CN102615272B - Crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting - Google Patents
Crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting Download PDFInfo
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- CN102615272B CN102615272B CN201110028331.2A CN201110028331A CN102615272B CN 102615272 B CN102615272 B CN 102615272B CN 201110028331 A CN201110028331 A CN 201110028331A CN 102615272 B CN102615272 B CN 102615272B
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Abstract
The invention aims to provide a crystallizer for MW (megawatt)-scale wind power torsion shaft electroslag casting, so as to provide a core device for casting production by an electroslag casting method. Wind power torsion shaft blanks generated by the crystallizer achieve excellent surface moulding quality and inner portion quality, and completely satisfy or exceed technical requirements. The crystallizer, which is convenient to prepare, has the advantages of being labor-saving and material-saving and being convenient in casting operation, accurate in assembling and positioning operation, having high cast metal utilization rate and the like. In addition, when the crystallizer is in use, a retreating apparatus, a temperature monitoring apparatus and a positioning apparatus are adopted, and the crystallizer stands the production test in terms of various indexes, without common crystallizer damages of slag leakage, water leakage, weld crack and deformation and the like.
Description
Technical field
The invention provides a kind of casting molds, particularly relate to mould---the MW level scale wind power torsion shaft electroslag casting crystallizer of the whole MW of manufacture of a kind of electroslag smelting casting level wind-powered electricity generation torsional axis blank.
Background technology
Electroslag smelting casting is as an advanced foundry engieering, liquid steel refining and casting two procedures are combined, and foundry goods crystalline structure even compact, the purity of producing are high, sulphur and phosphorus content is low, non-metallic inclusion is few, have good mechanical property and anti-fatigue performance.Can reach the quality standard of forging, can realize foundry goods near-net-shape again, the doulbe-sides' victory of performance period and cost, by modern foundry enterprise extensive use.Product relates to the modernization industry such as aviation, shipbuilding, electric power, chemical industry and heavy-duty machinery.
Wind-powered electricity generation is the green energy resource of very advocating at present, but wind-driven generator running environment severe (45 ℃ to+45 ℃), part quality requires very harsh (mechanical property is high, and fatigue resistance is good, and corrosion resistance is good).Along with the development & construction of MW class wind turbine (future market main product), wind-power electricity generation is to high efficiency, maximization future development, more and more high to the quality requirement of the important spare part of wind-power electricity generation.MW level wind-powered electricity generation torsional axis quality directly affects the quality of MW level wind-powered electricity generation unit.
Crystallizer is the vitals of electroslag furnace, belongs to oven body part, and when founding, it plays working chamber's effect of fusing, refining on the one hand; Play a part again on the other hand casting die and form foundry goods, fusing is all carried out with moulding in crystallizer, so crystallizer work under bad environment, all the more so for wind-powered electricity generation torsional axis crystallizer, mold structure is complicated, stressed complexity in founding, for this reason, crystallizer must have the features such as heat conduction is strong, resistance to deformation strong, easy manufacture.
As everyone knows, MW level wind-powered electricity generation torsional axis complex structure (see figure 1), each crank throw is along spatial distribution, complex-shaped.Therefore, MW level scale wind power torsion shaft electroslag casting is more complicated by the structure of crystallizer, according to conventional method, cannot make and use, and has restricted the development of China's such foundry goods of electroslag smelting casting since for a long time always.
Summary of the invention
The object of the present invention is to provide a kind of novel MW level scale wind power torsion shaft electroslag casting crystallizer, for electroslag smelting casting method, produce such foundry goods nucleus equipment is provided.Wind-powered electricity generation torsional axis blank surface forming quality and the internal soundness of utilizing this crystallizer to produce are all good, meet completely or surpass specification requirement, this crystallizer has easy to make, saving of labor, material-saving advantage, realized founding easy to operate simultaneously, assembling accurate positioning, founding using rate of metal advantages of higher.In addition, this crystallizer has in use adopted yielding device, device for detecting temperature, and positioner, practical rear indices all withstands produces test, does not occur leaking slag, leaking, and the common crystallizer such as weld cracking distortion damages.
1, design is formulated
Thinking: electroslag smelting casting integral one-step molding mode is manufactured MW level wind-powered electricity generation torsional axis is the trunnion vestibule founding that utilizes consutrode to connect along crystallizer.Design MW level wind-powered electricity generation torsional axis (heavy castings that crank arm is very thick) electroslag smelting casting crystallizer, must solve following thorny problem.
(1) conventional electroslag smelting casting crystallizer, foundry goods demoulding difficulty is very large.
(2) in the activity coefficient of conventional shaft position crystallizer maximum (0.55), at the activity coefficient minimum (0.12-0.18) of crank thickness crystallizer, if activity coefficient by 0.55 direct mutagenesis to 0.15, crank place cannot realize well fills type.
(3) solve conventional scheme and cannot realize crank position monitoring and the full type that fills of crank;
(4) for the very large foundry goods of this crank spacing (approximately 2.5 meters), when solidifying, crank is axially conventionally contracted in 10mm left and right, and huge stress is difficult to discharge, by set up yielding facility on crystallizer, to avoid casting crack and crystallizer to damage too early.
(5), for this axle very long (the nearly 4 meters) foundry goods that footstalk is very thick, avoid discharging the improper large deformation that produces because of axial stress.
(6), for the very long hollow mould of axle, during location, concentricity and die cavity gap are all wayward.
In order to overcome above difficulty, stressed when analyzing MW level scale wind power torsion shaft electroslag casting with mold structure and founding, finally determine following design:
(a) consider somatotype position (in Fig. 2 ~ 5,19 represent somatotype position), realize the foundry goods demoulding smoothly.
(b) the transition die cavity of increase and conventional axle crystallizer on crank crystallizer, well fills type to realize crank place.For electroslag smelting casting crystallizer, increase die cavity, be just equal to and increase blank weight.If it is excessive that transition die cavity increases, can cause wind-powered electricity generation torsional axis blank increment too much, reduce using rate of metal, processing capacity is increased; Otherwise it is too small that crystallizer transition die cavity increases, cannot meet normal founding needs and lose meaning.The relation of calculating electroslag smelting casting packing ratio and founding power by theory is added casting and is produced for many years practice summary, has finally determined a crystallizer transition die cavity recruitment for minimum relatively.The increment occurring on blank is made for composition and Performance Detection as test lug under can cutting by machining.
(c) crank position monitoring is closely bound up with the full type that fills of crank; Crank position detects accurately, and corresponding power controllability strengthens, and power tracking is timely, and to fill type good for foundry goods crank position; Only have crank position to detect accurately simultaneously, could control the receipts arc technique of crank back segment, guarantee that foundry goods is without defects such as shrinkage porosites.
(d) by setting up, make a concession the U-shaped groove of servicing unit, jack and L plate on crystallizer, according to two kinds of yielding modes, can realize and axially make a concession the function that distance is greater than 12mm, can effectively avoid casting crack and crystallizer to damage too early.
(e) by set up yielding auxiliary equipment on crystallizer, there is the axial function that distance is greater than 12mm of making a concession, stress is well discharged, and this just can be avoided foundry goods axially to solidify the improper generation large deformation of Stress Release completely or crystallizer produces large deformation, extends crystallizer service life.
(f) by set up alignment pin between lower flange on crystallizer, locate, can guarantee crystallizer good location, realize axial concentricity and be no more than 2mm, die cavity gap is no more than 4mm.
The present invention specifically provides MW level scale wind power torsion shaft electroslag casting crystallizer, it is characterized in that:
Described crystallizer is divided into crank crystallizer and conventional axle crystallizer two parts, and crank crystallizer part consists of joint I 21, joint II 22, joint III 23, joint IV 24, and conventional axle crystallizer is partly joint V 25;
Crystallizer is to consist of the inner chamber template 5 adapting with crank shape, water seam plate 11, water jacket plate 12 and the transition die cavity 15 set up in the thickest position of crank, water seam plate 11 is arranged on the outside of inner chamber template 5, the inner side of water jacket plate 12, between water seam plate 11 and water jacket plate 12, be water jacket 14, water jacket 14 bottoms are installed with a plurality of water inlet pipes 4, top is installed with a plurality of outlet pipes 3; Water inlet pipe and water outlet pipe respectively on pressing close to lower flange position and with 5 °-15 ° of flanged plate angulations; Inner chamber template 5, water seam plate 11, water jacket plate 12 and water jacket 14 are tightly connected by upper flange 1, lower flange 2 and legislation blue 13; On crank crystallizer, be increased in the transition die cavity 15 of the thickest position of crank and conventional shaft position, transition die cavity 15 is highly 150-300mm, adopts round-corner transition.
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, it is characterized in that: described crystallizer has yielding auxiliary equipment, be device for detecting temperature, described device for detecting temperature is comprised of the thermocouple 16 and the external connection data collector of thermocouple 16 that insert crystallizer internal cavity.The thermocouple groove of device for detecting temperature processes in advance on crystallizer, and thermocouple groove is squeezed into crystallizer copper depth of inner cavity 2-10mm, and thermocouple 16 can freely be torn group connection data collector open so that thermometric.In torsional axis fusion-casting process, adopt crystallizer water temperature control system, foundry goods different parts fusion-casting process is carried out to temperature control, adjusting process parameter, guarantees foundry goods inside and surface quality at any time.
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, it is characterized in that: between inner chamber template 5 and water seam plate 11, template reinforcement 10 is set, and be welded into a whole with inner chamber template 5 and water seam plate 11, inner chamber template 5 outsides are separated into four regions, each region forms independent water circulation, water seam width between inner chamber template 5 and water seam plate 11 is 15-45mm, even transition.
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, is characterized in that: on template reinforcement 10, process the groove 8 of long 20-100mm, wide 15-45mm, make two regional connectivities that face mutually in four regions in inner chamber template 5 outsides.
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, is characterized in that: water jacket 14 is installed in the water seam outer 50-100mm of plate 11 place.
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, is characterized in that, adopts locating device for positioning pin: 2 employing alignment pins of upper flange 1 and lower flange, 17 location (network for location as shown in figure 12).Alignment pin 17 can require to arrange between each layer of crystallizer according to available accuracy (conventionally diagonal positions 1 and 4 angles are respectively set all arrange), and between alignment pin 17 and pin control, gap can be according to required precision setting.By locating device for positioning pin, can realize after minute crystal crystallizer cooperation, die cavity gap is no more than 4mm, and axially concentricity is no more than 2mm.
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, it is characterized in that: described crank crystallizer is just like two kinds of yielding modes shown in Figure 14,15, yielding servicing unit is set on crystallizer, this device is comprised of U-shaped groove a 6, U-shaped groove b 7, jack 9 and L plate 18, by jack 9, affects L plate 18 to slide along U-shaped groove.Realize the nervous position 40 be no more than ± 6mm of stove deflection of surplus.Crystallizer is made a concession servicing unit except L plate 18, and remainder and crystallizer can freely be torn group open, are convenient to maintenance and use.
2. the formulation of crystallizer fabrication scheme
Instructions for use according to MW level scale wind power torsion shaft electroslag casting with crystallizer, carries out after Comprehensive Assessment crystallizer material, determines that crystallizer internal cavity template 5 adopts other position of copper coin to adopt copper-steel combination of steel plate to make.
The crystallizer internal cavity dimensional discrepancy of tradition model+manually beat method moulding is large, sometimes must additional structure welding fabrication, not only increased in size deviation but also increase the weld seam quantity in inner chamber profile, leaked, leaked slag risk while improving founding, and these are all using of crystallizer and maintenance brings difficulty.
For guaranteeing the making precision of this MW level wind-powered electricity generation torsional axis crystallizer, first by 3D solid technology, manufacture cranking model during fabrication, then adopt die forging method by forging forming crystallizer internal cavity template 5 of whole copper coin, the crystallizer dimensional accuracy of making is like this high, the product of shape and design is close, without simplifying molded line, and there is no weld seam on 5, inner chamber template, improved the service life of crystallizer.
For this kind wind-powered electricity generation torsional axis crystallizer, to consider during fabrication because crystallizer body is larger, during founding, power must be also larger, so adopt template reinforcement become with lacing wire square crossing and inner chamber template integrally welded, resistance of deformation and crystallizer cooling capacity when the water-cooled district of crystallizer is made to subregion water-cooled and strengthens founding.In addition, in crystallizer manufacture process, also to take into full account wind-powered electricity generation torsional axis and shrink the infringement to this wind-powered electricity generation torsional axis crystallizer, the friction self-locking angle that the manufacture angle of crank arm should be greater than this place while shrinking, and whole crystallizer must be made to the separate assembling crystallizer of more piece, like this to shrink infringement weaken and there is effect the aspect such as manufacture and anti-deformation, and be also conducive to the demoulding of wind-powered electricity generation torsional axis blank.
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, it is characterized in that: described torsional axis crystallizer is divided into the opposite opened Split assembled crystallizer of 10,5 joint by crank quantity, somatotype position 19 is divided into joint I 21, joint II 22, joint III 23, joint IV 24 and joint V 25 by this crystallizer.There are two kinds of somatotype schemes (seeing Fig. 2,3).
MW level scale wind power torsion shaft electroslag casting crystallizer provided by the invention, is characterized in that: inner chamber template 5 is to adopt 3D solid die-forging forming with whole copper coin, and other position all adopts steel plate.Described copper coin is copper plate, and thickness is 10-25mm, and water seam plate 11 and water jacket plate 12 are made by 10mm steel plate, and upper flange 1, lower flange 2 and legislation blue 13 are made by 15-25mm steel plate.Template reinforcement, lacing wire thickness are 15-25mm.
Crystallizer provided by the invention can be realized the foundry goods demoulding smoothly, has transition die cavity, and crank position can be monitored, and can realize axially and making a concession, and without large deformation, positioning precision is high.
Accompanying drawing explanation
Fig. 1 MW level wind-powered electricity generation torsional axis schematic diagram
Crystallizer somatotype scheme one schematic diagram for Fig. 2 MW level scale wind power torsion shaft electroslag casting;
Crystallizer somatotype scheme two schematic diagrames for Fig. 3 MW level scale wind power torsion shaft electroslag casting;
Fig. 4 MW level scale wind power torsion shaft electroslag casting crystallizer internal cavity side view;
Fig. 5 MW level scale wind power torsion shaft electroslag casting crystallizer internal cavity front view;
Fig. 6 MW level scale wind power torsion shaft electroslag casting mold structure schematic diagram;
Fig. 7 MW level scale wind power torsion shaft electroslag casting crystallizer sectional view;
Fig. 8 MW level scale wind power torsion shaft electroslag casting crystallizer sectional view;
Crystallizer overall structure schematic diagram for Fig. 9 MW level scale wind power torsion shaft electroslag casting;
Figure 10 crank and conventional axle transition die cavity schematic diagram;
Figure 11 device for detecting temperature---thermocouple 16 position views;
Figure 12 alignment pin 17 schematic diagrames;
Figure 13 alignment pin 17 positions arrange figure;
Figure 14 MW level scale wind power torsion shaft electroslag casting is made a concession servicing unit one schematic diagram with crystallizer;
Figure 15 MW level scale wind power torsion shaft electroslag casting is made a concession servicing unit two schematic diagrames with crystallizer.
The specific embodiment
Embodiment 1
1, determine crystallizer somatotype scheme, crank crystallizer and conventional axle crystallizer transition die cavity recruitment:
First according to Part Drawing Design, go out the somatotype scheme (see figure 2) of wind-powered electricity generation torsional axis crystallizer, somatotype scheme is determining the success or failure of crystallizer.Torsional axis crystallizer is divided into the opposite opened Split assembled crystallizer of 10,5 joint by crank quantity, somatotype position 19 is divided into joint I 21, joint II 22, joint III 23, joint IV 24 and joint V 25 by this crystallizer.Secondly in crank arm thickness, design increases transition die cavity, and transition die cavity size is by deciding the even seamless transit time of crank arm thickness power and conventional shaft power.Finally determining even seamless transit time with checking is as calculated probably 1 hour, and then definite transition die cavity height is 150mm-250mm, in the present embodiment, transition die cavity height is 200mm, and the transition die cavity increasing adopts circular transition to add on crank crystallizer.
2, the design of crystallizer and manufacture
MW level scale wind power torsion shaft electroslag casting, is tightly connected and is formed by upper flange 1, lower flange 2 and legislation blue 13 by inner chamber template 5, water seam plate 11 and water jacket plate 12 with mold structure as shown in Fig. 4 ~ 13.
Water seam plate 11, water jacket plate 12 and legislation blue 13 adopt common A3 steel plate materials to be integrally connected by structure welding mode.Inner chamber template 5 adopts the thick forging forming of copper plate of 15mm.Water seam plate 11 is arranged on the outside of inner chamber template 5, the inner side of water jacket plate 12, and template reinforcement 10 is integrally welded with inner chamber template 5 and water seam plate 11, so just inner chamber template outside is divided into independent water circulation region.In template reinforcement and lacing wire, add respectively section chief 25mm, wide 20mm sees through the thick groove 8 of steel plate, two regions of facing mutually is also all communicated with, to avoid causing this district's water-cooled variation or Non-water-cooled to cause the accident because certain subregion water circulation goes wrong again.
Upper flange 1, lower flange 2 and blue 13 steel plate thickness of making laws are 20mm; Template reinforcement 10, lacing wire thickness are 25mm; Water seam plate 11 is 10mm with water jacket plate 12 thickness.Water-cooled width between inner chamber template 5 and water seam plate 12 is 25mm.This structure of crystallizer makes crystallizer when water flowing is cooling, both can realize the independent water circulation in each district also can realize the associating water circulation of facing mutually region, has improved resistance of deformation and the water-cooled ability of crystallizer.
Water jacket 14 is sleeved on the water seam outer 60mm of plate 11 place, its upper/lower terminal respectively with upper flange 1 and lower flange 2 welded seals.In the bottom of water jacket 14, be installed with 4 (every layer) water inlet pipes 4, on the top of water jacket 14, be installed with 4 (every layer) outlet pipes 3.Water inlet pipe and water outlet pipe respectively on pressing close to lower flange position and with 15 ° of flanged plate angulations.In four regions of water jacket 14 and lacing wire junction, also place respectively two outlet pipes 3.Water inlet pipe 4 and outlet pipe 3, be common steel tube, and all adopt welding manner to be connected with water jacket 14.
Inner chamber template 5 adopts 3D solid die-forging forming to make, and model three-dimensional entity model, then by model conversation mfg. moulding die, finally utilizes mould by monoblock copper coin die-forging forming crystallizer internal cavity template 5.
On crystallizer, arrange and make a concession servicing unit (Figure 14), this device is comprised of U-shaped groove a6, U-shaped groove b7, jack 9 and L plate 18, by jack 9, affects L plate 18 to slide along U-shaped groove.Crystallizer is made a concession servicing unit except L plate 18, and remainder and crystallizer can freely be torn group open, are convenient to maintenance and use.
The thermocouple groove of device for detecting temperature processes in advance on crystallizer, and thermocouple groove is squeezed into crystallizer copper depth of inner cavity 5mm, and thermocouple 16 can freely be torn group connection data collector open so that thermometric.
Diagonal form setting is pressed in the position of alignment pin 17.
Embodiment 2
1, determine crystallizer somatotype scheme, crank crystallizer and conventional axle crystallizer transition die cavity recruitment:
According to Part Drawing Design, go out the somatotype scheme (see figure 3) of wind-powered electricity generation torsional axis crystallizer, torsional axis crystallizer is divided into the opposite opened Split assembled crystallizer of 10,5 joint by crank quantity, somatotype position 19 is divided into joint I 21, joint II 22, joint III 23, joint IV 24 and joint V 25 by this crystallizer.Transition die cavity height is 150mm, and the transition die cavity increasing adopts circular transition to add on crank crystallizer.
2, the design of crystallizer and manufacture
MW level scale wind power torsion shaft electroslag casting, is tightly connected and is formed by upper flange 1, lower flange 2 and legislation blue 13 by inner chamber template 5, water seam plate 11 and water jacket plate 12 with mold structure as shown in Fig. 4 ~ 13.
Water seam plate 11, water jacket plate 12 and legislation blue 13 adopt common A3 steel plate materials to be integrally connected by structure welding mode.Inner chamber template 5 adopts the thick forging forming of copper plate of 20mm.Water seam plate 11 is arranged on the outside of inner chamber template 5, the inner side of water jacket plate 12, and template reinforcement 10 is integrally welded with inner chamber template 5 and water seam plate 11, so just inner chamber template outside is divided into independent water circulation region.In template reinforcement and lacing wire, add respectively section chief 50mm, wide 35mm sees through the thick groove 8 of steel plate, two regions of facing mutually is also all communicated with, to avoid causing this district's water-cooled variation or Non-water-cooled to cause the accident because certain subregion water circulation goes wrong again.
Upper flange 1, lower flange 2 and blue 13 steel plate thickness of making laws are 15mm; Template reinforcement 10, lacing wire thickness are 25mm; Water seam plate 11 is 10mm with water jacket plate 12 thickness.Water-cooled width between inner chamber template 5 and water seam plate 12 is 35mm.This structure of crystallizer makes crystallizer when water flowing is cooling, both can realize the independent water circulation in each district also can realize the associating water circulation of facing mutually region, has improved resistance of deformation and the water-cooled ability of crystallizer.
Water jacket 14 is sleeved on the water seam outer 80mm of plate 11 place, its upper/lower terminal respectively with upper flange 1 and lower flange 2 welded seals.In the bottom of water jacket 14, be installed with 6 (every layer) water inlet pipes 4, on the top of water jacket 14, be installed with 6 (every layer) outlet pipes 3.Water inlet pipe and water outlet pipe respectively on pressing close to lower flange position and with 10 ° of flanged plate angulations.In four regions of water jacket 14 and lacing wire junction, also place respectively two outlet pipes 3.Water inlet pipe 4 and outlet pipe 3, be common steel tube, and all adopt welding manner to be connected with water jacket 14.
Inner chamber template 5 adopts 3D solid die-forging forming to make, and model three-dimensional entity model, then by model conversation mfg. moulding die, finally utilizes mould by monoblock copper coin die-forging forming crystallizer internal cavity template 5.
On crystallizer, arrange and make a concession servicing unit (Figure 15), this device is comprised of U-shaped groove a6, U-shaped groove b7, jack 9 and L plate 18, by jack 9, affects L plate 18 to slide along U-shaped groove.Crystallizer is made a concession servicing unit except L plate 18, and remainder and crystallizer can freely be torn group open, are convenient to maintenance and use.
The thermocouple groove of device for detecting temperature processes in advance on crystallizer, and thermocouple groove is squeezed into crystallizer copper depth of inner cavity 5mm, and thermocouple 16 can freely be torn group connection data collector open so that thermometric.
Diagonal form setting is pressed in the position of alignment pin 17.
Embodiment 3
Wind-driven generator torsional axis is prepared in the crystallizer electroslag smelting casting that adopts embodiment 1 to provide, and its technological parameter is as follows:
Its composition of consutrode adopting and percentage by weight be in Table 1, electrode size: Φ 200 * 13000 mm.
Table 1 GS-18NiMoCr3-6 steel consutrode composition and percentage by weight
| C% | Si% | Mn% | S% | P% | Cr% | Ni% | Mo% | Fe |
| 0.18 | 0.43 | 1.05 | 0.002 | 0.018 | 0.74 | 0.99 | 0.61 | Surplus |
Electroslag smelting casting:
1) electroslag casting process is to above-mentioned consutrode refining, and makes foundry goods.Slag system proportioning is weight percentage: CaF
2: 60%, Al
2o
3: 30%, MgO:5% and CaO:5%.The quantity of slag is 3% of casting weight.
2) mode of igniting
Consutrode adopts solid slag to ignite in crystallizer, and its chemical analysis is weight percentage: TiO
250%, CaF
250%.
3) power consumption parameter:
Different parts (Fig. 4) power consumption parameter, in Table 2, notes keeping the stability of electric current and voltage in fusion-casting process.
4) in torsional axis fusion-casting process, adopt mould temperature control system, to positioning monitoring and temperature in foundry goods different parts fusion-casting process, control.After crank monitoring, there is the theoretical foundation that electrical power is controlled, by foundry goods different parts is adopted to different electrical power, foundry goods is inner and surface quality is good.
5) top of the slag is crossed founding position 24(Fig. 4) middle section 1 hour, crystallizer back-off state, starts jack 9, makes to make a concession crystallizer and makes a concession along U-shaped groove.
Through above-mentioned technical process, produce wind-driven generator torsional axis electroslag smelting casting part.After testing, torsional axis chemical composition is in Table 3:
Table 3 torsional axis chemical composition
| C% | Si% | Mn% | S% | P% | Cr% | Ni% | Mo% | Fe |
| 0.18 | 0.40 | 1.01 | 0.002 | 0.018 | 0.71 | 0.99 | 0.60 | Surplus |
After the founding of MW level wind-powered electricity generation torsional axis, adopt the pre-heat treatment technique, heat treatment temperature is 750 ℃, and foundry goods is cooling with stove.Adopt afterwards anti-deformation and Anti-cracking technique to carry out modifier treatment (quenching 960 ℃, 600 ℃ of tempering).
After torsional axis heat treatment, foundry goods mechanical performance is in Table 4:
Following standard test is pressed in nondestructive inspection:
UT:EN 12680-1-1997(2) inspection area: all
MT:EN 1369-1997(2) inspection area: all
MW class wind turbine uses torsional axis through chemical composition analysis, mechanical properties test, and nondestructiving inspecting test, indices is all qualified.
Claims (7)
1.MW level scale wind power torsion shaft electroslag casting crystallizer, is characterized in that:
Described crystallizer is divided into crank crystallizer and conventional axle crystallizer two parts, the opposite opened Split assembled crystallizer that is divided into 10,5 joint by crank quantity, somatotype position (19) is divided into joint I (21), joint II (22), joint III (23), joint IV (24) and joint V (25) by this crystallizer, crank crystallizer part consists of joint I (21), joint II (22), joint IV (24) and joint V (25), and conventional axle crystallizer is partly joint III (23);
Crystallizer is to consist of the inner chamber template (5) adapting with crank shape, water seam plate (11), water jacket plate (12) and the transition die cavity (15) set up in the thickest position of crank, water seam plate (11) is arranged on the outside of inner chamber template (5), the inner side of water jacket plate (12), between water seam plate (11) and water jacket plate (12), be water jacket (14), water jacket (14) bottom is installed with a plurality of water inlet pipes (4), top is installed with a plurality of outlet pipes (3), water inlet pipe and water outlet pipe respectively on pressing close to lower flange position and with 5 °-15 ° of flanged plate angulations; Inner chamber template (5), water seam plate (11), water jacket plate (12) and water jacket (14) are tightly connected by upper flange (1), lower flange (2) and legislation blue (13); On crank crystallizer, be increased in the transition die cavity (15) of the thickest position of crank and conventional shaft position, transition die cavity (15) is highly 150-300mm, adopts round-corner transition; Described crystallizer has yielding auxiliary equipment, i.e. device for detecting temperature, and described device for detecting temperature is comprised of the thermocouple (16) and the external connection data collector of thermocouple (16) that insert crystallizer internal cavity;
Yielding servicing unit is set on crystallizer, and this device is comprised of U-shaped groove a (6), U-shaped groove b (7), jack (9) and L plate (18), by jack (9), affects L plate (18) along U-shaped groove relative sliding.
2. according to MW level scale wind power torsion shaft electroslag casting crystallizer claimed in claim 1, it is characterized in that: between inner chamber template (5) and water seam plate (11), template reinforcement (10) is set, and be welded into a whole with inner chamber template (5) and water seam plate (11), inner chamber template (5) outside is separated into four regions, each region forms independent water circulation, water seam width between inner chamber template (5) and water seam plate (11) is 15-45mm, even transition.
3. according to MW level scale wind power torsion shaft electroslag casting crystallizer described in claim 2, it is characterized in that: on template reinforcement (10), process the groove (8) of long 20-100mm, wide 15-45mm, make two regional connectivities that face mutually in four regions in inner chamber template (5) outside.
4. according to MW level scale wind power torsion shaft electroslag casting crystallizer described in claim 1 or 2, it is characterized in that: water jacket (14) is installed in the water seam outer 50-100mm of plate (11) place.
5. according to the arbitrary described MW level scale wind power torsion shaft electroslag casting crystallizer of claim 1～3, it is characterized in that: inner chamber template (5) is to adopt 3D solid die-forging forming with whole copper coin, and other position all adopts steel plate.
6. according to MW level scale wind power torsion shaft electroslag casting crystallizer described in claim 5, it is characterized in that: described copper coin is copper plate, thickness is 10-25mm, water seam plate (11) and water jacket plate (12) are made by 10mm steel plate, and upper flange (1), lower flange (2) and legislation blue (13) are made by 15-25mm steel plate.
7. according to claim 1～3,6 arbitrary described MW level scale wind power torsion shaft electroslag casting crystallizers, it is characterized in that: between upper flange (1) and lower flange (2), adopt alignment pin (17) location.
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| CN106862537B (en) * | 2017-02-20 | 2020-03-27 | 潍坊市众诚佳合环保科技股份有限公司 | Goose neck electroslag smelting casting process and crystallizer manufacturing process |
| CN109277540B (en) * | 2017-07-21 | 2020-10-27 | 宝山钢铁股份有限公司 | Positioning and locking system of crystallizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095408C (en) * | 2000-09-29 | 2002-12-04 | 徐登红 | Successive electroslay smelting casting process of crank shaft blank |
| CN100482381C (en) * | 2006-12-12 | 2009-04-29 | 沈阳铸造研究所 | Aluminium alloy crystallizer for electroslag fusion casting of small guide blade |
| CN100549440C (en) * | 2007-02-02 | 2009-10-14 | 天津市三焱电渣钢有限公司 | Make the method for large diameter internal combustion engine crankshaft with electroslag casting-fusing soldering process |
| CN201132211Y (en) * | 2007-09-24 | 2008-10-15 | 沈阳铸造研究所 | Crystallizer for electroslag casting of diaphram pump bent shaft |
| CN202052927U (en) * | 2011-01-26 | 2011-11-30 | 沈阳铸造研究所 | Crystallizer for MW-scale wind power torsion shaft electroslag casting |
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