Railway passenger vehicle axle end power generation and energy storage device

Abstract

The utility model relates to a kind of railway passenger car vehicle axle end power generation energy storage device, it is characterized by: including railway passenger car vehicle (1), axle end power generation unit (2), energy storage cabinet (3), vehicle power supply (4), electric equipment (5);Railway passenger car vehicle (1) is used to provide power source of power generation device;Axle end power generation unit (2) is installed on every passenger car vehicle bogie wheel set, for in the axle of passenger car vehicle through belt driven power generation device, to generate electric energy;The one end of energy storage cabinet (3) is connected with the axle end power generation unit (2), the other end is connected with the electric equipment (5) of railway passenger car vehicle (1);Vehicle power supply (4) one end is connected with traction locomotive, the other end is connected with energy storage cabinet (3), by energy storage cabinet (3) to provide electric energy to electric equipment (5).It has simple and compact structure, transmission efficiency is high, the wide speed adaptive range, axle end power generation unit of car wheel is light, generator power is big.

Description

Technical Field

[0001] This utility model belongs to the field of railway passenger car technology, and relates to railway passenger car power generation equipment, and in particular to a railway passenger car axle end power generation and energy storage system and method for auxiliary power supply of railway passenger cars. Background Technology

[0002] With the development of railway technology, various intelligent and digital sensors, instruments and electromechanical components are being applied to railway vehicles to achieve intelligent operation and maintenance.

[0003] The existing power supply equipment for railway vehicles is supplied via a 110V DC power line. This 110V DC power is then converted into low-voltage DC and 220V AC to supply other equipment. However, the capacity of the existing power supply method cannot guarantee the supply, while passenger electricity demand continues to increase. This has created a problem of demand exceeding supply for railway vehicle power supply. Summary of the Invention

[0004] The purpose of this invention is to provide a railway passenger car axle-end power generation and energy storage device that can meet the ever-increasing power supply needs of railway vehicles, balance the power structure, and realize the power supply of railway passenger cars.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: It relates to a railway passenger car axle-end power generation and energy storage device, characterized in that: a railway passenger car axle-end power generation and energy storage device includes a railway passenger car, an axle-end power generation unit, an energy storage cabinet, a vehicle power supply, and electrical equipment. Among them, the axle-end power generation unit is installed on the bogie wheelset of each passenger car of the railway passenger car. The axle-end power generation unit is connected to the wheel axle end through the transmission mechanism, and converts the mechanical energy of the wheel axle end rotating when the railway passenger car moves into electrical energy through the energy storage cabinet. The energy storage cabinet includes an energy input terminal, which is electrically connected to the shaft-end power generation unit, and an energy output terminal, which is electrically connected to the electrical equipment. The system controller is electrically connected to the axle-end power generation unit, the energy storage cabinet, and the vehicle power signal, respectively. The vehicle power supply is electrically connected to the tractor and bidirectionally electrically connected to the energy storage cabinet. Electrical equipment includes sockets, lighting equipment, and mobile phone charging ports on passenger vehicles.

[0006] The transmission mechanism is a belt drive mechanism, which includes an axle pulley, a transmission belt, and an automatic tensioner. The automatic tensioner uses a hydraulic or nitrogen-damped tensioner.

[0007] The shaft-end power generation unit is a permanent magnet synchronous generator, and its power output terminal is connected to a bidirectional DC / DC converter.

[0008] The energy storage cabinet includes a battery pack, a battery management unit, and a bidirectional inverter. The battery management unit is electrically connected to the battery pack and is communicatively connected to the system controller.

[0009] The axle-end power generation unit is fixed to the bogie frame by a clamp-type quick-release bracket.

[0010] The shaft-end power generation unit and energy storage cabinet include a liquid cooling system, which is connected to the power devices of the generator and the bidirectional DC / DC converter in the energy storage cabinet for heat dissipation.

[0011] The advantages of this invention are that it can transmit the mechanical energy generated at the wheel axle end of a moving vehicle to the rotor of the axle end power generation unit through belt drive to generate electricity. It can meet the ever-increasing power supply needs of railway vehicles and balance the power structure, thus realizing a railway passenger car axle end power generation and energy storage device for railway passenger cars.

[0012] This utility model features a simple and compact structure, high transmission efficiency, wide speed adaptability, lightweight wheel axle end power generation unit, and large generator power.

[0013] The present invention will be further described below with reference to the accompanying drawings of the embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram: 1. Railway passenger car; 2. Axle-end power generation unit; 3. Energy storage cabinet; 4. Vehicle power supply; 5. Electrical equipment; 6. Vehicle wheelset; 7. Axle pulley; 8. Belt drive mechanism; 9. Wheel axle end. Detailed Implementation

[0016] The following will describe in detail the implementation of this utility model with reference to the accompanying drawings and embodiments, so as to fully understand how this utility model uses technical means to solve technical problems and achieve technical effects and to implement it accordingly.

[0017] like Figure 1 As shown, this utility model relates to a railway passenger car axle-end power generation and energy storage device, characterized by: including a railway passenger car 1, an axle-end power generation unit 2, an energy storage cabinet 3, a vehicle power supply 4, electrical equipment 5, a fault diagnosis and safety isolation unit, and a system controller; the fault diagnosis, safety isolation unit, and system controller are integrated into one structure. In this utility model, the axle-end power generation unit 2, the energy storage cabinet 3, and the vehicle power supply 4 are all concentrated on one passenger car 1, and the axle-end power generation unit 2, the energy storage cabinet 3, and the vehicle power supply 4 are mechanically connected to each other.

[0018] Among them, railway passenger cars 1 are used to provide mechanical power sources; The axle-end power generation unit 2 is installed on the bogie wheelset of each passenger car of the railway passenger car 1. The axle-end power generation unit 2 is fixed to the bogie wheelset by a clamp-type quick-release bracket.

[0019] The axle-end power generation unit 2 is connected to the wheel axle end 9 through a transmission mechanism, and converts the mechanical energy of the wheel axle end 9 rotating when the railway passenger car 1 moves into electrical energy through the energy storage cabinet 3. The transmission mechanism is a belt drive mechanism, which includes an axle pulley 7, a transmission belt 8, and an automatic tensioner. The automatic tensioner uses a hydraulic or nitrogen-damped tensioner to compensate for belt expansion and contraction caused by vibration and acceleration / deceleration during vehicle operation.

[0020] The fault diagnosis and safety isolation unit is used to monitor the tension of the belt drive mechanism, the temperature of the generator, and the insulation resistance of the winding in real time. When any parameter is detected to exceed the safety threshold, the mechanical overload protection clutch is disengaged, and the electrical connection between the shaft end generator unit 2 and the energy storage cabinet 3 is cut off.

[0021] The energy storage cabinet 3 includes an energy input terminal, an energy output terminal, a battery pack, a battery management unit, and a bidirectional inverter. The battery management unit is used to monitor the state of charge, temperature, and health status of the battery pack and communicates with the system controller. Its energy input terminal is electrically connected to the shaft-end power generation unit 2, and its energy output terminal is electrically connected to the electrical equipment 5. The shaft-end power generation unit 2 and the energy storage cabinet 3 share an integrated liquid cooling system, which simultaneously cools the power devices of the generator and the bidirectional DC / DC converter in the energy storage cabinet.

[0022] The axle-end power generation unit 2 is a permanent magnet synchronous generator, and its power output terminal is connected to a bidirectional DC / DC converter. The system controller controls the electromagnetic load torque of the generator by adjusting the power of the bidirectional DC / DC converter, thereby maintaining the stability of the power generation within a wide vehicle speed range. At the same time, the bidirectional DC / DC converter adjusts the load of the generator so that the output power of the system does not fluctuate by more than ±15% of the rated power within the range of vehicle speed from V_min to V_max.

[0023] The system controller is electrically connected to the axle-end power generation unit 2, the energy storage cabinet 3, and the vehicle power supply 4 respectively. The system controller is configured to collect vehicle speed signals and energy storage cabinet charge status signals in real time, and dynamically control the power output and input paths between the axle-end power generation unit 2, the energy storage cabinet 3, and the vehicle power supply 4 to achieve automatic switching of multiple working modes.

[0024] The vehicle power supply 4 is electrically connected to the tractor and is also bidirectionally electrically connected to the energy storage cabinet 3. Electrical equipment 5 includes sockets, lighting equipment, and mobile phone charging ports on passenger vehicles; The working process of this utility model is as follows: (1) Power generation steps: The mechanical energy of the wheel rotation is transmitted to the power generation unit 2 at the axle end through the axle pulley 7 and belt drive 8 to generate electrical energy; (2) Monitoring steps: The system controller collects vehicle speed signals, the charge status signals of energy storage cabinet 3, and the real-time power demand of electrical equipment 5 in real time; The system controller can be a vehicle-mounted dedicated microprocessor or PLC, and its input signals include: Vehicle speed signal from the vehicle bus (such as MVB or CAN); State of charge signal from the battery management unit inside the energy storage cabinet; Power / current sensor signals installed in the circuit of electrical equipment; Safety signals such as tension, temperature, and insulation resistance from the fault diagnosis unit.

[0025] Its output control objects include: The switching drive signal of the bidirectional DC / DC converter at the rear end of the shaft-end power generation unit; Contactors or solid-state relays that connect the energy storage cabinet and the vehicle's power supply; The actuator of the fault isolation unit.

[0026] Mode switching and energy management steps: High-efficiency power generation mode: When the vehicle speed is higher than the first set threshold V1 and the state of charge of the energy storage cabinet is lower than the first capacity threshold S1, the power generated by the control shaft end power generation unit is given priority to power the electrical equipment, and the surplus power is stored in the energy storage cabinet. b. Energy storage power supply mode: When the vehicle speed is lower than the second set threshold V2, the power supply to the electrical equipment is switched to the energy storage cabinet; c. Combined power supply mode: When a sudden increase in the power demand of electrical equipment is detected and the output capacity of the energy storage cabinet is insufficient, the generator unit at the control shaft end and the energy storage cabinet work together to supply power to the electrical equipment. d. Backup power mode: When the state of charge of the energy storage cabinet is lower than the second capacity threshold S2 and the power supply of the axle end generator unit is insufficient, the vehicle power supply is controlled to intervene to provide power.

[0027] Example 2 Example 1 is an axle-end power generation unit 2, which is installed on the bogie wheelset of each passenger car of the railway passenger car 1. Example 2 is designed to facilitate inspection and maintenance during short stops in the train depot. The power generation device is installed with a clamp-type bracket, and the entire device can be removed by loosening only a few bolts, which greatly improves maintainability.

[0028] Example 3 Unlike Example 1, the transmission mechanism in Example 3 is a composite transmission, that is, belt drive is used at low speed to reduce noise, and gear drive is engaged through centrifugal clutch at high speed to ensure efficiency.

[0029] As illustrated by the above embodiments, this utility model enables the generation of electricity by installing pulleys on the wheelsets and axles of a passenger vehicle, which drives the axle-end power generation unit to generate electricity. The electricity generated by the power generation device is stored in an energy storage cabinet, which is then connected to electrical equipment such as sockets, lighting, and mobile phone charging ports on the passenger vehicle.

[0030] This utility model features a simple and compact structure, high transmission efficiency, wide speed adaptability, lightweight generator unit at the wheel axle end, and high generator power. It can effectively solve the problem of insufficient power supply for railway passenger cars and ensure continuous power supply for the equipment and facilities of passenger cars.

Claims

1. A power generation and energy storage device at the axle end of a railway passenger car, characterized in that: It includes railway passenger cars (1), axle-end power generation units (2), energy storage cabinets (3), vehicle power supply (4), and electrical equipment (5); Among them, the axle end power generation unit (2) is installed on the bogie wheelset of each passenger car of the railway passenger car (1). The axle end power generation unit (2) is connected to the wheel axle end (9) through the transmission mechanism. The electrical energy converted from the mechanical energy of the wheel axle end (9) rotating when the railway passenger car (1) moves is stored in the energy storage cabinet (3). The energy storage cabinet (3) includes an energy input terminal, which is electrically connected to the shaft end power generation unit (2), and an energy output terminal is electrically connected to the electrical equipment (5); The system controller is electrically connected to the axle-end power generation unit (2), the energy storage cabinet (3), and the vehicle power supply (4) respectively; The vehicle power supply (4) is electrically connected to the tractor and bidirectionally connected to the energy storage cabinet (3); Electrical equipment (5) includes sockets, lighting equipment and mobile phone charging interfaces on passenger vehicles.

2. The axle-end power generation and energy storage device for railway passenger cars according to claim 1, characterized in that: The transmission mechanism is a belt drive mechanism, which includes an axle pulley (7), a transmission belt (8), and an automatic tensioning pulley. The automatic tensioning pulley uses a hydraulic or nitrogen-damped tensioner.

3. The axle-end power generation and energy storage device for railway passenger cars according to claim 1, characterized in that: The shaft-end power generation unit (2) is a permanent magnet synchronous generator, and its power output terminal is connected to a bidirectional DC / DC converter.

4. The axle-end power generation and energy storage device for railway passenger cars according to claim 1, characterized in that: The energy storage cabinet (3) includes a battery pack, a battery management unit and a bidirectional inverter. The battery management unit is electrically connected to the monitoring battery pack and is communicatively connected to the system controller.

5. The axle-end power generation and energy storage device for railway passenger cars according to claim 1, characterized in that: The axle-end power generation unit (2) is fixed to the bogie frame by a clamp-type quick-release bracket.

6. The axle-end power generation and energy storage device for railway passenger cars according to claim 1, characterized in that: The shaft-end power generation unit (2) and energy storage cabinet (3) include a liquid cooling system, which is connected to the power devices of the generator and the bidirectional DC / DC converter in the energy storage cabinet for heat dissipation.

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