High voltage electric energy transmission brush assembly and high voltage electric energy transmission system

Abstract

The application discloses a brush assembly for high-voltage electric energy transmission and a high-voltage electric energy transmission system, and relates to the technical field of electric power transmission systems.The brush assembly for high-voltage electric energy transmission comprises a conductor, an insulating support sleeve, a brush fixing terminal and a brush.The conductor is used for transmitting current.The insulating support sleeve is sleeved on the conductor and is used for penetrating through the wall of a shell and being fixed on the shell.The insulating support sleeve inside the shell forms a cantilever structure and extends towards an electric slip ring.The end of the conductor inside the shell extends from the insulating support sleeve.The brush fixing terminal is fixedly arranged on the conductor inside the shell, the brush fixing terminal is in contact with the conductor, and the brush fixing terminal is made of conductive material.The brush is installed on the brush fixing terminal and is used for sliding contact with the conductive surface of the electric slip ring.The application can improve the uniformity of a high-voltage electric field.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transmission system, in particular to a brush assembly for high-voltage power transmission and a high-voltage power transmission system. BACKGROUND

[0002] In the power transmission system, the brush is a key component connecting the fixed part and the rotating part, and its contact stability directly affects the efficiency and reliability of power transmission. In the field of high-voltage equipment, the uniformity of the electric field distribution inside the equipment is crucial and has a decisive influence on whether the equipment can operate safely and stably.

[0003] The traditional brush installation structure is usually a squirrel cage type, and the basic fixed point is located at the top or bottom of the equipment shell. Each transmission channel ring plate is supported and fixed by an insulating support, and then the brush box is fixed on the ring plate. This structure is widely used in low-voltage equipment, but in high-voltage equipment, the complex overall fixed support structure has many parts with edge, insulating and metal material bonding surface, etc., which are prone to field strength concentration phenomenon, greatly increasing the risk of partial discharge, and thus reducing the uniformity of high-voltage electric field. SUMMARY

[0004] The purpose of the present application is to provide a brush assembly for high-voltage power transmission and a high-voltage power transmission system to solve the problems existing in the prior art and improve the uniformity of high-voltage electric field.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] The present application provides a brush assembly for high-voltage power transmission, comprising: a conductor, an insulating support sleeve, a brush fixed terminal and a brush, the conductor is used for transmitting current; the insulating support sleeve is sleeved outside the conductor, the insulating support sleeve is used for penetrating through the wall surface of the shell and fixed on the shell, the insulating support sleeve inside the shell forms a cantilever structure and extends towards the electric slip ring, and the end of the conductor inside the shell extends out of the insulating support sleeve; the brush fixed terminal is fixedly arranged on the conductor inside the shell, the brush fixed terminal and the conductor are in contact, and the brush fixed terminal is made of conductive material; the brush is installed on the brush fixed terminal and used for sliding contact with the conductive surface of the electric slip ring.

[0007] Preferably, the brush is movably arranged on the brush fixed terminal along the direction close to the electric slip ring, and a spring is arranged on the side of the brush away from the electric slip ring. In normal state, the spring is in a compressed state and one end of the spring abuts against the brush to make the brush have a tendency to move towards the electric slip ring.

[0008] Preferably, the spring abuts against the end of the conductor away from the brush.

[0009] Preferably, the spring is provided with an equalizing ring, both ends of the spring are always within the action range of the equalizing ring, and the brush fixing terminal is also within the action range of the equalizing ring.

[0010] Preferably, the equalizing ring is fixedly connected with the brush fixing terminal through a screw.

[0011] Preferably, the insulating support sleeve is provided with a connecting flange for fixed connection with the shell.

[0012] Preferably, one end of the brush fixing terminal is configured with a brush holder capable of clamping the conductor.

[0013] Preferably, the brush is installed on the brush fixing terminal through a semi-annular pressing member, the brush fixing terminal has a horizontally arranged mounting surface, the pressing member is detachably mounted on the mounting surface, the pressing member presses the brush against the mounting surface, and the brush in the pressed state has a tendency to move towards the electric slip ring under the rebounding action of the spring.

[0014] Preferably, the conductor is a copper rod.

[0015] The application further provides a high-voltage electric energy transmission system, which comprises a shell, an electric slip ring and the brush assembly for high-voltage electric energy transmission as described above.

[0016] The application has the following technical effects relative to the prior art:

[0017] The brush assembly for high-voltage electric energy transmission provided by the application is connected with the shell through an independent support structure, which simplifies the support structure, reduces the field intensity concentration points, and further ensures the uniformity of the high-voltage electric field.

[0018] Further, the application uses an equalizing ring to uniformly equalize the electric field between the contact parts of the spring and the conductor, the contact parts of the spring and the brush, and the connecting parts of the brush fixing terminal and the conductor, so as to avoid the field intensity concentration at the connecting parts of the parts and the edges of the parts.

[0019] Further, the application uses a spring to provide the pressing force of the brush and the feed compensation after the brush wears out. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 The structural schematic diagram of the brush assembly for high-voltage electric energy transmission provided by the embodiment of the present application is shown in the figure.

[0022] Figure 2 The structural schematic diagram of the brush assembly for high-voltage electric energy transmission provided by the embodiment of the present application is shown in the figure. Figure 1 In the figure, the structural schematic diagram of the brush assembly for high-voltage electric energy transmission after removing the grading ring is shown.

[0023] Figure 3 The structural schematic diagram of the conductor, the brush fixing terminal, the spring and the brush is shown in the figure.

[0024] Figure 4 The sectional view of the brush assembly for high-voltage electric energy transmission is shown in the figure. Figure 2

[0025] In the figure, 1 is an insulating support sleeve, 2 is a brush, 3 is a grading ring, 4 is a brush fixing terminal, 5 is a conductor, 6 is a connecting flange, 7 is a brush holder, 8 is a pressing part, and 9 is a spring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] The purpose of the present application is to provide a brush assembly for high-voltage electric energy transmission and a high-voltage electric energy transmission system to solve the problems in the prior art and improve the uniformity of high-voltage electric field.

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] ​The existing complex overall fixed support structure (such as the traditional mouse cage type) has a complex structure, so that the electric field is difficult to keep uniform distribution, and it is easy to generate a local field strength far higher than the design value at the edge of the part, the bonding surface of the insulating support and the metal, etc., greatly increasing the risk of partial discharge (corona) and even insulation breakdown. This is the key reason why the present application adopts a single-point cantilever support (insulating support sleeve) and terminal grading ring design, greatly simplifying the structure, reducing the field strength concentration point, and actively controlling the electric field distribution in the key area through the grading ring.

[0030] The embodiments of the present application will be described below in conjunction with Figures 1 to 4 .

[0031] Embodiment One

[0032] The present application provides a brush assembly for high-voltage electric energy transmission, comprising: a conductor 5, an insulating support sleeve 1, a brush fixed terminal 4 and a brush 2, the conductor 5 is used for transmitting current; the insulating support sleeve 1 is sleeved outside the conductor 5, the insulating support sleeve 1 is used for penetrating through the wall surface of the shell and is fixed on the shell, the insulating support sleeve 1 inside the shell forms a cantilever structure and extends towards the electric slip ring, and the end of the conductor 5 inside the shell extends out of the insulating support sleeve 1; the brush fixed terminal 4 is fixedly arranged on the conductor 5 inside the shell, the brush fixed terminal 4 and the conductor 5 are in contact, and the brush fixed terminal 4 is made of conductive material; the brush 2 is installed on the brush fixed terminal 4 and is used for sliding contact with the conductive surface of the electric slip ring.

[0033] In this embodiment, the current on the electric slip ring is transmitted to the equipment outside the shell in turn through the brush 2, the brush fixed terminal 4 and the conductor 5.

[0034] The brush assembly for high-voltage electric energy transmission provided by the present application is connected with the shell by using an independent support structure, which simplifies the support structure, reduces the field strength concentration point, and further ensures the uniformity of the high-voltage electric field.

[0035] In some examples, the brush fixed terminal 4 is made of copper alloy conductive material.

[0036] In some embodiments, the brush 2 is movably arranged on the brush fixed terminal 4 along the direction close to the electric slip ring, and a spring 9 is arranged on the side of the brush 2 away from the electric slip ring, in the normal state, the spring 9 is in a compressed state and one end of the spring 9 abuts against the brush 2 to make the brush 2 have a tendency to move towards the electric slip ring.

[0037] The present application uses the spring 9 to provide the pressing force of the brush 2 and the feed compensation after the brush 2 wears out.

[0038] In some embodiments, one end of the spring 9 away from the brush 2 abuts against the end of the conductor 5.

[0039] The spring 9 in the application is made of metal, which can also bear part of the current transmission. Further increase the current transmission path, thereby improving the stability of current transmission.

[0040] In some examples, the brush 2 is fixedly provided with a limiting sleeve at one end of the conductor 5, and at least part of the spring 9 is located in the limiting sleeve, which is used to limit the spring 9 to avoid deflection.

[0041] In some examples, the spring 9 is provided with an equalizing ring 3, and the two ends of the spring 9 are always within the action range of the equalizing ring 3, and the brush fixed terminal 4 is located within the action range of the equalizing ring 3. It can be understood that the connection between the brush fixed terminal 4 and the conductor 5, and the connection between the brush fixed terminal 4 and the brush 2 are all located within the action range of the equalizing ring 3.

[0042] The embodiment of the application adopts the equalizing ring 3 to uniformly distribute the electric field between the contact parts of the spring 9 and the conductor 5, the contact parts of the spring 9 and the brush 2, and the connection parts of the brush fixed terminal 4 and the conductor 5, avoiding the field strength concentration at the connection parts and the edges of the parts.

[0043] The action range therein is the range in which the equalizing ring 3 can uniformly distribute the electric field.

[0044] It should be noted that, Figure 1 The equalizing ring 3 in the above is not a complete equalizing ring 3, and only half of the structure is shown for the convenience of clearly showing the structure inside the equalizing ring 3. It can be understood that the equalizing ring 3 in the embodiment is a complete closed ring structure.

[0045] In some examples, the equalizing ring 3 is a hollow structure or a solid structure.

[0046] In some examples, the equalizing ring 3 is fixedly connected with the brush fixed terminal 4 through a screw.

[0047] Specifically, the equalizing ring 3 is connected with a connecting plate strip inside, the connecting plate strip extends to the upper side or the lower side of the brush fixed terminal 4, and the connecting plate strip is fixedly connected with the brush fixed terminal 4 through a screw. And the connecting plate strip is also located within the action range of the equalizing ring 3.

[0048] As shown in Figure 3 The upper side of the brush fixed terminal 4 is provided with a threaded hole, which is used to cooperate with the screw to fixedly connect the connecting plate strip.

[0049] In some examples, the insulating support sleeve 1 is provided with a connecting flange 6 outside, and the connecting flange 6 is used to fixedly connect with the shell.

[0050] The embodiment provides a connection mode of the insulating support sleeve 1 and the shell.

[0051] In some embodiments, one end of the brush fixing terminal 4 is configured with a brush holder 7 capable of being clamped on the conductor 5.

[0052] This embodiment provides a connection mode of the brush fixing terminal 4 and the conductor 5.

[0053] Specifically, the brush holder 7 has an opening, and the brush holder 7 has a certain elastic deformation capacity, which is to facilitate the sleeve of the brush holder 7 on the conductor 5. After the sleeve of the brush holder 7 on the conductor 5, the two sides of the opening of the brush holder 7 are connected through screws or bolts, and the two sides of the opening are made close to each other by screwing the screws or bolts to press on the conductor 5 and thus realize the fixation.

[0054] In some embodiments, the brush 2 is installed on the brush fixing terminal 4 through a semi-annular pressing piece 8, the brush fixing terminal 4 has a horizontally arranged mounting surface, and the pressing piece 8 is detachably mounted on the mounting surface. The pressing piece 8 presses the brush 2 on the mounting surface, and the brush 2 in the pressing state has a tendency to move towards the electric slip ring under the rebounding action of the spring 9.

[0055] This embodiment provides a mounting structure of the brush, wherein the pressing piece 8 is also located within the action range of the equalizing ring 3.

[0056] In some embodiments, the conductor 5 is a copper rod.

[0057] This embodiment provides the structure of the conductor 5, and specifically, the conductor 5 can also be made of other metal materials.

[0058] The insulating support sleeve 1 in the embodiment of the present application is fixedly pressed on the equipment shell through the connecting flange 6 and extends to the brush fixing point in the shell, the insulating support sleeve 1 is designed to have sufficient rigidity, the external insulating material ensures the insulation performance between the equipment shell and the high-voltage passage, and the internal copper rod serves as the conductor 5 for the connection and fixation of the brush fixing terminal and the transmission of electric energy.

[0059] Embodiment two

[0060] The present application provides a high-voltage electric energy transmission system, which comprises a shell, an electric slip ring and the brush assembly for high-voltage electric energy transmission as described in the embodiment one; the brush assembly for high-voltage electric energy transmission is arranged on the wall surface of the shell, the electric slip ring is located in the shell, and the brush 2 of the brush assembly for high-voltage electric energy transmission is always in contact with the conductive surface of the electric slip ring.

[0061] In this embodiment, the current on the electric slip ring is transmitted to the equipment outside the shell in sequence through the brush 2, the brush fixing terminal 4 and the conductor 5. The brush assembly for high-voltage electric energy transmission provided by the present application adopts an independent support structure connected with the shell, which simplifies the support structure, reduces the field strength concentration point, and thus ensures the uniformity of the high-voltage electric field.

[0062] In addition, the embodiment has all the advantages of Embodiment One, which will not be repeated here.

[0063] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] If the present application discloses or involves parts or structural members that are fixedly connected to each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, connected by bolts or screws), or as: non-detachable fixed connection (for example, riveting, welding), of course, the fixed connection can also be replaced by integral structure (for example, manufactured by integral forming process) (except for obvious cases that cannot be replaced by integral forming process).

[0065] In addition, the meaning of the terms used to represent the positional relationship or shape in any technical solution disclosed in the present application includes the approximate, similar or close state or shape, unless otherwise stated.

[0066] Any component provided by the present application can be assembled from multiple individual components, or it can be a single component manufactured by integral forming process.

[0067] It should be noted that the structure, proportion, size, etc. shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and do not define the limiting conditions for the implementation of the present application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0068] It should be noted that the same reference signs in the embodiments of the present application represent the same component or the same part.

[0069] Any adaptive changes according to actual needs are within the scope of protection of the present application.

[0070] It is apparent that a person skilled in the art can, without departing from the scope of the application, make many modifications to the details of the above-described exemplary embodiments of the application. The application is therefore not limited to the details given hereinabove but can be implemented in other forms without departing from the spirit or essential characteristic of the application. The embodiments shall therefore be considered in all respects as illustrative and not restrictive; the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims shall be considered to limit the scope of the claims in question to the corresponding parts depicted in the figures of the application.

[0071] The above description of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form described. Many modifications and variations are possible in light of this teaching. It was chosen and described in order to provide the best illustration of the principles of the application and the practical application and to enable others skilled in the art to utilize the application in various embodiments and with various modifications being suited to the particular use contemplated. Thus, the scope of the application should be determined not with reference to the above description, but should be given with reference to the appended claims, along with their full scope of equivalents.

Claims

1. A brush assembly for high-voltage power transmission, characterized in that: include: Conductor (5) for transmitting current; the conductor (5) is a copper rod; An insulating support sleeve (1) is sleeved outside the conductor (5). The insulating support sleeve (1) is used to pass through the wall of the outer shell and be fixed on the outer shell. The insulating support sleeve (1) located inside the outer shell forms a cantilever structure and extends toward the electric slip ring. The end of the conductor (5) located inside the outer shell extends out from the insulating support sleeve (1). The brush fixing terminal (4) is fixedly disposed on the conductor (5) inside the housing. The brush fixing terminal (4) is in contact with the conductor (5). The brush fixing terminal (4) is made of conductive material. A brush (2) is mounted on the brush fixing terminal (4) for sliding contact with the conductive surface of the slip ring. The brush (2) is movably disposed on the brush fixing terminal (4) along the direction close to the slip ring. A spring (9) is disposed on the side of the brush (2) away from the slip ring. Under normal conditions, the spring (9) is in a compressed state and one end of the spring (9) abuts against the brush (2) so that the brush (2) has a tendency to move toward the slip ring. The end of the spring (9) away from the brush (2) abuts against the end of the conductor (5). A voltage equalization ring (3) is provided on the outer sleeve of the spring (9). Both ends of the spring (9) are always within the range of action of the voltage equalization ring (3), and the brush fixing terminal (4) is also within the range of action of the voltage equalization ring (3).

2. The brush assembly for high-voltage power transmission according to claim 1, characterized in that: The equalizing ring (3) is fixedly connected to the brush fixing terminal (4) by screws.

3. The brush assembly for high-voltage power transmission according to claim 1, characterized in that: The insulating support sleeve (1) is provided with a connecting flange (6), which is used to fix it to the outer shell.

4. The brush assembly for high-voltage power transmission according to claim 1, characterized in that: One end of the brush fixing terminal (4) is equipped with a brush holder (7), which can be clamped onto the conductor (5).

5. The brush assembly for high-voltage power transmission according to claim 2, characterized in that: The brush (2) is mounted on the brush fixing terminal (4) by a semi-circular clamping member (8). The brush fixing terminal (4) has a horizontally set mounting surface. The clamping member (8) is detachably mounted on the mounting surface. The clamping member (8) presses the brush (2) against the mounting surface. Under the rebound action of the spring (9), the brush (2) in the clamped state tends to move towards the slip ring.

6. A high-voltage power transmission system, characterized in that: The device includes a housing, an electric slip ring, and a high-voltage power transmission brush assembly as described in any one of claims 1 to 5; the high-voltage power transmission brush assembly is disposed on the wall surface of the housing, the electric slip ring is located inside the housing, and the brush (2) of the high-voltage power transmission brush assembly is always in contact with the conductive surface of the electric slip ring.

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