Low-emission hybrid electric drive six-axis rail car

Abstract

A methanol fuel tank which is connected with a methanol generator set in a machine room I and provides required fuel for the methanol generator set is arranged in the middle of the bottom of a vehicle frame, and two traction motors which are installed at the bottom of the vehicle frame and connected with three-axle bogies on the same side through transmission shafts are symmetrically arranged on the two sides of the methanol fuel tank; the methanol generator set and the power battery pack are respectively connected with the two traction motors through a rectification control system arranged in the rectification control cabinet; the frame is provided with a ventilator I and a ventilator II which are used for cooling and supplying air to the traction motors on the same side respectively. Electric energy and the methanol generator set adopting methanol fuel are fully combined, waste gas emission is little, the methanol generator set can be independently used, internal combustion power and pure electric power can be combined, diversity of power requirements during rail car operation is increased, the rail car operation environment is improved, two sets of power transmission systems are adopted, the reliability of the car is improved, and the cost is reduced. The energy consumption is reduced, and the environmental pollution influence is small.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway engineering vehicles, specifically relating to a low-emission hybrid electric six-axle railcar. Background Technology

[0002] As the environmental damage caused by petrochemical fuels becomes increasingly severe, the country is paying more and more attention to environmental protection, and energy conservation and environmental protection have become the mainstream of social development. Currently, traditional internal combustion engine railcars have significant pollution from diesel engines. Studies on the energy consumption of the entire vehicle under operating conditions show that diesel engines consume a large amount of fuel at idle, accounting for 17-44% of total fuel consumption; some efficiency factors of the engines are too low, failing to fully utilize the engine's peak efficiency. Therefore, in order to solve the problems of fuel pollution and the resulting energy waste, it is necessary to improve existing railcars. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a low-emission hybrid electric six-axle railcar, which adopts a structure that combines a low-emission methanol generator set with a power battery pack that can be connected to an external power source. It fully combines electrical energy and methanol generator set using methanol fuel, and has the function of an internal combustion engine. It emits less exhaust gas than a diesel engine. The two power methods can be used independently, or the internal combustion power can be combined with pure electric power when needed. This greatly increases the diversity of power requirements during railcar operation, improves the working environment of railcars, and the use of two sets of power transmission systems also improves the reliability of the vehicle, reduces energy consumption, has little impact on environmental pollution, and is green and environmentally friendly.

[0004] The technical solution adopted in this utility model is as follows: a low-emission hybrid electric six-axle railcar, including a frame and three-axle bogies located at both ends of the bottom of the frame. From right to left, the upper part of the frame is provided with a machine room II, a driver's cab, an equipment room, a power battery pack, a rectifier control cabinet, and a machine room I. A methanol fuel tank is located in the middle of the bottom of the frame, which is connected to the methanol generator set in the machine room I and provides it with the required fuel. Two traction motors are symmetrically arranged on both sides of the methanol fuel tank, installed at the bottom of the frame and connected to the three-axle bogies on the same side through a drive shaft. The methanol generator set and the power battery pack are both connected to the two traction motors respectively through a rectifier control system located in the rectifier control cabinet. Two fans I and two fans II are provided on the frame to cool and supply air to the traction motors on the same side respectively.

[0005] The methanol generator set includes a methanol engine and a generator mounted on a common base frame. The power output end of the methanol engine is connected to the generator via a flexible coupling, and the generator is electrically connected to the rectifier control system. An engine radiator is located on the frame of machine room I on the outside of the methanol engine. The inlet and outlet pipes for high and low temperature water connected to the methanol engine and the engine radiator are both flexible pipes. The air inlet and exhaust ends of the methanol engine are fixed on machine room I. The engine radiator is a V-shaped radiator and is driven by an electric motor.

[0006] Furthermore, the rectification control system consists of two sets of rectifier modules, two sets of traction inverter modules, two sets of auxiliary inverter modules, and two DCU chassis, forming two main circuit control loops that are connected to the two traction motors respectively to achieve individual control of the two three-axle bogies. One main circuit control loop rectifies and inverts the three-phase AC power generated by the methanol generator set to power one traction motor; the other main circuit control loop boosts, rectifies, and inverts the DC power from the power battery pack to power the other traction motor. The intermediate DC circuit between the rectifier module and the traction inverter module connects the methanol generator set and the power battery pack in parallel, and the intermediate DC circuit outputs external power supply for auxiliary loads and external sockets through the auxiliary inverter module.

[0007] Furthermore, the ventilation fan I is located in machine room I; the equipment room is equipped with ventilation fan II, air dryer and air braking system valves.

[0008] Furthermore, the traction motor is an AC traction motor, and the three-axle bogie is a three-axle bogie driven by a two-stage reduction axle gearbox.

[0009] Furthermore, the machine room II is equipped with two screw air compressors that provide air supply for the vehicle's air system.

[0010] Furthermore, the power battery pack is charged via an external power source, an internal combustion engine, or electric braking energy feedback.

[0011] Advantages of this utility model compared to the prior art:

[0012] 1. This technical solution adopts a structure that combines a low-emission methanol generator set with a power battery pack that can be connected to an external power source. It fully combines electrical energy with a methanol generator set that uses methanol fuel, and has the function of an internal combustion engine. It has low exhaust emissions, minimal impact on environmental pollution, and is green and environmentally friendly.

[0013] 2. This technical solution can be driven by either an internal combustion engine or a power battery. Using a methanol engine as the internal combustion engine reduces operating costs and environmental pollution. Moreover, the vehicle has a resistance braking function, and the power battery can be charged through an external power source, the internal combustion engine, and the electric braking energy feedback charging, thus reducing operating costs.

[0014] 3. The technical solution has a reasonable structural design, is clean and environmentally friendly, and the two power systems serve as backups for each other, which improves the reliability of the vehicle, greatly increases the diversity of power requirements during railcar operation, improves the working environment of the railcar, and the use of two power transmission systems also improves the reliability of the vehicle and reduces energy consumption. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the mechanical transmission part of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the methanol generator set of this utility model. Detailed Implementation

[0018] The following will be based on the embodiments of this utility model. Figure 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] Low-emission hybrid electric six-axle rail vehicle, such as Figure 1 As shown, the railcar includes a frame 1 and three-axle bogies 2 located at both ends of the bottom of the frame 1. The three-axle bogies 2 increase the load-bearing capacity and the onboard power of the railcar. From right to left, the upper part of the frame 1 is equipped with a machine room II 10, a driver's cab 9, an equipment room 8, a power battery pack 5, a rectifier control cabinet 4, and a machine room I 3. At the bottom center of the frame 1, a methanol fuel tank 6 is located, connected to a methanol generator set 3-1 in machine room I 3 and providing it with the necessary fuel. Two traction motors 7 are symmetrically arranged on both sides of the methanol fuel tank 6, mounted on the bottom of the frame 1 and connected to the three-axle bogies 2 on the same side via drive shafts 11. Figure 2 As shown; the methanol generator set 3-1 and the power battery pack 5 are both connected to the two traction motors 7 respectively through the rectifier control system located in the rectifier control cabinet 4; the frame 1 is equipped with two fans I 3-2 and II 8-1 respectively to cool and supply air to the traction motors 7 on the same side, reducing the temperature of the traction motors 7 and ensuring the normal operation of the traction motors 7; in the above structure, the low-emission methanol generator set 3-1 is combined with the power battery pack 5 that can be connected to an external power source, which fully combines electrical energy and the methanol generator set 3-1 using methanol fuel, and has the function of an internal combustion engine, with less exhaust emissions and less impact on environmental pollution, making it green and environmentally friendly; it can be driven by either an internal combustion engine or a power battery, and using a methanol engine as an internal combustion engine reduces operating costs and environmental pollution; moreover, the whole vehicle has a resistance braking function, and the power battery can be charged by an external power source, or charged by the internal combustion engine and by electric braking energy feedback charging, reducing operating costs.

[0022] The driver's cab 9 is a dual-end operation, containing a vehicle control device for receiving commands from the vehicle control device. It is connected and integrated with the methanol generator set 3-1 and the power battery pack 5, which combine two power types, to realize the starting, acceleration, and braking working modes of the traction motor 7.

[0023] like Figure 3As shown, the specific structure of the methanol generator set 3-1 is as follows: The methanol generator set 3-1 includes a methanol engine 3-1-3 and a generator 3-1-1 mounted on a common base frame 3-1-8. The power output end of the methanol engine 3-1-3 is connected to the generator 3-1-1 via a flexible coupling 3-1-2, and the generator 3-1-1 is electrically connected to the rectifier control system. An engine radiator 3-1-6 is located on the machine room I3 frame outside the methanol engine 3-1-3, and is used to connect the methanol engine 3-1-3 and... The inlet and outlet pipes 3-1-7 for high and low temperature water connected to the engine radiator 3-1-6 are both flexible pipes. The air inlet end 3-1-4 and exhaust end 3-1-5 of the methanol engine 3-1-3 are both fixed on the machine room I3. The engine radiator 3-1-6 is a V-shaped radiator and is driven by an electric motor. Since this structure is a six-axle railcar with large traction and high power, the engine radiator 3-1-6 adopts a V-shaped radiator, which effectively increases the heat dissipation area of ​​the methanol engine 3-1-3 and improves the heat dissipation effect.

[0024] The rectification control system is as follows: The rectification control system consists of two sets of rectification modules, two sets of traction inverter modules, two sets of auxiliary inverter modules, and two DCU chassis. It forms two main circuit control loops that are connected to the two traction motors 7 respectively, realizing the individual control of the two three-axle bogies 2. The DCU chassis is used to collect the traction information of the controlled railcar. One main circuit control loop rectifies and inverts the three-phase AC power generated by the methanol generator set 3-1 to supply power to one traction motor 7. The other main circuit control loop boosts, rectifies, and inverts the DC power from the power battery pack 5 to supply power to the other traction motor 7. The intermediate DC circuit between the rectification module and the traction inverter module connects the methanol generator set 3-1 and the power battery pack 5 in parallel. The intermediate DC circuit outputs external power supply for auxiliary loads and external sockets through the auxiliary inverter module.

[0025] Among them, the methanol generator set 3-1 is connected to the rectifier module in the main circuit control loop, and the three-phase AC power generated by the methanol generator set 3-1 is rectified into DC power. The rectifier module in this loop is electrically connected to the traction inverter module and converts the rectified power into AC power to supply the two traction motors 7, thereby realizing the power supply mode of the methanol generator set 3-1.

[0026] The power battery pack 5 is connected to the traction inverter module in another main circuit control loop, and converts the DC power of the power battery pack 5 into AC power to supply the traction motor 7, thus realizing the power supply mode of the power battery pack 5.

[0027] The intermediate DC circuit between the rectifier module and the traction inverter module connects the methanol generator set 3-1 and the power battery pack 5 in parallel. According to different power requirements, the power battery pack 5 adopts a fixed power output. The rectifier controller controls the AC output of the methanol generator set 3-1 according to the wheel power requirements. After rectification, the AC power is mixed with the power battery to achieve hybrid power supply mode.

[0028] The battery configuration of the power battery pack 5 is compatible with the power of the methanol generator set 3-1. It has a battery management system that monitors the battery physical parameters in real time, performs online diagnosis and early warning, and performs charge and discharge control, equalization management and thermal management to ensure the normal operation of the battery pack.

[0029] The ventilation fan I3-2 is located in the machine room I3; the equipment room 8 is equipped with a ventilation fan II8-1, an air dryer 8-2 and an air brake system valve 8-3, and the ventilation fan I3-2 and the ventilation fan II8-1 provide cooling air to the two traction motors 7 respectively.

[0030] The traction motor 7 is an AC traction motor, and the three-axle bogie 2 is a three-axle bogie driven by a two-stage reduction axle gearbox.

[0031] The machine room II10 is equipped with two screw air compressors 10-1 that provide air supply for the vehicle's air system. The two screw air compressors 10-1 serve as backups for each other and can also work simultaneously to ensure the safety and reliability of the air system. Specifically, the power battery pack 5 is charged through an external power source, an internal combustion engine, or electric braking energy feedback. During electric braking, the traction motor 7 converts the vehicle's kinetic energy into electrical energy, which is fed back to the power battery pack 5 through the traction inverter module to achieve braking energy recovery. After the power battery pack 5 is fully charged, the braking energy is consumed through the braking resistor.

[0032] When the vehicle is empty or has a small tonnage, the power battery pack 5 is the main power source. When tractioning a large tonnage train, the power control system controls the speed of the methanol engine 3-1-3 based on the vehicle feedback information, so that the electricity generated by the methanol generator set 3-1 can supplement the power battery. This allows the railcar to make full use of electrical energy, reduces engine emissions, saves energy and protects the environment, and reduces operating costs.

[0033] This technical solution features a reasonable structural design that is clean and environmentally friendly. The two power systems serve as backups for each other, improving vehicle reliability and greatly increasing the diversity of power requirements during railcar operation. This also improves the operating environment of the railcar. Furthermore, the use of two power transmission systems enhances vehicle reliability and reduces energy consumption.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-emission hybrid electric six-axle railcar, characterized in that: The vehicle includes a frame (1) and three-axle bogies (2) located at both ends of the bottom of the frame (1). The upper part of the frame (1) is provided with machine room II (10), driver's cab (9), equipment room (8), power battery pack (5), rectifier control cabinet (4) and machine room I (3) from right to left. The bottom of the frame (1) is provided with a methanol fuel tank (6) connected to the methanol generator set (3-1) in the machine room I (3) and providing it with the required fuel. Two traction motors (7) are symmetrically arranged on both sides of the methanol fuel tank (6), installed at the bottom of the frame (1) and connected to the three-axle bogies (2) on the same side through a drive shaft (11). The methanol generator set (3-1) and the power battery pack (5) are connected to the two traction motors (7) respectively through the rectifier control system located in the rectifier control cabinet (4). The frame (1) is provided with two fans I (3-2) and fans II (8-1) respectively for cooling and supplying air to the traction motors (7) on the same side.

2. The low-emission hybrid electric six-axle railcar according to claim 1, characterized in that: The methanol generator set (3-1) includes a methanol engine (3-1-3) and a generator (3-1-1) mounted on a common base frame (3-1-8). The power output end of the methanol engine (3-1-3) is connected to the generator (3-1-1) via a flexible coupling (3-1-2), and the generator (3-1-1) is electrically connected to the rectifier control system. The methanol engine (3-1-3) is provided with an engine radiator (3-1-6) located on the frame of machine room I (3). The inlet and outlet pipes (3-1-7) for high and low temperature water connected to the methanol engine (3-1-3) and the engine radiator (3-1-6) are both flexible pipes. The air inlet end (3-1-4) and the exhaust end (3-1-5) of the methanol engine (3-1-3) are both fixed on machine room I (3). The engine radiator (3-1-6) is a V-type radiator and is driven by an electric motor.

3. The low-emission hybrid electric six-axle railcar according to claim 1, characterized in that: The rectification control system consists of two sets of rectification modules, two sets of traction inverter modules, two sets of auxiliary inverter modules, and two DCU chassis. It consists of two main circuit control loops that are connected to the two traction motors (7) respectively to realize the individual control of the two three-axis bogies (2). One main circuit control loop rectifies and inverts the three-phase AC power generated by the methanol generator set (3-1) to supply power to one traction motor (7). The other main circuit control loop boosts, rectifies, and inverts the DC power from the power battery pack (5) to supply power to the other traction motor (7). The intermediate DC circuit between the rectification module and the traction inverter module connects the methanol generator set (3-1) and the power battery pack (5) in parallel. The intermediate DC circuit outputs external power supply for auxiliary loads and external sockets through the auxiliary inverter module.

4. The low-emission hybrid electric six-axle railcar according to claim 1, characterized in that: The ventilation fan I (3-2) is located in machine room I (3); the equipment room (8) is equipped with ventilation fan II (8-1), air dryer (8-2) and air brake system valve (8-3).

5. The low-emission hybrid electric six-axle railcar according to claim 1, characterized in that: The traction motor (7) is an AC traction motor, and the three-axle bogie (2) is a three-axle bogie driven by a two-stage reduction axle gearbox.

6. The low-emission hybrid electric six-axle railcar according to any one of claims 1-5, characterized in that: The machine room II (10) is equipped with two screw air compressors (10-1) that provide air source for the vehicle's air system.

7. The low-emission hybrid electric six-axle railcar according to claim 6, characterized in that: The power battery pack (5) is charged by an external power source, an internal combustion engine, or by electric braking energy feedback.

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