CN1146384A - Spun casting method for cast-aluminium rotor of large-size electric motor - Google Patents
Spun casting method for cast-aluminium rotor of large-size electric motor Download PDFInfo
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- CN1146384A CN1146384A CN 95112030 CN95112030A CN1146384A CN 1146384 A CN1146384 A CN 1146384A CN 95112030 CN95112030 CN 95112030 CN 95112030 A CN95112030 A CN 95112030A CN 1146384 A CN1146384 A CN 1146384A
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- centrifuge
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Abstract
The present invention relates to a kind of centrifugal casting method for producing cast aluminium rotor of large-size electric motor. The aluminium melt must be undergone the refining processing by the non-toxic refining agent. The iron core and die-assembly are preheated separately, the preheating time for iron core is 4-5 hr. under 400-500 deg.C. The preheating temperature is 400-500 deg.C for upper die and 200-250 deg.C for lower die and the preheating time is 2-3 hr.. Then it is made up by cast moulding on the centrifuger. The rotor made by said invention features strong rigidity, good heat conductivity, uniform distribution of temp. of rotor, so that the service life of motor is long.
Description
The present invention relates to a kind of process of centrifugal casting Large Rotor, belong to metal casting.
At present the large and medium-sized cage rotor motor of making all adopts the copper bar structure, is welded by sliver and end ring, and it is fixing in iron core slot sliver therefore to occur, produces vibration, at the motor heavy load, sliver was easily overheated when starting was frequent; Be in operation, sliver and end ring are subjected to multiple factors such as centrifugal force, electromagnetic force and thermal stress be inhomogeneous, and bar failure, weld seam fault such as snap and often take place, and causing stops production has a power failure, and brings great economic loss.
The objective of the invention is provides a kind of large-size machine cast-aluminum rotor with the method for centrifugal casting, with the bar failure that solves the appearance of large-size machine copper bar construction rotor, the problem that weld seam snaps.
The present invention realizes with following technical scheme:
With the QR270 tilting resistance furnace melting of fine aluminium ingot, molten aluminium liquid impurity content requirement is: Fe-0.36～0.45%, Si-0.12～0.15%, Fe+Si＜0.5%.The aluminium liquid of cast carries out refining treatment with nontoxic refining agent, is incubated slagging-off cast after 10～20 minutes, smelting temperature: 760～780 ℃, and pouring temperature: 760 ℃ ± 10 ℃.
Iron core preheating: by weight, length and pressure three elements require to laminate qualified iron core, preheating in the preheating furnace of packing into.Iron core preheating time is 4～5 hours, and preheat temperature is 400～500 ℃, and preheating furnace is a car-type flame reverberatory furnace.
Cast-aluminum die structure and preheating: cast-aluminum die is made up of upper die and lower die.Gate location is located at patrix end ring inboard.Its sectional area must satisfy the feeding requirement.General section must not amass less than 3/4 of the inboard area of end ring.Upper and lower mould will be provided with steam vent, and the ratio of the height and width of end ring sectional area is less than or equal to 1.Preheat temperature is 90～110 ℃ before using, spraying ZnO, waterglass and H
2After the O mixed liquor (ZnO:9～11%, waterglass: 3～5%, all the other are water), mould is preheating once more, and patrix is 400～500 ℃, and counterdie is 200～250 ℃, 2～3 hours preheating time.
The rotor casting process: after performing above-mentioned preparation, the iron core that preheating is good, mould reach the sequencing clamping on request on the infinite variable speed big centrifuge of homemade mechanical grip.Centrifugal rotational speed is selected according to rotor diameter size and practical experience.General rotor diameter φ 520～650mm, rotating speed is 150～230 rev/mins, φ 700～990mm, rotating speed are 120～150 rev/mins.
Pouring procedure: the reduction of speed casting is adopted in the cast of aluminium liquid.Promptly starting centrifuge makes its centrifugal rotational speed a little less than the regulation rotating speed; the centrifuge decelerates rotation of outage back; cast aluminum liquid; when having watered 2/3 aluminium liquid; restart centrifuge and reach full gear, watered remaining aluminium liquid continuously, the full gear rotation is 50～70 seconds again; treat that aluminium liquid all solidifies the back and shuts down form removal, must be noted that in casting process and must not stop.
The present invention makes large-scale cast-aluminum rotor and compares with the large rotor of prior art copper bar structure and have following advantage:
1,, strengthens the large rotor rigidity because of iron core, sliver and end ring are cast as integral body;
2, improved from the capacity of heat transmission of rotor bar, reduced rotor temperature rise and improved motor service life to iron core;
3, can select any flute profile, improve startability;
4, designed a plurality of ventilating ducts in core interior, temperature of rotor is evenly distributed.
Embodiment 1:
YK3200-2/1180 type rotor, its iron core outside dimension 560mm, internal diameter size 300mm, total length 960mm, the high 80mm in end ring cross section, wide 90mm.With 100 ℃ of upper and lower mould and die preheatings, spray ZnO: waterglass: the mixed liquor of water, its cooperation ratio (10%: 4%, all the other are water) earlier.Then, mould is preheating once more, 450 ℃ of patrix temperature, 3 hours time, 200 ℃ of counterdie temperature, 2 hours time, 450 ℃ of iron core preheat temperatures, 4 hours time, 765 ℃ of temperature of aluminum liquid.Then; with mould, iron core in order, the technological requirement clamping is on infinite variable speed big centrifuge; centrifuge speed is 200 rev/mins, after the outage, and the centrifuge decelerates rotation; cast aluminum liquid; when having watered 2/3, restart centrifuge, watered remaining aluminium liquid continuously; full gear rotation 60 seconds treats that aluminium liquid all solidifies the back and shuts down form removal.Aluminium liquid must not stop in casting process.
Embodiment 2:
Y800-2-10 type rotor, its iron core outside dimension φ 990mm, internal diameter size φ 710mm, total length 900mm, the high 60mm in end ring cross section, wide 60mm.100 ℃ of mould elder generation preheatings, spraying ZnO: waterglass: the mixed liquor of water, its cooperation ratio are (10%: 4%, all the other are water).Mould is placed on preheating in the preheating furnace once more, 450 ℃ of patrix temperature, 3 hours time, 200 ℃ of counterdie temperature, 2.5 hours time, 460 ℃ of iron core preheat temperatures, 5 hours time, 760 ℃ of temperature of aluminum liquid.Then; with mould, iron core by process sequence requirement clamping on infinite variable speed big centrifuge; centrifuge speed is 135 rev/mins, after the outage, and the centrifuge decelerates rotation; cast aluminum liquid; when having watered 2/3, restart centrifuge, watered remaining aluminium liquid continuously; full gear rotation 60 seconds treats that aluminium liquid all solidifies the back and shuts down form removal.Aluminium liquid must not stop in casting process.
The motor YK3200-2/1180 of the cast aluminium structure of producing with the inventive method and the motor of copper bar structure of the same type, its experiment effect is as follows:
The most technical performances of cast aluminium structural electromotor are better than or are equivalent to the motor of copper bar structure as can be seen from the above table, just are lower than the copper bar structure aspect temperature rise.
1～20,000 yuan of every cost of the motor of cast aluminium structure of the present invention, overall performance is good, Reliable, as avoided bar failure, to snap disadvantage, the rotor dispersing good in thermal property is simplified Manufacturing process, shorten the outstanding feature such as production cycle.
Claims (1)
1, a kind of method of centrifugal casting large-size machine cast-aluminum rotor, it is characterized in that the fine aluminium ingot is smelted into aluminium liquid, its impurity content requires: Fe-0.36～0.45%, Si-0.12～0.15%, Fe+Si＜0.5%, and carry out refining treatment with nontoxic refining agent, be incubated cast after 10～20 minutes, smelting temperature: 760～780 ℃, pouring temperature: 760 ℃ ± 10 ℃, will be by weight, length and pressure three elements require to laminate qualified iron core, preheating in the preheating furnace of packing into, and iron core preheating time is 4～5 hours, preheat temperature is 400～500 ℃, cast-aluminum die divides upper die and lower die, and gate location is located at patrix end ring inboard, and the ratio of the height and width of end ring sectional area is less than or equal to 1.Before using earlier with mould and die preheating to 90～110 ℃, spraying ZnO, waterglass and H
2The O mixed liquor, its cooperation ratio is (ZnO:9～11%, waterglass: 3～5%, all the other are water), after the spraying mixed liquor, mould is preheating once more, patrix is 400～500 ℃, and counterdie is 200～250 ℃, 2～3 hours time, the iron core that preheating is good, mould reach the sequencing clamping on request on infinite variable speed big centrifuge, and centrifugal rotational speed is selected according to the rotor diameter size.General rotor diameter φ 520～650mm, rotating speed is 150～230 rev/mins, φ 700～990mm; rotating speed is 120～150 rev/mins, the starting centrifuge after a little less than the regulation rotating speed, after the outage; the centrifuge decelerates rotation; cast aluminum liquid when having watered 2/3 aluminium liquid, is restarted centrifuge; watered remaining aluminium liquid continuously; the full gear rotation is 50～70 seconds again, treats that aluminium liquid all solidifies the back and shuts down form removal, must be noted that in casting process and must not stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112030A CN1054559C (en) | 1995-09-28 | 1995-09-28 | Spun casting method for cast-aluminium rotor of large-size electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112030A CN1054559C (en) | 1995-09-28 | 1995-09-28 | Spun casting method for cast-aluminium rotor of large-size electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1146384A true CN1146384A (en) | 1997-04-02 |
| CN1054559C CN1054559C (en) | 2000-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95112030A Expired - Fee Related CN1054559C (en) | 1995-09-28 | 1995-09-28 | Spun casting method for cast-aluminium rotor of large-size electric motor |
Country Status (1)
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| CN (1) | CN1054559C (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423414C (en) * | 2006-07-25 | 2008-10-01 | 周西省 | Casting process of copper squirrel rotor |
| CN100493777C (en) * | 2007-08-24 | 2009-06-03 | 云南铜业压铸科技有限公司 | Die-casting method of induction motor copper cage rotor and die casting device thereof |
| CN102133622A (en) * | 2011-03-01 | 2011-07-27 | 宁波旭升机械有限公司 | Aluminum casting and spraying process |
| CN102430734A (en) * | 2011-12-08 | 2012-05-02 | 湘潭电机股份有限公司 | Centrifugal aluminium casting method of cage type rotor of motor |
| CN102632214A (en) * | 2012-04-30 | 2012-08-15 | 杭州富生电器有限公司 | Technology for casting motor rotor of refrigeration compressor |
| CN102651590A (en) * | 2011-02-23 | 2012-08-29 | 通用汽车环球科技运作有限责任公司 | Method of manufacturing an end ring over pre-formed conductor bars of a rotor for an electric device |
| CN102861896A (en) * | 2012-08-31 | 2013-01-09 | 河北电机股份有限公司 | Insulation aluminum casting process for motor rotor slot |
| CN103066764A (en) * | 2011-10-18 | 2013-04-24 | 通用汽车环球科技运作有限责任公司 | Cast rotor and method |
| CN103231018A (en) * | 2013-04-24 | 2013-08-07 | 新绛县祥和机械有限公司 | Casting mold and casting method for tractor rotor part |
| CN104505993A (en) * | 2015-01-28 | 2015-04-08 | 河北瑞兆激光电机修复有限公司 | Cage asynchronous motor repairing method |
| CN105081258A (en) * | 2015-08-24 | 2015-11-25 | 浙江格兰德机械有限公司 | Rotor forming machining method |
| CN107196470A (en) * | 2017-07-14 | 2017-09-22 | 芜湖乾凯材料科技有限公司 | Electric machine iron core and its preparation technology with very good mechanical properties |
| CN107742953A (en) * | 2017-11-24 | 2018-02-27 | 佛山市卓能电机技术有限公司 | Rotor and its casting technique |
| CN113145819A (en) * | 2021-04-29 | 2021-07-23 | 杭州富生电器有限公司 | Heating casting device and method for casting large rotor iron core |
| CN114850435A (en) * | 2022-03-25 | 2022-08-05 | 苏州南新电机有限公司 | Casting process and casting equipment for squirrel cage rotor |
| CN117206485A (en) * | 2023-09-12 | 2023-12-12 | 河南永荣动力股份有限公司 | Automatic centrifugal casting production device for stator and rotor of motor and control method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107621A (en) * | 1994-02-22 | 1995-08-30 | 李大顺 | Method for casting aluminium on iron core of rotor of motor |
-
1995
- 1995-09-28 CN CN95112030A patent/CN1054559C/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423414C (en) * | 2006-07-25 | 2008-10-01 | 周西省 | Casting process of copper squirrel rotor |
| CN100493777C (en) * | 2007-08-24 | 2009-06-03 | 云南铜业压铸科技有限公司 | Die-casting method of induction motor copper cage rotor and die casting device thereof |
| CN102651590A (en) * | 2011-02-23 | 2012-08-29 | 通用汽车环球科技运作有限责任公司 | Method of manufacturing an end ring over pre-formed conductor bars of a rotor for an electric device |
| CN102651590B (en) * | 2011-02-23 | 2014-09-10 | 通用汽车环球科技运作有限责任公司 | Method of manufacturing an end ring over pre-formed conductor bars of a rotor for an electric device |
| CN102133622A (en) * | 2011-03-01 | 2011-07-27 | 宁波旭升机械有限公司 | Aluminum casting and spraying process |
| US8925182B2 (en) | 2011-10-18 | 2015-01-06 | GM Global Technology Operations LLC | Cast rotor and method |
| CN103066764B (en) * | 2011-10-18 | 2016-04-06 | 通用汽车环球科技运作有限责任公司 | Cast rotor and method |
| CN103066764A (en) * | 2011-10-18 | 2013-04-24 | 通用汽车环球科技运作有限责任公司 | Cast rotor and method |
| CN102430734A (en) * | 2011-12-08 | 2012-05-02 | 湘潭电机股份有限公司 | Centrifugal aluminium casting method of cage type rotor of motor |
| CN102632214A (en) * | 2012-04-30 | 2012-08-15 | 杭州富生电器有限公司 | Technology for casting motor rotor of refrigeration compressor |
| CN102861896A (en) * | 2012-08-31 | 2013-01-09 | 河北电机股份有限公司 | Insulation aluminum casting process for motor rotor slot |
| CN103231018A (en) * | 2013-04-24 | 2013-08-07 | 新绛县祥和机械有限公司 | Casting mold and casting method for tractor rotor part |
| CN104505993A (en) * | 2015-01-28 | 2015-04-08 | 河北瑞兆激光电机修复有限公司 | Cage asynchronous motor repairing method |
| CN105081258A (en) * | 2015-08-24 | 2015-11-25 | 浙江格兰德机械有限公司 | Rotor forming machining method |
| CN107196470A (en) * | 2017-07-14 | 2017-09-22 | 芜湖乾凯材料科技有限公司 | Electric machine iron core and its preparation technology with very good mechanical properties |
| CN107742953A (en) * | 2017-11-24 | 2018-02-27 | 佛山市卓能电机技术有限公司 | Rotor and its casting technique |
| CN113145819A (en) * | 2021-04-29 | 2021-07-23 | 杭州富生电器有限公司 | Heating casting device and method for casting large rotor iron core |
| CN114850435A (en) * | 2022-03-25 | 2022-08-05 | 苏州南新电机有限公司 | Casting process and casting equipment for squirrel cage rotor |
| CN114850435B (en) * | 2022-03-25 | 2023-09-26 | 苏州南新电机有限公司 | Squirrel-cage rotor casting process and casting equipment |
| CN117206485A (en) * | 2023-09-12 | 2023-12-12 | 河南永荣动力股份有限公司 | Automatic centrifugal casting production device for stator and rotor of motor and control method thereof |
| CN117206485B (en) * | 2023-09-12 | 2024-06-07 | 河南永荣动力股份有限公司 | Automatic centrifugal casting production device for stator and rotor of motor and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN1054559C (en) | 2000-07-19 |
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Owner name: SHENYANG ELECTRIC CO., LTD. Free format text: FORMER OWNER: SHENYANG ELECTRIC MOTOR FACTORY Effective date: 20070216 |
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Effective date of registration: 20070216 Address after: 110026, No. 20, Wei Bei street, Tiexi District, Liaoning, Shenyang Patentee after: Shenyang electric Limited by Share Ltd Address before: 110026, No. 20, Wei Bei street, Tiexi District, Liaoning, Shenyang Patentee before: Shenyang Electric Motor Factory |
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Granted publication date: 20000719 Termination date: 20110928 |