阅读说明：本技术 一种外走廊式内燃机车用牵引变流器 (Traction converter for outer corridor type diesel locomotive ) 是由 孙晓丽 陈宏� 郑旭阳 尚前博 杨玺 朱云鹏 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种外走廊式内燃机车用牵引变流器,包括柜体(1),所述柜体(1)顶部设有顶架(2),所述顶架两侧的侧倾斜框口处安装一级过滤网(7),所述柜体(1)中部设有纵向风道(5),所述纵向风道(5)顶部进风口与顶架(2)底面出风口连通；所述纵向风道(5)两侧面分别沿纵向设有三个开口(9),所述纵向风道(5)底部安装风机(6),所述风机(6)出风口位于柜体(1)底面；所述柜体(1)内位于纵向风道(5)两侧分别对称设有安装架(10),两个安装架(10)采用镜像结构安装内部模块组件。本发明变流器内功率模块采用强迫风冷方式冷却,减少了水冷却方式带来的漏液故障,提高变流器可靠性。(The invention discloses an external corridor type traction converter for an internal combustion locomotive, which comprises a cabinet body (1), wherein the top of the cabinet body (1) is provided with a top frame (2), a primary filter screen (7) is installed at the side-inclined frame openings at two sides of the top frame, the middle of the cabinet body (1) is provided with a longitudinal air duct (5), and an air inlet at the top of the longitudinal air duct (5) is communicated with an air outlet at the bottom surface of the top frame (2); two side surfaces of the longitudinal air duct (5) are respectively provided with three openings (9) along the longitudinal direction, the bottom of the longitudinal air duct (5) is provided with a fan (6), and an air outlet of the fan (6) is positioned on the bottom surface of the cabinet body (1); the novel air conditioner is characterized in that mounting frames (10) are symmetrically arranged on two sides of the longitudinal air duct (5) in the cabinet body (1) respectively, and the two mounting frames (10) are installed with internal module assemblies in a mirror image structure. The power module in the converter is cooled in a forced air cooling mode, so that liquid leakage faults caused by a water cooling mode are reduced, and the reliability of the converter is improved.)

1. The utility model provides an outer corridor formula internal-combustion locomotive is with pulling converter, includes cabinet body (1), its characterized in that: the top of the cabinet body (1) is provided with a top frame (2), primary filter screens (7) are mounted at side-inclined frame openings on two sides of the top frame, a longitudinal air duct (5) is arranged in the middle of the cabinet body (1), and an air inlet in the top of the longitudinal air duct (5) is communicated with an air outlet in the bottom surface of the top frame (2); two side surfaces of the longitudinal air duct (5) are respectively provided with three openings (9) along the longitudinal direction, the bottom of the longitudinal air duct (5) is provided with a fan (6), and an air outlet of the fan (6) is positioned on the bottom surface of the cabinet body (1); mounting frames (10) are symmetrically arranged on two sides of a longitudinal air duct (5) in the cabinet body (1) respectively, the two mounting frames (10) adopt mirror image structures to mount internal module assemblies, and each internal module assembly comprises a copper bar assembly (11), a fuse assembly (12), a grounding detection assembly (13), a low-voltage terminal assembly (14), a control box (15), a low-voltage output terminal assembly (16), an input connector (17), a rectifying power module (18), an inversion power module (19), an inversion + chopping power module (20), an input-output current sensor (21) and a low-voltage input-output connector (22); the heat dissipation plate on the back of the rectification power module (18) extends into the uppermost opening on the side of the longitudinal air duct (5), the heat dissipation plate on the back of the inversion power module (19) extends into the middle opening on the side of the longitudinal air duct (5), and the heat dissipation plate on the back of the inversion + chopping power module (20) extends into the lowermost opening on the side of the longitudinal air duct (5); the cabinet body (1) is symmetrically provided with cabinet doors at two sides.

2. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1, wherein: the longitudinal air duct (5) is made of a 06Cr19N10 stainless steel plate.

3. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1 or 2, wherein: the cabinet body (1) is made of a Q345E steel plate.

4. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1, wherein: and secondary filtering devices are arranged at air inlets in two sides of the top frame (2).

5. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1, wherein: the copper bar assembly (11), the fuse assembly (12), the grounding detection assembly (13), the input connector (17), the rectification power module (18), the inversion power module (19) and the inversion + chopping power module (20) are positioned on the upper portion of the mounting frame (10) and are sealed through the upper cabinet door (3); the low-voltage terminal assembly (14), the control box (15), the low-voltage output terminal assembly (16), the input and output current sensor (21) and the low-voltage input and output connector (22) are positioned at the lower part of the mounting frame (10) and are sealed by the lower cabinet door (4).

6. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1, wherein: the top surface of the top frame (2) is provided with a handle (8).

7. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1, wherein: fuse subassembly (12) comprise two sets of fuses, fix on mounting bracket (10) through the insulator.

8. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1, wherein: the input and output current sensor (21) is integrated with a 3-phase current sensor of the traction motor and is connected with the traction motor through a terminal strip.

9. The traction converter for an outside corridor type internal combustion engine vehicle according to claim 1, wherein: the grounding detection assembly (13) is composed of a grounding resistor, a grounding capacitor and a grounding detection voltage sensor.

Technical Field

The invention relates to the technical field of traction converters, in particular to an external corridor type traction converter for an internal combustion locomotive.

Background

Current traction converter adopts box structural design mode, the box is installed in locomotive machinery room, present interior corridor formula, the converter is installed in the both sides in corridor, the longitudinal dimension of the cabinet body is roughly about 1000mm, cupboard overall arrangement arranges according to the single face, cabinet body qianmen belongs to the maintenance region, the mounted position of detachable component is close to the cabinet door, the wind channel is located cabinet body rear side, the converter air intake is located cabinet body lower part, the fan is installed in cabinet body upper portion, because the fan belongs to bulky heavy part, need have the frock to do appurtenance during the dismantlement, difficult dismantlement in machinery room, partial electrical component can only be installed in cabinet body rear side because space restriction, be unfavorable for workman's installation and dismantlement during electrical components trouble, be unfavorable for the maintenance in later.

Disclosure of Invention

The invention aims to design a traction converter suitable for a 3000-horsepower energy-saving environment-friendly heavy-hybrid shunting locomotive.

The invention is realized by adopting the following technical scheme:

the traction converter for the outside corridor type internal combustion locomotive comprises a cabinet body, wherein the top of the cabinet body is provided with a top frame, primary filter screens are installed at side-inclined frame openings on two sides of the top frame, the middle of the cabinet body is provided with a longitudinal air channel, and an air inlet at the top of the longitudinal air channel is communicated with an air outlet at the bottom surface of the top frame; two side surfaces of the longitudinal air duct are respectively provided with three openings along the longitudinal direction, the bottom of the longitudinal air duct is provided with a fan, and an air outlet of the fan is positioned on the bottom surface of the cabinet body; the cabinet body is internally provided with mounting frames symmetrically arranged on two sides of the longitudinal air duct respectively, the two mounting frames adopt mirror image structures to mount internal module components, and the internal module components comprise copper bar components, fuse components, grounding detection components, low-voltage terminal components, a control box, low-voltage output terminal components, input connectors, rectification power modules, inversion and chopping power modules, input and output current sensors and low-voltage input and output connectors; the heat dissipation plate on the back of the rectification power module extends into the uppermost opening on the side face of the longitudinal air channel, the heat dissipation plate on the back of the inversion power module extends into the middle opening on the side face of the longitudinal air channel, and the heat dissipation plate on the back of the inversion + chopping power module extends into the lowermost opening on the side face of the longitudinal air channel; the cabinet body bilateral symmetry is equipped with the cabinet door.

This forced air cooling pulls converter cabinet body structure is "back to back" mirror image structure, and all electrical components all install in the maintenance region of cabinet body both sides, make things convenient for workman's dismantlement when electrical components trouble. The 3000 horsepower energy-saving environment-friendly remixing hybrid shunting locomotive meets the requirements of a 3000 horsepower energy-saving environment-friendly remixing hybrid shunting locomotive, adopts double power supply of a diesel engine and a battery, has single traction power of 1100kW, adopts an advanced alternating current transmission technology and a Co-Co bogie, and is an upgrading and updating product of a DF5\ DF7 locomotive.

The invention has the following advantages:

1. the installation that can overhaul the space and carry out electrical components in the make full use of cabinet satisfies the not car that falls when converter part trouble and overhauls the design trend.

2. The power module in the converter is cooled in a forced air cooling mode, so that liquid leakage faults caused by a water cooling mode are reduced, and the reliability of the converter is improved.

The invention has reasonable design and good practical application value.

Drawings

Fig. 1 shows a schematic structural outline of a traction converter.

Fig. 2 shows a single-sided explosion diagram of a traction converter.

Fig. 3 shows a schematic view of a cooling system of the traction converter.

Fig. 4 shows a schematic diagram of an inverter module.

Fig. 5 shows a schematic diagram of a rectifier module.

Fig. 6 shows a simplified platform, simplified components and a schematic diagram of component assembly of the converter.

In the figure: the intelligent cabinet comprises a cabinet body 1, a top frame 2, an upper cabinet door 3, a lower cabinet door 4, a longitudinal air duct 5, a fan 6, a primary filter screen 7, a handle 8, an opening 9, a mounting frame 10, a copper bar assembly 11, a fuse assembly 12, a grounding detection assembly 13, a low-voltage terminal assembly 14, a control box 15, a low-voltage output terminal assembly 16, an input connector 17, a rectification power module 18, an inversion power module 19, an inversion and chopping power module 20, an input and output current sensor 21 and a low-voltage input and output connector 22.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

The utility model provides an outer corridor formula is traction converter for diesel locomotive, as shown in figure 1, includes the cabinet body 1, and cabinet body 1 top is equipped with roof-rack 2, and the frame mouth department that inclines that heels of roof-rack both sides installs one-level filter screen 7, and air inlet department installs second grade filter equipment in 2 both sides of roof-rack. Two handles 8 are arranged on the top surface of the top frame 2, so that the carrying is convenient.

As shown in fig. 3, a longitudinal air duct 5 is arranged in the middle of the cabinet body 1, and an air inlet at the top of the longitudinal air duct 5 is communicated with an air outlet at the bottom of the top frame 2; two side surfaces of the longitudinal air duct 5 are respectively provided with three openings 9 along the longitudinal direction, and the three openings are respectively used for placing back heat dissipation plates of the rectification power module, the inversion power module and the inversion + chopping power module; the bottom of the longitudinal air duct 5 is provided with a fan 6, and the air outlet of the fan 6 is positioned on the bottom surface of the cabinet body 1.

The cabinet body 1 is interior to be located 5 both sides of vertical wind channel and is equipped with mounting bracket 10 respectively to the symmetry, two mounting brackets 10 adopt the inside module subassembly of mirror image structure installation, as shown in fig. 2, inside module subassembly includes copper bar subassembly 11, fuse subassembly 12, ground connection detection subassembly 13, low voltage terminal subassembly 14, control box 15, low voltage output terminal subassembly 16, input connector 17, rectification power module 18, contravariant power module 19, contravariant + chopping power module 20, input and output current sensor 21, low voltage input and output connector 22.

The heat dissipation plate on the back of the rectification power module 18 (shown in fig. 5) extends into the uppermost opening on the side of the longitudinal air duct 5, the heat dissipation plate on the back of the inversion power module 19 (shown in fig. 4) extends into the middle opening on the side of the longitudinal air duct 5, and the heat dissipation plate on the back of the inversion + chopping power module 20 extends into the lowermost opening on the side of the longitudinal air duct 5.

The cabinet body 1 is provided with cabinet doors at two sides symmetrically. The copper bar assembly 11, the fuse assembly 12, the grounding detection assembly 13, the input connector 17, the rectification power module 18, the inversion power module 19 and the inversion + chopping power module 20 are positioned on the upper part of the mounting frame 10 and are sealed by the upper cabinet door 3; the low-voltage terminal assembly 14, the control box 15, the low-voltage output terminal assembly 16, the input and output current sensor 21 and the low-voltage input and output connector 22 are positioned at the lower part of the mounting frame 10 and are closed by the lower cabinet door 4.

During specific implementation, a traction converter suitable for a 3000-horsepower energy-saving environment-friendly heavy-hybrid shunting locomotive is designed, and the cabinet body structure mainly adopts the following measures: 1) according to the design requirement, the applicable environment is-40 ℃, and a main frame of a cabinet body of the traction converter is made of a Q345E low-temperature resistant medium-thickness steel plate; 2) considering the working condition of the operating environment of the locomotive, the locomotive can meet the environment with high humidity, high salinity and strong corrosivity when being parked or operated in the rainy and snowy weather, and the main material of the air duct is a 06Cr19N10 stainless steel plate; 3) because the space of the traction converter is small and the number of electrical components mounted inside is large, the cabinet body is mainly structurally distributed from bottom to top and on two sides of the cabinet door; 4) in order to realize reliable grounding of the traction converter under various working conditions, a grounding point is added at a position close to the installation position of an electrical component so as to ensure that the component is reliably grounded.

Fig. 1 is an overall external view of a traction converter, and fig. 2 is a single-side exploded view of the traction converter. A3000-horsepower heavy-duty mixed shunting locomotive traction converter is characterized in that a left mounting frame and a right mounting frame (symmetrical about an air channel) are arranged in a cabinet body, each mounting frame comprises a rectification power module and two inversion power modules (an inversion + chopping power module and an inversion power module), and six traction motors are supplied with power. The traction converter adopts a back-to-back mirror structure, and two power modules share one air duct. The traction converter power module is connected with the peripheral control circuit through the connector, external connecting parts (such as a main circuit wiring terminal, a control connector, an optical fiber connector and the like) are conveniently connected, and the converter module can be conveniently disassembled, assembled and maintained by opening a converter cabinet door. The converter box adopts steel sheet welded structure, and the surface is sprayed paint and is handled, and box airtight area is the sealed design, reduces the interior dust pollution of cabinet.

The functional units are electrically and structurally decomposed into: the device comprises a rectification power module, an inversion power module, a fuse unit, a middle grounding detection unit, an output current sensor unit, a fan cooling unit, a low-voltage control detection unit and a traction control unit.

According to constitutional unit, become "back to back" mirror symmetry structure with electrical components through the wind channel, specifically divide into: the device comprises a copper bar assembly, a fuse assembly, a grounding detection assembly, a low-voltage terminal assembly, a control box, a low-voltage output terminal assembly, an input connector, a rectification power module, an inversion + chopping power module, an input-output current sensor and a low-voltage input-output connector.

The whole product design concept follows a converter simplified platform, component simplification and component assembly from the whole to the component, and the maintainability, safety, reliability, electrical function modularization and structural assembly of the product are considered, as shown in fig. 6.

The fuse assembly mainly comprises two groups of fuses, is fixed on the mounting plate through an insulator, serves as an input loop from the power storage battery to the converter, and also serves as an input loop from the middle direct current loop to the power storage battery, and plays a role in protection when short circuit occurs. The structure has the following characteristics: a) the usability is strong: minimizing units and systematizing; b) the integration level is good: an integral assembly; c) the maintainability is excellent: the whole assembly and disassembly is convenient.

The input and output current sensor integrates a 3-phase current sensor of the traction motor, is connected with the inlet wire of the traction motor through a terminal strip and is used for detecting load current, and when overload or short circuit occurs, protection is triggered; the maintainability is strong, has the characteristics of being convenient for installation, maintenance and repair.

The grounding detection assembly consists of a grounding resistor, a grounding capacitor and a grounding detection voltage sensor, and four grounding faults of direct current positive, direct current negative, input side and output side can be judged by adopting a voltage detection method of 1/2; meanwhile, the voltage detection plate of the bus voltage and the intermediate voltage sensor are concentrated in the assembly, the external high-voltage connection is connected by adopting a copper bar, the external low-voltage connection is connected by adopting a connector, the operation is simple, the maintenance is simple and convenient, and the mounting plate can be integrally detached.

The low-voltage electrical apparatus unit subassembly according to the convenient principle of working a telephone switchboard, divide into two little subassemblies, and analog signal conversion board, terminal row have been integrated to one of them subassembly, and 110V wave filter, terminal row have been integrated to another subassembly, make things convenient for the connection of all low-voltage lines, and the subassembly adopts the connector to connect to the external, can guarantee to work a telephone switchboard correctly and quick connection. The maintenance is simple and convenient, and the mounting plate can be integrally detached.

The top frame adopts secondary filtration, the primary filtering steel wire mesh can filter out large foreign matters such as catkins and the like, the secondary filtering device mainly filters dust, water and the like, the lower part of the secondary filtering device is provided with water leakage holes to prevent the dust and the water from being blocked outside the converter, and meanwhile, external cold air is brought into an air duct of the converter; the first-stage filter screen is fixed on the outer side of the top of the cabinet body by bolts and is convenient to disassemble; the secondary filter device is arranged at the air inlet in the top frame, and can realize the maintenance-free function.

The cooling system unit (air duct) enters air from the side position of the upper part of the converter, and exhausts air from the air outlet at the bottom of the vehicle body through the two-stage filtering unit, the heat dissipation plate of the power module and the fan. The cooling fan can be removed from the front after the high-voltage output terminal row is removed, and the maintenance without falling down is realized.

The power module further reduces the types and the quantity of user spare parts according to the overall layout and the simplified requirements of the converter, six modules installed on the converter are of two types, namely a rectifying module and a traction inversion module, and the power module adopts a dry capacitor (with an explosion-proof design) or a shell-free capacitor and is installed through a guide rail.

When the forced air cooling electric appliance cabinet is used specifically, the high-voltage electric appliance cabinet for the diesel locomotive is arranged on the underframe of the locomotive body, and the forced air cooling electric appliance cabinet is internally provided with components such as a power module, a capacitor, a fan, a low-voltage electric appliance and the like. Can consider the high-low pressure at overall structure and divide the overall arrangement, the great part of weight is arranged in the central point in whole cabinet and is put, and often dismantles the part and can consider to be close to the cabinet door overall arrangement, lets the focus and the coincidence of centroid of the cabinet body as far as possible. The cabinet main frame structure is generally designed by bending and reinforcing the main material such as Q345E, and a stainless steel plate or a Q195 steel plate is used as a local mounting plate, and the plate thickness is selected according to the weight of the electric component mounted thereon.

The internal combustion locomotive is generally designed in an outer corridor mode, the traction converter for the outer corridor type internal combustion locomotive is applied to a 3000-horsepower energy-saving environment-friendly heavy-hybrid shunting locomotive, is a 3000-horsepower hybrid locomotive platform product of the national iron group company, is a platform of future hybrid power, electric-electric shunting, rescue vehicles and tunnel engineering vehicles, can effectively reduce the emission and noise of a diesel engine, and is energy-saving and environment-friendly.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims of the present invention.