High-power double-fed wind power slip ring chamber structure

Abstract

The utility model provides a high-power double-fed wind power slip ring chamber structure, which comprises a shell unit, two air inlets which are arranged on two sides of the upper end of the shell unit and are symmetrical to each other, a fan arranged on the air inlets, and an air outlet which is arranged at the lower end of the shell unit to form an internal air path, therefore, the maintenance convenience in the operation process of the motor is effectively improved through the structural arrangement which is simple and convenient to disassemble and observe, a heat dissipation wind path is further provided, the heat dissipation wind path has a good heat dissipation effect, and reliable operation of the motor is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation technology, and in particular relates to a high-power doubly-fed wind turbine slip ring chamber structure. Background Technology

[0002] With the rapid development of the wind power industry, the power of wind turbines is constantly increasing. As one of the main components of the motor, the slip ring plays a crucial role, and heat dissipation of the slip ring is of paramount importance. If the slip ring is damaged or fails, the generator will not be able to operate, increasing after-sales maintenance costs. Currently, the existing slip ring chamber structure is not effective in dissipating heat from high-power generator slip rings, is inconvenient to disassemble, and is heavy, increasing the difficulty of later maintenance.

[0003] Chinese invention patent CN107733174A, published on February 23, 2018, discloses a slip ring chamber structure for a doubly-fed wind turbine, comprising a slip ring chamber body, an insulating air guide plate 1, an insulating air guide plate 2, an insulating air guide plate 3, an insulating air guide plate 4, a volute protective cover with a dust discharge port at the bottom, and a centrifugal fan; an air inlet is opened on the side plate of the slip ring chamber body; the insulating air guide plate 1 is installed on the bottom plate of the slip ring chamber body to prevent airflow from passing directly through the bottom of the slip ring; the insulating air guide plate 2 is a circular plate with a through hole in its center, the outline of which is formed by connecting a small arc and a large arc, the radius of the small arc being... Ensure that the slip ring extends beyond the second insulating air guide plate, and that the arc length of the small arc covers all the carbon brushes. The second insulating air guide plate is installed between the connecting flange plate and the volute protective cover at one end of the slip ring chamber body. During installation, the small arc and the air inlet on the side plate of the slip ring chamber body are on the same side, and the arc length of the small arc covers all the carbon brushes to prevent airflow from directly entering the centrifugal fan. The third insulating air guide plate is installed on the side plate of the slip ring chamber body above the air inlet, and the fourth insulating air guide plate is installed on the top plate of the slip ring chamber body 1. The volute protective cover is fixed around the connecting flange plate at one end of the slip ring chamber body. The centrifugal fan is located inside the volute protective cover and fixed on the slip ring or the shaft.

[0004] The slip ring chamber structure of the doubly fed wind turbine in this Chinese invention patent has the following general usage and advantages: By setting up a multi-stage air guide plate structure to form an air guide path, most of the cooling air is guided to flow through the slip ring carbon brush, achieving the effect of low temperature rise in the slip ring chamber; a volute protective cover isolated from the main body of the slip ring chamber is used to collect carbon powder, avoiding secondary pollution to the surrounding parts of the slip ring chamber, achieving the purpose of cleaning and reducing the workload of maintenance personnel.

[0005] However, the slip ring chamber structure of the doubly fed wind turbine still has at least the following shortcomings in actual use, which are the technical problems that this utility model aims to solve: it cannot solve the problems of complex assembly and inconvenient subsequent maintenance, and although the fixed air path setting can improve the heat dissipation efficiency to a certain extent, it also has the problem of uneven internal heat dissipation caused by the single air path.

[0006] Therefore, in summary, it is necessary to develop a slip ring chamber structure that is easy to install and maintain and has good heat dissipation to solve this problem. Utility Model Content

[0007] This utility model provides a high-power doubly-fed wind turbine slip ring chamber structure, including a shell unit, two symmetrical air inlets located on both sides of the upper end of the shell unit, a fan located on the air inlets, and an air outlet located at the lower end of the shell unit to form an internal air passage. This utility model effectively improves the convenience of maintenance during motor operation through a simple, easy-to-disassemble and observe structural design, and further provides a heat dissipation air passage with good heat dissipation effect, ensuring reliable operation of the motor.

[0008] The technical solution adopted by this utility model to solve the above problems is: a high-power doubly fed wind turbine slip ring chamber structure, characterized in that it includes a shell unit, two air inlets arranged symmetrically on both sides of the upper end of the shell unit, a fan arranged on the air inlets, and an air outlet arranged at the lower end of the shell unit to form an internal air passage.

[0009] A further preferred technical solution is that the housing unit includes a main frame, an operating port disposed on the periphery of the main frame and communicating with the interior, a first cover plate disposed on the operating port, and a second cover plate disposed on the mounting port.

[0010] A further preferred technical solution is that the air inlet is set at an angle.

[0011] A further preferred technical solution is that the second cover plate is a fiberglass plate.

[0012] A further preferred technical solution is that the housing unit further includes a detachable component disposed on the main frame and used to connect the cover plate.

[0013] A further preferred technical solution is that the detachable component includes a first connecting hole disposed on the main frame, a second connecting hole disposed on the first cover plate, and a first bolt disposed on the second connecting hole and connected to the first connecting hole.

[0014] A further preferred technical solution is that: the main frame includes an upper frame and a lower frame, a plurality of first fixing holes are provided on the periphery of the upper frame, a plurality of second fixing holes are provided on the periphery of the lower frame, and second bolts are connected to the first fixing holes and the second fixing holes for fixing the relative positions of the upper frame and the lower frame.

[0015] A further preferred technical solution is that an air guide plate facing the slip ring is provided on the inner side of the air inlet.

[0016] The beneficial effects of this invention are at least as follows:

[0017] A slip ring chamber structure that is easy to assemble, disassemble, and observe is provided. When problems are observed in the internal structure such as the slip ring through the cover window, inspection and maintenance can be carried out conveniently and quickly. In addition, an air intake path is provided that guides air from the opposite sides to the center. After multiple exchanges and impacts on the inner wall, the airflow is discharged from the air outlet below, thus completing the heat dissipation of the slip ring. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 This is a front view of the present invention in its open state;

[0021] Figure 3 This is a partial schematic diagram of the present invention. Figure 1 ;

[0022] Figure 4 This is a rear view of the present invention;

[0023] Figure 5 This is a partial schematic diagram of the present invention. Figure 2 ;

[0024] Figure 6 This is a side view of the present invention.

[0025] The meanings of the various reference numerals in the figure are as follows:

[0026] 1. Housing unit; 2. Air inlet; 3. Fan; 4. Air outlet.

[0027] Main frame 11, operation port 12, installation port 13, first cover plate 14, second cover plate 15, detachable component 16, air guide plate 21;

[0028] Upper frame 111, lower frame 112, first fixing hole 113, second fixing hole 114, second bolt 115, first connecting hole 161, second connecting hole 162, first bolt 163. Detailed Implementation

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0030] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc., mentioned or possibly mentioned in this specification are defined relative to the structure shown in the accompanying drawings. The terms "inner" and "outer" refer to the direction toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0031] Example 1

[0032] As attached Figures 1-3 Appendix Figure 6 As shown, a high-power doubly fed wind turbine slip ring chamber structure includes a shell unit 1, two air inlets 2 symmetrically arranged on both sides of the upper end of the shell unit 1, a fan 3 arranged on the air inlets 2, and an air outlet 4 arranged at the lower end of the shell unit 1 to form an internal air passage.

[0033] In this embodiment, the general usage of this high-power doubly-fed wind turbine slip ring chamber structure is as follows:

[0034] The slip ring of a high-power doubly-fed wind turbine mainly consists of a conductive ring, brush holder, brush grip, carbon brush, constant pressure spring, and other components. The conductive ring is installed on the generator rotor, and the brush holder system is fixed in the slip ring chamber. The slip ring is usually made of metal and is installed at the rotation center of the equipment. It mainly consists of two parts: a rotating part called the "rotor" and a stationary part called the "stator". The above-mentioned slip ring structure is set in the main frame of the slip ring chamber described in this application. The housing unit 1 is used to accommodate and protect the slip ring and other key electrical components.

[0035] Slip rings and rotors, along with other electrical components, are fixedly installed inside the housing unit 1. Fan 3 is bolted to the upper end of the air inlet 2 and supplies air inwards. After passing through the electrical components, the air naturally flows downwards from the air outlet 4. Because fans 3 are symmetrically positioned on both sides of the upper end, but only have a single air outlet 4 at the center of the lower end, the two airflows generated by motor 3 collide and mix inside the housing unit 1, resulting in turbulence. In this turbulent state, the movement of fluid particles is highly irregular. This mixing effect makes the transfer of matter, energy, and heat in the fluid more rapid, resulting in more uniform internal heat dissipation. Furthermore, due to the diffusivity of turbulence, it accelerates heat transfer within the fluid, providing excellent heat dissipation and effectively cooling the components inside the housing unit 1.

[0036] As a preferred embodiment, the housing unit 1 includes a main frame 11, an operation port 12 disposed on the periphery of the main frame 11 and communicating with the interior, a mounting port 13 disposed on the front side of the main frame 11, a first cover plate 14 disposed on the operation port 12, and a second cover plate 15 disposed on the mounting port 13.

[0037] In this embodiment, to further reduce the difficulty of installation and subsequent maintenance, the housing unit 1 is configured as a detachable structure, including a main frame 11 connected to the outside. The main frame 11 has multiple operating ports 12 on its periphery to facilitate the replacement of internal components, and an installation port 13 on its front side for disassembling and assembling the slip ring structure. Both the operating ports 12 and the installation port 13 are covered by cover plates to achieve closure. Preferably, the main frame 11 is a polygonal column, which facilitates observation, disassembly and maintenance from multiple angles, avoiding the need to disassemble the entire device to replace the carbon brush.

[0038] As a preferred embodiment, the housing unit 1 further includes a detachable component 16 disposed on the main frame 11 and used to connect the first cover plate 14. The detachable component 16 includes a first connecting hole 161 disposed on the main frame 11, a second connecting hole 162 disposed on the first cover plate 14, and a first bolt 163 disposed on the second connecting hole 162 and connected to the first connecting hole 161.

[0039] In this embodiment, the detachable component 16 is used to connect the first cover plate 14 and the main frame 11, and can be configured in various forms, such as a latch connection, a hook-and-groove connection, a pin connection, etc. A bolt connection is preferred. Due to the diverse installation positions and application scenarios of the slip ring chamber, bolt connections can effectively ensure the stability of the connection, facilitate replacement and disassembly, and have low operating costs. Specifically, first connecting holes 161 at different positions are provided on the periphery of the main frame 11 near the mounting port 13. The first bolts 163 are used to connect and fix the components to the second connecting holes 162 at different positions on the first cover plate 14. The first connecting holes 161 are threaded holes.

[0040] As a preferred embodiment, the air inlet 2 is inclined, and an air guide plate 21 facing the slip ring is provided on the inner side of the air inlet 2.

[0041] In this embodiment, in order to further enhance the targeted heat dissipation of electrical components such as slip rings, the air inlet 2 is obliquely set on the main frame 11 and kept symmetrical. An air guide plate 21 is provided on the inner side of the air inlet, pointing towards the slip ring, guiding the airflow towards the center, thereby improving the heat dissipation efficiency of electrical components.

[0042] As a preferred embodiment, the first cover plate 14 is a fiberglass plate.

[0043] In this embodiment, the first cover plate 14 is made of fiberglass reinforced plastic (GFRP), which is a fiber-reinforced plastic formed by using glass fiber and its products (such as glass cloth, tape, felt, yarn, etc.) as reinforcing materials and synthetic resin as matrix material. It has good corrosion resistance and a relative density between 1.5 and 2.0, which is only 1 / 4 to 1 / 5 of that of carbon steel. Compared with steel plates, it has the advantages of being lightweight and thin. It is also an excellent insulating material, which effectively prevents the electrical components from affecting the outside world in case of accidents while reducing weight. It is preferably made of transparent fiberglass, so that operators can easily observe the internal operation through the installation port.

[0044] As a preferred embodiment, the main frame 11 is rotatably connected to the inner wall near the operation port 12, with a brush rod for cleaning the field of vision of the second cover plate 15.

[0045] In this embodiment, the brush rod includes a rod body rotatably connected to the inner wall of the main frame near the operating port and brush bristles set at the front end of the rod body. When the fan is started, the brush rod will rotate due to the impact of the airflow, thereby cleaning the floating dust on the inner side of the cover plate and avoiding the situation where carbon powder adheres to the cover plate, which would restrict the field of vision and make it difficult to observe.

[0046] Compared with the prior art, the technical solution described in this application has the following advantages: it has a slip ring chamber structure that is easier to observe, install and maintain, is suitable for a variety of application scenarios, reduces the frequency and difficulty of assembly and maintenance, and has a good heat dissipation effect.

[0047] Example 2

[0048] As attached Figures 4-5 As shown, this embodiment is based on embodiment one, and the main frame is set as a structure with adjustable height.

[0049] The main frame 11 includes an upper frame 111 and a lower frame 112, a plurality of first fixing holes 113 are provided on the periphery of the upper frame 111, a plurality of second fixing holes 114 are provided on the periphery of the lower frame 112, and second bolts 115 are connected to the first fixing holes 113 and the second fixing holes 114 to fix the relative positions of the upper frame 111 and the lower frame 112.

[0050] In this embodiment, the main frame 11 is divided into an upper frame 111 and a lower frame 112, which are attached to each other by sidewalls. Since the second bolt 115 is connected to different first fixing holes 113 and second fixing holes 114, the overall height of the main frame can be adjusted according to the actual situation. The change in height not only adjusts the indoor space, but also adjusts the distance from the air vent to the electrical components, thus having diverse application scenarios.

[0051] Compared with the prior art, the technical solution described in this application has the advantage of further expanding the scope of application and being applicable to more scenarios.

[0052] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings. However, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this utility model. These are non-inventive modifications and are protected by patent law as long as they fall within the scope of the claims of this utility model.

Claims

1. A high-power doubly-fed wind turbine slip ring chamber structure, characterized in that, It includes a housing unit (1), two air inlets (2) symmetrically arranged on both sides of the upper end of the housing unit (1), a fan (3) arranged on the air inlets (2), and an air outlet (4) arranged at the lower end of the housing unit (1) to form an internal air passage.

2. The high-power doubly-fed wind turbine slip ring chamber structure according to claim 1, characterized in that, The housing unit (1) includes a main frame (11), an operation port (12) disposed on the periphery of the main frame (11) and communicating with the interior, an installation port (13) disposed on the front side of the main frame (11), a first cover plate (14) disposed on the operation port (12), and a second cover plate (15) disposed on the installation port (13).

3. The high-power doubly-fed wind turbine slip ring chamber structure according to claim 1, characterized in that, The air inlet (2) is set at an angle.

4. The high-power doubly-fed wind turbine slip ring chamber structure according to claim 2, characterized in that, The second cover plate (15) is a fiberglass plate.

5. A high-power doubly-fed wind turbine slip ring chamber structure according to claim 2, characterized in that, The housing unit (1) further includes a detachable component (16) disposed on the main frame (11) and used to connect the first cover plate (14).

6. A high-power doubly-fed wind turbine slip ring chamber structure according to claim 5, characterized in that, The detachable component (16) includes a first connecting hole (161) on the main frame (11), a second connecting hole (162) on the first cover plate (14), and a first bolt (163) on the second connecting hole (162) and connected to the first connecting hole (161).

7. A high-power doubly-fed wind turbine slip ring chamber structure according to claim 2, characterized in that, The main frame (11) includes an upper frame (111) and a lower frame (112), with a plurality of first fixing holes (113) provided on the periphery of the upper frame (111) and a plurality of second fixing holes (114) provided on the periphery of the lower frame (112), and second bolts (115) connected to the first fixing holes (113) and the second fixing holes (114) for fixing the relative positions of the upper frame (111) and the lower frame (112).

8. A high-power doubly-fed wind turbine slip ring chamber structure according to claim 3, characterized in that, The air inlet (2) is provided with an air guide plate (21) facing the slip ring.

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