Rotor bracket of high-power wind driven generator

Abstract

The invention relates to the technical field of wind power generation, and discloses a high-power wind power generator rotor support which comprises at least two rotor support assemblies which are spliced in the circumferential direction to form a complete rotor support, and each rotor support assembly comprises a magnet yoke plate, a front fixing yoke and a rear fixing yoke, the supporting plate is arranged between the magnet yoke plate and the front fixed yoke or the rear fixed yoke; the rotor support further comprises a hub part formed by splicing at least two main rotating shafts in the circumferential direction, the hub part and the rotor support assembly are coaxially arranged, and a plurality of connecting plates for connecting the hub part and the magnet yoke plate are arranged on the outer side of the hub part in the circumferential direction. The rotor support is convenient to manufacture and transport, and the problem that the whole large-diameter rotor support is difficult to transport is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to a rotor bracket for a high-power wind turbine generator. Background Art

[0002] Wind turbines are widely popular in the current wind power generation field due to their high reliability. According to the structural form, they mainly include two forms: inner rotor and inner stator. The stator of the inner stator type generator and the rotor of the inner rotor type generator are supported by corresponding brackets; a magnetic circuit is formed in the rotor and stator of the motor, and the magnetic pressure drop of the magnetic circuit mainly appears at the air gap between the rotor and the stator. Generally speaking, more than about 80% of the magnetic pressure drop appears at this air gap; in order to increase the magnetic density value at the air gap, it is necessary to minimize the magnetic resistance at other positions except the air gap. In the prior art, the method of increasing the thickness of the magnetic yoke between the rotors is adopted to reduce the magnetic resistance of the magnetic yoke, so as to achieve the effect of increasing the magnetic density value at the air gap. However, increasing the thickness of the magnetic yoke will lead to an increase in the overall weight of the rotor bracket and waste of materials; in addition, with the development of technology, the diameter of wind turbines is getting larger and larger. The super-large wind turbines are restricted by the existing transportation roads, which will cause trouble in transportation. At the same time, problems such as uneven circumferential mass distribution are likely to occur during the manufacturing process, and problems such as vibration are likely to occur during the working process. Summary of the Invention

[0003] The purpose of the present invention is to provide a rotor bracket for a high-power wind turbine generator that is connected and fixed through modular design and fixed connecting rods and nuts, making the rotor bracket easy to manufacture and transport, and solving the problem of difficult transportation of the whole large-diameter rotor bracket, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, a rotor bracket for a high-power wind turbine generator is provided, which includes at least two rotor bracket components spliced circumferentially to form a complete rotor bracket. The rotor bracket component includes a magnetic yoke plate and a front fixed yoke and a rear fixed yoke arranged at both ends of the magnetic yoke plate, and also includes a support plate provided between the magnetic yoke plate and the front fixed yoke or the rear fixed yoke; the outer cylinder of the rotor bracket also includes at least two main rotating shafts spliced circumferentially to form a complete hub portion, the hub portion is coaxially arranged with the rotor bracket component, and a plurality of connecting plates connecting the hub portion and the magnetic yoke plate are arranged circumferentially on the outside of the hub portion.

[0005] Further, the support plate includes a front support plate and a rear support plate. The front fixed yoke, the front support plate, the magnetic yoke plate, the rear support plate, and the rear fixed yoke are fixed in sequence in the axial direction by rotating - degrees counterclockwise or clockwise through fixed connecting rods and nuts, and ventilation holes communicating inside and outside are provided on both the front support plate and the rear support plate.

[0006] Further, the front support plate and the rear support plate have the same structure. The front support plate includes a fixed plate which is in a fan shape. The ventilation holes are arranged on the fixed plate. It also includes grooves which are arranged at equal intervals along the circumferential direction of the outer side of the fixed plate, and fixing holes which are arranged at equal intervals along the circumferential directions of the inner and outer sides of the fixed plate. It further includes a positioning plate which is in a fan shape and is integrally connected with the fixed plate. The outer side of the positioning plate is closely attached to the inner side of the outer cylinder of the rotor bracket. Air ducts which are matched with the grooves are provided on the outer side of the outer cylinder of the rotor bracket.

[0007] Further, the hub part includes a front hub fixing plate and a rear hub fixing plate which are respectively arranged at both ends of the main rotating shaft. A plurality of fixing rod holes which penetrate through both ends and are matched with the fixing connecting rods are provided on both the hub part and the outer cylinder of the rotor bracket. The plurality of fixing rod holes are arranged at equal intervals along the circumferential direction.

[0008] Further, a coolant cavity is provided in each yoke plate. The cross-section of the coolant cavity along the axial direction is in a fan shape. The coolant cavity is communicated with the fixing rod holes. An installation groove which is matched with the connecting plate is provided on the inner side of the yoke plate.

[0009] Further, the connecting plates are arranged along the radial direction of the outer cylinder of the rotor bracket. The connecting plates are in a plate shape and are perpendicular to the inner side of the yoke plates. At least one heat dissipation pipe which is arranged along the radial direction of the outer cylinder of the rotor bracket and is communicated with the coolant cavity is provided in each connecting plate. The coolant cavity is communicated with the fixing rod holes. Double-sealed rotary joints which are matched with the fixing connecting rods are provided at both ends of the fixing rod holes.

[0010] Further, an inlet and outlet liquid pipe is provided on the fixing connecting rod along the axis. Double-sealed rotary joints which are matched with the fixing connecting rods are provided at both ends of the fixing rod holes.

[0011] Further, each main rotating shaft is in a hollow shape. The cross-sectional shape of the hollow cavity in the main rotating shaft is the same as the cross-sectional shape of the main rotating shaft. The cavity in the main rotating shaft forms a monitoring cavity.

[0012] Further, both ends of the connecting plate are flush with the end surfaces of the yoke plates and the cross-section of the connecting plate is rectangular. The connecting plate is formed by extending from one end of the yoke plate to the other end along a spiral line from its rectangular cross-section. The heat dissipation pipes in the connecting plate are all arranged along the direction of the yoke plate.

[0013] Further, the connecting plate also includes a diversion plate which penetrates through the front support plate and (or) the rear support plate. The diversion plate is in a spiral fan shape and is integrally connected with the connecting plate. A carbon fiber composite material layer is embedded on the outer side of the fixing connecting rod.

[0014] The present invention has the following beneficial effects on the prior art: 1. The present invention adopts a hollow design for the rotor bracket assembly and the main rotating shaft. The hollow design reduces the mass of the rotor bracket, reduces centrifugal compounding, and then cools the rotor bracket by filling a cooling liquid or a phase change material into the hollow cavity, thereby simplifying the external cooling pipeline.

[0015] 2. In the present invention, the phase change material absorbs heat and melts at high temperatures, solidifies and releases heat at low temperatures, suppressing the instantaneous heat load. The vibration energy is absorbed by the viscosity of the PCM, and the vibration amplitude is reduced by 40%-50%, and the noise is reduced by 10-15 dB.

[0016] 3. The present invention modularizes the rotor bracket, which is formed by splicing multiple components circumferentially, making it convenient to manufacture and transport individual components. Then, by fixing and connecting multiple components after deflecting them by a certain angle, it is avoided that the contact surfaces of the components need to be fixedly connected through additional flanges, making the instruction distribution of the rotor bracket uniform, solving the problem of uneven circumferential mass, greatly reducing the centrifugal force imbalance, and avoiding periodic vibration problems.

[0017] 4. The cooling liquid cavity and the heat dissipation pipe in the yoke plate are filled with a phase change material, and the centrifugal force is used to drive the gas-liquid phase change cycle, reducing the temperature rise of the yoke plate by 15%-20% and improving the heat dissipation efficiency by 30%.

[0018] 5. Due to the spiral extension of the connecting plate and the deflector disturbing the air flow, the air flow moves axially, improving the convective heat dissipation efficiency; the ventilation holes and the air ducts form an internal and external air circulation to assist heat dissipation.

[0019] Generally, through innovations such as modular assembly, self-driven heat dissipation, intelligent monitoring, and dynamic balance control of the rotor bracket of the present invention, the comprehensive goals of high reliability, low maintenance cost, high-efficiency heat dissipation, and long life are achieved. It is especially suitable for harsh scenarios such as high-power offshore wind power, promoting the upgrade of wind turbines towards more efficient, environmentally friendly, and intelligent directions. Brief Description of the Drawings

[0020] Figure 1 It is an axonometric view of the rotor bracket of the present invention; Figure 2 For the present invention Figure 1 Schematic view of A-A; Figure 3 It is a schematic view of the rotor bracket assembly of the present invention; Figure 4 It is an axonometric view of the front support plate of the present invention; Figure 5 It is an axonometric view of the connecting plate of the present invention; Figure 6 For the present invention Figure 5 Axonometric view of B-B; Figure 7 It is an axonometric view of the connecting plate of the present invention; Figure 8 For the present invention Figure 7 is a sectional view; Figure 9 is a schematic diagram of the fixed connecting rod of the present invention; Figure 10 is an axonometric view of the connecting plate of another embodiment of the present invention.

[0021] In the figure: 1. Outer cylinder of the rotor bracket; 101. Rear fixed yoke; 102. Rotor bracket assembly; 103. Front fixed yoke; 104. Yoke plate; 105. Fixed rod hole; 106. Air duct; 107. Coolant cavity; 2. Support plate; 201. Front support plate; 202. Rear support plate; 203. Ventilation hole; 204. Fixed plate; 205. Fixed hole; 206. Positioning plate; 208. Deflector; 207. Groove; 3. Hub part; 301. Rear hub fixing plate; 302. Front hub fixing plate; 303. Main rotating shaft; 304. Monitoring cavity; 4. Connecting plate; 401. Heat dissipation pipe; 402. Threaded pipe; 5. Fixed connecting rod; 501. Liquid inlet and outlet pipe; 502. Carbon fiber composite layer; 6. Nut. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] In one embodiment, as Figure 1-10 shown, a high-power wind turbine rotor bracket includes at least two rotor bracket assemblies 102 spliced circumferentially to form a complete outer cylinder 1 of the rotor bracket. The rotor bracket assembly 102 includes a yoke plate 104 and a front fixed yoke 103 and a rear fixed yoke 101 arranged at both ends of the yoke plate 104, and further includes a support plate 2 provided between the yoke plate 104 and the front fixed yoke 103 or the rear fixed yoke 101; the outer cylinder 1 of the rotor bracket further includes at least two main rotating shafts 303 spliced circumferentially to form a complete hub part 3. The hub part 3 and the rotor bracket assembly 102 are coaxially arranged, and a plurality of connecting plates 4 connecting the hub part 3 and the yoke plate 104 are provided circumferentially on the outside of the hub part 3.

[0024] The support plate 2 includes a front support plate 201 and a rear support plate 202. The front fixed yoke 103, the front support plate 201, the yoke plate 104, the rear support plate 202, and the rear fixed yoke 101 are fixed in the axial direction by rotating 10-30 degrees counterclockwise or clockwise one by one through a fixed connecting rod 5 and a nut 6. Ventilation holes 203 communicating inside and outside are provided on both the front support plate 201 and the rear support plate 202.

[0025] The front support plate 201 and the rear support plate 202 have the same structure. The front support plate 201 includes a fixing plate 204 which is in a fan shape. The ventilation holes 203 are arranged on the fixing plate 204. It also includes grooves 207 which are arranged at equal intervals circumferentially along the outer side surface of the fixing plate 204. It also includes fixing holes 205 which are arranged at equal intervals circumferentially along the inner and outer side surfaces of the fixing plate 204. It also includes a positioning plate 206 which is in a fan shape. The positioning plate 206 is integrally connected with the fixing plate 204. The outer side surface of the positioning plate 206 is closely attached to the inner side surface of the outer cylinder 1 of the rotor bracket. Air ducts 106 which are matched with the grooves 207 are formed on the outer side surface of the outer cylinder 1 of the rotor bracket.

[0026] The hub portion 3 includes a front hub fixing plate 302 and a rear hub fixing plate 301 which are respectively arranged at both ends of the main rotating shaft 303. A plurality of fixing rod holes 105 which penetrate through both ends and are matched with the fixing connecting rods 5 are formed on both the hub portion 3 and the outer cylinder 1 of the rotor bracket. The plurality of fixing rod holes 105 are arranged at equal intervals circumferentially.

[0027] In this embodiment, the rotor bracket is composed of an outer cylinder 1 of the rotor bracket, a support plate 2, a hub portion 3 and a connecting plate 4 and is connected and fixed in a modular form through fixing connecting rods 5 and nuts, so that the rotor bracket is convenient for manufacturing and transportation, and solves the problem of difficult transportation of the whole large-diameter rotor bracket. During installation, first, fix the yoke plate 104 of a single rotor bracket component 102 of the outer cylinder 1 of the rotor bracket to the front support plate 201 and the rear support plate 202 of the support plate 2, that is, closely attach the inner side surface of the yoke plate 104 to the outer side surface of the positioning plate 206, and then rotate the front support plate 201, the yoke plate 104 and the rear support plate 202 by 10 - 30 degrees along the axis and then fix them. For example, when the yoke plate 104 is installed, it rotates 30 degrees in the plane perpendicular to the axis relative to the front support plate 201 and then is fixed. At the same time, the support plate 2 is made of a non-metallic material. Then, install the scattering-shaped connecting plate 4 between the opposite surfaces of the front support plate 201 and the rear support plate 202. Then, install the main rotating shaft 303 of the hub portion 3 between the opposite surfaces of the front support plate 201 and the rear support plate 202. Then, ensure that the included angle line between the main rotating shaft 303 and the yoke plate 104 is collinear, that is, the extension line of the included angle edge line between the main rotating shaft 303 and the yoke plate 104 is collinear with the projection on the front support plate 201 or the rear support plate 202. Subsequently, closely attach the inner side surfaces of the front fixing yoke 103 and the rear fixing yoke 101 to the outer side surface of the positioning plate 206 and rotate them by 10 - 30 degrees along the axis (the plane perpendicular to the axis) and then connect them through the fixing connecting rods 5. Subsequently, connect the front hub fixing plate 302 and the rear hub fixing plate 301 to the front support plate 201 and the rear support plate 202 through the fixing connecting rods 5. The front hub fixing plate 302 and the rear hub fixing plate 301 rotate by 10 - 30 degrees along the axis (the plane perpendicular to the axis) during installation, so as to realize the installation of a single component of the rotor bracket, such asFigure 3 as shown; By fixing and connecting the front fixed yoke 103, rear fixed yoke 101, front support plate 201, yoke plate 104, rear support plate 202, front hub fixing plate 302, main rotating shaft 303, and rear hub fixing plate 301 after deflecting them by a certain angle in a clockwise or counterclockwise direction, it is ensured that no additional fixing flanges need to be installed for adjacent front fixed yoke 103, rear fixed yoke 101, front support plate 201, yoke plate 104, rear support plate 202, front hub fixing plate 302, main rotating shaft 303, and rear hub fixing plate 301. Thus, uneven mass distribution of the rotor bracket in the circumferential direction is avoided, centrifugal force imbalance during high-speed rotation of the rotor is avoided, resulting in periodic vibration, and thus noise is reduced. At the same time, additional inertial resistance during rotor rotation is also avoided, energy consumption is reduced, and problems such as premature failure of the bearing and leakage of the seal due to abnormal vibration and centrifugal force are avoided. Then, since the support plate 2 is made of non-metallic material, electro-corrosion of the rotor bracket and bearing by shaft current is effectively avoided; Subsequently, they are installed in sequence along the rear support plate 202, yoke plate 104, connecting plate 4, main rotating shaft 303, front support plate 201, front fixed yoke 103, rear fixed yoke 101, front hub fixing plate 302, and rear hub fixing plate 301. Finally, concentricity and coaxiality are inspected. Finally, when fixing the fixing nut 6, it is symmetrically installed and concentricity and coaxiality are inspected each time it is installed.

[0028] In one embodiment, a coolant cavity 107 is provided in each yoke plate 104. The cross-section of the coolant cavity 107 along the axial direction is fan-shaped. The coolant cavity 107 is communicated with the fixing rod hole 105. An installation groove for cooperating with the connecting plate 4 is provided on the inner side surface of the yoke plate 104.

[0029] The connecting plate 4 is arranged radially along the outer cylinder 1 of the rotor bracket. The connecting plate 4 is plate-shaped and perpendicular to the inner side surface of the yoke plate 104. At least one heat dissipation tube 401 arranged radially along the outer cylinder 1 of the rotor bracket and communicated with the coolant cavity 107 is provided in each connecting plate 4.

[0030] In this embodiment, by designing the yoke plate 104 to be hollow, the component mass of the outer cylinder 1 of the rotor bracket is reduced, and the load on the outer cylinder 1 of the rotor bracket caused by centrifugal force is reduced. Then, the fixing rod hole 105 is sealed by the fixing connecting rod 5 to prevent coolant from leaking from the coolant cavity 107. Then, heat dissipation is carried out by the coolant filled in the coolant cavity 107 and the heat dissipation tube 401; During operation, an axial current is generated inside the yoke plate 104 under the action of the external magnetic field, and then the yoke plate 104 is heated under the action of the resistance of the yoke plate 104. The generated heat heats the coolant in the cooling liquid chamber 107. After being heated, the coolant turns into gas. The gaseous coolant enters the heat dissipation pipe 401 to release heat, turns back into liquid, and flows back to the cooling liquid chamber 107 under the action of centrifugal force to complete the heat release.

[0031] The fixed connecting rod 5 is provided with a liquid inlet and outlet pipe 501 along the axis, and two ends of the fixed rod hole 105 are provided with a bidirectional sealing rotary joint matched with the fixed connecting rod 5 .

[0032] Each main shaft 303 is hollow, and the cross-sectional shape of the hollow cavity in the main shaft 303 is the same as the cross-sectional shape of the main shaft 303. The cavity in the main shaft 303 constitutes a monitoring cavity 304, and the monitoring cavity 304 is connected to the heat dissipation pipe 401. A threading tube 402 coaxial with the heat dissipation pipe 401 is sleeved in the heat dissipation pipe 401. In this embodiment, the main shaft 303 and the connecting plate 4 are hollowed out to reduce the component mass of the rotor bracket and the load of the centrifugal force on the rotor bracket. Then, the inlet and outlet pipes 501 of the fixed connecting rod 5 pass the optical sensor into the monitoring cavity 304 of the main shaft 303 (through the flexible guide mechanism of the optical fiber threading robot), and the transmission cable passes through the heat dissipation pipe 401 and the fixed connecting rod 5 to connect with the outside world. Then, the optical fiber sensor (integrated MEMS acceleration sensor and laser displacement meter) or strain gauge is used to directly measure the rotor stress distribution, temperature and vibration to prevent overload failure. Since the transmission cable is placed in the heat dissipation pipe 401 and the fixed connecting rod, the interference of electromagnetic interference to the monitoring signal is reduced (traditional monitoring requires external sensors and is susceptible to interference). At the same time, the transmission cable and the sensor can be centrally inspected from the shaft end without removing the external protective cover. Then, the cooling liquid chamber 107 and the heat dissipation pipe 401 are filled with phase change material, and the heat generated by the yoke plate 104 is transferred to the surface of the connecting plate 4 through the heat dissipation pipe 401 through the phase change material in the cooling liquid chamber 107 and the heat dissipation pipe 401 for heat dissipation. Then, the connecting plate 4 connects and fixes the yoke plate 104 and the main shaft 303 while expanding the heat dissipation area for the yoke plate 104. At the same time, the viscosity of the phase change material can effectively absorb the vibration energy of the rotor bracket outer tube 1, thereby reducing the vibration amplitude and noise of the rotor bracket outer tube 1.

[0033] During operation, an axial current is generated inside the yoke plate 104 under the action of an external magnetic field. Then, due to the resistance of the yoke plate 104, the yoke plate 104 heats up. The generated heat heats the coolant in the coolant chamber 107. After the phase change material is heated, a phase change occurs, and the heat is conducted from the coolant chamber 107 into the heat dissipation tube 401, so that the heat is conducted through the heat dissipation tube 401 to the outer side surface of the connecting plate 4 for heat dissipation, achieving self-driven cooling. Then, since the outer cylinder 1 of the rotor bracket disturbs the air during rotation, the heat transfer efficiency of the connecting plate 4 is improved.

[0034] Both ends of the connecting plate 4 are flush with the end surfaces of the yoke plate 104, and the cross-section of the connecting plate 4 is rectangular. The connecting plate 4 is formed by extending along a spiral line from one end of the yoke plate 104 to the other end of the yoke plate 104 with its rectangular cross-section. The heat dissipation tubes 401 in the connecting plate 4 are all arranged along the direction of the yoke plate 104.

[0035] The connecting plate 4 further includes a guide plate 208 that penetrates through the front support plate 201 and / or the rear support plate 202. The guide plate 208 is in the shape of a spiral fan blade. The guide plate 208 is integrally connected to the connecting plate 4. A carbon fiber composite layer 502 is fitted on the outer side surface of the fixed link 5, and a centrally symmetric pin shaft groove is provided on the inner side surface of the hub portion 3.

[0036] In this embodiment, since the connecting plate 4 is spiral, a thrust along the axis is generated on the air during the rotation of the connecting plate 4, so that the air moves axially along the rotor bracket, thereby accelerating the air flow velocity. This enables the connecting plate 4 to not only connect and support the yoke plate 104 and the main rotating shaft 303, but also act as a fan blade to push the air to flow, making the heat dissipation effect of the connecting plate 4 better. Then, the flowing air is guided into the air duct 106 under the action of the guide plate 208 after passing through the ventilation holes 203, accelerating the wind speed outside the rotor bracket, accelerating the heat exchange with the external medium, and forming a dual heat dissipation mechanism of conduction - convection. The heated air is pumped into the interior of the rotor bracket again through the other end of the air duct 106, improving the overall heat dissipation efficiency and ensuring the stable operation of the equipment under high-temperature conditions.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A high-power wind turbine rotor bracket, comprising at least two rotor bracket components spliced circumferentially to form a complete rotor bracket, characterized in that: The rotor support assembly includes a yoke plate, a front fixed yoke and a rear fixed yoke arranged at both ends of the yoke plate, and further includes a support plate provided between the yoke plate and the front fixed yoke or the rear fixed yoke; the outer cylinder of the rotor support further includes at least two main rotating shafts spliced circumferentially to form a complete hub portion, the hub portion is coaxially arranged with the rotor support assembly, and a plurality of connecting plates connecting the hub portion and the yoke plate are provided circumferentially on the outer side of the hub portion.

2. The high-power wind turbine rotor bracket according to claim 1, wherein: The support plate includes a front support plate and a rear support plate. The front fixed yoke, the front support plate, the yoke plate, the rear support plate and the rear fixed yoke are fixed by fixing connecting rods and nuts by rotating - degrees one by one in the axial direction in the counterclockwise or clockwise direction. Ventilation holes communicating inside and outside are provided on both the front support plate and the rear support plate.

3. The high-power wind turbine rotor bracket according to claim 2, wherein: The front support plate and the rear support plate have the same structure. The front support plate includes a fixing plate, the fixing plate is fan-shaped, the ventilation holes are provided on the fixing plate, and further includes grooves, the grooves are arranged at equal intervals circumferentially on the outer side surface of the fixing plate, and further includes fixing holes, the fixing holes are arranged at equal intervals circumferentially on the inner and outer side surfaces of the fixing plate, and further includes a positioning plate, the positioning plate is fan-shaped, the positioning plate is integrally connected with the fixing plate, the outer side surface of the positioning plate is closely attached to the inner side surface of the outer cylinder of the rotor support, and air ducts matching the grooves are provided on the outer side surface of the outer cylinder of the rotor support.

4. The high-power wind turbine rotor bracket according to claim 3, wherein: The hub portion includes a front hub fixing plate and a rear hub fixing plate respectively arranged at both ends of the main rotating shaft. A plurality of fixing rod holes penetrating through both ends and matching with the fixing connecting rods are provided on both the hub portion and the outer cylinder of the rotor support, and the plurality of fixing rod holes are arranged at equal intervals circumferentially.

5. The rotor bracket of the high-power wind turbine according to claim 4, characterized in that: A coolant cavity is provided in each yoke plate, the cross-section of the coolant cavity along the axial direction is fan-shaped, the coolant cavity is communicated with the fixing rod holes, and an installation groove matching with the connecting plate is provided on the inner side surface of the yoke plate.

6. The high-power wind turbine rotor bracket according to claim 5, characterized in that: The connecting plates are arranged radially along the outer cylinder of the rotor support, the connecting plates are plate-shaped, the connecting plates are perpendicular to the inner side surface of the yoke plate, and at least one heat dissipation pipe arranged radially along the outer cylinder of the rotor support and communicated with the coolant cavity is provided in each connecting plate. The coolant cavity is communicated with the fixing rod holes, and two-way sealing rotary joints matching with the fixing connecting rods are provided at both ends of the fixing rod holes.

7. The rotor bracket of the high-power wind turbine according to claim 6, wherein: The fixing connecting rod is provided with an inlet and outlet liquid pipe along the axis, and two-way sealing rotary joints matching with the fixing connecting rod are provided at both ends of the fixing rod holes.

8. The rotor bracket of the high-power wind turbine according to claim 1, characterized in that: Each main rotating shaft is hollow, the cross-sectional shape of the hollow cavity in the main rotating shaft is the same as the cross-sectional shape of the main rotating shaft, and the cavity in the main rotating shaft constitutes a monitoring cavity.

9. The large-power wind turbine rotor bracket according to claim 8, characterized in that: Both ends of the connecting plate are flush with the end surface of the yoke plate and the cross-section of the connecting plate is rectangular. The connecting plate is formed by extending from one end of the yoke plate to the other end of the yoke plate along a spiral line from its rectangular cross-section, and the heat dissipation pipes in the connecting plate are all arranged along the direction of the yoke plate.

10. The rotor bracket of the high-power wind turbine according to claim 9, characterized in that: The connecting plate further includes a flow guiding plate penetrating through the front support plate and (or) the rear support plate, the flow guiding plate is spiral fan-shaped, the flow guiding plate is integrally connected with the connecting plate, and a carbon fiber composite material layer is embedded on the outer side surface of the fixing connecting rod.

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