CN101274354A - Casting parts structure of electricity generator cast steel shaft bushing and casting method thereof - Google Patents
Casting parts structure of electricity generator cast steel shaft bushing and casting method thereof Download PDFInfo
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- CN101274354A CN101274354A CNA2007100385659A CN200710038565A CN101274354A CN 101274354 A CN101274354 A CN 101274354A CN A2007100385659 A CNA2007100385659 A CN A2007100385659A CN 200710038565 A CN200710038565 A CN 200710038565A CN 101274354 A CN101274354 A CN 101274354A
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Abstract
The invention discloses a casting product structure of a steel-cast gap block of an electric generator and a casting method thereof. The steel-cast gap block is a semicircle cylinder with a spherical zone surface, an inner tiling surface and a commissure surface, the spherical zone surface of the steel-cast gap block is positioned at the top of the casting product, the commissure surface of the steel-cast gap block is positioned at the bottom of the casting product, and a shrink head of the casting product is arranged at the center of the spherical zone surface that is positioned at the top of the casting product. The casting method comprises the following steps: molding and core making, raw material smelting, pouring, cleaning of the casting product, rough processing of the casting product and stress annealing, wherein, the pouring takes a bottom pouring way, and a pouring gate is positioned at the center of the inner tiling surface. The casting product structure of the steel-cast gap block of the electric generator and the casting method of the invention arrange the shrink head of the casting product on the spherical zone surface that is positioned at the top of the casting product and position the inner tiling surface downward; furthermore, the pouring takes the bottom pouring way, and foreign matters of gases are easy to float upward when pouring, thus ensuring the casting quality of the inner tiling surface; the commissure surface is downward and is positioned at the bottom of the casting product, thus ensuring the material quality of matching surfaces of the gap blocks and the processing precision.
Description
Technical field
The present invention relates to a kind of casting of metals structure and casting method, be specifically related to the casting structure and the casting method thereof of electricity generator cast steel shaft bushing.
Technical background
The generator bearing shell is big and abundant semicircular ring opposite opened part, generally by bronze or iron casting, but shape less complex, because bearing shell is the critical support parts that generator runs well, its outer surface has the spherical zone face that matches with bearing block, bearing cap, roughness reaches Ra0.8, and dimensional accuracy is 0.05mm.Interior tiling need be poured into a mould babbit, has any casting flaw all can influence the adhesion between babbit and the bearing shell body and causes shelling, coheres bad phenomenon.The more important thing is that generator is starting and the stoppage in transit stage, bearing shell needs the pump hydraulic oil, produces wearing and tearing to prevent main shaft and bearing shell, so bearing shell body work in-process need testing high voltage degree, promptly applies the high-pressure pump oil of 3MPa, and the bearing shell body does not leak after 15 minutes.At the characteristics of above-mentioned cast steel shaft bushing, the specification requirement of cast steel shaft bushing is high.In casting field, rising head is to mix as exhaust, feeding, collection, be that most gases in gas in the die cavity and various husky core, the molten metal all eject from rising head, molten metal after the contraction of foundry goods each several part is all replenished by rising head, enter on burning slag inclusion in the die cavity etc. and float in the rising head, after casting is finished, need the rising head sawing is fallen, to obtain the good foundry goods of internal organizational structure.Therefore how making the castability of bearing shell reach optimum with the foundry goods at each face of generator bearing shell, is the problem of insider's hammer away.
Summary of the invention
The objective of the invention is to is to overcome the deficiencies in the prior art, and the casting structure and the casting method thereof of the reliable electricity generator cast steel shaft bushing of castability in a kind of interior tiling that can make bearing shell and high-pressure oil pipe zone is provided.
The technical scheme that realizes above-mentioned purpose is: a kind of casting structure of electricity generator cast steel shaft bushing, described cast steel shaft bushing is one to have the semicircle annulated column of spherical zone face, interior tiling and joint close face, the spherical zone face of described cast steel shaft bushing is in the top of foundry goods and the joint close face of cast steel shaft bushing is in the bottom of foundry goods, and the rising head of this foundry goods is arranged on the spherical zone face central authorities of cast top.
The casting structure of above-mentioned electricity generator cast steel shaft bushing, wherein, described foundry goods is in that after heat treatment cast(ing) surface is smooth, the slag inclusion of the cast(ing) surface of fluoroscopic examination and the maximum gauge of pore are less than 3 millimeters, the quantity of slag inclusion and pore is no more than 3 on 25 square centimeters surface, and the distance between slag inclusion and the pore leaves on the spherical zone face of foundry goods, interior tiling and the joint close face and removes described slag inclusion and postspiracular accurately machined surplus greater than 15 millimeters.
The processing method of above-mentioned electricity generator cast steel shaft bushing, wherein, the allowance for finish of tiling is 0.2～0.5mm in the described foundry goods, the allowance for finish of described foundry goods spherical zone face is 0.2～0.5mm.
The technical scheme that realizes above-mentioned purpose is: a kind of electricity generator cast steel shaft bushing and casting method, the primary raw material of foundry goods comprises manganese steel, silicon steel, carbon, its casting method comprises the following steps: molding and core making, raw material melting, cast, casting cleaning, foundry goods roughing, stress annealing, wherein, pouring type is a bottom filling, and the sprue gate is positioned at the central authorities of tiling.
Owing to adopted the casting structure and the casting method thereof of electricity generator cast steel shaft bushing of the present invention, the rising head that is about to foundry goods is arranged on the spherical zone face of cast top, interior tiling is positioned at downwards, again because of pouring procedure is a bottom filling, gas during cast, impurity floats easily, therefore the castability of tiling in can guaranteeing, because joint close faces down and is positioned at the bottom of foundry goods, can guarantee the material of bearing shell mating surface again, guarantee machining accuracy.
Description of drawings
Fig. 1 is the schematic diagram of the casting structure of electricity generator cast steel shaft bushing of the present invention.
The specific embodiment
See also Fig. 1, the casting structure of a kind of electricity generator cast steel shaft bushing of the present invention, cast steel shaft bushing is one to have the semicircle annulated column of spherical zone face 11, interior tiling 12 and joint close face 13, characteristics of the present invention are: the spherical zone face 11 of cast steel shaft bushing is in the top of foundry goods 1 and the joint close face 13 of cast steel shaft bushing is in the bottom of foundry goods 1, and the rising head 10 of this foundry goods 1 is arranged on spherical zone face 11 central authorities at foundry goods 1 top.
A kind of electricity generator cast steel shaft bushing of the present invention and method for casting, the primary raw material of foundry goods 1 comprises manganese steel, silicon steel, carbon, its casting method comprises the following steps: molding and core making, raw material melting, cast, foundry goods 1 cleaning, foundry goods 1 roughing, stress annealing, wherein pouring type is a bottom filling, and the sprue gate is positioned at the central authorities of tiling 12.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique, under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (4)
1. the casting structure of an electricity generator cast steel shaft bushing, described cast steel shaft bushing is one to have the semicircle annulated column of spherical zone face, interior tiling and joint close face, it is characterized in that, the spherical zone face of described cast steel shaft bushing is in the top of foundry goods and the joint close face of cast steel shaft bushing is in the bottom of foundry goods, and the rising head of this foundry goods is arranged on the spherical zone face central authorities of cast top.
2. the casting structure of electricity generator cast steel shaft bushing according to claim 1, it is characterized in that, described foundry goods is in that after heat treatment cast(ing) surface is smooth, the slag inclusion of the cast(ing) surface of fluoroscopic examination and the maximum gauge of pore are less than 3 millimeters, the quantity of slag inclusion and pore is no more than 3 on 25 square centimeters surface, and the distance between slag inclusion and the pore leaves on the spherical zone face of foundry goods, interior tiling and the joint close face and removes described slag inclusion and postspiracular accurately machined surplus greater than 15 millimeters.
3. the processing method of electricity generator cast steel shaft bushing according to claim 2 is characterized in that, the allowance for finish of tiling is 0.2～0.5mm in the described foundry goods, and the allowance for finish of described foundry goods spherical zone face is 0.2～0.5mm.
4. electricity generator cast steel shaft bushing and casting method, the primary raw material of foundry goods comprises manganese steel, silicon steel, carbon, its casting method comprises the following steps: molding and core making, raw material melting, cast, casting cleaning, foundry goods roughing, stress annealing, wherein, pouring type is a bottom filling, and the sprue gate is positioned at the central authorities of tiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100385659A CN101274354A (en) | 2007-03-28 | 2007-03-28 | Casting parts structure of electricity generator cast steel shaft bushing and casting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100385659A CN101274354A (en) | 2007-03-28 | 2007-03-28 | Casting parts structure of electricity generator cast steel shaft bushing and casting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101274354A true CN101274354A (en) | 2008-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100385659A Pending CN101274354A (en) | 2007-03-28 | 2007-03-28 | Casting parts structure of electricity generator cast steel shaft bushing and casting method thereof |
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| CN (1) | CN101274354A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972069A (en) * | 2015-07-23 | 2015-10-14 | 乐山沙湾天华机械制造有限责任公司 | Gland casing casting mold |
-
2007
- 2007-03-28 CN CNA2007100385659A patent/CN101274354A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972069A (en) * | 2015-07-23 | 2015-10-14 | 乐山沙湾天华机械制造有限责任公司 | Gland casing casting mold |
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Open date: 20081001 |