Vehicle-mounted transformer, box body structure of vehicle-mounted transformer and railway vehicle

Abstract

The invention provides a vehicle-mounted transformer, a box body structure of the 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, a heat dissipation structure is installed on the outer side of at least one box body wall of the box body structure, and a coil cavity and an outer side cavity are formed in the box body structure; the coil cavity is formed in a space for accommodating a transformer coil structure, and cooling liquid in the coil cavity is used for being in contact with a coil in the transformer coil structure; the cooling liquid inlet of the box body structure is communicated with the cooling liquid outlet of the box body structure through the coil cavity and the outer side cavity in sequence; when the box body structure is installed on a vehicle, the outer side cavity is located on the side, away from the vehicle, of the coil cavity. The cavity wall, away from the coil cavity, of the outer side cavity is a box body wall provided with a heat dissipation structure.

Description

Technical Field

[0001] The invention relates to a box structure of a vehicle-mounted transformer, and in particular to a box structure of a transformer installed on a rail vehicle, a vehicle-mounted 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 disadvantages of the above prior art include: 1) The cooling of the traction transformer relies on the power supply to drive the rotating motor, which drives the fan impeller for forced ventilation to achieve cooling of the transformer cooling medium. Although the cooling power is large, the fan aerodynamic noise is large, and the fan motor drive consumes a large driving power; 2) The cooler generally adopts a dense fin form, which is easy to be blocked during operation. The cooler and filter need to be blown or washed with water in a short period of time (about 3-30 days); at the same time, the fan motor needs to replace the bearing regularly. Therefore, the inspection and maintenance work is more and the whole life cycle cost is higher; 3) The cooling system includes filters, coolers, cooling fans and motors, fan protection devices, etc. The system has many components, high costs, and increased probability of failure. Summary of the invention

[0006] The problem to be solved by the present invention is to provide a box structure for an on-board transformer in view of the problem that the cooling method of forced ventilation of the cooling fan adopted by the existing rail transit vehicle traction transformer causes large aerodynamic noise of the fan, large power consumption and frequent maintenance of the cooling system.

[0007] In order to solve the above technical problem, 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 arranged in the box structure (10); A heat dissipation structure is installed on the outer side of at least one box wall of the box structure (10), and the heat dissipation structure is made of heat-conducting material; The box structure (10) has a coil cavity (102) and an outer cavity (104) therein; the coil cavity (102) is formed in a space accommodating a transformer coil structure (1), and the cooling liquid in the coil cavity (102) is used to contact the coil in the transformer coil structure (1); The cooling liquid inlet (10B) of the box structure (10) is connected to the cooling liquid 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 a vehicle (100), the outer cavity (104) is located on a side of the coil cavity (102) that is away from the vehicle (100); The cavity wall of the outer cavity (104) away from the coil cavity (102) is a box wall on which a heat dissipation structure is installed.

[0008] In the present invention, the heat of the coolant in the outer cavity is transferred to the heat dissipation structure, and the heat dissipation structure exchanges heat with the outside air, thereby realizing cooling of the coolant. According to the above technical scheme, the coolant entering the box structure through the coolant inlet first passes through the coil cavity to cool the coil. Since the side wall of the outer cavity is equipped with a heat dissipation 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, cooling of the coolant can be realized 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.

[0009] 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 in communication with a cooling liquid outlet (10A) of the box structure (10) via a connecting cavity (103) and an outer cavity (104).

[0010] 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.

[0011] In the above technical solution, the box structure (10) is provided with a first partition structure (PA1), a second partition structure (PA2), and a third partition structure (PA3); 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 and the innermost coil of the i-th transformer coil structure (1) and the first partition structure (PA1) and the second partition structure (PA2) enclose a coil cavity (102) corresponding to the i-th 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 coil cavity (102) is connected to the liquid inlet accommodating cavity (101) via a through hole corresponding to the coil cavity (102) and opened on the first separation structure (PA1); The coil cavity (102) is connected to the connecting cavity (103) via a through hole corresponding to the coil cavity (102) provided 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).

[0012] 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 holding 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 connected to the heat dissipation structure, thereby achieving a better cooling effect.

[0013] In the above technical solution, the first partition structure (PA1) comprises a first baffle (31) fixedly connected to the box structure (10), and a gap is provided between the first baffle (31) and the box wall of the box structure (10); The first partition structure (PA1) further comprises a first annular sealing structure (61) connected to the first baffle plate (31) and extending from the first baffle plate (31) to the box wall of the box structure (10).

[0014] 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 first baffle matching the size of the inner cavity of the box is provided, it is difficult for the first baffle to achieve good sealing with each box wall. In the present application, a gap is provided between the outer periphery of the first baffle and the box wall of the box structure, that is, sealing is achieved by a first annular sealing structure extending to the box wall, thereby greatly reducing the requirements for assembly accuracy.

[0015] In a preferred technical solution, the first annular sealing structure (61) is a hard and bendable first material. More preferably, the hardness of the first material is at least 70HD and the elongation is at least 15%.

[0016] Through the above arrangement, since the first annular sealing structure is bendable, the annular sealing structure can be connected to the first baffle and can also abut against the box wall, thereby playing a sealing role. The first annular sealing structure can be made of paper material.

[0017] In another preferred technical solution, the first annular sealing structure (61) includes first extension parts (61A) that are the same in number as the box walls of the box structure (10) and are arranged correspondingly, 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 the first annular sealing structure (61). More preferably, the first extension parts (61A) are hinged to the first baffle (31), and the first extension parts (61A) are connected to the corresponding box wall via 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).

[0018] Through the above arrangement, the rotatable first extension part is connected to the corresponding box wall through the soft sealing material, thereby achieving better sealing with the box wall.

[0019] In another preferred embodiment, the first annular sealing structure (61) extends into a first mounting groove formed in the first baffle plate (31), thereby being connected to the first baffle plate (31).

[0020] In the above technical solution, the second partition structure (PA2) comprises a second baffle (32) fixedly connected to the box structure (10), and a gap is provided between the second baffle (32) and the box wall of the box structure (10); The second partition structure (PA2) further comprises a second annular sealing structure (62) connected to the second baffle plate (32) and extending from the second baffle plate (32) to the box wall of the box structure (10).

[0021] 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 second baffle matching the size of the inner cavity of the box is provided, it is difficult for the second baffle to achieve good sealing with each box wall. In the present application, a gap is provided between the outer periphery of the second baffle and the box wall of the box structure, that is, sealing is achieved by a second annular sealing structure extending to each box wall, thereby greatly reducing the requirements for assembly accuracy.

[0022] In a preferred technical solution, the second annular sealing structure (62) is a hard and bendable second material. More preferably, the hardness of the second material is at least 70HD and the elongation is at least 15%.

[0023] Through the above arrangement, since the second annular sealing structure is bendable, the second annular sealing structure can be connected to the second baffle and can also abut against the box wall, thereby playing a sealing role. The second annular sealing structure can be made of paper material.

[0024] In another preferred technical solution, the second annular sealing structure (62) includes second extension parts (62A) that are the same in number as the box walls of the box structure (10) and are arranged correspondingly, and the second extension parts (62A) are connected to each other to form a second annular sealing structure (62), and the second extension parts (62A) are connected to the second baffle (32) and extend from the second baffle (32) to the corresponding box wall. More preferably, 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).

[0025] Through the above arrangement, the rotatable second extension part is connected to the corresponding box wall through the soft sealing material, thereby achieving better sealing with the box wall.

[0026] In another preferred embodiment, the second annular sealing structure (62) extends into a second mounting groove formed in the second baffle plate (32), thereby being connected to the second baffle plate (32).

[0027] In the above technical solution, the first partition structure (PA1) comprises 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); a gap is provided between the first baffle (31) and a 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); The second partition structure (PA2) comprises a second position-limiting member (22) fixedly connected to the box structure (10), a second baffle plate (32), and a second annular sealing structure (62) connected to the second baffle plate (32); a gap is provided between the second baffle plate (32) and a 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); The first limiting member (21) and the second limiting member (22) are arranged correspondingly, and the first limiting member (21) and the second limiting member (22) are respectively located on both sides of the first space, and 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 the first baffle plate (31) and the second baffle plate (32); The first baffle (31) is located between the first limiting member (21) and the transformer coil structure (1); The second baffle (32) is located between the second limiting component (22) and the transformer coil structure (1).

[0028] 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 the first baffle (31) and the second baffle (32), thereby clamping the transformer coil structure (1) between the first baffle (31) and the second baffle (32), thereby ensuring the stability of various components in the box structure when the vehicle is running.

[0029] In the above technical solution, 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 both clamped by the corresponding first clamping member (41) and the second clamping member (42), and 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).

[0030] 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.

[0031] In a preferred technical solution, the sheet-like sealing structure (63) is a hard and bendable third material. More preferably, the hardness of the third material is at least 70HD and the elongation is at least 15%. For example, in this embodiment, the third material is NOMEX paperboard.

[0032] 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).

[0033] 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.

[0034] In the above technical solution, the first annular sealing structure (61) as a whole forms a concave structure facing the liquid inlet accommodating cavity (101).

[0035] Through the above arrangement, the surface of the first annular sealing structure forms an inclined surface. 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 inclined surface of the first annular sealing structure, so that there is a better sealing effect between the first annular sealing structure and the box wall.

[0036] In the above technical solution, the second annular sealing structure (62) as a whole forms a concave structure facing the connecting cavity (103).

[0037] Through the above arrangement, the surface of the second annular sealing structure forms an inclined surface. 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 inclined surface of the first annular sealing structure, so that the second annular sealing structure and the box wall have a better sealing effect.

[0038] In the above technical solution, when the box structure (10) is installed on the top / bottom of the vehicle (100), one of the box walls used to install the heat dissipation structure is the bottom wall / top wall of the box structure (10).

[0039] Through the above arrangement, the box wall on which the heat sink is installed is the box wall of the box structure away from the vehicle, so that a strong running wind can be generated on one side of the box wall when the vehicle is running, thereby having a better cooling effect on the heat sink.

[0040] In a preferred technical solution, at least one of the other box walls of the box structure (10) is also equipped with a heat dissipation structure.

[0041] In the above technical solution, the heat dissipation structure is a heat sink (7).

[0042] In a preferred technical solution, when the box structure (10) is installed on a vehicle (100), the extension direction of the heat sink (7) is parallel to the travel direction of the vehicle (100).

[0043] Through the above arrangement, the running wind passes between adjacent heat sinks, thereby achieving a better cooling effect on the heat sinks.

[0044] In the above technical solution, the outlet position of the outer cavity (104) is close to the first partition structure (PA1).

[0045] 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.

[0046] In the above technical solution, the angle between the axial direction of the transformer coil structure (1) and the extension direction of the heat sink (7) is in the range of [0°, 90°].

[0047] The above technical solutions include the following three forms: The first form: the material of the box wall is a heat conductive material; The second form: the heat dissipation structure extends into the outer cavity (104); The third form: a cavity is formed in the heat dissipation structure and is connected to the inner cavity of the outer cavity (104).

[0048] The above three forms can be set separately, or at least two of them can be used, or all three can be used simultaneously.

[0049] 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.

[0050] 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).

[0051] 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.

[0052] 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).

[0053] 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.

[0054] 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).

[0055] Based on the same inventive concept, the present invention also provides a rail vehicle, comprising the above-mentioned on-board transformer.

[0056] 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

[0057] 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.

[0058] Figure 1 It is a connection structure between the box structure of the traction transformer and the cooler in the existing rail vehicle; Figure 2is 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 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 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 part 64; heat sink 7; 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.

[0059] 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

[0060] 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.

[0061] Example 1 like Figure 2-Figure 8 As 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 .

[0062] like Figure 3As shown, a heat dissipation structure is installed on the outer side of at least one box wall of the box structure 10, and the heat dissipation structure is a heat conductive material. In this embodiment, the heat dissipation structure is a heat sink 7 (also referred to as a heat dissipation fin). The box structure 10 has a coil cavity 102 and 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 cavity wall of the outer cavity 104 away from the coil cavity 102 is the box wall on which the heat sink 7 is installed, and the material of the box wall is a heat conductive material.

[0063] In the present 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 heat sink 7 can be installed outside the box structure bottom wall 10S2, such as Figure 4 If the vehicle-mounted transformer is installed on the top of the vehicle 100, a heat sink 7 may be installed on the outside of the top wall 10S1 of the box structure.

[0064] 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.

[0065] 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.

[0066] like Figure 2-Figure 4 As shown, each coil cavity 102 is connected to the coolant inlet 10B of the box structure 10 through the liquid inlet accommodating cavity 101. Each coil cavity 102 is connected to the coolant outlet 10A of the box structure 10 through the connecting cavity 103 and the outer cavity 104. 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.

[0067] The box structure 10 is provided with a first partition structure PA1, a second partition structure PA2, and a third partition structure PA3.

[0068] 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.

[0069] 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 .

[0070] 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 .

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The first partition structure PA1 includes a first baffle plate 31 fixedly connected to the box structure 10 , and a gap is provided between the first baffle plate 31 and the box wall of the box structure 10 .

[0075] 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.

[0076] 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%.

[0077] 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 .

[0078] 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.

[0079] The second partition structure PA2 includes a second baffle plate 32 fixedly connected to the box structure 10 , and a gap is provided between the second baffle plate 32 and the box wall of the box structure 10 .

[0080] 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.

[0081] 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. For example, in this embodiment, NOMEX paperboard is used.

[0082] 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 .

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] The first baffle plate 31 and the second baffle plate 32 are connected to the connecting rod 5 .

[0088] The first baffle 31 is located between the first limiting member 21 and the transformer coil structure 1 .

[0089] The second baffle 32 is located between the second limiting member 22 and the transformer coil structure 1 .

[0090] 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.

[0091] like Figure 7 , Figure 8As 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.

[0092] 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.

[0093] The sheet-like sealing structure 63 is a hard and bendable third material, the hardness of the third material is at least 70HD, the elongation is at least 15%, and it is preferably a paper material that does not chemically react with the coolant. For example, this embodiment uses NOMEX paperboard.

[0094] like Figure 7 As 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 maximum radius of the transformer coil structure 1 (i.e., the distance between the center of the transformer coil structure 1 and the outermost coil), 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.

[0095] like Figure 3 , Figure 4As 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. The liquid inlet accommodating cavity 101 and the connecting cavity 103 are respectively located on both sides of the coil cavity 102.

[0096] 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.

[0097] 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 4A The 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.

[0098] 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 4AThe 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.

[0099] 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.

[0100] 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.

[0101] When the box structure 10 is installed on the top / bottom of the vehicle 100 , one of the box walls for mounting the heat sink 7 is the bottom wall / top wall of the box structure 10 .

[0102] Optionally, at least one of the other box walls of the box structure 10 is also equipped with a heat sink 7 located outside the box wall. For example, when the box structure 10 is installed at the bottom of the vehicle 100, a heat sink 7 can also be installed on one of the side walls of the box structure 10 or the top wall of the box structure 10.

[0103] When the box structure 10 is installed in the vehicle 100, the extension direction of the heat sink 7 is parallel to the travel direction of the vehicle 100. When the vehicle 100 travels in a straight line, the axis direction of the vehicle 100, the vehicle length direction xx, and the vehicle travel direction are in the same direction.

[0104] like Figure 3-Figure 4 As shown, the outlet of the outer cavity 104 is located close to the first partition structure PA1.

[0105] The angle range between the axial direction of the transformer coil structure 1 and the extending direction of the heat sink 7 (ie, the vehicle width direction yy) is [0°, 90°].

[0106] 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.

[0107] The present invention also provides a rail vehicle, characterized in that it comprises the above-mentioned on-board transformer.

[0108] 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.

[0109] 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 .

[0110] 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.

[0111] The following is a further detailed description of Example 1.

[0112] The vehicle-mounted transformer includes a box structure 10, a body, a heat sink 7, 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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 .

[0120] 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 .

[0121] 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.

[0122] 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 .

[0123] A radiator may be provided at the bottom of the outer cavity 104. The radiator is composed of a plurality of fins 7 parallel to the driving direction, with appropriate gaps between the fins. The hot coolant in the outer cavity 104 is transferred to the fins through the bottom wall of the box. The running wind of the vehicle flows through the gaps between the fins during operation, thereby cooling the fins and the coolant in the outer cavity 104.

[0124] 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 and is cooled by the heat sink 7, 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.

[0125] 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.

[0126] 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.

[0127] Preferably, the box structure 10 is made of aluminum alloy to improve heat dissipation efficiency.

[0128] 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 .

[0129] 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.

[0130] The cooling medium (i.e., coolant) can be oil, or other liquids such as easily evaporable liquids.

[0131] 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 .

[0132] When the transformer is disposed at the bottom of the vehicle, the heat sink 7 (ie, fins) may also be installed on the side wall and the top of the box structure 10 .

[0133] 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.

[0134] 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.

[0135] Example 3 like Fig.10As 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.

[0136] 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.

[0137] 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 of a vehicle-mounted transformer, the box structure (10) being used to be installed outside a vehicle (100), the box structure (10) being provided with a transformer coil structure (1), characterized in that: A heat dissipation structure is installed on the outer side of at least one box wall of the box structure (10), and the heat dissipation structure is made of heat-conducting material; The box structure (10) has a coil cavity (102) and an outer cavity (104) therein; the coil cavity (102) is formed in a space accommodating a transformer coil structure (1), and the cooling liquid in the coil cavity (102) is used to contact the coil in the transformer coil structure (1); The cooling liquid inlet (10B) of the box structure (10) is connected to the cooling liquid 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 a vehicle (100), the outer cavity (104) is located on a side of the coil cavity (102) that is away from the vehicle (100); The cavity wall of the outer cavity (104) away from the coil cavity (102) is a box wall on which a heat dissipation structure is installed.

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 in communication with a cooling liquid outlet (10A) of the box structure (10) via a connecting cavity (103) and an outer cavity (104).

3. The box structure according to claim 2, characterized in that: The box structure (10) is provided with a first partition structure (PA1), a second partition structure (PA2), and a third partition structure (PA3); 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 and the innermost coil of the i-th transformer coil structure (1) and the first partition structure (PA1) and the second partition structure (PA2) enclose a coil cavity (102) corresponding to the i-th 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 coil cavity (102) is connected to the liquid inlet accommodating cavity (101) via a through hole corresponding to the coil cavity (102) and opened on the first separation structure (PA1); The coil cavity (102) is connected to the connecting cavity (103) via a through hole corresponding to the coil cavity (102) provided 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); Preferably, the outlet of the outer cavity (104) is located close to the first partition structure (PA1).

4. The box structure according to claim 3, characterized in that: The first partition structure (PA1) comprises a first baffle plate (31) fixedly connected to the box structure (10), and a gap is provided between the first baffle plate (31) and the box structure (10); The first partition structure (PA1) further comprises a first annular sealing structure (61) connected to the first baffle plate (31) and extending from the first baffle plate (31) to the box wall of the box structure (10); Preferably, the first annular sealing structure (61) is made of a hard and bendable first material; Preferably, the first annular sealing structure (61) extends into a first mounting groove provided in the first baffle plate (31), thereby being connected to the first baffle plate (31); Preferably, the first annular sealing structure (61) comprises 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 each other to form the first annular sealing structure (61); each first extension part (61A) is connected to the first baffle plate (31) and extends from the first baffle plate (31) to the corresponding box wall; More preferably, each first extension portion (61A) is hinged to the first baffle (31), and the first extension portion (61A) is connected to the corresponding box wall via a soft sealing material, and the soft sealing material is installed on the box wall or arranged at the end of the first extension portion (61A).

5. The box structure according to claim 3, characterized in that: The second partition structure (PA2) comprises a second baffle (32) fixedly connected to the box structure (10), and a gap is provided between the second baffle (32) and a box wall of the box structure (10); The second partition structure (PA2) further comprises a second annular sealing structure (62) connected to the second baffle plate (32) and extending from the second baffle plate (32) to the box wall of the box structure (10); Preferably, the second annular sealing structure (62) is a hard and bendable second material; Preferably, the second annular sealing structure (62) extends into a second mounting groove provided in the second baffle plate (32), thereby being connected to the second baffle plate (32); Preferably, the second annular sealing structure (62) comprises second extension parts (62A) which are the same in number as the box walls of the box structure (10) and are arranged correspondingly, and the second extension parts (62A) are connected to each other to form the second annular sealing structure (62); each second extension part (62A) is connected to the second baffle plate (32) and extends from the second baffle plate (32) to the corresponding box wall; More preferably, each second extension portion (62A) is hinged to the second baffle (32), and the second extension portion (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 on the end of the second extension portion (62A).

6. The box structure according to claim 3, characterized in that: The first partition structure (PA1) comprises 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); a gap is provided between the first baffle (31) and a 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); The second partition structure (PA2) comprises 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); a gap is provided between the second baffle (32) and a 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); The first limiting member (21) and the second limiting member (22) are arranged correspondingly, and the first limiting member (21) and the second limiting member (22) are respectively located on both sides of the first space, and 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 the first baffle plate (31) and the second baffle plate (32); The first baffle (31) is located between the first limiting member (21) and the transformer coil structure (1); The second baffle (32) is located between the second limiting member (22) and the transformer coil structure (1); The first limiting member (21) and the second limiting member (22) respectively abut against the first baffle plate (31) and the second baffle plate (32), thereby clamping the transformer coil structure (1) between the first baffle plate (31) and the second baffle plate (32).

7. The box structure according to claim 6, characterized in that: 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 a hard and bendable third 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).

8. The box structure according to claim 4, characterized in that: The first annular sealing structure (61) as a whole forms a concave structure facing the liquid inlet accommodating cavity (101).

9. The box structure according to claim 5, characterized in that: The second annular sealing structure (62) as a whole forms a concave structure facing the connecting cavity (103).

10. The box structure according to any one of claims 1 to 9, characterized in that: When the box structure (10) is installed on the top / bottom of a vehicle (100), one of the box walls used to install the heat dissipation structure is the bottom wall / top wall of the box structure (10); Preferably, at least one of the other box walls of the box structure (10) is also equipped with a heat dissipation structure.

11. The box structure according to any one of claims 1 to 9, characterized in that: The heat dissipation structure is a heat sink (7); Preferably, when the box structure (10) is installed on a vehicle (100), the extension direction of the heat sink (7) is parallel to the travel direction of the vehicle (100); More preferably, the angle between the axial direction of the transformer coil structure (1) and the extension direction of the heat sink (7) is in the range of [0°, 90°].

12. The box structure according to any one of claims 1 to 9, characterized in that: The material of the box wall is a heat conductive material; and / or The heat dissipation structure extends into the outer cavity (104); and / or A cavity is formed in the heat dissipation structure and is communicated with the inner cavity of the outer cavity (104).

13. A vehicle-mounted transformer, characterized in that: A box structure comprising any one of claims 1 to 12; 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).

14. A rail vehicle, characterized in that: Includes the on-vehicle transformer as described in claim 13.

Images