CN111409653A - Power conversion system of working vehicle - Google Patents

Power conversion system of working vehicle Download PDF

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Publication number
CN111409653A
CN111409653A CN202010314495.0A CN202010314495A CN111409653A CN 111409653 A CN111409653 A CN 111409653A CN 202010314495 A CN202010314495 A CN 202010314495A CN 111409653 A CN111409653 A CN 111409653A
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CN
China
Prior art keywords
power
traction motor
vehicle
frame
frequency converter
Prior art date
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Granted
Application number
CN202010314495.0A
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Chinese (zh)
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CN111409653B (en
Inventor
隆孝军
李连凯
刘军
郭力
董卿
徐华
邓茂光
郝翰
贾强
孟远文
靳宁
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CRRC Ziyang Co Ltd
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CRRC Ziyang Co Ltd
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Priority to CN202010314495.0A priority Critical patent/CN111409653B/en
Publication of CN111409653A publication Critical patent/CN111409653A/en
Application granted granted Critical
Publication of CN111409653B publication Critical patent/CN111409653B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61CLOCOMOTIVES; MOTOR RAILCARS
    • B61C3/00Electric locomotives or railcars
    • B61C3/02Electric locomotives or railcars with electric accumulators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00Electric propulsion with power supply external to the vehicle
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to the field of rail transit, aims to solve the problems that the driving mode of an operation vehicle in the prior art is single and the normal operation of the operation vehicle under different environments cannot be met, and provides a power conversion system of the operation vehicle, which comprises a vehicle body; the pantograph, the power battery and the generator set are arranged on the vehicle body, and four power working conditions can be formed by arranging the pantograph, the power battery and the generator set; the working condition I is as follows: the power grid directly provides power for the operation vehicle, and the working condition is as follows: the power battery directly provides power for the operation vehicle, and the working condition is three: the generator set directly provides power for the operation vehicle, and the working condition is four: the power battery and the generator set provide power for the working vehicle in parallel. The four-power-driven working condition has the advantages that the four-power-driven working condition is realized, the working vehicle is driven to run by power under any environment, and the application range of the working vehicle is effectively enlarged.

Description

Power conversion system of working vehicle
Technical Field
The invention relates to the field of rail transit, in particular to a power conversion system of an operation vehicle.
Background
The existing operation vehicle is an internal combustion hydraulic transmission contact network operation vehicle, a diesel engine drives a torque converter to rotate, a gearbox is driven to rotate through hydraulic transmission oil, the gearbox finally reaches a wheel axle gearbox through an output shaft drive transfer case to drive the locomotive to operate, but the driving mode is too single, and the operation vehicle cannot adapt to various environments.
Disclosure of Invention
The invention aims to provide a power conversion system of an operation vehicle, which aims to solve the problems that the operation vehicle in the prior art has a single driving mode and cannot normally run under different environments.
The embodiment of the invention is realized by the following steps:
the embodiment of the invention provides a power conversion system of an operation vehicle, which comprises a vehicle body;
the pantograph, the power battery and the generator set are arranged on the vehicle body, and four power working conditions can be formed by arranging the pantograph, the power battery and the generator set;
the working condition I is as follows: one end of the pantograph can be connected to a power grid, the other end of the pantograph is connected with a transformer, one end of the transformer is connected with a frequency converter, one end of the frequency converter is connected with a traction motor, one end of the traction motor is connected with a traveling part, the traveling part is fixed on the vehicle body, when the working vehicle is positioned on a formal operation line and performs traction operation, the power grid is electrified, high voltage of the power grid is reduced to low voltage through the transformer and is transmitted into the frequency converter, the alternating current suitable for the traction motor is inverted through the frequency converter and drives the traction motor to rotate, the traveling part on the vehicle body is driven to operate through a universal shaft connected to the traction motor, and finally the working vehicle is driven to operate;
working conditions are as follows: one end of the power battery is connected with the frequency converter, one end of the frequency converter is connected with the traction motor, one end of the traction motor is connected with the travelling part, when the line stringing operation or the cold slipping operation is carried out, the power battery can supply power through the power battery, the current of the power battery is inverted into the alternating current suitable for the traction motor through the frequency converter and drives the traction motor to rotate, the universal shaft connected with the traction motor drives the travelling part on the vehicle body to operate, and finally the operation vehicle is driven to operate;
working conditions are as follows: the generator set is connected with the traction motor, when no high-voltage power receiving condition exists and the power battery fails, the generator set can independently supply power, alternating current generated by the generator set is directly supplied to the traction motor and drives the traction motor to rotate, a universal shaft connected with the traction motor drives the traveling part on the vehicle body to operate, and finally the operation vehicle is driven to operate;
working conditions are as follows: when the power battery is in power shortage or needs high-power output, the power battery and the generator set can be used for supplying power in parallel.
When the power supply system is used, when the power grid is electrified, the pantograph is contacted with the power grid to provide power for the operation vehicle, when the power grid is in line operation or cold-slip operation, the operation vehicle provides power for the operation vehicle through the power battery, when no high-voltage power receiving condition exists and the power battery breaks down, the power generator set is adopted to provide power for the operation vehicle independently, and when the power battery is in power shortage or needs high-power output, the power battery and the power generator set are adopted to supply power in parallel so as to provide power for the operation vehicle.
According to the arrangement, the working vehicle can convert different powers to drive the working vehicle to operate under different conditions, and the application range of the working vehicle is effectively enlarged.
Optionally: the vehicle body is provided with a driving box and a frame which are connected with each other, and the walking part is fixedly connected to the lower surface of the frame; the steering box is fixedly connected to the upper surface of the frame and is positioned on the front section of the frame.
Optionally: the upper surface of the frame is provided with a lifting platform, a generator set and a power cabinet, and the lifting platform, the generator set and the power cabinet are all located on the rear section of the frame.
Optionally: the power battery is connected to the lower surface of the frame and is connected with the frequency converter through a conduction device.
Thus, the conducting device adopts an electric wire or a component capable of transmitting current.
Optionally: the traction motor is positioned below the frame and fixedly connected to the lower surface of the frame, and the traction motor is matched with the walking part.
Optionally: the traveling part is provided with a wheel shaft, wheel pairs are arranged at two ends of the wheel shaft, and the axial direction of the wheel shaft is vertical to the length direction of the frame; the middle section of the wheel shaft is connected with a gear box which is matched with the wheel shaft, and the rotating shaft of the traction motor is connected with the gear box through a universal shaft.
Optionally: the walking parts are arranged into a plurality of groups and are evenly distributed along the length direction of the frame at intervals, and each walking part is connected with one traction motor.
Optionally: an integrated cabinet, an operation table, an air conditioner and a seat are arranged in the driving box, and a charger, the transformer and the frequency converter are arranged in the integrated cabinet; the operating platform is provided with a horizontal pushing device and a video monitoring system display screen.
So set up, be favorable to the concentrated arrangement of equipment, the driver's cabin inner space is wider and succinct more.
Optionally: the operating platforms are arranged into a plurality of operating platforms and distributed in the carriage along the length direction of the frame.
In combination with the above description, the power conversion system for the working vehicle disclosed by the invention has four power working conditions, so that the working vehicle can convert different powers to drive the working vehicle to operate under different conditions, and the application range of the working vehicle is effectively enlarged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic illustration of a work vehicle power conversion system according to an embodiment of the present disclosure;
FIG. 2 illustrates a top view of a work vehicle power conversion system in an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram illustrating the interconnection between the traction motor and the traveling unit in the embodiment of the present invention.
Icon: 1-a vehicle body; 2-pantograph; 3-a power battery; 4-a generator set; 5-a transformer; 6-a frequency converter; 7-a traction motor; 8-a walking part; 9-cardan shaft; 10-a steering box; 11-a frame; 12-front section 13-lifting platform; 15-a power cabinet; 16-a rear section; 17-a wheel axle; 18-wheel pair; 19-a gearbox; 20-a rotating shaft; 21-an integrated cabinet; 22-an operation table; 23-air conditioning; 24-a seat; 25-a charger; 26-horizontal pushing equipment; 27-video monitoring system display screen; 28-driver.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1 and 2, the present embodiment provides a power conversion system for a work vehicle, including a vehicle body 1; the pantograph 2, the power battery 3 and the generator set 4 are arranged on the vehicle body 1, and four power working conditions can be formed by arranging the pantograph 2, the power battery 3 and the generator set 4;
the working condition I is as follows: one end of a pantograph 2 can be connected to a power grid, the other end of the pantograph 2 is connected with a transformer 5, one end of the transformer 5 is connected with a frequency converter 6, one end of the frequency converter 6 is connected with a traction motor 7, one end of the traction motor 7 is connected with a walking part 8, the walking part 8 is fixed on a vehicle body 1, when a working vehicle is positioned on a formal operation line and performs traction operation, the power grid is electrified at the moment, high voltage of the power grid is reduced to low voltage through the transformer 5 and is transmitted into the frequency converter 6, the alternating current suitable for the traction motor 7 is inverted through the frequency converter 6 and drives the traction motor 7 to rotate, the walking part 8 on the vehicle body 1 is driven to operate through a universal shaft 9 connected to the traction motor 7, and finally the working;
working conditions are as follows: one end of a power battery 3 is connected with a frequency converter 6, one end of the frequency converter 6 is connected with a traction motor 7, one end of the traction motor 7 is connected with a walking part 8, when the stringing operation or the cold slip operation is carried out, the power can be supplied to the operation vehicle through the power battery 3, the current of the power battery 3 is inverted into the alternating current suitable for the traction motor 7 through the frequency converter 6 and drives the traction motor 7 to rotate, and a universal shaft 9 connected with the traction motor 7 drives the walking part 8 on the vehicle body 1 to operate, so that the operation vehicle is finally driven to operate;
working conditions are as follows: the generator set 4 is connected with the traction motor 7, when no high-voltage power receiving condition exists and the power battery 3 breaks down, the power can be supplied independently through the generator set 4, alternating current generated by the generator set 4 is directly supplied to the traction motor 7 and drives the traction motor 7 to rotate, a traveling part 8 on the vehicle body 1 is driven to operate through a universal shaft 9 connected with the traction motor 7, and finally the operation vehicle is driven to operate;
working conditions are as follows: when the power battery 3 is in short power or needs high-power output, the power battery 3 and the generator set 4 can be used for supplying power in parallel.
During the use, when the electric wire netting was electrified, adopt pantograph 2 contact electric wire netting to provide power for the operation car, when stringing operation or cold-sliding operation, the operation car provides power for the operation car through adopting power battery 3, when no high-pressure receiving condition, when power battery 3 breaks down again simultaneously, adopt generating set 4 to provide power for the operation car alone, when power battery 3 lack of electricity or when needing high-power output, adopt power battery 3 and generating set 4 parallel power supply to provide power for the operation car.
According to the arrangement, the working vehicle can convert different powers to drive the working vehicle to operate under different conditions, and the application range of the working vehicle is effectively enlarged.
Referring to fig. 1 and 2, a vehicle body 1 has a cab box 10 and a frame 11 connected to each other, and a traveling part 8 is fixedly connected to a lower surface of the frame 11; the cab box 10 is fixedly attached to the upper surface of the frame 11 and is located on the front section 12 of the frame 11.
The side of the cab box 10 is provided with a transparent window to facilitate the view of the exterior of the vehicle body 1 by the driver 28.
The front end and the rear end of the frame 11 are provided with car couplers which can be connected with a plurality of carriages in series.
The upper surface of frame 11 is equipped with lift platform 13, generating set 4 and power cabinet 15, and lift platform 13, generating set 4 and power cabinet 15 all are located the back end 16 of frame 11, and lift platform 13 can go up and down and rotate, provides work platform for the staff that the electric wire netting overhauld and was set a line.
The power battery 3 is connected to the lower surface of the frame 11 and is connected with the frequency converter 6 through a conduction device.
So configured, the conducting means is a wire or a member capable of transmitting an electric current.
Optionally: the traction motor 7 is positioned below the frame 11 and is fixedly connected to the lower surface of the frame 11, and the traction motor 7 is matched with the walking part 8.
Referring to fig. 1 and 3, the traveling part 8 has an axle 17, wheel sets 18 are arranged at both ends of the axle 17, and the axial direction of the axle 17 is perpendicular to the longitudinal direction of the frame 11; the middle section of the wheel shaft 17 is connected with a gear box 19 which is matched with the wheel shaft, and a rotating shaft 20 of the traction motor 7 is connected with the gear box 19 through a universal shaft 9.
The walking parts 8 are arranged into a plurality of groups and are distributed along the length direction of the frame 11 at intervals, and each walking part 8 is connected with a traction motor 7.
Referring to fig. 2, an integrated cabinet 21, an operation table 22, an air conditioner 23 and a seat 24 are arranged in the driving box 10, and a charger 25, a transformer 5 and a frequency converter 6 are arranged in the integrated cabinet 21; the operation table 22 is provided with a horizontal pushing device 26 and a video monitoring system display screen 27 communicated with a camera, and a seat 24 arranged in the cab 10 is arranged to be rotatable and movable, so that a driver 28 can operate the vehicle body 1 conveniently.
The arrangement of the horizontal pushing device 26 and the video monitoring system display screen 27 is beneficial to realizing the monitoring of road conditions and above the platform and the butt joint of the driver 28 and ground signals.
So set up, be favorable to the concentrated arrangement of equipment, the space is wider and succinct in steering box 10.
The operation table 22 is provided in a plurality of numbers and is distributed in the carriage along the length direction of the frame 11.
In one implementation of this embodiment: three charging conditions are also provided:
the working condition I is as follows: the ground power supply is charged, and the current of the ground power supply is transmitted to the charger 25 and charges the power battery 3 through the charger 25.
Working conditions are as follows: and (3) charging the power grid, wherein after the high-voltage current of the power grid is subjected to voltage reduction processing by the transformer 5 and inversion processing by the frequency converter 6, the current is transmitted into the charger 25 and charges the power battery 3 through the charger 25.
Working conditions are as follows: the generator set 4 is charged, the generator set 4 directly generates power, the current is directly transmitted into the charger 25, and then the power battery 3 is charged through the charger 25.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides an operation car power conversion system for the transmission mode of conversion power under different operating modes which characterized in that:
comprises a vehicle body;
the pantograph, the power battery and the generator set are arranged on the vehicle body, and four power working conditions can be formed by arranging the pantograph, the power battery and the generator set;
the working condition I is as follows: one end of the pantograph can be connected to a power grid, the other end of the pantograph is connected with a transformer, one end of the transformer is connected with a frequency converter, one end of the frequency converter is connected with a traction motor, one end of the traction motor is connected with a walking part, the walking part is fixed on the vehicle body, when the operation vehicle is positioned on a formal operation line and performs traction operation, the power grid is electrified, high voltage of the power grid is reduced to low voltage through the transformer and is transmitted into the frequency converter, the alternating current suitable for the traction motor is inverted through the frequency converter and drives the traction motor to rotate, the walking part on the vehicle body is driven to operate through a universal shaft connected to the traction motor, and finally the operation vehicle is driven to operate;
working conditions are as follows: one end of the power battery is connected with the frequency converter, one end of the frequency converter is connected with the traction motor, one end of the traction motor is connected with the walking part, when the stringing operation or the cold sliding operation is carried out, the power battery can supply power, the current of the power battery is inverted into the alternating current suitable for the traction motor through the frequency converter and drives the traction motor to rotate, the walking part on the vehicle body is driven to run through the universal shaft connected with the traction motor, and finally the operation vehicle is driven to run;
working conditions are as follows: the power generating set is connected with the traction motor, when no high-voltage power receiving condition exists and the power battery breaks down, the power generating set can independently supply power, alternating current generated by the power generating set is directly supplied to the traction motor and drives the traction motor to rotate, a universal shaft connected with the traction motor drives the traveling part on the vehicle body to operate, and finally the operation vehicle is driven to operate;
working conditions are as follows: when the power battery is in power shortage or high-power output is needed, the power battery and the generator set can be used for supplying power in parallel.
2. The work vehicle power conversion system of claim 1, wherein:
the vehicle body is provided with a driving box and a frame which are connected with each other, and the walking part is fixedly connected to the lower surface of the frame;
the driving box is fixedly connected to the upper surface of the frame and is positioned on the front section of the frame.
3. The work vehicle power conversion system of claim 2, wherein:
the upper surface of frame is equipped with lift platform, generating set and power cabinet, lift platform, generating set and power cabinet all are located on the back end of frame.
4. A work vehicle power conversion system according to claim 3, wherein:
the power battery is connected to the lower surface of the frame and is connected with the frequency converter through a conduction device.
5. The work vehicle power conversion system of claim 2, wherein:
the traction motor is positioned below the frame and fixedly connected to the lower surface of the frame, and the traction motor is matched with the walking part.
6. The work vehicle power conversion system of claim 5, wherein:
the traveling part is provided with a wheel shaft, wheel pairs are arranged at two ends of the wheel shaft, and the axial direction of the wheel shaft is vertical to the longitudinal direction of the frame;
the middle section of the wheel shaft is connected with a gear box which is matched with the wheel shaft, and a rotating shaft of the traction motor is connected to the gear box through a universal shaft.
7. The work vehicle power conversion system of claim 6, wherein:
the walking parts are arranged into a plurality of groups and are evenly distributed along the length direction of the frame at intervals, and each walking part is connected with one traction motor.
8. The work vehicle power conversion system of claim 2, wherein:
an integrated cabinet, an operation table, an air conditioner and a seat are arranged in the driving box, and a charger, the transformer and the frequency converter are arranged in the integrated cabinet;
and a horizontal pushing device and a video monitoring system display screen are arranged on the operating platform.
9. The work vehicle power conversion system of claim 1, wherein:
the operation panel sets up to a plurality of to along the length direction distribution of frame in the railway carriage.
CN202010314495.0A 2020-04-21 2020-04-21 Power conversion system of working vehicle Active CN111409653B (en)

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CN111409653B CN111409653B (en) 2020-11-03

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CN111804900A (en) * 2020-07-20 2020-10-23 中车资阳机车有限公司 Shaft type counterpoint tractor of C0
CN112406913A (en) * 2020-12-06 2021-02-26 中车永济电机有限公司 Two-axle pure electric heavy rail car
CN113997958A (en) * 2021-12-03 2022-02-01 中车资阳机车有限公司 Three-power locomotive group with power battery car and extensible traction topological structure

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CN111804900A (en) * 2020-07-20 2020-10-23 中车资阳机车有限公司 Shaft type counterpoint tractor of C0
CN111804900B (en) * 2020-07-20 2021-12-17 中车资阳机车有限公司 Shaft type counterpoint tractor of C0
CN112406913A (en) * 2020-12-06 2021-02-26 中车永济电机有限公司 Two-axle pure electric heavy rail car
CN113997958A (en) * 2021-12-03 2022-02-01 中车资阳机车有限公司 Three-power locomotive group with power battery car and extensible traction topological structure

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