Floating type offshore wind power device

Abstract

The invention discloses a floating type offshore wind power device, and relates to the technical field of offshore wind power, the floating type offshore wind power device comprises a main shaft and a mounting shell for supporting the main shaft, and the mounting shell is internally provided with a front guide ring, a rear guide ring, a rear guide ring and a plurality of buffer chambers, a plurality of connecting cavities distributed in an array mode are formed in the rear guide ring; the ventilation cavity is located between the front guide ring and the rear guide ring, exhaust holes are formed in the ventilation cavity, and air in a rear cabin is buffered by the rear guide ring, collides with air penetrating through the front guide ring and is exhausted through the exhaust holes. The rear guide ring guides air in the cabin to flow outwards and cools the spindle, the sea wind makes contact with the air flowing out of the cabin in the ventilation cavity, the air pressure in the ventilation cavity is increased in the continuous input and intersection process of the two air flows, the two air flows are exhausted through the exhaust passage, and the situation that the sea wind moves towards the interior of the cabin and corrodes equipment in the cabin is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and in particular to a floating offshore wind power device. Background Art

[0002] As is known to all, offshore wind power is generally divided into two categories: fixed and floating. Offshore wind power devices are generally composed of a supporting structure, a wind turbine and a transmission system. The wind turbine includes a nacelle installed on the top of the tower, the internal power generation components of the nacelle and the blades of the main shaft extending to the outside of the nacelle. The sea breeze drives the blades and the main shaft to rotate, driving the gearbox and generator components inside the nacelle to work.

[0003] For example, the invention patent with application publication number CN113266527B and application publication date October 11, 2022, and named "Floating Offshore Wind Power", includes a wind turbine unit, a tower, a support structure and a mooring structure; the wind turbine unit is connected to the top of the support structure through the tower, and the mooring structure is connected to the bottom of the support structure; the support structure is a cubic frame structure, and one of the sides of the support structure is open, and the opening is set at the downwind position; the other three sides of the support structure are correspondingly provided with breeding cavities. The floating offshore wind power provided by the present invention utilizes a support structure to support the wind turbine unit and the mooring structure to float on the sea surface, and cooperates with the setting of the opening on the support structure. At the same time, the breeding cavity in the support structure can also be used for offshore breeding, thereby increasing the functional diversification of offshore wind power construction, and improving the support stability, which is more convenient for later maintenance.

[0004] The shortcomings of the existing technology are that when the offshore wind turbine is generating electricity, the wind drives the fan blades to rotate, which can guide most of the airflow to move, but the airflow facing the main shaft of the fan blade lacks a guiding device. When the airflow moves rapidly, a positive pressure area will be formed in front of the blade connection, and a negative pressure area will be formed behind the blade connection, causing the humid sea breeze to move toward the direction close to the main shaft. Moreover, the seal of the traditional main shaft will wear and develop gaps after long-term use. The sea breeze can then easily enter the cabin through the gap between the main shaft and the mounting seat. The moisture and salt in the airflow can easily corrode the equipment inside the cabin. Summary of the Invention

[0005] The object of the present invention is to provide a floating offshore wind power device to solve the above-mentioned deficiencies in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a floating offshore wind turbine, comprising a main shaft and a mounting shell supporting the main shaft, wherein the mounting shell is provided with:

[0007] A front guide ring, inside of which a plurality of buffer chambers distributed in an array are provided;

[0008] A rear guide ring, inside of which a plurality of connecting cavities distributed in an array are provided;

[0009] The ventilation cavity is located between the front guide ring and the rear guide ring and is provided with an exhaust hole. The air in the rear cabin is buffered by the rear guide ring and collides with the air passing through the front guide ring and is discharged through the exhaust hole.

[0010] As a further description of the above technical solution: a slope is provided on the main shaft, the front guide ring is fitted on the main shaft slope and the buffer chambers are distributed in an array along the inclination direction of the slope.

[0011] As a further description of the above technical solution: an inclined wind guide slope is provided on the side wall of the installation shell close to the slope, and the exhaust hole is located behind the wind guide slope.

[0012] As a further description of the above technical solution: an air guide port for the sea breeze to move in the opposite direction is provided between two adjacent buffer chambers.

[0013] As a further description of the above technical solution: a rotating ring that rotates synchronously with the main shaft is provided in the middle of the ventilation chamber, and the rotating ring rotates to move the rear air to the front.

[0014] As a further description of the above technical solution: the rotating ring includes a plurality of inclined plates which are press-fitted and fitted onto the main shaft one by one, and a connecting block which is fixedly mounted on the inclined plates and engaged with the mounting shell.

[0015] As a further description of the above technical solution: a groove and an elastic part for closing the groove are provided on the side wall of the inclined plate.

[0016] As a further description of the above technical solution: the inclined plate is internally slidably provided with a movable block for pushing the elastic part to move.

[0017] As a further description of the above technical solution: a connecting strip is slidably provided on the side wall of the inclined plate opposite to the elastic portion, and a plurality of protrusions are provided on the connecting strip.

[0018] As a further description of the above technical solution: the interior of the mounting shell is provided with oil chambers located on both sides of the rear guide ring, and the interior of the oil chamber is provided with a spacer ring with an arc-shaped cross section.

[0019] In the above technical solution, the present invention provides a floating offshore wind turbine with the following beneficial effects: when the wind turbine is working, the blades rotate under the push of the sea breeze, and a negative pressure area is formed behind the blade connection, and part of the sea breeze is sent to a position close to the main shaft. The sea breeze moves from the gap between the main shaft and the mounting shell to the inside of the nacelle (in the form of a vacuum). Figure 5The airflow moving from left to right is inward movement, and the airflow moving from right to left is outward movement). When the sea breeze passes through the front guide ring, it will be diverted by the buffer chamber on the front guide ring, which will reduce the speed of the sea breeze and reduce its penetration. Part of the sea breeze moves from the gap between the front guide ring and the main shaft to the ventilation cavity. Moreover, under the continuous input of the sea breeze, the air pressure inside the buffer chamber gradually increases, further hindering the input of the rear sea breeze. The internal air pressure of the cabin gradually increases under the continuous operation of the air extraction pump. Part of the air enters the connecting cavity of the rear guide ring through the air inlet duct. The air gradually fills the connecting cavity and gradually moves to the adjacent connecting cavity through the gap between the rear guide ring and the main shaft, and then moves to the ventilation cavity through the air guide duct, colliding with the sea breeze in front. The continuous input and intersection of the two airflows cause the air pressure inside the ventilation cavity to increase and be discharged through the exhaust duct, preventing the sea breeze from moving into the cabin and corroding the internal equipment of the cabin. The air inside the cabin will contact the main shaft during the outward flow and take away the heat generated by the main shaft, thereby improving the heat dissipation efficiency of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of the installation housing provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a movable ring provided in an embodiment of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 A schematic structural diagram of a front guide ring provided in an embodiment of the present invention;

[0026] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0027] Figure 7 for Figure 5 Enlarged view of point C in the middle;

[0028] Figure 8 A schematic diagram of the structure of the oil channel provided in an embodiment of the present invention;

[0029] Figure 9 A schematic structural diagram of an inclined plate provided in an embodiment of the present invention;

[0030] Figure 10 A schematic diagram of the internal structure of the inclined plate provided in an embodiment of the present invention;

[0031] Figure 11 A schematic diagram of the structure of an activity bar provided by an embodiment of the present invention;

[0032] Figure 12 A schematic diagram of the internal structure of a spacer ring provided in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Mounting shell; 11. Wind guide slope; 12. Partition; 13. Air inlet; 14. Exhaust duct; 15. Air guide duct; 16. Oil chamber; 17. Ventilation chamber; 18. Oil channel; 21. Front guide ring; 211. Buffer chamber; 212. Air guide port; 22. Rear guide ring; 221. Connecting chamber; 222. Connecting hole; 23. Rotating ring; 231. Connecting block; 232. Inclined plate; 233. Elastic part; 234. Movable block; 235. Movable strip; 236. Protrusion; 24. Spacer ring; 241. Connecting piece; 3. Main shaft. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1-12 The embodiment of the present invention provides a technical solution: a floating offshore wind power device, comprising a main shaft 3 and a mounting shell 1 supporting the main shaft 3, wherein the mounting shell 1 is provided with:

[0037] The front guide ring 21 has a plurality of buffer chambers 211 arranged in an array;

[0038] The rear guide ring 22 has a plurality of connecting cavities 221 arranged in an array;

[0039] The ventilation cavity 17 is located between the front guide ring 21 and the rear guide ring 22 and is provided with an exhaust hole. The air in the rear cabin is buffered by the rear guide ring 22 and collides with the air passing through the front guide ring 21 and is discharged through the exhaust hole. The mounting shell 1 is provided with an air inlet duct 13 connecting the interior of the cabin and the connecting cavity 221 of the rear guide ring 22 closest to the interior of the cabin. An air guide duct 15 is provided between the connecting cavity 221 of the rear guide ring 22 farthest from the interior of the cabin and the ventilation cavity 17.

[0040] Specifically, a partition 12 is provided at the rear of the mounting shell 1 to separate the inside and outside of the cabin. An air inlet and an air pump are provided at the rear of the cabin of the wind turbine. A filtering device is provided inside the air inlet. The air pump draws outside air from the air inlet into the cabin. The filtering device in the air inlet filters the rear air into dry air without salt. The cold air enters the cabin to cool the equipment inside the cabin. A plurality of connecting holes 222 inclined toward the main shaft 3 are provided on the side walls of the two adjacent connecting cavities 221 of the rear guide ring 22.

[0041] Furthermore, when the wind turbine is working, the blades rotate under the push of the sea breeze, and a negative pressure area is formed behind the blade connection, and part of the sea breeze is sent to the position close to the main shaft 3. The sea breeze moves from the gap between the main shaft 3 and the mounting shell 1 to the inside of the nacelle (with Figure 5 As a result, the airflow moving from left to right is inward movement, and the airflow moving from right to left is outward movement). When the sea breeze passes through the front guide ring 21, it will be diverted by the buffer chamber 211 on the front guide ring 21, which reduces the speed of the sea breeze and reduces its penetration. Part of the sea breeze moves from the gap between the front guide ring 21 and the main shaft 3 to the ventilation chamber 17. Moreover, under the continuous input of the sea breeze, the air pressure inside the buffer chamber 211 gradually increases, further hindering the input of the rear sea breeze. The internal air pressure of the cabin gradually increases under the continuous operation of the air extraction pump, and part of the air enters the connecting chamber 221 of the rear guide ring 22 from the air inlet 13. The air gradually fills the connecting chamber 221 and gradually passes through the gap between the rear guide ring 22 and the main shaft 3. The gap moves to the adjacent connecting cavity 221, and then moves to the ventilation cavity 17 through the air guide duct 15, colliding with the sea breeze in front. The two air flows cause the internal air pressure of the ventilation cavity 17 to increase during the continuous input and intersection, and are discharged through the exhaust duct 14, preventing the sea breeze from moving into the cabin and corroding the internal equipment of the cabin. The air inside the cabin will contact the main shaft 3 during the outward flow, and take away the heat generated by the operation of the main shaft 3, thereby improving the heat dissipation efficiency of the main shaft 3. Moreover, the downwardly inclined connecting holes 222 on the side walls of the two adjacent connecting cavities 221 can guide the air in the rear connecting cavity 221 to the main shaft 3, thereby improving the contact efficiency between the air and the main shaft 3, and further improving the heat exchange speed.

[0042] In another embodiment provided by the present invention, a slope is provided on the main shaft 3, the front guide ring 21 is attached to the slope of the main shaft 3 and the buffer chambers 211 are distributed in an array along the inclination direction of the slope, and an air guide port 212 for the reverse movement of the sea breeze is provided between two adjacent buffer chambers 211.

[0043] Specifically, a one-way valve (with Figure 6 The one-way valve allows airflow to move from right to left).

[0044] Furthermore, the slope on the main shaft 3 is engaged with the mounting frame, which can cooperate to lock the main shaft 3 and prevent the main shaft 3 from moving axially toward the outside of the cabin, and the multiple buffer chambers 211 inside the front guide ring 21 are arranged in an array along the inclination direction of the slope of the main shaft 3. The angle between the side wall of the buffer chamber 211 and the main shaft 3 is an obtuse angle, which can allow the sea breeze to be diverted when flowing through the buffer chamber 211. The sea breeze easily moves along the side wall of the buffer chamber 211 in the direction away from the main shaft 3, reducing the amount of sea breeze while increasing the air pressure inside the buffer chamber 211, thereby hindering the subsequent input of sea breeze, and the gas in the rear buffer chamber 211 can flow to the front buffer chamber 211 through the one-way valve, further increasing the air pressure inside the front buffer chamber 211, so that the air pressure inside the front buffer chamber 211 is further increased and hindering the input of sea breeze.

[0045] In another embodiment provided by the present invention, an inclined air guide slope 11 is provided on a side wall of the installation housing 1 close to the slope, and the exhaust hole is located behind the air guide slope 11 .

[0046] Specifically, the wind guide slope 11 cooperates with the slope on the main shaft 3 to guide the sea breeze to flow through, avoid the sea breeze from accumulating at the connection between the main shaft 3 and the mounting shell 1, reduce the amount of sea breeze input, and the sea breeze will be guided to move away from the mounting shell 1 when flowing through the wind guide slope 11, so that the air pressure near the mounting shell 1 behind the wind guide slope 11 is reduced, and then the gas inside the ventilation cavity 17 is sucked away through the exhaust hole, thereby accelerating the discharge of gas.

[0047] In another embodiment provided by the present invention, a rotating ring 23 that rotates synchronously with the main shaft 3 is provided in the middle of the ventilation chamber 17. The rotating ring 23 rotates to move the rear air to the front.

[0048] Specifically, the exhaust passage 14 is located on the front half of the ventilation chamber 17 .

[0049] Furthermore, when the wind turbine is working, the main shaft 3 rotates with the rotating ring 23, and the rotating ring 23 pushes the air at the rear to move forward, and the air in the rear half of the ventilation chamber 17 moves to the front half of the ventilation chamber 17, so that the air pressure in the front half of the ventilation chamber 17 increases, so that this part of the air is accelerated to be discharged from the exhaust duct 14.

[0050] In another embodiment provided by the present invention, the rotating ring 23 includes a plurality of inclined plates 232 that are crimped and attached to the main shaft 3 one by one, and a connecting block 231 fixedly mounted on the inclined plate 232 and engaged with the mounting shell 1. A groove and an elastic portion 233 for closing the groove are provided on the side wall of the inclined plate 232.

[0051] Specifically, multiple connecting blocks 231 are spliced ​​together to form a ring shape, and a bearing for supporting the connecting block 231 is provided on the mounting shell 1. Multiple inclined plates 232 on the connecting block 231 are fitted and pressed one by one to form a ring shape, and there is only a groove on the side wall of the inclined plate 232 between two adjacent inclined plates 232 for air to move on both sides of the movable ring.

[0052] Furthermore, when the wind turbine is working, the blades drive the main shaft 3 to rotate, and the inclined plate 232 rotates synchronously with the main shaft 3. The elastic part 233 is retracted inside the inclined plate 232, and the side ridges of the inclined plate 232 push the rear air into the groove thereon, so that the air behind the movable ring moves toward the front of the movable ring, accelerating the movement of the rear air, improving the heat dissipation efficiency of the main shaft 3 while accelerating the air, and can better block the sea breeze in front, and even collide with the angle between the front side wall of the ventilation cavity 17 and the main shaft 3, and continue to move forward from the gap to block the sea breeze from moving backward; when the sea breeze is too strong, the wind turbine stops working, and the impeller is locked, the elastic part 233 seals the groove on the inclined plate 232, and multiple inclined plates 232 cooperate to separate the front and rear sides of the ventilation cavity 17, blocking airflow exchange and preventing sea breeze from invading the cabin. At the same time, the sea breeze entering the main shaft 3 and the front guide ring 21 will still enter the front of the ventilation cavity 17 and be sucked away from the exhaust port by the high-speed sea breeze guided by the wind guide slope 11.

[0053] Furthermore, in the above embodiment, the rear side is the side close to the cabin, and the front side is the side away from the cabin.

[0054] In another embodiment provided by the present invention, a movable block 234 is slidably provided inside the inclined plate 232 for pushing the elastic portion 233 to move, and a connecting strip is slidably provided on the side wall of the inclined plate 232 opposite to the elastic portion 233, and a plurality of protrusions 236 are provided on the connecting strip.

[0055] Specifically, the bottom of the inclined plate 232 is a strong magnet, the movable block 234 is magnetically matched with the bottom of the inclined plate 232, the bottom of the movable plate is provided with a slope, and the protrusion 236 is specifically a semi-cylindrical shape that fits with the groove on the inclined plate 232.

[0056] Further, when the wind power device is working, the blade drives the main shaft 3 to rotate, the inclined plate 232 is attracted to the main shaft 3 and rotates synchronously with the main shaft 3 under the action of the strong magnet at the bottom of the inclined plate 232, the movable block 234 in the inclined plate 232 moves away from the main shaft 3 under the action of centrifugal force, the elastic part 233 on the inclined plate 232 is concave under the action of the elasticity of the elastic part 233, forming a channel on the inclined plate 232, the inclined plate 232 pushes the rear air to flow forward, accelerating the heat dissipation of the main shaft 3 and blocking the sea wind from continuing to invade the cabin; when the wind speed of the sea wind is too fast and the wind power device stops rotating, the movable block 234 moves towards the main shaft 3 under the action of the strong magnet, the slope at the bottom of the movable block 234 pushes the movable strip 235 of the elastic part 233, the elastic part 233 seals the groove on the inclined plate 232, the movable strip 235 pushes the protruding block 236 into the elastic part 233 on the adjacent inclined plate 232, and cooperates with the elastic part 233 to seal the groove on the adjacent inclined plate 232, so that the air exchange is blocked and the sea wind is prevented from invading the cabin.

[0057] In still another embodiment of the present application, the inside of the mounting shell 1 is provided with oil chambers 16 on both sides of the rear guide ring 22, and the inside of the oil chamber 16 is provided with a partition ring 24 with an arc-shaped cross section.

[0058] Specifically, the inside of the mounting shell 1 is provided with an oil channel 18 for lubricating oil to flow, and the inside of the lip of the partition ring 24 in contact with the main shaft 3 is provided with a plurality of connection pieces 241 which are inclined and stacked in a ring shape.

[0059] Further, the oil pump inside the cabin provides stable lubricating oil with static pressure to the inside of the oil chamber 16, so that the lubricating oil can infiltrate the main shaft 3, lubricate and cool the main shaft 3, and the main shaft 3 rotates along the inclined direction of the connection piece 241 during rotation, the movable piece pushes the partition ring 24 to adhere to the main shaft 3, and the lubricating oil also presses the partition ring 24 with an arc-shaped cross section, so that the lip of the partition ring 24 tightly adheres to the main shaft 3, avoiding the sealing of the partition ring 24 and the main shaft 3 due to the round run-out tolerance of the main shaft 3.

[0060] Still further, the rotation direction of the main shaft 3 in the above-mentioned embodiments is clockwise.

[0061] Still further, a valve can be arranged in the air inlet channel 13 in the above-mentioned embodiments to block the gas in the rear guide ring 22 from flowing back to the cabin, when the wind power device stops working, the valve is closed, even if part of the sea wind can break through the movable ring and move to the rear guide ring 22, but due to the closed valve of the air inlet channel 13, the partition ring 24 on both sides of the rear guide ring 22 tightly adheres to the main shaft 3 under the pressure of the lubricating oil, sealing the rear guide ring 22, which can prevent the sea wind from invading the cabin.

[0062] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A floating offshore wind power device, characterized in that: It comprises a main shaft (3) and a mounting shell (1) supporting the main shaft (3), wherein the interior of the mounting shell (1) is provided with: A front guide ring (21) having a plurality of buffer chambers (211) arranged in an array; A rear guide ring (22) having a plurality of connecting cavities (221) arranged in an array; The ventilation cavity (17) is located between the front guide ring (21) and the rear guide ring (22) and is provided with an exhaust hole. The air in the rear cabin is buffered by the rear guide ring (22) and collides with the air passing through the front guide ring (21) and is discharged through the exhaust hole.

2. A floating offshore wind power device according to claim 1, characterized in that: The main shaft (3) is provided with a slope, the front guide ring (21) is fitted on the slope of the main shaft (3), and the buffer chambers (211) are distributed in an array along the inclined direction of the slope.

3. A floating offshore wind power device according to claim 2, characterized in that: An inclined wind guide slope (11) is provided on a side wall of the installation shell (1) close to the slope, and the exhaust hole is located behind the wind guide slope (11).

4. The floating offshore wind power device according to claim 1, characterized in that: An air guide port (212) for the sea breeze to move in the opposite direction is provided between two adjacent buffer chambers (211).

5. The floating offshore wind power device according to claim 1, characterized in that: A rotating ring (23) that rotates synchronously with the main shaft (3) is provided in the middle of the ventilation chamber (17), and the rotating ring (23) rotates to move the rear air to the front.

6. A floating offshore wind power device according to claim 5, characterized in that: The rotating ring (23) comprises a plurality of inclined plates (232) that are press-fitted and fitted onto the main shaft (3) one by one, and a connecting block (231) that is fixedly mounted on the inclined plates (232) and engaged with the mounting shell (1).

7. A floating offshore wind power device according to claim 6, characterized in that: A groove and an elastic portion (233) for closing the groove are provided on the side wall of the inclined plate (232).

8. The floating offshore wind power device according to claim 7, characterized in that: A movable block (234) is provided in a sliding manner inside the inclined plate (232) for resisting and pushing the elastic portion (233) to move.

9. The floating offshore wind power device according to claim 7, characterized in that: A connecting strip is slidably provided on the side wall of the inclined plate (232) opposite to the elastic portion (233), and a plurality of protrusions (236) are provided on the connecting strip.

10. The floating offshore wind power device according to claim 1, characterized in that: The interior of the mounting shell (1) is provided with oil chambers (16) located on both sides of the rear guide ring (22), and the interior of the oil chamber (16) is provided with a spacer ring (24) with an arc-shaped cross section.

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