Slip ring chamber with double-carbon-brush structure and cooling structure and application of slip ring chamber

Abstract

The invention belongs to the field of wind power generation, and relates to a slip ring chamber with a double-carbon-brush structure and a cooling structure and application of the slip ring chamber. Comprising a slip ring chamber shell, a double-carbon-brush structure is arranged in the slip ring chamber shell, a plurality of excitation devices are arranged on a mounting cylinder, each excitation device comprises a current-conducting plate arranged on the mounting cylinder in a surrounding mode and slip rings arranged on the left side and the right side of the current-conducting plate, and a plurality of carbon brushes are arranged on the upper half circle of each slip ring; a first cooling fan and a second cooling fan are symmetrically arranged on the inclined upper portion of the slip ring chamber shell, a dust removal box is arranged below the slip ring chamber shell, cooling air of the first cooling fan and cooling air of the second cooling fan form symmetrical cooling air paths, and the cooling air paths flow through the excitation assembly and then flow to the dust removal box. By adopting the scheme, the problems that the number of common slip ring carbon brushes is increased, the arrangement is difficult, the length of the slip ring is increased, the heat dissipation of a slip ring system is non-uniform and the temperature of the carbon brushes is too high due to rotor current increase caused by single-machine power increase at present can be solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of wind power generation and relates to a slip ring chamber with a double-carbon-brush structure and a cooling structure and application thereof. BACKGROUND

[0002] In the field of wind power generation, a doubly-fed wind power generator has become one of the mainstream models due to its high power generation efficiency and flexible speed regulation characteristics. The core component, a slip ring chamber, is a key channel for transmitting rotor excitation current, and realizes power transmission through dynamic contact between a carbon brush and a rotating slip ring.

[0003] With the substantial increase in the single-machine power of wind power generators in recent years, the rotor current is increased. In the face of the large-current working condition of the doubly-fed unit, the single-ring carbon brush scheme adopted in the prior art needs to bear all the excitation current, which leads to excessively high current density on the contact surface, accelerates the wear of the carbon brush and causes local overheating, and the wear of the slip ring is relatively serious. Therefore, it is necessary to reduce the current density and cool the slip ring and the carbon brush to timely remove the generated heat.

[0004] However, the combination of a rotor terminal box and a centrifugal fan is generally adopted for cooling in the prior art, which highlights certain disadvantages. On the one hand, the cost investment is increased, and additional electrical wiring is needed. On the other hand, the increase in the number of carbon brushes increases the wind resistance, and the one-way airflow formed by the upper air inlet and the lower air outlet cannot effectively reduce the temperature of the slip ring brush holder, and the carbon powder removal efficiency is also poor. SUMMARY

[0005] The application aims to overcome the disadvantages of the prior art and provides a slip ring chamber with a double-carbon-brush structure and a cooling structure and application thereof.

[0006] In a first aspect, the application discloses a slip ring chamber with a double-carbon-brush structure and a cooling structure, comprising a slip ring chamber shell, a double-carbon-brush structure is arranged in the slip ring chamber shell, the double-carbon-brush structure comprises a mounting cylinder, a plurality of groups of excitation devices are arranged on the mounting cylinder, each group of excitation devices comprises a conductive plate arranged around the mounting cylinder, and a slip ring arranged on the left and right sides of the conductive plate, a plurality of carbon brushes are arranged on the upper half of the slip ring, a plurality of conductive columns are arranged on the conductive plate, and the conductive columns penetrate the slip ring. A first cooling fan and a second cooling fan are symmetrically arranged above the slip ring chamber shell, a dust removal box is arranged below the slip ring chamber shell, the cooling air of the first cooling fan and the second cooling fan forms a symmetrical cooling air path, and the cooling air path flows to the dust removal box after flowing through the excitation assembly.

[0007] Further, the sliding ring chamber shell is provided with a first air deflector, a second air deflector and a third air deflector, the first air deflector is located between the first cooling fan and the second cooling fan, and the second air deflector and the third air deflector are obliquely arranged on the two sides of the sliding ring chamber shell.

[0008] Further, one end of the double-carbon-brush structure is provided with a mounting plate, the other end of the double-carbon-brush structure is provided with a support rod, the rear plate of the sliding ring chamber shell is connected with the mounting plate, the front end of the sliding ring chamber shell is provided with an inner partition plate, the inner partition plate is fixedly provided with a fixed plate, and the fixed plate is connected with the support rod.

[0009] Further, the mounting cylinder is provided with an insulating partition, and the insulating partition is located on the two sides of each excitation device.

[0010] Further, the longitudinal section of the sliding ring chamber shell is octagonal, the sliding ring chamber shell is provided with a first cover plate and a second cover plate on the left and right sides, the sliding ring chamber shell is provided with a third cover plate on the upper side, and the sliding ring chamber shell is provided with a first wire inlet plate and a second wire inlet plate obliquely below, and the first cover plate, the second cover plate and the third cover plate are all movably connected.

[0011] Further, the first wire inlet plate and the second wire inlet plate are provided with waterproof joints, the sliding ring is provided with a cable interface, and the cable connected with the cable interface is led out through the waterproof joint.

[0012] Further, the wire inlet plate and the sliding ring chamber shell are fixedly connected through bolts.

[0013] Further, one end of the sliding ring chamber shell is provided with a support column, and the sliding ring chamber shell is connected with the generator body through the support column.

[0014] Further, the first cooling fan and the sliding ring chamber shell are fixedly connected through bolts, the second cooling fan and the sliding ring chamber shell are fixedly connected through bolts, and the dust removal box and the sliding ring chamber shell are fixedly connected through bolts, the first cooling fan, the second cooling fan and the sliding ring chamber shell are all sealed through an annular support frame, and the dust removal box and the sliding ring chamber shell are sealed through a sealing rubber strip.

[0015] In the second aspect, the application discloses an application of the sliding ring chamber with the double-carbon-brush structure and the cooling structure in a double-fed wind power generator.

[0016] Compared with the prior art, the application has the following beneficial effects: The application is suitable for super-power double-fed wind power generator, aiming at the problems of rotor current increase caused by current single machine power increase, and then causing the increase of ordinary slip ring carbon brush number, difficult arrangement, increase of slip ring length, and uneven heat dissipation of slip ring system, and high temperature of carbon brush, the application provides a slip ring chamber with double ring carbon brush structure and a cooling structure scheme, which can effectively reduce the current density of carbon brush and slip ring, increase the axial arrangement space of carbon brush and improve the reliability, and improve the heat dissipation efficiency, and provide more choices for high-power generator technical route. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings herein are incorporated into the specification and form part of the specification, which together with the specification serve to explain the principles of the application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a schematic diagram of the double ring carbon brush structure of the application. Figure 2 It is a cross-sectional view of the double ring carbon brush structure of the application. Figure 3 It is a structure diagram of the slip ring chamber of the application. Figure 4 It is a side view of the slip ring chamber of the application. Figure 5 It is a wind path diagram of the slip ring chamber of the application.

[0020] Wherein: 1 is a carbon brush; 2 is a conductive column; 3 is a slip ring; 4 is a conductive plate; 5 is a mounting plate; 6 is an insulating partition; 7 is a support rod; 8 is a slip ring chamber shell; 9 is a fixed plate; 10-1 is a first cover plate; 10-2 is a second cover plate; 11 is a third cover plate; 12 is a double carbon brush structure; 13-1 is a first cooling fan; 13-2 is a second cooling fan; 14 is an incoming line plate; 15 is a dust removal box; 16 is a cable interface; 17 is an inner partition; 18 is a support column; 19 is a waterproof joint; 20 is an air inlet window; 21 is a first air deflector; 22 is a second air deflector; 23 is a third air deflector. DETAILED DESCRIPTION

[0021] Hereinafter, the exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are only examples of some aspects of the present application detailed in the appended claims.

[0022] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be described in further detail below in conjunction with the drawings and examples.

[0023] Embodiment 1 In a first aspect, the present application discloses a slip ring chamber with double carbon brush structure and cooling structure, comprising a slip ring chamber shell 8, a double carbon brush structure 12 is arranged in the slip ring chamber shell 8, the double carbon brush structure 12 comprises a mounting cylinder, a plurality of groups of excitation devices are arranged on the mounting cylinder, each group of excitation devices comprises a conductive plate 4 arranged around the mounting cylinder, and a slip ring 3 arranged on the left and right sides of the conductive plate 4, a plurality of carbon brushes 1 are arranged on the upper half of the slip ring 3, a plurality of conductive columns 2 are arranged on the conductive plate 4, and the conductive column 2 penetrates the slip ring 3. Specifically, as shown in the figure, the carbon brush 1 is connected with the user cable through the corresponding conductive plate 4, the slip ring 3 is connected with the generator through the corresponding conductive column 2, the conductive column 2 penetrates the slip ring 3, in a group of excitation assemblies, the slip ring 3 is arranged on the two sides of the conductive plate 4, which can solve the problems of heat dissipation and processing difficulty at the same time; the conductive column 2 is connected in series with the slip ring 3, and is isolated from other slip rings 3 through an insulating ceramic sleeve arranged on the conductive column 2; the slip ring 3 is connected with the rotating shaft of the generator through the inner cylinder at the center of the slip ring, and rotates with the rotating shaft. Figure 1 As shown in the figure, the insulating partition 6 divides the mounting cylinder into three areas, two slip rings 3 are arranged on the two sides of the conductive plate 4 in each area, and are connected in parallel with the same phase of the generator, so that the heat dissipation area can be expanded by several times, and the current density can be dispersed.

[0024] As shown in the figure, the insulating partition 6 divides the mounting cylinder into three areas, two slip rings 3 are arranged on the two sides of the conductive plate 4 in each area, and are connected in parallel with the same phase of the generator, so that the heat dissipation area can be expanded by several times, and the current density can be dispersed. Figure 2 The upper oblique side of the slip ring chamber shell 8 is symmetrically provided with a first cooling fan 13-1 and a second cooling fan 13-2, a dust removal box 15 is arranged below the slip ring chamber shell 8, the cooling air of the first cooling fan 13-1 and the second cooling fan 13-2 forms a symmetrical cooling air path, and the cooling air path flows through the excitation assembly and then flows to the dust removal box 15. Specifically, as shown in the figure, the carbon brush 1 is connected with the user cable through the corresponding conductive plate 4, the slip ring 3 is connected with the generator through the corresponding conductive column 2, the conductive column 2 penetrates the slip ring 3, in a group of excitation assemblies, the slip ring 3 is arranged on the two sides of the conductive plate 4, which can solve the problems of heat dissipation and processing difficulty at the same time; the conductive column 2 is connected in series with the slip ring 3, and is isolated from other slip rings 3 through an insulating ceramic sleeve arranged on the conductive column 2; the slip ring 3 is connected with the rotating shaft of the generator through the inner cylinder at the center of the slip ring, and rotates with the rotating shaft.

[0025] Figure 5 ​As shown, the first cooling fan 13-1 and the second cooling fan 13-2 provide air source to the slip ring chamber through the inner partition 17, forming two symmetrical cooling air paths between the first air deflector 21, the second air deflector 22, the third air deflector 23 and the double carbon brush structure 12, flowing through each group of carbon brushes 1, converging at the bottom and then entering the dust removal box 15 for filtration, and finally entering the atmosphere through the cabin wall to dissipate heat. Among them, the first air deflector 21 divides the incoming air into two loops, which do not interfere with each other, and the second air deflector 22 and the third air deflector 23 cooperate with the support column 18 to make each air flow concentrated through the double carbon brush structure 12 and then flow out of the dust removal box 15, reducing the loss of air from the gap between the double carbon brush structure 12 and the inner wall of the slip ring chamber shell 8; and the symmetrical structure of the slip ring chamber and the symmetrical arrangement of the item 1 can make it better in the range of the air path of the two cooling fans, which is conducive to the heat dissipation of the carbon brush, the cleaning of the carbon powder and the current equalization effect of different carbon brushes.

[0026] Further, the first air deflector 21, the second air deflector 22 and the third air deflector 23 are arranged in the slip ring chamber shell 8, the first air deflector 21 is located between the first cooling fan 13-1 and the second cooling fan 13-2, and the second air deflector 22 and the third air deflector 23 are arranged on the two sides of the slip ring chamber shell 8.

[0027] Further, one end of the double carbon brush structure 12 is provided with a mounting plate 5, the other end of the double carbon brush structure 12 is provided with a support rod 7, the rear plate of the slip ring chamber shell 8 is connected with the mounting plate 5, the front end of the slip ring chamber shell 8 is provided with an inner partition 17, and the inner partition 17 is fixed with a fixed plate 9 connected with the support rod 7.

[0028] Specifically, the entire double carbon brush structure 12 is connected with the slip ring chamber shell 8 through the mounting plate 5 and connected with the fixed plate 9 of the slip ring chamber through the support rod 7, which is used for fixing the rear end of the slip ring device and avoiding the risk of sagging caused by the overlong cantilever of the brush holder.

[0029] Further, the mounting cylinder is provided with an insulating partition 6 located on the two sides of each group of excitation devices.

[0030] Further, the longitudinal section of the slip ring chamber shell 8 is octagonal, the first cover plate 10-1 and the second cover plate 10-2 are arranged on the left and right sides of the slip ring chamber shell 8, the third cover plate 11 is arranged on the upper side of the slip ring chamber shell 8, the first incoming line plate 14-1 and the second incoming line plate 14-2 are arranged obliquely below the slip ring chamber shell 8, and the first cover plate 10-1, the second cover plate 10-2 and the third cover plate 11 are all movably connected.

[0031] Specifically, as shown in FIG. 1, the double carbon brush structure 12 is arranged in the slip ring chamber shell 8, and the double carbon brush structure 12 is arranged in the form of a double carbon brush structure 12. Figure 3As shown, the longitudinal section of the slip ring chamber shell 8 is polygonal (octagonal or other shapes are also available) for forming a cooling air path to cool the slip ring device; The first cooling fan 13-1 and the second cooling fan 13-2 are fixedly installed on the side of the slip ring chamber shell 8 for providing a cooling air source; The support column 18, the waterproof joint 19 and the air inlet window 20 are installed on the inner side for guiding the cooling air blown by the two cooling fans to the slip ring device to reduce the temperature of the carbon brush 1 and the slip ring 3; The inner partition plate 17 is installed on the inner side of the slip ring chamber shell 8, and the fixed plate 9 is fixed thereon; The dust removal box 15 is installed below the slip ring chamber shell 8, and the cooling air of the two cooling fans flows through the double carbon brush structure 12 to reduce the temperature of the double carbon brush structure 12 while carrying the carbon powder rubbed by the carbon brush, which is collected by the filter in the dust removal box 15 and then discharged from the cabin. The first cover plate 10-1 and the second cover plate 10-2 are respectively fixedly installed on the upper side and the left and right sides of the slip ring chamber shell 8, and the fixed plate on the upper side of the slip ring chamber shell 8 is the third cover plate 11, which facilitates the replacement of the carbon brush during operation and maintenance.

[0032] Further, the first incoming line plate 14-1 and the second incoming line plate 14-2 are provided with waterproof joints, and the slip ring 3 is provided with a cable interface, and the cable connected by the cable interface is led out through the waterproof joint.

[0033] Specifically, the rotor terminal box is cancelled, the first incoming line plate 14-1 and the second incoming line plate 14-2 are fixedly installed below the side of the slip ring chamber shell 8, the rotor current is led out through the connecting cable between the cable interface 16 and the waterproof joint 19, and the rotor terminal box copper bar and other switching accessories are saved. Further, the incoming line plate 14 is fixed with the slip ring chamber shell 8 by bolts.

[0034] Further, one end of the slip ring chamber shell 8 is provided with an inner partition plate 17, and the fixed plate 9 is located on the inner partition plate 17.

[0035] Further, one end of the slip ring chamber shell 8 is provided with a support column 18, and the slip ring chamber shell 8 is connected with the generator body through the support column 18.

[0036] Further, the first cooling fan 13-1 and the slip ring chamber shell 8 are fixed by bolts, the second cooling fan 13-2 and the slip ring chamber shell 8 are fixed by bolts, and the dust removal box 15 and the slip ring chamber shell 8 are fixed by bolts; The first cooling fan 13-1, the second cooling fan 13-2 and the slip ring chamber shell 8 are all sealed by an annular support frame, and the dust removal box 15 and the slip ring chamber shell 8 are sealed by a sealing rubber strip.

[0037] Specifically, as shown in FIG. 1, the first cover plate 10-1 and the second cover plate 10-2 are respectively fixedly installed on the upper side and the left and right sides of the slip ring chamber shell 8, and the fixed plate on the upper side of the slip ring chamber shell 8 is the third cover plate 11, which facilitates the replacement of the carbon brush during operation and maintenance. Figure 4As shown, the slip ring chamber shell 8 is fixed with the generator body through the support column 18 with stud inside; the incoming line plate 14 is fixed with the slip ring chamber shell 8 through bolts; the inner partition plate 17 is connected with the slip ring chamber shell 8 through welding; the first air baffle 21, the second air baffle 22 and the third air baffle 23 are connected with the corresponding cover plates through bolts; the two cooling fans and the dust removal box 15 are fixed with the slip ring chamber shell 8 through bolts, and the sealing rubber strips and the annular support frame are arranged at the middle connection positions to increase the sealing and strengthen the support, and reduce the vibration during the operation of the cooling fan.

[0038] In summary, as shown in the description above, Figure 1 、 Figure 2 The double-ring carbon brush slip ring structure mainly consists of carbon brushes 1, conductive columns 2, slip rings 3, conductive plates 4, mounting plates 5, insulation separators 6 and support rods 7. When the generator operates, the rotor current generated is transmitted to the corresponding slip rings 3 through the conductive columns 2, the slip rings 3 rotate with the rotation of the generator shaft, the insulation separators 6 divide the mounting cylinder into three areas according to different phases, each phase rotor current corresponds to two slip rings 3 and two groups of carbon brushes 1, which are located on both sides of the conductive plate 4, the carbon brush 1 is in sliding contact with the corresponding slip ring 3, and the rotor current is transmitted to the corresponding conductive plate 4, and the conductive plate 4 guides the rotor current out through the cable connected thereto. Among them, the carbon brush 1 is located in the upper half of the conductive plate 4, which is conducive to reducing the accumulation of carbon powder. The double-ring carbon brush structure adopted by the present application can reduce the current density and heat generation, increase the heat dissipation area, and reduce the wear risk of the slip ring, so as to adapt to the increase of the rotor current caused by the gradual increase of the single machine capacity of the fan. Due to the increase of the rotor current, the overall length of the slip ring increases, the entire slip ring device is connected with the slip ring chamber through the mounting plate 5, and the connection of the support rod 7 and the slip ring chamber fixing plate 9 is increased, which is used for fixing the front and rear ends of the slip ring device, so as to avoid the risk of sagging caused by the overlong cantilever of the brush holder.

[0039] As shown in the description above, Figure 3 、 Figure 4 、 Figure 5As shown, the slip ring chamber structure is mainly composed of a slip ring chamber shell 8 and a third air deflector 23, and a double carbon brush structure 12 is arranged inside the slip ring chamber shell 8; symmetric air inlet windows 20 are arranged on the upper side of the slip ring chamber shell 8, and the air inlet windows 20 are communicated with two cooling fans; a dust removal box 15 is arranged at the bottom of the slip ring chamber shell 8 to remove dust and air, and the dust removal box 15 is communicated with the outside; a wire inlet plate 14 and a waterproof joint 19 are arranged at the lower side of the slip ring chamber shell 8, a cable interface 16 is arranged on the double carbon brush structure 12, and the cable interface 16 is connected with the waterproof joint 19 to lead out the rotor current along a straight line; first, second and third cover plates 10-1, 10-2 and 11 are arranged on both sides and the upper part of the slip ring chamber shell 8, and the inner sides of the first, second and third cover plates 10-1, 10-2 and 11 are provided with first, second and third air deflectors 21, 22 and 23 for guiding the air path; an inner partition plate 17 is welded inside the slip ring chamber shell 8, and a support rod 7 on the double carbon brush structure 12 is connected through a fixing plate 9 on the inner partition plate 17 to fix the rear end of the slip ring device.

[0040] The second and third air deflectors 22 and 23 form a certain angle to guide the air path to blow towards the slip ring and out from the lower side; for the convenience of internal maintenance in the later period, when maintenance is needed, the first, second and third cover plates 10-1, 10-2 and 11 can be removed for repair operation, and the outer shape size of the air deflector should be smaller than the window size of the cover plate for the convenience of dismounting the first, second and third cover plates 10-1, 10-2 and 11; the closest distance between the first, second and third air deflectors 21, 22 and 23 and the double carbon brush structure 12 is 15 mm, which does not affect the operation of the double carbon brush structure 12; the slip ring chamber is fixed with the generator body through a support column 18, and the support column 18 has a double-headed stud; the two cooling fans and the dust removal box 15 are bolted with the slip ring chamber shell 8, and a sealing rubber strip and an annular support frame are arranged at the middle connection to increase the sealing and strengthen the support, and reduce the vibration of the two cooling fans during operation.

[0041] When the generator is normally operated under rated load, a large amount of heat is generated, the two cooling fans introduce air into the slip ring chamber through the inner partition plate 17, and a cooling air path is formed between the first, second and third air deflectors 21, 22 and 23 and the double carbon brush structure 12, which flows through each group of carbon brushes 1 and out of the dust removal box 15, and finally enters the atmosphere through the cabin wall to dissipate heat. Among them, the first air deflector 21 divides the air inlet into two left and right circuits without interference, and the second and third air deflectors 22 and 23 cooperate with the support column 18 to make each air path flow through the double carbon brush structure 12 and out of the dust removal box 15, reducing the loss of air from the gap between the double carbon brush structure 12 and the inner wall of the slip ring chamber shell 8; and the symmetrical structure of the slip ring chamber and the symmetrical arrangement of the carbon brushes 1 can make them better in the air path range of the two cooling fans, which is conducive to the heat dissipation of the carbon brushes, the cleaning of the carbon powder and the current equalization effect of different carbon brushes.

[0042] In a second aspect, the application further provides a use of the slip ring chamber with double carbon brush structure and cooling structure in a doubly-fed wind power generator.

[0043] The foregoing is considered only as a typical embodiment of the application, and one skilled in the art can understand or implement the application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the application.

[0044] It should be understood that the application is not limited to the above-described and described, and can be variously modified and changed without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A slip ring chamber having a dual carbon brush structure and a cooling structure, characterized in that, The device includes a slip ring chamber housing (8), and a double carbon brush structure (12) is provided inside the slip ring chamber housing (8). The double carbon brush structure (12) includes a mounting cylinder, and a number of excitation devices are provided on the mounting cylinder. Each set of excitation devices includes a conductive plate (4) arranged around the mounting cylinder, and slip rings (3) arranged on the left and right sides of the conductive plate (4). A number of carbon brushes (1) are provided on the upper half of the slip ring (3), and a number of conductive posts (2) are provided on the conductive plate (4). The conductive posts (2) penetrate the slip ring (3). A first cooling fan (13-1) and a second cooling fan (13-2) are symmetrically arranged diagonally above the outer shell (8) of the slip ring chamber. A dust collector (15) is arranged below the outer shell (8) of the slip ring chamber. The cooling air from the first cooling fan (13-1) and the second cooling fan (13-2) forms a symmetrical cooling air path. The cooling air path flows through the excitation assembly and then flows to the dust collector (15).

2. The slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 1, characterized in that, The slip ring chamber housing (8) is provided with a first air guide plate (21), a second air guide plate (22) and a third air guide plate (23). The first air guide plate (21) is located between the first air cooler (13-1) and the second air cooler (13-2). The second air guide plate (22) and the third air guide plate (23) are inclinedly arranged on both sides of the slip ring chamber housing (8).

3. A slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 1, characterized in that, One end of the dual carbon brush structure (12) is provided with an mounting plate (5), and the other end of the dual carbon brush structure (12) is provided with a support rod (7). The rear plate of the slip ring chamber shell (8) is connected to the mounting plate (5). The front end of the slip ring chamber shell (8) is provided with an inner partition plate (17). A fixing plate (9) is fixed on the inner partition plate (17). The fixing plate (9) is connected to the support rod (7).

4. A slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 1, characterized in that, An insulating separator (6) is provided on the mounting cylinder, and the insulating separator (6) is located on both sides of each group of excitation devices.

5. A slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 1, characterized in that, The longitudinal section of the slip ring chamber shell (8) is octagonal. The left and right sides of the slip ring chamber shell (8) are provided with a first cover plate (10-1) and a second cover plate (10-2). The upper side of the slip ring chamber shell (8) is provided with a third cover plate (11). The lower side of the slip ring chamber shell (8) is provided with a first inlet plate (14-1) and a second inlet plate (14-2). The first cover plate (10-1), the second cover plate (10-2) and the third cover plate (11) are all movably connected.

6. A slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 5, characterized in that, Waterproof connectors are provided on the first inlet plate (14-1) and the second inlet plate (14-2), and a cable interface (16) is provided on the slip ring (3). The cable connected to the cable interface (16) is led out through the waterproof connector (19).

7. A slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 5, characterized in that, The first inlet plate (14-1) and the second inlet plate (14-2) are both fixed to the outer shell (8) of the slip ring chamber by bolts.

8. A slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 1, characterized in that, A support column (18) is provided at one end of the slip ring chamber shell (8), and the slip ring chamber shell (8) is connected to the generator body through the support column (18).

9. A slip ring chamber with a dual carbon brush structure and a cooling structure according to claim 1, characterized in that, The first cooling fan (13-1) is fixed to the slip ring chamber shell (8) by bolts, the second cooling fan (13-2) is fixed to the slip ring chamber shell (8) by bolts, and the dust collector (15) is fixed to the slip ring chamber shell (8) by bolts; the first cooling fan (13-1), the second cooling fan (13-2) and the slip ring chamber shell (8) are all sealed by annular support frames, and the dust collector (15) and the slip ring chamber shell (8) are sealed by sealing strips.

10. The application of a slip ring chamber with a dual carbon brush structure and a cooling structure as described in any one of claims 1 to 9 in a doubly fed wind turbine.

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