WO2020037826A1 - Main and auxiliary transmission system of internal combustion locomotive, and internal combustion locomotive - Google Patents

Abstract

A main and auxiliary transmission system of an internal combustion locomotive, comprising a locomotive internal combustion engine (21), a generator (22), a main rectifying device (23), a main intermediate direct-current circuit (24), a main transmission system (25), an auxiliary converter device (26), an auxiliary intermediate direct-current circuit (27), an auxiliary transmission system (28), a power battery charging and discharging device (29) and a power battery (30). In the system, when the generator (22) stops generating electricity due to the failure of the main transmission system (25), the power battery (30) is used to power the auxiliary transmission system (28), enabling the auxiliary transmission system (28) to be able to operate normally for a period of time when the main transmission system (25) fails, thereby gaining time for the troubleshooting and recovery of the main transmission system. Further provided is an internal combustion locomotive comprising said transmission system.

Description

Main and auxiliary drive systems of diesel locomotive and diesel locomotive Technical field

Embodiments of the present invention relate to the technical field of a diesel locomotive, and in particular, to a diesel locomotive main and auxiliary transmission system and a diesel locomotive.

Background technique

The electric drive system of a diesel locomotive is divided into two parts, the main drive system and the auxiliary drive system. The main drive system mainly provides energy for the traction motor, and the auxiliary drive system mainly provides energy for auxiliary systems such as fans, cooling fans, air compressors and control circuits.

Among them, FIG. 1 is a schematic diagram of a diesel locomotive transmission system in the prior art. As shown in FIG. 1, a diesel locomotive is provided with a main generator, and the main generator provides power to both a main transmission system and an auxiliary transmission system. However, because the main drive system and the auxiliary drive system share a main generator to provide energy, when the main drive system fails, for the safety of the locomotive, the main generator will stop outputting power to the outside. When the auxiliary drive system is unable to obtain electrical energy, the auxiliary drive system is powered off.

Summary of the Invention

The embodiments of the present invention provide a main and auxiliary drive system for a diesel locomotive and a diesel locomotive, which are used to solve the problem that the main drive system and the auxiliary drive system share a generator in the prior art. When the main drive system fails, for the safety of the locomotive, the main generator It will stop outputting electrical energy. Since the main generator has stopped outputting electrical energy, the auxiliary drive system will not be able to obtain power at this time, which will cause the problem of the auxiliary drive system power failure.

In a first aspect, an embodiment of the present invention provides a main and auxiliary transmission system for a diesel locomotive, including: a locomotive internal combustion engine, a generator, a main rectifier, a main intermediate DC circuit, a main transmission system, an auxiliary transmission system, an auxiliary converter, and an auxiliary intermediate DC circuit, power battery charging and discharging device, and power battery.

The locomotive internal combustion engine, generator, main rectifier, and main intermediate DC circuit are connected in sequence, and the main intermediate DC circuit is connected to the main drive system and the auxiliary converter device, and the auxiliary intermediate DC circuit is respectively connected to the auxiliary The converter device, the auxiliary transmission system, and the power battery charging and discharging device are connected, and the power battery charging and discharging device is connected to the power battery. among them,

The generator is configured to use the mechanical energy generated by the internal combustion engine of the locomotive to generate a first alternating current;

The main rectifying device is configured to rectify a first alternating current generated by the generator into a first voltage direct current;

The main intermediate direct current circuit is configured to output the direct current of the first voltage to the main drive system and the auxiliary converter device;

The auxiliary converter is configured to transform the direct current of the first voltage into a direct current of a second voltage, and the second voltage is smaller than the first voltage;

The auxiliary intermediate direct current circuit is configured to output the direct current of the second voltage to the auxiliary transmission system;

The generator is further configured to stop generating the first AC power when the main drive system fails;

The power battery charging and discharging device is configured to output a third voltage direct current to the auxiliary intermediate direct current loop according to the electrical energy stored in the power battery when the main drive system fails;

The auxiliary intermediate direct current circuit is further configured to output the direct current of the third voltage to the auxiliary transmission system.

In some embodiments, the auxiliary intermediate direct current circuit is further configured to output the direct current of the second voltage to the power battery charging and discharging device.

The power battery charging and discharging device is configured to charge the power battery according to the direct current of the second voltage.

In some embodiments, the main drive system includes a traction motor and a main inverter, and the main inverter is connected between the traction motor and the main intermediate direct current circuit.

The traction motor is configured to generate a second alternating current when the diesel locomotive is braking;

The main inverter is configured to rectify the second alternating current into a direct current of a fourth voltage;

The main intermediate direct current circuit is further configured to output the direct current of the fourth voltage to the auxiliary converter device;

The auxiliary converter is configured to transform the direct current of the fourth voltage into a direct current of a fifth voltage, and the fifth voltage is smaller than the fourth voltage;

The auxiliary intermediate direct current circuit is configured to output the direct current of the fifth voltage to the auxiliary transmission system;

The auxiliary intermediate DC circuit is further configured to output the fifth-voltage direct current to the power battery charging and discharging device;

The power battery charging and discharging device is configured to charge the power battery according to the fifth-voltage direct current.

In some embodiments, the system further includes: a braking chopper device and a braking resistor; the braking chopper device is connected between the braking resistor and the main intermediate direct current circuit.

The main intermediate direct current circuit is further configured to output the direct current of the fourth voltage to the brake chopper device;

The brake chopper device is configured to control a current outputting the direct current of the fourth voltage to the braking resistor.

In some embodiments, the system further includes: a changeover switch; the changeover switch is connected between the power battery charge and discharge device and the main intermediate direct current circuit.

The power battery charging and discharging device is further configured to output a third voltage direct current to the main intermediate direct current loop according to the electrical energy stored in the power battery when the transfer switch is turned on;

The main intermediate direct current circuit is configured to output the direct current of the third voltage to a main transmission system.

In some embodiments, the power battery charging and discharging device is further configured to output a third voltage direct current to the auxiliary intermediate direct current circuit according to the electrical energy stored in the power battery when the internal combustion engine of the locomotive is in an idling condition. .

In some embodiments, the power battery is a lithium titanate battery.

In some embodiments, the auxiliary converter device includes an isolation transformer;

The isolation transformer is used to electrically isolate the main intermediate direct current circuit from the auxiliary intermediate direct current circuit.

In some embodiments, the auxiliary transmission system includes: a control battery and a control battery charger motor; the control battery charger is connected to the auxiliary intermediate DC circuit, and the control battery is connected to the control battery charger;

The power battery charging and discharging device is further configured to output a third voltage direct current to the auxiliary intermediate direct current loop according to the electrical energy stored in the power battery;

The auxiliary intermediate direct current loop is further configured to output the direct current of the third voltage to the control battery charger;

The control battery charger is configured to charge the control battery after adjusting the third voltage direct current to a sixth voltage direct current.

In a second aspect, an embodiment of the present invention provides a diesel locomotive, including the main and auxiliary transmission systems of the diesel locomotive according to any one of the first aspects of the embodiments of the present invention.

In the embodiment of the present invention, the main and auxiliary transmission systems of diesel locomotive and diesel locomotive are provided with a power battery charging and discharging device and a power battery on the main and auxiliary transmission systems of the diesel locomotive. When the main transmission system fails, causing the generator to stop generating power, the power is used. The battery provides electric energy to the auxiliary transmission system, and at the same time, the voltage of the electric energy provided by the power battery is processed into a voltage required by the auxiliary transmission system using a power battery charging and discharging device. It solves the problem that the main drive system fails and the auxiliary drive system is also powered off when the generator stops generating power. This ensures that the auxiliary drive system can work normally for a period of time when the main drive system fails, to troubleshoot and recover. The main drivetrain fights for time.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

1 is a schematic diagram of a diesel locomotive transmission system in the prior art;

2 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to an embodiment of the present invention;

3 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to another embodiment of the present invention;

4 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to another embodiment of the present invention;

5 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to another embodiment of the present invention;

6 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of a diesel locomotive according to an embodiment of the present invention.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in combination with the drawings in the embodiments of the present invention. It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 2 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to an embodiment of the present invention. As shown in FIG. 2, the main and auxiliary transmission system of the diesel locomotive in this embodiment may include: a locomotive internal combustion engine 21, a generator 22, a main rectifier 23, a main intermediate direct current circuit 24, a main transmission system 25, an auxiliary converter 26, and an auxiliary The intermediate DC circuit 27, the auxiliary transmission system 28, the power battery charging and discharging device 29, and the power battery 30.

Specifically, the locomotive internal combustion engine 21, the generator 22, the main rectifier 23, and the main intermediate DC circuit 24 are connected in this order. The main intermediate DC circuit 24 is connected to the main drive system 25 and the auxiliary converter device 26. The auxiliary intermediate DC circuit 27 is connected to The auxiliary converter 26, the auxiliary transmission system 28, and the power battery charging and discharging device 29 are connected, and the power battery charging and discharging device 29 is connected to the power battery 30.

The generator 22 is configured to use the mechanical energy generated by the locomotive internal combustion engine 21 to generate a first alternating current.

The main rectifying device 23 is configured to rectify the first alternating current generated by the generator 22 into direct current of a first voltage.

The main intermediate direct current circuit 24 is configured to output the direct current of the first voltage to the main transmission system 25 and the auxiliary converter device 26.

The auxiliary converter device 26 is configured to transform a direct current of a first voltage into a direct current of a second voltage, and the second voltage is smaller than the first voltage.

The auxiliary intermediate direct current 27 is used to output the direct current of the second voltage to the auxiliary transmission system 28.

The generator 22 is further configured to stop generating the first AC power when the main drive system 25 fails.

Power battery charging and discharging device 29, for the main drive system 25 failure, according to the electrical energy stored in the power battery 30, to the auxiliary intermediate DC circuit 27 to output a third voltage direct current.

The auxiliary intermediate direct current circuit 27 is also used to output the direct current of the third voltage to the auxiliary transmission system 28.

During normal use of a diesel locomotive, as shown in FIG. 2, the mechanical energy generated by the locomotive internal combustion engine 21 drives the generator 22 to generate a first alternating current. The first alternating current is a three-phase alternating current. The first alternating current is simultaneously the main drive system 25 and the auxiliary The drive train 28 provides power.

Specifically, the first AC power generated by the generator 22 is output to the main rectification device 23, and the main rectification device 23 rectifies the first AC power generated by the generator 22 into DC power, the voltage of the DC power is the first voltage, and the first voltage is The DC power is output to the main intermediate DC circuit 24.

The main intermediate DC circuit 24 is mainly used for shunting, that is, the DC power of the first voltage that is received is output to the main drive system 25 and the auxiliary converter device 26 respectively. The first voltage may be 1800V, 2600V, for example, the specific voltage value and internal combustion Related to locomotive power. Among them, the direct current of the first voltage output to the auxiliary converter 26 finally provides energy for the auxiliary transmission system 8.

Since the voltage of the direct current output from the main intermediate DC circuit 24 to the auxiliary converter 26 (ie, the first voltage) is much larger than the voltage required by the auxiliary drive system 28, the auxiliary intermediate converter 26 is used to convert the main intermediate DC circuit The DC voltage of the first voltage output from 24 is subjected to a step-down process to obtain a DC voltage of the second voltage, and at the same time, the DC voltage of the second voltage is provided to the auxiliary intermediate DC circuit 27, and the second voltage is smaller than the first voltage. The second voltage may be, for example, 600V or 700V, and a specific voltage value is related to an auxiliary system load.

The auxiliary intermediate direct current circuit 27 outputs the received direct current of the second voltage to the auxiliary transmission system 28 to provide electric power to the auxiliary transmission system 28.

When a failure occurs in the main drive system 25 of the diesel locomotive, such as an overcurrent, short circuit, or ground fault in the internal circuit of the main drive system 25, in order to ensure the safety of the locomotive, the generator 22 stops emitting the first AC power. At this time, the diesel locomotive is stopped. In order to avoid the sudden power failure of the auxiliary transmission system 28, the electric energy stored in the power battery 30 is used to provide electric power to the auxiliary transmission system 28. That is, when the power battery 30 is required to provide power, the voltage of the DC power output by the power battery 30 is different from the power consumption voltage required by the auxiliary drive system 28, so the power battery charging and discharging device 29 adjusts the voltage output by the power battery 30 to obtain the first The three-voltage direct current outputs the third voltage direct current to the auxiliary intermediate direct current circuit 27. Among them, since the diesel locomotive is in a fault state at this time, the voltage of the direct-current power supplied to the auxiliary transmission system 28 only needs to satisfy the operation of the auxiliary transmission system 28. Optionally, the magnitude relationship between the third voltage and the second voltage is not limited. For example, the third voltage may be greater than the second voltage, may be equal to the second voltage, or may be smaller than the second voltage.

The auxiliary intermediate direct current circuit 27 outputs the direct current of the third voltage to the auxiliary drive system 28, and the auxiliary drive system 28 receives the direct current of the third voltage, thereby ensuring that the auxiliary drive system 28 can continue to operate when the main drive system 25 fails.

In this embodiment, a power battery charging and discharging device and a power battery are added to the main and auxiliary drive systems of a diesel locomotive. When a failure of the main drive system causes the generator to stop generating power, the power battery is used to provide power to the auxiliary drive system. The power battery charging and discharging device is used to process the voltage of the electrical energy provided by the power battery to the voltage required by the auxiliary transmission system. It solves the problem that the main drive system fails and the auxiliary drive system is also powered off when the generator stops generating power. This ensures that the auxiliary drive system can work normally for a period of time when the main drive system fails, to troubleshoot and recover. The main drivetrain fights for time.

In some embodiments, the auxiliary intermediate direct current circuit 27 is further configured to output the direct current of the second voltage to the power battery charging and discharging device 29.

The power battery charging and discharging device 29 is configured to charge the power battery 30 according to the direct current of the second voltage.

Specifically, during normal use of the diesel locomotive, if the electric energy stored in the power battery 30 is used, the power battery 30 needs to be charged to store the electric energy, so the auxiliary intermediate direct current circuit 27 is used to charge the power battery 30. Since the voltage when the power battery 30 is charged is less than the second voltage, the auxiliary intermediate DC circuit 27 outputs the direct current of the second voltage to the power battery charging and discharging device 29, and the power battery charging and discharging device 29 processes the direct current of the second voltage to be capable of supplying The DC power charged by the power battery 30 completes the charging of the power battery 30.

In this embodiment, the auxiliary intermediate direct current circuit and the power battery charging and discharging device can be used to charge the power battery during the operation of the diesel locomotive, thereby avoiding the problem that the power in the power battery cannot be charged after the power is used up, and the power battery is guaranteed. It can be used cyclically, thereby avoiding the problem of power failure of the auxiliary drive system when the main drive system of the diesel locomotive fails again.

FIG. 3 is a schematic diagram of a main and auxiliary drive system for a diesel locomotive according to another embodiment of the present invention. As shown in FIG. 3, based on the embodiment shown in FIG. 2, the main drive system 25 includes a traction motor 251 and The main inverter 252 is connected between the traction motor 251 and the main intermediate DC circuit 24. It should be noted that the main transmission system 25 is not limited to include a traction motor 251 and a main inverter 252. Optionally, the main transmission system 25 may further include other components, which are not shown in the figure.

The traction motor 251 is configured to generate a second alternating current when the diesel locomotive is braking; when the diesel locomotive is towing, the wheel pair drives the locomotive.

The main inverter 252 is configured to rectify the second AC power into a DC power of a fourth voltage.

The main intermediate direct current circuit 24 is further configured to output the direct current of the fourth voltage to the auxiliary converter device 26.

The auxiliary converter 26 is configured to transform a direct current of a fourth voltage into a direct current of a fifth voltage, where the fifth voltage is smaller than the fourth voltage.

An auxiliary intermediate direct current circuit 27 for outputting direct current of a fifth voltage to an auxiliary transmission system 28;

The auxiliary intermediate direct current circuit 27 is further configured to output direct current of a fifth voltage to the power battery charging and discharging device 29;

The power battery charging and discharging device 29 is configured to charge the power battery 30 according to a direct current of a fifth voltage.

Specifically, when the diesel locomotive is operating normally, the main intermediate direct current circuit 24 outputs the direct current of the first voltage to the main inverter 252 in the main drive system 25. The main inverter 252 first inverts the direct current of the first voltage It becomes an alternating current (three-phase alternating current) and is output to the traction motor 251 so that the traction motor 251 rotates and drives the diesel locomotive to operate.

During the dynamic braking of a diesel locomotive, at this time, the traction motor 251 is in a power generation state, and the kinetic energy of the traction motor 251 is converted into electrical energy to generate a second AC power. The second AC power is a three-phase AC power. The second alternating current is rectified into direct current, and the voltage of the direct current is the fourth voltage, and the direct current of the fourth voltage is output to the main intermediate direct current circuit 24, and the main intermediate direct current circuit 24 can output the direct current of the fourth voltage to the auxiliary converter device. 26. The auxiliary converter device 26 receives the direct current of the fourth voltage, converts the direct current of the fourth voltage to the direct current of the fifth voltage, and outputs the direct current to the auxiliary intermediate direct current circuit 27. The fifth voltage is smaller than the fourth voltage, and may be Alternatively, the fifth voltage is less than the second voltage, or the fifth voltage is equal to the second voltage, or the fifth voltage is greater than the second voltage. The auxiliary intermediate direct current circuit 27 outputs the fifth voltage direct current to the auxiliary transmission system 28. Optionally, the auxiliary intermediate direct current circuit 27 may also output the fifth voltage direct current under the premise of maintaining the power used by the auxiliary transmission system 28. The power battery charging and discharging device 29 charges the power battery 30 through the power battery charging and discharging device 29.

In this embodiment, when the diesel locomotive is dynamically braked, the electric power generated by the traction motor is provided to the auxiliary transmission system, and the power battery is charged through the power battery charging and discharging device, which can save the power generated by the generator. At the same time, the power battery Recovering the electric energy from the traction motor during the dynamic braking of the diesel locomotive has achieved the purpose of energy saving and emission reduction.

FIG. 4 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to another embodiment of the present invention. As shown in FIG. 4, this embodiment is based on the embodiment shown in FIG. 3. The main and auxiliary transmission systems of the diesel locomotive in this embodiment further include: a brake chopper device 31 and a brake resistor 32, and a brake chopper device. 31 is connected between the braking resistor 32 and the main intermediate DC circuit 24.

The main intermediate direct current circuit 24 is further configured to output a direct current of a fourth voltage to the brake chopper device 31.

The brake chopper device 31 is configured to control a current that outputs a direct current of a fourth voltage to the braking resistor 32.

Specifically, during the dynamic braking of the diesel locomotive, the traction motor 251 converts the kinetic energy into electrical energy, and outputs the DC voltage of the fourth voltage to the main intermediate DC circuit 24 through the inverter 252. The main intermediate DC circuit 24 not only outputs the The DC power is output to the auxiliary converter device 26, and the DC power of the fourth voltage is also output to the brake chopper device 31 to be consumed by the braking resistor 32. Among them, in order to first ensure that the auxiliary transmission system 28 and the power battery 30 are charged and used, and then the excess electrical energy is consumed on the braking resistor 32, the brake chopper device 31 can be used to control the main intermediate DC circuit 24 to output to the braking resistor. A fourth voltage on 32 dc. E.g. The state of the brake chopper device 31 can be changed. When the brake chopper device 31 is turned on, the main intermediate DC circuit 24 outputs the direct current of the fourth voltage to the dynamic resistor 32 for consumption; when the brake chopper device 31 is turned off The main intermediate direct current circuit 24 stops outputting the direct current of the fourth voltage to the dynamic resistor 32 for consumption. In this way, the electric energy generated by the traction motor 251 can be reasonably used, and energy saving and environmental protection can be achieved.

FIG. 5 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to another embodiment of the present invention. As shown in FIG. 5, this embodiment is based on the embodiments shown in FIG. 2 to FIG. 4, where FIG. 5 is an example based on FIG. 2. The main and auxiliary drive systems of the diesel locomotive of this embodiment further include: The changeover switch 33 is connected between the power battery charging and discharging device 29 and the main intermediate direct current circuit 24. The power battery charging and discharging device 29 is further configured to output a third voltage direct current to the main intermediate direct current circuit 24 according to the electric energy stored in the power battery 30 when the transfer switch 33 is turned on.

The main intermediate direct current circuit 24 is configured to output a direct current of a third voltage to the main transmission system 25.

Specifically, when the locomotive internal combustion engine 21, the generator 22, the main rectifier 23, and the like on the diesel locomotive fail, which cannot provide electric power to the diesel locomotive, the electric energy stored in the power battery 30 may be used to provide electric power to the main drive system 25. That is, the voltage in the power battery 30 is processed by the power battery charging and discharging device 29 into a direct current of a third voltage, which is not only output to the auxiliary intermediate direct current circuit 27 to provide the direct current of the third voltage to the auxiliary drive system 28, but also the first The three-voltage direct-current power is output to the main intermediate direct-current circuit 24 through the change-over switch 33. The main intermediate direct-current circuit 24 supplies the third-voltage direct current to the main transmission system 25. For example, the main intermediate DC circuit 24 outputs the DC voltage of the third voltage to the main inverter 252, and the main inverter 252 inverts the DC voltage of the third voltage to an AC power, such as a three-phase AC power, and outputs it to the traction motor 251, so that The traction motor 251 tractions a diesel locomotive.

The power stored in the power battery can be used to provide power to the main drive system, so that even if the generator cannot provide power to the main drive system, the diesel locomotive will not stop immediately, so that when the generator cannot provide power to the main drive system Using the electric energy stored in the power battery to make the diesel locomotive run to a safe position, the safety of the diesel locomotive and other vehicles on the track is guaranteed.

On the basis of the above embodiments, in some embodiments, the power battery charging and discharging device 29 is also used to directly stop the locomotive internal combustion engine 21 when the locomotive internal combustion engine 21 is in an idling condition, and the power battery 30 provides the entire locomotive The electric energy of the auxiliary transmission system 28 achieves the purpose of energy saving and emission reduction. Specifically, according to the electrical energy stored in the power battery 30, a third-voltage direct current is output to the auxiliary intermediate direct-current circuit 27, and for the processing procedure after the auxiliary intermediate direct-current circuit 27 receives the third-voltage direct current, refer to the foregoing embodiment. The description is not repeated here. Among them, the idling condition is that the internal combustion engine of the locomotive is idle, and the output power is guaranteed to maintain the minimum speed used by the auxiliary system. The traditional idle setting for the traditional diesel locomotive is mainly for the locomotive to perform traction tasks in time, because it takes a long time for the diesel engine to restart and generate electricity. In addition, some lighting and monitoring equipment on the locomotive are not allowed to power off.

On the basis of the above embodiments, in some embodiments, the power battery 30 is a lithium titanate battery. Since the lithium titanate battery has higher power and density, it is guaranteed that the power battery 30 can store more electric energy, and has the advantages of efficient charging and outputting electric energy.

On the basis of the above embodiments, in some embodiments, the auxiliary converter device 26 includes an isolation transformer. An isolation transformer is used to electrically isolate the main intermediate direct current circuit 24 and the auxiliary intermediate direct current circuit 27.

The auxiliary transformer 26 utilizes the isolation transformer not only to change the voltage of the alternating current, but also to completely isolate the primary and secondary sides of the transformer. Therefore, the isolation transformer in the auxiliary transformer 26 can realize electrical Isolate the main intermediate direct current circuit 24 and the auxiliary intermediate direct current circuit 27.

6 is a schematic diagram of a main and auxiliary transmission system of a diesel locomotive according to another embodiment of the present invention. As shown in FIG. 6, this embodiment is based on the embodiments shown in FIGS. 2 to 5, wherein FIG. 6 is based on the example of FIG. 2. The auxiliary transmission system 28 of this embodiment includes: a control battery 34 It is connected to the control battery charger 35, the control battery charger 35 is connected to the auxiliary intermediate DC circuit 27, and the control battery 34 is connected to the control battery charger 35. It should be noted that the auxiliary transmission system 28 is not limited to include the control battery 34 and the control battery charger 35. Optionally, the auxiliary transmission system 28 may further include other components, which are not shown in the figure.

The power battery charging / discharging device 29 is further configured to output a direct current of a third voltage to the auxiliary intermediate direct current circuit 27 according to the electric energy stored in the power battery 30.

The auxiliary intermediate direct current circuit 27 is also used to output the direct current of the third voltage to the control battery charger 35.

The control battery charger 35 is configured to charge the control battery 34 after adjusting the direct current of the third voltage to the direct current of the sixth voltage according to the voltage of the control battery 34.

Specifically, the auxiliary transmission system 28 is provided with a control battery 34 and a control battery charger 35 for temporarily supplying the locomotive lighting system, the control system and the locomotive lighting system when the generator 22 of the diesel locomotive has not started to operate, that is, the first AC power is not emitted. Microcomputer system and other power supply. When the power battery 30 is provided in the main and auxiliary transmission system of the diesel locomotive, the control battery 34 can be charged by the power battery 30, that is, when the control battery 34 needs to be charged, the voltage of the electric energy output by the power battery 30 is charged by the power battery charging and discharging device 29. It is adjusted to the third voltage, and the direct current of the third voltage is transmitted to the auxiliary intermediate direct current circuit 27. The auxiliary intermediate direct current circuit 27 supplies the direct current of the third voltage to the control battery charger 35 inside the auxiliary transmission system 28, and controls the battery charger. 35 The DC battery of the third voltage is adjusted to the DC voltage of the sixth voltage according to the voltage of the control battery 34, and then the control battery 34 is charged. The sixth voltage is smaller than the third voltage. This method can reduce the capacity of the control battery 34, thereby reducing the volume and cost of the control battery 34.

FIG. 7 is a schematic diagram of a diesel locomotive according to an embodiment of the present invention. As shown in FIG. 7, the diesel locomotive of this embodiment includes a diesel locomotive main and auxiliary transmission system 61, wherein the diesel locomotive main and auxiliary transmission system 61 may adopt the structure of any of the embodiments of FIGS. 2 to 6, and its implementation principles and technical effects Similar, will not repeat them here. Among them, the main and auxiliary transmission systems 61 of the diesel locomotive in FIG. 7 are exemplified on the basis of FIG. 2. It should be noted that the diesel locomotive is not limited to including the diesel locomotive main and auxiliary transmission system 61. Optionally, the diesel locomotive may further include other components, which are not shown in the figure.

In some embodiments, when the diesel locomotive is a passenger locomotive, the diesel locomotive may further include a train power supply system 62, which is used to supply power to the compartment, that is, to the interior lighting equipment, air conditioning system, 220V socket, etc. Provide power. Therefore, in addition to providing electrical power to the main drive system 25 and the auxiliary drive system 28, the generator 22 on the passenger locomotive must also provide power to the train power supply system 62. Specifically, after the auxiliary intermediate direct current circuit 27 receives the direct current of the second voltage, it not only outputs the direct current of the second voltage to the auxiliary transmission system 28, but also outputs the direct current tram of the second voltage to the train power supply system 62 to ensure the train The power supply system 62 can operate normally.

Among them, when the main drive system 25 fails and the generator 22 stops generating the first AC power, the auxiliary intermediate DC circuit 27 receives the third voltage DC power and not only outputs the third voltage DC power to the auxiliary drive system 28, but also The third-voltage DC electric car is output to the train power supply system 62 to ensure the normal operation of the power supply system 62 of the example car, and to avoid the occurrence of a sudden power failure of the entire car due to a failure of the main drive system 25.

Optionally, when the passenger locomotive is dynamically braked, the electric energy generated by the traction motor 251 can also be output to the train power supply system 62, that is, the second AC power generated by the traction motor 251 is processed by the main inverter 252 into a DC voltage of the fourth voltage. Output to the main intermediate direct current circuit 24, the main intermediate direct current circuit 24 outputs the direct current of the fourth voltage to the auxiliary converter 26, and the auxiliary current converter 26 converts the direct current of the fourth voltage to direct current of the fifth voltage and outputs it to The auxiliary intermediate direct current circuit 27, after receiving the direct current of the fifth voltage, the auxiliary intermediate direct current circuit 27 not only outputs the direct current of the fifth voltage to the auxiliary transmission system 28, but also outputs the direct current train of the fifth voltage to the train power supply system 62, In order to reduce the power generated by the generator 22, the purpose of energy saving is achieved.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or to replace some or all of the technical features equivalently; and these modifications or replacements do not depart from the essence of the corresponding technical solutions of the technical solutions of the embodiments of the present invention. range.

Claims (10)

1. A main and auxiliary transmission system of a diesel locomotive, which is characterized by comprising: a locomotive internal combustion engine, a generator, a main rectifier, a main intermediate direct current circuit, a main transmission system, an auxiliary converter, an auxiliary intermediate direct current circuit, an auxiliary transmission system, and a power battery. Charge and discharge device and power battery;

   The locomotive internal combustion engine, generator, main rectifier, and main intermediate DC circuit are connected in sequence, and the main intermediate DC circuit is connected to the main drive system and the auxiliary converter device, and the auxiliary intermediate DC circuit is respectively connected to the auxiliary The power converter is connected to the auxiliary drive system and the power battery charging and discharging device, and the power battery charging and discharging device is connected to the power battery;

   The generator is configured to use the mechanical energy generated by the internal combustion engine of the locomotive to generate a first alternating current;

   The main rectifying device is configured to rectify a first alternating current generated by the generator into a first voltage direct current;

   The main intermediate direct current circuit is configured to output the direct current of the first voltage to the main drive system and the auxiliary converter device;

   The auxiliary converter is configured to transform the direct current of the first voltage into a direct current of a second voltage, and the second voltage is smaller than the first voltage;

   The auxiliary intermediate direct current circuit is configured to output the direct current of the second voltage to the auxiliary transmission system;

   The generator is further configured to stop generating the first AC power when the main drive system fails;

   The power battery charging and discharging device is configured to output a third voltage direct current to the auxiliary intermediate direct current loop according to the electrical energy stored in the power battery when the main drive system fails;

   The auxiliary intermediate direct current circuit is further configured to output the direct current of the third voltage to the auxiliary transmission system.
2. The system according to claim 1, wherein the auxiliary intermediate direct current loop is further configured to output the direct current of the second voltage to the power battery charging and discharging device;

   The power battery charging and discharging device is configured to charge the power battery according to the direct current of the second voltage.
3. The system according to claim 2, wherein the main drive system comprises: a traction motor and a main inverter, the main inverter being connected between the traction motor and the main intermediate DC circuit;

   The traction motor is configured to generate a second alternating current when the diesel locomotive is braking;

   The main inverter is configured to rectify the second alternating current into a direct current of a fourth voltage;

   The main intermediate direct current circuit is further configured to output the direct current of the fourth voltage to the auxiliary converter device;

   The auxiliary converter is configured to transform the direct current of the fourth voltage into a direct current of a fifth voltage, and the fifth voltage is smaller than the fourth voltage;

   The auxiliary intermediate direct current circuit is configured to output the direct current of the fifth voltage to the auxiliary transmission system;

   The auxiliary intermediate DC circuit is further configured to output the fifth-voltage direct current to the power battery charging and discharging device;

   The power battery charging and discharging device is configured to charge the power battery according to the fifth-voltage direct current.
4. The system according to claim 3, further comprising: a braking chopper device and a braking resistor; the braking chopper device is connected between the braking resistor and the main intermediate DC circuit between;

   The main intermediate direct current circuit is further configured to output the direct current of the fourth voltage to the brake chopper device;

   The brake chopper device is configured to control a current outputting the direct current of the fourth voltage to the braking resistor.
5. The system according to claim 1, further comprising: a transfer switch; the transfer switch is connected between the power battery charging and discharging device and the main intermediate direct current circuit;

   The power battery charging and discharging device is further configured to output a third voltage direct current to the main intermediate direct current loop according to the electrical energy stored in the power battery when the transfer switch is turned on;

   The main intermediate direct current circuit is configured to output the direct current of the third voltage to the main drive system.
6. The system according to claim 1, wherein the power battery charging and discharging device is further configured to, when the internal combustion engine of the locomotive is in an idling condition, send direct current to the auxiliary intermediate according to the electrical energy stored in the power battery. The circuit outputs a direct current of a third voltage;

   The power battery charging and discharging device is further configured to stop the diesel engine when the locomotive is on standby for a long time, and output a third voltage direct current to the auxiliary intermediate direct current circuit according to the electric energy stored in the power battery.
7. The system according to any one of claims 1-6, wherein the power battery is a lithium titanate battery.
8. The system according to any one of claims 1-6, wherein the auxiliary converter device comprises an isolation transformer;

   The isolation transformer is used to electrically isolate the main intermediate direct current circuit from the auxiliary intermediate direct current circuit.
9. The system according to any one of claims 1-6, wherein the auxiliary transmission system comprises: a control battery and a control battery charger; the control battery charger is connected to the auxiliary intermediate DC circuit, and A control battery is connected to the control battery charger;

   The power battery charging and discharging device is further configured to output a third voltage direct current to the auxiliary intermediate direct current loop according to the electrical energy stored in the power battery;

   The auxiliary intermediate direct current loop is further configured to output the direct current of the third voltage to the control battery charger;

   The control battery charger is configured to charge the control battery after adjusting the third voltage direct current to a sixth voltage direct current.
10. A diesel locomotive, comprising the main and auxiliary transmission systems of a diesel locomotive according to any one of claims 1-9.

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