A transformer housing and a transformer

Abstract

This application discloses a transformer housing and a transformer, relating to the field of transformer technology. The housing includes a housing body and a first limiting component. The housing body has a potting space for accommodating transformer components and potting insulation material. The first limiting component is disposed within the potting space and is connected to the outer wall of the outer winding and the inner wall of the housing body, limiting the outer winding and creating an insulation gap between the outer winding, inner winding, and magnetic core. The first limiting component of the transformer housing disclosed in this application uses an external limiting method to restrict the position of the outer winding, eliminating the need for a limiting structure between the outer and inner windings. This makes it easier for air to escape between the outer and inner windings, reducing the possibility of air bubbles. It also avoids partial discharge in the transformer caused by defects such as air bubbles in the limiting structure between the outer and inner windings, greatly improving the transformer's yield and insulation capability.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more specifically, to a transformer housing and a transformer. Background Technology

[0002] Transformers have high requirements for insulation performance, so they are usually manufactured using vacuum casting technology. A limiting structure is set between the inner and outer windings of the transformer to maintain the relative position of the outer winding with the inner winding and the magnetic core. However, if the limiting structure itself has defects such as air bubbles, it is difficult to remove them during the vacuuming process, which will cause partial discharge in the transformer at a lower voltage level, thus seriously affecting the insulation performance of the transformer.

[0003] Therefore, ensuring the insulation performance of transformers has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a transformer housing to ensure the insulation performance of the transformer.

[0005] Another object of this application is to provide a transformer including the above-described transformer housing.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A transformer housing, used in a transformer, the transformer including a transformer assembly, the transformer assembly including a magnetic core, an inner winding and an outer winding, the inner winding being wound on the magnetic core, and the outer winding being sleeved outside the inner winding, comprising:

[0008] The housing body is provided with a potting space for accommodating the transformer assembly and potting insulation material;

[0009] A first limiting component is disposed within the potting space. The first limiting component is connected to the outer wall of the outer ring winding and the inner wall of the housing body, and limits the outer ring winding. The outer wall of the outer ring winding includes the outer peripheral sidewall of the outer ring winding facing away from the inner ring winding and the axial end face sidewall.

[0010] Optionally, in the above-mentioned transformer housing, the first limiting component includes two first limiting members, and a space for accommodating the magnetic core is provided between the two first limiting members. The first end of the first limiting member is connected to the inner bottom wall of the housing body, and the second end of the first limiting member is provided with a first limiting groove.

[0011] Optionally, in the above-mentioned transformer housing, the first limiting groove includes a bottom sidewall and two first horizontal limiting sidewalls, with the two first horizontal limiting sidewalls respectively disposed on both sides of the bottom sidewall;

[0012] The bottom sidewall is used to abut against the outer peripheral sidewall of the outer winding and to limit it in the vertical direction, and the first horizontal limiting sidewall is used to abut against the axial end face sidewall of the outer winding and to limit it in the first horizontal direction.

[0013] Optionally, in the above-mentioned transformer housing, the inner sidewall of the housing body, which is spaced apart along the second horizontal direction, is provided with a curved surface structure that is adapted to the outer peripheral sidewall of the outer winding. The inner sidewall is used to abut against the outer peripheral sidewall of the outer winding and to limit it in the second horizontal direction.

[0014] Optionally, in the transformer housing described above, the first limiting groove further includes a second horizontal limiting sidewall. The bottom sidewall and the second horizontal limiting sidewall are connected. The second horizontal limiting sidewall is used to abut against the outer peripheral sidewall of the outer winding and to limit movement in the second horizontal direction.

[0015] Optionally, in the transformer housing described above, the bottom sidewall and / or the second horizontal limiting sidewall are provided with a curved surface structure adapted to the outer peripheral sidewall of the outer winding.

[0016] Optionally, in the above-mentioned transformer housing, the first limiting member includes two sub-limiting members, each of which has a limiting half-groove. The limiting half-grooves of the two sub-limiting members are arranged opposite to each other and together form the first limiting groove.

[0017] Optionally, in the transformer housing described above, there is an assembly gap between the first limiting groove and the outer winding.

[0018] And / or, along the direction from the first end to the second end of the first limiting member, the cross-sectional area of ​​the first limiting member gradually decreases.

[0019] Optionally, in the above-mentioned transformer housing, the first limiting component includes two support columns and at least one second limiting member. The first end of the support column is connected to the inner bottom wall of the housing body, and the second end of the support column is provided with a support surface for supporting the outer peripheral sidewall of the outer winding and limiting it in the vertical direction. The first end of the second limiting member is connected to the inner sidewall of the housing body, and the second end of the second limiting member is provided with a second limiting groove for limiting the outer winding in the first horizontal direction. The support column, the second limiting member, or the housing body is provided with a third horizontal limiting sidewall for limiting the outer winding in the second horizontal direction.

[0020] Optionally, in the transformer housing described above, there is an assembly gap between the second limiting groove and the outer winding.

[0021] Optionally, in the transformer housing described above, the supporting surface and / or the third horizontal limiting sidewall are provided with a curved surface structure adapted to the outer peripheral sidewall of the outer winding.

[0022] Optionally, in the transformer housing described above, the cross-sectional area of ​​the support column gradually decreases along the direction from the first end to the second end.

[0023] And / or, along the direction from the first end to the second end of the second limiting member, the cross-sectional area of ​​the second limiting member gradually decreases.

[0024] Optionally, in the transformer housing described above, the portion of the first limiting component that contacts the outer winding has a concave-convex structure. The protrusion of the concave-convex structure is used to connect with the outer wall of the outer winding, and the concave portion of the concave-convex structure is used to form an exhaust gap with the outer winding.

[0025] Optionally, in the transformer housing described above, the first limiting component includes at least one third limiting member, one end of which is connected to the housing body, and the other end is used for adhesive connection with the outer wall of the outer winding.

[0026] Optionally, in the above-mentioned transformer housing, a core limiting groove is provided in the potting space for embedding the magnetic core and limiting the magnetic core.

[0027] The magnetic core limiting groove is constructed on the inner wall of the housing body; or, the transformer housing further includes a second limiting component, which itself is provided with the magnetic core limiting groove or together with the inner wall of the housing body to form the magnetic core limiting groove.

[0028] Optionally, in the above-mentioned transformer housing, the magnetic core limiting groove is provided with a concave-convex structure for contacting the magnetic core, the convex part of the concave-convex structure is used to connect with the outer wall of the magnetic core, and the concave part of the concave-convex structure is used to form an exhaust gap with the magnetic core;

[0029] Alternatively, there may be an assembly gap between the magnetic core limiting groove and the magnetic core.

[0030] A transformer, comprising:

[0031] A transformer assembly includes a magnetic core, an inner winding, and an outer winding, wherein the inner winding is wound on the magnetic core and the outer winding is sleeved on the outside of the inner winding;

[0032] In the aforementioned transformer housing, the transformer assembly is disposed within the potting space, the first limiting component is connected to the outer wall of the outer winding and limits the outer winding, and the potting space is filled with insulating material.

[0033] The transformer housing provided in this application includes a housing body and a first limiting component. The housing body has a potting space for accommodating the transformer components and potting insulation material. The first limiting component is disposed within the potting space and is connected to the outer wall of the outer winding and the inner wall of the housing body, thereby limiting the outer winding. Specifically, under the action of the first limiting component itself or under the combined action of the first limiting component and the housing body, the outer winding can maintain a relatively fixed position relative to the inner winding and the magnetic core, and an insulating gap is maintained between the outer winding and the inner winding and the magnetic core. The outer wall of the outer winding specifically includes the outer peripheral sidewall facing away from the inner winding and the axial end face sidewall.

[0034] Compared to related technologies, the first limiting component of the transformer housing provided in this application uses an external limiting method to restrict the position of the outer winding, eliminating the need for a limiting structure between the outer and inner windings. This makes it easier for air to escape between the outer and inner windings, reducing the possibility of air bubbles. It also avoids partial discharge in the transformer caused by defects such as air bubbles in the limiting structure between the outer and inner windings, greatly improving the yield and insulation capacity of the transformer. In addition, since the installation process of the limiting structure between the outer and inner windings is eliminated, the transformer molding process is simplified, significantly improving production efficiency, and it has the advantages of simple structure and low production cost.

[0035] The transformer provided in this application includes a transformer assembly and the aforementioned transformer housing. The transformer assembly includes a magnetic core, an inner winding, and an outer winding. The inner winding is wound on the magnetic core, and the outer winding is sleeved on the outside of the inner winding, with an insulating gap between the inner and outer windings. The transformer assembly is disposed within a potting space. A first limiting component is connected to the outer wall of the outer winding. Under the action of the first limiting component itself or the combined action of the first limiting component and the housing body, a predetermined insulating gap exists between the outer winding and the inner winding and the magnetic core. The potting space is filled with insulating material, which is used to achieve insulation isolation between the outer winding and the inner winding and the magnetic core. Since it includes the aforementioned transformer housing, it also possesses the aforementioned structure and beneficial effects, which will not be elaborated further here. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the first type of transformer housing disclosed in the embodiments of this application. Figure 1 ;

[0038] Figure 2 This is a schematic diagram of the structure of the first type of transformer housing disclosed in the embodiments of this application. Figure 2 ;

[0039] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0040] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0041] Figure 5 This is a schematic diagram of the limiting structure of the transformer assembly by the first type of internal limiting structure of the transformer housing disclosed in this application. Figure 1 ;

[0042] Figure 6 This is a schematic diagram of the limiting structure of the transformer assembly by the first type of internal limiting structure of the transformer housing disclosed in this application. Figure 2 ;

[0043] Figure 7 This is a schematic diagram of the structure of the first type of transformer disclosed in the embodiments of this application. Figure 1 ;

[0044] Figure 8 This is a schematic diagram of the structure of the first type of transformer disclosed in the embodiments of this application. Figure 2 ;

[0045] Figure 9 This is a schematic diagram of the structure of the second type of transformer housing disclosed in the embodiments of this application. Figure 1 ;

[0046] Figure 10 This is a schematic diagram of the structure of the second type of transformer housing disclosed in the embodiments of this application. Figure 2 ;

[0047] Figure 11 This is a schematic diagram of the limiting structure of the transformer assembly by the second type of internal limiting structure of the transformer housing disclosed in the embodiments of this application. Figure 1 ;

[0048] Figure 12 This is a schematic diagram of the limiting structure of the transformer assembly by the second type of internal limiting structure of the transformer housing disclosed in the embodiments of this application. Figure 2 ;

[0049] Figure 13 This is a schematic diagram of the structure of the second type of transformer disclosed in the embodiments of this application. Figure 1 ;

[0050] Figure 14 This is a schematic diagram of the structure of the second type of transformer disclosed in the embodiments of this application. Figure 2 ;

[0051] Figure 15 This is a schematic diagram of the limiting structure of the outer winding of the transformer housing in the third embodiment of this application;

[0052] Figure 16 This is a schematic diagram of the limiting structure of the outer winding of the transformer housing in the fourth embodiment of this application;

[0053] Figure 17 This is a schematic diagram of the fifth type of transformer housing limiting structure for the outer winding disclosed in the embodiments of this application;

[0054] Figure 18 This is a schematic diagram of the limiting structure of the outer winding of the transformer housing in the sixth embodiment of this application;

[0055] Figure 19 This is a schematic diagram of the limiting structure of the outer winding of the transformer housing in the seventh type disclosed in the embodiments of this application;

[0056] Figure 20 for Figure 19 Cross-sectional view at point AA;

[0057] Figure 21 This is a schematic diagram of the limiting structure of the outer winding of the transformer housing in the eighth embodiment of this application;

[0058] Figure 22 This is a schematic diagram of the limiting structure of the outer winding of the transformer housing in the ninth embodiment of this application;

[0059] Figure 23 This is a schematic diagram of the tenth type of transformer housing limiting structure for the outer winding disclosed in this application embodiment;

[0060] Figure 24 This is a schematic diagram of the limiting structure of the transformer assembly by the internal limiting structure of the transformer housing disclosed in the eleventh embodiment of this application.

[0061] Wherein, 100-shell body, 101-filling space, 102-inner bottom wall, 103-inner side wall, and 103a-shell limiting side wall;

[0062] 200-First limiting component, 210-First limiting piece, 211-First limiting groove, 211a-Bottom sidewall, 211b-First horizontal limiting sidewall, 211c-Second horizontal limiting sidewall, 220-Second limiting piece, 221-Second limiting groove, 230-Support column, 231-Support surface, 232-Third horizontal limiting sidewall;

[0063] 300 - Second limiting component; 301 - Magnetic core limiting groove;

[0064] 400 - Transformer assembly, 410 - Magnetic core, 420 - Inner winding, 430 - Outer winding. Detailed Implementation

[0065] The core of this application is to disclose a transformer housing to ensure the insulation performance of the transformer.

[0066] Another key aspect of this application is the disclosure of a transformer that includes the aforementioned transformer housing.

[0067] The embodiments will now be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the structures represented in the embodiments below are not limited to those necessary for the solution of the invention as described in the claims. It should be noted that, for ease of description, only the parts relevant to the invention are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0068] Combination Figure 5 and Figure 6 In the embodiments of this application, the transformer assembly 400 refers to the core functional component of the transformer, which is used to realize the step-up or step-down function. It includes a magnetic core 410, an inner winding 420, and an outer winding 430. The inner winding 420 is tightly wound on the magnetic core 410, which is equivalent to the inner winding 420 being directly fixed on the magnetic core 410. The inner winding 420 and the magnetic core 410 maintain the same potential. The outer winding 430 is sleeved on the outside of the inner winding 420 and is arranged coaxially with the inner winding 420. Sufficient insulation gaps are provided between the outer winding 430 and the inner winding 420 and the magnetic core 410 according to the insulation isolation requirements. Depending on the specific function of the transformer, one of the inner winding 420 and the outer winding 430 serves as the primary winding, and the other serves as the secondary winding. This embodiment of the application does not limit this.

[0069] The transformer housing disclosed in this application is used in a transformer, which includes a transformer assembly 400, and serves as a vacuum filling mold for the transformer assembly 400. After vacuum filling, there is no need for preheating, demolding, and secondary curing of the mold. The transformer housing can be directly used as the outer shell of the transformer assembly 400, thereby significantly improving production efficiency and reducing the production cost of the transformer.

[0070] Combination Figure 1 and Figure 5 The transformer housing disclosed in this application includes a housing body 100 and a first limiting component 200. The housing body 100 is provided with a potting space 101 for accommodating the transformer assembly 400 and potting insulation material. The first limiting component 200 is disposed in the potting space 101 and is connected to the outer wall of the outer winding 430 and the inner wall of the housing body 100, and limits the outer winding 430. Specifically, when the transformer housing is assembled with the transformer assembly 400, the magnetic core 410 and the inner winding 420 can be directly placed in the potting space 101. The first limiting component 200 is connected and limited to the outer wall of the outer winding 430 by means of snap-fit, abutment, or adhesion. Under the action of the first limiting component 200 itself or under the combined action of the first limiting component 200 and the housing body 100, the outer winding 430 can maintain a relatively fixed position with the inner winding 420 and the magnetic core 410, and there is an insulating gap between the outer winding 430 and the inner winding 420 and the magnetic core 410. The outer wall of the outer winding 430 specifically includes the outer peripheral sidewall of the outer winding 430 facing away from the inner winding 420 and the axial end face sidewall.

[0071] This application uses the first limiting component 200 to limit the outer wall of the outer winding 430, thereby fixing and maintaining the position of the outer winding 430 within the potting space 101. This allows the outer winding 430 to maintain the required insulation gap with the inner winding 420 and the magnetic core 410 without the need for additional limiting structures, facilitating subsequent potting and encapsulation. The magnetic core 410 can be directly placed within the potting space 101 to determine the position of the inner winding 420. Furthermore, a second limiting component 300 can be provided to further limit the positions of the magnetic core 410 and the inner winding 420 within the potting space 101.

[0072] Compared to related technologies, the first limiting component 200 of the transformer housing disclosed in this application uses an external limiting method to limit the position of the outer winding 430, eliminating the setting of the limiting structure between the outer winding 430 and the inner winding 420. This makes it easier for air to be discharged between the outer winding 430 and the inner winding 420, reducing the possibility of air bubbles. At the same time, it avoids partial discharge of the transformer caused by defects such as air bubbles in the limiting structure between the outer winding 430 and the inner winding 420, greatly improving the yield and insulation capacity of the transformer. In addition, since the installation process of the limiting structure between the outer winding 430 and the inner winding 420 is eliminated, the transformer molding process is also simplified, greatly improving production efficiency, and it has the advantages of simple structure and low production cost.

[0073] Specifically, the shell body 100 can be a cylindrical structure, a cubic structure, or other structures. Taking a cubic structure as an example, combined with... Figure 1 , Figure 15 and Figure 16 The housing body 100 has an opening on one side for mounting the transformer assembly 400 and potting insulation material. The housing body 100 has an inner bottom wall 102 and four inner side walls 103, which together form a potting space 101. Taking the arrangement direction during potting as an example, the opening of the housing body 100 faces upward, and the inner bottom wall 102 is located below the inner side walls 103. Typically, the outer winding 430 is arranged in the potting space 101 as follows: Figure 5 , Figure 6 and Figure 8 The arrangement shown is such that the outer winding 430 is arranged horizontally. Within the potting space 101, the side of the magnetic core 410 with the inner winding 420 is near the opening of the housing body 100, while the side without the inner winding 420 can be directly placed on the inner bottom wall 102 of the housing body 100. This facilitates the arrangement of the transformer assembly 400 and the outgoing wires of the inner winding 420 and the outer winding 430. Alternatively, during potting, the outer winding 430 can also be arranged vertically or in other directions. This application does not limit this arrangement. For ease of description, the following description uses the arrangement of the outer winding 430 extending horizontally as a specific embodiment. Other arrangements of the outer winding 430 within the potting space 101 can be referred to in conjunction with this, and will not be repeated here.

[0074] In some embodiments, the first limiting component 200 limits the outer winding 430 by contacting the outer wall of the outer winding 430 and pressing the outer winding 430 against the inner wall of the housing body 100; in other embodiments, the first limiting component 200 limits the outer winding 430 by providing a limiting groove into which the outer winding 430 can be embedded, so as to meet the relative position requirements of the outer winding 430 with the magnetic core 410 and the inner winding 420, and to prevent displacement during vacuum potting, thus ensuring reliable limiting.

[0075] In some embodiments disclosed in this application, combined with Figure 19 and Figure 20 The first limiting component 200 includes two first limiting members 210, and a space for accommodating the magnetic core 410 is provided between the two first limiting members 210 to avoid affecting the installation of the magnetic core 410 in the potting space 101. The first end of the first limiting member 210 is connected to the inner bottom wall 102 of the housing body 100, and the second end of the first limiting member 210 is provided with a first limiting groove 211. The outer ring winding 430 is used to be disposed in the first limiting groove 211. The first limiting groove 211 is used to limit the outer ring winding 430 and reliably fix the outer ring winding 430 in a preset position during potting.

[0076] The following example uses the arrangement direction during glue pouring. The first horizontal direction and the second horizontal direction refer to two mutually perpendicular directions on the horizontal plane in the space. The first horizontal direction is parallel to the axis of the outer winding 430, and the second horizontal direction is perpendicular to the axis of the outer winding 430. The vertical direction is the vertical direction in the space. Any two of the vertical direction, the first horizontal direction and the second horizontal direction are mutually perpendicular.

[0077] Specifically, in combination Figure 20 and Figure 22 The sidewall of the first limiting groove 211 includes a bottom sidewall 211a and two first horizontal limiting sidewalls 211b. The two first horizontal limiting sidewalls 211b are respectively disposed on both sides of the bottom sidewall 211a. The bottom sidewall 211a is used to abut against the outer peripheral sidewall of the outer winding 430 and to limit the outer winding 430 in the vertical direction. When the transformer housing is assembled with the transformer assembly 400, the bottom sidewall 211a can support the bottom outer peripheral sidewall of the outer winding 430 by clamping or snapping. The first horizontal limiting sidewalls 211b are used to abut against the axial end face sidewall of the outer winding 430 and to limit the outer winding 430 in the first horizontal direction.

[0078] It should be noted that, although Figure 22The two first limiting members 210 can clamp the outer winding 430 to a certain extent and simultaneously play a limiting role in the vertical and second horizontal directions. However, since the outer winding 430 has a certain elasticity and is prone to displacement relative to the first limiting member 210 in the second horizontal direction during glue filling, in order to ensure the reliability of the limiting of the outer winding 430, it is also necessary to limit the outer winding 430 in the second horizontal direction.

[0079] In some embodiments, the housing body 100 limits the outer winding 430 in a second horizontal direction. Specifically, two inner sidewalls 103 of the housing body 100 spaced apart along the second horizontal direction are provided with housing limiting sidewalls 103a. The housing limiting sidewalls 103a abut against the outer peripheral sidewall of the outer winding 430 and limit it in the second horizontal direction. The housing limiting sidewalls 103a can be planar structures or curved surface structures adapted to the outer peripheral sidewall of the outer winding 430. For example, Figure 22 The diagram shows a technical solution where the shell limiting sidewall 103a has a planar structure, and the contact area between the shell body 100 and the outer winding 430 is small, making it easy to exhaust air. Figure 23 The paper presents a technical solution in which the housing limiting sidewall 103a is a curved surface structure adapted to the outer peripheral sidewall of the outer winding 430, which has high limiting reliability.

[0080] In other embodiments, the first limiting member 210 limits the outer winding 430 in a second horizontal direction. Specifically, in conjunction with Figure 19 and Figure 20 The first limiting groove 211 also includes a second horizontal limiting sidewall 211c. The bottom sidewall 211a is connected to the second horizontal limiting sidewall 211c. The two first horizontal limiting sidewalls 211b are respectively arranged on both sides of the second horizontal limiting sidewall 211c. The second horizontal limiting sidewall 211c is used to abut against the outer peripheral sidewall of the outer winding 430 and limit it in the second horizontal direction. That is, the first limiting groove 211 on the first limiting member 210 can simultaneously limit the outer winding 430 in the horizontal and vertical directions. The structure is simple, easy to produce, and reliable in positioning.

[0081] The aforementioned bottom sidewall 211a can be a planar structure or a curved surface structure adapted to the outer peripheral sidewall of the outer winding 430; the second horizontal limiting sidewall 211c can be a planar structure or a curved surface structure adapted to the outer peripheral sidewall of the outer winding 430. Combined with... Figure 20 It illustrates a technical solution where both the bottom sidewall 211a and the second horizontal limiting sidewall 211c are planar structures, and the two are arranged vertically; combined with Figure 21This paper presents a technical solution in which both the bottom sidewall 211a and the second horizontal limiting sidewall 211c are curved surface structures adapted to the outer peripheral sidewall of the outer winding 430, and the connection position between the two is smoothly transitioned. Among them, the bottom sidewall 211a and the second horizontal limiting sidewall 211c with planar structure have a smaller contact area with the outer winding 430, which facilitates venting.

[0082] Since the outer winding 430 is fitted around the magnetic core 410 and the inner winding 420, in order not to affect the molding of the magnetic core 410, the two first limiting members 210 can be respectively arranged at two inner sidewalls 103 spaced apart along the second horizontal direction near the housing body 100. During molding, the magnetic core 410 can pass between the two first limiting members 210 and be placed in the potting space 101. At the same time, when the transformer housing is assembled with the transformer assembly 400, the two first limiting members 210 can be symmetrically supported at two positions at the bottom of the outer winding 430, thereby ensuring reliable support and limiting of the outer winding 430. Figure 11 and Figure 12 The first limiting member 210 mentioned above can be a columnar structure, and the first end of the columnar first limiting member 210 is connected to the inner bottom wall 102 of the housing body 100, and the second end supports and limits the outer winding 430; the first end of the first limiting member 210 can also be set on the inner side wall 103 of the housing body 100, as long as it does not affect the assembly of the magnetic core 410.

[0083] The aforementioned first limiting member 210 can be an integral component or a separate component, combined with Figure 19 and Figure 20 It illustrates a technical solution where the first limiting member 210 is an integral component; combined with Figure 24 The first limiting member 210 is a split component, including two sub-limiting members. Each sub-limiting member has a limiting half-groove. The limiting half-grooves of the two sub-limiting members are arranged opposite to each other and can jointly form the aforementioned first limiting groove 211. One first limiting member 210 supports and limits one position of the outer winding 430, resulting in a reliable structure. This application embodiment does not limit the number of the first limiting member 210 and the sub-limiting members.

[0084] In some embodiments, in order to facilitate the air discharge of the transformer during the potting process, when the transformer housing and the transformer assembly 400 are assembled, an assembly gap is provided between the first limiting groove 211 and the outer winding 430. This assembly gap allows the outer winding 430 to have a certain amount of room for movement in the horizontal direction, which is beneficial to the subsequent molding of the transformer assembly 400 and the air discharge during potting.

[0085] In a further embodiment, the first end and the second end of the first limiting member 210 are defined as opposite ends on the first limiting member 210. Then, along the direction from the first end to the second end of the first limiting member 210, the cross-sectional area of ​​the first limiting member 210 gradually decreases. This is to ensure the reliability of the first limiting member 210 in limiting the housing body 100, while reducing the contact area between the first limiting member 210 and the outer winding 430, and reducing the production cost of the transformer housing. This application reduces the air bubbles that may exist at the contact area between the first limiting member 210 and the outer winding 430 by reducing the contact area between the two, thus ensuring the potting quality.

[0086] In other embodiments disclosed in this application, combined with Figure 1 and Figure 2 The first limiting component 200 includes two support columns 230 and at least one second limiting member 220. The first end of the support column 230 is connected to the inner bottom wall 102 of the housing body 100, in conjunction with... Figure 4 and Figure 5 The second end of the support column 230 is provided with a support surface 231 for supporting the outer peripheral sidewall of the outer winding 430 and for vertical positioning; combined with Figure 1 and Figure 3 The first end of the second limiting member 220 is connected to the housing body 100, and the second end of the second limiting member 220 is provided with a second limiting groove 221 for limiting the outer winding 430 in the first horizontal direction. For example, the second limiting member 220 can be a column structure provided on the inner bottom wall 102 of the housing body 100; or, combined with... Figure 1 and Figure 5 Two protruding structures are provided on the inner sidewall 103 of the housing body 100 as second limiting members 220, and a second limiting groove 221 is formed between the two protruding structures. The two second limiting grooves 221 can respectively limit the two positions of the outer ring winding 430 in the circumferential direction; or, combined with Figure 9 and Figure 11 The second limiting member 220 can be a columnar structure provided on the two inner sidewalls 103 of the housing body 100. A second limiting groove 221 is formed between the two columnar structures, and the top position in the circumferential direction is limited in the first horizontal direction when the outer ring winding 430 is potted.

[0087] A third horizontal limiting sidewall 232 for second horizontally limiting the outer winding 430 is provided on the support column 230, the second limiting member 220, or the housing body 100. For example, in conjunction with... Figure 2 and Figure 18 It shows a technical solution in which the third horizontal limiting sidewall 232 is constructed on the inner sidewall 103 of the housing body 100. The structure is simple and the cost is reduced. Figure 15 and Figure 16The diagram shows a technical solution for constructing the third horizontal limiting sidewall 232 on the support column 230, which has a simple structure and reliable limiting. Figure 17 The diagram shows a technical solution for constructing the third horizontal limiting sidewall 232 on the second limiting member 220. The structure is simple and the limiting is reliable.

[0088] In some embodiments, in order to facilitate the air discharge of the transformer during the potting process, when the transformer housing and the transformer assembly 400 are assembled, an assembly gap is provided between the second limiting groove 221 and the outer winding 430. This assembly gap allows the outer winding 430 to have a certain amount of room for movement in the first horizontal direction, which is beneficial to the subsequent molding of the transformer assembly 400 and the air discharge during potting.

[0089] The aforementioned support surface 231 can be a planar structure or a curved surface structure adapted to the outer peripheral sidewall of the outer winding 430; the third horizontal limiting sidewall 232 can be a planar structure or a curved surface structure adapted to the outer peripheral sidewall of the outer winding 430. For example, in conjunction with... Figure 15 It illustrates a technical solution where both the support surface 231 and the third horizontal limiting sidewall 232 are planar structures, and the two are arranged vertically; combined with Figure 16 and Figure 18 It illustrates a technical solution where both the support surface 231 and the third horizontal limiting sidewall 232 are provided with curved surface structures adapted to the outer peripheral sidewall of the outer winding 430, and the connection position between the two is smoothly transitioned. Furthermore, Figure 16 The support surface 231 and the third horizontal limiting sidewall 232 are both constructed on the support column 230. Figure 18 The support surface 231 and the third horizontal limiting sidewall 232 are respectively constructed on the support column 230 and the inner sidewall 103 of the shell body 100; combined with Figure 17 This application illustrates a technical solution where the third horizontal limiting sidewalls 232 on the two second limiting members 220 are respectively a planar structure and a curved surface structure adapted to the outer peripheral sidewall of the outer winding 430. This application does not limit the specific number of the second limiting members 220, and the structures of different second limiting members 220 can be the same or different, as can the structures of the two support columns 230.

[0090] Combination Figure 9 and Figure 10The first end of the second limiting member 220 is connected to the inner wall 103 of the housing body 100, and the second end extends towards the outer winding 430. The first and second ends of the second limiting member 220 are opposite ends on the second limiting member 220. Along the direction from the first end to the second end of the second limiting member 220, the cross-sectional area of ​​the second limiting member 220 gradually decreases to ensure the reliability of the connection between the second limiting member 220 and the housing body 100. Simultaneously, by reducing the contact area between the second limiting member 220 and the outer winding 430, the potting quality is ensured, the insulation performance of the transformer is improved, and the production cost of the transformer housing is reduced. Similarly, along the direction from the first end to the second end of the support column 230, the cross-sectional area of ​​the support column 230 can also be set to gradually decrease. Furthermore, the support column 230 and the second limiting member 220 can be a separate structure, or they can be directly integrated into a bracket structure using injection molding or other methods, which facilitates production.

[0091] In some embodiments disclosed in this application, in order to facilitate the air expulsion at the contact point between the first limiting component 200 and the outer winding 430 during the potting process and reduce the generation of air bubbles, combined with Figures 2-4 The first limiting component 200 has a concave-convex structure for contacting the outer winding 430; wherein, when the transformer housing and the transformer assembly 400 are assembled, the convex part of the concave-convex structure connects to the outer wall of the outer winding 430, and the concave part of the concave-convex structure forms an exhaust gap with the outer winding 430, which allows air to pass through and reduces the generation of air bubbles during potting. For example, in conjunction with... Figure 3 and Figure 4 The concave-convex structure can take the form of, but is not limited to, a wave-shaped structure, a triangular sawtooth structure, a quadrilateral sawtooth structure, etc.; in addition, the inner walls of the first limiting groove 211, the second limiting groove 221, the support surface 231, and the third horizontal limiting sidewall 232 can be directly set as concave-convex structures.

[0092] To reduce costs, in some embodiments, the first limiting component 200 includes at least one third limiting member. One end of the third limiting member is connected to the housing body 100, and the other end is used for adhesive connection to the outer wall of the outer winding 430. This adhesive arrangement can effectively reduce the number of components in the first limiting component 200 and simplify its structure, thereby optimizing the venting effect of the transformer during potting. For example, two third limiting members can be arranged only inside the housing body 100, and the adhesive connection between the third limiting member and the outer winding 430 achieves reliable fixation of the position of the outer winding 430.

[0093] Since the inner winding 420 is mainly fixed in position by the magnetic core 410, and the shape of the magnetic core 410 is not fixed, if the surface of the magnetic core 410 that is used to contact the inner bottom wall 102 of the housing body 100 is a planar structure, the magnetic core 410 can be placed vertically inside the housing body 100 and supported by the inner bottom wall 102 of the housing body 100. Furthermore, the magnetic core 410 can be positioned by structures such as the magnetic core limiting groove 301. If the surface of the magnetic core 410 that is used to contact the inner bottom wall 102 of the housing body 100 is a curved structure and it cannot be stably placed inside the potting housing body 100, then the magnetic core 410 needs to be fixed and limited in position by structures such as the magnetic core limiting groove 301.

[0094] In some embodiments disclosed in the application, a core limiting groove 301 is provided in the potting space 101 for embedding and limiting the magnetic core 410. The core limiting groove 301 can be constructed on the inner bottom wall 102 or other inner side wall 103 of the housing body 100, which is simple in structure and easy to manufacture. Alternatively, the transformer housing also includes a second limiting component 300, which is disposed in the potting space 101. The second limiting component 300 itself is provided with the aforementioned core limiting groove 301 or together with the inner wall of the housing body 100 to form the aforementioned core limiting groove 301. When the transformer housing is assembled with the transformer assembly 400, the core limiting groove 301 can limit the magnetic core 410, thereby ensuring the fixation of the position of the outer winding 430 relative to the inner winding 420 and the magnetic core 410 during potting. This method of limiting the magnetic core 410 by slotting is simple and reliable in structure. For example, the second limiting component 300 may include one or more fourth limiting members. When there is one fourth limiting member, the fourth limiting member is provided with a magnetic core limiting groove 301. When there are multiple fourth limiting members, the multiple fourth limiting members can jointly form the magnetic core limiting groove 301. Figure 1 and Figure 2 The diagram shows a technical solution where the fourth limiting member is a column structure, and multiple columns together form the magnetic core limiting groove 301. The structure is simple and the cost is low. The fourth limiting member can also be used to press the magnetic core 410 against the inner wall of the housing body 100 to achieve the positioning of the magnetic core 410 and the inner winding 420. That is, the magnetic core limiting groove 301 is formed by the fourth limiting member and the inner wall of the housing body 100.

[0095] Furthermore, to facilitate venting, the portion of the second limiting component 300 that contacts the magnetic core 410 can be configured with a concave-convex structure, or the magnetic core limiting groove 301 can be provided with a concave-convex structure for contacting the magnetic core 410, thereby reducing the contact area, reducing bubble generation, and ensuring the quality of the transformer. Specifically, when the transformer housing is assembled with the transformer assembly 400, the protrusion of the concave-convex structure of the second limiting component 300 or the magnetic core limiting groove 301 is connected to the outer wall of the magnetic core 410, and a venting gap is formed between the concave portion and the magnetic core 410. Alternatively, in some embodiments, when the transformer housing is assembled with the transformer assembly 400, there is an assembly gap between the magnetic core limiting groove 301 and the magnetic core 410, which can be used for venting, improving the insulation performance of the transformer, and facilitating molding.

[0096] The first limiting component 200, the second limiting component 300, and the housing body 100 described above can all be made of insulating materials such as plastic. The first limiting component 200 and the housing body 100 can be configured as an integral or separate structure, and the second limiting component 300 and the housing body 100 can also be configured as an integral or separate structure. For example, without affecting the assembly of the magnetic core 410 and the inner winding 420, the second limiting component 220 can be directly integrated with the housing body 100 through injection molding or other methods, improving the production efficiency of the transformer housing. If the position of the second limiting component 220 affects the assembly of the magnetic core 410 and the inner winding 420, the second limiting component 220 and the housing body 100 can be configured as separate structures. During molding, the magnetic core 410 is first assembled in the potting space 101, and then the second limiting component 220 is installed with the housing body 100. In addition, when the first limiting component 200 or the second limiting component 300 is a separate structure from the housing body 100, the positions of the first limiting component 200 and the second limiting component 300 on the housing body 100 can be adjusted to improve the flexibility of assembly.

[0097] Figure 7 and Figure 8 The diagram shows the structure of a transformer. Figure 13 and Figure 14 The diagram illustrates the structure of another type of transformer. (Combined with...) Figure 7 , Figure 8 , Figure 13 and Figure 14The transformer disclosed in this application includes a transformer assembly 400 and the aforementioned transformer housing. The transformer assembly 400 includes a magnetic core 410, an inner winding 420, and an outer winding 430. The inner winding 420 is wound on the magnetic core 410, and the outer winding 430 is sleeved on the outside of the inner winding 420. The transformer assembly 400 is disposed within a potting space 101. A first limiting component 200 is connected to the outer wall of the outer winding 430 and limits the outer winding 430. The potting space 101 is filled with insulating material, which is used to achieve insulation isolation between the outer winding 430 and the inner winding 420 and the magnetic core 410. The insulating material includes, but is not limited to, epoxy resin, polyester resin, etc. Since it includes the aforementioned transformer housing, it also possesses the aforementioned structure and beneficial effects, which will not be repeated here.

[0098] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transformer housing for use in a transformer, the transformer including a transformer assembly (400), the transformer assembly (400) including a magnetic core (410), an inner winding (420) and an outer winding (430), the inner winding (420) being wound on the magnetic core (410), and the outer winding (430) being sleeved on the outside of the inner winding (420), characterized in that, include: The housing body (100) is provided with a potting space (101) for accommodating the transformer assembly (400) and potting insulation material. A first limiting component (200) is disposed within the potting space (101). The first limiting component (200) is connected to the outer wall of the outer ring winding (430) and the inner wall of the housing body (100), and limits the outer ring winding (430). The outer wall of the outer ring winding (430) includes the outer peripheral sidewall and the axial end face sidewall of the outer ring winding (430) facing away from the inner ring winding (420).

2. The transformer housing as described in claim 1, characterized in that, The first limiting component (200) includes two first limiting members (210), and a space for accommodating the magnetic core (410) is provided between the two first limiting members (210). The first end of the first limiting member (210) is connected to the inner bottom wall (102) of the housing body (100), and the second end of the first limiting member (210) is provided with a first limiting groove (211).

3. The transformer housing as described in claim 2, characterized in that, The first limiting groove (211) includes a bottom sidewall (211a) and two first horizontal limiting sidewalls (211b), with the two first horizontal limiting sidewalls (211b) respectively disposed on both sides of the bottom sidewall (211a); The bottom sidewall (211a) is used to abut against the outer peripheral sidewall of the outer winding (430) and limit it in the vertical direction, and the first horizontal limiting sidewall (211b) is used to abut against the axial end face sidewall of the outer winding (430) and limit it in the first horizontal direction.

4. The transformer housing as described in claim 3, characterized in that, The inner sidewall (103) of the housing body (100) is provided with a curved surface structure that is adapted to the outer peripheral sidewall of the outer winding (430) and is used to abut against the outer peripheral sidewall of the outer winding (430) and limit it in the second horizontal direction.

5. The transformer housing as described in claim 3, characterized in that, The first limiting groove (211) further includes a second horizontal limiting sidewall (211c), the bottom sidewall (211a) and the second horizontal limiting sidewall (211c) are connected, and the second horizontal limiting sidewall (211c) is used to abut against the outer peripheral sidewall of the outer winding (430) and limit it in the second horizontal direction.

6. The transformer housing as described in claim 5, characterized in that, The bottom sidewall (211a) and / or the second horizontal limiting sidewall (211c) are provided with curved surface structures that are adapted to the outer peripheral sidewall of the outer winding (430).

7. The transformer housing as described in claim 2, characterized in that, The first limiting member (210) includes two sub-limiting members, each of which has a limiting half-groove. The limiting half-grooves of the two sub-limiting members are arranged opposite to each other and together form the first limiting groove (211).

8. The transformer housing as described in claim 2, characterized in that, There is an assembly gap between the first limiting groove (211) and the outer winding (430); And / or, along the direction from the first end to the second end of the first limiting member (210), the cross-sectional area of ​​the first limiting member (210) gradually decreases.

9. The transformer housing as described in claim 1, characterized in that, The first limiting component (200) includes two support columns (230) and at least one second limiting member (220). The first end of the support column (230) is connected to the inner bottom wall (102) of the housing body (100). The second end of the support column (230) is provided with a support surface (231) for supporting the outer peripheral sidewall of the outer winding (430) and limiting it in the vertical direction. The first end of the second limiting member (220) is connected to the inner sidewall (103) of the housing body (100). The second end of the second limiting member (220) is provided with a second limiting groove (221) for limiting the outer winding (430) in the first horizontal direction. The support column (230), the second limiting member (220), or the housing body (100) is provided with a third horizontal limiting sidewall (232) for limiting the outer winding (430) in the second horizontal direction.

10. The transformer housing as described in claim 9, characterized in that, There is an assembly gap between the second limiting groove (221) and the outer winding (430).

11. The transformer housing as described in claim 9, characterized in that, The support surface (231) and / or the third horizontal limiting sidewall (232) are provided with a curved surface structure that is adapted to the outer peripheral sidewall of the outer winding (430).

12. The transformer housing as described in claim 9, characterized in that, Along the direction from the first end to the second end of the support column (230), the cross-sectional area of ​​the support column (230) gradually decreases; And / or, along the direction from the first end to the second end of the second limiting member (220), the cross-sectional area of ​​the second limiting member (220) gradually decreases.

13. The transformer housing as described in any one of claims 1-12, characterized in that, The part of the first limiting component (200) that contacts the outer ring winding (430) has a concave-convex structure. The convex part of the concave-convex structure is used to connect with the outer wall of the outer ring winding (430), and the concave part of the concave-convex structure is used to form an exhaust gap with the outer ring winding (430).

14. The transformer housing as described in claim 1, characterized in that, The first limiting component (200) includes at least one third limiting member, one end of which is connected to the housing body (100), and the other end is used for adhesive connection to the outer wall of the outer winding (430).

15. The transformer housing as described in claim 1, characterized in that, The potting space (101) is provided with a core limiting groove (301) for embedding the core (410) and limiting the core (410). The magnetic core limiting groove (301) is constructed on the inner wall of the housing body (100); or, the transformer housing further includes a second limiting component (300), which itself is provided with the magnetic core limiting groove (301) or together with the inner wall of the housing body (100) to form the magnetic core limiting groove (301).

16. The transformer housing as described in claim 15, characterized in that, The magnetic core limiting groove (301) is provided with a concave-convex structure for contacting the magnetic core (410). The protrusion of the concave-convex structure is used to connect with the outer wall of the magnetic core (410), and the concave part of the concave-convex structure is used to form an exhaust gap with the magnetic core (410). Alternatively, there may be an assembly gap between the magnetic core limiting groove (301) and the magnetic core (410).

17. A transformer, characterized in that, include: A transformer assembly (400) includes a magnetic core (410), an inner winding (420) and an outer winding (430), wherein the inner winding (420) is wound on the magnetic core (410) and the outer winding (430) is sleeved on the outside of the inner winding (420); The transformer housing as described in any one of claims 1-16, wherein the transformer assembly (400) is disposed within the potting space (101), the first limiting assembly (200) is connected to the outer wall of the outer winding (430) and limits the outer winding (430), and the potting space (101) is filled with insulating material.

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