CN103143900A - Welding manufacture process method for pump wheel of vertical shaft single-stage and single-suction centrifugal large-sized water pump - Google Patents
Welding manufacture process method for pump wheel of vertical shaft single-stage and single-suction centrifugal large-sized water pump Download PDFInfo
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- CN103143900A CN103143900A CN2013101113784A CN201310111378A CN103143900A CN 103143900 A CN103143900 A CN 103143900A CN 2013101113784 A CN2013101113784 A CN 2013101113784A CN 201310111378 A CN201310111378 A CN 201310111378A CN 103143900 A CN103143900 A CN 103143900A
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Abstract
The invention relates to an advanced process method capable of ensuring the welding manufacture quality of a pump wheel of a vertical shaft single-stage and single-suction centrifugal large-sized water pump. The advanced process method belongs to the fundamental innovation on an assembly welding process of a large-sized water pump and belongs to the essential change on the manufacture method. When the process method provided by the invention is used, the integral assembly size of the pump wheel can be ensured during the first assembly. Outer rings of a lower ring and an upper crown are removed, conditions are created for the welding of welding seams at the water inlet edge of the pump wheel, and the welding seams which cannot be welded before can be welded. The process method has the advantages that an integral assembly three-time dismounting and mounting assembly welding process is adopted for replacing the original integral assembly welding process method, the welding reachability can be greatly improved, the welding seam quality of the pump wheel is ensured, the critical dimension stability of the pump wheel is ensured, and the assembly welding quality of the large-sized pump wheel is obviously improved.
Description
Technical field
The present invention relates to a kind of welding method of manufacturing technology of producing the centrifugal large pump pump impeller of vertical shaft one step single sucking.
Background technology
Produced the water pump pump impeller in the past and be medium-sized and small-sized pump impeller, it is simple in structure, and the leaf curling degree is less, and assembling and welding difficulty are little.For large-scale high-lift pump impeller, due to the specific (special) requirements of hydraulic performance to its structure, leaf curling is serious, opening is very little, assembly difficulty is large, and blade and crown, lower interannular weld seam access for welding are not good, take traditional erection welding technology can't complete the manufacturing.
The content of invention
The invention provides a kind of tolerance of the centrifugal large pump pump impeller of vertical shaft one step single sucking and a kind of erection welding method of manufacturing technology of quality of guaranteeing.Technical scheme of the present invention is: 1) according to drawing requirement, use the method for casting and processing to make ring and lower ring outer shroud in the interior ring of crown, crown outer shroud, lower ring, pump impeller blade uses the forging compression molding to add the method making of numerical control processing; 2) once assembling: according to drawing requirement, ring and outer shroud in crown are assembled together; The crown inversion is lain against on platform interior ring and the outer shroud of assembling blade, lower ring; 3) remove: after the adjustment size satisfies drawing requirement, remove the outer shroud of crown and the outer shroud of lower ring; 4) once welding and polishing: wear the weld seam of ring in the interior ring of axle welding blade and crown, lower ring, the polishing welding seams fillet; 5) secondary assembling: according to drawing requirement, assembling crown outer shroud; 6) secondary welding and polishing: wear the weld seam of axle welding blade and crown outer shroud, the weld seam between welding crown inner and outer ring, polishing welding seams fillet; 7) three assemblings: according to drawing requirement, the lower ring outer shroud of assembling; 8) three welding: wear the weld seam of axle welding blade and lower ring outer shroud, the weld seam between the lower ring inner and outer ring of welding; 9) cleaning: the spatter that the cleaning welding produces; 10) corase grind: fillet and the flow-passing surface of corase grind blade and crown, lower girth joint; 11) stress relief annealing: require to carry out stress relief annealing according to annealing process; 12) correct grinding: fillet and the flow-passing surface of correct grinding blade and crown, lower girth joint.
The pump impeller of water pump generally is comprised of crown, lower ring and pump impeller blade.For guaranteeing the resistant to rust ability of pump impeller, above-mentioned three kinds of parts are generally made by stainless steel.Crown, lower ring are generally cast steel, are processed into the drawing requirement size after casting; Pump impeller blade is generally made by steel plate, cast steel or forged steel, is processed into the figure paper size after getting the raw materials ready.
The present invention is applicable to the centrifugal large pump pump impeller of large-sized vertical shaft one step single sucking.For the centrifugal large pump pump impeller of large-sized vertical shaft one step single sucking, the traditional handicraft method can't guarantee access for welding and welding quality.According to process in the past, the crown of pump impeller, lower ring are overall structure, whole erection welding.But along with the significantly raising of pump head and power, the blade twist angle increases, and open height is minimum, and as according to traditional process, between crown, lower ring and blade, weld seam can't all be completed, and welding quality is difficult to guarantee.
The present invention is the basic innovation on large pump erection welding process, is in essence change on manufacture method.Use process of the present invention, the whole fitted position of pump impeller can be guaranteed when assembling for the first time.The dismounting of crown, lower ring outer shroud has been created condition for the welding of pump impeller blade water inlet side weld seam, the weld seam that originally can't weld is become feasible.
The present invention adopts the erection welding process of three dismounting of whole assembling to replace original whole assembling welding technique, access for welding is significantly improved, guaranteed the quality of pump impeller weld seam, guaranteed pump impeller critical size stability, large-scale pump impeller erection welding quality obviously promotes.
Description of drawings
Fig. 1 is the structural representation of the centrifugal large pump pump impeller of vertical shaft one step single sucking.
Fig. 2 is the process schematic diagram of the centrifugal large pump pump impeller of vertical shaft one step single sucking.
The specific embodiment
The invention provides a kind of tolerance of the centrifugal large pump pump impeller of vertical shaft one step single sucking and a kind of erection welding method of manufacturing technology of quality of guaranteeing.Technical scheme of the present invention is:
1) according to drawing requirement, use the method for casting and processing to make ring and lower ring outer shroud in the interior ring of crown, crown outer shroud, lower ring, pump impeller blade uses the forging compression molding to add the method making of numerical control processing;
2) once assembling: according to drawing requirement, ring and outer shroud in crown are assembled together; The crown inversion is lain against on platform interior ring and the outer shroud of assembling blade, lower ring;
3) remove: after the adjustment size satisfies drawing requirement, remove the outer shroud of crown and the outer shroud of lower ring;
4) once welding and polishing: wear the weld seam of ring in the interior ring of axle welding blade and crown, lower ring, the polishing welding seams fillet;
5) secondary assembling: according to drawing requirement, assembling crown outer shroud;
6) secondary welding and polishing: wear the weld seam of axle welding blade and crown outer shroud, the weld seam between welding crown inner and outer ring, polishing welding seams fillet;
7) three assemblings: according to drawing requirement, the lower ring outer shroud of assembling;
8) three welding: wear the weld seam of axle welding blade and lower ring outer shroud, the weld seam between the lower ring inner and outer ring of welding;
9) cleaning: the spatter that the cleaning welding produces;
10) corase grind: fillet and the flow-passing surface of corase grind blade and crown, lower girth joint;
11) stress relief annealing: require to carry out stress relief annealing according to annealing process;
12) correct grinding: fillet and the flow-passing surface of correct grinding blade and crown, lower girth joint.
Be illustrated in figure 1 as the centrifugal large pump pump impeller of vertical shaft one step single sucking structural representation, whole pump impeller by encircle 1 in crown, ring 5 forms in crown outer shroud 2, pump impeller blade 3, lower ring outer shroud 4 and lower ring.
Be illustrated in figure 2 as process principle schematic of the present invention.For guarantee to encircle in blade 3 and crown 1, the weld seam accessibility of ring 5 in lower ring, when the above-mentioned weld seam of welding, without crown outer shroud 2 and lower ring outer shroud 4.
Need with equipment:
Welding specific purpose tool axle
Gas metal-arc welder
The 2000t hydraulic press
Tape measure
Attachment strap, bolt
Bright light torch
The blade forming mould
Blade tempering Special support instrument
Annealing furnace
Runner bucket is imported and exported angle and is checked model and sample plate frame
The concrete technology step:
Get the raw materials ready, according to drawing requirement, use the method for casting and processing to make crown (interior ring and outer shroud) and lower ring (interior ring and outer shroud);
The annealing furnace heating is put in blade compression molding, blade, programming rate (40 ℃～60 ℃)/hour, be heated to 1100 ℃, be incubated 140 minutes, die mould.After blade placing is good; drive patrix with the hydraulic press maximum pressure and slowly press to matched moulds; then patrix lifts 10mm; descend again press-fitting mould; repeat operation twice, water flowing cooled blade after the peripheral temperature of blade reaches 800 ℃ is when blade is cooling in mould; pressure is as far as possible constant, and minimum pressure remains 800t.When blade pressure was cooled to 300 ℃, with the maximum pressure pressurization, when blade was cooling in mould, pressure remained unchanged hydraulic press as far as possible again, and maximum pressure keeps 1200t, until the blade peripheral temperature reaches room temperature;
Blade tempering and processing, blade stands up in stove, is positioned on the Special support instrument, temperature is 630 ℃, be incubated cooling in air after 140 minutes, programming rate (40 ℃～60 ℃)/hour; Blade is carried out blasting treatment, and scale removal turns processing;
Once assembling: according to drawing requirement, ring, crown outer shroud in crown are assembled together the leveling crown, assemble in order blade, in the lower ring of assembling, ring, outer shroud, adjust size until qualified, check runner import and export angle, ring in ring, lower ring in crown is firm with the blade joint welding;
Remove: remove crown outer shroud and lower ring outer shroud; Assembling blade openings anti-deformation instrument 1 cover;
Once welding and polishing: will weld specific purpose tool axle and pump impeller and be assembled together, put tool spindle is sleeping, ring in the welding crown, lower ring be interior encircle and blade between weld seam, the polishing welding seams fillet;
The secondary assembling: once after the welding, assembling crown outer shroud is adjusted the qualified rear joint welding of size firm; Erection welding anti-deformation instrument 1 cover;
Secondary welding and polishing: ring and outer ring weld in the weld seam of welding blade and crown outer shroud, crown, polishing welding seams fillet;
Three assemblings: after secondary welding, the lower ring outer shroud of assembling is adjusted the qualified rear joint welding of size firm;
Three welding: the weld seam of welding blade and lower ring outer shroud, the weld seam between the lower ring inner and outer ring of welding;
Cleaning: the spatter on the cleaning flow-passing surface;
Corase grind: polishing welding seams fillet;
Stress relief annealing: require to carry out stress relief annealing according to annealing process;
Correct grinding: fillet and the flow-passing surface of correct grinding blade and crown, lower girth joint.
The present invention is the basic innovation on large pump erection welding process, is in essence change on manufacture method.The process program that in the present invention, three assemblings of pump impeller is welded for three times is first Application, creates according to this pump impeller structure.Use process of the present invention, the whole fitted position of pump impeller can be guaranteed when assembling for the first time.The dismounting of crown, lower ring outer shroud has been created condition for the welding of pump impeller blade water inlet side weld seam, the weld seam that originally can't weld is become feasible.The use of 2 cover anti-deformation instruments has overcome the problem of the annular strain under, the crown of string between pump impeller welding process Leaf.
The present invention adopts the erection welding process of three dismounting of whole assembling to replace original whole assembling welding technique, access for welding is significantly improved, guaranteed the quality of pump impeller weld seam, guaranteed pump impeller critical size stability, large-scale pump impeller erection welding quality obviously promotes.
Claims (1)
1. the welding method of manufacturing technology of the centrifugal large pump pump impeller of vertical shaft one step single sucking is characterized in that:
1) according to drawing requirement, use the method for casting and processing to make ring and lower ring outer shroud in the interior ring of crown, crown outer shroud, lower ring, pump impeller blade uses the forging compression molding to add the method making of numerical control processing;
2) once assembling: according to drawing requirement, ring and outer shroud in crown are assembled together; The crown inversion is lain against on platform ring and lower ring outer shroud in assembling blade, lower ring;
3) remove: after the adjustment size satisfies drawing requirement, remove crown outer shroud and lower ring outer shroud;
4) once welding and polishing: wear the weld seam of ring in the interior ring of axle welding blade and crown, lower ring, the polishing welding seams fillet;
5) secondary assembling: according to drawing requirement, assembling crown outer shroud;
6) secondary welding and polishing: wear the weld seam of axle welding blade and crown outer shroud, the weld seam between welding crown inner and outer ring, polishing welding seams fillet;
7) three assemblings: according to drawing requirement, the lower ring outer shroud of assembling;
8) three welding: wear the weld seam of axle welding blade and lower ring outer shroud, the weld seam between the lower ring inner and outer ring of welding;
9) cleaning: the spatter that the cleaning welding produces;
10) corase grind: fillet and the flow-passing surface of corase grind blade and crown, lower girth joint;
11) stress relief annealing: require to carry out stress relief annealing according to annealing process;
12) correct grinding: fillet and the flow-passing surface of correct grinding blade and crown, lower girth joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310111378.4A CN103143900B (en) | 2013-04-02 | 2013-04-02 | Welding manufacture process method for pump wheel of vertical shaft single-stage and single-suction centrifugal large-sized water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310111378.4A CN103143900B (en) | 2013-04-02 | 2013-04-02 | Welding manufacture process method for pump wheel of vertical shaft single-stage and single-suction centrifugal large-sized water pump |
Publications (2)
| Publication Number | Publication Date |
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| CN103143900A true CN103143900A (en) | 2013-06-12 |
| CN103143900B CN103143900B (en) | 2015-06-24 |
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| CN201310111378.4A Active CN103143900B (en) | 2013-04-02 | 2013-04-02 | Welding manufacture process method for pump wheel of vertical shaft single-stage and single-suction centrifugal large-sized water pump |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201981A (en) * | 2017-07-21 | 2017-09-26 | 河南瑞发水电设备有限责任公司 | Mixed-flow minute diameter long-short blade rotating wheel and its manufacturing process |
| CN108035833A (en) * | 2017-12-08 | 2018-05-15 | 重庆水轮机厂有限责任公司 | A kind of hydraulic turbine low specific-speed mixed-flow minor diameter manufacturing of runner method |
| CN113601058A (en) * | 2021-09-03 | 2021-11-05 | 东芝水电设备（杭州）有限公司 | Method for welding long and short blade rotating wheels of pumped storage unit |
| CN113898606A (en) * | 2021-09-16 | 2022-01-07 | 无锡新高金属制造有限公司 | Welding manufacturing process of centrifugal large-scale water pump impeller |
| CN114012342A (en) * | 2021-12-10 | 2022-02-08 | 东方电气集团东方电机有限公司 | Water turbine runner positioning and welding method based on wedge-shaped auxiliary device |
| CN116079194A (en) * | 2023-03-23 | 2023-05-09 | 哈尔滨电机厂有限责任公司 | Narrow-gap gas shielded welding auxiliary pumping and storage runner split-ring assembly welding method |
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| US5538395A (en) * | 1993-03-25 | 1996-07-23 | Ozen S.A. | Thermoplastic pump rotor |
| EP1533104A2 (en) * | 2003-11-21 | 2005-05-25 | Siemens Aktiengesellschaft | Process for manufacturing a rotor for a centrifugal pump |
| CN101406977A (en) * | 2008-11-25 | 2009-04-15 | 北京二七轨道交通装备有限责任公司 | Vacuum brazing method for pump impeller |
| CN101793264A (en) * | 2010-04-28 | 2010-08-04 | 自贡市红旗泵业密封件制造有限公司 | Method for manufacturing impeller of desulphurization circulating pump |
| CN102364083A (en) * | 2011-07-01 | 2012-02-29 | 哈尔滨电机厂有限责任公司 | Long-short blade rotating wheel for mixed flow pump turbine |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5538395A (en) * | 1993-03-25 | 1996-07-23 | Ozen S.A. | Thermoplastic pump rotor |
| EP1533104A2 (en) * | 2003-11-21 | 2005-05-25 | Siemens Aktiengesellschaft | Process for manufacturing a rotor for a centrifugal pump |
| CN101406977A (en) * | 2008-11-25 | 2009-04-15 | 北京二七轨道交通装备有限责任公司 | Vacuum brazing method for pump impeller |
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| CN102364083A (en) * | 2011-07-01 | 2012-02-29 | 哈尔滨电机厂有限责任公司 | Long-short blade rotating wheel for mixed flow pump turbine |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201981A (en) * | 2017-07-21 | 2017-09-26 | 河南瑞发水电设备有限责任公司 | Mixed-flow minute diameter long-short blade rotating wheel and its manufacturing process |
| CN108035833A (en) * | 2017-12-08 | 2018-05-15 | 重庆水轮机厂有限责任公司 | A kind of hydraulic turbine low specific-speed mixed-flow minor diameter manufacturing of runner method |
| CN113601058A (en) * | 2021-09-03 | 2021-11-05 | 东芝水电设备（杭州）有限公司 | Method for welding long and short blade rotating wheels of pumped storage unit |
| CN113898606A (en) * | 2021-09-16 | 2022-01-07 | 无锡新高金属制造有限公司 | Welding manufacturing process of centrifugal large-scale water pump impeller |
| CN114012342A (en) * | 2021-12-10 | 2022-02-08 | 东方电气集团东方电机有限公司 | Water turbine runner positioning and welding method based on wedge-shaped auxiliary device |
| CN114012342B (en) * | 2021-12-10 | 2023-05-26 | 东方电气集团东方电机有限公司 | Water turbine runner positioning and welding method based on wedge-shaped auxiliary device |
| CN116079194A (en) * | 2023-03-23 | 2023-05-09 | 哈尔滨电机厂有限责任公司 | Narrow-gap gas shielded welding auxiliary pumping and storage runner split-ring assembly welding method |
| CN116079194B (en) * | 2023-03-23 | 2023-09-19 | 哈尔滨电机厂有限责任公司 | Narrow-gap gas shielded welding auxiliary pumping and storage runner split-ring assembly welding method |
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| CN103143900B (en) | 2015-06-24 |
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