Motor train unit air duct structure suitable for traction motor cooling fan double air supply channels and motor train unit train

Abstract

The invention provides a motor train unit air duct structure suitable for traction motor cooling fan double air supply channels and a motor train unit train, and the motor train unit air duct structure comprises an air duct front end structure, an air duct middle section bar reinforcing structure, an air duct tail coaming assembly, a connector inspection door cover plate and an internal coaming, a partition wall of the equipment compartment is provided with a soft air duct air inlet of a double-impeller traction motor cooling fan, and a steel wire thread sleeve is pre-embedded on the periphery of the air inlet to be connected with a soft air duct. An existing air duct structure can only meet the requirement for installation of a single-impeller type traction motor cooling fan, the air duct structure is not suitable for a motor train unit adopting a double-impeller type traction motor cooling fan for running under the condition of a long and large ramp line, and the design of the novel air duct supplements a key technology for a train body platform structure of the motor train unit. According to the connector built-in scheme integrated with the fresh air duct structure, the water inlet fault of the connector is reduced, and the maintenance cost is saved.

Description

Technical Field

[0001] This invention relates to the field of train body structure, and more particularly to a train air duct structure suitable for dual air supply channels of traction motor cooling fans. Background Technology

[0002] The existing CR400BF series EMU traction motor cooling fans are all single-impeller type, and the car body air duct structure meets the 43.2m requirement. 3 The ventilation volume requirement is 57 m³ / min, and the electrical connector mounting bracket is located on the side wing of the air duct above the bogie, frequently resulting in water ingress into the connector. The Sichuan-Tibet EMU line operates on special road conditions with high altitude and long, 30‰ gradients. To meet the train's traction speed requirements and address the connector water ingress issue, the traction motor cooling fan of the Sichuan-Tibet EMU is designed with a double-impeller structure (ventilation volume not less than 57 m³ / min). 3 Furthermore, the electrical connectors need to be concealed and installed inside the air duct, and the existing air duct structure of the CR400BF EMU cannot meet the above functional requirements. Summary of the Invention

[0003] The purpose of this invention is to design a functionally integrated vehicle body air duct structure that can meet the installation requirements of a dual-impeller traction motor cooling fan, the requirement of concealed electrical connectors, and the requirement of uniform internal flow field distribution.

[0004] To achieve the above objectives, this invention provides a train set air duct structure suitable for dual air supply channels of traction motor cooling fans. The structure includes a front end structure, a middle profile reinforcement structure, a rear end panel, a connector inspection door cover, and an internal panel. The equipment compartment partition wall is equipped with a flexible air duct inlet for the dual-impeller traction motor cooling fan. Steel wire threaded sleeves are pre-embedded around the inlet to connect the flexible air duct. The front end structure includes a front end base plate and a front end side profile plate. The front end base plate is located at the connection point between the front end structure and the equipment compartment partition wall, in the area between the two air inlets of the traction motor cooling fan. The front end side profile plate is provided on the front end side of the duct. The internal space formed by the front end base plate, the front end side profile plate, and the equipment compartment partition wall is welded with a panel and a connector inspection door cover, providing installation space for the connector to be concealed within the space.

[0005] Furthermore, the front air outlet and the bottom plate inspection door opening are provided on the front end bottom plate of the air duct, and a U-shaped notch is opened at the connection between the front end bottom plate of the air duct and the partition wall of the equipment compartment.

[0006] Furthermore, the bottom of the irregularly shaped plate at the front end of the air duct is provided with a flange, and the overall cross-section is sloping, which is welded and fixed to the bottom plate at the front end of the air duct, the partition wall of the equipment compartment, and the floor.

[0007] Furthermore, a tail air outlet is provided on the tail end panel of the air duct.

[0008] Furthermore, the traction motor cooling fan is connected to the equipment compartment partition wall via a wire thread sleeve.

[0009] Furthermore, a guide plate is installed inside the front air outlet of the front air outlet of the air duct front end plate. Cooling air along the gap between the guide plate and the front air outlet of the air duct is discharged from the front air outlet and supplied to the traction motor above the bogie.

[0010] The present invention also provides a high-speed train that uses the air duct structure described above.

[0011] The existing air duct structure can only meet the installation of single-impeller traction motor cooling fans. It is no longer suitable for EMUs that use double-impeller traction motor cooling fans when operating on long and steep tracks. The design of the new air duct adds a key technology to the EMU body platform structure. The connector concealment solution integrated into the new air duct structure reduces connector water ingress failure and saves maintenance costs. Attached Figure Description

[0012] Figure 1 This is a bottom view of the main structure of the air duct;

[0013] Figure 2 for Figure 1 Sectional view of “AA”;

[0014] Figure 3 This is a longitudinal sectional view of the main structure of the air duct;

[0015] Figure 4 Axonometric drawing of the air duct structure;

[0016] Figure 5 Axonometric drawing of the double air duct openings at the front end of the air duct;

[0017] Figure 6 Diagram showing the interface between the dual air duct openings at the front end of the air duct and the traction motor / ventilator.

[0018] Figure 7 for Figure 6 BB sectional view;

[0019] Figure 8 Diagram showing the placement of the connector at the front end of the air duct;

[0020] Figure 9 for Figure 8 The "CC" sectional view;

[0021] Figure 10 This is a schematic diagram of the air duct structure and floor installation structure.

[0022] Figure 11 for Figure 10 A cross-sectional view of “DD”;

[0023] Figure 12 This is an exploded view of the air duct structure.

[0024] In the diagram: 1-Reinforced structure of the middle section of the air duct; 2-Bottom plate of the front end of the air duct; 3-Irregularly shaped plate of the front end of the air duct; 4-Connector inspection door cover; 5-Composition of the rear end enclosure of the air duct; 6-Front end air outlet; 7-Tail end air outlet; 8-Bottom plate inspection door opening; 9-Internal guide plate; 10-Internal enclosure; 11-First air inlet; 12-Second air inlet; 13-Wire threaded sleeve; 14-Equipment compartment partition wall; 15-Dual impeller traction motor cooling fan; 16-Front end structure of the air duct; 17-Connector joint; 18-Electrical connector; 19-Floor cavity. Detailed Implementation

[0025] This invention mainly includes a front end structure 16 of the air duct, a middle profile reinforcement structure 1 of the air duct, a connector inspection door cover plate 4, a rear end enclosure 5 of the air duct, a front end air outlet 6, a rear end air outlet 7, a bottom plate inspection door opening 8, an internal guide plate 9, an internal enclosure 10, a first air inlet 11, a second air inlet 12, and a wire threaded sleeve 13 for connecting the flexible air duct of the dual impeller traction motor cooling fan 15. The equipment compartment partition wall 14, connected to the front end structure 16 of the air duct, is provided with the first air inlet 11 and the second air inlet 12 of the dual impeller traction motor cooling fan 15. Wire threaded sleeves 13 are pre-embedded around the first air inlet 11 and the second air inlet 12 for connection. The air duct is connected to a flexible air duct. The front end structure 16 of the air duct includes a front end base plate 2 and a front end side irregular plate 3. The front end base plate 2 is located at the connection position between the front end structure 16 of the air duct and the equipment compartment partition wall 14 and in the area between the two air inlets of the traction motor cooling fan 15. The front end side irregular plate 3 of the air duct is set to achieve circumferential welding of the air inlet of the equipment compartment partition wall. The bottom of the front end side irregular plate 3 of the air duct is provided with a flange, and the cross section is generally sloping. It is welded and fixed to the front end base plate 2 of the air duct, the equipment compartment partition wall 14 and the floor. Considering that a certain safety gap needs to be left between the wheel flange and the air duct when the bogie is at its limit swing angle under the train operation state.

[0026] The front air outlet 6, the rear air outlet 7, and the bottom plate inspection door opening 8 are machined openings on the components (to meet the functional requirements of air supply and maintenance); the first air inlet 11, the second air inlet 12, and the wire thread sleeve 13 for connecting the flexible air duct of the double impeller traction motor cooling fan 15 are located on the equipment compartment partition wall 14. The first air inlet 11 and the second air inlet 12 are machined openings on the components. The wire thread sleeve 13 is screwed into the equipment compartment partition wall 14 by tapping to connect the double impeller traction motor cooling fan 15. All the main components of the air duct are connected by welding to form an overall structure with an internally closed air supply channel.

[0027] When the dual-impeller traction motor cooling fan 15 is working, cooling air enters the front end of the air duct from the first air inlet 11 and the second air inlet 12. The air duct is equipped with an internal guide plate 9 to achieve uniform flow distribution within the internal flow field.

[0028] After being divided by the internal baffle plate, three airflow paths are formed:

[0029] Path 1: Cooling air along the gap between the guide plate 9 and the front end plate 2 of the air duct is discharged from the front air outlet 6 and supplied to the traction motor above the bogie shaft 2 (shaft 3);

[0030] Path 2: The cooling air along the gap between the profile reinforcement structure 1 in the middle of the air duct and the floor is discharged from the tail air outlet 7 and supplied to the traction motor above the bogie shaft 1 (shaft 4);

[0031] Path 3: Cooling air along the floor cavity path is discharged from the rear air outlet 7 and supplied to the traction motor above the bogie shaft 1 (shaft 4).

[0032] Electrical connector 18 is installed inside the front-end air duct structure 16. It forms a closed space independent of the internal flow field of the air duct by welding around the connection of the air duct front-end base plate 2, the internal enclosure plate 10 and the equipment compartment partition wall 14. In order to ensure the daily maintenance and repair needs of the connector, a connector inspection door cover plate 4 is set at the bottom.

Claims

1. A cooling duct structure for a high-speed train with dual air supply channels for traction motor cooling fans, characterized in that, The system includes a front-end structure for the air duct, a middle section reinforced with profiles, a rear section enclosure, a connector inspection door cover, and an internal enclosure. The equipment compartment partition wall is equipped with a flexible air duct inlet for a dual-impeller traction motor cooling fan. Steel wire threaded sleeves are pre-embedded around the inlet for connecting the flexible air duct. The front-end structure includes a front-end base plate and a front-end side profile plate. The front-end base plate is located where the front-end structure connects to the equipment compartment partition wall, between the two air inlets of the traction motor cooling fan. The front-end side profile plate is located on the front-end side of the air duct. The internal space formed by the front-end base plate, the front-end side profile plate, and the equipment compartment partition wall is welded with enclosures and a connector inspection door cover, providing installation space for the connector to be concealed within the enclosure.

2. The air duct structure for a high-speed train with a dual air supply channel for the traction motor cooling fan, as described in claim 1, is characterized in that... The front air outlet and the bottom plate inspection door are provided on the front end base plate of the air duct, and a U-shaped notch is opened at the connection between the front end base plate of the air duct and the partition wall of the equipment compartment.

3. The air duct structure for a high-speed train with a dual air supply channel for the traction motor cooling fan, as described in claim 1, is characterized in that... The tail end panel of the air duct is provided with a tail air outlet.

4. The air duct structure for a high-speed train with dual air supply channels for traction motor cooling fans as described in claim 1, characterized in that, The bottom of the irregularly shaped plate at the front end of the air duct is provided with a flange, and the overall cross-section is sloping. It is welded and fixed to the bottom plate at the front end of the air duct, the partition wall of the equipment compartment, and the floor.

5. The air duct structure for a high-speed train with a dual air supply channel for the traction motor cooling fan, as described in claim 1, is characterized in that... The traction motor cooling fan is connected to the equipment compartment partition wall via a wire threaded sleeve.

6. The air duct structure for a high-speed train with a dual air supply channel for the traction motor cooling fan, as described in claim 1, is characterized in that... A guide plate is installed inside the front air outlet of the front air outlet of the air duct base plate. Cooling air along the gap between the guide plate and the front air outlet is discharged from the front air outlet and supplied to the traction motor above the bogie.

7. A type of high-speed train, characterized in that, The air duct structure as described in any one of claims 1 to 6 is applied.

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