Yaw slip ring assembly structure for small wind turbine generator

Abstract

The utility model discloses a yaw slip ring assembly structure for a small wind turbine generator, which comprises a main frame and a sliding yaw system, and the main frame is connected with a tower of the wind turbine generator through the sliding yaw system; the sliding yaw system comprises a yaw communication slip ring, a yaw power supply slip ring, a yaw bracket, a slip ring mounting base, a slip ring mounting bracket, a yaw sliding bearing and a yaw main shaft; the yaw support is supported on the yaw main shaft through a yaw sliding bearing, and the main machine frame is rotationally connected with the yaw main shaft through the yaw support. The yaw communication slip ring is installed above the yaw power supply slip ring, the yaw power supply slip ring penetrates into the slip ring installation support and is connected with the yaw support through the slip ring installation base, the yaw power supply slip ring comprises herringbone electric brushes and a base body, and the multiple herringbone electric brushes are installed on the two sides of the base body respectively and matched with the base body. The installation problem of the yaw slip ring of the small direct drive unit is solved, and the structure is simple and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of yaw slip ring assembly of small wind turbine generator sets, in particular to a yaw slip ring assembly structure for small wind turbine generator sets. Background Art

[0002] In existing technology, small wind turbines under 100kW utilize two single-row tapered bearings arranged back-to-back for their main shaft bearings. These bearings are mounted in a split-type bearing housing within the wheel hub and connected to the frame via the stator main shaft. Suitable wind turbines feature a small direct-drive transmission system, where the generator rotor is directly connected to the wheel hub and the stator is mounted on the stator main shaft. These turbines typically utilize a downwind passive yaw design and a sliding yaw system. Yaw slip rings are used for power and communication between the main engine and the yaw system.

[0003] Medium and large wind turbines generally use active yaw systems, which can use yaw twist cables instead of yaw slip rings. However, the yaw slip rings of conventional small wind turbines use a carbon brush slip ring design, which has a short maintenance cycle and a large workload. Therefore, the assembly of yaw slip rings for small wind turbines requires customized design. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies in the prior art and provide a yaw slip ring assembly structure for a small wind turbine set, which realizes the installation support and installation adjustment of the brushes, and at the same time matches and installs the yaw communication slip ring, thereby solving the yaw slip ring installation problem of the small direct-drive set, and has a simple and reliable structure.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the present invention is as follows: a yaw slip ring assembly structure for a small wind turbine generator, comprising a generator rotor, a wheel hub, a generator stator, a stator main shaft, a bearing, a bearing seat, a main frame and a sliding yaw system, wherein the generator rotor is connected to the wheel hub, the generator stator is mounted on the stator main shaft, two of the bearings are respectively mounted in the wheel hub through bearing seats and connected to the main frame through the stator main shaft, and the main frame is connected to the tower of the wind turbine generator through the sliding yaw system; the sliding yaw system includes a yaw communication slip ring, a yaw power supply slip ring, a yaw The main frame comprises a yaw bracket, a slip ring mounting base, a slip ring mounting bracket, a yaw sliding bearing and a yaw main shaft; the yaw main shaft is connected to the tower, the yaw bracket is supported on the yaw main shaft through the yaw sliding bearing, and the main frame is rotatably connected to the yaw main shaft through the yaw bracket; the yaw communication slip ring is installed above the yaw power supply slip ring, the yaw power supply slip ring penetrates into the slip ring mounting bracket and is connected to the yaw bracket through the slip ring mounting base, wherein the yaw power supply slip ring includes a herringbone brush and a base, and a plurality of the herringbone brushes are respectively installed on both sides of the base and form a match with the base.

[0006] Furthermore, the yaw power supply slip ring includes a brush mounting block and a brush support shaft; a brush mounting block is provided at the top and bottom of the herringbone brush on each side, and mounting holes for the brush support shaft to pass through are opened on the brush mounting block and the herringbone brush. The brush support shaft passes through the mounting holes of the brush mounting block and the herringbone brush, so that a connection is formed between the brush support shaft, the brush mounting block and the herringbone brush. At the same time, the brush mounting block located at the top of the herringbone brush is connected to the slip ring mounting bracket, and the brush mounting block located at the bottom of the herringbone brush is connected to the slip ring mounting base.

[0007] Furthermore, the yaw power supply slip ring includes an insulating sleeve, and the insulating sleeve is arranged on the outside of the brush support shaft.

[0008] Furthermore, the yaw power supply slip ring includes a power supply slip ring base and a power supply slip ring outlet terminal; the power supply slip ring base is connected to the yaw main shaft, and the base is installed on the power supply slip ring base; the power supply slip ring outlet terminal is installed on the top of the base.

[0009] Furthermore, the yaw communication slip ring includes a communication slip ring adapter, a communication slip ring body, a junction box bracket and a communication slip ring bracket; one end of the communication slip ring body is fixedly connected to the base through the communication slip ring adapter, and the other end of the communication slip ring body is fixed to the slip ring mounting bracket through the communication slip ring bracket, and is connected to the junction box bracket.

[0010] Furthermore, a through hole is formed on the communication slip ring adapter, a cable is connected to the power supply slip ring outlet terminal, and a free end of the cable passes through the through hole and then into the center hole of the yaw main shaft.

[0011] Furthermore, the herringbone brush is a copper alloy brush.

[0012] Furthermore, the herringbone brush is provided with a connection terminal.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] 1. The utility model adopts a herringbone design of copper alloy brushes, which can maintain good contact during forward and reverse rotation conversion, has a long service life and shortens the maintenance cycle;

[0015] 2. The yaw power supply slip ring of this utility model adopts an open design, which is convenient for maintenance and replacement of brushes;

[0016] 3. The yaw communication slip ring of the utility model adopts a universal industrial communication slip ring, which is independently installed on the upper part of the yaw power supply slip ring, so that the power supply and communication do not interfere with each other, thereby enhancing the reliability of the small wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Schematic diagram of the main structure of a direct-drive small wind turbine.

[0018] Figure 2 It is a structural diagram of the present utility model.

[0019] Figure 3 It is a structural sectional view of the utility model.

[0020] Figure 4 This is a schematic diagram of the three-dimensional assembly of the sliding yaw system.

[0021] Figure 5 This is a structural cross-sectional view of the sliding yaw system. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] See also Figures 1 to 5 The figure shows a yaw slip ring assembly structure for a small wind turbine provided by this embodiment, including a generator rotor, a hub, a generator stator, a stator main shaft, bearings, a bearing seat, a main frame a, and a sliding yaw system d. The hub and the generator housing of the direct-drive small wind turbine are integrated, a downwind passive yaw design is adopted, and a pitch drive device b is optionally provided. The internal structure of the wind turbine hub and the generator c is as follows: the generator rotor is connected to the hub, the generator stator is mounted on the stator main shaft, and the bearings are angular contact ball bearings. Two bearings are respectively mounted in the hub through bearing seats and connected to the main frame a through the stator main shaft. The main frame a is connected to the tower of the wind turbine via the sliding yaw system d.

[0024] The sliding yaw system d includes a yaw communication slip ring 1, a yaw power supply slip ring 2, a yaw bracket 3, a slip ring mounting base 4, a slip ring mounting bracket 5, a yaw sliding bearing 6 and a yaw main shaft 7; the yaw main shaft 7 is connected to the tower through bolts, the yaw bracket 3 is supported on the yaw main shaft 7 through the yaw sliding bearing 6, the main frame a is rotatably connected to the yaw main shaft 7 through the yaw bracket 3, and the main frame a rotates around the yaw main shaft 7 to realize the yaw movement of the unit.

[0025] The yaw communication slip ring 1 is installed above the yaw power supply slip ring 2. The yaw communication slip ring 1 includes a communication slip ring adapter 101, a communication slip ring body 102, a junction box bracket 103 and a communication slip ring bracket 104. A through hole is opened on the communication slip ring adapter 101. One end of the communication slip ring body 102 is fixedly connected to the base 202 of the yaw power supply slip ring 2 through the communication slip ring adapter 101. The other end of the communication slip ring body 102 is fixed to the slip ring mounting bracket 5 through the communication slip ring bracket 104, and is connected to the junction box bracket 103 for installing the electrical junction box of the wind turbine.

[0026] The yaw power supply slip ring 2 is inserted into the slip ring mounting bracket 5 and is connected to the yaw bracket 3 through the slip ring mounting base 4, which supports the rotating part of the yaw power supply slip ring 2; the yaw power supply slip ring 2 includes a herringbone brush 201, a base 202, a brush mounting block 203, a brush support shaft 204, an insulating sleeve (not shown in the figure), a power supply slip ring base 206 and a power supply slip ring outlet terminal 207; the herringbone brush 201 is a copper alloy brush, and a plurality of herringbone brushes 201 are respectively mounted on both sides of the base 202 and form a match with the base 202; a brush mounting block 203 is provided on the top and bottom of the herringbone brush 201 on each side; a mounting hole for the brush support shaft 204 to pass through is opened on the brush mounting block 203 and the herringbone brush 201, and the brush support shaft 204 passes through the brush. The brush mounting block 203 and the mounting holes of the herringbone brush 201 connect the brush mounting block 203 and multiple herringbone brushes 201 in series, so that a connection is formed between the brush support shaft 204, the brush mounting block 203 and the herringbone brush 201; the insulating tube sleeve is arranged on the outside of the brush support shaft 204 to prevent current from being transmitted to the slip ring mounting bracket 5; at the same time, the brush mounting block 203 located at the top of the herringbone brush 201 is connected to the slip ring mounting bracket 5, and the brush mounting block 203 located at the bottom of the herringbone brush 201 is connected to the slip ring mounting base 4; the power supply slip ring base 206 is connected to the yaw main shaft 7, and the base 202 is installed on the power supply slip ring base 206 to support the fixed part of the yaw power supply slip ring 2; the herringbone brush 201 is provided with a wiring terminal, which is connected to the power supply slip ring incoming line. The power supply slip ring outlet terminal 207 is installed on the top of the base 202 . The power supply slip ring outlet terminal 207 is connected to a cable. The free end of the cable passes through the through hole of the communication slip ring adapter 101 and then passes through the center hole of the yaw main shaft 7 .

[0027] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any changes made based on the shape and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A yaw slip ring assembly structure for a small wind turbine generator, comprising a generator rotor, a wheel hub, a generator stator, a stator main shaft, bearings, a bearing seat, a main frame, and a sliding yaw system. The generator rotor is connected to the wheel hub, the generator stator is mounted on the stator main shaft, two bearings are mounted in the wheel hub via bearing seats, and are connected to the main frame via the stator main shaft. The main frame is connected to the tower of the wind turbine generator via the sliding yaw system, characterized in that: The sliding yaw system comprises a yaw communication slip ring (1), a yaw power supply slip ring (2), a yaw bracket (3), a slip ring mounting base (4), a slip ring mounting bracket (5), a yaw sliding bearing (6) and a yaw main shaft (7); the yaw main shaft (7) is connected to a tower, the yaw bracket (3) is supported on the yaw main shaft (7) through the yaw sliding bearing (6), and the main frame is rotatably connected to the yaw main shaft (7) through the yaw bracket (3); the yaw communication slip ring (1) is mounted above the yaw power supply slip ring (2), the yaw power supply slip ring (2) penetrates into the slip ring mounting bracket (5) and is connected to the yaw bracket (3) through the slip ring mounting base (4), wherein the yaw power supply slip ring (2) comprises a herringbone-shaped brush (201) and a base (202), and a plurality of the herringbone-shaped brushes (201) are respectively mounted on both sides of the base (202) and form a match with the base (202).

2. The yaw slip ring assembly structure for a small wind turbine according to claim 1, characterized in that: The yaw power supply slip ring (2) comprises a brush mounting block (203) and a brush support shaft (204); the top and bottom of the herringbone brush (201) on each side are both provided with a brush mounting block (203); the brush mounting block (203) and the herringbone brush (201) are both provided with mounting holes for the brush support shaft (204) to pass through; the brush support shaft (204) passes through the mounting holes of the brush mounting block (203) and the herringbone brush (201), so that a connection is formed between the brush support shaft (204), the brush mounting block (203) and the herringbone brush (201); at the same time, the brush mounting block (203) located at the top of the herringbone brush (201) is connected to the slip ring mounting bracket (5), and the brush mounting block (203) located at the bottom of the herringbone brush (201) is connected to the slip ring mounting base (4).

3. The yaw slip ring assembly structure for a small wind turbine according to claim 2, characterized in that: The yaw power supply slip ring (2) comprises an insulating sleeve, and the insulating sleeve is sleeved on the outside of the brush support shaft (204).

4. The yaw slip ring assembly structure for a small wind turbine according to claim 1, characterized in that: The yaw power supply slip ring (2) comprises a power supply slip ring base (206) and a power supply slip ring outlet terminal (207); the power supply slip ring base (206) is connected to the yaw main shaft (7), and the base (202) is mounted on the power supply slip ring base (206); and the power supply slip ring outlet terminal (207) is mounted on the top of the base (202).

5. The yaw slip ring assembly structure for a small wind turbine according to claim 4, characterized in that: The yaw communication slip ring (1) comprises a communication slip ring adapter (101), a communication slip ring body (102), a junction box bracket (103) and a communication slip ring bracket (104); one end of the communication slip ring body (102) is fixedly connected to a base (202) via the communication slip ring adapter (101), and the other end of the communication slip ring body (102) is fixed to a slip ring mounting bracket (5) via the communication slip ring bracket (104) and is connected to the junction box bracket (103).

6. The yaw slip ring assembly structure for a small wind turbine according to claim 5, characterized in that: A through hole is formed on the communication slip ring adapter (101), a cable is connected to the power supply slip ring outlet terminal (207), and a free end of the cable passes through the through hole and then into the center hole of the yaw main shaft (7).

7. The yaw slip ring assembly structure for a small wind turbine according to claim 1, characterized in that: The herringbone-shaped brush (201) is a copper alloy brush.

8. The yaw slip ring assembly structure for a small wind turbine according to claim 1, characterized in that: The herringbone-shaped brush (201) is provided with a connection terminal.

Images