An arc-shaped tooth surface machining device and machining method for a stator core of a differential transformer

Abstract

The present invention provides a machining device and a machining method for the arc-shaped tooth surface of a stator core of a differential transformer, belonging to the field of stator core machining. It solves the problems that the stator core of the existing axial magnetic circuit differential transformer is prone to sheet dispersion during machining and it is difficult to machine the arc-shaped tooth surface. It includes screws, pressing blocks, a stator core and a core fixing ring. The number of the stator cores is multiple, and the multiple stator cores are fixedly connected to the core fixing ring. A pressing block is arranged between adjacent stator cores. Each pressing block is provided with a screw penetrating along the radial direction, and the screw abuts against the core fixing ring, and the stator core is tightly pressed and fixed by the pressing block. It is mainly used for machining the stator core of an axial magnetic circuit differential transformer.

Description

Technical Field

[0001] The invention belongs to the field of stator core processing, and particularly relates to a processing device and a processing method for an arc-shaped tooth surface of a stator core for a differential transformer. Background Art

[0002] Traditional differential transformers adopt a radial magnetic circuit structure, and the stator core is formed by axially laminating silicon steel sheets. However, such differential transformers with a radial magnetic circuit have serious problems of axial magnetic leakage. In some special working conditions, differential transformers with an axial magnetic circuit structure need to be used. Since the magnetic circuit is along the axial direction, the stator core of the differential transformer with an axial magnetic circuit structure needs to be laminated along the radial direction. Since the processed stator core formed by lamination is prone to loose pieces under stress, the tooth ends of the stator cores of existing differential transformers with an axial magnetic circuit structure are often of a planar structure and are used for working conditions of a square or planar structure, and cannot be applied to rotating mechanisms. Summary of the Invention

[0003] In order to solve the problems in the prior art, the invention provides a processing device and a processing method for an arc-shaped tooth surface of a stator core for a differential transformer.

[0004] To achieve the above object, the invention adopts the following technical solutions: A processing device for an arc-shaped tooth surface of a stator core for a differential transformer, which includes screws, pressing blocks, a stator core, and a core fixing ring. The number of the stator cores is multiple, and the multiple stator cores are fixedly connected to the core fixing ring. Pressing blocks are arranged between adjacent stator cores. Each pressing block is provided with screws penetrating along the radial direction, and the screws are abutted against the core fixing ring, and the stator cores are pressed and fixed by the pressing blocks.

[0005] Furthermore, the core fixing ring is provided with square holes along the circumferential direction, and the stator core is inserted into the core fixing ring through the square holes for positioning.

[0006] Furthermore, the outer side of the core fixing ring is connected to the outer shell.

[0007] Furthermore, the outer diameter of the core fixing ring and the stator core after connection is equal to the inner diameter of the outer shell.

[0008] Furthermore, each pressing block is provided with two screws, and the two screws are arranged along the axial direction of the pressing block.

[0009] Furthermore, the axial cross-section of the pressing block is an annular sector structure.

[0010] Furthermore, the number of the stator cores is four.

[0011] The invention also provides a processing method for an arc-shaped tooth surface of a stator core for a differential transformer, which includes the following steps:

[0012] Step 1: Install four differential transformer stator cores into the core fixing ring for positioning;

[0013] Step 2: Install the core fixing ring into the housing and place a pressing block between every two adjacent stator cores;

[0014] Step 3: Screw two screws into the pressing block respectively to make the screws tightly press against the core fixing ring, and make the pressing block tightly press the stator core through the surface of the pressing block;

[0015] Step 4: Perform inner hole grinding on the fixed stator core;

[0016] Step 5: Remove the pressing block to obtain an arc-toothed surface stator core without loose sheets.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention solves the problems that the stator core is prone to loose sheets during the processing of the existing axial magnetic circuit differential transformer and it is difficult to process the arc-toothed surface. It provides a stator core anti-loose sheet arc-toothed surface processing device and processing method for the axial magnetic circuit differential transformer with simple structure, high reliability and low cost. The present invention can realize the processing of the arc-toothed surface of the stator core without loose sheets, which provides convenience for the application of axial magnetic circuit devices such as axial magnetic circuit differential transformers under rotating working conditions. Its structure is simple, it is relatively easy to implement, the auxiliary parts are only the pressing block and the screw, the processing is convenient and the cost is low. Description of the Drawings

[0018] Figure 1 It is an exploded structural schematic diagram of a stator core arc-toothed surface processing device for a differential transformer according to the present invention;

[0019] Figure 2 It is an assembled structural schematic diagram of a stator core arc-toothed surface processing device for a differential transformer according to the present invention;

[0020] Figure 3 It is an axial sectional structural schematic diagram of a stator core arc-toothed surface processing device for a differential transformer according to the present invention.

[0021] 1 - Screw, 2 - Pressing block, 3 - Stator core, 4 - Core fixing ring, 5 - Housing. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention.

[0023] See Figures 1-3Description of this embodiment: A machining device for the arc-shaped tooth surface of the stator core of a differential transformer, which includes screw 1, pressing block 2, stator core 3, and core fixing ring 4. The number of stator cores 3 is multiple, and multiple stator cores 3 are fixedly connected to the core fixing ring 4. A pressing block 2 is arranged between adjacent stator cores 3. Each pressing block 2 is provided with a screw 1 penetrating along the radial direction, and the screw 1 abuts against the core fixing ring 4, and the stator core 3 is pressed and fixed by the pressing block 2.

[0024] In this embodiment, the core fixing ring 4 is provided with square holes along the circumferential direction. The stator core 3 is inserted into the core fixing ring 4 through the square holes for positioning. The number of square holes is the same as the number of stator cores 3, and the square holes can just position the stator core 3. The outer side of the core fixing ring 4 is connected to the outer shell 5. The outer diameter after the connection of the core fixing ring 4 and the stator core 3 is equal to the inner diameter of the outer shell 5, so that it can be installed into the outer shell 5. Each pressing block 2 is provided with two screws 1, and the two screws 1 are arranged along the axial direction of the pressing block 2, so that the pressing block 2 can stably press the stator core 3. The axial cross-section of the pressing block 2 is an annular sector structure, and the stator core 3 is pressed by the profile surface of the pressing block 2. In the embodiment, the number of stator cores 3 is four.

[0025] This embodiment is a machining method for the arc-shaped tooth surface of the stator core of a differential transformer, which includes the following steps:

[0026] Step 1: Install four stator cores 3 of the differential transformer into the core fixing ring 4 for positioning;

[0027] Step 2: Install the core fixing ring 4 into the outer shell 5, and place a pressing block 2 between every two adjacent stator cores 3. The size of the pressing block 2 is slightly smaller than the gap between the stator cores 3, and it can be easily placed;

[0028] Step 3: Screw two screws 1 into the pressing block 2 respectively, so that the screws 1 abut against the core fixing ring 4. According to the reaction force, the stator core 3 is pressed by the profile surface of the pressing block 2 through the pressing block 2;

[0029] Step 4: Perform inner hole grinding on the fixed stator core 3;

[0030] Step 5: Remove the pressing block 2 to obtain an arc-shaped tooth surface stator core without loose sheets.

[0031] The above has introduced in detail a machining device and a machining method for the arc-shaped tooth surface of the stator core of a differential transformer provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A machining device for the arc-shaped tooth surface of the stator core of a differential transformer, characterized in that: It includes a screw (1), a pressing block (2), a stator core (3) and a core fixing ring (4). The number of the stator cores (3) is multiple. The multiple stator cores (3) are fixedly connected to the core fixing ring (4). A pressing block (2) is arranged between adjacent stator cores (3). Each pressing block (2) is provided with a screw (1) penetrating therethrough in the radial direction. The screw (1) abuts tightly against the core fixing ring (4). The stator core (3) is pressed and fixed by the pressing block (2). The core fixing ring (4) is provided with a square hole in the circumferential direction. The stator core (3) is inserted into the core fixing ring (4) through the square hole for positioning.

2. The machining device for the arc tooth surface of the stator core of a differential transformer according to claim 1, wherein: The outer side of the core fixing ring (4) is connected to the housing (5).

3. A processing device for the arc-shaped tooth surface of the stator core of a differential transformer according to claim 1, characterized in that: The outer diameter after the connection of the core fixing ring (4) and the stator core (3) is equal to the inner diameter of the housing (5).

4. A processing device for the arc tooth surface of the stator core of a differential transformer according to claim 1, characterized in that: Each pressing block (2) is provided with two screws (1). The two screws (1) are arranged along the axial direction of the pressing block (2).

5. A machining device for the arc tooth surface of the stator core of a differential transformer according to claim 1, characterized in that: The axial cross-section of the pressing block (2) is an annular sector structure.

6. A machining device for the arc-shaped tooth surface of the stator core of a differential transformer according to claim 1, characterized in that: The number of the stator cores (3) is four.

7. A processing method for the arcuate tooth surface of the stator core of a differential transformer as described in claim 1, characterized in that: It includes the following steps: Step 1: Install four differential transformer stator cores (3) into the core fixing ring (4) for positioning; Step 2: Install the core fixing ring (4) into the housing (5), and place a pressing block (2) between every two adjacent stator cores (3); Step 3: Screw two screws (1) into the pressing block (2) respectively, so that the screws (1) abut tightly against the core fixing ring (4), and press the stator core (3) through the surface of the pressing block (2); Step 4: Perform the inner hole grinding treatment on the fixed stator core (3); Step 5: Remove the pressing block (2) to obtain an arc-shaped tooth surface stator core without loose sheets.

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