A box body suitable for a power unit converter of a motor train unit

Abstract

The application discloses a box body of a power unit converter suitable for a motor train unit, the box body is in a rectangular body shape and is installed below a motor train unit body, the box body comprises a top frame and a bottom plate which are horizontally and vertically arranged, and the length direction of the bottom plate is fixed with a first side plate and a second side plate which are vertically arranged. An intermediate partition plate is fixed between the first side plate and the second side plate along the width direction of the bottom plate, the first chamber is formed between the intermediate partition plate and the first side plate, and the dirty chamber is formed between the intermediate partition plate and the second side plate. The material of the bottom plate, the top frame, the first side plate, the second side plate and the intermediate partition plate is aluminum alloy, and the bottom plate, the first side plate, the second side plate and the intermediate partition plate are all composed of profiled plates. The box body can reduce the weight of the box body while ensuring the strength to meet the light weight requirement of the motor train unit, can facilitate the assembly of the power unit converter to reduce the assembly difficulty, and has a compact structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of converter box, and particularly relates to a box for power unit converter of motor train unit. BACKGROUND

[0002] The power unit converter is an important large-mass electrical component of high-speed motor train unit, and integrates all functions of traction converter, auxiliary converter and cooling unit, and the weight of the power unit converter is between 3t and 4.5t. The power unit converter is installed in a hanging mode under the train, and the working condition of the power unit converter is relatively harsh, and the power unit converter is vibrated by external excitation and self excitation, so that the running safety and reliability of the power unit converter are required to be very high.

[0003] As the power unit converter providing traction power, the box of the power unit converter mainly has the following functions: 1. ensuring that the power unit converter can be safely and reliably hung under the train body; 2. having sufficient strength to provide a reliable mounting support structure for electrical components of the power unit converter; 3. having sufficient rigidity to enable the electrical components of the power unit converter to work in a suitable vibration environment, and 4. having sufficient corrosion resistance and sealing to ensure that the electrical components of the power unit converter can work in a relatively closed environment and are not affected by the outside.

[0004] The material of the existing power unit converter box is mainly steel, and the box is mainly processed by welding or riveting. For the large-mass power unit converter of high-speed motor train unit, the box is generally a steel welded box.

[0005] The power unit converter box mainly installs transformers, resonant reactors, traction and auxiliary power modules, resonant and supporting capacitors, cooling systems, incoming and outgoing line devices and other electrical and mechanical structural components. The transformers, resonant reactors, traction and auxiliary power modules and other components are large-mass devices, and the mounting structure needs to have sufficient reliability. The cooling system provides cooling for the electrical components with high heat generation, and the cooling mode can be divided into running air cooling, forced air cooling and water cooling.

[0006] The existing power unit converter has the following deficiencies: 1. the weight of the power unit box is large, and the light weight requirement of the existing high-speed motor train unit cannot be met; 2. the power unit box structure is not compact; and 3. the power unit converter is difficult to assemble.

[0007] Therefore, the present application is proposed by the present inventor on the basis of years of experience and practice in the relevant industry, so as to overcome the defects of the prior art. SUMMARY

[0008] The application aims to provide a box body of a power unit converter of a motor train unit, which can reduce the weight of the box body while ensuring the strength to meet the lightening requirement of the motor train unit, facilitate the assembly of the power unit converter to reduce the assembly difficulty, and has a compact structure.

[0009] The application aims to provide a box body of a power unit converter of a motor train unit, which can reduce the weight of the box body while ensuring the strength to meet the lightening requirement of the motor train unit, facilitate the assembly of the power unit converter to reduce the assembly difficulty, and has a compact structure.

[0010] The first side plate and the second side plate are fixed with an intermediate partition plate along the width direction of the bottom plate, the top of the first side plate, the second side plate and the intermediate partition plate is fixedly connected to the top frame, the first clean room is formed between the intermediate partition plate and the first side plate, and the dirty room is formed between the intermediate partition plate and the second side plate, and at least a first chamber and a second chamber are sequentially arranged side by side along the width direction of the bottom plate in the first clean room; the material of the bottom plate, the top frame, the first side plate, the second side plate and the intermediate partition plate is aluminum alloy, the bottom plate, the first side plate, the second side plate and the intermediate partition plate are composed of a profiled plate, and the profiled plate is formed with a mounting structure for mounting electrical components.

[0011] In a preferred embodiment of the application, the profiled plate is formed with at least one structure cavity and at least one mounting cavity, the structure cavity and the mounting cavity extend through the profiled plate along the length direction of the profiled plate, and the structure cavity and the mounting cavity are arranged independently along the width direction of the profiled plate; the top of the mounting cavity is provided with at least one mounting hole penetrating through the upper surface of the profiled plate, and the upper surface of the profiled plate is provided with at least one wire lashing support frame, and the mounting cavity, the mounting hole and the wire lashing support frame form the mounting structure on the profiled plate.

[0012] In a preferred embodiment of the application, the top frame includes two longitudinal beams arranged in parallel and spaced apart, and a plurality of first cross beams, a plurality of second cross beams and a third cross beam fixed between the two longitudinal beams; one of the first cross beams is fixed with the intermediate partition plate, the other first cross beam is fixed with the second side plate, and the remaining first cross beams are arranged at intervals between the above two first cross beams; the third cross beam is fixed above the first side plate, and the plurality of second cross beams are fixed at intervals between the two longitudinal beams and at a position between the first side plate and the intermediate partition plate.

[0013] In a preferred embodiment of the application, the strength of the first cross beam is greater than that of the second cross beam, and a plurality of wire inlet holes are formed in the third cross beam.

[0014] In a preferred embodiment of the present application, a third chamber is arranged in parallel with the second chamber along the width direction of the bottom plate in the first clean room, and a partitioned back plate is arranged between each chamber; a plurality of first partition plates and a plurality of third partition plates are arranged in the first chamber and the third chamber in parallel with the back plate, respectively, and the plurality of first partition plates and the plurality of third partition plates divide the first chamber and the third chamber into a plurality of first sub-chambers and a plurality of third sub-chambers, respectively.

[0015] In a preferred embodiment of the present application, the first side plate is provided with a first opening corresponding to the first chamber and the second chamber, and a door structure is arranged at the first opening and sealed by a sealing strip.

[0016] In a preferred embodiment of the present application, a mounting partition plate is arranged at a corner of the dirty room and close to the second side plate to divide the dirty room into a second clean room and a main body of the dirty room, and the mounting partition plate is made of aluminum alloy.

[0017] In a preferred embodiment of the present application, two wind baffles with through holes are symmetrically arranged at both sides of the main body of the dirty room and close to the intermediate partition plate.

[0018] In a preferred embodiment of the present application, a plurality of first mounting holes are arranged on the bottom plate corresponding to the second chamber, a plurality of second mounting holes are arranged on the bottom plate corresponding to a portion of the main body of the dirty room close to the intermediate partition plate, and a plurality of third mounting holes are arranged on the bottom plate corresponding to a portion of the main body of the dirty room close to the second side plate, a door structure is arranged at each of the first mounting holes, the second mounting holes and the third mounting holes and sealed by a sealing strip, and a plurality of air outlets are arranged on the door structure corresponding to the third mounting holes.

[0019] In a preferred embodiment of the present application, the top of the top frame is covered with a top aluminum plate, and a door structure is arranged on each side of the box corresponding to the first sub-chamber and the third sub-chamber and sealed by a sealing strip; a door structure is arranged on each side of the box corresponding to the second clean room and the main body of the dirty room close to the second side plate and sealed by a sealing strip.

[0020] In a preferred embodiment of the present application, a plurality of second openings are arranged on the second side plate corresponding to the main body of the dirty room, and a cover plate is arranged at each of the second openings and sealed by a sealing strip.

[0021] In a preferred embodiment of the present application, a plurality of load-bearing beams are arranged on the top frame corresponding to the dirty room.

[0022] As described above, the box in the present application adopts aluminum alloy material, which not only reduces the weight, but also makes it easy to form a specific shape, so that the bottom plate, the first side plate, the second side plate and the intermediate partition plate can be made of profiled plate structure while adopting aluminum alloy material, so that the whole box not only reduces the weight by adopting aluminum alloy material, but also ensures the strength requirement through the structure design of the profiled plate, to meet the requirement of lightening of the motor train unit.

[0023] At the same time, since the profiled plate is formed with a structure for mounting the electrical components, it is no longer necessary to increase the mounting plate and other adapter structures for mounting the electrical components, so that the assembly of each electrical component of the motor train unit converter is more convenient, and the assembly difficulty is reduced. Moreover, since the mounting plate and other adapter structures are reduced, it is also more conducive to the direct force transmission from the top frame to the bottom plate, improving the strength and stability of the box. In addition, the whole box is divided into the first clean room and the dirty room, and the first clean room is provided with the first chamber and the second chamber, realizing the modular structure design, so that the structure is more compact and the installation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0024] The following drawings are only intended to illustrate and explain the present application, and do not limit the scope of the present application.

[0025] Among them:

[0026] Figure 1 : Structure diagram of the box provided by the present application Figure 1 .

[0027] Figure 2 : Structure diagram of the box provided by the present application Figure 2 .

[0028] Figure 3 : Top view of the present application Figure 1 .

[0029] Figure 4 : Structure diagram of the profiled plate provided by the present application

[0030] Figure 5 : Longitudinal section view of the profiled plate provided by the present application along the width direction thereof

[0031] Figure 6 : Structure diagram of the structure cavity of the profiled plate provided by the present application along the width direction of the profiled plate

[0032] Figure 7 : Structure diagram of the mounting cavity of the profiled plate provided by the present application along the width direction of the profiled plate

[0033] Figure 8: A schematic diagram of the weld shoulder of the profile plate provided by the present invention along the width direction of the profile plate.

[0034] Figure 9 : This is a schematic diagram of the wire-binding support frame for the profile plate provided by the present invention along the width direction of the profile plate.

[0035] Figure 10 : A schematic diagram of the assembly structure of the profile plate provided by the present invention, in which bolts are installed in the mounting cavity.

[0036] Figure 11 : For the present invention Figure 4 A magnified structural diagram of point A in the middle.

[0037] Figure 12 This is a schematic diagram of two complete profile plates being spliced ​​together according to the present invention.

[0038] Figure 13 The present invention provides a complete profile plate and another edge plate. Figure 12 A schematic diagram of the splicing of profile panels after N-line cutting.

[0039] Figure 14 The present invention provides a complete profile plate and another edge plate. Figure 12 A schematic diagram of the splicing of profile panels after M-line cutting.

[0040] Figure 15 The present invention provides a complete profile plate and another edge plate. Figure 12 A schematic diagram of the splicing of profile panels after L-line cutting.

[0041] Explanation of icon numbers:

[0042] 1. Top frame; 11. Longitudinal beam; 12. First crossbeam; 13. Second crossbeam; 14. Third crossbeam; 141. Cable entry hole; 15. First load-bearing beam; 16. Second load-bearing beam; 17. Hanger; 18. Wiring bracket; 19. Reinforcing rib;

[0043] 2. Bottom panel;

[0044] 3. First side panel; 31. First opening; 32. Cable inlet;

[0045] 4. Second side panel;

[0046] 5. Intermediate partition;

[0047] 6. First clean room; 61. Back panel; 62. First chamber; 621. First partition plate; 63. Second chamber; 64. Third chamber; 641. Third partition plate;

[0048] 7. Dirty chamber; 71. Install partition; 72. Second clean chamber; 73. Main body of dirty chamber; 731. Wind baffle;

[0049] 81. Mounting cavity; 811. Mounting hole; 8111. Insertion area; 8112. Limiting area; 82. Structural cavity; 83. Wire tie support frame; 831. First plate; 832. Second plate; 8321. Wire fixing hole; 84. Weld shoulder; 85. Bolt; 851. Bolt head. Detailed Implementation

[0050] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0051] like Figures 1 to 3 As shown, this embodiment provides a housing for a power unit converter suitable for a high-speed train. The housing is rectangular in shape and is installed under the body of the high-speed train. The housing includes a top frame 1 and a bottom plate 2 that are horizontally spaced at upper and lower intervals. The bottom plate 2 has a first side plate 3 and a second side plate 4 that are vertically arranged at both ends along its length.

[0052] A middle partition 5 is fixedly provided between the first side plate 3 and the second side plate 4 along the width direction of the bottom plate 2. The tops of the first side plate 3, the second side plate 4, and the middle partition 5 are fixedly connected to the top frame 1. The middle partition 5 and the first side plate 3 form a first clean chamber 6, and the middle partition 5 and the second side plate 4 form a dirty chamber 7. At least a first chamber 62 and a second chamber 63 are arranged side by side in sequence along the width direction of the bottom plate 2 within the first clean chamber 6. The bottom plate 2, the top frame 1, the first side plate 3, the second side plate 4, and the middle partition 5 are all made of aluminum alloy. The bottom plate 2, the first side plate 3, the second side plate 4, and the middle partition 5 are all made of profile plates, and the profile plates are formed with mounting structures for installing electrical components.

[0053] Specifically, the longitudinal direction of the first chamber 62 and the second chamber 63 is consistent with the longitudinal direction of the box. The upper and lower ends of the first side plate 3, the second side plate 4 and the intermediate partition plate 5 are respectively welded to the top frame 1 and the bottom plate 2, and the entire box is welded by an aluminum beam structure and an aluminum plate structure to form a cubic frame structure. The aluminum beam structure is the main load-bearing structure of the box, and the profiled plate is the mounting structure of the large mass electrical components. The aluminum plate structure is the auxiliary load-bearing structure and sealing structure of the box, and is also the mounting structure of the small mass electrical components and the wiring harness. In use, the top of the box is suspended from the bottom of the vehicle body of the EMU in a hanging manner, the first clean room 6 is used to mount the traction converter assembly, and the dirty room 7 is used to mount the auxiliary converter assembly and the cooling unit assembly. The size of the entire box is determined according to the structure of the applicable EMU, for example, the size of the box in the embodiment is 4690mm x 2390mm x 687mm.

[0054] Since the box for the EMU has a large volume, generally more than 4m 3 In order to ensure the strength and rigidity requirements of the entire box, the box is generally welded by steel material in the prior art, but this makes the entire box heavier. In addition, since it is difficult to customize a special structure by steel material, more mounting plates and other adapter structures need to be added in the box made of steel material in the prior art to mount the electrical components, which makes the structure more complex, and since more electrical components are mounted in the box for the EMU, the assembly difficulty is further increased. In addition, the setting of the adapter structure also affects the direct force transmission from the top frame 1 to the bottom plate 2.

[0055] The box in the embodiment is made of aluminum alloy material, which not only reduces the weight, but also makes it easy to make a specific shape. The bottom plate 2, the first side plate 3, the second side plate 4 and the intermediate partition plate 5 can be made of profiled plates while using aluminum alloy material, so that the entire box can meet the light weight requirement of the EMU while ensuring the strength requirement through the structural design of the profiled plates.

[0056] At the same time, since the profiled plates are formed with structures for mounting electrical components, it is no longer necessary to add mounting plates and other adapter structures to mount the electrical components, which makes it more convenient to assemble the electrical components of the converter of the EMU and reduces the assembly difficulty. Moreover, since the setting of the adapter structure is reduced, it is also more conducive to the direct force transmission from the top frame 1 to the bottom plate 2, thereby improving the strength and stability of the box. In addition, the entire box is divided into the first clean room 6 and the dirty room 7, and the first chamber 62 and the second chamber 63 are provided in the first clean room 6, so as to realize the modular structure design, which makes the structure more compact and the installation more convenient.

[0057] The following will be described with reference toFigures 4 to 15 The specific structure of the profile plate is described as follows:

[0058] Referring to Figs. Figure 4 , Figure 5 and Figures 12-15 , the profile plate is internally formed with at least one structure cavity 82 and at least one mounting cavity 81, the structure cavity 82 and the mounting cavity 81 both extend through along the length direction of the profile plate, and the structure cavity 82 and the mounting cavity 81 are arranged along the width direction of the profile plate and are independent of each other. The top of the mounting cavity 81 is provided with at least one mounting hole 811 penetrating the upper surface of the profile plate, and the upper surface of the profile plate is provided with at least one wire support 83. The mounting cavity 81, the mounting hole 811 and the wire support 83 constitute the mounting structure on the profile plate.

[0059] Specifically, the upper surface between the inside of each structure cavity 82 and the upper surface of the profile plate forms the top plate of the structure cavity 82, the lower surface between the inside of each structure cavity 82 and the lower surface of the profile plate forms the bottom plate of the structure cavity 82, the upper surface between the inside of each mounting cavity 81 and the upper surface of the profile plate forms the top plate of the mounting cavity 81, the lower surface between the inside of each mounting cavity 81 and the lower surface of the profile plate forms the bottom plate of the mounting cavity 81, and a partition wall is formed between every two adjacent cavities (which can be every two adjacent structure cavities 82, every two adjacent mounting cavities 81 or adjacent structure cavities 82 and mounting cavities 81).

[0060] The structure cavities 82 in the profile plate can improve the strength of the profile plate, reduce the weight of the profile plate and reduce the production cost of the profile plate. The mounting cavities 81 are used for mounting other mechanical parts (such as bolts 85 and screws), and during mounting, each mechanical part can be positioned in the mounting cavity 81, only the working part is exposed outside the mounting cavity 81, and the entire mechanical part does not need to be fixed on the surface of the profile plate, so that the surface of the profile plate is clean and the flatness of the box body is improved.

[0061] The mechanical parts such as the bolts 85 and the screws can be detachably positioned and mounted in the mounting cavities 81 through the mounting holes 811, so that the mounting of other mechanical parts is facilitated, the profile plate is not welded, the hardness, strength, plasticity and other properties of the profile plate are not reduced due to welding, and the wire harness of the functional device can be conveniently fixed on the wire support 83 which is close or at other appropriate positions during assembly. In addition, the wire support 83 and the profile plate are integrally formed and fixed, and do not need to be welded, so that the damage of the profile plate caused by welding is avoided.

[0062] Therefore, by setting a structural cavity 82 inside the profile plate, the structural strength of the profile plate can be effectively improved and its weight reduced. This allows the entire housing to reduce weight using aluminum alloy material while ensuring strength requirements through the structural design of the profile plate, thus meeting the lightweight requirements of the EMU. Simultaneously, by setting an installation cavity 81 inside the profile plate, the installation of mechanical structures such as bolts 85 and screws can be easily achieved. When installing electrical components, they can be directly fixed to the mounting holes 811 on the profile plate using bolts 85 or screws. This eliminates the need for additional mounting plates or other transition structures for installing electrical components, greatly simplifying the structure of the housing, improving its flatness, and significantly reducing the assembly difficulty of the electrical components, making assembly more convenient.

[0063] Furthermore, such as Figure 4 , Figure 5 and Figures 12-15 As shown, there are multiple structural cavities 82 and multiple mounting cavities 81. The multiple structural cavities 82 and multiple mounting cavities 81 are arranged along the width direction of the profile plate and are independent of each other. Each mounting cavity 81 is arranged adjacent to each other or at least one structural cavity 82 is arranged between every two mounting cavities 81. Each structural cavity 82 is arranged adjacent to each other or at least one mounting cavity 81 is arranged between every two structural cavities 82. That is, the multiple structural cavities 82 and multiple mounting cavities 81 can be arranged in any order periodically or non-periodically along the direction of the profile plate, so that the structure of the profile plate has flexible and varied characteristics.

[0064] As a preferred option, such as Figure 5 , Figure 7 , Figure 10 and Figures 12-15 As shown, the cross-section of the mounting cavity 81 is a U-shaped structure, and the mounting hole 811 is opened at the position corresponding to the uppermost end of the U-shaped structure on the profile plate. Please refer to [link / reference]. Figure 10 The structure of the mounting cavity 81 is designed as a convex shape. On the one hand, it can reduce the thickness at the opening position of the mounting hole 811, making the opening operation of the mounting hole 811 easier. On the other hand, it can ensure the thickness at the position where the opening edge of the mounting hole 811 engages with the bolt head 851 of the bolt 85, thereby ensuring its strength. When the screw located outside the mounting cavity 81 is under force, it can prevent the opening edge of the mounting hole 811 from deforming or cracking under the action of the bolt head 851, thus ensuring the reliable installation of mechanical parts in the mounting cavity 81.

[0065] As a preferred option, such as Figure 4 and Figure 11As shown, the mounting hole 811 comprises an insertion area 8111 and a limiting area 8112, the dimension of the insertion area 8111 along the width direction of the profile plate is greater than the dimension of the limiting area 8112 along the width direction of the profile plate, and the limiting area 8112 extends along the length direction of the profile plate, for example, the bolt 85 is installed, in the installation process, the bolt head 851 is inserted into the inside of the mounting cavity 81 through the insertion area 8111, then the bolt 85 slides to the limiting area 8112, after the bolt 85 enters the limiting area 8112, the top plate of the mounting cavity 81 at the edge of the limiting area 8112 limits the bolt head 851 in the inside of the mounting cavity 81, so that the bolt 85 can only reciprocate along the length direction of the limiting area 8112 and cannot be taken out of the limiting area 8112, thereby limiting the bolt 85 and the mounting cavity 81, then the bolt 85 is adjusted to the appropriate position, finally, the washer is sleeved on the bolt 85 in the upward direction of the profile plate, and the nut is screwed to position the bolt 85, so that the installation of the bolt 85 is completed.

[0066] As preferred, as shown in Figure 4 As shown, the mounting holes 811 are arranged in pairs, and the limiting areas 8112 of the two mounting holes 811 of each pair are arranged oppositely, that is, the distance between the limiting areas 8112 of the two mounting holes 811 of each pair is less than the distance between the insertion areas 8111 of the two mounting holes 811 of each pair, so as to prevent the mechanical parts installed on the profile plate from sliding and falling out in the length direction of the profile plate.

[0067] As preferred, the limiting area 8112 is a linear structure extending along the length direction of the profile plate, and the insertion area 8111 is a circular structure, a hexagonal structure or a linear structure perpendicular to the limiting area 8112. It should be noted that the shape structure of the limiting area 8112 and the shape structure of the insertion area 8111 are not limited to the above, as long as the limiting area 8112 can limit the bolt 85 so that it cannot be separated from the mounting cavity 81, and the insertion area 8111 can allow the bolt head 851 of the bolt 85 to be inserted.

[0068] As preferred, as shown in Figures 4-7 and Figures 12-15 As shown, the longitudinal section of the structure cavity 82 along the width direction of the profile plate is rectangular, trapezoidal, triangular, circular, elliptical or hexagonal, and the present application is not limited thereto. When the longitudinal section of the structure cavity 82 is rectangular, trapezoidal, triangular or hexagonal, the corners on the inner wall of the structure cavity 82 are chamfered or rounded to improve the structural strength of the structure cavity 82.

[0069] Further, as shown in Figure 5 and Figures 12-15As shown, the plate-shaped welding shoulder 84 is integrally connected to both sides of the profile plate along the width direction of the profile plate, the lower surface of the welding shoulder 84 is flush with the lower surface of the profile plate, and the welding shoulder 84 extends along the length direction of the profile plate, the thickness of the welding shoulder 84 is the same as the thickness of the bottom plate of the mounting cavity 81 and the thickness of the bottom plate of the structural cavity 82, and the width of the welding shoulder 84 is the same as the size of the mounting cavity 81 along the width direction of the profile plate.

[0070] Please refer to Figures 12-15 , by setting the welding shoulder 84, the welding connection between the two profile plates can be smoothly realized, and the welding method can be one or a combination of friction stir welding, arc welding, and laser welding, and the present application is not limited thereto; in addition, Figures 13-15 The profile plate is cut along the N line, the profile plate is cut along the M line, and the profile plate is cut along the L line, it can be seen that when the thickness of the welding shoulder 84 is the same as the thickness of the bottom plate of the mounting cavity 81 and the thickness of the bottom plate of the structural cavity 82, and the width of the welding shoulder 84 is the same as the size of the mounting cavity 81 along the width direction of the profile plate, the edges of the profile plate cut along the above L line, M line and N line are exactly the same as the edges of the complete profile plate, so that the structural strength of the profile plate with reduced width after cutting can be effectively guaranteed.

[0071] Further, as shown in Figure 4 , Figure 5 , Figure 9 and Figures 12-15 , the wire support frame 83 includes a first plate body 831 and a second plate body 832, the first plate body 831 and the second plate body 832 both extend along the length direction of the profile plate, the first plate body 831 is arranged vertically to the upper surface of the profile plate, the lower edge of the first plate body 831 is connected to the upper surface (any position) of the profile plate, the second plate body 832 is arranged parallel to the upper surface of the profile plate, one side edge of the second plate body 832 is connected to the upper edge of the first plate body 831, and the first plate body 831 and the second plate body 832 are perpendicular to each other, that is, the structure of the wire support frame 83 is similar to that of the angle steel, and a wire fixing hole 8321 is formed on the second plate body 832 for fixing the wire harness of the functional device, wherein the height of the first plate body 831 and the width of the second plate body 832 can be flexibly adjusted according to actual conditions.

[0072] As preferred, as shown in Figure 4 , Figure 5 , Figure 9 and Figures 12-15As shown, the position where the lower edge of the first plate body 831 meets the upper surface of the profiled plate is above the partition wall between the adjacent installation cavities 81 and the structural cavities 82, above the partition wall between the two adjacent installation cavities 81, or above the partition wall between the two adjacent structural cavities 82, so as to ensure the structural strength of the wire bundling support frame 83 after being connected with the profiled plate, and avoid the deformation or even the rupture of the upper surface of the profiled plate due to the inclination or depression of the wire bundling support frame 83 during the process of fixing the wire harness on the wire bundling support frame 83.

[0073] Preferably, the installation cavity 81 is filled with thermal insulation material and / or noise reduction material; the profiled plate is made of aluminum alloy; and the profiled plate is manufactured by one or a combination of multiple processes of extrusion molding, casting, machining and additive manufacturing.

[0074] In summary, compared with the prior art, the profiled plate in the embodiment has the following advantages: the profiled plate provided by the embodiment can conveniently realize the installation of mechanical structures such as bolts 85 and screw rods by arranging the installation cavities 81 inside, effectively improve the structural strength of the profiled plate and reduce the weight of the profiled plate by arranging the structural cavities 82, and the width of the structural cavities 82 and the installation cavities 81 can be set smaller, so that when a certain width is required to be achieved by cutting and splicing, the cutting can be conveniently performed between two cavities (between the installation cavities 81 and the structural cavities 82, between the two installation cavities 81, or between the two structural cavities 82), and a certain cutting part can be welded and fixed with other whole or partial profiled plates to meet various width requirements.

[0075] In the specific implementation process, the box body can be applied to high-speed EMUs or low-speed EMUs. The high-speed EMU refers to an EMU with a speed of more than 300 km / h, and the general speed is 300-350 km / h, while the low-speed EMU refers to an EMU with a speed of less than 300 km / h.

[0076] When the box body is applied to a high-speed EMU, more electrical components are installed. In order to make the structure more compact and facilitate the installation and wiring of the electrical components, the detailed structure of the box body applied to a high-speed EMU is as shown in Figures 1 to 3 Specifically, as shown in

[0077] For the top frame 1:

[0078] Referring to Figure 2The top frame 1 comprises two longitudinal beams 11 arranged in parallel and spaced apart, and a plurality of first cross beams 12, a plurality of second cross beams 13 and a third cross beam 14 fixed transversely between the two longitudinal beams 11, each beam being welded together. One of the first cross beams 12 is fixed with the middle partition plate 5, and the other first cross beam 12 is fixed with the second side plate 4, and the remaining first cross beams 12 are arranged at intervals between the two first cross beams 12. The third cross beam 14 is fixed above the first side plate 3, and the plurality of second cross beams 13 are fixed at intervals between the two longitudinal beams 11 and located between the first side plate 3 and the middle partition plate 5.

[0079] In actual application, a plurality of wire inlet holes 141 are formed in the third cross beam 14, which are generally formed corresponding to the first chamber 62 and the second chamber 63 to facilitate wire inlet. In addition, the strength of the first cross beam 12 is greater than that of the second cross beam 13 (the cross-sectional size of the first cross beam 12 is greater than that of the second cross beam 13).

[0080] Since the weight of the electrical components in the first clean chamber 6 is relatively light, and the weight of the electrical components in the dirty chamber 7 is relatively heavy, in order to meet the strength and stability requirements of the entire box body, the strength of the first cross beam 12 is greater than that of the second cross beam 13, and the strength of the first cross beam 12 is generally 1.5-2 times that of the second cross beam 13. At the same time, the second cross beam 13 has lower strength and relatively thin diameter, occupying less space, which is also more conducive to regional division. In addition, since the weight of the electrical components in the dirty chamber 7 is relatively heavy, in order to further increase the strength and stability of the box body, a plurality of load-bearing beams, such as the first load-bearing beam 15 and the second load-bearing beam 16 described below, are generally provided in the part of the top frame 1 corresponding to the dirty chamber 7.

[0081] In order to facilitate the top of the box body to be suspended in a hanging manner at the bottom of the car body of the EMU, a plurality of hanging seats 17 extending outward in the circumferential direction of the top frame 1 are provided, i.e. a plurality of hanging seats 17 are provided on the two longitudinal beams 11, the first cross beam 12 fixed with the second side plate 4 and the third cross beam 14. The specific number of hanging seats 17 can be determined according to the structure of the applicable EMU, for example, 18 hanging seats 17 are provided in the embodiment according to the structure shown in FIG. 2. The number of the first cross beam 12, the second cross beam 13 and the load-bearing beam is determined according to the electrical function to be achieved, for example, three first cross beams 12 and three second cross beams 13 are provided in the embodiment. Figure 2

[0082] For the first clean chamber 6:

[0083] ​In the first clean room 6, along the width direction of the bottom plate 2, a third chamber 64 is arranged side by side with the second chamber 63, and a partitioned back plate 61 is arranged between each chamber. A plurality of first partition plates 621 and a plurality of third partition plates 641 are arranged perpendicularly to the back plate 61 in the first chamber 62 and the third chamber 64, respectively, and the first chamber 62 and the third chamber 64 are divided into a plurality of first sub-chambers and a plurality of third sub-chambers by the plurality of first partition plates 621 and the plurality of third partition plates 641, respectively.

[0084] The upper and lower ends of the two back plates 61 are welded to the top frame 1 and the bottom plate 2, respectively, the third chamber 64 and the first chamber 62 are completely symmetrical, mainly used for installing larger electrical components in the traction converter assembly, the plurality of first sub-chambers and the plurality of third sub-chambers are used for installing the traction control unit, the power module, the contactor and the resonance capacitor in the traction converter assembly, respectively, and the second chamber 63 is used for installing the intermediate capacitor and the resistance module in the traction converter assembly.

[0085] In this way, the first chamber 62 and the third chamber 64 can not only assemble electrical components but also bear weight, the plurality of first partition plates 621 and the plurality of third partition plates 641 are welded to the second cross beam 13 of the top frame 1 and the bottom plate 2 at the same time, and the first partition plates 621 and the third partition plates 641 divide the first chamber 62 and the third chamber 64 into a plurality of space structures, respectively, which refines the design of the modular structure, improves the strength of the structure, makes assembly more convenient, improves the efficiency of assembling electrical components, and makes the structure more compact.

[0086] In the specific implementation process, a square hole is opened in the part of the back plate 61 corresponding to the installation of the power module in the traction converter assembly, and a motor rack is arranged at the square hole to facilitate the auxiliary installation of the power module in the traction converter assembly, and the square hole also plays a role in weight reduction. The first partition plate 621 and the third partition plate 641 in the first chamber 62 and the third chamber 64, respectively, near the first side plate 3 mainly play a supporting and bearing role, and generally no weight-reducing hole is opened in these two partition plates, while a plurality of weight-reducing holes are generally opened in the remaining first partition plates 621 and third partition plates 641, which plays a role in weight reduction and is also conducive to arranging control lines and better force transmission.

[0087] In actual application, the number of the first partition plates 621 and the third partition plates 641 can be selected according to the actual electrical functions to be realized, for example, the number of the first partition plates 621 and the third partition plates 641 can be selected according to the number of the power modules in the traction converter assembly. Figure 1 and Figure 2The three first partition plates 621 and three second partition plates are arranged to form four first sub-chambers and four third sub-chambers. At this time, the four first sub-chambers are used to sequentially install the contactor, power module, power module and resonance capacitor in the traction converter assembly from the first side plate 3 to the middle partition plate 5, and the four third sub-chambers are used to sequentially install the traction control unit, power module, power module and resonance capacitor in the traction converter assembly from the first side plate 3 to the middle partition plate 5. The resistance module in the second chamber 63 is installed close to the first side plate 3, and the middle capacitor is installed close to the middle partition plate 5, so as to facilitate inspection and maintenance. The installation layout of such electrical components is more convenient for wiring, simplifies the overall structure, and is more conducive to realizing the functions of each electrical component. In addition, in order to facilitate wiring, the power module in the auxiliary converter assembly is generally installed in the first sub-chamber or the third sub-chamber close to the middle partition plate 5.

[0088] Of course, since the first chamber 62 and the third chamber 64 are completely symmetrical, the electrical components installed therein can also be transposed. The traction control unit, contactor, power module, resonance capacitor, middle capacitor and resistance module described above are all components of the traction converter assembly, and this part is prior art. Other electrical components in the traction converter assembly can be installed at any gap while considering convenient wiring.

[0089] The electrical components in the first chamber 62 and the third chamber 64 are generally placed and disassembled from both sides of the box, and a plurality of first installation openings are generally formed in the part of the bottom plate 2 corresponding to the second chamber 63, so as to facilitate the disassembly of the electrical components in the second chamber 63 by the bottom. In addition, the top frame 1 corresponding to the first chamber 6 is also provided with a plurality of wiring supports 18 to facilitate wiring and increase strength. The specific number and installation position of the wiring supports 18 are determined according to actual needs, and the present application does not limit this.

[0090] Therefore, for the first chamber 6, the first chamber 6 is divided into a plurality of module spaces by the cooperation of the back plate 61, the first partition plate 621 and the third partition plate 641, so that the structure is more compact, the assembly of electrical components is more convenient, and the strength of the structure is also improved. At the same time, each electrical component enters the first chamber 62, the third chamber 64 and the second chamber 63 from both sides and the bottom of the box, so that the disassembly of the electrical components is more convenient, and the assembly efficiency is further improved. The layout of each electrical component in each module space is also more convenient for wiring to simplify the structure.

[0091] For the first side plate 3:

[0092] The first side plate 3 is welded by a plurality of the above-mentioned profile plates, preferably spliced by friction stir welding, so that the plates are more easily fused after welding, avoiding the presence of pores and ensuring flatness. The first side plate 3 is simultaneously welded to the top frame 1 and the bottom plate 2. The portions of the first side plate 3 corresponding to the first chamber 62 and the second chamber 63 are each provided with a first opening 31. A door structure is provided at the first opening 31, and a sealing strip is provided at the first opening 31 for sealing to achieve the sealing of the end face of the box. The provision of the door structure makes it more convenient to install and maintain the electrical components in the first chamber 62 and the second chamber 63. After the electrical components are installed, the door structure is closed. When maintenance is required, the door structure is opened. In addition, a plurality of wire entry ports 32 are provided on the first side plate 3 corresponding to the third chamber 64 to facilitate wire entry.

[0093] For the dirty chamber 7:

[0094] An installation partition 71 is provided at a corner of the dirty chamber 7 and close to the second side plate 4 to divide the dirty chamber 7 into a second clean chamber 72 and a dirty chamber body 73. The installation partition 71 is made of aluminum alloy.

[0095] The installation partition 71 is generally L-shaped and is simultaneously welded to the top frame 1, the bottom plate 2, and the second side plate 4, serving as a sealing function while bearing the contactors. The second clean chamber 72 is used to install the contactors in the auxiliary inverter assembly, and the dirty chamber body 73 is the main bearing structure for active mass electrical components, used to install the cooling unit assembly and the transformer and resonant inductor in the auxiliary inverter assembly. The installation partition 71 divides the entire dirty chamber 7 into the second clean chamber 72 at a corner and the dirty chamber body 73 in the remaining part of the dirty chamber 7, adopting a modular structure design that improves structural strength and is more conducive to the assembly of electrical components.

[0096] In this embodiment, to meet the cooling effect of each electrical component and save costs, the electrical components in the first clean chamber 6 (mainly power modules) are cooled by water, and the electrical components in the dirty chamber 7 (mainly transformers and resonant inductors) are cooled by air. The cooling unit assembly includes a heat sink, a current collector, a fan, a water pump, and a cooling water pipe. The portion of the dirty chamber body 73 close to the intermediate partition 5 is used to install the heat sink, the current collector, the fan, and the water pump, and the portion of the dirty chamber body 73 close to the second side plate 4 is used to install the above-mentioned transformer and resonant inductor. The cooling water pipe extends from the dirty chamber body 73 to the first clean chamber 6 to water-cool the power modules in the first clean chamber 6.

[0097] Specifically, in order to facilitate the setting of electrical components in the dirty chamber body 73 and the air cooling effect of the fan on the electrical components, in actual application, two wind baffle plates 731 with through holes are symmetrically arranged on both sides of the dirty chamber body 73 and close to the intermediate partition plate 5, and the space formed by the two wind baffle plates 731 and the two sides of the box body is used to install one radiator and one current collector in the cooling unit assembly respectively, and the space between the two wind baffle plates 731 is used to install the fan and the water pump in the cooling unit assembly. The fan preferably adopts a double-shaft centrifugal fan, and the two current collectors are connected with the fan through the through holes on the wind baffle plates 731. Since the heating temperature of the transformer is higher than that of the resonant inductor, the position corresponding to the space between the two wind baffle plates 731 in the part of the dirty chamber body 73 close to the second side plate 4 is used to install the transformer, and the position close to the side of the box body is used to install the resonant inductor.

[0098] The whole dirty chamber 7 adopts forced air cooling form. In normal operation, the centrifugal fan causes negative pressure in the air duct, and the natural air is sucked into the radiator from both sides of the box body, and the temperature of the natural air is reduced after heat dissipation, and then the natural air is sucked into the fan through the current collector, and then the natural air with reduced temperature is blown to the transformer and the resonant inductor. Since the temperature of the natural air with reduced temperature is lower than the heating temperature of the transformer and the resonant inductor, the transformer and the resonant inductor can be cooled. Finally, the natural air is discharged from the bottom of the box body. The direction of the natural air is shown by the arrow in Figure 3 .

[0099] The contactor in the second clean chamber 72 and the radiator and current collector in the dirty chamber body 73 are generally put in, disassembled and maintained subsequently from the corresponding two sides of the box body. A plurality of second installation openings are formed in the bottom plate 2 corresponding to the part of the dirty chamber body 73 close to the intermediate partition plate 5, and a plurality of third installation openings are formed in the bottom plate 2 corresponding to the part of the dirty chamber body 73 close to the second side plate 4, so as to realize disassembly and maintenance of the fan, the water pump, the transformer and the resonant inductor from the bottom.

[0100] In order to facilitate the support of the active component fan, so that the fan works effectively, and at the same time increase the strength and stability of the box body, a plurality of first bearing beams 15 are arranged in the corresponding part of the top frame 1 in the area between the two wind baffle plates 731, and a plurality of second bearing beams 16 are arranged in the corresponding part of the top frame 1 in the area close to the second side plate 4 in the dirty chamber body 73. The second bearing beam 16 is installed on the top frame 1 by bolts to ensure that the fan runs more stably.

[0101] For the second side plate 4:

[0102] The second side plate 4 is welded by a plurality of the profiled plates, preferably by friction stir welding. The second side plate 4 is welded to the top frame 1 and the bottom plate 2. The second side plate 4 is provided with a plurality of second openings corresponding to the dirty chamber body 73. The second openings are provided with cover plates and sealed by sealing strips, so as to seal the end face of the box.

[0103] The cover plates are mainly provided for facilitating the disassembly and assembly of the cooling water pipes. The cover plates are in an open state when the cooling water pipes are installed, and are in a closed state after the installation of the cooling water pipes. The cover plates will not be opened again unless special circumstances. Since the cooling water pipes extend from the second side plate 4 to the end of the first clean chamber 6, the cooling water pipes are generally maintained and inspected by opening the door structure on the first side plate 3. In addition, a plurality of wire outlets are provided on the second side plate 4 to facilitate the wire outlet.

[0104] For the intermediate partition plate 5:

[0105] The intermediate partition plate 5 is welded by a plurality of the profiled plates, preferably by friction stir welding. The intermediate partition plate 5 is welded to the top frame 1 and the bottom plate 2. The intermediate partition plate 5 divides the entire box into the dirty chamber 7 and the clean chamber, and plays a sealing role. At the same time, the force of the top frame 1 can be better transmitted to the bottom plate 2 during operation. The frame of the first clean chamber 6 and the second clean chamber 72 has a clear sealing performance requirement, while the frame of the dirty chamber body 73 has no clear sealing performance requirement.

[0106] For the bottom plate 2:

[0107] The bottom plate 2 is welded by a plurality of the profiled plates, preferably by friction stir welding. Each electrical component can be directly fixed in the mounting hole of the profiled plate of the bottom plate 2 by a bolt, which is simple and convenient. A plurality of first mounting holes are provided on the bottom plate 2 corresponding to the second chamber 63. A plurality of second mounting holes are provided on the bottom plate 2 corresponding to the part of the dirty chamber body 73 close to the intermediate partition plate 5. A plurality of third mounting holes are provided on the bottom plate 2 corresponding to the part of the dirty chamber body 73 close to the second side plate. The door structure is provided at the first mounting hole, the second mounting hole and the third mounting hole and sealed by the sealing strip. A plurality of air outlets are provided on the door structure corresponding to the third mounting hole, so as to facilitate the air outlet.

[0108] The first installation port, the second installation port corresponding to the part between the two wind baffles 731 and the third installation port are mainly used for facilitating the disassembly and assembly of the corresponding electrical components in the chambers from the bottom and the later maintenance; the second installation ports corresponding to the spaces formed by the two wind baffles 731 and the two sides of the cabinet are mainly used for facilitating the later maintenance of the heat sink and the current collector. Of course, when installing the electrical components, the electrical components and the adjacent plates can be fixed by bolts according to the needs.

[0109] Further, in order to ensure the sealing of the entire first clean room and the second clean room, and better protect the entire cabinet, the top of the top frame 1 is covered with a top aluminum plate, the cabinet sides corresponding to the first sub-chamber and the third sub-chamber are respectively provided with a door structure and are sealed by a sealing strip, the cabinet sides corresponding to the second clean room 72 and the dirty room main body 73 and close to the second side plate 4 are provided with a door structure and are sealed by a sealing strip. The cabinet sides corresponding to the dirty room main body 73 and close to the intermediate partition plate 5 are open to serve as air inlets.

[0110] In addition, in actual application, the bottom plate 2 is provided with a reinforcing rib 19 on each of the front and rear sides along the length direction, which can not only reinforce the cabinet, but also be used for pressing the sealing strip of the car body frame of the EMU. The bottom plate 2, the first side plate 3, the second side plate 4, the top aluminum plate and the door structures form a closed box-shaped structure, effectively improving the overall rigidity of the cabinet, effectively controlling the deformation of the cabinet, and enabling the gravity transmitted by the converter centroid to be smoothly transmitted to the chassis of the car body through the suspension structure, without forming a significant stress weak area.

[0111] The materials of the entire cabinet are all aluminum alloy, i.e., the materials of the top frame 1, the bottom plate 2, the first side plate 3, the second side plate 4, the intermediate partition plate 5, the back plate 61, the first partition plate 621, the third partition plate 641, the installation partition plate 71, the wind baffles 731 and the door structures are all aluminum alloy.

[0112] In summary, the box body in the embodiment adopts aluminum alloy material, and the structure of the profiled plate is matched to reduce the weight of the box body while ensuring the strength. The different strengths of the first cross beam 12 and the second cross beam 13, the weight-reducing holes formed on the partial partition plates, and the mutual cooperation of the load-bearing beams further ensure the strength and stability of the entire box body, meet the lightweight requirements of the EMU, and the weight of the box body in the embodiment is reduced by about 20% compared with the steel structure box body of the same volume. The profiled plate is used for part of the plate of the entire box body, and the box body adopts a modular structure design, so that the processing and manufacturing of the box body are easier, the electrical components are more convenient to assemble, and the flatness of the box body is higher than that of the steel structure box body. Each electrical component can be disassembled from the two sides and the bottom of the box body, so that the operation is more convenient, and the assembly efficiency is further improved.

[0113] In addition, according to the installation layout of each electrical component listed above, wiring is more convenient, so that after the wire is fed from the car body of the EMU, the wire is fed from the end of the box body close to the first side plate 3, and after one round of wiring, the wire is finally taken out from the other end of the box body close to the second side plate 4, so that each corner during wiring is between 90-180 degrees, and the functions of each electrical component are more conducive to being realized.

[0114] In addition, it should be noted that when the box body is applied to a low-speed EMU, the required electrical components are less than those of a high-speed EMU (mainly the number of capacitors is reduced), so that only one of the above-mentioned back plates 61 is needed to divide the first chamber 62 and the second chamber 63 in the first clean room 6, and the third chamber 64 is not needed. In addition, the second clean room 72 can be separated from a corner of the dirty room 7 by installing the partition plate 71 in the above-mentioned manner, or the position of the third chamber 64 can be used as the second clean room 72 for installing the contactor in the auxiliary converter assembly. According to the position of the contactor, the frame will be adaptively adjusted. Under this layout, wiring is also conducive. The remaining structures are the same as those applicable to the high-speed EMU, and will not be described here.

[0115] The above is only a specific embodiment of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of the present application.

Claims

1. A housing for a power unit converter suitable for high-speed trains, applicable to high-speed trains with speeds above 300 km / h, the housing being rectangular in shape and installed under the train body, characterized in that... The enclosure includes a top frame and a bottom plate arranged horizontally at intervals. A first side plate and a second side plate, arranged vertically, are fixed to both ends of the bottom plate along its length. A middle partition is fixed between the first and second side plates along the width of the bottom plate. The tops of the first side plate, the second side plate, and the middle partition are fixedly connected to the top frame. The middle partition and the first side plate form a first clean chamber, and the middle partition and the second side plate form a dirty chamber. At least one first chamber and a second chamber are arranged side-by-side in sequence along the width of the bottom plate within the first clean chamber. The bottom plate, top frame, first side plate, second side plate, and middle partition are all made of aluminum alloy. The bottom plate, first side plate, second side plate, and middle partition are all constructed of profile plates, and mounting structures for installing electrical components are formed on the profile plates. The top frame includes two parallel longitudinal beams, and multiple first crossbeams, multiple second crossbeams, and a third crossbeam fixed transversely between the two longitudinal beams. One first crossbeam is fixed to the middle partition, another first crossbeam is fixed to the second side panel, and the remaining first crossbeams are spaced apart between the two first crossbeams. The third crossbeam is fixed above the first side panel, and the multiple second crossbeams are spaced apart between the two longitudinal beams and located between the first side panel and the middle partition. The strength of the first crossbeams is greater than that of the second crossbeams, and the third crossbeam has multiple inlet holes corresponding to the first and second chambers. Multiple load-bearing beams are provided in the top frame portion corresponding to the internal organs. A third chamber is provided in the first clean chamber along the width of the bottom plate, arranged parallel to the second chamber. Each chamber is separated by a back plate. Three first partition plates and three third partition plates are respectively arranged perpendicular to the back plate in the first chamber and the third chamber, dividing the first chamber and the third chamber into four first sub-chambers and four third sub-chambers. A partition is provided at one corner of the dirty chamber and near the second side plate to divide the dirty chamber into an independent second clean chamber and a dirty chamber main body. The partition is made of aluminum alloy. Two wind baffles with through holes are symmetrically provided on both sides of the dirty chamber main body and near the middle partition. The four first sub-chambers, arranged sequentially from the first side plate towards the middle partition, are used to install the contactor, power module, power module, and resonant capacitor of the traction converter assembly. The four third sub-chambers, also arranged sequentially from the first side plate towards the middle partition, are used to install the traction control unit, power module, power module, and resonant capacitor of the traction converter assembly. The second chamber is used to install the intermediate capacitor and resistor module of the traction converter assembly, with the resistor module installed closer to the first side plate and the intermediate capacitor installed closer to the middle partition. The second clear chamber is used to install the contactor of the auxiliary converter assembly. The power modules in the device assembly are installed in the first or third sub-chamber near the middle partition; the spaces formed by the two baffles and the two sides of the enclosure are used to install a radiator and a collector in the cooling unit assembly; the space between the two baffles is used to install the fan and water pump in the cooling unit assembly; the part of the dirty chamber body near the second side plate, corresponding to the space between the two baffles, is used to install the transformer; the position near the side of the enclosure is used to install the resonant inductor; the cooling water pipes in the cooling unit assembly extend from the dirty chamber body to the first clean chamber to water cool the power modules in the first clean chamber. Electrical components in the first and third chambers can be inserted and removed from both sides of the housing. The first side panel has a first opening corresponding to the first and second chambers, with a door structure at each opening and sealed with a sealing strip. The second side panel has multiple second openings corresponding to the main body of the dirty chamber, with a cover plate at each opening and sealed with a sealing strip. The bottom plate has multiple first mounting ports corresponding to the second chamber, multiple second mounting ports corresponding to the portion of the dirty chamber body near the middle partition, and multiple third mounting ports corresponding to the portion of the dirty chamber body near the second side panel. Door structures are provided at the first, second, and third mounting ports and sealed with sealing strips. Multiple air vents are provided on the door structure corresponding to the third mounting port.

2. The housing for the power unit converter of a high-speed train as described in claim 1, characterized in that, The profile plate has at least one structural cavity and at least one mounting cavity formed inside. The structural cavity and the mounting cavity extend through the length of the profile plate and are arranged independently along the width of the profile plate. The top of the mounting cavity is provided with at least one mounting hole that penetrates the upper surface of the profile plate, and at least one wire tie support frame is provided on the upper surface of the profile plate. The mounting cavity, the mounting hole and the wire tie support frame constitute the mounting structure on the profile plate.

3. The housing for the power unit converter of a high-speed train as described in claim 1, characterized in that, The top frame is sealed with a top aluminum plate, and the first and third sub-chambers are respectively provided with a door structure on both sides of the box and sealed with a sealing strip; Both sides of the main body of the second clean room and dirty room, and the portion near the second side panel, are equipped with door structures and are sealed with sealing strips.

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