Iron core clamp assembly and dry-type transformer
By using an insulating sleeve in a dry transformer to form an insulating isolation between the screw and the clamp, the eddy current loss problem caused by the connection between the screw and the clamp is solved, and more efficient magnetic energy transmission and conversion are achieved.
Patent Information
- Application Number
- CN202420046100.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-08
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-08
AI Technical Summary
In existing dry transformers, the screw is connected to the clamp to form a closed loop, resulting in the change of the magnetic field during the operation of the transformer to generate induced current and eddy current, increasing eddy current loss.
The first insulating sleeve and the second insulating sleeve are used to form an insulating isolation between the screw and the clamp to prevent the formation of a closed circuit and thereby reduce eddy current losses.
It effectively reduces the eddy current loss during the operation of the dry transformer and improves the efficiency and stability of the transformer.
Smart Images
Figure CN222168126U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to an iron core clamp component and a dry-type transformer. Background Art
[0002] As a type of transformer, dry-type transformers have no problems of fire, explosion and pollution compared to oil-type transformers, so they are widely used in various fields such as industry and electricity.
[0003] The iron core is the core component of the dry-type transformer. The iron core transmits the magnetic field and completes the transmission and conversion of magnetic energy. The clamp is the main component for fixing the iron core. Fixing the iron core with the clamp can improve the stability of the transformer and help reduce noise.
[0004] However, the clamp provided in the related technology is fixed with a screw, and a closed loop is formed when the screw and the clamp are connected. According to the law of electromagnetic induction, when the transformer is running, the changing magnetic field will generate an induced current in the clamp, which flows along the closed loop of the clamp and the screw to form eddy current, thereby increasing the eddy current loss during the operation of the transformer. Utility Model Content
[0005] The utility model aims to provide an iron core clamp component and a dry-type transformer. The iron core clamp component can reduce the eddy current loss of the dry-type transformer.
[0006] The embodiment of the utility model is achieved as follows:
[0007] In a first aspect, the utility model provides a core clamp assembly, comprising:
[0008] A first clamping piece, wherein the first clamping piece is provided with a first assembly hole;
[0009] a screw rod, the screw rod being inserted into the first assembly hole; and,
[0010] The first insulating sleeve is arranged between the screw rod and the hole wall of the first assembly hole.
[0011] In an optional embodiment, at least one axial end of the first insulating sleeve is flush with at least one axial end of the first assembly hole.
[0012] In an optional embodiment, two axial ends of the first insulating sleeve are respectively flush with two axial ends of the first assembly hole.
[0013] In an optional embodiment, the core clamp assembly includes a first fastener and a first insulating gasket, the first insulating gasket is sleeved on the screw, the first fastener is threadedly connected to the screw, and the first fastener holds the first insulating gasket against the first side of the first clamp.
[0014] In an optional embodiment, the core clamp assembly also includes a second fastener and a second insulating gasket, the second insulating gasket is sleeved on the screw, the second fastener is threadedly connected to the screw, and the second fastener holds the second insulating gasket against the second side of the first clamp, and the second side of the first clamp is disposed opposite to the first side of the first clamp.
[0015] In an optional embodiment, the core clamp assembly also includes a second clamp and a second insulating sleeve, the second clamp is provided with a second assembly hole, the end of the screw away from the first clamp is inserted into the second assembly hole, and the second insulating sleeve is arranged between the screw and the hole wall of the second assembly hole; the first clamp and the second clamp are distributed at intervals and are used together to clamp the core.
[0016] In an optional embodiment, at least one axial end of the second insulating sleeve is flush with at least one axial end of the second assembly hole.
[0017] In an optional embodiment, the core clamp assembly further includes a third fastener and a third insulating gasket, the third insulating gasket is sleeved on the screw, the third fastener is threadedly connected to the screw, and the third fastener holds the third insulating gasket against the first side of the second clamp.
[0018] In an optional embodiment, the core clamp assembly also includes a fourth fastener and a fourth insulating gasket, the fourth insulating gasket is sleeved on the screw, the fourth fastener is threadedly connected to the screw, and the fourth fastener holds the fourth insulating gasket against the second side of the second clamp, and the second side of the second clamp is disposed opposite to the first side of the second clamp.
[0019] In a second aspect, the utility model provides a dry-type transformer, comprising a core clamp assembly according to any one of the aforementioned implementations.
[0020] The beneficial effects of the core clamp assembly of the embodiment of the utility model include: the core clamp assembly provided by the embodiment of the utility model includes a first clamp, a screw and a first insulating sleeve, the first clamp is provided with a first assembly hole, the screw is inserted into the first assembly hole, and the first insulating sleeve is arranged between the screw and the hole wall of the first assembly hole; in this way, the first insulating sleeve is used to form an insulation isolation between the screw and the first clamp, so that a closed loop cannot be formed between the screw and the first clamp, thereby reducing the eddy current in the first clamp.
[0021] The dry-type transformer of the embodiment of the utility model includes all the beneficial effects of the aforementioned core clamp assembly, for example: a closed loop cannot be formed between the screw and the first clamp, thereby reducing the eddy current in the first clamp and reducing the eddy current loss during the operation of the dry-type transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a schematic structural diagram of a dry-type transformer in an embodiment of the utility model at a first viewing angle;
[0024] Figure 2 It is a structural schematic diagram of the dry-type transformer in the embodiment of the utility model at a second viewing angle;
[0025] Figure 3 It is a cross-sectional view of the first clamp, the first insulating sleeve and the screw in the embodiment of the utility model;
[0026] Figure 4 for Figure 1 The enlarged view of the middle IV;
[0027] Figure 5 for Figure 1 Enlarged view of point V in the middle.
[0028] Icon: 010-dry-type transformer; 100-iron core; 200-iron core clamp assembly; 210-first clamp; 211-first assembly hole; 212-first insulating sleeve; 220-screw; 230-second clamp; 241-first fastener; 242-first insulating gasket; 243-second fastener; 244-second insulating gasket; 245-third fastener; 246-third insulating gasket; 247-fourth fastener; 248-fourth insulating gasket; 300-base. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the attached drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] Please refer to Figure 1 and Figure 2 This embodiment provides a dry-type transformer 010, which includes an iron core 100 and an iron core clamp assembly 200, and the iron core clamp assembly 200 is used to fix the iron core 100.
[0035] The core clamp assembly 200 includes a first clamp 210, a screw 220 and a second clamp 230. The first clamp 210 and the second clamp 230 are spaced apart and respectively abut against both sides of the core 100. Specifically, the first clamp 210 and the second clamp 230 respectively abut against the low-pressure side and the high-pressure side of the core 100. The screw 220 is connected between the first clamp 210 and the second clamp 230, and the screw 220 is spaced apart from the outer circumference of the core 100. In this way, the core 100 can be reliably clamped between the first clamp 210 and the second clamp 230.
[0036] The number of screws 220 connected between the first clamp 210 and the second clamp 230 can be selected as needed, for example: one, two, three, four, etc.; connecting the first clamp 210 and the second clamp 230 by two or more screws 220 can improve the stability of the first clamp 210 and the second clamp 230 jointly clamping the iron core 100.
[0037] Exemplarily, the first clamp 210 and the second clamp 230 of the present embodiment are connected by four screws 220, and every two screws 220 constitute a group of screw assemblies. The two groups of screw assemblies are arranged on both sides of the iron core 100 at intervals in the horizontal direction, and the spacing direction of the two groups of screw assemblies, the direction from the high-pressure side to the low-pressure side, and the vertical direction are distributed vertically in pairs; the two screws 220 in each group of screw assemblies are distributed at intervals in the up and down directions.
[0038] In order to improve the strength of the first clamp 210, the screw 220 and the second clamp 230, metal materials are usually used to make the first clamp 210, the screw 220 and the second clamp 230. When the screw 220 and the first clamp 210, the second clamp 230 form a closed loop, when the dry-type transformer 010 is in operation, the changing magnetic field will generate an induced current in the first clamp 210 and the second clamp 230, and the eddy current will flow along the closed loop of the first clamp 210, the second clamp 230 and the screw 220, thereby increasing the eddy current loss when the dry-type transformer 010 is in operation.
[0039] To improve the above problems, please refer to Figure 3 The core clamp assembly 200 of this embodiment further includes a first insulating sleeve 212, the first clamp 210 is provided with a first assembly hole 211, the screw 220 is inserted into the first assembly hole 211, and the first insulating sleeve is provided between the screw 220 and the hole wall of the first assembly hole 211. In this way, the screw 220 and the first clamp 210 are insulated and isolated by the first insulating sleeve 212, so that a closed loop cannot be formed between the screw 220 and the first clamp 210, thereby reducing the eddy current in the first clamp 210 and reducing the eddy current loss during the operation of the dry-type transformer 010.
[0040] Furthermore, the core clamp assembly 200 further includes a second insulating sleeve (not shown in the figure), the second clamp 230 is provided with a second assembly hole (not shown in the figure), the end of the screw 220 away from the first clamp 210 is inserted into the second assembly hole, and the second insulating sleeve is provided between the screw 220 and the hole wall of the second assembly hole. In this way, the second insulating sleeve can also be used to form an insulation isolation between the screw 220 and the second clamp 230, so that a closed loop cannot be formed between the screw 220 and the second clamp 230, thereby reducing the eddy current in the second clamp 230 and reducing the eddy current loss during the operation of the dry-type transformer 010.
[0041] It should be understood that in other embodiments, the dry-type transformer 010 may selectively be provided with the first insulating sleeve 212 and the second insulating sleeve.
[0042] Optionally, the first insulating sleeve 212 and the second insulating sleeve may be made of insulating materials such as insulating rubber, which is not specifically limited herein.
[0043] To improve the reliability of isolating the first insulating sleeve 212 between the screw 220 and the hole wall of the first assembly hole 211 of the first clamp 210 , at least one axial end of the first insulating sleeve 212 is flush with at least one axial end of the first assembly hole 211 .
[0044] Furthermore, the two axial ends of the first insulating sleeve 212 are respectively flush with the two axial ends of the first assembly hole 211. Such a configuration not only allows the first insulating sleeve 212 to be reliably insulated and isolated between the screw 220 and the hole wall of the first assembly hole 211 to reduce the eddy current in the first clamp 210 and reduce the eddy current loss during the operation of the dry-type transformer 010, but also ensures a compact structural design.
[0045] Of course, in other embodiments, one axial end of the first insulating sleeve 212 is flush with one axial end of the first assembly hole 211 , and the other axial end of the first insulating sleeve 212 is retracted or protrudes relative to the other axial end of the first assembly hole 211 .
[0046] Alternatively, in other embodiments, both axial ends of the first insulating sleeve 212 are protruded or retracted relative to both axial ends of the first assembly hole 211 .
[0047] Please refer to Figure 4 In this embodiment, the core clamp assembly 200 includes a first fastener 241 and a first insulating gasket 242. The first insulating gasket 242 is sleeved on the screw rod 220. The first fastener 241 is threadedly connected to the screw rod 220, and the first fastener 241 holds the first insulating gasket 242 against the first side of the first clamp 210. Connecting the first fastener 241 to the screw rod 220 can improve the stability of the screw rod 220 connected to the first clamp 210, and the first insulating gasket 242 is arranged between the first fastener 241 and the first clamp 210. On the one hand, the stability of the first fastener 241 connected to the screw rod 220 is ensured, and on the other hand, the first insulating gasket 242 can also be used to play the role of insulation isolation, further reducing the probability of eddy current loss.
[0048] Furthermore, the core clamp assembly 200 also includes a second fastener 243 and a second insulating gasket 244, the second insulating gasket 244 is sleeved on the screw 220, the second fastener 243 is threadedly connected to the screw 220, and the second fastener 243 holds the second insulating gasket 244 against the second side of the first clamp 210, and the second side of the first clamp 210 is distributed opposite to the first side of the first clamp 210; specifically, the first end of the screw 220 passes through the first assembly hole 211 and is located on the side of the first clamp 210 away from the core 100, the first fastener 241 is connected to the first end of the screw 220 and is distributed on the side of the first clamp 210 away from the core 100, and the second fastener 243 is distributed on the side of the first clamp 210 facing the core 100. The first fastener 241 and the second fastener 243 are connected to the screw rod 220, and the first fastener 241 and the second fastener 243 are respectively located on both sides of the first clamp 210, which can ensure the stability of the screw rod 220 connected to the first clamp 210; a second insulating gasket 244 is arranged between the second fastener 243 and the first clamp 210, which on the one hand ensures the stability of the second fastener 243 connected to the screw rod 220, and on the other hand can also use the second insulating gasket 244 to play the role of insulation isolation, thereby further reducing the probability of eddy current loss.
[0049] The first fastener 241 and the second fastener 243 are both provided with threaded holes so as to be reliably threadedly connected with the screw rod 220 ; the first fastener 241 and the second fastener 243 include but are not limited to nuts.
[0050] In order to improve the reliability of the second insulating sleeve being isolated between the screw 220 and the hole wall of the second assembly hole of the second clamp 230, at least one axial end of the second insulating sleeve is flush with at least one axial end of the second assembly hole.
[0051] Furthermore, the two axial ends of the second insulating sleeve are respectively flush with the two axial ends of the second assembly hole. In this way, the second insulating sleeve can be used to reliably insulate and isolate between the screw 220 and the hole wall of the second assembly hole to reduce the eddy current in the second clamp 230 and reduce the eddy current loss during the operation of the dry-type transformer 010, and a compact structural design can be ensured.
[0052] Of course, in other embodiments, one axial end of the second insulating sleeve is flush with one axial end of the second assembly hole, and the other axial end of the second insulating sleeve is retracted or protrudes relative to the other axial end of the second assembly hole.
[0053] Alternatively, in other embodiments, both axial ends of the second insulating sleeve protrude or retract relative to both axial ends of the second assembly hole.
[0054] Please refer to Figure 5In this embodiment, the core clamp assembly 200 further includes a third fastener 245 and a third insulating gasket 246. The third insulating gasket 246 is sleeved on the screw 220. The third fastener 245 is threadedly connected to the screw 220, and the third fastener 245 holds the third insulating gasket 246 against the first side of the second clamp 230. Connecting the third fastener 245 to the screw 220 can improve the stability of the screw 220 connected to the second clamp 230, and the third insulating gasket 246 is arranged between the third fastener 245 and the second clamp 230. On the one hand, the stability of the third fastener 245 connected to the screw 220 is ensured, and on the other hand, the third insulating gasket 246 can also be used to play the role of insulation isolation, further reducing the probability of eddy current loss.
[0055] Furthermore, the core clamp assembly 200 also includes a fourth fastener 247 and a fourth insulating gasket 248, the fourth insulating gasket 248 is sleeved on the screw 220, the fourth fastener 247 is threadedly connected to the screw 220, and the fourth fastener 247 holds the fourth insulating gasket 248 against the second side of the second clamp 230, and the second side of the second clamp 230 is distributed opposite to the first side of the second clamp 230; specifically, the second end of the screw 220 passes through the second assembly hole and is located on the side of the second clamp 230 away from the core 100, the third fastener 245 is connected to the second end of the screw 220 and is distributed on the side of the second clamp 230 away from the core 100, and the fourth fastener 247 is distributed on the side of the second clamp 230 facing the core 100. The third fastener 245 and the fourth fastener 247 are connected to the screw rod 220, and the third fastener 245 and the fourth fastener 247 are respectively located on both sides of the second clamp 230, which can ensure the stability of the screw rod 220 connected to the second clamp 230; a fourth insulating gasket 248 is set between the fourth fastener 247 and the second clamp 230, on the one hand, it ensures the stability of the fourth fastener 247 connected to the screw rod 220, on the other hand, the fourth insulating gasket 248 can also be used to play the role of insulation isolation, thereby further reducing the probability of eddy current loss.
[0056] The third fastener 245 and the fourth fastener 247 are both provided with threaded holes so as to be reliably threadedly connected with the screw rod 220 ; the third fastener 245 and the fourth fastener 247 include but are not limited to nuts.
[0057] The first insulating gasket 242 , the second insulating gasket 244 , the third insulating gasket 246 and the fourth insulating gasket 248 may all be made of insulating materials such as insulating rubber, which are not specifically limited herein.
[0058] It should be understood that in other embodiments, one, two or three of the first insulating gasket 242, the second insulating gasket 244, the third insulating gasket 246 and the fourth insulating gasket 248 can be selectively provided, and no specific limitation is made herein.
[0059] Please refer to Figure 2 The dry-type transformer 010 of this embodiment further includes a base 300, and the dry-type transformer 010 includes two core clamping components 200. The two core clamping components 200 have similar structures and are both used to clamp the core 100. The two core clamping components 200 are spaced apart in the vertical direction, and the first clamping component 210 and the second clamping component 230 of the core clamping component 200 located at the bottom are also connected to the base 300. In this way, the base 300 and the core clamping component 200 can be used to reliably support the core 100.
[0060] The connection methods of the first clamp 210 and the second clamp 230 to the base 300 include but are not limited to connection with fasteners such as bolts, welding, and clamping.
[0061] In summary, the dry-type transformer 010 of the utility model uses the core clamp assembly 200 to clamp and fix the core 100, wherein the first clamp 210 and the second clamp 230 are respectively clamped on both sides of the core 100, and the first clamp 210 and the second clamp 230 are connected by a screw 220; the first assembly hole 211 of the first clamp 210 for setting the screw 220 is provided with a first insulating sleeve 212, and the second assembly hole of the second clamp 230 for setting the screw 220 is provided with a second insulating sleeve, that is, the screw 220 and the first clamp 210 and the second clamp 230 that are insulated and isolated by the first insulating sleeve 212 and the second insulating sleeve are separated, so that a closed loop cannot be formed between the screw 220 and the first clamp 210 and the second clamp 230, thereby reducing the eddy current in the first clamp 210 and the second clamp 230, and reducing the eddy current loss during the operation of the dry-type transformer 010.
[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A core clamp assembly, characterized in that: include: A first clamp (210), wherein the first clamp (210) is provided with a first assembly hole (211); a screw rod (220), wherein the screw rod (220) is inserted into the first assembly hole (211); and A first insulating sleeve (212), wherein the first insulating sleeve (212) is arranged between the screw rod (220) and a hole wall of the first assembly hole (211).
2. The core clamp assembly according to claim 1, characterized in that: At least one axial end of the first insulating sleeve (212) is flush with at least one axial end of the first assembly hole (211).
3. The core clamp assembly according to claim 2, characterized in that: The two axial ends of the first insulating sleeve (212) are respectively flush with the two axial ends of the first assembly hole (211).
4. The core clamp assembly according to claim 1, characterized in that: The core clamp assembly comprises a first fastener (241) and a first insulating gasket (242); the first insulating gasket (242) is sleeved on the screw rod (220); the first fastener (241) is threadedly connected to the screw rod (220); and the first fastener (241) holds the first insulating gasket (242) against the first side of the first clamp (210).
5. The core clamp assembly according to claim 4, characterized in that: The core clamp assembly also includes a second fastener (243) and a second insulating gasket (244), wherein the second insulating gasket (244) is sleeved on the screw rod (220), the second fastener (243) is threadedly connected to the screw rod (220), and the second fastener (243) holds the second insulating gasket (244) against the second side of the first clamp (210), and the second side of the first clamp (210) is arranged opposite to the first side of the first clamp (210).
6. The core clamp assembly according to any one of claims 1 to 5, characterized in that: The core clamp assembly further comprises a second clamp (230) and a second insulating sleeve, wherein the second clamp (230) is provided with a second assembly hole, an end of the screw rod (220) away from the first clamp (210) is inserted into the second assembly hole, and the second insulating sleeve is arranged between the screw rod (220) and the hole wall of the second assembly hole; the first clamp (210) and the second clamp (230) are spaced apart and are used together to clamp the core (100).
7. The core clamp assembly according to claim 6, characterized in that: At least one axial end of the second insulating sleeve is flush with at least one axial end of the second assembly hole.
8. The core clamp assembly according to claim 6, characterized in that: The core clamp assembly also includes a third fastener (245) and a third insulating gasket (246), wherein the third insulating gasket (246) is sleeved on the screw rod (220), the third fastener (245) is threadedly connected to the screw rod (220), and the third fastener (245) holds the third insulating gasket (246) against the first side of the second clamp (230).
9. The core clamp assembly according to claim 8, characterized in that: The core clamp assembly also includes a fourth fastener (247) and a fourth insulating gasket (248), wherein the fourth insulating gasket (248) is sleeved on the screw (220), the fourth fastener (247) is threadedly connected to the screw (220), and the fourth fastener (247) holds the fourth insulating gasket (248) against the second side of the second clamp (230), and the second side of the second clamp (230) is disposed opposite to the first side of the second clamp (230).
10. A dry-type transformer, characterized in that: The invention comprises the core clamp assembly as described in any one of claims 1 to 9.