CN104879316B - A kind of stainless steel rushes weldering formula centrifugal pump impeller and its improves welding method - Google Patents
A kind of stainless steel rushes weldering formula centrifugal pump impeller and its improves welding method Download PDFInfo
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- CN104879316B CN104879316B CN201510246139.9A CN201510246139A CN104879316B CN 104879316 B CN104879316 B CN 104879316B CN 201510246139 A CN201510246139 A CN 201510246139A CN 104879316 B CN104879316 B CN 104879316B
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Abstract
Weldering formula centrifugal pump impeller is rushed the present invention provides a kind of stainless steel and its improves welding method, including front shroud, blade, back shroud and wheel hub, the one side that front shroud is coupled with blade is equipped with the first groove, its quantity is identical with the quantity of blade, its shape is identical with shape of the blade close to front shroud one end；The one side that back shroud is coupled with blade is equipped with the second groove, its quantity is identical with the quantity of blade, its shape is identical with shape of the blade close to back shroud one end；In welding process, blade according to impeller pattern is bonded the space curve shape at end with front shroud, back shroud, first the first groove and the second groove are stamped out respectively in front shroud, back shroud plane, blade both ends are embedded in front shroud and back shroud, so as to can be preferably bonded to each other in impeller welding, the not close phenomenon such as solder skip, welding is avoided the occurrence of, improves the intensity of impeller and the anti-cavitation performance index of centrifugal pump, and then improves the effectiveness of performance and service life of impeller.
Description
Technical field
The invention belongs to centrifuge pump technical field, the improvement that weldering formula centrifugal pump impeller is rushed more particularly, to a kind of stainless steel is welded
Method is connect, is mainly used for improving the weld strength and service life of punching weldering centrifugal pump impeller.
Background technology
Stamping-welded centrifugal pump blade is compared with casting impeller, is not integral cast, but need by impeller it is different zero
Part welds together composition impeller, therefore to be related to pressure processing, welding, heat treatment and mould etc. more for stamping-welded centrifugal pump technique
Professional cooperation, difficulty are big.At present, domestic most punch welding impellers, its front shroud all make plane, and blade is generally straight
Blade, and prismatic blade is not easy to couple with tapered front shroud upon bending, such liquid easily produces crossfire between runner, and right
The intensity of impeller produces harmful effect.
In addition, for front and rear cover plate impeller separated with blade, have to use and threaded hole use is opened on front and rear cover plate and blade
The method that holding screw is fixed, but punching weldering blade is thinner than cast blade, runner is smooth, and perforate is unrealistic, and this solid
Determining mode easily makes fluid crossfire between different runners, influences the efficiency of pump.Also have using the method directly welded, but due to
Easily there is the shortcoming such as weld crack, lack of penetration, slag inclusion, stomata and weld appearance in common welding.These shortcomings can reduce weld seam
Sectional area, reduces bearing capacity, produces stress concentration, causes crackle, reduces fatigue strength, easily causes weldment rupture to cause crisp
It is disconnected.And front shroud and the commissure of back shroud and blade generate special physicochemical change due to welding, and cause material
Performance reduce, easily corrode, when impeller works, in the event of cavitation, this corrosion can become more seriously, cause
Commissure corrosion penetrates, and crossfire is produced between runner, and the efficiency of pump drastically declines, and impeller life reduces.
Welded using traditional welding procedure there are many deficiencies, such as heat affected area and weld seam sector width are very big, blade
With cover board contraction distortion is serious, the generation of harmful residual stress, speed of welding are relatively slow, alloying element there are evaporation loss even
The failure of blade welding.Using laser welding compared with these inefficient and oxidizable welding procedures, optical fiber is stainless steel welded
Weld metal zone and heat affected area width very little, in addition, optical fiber does not lure the microhardness and tensile property higher that steel welds, and optical fiber
Laser transmission is flexible, easy to control, the position that cannot be soldered to commonly is welded in impeller internal blade and cover board, laser welding all may be used
To be soldered to.
Through retrieval, the utility model patent of Application No. CN201220645789 describes a kind of centrifugal pump impeller, protecgulum
Multiple blade grooves are evenly equipped with the medial surface of plate, location hole is provided with blade groove, is evenly equipped with the medial surface of back shroud multiple
With the corresponding blade of blade groove, it is provided with blade and the corresponding positioning column of location hole, front shroud is filled with back shroud positioning
An entirety is welded into after matching somebody with somebody.But this impeller, which is casting, to be formed, it is difficult to reality in stainless steel stamping-welded centrifugal pump field
It is existing.The patent for rushing the improved method of weldering formula centrifugal pump impeller space curve welding on stainless steel at present yet there are no relevant report.
The content of the invention
Easily there is the deficiencies of solder skip, rosin joint for front shroud, back shroud and blade weld exists in the prior art, commonly
Easily there is the defects of weld crack, lack of penetration, slag inclusion, stomata and weld appearance in welding, and the present invention provides a kind of stainless steel
The improved method for rushing the welding of weldering formula centrifugal pump impeller space curve, weldering impeller vane of centrifugal pumps front shroud and rear cover are rushed by improving
The design and manufacture of plate, are bonded end with blade by front shroud, back shroud and stamp out the groove that can be embedded in blade, blade processing mistake
Cheng Caiyong laser reinforcings and optical fiber welding procedure, make blade with occurring without above-mentioned deficiency and defect after front and rear cover plate welding fabrication.
The present invention achieves the above technical objects by the following technical means.
A kind of stainless steel rushes weldering formula centrifugal pump impeller, including front shroud, blade, back shroud and wheel hub, before the blade
End and rear end are respectively equipped with front shroud and back shroud, and the back shroud rear end is provided with wheel hub, and the front shroud is coupled with blade
One side be equipped with the first groove, the quantity of first groove is identical with the quantity of blade, the shape and leaf of first groove
Shape of the piece close to front shroud one end is identical；The one side that the back shroud is coupled with blade is equipped with the second groove, and described second is recessed
The quantity of groove is identical with the quantity of blade, and the shape of second groove is identical with shape of the blade close to back shroud one end.
Further, the blade is camber blades or cylinder prismatic blade.
Further, the depth of first groove is 0.5mm-1mm, its width is wider than blade fitting front shroud one end
Spend more 0.1mm-0.5mm.
Further, the depth of first groove is 0.5mm, its width is more than the width of blade fitting front shroud one end
0.1mm。
Further, second depth of groove is 0.5mm-1mm, its width is bonded the width of back shroud one end than blade
More 0.1mm-0.5mm.
Further, second depth of groove is 0.5mm, its width is more than the width of blade fitting back shroud one end
0.1mm。
A kind of stainless steel rushes the improvement welding method of weldering formula centrifugal pump impeller, includes the following steps：
Step A：Each parameter of impeller, including vane inlet width b are determined by velocity-coefficient method1, blade exit width b2、
Inlet blade angle laying angle β1a、β1b、β1c, outlet blade angle laying angle β2, subtended angle of blade ψ, vane thickness S1, number of blade Z, protecgulum
Plate internal diameter D1, front shroud outer diameter D2, protecgulum plate thickness S2, rear cover board diameter D3, rear cover plate thickness S3, hub diameter d and wheel hub it is thick
Spend S4；The impeller pattern is established in CAD with this；
Step B：Impeller pattern respectively obtains protecgulum Slab and end, rear cover is bonded with leaf model according to step A
Slab is bonded the shape of the space curve at end with leaf model；
Step C：The impeller pattern according to step A stamps out initial blade, the working face of initial blade and back side warp
Polishing, polish, be laser impact intensified；Washed afterwards with deionized water Cheongju, alcohol ultrasonic degreasing, obtain blade；
Step D：Protecgulum Slab is bonded the shape of the space curve at end with leaf model according to step B, in institute
State and first groove identical with blade quantity is stamped out in the plane that front shroud is coupled with blade；First depth of groove is 0.5-
1mm, its width than blade fitting front shroud one end width more than 0.1mm-0.5mm；Likewise, according to rear cover template die in step B
Type is bonded the shape of the space curve at end with leaf model, and the back shroud is stamped out the second groove, the depth of the first groove
For 0.5-1mm, its width than blade fitting back shroud one end width more than 0.1mm-0.5mm；
Step E：The both ends of blade are respectively embedded into front shroud and back shroud and fixed relative position, first by blade and rear cover
Plate laser welding, then blade and front shroud are welded, finally by wheel hub and, weldment welds；Subsequent butt welding is practiced midwifery raw weldering
Seam area is polished, is polished, is laser impact intensified, after through going to wash from sub- water Cheongju, alcohol ultrasonic degreasing, obtain impeller into
Product.
Further, laser impact intensified equipment therefor described in step C is Nd：YAG laser.
Further, laser welding equipment therefor described in step E is YLS-4000 optical fiber lasers.
Further, each parameter of impeller is as follows in step A：Vane inlet width b1=35mm, blade exit width b2=
24mm, vane inlet laying angle β1a=20 °, β1b=25 °, β1c=30 ° of blade exit laying angle β2=27 °, subtended angle of blade ψ=
130 °, vane thickness S1=3mm, number of blade Z=6, front shroud internal diameter D1=150mm, front shroud outer diameter D2=300mm, front shroud
Thickness S2=3mm, rear cover board diameter D3=300mm, rear cover plate thickness S3=3mm, hub diameter d=80mm and hub thickness S4
=6mm.
Beneficial effects of the present invention：
Stainless steel of the present invention rushes the improvement welding method of weldering formula centrifugal pump impeller, according to blade in impeller pattern with
Front shroud, the space curve shape at back shroud fitting end, in the fabrication stage of impeller, in the patch of front shroud and back shroud and blade
The first groove and the second groove are stamped out in the one side of conjunction respectively so that blade both ends can be embedded in front shroud and back shroud,
So as to welding when can preferably be bonded, avoid the occurrence of the not close phenomenon such as solder skip, welding, improve impeller intensity and
The anti-cavitation performance index of centrifugal pump is improved, and then improves the effectiveness of performance and service life of impeller.In addition, add in blade
Laser reinforcing and optical fiber welding procedure are used during work, achievees the purpose that to improve impeller blade surface strength and composite weld.
Brief description of the drawings
Fig. 1 is the structure diagram of stainless steel of the present invention punching weldering centrifugal pump impeller.
Fig. 2 is the axis projection of stainless steel of the present invention punching weldering centrifugal pump impeller.
Fig. 3 is front shroud plane figure.
Fig. 4 is back shroud plane figure.
The reference numerals are as follows：
1- front shrouds, 2- blades, 3- back shrouds, 4- wheel hubs, the first grooves of 5-, the second grooves of 6-.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
As depicted in figs. 1 and 2, a kind of stainless steel rushes weldering formula centrifugal pump impeller, including front shroud 1, blade 2,3 and of back shroud
Wheel hub 4, the front-end and back-end of the blade 2 are respectively equipped with front shroud 1 and back shroud 3, and 3 rear end of back shroud is provided with wheel hub
4, the blade 2 is camber blades or cylinder prismatic blade.
As shown in figure 3, the one side that the front shroud 1 is coupled with blade 2 is equipped with the first groove 5, the number of first groove 5
Amount is identical with the quantity of blade 2, and the shape of first groove 5 is identical with one end shape of blade 2 close to front shroud 1；It is described
The depth of first groove 5 is 0.5mm-1mm, and the width that its width is bonded 1 one end of front shroud than blade 2 has more 0.1mm-0.5mm.
As shown in figure 4, the one side that the back shroud 3 is coupled with blade 2 is equipped with the second groove 6, the quantity and blade of second groove 6
2 quantity is identical, and the shape of second groove 6 is identical with one end shape of blade 2 close to back shroud 3, second groove 6
Depth is 0.5mm-1mm, and the width that its width is bonded 3 one end of back shroud than blade 2 has more 0.1mm-0.5mm.
The improved method that a kind of stainless steel rushes the welding of weldering formula centrifugal pump impeller space curve, includes the following steps：
Step A：Each parameter of impeller, i.e. vane inlet width b are determined by velocity-coefficient method1=35mm, blade exit are wide
Spend b2=24mm, vane inlet laying angle β1a=20 °, β1b=25 °, β1c=30 ° of blade exit laying angle β2=27 °, leaf packet
Angle ψ=130 °, vane thickness S1=3mm, number of blade Z=6, front shroud internal diameter D1=150mm, front shroud outer diameter D2=300mm,
Protecgulum plate thickness S2=3mm, rear cover board diameter D3=300mm, rear cover plate thickness S3=3mm, hub diameter d=80mm and wheel hub
Thickness S4=6mm；The impeller pattern is established in CAD with this；
Step B：Impeller pattern respectively obtains protecgulum Slab and end, rear cover is bonded with leaf model according to step A
Slab is bonded the shape of the space curve at end with leaf model；
Step C：The impeller pattern punching press according to step A distorts to obtain initial blade, the blade after being distorted to punching press
Working face and the back side carry out grinding and buffing, and use Nd:YAG laser is strong using laser-impact to front side of vane and the back side
Change, finally, the blade after laser impact intensified is put into Li Shui Cheongju and washes and is put into alcohol ultrasonic degreasing.
Step D：Protecgulum Slab is bonded the shape of the space curve at end with leaf model according to step B, in institute
State first groove 5 identical with 2 quantity of blade with stamping out in the plane that blade 2 couples of front shroud 1；First groove, 5 depth is
0.5mm, the width that its width is bonded 1 one end of front shroud than blade 2 have more 0.1mm；Likewise, according to rear cover template die in step B
Type is bonded the shape of the space curve at end with leaf model, and it is 0.5mm that the back shroud 3 is also stamped with depth, and width compares leaf
The width of 3 one end of the fitting back shroud of piece 2 has more the second groove 6 of 0.1mm；
Step E：The both ends of blade 2 are respectively embedded into front shroud 1 and back shroud 3 and fixed relative position, using YLS-
4000 optical fiber lasers carry out optical-fiber laser welding to impeller.First by blade 2 and 3 laser welding of back shroud, then weld blade 2 with
Front shroud 1, finally by wheel hub 4 and weldment has welded；Subsequent butt welding raw weld metal zone of practicing midwifery is polished, is polished, and
Use Nd:YAG laser is laser impact intensified to weld metal zone progress, and is washed with deionized water Cheongju and be put into alcohol ultrasonic wave and deoiled
Dirt, obtains impeller finished product.
The embodiment is preferred embodiment of the invention, but present invention is not limited to the embodiments described above, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification belongs to protection scope of the present invention.
Claims (1)
1. a kind of stainless steel rushes the improvement welding method of weldering formula centrifugal pump impeller, it is characterised in that includes the following steps：
Step A：Each parameter of impeller, including vane inlet width b are determined by velocity-coefficient method1, blade exit width b2, blade
Inlet angle laying angle β1a、β1b、β1c, outlet blade angle laying angle β2, subtended angle of blade ψ, vane thickness S1, number of blade Z, in front shroud
Footpath D1, front shroud outer diameter D2, protecgulum plate thickness S2, rear cover board diameter D3, rear cover plate thickness S3, hub diameter d and hub thickness S4；
The impeller pattern is established in CAD with this；
Step B：The impeller pattern according to step A respectively obtains protecgulum Slab and end, rear cover template die is bonded with leaf model
Type is bonded the shape of the space curve at end with leaf model；
Step C：The impeller pattern according to step A stamps out initial blade, the working face of initial blade and the back side through polishing,
Polish, is laser impact intensified；Washed afterwards with deionized water Cheongju, alcohol ultrasonic degreasing, obtain blade (2)；
Step D：Protecgulum Slab is bonded the shape of the space curve at end with leaf model according to step B, before described
Cover board (1) first groove (5) identical with blade (2) quantity with stamping out in the plane that blade (2) couples；First groove (5)
Depth is 0.5-1mm, its width is more 0.1mm-0.5mm than the width of blade (2) fitting front shroud (1) one end；Likewise, according to
Rear cover Slab is bonded the shape of the space curve at end with leaf model in step B, and it is recessed that the back shroud (3) is stamped out second
Groove (6), the depth of the second groove (6) is 0.5-1mm, its width is more than the width of blade (2) fitting back shroud (3) one end
0.1mm-0.5mm；
Step E：The both ends of blade (2) are respectively embedded into front shroud (1) and back shroud (3) and fixed relative position, first by blade
(2) with back shroud (3) laser welding, then blade (2) and front shroud (1) are welded, finally by wheel hub (4) and weldment has welded
Come；Subsequent butt welding raw weld metal zone of practicing midwifery is polished, is polished, is laser impact intensified, after through going from sub- water Cheongju is washed, alcohol surpasses
Sound wave degreasing, obtains impeller finished product.
Laser impact intensified equipment therefor described in the step C is Nd：YAG laser.
Laser welding equipment therefor described in the step E is YLS-4000 optical fiber lasers.
Each parameter of impeller is as follows in the step A：Vane inlet width b1=35mm, blade exit width b2=24mm, blade into
Mouth laying angle β1a=20 °, β1b=25 °, β1c=30 ° of blade exit laying angle β2=27 °, subtended angle of blade ψ=130 °, blade it is thick
Spend S1=3mm, number of blade Z=6, front shroud internal diameter D1=150mm, front shroud outer diameter D2=300mm, protecgulum plate thickness S2=
3mm, rear cover board diameter D3=300mm, rear cover plate thickness S3=3mm, hub diameter d=80mm and hub thickness S4=6mm.
Wherein, step A, the stainless steel of the targeted application of B, C, D, E rush weldering formula centrifugal pump impeller include front shroud (1), blade
(2), back shroud (3) and wheel hub (4), the front-end and back-end of the blade (2) are respectively equipped with front shroud (1) and back shroud (3), institute
State back shroud (3) rear end and be provided with wheel hub (4), it is characterised in that the front shroud (1) is equipped with the one side that blade (2) couples
First groove (5), the quantity of first groove (5) is identical with the quantity of blade (2), the shape of first groove (5) with
Shape of the blade (2) close to front shroud (1) one end is identical；It is recessed that the one side that the back shroud (3) couples with blade (2) is equipped with second
Groove (6), the quantity of second groove (6) is identical with the quantity of blade (2), shape and the blade (2) of second groove (6)
Shape close to back shroud (3) one end is identical；The blade (2) is camber blades or cylinder prismatic blade；
The depth of first groove (5) is 0.5mm-1mm, its width is more than the width of blade (2) fitting front shroud (1) one end
0.1mm-0.5mm；
Second groove (6) depth is 0.5mm-1mm, its width is more than the width of blade (2) fitting back shroud (3) one end
0.1mm-0.5mm；
The depth of first groove (5) is 0.5mm, its width is more than the width of blade (2) fitting front shroud (1) one end
0.1mm；
Second groove (6) depth is 0.5mm, its width is more 0.1mm than the width of blade (2) fitting back shroud (3) one end.
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| CN106181270B (en) * | 2016-08-26 | 2018-06-08 | 常州索拉尔熔盐泵阀科技有限公司 | The preparation method of pump for liquid salts combination type blade wheel |
| CN107269578A (en) * | 2017-06-08 | 2017-10-20 | 三联泵业股份有限公司 | The welding impeller and its welding method of a kind of double entry pump of test |
| 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 |
| CN108757554A (en) * | 2018-07-25 | 2018-11-06 | 上海中韩杜科泵业制造有限公司 | A kind of water pump vane blade |
| CN108869400A (en) * | 2018-08-24 | 2018-11-23 | 浙江南元泵业有限公司 | Centrifugal pump guide vane |
| CN108895033A (en) * | 2018-08-24 | 2018-11-27 | 浙江南元泵业有限公司 | The intracorporal guide vane mechanism of blower inlet casing |
| CN113931874A (en) * | 2021-10-12 | 2022-01-14 | 广州市凯卫莎环保科技有限公司 | Impeller and processing method thereof and high-temperature centrifugal fan applying impeller |
| CN114810623B (en) * | 2022-04-16 | 2023-09-22 | 江苏大学流体机械温岭研究院 | Marsh distance-based vane pump health monitoring and evaluating method and device |
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| CN204663968U (en) * | 2015-05-14 | 2015-09-23 | 江苏大学 | A kind of stainless steel drift weldering formula centrifugal pump impeller |
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Application publication date: 20150902 Assignee: Jiangsu is a pump industry science and technology Group Co., Ltd forever Assignor: Jiangsu University Contract record no.: 2019320000078 Denomination of invention: Stainless steel pulse-welded centrifugal pump impeller and improved welding method thereof Granted publication date: 20180424 License type: Exclusive License Record date: 20190322 |
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