Transformer box body structure with separation structure, vehicle-mounted transformer and railway vehicle

Abstract

The invention provides a transformer box body structure with a separation structure, a vehicle-mounted transformer and a railway vehicle. The box body structure is used for being installed on the outer side of a vehicle, a transformer coil structure is arranged in the box body structure, and a first separation structure and a second separation structure are arranged in the box body structure; a transformer coil structure is contained in a space defined by the first partition structure, the second partition structure, the box body structure and the box body wall. The cooling liquid in the coil cavity is used for being in contact with a coil in the transformer coil structure; the coil cavity is communicated with the liquid inlet accommodating cavity through a through hole formed in the first separation structure; the coil cavity is communicated with the connecting cavity through a through hole formed in the second separation structure; each of the first separation structure and the second separation structure comprises a baffle fixedly connected with the box body structure and an annular sealing structure, a gap is formed between the baffle and the box body structure, and the annular sealing structure is connected with the corresponding baffle.

Description

Technical Field

[0001] The invention relates to a transformer box structure with a partition structure, and in particular to a transformer box structure for being installed on a rail vehicle, an on-board transformer and a rail vehicle. Background Art

[0002] The traction transformer for rail transit vehicles is installed on the train and is used to convert high voltage electricity (such as 25kV voltage of the contact network) into various low voltage electricity required by the traction system and auxiliary systems. It is the power source of the rail vehicle and the core and key component of the traction system.

[0003] With the increasing requirements of countries around the world for low energy consumption of electrical equipment, the rapid development of rail transit and the increasing demand for riding comfort and safety, it is becoming increasingly important to develop green, economical, environmentally friendly, safe and reliable rail transit components with lower noise, higher efficiency, lower component drive power consumption, less maintenance and fewer components and controls.

[0004] Existing rail transit vehicle traction transformers usually use cooling fans to force ventilation. The traction transformer cooling system usually includes filters, coolers, fans and motors. During operation, the cooling fan impeller rotates under the drive of the motor, forcing the cooling air to flow through the filter and cooler in turn. Figure 1 As shown, the coolant of the box structure 10 (also referred to as the traction transformer body) of the traction transformer sequentially passes through the coolant outlet 10A of the box structure 10, the liquid outlet pipe 301, and the cooler liquid inlet 20B to enter the cooler 20, and the coolant (such as transformer oil) performs heat exchange with the cooling air in the cooler. The cooled coolant then sequentially passes through the cooler liquid outlet 20A, the liquid inlet pipe 302, and the coolant inlet 10B to flow back to the traction transformer body oil tank (i.e., the box structure 10), and performs heat exchange among various components in the oil tank, and continues to cool the transformer coil structure 1 and other components, and in this cycle, the traction transformer is cooled.

[0005] The transformer coil structure in the transformer box is generally a two-layer coil or multi-layer coil structure arranged in sequence from the inside to the outside. In order to dissipate the heat of the inner coil, it is necessary to guide the coolant entering from the coolant inlet of the box structure to the cavity formed between the two adjacent layers of coils, and then flow out from the coolant outlet. Therefore, it is necessary to set a baffle near the coolant inlet of the transformer coil structure, and guide the coolant into the cavity formed between the two adjacent layers of coils through the through holes on the baffle.

[0006] However, when a baffle is provided as a partition structure in the inner cavity of the box structure, it is difficult to obtain a baffle that is completely compatible with the inner cavity size of the box due to assembly errors, making it difficult for the processed baffle to achieve effective sealing with each box wall. Summary of the invention

[0007] The problem to be solved by the present invention is that in the box structure of the existing rail transit vehicle traction transformer, the baffles arranged on both sides of the transformer coil structure are difficult to fully adapt to the inner cavity size of the box due to assembly errors, thereby affecting the sealing effect, and a box structure of a vehicle-mounted transformer is provided.

[0008] In order to solve the above technical problem, the present invention provides a box structure with a partition structure for a vehicle-mounted transformer, wherein the box structure (10) is used to be installed outside a vehicle (100), and a transformer coil structure (1) is arranged in the box structure (10). The box structure (10) is provided with a first partition structure (PA1), a second partition structure (PA2), a liquid inlet accommodating cavity (101), and a connecting cavity (103); The space enclosed by the first partition structure (PA1), the second partition structure (PA2) and the box wall of the box structure (10) accommodates the transformer coil structure (1); The transformer coil structure (1) forms a coil cavity (102); the cooling liquid in the coil cavity (102) is used to contact the coil in the transformer coil structure (1); The coil cavity (102) is in corresponding communication with the liquid inlet accommodating cavity (101) via a through hole opened on the first partition structure (PA1) and corresponding to the coil cavity (102); the coil cavity (102) is in corresponding communication with the connecting cavity (103) via a through hole opened on the second partition structure (PA2) and corresponding to the coil cavity (102); Each of the first partition structure (PA1) and the second partition structure (PA2) comprises a baffle plate and an annular sealing structure connected to the baffle plate, the baffle plate is fixedly connected to the box structure (10) and has a gap with the box structure (10), and the annular sealing structure extends from the corresponding baffle plate to the box wall of the box structure (10). That is, the first partition structure comprises a first baffle plate and a first annular sealing structure connected to the first baffle plate, and the second partition structure comprises a second baffle plate and a second annular sealing structure connected to the second baffle plate. The liquid inlet accommodating cavity (101) can be surrounded by the first partition structure (PA1) and the box wall of the box structure (10). The connecting cavity (103) can be surrounded by the second partition structure (PA2) and the box wall of the box structure (10).

[0009] The applicant found during research that when a baffle is provided as a partition structure in the inner cavity of the box structure, due to the existence of assembly error, if a baffle matching the size of the inner cavity of the box is provided, it is difficult for the baffle to achieve good sealing with each box wall. In the present application, a gap is provided between the outer periphery of the baffle and the box wall of the box structure, that is, sealing is achieved by an annular sealing structure extending to the box wall, thereby greatly reducing the requirements for assembly accuracy.

[0010] In the above technical solution, the number of transformer coil structures (1) in the box structure (10) is K, K≥1; the box structure (10) has K coil cavities (102); The space between the outermost coil and the innermost coil of the i-th transformer coil structure (1) forms an i-th coil cavity (102) corresponding to the i-th transformer coil structure (1); 1≤i≤K; Each coil cavity (102) is connected to a cooling liquid inlet (10B) of the box structure (10) via the liquid inlet accommodating cavity (101); Each coil cavity (102) is connected to a cooling liquid outlet (10A) of the box structure (10) via a connecting cavity (103).

[0011] Through the above arrangement, the coolant enters the coil cavity between the outermost coil and the innermost coil to cool the coil, thereby achieving a better cooling effect on the coil.

[0012] The box structure (10) further comprises an outer cavity (104); a cavity wall of the outer cavity (104) away from the coil cavity (102) is a box wall of the box structure (10) and is made of a heat-conducting material; Each coil cavity (102) is connected to the cooling liquid outlet (10A) of the box structure (10) via the connecting cavity (103) and the outer cavity (104) in sequence; When the box structure (10) is installed in a vehicle (100), the outer cavity (104) is located on the side of the coil cavity (102) away from the vehicle (100). The box wall of the box structure may be made of heat-conducting material.

[0013] In the present invention, the heat of the coolant in the outer cavity is transferred to the box wall, and the box wall exchanges heat with the outside air, thereby achieving cooling of the coolant. According to the above technical solution, the coolant entering the box structure through the coolant inlet first passes through the coil cavity to cool the coil. Since the box wall of the outer cavity is the box wall of the box structure, the outer cavity can play a role in cooling the coolant, so that the coolant that absorbs the heat of the coil is cooled in the outer cavity, and then flows out of the box structure through the coolant outlet. In this way, the cooling of the coolant can be achieved in the box structure. Through the above technical scheme of the present invention: (a) since the coolant can be cooled inside the box structure, it is possible to choose not to set up an additional cooling system outside the box structure, thereby simplifying the structure of the entire on-board transformer, reducing noise, reducing power consumption, reducing maintenance costs, and reducing the probability of failure; (b) it is also possible to choose to set up an additional cooling system outside the box structure. Since the coolant can be cooled inside the box structure, the heat dissipation power demand of the cooling system outside the box structure is reduced, thereby reducing the aerodynamic noise of the fan, reducing the power consumed by the fan, and reducing the maintenance workload and maintenance costs.

[0014] Preferably, when the box structure (10) is installed on the top / bottom of a vehicle (100), the cavity wall of the outer cavity (104) away from the coil cavity (102) is the bottom wall / top wall of the box structure (10).

[0015] Through the above arrangement, when the vehicle is moving, a relatively strong running wind can be generated on the side of the cavity wall of the outer cavity (104) away from the coil cavity (102), thereby achieving a good cooling effect on the cavity wall.

[0016] In the above technical solution, a third partition structure (PA3) is further provided in the box structure (10); The first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3), and the box wall of the box structure (10) form a first space, wherein each transformer coil structure (1) is accommodated in the first space; The outermost coil, the innermost coil, the first partition structure (PA1) and the second partition structure (PA2) of each transformer coil structure (1) form a coil cavity (102) corresponding to the transformer coil structure (1); A second space enclosed by the first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3), and the box wall of the box structure (10) is the outer cavity (104); The second partition structure (PA2) is also provided with a through hole for connecting the connecting cavity (103) with the outer cavity (104).

[0017] By setting up a partition structure, the inner cavity of the box structure is divided into multiple cavities, so that the coolant entering the box structure passes through the liquid inlet containing cavity, the coil cavity, the connecting cavity, and the outer cavity in the box structure in sequence, so that the coolant can be forced to circulate through the outer cavity to achieve a better cooling effect.

[0018] Preferably, the outlet of the outer cavity (104) is located close to the first partition structure (PA1). Furthermore, the annular sealing structure is made of a hard and bendable material.

[0019] Through the above arrangement, since the annular sealing structure is bendable, the annular sealing structure can be connected to the baffle and abut against the box wall, thereby playing a sealing role. The annular sealing structure can be made of paper material.

[0020] Preferably, the material has a hardness of at least 70 HD and an elongation of at least 15%. For example, in this embodiment, the material may be NOMEX paperboard.

[0021] In a preferred technical solution, the annular sealing structure comprises extension parts which are connected to each other to form the annular sealing structure, the extension parts extending from the baffle to the corresponding box wall, the extension parts being the same in number as the box wall of the box structure (10) and being arranged correspondingly.

[0022] Preferably, each extension part is hinged to the baffle, and the extension part is connected to the corresponding box wall through a soft sealing material, and the soft sealing material is installed on the box wall or arranged on the end of the extension part.

[0023] Through the above arrangement, the rotatable extension part is connected to the corresponding box wall through the soft sealing material, thereby achieving better sealing with the box wall.

[0024] In another preferred embodiment, the annular sealing structure extends into the mounting groove of the baffle plate, thereby connecting with the baffle plate. That is, the first annular sealing structure extends into the first mounting groove of the first baffle plate, thereby connecting with the first baffle plate; the second annular sealing structure extends into the second mounting groove of the second baffle plate, thereby connecting with the second baffle plate.

[0025] In the above technical solution, the first partition structure (PA1) further comprises a first position-limiting member (21) fixedly connected to the box structure (10); the second partition structure (PA2) further comprises a second position-limiting member (22) fixedly connected to the box structure (10); The first limiting member (21) and the second limiting member (22) are arranged correspondingly, the first limiting member (21) and the second limiting member (22) are respectively located on both sides of the transformer coil structure (1), the first limiting member (21) and the corresponding second limiting member (22) are fixedly connected via a connecting rod (5); there is a gap between the first limiting member (21) and the box wall of the box structure (10), and there is a gap between the second limiting member (22) and the box wall of the box structure (10); The connecting rod (5) is connected to a baffle plate (i.e., a first baffle plate) of the first partition structure (PA1) and a baffle plate (i.e., a second baffle plate) of the second partition structure (PA2); The baffle of the first partition structure (PA1) is located between the first limiting member (21) and the transformer coil structure (1); The baffle of the second partition structure (PA2) is located between the second limiting member (22) and the transformer coil structure (1).

[0026] The first limiting member (21) and the second limiting member (22) respectively abut against the baffle of the first partition structure (PA1) and the baffle of the second partition structure (PA2), thereby clamping the transformer coil structure (1) between the baffle of the first partition structure (PA1) and the baffle of the second partition structure (PA2).

[0027] In the present invention, a stable structure is formed by the first limiter, the second limiter and the connecting rod. The first limiter (21) and the second limiter (22) respectively abut against corresponding baffles (31), thereby clamping the transformer coil structure (1) between the baffles, thereby ensuring the stability of various components in the box structure when the vehicle is running.

[0028] In the above technical solution, a third partition structure (PA3) is further provided in the box structure (10); the first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3) and the box wall of the box structure (10) enclose a first space, wherein the first space accommodates each transformer coil structure (1); the outermost coil and the innermost coil of each transformer coil structure (1) and the first partition structure (PA1) and the second partition structure (PA2) enclose a coil cavity (102) corresponding to the transformer coil structure (1); the second space enclosed by the first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3) and the box wall of the box structure (10) is the outer cavity (104); the second partition structure (PA2) is also provided with a through hole for connecting the connecting cavity (103) with the outer cavity (104); the first limiting member (21) and the corresponding second limiting member (22) are fixedly connected by at least two connecting rods (5) arranged at intervals; the third partition structure (PA3) comprises a sheet-like sealing structure (63); the sheet-like sealing structure (63) is installed on the connecting rod (5) by means of a first clamping member (41) and a second clamping member (42) arranged corresponding to the connecting rod (5); the connecting rod (5) and the sheet-like sealing structure (63) are clamped by the corresponding first clamping member (41) and the second clamping member (42); the first partition structure (PA1), the second partition structure (PA2) and the box wall of the box structure (10) are all sealedly connected to the sheet-like sealing structure (63).

[0029] In the present invention, the sheet-like sealing structure can be installed on the connecting rod by means of the first clamping member and the second clamping member which are arranged corresponding to the connecting rod. For example, the sheet-like sealing structure covers the connecting rod, and the sheet-like sealing structure and the connecting rod are clamped by the first clamping member and the second clamping member, so as to clamp and fix the sheet-like sealing structure.

[0030] In a preferred technical solution, the sheet-like sealing structure (63) is a hard and bendable material. More preferably, the hardness of the material is at least 70HD and the elongation is at least 15%. For example, in this embodiment, the material may be NOMEX cardboard.

[0031] In a preferred technical solution, the distance between the axis of each connecting rod (5) and the axis of the transformer coil structure (1) in the height direction of the box structure (10) is smaller than the outer diameter of the transformer coil structure (1), so that in the height direction of the box structure (10), the height difference between the height at which at least part of the sheet-like sealing structure (63) is located and the height at which the axis of the transformer coil structure (1) is located is smaller than the outer diameter of the transformer coil structure (1).

[0032] The applicant has found during research that the larger the capacity of the outer cavity, the better the heat dissipation effect of the coolant. However, if the size of the entire transformer box structure is increased in order to increase the volume of the outer cavity, it is not conducive to the arrangement and miniaturization of the box structure on the outside of the vehicle. Through the arrangement of the above preferred technical solution, for example, when the box structure is installed at the bottom of the vehicle, at least part of the sheet-like sealing structure (63) is higher than the lowest end of the transformer coil structure, that is, at least part of the space around the transformer coil structure is also used as part of the outer cavity (104), and the inner cavity capacity of the outer cavity is increased as much as possible, thereby being more conducive to the heat dissipation effect of the coolant.

[0033] In the above technical solution, the annular sealing structure (i.e., the first annular sealing structure) of the first separation structure (PA1) as a whole forms a concave structure facing the liquid inlet accommodating cavity (101).

[0034] Through the above arrangement, the surface of each first extension part forms a slope. When the cooling liquid in the liquid inlet accommodating cavity moves toward the coil cavity, the cooling liquid in the liquid inlet accommodating cavity will also form liquid pressure on the first extension parts of the first annular sealing structure, so that each first extension part has a better sealing effect with the box wall.

[0035] In the above technical solution, the annular sealing structure (i.e., the second annular sealing structure) of the second separation structure (PA2) as a whole forms a concave structure facing the connecting cavity (103).

[0036] Through the above arrangement, the surface of each first extension part forms a slope. When the cooling liquid in the liquid inlet accommodating cavity moves toward the coil cavity, the cooling liquid in the liquid inlet accommodating cavity will also form liquid pressure on the first extension parts of the first annular sealing structure, so that each first extension part has a better sealing effect with the box wall.

[0037] In the above technical solution, the outlet position of the outer cavity (104) is close to the first partition structure (PA1).

[0038] Through the above arrangement, the outer cavity can have a larger capacity, which is beneficial to the heat dissipation of the coolant in the outer cavity.

[0039] According to the same inventive concept, the present invention also provides a vehicle-mounted transformer, comprising the box structure described in any one of the above items.

[0040] In a preferred technical solution, the on-board transformer further comprises a pump (30), and an inlet and an outlet of the pump (30) are respectively connected to a coolant outlet (10A) and a coolant inlet (10B).

[0041] Through the above arrangement, the cooling system additionally arranged outside the box structure in the prior art can be eliminated, so that the layout and control are simplified, the probability of failure is reduced, the reliability of the vehicle and the on-board transformer is improved, and the full life cycle cost of the on-board transformer is greatly reduced. The on-board transformer of the present invention can be a traction transformer.

[0042] In another preferred technical solution, the on-board transformer further comprises a cooler (20), the cooler (20) having a cooler liquid inlet (20B) and a cooler liquid outlet (20A); the cooler liquid outlet (20A) is communicated with a coolant inlet (10B) of the box structure (10), and the cooler liquid inlet (20B) is connected to a coolant outlet (10A) of the box structure (10).

[0043] Through the above arrangement, the outer cavity formed in the box structure and the cooler outside the box structure are used to cool the coolant together, so compared with the prior art in which only a cooler is arranged outside the box structure, a better cooling effect on the coolant can be achieved.

[0044] In a more preferred technical solution, there are at least two coolers (20), and the cooler liquid outlet (20A) corresponding to each cooler (20) is communicated with the coolant inlet (10B) of the box structure (10), and the cooler liquid inlet (20B) corresponding to each cooler (20) is connected to the coolant outlet (10A) of the box structure (10).

[0045] Based on the same inventive concept, the present invention also provides a rail vehicle, comprising the above-mentioned on-board transformer.

[0046] The advantages and positive effects of the present invention are as follows: the box structure of a vehicle-mounted transformer proposed by the present invention is suitable for vehicle-mounted transformers in rail transit, such as traction transformers arranged at the bottom or roof of a vehicle. The present invention combines the internal structural characteristics of the transformer, conducts innovative design of the cooling liquid path and cooling structure, forces the cooling liquid to flow through the outer cavity of the box structure away from the vehicle, and makes full use of the running wind passing through the transformer when the vehicle is running to achieve cooling of the transformer. The vehicle-mounted transformer of the present invention has the advantages of small size, light weight, low noise, easy maintenance, and low life cycle cost, and is particularly suitable for vehicle-mounted transformers with lightweight, miniaturization, and high reliability requirements. When a cooler is not provided on the outside of the box structure, the forced ventilation cooling fan can be cancelled, the transformer noise can be greatly reduced (for example, it can be reduced by >15dB(A)), there is no consumption of fan drive power, there is no need to overhaul and maintain the fan and replace the bearing, the cleaning cycle of the cooler is extended, the overhaul and maintenance operations are greatly reduced, the filter, the original fan protection device and control logic on the train can be cancelled, the whole vehicle layout and control can be simplified, the probability of failure is reduced, the reliability of the whole vehicle and the traction transformer is improved, and the whole life cycle cost of the transformer is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0048] Figure 1 It is a connection structure between the box structure of the traction transformer and the cooler in the existing rail vehicle; Figure 2 is a top view (seen along the height direction of the vehicle) of the connection between the box structure and the pump of Example 1 of the present invention, wherein the internal structure of the box structure is shown; Figure 3 is a front view of the box structure of Example 1 of the present invention (seen along the length direction of the vehicle), wherein a pump connected to the box structure is shown in dotted line form; Figure 4 yes Figure 3 Schematic diagram of the box structure and vehicle connection; Figure 4A yes Figure 4 A schematic diagram of a first structure of a first extension portion sealed and connected to the top wall of the box structure; Figure 4B yes Figure 4 A schematic diagram of a second structure of the first extension portion which is sealed and connected to the top wall of the box structure; Figure 4C yes Figure 4 A third structural schematic diagram of the first extension portion sealed and connected to the top wall of the box structure; Figure 4D yes Figure 4 A fourth structural schematic diagram of the first extension portion in sealing connection with the top wall of the box structure; Figure 5 is a side view of the box structure of Embodiment 1 of the present invention viewed from a side of the first partition structure away from the transformer coil structure (seen along the vehicle width direction), wherein the transformer coil structure obscured by the first partition structure is indicated in dotted line form; Figure 6 is a side view of the box structure of Embodiment 1 of the present invention viewed from a side of the second partition structure away from the transformer coil structure, wherein the transformer coil structure blocked by the second partition structure is indicated in dotted line form; Figure 7 is a side view of the box structure after the second partition structure is removed according to Example 1 of the present invention; Figure 8 yes Figure 7 A magnified schematic diagram of the middle M part; Fig. 9 is a top view of the box structure of Example 2 of the present invention connected to the cooler via a pump; Fig.10 is a top view of a box structure of Embodiment 3 of the present invention connected to two coolers via a pump; In the above drawings: Vehicle 100; Box structure 10; transformer coil structure 1; coil structure outer wall 1W; coil structure inner wall 1N; first stopper 21; second stopper 22; stopper connector 2A; first baffle 31; second baffle 32; first clamp 41; second clamp 42; clamp fastener 4A; connecting rod 5; first annular sealing structure 61; first extension part 61A; first section 61A1; second section 61A2; third section 61A3; second annular sealing structure 62; second extension part 62A; sheet-like sealing structure 63; sealing structure Fixing member 64; first through hole 81; second through hole 82; third through hole 83; fourth through hole 84; fifth through hole 85; liquid inlet accommodating cavity 101; coil cavity 102; connecting cavity 103; outer cavity 104; coil structure outer cavity 105; cooling liquid outlet 10A; cooling liquid inlet 10B; first partition structure PA1; second partition structure PA2; third partition structure PA3; box structure top wall 10S1; box structure bottom wall 10S2; box structure first side wall 10S3; box structure second bottom wall 10S4; Cooler 20; cooler liquid inlet 20B; cooler liquid outlet 20A.

[0049] Pump 30; Liquid outlet pipe 301; first liquid outlet branch pipe 301A; second liquid outlet branch pipe 301B; Liquid inlet pipe 302; first liquid inlet branch pipe 302A; second liquid inlet branch pipe 302B; xx represents the length direction of the vehicle; yy represents the width direction of the vehicle; zz represents the height direction of the vehicle. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] Example 1 like Figure 2-Figure 8As shown, the present invention provides a box structure of a vehicle-mounted transformer, wherein the box structure 10 is used to be installed outside a vehicle 100 , and a transformer coil structure 1 is disposed in the box structure 10 .

[0052] like Figure 3 As shown, at least one box wall of the box structure 10 is made of heat-conducting material. The box structure 10 has a coil cavity 102, a liquid inlet accommodating cavity 101, and a connecting cavity 103. Preferably, the box structure 10 also has an outer cavity 104. The coil cavity 102 is formed in a space accommodating the transformer coil structure 1, and the coolant in the coil cavity 102 is used to contact the coil in the transformer coil structure 1. The coolant inlet 10B of the box structure 10 is connected to the coolant outlet 10A of the box structure 10 through the coil cavity 102 and the outer cavity 104 in sequence. When the box structure 10 is installed in the vehicle 100, the outer cavity 104 is located on the side of the coil cavity 102 away from the vehicle 100. The material of the box wall is a heat-conducting material.

[0053] In this embodiment 1, the box walls of the box structure 10 are respectively the box structure top wall 10S1, the box structure bottom wall 10S2, the box structure first side wall 10S3, and the box structure second bottom wall 10S4. The vehicle transformer is installed at the bottom of the vehicle 100. Therefore, the box structure bottom wall 10S2 is the cavity wall of the outer cavity 104 away from the coil cavity 102, such as Figure 4 If the vehicle transformer is installed on the top of the vehicle 100, the cavity wall of the outer cavity 104 away from the coil cavity 102 is the top wall 10S1 of the box structure.

[0054] The number of transformer coil structures 1 in the box structure 10 is K, where K≥1. The box structure 10 has K coil cavities 102. Figure 5-Figure 7 As shown, in this embodiment, K=2. In this embodiment, the axis of the transformer coil structure 1 is parallel to the vehicle width direction yy.

[0055] The space between the outermost coil and the innermost coil of the i-th transformer coil structure 1 forms the i-th coil cavity 102 corresponding to the i-th transformer coil structure 1. The i-th coil cavity 102 corresponding to the i-th transformer coil structure 1 may include various cavities formed in the i-th transformer coil structure 1, such as the cavity formed between the inner coil and the outer coil, such as the cavity formed between the inner multilayer coil and the outer multilayer coil. 1≤i≤K.

[0056] like Figure 2-Figure 4As shown, each coil cavity 102 is connected to the cooling liquid inlet 10B of the box structure 10 through the liquid inlet accommodating cavity 101. Each coil cavity 102 is connected to the cooling liquid outlet 10A of the box structure 10 through the connecting cavity 103 and the outer cavity 104.

[0057] The box structure 10 is provided with a first partition structure PA1, a second partition structure PA2, and a third partition structure PA3.

[0058] The first partition structure PA1, the second partition structure PA2, the third partition structure PA3, and the box wall of the box structure 10 form a first space, and the first space accommodates each transformer coil structure 1 therein.

[0059] The outermost coil and the innermost coil of the i-th transformer coil structure 1 , the first partition structure PA1 , and the second partition structure PA2 form a coil cavity 102 corresponding to the i-th transformer coil structure 1 .

[0060] A second space surrounded by the first partition structure PA1 , the second partition structure PA2 , the third partition structure PA3 , and the box wall of the box structure 10 is the outer cavity 104 .

[0061] The coil cavity 102 is connected to the liquid inlet accommodating cavity 101 through a through hole corresponding to the coil cavity 102 opened on the first separation structure PA1.

[0062] The coil cavity 102 is connected to the connecting cavity 103 via a through hole corresponding to the coil cavity 102 opened on the second partition structure PA2. The second partition structure PA2 is also provided with a through hole for connecting the connecting cavity 103 with the outer cavity 104.

[0063] The transformer coil structure 1 may be a multi-layer coil structure arranged sequentially from the inside to the outside, that is, the transformer coil structure 1 forms a ring structure as a whole.

[0064] The first partition structure PA1 includes a first baffle 31 fixedly connected to the box structure 10 and a first annular sealing structure 61 correspondingly connected to the first baffle 31. There is a gap between the first baffle 31 and the box wall of the box structure 10, and the first annular sealing structure 61 extends from the first baffle 31 to the box wall of the box structure 10.

[0065] The first partition structure PA1 also includes first extension parts 61A, which are the same in number as the box walls of the box structure 10 and are arranged correspondingly, and the first extension parts 61A are connected to the first baffle 31 and extend from the first baffle 31 to the corresponding box wall, and the first extension parts 61A are connected to each other to form a first annular sealing structure 61. The first extension parts 61A can be further sealed by, for example, sealant, or the first extension parts 61A are an integrated structure.

[0066] Preferably, the first extension portion 61A is made of a hard and bendable first material, and the hardness of the first material is at least 70HD and the elongation is at least 15%.

[0067] In the first form in which the first annular sealing structure 61 is connected to the first baffle plate 31 , the first annular sealing structure 61 extends into the first mounting groove formed in the first baffle plate 31 , thereby being connected to the corresponding first baffle plate 31 .

[0068] In the second form of connection between the first annular sealing structure 61 and the first baffle 31, the first extension part 61A is hinged to the first baffle 31, and the first extension part 61A is connected to the corresponding box wall through a soft sealing material, and the soft sealing material is installed on the box wall or arranged at the end of the first extension part 61A.

[0069] The second partition structure PA2 includes a second baffle plate 32 fixedly connected to the box structure 10 and a second annular sealing structure 62 correspondingly connected to the second baffle plate 32. There is a gap between the second baffle plate 32 and the box wall of the box structure 10, and the second annular sealing structure 62 extends from the second baffle plate 32 to the box wall of the box structure 10.

[0070] The second partition structure PA2 also includes second extension parts 62A which are the same in number as the box walls of the box structure 10 and are arranged correspondingly, the second extension parts 62A are connected to the second baffle plate 32, and extend from the second baffle plate 32 to the corresponding box wall, and the second extension parts 62A are connected to each other to form a second annular sealing structure 62. The second extension parts 62A can be further sealed by, for example, sealant, or the second extension parts 62A are an integral structure.

[0071] Preferably, the second extension portion 62A is a hard and bendable second material, the hardness of the second material is at least 70HD, and the elongation is at least 15%. In this embodiment, the first material and the second material are preferably paper materials that do not chemically react with the coolant, such as NOMEX paperboard.

[0072] In the first form in which the second annular sealing structure 62 is connected to the second baffle plate 32 , the second annular sealing structure 62 extends into the second mounting groove formed in the second baffle plate 32 , thereby being connected to the corresponding second baffle plate 32 .

[0073] In the second form of connection between the second annular sealing structure 62 and the second baffle 32, the second extension part 62A is hinged to the second baffle 32, and the second extension part 62A is connected to the corresponding box wall through a soft sealing material, and the soft sealing material is installed on the box wall or arranged at the end of the second extension part 62A.

[0074] The first partition structure PA1 includes a first stopper 21 fixedly connected to the box structure 10, a first baffle 31, and a first annular sealing structure 61 connected to the first baffle 31. There is a gap between the outer periphery of the first baffle 31 and the box wall of the box structure 10, and the first annular sealing structure 61 extends from the first baffle 31 to the box wall of the box structure 10.

[0075] The second partition structure PA2 includes a second stopper 22 fixedly connected to the box structure 10, a second baffle 32, and a second annular sealing structure 62 connected to the second baffle 32. There is a gap between the outer periphery of the second baffle 32 and the box wall of the box structure 10, and the second annular sealing structure 62 extends from the second baffle 32 to the box wall of the box structure 10.

[0076] The first limiter 21 and the second limiter 22 are arranged correspondingly and are respectively located on both sides of the first space. The first limiter 21 is fixedly connected to the corresponding second limiter 22 by a connecting rod 5. There is a gap between the outer periphery of the first limiter 21 and the outer periphery of the second limiter 22 and the box wall of the box structure 10. That is, the outer periphery of the first limiter 21 and the outer periphery of the second limiter 22 are not in direct contact with the box wall of the box structure 10. The first limiter 21 can be fixedly connected to the box wall through a mounting seat, and the mounting seat is arranged between the first limiter 21 and the box wall. The mounting seat is connected to the first limiter 21 and the box wall by fasteners (such as bolts); or the mounting seat is a wedge block installed on the box wall, and the outer wall of the first limiter 21 is provided with a structure that cooperates with the wedge block, and the box wall abuts the first limiter 21 through the mounting seat. The material of the wedge block can be, for example, fiberglass or laminated wood. The fixed connection between the second stopper 22 and the box wall can refer to the fixed connection between the first stopper 21 and the box wall described above. Since the first stopper 21 is connected to the box wall through the mounting seat, the installation accuracy requirement is reduced.

[0077] The first baffle plate 31 and the second baffle plate 32 are connected to the connecting rod 5 .

[0078] The first baffle 31 is located between the first limiting member 21 and the transformer coil structure 1 .

[0079] The second baffle 32 is located between the second limiting member 22 and the transformer coil structure 1 .

[0080] The positions of the first baffle 31 and the second baffle 32 in the length direction of the connecting rod 5 (i.e., the vehicle width direction yy) are adjustable. The first stopper 21 and the second stopper 22 abut against the first baffle 31 and the second baffle 32 respectively, thereby clamping the transformer coil structure 1 between the first baffle 31 and the second baffle 32.

[0081] like Figure 7 , Figure 8 As shown, the first limiting member 21 is fixedly connected with the corresponding second limiting member 22 by at least two spaced connecting rods 5, preferably by three connecting rods 5. A first clamping member 41 and a second clamping member 42 are connected to each connecting rod 5. The third partition structure PA3 includes a sheet-like sealing structure 63, which is installed on the connecting rod 5 by the first clamping member 41 and the second clamping member 42 corresponding to the connecting rod 5. The connecting rod 5 and the sheet-like sealing structure 63 are clamped by the corresponding first clamping member 41 and the second clamping member 42. The first partition structure PA1, the second partition structure PA2, and the box wall of the box structure 10 are all sealed and connected to the sheet-like sealing structure 63. The first clamping member 41 and the second clamping member 42 can be fixed to each other by the clamping member fastener 4A. Figure 7 In the embodiment, the sheet-like sealing structure 63 extends to the box wall, and the sheet-like sealing structure 63 can be bent at the box wall (refer to Figure 4B The sheet-like sealing structure 63 is fixed to the box wall by a clamping structure or a fastener, thereby achieving sealing between the two.

[0082] In a preferred technical solution, the number of the first limiting members 21 and the number of the second limiting members 22 are at least two, and the first limiting members 21 are fixed to each other, and the second limiting members 22 are fixed to each other.

[0083] The sheet-like sealing structure 63 is a hard and bendable third material, the hardness of the third material is at least 70HD, and the elongation is at least 15%. It is preferably a paper material that does not chemically react with the coolant, such as NOMEX paperboard.

[0084] like Figure 7As shown, the distance between the axis of each connecting rod 5 and the axis of the transformer coil structure 1 in the height direction of the box structure 10 is smaller than the outer diameter of the transformer coil structure 1, so that in the height direction of the box structure 10 (i.e., the vehicle height direction zz), the height difference between the height of at least the portion of the sheet-shaped sealing structure 63 clamped by the first clamp 41 and the second clamp 42 and the height of the axis of the transformer coil structure 1 is smaller than the outer diameter of the transformer coil structure 1. The connecting rod 5 can be a fastener, such as a screw. The connecting rod 5 is located outside the transformer coil structure 1.

[0085] like Figure 3 , Figure 4 As shown, the first annular sealing structure 61 as a whole forms a concave structure facing the liquid inlet accommodating cavity 101, wherein the angle θ1 between the surface of each first extension portion 61A and the surface of the box wall forming the liquid inlet accommodating cavity 101 is an obtuse angle. The second annular sealing structure 62 as a whole forms a concave structure facing the connecting cavity 103, wherein the angle θ2 between the surface of each second extension portion 62A and the surface of the box wall forming the connecting cavity 103 is an obtuse angle.

[0086] Figure 4A (and Figure 4 for the same direction view) Figure 4 The first structural schematic diagram of the first extension part 61A connected to the top wall 10S1 of the box structure is shown in FIG. The first extension part 61A includes a first section 61A1 and a second section 61A2 connected in sequence. The first section 61A1 extends into a first mounting groove (not shown in the figure) provided in the first baffle 31, and the second section 61A2 contacts the top wall 10S1 of the box structure to be sealed. That is, the first extension part 61A is bent at the connection between the first section 61A1 and the second section 61A2. Figure 4A In the embodiment, the first mounting groove may be provided on the wall surface of the first baffle plate 31 facing the liquid inlet accommodating cavity 101 , for example, the first extending portion 61A may extend into the first baffle plate 31 along the vehicle width direction yy.

[0087] Figure 4B (and Figure 4 for the same direction view) Figure 4 Schematic diagram of the second structure of the first extension part 61A connected to the top wall 10S1 of the box structure. Figure 4B The embodiment shown is similar to Figure 4AThe difference of the embodiment shown is that the first extension part 61A includes a first section 61A1, a second section 61A2, and a third section 61A3 which are connected in sequence. That is, the first extension part 61A is bent at the connection between the first section 61A1 and the second section 61A2, and at the connection between the second section 61A2 and the third section 61A3. The third section 61A3 can be fitted with the top wall 10S1 of the box structure. By bending at the connection between the second section 61A2 and the third section 61A3, the sealing effect between the first extension part 61A and the top wall 10S1 of the box structure is better.

[0088] Figure 4C (and Figure 4 for the same direction view) Figure 4 Schematic diagram of the third structure of the first extension part 61A connected to the top wall 10S1 of the box structure. Figure 4C and Figure 4A The main difference is that the first installation groove for inserting the first section 61A1 (i.e., the first installation groove opened on the first baffle plate 31 cooperating with the first extension part 61A) can be opened on the wall surface of the first baffle plate 31 facing the top wall 10S1 of the box structure, for example, the first extension part 61A can extend into the first baffle plate 31 along the vehicle height direction zz.

[0089] Figure 4D (and Figure 4 for the same direction view) Figure 4 Schematic diagram of the fourth structure of the first extension part 61A connected to the top wall 10S1 of the box structure. Figure 4D and Figure 4B The main difference is that the first installation groove for inserting the first section 61A1 can be opened on the wall surface of the first baffle 31 facing the top wall 10S1 of the box structure, for example, the first extension part 61A can extend into the first baffle 31 along the vehicle height direction zz.

[0090] With reference to the connection form of the first extension portion 61A and the first baffle plate 31 , the connection form of the second extension portion 62A and the second baffle plate 32 may be similar.

[0091] When the box structure 10 is installed on the top / bottom of the vehicle 100 , the cavity wall of the outer cavity 104 away from the coil cavity 102 serves as the bottom wall / top wall of the box structure 10 .

[0092] like Figure 3-Figure 4 As shown, the outlet of the outer cavity 104 is located close to the first partition structure PA1.

[0093] like Figure 2 , Figure 3As shown, the present invention also provides a vehicle-mounted transformer, including the above-mentioned box structure. The vehicle-mounted transformer also includes a pump 30, and the inlet and outlet of the pump 30 are respectively connected to the coolant outlet 10A and the coolant inlet 10B. Figure 3 The structures of the pump 30 , the liquid outlet pipe 301 , and the liquid inlet pipe 302 are shown in dotted line form.

[0094] The present invention also provides a rail vehicle, characterized in that it comprises the above-mentioned on-board transformer.

[0095] The projection of the first stopper 21 on the first plane overlaps with the projection range of each transformer coil structure 1 on the first plane. The projection of the second stopper 22 on the first plane overlaps with the projection range of each transformer coil structure 1 on the first plane.

[0096] The box structure 10 further includes a coil structure outer cavity 105 , and the coil structure outer cavity 105 is located on a side of the coil cavity 102 away from the outer cavity 104 .

[0097] The coil structure outer cavity 105 is a closed cavity surrounded by the outer walls of the transformer coil structures 1, the box wall of the box structure 10, the first partition structure PA1, the second partition structure PA2, and the third partition structure PA3.

[0098] The following is a further detailed description of Example 1.

[0099] The vehicle-mounted transformer includes a box structure 10, a body, a liquid outlet pipe, a pump, and a liquid inlet pipe. The body includes a first stopper 21, a first baffle 31, a first annular sealing structure 61 (for example, a hard paper sealing material), a coil, a screw (for example, a pull screw), a second stopper 22, a second baffle 32, a second annular sealing structure 62 (for example, a hard paper sealing material), a clamping structure, and a sheet-like sealing structure 63 (for example, a hard paper sealing material). Figure 2 , Figure 3 shown.

[0100] The first stopper 21 and the second stopper 22 fasten the first baffle 31 , the coil and the second baffle 32 into a whole through three screws (i.e., connecting rods 5 ) at the top and bottom to ensure the stability of the device body during vehicle operation.

[0101] The first baffle plate 31 and the second baffle plate 32 are both provided with grooves around them, one end of the first annular sealing structure 61 and the second annular sealing structure 62 are respectively fixed in the grooves around the first baffle plate 31 and the second baffle plate 32, and the other end of the first annular sealing structure 61 and the second annular sealing structure 62 are both overlapped and contacted with the box wall, so as to realize the soft connection and sealing between the paper baffle and the box structure 10. This can avoid the size difficulty of matching and poor sealing effect caused by the hard connection contact between the baffle and the box wall, and can also avoid wear or damage caused by running impact.

[0102] The sheet-like sealing structure 63 is fixed to the three screws at the bottom of the body through a plurality of clamping structures. At the same time, sealing structure fixing members 64 (which may adopt a clamping structure) are provided on both sides of the box structure 10, so that the two ends of the sheet-like sealing structure 63 are fixed to the box walls on both sides, so as to achieve sealing between the sheet-like sealing structure 63 and the box walls. Figure 7 shown.

[0103] Each clamping structure is composed of a first clamping member 41 located at the top and a second clamping member 42 located at the bottom. The first clamping member 41 and the second clamping member 42 are provided with arc-shaped grooves adapted to the screw (i.e., the connecting rod 5) at the top and bottom. The first clamping member 41 is provided with threaded holes on both sides. The second clamping member 42 and the sheet-like sealing structure 63 (for example, a hard paper sealing material) are provided with through holes at corresponding positions. The screw is screwed into the first clamping member 41 through the through holes and fastened with a nut to fix the sheet-like sealing structure 63 on the screw. Among them, the first clamping member 41 close to the coil can be chamfered according to the actual distance from the coil, such as Figure 8 shown. Figure 7 In the figure, the connecting rod 5 between the two transformer coil structures 1 is located between the two transformer coil structures 1, so that at least part of the sheet-like sealing structure 63 extends upward to the position between the two transformer coil structures 1, that is, it is located at a position higher than the bottom end of the transformer coil structure 1, so that the outer cavity 104 has a larger space, which is convenient for cooling the coolant.

[0104] The first baffle plate 31 and the first annular sealing structure 61 (for example, a hard paper sealing material), the second baffle plate 32 and the second annular sealing structure 62 (for example, a hard paper sealing material), and the sheet-shaped sealing structure 63 divide the box structure 10 into a liquid inlet accommodating cavity 101, a coil cavity 102, a connecting cavity 103, and an outer cavity 104. Figure 2 , Figure 3 shown.

[0105] Two first stoppers 21 may be provided, located at the upper part and the lower part respectively, and the first stopper 21 located at the upper part and the first stopper 21 located at the lower part are connected at both ends by bolts. The first stopper 21 located at the upper part and the first stopper 21 located at the lower part are provided with coil liquid inlet holes (i.e., the first through hole 81 and the second through hole 82) at positions corresponding to the arc of the transformer coil, wherein the first through hole 81 is provided correspondingly to and communicates with the coil cavity corresponding to the first transformer coil structure 1, and the second through hole 82 is provided correspondingly to and communicates with the coil cavity corresponding to the second transformer coil structure 1.

[0106] The first baffle 31 is disposed between the coil and the first stopper 21, and the shape of the first baffle 31 conforms to the shape of the inner cavity of the box structure 10. The first baffle 31 has a coil inlet hole at a position corresponding to the coil inlet hole of the first stopper 21, and coil inlet holes are also provided at both sides of the first baffle 31 at non-contacting positions of the first stopper 21, so as to increase the inlet area of ​​the coil on the baffle, and the coolant in the inlet accommodating cavity 101 enters the coil cavity 102 through the coil inlet hole. Figure 3 .

[0107] There are two second limit members 22, located at the upper part and the lower part respectively. The second limit member 22 located at the upper part and the second limit member 22 located at the lower part are connected by bolts at both ends. The second limit member 22 located at the upper part and the second limit member 22 located at the lower part are both provided with coil liquid outlet holes (i.e., the third through hole 83 and the fourth through hole 84) at positions corresponding to the coil arc. Among them, the fourth through hole 84 is arranged correspondingly to and connected with the coil cavity corresponding to the first transformer coil structure 1, and the third through hole 83 is arranged correspondingly to and connected with the coil cavity corresponding to the second transformer coil structure 1. The second baffle 32 is arranged between the coil and the second limit member 22, and the shape of the second baffle 32 can be conformed to the shape of the inner cavity of the box structure 10. The second baffle plate 32 is provided with the same coil outlet hole at a position corresponding to the coil outlet hole of the second stopper 22. At the same time, coil outlet holes are also provided at the non-contacting parts of the second baffle plate 32 on both sides of the second baffle plate 32 to increase the liquid outlet area of ​​the coil on the baffle plate. The coolant in the coil cavity 102 enters the connecting cavity 103 through the coil outlet hole. Figure 4 .

[0108] The projection of the first through hole 81 on the first plane is within the projection range of the corresponding transformer coil structure 1 on the first plane, the projection of the second through hole 82 on the first plane is within the projection range of the corresponding transformer coil structure 1 on the first plane, the projection of the third through hole 83 on the first plane is within the projection range of the corresponding transformer coil structure 1 on the first plane, and the projection of the fourth through hole 84 on the first plane is within the projection range of the corresponding transformer coil structure 1 on the first plane. The first plane is a plane perpendicular to the axis of the transformer coil structure 1.

[0109] A fifth through hole 85 may be provided at the lower portion of the second baffle 32 , and the position of the fifth through hole 85 is lower than the position of the sheet-like sealing structure 63 . The cooling liquid in the connecting cavity 103 enters the outer cavity 104 through the fifth through hole 85 .

[0110] The hot coolant in the outer cavity 104 conducts heat to the bottom wall of the box body, and the running airflow of the vehicle during operation flows to the bottom wall of the vehicle to cool the coolant in the outer cavity 104.

[0111] The cooling liquid in the coil cavity 102 undergoes heat exchange with the coil to become hot cooling liquid, and the hot cooling liquid flows to the outer cavity 104 to be cooled, and then returns to the coil cavity 102 to cool the coil under the action of the pump. In this embodiment, the flow path of the cooling liquid is coil cavity 102→connecting cavity 103→outer cavity 104→liquid outlet pipe 301→pump 30→liquid inlet pipe 302→liquid inlet receiving cavity 101→coil cavity 102, and then circulates in this way.

[0112] The position of the liquid outlet pipe 301 is preferably set at the lower side of the outer cavity 104, and as close to the first baffle 31 as possible, to increase the path and area of ​​convective heat exchange of the coolant in the outer cavity 104. The liquid inlet pipe 302 can be set on the side wall of the box structure 10 in the liquid inlet accommodating cavity 101.

[0113] Preferably, the bending direction of the first annular sealing structure 61 is toward the liquid inlet accommodating cavity 101, and the bending direction of the second annular sealing structure 62 is toward the connecting cavity 103, which is beneficial to maintain the structural stability of the annular sealing structure under the impact of coolant flow.

[0114] Preferably, the box structure 10 is made of aluminum alloy to improve heat dissipation efficiency.

[0115] Sealing materials may be added around the first annular sealing structure 61 , the second annular sealing structure 62 , and the sheet-shaped sealing structure 63 to enhance the sealing performance with the box structure 10 .

[0116] The first annular sealing structure 61 , the second annular sealing structure 62 , and the sheet-like sealing structure 63 may also be made of other non-paper materials.

[0117] The cooling medium (i.e., coolant) can be oil, or other liquids such as easily evaporable liquids.

[0118] The sheet-shaped sealing structure 63 on the upper part of the outer cavity 104 at the bottom of the transformer may also be a structure in which a metal baffle is welded around the box structure 10 , thereby forming the outer cavity 104 .

[0119] Example 2 like Fig. 9 As shown, the difference between this embodiment 2 and embodiment 1 is that the on-board transformer further includes a cooler 20, and the cooler 20 has a cooler liquid inlet 20B and a cooler liquid outlet 20A. The cooler liquid outlet 20A is communicated with the coolant inlet 10B of the box structure 10, and the cooler liquid inlet 20B is connected to the coolant outlet 10A of the box structure 10 through a pump 30. Specifically, the coolant outlet 10A is connected to the inlet of the pump 30 through a liquid outlet pipe 301, and the cooler liquid outlet 20A is connected to the coolant inlet 10B through a liquid inlet pipe 302. The other structures of this embodiment 2 can refer to embodiment 1.

[0120] For the cooling form of the cooler 20, for example, a cooling motor may be used to drive a cooling fan, so that the coolant in the cooler 20 is cooled by sucking or blowing air. Optionally, the cooler 20 may not be provided with a cooling motor or a cooling fan, wherein the pipe in the cooler 20 is provided outside the cooler housing, so that the coolant passing through the pipe in the cooler 20 is directly cooled by the external air when the vehicle is moving. If the transformer capacity is large or the heat dissipation demand is large, one external cooling device (Example 2) or multiple external cooling devices (Example 3) may be provided according to the actual situation.

[0121] Example 3 like Fig.10 As shown, the difference between Example 3 and Example 2 is that there are at least two coolers 20, and the cooler outlet 20A corresponding to each cooler 20 is connected to the coolant inlet 10B of the box structure 10, and the cooler inlet 20B corresponding to each cooler 20 is connected to the coolant outlet 10A of the box structure 10 through the pump 30. Specifically, the coolant outlet 10A of the box structure 10 is connected to the inlet of the pump 30 through the liquid outlet pipe 301, the inlet of the first liquid outlet branch pipe 301A and the inlet of the second liquid outlet branch pipe 301B are both connected to the outlet of the pump 30, the outlet of the first liquid outlet branch pipe 301A and the outlet of the second liquid outlet branch pipe 301B are respectively connected to the cooler inlet 20B of the corresponding cooler 20, the cooler outlets 20A corresponding to the two coolers 20 are respectively connected to the inlet of the liquid inlet pipe 302 through the first liquid inlet branch pipe 302A and the second liquid inlet branch pipe 302B, and the outlet of the liquid inlet pipe 302 is connected to the coolant inlet of the box structure 10. Other structures of this embodiment 3 can refer to embodiment 2.

[0122] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0123] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention should still be included in the scope of the present invention. After reading the present invention, the modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Claims

1. A box structure with a partition structure for a vehicle-mounted transformer, the box structure (10) being used for installation on the outside of a vehicle (100), the box structure (10) being provided with a transformer coil structure (1), characterized in that: The box structure (10) is provided with a first partition structure (PA1), a second partition structure (PA2), a liquid inlet accommodating cavity (101), and a connecting cavity (103); The space enclosed by the first partition structure (PA1), the second partition structure (PA2) and the box wall of the box structure (10) accommodates the transformer coil structure (1); The transformer coil structure (1) forms a coil cavity (102); the cooling liquid in the coil cavity (102) is used to contact the coil in the transformer coil structure (1); The coil cavity (102) is in corresponding communication with the liquid inlet accommodating cavity (101) via a through hole opened on the first partition structure (PA1) and corresponding to the coil cavity (102); the coil cavity (102) is in corresponding communication with the connecting cavity (103) via a through hole opened on the second partition structure (PA2) and corresponding to the coil cavity (102); Each of the first partition structure (PA1) and the second partition structure (PA2) comprises a baffle plate and an annular sealing structure connected to the baffle plate; the baffle plate is fixedly connected to the box structure (10) and has a gap with the box structure (10); the annular sealing structure extends from the corresponding baffle plate to the box wall of the box structure (10).

2. The box structure according to claim 1, characterized in that: The number of transformer coil structures (1) in the box structure (10) is K, where K≥1; the box structure (10) has K coil cavities (102); The space between the outermost coil and the innermost coil of the i-th transformer coil structure (1) forms an i-th coil cavity (102) corresponding to the i-th transformer coil structure (1); 1≤i≤K; Each coil cavity (102) is connected to a cooling liquid inlet (10B) of the box structure (10) via the liquid inlet accommodating cavity (101); Each coil cavity (102) is connected to a cooling liquid outlet (10A) of the box structure (10) via a connecting cavity (103).

3. The box structure according to claim 1, characterized in that: The box structure (10) further comprises an outer cavity (104); a cavity wall of the outer cavity (104) away from the coil cavity (102) is a box wall of the box structure (10) and is made of a heat-conducting material; Each coil cavity (102) is connected to the cooling liquid outlet (10A) of the box structure (10) via the connecting cavity (103) and the outer cavity (104) in sequence; When the box structure (10) is installed in a vehicle (100), the outer cavity (104) is located on a side of the coil cavity (102) that is away from the vehicle (100); Preferably, when the box structure (10) is installed on the top / bottom of a vehicle (100), the cavity wall of the outer cavity (104) away from the coil cavity (102) is the bottom wall / top wall of the box structure (10).

4. The box structure according to claim 3, characterized in that: A third partition structure (PA3) is also provided in the box structure (10); The first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3), and the box wall of the box structure (10) form a first space, wherein each transformer coil structure (1) is accommodated in the first space; The outermost coil, the innermost coil, the first partition structure (PA1) and the second partition structure (PA2) of each transformer coil structure (1) form a coil cavity (102) corresponding to the transformer coil structure (1); A second space enclosed by the first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3), and the box wall of the box structure (10) is the outer cavity (104); The second partition structure (PA2) is also provided with a through hole for connecting the connecting cavity (103) with the outer cavity (104); Preferably, the outlet of the outer cavity (104) is located close to the first partition structure (PA1).

5. The box structure according to any one of claims 1 to 4, characterized in that: The annular sealing structure is made of a hard and bendable material.

6. The box structure according to any one of claims 1 to 4, characterized in that: The annular sealing structure extends into the mounting groove provided in the baffle plate, thereby being connected with the corresponding baffle plate; or The annular sealing structure comprises extension parts which are connected to each other to form the annular sealing structure, the extension parts extending from the baffle to the corresponding box wall, the extension parts being the same in number as the box wall of the box structure (10) and being arranged correspondingly; preferably, each extension part is hinged to the baffle, the extension part is connected to the corresponding box wall via a soft sealing material, the soft sealing material being mounted on the box wall or arranged at the end of the extension part.

7. The box structure according to any one of claims 1 to 4, characterized in that: The first partition structure (PA1) further comprises a first limiting member (21) fixedly connected to the box structure (10); The second partition structure (PA2) further comprises a second limiting member (22) fixedly connected to the box structure (10); The first limiting member (21) and the second limiting member (22) are arranged correspondingly, the first limiting member (21) and the second limiting member (22) are respectively located on both sides of the transformer coil structure (1), the first limiting member (21) and the corresponding second limiting member (22) are fixedly connected via a connecting rod (5); there is a gap between the first limiting member (21) and the box wall of the box structure (10), and there is a gap between the second limiting member (22) and the box wall of the box structure (10); The connecting rod (5) is connected to a baffle of the first partition structure (PA1) and a baffle of the second partition structure (PA2); The first limiting member (21) and the second limiting member (22) respectively abut against the baffle of the first partition structure (PA1) and the baffle of the second partition structure (PA2), thereby clamping the transformer coil structure (1) between the baffle of the first partition structure (PA1) and the baffle of the second partition structure (PA2).

8. The box structure according to claim 7, characterized in that: A third partition structure (PA3) is also provided in the box structure (10); the first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3), and the box wall of the box structure (10) form a first space, and the first space accommodates each transformer coil structure (1) therein; The outermost coil, the innermost coil, the first partition structure (PA1) and the second partition structure (PA2) of each transformer coil structure (1) form a coil cavity (102) corresponding to the transformer coil structure (1); The second space enclosed by the first partition structure (PA1), the second partition structure (PA2), the third partition structure (PA3) and the box wall of the box structure (10) is the outer cavity (104); the second partition structure (PA2) is also provided with a through hole for connecting the connection cavity (103) with the outer cavity (104); The first limiting member (21) is fixedly connected to the corresponding second limiting member (22) via at least two spaced connecting rods (5); the third partition structure (PA3) comprises a sheet-like sealing structure (63); the sheet-like sealing structure (63) is mounted on the connecting rod (5) via a first clamping member (41) and a second clamping member (42) corresponding to the connecting rod (5); the connecting rod (5) and the sheet-like sealing structure (63) are clamped by the corresponding first clamping member (41) and the second clamping member (42); the first partition structure (PA1), the second partition structure (PA2) and the box wall of the box structure (10) are all sealedly connected to the sheet-like sealing structure (63); Preferably, the sheet-like sealing structure (63) is made of a hard and bendable material; Preferably, the distance between the axis of each connecting rod (5) and the axis of the transformer coil structure (1) in the height direction of the box structure (10) is smaller than the outer diameter of the transformer coil structure (1), so that in the height direction of the box structure (10), the height difference between the height at which at least part of the sheet-like sealing structure (63) is located and the height at which the axis of the transformer coil structure (1) is located is smaller than the outer diameter of the transformer coil structure (1).

9. The box structure according to any one of claims 1 to 4, characterized in that: The annular sealing structure of the first separation structure (PA1) as a whole forms a concave structure facing the liquid inlet accommodating cavity (101).

10. The box structure according to any one of claims 1 to 4, characterized in that: The annular sealing structure of the second separation structure (PA2) as a whole forms a concave structure facing the connection cavity (103).

11. A vehicle-mounted transformer, characterized in that: Comprising the box structure according to any one of claims 1 to 10; Preferably, the on-board transformer further comprises a pump (30), and an inlet and an outlet of the pump (30) are respectively connected to the coolant outlet (10A) and the coolant inlet (10B); Preferably, the on-board transformer further comprises a cooler (20), the cooler (20) having a cooler liquid inlet (20B) and a cooler liquid outlet (20A); the cooler liquid outlet (20A) is communicated with the coolant inlet (10B) of the box structure (10), and the cooler liquid inlet (20B) is connected to the coolant outlet (10A) of the box structure (10); More preferably, there are at least two coolers (20), and the cooler liquid outlet (20A) corresponding to each cooler (20) is communicated with the coolant inlet (10B) of the box structure (10), and the cooler liquid inlet (20B) corresponding to each cooler (20) is connected to the coolant outlet (10A) of the box structure (10).

12. A rail vehicle, characterized in that: Includes the on-vehicle transformer as claimed in claim 11.

Images