CN113921169A - Cable of normal-conducting high-speed magnetic suspension long stator ground coil - Google Patents
Cable of normal-conducting high-speed magnetic suspension long stator ground coil Download PDFInfo
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- CN113921169A CN113921169A CN202111263603.7A CN202111263603A CN113921169A CN 113921169 A CN113921169 A CN 113921169A CN 202111263603 A CN202111263603 A CN 202111263603A CN 113921169 A CN113921169 A CN 113921169A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
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Abstract
The invention discloses a cable of a ground coil of a normally-conducting high-speed magnetic suspension long stator, which is characterized in that: the cable comprises a conductor core, a conductor shielding layer, an insulating shielding layer and a sheath which are arranged from inside to outside in sequence; the surface of the sheath is coated with a coating. The conductor core is an aluminum core; the base materials of the conductor shielding layer, the insulating layer and the insulating shielding layer are all ethylene propylene rubber; the base material of the sheath is chloroprene rubber. The invention specially designs and develops the cable suitable for the normally-conducting high-speed magnetic suspension ground long stator coil, sets up related technical standards and technical requirements, and fills the blank of related fields in China. The cable can meet the frequency change from 0-400 Hz in operation, can bear the voltage change of 10-20 kV, and meets the working requirement of a long stator coil on the high-speed magnetic suspension ground. The cable is made of non-toxic and harmless raw materials, is convenient to produce and process and cannot cause environmental pollution.
Description
Technical Field
The invention belongs to the field of normal-conduction high-speed magnetic suspension design and engineering application, and particularly relates to a cable of a normal-conduction high-speed magnetic suspension long stator ground coil.
Background
Along with the scientific and technological progress and the rapid development of the traffic industry, the high-speed magnetic levitation technology gradually realizes the transition from theory to practice, and the countries in the world which carry out research on the magnetic levitation technology are mainly Germany, Japan, Britain, Canada, America and China. The us abandoned the research program in the last 70 th century. Magnetic levitation trains were studied in the united kingdom since 1973, but the first commercial operating line amounting to 600m from bermingham airport to train station was shut down in 1995, and the countries most well studied for magnetic levitation technology are germany and japan at present.
China began to research low-speed normal-conducting magnetic suspension trains in the early 80 s of the last century and gradually gained promising results. In 2016, a long-sand magnetic levitation express line train with the speed of 100 kilometers per hour, which is developed by the medium train company. In 2018, 6 months, the first commercial magnetic levitation 2.0 train in China is off-line from Zhongzhui electric locomotive Co. And in 2019, 5, 23 and 5 months, the high-speed magnetic suspension test sample car with the speed of 600 kilometers per hour is off line in the Qingdao. This marks a major breakthrough in China in the field of high-speed magnetic levitation technology.
The basic electrical principle of the magnetic suspension train is a linear motor which consists of a ground long stator coil and a vehicle-mounted rotor coil, wherein the ground long stator coil needs to provide a suspension magnetic field and a guiding magnetic field to complete electromagnetic suspension and power driving of the train. The ground coil can provide a stable and reliable magnetic field, and has extremely high technical requirements on the cable formed by the ground coil.
Therefore, it is imperative to study a ground-long stator coil cable that can satisfy the performance of high-speed magnetic levitation technology.
The key defects in the prior art and key technical difficulties to be solved by the invention are as follows:
1. the common large-current cable in the market generally has working conditions of stable voltage and frequency transmission, and the cable required by the high-speed magnetic suspension ground coil can meet the frequency change from 0-400 Hz and simultaneously needs to bear the voltage change from 10-20 kV, so that the traditional cable is required to be innovatively adjusted in the aspects of cable structures, cable current-carrying materials, cable protection and shielding and the like.
2. For a high-speed magnetic suspension system, suspension and guidance of the whole vehicle body completely depend on electromagnetic force, the requirement on stability of a magnetic field is high, and a ground coil cable is used as a coil for generating the magnetic field and needs to ensure continuous and stable magnetic field supply under various working conditions.
3. In the actual operation of high-speed magnetic levitation, different environmental conditions and special conditions need to be considered, and different construction conditions are faced in the construction and laying process, so that the ground coil cable needs to have better structural strength and easy-to-lay structural performance.
Disclosure of Invention
In view of at least one of the above-mentioned deficiencies or needs for improvement in the prior art, the present invention provides a cable for a ground coil of a normally conductive high-speed magnetic levitation long stator.
According to the technical scheme, the technical requirements required by the cable are summarized through the investigation and analysis of the application conditions of the normally-conductive high-speed magnetic suspension long stator, wherein the technical requirements comprise the size, the conductivity and the insulation performance of a conductor cable core, the basic electrical performance of a shielding layer, the mechanical performance of a semi-conductive rubber sheath and the mechanical and electrical performance of a semi-conductive coating.
The working frequency and the working voltage variation range of the ground coil cable are determined through corresponding simulation and experimental analysis, and corresponding performance requirements are provided.
The technical scheme sets a final technical scheme of the cable by locking a final target 'a ground coil cable meeting the high-speed magnetic suspension performance requirement of 600 km/h', and comprises a conductor core, a conductor shielding layer, an insulating shielding layer, a sheath and a coating which are sequentially arranged from inside to outside.
The related material analysis shows that the aluminum core has greater technical advantages than the copper core in the selection of the cable current-carrying core, and the technical performance can be better realized by adopting the scheme of the aluminum core cable, so that the cable current-carrying inner core is a synthetic aluminum conductor.
The conductor shielding layer is arranged between the conductive core and the insulating layer, the insulating shielding layer is arranged between the insulating layer and the mechanical sheath, and both the conductor shielding layer and the insulating shielding layer play a role in electric blocking, and through simulation, the volume resistivity of the conductor shielding is less than or equal to 1000 omega-m, and the volume resistivity of the insulating shielding is less than or equal to 500 omega-m, so that the mixture taking ethylene propylene rubber as a base material is selected.
The cable has large current-carrying capacity and high magnetic field intensity, the insulating layer adopts a mixture which takes ethylene propylene rubber with the nominal thickness of 5.5mm as a base material, the thinnest point of the insulating layer is not less than 4.9mm, and the roundness of the insulating wire core is not more than 1.0 mm.
The semiconductor rubber sheath is an outer layer armor of the cable and is used for preventing water, separating oil and resisting abrasion and increasing the mechanical strength of the cable, so that the thickness, the strength and the bending performance of the cable need to be subjected to strict simulation and calculation. Meanwhile, in consideration of the laying position and working conditions of the cable in practical application, the cable needs to have the performances of ozone resistance, ultraviolet resistance, air heat aging resistance and the like.
The laying of the ground coil of the normally-conductive high-speed magnetic suspension long stator needs to accurately coil the cable, the construction precision requirement is high, the construction difficulty is high, the semi-conductive coating is added on the outer layer of the ground coil to facilitate the laying of the cable, the performances of protection, lubrication and wear resistance are achieved, and the cable laying process is not abraded or blocked.
The above-described preferred features may be combined with each other as long as they do not conflict with each other.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
1) the cable suitable for the normally-conducting high-speed magnetic suspension ground long stator coil is designed and researched, relevant technical standards and technical requirements are respectively formulated for a current-carrying core, a conductor shielding layer, an insulating shielding layer, a sheath and a coating of the cable, and the blank of relevant fields in China is filled.
2) The cable suitable for the long stator coil on the normally-conductive high-speed magnetic suspension ground can meet the frequency change from 0-400 Hz in operation, can bear the voltage change of 10-20 kV at the same time, and meets the working requirement of the long stator coil on the normally-conductive high-speed magnetic suspension ground.
3) The cable suitable for the normally-conducting high-speed magnetic suspension ground long stator coil is made of non-toxic and harmless raw materials, is convenient to produce and process and cannot cause environmental pollution.
Drawings
Fig. 1 is a schematic diagram of a cable of a ground coil of a normally-conducting high-speed magnetic suspension long stator according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to specific embodiments.
As a preferred embodiment of the present invention, aiming at the technical requirements of the normal-conduction high-speed magnetic suspension ground coil cable, combining the material performance and the practical application, as shown in fig. 1, the present invention provides a cable of a normal-conduction high-speed magnetic suspension long stator ground coil, which comprises a conductor core 1, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4 and a sheath 5, which are sequentially attached from inside to outside; the surface of the sheath 5 is coated with a coating 6. The conductor core 1 is an aluminum core; the base materials of the conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are all ethylene propylene rubber; the base material of the sheath 5 is neoprene.
Meanwhile, the mechanical property and the electrical characteristic of the cable are researched, and the combination of proper material properties and the like is provided.
Conductor core 1:
the conductor is a soft aluminum round wire formed by twisting, pressing and annealing 37(1+6+12+ 18) monofilaments in sequence from inside to outside. Nominal cross-section of the conductor: 300mm2The outer diameter of the conductor is less than or equal to 20.5mm, and the direct current resistance of the conductor is less than or equal to 0.100 omega/km.
Conductor shield layer 2:
the conductor shielding layer is arranged between the conductive core and the insulating layer to play a role of electric blocking, and the volume resistivity of the conductor shielding layer is less than or equal to 1000 omega.m through simulation, so that the mixture taking ethylene propylene rubber as a base material is selected.
Insulating layer 3:
the insulation should be a mixture based on ethylene propylene rubber. The nominal thickness of the insulation is 5.5mm, the average thickness of the insulation is not less than the nominal value, the thinnest point is not less than 4.9mm, the roundness of the insulation wire core is not more than 1.0mm, and the insulation performance meets the specification of the Q/320405CTR018-2019 standard.
Insulating and shielding layer 4:
the insulation shielding layer is arranged between the insulation layer and the mechanical sheath and plays a role in electric blocking, and the volume resistivity of the insulation shielding layer is less than or equal to 500 omega.m through simulation, so that a mixture taking ethylene propylene rubber as a base material is selected.
Sheath 5:
the jacket should be a neoprene based blend. The insulation nominal thickness of the sheath is 2.1mm, the average thickness of the insulation is not less than the nominal value, the thinnest point is not less than 1.7mm, and the performance of the sheath is in accordance with the specification of the Q/320405CTR018-2019 standard.
Coating 6:
the coating is a fluorocarbon-based coating which is uniformly and tightly adhered to the surface of the sheath after coating and curing, and the undesirable phenomena of cracking, peeling and the like can not occur even if the sheath deforms, wherein the nominal thickness of the coating is not less than 15.0 mu m, the minimum value is not less than 5.0 mu m, and the maximum value is not more than 50 mu m.
And (3) cable production:
the average value of the outer diameter of the finished cable is 38.8 +/-0.2 mm, the single value is 38.8 +/-0.3 mm, the average value of the ovality of the finished cable is not more than 1.0mm, and the single maximum value is not more than 1.5 mm. The electrical performance and the non-electrical performance of the finished cable meet the requirements of the Q/320405CTR018-2019 standard.
In summary, compared with the prior art, the scheme of the invention has the following significant advantages:
1) the cable suitable for the normally-conducting high-speed magnetic suspension ground long stator coil is designed and researched, relevant technical standards and technical requirements are respectively formulated for a current-carrying core, a conductor shielding layer, an insulating shielding layer, a sheath and a coating of the cable, and the blank of relevant fields in China is filled.
2) The cable suitable for the long stator coil on the normally-conductive high-speed magnetic suspension ground can meet the frequency change from 0-400 Hz in operation, can bear the voltage change of 10-20 kV at the same time, and meets the working requirement of the long stator coil on the normally-conductive high-speed magnetic suspension ground.
3) The cable suitable for the normally-conducting high-speed magnetic suspension ground long stator coil is made of non-toxic and harmless raw materials, is convenient to produce and process and cannot cause environmental pollution.
It will be appreciated that the embodiments of the system described above are merely illustrative, in that elements illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over different network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the embodiment. One of ordinary skill in the art can understand and implement such a technique without inventive effort.
In addition, it should be understood by those skilled in the art that in the specification of the embodiments of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the description of the embodiments of the invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.
However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed embodiments of the invention require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of an embodiment of this invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a cable of long stator ground coil of high-speed magnetic suspension of normal conductance which characterized in that: the cable comprises a conductor core (1), a conductor shielding layer (2), an insulating layer (3), an insulating shielding layer (4) and a sheath (5) which are arranged from inside to outside in sequence;
the conductor core (1) is an aluminum core;
the base materials of the conductor shielding layer (2), the insulating layer (3) and the insulating shielding layer (4) are all ethylene propylene rubber;
the base material of the sheath (5) is chloroprene rubber.
2. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator of claim 1, wherein:
the surface of the sheath (5) is coated with a coating (6); the coating (6) is a fluorocarbon-based coating.
3. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator of claim 1, wherein:
the conductor core (1) of the aluminum core is a soft aluminum round wire formed by stranding, compacting and annealing a plurality of monofilaments.
4. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator as claimed in claim 3, wherein:
the outer diameter of the conductor core (1) of the aluminum core is less than or equal to 20.5mm, and the direct current resistance of the conductor is less than or equal to 0.100 omega/km.
5. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator of claim 1, wherein:
the volume resistivity of the conductor shield layer (2) is less than or equal to 1000 omega-m.
6. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator of claim 1, wherein:
the thinnest point of the insulating layer (3) is not less than 4.9mm, and the roundness of the insulating wire core is not more than 1.0 mm.
7. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator of claim 1, wherein:
the volume resistivity of the insulation shield layer (4) is less than or equal to 500 omega-m.
8. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator of claim 1, wherein:
the thickness of the thinnest point of the sheath (5) is not less than 1.7 mm.
9. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator as claimed in claim 2, wherein:
the nominal thickness of the coating (6) is not less than 15.0 [ mu ] m, the minimum value is not less than 5.0 [ mu ] m and the maximum value is not more than 50 [ mu ] m.
10. The cable of the ground coil of the normally-conducting high-speed magnetic levitation long stator of claim 1, wherein:
the average value of the outer diameters of the finished products of the cables is 38.8 +/-0.2 mm, and the single value is 38.8 +/-0.3 mm; the ovality average value of the finished cable is not more than 1.0mm, and the single maximum value is not more than 1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111263603.7A CN113921169A (en) | 2021-10-28 | 2021-10-28 | Cable of normal-conducting high-speed magnetic suspension long stator ground coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111263603.7A CN113921169A (en) | 2021-10-28 | 2021-10-28 | Cable of normal-conducting high-speed magnetic suspension long stator ground coil |
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| Publication Number | Publication Date |
|---|---|
| CN113921169A true CN113921169A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111263603.7A Pending CN113921169A (en) | 2021-10-28 | 2021-10-28 | Cable of normal-conducting high-speed magnetic suspension long stator ground coil |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1652261A (en) * | 2005-01-26 | 2005-08-10 | 上海电缆研究所 | Medium voltage winding cable for electric generator, motor and transformer |
| CN200976290Y (en) * | 2006-09-22 | 2007-11-14 | 上海亚龙工业（集团）有限公司 | Cable for magnetic levitation |
| CN110459353A (en) * | 2019-09-11 | 2019-11-15 | 金杯电工股份有限公司 | The dedicated long stator cable of magnetic suspension |
| CN110491556A (en) * | 2019-09-11 | 2019-11-22 | 金杯电工股份有限公司 | A kind of magnetic-levitation traffic long stator winding cable |
| CN110570992A (en) * | 2019-09-11 | 2019-12-13 | 金杯电工股份有限公司 | production process of magnetic suspension track traffic long stator cable |
-
2021
- 2021-10-28 CN CN202111263603.7A patent/CN113921169A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1652261A (en) * | 2005-01-26 | 2005-08-10 | 上海电缆研究所 | Medium voltage winding cable for electric generator, motor and transformer |
| CN200976290Y (en) * | 2006-09-22 | 2007-11-14 | 上海亚龙工业（集团）有限公司 | Cable for magnetic levitation |
| CN110459353A (en) * | 2019-09-11 | 2019-11-15 | 金杯电工股份有限公司 | The dedicated long stator cable of magnetic suspension |
| CN110491556A (en) * | 2019-09-11 | 2019-11-22 | 金杯电工股份有限公司 | A kind of magnetic-levitation traffic long stator winding cable |
| CN110570992A (en) * | 2019-09-11 | 2019-12-13 | 金杯电工股份有限公司 | production process of magnetic suspension track traffic long stator cable |
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