Continuously controllable resistance braking device for electric locomotives

Abstract

This utility model relates to the field of electric locomotive braking technology, and discloses a continuously controllable resistance braking device for electric locomotives. It includes a housing, a braking resistor, a circuit detection component, a main board, and a drive module, which constitute a closed-loop feedback control system. Based on detected voltage and current signals, the drive module precisely adjusts the working state of the braking resistor after analysis by the main board. The device also includes a cooling fan, an air intake grille, and a temperature sensor, forming an active cooling and temperature control system. It also features a quickly detachable cover plate fastening component and an air intake grille. This utility model solves the defects of existing technologies, such as imprecise braking force control and insufficient heat dissipation during continuous operation. Through closed-loop control, it achieves continuous and smooth adjustment of braking force, and through active cooling, it ensures stable high-power operation of the device for extended periods. The device has a complete structure, significantly improving the controllability, safety, and reliability of braking. At the same time, its ingenious structural design greatly facilitates daily inspection and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of electric locomotive braking technology, and in particular to a continuously controllable resistance braking device for electric locomotives. Background Technology

[0002] Electric locomotives, especially when braking heavily on downhill slopes or entering stations, often employ resistor braking technology. This technology converts the regenerative electrical energy of the motor into heat energy by feeding it into a high-power braking resistor, thereby generating braking force. However, existing resistor braking devices are often coarsely controlled, for example, using a stepped switching method of the resistor, resulting in abrupt changes in braking force. This makes it impossible to achieve smooth, continuous, and precise adjustment. This uneven braking not only affects the comfort of the driver and passengers but also makes it difficult to meet the requirements for fine-grained braking force control under complex operating conditions. Furthermore, the essence of resistor braking is the conversion of a large amount of kinetic energy into heat energy, which causes the braking resistor to generate a large amount of heat in a short period of time. Existing braking devices often do not adequately consider this issue, with simple or inefficient heat dissipation structures, leading to heat accumulation. This not only affects the performance and lifespan of the braking resistor itself but, in more serious cases, can force it to reduce braking power or even stop working due to overheating. This makes it impossible to meet the needs of long-term, high-power continuous braking, seriously affecting driving safety.

[0003] Therefore, this utility model proposes a continuously controllable resistance braking device for electric locomotives to overcome the shortcomings of the prior art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a continuously controllable resistance braking device for electric locomotives, which aims to improve the problems of inaccurate braking force control and insufficient heat dissipation capacity during continuous operation in the existing continuously controllable resistance braking devices for electric locomotives, which lead to unstable performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A continuously controllable resistance braking device for electric locomotives includes: a housing, a power module, a braking resistor, a circuit detection component, a main board, and a drive module disposed within the housing; and a cooling fan and an air intake screen disposed on the housing.

[0006] The circuit detection component is connected to both ends of the braking resistor, the main board is electrically connected to the drive module, and the drive module is electrically connected to the braking resistor, forming a closed-loop control circuit for precisely adjusting the braking force.

[0007] Furthermore, the cooling fan and the air intake mesh are spaced apart on the housing. The cooling fan is used to expel the heat generated by the braking resistor from the housing, while external air enters the housing through the air intake mesh, thus forming an active heat dissipation structure to ensure continuous operation.

[0008] Preferably, the circuit detection component includes a voltage sensor and a current sensor.

[0009] Preferably, the device further includes a temperature sensor disposed within the housing, the temperature sensor being electrically connected to the motherboard for monitoring the internal temperature of the device.

[0010] Preferably, the air intake mesh is detachably mounted on the housing via a locking block and a locking slot that mates with the locking block.

[0011] Preferably, the housing has an opening, and the device further includes a cover plate and a fastening assembly for detachably securing the cover plate to the housing to close the opening.

[0012] Preferably, as a further limitation of the aforementioned solution, the fastening assembly includes a knob, a fastening screw coaxially connected to the knob, and a threaded seat fixed within the housing; the cover plate is provided with a threaded hole through which the fastening screw passes, and the fastening screw is threadedly connected to the threaded seat.

[0013] Preferably, the device further includes a power button, a communication module, a communication interface, and a control panel; the power button is connected to the power module; the communication module and the control panel are both electrically connected to the motherboard, and the communication interface is electrically connected to the communication module.

[0014] Preferably, the device further includes a filter connected to the circuitry of the motherboard to improve circuit stability. This utility model has the following beneficial effects: 1. In this utility model, by setting up a circuit detection component, a motherboard and a drive module, a system for closed-loop feedback control of the working state of the braking resistor is constructed, which solves the problems of inaccurate braking force control, slow response and poor adaptability in the prior art, and achieves the technical effect of realizing continuous and precise adjustment of braking force, and significantly improving braking controllability and safety.

[0015] 2. In this utility model, by setting up a cooling fan, an air intake net and a temperature sensor, an active heat dissipation and temperature monitoring system is formed, which solves the problem that the existing braking device will suffer from performance degradation or even damage due to insufficient heat dissipation during continuous operation. It achieves the technical effect of effectively ensuring the stable operation of the device under long-term, high-power conditions and extending the service life of the equipment.

[0016] 3. In this utility model, by using a knob-type fastening component to fix the cover plate and a snap-fit ​​structure to install the air intake screen, the problems of complex structure, difficult internal inspection and maintenance, and inconvenient filter cleaning of the existing device are solved. This achieves the technical effect of quick disassembly and assembly of the cover plate and air intake screen, greatly simplifying the maintenance process and improving the maintainability of the equipment.

[0017] 4. In this utility model, by integrating functional modules such as communication modules, control panels and filters, the problems of existing devices having single functions, low intelligence, and difficulty in integrating into the whole vehicle control system are solved. This achieves the technical effects of improving device integration and system compatibility, providing convenient human-machine interaction and remote communication capabilities, and enhancing circuit stability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the continuously controllable resistance braking device for electric locomotives proposed in this utility model. Figure 2 This is a side view of the continuously controllable resistance braking device for electric locomotives proposed in this utility model; Figure 3 This is a schematic diagram of the fastening screw of the continuously controllable resistance braking device for electric locomotives proposed in this utility model. Figure 4 This is a schematic diagram of the circuit detection component of the continuously controllable resistance braking device for electric locomotives proposed in this utility model. Figure 5 This is a schematic diagram of the braking resistor structure of the continuously controllable resistive braking device for electric locomotives proposed in this utility model; Figure 6 This is a schematic diagram of the air intake network of the continuously controllable resistance braking device for electric locomotives proposed in this utility model. Figure 7 This is a schematic diagram of the structure of the continuously controllable resistance braking device for electric locomotives proposed in this utility model.

[0019] Legend: 1. Housing; 2. Cover plate; 3. Fastening assembly; 301. Knob; 302. Fastening screw; 303. Threaded seat; 304. Screw hole; 4. Circuit detection assembly; 401. Voltage sensor; 402. Current sensor; 5. Braking resistor; 6. Control panel; 7. Main board; 8. Communication module; 9. Drive module; 10. Power module; 11. Filter; 12. Temperature sensor; 13. Cooling fan; 14. Air intake mesh; 15. Power button; 16. Communication interface; 17. Card block; 18. Card slot. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: Please refer to the appendix. Figure 1 - Appendix Figure 7 This utility model provides a continuously controllable resistance braking device for electric locomotives, which aims to solve the problems of inaccurate braking force control, insufficient heat dissipation during continuous operation leading to unstable performance, and inconvenient inspection and maintenance of existing electric locomotive braking devices.

[0022] The continuously controllable resistance braking device for electric locomotives includes a housing 1. Inside the housing 1 are a power module 10, a braking resistor 5, a circuit detection component 4, a main board 7, and a drive module 9. A cooling fan 13 and an air intake mesh 14 are also provided on the housing 1. A power button 15 is provided on the outside of the device. The power button 15 is connected to the power module 10 and is used to control the start and stop of the device. The power module 10 provides operating power for the entire device and is electrically connected to the braking resistor 5, the circuit detection component 4, the main board 7, and the drive module 9. The circuit detection component 4 is connected to both ends of the braking resistor 5 and includes a voltage sensor 401 and a current sensor 402, which are used to detect the voltage and current signals of the braking resistor 5 in real time and transmit the detected voltage and current signals to the main board 7. The main board 7 sends control commands to the drive module 9 based on the received signals. The drive module 9 is electrically connected to the main board 7 and the braking resistor 5. After receiving the control commands, the drive module 9 adjusts the working state of the braking resistor 5 to control the magnitude of the braking force.

[0023] To ensure continuous and stable operation of the device, the heat dissipation and temperature control structure of this embodiment is as follows: The cooling fan 13 is installed at the exhaust port on one side of the housing 1. The heat generated by the braking resistor 5 during operation is forcibly discharged from the housing 1 by the cooling fan 13, forming a negative pressure inside the housing 1. External cold air enters the housing 1 through the air intake net 14 arranged opposite to the exhaust port, and the resulting cooling airflow flows over the surface of the braking resistor 5, thereby achieving efficient heat dissipation. The device also includes a temperature sensor 12 located inside the housing 1 near the braking resistor 5. The temperature sensor 12 is electrically connected to the main board 7 and is used to monitor the temperature inside the housing 1 in real time and feed it back to the main board 7 to achieve overheat protection or fan speed control, etc. To facilitate maintenance and cleaning of the device, the structure of this embodiment is designed as follows: the air intake screen 14 is detachably installed on the housing 1 through a snap-fit ​​engagement between the snap-fit ​​block 17 and the snap-fit ​​groove 18 provided on the housing 1, which facilitates quick cleaning and replacement of the air intake screen 14; the housing 1 is provided with an opening for maintenance, and the device also includes a cover plate 2 for closing the opening and a fastening assembly 3; the fastening assembly 3 is used to detachably fix the cover plate 2 to the housing 1; the fastening assembly 3 includes a knob 301, a fastening screw 302 and a threaded seat 303 fixed in the housing 1; the cover plate 2 is provided with a screw hole 304 for the fastening screw 302 to pass through, and the fastening screw 302 is coaxially fixedly connected to the knob 301. During installation, after the fastening screw 302 passes through the screw hole 304 and aligns with the threaded seat 303, rotating the knob 301 will thread the fastening screw 302 and the threaded seat 303, thereby fastening the cover plate 2. The cover plate 2 can be quickly removed by reversing the operation.

[0024] Based on the above embodiments, the present invention may further include the following preferred technical solutions: In a preferred embodiment, to enable data interaction between the device and external systems and convenient human-machine operation, the device further includes a communication module 8, a communication interface 16, and a control panel 6. Both the communication module 8 and the control panel 6 are electrically connected to the motherboard 7. The motherboard 7 communicates with external systems through the communication module 8, and the communication interface 16 serves as the physical interface for data interaction and is electrically connected to the communication module 8. The control panel 6 may integrate a display unit and an input unit for displaying information such as the device's voltage, current, temperature, and operating status, and for receiving user control commands. As another preferred embodiment, in order to improve the stability and anti-interference capability of the control circuit, the device also includes a filter 11, which is connected to the circuit of the motherboard 7 to filter out interference in the power supply or signal, so as to ensure that the control circuit on the motherboard 7 can operate stably and reliably.

[0025] Working principle: When the device is started via power button 15, power module 10 supplies power to the entire device. When the locomotive brakes, braking resistor 5 starts working, converting the locomotive's kinetic energy into heat energy to achieve braking. During this process, circuit detection component 4 connected to both ends of braking resistor 5 detects voltage and current signals in real time through its internal voltage sensor 401 and current sensor 402, and transmits the signals to main board 7. The control circuit on main board 7 sends control commands to drive module 9 based on the received signals. After receiving the commands, drive module 9 can precisely adjust the working state of braking resistor 5, thereby achieving braking. The braking force can be continuously and controllably adjusted. The heat generated by the braking resistor 5 during operation is forced out of the housing 1 by the cooling fan 13. The negative pressure formed after the hot air is dissipated causes external cold air to enter the housing 1 through the air intake 14, thus forming an effective heat dissipation cycle. The temperature sensor 12 detects the internal temperature of the device in real time and feeds it back to the main board 7, ensuring the stability and safety of the device under continuous operation. Through the synergistic effect of the above closed-loop control system and the active heat dissipation structure, this utility model effectively solves the problems of inaccurate braking force control and insufficient heat dissipation capacity during continuous braking that lead to unstable performance in the prior art.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuously controllable resistance braking device for electric locomotives, comprising: Shell (1); The power module (10), braking resistor (5), circuit detection component (4), motherboard (7) and drive module (9) are disposed in the housing (1). Its features are, The device also includes a cooling fan (13) and an air intake mesh (14) disposed on the housing (1). The circuit detection component (4) is connected to both ends of the braking resistor (5) and is used to detect the voltage and current signals of the braking resistor (5) and send them to the motherboard (7). The motherboard (7) is electrically connected to the drive module (9) and is used to send control commands to the drive module (9) according to the voltage and current signals; The drive module (9) is electrically connected to the braking resistor (5) and is used to adjust the working state of the braking resistor (5) according to the control command. The cooling fan (13) discharges the heat generated by the braking resistor (5) into the housing (1), and external air enters the housing (1) through the air intake net (14).

2. The continuous controllable resistance braking system for electric locomotives according to claim 1, characterized in that: The circuit detection component (4) includes a voltage sensor (401) and a current sensor (402).

3. The continuous controllable resistance braking system for electric locomotives according to claim 1, characterized in that: The device also includes a temperature sensor (12) disposed inside the housing (1), the temperature sensor (12) being electrically connected to the motherboard (7) for detecting the temperature inside the housing (1).

4. The continuous controllable resistance braking system for electric locomotives according to claim 1, characterized in that: The air intake mesh (14) is detachably mounted on the housing (1) via a locking block (17) and a locking groove (18) that cooperates with the locking block (17).

5. The continuous controllable resistance braking system for electric locomotives as set forth in claim 1, wherein: The housing (1) has an opening, and the device further includes a cover plate (2) and a fastening assembly (3) for removably securing the cover plate (2) to the housing (1) to close the opening.

6. The continuously controllable resistance braking arrangement for an electric locomotive as set forth in claim 5, wherein: The fastening assembly (3) includes a knob (301), a fastening screw (302) coaxially connected to the knob (301), and a threaded seat (303) fixed inside the housing (1); the cover plate (2) is provided with a screw hole (304) through which the fastening screw (302) passes, and the fastening screw (302) is threadedly connected to the threaded seat (303).

7. The continuous controllable resistance braking system for electric locomotives as set forth in claim 1, wherein: The device also includes a power button (15), a communication module (8), a communication interface (16), and a control panel (6); the power button (15) is connected to the power module (10) to start the device; the communication module (8) and the control panel (6) are both electrically connected to the motherboard (7), and the communication interface (16) is electrically connected to the communication module (8).

8. The continuous controllable resistance braking system for electric locomotives as set forth in claim 1, wherein: The device also includes a filter (11) connected to the circuit of the motherboard (7) to improve circuit stability.

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