Hybrid power locomotive electrical cable and wiring method thereof

Abstract

The invention provides an electrical cable of a hybrid power locomotive and a wiring method of the electrical cable. The electrical cable comprises a high-voltage cable and a low-voltage cable. The high-voltage cable comprises a conductor core I, and an insulating layer I, a shielding layer I and a sheath layer I which are sequentially connected to the outer side of the conductor core I in a sleeving manner; the low-voltage cable comprises a conductor core II, and an insulating layer II, a shielding layer I and a sheath layer I which are sequentially connected to the outer side of the conductor core II in a sleeving manner; the wiring method comprises the steps that during layered arrangement, the high-voltage cables are located on the upper layer, the low-voltage cables are located on the lower layer, and it is guaranteed that the vertical distance between the high-voltage cables on the upper layer and the low-voltage cables on the lower layer is at least 200 mm; when the high-voltage cable and the low-voltage cable are arranged in parallel, the horizontal distance between the high-voltage cable and the low-voltage cable which are parallel and adjacent to each other is at least The layers of the electrical cable are made of different materials, the electrical cable has good conductivity and mechanical strength and can meet the insulation requirement, and the wiring method can reduce the damage fault risk of the cable, reduce electromagnetic interference and enhance electromagnetic compatibility.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid locomotives, and in particular to an electrical cable for a hybrid locomotive and a wiring method thereof. Background Art

[0002] With the improvement of environmental awareness and the transformation of energy structure, hybrid locomotives, as an important part of new energy vehicles, are increasingly widely used in the field of transportation. Hybrid locomotives combine the advantages of traditional internal combustion engines and electric drive systems, which can not only effectively reduce fuel consumption and emission pollution, but also improve the vehicle's power performance and driving comfort. Therefore, the complexity of the electrical system of hybrid locomotives has increased significantly, and higher requirements have been placed on electrical cables and their wiring methods.

[0003] In the electrical system of hybrid locomotives, electrical cables are the key carriers of energy transmission and information exchange. They are not only responsible for connecting core components such as batteries, motors, and controllers to form a complete electrical circuit, but also undertake multiple functions such as signal transmission, electromagnetic shielding, and insulation protection. Therefore, the performance and wiring quality of electrical cables directly affect the safety, reliability, and energy efficiency level of hybrid locomotives. At present, the electrical cables of hybrid locomotives have the following main disadvantages:

[0004] (1) Traditional wiring methods for electrical cables often lack unified planning and standards, resulting in chaotic cable routing, unclear layers, and serious cross-interference. This not only increases the difficulty of installation and maintenance, but also easily causes electrical failures and safety hazards. In particular, in the layout of high-voltage cables and low-voltage cables, traditional methods often ignore electromagnetic compatibility considerations, resulting in prominent interference problems between the two.

[0005] (2) Traditional electrical cables often use a single conductor material and insulation material, which makes it difficult to meet the high performance requirements of hybrid locomotives such as high temperature resistance and aging resistance. Especially in high-voltage environments, the electrical and mechanical properties of traditional materials are prone to degradation, resulting in an increased cable failure rate. Summary of the invention

[0006] In view of the technical problems existing in the existing hybrid locomotive electrical cables and wiring methods, the present invention provides a hybrid locomotive electrical cable and a wiring method thereof.

[0007] The technical means adopted by the present invention are as follows:

[0008] A hybrid locomotive electrical cable, comprising a high voltage cable and a low voltage cable;

[0009] The high-voltage cable comprises a conductor core 1, and an insulation layer 1, a shielding layer 1 and a sheath layer 1 which are sequentially sleeved on the outer side of the conductor core 1;

[0010] The low-voltage cable comprises a conductor core 2, and an insulating layer 2, a shielding layer 1 and a sheath layer 1 which are sequentially sleeved on the outside of the conductor core 2.

[0011] Furthermore, the material of the conductor core 1 is copper or aluminum, and the material of the insulation layer 1 is cross-linked polyethylene or ethylene propylene rubber.

[0012] Furthermore, the material of the conductor core 2 is copper or aluminum, the cross-sectional area of ​​the conductor core 2 is smaller than the cross-sectional area of ​​the conductor core 1, and the material of the insulation layer 2 is polyvinyl chloride or polyethylene.

[0013] Furthermore, the shielding layer 1 and the shielding layer 2 are made of metal foil or braided copper wire; the material of the sheath layer 1 and the protective sheath layer 2 is polyvinyl chloride or polyethylene.

[0014] The present invention also provides a wiring method for hybrid locomotive electrical cables, comprising: wiring high-voltage cables and low-voltage cables according to a planned wiring path, wherein during the wiring process, the wiring methods adopted include layered arrangement and parallel arrangement;

[0015] When arranging high-voltage cables and low-voltage cables in layers, the high-voltage cables should be located on the upper layer and the low-voltage cables on the lower layer, and the vertical distance between the high-voltage cables on the upper layer and the low-voltage cables on the lower layer should be at least 200 mm;

[0016] When high-voltage cables and low-voltage cables are arranged in parallel, the horizontal distance between parallel and adjacent high-voltage cables and low-voltage cables shall be at least 100 mm.

[0017] Furthermore, the wiring method of the hybrid locomotive electrical cable specifically comprises the following steps:

[0018] S1. Plan the wiring paths of high-voltage cables and low-voltage cables according to the electrical system layout of the hybrid locomotive, and ensure that the wiring paths can reasonably plan the directions of high-voltage cables and low-voltage cables so that the high-voltage cables and low-voltage cables avoid the area where the diesel engine is located;

[0019] S2. Lay out high-voltage cables and low-voltage cables according to the planned wiring paths;

[0020] S3. Cable fixing and protection: During the wiring process, use binding tape to fix the high-voltage cables and low-voltage cables on the cable tray, and use rubber sleeves or corrugated tubes to protect the high-voltage cables and low-voltage cables when they pass through holes on the vehicle body, come into contact with other components, or need to change direction;

[0021] S4. Cable connection and testing: After wiring is completed, check the joints of the high-voltage and low-voltage cables to ensure reliable connections, and then conduct electrical performance tests and electromagnetic compatibility tests to verify the functionality and safety of the high-voltage and low-voltage cables.

[0022] Furthermore, the high-voltage cable is subjected to fireproofing treatment, which refers to coating the outer surface of the high-voltage cable with a fireproof coating, wherein the fireproof coating comprises a tert-acrylic emulsion water-based material, a fire retardant and a plasticizer.

[0023] Furthermore, during the wiring process, ensure that the horizontal distance between the high-voltage cable and the fuel pipeline and the brake oil pipe is greater than 100 mm, and install a fireproof isolation plate between the high-voltage cable and the fuel pipeline and the brake oil pipe.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The hybrid locomotive electrical cable provided by the present invention has a high-voltage cable that uses copper or aluminum as the conductor core one, ensuring good conductivity and mechanical strength. The insulation layer one uses cross-linked polyethylene or ethylene propylene rubber. These materials not only have excellent insulation properties, but also can maintain stability in high temperature and high humidity environments, thereby extending the service life of the cable. The low-voltage cable also uses copper or aluminum as the conductor core two, but the cross-sectional area is smaller than that of the high-voltage cable to match its lower current transmission requirements. The insulation layer two uses polyvinyl chloride or polyethylene. These materials are relatively low in cost and meet the insulation requirements under low-voltage environments.

[0026] 2. The wiring method for hybrid locomotive electrical cables provided by the present invention avoids the cable path passing through the high temperature, vibration, easy collision and electromagnetic interference sensitive areas where the diesel engine is located by reasonably planning the wiring path, reducing the risk of cable damage and failure. The layered arrangement of cables ensures the vertical distance between the high-voltage cables and the low-voltage cables, reducing the possibility of electromagnetic interference. The horizontal distance is strictly controlled when arranged in parallel, further enhancing electromagnetic compatibility.

[0027] 3. The hybrid locomotive electrical cable and wiring method provided by the present invention perform fireproofing treatment on the high-voltage cable, such as coating it with fire-retardant paint, which significantly improves the fireproof performance of the cable and reduces the risk of fire.

[0028] Based on the above reasons, the present invention can be widely promoted in the field of hybrid locomotive electrical cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 The figure is a schematic flow chart of the method for wiring electrical cables for a hybrid locomotive according to the present invention. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0038] Example 1

[0039] The present invention provides a hybrid locomotive electrical cable, including a high-voltage cable and a low-voltage cable;

[0040] The high-voltage cable comprises a conductor core 1, and an insulation layer 1, a shielding layer 1 and a sheath layer 1 which are sequentially sleeved on the outer side of the conductor core 1;

[0041] The low-voltage cable comprises a conductor core 2, and an insulating layer 2, a shielding layer 1 and a sheath layer 1 which are sequentially sleeved on the outside of the conductor core 2.

[0042] Furthermore, the material of the conductor core 1 is copper or aluminum, and the material of the insulation layer 1 is cross-linked polyethylene or ethylene propylene rubber.

[0043] Furthermore, the material of the conductor core 2 is copper or aluminum, the cross-sectional area of ​​the conductor core 2 is smaller than the cross-sectional area of ​​the conductor core 1, and the material of the insulation layer 2 is polyvinyl chloride or polyethylene.

[0044] Furthermore, the shielding layer one and the shielding layer two are metal foil or braided copper wire; when the shielding layer one and the shielding layer two are braided copper wire, the braiding method is twisted pair braiding; when the shielding layer one and the shielding layer two are metal foil, the metal foil is directly wrapped around the insulating layer one and the insulating layer two; the material of the sheath layer one and the protective sheath layer two is polyvinyl chloride or polyethylene.

[0045] Preferably, in the hybrid locomotive electrical cable provided by this embodiment:

[0046] The conductor core 1 is made of copper and has a cross-sectional area of ​​25 mm 2 The conductor core 2 is also made of copper, but has a smaller cross-sectional area of ​​4 mm. 2 ;

[0047] The material of the insulating layer 1 is cross-linked polyethylene (XLPE) with a thickness of 2.5 mm; the shielding layer 1 is braided copper wire with a braiding density of more than 85%; the material of the sheath layer 1 is polyvinyl chloride (PVC) with a thickness of 3.0 mm;

[0048] The second insulating layer uses polyvinyl chloride (PVC) with a thickness of 1.5 mm; the second shielding layer uses braided copper wire woven with metal foil or twisted pair to reduce electromagnetic interference; the second sheath layer is made of polyvinyl chloride (PVC) with a thickness of 2.0 mm.

[0049] The hybrid locomotive electrical cable provided by the present invention has a high-voltage cable that uses copper or aluminum as a conductor core one, ensuring good conductivity and mechanical strength. The insulation layer one uses cross-linked polyethylene or ethylene propylene rubber. These materials not only have excellent insulation properties, but can also maintain stability in high temperature and high humidity environments, thereby extending the service life of the cable. The low-voltage cable also uses copper or aluminum as a conductor core two, but has a smaller cross-sectional area than the high-voltage cable to match its lower current transmission requirements. The insulation layer two uses polyvinyl chloride or polyethylene. These materials are relatively low in cost and meet the insulation requirements under low-voltage environments.

[0050] The present invention also provides a wiring method for hybrid locomotive electrical cables, comprising: wiring high-voltage cables and low-voltage cables according to a planned wiring path, wherein during the wiring process, the wiring methods adopted include layered arrangement and parallel arrangement;

[0051] When arranging high-voltage cables and low-voltage cables in layers, the high-voltage cables should be located on the upper layer and the low-voltage cables on the lower layer, and the vertical distance between the high-voltage cables on the upper layer and the low-voltage cables on the lower layer should be at least 200 mm to reduce electromagnetic interference;

[0052] When high-voltage cables and low-voltage cables are arranged in parallel, the horizontal distance between parallel and adjacent high-voltage cables and low-voltage cables shall be at least 100 mm to prevent the electromagnetic field of the high-voltage cables from interfering with the low-voltage cables.

[0053] Furthermore, if Figure 1 As shown, the wiring method of the hybrid locomotive electrical cable specifically includes the following steps:

[0054] S1. Plan the wiring paths of high-voltage cables and low-voltage cables according to the electrical system layout of the hybrid locomotive, and ensure that the wiring paths can reasonably plan the directions of high-voltage cables and low-voltage cables so that the high-voltage cables and low-voltage cables avoid the area where the diesel engine is located;

[0055] S2. Lay out high-voltage cables and low-voltage cables according to the planned wiring paths;

[0056] S3. Cable fixing and protection: During the wiring process, use binding tape to fix the high-voltage cables and low-voltage cables on the cable tray. When the high-voltage cables and low-voltage cables pass through holes on the vehicle body, come into contact with other components, or need to change direction, use rubber sleeves or corrugated tubes to protect the high-voltage cables and low-voltage cables, so as to ensure that the high-voltage cables and low-voltage cables are installed firmly and can avoid mechanical damage.

[0057] S4. Cable connection and testing: After wiring is completed, check the joints of high-voltage cables and low-voltage cables to ensure reliable connections. Then conduct electrical performance tests and electromagnetic compatibility tests (such as insulation resistance tests and withstand voltage tests) to verify the functionality and safety of high-voltage cables and low-voltage cables. For high-voltage systems, leakage current detection is also required to ensure safety.

[0058] The wiring method for hybrid locomotive electrical cables provided by the present invention avoids the cable path passing through high temperature, vibration, easy collision and electromagnetic interference sensitive areas by reasonably planning the wiring path, thereby reducing the risk of cable damage and failure. The layered arrangement of cables ensures the vertical distance between high-voltage cables and low-voltage cables, reducing the possibility of electromagnetic interference. The horizontal distance is strictly controlled when arranged in parallel, further enhancing electromagnetic compatibility.

[0059] Furthermore, the high-voltage cables are subjected to fireproofing treatment, which refers to coating the outer surface of the high-voltage cables with fireproof coating, the composition of which includes tert-acrylic emulsion water-based material, fire retardant and plasticizer.

[0060] Preferably, the thickness of the applied fire retardant coating is 0.5 mm, and the fire retardant coating is prepared from a tert-acrylic emulsion water-based material, a fire retardant and an appropriate amount of plasticizer.

[0061] Furthermore, during the wiring process, ensure that the horizontal distance between the high-voltage cable and inflammable and explosive components such as the fuel pipeline and the brake oil pipe is greater than 100 mm, and install a fireproof isolation plate between the high-voltage cable and the fuel pipeline and the brake oil pipe.

[0062] In a hybrid locomotive, the high-voltage cable starts from the battery pack and is connected to the motor through the inverter, while the low-voltage cable is mainly responsible for controlling signal transmission and power supply for auxiliary equipment. During the wiring process, the high-voltage cable is placed on the upper layer and the low-voltage cable is placed on the lower layer to ensure that the vertical distance between the two is at least 200 mm, which can effectively reduce the impact of the electromagnetic field on the low-voltage circuit. When the high-voltage cable and the low-voltage cable need to be arranged in parallel, the horizontal spacing is guaranteed to be no less than 100 mm, which can further prevent electromagnetic interference problems.

[0063] The wiring method of hybrid locomotive electrical cables provided by the present invention performs fireproofing treatment on high-voltage cables, such as coating them with fireproof paint, which significantly improves the fireproofing performance of the cables and reduces the risk of fire.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid locomotive electrical cable, characterized in that: Including high voltage cables and low voltage cables; The high-voltage cable comprises a conductor core 1 and an insulating layer 1, a shielding layer 1 and a sheath layer 1 which are sequentially sleeved on the outside of the conductor core 1; the conductor core 1 is made of copper or aluminum, and the insulating layer 1 is made of cross-linked polyethylene or ethylene-propylene rubber; The low-voltage cable comprises a conductor core 2 and an insulating layer 2, a shielding layer 1 and a sheath layer 1 which are sequentially sleeved on the outside of the conductor core 2; the conductor core 2 is made of copper or aluminum, and the insulating layer 2 is made of polyvinyl chloride or polyethylene; The shielding layer 1 and the shielding layer 2 are made of metal foil or braided copper wire; the material of the sheath layer 1 and the protective sheath layer 2 is polyvinyl chloride or polyethylene.

2. The hybrid locomotive electrical cable according to claim 1, characterized in that: The cross-sectional area of ​​the second conductor core is smaller than the cross-sectional area of ​​the first conductor core.

3. A method for wiring electrical cables of a hybrid locomotive, characterized in that: The hybrid locomotive electrical cable according to any one of claims 1 to 2 is adopted, comprising: wiring high-voltage cables and low-voltage cables according to a planned wiring path, and during the wiring process, the wiring methods adopted include layered arrangement and parallel arrangement; When arranging high-voltage cables and low-voltage cables in layers, the high-voltage cables should be located on the upper layer and the low-voltage cables on the lower layer, and the vertical distance between the high-voltage cables on the upper layer and the low-voltage cables on the lower layer should be at least 200 mm; When high-voltage cables and low-voltage cables are arranged in parallel, the horizontal distance between parallel and adjacent high-voltage cables and low-voltage cables shall be at least 100 mm.

4. The method for wiring hybrid vehicle electrical cables according to claim 3, characterized in that: The wiring method of the hybrid locomotive electrical cable specifically comprises the following steps: S1. Plan the wiring paths of high-voltage cables and low-voltage cables according to the electrical system layout of the hybrid locomotive, and ensure that the wiring paths can reasonably plan the directions of high-voltage cables and low-voltage cables so that the high-voltage cables and low-voltage cables avoid the area where the diesel engine is located; S2. Lay out high-voltage cables and low-voltage cables according to the planned wiring paths; S3. Cable fixing and protection: During the wiring process, use binding tape to fix the high-voltage cables and low-voltage cables on the cable tray, and use rubber sleeves or corrugated tubes to protect the high-voltage cables and low-voltage cables when they pass through holes on the vehicle body, come into contact with other components, or need to change direction; S4. Cable connection and testing: After wiring is completed, check the joints of the high-voltage and low-voltage cables to ensure reliable connections, and then conduct electrical performance tests and electromagnetic compatibility tests to verify the functionality and safety of the high-voltage and low-voltage cables.

5. The method for wiring hybrid locomotive electrical cables according to claim 3, characterized in that: Fireproofing of high-voltage cables refers to coating the outer surface of high-voltage cables with fire-retardant coatings, which are composed of tert-acrylic emulsion water-based materials, fire retardants and plasticizers.

6. The method for wiring hybrid vehicle electrical cables according to claim 3, characterized in that: During the wiring process, ensure that the horizontal distance between the high-voltage cable and the fuel pipeline and brake oil pipe is greater than 100mm, and install a fireproof isolation board between the high-voltage cable and the fuel pipeline and brake oil pipe.

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