CN103111606A - Forced cooling method for wind power cast - Google Patents
Forced cooling method for wind power cast Download PDFInfo
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- CN103111606A CN103111606A CN2012102656355A CN201210265635A CN103111606A CN 103111606 A CN103111606 A CN 103111606A CN 2012102656355 A CN2012102656355 A CN 2012102656355A CN 201210265635 A CN201210265635 A CN 201210265635A CN 103111606 A CN103111606 A CN 103111606A
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- wind power
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Abstract
The invention relates to a forced cooling method for a wind power cast, in particular to a forced cooling method for a wind power cast. The method comprises the following steps of manufacturing a heat exchanger, when producing a sand core, embedding core iron into casting san, and placing the heat exchanger into an inner cavity of the sand core; embedding a ceramic pipe communicated with the heat exchanger into the central position of the end face of a core head of the sand core during modeling, and enabling the ceramic pipe to be connected with the outside of a sand box; when the box is closed, after placing the sand core into a cavity, connecting the core iron of the sand core and the ceramic pipe embedded in the cavity through the ceramic pipe, and filling the core sand into the rear portion of the heat exchanger; after the box is closed, communicating the ceramic pipe and a compressed air port through a flexible hose; and during pouring, when iron liquid of the cavity is full, feeding gas into the heat exchanger. The forced cooling method for the wind power cast is unique in process, the cast is cooled through air blowing by utilizing the heat exchanger, heat dissipation of the sand core of the inner cavity is accelerated, iron liquid crusting is accelerated while vibration ramming is utilized to enable the inside of the cast to be compact, and the requirements for flaw detection can be met.
Description
Technical field
The present invention relates to the cooling means in a kind of iron casting process, especially relate to a kind of forced cooling method of wind power casting.
Background technology
Axle class foundry goods is the critical component of connecting engine and base in wind-driven generator, it is cantilever design in generating set, not only bearing from the about weight of 70 tons of generator and impeller, also to bear uncontrollable wind and bring temporary impact load, be the critical component in wind power casting, heavy wall wind-powered electricity generation iron casting apparent size is φ 1330 ~ φ 1800, and length is 2500 ~ 5000mm, belong to the elongate tubular part, ratio of height to diameter is 2 ~ 4.This kind foundry goods radiating condition is the most abominable, and the inherent quality that the zone of pressure and torsional forces will be holed and bear to its foundry goods must reach the UT2 level.After casting pouring, the actual amount of contraction of iron liquid is 0.9 ~ 1.2%, and iron liquid is long-pending to be expanded, and exists shrinkage porosite super but solidify rear foundry goods.
There are flange end in the top of such foundry goods, middle part, bottom, belong to thick large part, and when the wind-powered electricity generation unit is installed, a circle counterbore will be bored in the flange position.The general a large amount of use chills of thick large part are forced cooling to foundry goods, reach the purpose of eliminating the Shinkage and dispersed porosity defective.The inside molding sand of foundry goods is less, and under high temperature liquid iron, the heat radiation of molding sand is very difficult, the chill of placing in fuse is in the condition of high temperature always, therefore the pressure cooling effect of chill reduces greatly, causes shrinkage porosite shrinkage cavity continuous distributed in the middle part of foundry goods, can not satisfy UT flaw detection rank.The way that does not also address this is that at present.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of process unique, utilize heat exchanger blow cooling, accelerate the heat radiation of inner chamber core, iron liquid and accelerate crust and utilize simultaneously vibration ramming to make the foundry goods interior solid, make the foundry goods flaw detection satisfy the forced cooling method of a kind of wind power casting that EN12680.3-2003 UT2 level requires.
In order to realize goal of the invention, the present invention realizes in the following way:
A kind of forced cooling method of wind power casting is characterized in that: it comprises the steps:
A. make heat exchanger;
When b. producing core, core iron is embedded in molding sand, the two ends of core iron spills outside molding sand simultaneously, and namely the end face of the end face of core iron and core is on same, and the two ends that guarantee simultaneously core iron are unimpeded;
C. described heat exchanger is put into the core inner chamber;
D. the earthenware of pre-buried in the end face centre of the core print of core during moulding and 20 ~ 50mm that above-mentioned heat exchanger communicates, earthenware connects outside sandbox;
E. during mould assembling, after above-mentioned core is put into die cavity, by earthenware, pre-buried earthenware in the core iron of core and die cavity is linked together, guarantee between the three it is fully unimpeded;
F. with core sand, reality is added at the rear portion of described heat exchanger;
G. after mould assembling, by flexible pipe with above-mentioned earthenware and compressed air mouth UNICOM;
When h. pouring into a mould, in the time of the iron hydroful of die cavity, gas is passed in described heat exchanger gets final product;
Described heat exchanger is a steel pipe, and is uniform porose on steel tube surface, is welded with the hanging sand bar between the hole, and a circle boss is all welded in the front-end and back-end of steel pipe;
Described steel pipe is than the long 10～20mm of described core, and the diameter of steel pipe is than the little 100～120mm of diameter of described core.
The present invention has following effect:
1) process unique, take full advantage of the compensation rate that the self-expanding of heavy wall spare Graphite Precipitation is shunk iron liquid, make the foundry goods interior solid, the foundry goods flaw detection is satisfied EN12680.3-2003 UT2 level and is required: the forced cooling method of a kind of wind power casting provided by the invention, and it comprises the steps: to make heat exchanger; When producing core, core iron is embedded in molding sand, the two ends of core iron spills outside molding sand simultaneously, and namely the end face of the end face of core iron and core is on same, and the two ends that guarantee simultaneously core iron are unimpeded; Described heat exchanger is put into the core inner chamber; The earthenware of and 20 ~ 50mm that above-mentioned heat exchanger communicate pre-buried in the end face centre of the core print of core during moulding, earthenware connects outside sandbox; During mould assembling, after above-mentioned core is put into die cavity, by earthenware, pre-buried earthenware in the core iron of core and die cavity is linked together, guarantee between the three it is fully unimpeded; With core sand, reality is added at the rear portion of described heat exchanger; After mould assembling, by flexible pipe with above-mentioned earthenware and compressed air mouth UNICOM; During cast, in the time of the iron hydroful of die cavity, gas is passed in described heat exchanger gets final product.With the cooling acceleration inner chamber core heat radiation of heat exchanger air blowing, iron liquid accelerates crust and utilizes simultaneously vibration ramming, take full advantage of the self-expanding of heavy wall spare Graphite Precipitation to the compensation rate that iron liquid shrinks, make the foundry goods interior solid, the requirement of EN12680.3-2003 UT2 level is satisfied in the foundry goods flaw detection.
2) heat exchanger structure is simple, processing and fabricating is convenient: heat exchanger of the present invention is a steel pipe, uniform porose on steel tube surface, be welded with the hanging sand bar between the hole, a circle boss is all welded in the front-end and back-end of steel pipe, and steel pipe length depends on the length of the core that heat exchanger is placed, and the steel pipe overall length is than the long 10～20mm of core, the diameter of steel pipe depends on the diameter of the core of placing, steel pipe is than the little 100～120mm of diameter of core, and steel tube surface interval 120mm～140mm bores 8 hole.The hanging sand bar of spaced surface 180～200mm weldering 10*50, the front-end and back-end welding one circle boss of heat exchanger is used for preventing that the heat exchanger placement is not in place.
Description of drawings
Fig. 1 is the configuration diagram of heat exchanger of the present invention;
Fig. 2 is heat exchanger of the present invention and assembly of sand core structural representation.
The specific embodiment
A kind of forced cooling method of wind power casting, it comprises the steps:
A. make heat exchanger;
When b. producing core, core iron is embedded in molding sand, the two ends of core iron spills outside molding sand simultaneously, and namely the end face of the end face of core iron and core is on same, and the two ends that guarantee simultaneously core iron are unimpeded;
C. as shown in Figure 2: the inner chamber of described heat exchanger 5 being put into core 6;
D. the earthenware 7 of the 20～50mm that communicates at the pre-buried and above-mentioned heat exchanger 5 in end face centre of the core print of core during moulding, earthenware connects outside sandbox;
E. during mould assembling, after above-mentioned core is put into die cavity, by earthenware, pre-buried earthenware in the core iron of core and die cavity is linked together, guarantee between the three it is fully unimpeded;
F. with core sand 8, reality is added at the rear portion of described heat exchanger;
G. after mould assembling, by flexible pipe with above-mentioned earthenware and compressed air mouth UNICOM;
When h. pouring into a mould, in the time of the iron hydroful of die cavity, gas is passed in described heat exchanger gets final product.
As shown in Figure 1: heat exchanger is a steel pipe 1, and steel pipe 1 surface is upper uniform porose 2, is welded with hanging sand bar 3 between hole 2, and a circle boss 4 is all welded in the front-end and back-end of steel pipe 1.
Above-mentioned steel pipe 1 is than the long 10～20mm of described core, and the diameter of steel pipe 1 is than the little 100～120mm of diameter of described core.
Claims (3)
1. the forced cooling method of a wind power casting, it is characterized in that: it comprises the steps:
A. make heat exchanger;
When b. producing core, core iron is embedded in molding sand, the two ends of core iron spills outside molding sand simultaneously, and namely the end face of the end face of core iron and core is on same, and the two ends that guarantee simultaneously core iron are unimpeded;
C. described heat exchanger is put into the core inner chamber;
D. the earthenware of pre-buried in the end face centre of the core print of core during moulding and 20 ~ 50mm that above-mentioned heat exchanger communicates, earthenware connects outside sandbox;
E. during mould assembling, after above-mentioned core is put into die cavity, by earthenware, pre-buried earthenware in the core iron of core and die cavity is linked together, guarantee between the three it is fully unimpeded;
F. with core sand, reality is added at the rear portion of described heat exchanger;
G. after mould assembling, by flexible pipe with above-mentioned earthenware and compressed air mouth UNICOM;
When h. pouring into a mould, in the time of the iron hydroful of die cavity, gas is passed in described heat exchanger gets final product.
2. the forced cooling method of a kind of wind power casting as claimed in claim 1, it is characterized in that: described heat exchanger is a steel pipe (1), on steel pipe (1) surface, uniform porose (2), be welded with hanging sand bar (3) between hole (2), and a circle boss (4) is all welded in the front-end and back-end of steel pipe (1).
3. the forced cooling method of a kind of wind power casting as claimed in claim 1 or 2 is characterized in that: described steel pipe (1) is than the long 10～20mm of described core, and the diameter of steel pipe (1) is than the little 100～120mm of diameter of described core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102656355A CN103111606A (en) | 2012-07-27 | 2012-07-27 | Forced cooling method for wind power cast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102656355A CN103111606A (en) | 2012-07-27 | 2012-07-27 | Forced cooling method for wind power cast |
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| Publication Number | Publication Date |
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| CN103111606A true CN103111606A (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102656355A Pending CN103111606A (en) | 2012-07-27 | 2012-07-27 | Forced cooling method for wind power cast |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874743A (en) * | 2015-06-18 | 2015-09-02 | 大连华锐重工铸业有限公司 | Iron core device for propeller casting |
| CN108838342A (en) * | 2018-07-06 | 2018-11-20 | 大连金河铸造有限公司 | Elevator machine cylinder shrink rule cun control method |
| CN113909439A (en) * | 2021-10-09 | 2022-01-11 | 鹰普航空科技有限公司 | Method capable of solving shrinkage porosity inside investment casting with deep hole structure |
| CN114535514A (en) * | 2022-01-12 | 2022-05-27 | 上海机床铸造一厂（苏州）有限公司 | Cooling method of wind power casting based on air-cooled sand core system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1947892A (en) * | 2006-11-10 | 2007-04-18 | 辽宁福鞍铸业集团有限公司 | Method for quick cooling of resin sand moulding castings |
| CN201609752U (en) * | 2009-12-09 | 2010-10-20 | 宁夏共享铸钢有限公司 | Forced cooling device used in sand casting of large-scale steel castings |
| CN101905307A (en) * | 2010-07-16 | 2010-12-08 | 吴江市液铸液压件铸造有限公司 | Production process for valve body end cap |
| CN102430717A (en) * | 2011-12-31 | 2012-05-02 | 沪东重机有限公司 | Ventilation cooling sand core for casting cylinder jacket of diesel engine and manufacturing method thereof |
-
2012
- 2012-07-27 CN CN2012102656355A patent/CN103111606A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1947892A (en) * | 2006-11-10 | 2007-04-18 | 辽宁福鞍铸业集团有限公司 | Method for quick cooling of resin sand moulding castings |
| CN201609752U (en) * | 2009-12-09 | 2010-10-20 | 宁夏共享铸钢有限公司 | Forced cooling device used in sand casting of large-scale steel castings |
| CN101905307A (en) * | 2010-07-16 | 2010-12-08 | 吴江市液铸液压件铸造有限公司 | Production process for valve body end cap |
| CN102430717A (en) * | 2011-12-31 | 2012-05-02 | 沪东重机有限公司 | Ventilation cooling sand core for casting cylinder jacket of diesel engine and manufacturing method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874743A (en) * | 2015-06-18 | 2015-09-02 | 大连华锐重工铸业有限公司 | Iron core device for propeller casting |
| CN108838342A (en) * | 2018-07-06 | 2018-11-20 | 大连金河铸造有限公司 | Elevator machine cylinder shrink rule cun control method |
| CN113909439A (en) * | 2021-10-09 | 2022-01-11 | 鹰普航空科技有限公司 | Method capable of solving shrinkage porosity inside investment casting with deep hole structure |
| CN114535514A (en) * | 2022-01-12 | 2022-05-27 | 上海机床铸造一厂（苏州）有限公司 | Cooling method of wind power casting based on air-cooled sand core system |
| CN114535514B (en) * | 2022-01-12 | 2023-09-08 | 上海机床铸造一厂（苏州）有限公司 | Cooling method of wind power casting based on air-cooled sand core system |
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Application publication date: 20130522 |