CN101947723B - Steam turbine blade fitting measuring tool and processing technology thereof - Google Patents
Steam turbine blade fitting measuring tool and processing technology thereof Download PDFInfo
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- CN101947723B CN101947723B CN2010102424147A CN201010242414A CN101947723B CN 101947723 B CN101947723 B CN 101947723B CN 2010102424147 A CN2010102424147 A CN 2010102424147A CN 201010242414 A CN201010242414 A CN 201010242414A CN 101947723 B CN101947723 B CN 101947723B
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Abstract
The invention discloses a steam turbine blade fitting measuring tool and a processing technology thereof. The fitting measuring tool is a fake impeller simulating an arc of steam turbine rotor impeller, the fake impeller is provided with a plurality of blade assembling slots distributed in a radial manner, the contour line, the radial radius and the circumferential graduation of the assembling slot are all consistent with those of the assembling slot of real impeller, and the bottom of the slot is provided with a blade locking screw hole and screws. The fitting measuring tool is used for the pre-assembly of blades, in order to inspect the quality indexes of assembly in advance, avoid the quality-related problem of blades in batch, reduce maintenance rate, enable blades to meet the assembly requirement in production workshop, enhance working efficiency, shorten assembly period of unit, and lower economic losses.
Description
Technical field:
The present invention relates to turbine blade, be specifically related to the brush measurer and the processing technology thereof of this blade.
Background technology:
Turbine blade is the vital part of steam turbine, and it is complex-shaped, is typical shaped piece; Difficulty of processing is very big, needs special purpose machine tool processing, and it is also big in batches; Steam turbine manufacturing firm generally all sets up special blade manufacturing sector, carries out specialized production, transports rotor assembling department in batch to; It is installed on the impeller of rotor by the goalkeeper of rotor department of assembly, that is to say, blade manufacturing and rotor are assembled into two departments that independently carry out mutually.
Because some quality index of blade are assembling indexs, for example blade root fit-up gap, integral shroud fit-up gap, blade root height, steam passage height etc. need after blade is packed rotor groove into, could check; Do not meet matching requirements if blade is packed into behind the impeller, then must blade be unloaded, return blade processing unit and reprocess processing; Time and effort consuming like this, inefficiency affects the unit manufacturing cycle easily adversely; In case find defective in qualityly, then all there is this problem with batch all blades are inevitable, the reclamation work amount is very big; Economic loss is great, also can upset the work plan of blade production division.
Summary of the invention:
The object of the invention is to manufacture and design a kind of turbine blade brush measurer, and blade is carried out pre-assembled; Carry out the assembly quality index test in advance, make blade in workshop, just meet matching requirements, to improve work efficiency; Shorten unit assembly period, reduce economic loss.
The objective of the invention is to realize like this:
A kind of turbine blade brush measurer; It is the phyllodium wheel of a segmental arc of simulation turbine rotor impeller; On this phyllodium wheel a plurality of blade fitting recess that distribute are radially arranged; The profile molded lines of fitting recess, radially radius and circular dividing are all consistent with the fitting recess of true impeller, and bottom land has blade to lock screw and screw.
Said phyllodium wheel has an exterior arc surface, a pair of axial end that is parallel to each other, and a pair of peripheral side that is parallel to each other, a baseplane, this baseplane is vertical with the central radiation of phyllodium wheel; Said blade fitting recess is three, is distributed on the exterior arc surface, and wherein, the radiation of the blade fitting recess in the middle of being positioned at overlaps with the central radiation of phyllodium wheel; The blade locking screw of each blade fitting recess bottom land all connects the baseplane.
The center line of said blade locking screw is on the radiation of place fitting recess.
The peripheral side of said phyllodium wheel is provided with handle.
The processing technology of above-mentioned turbine blade brush measurer comprises step:
1.. make a mold, the anchor clamps that use when being used as processing phyllodium wheel, this mold is a triangle gradient piece, has a baseplane, a tapered plane, a upright plane, a pair of vertical transverse plane; Be useful on screw hole and dowel hole that turbine blade brush measurer is installed on the tapered plane of mold, the bottom surface of mold is useful on this mold is fixed on the screw hole on the platen; The inclination angle of said tapered plane is identical with the inclination angle of blade fitting recess, and after the phyllodium wheel was loaded onto mold, the blade fitting recess of desire processing was vertical; Said screw hole, dowel hole have many groups, and its group number is identical with the quantity of blade fitting recess, each group screw hole, the corresponding blade fitting recess of dowel hole; Screw hole, dowel hole be at the circular dividing of the corresponding blade fitting recess of distributing position on the phyllodium wheel of tapered plane, makes the blade fitting recess that each group screw hole, dowel hole all can be corresponding with it be positioned at the position that lathe requires.
2.. six surfaces of processing phyllodium wheel, wherein, exterior arc surface is processed with fast silk cutting machine tool, and remaining surface is processed with machine tool, makes the phyllodium wheel blank;
3.. on the phyllodium wheel blank, process the dowel hole and the screw hole that cooperate, be connected with mold;
4.. mold is fixed on the workbench of wire cutting machine tool, is installed in the phyllodium wheel blank on the mold again, insert alignment pin, tight, open lathe, cut out the blade fitting recess that just in time is in the machine tooling position with screw;
5.. unload the phyllodium wheel blank; Reinstall, make another group screw hole, dowel hole on the corresponding mold of screw hole, dowel hole on the phyllodium wheel blank, cut out this group screw hole, the pairing blade fitting recess of dowel hole; So repeatedly, until cutting out all blade fitting recess.
4. step further comprises substep, earlier with fast silk cutting machine tool roughing blade fitting recess, uses slow silk cutting machine tool fine finishining blade fitting recess again.
2. step also has additional step afterwards, on two peripheral side of phyllodium wheel, processes handle respectively and connects screw, and process the handle adaptive with this screw, is installed on the phyllodium wheel.
Technique effect of the present invention:
Through using blade brush measurer, blade is carried out pre-assembled, carry out the assembly quality index test in advance, when processing print; Can test, avoid occurring blade quality of lot problem effectively, reduce repair rate significantly; And making blade in workshop, just meet matching requirements, when guaranteeing that blade formally assembles, every blade all is qualified; Increase substantially assembly efficiency, shortened the unit manufacturing cycle, obvious economic.
Description of drawings
Fig. 1 is the structural representation of this brush measurer
Fig. 2-the 1st, the longitudinal section of Fig. 1
Fig. 2-the 2nd, Fig. 1 vertical view
Fig. 3 is that the phyllodium wheel is gone up fitting recess normal direction molded lines drawing of tolerance range
Fig. 4 is the location drawing of two dowel holes and two screw holes on the brush measurer.
Fig. 5 is the three-view diagram of mold, wherein: Fig. 5-the 1st, the front view of mold; Fig. 5-the 2nd, the vertical view of mold; Fig. 5-the 3rd, the left side view of mold; Fig. 5-the 4th, the K of Fig. 5-1 is to view.
Fig. 6 is the structural representation of mold
Fig. 7 is that the phyllodium wheel is placed on the axial view on the mold
Fig. 8 is that the phyllodium wheel is placed on the vertical view on the mold
Fig. 9 is the sketch map of the fitting recess on the fast silk processing of the numerical control phyllodium wheel
Figure 10 is the sketch map of the fitting recess on the slow silk processing of the numerical control phyllodium wheel
The specific embodiment
During design brush measurer; It is a segmental arc of simulated impeller; Be referred to as the phyllodium wheel; General consider three blades are installed, three blade fitting recess are promptly arranged on the brush measurer, the profile molded lines of fitting recess, radially radius and circular dividing press the profile molded lines of impeller of rotor blade fitting recess respectively, radially radius and circular dividing design.
Consider processing with easy to use, the profile of phyllodium wheel not necessarily is designed to the fan-shaped of strictness, and intrados makes horizontal plane into, and two peripheral side neither the inclined-plane, makes risers into.In addition, move during for ease of use, on the phyllodium wheel, designed a pair of handle, be arranged on two peripheral side.
Concrete structure is following:
Referring to Fig. 1, Fig. 2, Fig. 3: the brush measurer is to be made up of phyllodium wheel I and handle II; α is the angle between the fitting recess in the section in the middle of the B, and R is a radially radius of fitting recess, and β is the angle (note: have only in the middle of the B on the section each fitting recess center line just to meet at any and this point also is the center of circle of R) on fitting recess central plane and thickness two sides; Fitting recess molded lines tolerance range is: be respectively 0mm three working face place tolerances; 0.013mm, 0.013mm, all the other local tolerances are 0.1mm.Wherein the gauge B of angle, radius, fitting recess tolerance range and phyllodium wheel all comes to turbine rotor impeller figure.
Referring to Fig. 4:, therefore, also need processing attachment screw hole and dowel hole on phyllodium wheel I because phyllodium wheel I will be installed on the mold III hereinafter described.2-Φ 12H6 pin-and-hole and 2-Φ 11/ Φ 17 screw hole locations are to confirm like this on the phyllodium wheel I: use the CAD mapping software; Make phyllodium wheel I profile earlier; Remake out the most left and the rightest molded lines on the phyllodium wheel I thickness two sides; This molded lines of 2-Φ 12H6 centre distance 15～20mm, pin-and-hole and screw hole relative position are that level and vertical direction distance are 15mm, and two screw holes are about 15mm to the distance of phyllodium wheel I bottom surface.
Because the fitting recess precision of brush measurer is high, if with common milling mode, one need moulding slightly, the finish-milling cutter; Two need huge anchor clamps, mill a groove, rotate an angle; Mill next groove again, rotate an angle again, suitable height of cost and precision also are difficult for guaranteeing like this.A numerical control cutting off machine (hereinafter to be referred as the slow silk) cutting accuracy of being careful is high, can satisfy the molded lines required precision.Because the copper wire of slow silk is the vertical state, and the blade fitting recess tilts, and adds man-hour; Need brush measurer pad one angle owing between the fitting recess circular dividing requirement arranged, process a groove after; The brush measurer also need change an angle, can't realize above-mentioned requirements with universal fixturing.This just needs a kind of special fixture to satisfy above-mentioned requirements, i.e. mold.
Referring to Fig. 5 (being Fig. 5-1, Fig. 5-2, Fig. 5-3, Fig. 5-4), Fig. 6: be a gradient piece on the mold III profile, the oblique angle is 90 °-β, and β is the inclination angle of blade fitting recess.Double dot dash line is a phyllodium wheel I among Fig. 5-1; Past left end d5 plane is the central plane of fitting recess in the middle of the phyllodium opinion I from mold III right side; D2 takes turns the distance of two alignment pins of I and mold III for connecting phyllodium; K is to the pin-and-hole that is location phyllodium wheel I for 1,2, No. 3, and 6-M10-6H is dark, and 20 hole depths 25 are fixed on the screwed hole of using on the mold III for phyllodium is taken turns I, the screw hole of 2-Φ 9/ Φ 16 for the mold III being fixed on soon, using on the workbench slowly; A * b * c groove is a undercut, and purpose is to hurt the mold III when preventing to cut molded lines.
Mold is design like this:
1.. design a gradient piece, make brush measurer thickness simultaneously be placed on its inclined-plane after, the middle fitting recess of brush measurer is the vertical state;
2.. two dowel holes of design on the brush measurer, under the situation of interference fit groove not, two dowel hole pitch-rows are as far as possible little, can reduce the length of mold like this, fitting recess in the middle of two dowel hole symmetries;
3.. go out two dowel holes on the gradient piece according to two dowel hole Position Design on the brush measurer;
4.. in the inclined-plane of gradient piece; According to brush measurer fitting recess radially radius and circular dividing; Design when two fitting recess go to the residing position of previous middle fitting recess respectively about the brush measurer and two the corresponding pin-and-hole of pin-and-hole positions on the brush measurer; Be to have 6 pin-and-holes on the inclined-plane of gradient piece, the hole wall of noting edge hole to the distance of gradient piece profile about 5mm;
5.. the brush measurer need be fixed on the gradient piece, so two screw holes are designed in the appropriate location on the brush measurer earlier, corresponding Position Design has 6 screwed holes on the gradient piece again;
6.. hurt the gradient piece when preventing to cut molded lines, open a undercut in the back of gradient piece, with about fitting recess single face 5 gap 1mm;
7.. the gradient piece need be fixed on the slow silk workbench; So, be designed with on the gradient piece 3 with slow silk workbench on the corresponding screw hole of screw, because of slow copper wire is 15mm to its workbench minimum distance at the back; Workbench is 40mm to the distance of its screw at the back; Being copper wire is 55mm to the screw center of workbench nearest, for the fitting recess that guarantees the brush measurer cuts out fully, the screw hole on the gradient piece apart from its undercut bottom surface more than or equal to 55mm;
8.. treat 4., 7. step intact after, the length of gradient piece and width have also just been confirmed, the foundation of the height of design gradient piece: the one, when the brush measurer goes to nadir, can not bump workbench, the 2nd, the pin-and-hole on the assurance inclined-plane and the screwed hole degree of depth are greater than 20mm.
Phyllodium wheel process is following:
Process six surfaces of phyllodium wheel earlier, wherein, exterior arc surface is processed with fast silk cutting machine tool, and remaining surface is processed with machine tool, makes the phyllodium wheel blank.On the phyllodium wheel blank, process the dowel hole and the screw hole that cooperate, be connected with the mold III, and the processing handle is installed screw and handle, thick then, fine finishining blade fitting recess.
Referring to Fig. 5, Fig. 7, Fig. 8, Fig. 9: the method for roughing phyllodium wheel fitting recess is: earlier the mold III is contained on the fast silk cutting machine tool workbench; Centering M, N face are screwed in 0.03mm, again phyllodium are taken turns I and are placed on the mold III inclined-plane; Two dowel holes (2-Φ 12H7) align with pin-and-hole on the mold III on the phyllodium wheel I; Insert 2 Φ, 12 special-purpose pins location, tight with the screw handle of 2 M10 * 40, can cut fitting recess.When the phyllodium wheel is installed,, then be process and assemble groove 1 if its two dowel hole (2-Φ 8H7) aligns with " 1 " and " 1 " pin-and-hole on the mold III; After the process finishing, unload the phyllodium wheel and reinstall, make phyllodium take turns " 2 " and " 2 " pin-and-hole on the dowel hole alignment mold III of I; Then be process and assemble groove 2, and the like, alignment " 3 " and " 3 " pin-and-hole; Process and assemble groove 3 can process all fitting recess in proper order.
Referring to Fig. 5, Fig. 7, Fig. 8, Figure 10: the method for fine finishining phyllodium wheel I fitting recess, identical with the roughing step, difference is to process with slow silk cutting machine tool.
The method for using of this brush measurer:
During with brush measurer check blade; Its bottom surface is put on the flat board; The blade root of three blades is inserted respectively in three fitting recess of brush measurer; Hold out against blade with three screws through brush measurer bottom locking screw, the blade root working face is all fitted tightly with brush measurer relevant work face, can measure blade root, integral shroud fit-up gap, blade root height and steam passage height.
Claims (7)
1. turbine blade brush measurer; It is the phyllodium wheel of a segmental arc of simulation turbine rotor impeller; On this phyllodium wheel a plurality of blade fitting recess that distribute are radially arranged; The profile molded lines of fitting recess, radially radius and circular dividing are all consistent with the fitting recess of true impeller, and bottom land has blade to lock screw and screw.
2. turbine blade brush measurer as claimed in claim 1; It is characterized in that: said phyllodium wheel has an exterior arc surface, a pair of axial end that is parallel to each other, a pair of peripheral side that is parallel to each other; A baseplane, this baseplane is vertical with the central radiation of phyllodium wheel; Said blade fitting recess is three, is distributed on the exterior arc surface, and wherein, the radiation of the blade fitting recess in the middle of being positioned at overlaps with the central radiation of phyllodium wheel; The blade locking screw of each blade fitting recess bottom land all connects the baseplane.
3. turbine blade brush measurer as claimed in claim 2 is characterized in that: the center line of said blade locking screw is on the radiation of place fitting recess.
4. turbine blade brush measurer as claimed in claim 2 is characterized in that: the peripheral side of said phyllodium wheel is provided with handle.
5. the processing technology of the said turbine blade brush of claim 2 measurer comprises step:
1.. make a mold, the anchor clamps that use when being used as processing phyllodium wheel, this mold is a triangle gradient piece, has a baseplane, a tapered plane, a upright plane, a pair of vertical transverse plane; Be useful on screw hole and dowel hole that turbine blade brush measurer is installed on the tapered plane of mold, the bottom surface of mold is useful on this mold is fixed on the screw hole on the platen; The inclination angle of said tapered plane is identical with the inclination angle of blade fitting recess, and after the phyllodium wheel was loaded onto mold, the blade fitting recess of desire processing was vertical; Said screw hole, the dowel hole that is used to install turbine blade brush measurer has many groups, and its group number is identical with the quantity of blade fitting recess, and each group is used to install corresponding blade fitting recess of screw hole, dowel hole of turbine blade brush measurer; Be used to install the screw hole, dowel hole of turbine blade brush measurer the circular dividing of the corresponding blade fitting recess of distributing position on the phyllodium wheel, make each group be used to install the blade fitting recess that the screw hole of turbine blade brush measurer, dowel hole all can be corresponding with it and be positioned at the position that lathe requires at tapered plane;
2.. six surfaces of processing phyllodium wheel, wherein, exterior arc surface is processed with fast silk cutting machine tool, and remaining surface is processed with machine tool, makes the phyllodium wheel blank;
3.. on the phyllodium wheel blank, process the dowel hole and the screw hole that cooperate, be connected with mold;
4.. mold is fixed on the workbench of wire cutting machine tool, is installed in the phyllodium wheel blank on the mold again, insert alignment pin, tight, open lathe, cut out the blade fitting recess that just in time is in the machine tooling position with screw;
5.. unload the phyllodium wheel blank; Reinstall, make another group screw hole, dowel hole on the corresponding mold of screw hole, dowel hole on the phyllodium wheel blank, cut out this group screw hole, the pairing blade fitting recess of dowel hole; So repeatedly, until cutting out all blade fitting recess.
6. turbine blade brush measurer processing technology as claimed in claim 5, it is characterized in that: 4. step further comprises substep, earlier with fast silk cutting machine tool roughing blade fitting recess, uses slow silk cutting machine tool fine finishining blade fitting recess again.
7. turbine blade brush measurer processing technology as claimed in claim 5; It is characterized in that: 2. step also has additional step afterwards; On two peripheral side of phyllodium wheel, process handle respectively and connect screw, and process the handle adaptive, be installed on the phyllodium wheel with this screw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102424147A CN101947723B (en) | 2010-07-30 | 2010-07-30 | Steam turbine blade fitting measuring tool and processing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102424147A CN101947723B (en) | 2010-07-30 | 2010-07-30 | Steam turbine blade fitting measuring tool and processing technology thereof |
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| CN101947723A CN101947723A (en) | 2011-01-19 |
| CN101947723B true CN101947723B (en) | 2012-05-09 |
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| CN113118924B (en) * | 2021-06-17 | 2021-09-03 | 中国航发上海商用航空发动机制造有限责任公司 | Rotor blade changing method |
| CN113478181B (en) * | 2021-07-15 | 2022-09-02 | 南通中能机械制造有限公司 | Machining process for large moving blade with pagoda-shaped tooth-shaped blade root, bent air passage and molded surface |
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