CN102689022A - Tooth-shaped blade root slot machining method of low-pressure rotor final-stage impeller of turbine - Google Patents
Tooth-shaped blade root slot machining method of low-pressure rotor final-stage impeller of turbine Download PDFInfo
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- CN102689022A CN102689022A CN2012101924703A CN201210192470A CN102689022A CN 102689022 A CN102689022 A CN 102689022A CN 2012101924703 A CN2012101924703 A CN 2012101924703A CN 201210192470 A CN201210192470 A CN 201210192470A CN 102689022 A CN102689022 A CN 102689022A
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Abstract
The invention relates to a tooth-shaped root slot machining method of a low-pressure rotor final-stage impeller of a turbine, relating to a tooth-shaped blade root slot machining method, and solving the problems that machining precision is low, and the accuracy and the symmetry of tooth shape can not be ensured in a conventional tooth-shaped blade root slot machining method. The tooth-shaped root slot machining method comprises the following steps of: synchronously roughly turning a plurality of tooth-shaped outlines of a tooth-shaped blade root slot by utilizing a group of thick and straight cutting tools; synchronously exactly turning the base diameters of a plurality of tooth shapes of the tooth-shaped cutting tool by utilizing a group of wide-head cutting tools; synchronously finish turning bottoms of the plurality of tooth-shaped slots by utilizing a group of sharp-head cutting tools; synchronously finish turning tooth shapes of the upper part and the lower part of the interior of the tooth-shaped blade root slot by utilizing a group of tooth-shaped cutting tools; and firstly machining one of two side inclined surfaces of the tooth-shaped blade root slot, machining the tooth shape of the one side inclined surface by taking a flat surface as a reference, measuring the tooth shape of the one side inclined surface by taking a flat surface as a location surface by utilizing a half-type line template, and machining the other side inclined surface by taking the tooth shape of the one side inclined surface as the reference. The tooth-shaped root slot machining method disclosed by the invention is applied to machining tooth-shaped blade root slots.
Description
Technical field
The present invention relates to a kind of processing method of turbine rotor impeller flute profile blade root slot.
Background technology
The blade root molded lines of steam turbine low-pressure rotor impeller is called steam turbine low-pressure rotor impeller flute profile blade root slot.The groove tooth of steam turbine low-pressure rotor impeller flute profile blade root slot is fine and closely woven; And flute profile blade root slot both sides are the inclined-plane of 10 degree; The flute profile working face becomes an angle of 90 degrees with the serrate slot end face, the degree of accuracy and symmetry that existing flute profile blade root slot processing method machining accuracy is low, can't guarantee profile of tooth.
Summary of the invention
The present invention is in order to solve the degree of accuracy and the symmetric problem that existing flute profile blade root slot processing method machining accuracy is low, can't guarantee profile of tooth, and then proposes a kind of flute profile blade root slot processing method of steam turbine low-pressure rotor impeller.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: the flute profile blade root slot processing method of steam turbine low-pressure rotor impeller of the present invention realizes according to following steps:
Step 1, adopt one group of a plurality of flute profile profile of the synchronous rough turn flute profile blade root slot of thick straight knife tool, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 3.7mm;
Step 2, the footpath, the end of adopting one group of a plurality of flute profile of the accurate flute profile blade root slot of the synchronous car of duch nose tool tool, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 3.7mm;
Step 3, adopt the one group of a plurality of flute profile groove of the synchronous finish turning flute profile of pointed tool blade root slot bottom land, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 5.2mm;
Step 4, adopt top and the bottom flute profile in one group of flute profile cutter finish turning flute profile blade root slot, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 5.2mm;
Step 5, processing inclined-plane, flute profile blade root slot both sides:
Process the skew back face in the inclined-plane, flute profile blade root slot both sides earlier; To face directly is that benchmark is processed the flute profile on the above-mentioned skew back face; Adopt the half mould line tempte to measure the flute profile on the above-mentioned skew back face to face directly as locating surface; Be benchmark with the flute profile on the above-mentioned skew back face then, the opposite side inclined-plane in the processing inclined-plane, both sides.
The invention has the beneficial effects as follows:
The processing method of flute profile blade root slot of the present invention adopts four groups of cutters progressively to make up processing, the flute profile blade root slot of processing vapor turbine low pressure rotor impeller accurately, the degree of accuracy and symmetry that machining accuracy is high, can guarantee profile of tooth; Improved simultaneously working (machining) efficiency greatly.
Description of drawings
Fig. 1 is a flute profile blade root slot molded lines front view of the present invention; Fig. 2 is the cutter for same front view of step 1 in the specific embodiment one; Fig. 3 is the cutter for same front view of step 2 in the specific embodiment one; Fig. 4 is the cutter for same front view of step 3 in the specific embodiment one, and Fig. 5 is the cutter for same front view of step 4 in the specific embodiment one.
The specific embodiment
The specific embodiment one: shown in Fig. 1～5, the flute profile blade root slot processing method of the described steam turbine low-pressure rotor of this embodiment impeller realizes according to following steps:
Step 1, adopt one group of a plurality of flute profile profile of the synchronous rough turn flute profile blade root slot of thick straight knife tool, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 3.7mm;
Step 2, the footpath, the end of adopting one group of a plurality of flute profile of the accurate flute profile blade root slot of the synchronous car of duch nose tool tool, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 3.7mm;
Step 3, adopt the one group of a plurality of flute profile groove of the synchronous finish turning flute profile of pointed tool blade root slot bottom land, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 5.2mm;
Step 4, adopt top and the bottom flute profile in one group of flute profile cutter finish turning flute profile blade root slot, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 5.2mm;
Step 5, processing inclined-plane, flute profile blade root slot both sides:
Process the skew back face in the inclined-plane, flute profile blade root slot both sides earlier; To face directly is that benchmark is processed the flute profile on the above-mentioned skew back face; Adopt the half mould line tempte to measure the flute profile on the above-mentioned skew back face to face directly as locating surface; Be benchmark with the flute profile on the above-mentioned skew back face then, the opposite side inclined-plane in the processing inclined-plane, both sides.
Said one group of thick straight knife tool is the integral type cutter, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot.The notch position that utilizes cutter is as axial tool setting benchmark, and the cutter-aligndimension of cutter is 3.7mm in step 1 and the step 2, and the cutter-aligndimension of cutter is 5.2mm in step 3 and the step 4; Plug flute profile blade root slot notch and the size of cutter shaft between benchmark are cutter-aligndimension, and cutter-aligndimension deducts 0.5mm and is depth of cut, and flute profile blade root slot both sides are 10 ° of inclined-planes; The flute profile working face becomes an angle of 90 degrees with flute profile groove end face, processes 10 ° of inclined-planes of a side earlier, and the opposite side inclined-plane wouldn't process; For facing directly; To face directly is benchmark processing inclined-plane one side flute profile, and when the half mould line was measured, the half mould line tempte was that locating surface is measured to face directly also; After one side flute profile machines, be benchmark with the flute profile that processes again, will face directly and be processed into the inclined-plane and then use holotype line tempte processing flute profile; Strict control flute profile blade root slot outsourcing boss cylindrical is to the tolerance of the first tooth working face size during final the measurement; Simultaneously; Pruned in the tip of half mould line tempte flute profile; Measure accurately under the situation measurement of problems affect molded lines because straight line and cambered surface the are in the way during wheel measuring of half mould line tempte go side when reducing workpiece as far as possible and being worked in the margin of tolerance not influencing flute profile.
Claims (2)
1. the flute profile blade root slot processing method of a steam turbine low-pressure rotor impeller, it is characterized in that: said flute profile blade root slot processing method realizes according to following steps:
Step 1, adopt one group of a plurality of flute profile profile of the synchronous rough turn flute profile blade root slot of thick straight knife tool, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 3.7mm;
Step 2, the footpath, the end of adopting one group of a plurality of flute profile of the accurate flute profile blade root slot of the synchronous car of duch nose tool tool, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 3.7mm;
Step 3, adopt the one group of a plurality of flute profile groove of the synchronous finish turning flute profile of pointed tool blade root slot bottom land, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 5.2mm;
Step 4, adopt top and the bottom flute profile in one group of flute profile cutter finish turning flute profile blade root slot, the consistent setting of quantity of the quantity of cutter and flute profile blade root slot, the cutter-aligndimension of cutter is 5.2mm;
Step 5, processing inclined-plane, flute profile blade root slot both sides:
Process the skew back face in the inclined-plane, flute profile blade root slot both sides earlier; To face directly is that benchmark is processed the flute profile on the above-mentioned skew back face; Adopt the half mould line tempte to measure the flute profile on the above-mentioned skew back face to face directly as locating surface; Be benchmark with the flute profile on the above-mentioned skew back face then, the opposite side inclined-plane in the processing inclined-plane, both sides.
2. the flute profile blade root slot processing method of steam turbine low-pressure rotor impeller according to claim 1 is characterized in that: in step 1～four, the notch position that utilizes every group of cutter is as axial tool setting benchmark.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101924703A CN102689022A (en) | 2012-06-12 | 2012-06-12 | Tooth-shaped blade root slot machining method of low-pressure rotor final-stage impeller of turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101924703A CN102689022A (en) | 2012-06-12 | 2012-06-12 | Tooth-shaped blade root slot machining method of low-pressure rotor final-stage impeller of turbine |
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| CN102689022A true CN102689022A (en) | 2012-09-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018888A (en) * | 2014-06-23 | 2014-09-03 | 中国船舶重工集团公司第七0四研究所 | Wrapping fir type blade root for circumferentially installing blades |
| CN104551560A (en) * | 2014-12-10 | 2015-04-29 | 哈尔滨汽轮机厂有限责任公司 | Machining and checking method of blade root measuring tool |
| CN109570907A (en) * | 2019-01-09 | 2019-04-05 | 中国航发南方工业有限公司 | Groove profile chamber and processing method |
| CN109719308A (en) * | 2018-12-11 | 2019-05-07 | 中国航发贵州黎阳航空动力有限公司 | A kind of annular tongue-and-groove processing presetting cutter method |
| CN111266603A (en) * | 2020-01-15 | 2020-06-12 | 哈尔滨汽轮机厂有限责任公司 | Tooth-shaped wheel groove machining method |
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| CN1057700A (en) * | 1990-06-26 | 1992-01-08 | 西屋电气公司 | Turbine rotor and impeller assembly |
| US5242270A (en) * | 1992-01-31 | 1993-09-07 | Westinghouse Electric Corp. | Platform motion restraints for freestanding turbine blades |
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| EP2112328A1 (en) * | 2008-04-21 | 2009-10-28 | Siemens Aktiengesellschaft | Rotor for a turbomachine |
| CN101780560A (en) * | 2010-04-12 | 2010-07-21 | 如皋透平叶片制造有限公司 | Blade double inverted T-shaped blade root slot milling cutter of steam turbine |
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2012
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| US5242270A (en) * | 1992-01-31 | 1993-09-07 | Westinghouse Electric Corp. | Platform motion restraints for freestanding turbine blades |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018888A (en) * | 2014-06-23 | 2014-09-03 | 中国船舶重工集团公司第七0四研究所 | Wrapping fir type blade root for circumferentially installing blades |
| CN104551560A (en) * | 2014-12-10 | 2015-04-29 | 哈尔滨汽轮机厂有限责任公司 | Machining and checking method of blade root measuring tool |
| CN104551560B (en) * | 2014-12-10 | 2017-01-18 | 哈尔滨汽轮机厂有限责任公司 | Machining and checking method of blade root measuring tool |
| CN109719308A (en) * | 2018-12-11 | 2019-05-07 | 中国航发贵州黎阳航空动力有限公司 | A kind of annular tongue-and-groove processing presetting cutter method |
| CN109570907A (en) * | 2019-01-09 | 2019-04-05 | 中国航发南方工业有限公司 | Groove profile chamber and processing method |
| CN109570907B (en) * | 2019-01-09 | 2020-02-07 | 中国航发南方工业有限公司 | Groove cavity and machining method |
| CN111266603A (en) * | 2020-01-15 | 2020-06-12 | 哈尔滨汽轮机厂有限责任公司 | Tooth-shaped wheel groove machining method |
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Application publication date: 20120926 |