shroud 3 backward, and back shroud 3 is set in wheel hub 4 by this sleeve pipe 7
Rear portion, and together with wheel hub 4 interference fit, and back shroud 3 is close to wheel hub 4 front portion.Meanwhile, the outer end energy of root of blade 5
Enough the inners with blade body 2 fit tightly, and form the vane type line of design, and the moment of torsion of axle passes to impeller hub 4 by key,
The sleeve pipe 7 of impeller body transmits moment of torsion with the interference fit at wheel hub 4 rear portion.Described front shroud 1 is set in sealing ring portion 6, and
And sealing and form circular weld between ring portion 6, this front shroud 1 is connected together by circular weld seal weld with sealing ring portion 6.Its
In, front shroud 1 endoporus is tapered, and it is more than near front shroud 1 outside diameter (that is: front shroud 1 near front shroud 1 outside diameter
The contour line of endoporus otch becomes 0 °～60 ° of angles with the axial line of impeller)；So that weld seam is wedge shaped, welding of being more convenient for.
Impeller body and blade root casting respectively, from the angle of casting, can shorten molten iron in forming process
Flow distance, reduce impeller molding difficulty, it is ensured that the size of impeller channel size and blade more meets with design load, it is possible to
It is effectively improved the efficiency of impeller water conservancy diversion.By split casting molding, then it is combined into after processing and meets the impeller that design requires, leaf
There is not gap between the front shroud 1 of wheel and blade, degree of accuracy is high.Blade divides two sections of castings, and front shroud 1 uses ring with sealing ring portion 6
Weld seam is welded into entirety；Can more preferably control welding quality and be readily inspected the quality of weld seam, the cover plate better quality of impeller stress,
Thus improve the yield rate of impeller；Meanwhile, the moment of torsion of axle passes to impeller body by the wheel hub 4 of cast-in-block blade root
Portion, in impeller running, stability is high.
A kind of processing method of above-mentioned low specific speed impeller structure, it is characterised in that: comprise the steps:
1) according to hydraulic engineering design requirement, casting impeller body and blade root respectively；And to runner and blade (blade body 2 He
Root of blade 5) surface polishes.Wherein, root of blade 5 is segmental arc, and blade body 2 is straightway；The endoporus of front shroud 1
Diameter consistent with the inner place diameter of a circle of blade body 2, the diameter of bore of back shroud 3 is less than the inner of blade body 2
Protrude backward in the middle part of place diameter of a circle, and back shroud 3 and form sleeve pipe 7.
2) by the sleeve pipe 7 on impeller body, impeller body is inserted in blade root from the rear end of blade root, and makes leaf
Sheet body 2 is the most right with root of blade 5, and blade body 2 the inner is close together with root of blade 5 outer end, meanwhile, makes impeller body
The back shroud 3 in portion is close to the front portion of blade root, and front shroud 1 is inserted in sealing ring portion 6.
3) front shroud 1 is welded with the circular weld sealing sealed between ring portion 6, form a complete impeller.
It is last it should be noted that above example is only in order to illustrate technical scheme rather than restriction technologies side
Case, it will be understood by those within the art that, technical scheme is modified or equivalent by those, and
Without departing from objective and the scope of the technical program, all should contain in the middle of scope of the presently claimed invention.
Claims (4)
1. a low specific speed impeller structure, it is characterised in that: include impeller body and blade root；Described impeller body includes
Front shroud, blade body and back shroud, and described front shroud, blade body and back shroud be molded as one；Described impeller
Root includes wheel hub, root of blade and seals ring portion, and described root of blade is positioned at the front portion of wheel hub, and described sealing ring portion is sheathed
Outside root of blade, and wheel hub, root of blade and sealing ring portion are one-body molded；
Formation sleeve is protruded at the middle part of described back shroud backward, and back shroud is located at the rear portion of wheel hub by this casing pipe sleeve, and with
Wheel hub interference fit together, and be close to wheel hub front portion by back shroud；Meanwhile, the outer end of root of blade can be with blade body
The inner fits tightly；Described front shroud is set in sealing ring portion, and and seals formation circular weld, this front shroud between ring portion
It is connected together by circular weld seal weld with sealing ring portion.
A kind of low specific speed impeller structure the most according to claim 1, it is characterised in that: described root of blade is arc
Section, blade body is straightway；The diameter of the endoporus of front shroud is consistent with the inner place diameter of a circle of blade body, back shroud
Diameter of bore less than the inner place diameter of a circle of blade body.
A kind of low specific speed impeller structure the most according to claim 1, it is characterised in that: front shroud endoporus is tapered, its
Near front shroud outside diameter more than near front shroud outside diameter.
4. the processing method of a low specific speed impeller structure as claimed in claim 1, it is characterised in that: include walking as follows
Rapid:
1) according to hydraulic engineering design requirement, casting impeller body and blade root respectively；
2) by the sleeve pipe on impeller body, impeller body is inserted in blade root from the rear end of blade root, and makes blade body
Portion is the most right with root of blade, and blade body the inner is close together with root of blade outer end, meanwhile, makes the bonnet of impeller body
The front portion of plate and blade root is close to, and front shroud is inserted in sealing ring portion；
3) front shroud is welded with the circular weld sealing sealed between ring portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610745190.9A CN106122084B (en) | 2016-08-29 | 2016-08-29 | A kind of low specific speed impeller structure and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610745190.9A CN106122084B (en) | 2016-08-29 | 2016-08-29 | A kind of low specific speed impeller structure and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106122084A true CN106122084A (en) | 2016-11-16 |
| CN106122084B CN106122084B (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610745190.9A Active CN106122084B (en) | 2016-08-29 | 2016-08-29 | A kind of low specific speed impeller structure and its processing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355418A (en) * | 2017-09-01 | 2017-11-17 | 海城三鱼泵业有限公司 | A kind of low-specific-speed stainless steel punching stretch welded-type impeller and its technique |
| CN108561327A (en) * | 2018-04-09 | 2018-09-21 | 张家港市海工船舶机械制造有限公司 | A kind of double shrouded wheel and its manufacturing method |
| CN111673385A (en) * | 2020-06-15 | 2020-09-18 | 阳信东泰精密金属有限公司 | Production method of closed impeller |
| CN112549570A (en) * | 2019-09-25 | 2021-03-26 | 协磁股份有限公司 | Method for manufacturing three-dimensional plastic impeller of centrifugal pump and structure thereof |
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| CN2069501U (en) * | 1990-04-29 | 1991-01-16 | 重庆钢都机修厂 | Vane wheel for big centrifugal blower |
| CN2308742Y (en) * | 1997-07-21 | 1999-02-24 | 沈阳市中兴钛制设备厂 | Ti welded centrifugal pump |
| US20040241000A1 (en) * | 2001-10-05 | 2004-12-02 | Godichon Alain Francois Emile | Centrifugal wheel |
| CN201582191U (en) * | 2009-12-01 | 2010-09-15 | 上海连成（集团）有限公司 | Novel structure of low-specific speed impeller |
| US20130272895A1 (en) * | 2011-02-24 | 2013-10-17 | Akihiro Nakaniwa | Impeller, rotor comprising same, and impeller manufacturing method |
| CN205918638U (en) * | 2016-08-29 | 2017-02-01 | 重庆水泵厂有限责任公司 | Low specific speed impeller structure |
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2016
- 2016-08-29 CN CN201610745190.9A patent/CN106122084B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069501U (en) * | 1990-04-29 | 1991-01-16 | 重庆钢都机修厂 | Vane wheel for big centrifugal blower |
| CN2308742Y (en) * | 1997-07-21 | 1999-02-24 | 沈阳市中兴钛制设备厂 | Ti welded centrifugal pump |
| US20040241000A1 (en) * | 2001-10-05 | 2004-12-02 | Godichon Alain Francois Emile | Centrifugal wheel |
| CN201582191U (en) * | 2009-12-01 | 2010-09-15 | 上海连成（集团）有限公司 | Novel structure of low-specific speed impeller |
| US20130272895A1 (en) * | 2011-02-24 | 2013-10-17 | Akihiro Nakaniwa | Impeller, rotor comprising same, and impeller manufacturing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355418A (en) * | 2017-09-01 | 2017-11-17 | 海城三鱼泵业有限公司 | A kind of low-specific-speed stainless steel punching stretch welded-type impeller and its technique |
| CN108561327A (en) * | 2018-04-09 | 2018-09-21 | 张家港市海工船舶机械制造有限公司 | A kind of double shrouded wheel and its manufacturing method |
| CN112549570A (en) * | 2019-09-25 | 2021-03-26 | 协磁股份有限公司 | Method for manufacturing three-dimensional plastic impeller of centrifugal pump and structure thereof |
| CN112549570B (en) * | 2019-09-25 | 2022-10-14 | 协磁股份有限公司 | Method for manufacturing three-dimensional plastic impeller of centrifugal pump and structure thereof |
| CN111673385A (en) * | 2020-06-15 | 2020-09-18 | 阳信东泰精密金属有限公司 | Production method of closed impeller |
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| Publication number | Publication date |
|---|---|
| CN106122084B (en) | 2019-04-23 |
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