CN104279186A - High-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and manufacturing method - Google Patents
High-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and manufacturing method Download PDFInfo
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- CN104279186A CN104279186A CN201410473730.3A CN201410473730A CN104279186A CN 104279186 A CN104279186 A CN 104279186A CN 201410473730 A CN201410473730 A CN 201410473730A CN 104279186 A CN104279186 A CN 104279186A
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/04—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from several pieces
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
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Abstract
The invention provides a high-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and a manufacturing method. The closed ternary impeller mainly comprises a wheel cover, a wheel disc and a blade, wherein the blade is uniformly divided into two halves, one half of blade is integrally milled and formed with the wheel cover, the other half of blade is integrally milled and formed with the wheel disc, in addition, the two halves of blades are welded at a butt joint part for forming an integral blade, a groove is formed in the butt joint part of the two halves of blades, and in addition, a welding seam is formed in the middle of the whole blade after the welding. The manufacturing method comprises the following steps that the blade of the ternary impeller is uniformly divided into two parts, one half of blade is integrally milled into the wheel disc, one half of blade is integrally milled into the wheel cover, the groove is formed in the butt joint part of the two halves of the blades, in addition, the whole blade is welded after the fixation by a tooling, and the welding seam is formed in the middle of the whole blade; after the welding of the wheel cover and the wheel disc of the impeller is completed, the stress is eliminated, and the outer contour of the impeller is finely turned in the turning processing center of a numerical control machine tool after the re-installing and re-clamping; finally, the welding part of the blade is manually ground to be smooth. The ternary impeller and the manufacturing method have the characteristics that better pneumatic performance and pneumatic efficiency are realized, the processing quality is good, the impeller intensity is high, and the like.
Description
Technical field
What the present invention relates to is a kind of large discharge super-large diameter half milling half weldering enclosed 3 d impeller and manufacture method, belongs to centrifugal compressor impeller and manufacturing technology field.
Background technique
Large discharge super-large diameter half milling half weldering enclosed 3 d impeller is the acting element of centrifugal compressor, and the feature of this impeller is: leaf curling degree is large, and wheel card and shrouding disc turning surface curvature are comparatively large, and runner deviation is larger to impeller effect of aerodynamic performance.Double shrouded wheel generally comprises wheel cap, wheel disc and blade three-major-items, the enclosed 3 d impeller of small flow minor diameter can adopt overall milling or blade integral milling be covered at wheel disc or wheel, then two parts are passed through electric welding, soldering, riveted joint or compound mode connect, and the enclosed 3 d impeller of large discharge super-large diameter, because leaf curling degree is quite large, adopt the mode of three part welding to connect always, its runner relative to overall milling runner cannot ensure its accuracy, thus more or less the aeroperformance of impeller is had an impact, it is the bottleneck improving this type of impeller adiabatic efficiency.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, and a kind of conformity that can ensure processing flow channel and design molded line is provided, the quality of processing of impeller and large discharge super-large diameter half milling half weldering enclosed 3 d impeller and the manufacture method of pneumatic efficiency can be improved.
The object of the invention is to realize by following technical solution: a kind of large discharge super-large diameter half milling half weldering enclosed 3 d impeller, it mainly comprises wheel cap, wheel disc and blade, described blade is divided into two halves, wherein integrally milling is shaping for a half vane and wheel cap, integrally milling is shaping for second half blade and wheel disc, and two half vanes are by forming integral blade in joint welding.
The joint of described two half vanes offers groove, and by being formed with a weld seam after welding in the middle of whole blade.
A manufacture method for large discharge super-large diameter half described above milling half weldering enclosed 3 d impeller, this manufacture method comprises the following steps:
A) forging of hub disk and wheel cap is arranged on the turning center of numerical control machine tool respectively, semi finishing is carried out to it;
B) hub disk and wheel cap are arranged on respectively on Five-axis numerical control milling machine, are divided equally by the blade of three-dimensional flow, a half vane overall milling on the forging of wheel disc is shaping, and a half vane overall milling on the forging of wheel cap is shaping;
C) the joint groove opening of two-part blade described in step b), by wheel disc after completing, wheel cap key is located, and has corrected rear mould and has compressed, and welded all blades;
D) eliminate stress, by shaping for the external frame finish turning of impeller after welding;
E) manual grinding is carried out to smooth to the weld of blade;
In described step a), semi finishing turning is carried out to hub disk and wheel cap forging, and the machining allowance of 4-6mm will be ensured at wheel disc and wheel cap side.
In step b), the blade of described three-dimensional flow is divided into two-part, and a semi-monolithic milling is on wheel disc, and a semi-monolithic milling covers at wheel.
In described step c), at the joint groove opening of two half vanes, and after fixing by frock, whole blade is welded, in the middle of whole blade, form a weld seam.
Described step d), e) in, after the wheel cap of impeller and wheel disc have welded, eliminated stress, again after clamping in the turning center of numerical control machine tool, finish turning is carried out to the external frame of impeller; Finally that blade weld manual grinding is extremely smooth.
The half milling half weldering three-dimensional closed impeller of super-large diameter of the present invention changes traditional three-major-items welding manufacture mode, become two weld seams into a weld seam, and because weld seam is in the middle of runner, easily polish smooth, the whole numerical control milling of blade, shape and location are all very accurate, effectively reduce aerodynamical resistance; It has good aeroperformance and pneumatic efficiency, and quality of processing is good, impeller intensity high.
The present invention has following technique effect:
1, the present invention compares with traditional three-major-items Impeller Machining technique, and its runner smoother, can reduce aerodynamical resistance effectively;
2, impeller of the present invention, its runner completes to be processed by numerical control milling, can meet the requirement of Impeller Design molded line completely, have good aeroperformance and pneumatic efficiency;
3, adopt 3 d impeller of the present invention, its quality of processing is good, impeller intensity is high.
Accompanying drawing explanation
Fig. 1 is wheel member structural representation of the present invention;
Fig. 2 is one of flow chart of processing method of the present invention;
Fig. 3 is the flow chart two of processing method of the present invention;
Fig. 4 is the flow chart three of processing method of the present invention;
Fig. 5 is the flow chart four of processing method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.Shown in Fig. 1, a kind of large discharge super-large diameter half of the present invention milling half weldering enclosed 3 d impeller, it mainly comprises wheel cap b, wheel disc a and blade, described blade is divided into two halves, wherein integrally milling is shaping for a half vane and wheel cap, integrally milling is shaping for second half blade and wheel disc, and two half vanes are by forming integral blade in joint welding.
The joint of described two half vanes offers groove, and by being formed with a weld seam after welding in the middle of whole blade.
In Fig. 1, a is the hub disk part that runner has completed milling, and b is the enclosing cover for impeller part that runner has completed milling.Also have in FIG: 11 is vane rotary center, and 51 is impeller intake grill, and 52 is impeller exhaust outlet, and 53 is hub disk meridian surface shape, and 54 is enclosing cover for impeller meridian surface shape, and 55 is hub disk blade and enclosing cover for impeller blade butted line.
The manufacture method of enclosed 3 d impeller of the present invention comprises the following steps:
A) forging of hub disk and wheel cap is arranged on the turning center of numerical control machine tool respectively, semi finishing is carried out to it;
B) hub disk and wheel cap are arranged on respectively on Five-axis numerical control milling machine, are divided equally by the blade of three-dimensional flow, a half vane overall milling on the forging of wheel disc is shaping, and a half vane overall milling on the forging of wheel cap is shaping;
C) the joint groove opening of two-part blade described in step b), by wheel disc after completing, wheel cap key is located, and has corrected rear mould and has compressed, and welded all blades;
D) eliminate stress, by shaping for the external frame finish turning of impeller after welding;
E) manual grinding is carried out to smooth to the weld of blade.
Described wheel disc and wheel cover key are located by the present invention, and corrected rear mould and compressed, finally weld all blades, weld seam is in the centre of whole blade, and welding manner is manual electric arc welding.
After described wheel disc and wheel cover are welded to connect by the present invention, welding stress is eliminated in tempering, and then clamping, in the turning center of numerical control machine tool, carries out finish turning to impeller outer profile again, make its boundary dimension reach drawing requirement, finally manual grinding is carried out to smooth to blade weld.
Embodiment:
Fig. 2-5 is depicted as the flow chart of manufacture large discharge super-large diameter half of the present invention milling half weldering enclosed 3 d impeller, wherein:
As shown in Figure 2, be installed on numerical control machining center by the solid forging of wheel cap and wheel disc, carry out turning to forging, radial feed turning goes out the external frame of wheel cap and wheel disc, notes ensureing machining allowance 4-6mm;
As shown in Figure 3, the forging of semi finishing wheel disc and wheel cap carries out roughing, semi finishing and fine finishing to half impeller channel respectively, and after completing this process step, impeller channel size meets drawing requirement substantially;
As shown in Figure 4, enclosing cover for impeller and hub disk docking, weld above-mentioned impeller two-part as requested;
As shown in Figure 5, after enclosing cover for impeller and hub disk have welded, eliminate welding stress, clamping is in the turning center of numerical control machine tool again, impeller outer profile is carried out finish turning and reaches drawing requirement, finally carries out manual grinding to smooth to intermediate weld.
Adopt large discharge super-large diameter half of the present invention milling half weldering enclosed 3 d impeller, example impeller external diameter at 1150mm, impeller exhaust outlet width 100 mm, material adopts high strength alloy steel; Secondly, for double shrouded wheel, wheel cap stress level is lower, and by overspeed test and carrying out flaw detection, impeller amount of deformation and intensity meet technological requirement completely; Because impeller adopts half milling partly to weld processing, flow channel shape and drawing molded line almost completely the same, impeller isentropic efficiency 1-3 percentage point can be improved.
Claims (4)
1. a large discharge super-large diameter half milling half weldering enclosed 3 d impeller, it mainly comprises wheel cap, wheel disc and blade, it is characterized in that described blade is divided into two halves, wherein integrally milling is shaping for a half vane and wheel cap, integrally milling is shaping for second half blade and wheel disc, and two half vanes are by forming integral blade in joint welding.
2. large discharge super-large diameter half according to claim 1 milling half weldering enclosed 3 d impeller, is characterized in that the joint of described two half vanes offers groove, and by being formed with a weld seam after welding in the middle of whole blade.
3. a manufacture method for large discharge super-large diameter enclosed 3 d impeller as claimed in claim 1 or 2, is characterized in that this manufacture method comprises the following steps:
A) forging of hub disk and wheel cap is arranged on the turning center of numerical control machine tool respectively, semi finishing is carried out to it;
B) hub disk and wheel cap are arranged on respectively on Five-axis numerical control milling machine, are divided equally by the blade of three-dimensional flow, a half vane overall milling on the forging of wheel disc is shaping, and a half vane overall milling on the forging of wheel cap is shaping;
C) the joint groove opening of two-part blade described in step b), by wheel disc after completing, wheel cap key is located, and has corrected rear mould and has compressed, and welded all blades;
D) eliminate stress, by shaping for the external frame finish turning of impeller after welding;
E) manual grinding is carried out to smooth to the weld of blade.
4. the manufacture method of large discharge super-large diameter enclosed 3 d impeller according to claim 3, is characterized in that:
In described step a), semi finishing turning is carried out to hub disk and wheel cap forging, and the machining allowance of 4-6mm will be ensured at wheel disc and wheel cap side;
In described step b), the blade of described three-dimensional flow is divided into two-part, and a semi-monolithic milling is on wheel disc, and a semi-monolithic milling covers at wheel;
In described step c), at the joint groove opening of two half vanes, and after fixing by frock, whole blade is welded, in the middle of whole blade, form a weld seam;
Described step d), e) in, after the wheel cap of impeller and wheel disc have welded, eliminated stress, again after clamping in the turning center of numerical control machine tool, finish turning is carried out to the external frame of impeller; Finally that blade weld manual grinding is extremely smooth.
Priority Applications (1)
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| CN201410473730.3A CN104279186A (en) | 2014-09-17 | 2014-09-17 | High-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and manufacturing method |
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| CN201410473730.3A CN104279186A (en) | 2014-09-17 | 2014-09-17 | High-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and manufacturing method |
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| CN104279186A true CN104279186A (en) | 2015-01-14 |
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| CN201410473730.3A Pending CN104279186A (en) | 2014-09-17 | 2014-09-17 | High-flow-rate ultra-large-diameter semi-milling and semi-welding closed ternary impeller and manufacturing method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105269278A (en) * | 2015-11-19 | 2016-01-27 | 湖北双剑鼓风机股份有限公司 | Machining method for three-dimensional flow impeller |
| CN106216967A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | A kind of processing method of three-dimensional flow impeller wheel cap |
| CN106216968A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | Dual-gripper air vane enclosing cover and the processing method of wheel disc |
| CN108581365A (en) * | 2018-06-26 | 2018-09-28 | 沈阳透平机械股份有限公司 | A kind of processing method of enclosed ternary slot welding impeller |
| CN109158671A (en) * | 2018-09-20 | 2019-01-08 | 重庆通用工业(集团)有限责任公司 | A kind of three-dimensional flow blade casted die mould machining bearing calibration |
| CN109642583A (en) * | 2016-08-10 | 2019-04-16 | 西门子股份公司 | Layer system, impeller and production method |
| CN110605542A (en) * | 2019-10-17 | 2019-12-24 | 中船重工龙江广瀚燃气轮机有限公司 | Titanium alloy wheel disc for gas turbine and drum destressing process method |
| CN110653579A (en) * | 2019-10-28 | 2020-01-07 | 襄阳五二五泵业有限公司 | Method for manufacturing closed impeller with narrow flow passage |
| CN111188790A (en) * | 2018-11-15 | 2020-05-22 | 苏州磁锋能源科技有限公司 | Novel three-dimensional flow closed impeller structure and machining method |
| CN112571076A (en) * | 2020-12-14 | 2021-03-30 | 重庆通用工业(集团)有限责任公司 | Three-dimensional flow impeller metal substrate additive manufacturing device |
| CN114131430A (en) * | 2021-11-10 | 2022-03-04 | 沈阳工程学院 | Ternary impeller grinding tool and technological method |
| CN114658686A (en) * | 2022-05-05 | 2022-06-24 | 山东省章丘鼓风机股份有限公司 | Impeller shaft disc of small-sized ventilator and machining method thereof |
| WO2023060826A1 (en) * | 2021-10-12 | 2023-04-20 | 东方电气集团东方电机有限公司 | Method for machining high-head water pump turbine blade disc |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105269278B (en) * | 2015-11-19 | 2019-02-19 | 湖北双剑鼓风机股份有限公司 | A kind of processing method of three-dimensional flow impeller |
| CN105269278A (en) * | 2015-11-19 | 2016-01-27 | 湖北双剑鼓风机股份有限公司 | Machining method for three-dimensional flow impeller |
| CN109642583A (en) * | 2016-08-10 | 2019-04-16 | 西门子股份公司 | Layer system, impeller and production method |
| CN106216967A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | A kind of processing method of three-dimensional flow impeller wheel cap |
| CN106216968A (en) * | 2016-08-30 | 2016-12-14 | 湖北双剑鼓风机股份有限公司 | Dual-gripper air vane enclosing cover and the processing method of wheel disc |
| CN108581365A (en) * | 2018-06-26 | 2018-09-28 | 沈阳透平机械股份有限公司 | A kind of processing method of enclosed ternary slot welding impeller |
| CN109158671B (en) * | 2018-09-20 | 2020-01-14 | 重庆通用工业(集团)有限责任公司 | Machining correction method for three-dimensional flow blade profiling die |
| CN109158671A (en) * | 2018-09-20 | 2019-01-08 | 重庆通用工业(集团)有限责任公司 | A kind of three-dimensional flow blade casted die mould machining bearing calibration |
| CN111188790A (en) * | 2018-11-15 | 2020-05-22 | 苏州磁锋能源科技有限公司 | Novel three-dimensional flow closed impeller structure and machining method |
| CN110605542B (en) * | 2019-10-17 | 2021-10-08 | 中船重工龙江广瀚燃气轮机有限公司 | Titanium alloy wheel disc for gas turbine and drum destressing process method |
| CN110605542A (en) * | 2019-10-17 | 2019-12-24 | 中船重工龙江广瀚燃气轮机有限公司 | Titanium alloy wheel disc for gas turbine and drum destressing process method |
| CN110653579A (en) * | 2019-10-28 | 2020-01-07 | 襄阳五二五泵业有限公司 | Method for manufacturing closed impeller with narrow flow passage |
| CN112571076A (en) * | 2020-12-14 | 2021-03-30 | 重庆通用工业(集团)有限责任公司 | Three-dimensional flow impeller metal substrate additive manufacturing device |
| CN112571076B (en) * | 2020-12-14 | 2024-06-07 | 重庆通用工业(集团)有限责任公司 | Ternary flow impeller metal substrate additive manufacturing device |
| WO2023060826A1 (en) * | 2021-10-12 | 2023-04-20 | 东方电气集团东方电机有限公司 | Method for machining high-head water pump turbine blade disc |
| CN114131430A (en) * | 2021-11-10 | 2022-03-04 | 沈阳工程学院 | Ternary impeller grinding tool and technological method |
| CN114658686A (en) * | 2022-05-05 | 2022-06-24 | 山东省章丘鼓风机股份有限公司 | Impeller shaft disc of small-sized ventilator and machining method thereof |
| CN114658686B (en) * | 2022-05-05 | 2024-02-20 | 山东省章丘鼓风机股份有限公司 | Impeller shaft disc of small ventilator and processing method thereof |
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Application publication date: 20150114 |
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