CN211352024U - Box body of power unit converter suitable for motor train unit - Google Patents

Abstract

The utility model relates to a box suitable for power unit converter of EMUs, this box are the cuboid shape and install in EMUs automobile body below, and the box is fixed with first curb plate and the second curb plate that is vertical setting respectively including being top frame and the bottom panel that the upper and lower interval of level set up, the length direction both ends of bottom panel. An intermediate partition board is fixedly arranged between the first side board and the second side board along the width direction of the bottom board, a first clean room is formed between the intermediate partition board and the first side board, and a dirty room is formed between the intermediate partition board and the second side board. The bottom plate, the top frame, the first side plate, the second side plate and the middle partition plate are made of aluminum alloy, and the bottom plate, the first side plate, the second side plate and the middle partition plate are made of profile plates. The utility model provides a box can enough guarantee intensity in order to satisfy EMUs lightweight requirement when lightening box weight, can make things convenient for the equipment of power pack converter in order to reduce the assembly degree of difficulty again, and compact structure.

Description

Box body of power unit converter suitable for motor train unit

Technical Field

The utility model relates to a converter box technical field especially relates to a box of power pack converter suitable for EMUs.

Background

The power unit converter is an important high-quality electric appliance part on a high-speed motor train unit, integrates all functions of a traction converter, an auxiliary converter and a cooling unit, has the weight of 3t to 4.5t, adopts a hanging installation mode under a train, has relatively bad working condition and environment, and simultaneously generates vibration by external excitation and self excitation, so the requirements on the operation safety and the reliability of the power unit converter are very high.

As a power unit converter for providing traction power, the box body mainly has the following functions: 1. the power unit flow device can be safely and reliably suspended below the vehicle body; 2. the power unit converter has enough strength and provides a reliable mounting and supporting structure for electrical components of the power unit converter; 3. the electric parts of the power unit converter can work in a proper vibration environment, and 4, the electric parts of the power unit converter have enough corrosion resistance and tightness, and can work in a relatively closed environment and are not influenced by the outside.

The existing power unit converter box body is mainly made of steel, the box body is mainly processed by welding or riveting, and for a high-mass power unit converter for a high-speed motor train unit, the box body is generally a steel welded box body.

The power unit converter box is mainly internally provided with a transformer, a resonance reactor, a traction and auxiliary power module, a resonance and support capacitor, a cooling system, an inlet and outlet device and other electric and mechanical structure parts, wherein the transformer, the resonance reactor, the traction and auxiliary power module and other parts are large-mass devices, the mounting structure is required to have sufficient reliability, the cooling system provides cooling for the electric parts with higher heat productivity, and the cooling mode can be divided into walking air cooling, forced air cooling, water cooling and the like.

The converter of the existing power unit has the following defects: 1. the box body of the power unit is heavy, so that the requirement of light weight of the existing high-speed motor train unit cannot be met; 2. the box body structure of the power unit is not compact enough; 3. the power unit converter is difficult to assemble.

Therefore, the inventor provides the box body of the power unit converter suitable for the motor train unit by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a box suitable for power pack converter of EMUs can guarantee intensity in order to satisfy EMUs lightweight requirement when lightening box weight, makes things convenient for the equipment of power pack converter in order to reduce the assembly degree of difficulty simultaneously, and compact structure.

The utility model aims at realizing the box body of the power unit converter suitable for the motor train unit, which is in a rectangular shape and is arranged below the motor train unit body, the box body comprises a top frame and a bottom plate which are horizontally arranged at an upper interval and a lower interval, and a first side plate and a second side plate which are vertically arranged are respectively fixed at the two ends of the bottom plate in the length direction;

an intermediate partition plate is fixedly arranged between the first side plate and the second side plate along the width direction of the bottom plate, the tops of the first side plate, the second side plate and the intermediate partition plate are fixedly connected to the top frame, a first clean room is formed between the intermediate partition plate and the first side plate, a dirty room is formed between the intermediate partition plate and the second side plate, and a first chamber and a second chamber which are arranged side by side are at least sequentially arranged in the first clean room along the width direction of the bottom plate; the bottom plate, the top frame, the first side plate, the second side plate and the middle partition plate are made of aluminum alloy, the bottom plate, the first side plate, the second side plate and the middle partition plate are made of profile plates, and the installation structure for installing electrical appliance parts is formed on the profile plates.

In a preferred embodiment of the present invention, at least one structural cavity and at least one installation cavity are formed inside the profile plate, the structural cavity and the installation cavity both extend through the length direction of the profile plate, and the structural cavity and the installation cavity are arranged along the width direction of the profile plate and are independent of each other; the top of the installation cavity is provided with at least one installation hole penetrating through the upper surface of the section plate, the upper surface of the section plate is provided with at least one binding support frame, and the installation cavity, the installation hole and the binding support frame form an installation structure on the section plate.

In a preferred embodiment of the present invention, the top frame comprises two longitudinal beams arranged in parallel at an interval, and a plurality of first cross beams, a plurality of second cross beams and a third cross beam transversely fixed between the two longitudinal beams; one of the first cross beams is fixed with the middle partition plate, the other first cross beam is fixed with the second side plate, and the other first cross beams are arranged between the two first cross beams at intervals; the third cross beam is fixed above the first side plate, and the second cross beams are fixed between the two longitudinal beams at intervals and are positioned between the first side plate and the middle partition plate.

In a preferred embodiment of the present invention, the first beam has a strength greater than that of the second beam, and the third beam has a plurality of wire-feeding holes.

In a preferred embodiment of the present invention, a third chamber is further disposed in the first clean room along the width direction of the bottom plate, and a separate back plate is disposed between each chamber; a plurality of first partition plates and a plurality of third partition plates which are perpendicular to the back plate are arranged in the first chamber and the third chamber at intervals respectively, and the first chamber and the third chamber are divided into a plurality of first sub-chambers and a plurality of third sub-chambers by the first partition plates and the third partition plates respectively.

The utility model discloses an in a preferred embodiment, first opening has all been seted up to the part that corresponds first cavity and second cavity on the first curb plate, is equipped with the door structure at first opening part and seals through the sealing strip at first opening part.

The utility model discloses an in a preferred embodiment, just be close to the second curb plate and be equipped with the installation baffle in dirty room one corner department to cut apart into mutually independent second clean room and dirty room main part with dirty room, the material of installation baffle is the aluminum alloy.

In a preferred embodiment of the present invention, two wind deflectors with through holes are symmetrically disposed on both sides of the main body of the dirty chamber and close to the middle partition plate.

The utility model discloses an among the preferred embodiment, a plurality of first installing ports have been seted up to the part that corresponds the second cavity on the panel of bottom, a plurality of second installing ports have been seted up to the part that is close to intermediate bottom plate in the corresponding dirty indoor main part on the panel of bottom, a plurality of third installing ports have been seted up to the part that is close to the second curb plate in the corresponding dirty indoor main part on the panel of bottom, at first installing port, second installing port and third installing port department are equipped with the door structure and seal through the sealing strip, and the structural door that corresponds of third installing port is established and has been seted up a plurality of exhaust vents.

In a preferred embodiment of the present invention, the top of the top frame is covered with a top aluminum plate, and two sides of the box body corresponding to the first sub-chamber and the third sub-chamber are respectively provided with a door structure and sealed by a sealing strip; the box both sides that second clean room and dirty room main part correspond and the part that is close to the second curb plate all are equipped with the door structure and seal through the sealing strip.

The present invention provides a preferred embodiment, wherein the second side plate has a plurality of second openings corresponding to the dirty chamber main body, and the second openings are provided with cover plates and sealed by sealing strips.

In a preferred embodiment of the present invention, a plurality of load beams are provided at the top frame portion corresponding to the dirty chamber.

From above, the utility model provides a box is through adopting the aluminum alloy material, not only can the weight reduction, makes specific shape simultaneously easily for bottom panel, first curb plate, second curb plate and well space bar can make the structure of section bar board when adopting the aluminum alloy material, make whole box guarantee the intensity requirement through the structural design of section bar board when adopting the aluminum alloy material weight reduction, in order to satisfy EMUs lightweight requirement.

Meanwhile, as the structure for installing the electric appliance parts is formed on the section plate, the electric appliance parts are not required to be installed by adding the switching structures such as the installation plate, so that the electric appliance parts of the converter of the motor train unit are more convenient to assemble, and the assembling difficulty is reduced. And owing to reduced the setting of switching structures such as mounting panel, also more be favorable to the top frame to the direct biography power effect of bottom panel, improve the intensity and the stability of box. In addition, cut apart into first clean room and dirty room with whole box, be equipped with first cavity and second cavity in with first clean room simultaneously, realize modular structure design for the structure is compacter, and the installation is more convenient.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

FIG. 1: do the utility model provides a structural schematic diagram of box is first.

FIG. 2: do the utility model provides a structural schematic diagram two of box.

FIG. 3: is a top view of fig. 1 of the present invention.

FIG. 4: do the utility model provides a three-dimensional structure schematic diagram of section bar board.

FIG. 5: for the utility model provides a profile plate along its width direction's longitudinal section schematic diagram.

FIG. 6: for the utility model provides a structural view along the width direction of section bar board of the structural cavity of section bar board.

FIG. 7: for the utility model provides an installation die cavity of section bar board along the width direction's of section bar board structure schematic diagram.

FIG. 8: for the utility model provides a profile plate weld the width direction's of edge profile plate schematic diagram of shoulder.

FIG. 9: for the utility model provides a binding support frame of section bar board's width direction's along section bar board's schematic structure.

FIG. 10: do the utility model provides an install the assembly structure schematic diagram of bolt in the installation die cavity of section bar board.

FIG. 11: is an enlarged schematic structural diagram of a point a in fig. 4 of the present invention.

FIG. 12: do the utility model provides a schematic diagram when two complete section bar boards splice.

FIG. 13: for the utility model provides a profile plate and another profile plate when along the profile plate concatenation behind the N wire-electrode cutting in figure 12 during complete profile plate.

FIG. 14: for the utility model provides a profile plate and another profile plate when along the profile plate concatenation behind the M wire-electrode cutting in figure 12 when complete profile plate.

FIG. 15: for the utility model provides a profile plate and another profile plate when along the profile plate concatenation behind the L linear cutting in figure 12 schematic diagram that is complete.

The reference numbers illustrate:

1. a top frame; 11. a stringer; 12. a first cross member; 13. a second cross member; 14. a third cross member; 141. a wire inlet hole; 15. a first load beam; 16. a second load-bearing beam; 17. a hanging seat; 18. a wiring bracket; 19. reinforcing ribs;

2. a bottom panel;

3. a first side plate; 31. a first opening; 32. a wire inlet;

4. a second side plate;

5. a middle partition plate;

6. a first clean room; 61. a back plate; 62. a first chamber; 621. a first partition plate; 63. a second chamber; 64. a third chamber; 641. a third partition plate;

7. a dirty chamber; 71. installing a partition plate; 72. a second clean room; 73. a dirty chamber main body; 731. a wind deflector;

81. installing a cavity; 811. mounting holes; 8111. an insertion region; 8112. a limiting region; 82. a structural cavity; 83. binding a wire support frame; 831. a first plate body; 832. a second plate body; 8321. a wire fixing hole; 84. welding a shoulder; 85. a bolt; 851. the bolt head.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 3, the present embodiment provides a box body of a power unit converter suitable for a motor train unit, the box body is rectangular and is installed below a motor train unit body, the box body comprises a top frame 1 and a bottom plate 2 which are horizontally arranged at upper and lower intervals, and a first side plate 3 and a second side plate 4 which are vertically arranged are respectively fixed at two ends of the bottom plate 2 in the length direction.

The middle partition plate 5 is fixedly arranged 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 plate 5 are fixedly connected to the top frame 1, a first clean room 6 is formed between the middle partition plate 5 and the first side plate 3, a dirty room 7 is formed between the middle partition plate 5 and the second side plate 4, and a first chamber 62 and a second chamber 63 which are arranged side by side are at least sequentially arranged in the first clean room 6 along the width direction of the bottom plate 2. The bottom plate 2, the top frame 1, the first side plate 3, the second side plate 4 and the middle partition plate 5 are made of aluminum alloy, the bottom plate 2, the first side plate 3, the second side plate 4 and the middle partition plate 5 are formed by section plates, and a mounting structure for mounting electric appliance parts is formed on each section plate.

Specifically, the longitudinal direction of the first chamber 62 and the second chamber 63 described above coincides with the longitudinal direction of the case. The upper ends and the lower ends of the first side plate 3, the second side plate 4 and the middle partition plate 5 are respectively welded on the top frame 1 and the bottom plate 2, the whole box body is of a cubic frame structure formed by welding an aluminum beam structure and an aluminum plate structure, the aluminum beam structure is used as a main bearing structure of the box body, and the section plate is used as an installation structure of a large-mass electric device; the aluminum plate structure is used as an auxiliary bearing structure and a sealing structure of the box body and is used as an installation structure of a small-mass electric device and a wire harness; when the device is used, the top of the box body is suspended at the bottom of a train body of the motor train unit in a hanging mode, the first clean room 6 is used for installing a traction converter assembly, and the dirty room 7 is used for installing an auxiliary converter assembly and a cooling unit assembly. The size of the whole case is determined according to the structure of the applied motor train unit, and for example, the size of the case is 4690mm × 2390mm × 687 mm.

The box body suitable for the motor train unit is large in size and generally exceeds 4m³In order to ensure the strength and rigidity of the whole box body, the box body is generally welded by adopting steel materials in the prior art, but the whole box body is formed by welding the steel materialsThe weight of (2) is large; in addition, because steel materials are difficult to customize into special structures, in the prior art, more switching structures such as mounting plates and the like are required to be added in the box body made of the steel materials for mounting electric components, so that the structure is more complicated, and the assembly difficulty is further increased due to more electric components mounted in the box body of the motor train unit and more switching structures; furthermore, the arrangement of the adapter structure also affects the direct force transfer of the top frame 1 to the bottom sheet 2.

And the box in this embodiment is through adopting the aluminum alloy material, not only can the weight reduction, makes specific shape simultaneously easily for bottom panel 2, first curb plate 3, second curb plate 4 and middle division board 5 can make the structure of section bar board when adopting the aluminum alloy material, makes whole box adopt the aluminum alloy material to reduce weight simultaneously through the structural design of section bar board and guaranteed the strength requirement, in order to satisfy the requirement of EMUs lightweight.

Meanwhile, as the structure for installing the electric appliance parts is formed on the section plate, the electric appliance parts are not required to be installed by adding the switching structures such as the installation plate, so that the electric appliance parts of the converter of the motor train unit are more convenient to assemble, and the assembling difficulty is reduced. And owing to reduced the setting of switching structure such as mounting panel, also more be favorable to top frame 1 to the direct biography power effect of bottom panel 2, improve the intensity and the stability of box. In addition, divide into first clean room 6 and dirty room 7 with whole box, be equipped with first cavity 62 and second cavity 63 in with first clean room 6 simultaneously, realize the modular structure design for the structure is compacter, and the installation is more convenient.

The specific structure of the profile plate is described below with reference to fig. 4 to 15, specifically as follows:

referring to fig. 4, 5, and 12-15, at least one structural cavity 82 and at least one installation cavity 81 are formed in the profile plate, the structural cavity 82 and the installation cavity 81 extend through the profile plate in the longitudinal direction thereof, and the structural cavity 82 and the installation cavity 81 are arranged in the width direction of the profile plate and are independent from 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 binding wire support frame 83. The mounting cavity 81, the mounting hole 811 and the wire support 83 constitute the above-described mounting structure on the profile plate.

Specifically, a top plate of the structural cavity 82 is formed between the upper surface of the interior of each structural cavity 82 and the upper surface of the profile plate, a bottom plate of the structural cavity 82 is formed between the lower surface of the interior of each structural cavity 82 and the lower surface of the profile plate, a top plate of the installation cavity 81 is formed between the upper surface of the interior of each installation cavity 81 and the upper surface of the profile plate, a bottom plate of the installation cavity 81 is formed between the lower surface of the interior of each installation cavity 81 and the lower surface of the profile plate, and a partition wall is formed between each two adjacent cavities (which may be each two adjacent structural cavities 82, each two adjacent installation cavities 81, or the adjacent structural cavities 82 and the installation cavities 81).

The structural cavities 82 in the profile plates can improve the strength of the profile plates, reduce the weight of the profile plates and reduce the production raw material cost of the profile plates. The installation cavity 81 is used for installing other mechanical parts (such as bolts 85 and screws), when the installation is carried out, each mechanical part can be positioned in the installation cavity 81, only the working part is exposed outside the installation cavity 81, the whole mechanical part does not need to be fixed on the surface of the section plate, the surface cleanness of the section plate is ensured, and the flatness of the box body is improved.

Mechanical parts such as the bolts 85 and the screws can be detachably positioned and installed in the installation cavity 81 through the installation holes 811, so that the installation of other mechanical parts can be conveniently realized, the mechanical parts are detachably arranged, the welding of the section plates can be avoided, and the condition that the properties such as the hardness, the strength and the plasticity of the section plates are reduced due to the welding is avoided. Meanwhile, in the assembling process, the wire harness capable of being used for workers to conveniently fix the functional device is fixed on the binding support frame 83 which is close to the distance or at other proper positions, in addition, the binding support frame 83 and the section plate are also integrally formed and fixed, welding is not needed, and the damage to the section plate caused by welding is avoided.

From this, through set up the structural strength that structural cavity 82 can effectively improve the section bar board in the inside of section bar board to alleviate the weight of section bar board, guaranteed the intensity requirement through the structural design of section bar board when making whole box adopt aluminum alloy material weight reduction, in order to satisfy the light-weighted requirement of EMUs. Simultaneously, through setting up installation die cavity 81 in the inside of section bar board, can conveniently realize the installation of mechanical structure such as bolt 85, screw rod, can directly fix on mounting hole 811 on the section bar board through bolt 85 or screw rod when installing each electrical apparatus part, like this, just no longer need increase switching structure such as mounting panel and install electrical apparatus part, not only simplified the structure of box greatly, improved the plane degree of box, also greatly reduced each electrical apparatus part's the equipment degree of difficulty, make the assembly more convenient.

Further, as shown in fig. 4, 5, 12-15, a plurality of structural cavities 82 and installation cavities 81 are provided, the structural cavities 82 and installation cavities 81 are arranged in the width direction of the profile plate and are independent of each other, each installation cavity 81 is arranged adjacently or at least one structural cavity 82 is provided between every two installation cavities 81, each structural cavity 82 is arranged adjacently or at least one installation cavity 81 is provided between every two structural cavities 82, that is, the structural cavities 82 and installation cavities 81 can be arranged periodically or non-periodically in any order along the direction of the profile plate, so that the structure of the profile plate has flexible and variable characteristics.

Preferably, as shown in fig. 5, 7, 10 and 12-15, the cross section of the installation cavity 81 is a convex structure, the installation hole 811 is opened at a position on the profile plate corresponding to the uppermost end of the convex structure, and referring to fig. 10, the installation cavity 81 is formed in a convex structure, so that the thickness of the opened position of the installation hole 811 can be reduced to facilitate the hole opening operation of the installation hole 811, the thickness of the position where the hole opening edge of the installation hole 811 is engaged with the bolt head 851 of the bolt 85 can be ensured to ensure the strength of the hole opening edge, and the hole opening edge of the installation hole 811 can be prevented from being deformed or broken by the bolt head 851 when a screw located outside the installation cavity 81 is subjected to a force, thereby ensuring the reliable installation of the mechanical component in the installation cavity 81.

Preferably, as shown in fig. 4 and 11, the installation hole 811 includes an insertion region 8111 and a limiting region 8112, a dimension of the insertion region 8111 in the width direction of the profile plate is larger than a dimension of the limiting region 8112 in the width direction of the profile plate, and the limiting region 8112 extends in the length direction of the profile plate, taking the installation bolt 85 as an example, during the installation process, the bolt head 851 is inserted into the installation cavity 81 through the insertion region 8111, then the bolt 85 slides towards the limiting region 8112, after the bolt 85 enters the limiting region 8112, the top plate of the installation cavity 81 at the edge of the limiting region 8112 limits the bolt head 851 inside the installation cavity 81, so that the bolt 85 can only slide back and forth along the length direction of the limiting region 8112 and cannot be removed from the limiting region 8112, the limitation between the bolt 85 and the installation cavity 81 is realized, then the bolt 85 is adjusted to a proper position, finally, a washer is sleeved on the bolt 85 above the profile plate, and a nut is screwed to position the bolt 85, the installation of the bolt 85 is completed.

Preferably, as shown in fig. 4, the mounting holes 811 are provided in pairs, and the limiting regions 8112 of the two mounting holes 811 in each pair are arranged oppositely, that is, the distance between the limiting regions 8112 of the two mounting holes 811 in each pair is smaller than the distance between the insertion regions 8111 of the two mounting holes 811 in each pair, so as to prevent the mechanical parts mounted on the profile plate from sliding and falling out in the length direction of the profile plate.

Preferably, the stopper region 8112 has a straight-line structure extending in the longitudinal direction of the profile plate, and the insertion region 8111 has a circular structure, a hexagonal structure, or a straight-line structure perpendicular to the stopper region 8112, and the shape structure of the stopper region 8112 and the shape structure of the insertion region 8111 are not limited to the above, as long as the stopper region 8112 can prevent the bolt 85 from being separated from the installation cavity 81, and the insertion region 8111 can allow the bolt head 851 of the bolt 85 to be inserted.

Preferably, as shown in fig. 4-7 and 12-15, the longitudinal section of the structural cavity 82 along the width direction of the profile plate is rectangular, trapezoidal, triangular, circular, oval or hexagonal, but the present invention is not limited thereto, and in a state that the longitudinal section of the structural cavity 82 is rectangular, trapezoidal, triangular or hexagonal, a corner on the inner wall of the structural cavity 82 forms a chamfer or a fillet to improve the structural strength of the structural cavity 82.

Further, as shown in fig. 5 and 12 to 15, plate-shaped welding shoulders 84 are integrally connected to both sides of the profile plate in the width direction, the lower surfaces of the welding shoulders 84 are flush with the lower surface of the profile plate, the welding shoulders 84 extend in the length direction of the profile plate, the thickness of the welding shoulders 84 is the same as the thickness of the bottom plate of the installation cavity 81 and the thickness of the bottom plate of the structure cavity 82, and the width of the welding shoulders 84 is the same as the dimension of the installation cavity 81 in the width direction of the profile plate.

Referring to fig. 12-15, the welding shoulder 84 can smoothly achieve the welding connection between the two profile plates, and the welding mode may be one or a combination of friction stir welding, arc welding and laser welding, which is not limited by the present invention; in addition, fig. 13 to 15 respectively show the case of cutting the profile plate along the N line, the case of cutting the profile plate along the M line, and the case of cutting the profile plate along the L line, it can be seen that, when the thickness of the weld shoulder 84 is the same as the thickness of the bottom plate of the installation cavity 81 and the thickness of the bottom plate of the structural cavity 82, and the width of the weld shoulder 84 is the same as the dimension of the installation cavity 81 in the width direction of the profile plate, the edges of the profile plate cut along the L line, the M line, and the N line are completely the same as the edges of the complete profile plate, so that the structural strength of the reduced-width profile plate obtained after cutting can be effectively ensured not to be reduced.

Further, as shown in fig. 4, 5, 9, and 12-15, the wire tying support frame 83 includes a first plate 831 and a second plate 832, both the first plate 831 and the second plate 832 extend along the length direction of the profile plate, the first plate 831 is disposed perpendicular to the upper surface of the profile plate, the lower edge of the first plate 831 is connected to the upper surface of the profile plate, the second plate 832 is disposed parallel to the upper surface of the profile plate, one side edge of the second plate 832 is connected to the upper edge of the first plate 831, and the first plate 831 and the second plate 832 are perpendicular to each other, that is, the wire tying support frame 83 has a structure similar to that of an angle steel, and the second plate 832 is provided with a wire tying hole 8321 for fixing a wire harness of a functional device, wherein the height of the first plate 831 and the width of the second plate 832 can be flexibly adjusted according to actual conditions.

Preferably, as shown in fig. 4, 5, 9, and 12 to 15, the position where the lower edge of the first plate 831 contacts the upper surface of the profile plate is located above the partition wall between the adjacent installation cavity 81 and the structural cavity 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 after the connection between the binding support frame 83 and the profile plate, and prevent the upper surface of the profile plate from being deformed or even broken due to the inclination or pressing of the binding support frame 83 by a force during the process of fixing the wire harness to the binding support frame 83.

Preferably, the installation cavity 81 is filled with a thermal insulation material and/or a noise reduction material; the section plate is made of aluminum alloy; in addition, the profile plate is manufactured by one or a combination of extrusion molding, casting, machining and additive manufacturing.

In summary, compared with the prior art, the advantages of the profile plate in the embodiment are as follows: the section bar plate that this embodiment provided, through set up installation die cavity 81 in its inside, can conveniently realize bolt 85, the installation of mechanical structure such as screw rod, simultaneously can effectively improve the structural strength of section bar plate through setting up structure die cavity 82, and lighten the weight of section bar plate, in addition, structure die cavity 82 can set up less with the width of installation die cavity 81, when needs reach certain width through cutting the concatenation, can conveniently follow between two die cavities (between installation die cavity 81 and structure die cavity 82, between two installation die cavities 81, between two structure die cavities 82) cutting, and with certain cutting part and other monoblock or partial section bar plate welded fastening, satisfy multiple width demand.

In the specific implementation process, the box body can be suitable for high-speed motor train units and low-speed motor train units, wherein the high-speed motor train units refer to motor train units with the speed of more than 300km/h, the general speed of the motor train units is 300-350 km/h, and the low-speed motor train units with the speed of less than 300km/h are adopted.

When the box body is suitable for a high-speed motor train unit, a relatively large number of electrical components are installed, and in order to make the structure more compact and facilitate installation and wiring of the electrical components, the detailed structure of the box body when the box body is suitable for the high-speed motor train unit is shown in fig. 1 to 3, and specifically as follows:

for the top frame 1:

referring to fig. 2, the top frame 1 includes two longitudinal beams 11 arranged in parallel at intervals, and a plurality of first cross beams 12, a plurality of second cross beams 13, and a third cross beam 14 fixed between the two longitudinal beams 11 in a transverse direction, and the beams are welded to each other. One of the first beams 12 is fixed with the middle partition 5, the other first beam 12 is fixed with the second side plate 4, and the other first beams 12 are arranged between the two first beams 12 at intervals. The third cross member 14 is fixed above the first side plate 3, and the plurality of second cross members 13 are fixed at intervals between the two longitudinal members 11 and between the first side plate 3 and the intermediate partition 5.

In practical applications, the third beam 14 has a plurality of wire inlet holes 141, which generally correspond to the first chamber 62 and the second chamber 63, for facilitating wire inlet. In addition, the strength of the first cross member 12 is greater than that of the second cross member 13 (the sectional size of the first cross member 12 is greater than that of the second cross member 13).

Since the weight of the electrical components in the first clean room 6 is relatively light, and the weight of the electrical components in the dirty room 7 is relatively heavy, in order to meet the strength and stability requirements of the whole box body, the strength of the first cross beam 12 is greater than that of the second cross beam 13, and generally, the strength of the first cross beam 12 is preferably 1.5-2 times that of the second cross beam 13. Meanwhile, the second cross beam 13 is low in strength, relatively thin in diameter and small in occupied space, and is more beneficial to area division. In addition, since the weight of the electric components in the dirty compartment 7 is heavy, in order to further increase the strength and stability of the cabinet, a plurality of load beams, such as a first load beam 15 and a second load beam 16 described below, are generally provided at portions of the top frame 1 corresponding to the dirty compartment 7.

In order to facilitate the top of the box body to be suspended at the bottom of the motor train unit body in a hanging manner, a plurality of hanging seats 17 extending outward are arranged in the circumferential direction of the top frame 1, that is, a plurality of hanging seats 17 are arranged on the two longitudinal beams 11, the first cross beam 12 fixed to the second side plate 4 and the third cross beam 14, the specific number of the hanging seats 17 can be determined according to the applicable structure of the motor train unit, for example, 18 hanging seats 17 are arranged in the embodiment as shown in fig. 2. The number of the first cross members 12, the second cross members 13, and the bearing beams is determined according to the function of the electric appliance to be realized, and for example, three first cross members 12 and three second cross members 13 are provided in the present embodiment.

For the first clean room 6:

a third chamber 64 arranged side by side with the second chamber 63 is also arranged in the first clean room 6 along the width direction of the bottom plate 2, and a separate back plate 61 is arranged between each chamber. A plurality of first partition plates 621 and a plurality of third partition plates 641 which are perpendicular to the back plate 61 are respectively arranged in the first chamber 62 and the third chamber 64 at intervals, and the first chamber 62 and the third chamber 64 are respectively 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.

The upper end and the lower end of the two back plates 61 are welded with the top frame 1 and the bottom plate 2 respectively, the third chambers 64 and the first chambers 62 are arranged symmetrically completely and mainly used for installing large electrical components in the traction converter assembly, the first sub-chambers and the third sub-chambers are used for installing a traction control unit, a power module, a contactor and a resonant capacitor in the traction converter assembly respectively, and the second chamber 63 is used for installing a middle capacitor and a resistor module in the traction converter assembly.

Like this, first cavity 62 and third cavity 64 also can play the effect of bearing when playing the equipment electrical components, a plurality of first division boards 621 and a plurality of third division board 641 all weld with the second crossbeam 13 and the bottom panel 2 of top frame 1 simultaneously, setting up of first division board 621 and third division board 641 is divided into a plurality of spatial structure with first cavity 62 and third cavity 64 respectively, modular structure's design has been refined, modular spatial structure both can improve the intensity of structure, still make the equipment more convenient simultaneously, improve the efficiency of equipment electrical components, make the structure compacter.

In the specific implementation process, a square hole is formed in the part, corresponding to the power module in the traction converter assembly, of the back plate 61, a motor frame is arranged at the square hole, so that the power module in the traction converter assembly is installed in an auxiliary mode, and meanwhile the square hole plays a role in weight reduction. The first partition plate 621 and the third partition plate 641 respectively close to the first side plate 3 in the first chamber 62 and the third chamber 64 mainly play a role in supporting and bearing, and these two partition plates are generally not provided with lightening holes, while the rest of the first partition plate 621 and the rest of the third partition plate 641 are generally provided with a plurality of lightening holes, so that the effect of lightening is achieved, and meanwhile, the control line arrangement and better transmission effect are facilitated.

In practical applications, the number of the first dividing plates 621 and the third dividing plates 641 may be selected according to the electric functions to be realized, for example, three first dividing plates 621 and three second dividing plates may be arranged as shown in fig. 1 and fig. 2 to form four first sub-chambers and four third sub-chambers. At this moment, the contactors, the power modules and the resonant capacitors in the traction converter assembly are sequentially installed in the four first sub-cavities along the direction from the first side plate 3 to the middle partition plate 5, the traction control units, the power modules and the resonant capacitors in the traction converter assembly are sequentially installed in the four third sub-cavities along the direction from the first side plate 3 to the middle partition plate 5, the resistance modules in the second cavity 63 are installed close to the first side plate 3, and the middle capacitors are installed close to the middle partition plate 5, so that the detection and maintenance are facilitated. The installation layout of the electrical components is more convenient for wiring, simplifies the whole structure and is more beneficial to realizing the functions of each electrical component. In addition, for the convenience of wiring, the power module in the auxiliary converter assembly is generally installed in the first sub-chamber or the third sub-chamber near the middle partition 5.

Of course, since the first chamber 62 and the third chamber 64 are completely symmetrical, the electrical components mounted on the two chambers can be reversed. The traction control unit, the contactor, the power module, the resonance capacitor, the intermediate capacitor and the resistance module are all components of the traction converter assembly, the components are all in the prior art, and other electrical components in the traction converter assembly can be installed in any gap while considering convenient wiring.

The electrical components in the first chamber 62 and the third chamber 64 are generally respectively placed into the box body from two sides for disassembly and assembly, and a plurality of first mounting ports are generally formed in the part, corresponding to the second chamber 63, of the bottom plate 2, so that the electrical components in the second chamber 63 can be conveniently disassembled and assembled from the bottom. In addition, still be equipped with a plurality of wiring support 18 on the top frame 1 that first clean room 6 corresponds to make things convenient for the wiring to increase intensity simultaneously more, the specific quantity and the mounted position of wiring support 18 are decided according to actual need, the utility model discloses do not prescribe a limit to this.

From this, to first clean room 6, the cooperation through backplate 61, first division board 621 and third division board 641 divides into a plurality of module spaces with first clean room 6 for the structure is compacter, makes things convenient for the equipment of electrical components more, can also improve the intensity of structure. Meanwhile, each electrical component enters the first chamber 62, the third chamber 64 and the second chamber 63 from the two sides and the bottom of the box body respectively, so that the electrical components are more convenient to disassemble and assemble, and the assembling efficiency is further improved. And the layout mode of each electrical component in each module space is more convenient for wiring, so as to simplify the structure.

For the first side plate 3:

first curb plate 3 is formed by a plurality of foretell section bar plate welding, preferably forms through friction stir welding concatenation to the messenger welds between the back panel and changes the fusion, avoids appearing the gas pocket, guarantees the plane degree. The first side plate 3 is welded to the top frame 1 and the bottom plate 2 at the same time, the portions of the first side plate 3 corresponding to the first cavity 62 and the second cavity 63 are provided with first openings 31, the first openings 31 are provided with door structures, and the first openings 31 are provided with sealing strips for sealing to realize the sealing of the end faces of the box body. The arrangement of the door structure is more convenient for installation and maintenance of the electrical components in the first cavity 62 and the second cavity 63, the door structure is closed after the installation of the common electrical components is finished, and the door structure is opened when maintenance is needed. In addition, a plurality of wire inlets 32 are further provided on the first side plate 3 corresponding to the third chamber 64 for facilitating wire feeding.

For the dirty chamber 7:

an installation partition plate 71 is arranged at one corner in 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 main body 73 which are independent of each other, and the installation partition plate 71 is made of aluminum alloy.

Wherein, the mounting partition plate 71 is generally L-shaped, and is welded with the top frame 1, the bottom plate 2 and the second side plate 4 at the same time, and plays a role in sealing while playing a role in bearing the contactor. The second clean room 72 is used for installing the contactors in the auxiliary converter assembly, and the dirty room body 73 is the main bearing structure of the active large-mass electrical components and is used for installing the transformer and the resonance inductor in the cooling unit assembly and the auxiliary converter assembly. The whole dirty chamber 7 is divided into the second clean chamber 72 at one corner and the dirty chamber main body 73 at the rest part of the dirty chamber 7 by the arrangement of the installation partition plate 71, and the modular structure design is adopted, so that the assembly of the electrical components is facilitated while the structural strength is improved.

In this embodiment, in order to satisfy the cooling effect of each electrical component and to save cost, a water cooling method is adopted for the electrical components (mainly power modules) in the first clean room 6, an air cooling method is adopted for the electrical components (mainly transformers and resonant inductors) in the dirty room 7, and the cooling unit assembly includes a radiator, a current collector, a fan, a water pump and a cooling water pipe. Wherein, the part of the dirty room main body 73 near the middle partition 5 is used for installing a radiator, a current collector, a fan and a water pump, the part of the dirty room main body 73 near the second side plate 4 is used for installing the transformer and the resonance inductor, and a cooling water pipe extends from the dirty room main body 73 to the first clean room 6 to water-cool the power module in the first clean room 6.

Specifically, in order to facilitate the arrangement of the electrical components in the dirty room main body 73 and the air cooling effect of the fan on the electrical components, in practical application, two air baffles 731 with through holes are symmetrically arranged on two sides of the dirty room main body 73 and close to the intermediate partition plate 5, the two air baffles 731 are respectively used for installing a radiator and a current collector in the cooling unit assembly with the space formed by the two sides of the box body, the space between the two air baffles 731 is used for installing the fan and the water pump in the cooling unit assembly, the fan preferably adopts a biaxial centrifugal fan, and the two current collectors are connected with the fan through the through holes in the air baffles 731. Since the heat generation temperature of the transformer is higher than the resonance inductance, a position corresponding to a space between the two wind-blocking plates 731 in a portion of the main body 73 of the dirty room, which is close to the second side plate 4, is generally used for mounting the transformer, and a position close to one side of the cabinet is used for mounting the resonance inductance.

The whole dirty chamber 7 is internally cooled by forced air, when the dirty chamber normally works, the centrifugal fan causes negative pressure in the air duct, natural air is sucked into the radiator from two sides of the box body, the temperature of the natural air is reduced after the heat radiation effect, the natural air is sucked into the fan after the current collector, then the natural air with the reduced temperature is blown to the transformer and the resonance inductor, the temperature of the natural air with the reduced temperature is lower than the heating temperature of the transformer and the resonance inductor, the cooling effect can be performed on heating devices such as the transformer and the resonance inductor, and finally the natural air is discharged out of the box body from the bottom, and the wind direction of the natural air is shown in the arrow direction in fig. 3.

Generally, the contactor in the second clean room 72, the radiator and the current collector in the dirty room main body 73 are respectively arranged at two sides of the corresponding box body for dismounting and subsequent maintenance, a plurality of second mounting ports are formed in the bottom plate 2 corresponding to the part, close to the middle partition plate 5, in the dirty room main body 73, and a plurality of third mounting ports are formed in the bottom plate 2 corresponding to the part, close to the second side plate 4, in the dirty room main body 73, so that the fan, the water pump, the transformer and the resonance inductor can be dismounted and maintained from the bottom.

In order to provide support for the active component fan, so that the fan can work effectively, and meanwhile, the strength and the stability of the box body are improved, a plurality of first bearing beams 15 are arranged on the top frame 1 corresponding to the area between the two wind shields 731, a plurality of second bearing beams 16 are arranged on the top frame 1 corresponding to the area close to the second side plate 4 in the dirty room main body 73, and the second bearing beams 16 are installed on the top frame 1 through bolts so as to ensure that the fan runs more stably.

For the second side plate 4:

the second side plate 4 is formed by welding, preferably by friction stir welding, a plurality of the above-mentioned profile plates. The second side plate 4 is welded to the top frame 1 and the bottom plate 2 at the same time, a plurality of second openings are formed in the part, corresponding to the dirty chamber main body 73, of the second side plate 4, a cover plate is arranged at the second openings, and the second openings are sealed through sealing strips to achieve sealing of the end face of the box body.

The setting of apron is mainly for the convenience of cooling water piping's dismouting, and the apron is in the open mode when the installation condenser tube generally, treats that the condenser tube installation is accomplished the back shroud and is in the closed condition, and the apron will no longer open unless special circumstances. Since the cooling water pipes extend from the second side plate 4 to the end of the first clean room 6, the maintenance inspection operation is generally performed by opening the door structure of the first side plate 3. In addition, the second side plate 4 is further provided with a plurality of wire outlet holes so as to facilitate wire outlet.

For the intermediate partition 5:

the intermediate partition 5 is formed by welding a plurality of the above-described profile plates, preferably by friction stir welding. The middle partition plate 5 is welded on the top frame 1 and the bottom plate 2 at the same time, the whole box body is divided into a dirty chamber 7 and a clean chamber by the middle partition plate 5, the sealing effect is achieved, and meanwhile the force of the top frame 1 can be better transmitted to the bottom plate 2 in the operation process. There are clear sealing performance requirements for the frames of the first clean room 6 and the second clean room 72, and no clear sealing performance requirements for the frame of the dirty room body 73.

For the bottom sheet 2:

bottom panel 2 is formed by the welding of a plurality of foretell section bar boards, preferably forms through the friction stir welding concatenation, and each electrical apparatus part can be in the mounting hole on the section bar board in bottom panel 2 through the bolt snap-on, and is simple and convenient. A plurality of first mounting ports are formed in the bottom plate 2 corresponding to the second chamber 63, a plurality of second mounting ports are formed in the bottom plate 2 corresponding to the portion of the dirty chamber main body 73 close to the intermediate partition 5, and a plurality of third mounting ports are formed in the bottom plate 2 corresponding to the portion of the dirty chamber main body 73 close to the second side plate. All be equipped with the door structure and seal through the sealing strip in first installing port, second installing port and third installing port department, and the structural a plurality of exhaust vents of having seted up of door that the third installing port corresponds to in the air-out.

The first mounting port, the second mounting port and the third mounting port which are partially corresponding between the two wind deflectors 731 are mainly used for facilitating the disassembly and assembly and later maintenance of corresponding electrical components in each cavity from the bottom; the second mounting openings corresponding to the spaces formed by the two wind deflectors 731 and the two sides of the box body are mainly used for facilitating later maintenance of the radiator and the current collector. Of course, when each electrical component is mounted, the electrical component and each adjacent plate member are fixed by bolts as necessary.

Further, in order to ensure the sealing performance of the whole first clean room and the second clean room and better protect the whole box body, the top of the top frame 1 is covered with a top aluminum plate in a sealing manner, two sides of the box body corresponding to the first sub-room and the third sub-room are respectively provided with a door structure and sealed through sealing strips, and two sides of the box body corresponding to the second clean room 72 and the dirty room main body 73 and the part close to the second side plate 4 are respectively provided with a door structure and sealed through sealing strips. The parts of the two sides of the box body corresponding to the dirty room main body 73 and close to the middle partition plate 5 are opened to be used as air inlets.

In addition, in practical application, the reinforcing ribs 19 are further arranged on the front side and the rear side of the bottom plate 2 along the length direction, the box body reinforcing function can be achieved, meanwhile, the bottom plate 2 can be used for the compression joint of a motor train unit body frame with a sealing strip, the bottom plate 2, the first side plate 3, the second side plate 4, the top aluminum plate and the door structures are enclosed to form a closed box-shaped structure, the overall rigidity of the box body is effectively improved, the deformation of the box body is effectively controlled, gravity transmitted by the center of mass of the converter can be smoothly transmitted to an underframe of a motor train unit body through a suspension structure, and an obvious stress weak area is not formed.

The whole box body is made of aluminum alloy, that is, the top frame 1, the bottom plate 2, the first side plate 3, the second side plate 4, the middle partition plate 5, the back plate 61, the first partition plate 621, the third partition plate 641, the installation partition plate 71, the wind shield 731, the door structures and other components are made of aluminum alloy.

In conclusion, the box body in the embodiment is made of aluminum alloy, the strength of the box body is guaranteed while the weight of the box body is reduced through structural matching of the section plates, the strength and the stability of the whole box body are further guaranteed through mutual matching of the first cross beam 12 and the second cross beam 13, lightening holes formed in part of partition plates and bearing beams, and the requirement of light weight of the motor train unit is met, and the weight of the box body in the embodiment is reduced by about 20% compared with that of a steel structure box body with the same volume. Part panel of whole box adopts the section bar board and the box adopts modular structural design simultaneously for the manufacturing of box is easier, and it is more convenient to assemble electrical components, and the plane degree of box will be higher than the steel construction box simultaneously. And each electrical apparatus part can be followed both sides and the bottom of box respectively and carried out the dismouting for it is more convenient to operate, has further improved the packaging efficiency.

In addition, according to the installation overall arrangement of each electrical apparatus part listed above, more convenient in the wiring for after the inlet wire from the automobile body of EMUs, nearest from the resistance module, walk the one end inlet wire that the box is close to first curb plate 3 after and walk the line round and finally go out by the other end that the box is close to second curb plate 4, every bent angle all is in between 90 ~ 180 degrees when can guaranteeing the wiring, and then more is favorable to realizing the function of each electrical apparatus part.

In addition, when the housing is suitable for a low-speed motor train unit, because fewer electrical components are required (mainly, the number of capacitors is reduced) compared to a high-speed motor train unit, only one back plate 61 needs to be disposed in the first clean room 6 to be divided into the first chamber 62 and the second chamber 63, and the third chamber 64 does not need to be disposed. In addition, the second clean room 72 can be separated at one corner of the dirty room 7 by the installation partition plate 71 in the above-mentioned manner, and 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. The frame where the contactor is located can be adjusted adaptively according to the position where the contactor is placed. This layout also facilitates routing. The rest structures are the same as those suitable for the high-speed motor train unit, and are not described in detail herein.

The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims (12)

1. A box body of a power unit converter suitable for a motor train unit is in a rectangular shape and is arranged below a motor train unit body and is characterized in that,

the box body comprises a top frame and a bottom plate which are horizontally arranged at an upper interval and a lower interval, and a first side plate and a second side plate which are vertically arranged are respectively fixed at two ends of the bottom plate in the length direction;

an intermediate partition plate is fixedly arranged between the first side plate and the second side plate along the width direction of the bottom plate, the tops of the first side plate, the second side plate and the intermediate partition plate are fixedly connected to the top frame, a first clean room is formed between the intermediate partition plate and the first side plate, a dirty room is formed between the intermediate partition plate and the second side plate, and a first chamber and a second chamber which are arranged side by side are at least sequentially arranged in the first clean room along the width direction of the bottom plate;

the bottom plate, the top frame, the first side plate, the second side plate and the middle partition plate are made of aluminum alloy, the bottom plate, the first side plate, the second side plate and the middle partition plate are made of profile plates, and the installation structure for installing the electric appliance parts is formed on the profile plates.

2. The case of power unit converter for motor train units as claimed in claim 1,

at least one structural cavity and at least one installation cavity are formed in the section plate, the structural cavities and the installation cavities extend in a penetrating manner along the length direction of the section plate, and the structural cavities and the installation cavities are arranged in the width direction of the section plate and are mutually independent;

the top of the installation cavity is provided with at least one installation hole penetrating through the upper surface of the section plate, at least one binding support frame is arranged on the upper surface of the section plate, and the installation cavity, the installation hole and the binding support frame form an installation structure on the section plate.

3. The case of power unit converter for motor train units as claimed in claim 1,

the top frame comprises two longitudinal beams arranged in parallel at intervals, and a plurality of first cross beams, a plurality of second cross beams and a third cross beam which are transversely fixed between the two longitudinal beams;

one of the first cross beams is fixed with the middle partition plate, the other first cross beam is fixed with the second side plate, and the other first cross beams are arranged between the two first cross beams at intervals;

the third cross beam is fixed above the first side plate, and the second cross beams are fixed between the two longitudinal beams at intervals and are positioned between the first side plate and the middle partition plate.

4. The case of power unit converter for motor train units according to claim 3,

the strength of the first cross beam is greater than that of the second cross beam, and the third cross beam is provided with a plurality of wire inlet holes.

5. The case of power unit converter for motor train units as claimed in claim 1,

a third chamber arranged in parallel with the second chamber is further arranged in the first clean chamber along the width direction of the bottom plate, and a separated back plate is arranged between each two chambers;

the first chamber with separate respectively in the third chamber be equipped with a plurality of first division boards and a plurality of third division board that the backplate set up perpendicularly, a plurality of first division boards and a plurality of third division board will respectively first chamber and third chamber are cut apart into a plurality of first subchambers and a plurality of third subchambers.

6. The case of power unit converter for motor train units as claimed in claim 1,

the first side plate is provided with a first opening corresponding to the first cavity and the second cavity, a door structure is arranged at the first opening, and the first opening is sealed through a sealing strip.

7. The case of power unit converter for motor train units according to claim 5,

and an installation partition plate is arranged at one corner of the dirty chamber and close to the second side plate so as to divide the dirty chamber into a second clean chamber and a dirty chamber main body which are independent of each other, and the installation partition plate is made of aluminum alloy.

8. The case of power unit converter for motor train units according to claim 7,

two wind shields with through holes are symmetrically arranged on two sides of the dirty chamber main body and close to the middle partition plate.

9. The case of power unit converter for motor train units according to claim 8,

a plurality of first mounting ports are formed in the part, corresponding to the second cavity, of the bottom plate, a plurality of second mounting ports are formed in the part, corresponding to the part, close to the middle partition plate, in the dirty chamber main body, of the bottom plate, and a plurality of third mounting ports are formed in the part, corresponding to the part, close to the second side plate, in the dirty chamber main body, of the bottom plate;

first installing port, second installing port and third installing port department all are equipped with the door structure and seal through the sealing strip, just a plurality of exhaust vents have been seted up to the door structure that the third installing port corresponds.

10. The case of power unit converter for motor train units according to claim 9,

the top of the top frame is covered with a top aluminum plate in a sealing manner, and two sides of the box body corresponding to the first sub-chamber and the third sub-chamber are respectively provided with a door structure and sealed through sealing strips;

and door structures are arranged on the two sides of the box body corresponding to the second clean room and the dirty room main body and close to the second side plate, and the parts are sealed through sealing strips.

11. The case of power unit converter for motor train units according to claim 7,

the part of the second side plate corresponding to the dirty chamber main body is provided with a plurality of second openings, the second openings are provided with cover plates, and the second openings are sealed through sealing strips.

12. The case of power unit converter for motor train units as claimed in claim 1,

and a plurality of bearing beams are arranged on the top frame part corresponding to the dirty chamber.

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