CN206028658U - Box body casting's die cavity structure behind wind generating set - Google Patents
Box body casting's die cavity structure behind wind generating set Download PDFInfo
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- CN206028658U CN206028658U CN201621098160.5U CN201621098160U CN206028658U CN 206028658 U CN206028658 U CN 206028658U CN 201621098160 U CN201621098160 U CN 201621098160U CN 206028658 U CN206028658 U CN 206028658U
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Abstract
The utility model provides a box body casting's die cavity structure behind wind generating set, this structure of includes the gating system, rear cabinet size chamber, set up the gas outlet on rear cabinet size chamber, the gating system include the sprue, with the cross gate of sprue intercommunication, the cross gate more in proper order the intercommunication have that first transition is watered, the second transition is watered, the third transition is watered, the fourth transition is watered, fourth transition water and communicate through flow gate and rear cabinet size chamber, the cross gate on be provided with first buffering and water, the sectional area that first buffering was watered compares for 1: 0.60~0.75 with the sectional area of sprue. Have and to reduce indisputable liquid and fill the steady of type and metal liquid at the turbulent flow that the pouring in -process produced, improve casting quality's stability, reduce clamp sediment defect and gas pocket defect, can satisfy the advantage of high -quality requirement.
Description
Technical field
The present invention relates to the casting field of foundry goods, specifically a kind of cavity structure of nodular iron casting, i.e. wind-driven generator
The cavity structure of group rear box foundry goods.
Background technology
The gear-box of wind power generating set is the important component in Wind turbines, and its major function is in wind by fan blade
The lower produced power of power effect passes to generator, and makes which obtain corresponding rotating speed.The reliability of gear-box is for unit
Safety there is significant impact, and fault recovery cost is also extremely expensive, the 1.5MW machines of 2200 hours it is reported that design year generates electricity
, there is a gear-box significant trouble in group, the high-precision drive apparatus manufacture Group Co., Ltd only gear box arrangement in Nanjing is taken 100
Between ten thousand, such as estimate that 200,000 or so its every restoration costs summation will be left 1,300,000 plus lifting cost, traffic expense, labour cost
It is right.
FDM2 rear box is the gear-box key components and parts of 2.3MW wind power generating sets, appearance and size 1660mm ×
1620mm × 700mm, weight reach 1400kg, and main wall thickness 25mm, most thick wall 165mm, internal structure are complicated, wall thickness variation
Greatly, whole product 100% need to carry out UT MT detections, to ensure the reliable and stable of gear-box quality.The die cavity of FDM2 rear box
Structure generally comprises running gate system, rear box die cavity, the gas outlet being arranged on rear box die cavity；Wherein running gate system, including
Sprue, cross gate, cross gate is again by entering iron in transition running channel backward casing die cavity (i.e. stream enters iron liquid)；Said structure is in reality
There is following weak point in the application process of border：Due to the effect of iron liquid self gravitation, cast early stage enters sprue, cross gate
Interior iron liquid can not be completely filled with, and make to fill that type is unstable, and the metal oxide of generation is floated to together with sulfide, free graphite
Cast(ing) surface, or the dead angle that is trapped in foundry goods and core lower surface etc., dreg defect is also easy to produce in foundry goods；Fill type uneven
Surely can also make molten metal easily be involved in gas in casting process, form gas hole defect in foundry goods, make the matter of rear box foundry goods
Amount is impacted, eventually produces impact to the safety of whole Wind turbines.
The content of the invention
Above-mentioned deficiency of the present invention for prior art, there is provided it is a kind of can reduce iron liquid and fill the unstable and molten metal of type exist
The turbulent flow produced in casting process, improves the stability of casting quality, reduces dreg defect and gas hole defect, can meet high-quality
The cavity structure of the wind power generating set rear box foundry goods of requirement.
For solving above-mentioned technical problem, the technical solution used in the present invention is：A kind of wind power generating set rear box foundry goods
Cavity structure, the structure includes running gate system, rear box die cavity, the gas outlet being arranged on rear box die cavity；Described pours
Injection system includes sprue, the cross gate connected with sprue, and cross gate has been sequentially communicated First Transition running channel, the second transition again
Running channel, the 3rd transition running channel, the 4th transition running channel；The 4th described transition running channel is connected with rear box die cavity by ingate；
The sectional area ratio for being provided with the first buffering running channel, the sectional area of sprue and the first buffering running channel on described cross gate is 1:
0.60～0.75.
Using said structure, due to being provided with the first buffering running channel on cross gate, and the sectional area of sprue and first delays
The sectional area ratio for rushing running channel is 1: 0.60～0.75, i.e., the cross-sectional area of the first buffering running channel is less than the cross section face of sprue
Product so that iron liquid flow section first buffering running channel in narrow, will not quickly to cross gate diffluence, iron liquid will be made directly to pour
It is full of in short time in road, then flows into other positions of running gate system again, it is ensured that fills type in whole sprue steadily, subtract
Few molten metal produces turbulent flow, vortex in sprue or stops, and is not easy to be involved in gas when making to fill type, reduces being involved in foundry goods
Gas hole defect；Meanwhile, fill type steadily, molten iron is not easy to roll, splashed, reduce the secondary oxidation of metal, reduce dreg defect.
Used as improvement, the described sectional area of sprue is 1: 1.5～2 with the sectional area ratio of cross gate.
Used as improvement, the described sectional area of sprue is 1: 0.70～0.80 with the sectional area ratio of First Transition running channel.
Used as improvement, the described sectional area of sprue and the sectional area ratio of the second transition running channel are 1: 1.0～1.1.
Used as improvement, the second described transition running channel is provided with the second buffering running channel, and the sectional area of sprue and second delays
The sectional area ratio for rushing running channel is that the sectional area of the 1: 0.60～0.75, first buffering running channel is with the sectional area ratio of the second buffering running channel
1∶1；Using said structure, iron liquid is made being full of in the short time in the second transition running channel, then flows into other positions of running gate system,
Can ensure that to fill type in whole second transition running channel steady, reduce molten metal produce in the second transition running channel turbulent flow, vortex or
Cutout, is not easy to be involved in when making to fill type gas, reduces and is involved in gas hole defect in foundry goods；Meanwhile, fill type steadily, do not allow molten iron
Easily rolling, splashing, reduce the secondary oxidation of metal, reduce dreg defect.
Present invention defines the sectional area ratio of each running channel, these limit and arrange and arrange reasonable, if ratio is too small,
Iron liquid is flowed over slowly, and filling type can be slow, and thermal losses is excessive, is also easy to produce cold shut defect；If ratio is excessive, does not have buffering and make
With.
As further improving, on described rear box die cavity, be provided with additional gas outlet, additional gas outlet it is a diameter of
20mm～30mm (using it is this may be sized such that casting cleaning when easily remove, and do not increase and can produce Shrinkage cavity defect
New thermal center point)；Using said structure, during iron liquid casting, produced heat passes to form rear box by air or iron liquid
The core of inner chamber, core are discharged by additional gas outlet by thermogenetic gas and type intracavity gas, are reduced when iron liquid fills type
Resistance and core receive secondary oxidation of the thermogenetic gas to iron liquid, make iron liquid fill type steadily, reduce slag inclusion, gas hole defect.
Used as further improving, described sprue, the second transition running channel, the second buffering running channel are refractory pipe,
According to core pipeline, because the impact velocity of the molten iron in gate spool is most fast, impulsive force is maximum, it is likely that washes away sand mold, causes
Unnecessary loss.
Used as improvement, the first described buffering running channel is the structure of depression of facing down from the upper table of cross gate；Described
One transition running channel is with cross gate vertical connection and the binding site of the two is located in the middle part of cross gate.
Used as improvement, one end of the second described transition running channel is provided with the first vertical changeover portion, and the other end is provided with
Two vertical changeover portions, the first described vertical changeover portion are connected to the bottom surface of First Transition running channel, and the second vertical changeover portion connects
It is connected to the bottom surface of the 3rd transition running channel.
Used as improvement, the 4th described transition running channel is two, is connected to the both sides of the 3rd transition running channel, and described
The 4th transition running channel include from being connected with the 3rd buffering scallop that gradually spread of running channel connection end to outer end and with scallop
Curved portions, the upper port of curved portions is ingate, and ingate is connected with rear box die cavity.
80mm-120mm of the first buffering running channel of the present invention apart from sprue Yu cross gate connection end.
Description of the drawings
Fig. 1 is that the schematic diagram of the cavity structure of wind power generating set rear box foundry goods of the present invention (is not provided with annex outlet
Mouthful).
Fig. 2 is the structural representation (being provided with annex gas outlet) of rear box foundry goods die cavity of the present invention.
Fig. 3 is the injection system structure schematic diagram of the cavity structure of wind power generating set rear box foundry goods of the present invention.
Fig. 4 is the injection system structure schematic diagram (bottom surface of the cavity structure of wind power generating set rear box foundry goods of the present invention
It can be seen that).
Specific embodiment
It is new to the present invention with reference to the accompanying drawings and detailed description to be described in further detail.
As illustrated in the accompanying drawings from 1 to 3, as some embodiments：A kind of die cavity of the wind power generating set rear box foundry goods of the present invention
Structure, the structure include running gate system 1, rear box die cavity 2, the gas outlet 3 being arranged on rear box die cavity；Described cast system
System includes sprue 1.1, the cross gate 1.2 connected with sprue, cross gate be sequentially communicated again First Transition running channel 1.3, the
Two transition running channels 1.4, the 3rd transition running channel 1.5, the 4th transition running channel 1.6；The 4th described transition running channel passes through ingate 1.7
Connect with rear box die cavity；The first buffering running channel 4 is provided with described cross gate, and the sectional area of sprue is poured with the first buffering
The sectional area ratio in road is 1: 0.60～0.75.
Using said structure, due to being provided with the first buffering running channel on cross gate, and the sectional area of sprue and first delays
The sectional area ratio for rushing running channel is 1: 0.60～0.75, i.e., the cross-sectional area of the first buffering running channel is less than the cross section face of sprue
Product so that iron liquid flow section first buffering running channel in narrow, will not quickly to cross gate diffluence, iron liquid will be made directly to pour
It is full of in short time in road, then flows into other positions of running gate system again, it is ensured that fills type in whole sprue steadily, subtract
Few molten metal produces turbulent flow, vortex in sprue or stops, and is not easy to be involved in gas when making to fill type, reduces being involved in foundry goods
Gas hole defect；Meanwhile, fill type steadily, molten iron is not easy to roll, splashed, reduce the secondary oxidation of metal, reduce dreg defect.
Used as embodiment, the described sectional area of sprue is 1: 1.5～2 with the sectional area ratio of cross gate.
As embodiment, the described sectional area of sprue and the sectional area ratio of First Transition running channel be 1: 0.70～
0.80。
Used as embodiment, the described sectional area of sprue and the sectional area ratio of the second transition running channel are 1: 1.0～1.1.
As embodiment, as shown in accompanying drawing 3-4, the second described transition running channel is provided with the second buffering running channel 5, and directly pours
The sectional area ratio of the sectional area in road and the second buffering running channel is that the sectional area of the 1: 0.60～0.75, first buffering running channel and second are slow
The sectional area ratio for rushing running channel is 1: 1；Using said structure, iron liquid is made being full of in the short time in the second transition running channel, then flowed into
Other positions of running gate system, it is ensured that fill type in whole second transition running channel steadily, reduce molten metal and pour in the second transition
Turbulent flow, vortex is produced in road or is stopped, be not easy to be involved in gas when making to fill type, be involved in the defect of pore in reducing foundry goods；Meanwhile,
Fill type steady, molten iron is not easy to roll, splashed, reduce the secondary oxidation of metal, reduce dreg defect.
Present invention defines the sectional area ratio of each running channel, these limit and arrange and arrange reasonable, if ratio is too small,
Iron liquid is flowed over slowly, and filling type can be slow, and thermal losses is excessive, is also easy to produce cold shut defect；If ratio is excessive, does not have buffering and make
With.
As shown in Figure 2：As some embodiments, on described rear box die cavity, additional gas outlet 3.1 is provided with, is added
Gas outlet a diameter of 20mm～30mm (using it is this may be sized such that casting cleaning when easily remove, and do not increase and can produce
The new thermal center point of raw Shrinkage cavity defect), the position of additional gas outlet is located at the inner ring of original gas outlet, namely rear box die cavity
On the end face of axial inner part；Using said structure, during iron liquid casting, produced heat passes through air or iron liquid is passed
The core to form rear cabinet intracoelomic cavity is passed, core is discharged by additional gas outlet by thermogenetic gas and type intracavity gas, subtracted
Resistance and core when few iron liquid fills type receives secondary oxidation of the thermogenetic gas to iron liquid, and type is steady to fill iron liquid, and reduction is pressed from both sides
Slag, gas hole defect.
Used as embodiment, described sprue, the second transition running channel, the second buffering running channel are refractory pipe, according to
Core pipeline, because the impact velocity of the molten iron in gate spool is most fast, impulsive force is maximum, it is likely that washes away sand mold, causes unnecessary
Loss.
Used as embodiment, the described lower end of sprue is connected with one end of cross gate, and sprue and cross gate are mutual
Vertically.
Used as embodiment, the first described buffering running channel is the structure of depression of facing down from the upper table of cross gate；Described
First Transition running channel is with cross gate vertical connection and the binding site of the two is located in the middle part of cross gate.
As shown in Figure 4, as embodiment, one end of the second described transition running channel 1.4 arranges the first vertical changeover portion
1.41, the other end is provided with the second vertical changeover portion 1.42, and the first described vertical changeover portion is connected to First Transition running channel
Bottom surface, the second vertical changeover portion are connected to the bottom surface of the 3rd transition running channel.
As, embodiment, the 4th described transition running channel is two, is connected to the both sides of the 3rd buffering running channel, and
The 4th described transition running channel is included from the scallop and and scallop gradually spread with the 3rd buffering running channel connection end to outer end
The curved portions of connection, the upper port of curved portions is ingate, and ingate is connected with rear box die cavity.
The first buffering running channel of the present invention is connected with each other the distance of end 80mm-120mm apart from sprue and cross gate；Specifically
Can adopt 100mm.
The first buffering running channel of the present invention and the second buffering running channel, are long in original cross gate and the second transition running channel
In the case that degree is constant, the another segment length for adding.
By the enforcement of the present invention, it is steady that iron liquid fills type, reduces slag inclusion, gas hole defect, it is ensured that casting quality is stablized.
Claims (9)
1. a kind of cavity structure of wind power generating set rear box foundry goods, the structure include running gate system, rear box die cavity, setting
Gas outlet on rear box die cavity；Described running gate system includes sprue, the cross gate connected with sprue, and cross gate is again
It has been sequentially communicated First Transition running channel, the second transition running channel, the 3rd transition running channel, the 4th transition running channel；The 4th described transition
Running channel is connected with rear box die cavity by ingate；The first buffering running channel, the section of sprue is provided with described cross gate
Product is 1: 0.60～0.75 with the ratio of the sectional area of the first buffering running channel.
2. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：Described is straight
The sectional area of running channel is 1: 1.5～2 with the sectional area ratio of cross gate.
3. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：Described is straight
The sectional area of running channel is 1: 0.70～0.80 with the sectional area ratio of First Transition running channel.
4. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：Described is straight
The sectional area ratio of the sectional area of running channel and the second transition running channel is 1: 1.0～1.1.
5. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：Described
It is 1: 0.60 that two transition running channels are provided with the ratio of the sectional area of the second buffering running channel, the sectional area of sprue and the second buffering running channel
The sectional area ratio of the sectional area of the～0.75, second buffering running channel and the first buffering running channel is 1: 1.
6. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：After described
Additional gas outlet, a diameter of 20mm～30mm of additional gas outlet is provided with casing die cavity.
7. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：Described is straight
Running channel, the second transition running channel, the second buffering running channel are refractory pipe.
8. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：Described
One buffering running channel is the structure of depression of facing down from the upper table of cross gate；One end of the second described transition running channel is provided with first
Vertical changeover portion, the other end are provided with the second vertical changeover portion, and the first described vertical changeover portion is connected to First Transition running channel
Bottom surface, the second vertical changeover portion is connected to the bottom surface of the 3rd transition running channel.
9. the cavity structure of wind power generating set rear box foundry goods according to claim 1, it is characterised in that：Described
Four transition running channels are two, are connected to the both sides of the 3rd transition running channel, and the 4th described transition running channel is included from the
Three buffer scallop and the curved portions being connected with scallop that running channel connection end to outer ends are gradually spread, and the upper port of curved portions is
Ingate, ingate are connected with rear box die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621098160.5U CN206028658U (en) | 2016-09-30 | 2016-09-30 | Box body casting's die cavity structure behind wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621098160.5U CN206028658U (en) | 2016-09-30 | 2016-09-30 | Box body casting's die cavity structure behind wind generating set |
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| Publication Number | Publication Date |
|---|---|
| CN206028658U true CN206028658U (en) | 2017-03-22 |
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ID=58297667
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621098160.5U Active CN206028658U (en) | 2016-09-30 | 2016-09-30 | Box body casting's die cavity structure behind wind generating set |
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| CN (1) | CN206028658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940128A (en) * | 2019-04-29 | 2019-06-28 | 湖南诚今电梯部件制造有限公司 | Resin sand magnesium iron non-riser casting die |
-
2016
- 2016-09-30 CN CN201621098160.5U patent/CN206028658U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940128A (en) * | 2019-04-29 | 2019-06-28 | 湖南诚今电梯部件制造有限公司 | Resin sand magnesium iron non-riser casting die |
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| GR01 | Patent grant |