WO2020199372A1

WO2020199372A1 - Amorphous alloy stereoscopic wound core and single frame thereof

Info

Publication number: WO2020199372A1
Application number: PCT/CN2019/092253
Authority: WO
Inventors: 李晓雨; 庞靖; 李庆华
Original assignee: 青岛云路先进材料技术股份有限公司
Priority date: 2019-04-04
Filing date: 2019-06-21
Publication date: 2020-10-08
Also published as: CN109801774A

Abstract

An amorphous alloy stereoscopic wound core and a single frame thereof. The single frame comprises a single frame base of a square structure and an inner support frame having an inner hole structure. The single frame base is formed by winding multi-level amorphous alloy strips having different widths around the outer peripheral wall of the inner support frame, and the amorphous alloy strips are rectangular or trapezoidal. The single frame further comprises a cured adhesive layer provided on the outer surface of the single frame base. The cured adhesive forming the cured adhesive layer has viscosity less than 300 Pa•s, a thermal expansion coefficient greater than 3 ppm/°C, and shear strength greater than 0.2 MPa. According to the single frame of the amorphous alloy stereoscopic wound core, an inner support frame is provided at the center of the single frame base, and the outer surface of the single frame base is coated with a cured adhesive layer. The design of the inner support frame can reduce the deformation probability of the amorphous alloy strip during winding, and the combination of the inner support frame and the cured adhesive layer improves the structural strength of the single frame, thereby ensuring the performance of the stereoscopic wound core formed by assembling single frames subsequently.

Description

Amorphous alloy three-dimensional wound core and its single frame

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 04, 2019, with the application number 201910271851.2 and the title of the invention "amorphous alloy three-dimensional wound core and its single frame", the entire content of which is incorporated by reference In this application.

Technical field

The invention relates to the technical field of power equipment, in particular to an amorphous alloy three-dimensional wound core and its single frame.

Background technique

Power transformers are electrical equipment widely used in various industries in the national economy. At present, distribution transformers mainly include silicon steel transformers and amorphous alloy transformers. In comparison, amorphous alloy transformers have more significant energy-saving effects.

Amorphous alloy transformer refers to a transformer made with an amorphous alloy iron core. The existing amorphous alloy iron cores mainly include single-phase single frame, three-phase three-frame three-column, three-phase four-frame five-column, and three-dimensional wound iron core. Among them, the three-dimensional wound iron core has a more reasonable structure and better performance. Lower cost and become the first choice for transformer cores.

Amorphous alloy three-dimensional rolled iron core includes three single frames with the same structure. The three core columns formed by the three single frames are arranged in an equilateral triangle three-dimensional arrangement; each single frame is composed of multiple amorphous strips of different sizes After winding and forming, annealing treatment is needed after winding to eliminate internal stress, restore magnetism, and improve the performance of the iron core. Due to the insufficient rigidity of the amorphous strip, it is easy to deform during winding, and it is also easy to deform when it is annealed after winding, and it is also easy to deform when the subsequent three single frames are assembled, making the amorphous alloy three-dimensional wound core The structural strength is not high and affects the performance of the iron core.

In view of this, how to improve the structural strength of the amorphous alloy three-dimensional wound core and ensure its core performance is a technical problem that needs to be solved by those skilled in the art.

Summary of the invention

The purpose of the present invention is to provide a single frame of an amorphous alloy three-dimensional wound iron core, which has high structural strength and can ensure the performance of the iron core formed by the single frame. Another object of the present invention is to provide an amorphous alloy three-dimensional wound core including the single frame.

In order to solve the above technical problems, the present invention provides a single frame of an amorphous alloy three-dimensional wound iron core, which includes a single frame base with a square structure and an inner support frame with an inner hole structure; the single frame base is composed of multiple levels of different widths. The amorphous alloy strip is wound around the outer peripheral wall of the inner support frame, and the amorphous alloy strip is rectangular or trapezoidal; it also includes a cured adhesive layer provided on the outer surface of the single frame base; forming the The viscosity of the cured adhesive of the cured adhesive layer is less than 300Pa·s, the coefficient of thermal expansion is greater than 3ppm/°C, and the shear strength is greater than 0.2MPa.

The single frame of the amorphous alloy three-dimensional wound iron core is provided with an inner support frame at the center of the single frame substrate, and the outer surface of the single frame substrate is coated with a cured adhesive layer. The design of the inner support frame can reduce the amorphous alloy The deformation probability of the tape during winding, and at the same time as a support, can improve the structural strength of the single frame substrate formed by the winding, and the setting of the cured adhesive layer can also improve the structural strength of the single frame. The internal support frame and the cured adhesive layer are combined The structural strength of the single frame is improved, and the performance of the three-dimensional wound core assembled by the single frame is ensured.

In addition, after the amorphous alloy strip is wound around the inner support frame to form a single frame, it needs to undergo heat treatment. After the heat treatment, the amorphous alloy becomes brittle due to structural relaxation and other reasons, and its toughness decreases. Under the action of external force , It is easy to break. After the single frame is provided with a cured adhesive layer on the surface of the single frame substrate, it can not only ensure the structural strength, but also prevent the amorphous fragments from falling into the transformer coil and causing short circuit.

In the single frame as described above, the cured adhesive layer is a cured adhesive layer formed of epoxy adhesive, silica gel, polyurethane, acrylic or ethyl acetate.

In the single frame as described above, the number of stages of the single frame substrate is 7-25.

In the single frame as described above, the inner support frame has a rectangular frame structure;

Alternatively, the inner support frame includes two first side frames arranged in parallel, and both ends of the two first side frames are respectively connected by two second side frames, and the first side frames are linear, so The second side frame is in an arc shape protruding outward, and the structure of the inner support frame is symmetrical;

Alternatively, the inner support frame includes two first side frames arranged at intervals, and both ends of the two first side frames are respectively connected by two second side frames, the first side frame and the second side frame The frames all have an arc-shaped structure protruding outward, and the structure of the inner support frame is symmetrical. In the single frame as described above, the inner support frame is an integral structure or a split splicing structure.

In the single frame as described above, the inner support frame is an inner support frame made of an alloy formed by one or more of iron, aluminum, copper and titanium;

Alternatively, the inner support frame is an inner support frame made of ceramic or silicone resin.

In the single frame as described above, the thickness of the inner support frame is selected in the range of 1 to 15 mm, and the yield strength of the inner support frame is not less than 0.25 MPa.

The single frame as described above further includes an outer support frame fixedly sleeved on the outer peripheral wall of the single frame base.

The single frame as described above also includes more than one interlayer support frame, and the interlayer support frame is located between adjacent two-level amorphous alloy strips of the single frame substrate.

The present invention also provides an amorphous alloy three-dimensional wound iron core, comprising three single frames with the same structure, the three single frames are combined into one body, and the mullions of two adjacent single frames are combined to form a cross section A core post in a circular or polygonal shape, three core posts are arranged in an equilateral triangle, and the core post is used for winding a coil; the single frame is the single frame described in any one of the above.

Since the single frame has the above technical effect, the amorphous alloy three-dimensional wound core including the single frame also has the same technical effect, and the discussion will not be repeated here.

Description of the drawings

FIG. 1 is a schematic structural diagram of a specific embodiment of an amorphous alloy three-dimensional wound core provided by the present invention;

2 is a schematic cross-sectional view of the single frame of the amorphous alloy three-dimensional wound core shown in FIG. 1;

Fig. 3 is a front view of a specific embodiment of a single frame of an amorphous alloy three-dimensional wound core provided by the present invention.

Among them, the one-to-one correspondence between component names and reference signs in Figures 1 to 3 is as follows:

Amorphous alloy three-dimensional rolled iron core 100, core column 101;

Single frame 110, mullion 111;

Single frame base 1101, inner support frame 1102, and cured adhesive layer 1105.

detailed description

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

In order to facilitate understanding and concise description, the following description is combined with the amorphous alloy three-dimensional wound core and its single frame, and the beneficial effects will not be repeated.

Please refer to Figures 1 to 3. Figure 1 is a schematic structural view of a specific embodiment of the amorphous alloy three-dimensional wound core provided by the present invention; Figure 2 is a cross-section of the single frame of the amorphous alloy three-dimensional wound core shown in Figure 1 Schematic diagram; Figure 3 is a front view of a specific embodiment of a single frame of an amorphous alloy three-dimensional wound core provided by the present invention.

In this embodiment, the amorphous alloy three-dimensional wound core 100 includes three single frames 110 with the same structure, and the three single frames 110 are assembled and fixed into one body to form the main structure of the amorphous alloy three-dimensional wound core 100.

Wherein, each single frame 110 has a square structure, each single frame 110 includes two opposite mullion portions 111, the cross section of the outer side of each mullion portion 111 is semicircular or semi-polygonal, and the inner side is a planar structure When merging, the inner sides of the mullion 111 of two adjacent single frames 110 are merged, because the cross section of the outer side of the mullion 111 is semicircular or semi-polygonal, so that after merging, two adjacent single frames The two mullion parts 111 of 110 form a core post 101 with a circular or polygonal cross section, and the core post 101 is used for winding a coil.

It can be understood that because the three single frames 110 have the same structure, the three core posts 101 formed by the three single frames 110 are arranged in an equilateral triangle three-dimensionally, as shown in FIG. 1.

In this embodiment, the single frame 110 includes a single frame base 1101 and an inner support frame 1102 with an inner hole structure. The single frame base 1101 is approximately a square structure, and the single frame base 1101 is specifically made of multi-level amorphous alloy materials with different widths. The belt is wound around the outer peripheral wall of the support frame 1102 to be formed.

Specifically, the first-level amorphous alloy strip is wound around the inner support frame 1102 one by one, and the strip is advanced in the set direction, so that the inner side surface formed after winding is an inclined surface, and the first-level amorphous alloy The material tape is wound to the set thickness, and then the outer layer of the first-level amorphous alloy material coil is wound with another size of the second-level amorphous alloy material and wound in the same way, thus forming a single frame The base body 1101 has a semicircular cross-section on the outer side and a plane with a 30-degree inclination angle on the inner side. In this way, after the three single frames 110 are combined, the combined surfaces are attached, and the core column 101 that can be formed is an equilateral triangle Arrangement.

It can be understood that the number of stages of the single frame base 110 determines the specific shape of the cross section of the outer surface of the mullion portion 111 of the single frame 110 formed by winding. The more the number of stages, the closer the outer surface of the mullion portion 111 is to a circle. However, in actual setting, considering factors such as economy and feasibility of bypassing, the number of stages should not be set too much. In practical applications, the number of stages of the single frame substrate 1101 may preferably be 7-25.

In the specific scheme, the amorphous alloy strips of each stage are in a rectangular or trapezoidal structure.

After the single frame base 1101 and the inner support frame 1102 are set, a cured adhesive layer 1105 is also provided on the outer surface of the single frame base 1101. The outer surface here refers to all the outer surfaces of the single frame base 1101.

Specifically, after the amorphous alloy strip is wound on the inner support frame 1102 to form the single frame base 1101, the inner support frame 1102 and the single frame base 1101 are annealed to eliminate internal stress and improve the performance of the iron core; annealing After completion, a cured adhesive is applied to the entire outer surface of the single frame substrate 1101 to form a cured adhesive layer 1105.

As above, the single frame 110 is provided with an inner support frame 1102 at the center of the single frame substrate 1101, and the outer surface of the single frame substrate 1101 is coated with a cured adhesive layer 1105. The design of the inner support frame 1102 can reduce the amorphous alloy material. The deformation probability of the belt during winding, and at the same time as a support, can improve the structural strength of the wound single frame substrate 1101, prevent the amorphous alloy strip from deforming during annealing treatment, and subsequently set a cured adhesive layer on the single frame substrate 1101 1105 can also improve the structural strength of the single frame 110, that is, the combination of the inner support frame 1102 and the cured adhesive layer 1105 improves the structural strength of the single frame 110, and ensures the performance of the three-dimensional wound core formed by the subsequent single frame 110. .

Since the arrangement of the inner support frame 1102 and the cured adhesive layer 1105 improves the structural strength of the single frame 110, it can also reduce the noise generated by the amorphous alloy three-dimensional wound core 100 due to its own stress in the application to a certain extent.

In addition, after the amorphous alloy strip is wound around the inner support frame 1102 to form the single frame 110, it needs to undergo heat treatment. After the heat treatment, the amorphous alloy becomes brittle due to structural relaxation and other reasons, and its toughness decreases. Under the action, it is fragile. After the single frame 110 is provided with a cured adhesive layer 1105 on the surface of the single frame substrate 1101, it can not only ensure the structural strength, but also prevent the amorphous fragments from falling into the transformer coils and causing short circuits.

Specifically, the viscosity of the cured adhesive forming the cured adhesive layer 1105 is less than 300 Pa·s, the thermal expansion coefficient is greater than 3 ppm/°C, and the shear strength is greater than 0.2 MPa. In this way, it can be ensured that the obtained single frame 110 has better strength and better mechanical properties.

In a specific solution, the cured adhesive used in the cured adhesive layer 1105 is epoxy adhesive, silica gel, polyurethane, acrylic, or ethyl acetate.

In a specific solution, the inner support frame 1102 may be made of iron, aluminum, copper, and titanium, or an alloy material formed of iron, aluminum, copper, and titanium.

The inner support frame 1102 can also be made of ceramic material or made of silicone resin material.

Specifically, the thickness of the inner support frame 1102 can be determined according to different materials, and can be specifically selected in the range of 1-15 mm, as long as the structural strength of the manufactured single frame 110 can be ensured.

During the specific setting, the yield strength of the inner support frame 1102 is not lower than 0.25MPa.

In a specific solution, the shape of the inner support frame 1102 may be arranged in a rectangular structure, as shown in FIG. 3.

The shape of the inner support frame 1102 can also be in other forms. For example, the inner support frame 1102 includes two first side frames arranged in parallel, and the two ends of the two first side frames are respectively connected by two second side frames. One side frame is linear, and the second side frame is an arc-shaped structure that protrudes outward. That is to say, the two opposite sides of the inner support frame 1102 are arc-shaped structures that protrude outward to improve the winding The tension of the single frame base 1101.

In actual installation, the four sides of the inner support frame 1102 can also be designed in an arc-shaped structure that protrudes outward, or the inner support frame 1102 has only one side or adjacent two sides that are arc-shaped outwardly. Structure settings.

Of course, the structure of the inner support frame 1102 is preferably designed symmetrically.

In a specific solution, the inner support frame 1102 may be an integrally formed structure, or may be a spliced structure formed by splicing several sides through a fixed connection such as welding.

In a further solution, on the basis of the inner support frame 1102, the single frame 110 further includes an outer support frame fixedly sleeved on the outer peripheral wall of the single frame base 1101. In this way, the single frame base 1101 is equivalent to clamping the inner support frame 1102 and Between the outer support frames, the structural strength of the single frame 110 can be further improved.

Furthermore, the single frame 110 further includes more than one interlayer support frame, and the interlayer supports are erected between two adjacent amorphous alloy strips of the single frame base 1101.

In the process of winding to form the single frame substrate 1101, for example, it is necessary to set an interlayer support frame between the second-level amorphous alloy strip and the third-pole amorphous alloy strip. After the alloy strip, the interlayer support frame is fixedly sleeved on the outer circumference of the second stage, and the third grade amorphous alloy strip is continuously wound on the outer peripheral wall of the interlayer support frame.

The number of interlayer support frames is determined according to related parameters such as the number of stages of the single frame base 1101 and the thickness of the winding at each stage.

The amorphous alloy three-dimensional wound core and its single frame provided by the present invention have been described in detail above. Specific examples are used in this article to illustrate the principle and implementation of the present invention. The description of the above examples is only used to help understand the method and core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

The single frame of amorphous alloy three-dimensional wound iron core is characterized in that it comprises a single frame substrate with a square structure and an inner support frame with an inner hole structure; the single frame substrate is wound by a multi-level amorphous alloy material strip with different widths. The outer peripheral wall of the inner support frame is formed by winding, the amorphous alloy strip is rectangular or trapezoidal; it also includes a cured adhesive layer provided on the outer surface of the single frame base; the cured adhesive forming the cured adhesive layer Viscosity <300Pa·s, thermal expansion coefficient>3ppm/oC, shear strength>0.2MPa.
The single frame according to claim 1, wherein the cured adhesive layer is a cured adhesive layer formed of epoxy glue, silica gel, polyurethane, acrylic or ethyl acetate.
The single frame according to claim 1, wherein the number of stages of the single frame substrate is 7-25.
The single frame according to claim 1, wherein the inner support frame has a rectangular frame structure;

Alternatively, the inner support frame includes two first side frames arranged in parallel, and both ends of the two first side frames are respectively connected by two second side frames, and the first side frames are linear, so The second side frame is in an arc shape protruding outward, and the structure of the inner support frame is symmetrical;

Alternatively, the inner support frame includes two first side frames arranged at intervals, and both ends of the two first side frames are respectively connected by two second side frames, the first side frame and the second side frame The frames all have an arc-shaped structure protruding outward, and the structure of the inner support frame is symmetrical.
The single frame according to claim 1, wherein the inner support frame is an integrally formed structure or a split splicing structure.
The single frame according to any one of claims 1-5, wherein the inner support frame is an inner support frame made of an alloy formed by one or more of iron, aluminum, copper and titanium;

Alternatively, the inner support frame is an inner support frame made of ceramic or silicone resin.
The single frame according to claim 6, characterized in that the thickness of the inner support frame is selected in the range of 1 to 15 mm, and the yield strength of the inner support frame is not less than 0.25 MPa.
The single frame according to claim 6, further comprising an outer support frame fixedly sleeved on the outer peripheral wall of the single frame base.
The single frame according to claim 6, further comprising more than one interlayer support frame, and the interlayer support frame is located between two adjacent amorphous alloy strips of the single frame base.
Amorphous alloy three-dimensional rolled iron core, including three single frames with the same structure, the three single frames are combined into one body, and the mullion parts of two adjacent single frames are combined to form a core with a circular or polygonal cross section The column, the three core columns are arranged in an equilateral triangle, and the core column is used for winding a coil; it is characterized in that the single frame is the single frame according to any one of claims 1-9.