CN201900135U - Direct-current bus type alternating-current variable-frequency transmission device of four-roller plate strip mill - Google Patents
Direct-current bus type alternating-current variable-frequency transmission device of four-roller plate strip mill Download PDFInfo
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- CN201900135U CN201900135U CN2010206611858U CN201020661185U CN201900135U CN 201900135 U CN201900135 U CN 201900135U CN 2010206611858 U CN2010206611858 U CN 2010206611858U CN 201020661185 U CN201020661185 U CN 201020661185U CN 201900135 U CN201900135 U CN 201900135U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a direct-current bus type alternating-current variable-frequency transmission device of a four-roller plate strip mill. A transmission part comprises an uncoiler, a five-roller straightener, a left coiling machine, a main rolling mill, a right coiling machine and a coil stripping machine which are sequentially connected, and an electrical appliance control part comprises a rectifier transformer connected with a power source, an output end of the rectifier transformer is connected with a rectification/feedback unit and a rectification unit in parallel, the rectification/feedback unit and the rectification unit are connected to a direct-current bus, 7 circuits are output from the direct-current bus, each circuit is provided with an inverter and an alternating-current variable-frequency motor, and then the alternating-current variable-frequency motor on each circuit is respectively connected with the uncoiler, the five-roller straightener, the left coiling machine, an upper roller of the main rolling mill, a lower roller of the main rolling mill, the right coiling machine and the coil stripping machine. Pollution of higher harmonic on a power grid is reduced by the transmission device, and the transmission device has low loss and a low cost.
Description
Technical field
The utility model belongs to metallurgical engineering equipment electric drive technology field, relates to a kind of four roller band mill dc bus formula AC frequency conversion transmission devices.
Background technology
The Electrified Transmission of milling train adopts the DC speed regulation technology usually, with regard to a singlestandmill, and five of minimum needs or more big-and-middle-sized direct current generator.With the AC frequency conversion gearratio, the shortcoming of DC Transmission has: 1, motor cost height, maintenance workload is big; 2, the Direct Current Governor System power factor is low, and higher hamonic wave is seriously polluted to electrical network, and is particularly more obvious during the big electric current of low speed, so must carry out harmonic wave control and power factor compensation; 3, the rectifier transformer of Xu Yaoing is many.
Summary of the invention
The purpose of this utility model provides a kind of four roller band mill dc bus formula AC frequency conversion transmission devices, has reduced the pollution of higher hamonic wave to electrical network, and loss is low, cost is low.
Technical solution adopted in the utility model is, four roller band mill dc bus formula AC frequency conversion transmission devices, comprise running part and electrical control part, running part comprises the uncoiler that connects successively, five-roll machine, left side coiling machine, main mill, right coiling machine and ejecting gear, main mill comprises main mill top roll and main mill lower roll, electrical control part comprises the rectifier transformer that links to each other with power supply, the output-parallel of rectifier transformer has rectification/feedback unit and rectification unit, rectification/feedback unit and rectification unit are connected to dc bus, 7 circuits of dc bus output, every circuit is provided with inverter and alternating-current variable frequency motor, then the alternating-current variable frequency motor on these 7 circuits more respectively with uncoiler, five-roll machine, left side coiling machine, the main mill top roll, the main mill lower roll, right coiling machine, ejecting gear connects.
Feature of the present utility model also is,
Differ 30 ° on rectification/feedback unit and the rectification unit phase place.
Four roller band mill dc bus formula AC frequency conversion transmission devices of the present utility model, adopt ac variable speed technology, dc bus formula AC frequency conversion vector control technology is applied on the four-high mill, only needs 1 rectifier transformer, the loss of transformer also can reduce greatly during operation.Rectification unit is designed to a cover rectification/feedback unit and a cover rectification unit parallel connection, because completely the retarding braking process time is short, braking power is little, so that the design power of feedback unit reduces half, significantly reduced the pollution of higher hamonic wave to electrical network, loss is low, cost is low.
Description of drawings
Fig. 1 is the structural representation of the utility model transmission device.
Among the figure, 1. uncoiler, 2. five-roll machine, 3. left coiling machine, 4. main mill top roll, 5. main mill lower roll, 6. right coiling machine, 7. ejecting gear, 8. rectifier transformer, 9. rectification/feedback unit, 10. rectification unit, 11. inverters, 12. alternating-current variable frequency motors.
The specific embodiment
Below in conjunction with accompanying drawing, be elaborated with regard to specific design scheme and embodiment.
The structure of the utility model four roller band mill dc bus formula AC frequency conversion transmission devices, as shown in Figure 1, comprise running part and electrical control part, running part comprises uncoiler 1, five-roll machine 2, left coiling machine 3, the main mill that connects successively, right coiling machine 6 and ejecting gear 7.Main mill comprises main mill top roll 4 and main mill lower roll 5.Electrical control part comprises the rectifier transformer 8 that links to each other with power supply, and the output-parallel of rectifier transformer 8 has rectification/feedback unit 9 and rectification unit 10, differs 30 ° on rectification/feedback unit 9 and rectification unit 10 phase places.Rectification/feedback unit 9 is connected to dc bus with rectification unit 10,7 circuits of dc bus output, every circuit is provided with inverter 11 and alternating-current variable frequency motor 12, then the alternating-current variable frequency motor 12 on every circuit more respectively with uncoiler 1, five-roll machine 2, left coiling machine 3, main mill top roll 4, main mill lower roll 5, right coiling machine 6, ejecting gear 7 connect.
The utility model four roller band mill dc bus formula AC frequency conversion transmission devices, alternating-current variable frequency motor 12 is adopted in milling train main transmission.When the transmission of similar milling train design in the past control, drag direct current generator at direct current speeder, take into account the coupling of line impedence, need 1 four winding rectifier transformer 250KVA(uncoiler of design, ejecting gear, straightener), 2 three winding rectifier transformer (the shared 800KVA of main mill top roll and lower roll, two shared 1000KVA of coiling machine), the transformer total capacity reaches 2050KVA.And adopt dc bus formula AC frequency conversion transmission system of the present utility model, and only needing 1 rectifier transformer 8, capacity is 1200KVA, and only this item saving is invested more than 100,000 yuan, and the loss of transformer also can reduce greatly during operation.
Another design main points of the present utility model are, rectification unit is designed to a cover rectification/feedback unit 9 and a cover rectification unit 10 parallel connections, because the retarding braking process time is short completely, braking power is little, so that the design power of feedback unit reduces half, rectification/feedback unit 9 and rectification unit 10 are connected into the 12 impulse commutation modes that differ 30 ° on phase place, this mode of connection theoretically 5,7,17,19 subharmonic are non-existent, significantly reduced the pollution of higher hamonic wave like this to electrical network, and the power factor of rectification/feedback unit 9 is more than 0.93, so the rectifier transformer high-pressure side does not need harmonic wave control unit and power factor compensation, reduces investment outlay more than 100,000 yuan.
The utility model four roller band mill dc bus formula AC frequency conversion transmission devices, when unit is operated in as-rolled condition, left side coiling machine 3 and main mill top roll 4, main mill lower roll 5, right coiling machine 6 are devoted oneself to work, uncoiler 1 and ejecting gear 7 quit work, in the operation of rolling, left side coiling machine 3 and right coiling machine 6 positive energy exchange on dc bus, if the tension force of left coiling machine 3 and right coiling machine 6 is more or less the same, main mill is depended in the basic load of unit.When unit is operated in the rewinding state, uncoiler 1 and left coiling machine 3 are devoted oneself to work, perhaps right coiling machine 6 and ejecting gear 7 are devoted oneself to work, perhaps uncoiler 1, left coiling machine 3, right coiling machine 6 and ejecting gear 7 are worked simultaneously, equipment inertia, frictional force, acceleration etc. are depended in the basic load of unit, and the energy that unit tension force is produced exchanges on dc bus.So the load of transformer, rectification unit will be little a lot.Every alternating-current variable frequency motor 12 is by 11 controls of an inverter, 7 inverters all are connected on the dc bus, the uncoiler 1 that is in the generator operation state like this is with electric energy feedback dc bus, carry out energy exchange with equipment such as left coiling machine 3, right coiling machines 6, thereby reduce the total current of transformer and rectification unit.
Claims (2)
1. a roller band mill dc bus formula AC frequency conversion transmission device is characterized in that, comprises running part and electrical control part,
Described running part comprises uncoiler (1), five-roll machine (2), left coiling machine (3), the main mill that connects successively, and right coiling machine (6) and ejecting gear (7), described main mill comprise main mill top roll (4) and main mill lower roll (5),
Described electrical control part comprises the rectifier transformer (8) that links to each other with power supply, the output-parallel of rectifier transformer (8) has rectification/feedback unit (9) and rectification unit (10), described rectification/feedback unit (9) is connected to dc bus with rectification unit (10), 7 circuits of dc bus output, every circuit is provided with inverter (11) and alternating-current variable frequency motor (12), then the alternating-current variable frequency motor (12) on these 7 circuits more respectively with uncoiler (1), five-roll machine (2), left side coiling machine (3), main mill top roll (4), main mill lower roll (5), right coiling machine (6), ejecting gear (7) connects.
2. four roller band mill dc bus formula AC frequency conversion transmission devices according to claim 1 is characterized in that, differ 30 ° on described rectification/feedback unit (9) and rectification unit (10) phase place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206611858U CN201900135U (en) | 2010-12-15 | 2010-12-15 | Direct-current bus type alternating-current variable-frequency transmission device of four-roller plate strip mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206611858U CN201900135U (en) | 2010-12-15 | 2010-12-15 | Direct-current bus type alternating-current variable-frequency transmission device of four-roller plate strip mill |
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| Publication Number | Publication Date |
|---|---|
| CN201900135U true CN201900135U (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206611858U Expired - Lifetime CN201900135U (en) | 2010-12-15 | 2010-12-15 | Direct-current bus type alternating-current variable-frequency transmission device of four-roller plate strip mill |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316964A (en) * | 2013-06-26 | 2013-09-25 | 江苏亨特宏业重工有限公司 | Stretch bending straightening unit control system of aluminum tape processing equipment |
| CN104384463A (en) * | 2014-10-31 | 2015-03-04 | 镇江市宏业科技有限公司 | Control system for cast-rolling mill group of aluminum strip processing equipment |
| CN104407562A (en) * | 2014-12-04 | 2015-03-11 | 镇江市宏业科技有限公司 | Alternating current multi-transmission system for color coating production line of aluminum plate |
| CN105880315A (en) * | 2016-06-14 | 2016-08-24 | 佛山市荣星数控设备制造有限公司 | Circuit structure for withdrawal and straightening machine |
| CN107363103A (en) * | 2017-07-10 | 2017-11-21 | 太原重工股份有限公司 | The control method and control system of mandrel movement limiting |
| CN107470367A (en) * | 2017-10-17 | 2017-12-15 | 宁波中瑞新材料有限公司 | A kind of energy-saving type sheet metal strip milling train and milling method |
-
2010
- 2010-12-15 CN CN2010206611858U patent/CN201900135U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316964A (en) * | 2013-06-26 | 2013-09-25 | 江苏亨特宏业重工有限公司 | Stretch bending straightening unit control system of aluminum tape processing equipment |
| CN104384463A (en) * | 2014-10-31 | 2015-03-04 | 镇江市宏业科技有限公司 | Control system for cast-rolling mill group of aluminum strip processing equipment |
| CN104407562A (en) * | 2014-12-04 | 2015-03-11 | 镇江市宏业科技有限公司 | Alternating current multi-transmission system for color coating production line of aluminum plate |
| CN105880315A (en) * | 2016-06-14 | 2016-08-24 | 佛山市荣星数控设备制造有限公司 | Circuit structure for withdrawal and straightening machine |
| CN107363103A (en) * | 2017-07-10 | 2017-11-21 | 太原重工股份有限公司 | The control method and control system of mandrel movement limiting |
| CN107363103B (en) * | 2017-07-10 | 2019-08-02 | 太原重工股份有限公司 | The control method and control system of mandrel movement limiting |
| CN107470367A (en) * | 2017-10-17 | 2017-12-15 | 宁波中瑞新材料有限公司 | A kind of energy-saving type sheet metal strip milling train and milling method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110720 |