CN204993077U - Diesel locomotive assists deflector - Google Patents

Abstract

The utility model discloses an auxiliary converter device for a diesel locomotive, which comprises an auxiliary generator and a cabinet body. The cabinet body is provided with more than one frequency conversion main circuit for supplying power to variable frequency and voltage loads and more than one circuit for supplying power to fixed frequency loads. A fixed-frequency main circuit powered by a constant-voltage load, the variable-frequency main circuit and the fixed-frequency main circuit both include auxiliary converter modules connected in parallel with each other and a direct investment circuit, and the auxiliary generator is converted through the auxiliary converter of the variable-frequency main circuit The module supplies variable frequency power to variable frequency and variable voltage loads or directly supplies power to variable frequency and variable voltage loads through a direct investment circuit; it also includes a trailer generator, and the trailer generator directly supplies constant frequency and constant voltage loads through the direct investment circuit of the fixed frequency main circuit. The power supply or the auxiliary generator provides adaptive power to the constant frequency and constant voltage load through the auxiliary converter module of the fixed frequency main circuit. The auxiliary converter device for internal combustion locomotive of the utility model has the advantages of high reliability, high redundancy, good electromagnetic compatibility and the like.

Description

An auxiliary converter device for a diesel locomotive

technical field

The utility model mainly relates to the technical field of internal combustion locomotives, in particular to an auxiliary flow conversion device for internal combustion locomotives.

Background technique

The auxiliary converter is one of the core components of the AC auxiliary diesel locomotive. It is responsible for power supply management for the auxiliary load system according to the working conditions of the locomotive, and converts the output AC voltage of the auxiliary generator into a three-phase AC voltage with the amplitude and frequency required by the load, including : 1. The diesel engine high-temperature water cooling fan and intercooler cooling fan provide air-cooling and heat dissipation for the diesel engine high-temperature water and intercooler cooling systems respectively. The auxiliary converter must be equipped with a converter module for power supply management, and the auxiliary converter collects data in real time. Diesel engine high-temperature water and intercooler water temperature, adjust the output voltage amplitude and frequency of each module according to the temperature, control the cooling fan speed, keep the cooling water temperature at the best working efficiency point of the diesel engine, and achieve the purpose of energy saving. 2. The air compressor is the key equipment of the locomotive braking system. It is responsible for compressing air into the brake air cylinder of the locomotive to realize the air braking and sand spreading functions of the locomotive. 3. Life loads such as air conditioner units and foot stoves are powered by AC380V/50Hz, which is the same as the air compressor load.

The existing diesel locomotive auxiliary system is generally powered independently by an AC auxiliary generator equipped with the locomotive, and the auxiliary load is directly powered by the generator, or powered by frequency conversion of the auxiliary converter. The diesel engine cooling fan motor needs to be adjusted in real time according to the cooling water temperature to ensure that the diesel engine works at the best efficiency point, so it must be powered by frequency conversion of the auxiliary converter. Different from cooling fan motors, air compressors generally use constant frequency and constant voltage power supply, which can be powered by frequency conversion of auxiliary converters or directly by auxiliary generators. However, since locomotives currently generally use piston or screw air compressors, starting When the current impact is large and the starting is frequent, no matter whether the auxiliary converter is powered by frequency conversion or the auxiliary generator is directly powered, it is easy to cause the auxiliary power supply system to work unstable and reduce the service life of the auxiliary converter.

Utility model content

The technical problem to be solved by the utility model is that: aiming at the technical problems existing in the prior art, the utility model provides an auxiliary flow conversion device for internal combustion trains with high reliability and redundancy.

In order to solve the problems of the technologies described above, the technical solution proposed by the utility model is:

An auxiliary converter device for a diesel locomotive, comprising an auxiliary generator and a cabinet, the cabinet is provided with more than one frequency conversion main circuit for supplying power to variable frequency and voltage loads and more than one circuit for supplying power to constant frequency and constant voltage loads The fixed-frequency main circuit, the frequency-variable main circuit and the fixed-frequency main circuit both include auxiliary converter modules connected in parallel with each other and a direct investment circuit, and the auxiliary generator is supplied to the variable-frequency and voltage-changing module through the auxiliary converter module of the frequency-variable main circuit. Load variable frequency power supply or direct power supply to variable frequency and variable voltage load through direct investment circuit; also includes trailer generator, said trailer generator directly supplies power to constant frequency and constant voltage load through direct investment circuit of said fixed frequency main circuit or said auxiliary The generator provides adaptive power to the constant-frequency and constant-voltage load through the auxiliary converter module of the fixed-frequency main circuit.

As a further improvement of the above technical solution:

The frequency conversion main circuit has two circuits, which are the first frequency conversion main circuit for supplying power to the high-temperature cooling fan motor and the second frequency conversion main circuit for supplying power to the intercooling cooling fan motor.

The fixed-frequency main circuit has a common circuit, which is used to provide power to the air-conditioning unit and the air compressor.

The auxiliary converter module includes a rectification unit, a filter unit and an inverter unit connected in sequence.

The cabinet is provided with a mounting plate, and the mounting plate divides the cabinet into a frequency conversion area for installing a frequency conversion main circuit, a fixed frequency area for installing a fixed frequency main circuit, and an inductive area for installing inductive components , the capacitive area for installing capacitive components and the control area for installing the control unit; the inductive area and the capacitive area are respectively located at the upper and lower parts of the right side of the cabinet, and the frequency conversion area and control area are located at the right side of the cabinet The front part of the side, the fixed frequency area is located at the rear part of the right side of the cabinet.

The opposite sides of the cabinet are respectively provided with a first cabinet door and a second cabinet door, the first cabinet door corresponds to the frequency conversion area and the control area, and the second cabinet door corresponds to the fixed frequency area.

A heat dissipation component is arranged above the fixed frequency area.

Compared with the prior art, the utility model has the advantages of:

The auxiliary converter device for diesel locomotive of the utility model supplies power for different types of loads by different generators, which can avoid the influence of different loads on the power supply system. Each main circuit is equipped with a direct investment circuit. The load can be automatically switched to be directly powered by each generator, which improves the redundancy and stability of the system. Among them, the water temperature cooling fan motor of the diesel engine is powered by the auxiliary generator, and the life load of the air compressor and the air conditioner unit is powered by the trailer generator, which can avoid the current impact of the air compressor on the auxiliary generator due to repeated sudden injection, and ensure that the locomotive is operated in a marshalling or a single machine The continuous operation of the air brake system and domestic electricity under the condition improves the redundancy and reliability of the auxiliary power supply system. The control system, the main circuit, and the transformer are separated into independent chambers, and the modular design is adopted. Each sub-component is separated into an isolated airtight chamber according to their respective functions and voltage levels, so as to improve the electromagnetic compatibility performance and stability of the system; the front and back sides of the cabinet are maintained , to ensure that all components can be easily maintained and disassembled.

Description of drawings

Fig. 1 is the circuit schematic diagram of the utility model.

Fig. 2 is a schematic circuit diagram of the auxiliary converter module in the utility model.

Fig. 3 is a schematic diagram of the front structure of the cabinet in the present invention.

Fig. 4 is a schematic rear view structure diagram of the cabinet in the present invention.

Fig. 5 is a working flow chart of the air compressor in the utility model.

The symbols in the figure indicate: 1. auxiliary generator; , cooling components; 4, frequency conversion main circuit; 41, the first frequency conversion main circuit; 42, the second frequency conversion main circuit; 5, fixed frequency main circuit; 6, auxiliary converter module; 7, direct investment circuit.

detailed description

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments of the description.

As shown in Figures 1 to 5, the auxiliary converter device for diesel locomotives in this embodiment includes an auxiliary generator 1 and a cabinet 3, and more than one frequency conversion main circuit for supplying power to variable frequency and voltage loads is arranged in the cabinet 3 4 and more than one fixed-frequency main circuit 5 for supplying power to constant-frequency and constant-voltage loads. Both the variable-frequency main circuit 4 and the fixed-frequency main circuit 5 include auxiliary converter modules connected in parallel and direct investment circuits 7, and auxiliary generators 1 The auxiliary converter module 6 of the frequency conversion main circuit 4 supplies variable frequency power to the variable frequency variable voltage load or directly supplies power to the variable frequency variable voltage load through the direct investment circuit 7; The direct investment circuit 7 directly supplies power to the constant-frequency and constant-voltage load, or the auxiliary generator 1 provides adaptive power to the constant-frequency and constant-voltage load through the auxiliary converter module 6 of the constant-frequency main circuit 5 . The trailer generator 2 in this embodiment can be a high-power generator set configured in the trailer compartment of a diesel motor vehicle, which is designed to provide AC400V/50Hz and single-phase AC220V/50Hz domestic electricity for passenger cars. The auxiliary converter device for diesel locomotive of the utility model supplies power for different types of loads by different generators, which can avoid the influence of different loads on the power supply system. Each main circuit is equipped with a direct investment circuit 7 and an auxiliary converter module 6 In case of failure, the load can be automatically switched to be directly powered by each generator, which improves the redundancy and stability of the system.

As shown in Figure 1, in this embodiment, the frequency conversion main circuit 4 has two circuits, which are respectively the first frequency conversion main circuit 41 for providing power to the high-temperature cooling fan motor and the first frequency conversion main circuit 41 for providing power to the intercooling cooling fan motor. Second frequency conversion main circuit 42 . The fixed-frequency main circuit 5 has one circuit in total, which is used to provide power to the air-conditioning unit and the air compressor. The first frequency conversion main circuit 41 and the second frequency conversion main circuit 42 respectively provide frequency conversion power supply for the high-temperature water cooling fan motor and the intermediate cooling cooling fan motor. The rated AC400Vrms/120Hz three-phase voltage issued by the locomotive auxiliary generator 1 passes through the contactor and the fuse. , After the reactor is input, it is sent to the auxiliary converter module 6 (AC1, AC2), and the auxiliary converter module 6 rectifies, filters and inverts the input three-phase voltage, and converts it into a rated AC400Vrms/120Hz three-phase PWM voltage output , using variable frequency voltage control. When the frequency conversion power supply circuit fails, the system can automatically switch the two cooling fan motors to be directly powered by the locomotive auxiliary generator 1 through the direct investment circuit 7 . As shown in Figure 5, the fixed-frequency main circuit 5 provides power for constant-frequency and constant-voltage loads such as air compressors and air-conditioning units. Under normal circumstances, the motor vehicle trailer generator 2 provides a three-phase four-wire AC400Vrms/50Hz sinusoidal voltage power supply. When the trailer generator 2 fails or the locomotive works alone, the rated AC400Vrms/120Hz three-phase voltage generated by the locomotive auxiliary generator 1 is sent to the auxiliary converter module 6 (AC3) after passing through the contactor, fuse and input reactor. The auxiliary converter module 6 converts the input three-phase voltage into a rated AC160Vrms/50Hz three-phase PWM voltage output after rectification, filtering, and inversion, and then is filtered by a three-phase filter and boosted by a three-phase isolation transformer to achieve a constant output Sine wave 380V/50HZ power supply. Due to the high power of trailer generator 2, reaching 400kVA, it is less affected by the sudden operation of the air compressor, which ensures the stability and reliability of the auxiliary power supply system of the locomotive.

As shown in FIG. 2 , in this embodiment, the auxiliary converter module 6 includes a rectification unit, a filter unit and an inverter unit connected in sequence.

As shown in Figure 3 and Figure 4, in this embodiment, the cabinet body 3 is provided with a mounting plate, and the mounting plate divides the cabinet body 3 into a frequency conversion area 31 for installing the frequency conversion main circuit 4, and a frequency conversion area 31 for installing the fixed frequency main circuit 4. 5 fixed frequency area 32, the inductive area 33 for installing inductive elements, the capacitive area 34 for installing capacitive elements, and the control area 35 for installing control units; the inductive area 33 and the capacitive area 34 are respectively located in the cabinet The upper and lower parts of the right side of the body 3, the frequency conversion area 31 and the control area 35 are located at the front part of the right side of the cabinet body 3, and the fixed frequency area 32 is located at the rear part of the right side of the cabinet body 3. The auxiliary converter is divided into different sealed cavities according to the functions of each sub-component to ensure the physical isolation of strong and weak current circuits, main circuits and control systems, power inductive devices and interference-prone semiconductor devices, and improve the electromagnetic compatibility performance of the system. The system adopts forced air cooling design, and each inverter module is equipped with independent air duct and cooling fan, which improves the working efficiency and stability of each module.

In this embodiment, a first cabinet door and a second cabinet door are respectively provided on opposite sides of the cabinet body 3 , the first cabinet door corresponds to the variable frequency zone 31 and the control zone 35 , and the second cabinet door corresponds to the constant frequency zone 32 . The front and back sides of the cabinet body 3 are maintained to ensure that all devices can be easily maintained and disassembled.

In this embodiment, a heat dissipation assembly 36 is disposed above the fixed frequency area 32, and the heat dissipation assembly 36 is a heat dissipation fan.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the utility model, or modify it into an equivalent change, etc. effective example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical proposal of the present invention.

Claims (7)

1. a diesel locomotive auxiliary converter device, comprise auxiliary generator (1) and cabinet (3), it is characterized in that, be provided with in described cabinet (3) a more than road for more than the frequency conversion main circuit (4) and a road of variable-frequency variable-voltage load supplying for determining frequency main circuit (5) to what determine frequency level pressure load supplying, described frequency conversion main circuit (4) and fixed main circuit (5) frequently include auxiliary current transformer module (6) parallel with one another and deliver directly circuit (7), described auxiliary generator (1) is directly powered to variable-frequency variable-voltage load to variable-frequency variable-voltage load conversion power supply or through delivering directly circuit (7) through the auxiliary converter module (6) of described frequency conversion main circuit (4), also comprise trailer generator (2), described trailer generator (2) directly to be powered or described auxiliary generator (1) provides power adapter through the auxiliary converter module (6) of described fixed main circuit (5) frequently to determining the load of frequency level pressure to determining the load of frequency level pressure through the circuit (7) of delivering directly of described fixed main circuit (5) frequently.

2. diesel locomotive auxiliary converter device according to claim 1, it is characterized in that, described frequency conversion main circuit (4) has two-way, be respectively the first frequency conversion main circuit (41) for powering to High-temperature cooling fan electromotor and in the cold cooling fan motor second frequency conversion main circuit (42) of powering.

3. diesel locomotive auxiliary converter device according to claim 2, is characterized in that, described fixed main circuit (5) totally one tunnel frequently, for providing power supply to air-conditioner set and air compressor.

4. diesel locomotive auxiliary converter device according to claim 3, is characterized in that, described auxiliary converter module (6) comprises rectification unit, filter unit and the inversion unit that order is connected.

5. diesel locomotive auxiliary converter device as claimed in any of claims 1 to 3, it is characterized in that, described cabinet is provided with mounting panel in (3), described mounting panel described cabinet (3) is divided into the frequency conversion district (31) for installing frequency conversion main circuit (4), for install determine frequency main circuit (5) Ding Pin district (32), for install inductive element perceptual district (33), for installing the capacitive district (34) of capacitive element and the controlled area (35) for installing control unit; Described perceptual district (33) and capacitive district (34) lay respectively at the top and the bottom on cabinet (3) right side, and described frequency conversion district (31) and controlled area (35) are positioned at the front portion on cabinet (3) right side, and described Ding Pin district (32) is positioned at the rear portion on described cabinet (3) right side.

6. diesel locomotive auxiliary converter device according to claim 5, it is characterized in that, the relative both sides of described cabinet (3) offer the first cabinet door and the second cabinet door respectively, the corresponding described frequency conversion district (31) of described first cabinet door and controlled area (35), the corresponding described Ding Pin district (32) of described second cabinet door.

7. diesel locomotive auxiliary converter device according to claim 6, is characterized in that, the top of described Ding Pin district (32) is provided with radiating subassembly (36).