A brush conductive structure

Abstract

The utility model provides a kind of brush conductive structure, including brush box, the inside of brush box is provided with brush body, and extend from the side of brush box, the other side of brush box is provided with spring pressure plate, screw is inserted and arranged on the spring pressure plate, and screw and brush box are threadedly connected, compression spring is arranged between the spring pressure plate and brush body, two pairs of edges of the brush box are fixedly connected with first connecting lug, two ends of the spring pressure plate are provided with second connecting lug, and fixed through-hole is arranged on the first connecting lug and the second connecting lug.The utility model, by setting second connecting lug, spring baffle can be fixed on equipment, ensure that the position of brush box and spring baffle cannot change relatively.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a brush conductive structure. Background Technology

[0002] With the continuous development of wind farms and the rapid advancement of high-power wind turbines, the maintenance costs of cable twisting after nacelle yaw are increasing, thus yaw slip rings are gaining popularity. As one of the most important components of the slip ring, the brush contacts the slip ring on the slip ring rotor to form a current path. The brush conductive structure generally includes a brush holder, brush, and spring. Currently, the brush conductive structure is mainly designed based on the high-speed rotating slip ring.

[0003] Because the rotor speed of the yaw slip ring is synchronized with the nacelle speed, and the nacelle speed is very low (approximately 0.1 r / min), compared to the brush conductive structure of a high-speed rotating slip ring, the brush conductive structure of the yaw slip ring, due to its low speed, finds it difficult to control the oxide film between the brush and the slip ring within a stable range through high-speed rotating ring surface friction. This leads to a gradual increase in the contact resistance between the brush and the slip ring. Increasing the spring force is an effective means of controlling the contact resistance between the brush and the slip ring. For example, in the patent subject "A Brush Conductive Structure", application number "CN202020240613.3", a cylindrical spring is used to increase the force between the brush body and the slip ring.

[0004] However, in the aforementioned patent, the spring baffle is installed and fixed on the side wall of the brush box hole. However, the side wall of the brush box hole is relatively thin, and the threaded fastening hole is small, resulting in insufficient fixing force on the spring baffle. In particular, the alternating force on the spring baffle generated during the friction of the brush body against the oxide layer can easily cause the spring baffle to loosen. Increasing the bolt specifications will inevitably require increasing the thickness and other dimensions at the connection, which will also increase the space usage. Utility Model Content

[0005] To address the aforementioned problems, this utility model discloses a conductive brush structure, including a brush box. A brush body is housed inside the brush box and extends from one side. A spring pressure plate is located on the other side of the brush box. Screws are inserted into the spring pressure plate and threadedly connected to the brush box. A compression spring is positioned between the spring pressure plate and the brush body. First connecting ears are fixedly connected to both opposite sides of the brush box, and second connecting ears are located at both ends of the spring pressure plate. Both the first and second connecting ears have fixing through holes. The screw connection method allows the brush box and spring pressure plate to be integrated, facilitating transportation and installation. However, since the screws are not the primary stress points of the compression spring, bolts are used during construction to insert and fix the first and second connecting ears, ensuring the brush box and spring pressure plate are securely fixed and will not loosen during long-term use.

[0006] Preferably, a brush braid is fixedly connected to the lower part of the brush body, and a conductive sheet is fixedly connected to the other end of the brush braid. The brush braid is woven from copper wire, ensuring conductivity while having sufficient flexibility to not affect the extension and retraction of the brush body.

[0007] Preferably, the conductive sheet has through holes. Bolts or other connectors are used to pass through the through holes to fix the conductive sheet in place, ensuring good conductivity.

[0008] Preferably, a limiting protrusion is provided at the center of one side of the spring pressure plate, and one end of the compression spring is fitted onto the limiting protrusion. The limiting protrusion limits the movement of the compression spring.

[0009] The beneficial effects of this utility model are as follows: the spring baffle and the brush box are fixed together on the equipment using bolts of the same specification, ensuring that the relative positions of the spring baffle and the brush box remain unchanged, thus improving the stress on the spring baffle. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a perspective view of the present invention.

[0011] List of reference numerals in the attached diagram: 1. Brush body; 2. Brush box; 3. First connecting ear; 4. Second connecting ear; 5. Spring pressure plate; 6. Brush braid; 7. Conductive sheet; 8. Compression spring. Detailed Implementation

[0012] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0013] like Figures 1 to 2As shown, a conductive brush structure includes a brush box 2 with through-holes on both sides. A brush body 1 is disposed inside the brush box 2 and extends from one side, contacting a collector ring for power supply. A spring pressure plate 5 is disposed on the other side of the brush box 2, with screws inserted into the spring pressure plate 5 and threadedly connected to the brush box 2. The brush box 2 and the spring pressure plate 5 are fixedly connected together by the screws (the screw components are not shown in the figure). A compression spring 8 is disposed between the spring pressure plate 5 and the brush body 1, allowing the compression spring 8 to push the brush body 1 out of the brush box 2. First connecting ears 3 are fixedly connected to both opposite sides of the brush box 2, and second connecting ears 4 are disposed at both ends of the spring pressure plate 5. Fixing through holes are provided on both the first and second connecting ears 3, and bolts are inserted into these holes to fix the brush box 2 and the spring pressure plate 5 to the equipment. Since they are both fixed to the equipment, the relative positions of the brush box 2 and the spring pressure plate 5 do not change.

[0014] The lower part of the brush body 1 is fixedly connected to a brush braid 6, which is made of copper wire. This ensures conductivity while its softness does not affect the operation of the compression spring 8. The other end of the brush braid 6 is fixedly connected to a conductive sheet 7, which is used to connect to the power supply part.

[0015] The conductive sheet 7 has through holes, which facilitates the use of bolts or other connections to fix the conductive sheet 7 and ensure good conductivity.

[0016] A limiting protrusion is provided in the middle of one side of the spring pressure plate 5, and one end of the compression spring 8 is fitted at the limiting protrusion, thereby achieving the limiting of the compression spring 8.

[0017] The technical means disclosed in this utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A conductive brush structure, comprising a brush holder (2), wherein a brush body (1) is disposed inside the brush holder (2) and extends from one side of the brush holder (2), and a spring pressure plate (5) is disposed on the other side of the brush holder (2), wherein a screw is inserted through the spring pressure plate (5) and threadedly connected to the brush holder (2), and a compression spring (8) is disposed between the spring pressure plate (5) and the brush body (1), characterized in that: The brush box (2) is fixedly connected to two pairs of sides with first connecting ears (3), and the spring pressure plate (5) is provided with second connecting ears (4) at both ends. The first connecting ears (3) and the second connecting ears (4) are provided with fixed through holes.

2. The conductive structure of a brush according to claim 1, characterized in that: The lower part of the brush body (1) is fixedly connected to a brush braid (6), and the other end of the brush braid (6) is fixedly connected to a conductive sheet (7).

3. The conductive structure of a brush according to claim 2, characterized in that: The conductive sheet (7) is provided with a through hole.

4. The conductive structure of a brush according to claim 1, characterized in that: A limiting protrusion is provided on one side of the spring pressure plate (5), and one end of the compression spring (8) is fitted at the limiting protrusion.

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