Offshore wind power frequency converter

Abstract

The invention relates to the technical field of offshore wind power generation, in particular to an offshore wind power frequency changer which comprises a frequency changer body, a heat dissipation assembly, a mounting assembly, a rotating mechanism and a moving assembly. The frequency conversion machine body is suitable for related power devices of offshore wind power, and the heat dissipation assembly is installed below the frequency conversion machine body. The mounting assembly is mounted below the heat dissipation assembly, and the mounting assembly drives the rotating assembly to rotate through the windward block; the rotating mechanism is mounted in the mounting assembly, the rotating mechanism is provided with a first fan blade and a second fan blade, and the first fan blade and the second fan blade are blown by wind to drive the rotating mechanism to rotate; and the moving assembly is mounted on the mounting assembly, and the moving assembly slides under the driving of the rotating mechanism so as to control the opening and closing of the ventilation opening in the heat dissipation assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to a frequency converter for offshore wind power generation. Background Art

[0002] Offshore wind power is a renewable energy technology that uses offshore wind energy resources to produce electricity. Compared with onshore wind power, offshore wind power has many advantages, such as higher and more stable wind speeds, which can provide higher power generation efficiency. The following are some of the main characteristics and technical challenges of offshore wind power: Efficient wind energy resources: The wind speed at sea is usually stronger and more stable than on land, especially in deep sea areas far from the coast, so the power generation efficiency of offshore wind farms is usually higher. Small environmental impact: Unlike traditional coal-fired and gas-fired power plants, offshore wind power generation has almost no greenhouse gas emissions, so it is of great significance to reduce carbon footprint. Large-scale application potential: Offshore wind farms can be arranged very widely, so there is a large space for expansion of installed capacity, which is suitable for meeting the growing demand for electricity.

[0003] The frequency converter is a device used to change the frequency of electric power. It is widely used in the fields of industry, agriculture, wind power, ocean energy, etc. Its main function is to convert the input power frequency into the required frequency to meet the power frequency requirements of the equipment or system. The working principle of the frequency converter is usually based on the following steps: Rectification: The input alternating current (AC) is first converted into direct current (DC) through a rectifier circuit. Filtering: The DC power is filtered to remove high-frequency noise and fluctuations. The filtered DC power is inverted into AC power. During inversion, the frequency and amplitude of the output current can be adjusted to meet the requirements of the load equipment. Output: Finally, the output AC power after inversion will have an adjustable frequency and amplitude. In a wind power system, wind turbines usually output variable frequency current (that is, the frequency changes due to changes in wind speed). The frequency converter can convert it into a fixed frequency current that matches the grid frequency for grid connection. The existing offshore wind power frequency converter has a relatively harsh working environment and needs to withstand the influence of strong winds and humid environments for a long time, resulting in poor working stability of the frequency converter.

[0004] In view of the above situation, in order to overcome the above technical problems, the present invention designs a frequency converter for offshore wind power, which solves the above technical problems. Summary of the invention

[0005] The technical purpose to be achieved by the present invention is to design a frequency converter for offshore wind power, detect the size of the wind force through a rotating mechanism, thereby driving the mobile component to move. When the wind and waves are strong, the mobile control block closes the vents to reduce the impact of strong winds and improve the stability of the frequency converter.

[0006] In order to achieve the above technical objectives, the present invention provides the following technical solutions:

[0007] A frequency converter for offshore wind power generation includes a frequency converter body, a heat dissipation component, a mounting component, a rotating mechanism and a moving component. The frequency converter is designed to meet the special requirements of the offshore wind power environment, especially to maintain the stability and efficiency of the equipment under strong wind and wave conditions.

[0008] The inverter body is the core part of the entire system and is mainly suitable for related power devices of offshore wind power. It can convert the variable frequency current generated by the wind turbine into stable alternating current and transmit it to the land through the power grid. In order to ensure the continuous and stable operation of the inverter in harsh environments, the system is equipped with a heat dissipation component. The heat dissipation component is installed under the inverter body and plays an important role in heat dissipation to prevent the performance degradation or failure of the equipment due to overheating. The environment of offshore wind farms is changeable, and the inverter may face the problem of insufficient heat dissipation when running for a long time. Therefore, the design of the heat dissipation component is crucial to ensure that the equipment can still maintain a good working condition under wind speed fluctuations and temperature changes.

[0009] The mounting assembly is installed under the heat dissipation assembly. The mounting assembly not only supports and fixes the heat dissipation assembly, but also drives the rotating mechanism to rotate through the windward block. The windward block is uniquely designed and can automatically adjust its angle according to the change of wind direction, thereby effectively using wind power to drive the operation of the rotating mechanism. The mounting assembly provides a stable platform for the operation of the rotating mechanism, while ensuring the overall structure and reliability of the system.

[0010] The rotating mechanism is an important part of the inverter and is installed inside the mounting assembly. The rotating mechanism consists of the first blade and the second blade, which are designed to allow the wind to drive the rotating mechanism to rotate through the rotation of the wind rotor blades. When the wind speed is high, the rotating mechanism will rotate rapidly, using the kinetic energy of the wind to convert into mechanical energy. The different designs of the first blade and the second blade allow the rotating mechanism to be flexibly adjusted in the face of different wind speeds, ensuring that the system can automatically adjust according to external environmental conditions.

[0011] The moving component is installed above the mounting component and is tightly connected to the rotating mechanism. The function of the moving component is to slide through the driving of the rotating mechanism to control the opening and closing of the vents in the heat dissipation component. When the wind speed is high, the moving component will drive the vents to close to reduce the impact of strong wind on the inverter.

[0012] The heat dissipation assembly is composed of a shell, heat dissipation fins, a sealing plate and vents, and is intended to effectively improve the heat dissipation performance of the frequency converter. The shell is installed below the frequency converter body to protect and support it and ensure the stability of the internal components. The heat dissipation fins are arranged inside the shell to promote the rapid dissipation of heat by increasing the surface area, ensuring that the frequency converter maintains a suitable temperature when running at high load. The sealing plate is installed on one side of the shell to prevent dust and water, enhance the sealing of the heat dissipation assembly, and prevent external pollutants from entering the interior. The vents are opened on the sealing plate to ensure air circulation, provide sufficient heat dissipation channels, and further improve the heat dissipation effect, thereby ensuring that the frequency converter can operate continuously and stably during operation.

[0013] The vents are arranged as two circular structures, one larger in the middle and one smaller on both sides, and the three circles are arranged in communication with each other. It can effectively balance the air circulation and heat dissipation effect. The larger circular vent in the middle provides a wider air flow inlet, which helps to increase the inflow of air and improve the heat dissipation efficiency. The smaller circular vents on both sides can control the distribution of airflow, avoid excessive concentration or uneven flow of air, thereby ensuring the stability and uniformity of air circulation. In addition, the arrangement of the three circular vents being connected can effectively reduce the resistance of airflow, allowing the air to flow smoothly, thereby improving the overall heat dissipation performance and ensuring that the equipment can still maintain a low temperature when working under high load.

[0014] The installation assembly consists of a mounting sleeve, a windward block, a mounting block and a rotation hole, and is designed to provide stable installation and convenient adjustment functions. The mounting sleeve is fixed to the bottom of the outer shell, which plays a supporting and connecting role to ensure the stable installation of other components. The windward block is installed on the side of the mounting sleeve, mainly used to guide the airflow, enhance air flow, and optimize heat dissipation performance. The mounting block is installed on the top of the mounting sleeve, and through the connection with other structures, the firmness and reliability of the component are ensured. The rotation hole is opened inside the mounting sleeve, providing an adjustable rotation interface, allowing the component to adjust the angle or position as needed to adapt to different installation requirements. The overall design improves the flexibility and stability of the installation and ensures the long-term and efficient operation of the system.

[0015] A rectangular groove is provided on the top of the mounting block, which is mainly used to accommodate other components or accessories to ensure that they are firmly fixed on the mounting block. A limiting slide groove is provided on the inner side of the mounting block to limit the movement of the connecting parts and prevent the parts from shifting or loosening. The cross-sectional shape of the limiting slide groove is designed to be trapezoidal, which can effectively enhance the stability of the sliding contact, allowing the connecting parts to move smoothly in the slide groove while preventing the position from changing due to external forces, thereby ensuring the accuracy and stability of the system. This design makes the mounting block highly adaptable and reliable during use.

[0016] The rotating mechanism is composed of a rotating shaft, a first fan blade and a first mating pin, and is intended to provide a smooth rotation function. The rotating shaft is installed inside the mounting assembly, as the core component of the entire rotating mechanism, responsible for supporting and driving the rotating action. The first fan blade is installed on the side of the rotating shaft, which can cut the air or fluid during the rotation process, play a guiding or driving role, and improve the efficiency of the system. The first mating pin is installed on the side of the rotating shaft for connecting with other mating parts to ensure the stability and accuracy of the rotating shaft and prevent looseness or deviation. The design of the rotating mechanism effectively combines the rotating shaft, fan blades and mating pins together to achieve smooth and efficient rotation operation, meeting the system's requirements for power transmission and fluid guidance.

[0017] The rotating mechanism also includes a connecting ring, a second fan blade and a second matching pin, which further enhances the stability and efficiency of the rotating system. The connecting ring is arranged on the side of the rotating shaft, and plays the role of connecting the rotating shaft with other components to ensure the close fit between the components. The second fan blade is installed on the side of the connecting ring, and can work with the first fan blade during the rotation process to enhance the flow effect of air or fluid and improve the overall heat dissipation or driving performance. The second matching pin is installed on the top of the connecting ring, which is responsible for precise matching with other related components to ensure the stability and accuracy of the rotating parts and prevent deviation or looseness. The overall design makes the rotating mechanism more stable and efficient during operation through reasonable matching of components, thereby improving the reliability and durability of the system.

[0018] The rotating mechanism also includes rotating balls, and a circumferential array of rotating balls is arranged at the lower end of the rotating shaft. The rotating balls are used to reduce the friction force during the rotation of the rotating shaft.

[0019] The moving assembly is composed of multiple precision components, designed to provide smooth and flexible movement functions and ensure coordinated operation between various components. First, the moving block is installed inside the mounting assembly to support and guide the movement, ensuring that the entire assembly can slide smoothly on the specified track. The limit block is set on the side of the moving block to limit the movement range of the moving block to prevent it from exceeding the predetermined position, ensuring the accuracy and safety of the system during operation. The matching groove is opened in the middle of the moving block, and the matching groove is arranged horizontally. This design can effectively guide and fix other related components and enhance the stability and flexibility of the system.

[0020] In addition, the mobile assembly also includes a fixed block, a fixed rod and a control block, which further improves the control and stability of the system. The fixed block is installed at one end of the mobile block to ensure that the mobile block is fixed in position to avoid position deviation. The fixed rod is installed on the fixed block to connect other structural parts and provide additional support to enhance the stability of the system. The control block is installed on the fixed rod and is usually used to control the movement of the entire mobile assembly. It can adjust the movement mode of the assembly according to needs, such as achieving precise positioning, adjusting the moving speed or direction, etc.

[0021] Through this structural design, the mobile components achieve a high degree of coordination and flexibility, ensuring the efficient operation of each component and meeting the requirements for movement accuracy and stability in various working environments.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The present invention detects the size of the wind force through a rotating mechanism, thereby driving the mobile component to move. When the wind and waves are strong, the mobile control block closes the vents to reduce the impact of strong winds and improve the stability of the inverter. Through wind force detection and automatic control of the vents, the inverter can maintain stable operation under different wind speed conditions, avoiding equipment instability or failure caused by changes in the external environment (such as strong winds or waves). The vent state can be automatically adjusted according to changes in wind force, avoiding the complexity of human intervention and adapting to different environmental conditions.

[0024] (2) The present invention can effectively prevent the direct impact of strong winds on equipment through automatic response to strong winds, reduce mechanical wear, vibration, overheating and other problems caused by strong winds, and thus reduce maintenance frequency and costs. In offshore wind farms, the waves and wind power fluctuate greatly. The technology of the present invention can help the frequency converter to perform adaptive adjustments under different wind speed conditions to prevent system instability caused by strong winds or surges. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2It is a schematic diagram of the installation position of the frequency converter body and the heat dissipation component of the present invention;

[0029] Figure 3 It is a schematic diagram of the positions of the installation components, the rotating mechanism and the moving components of the present invention;

[0030] Figure 4 is a cross-sectional view of the heat dissipation assembly of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the installation assembly of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the rotating mechanism of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the mobile component of the present invention.

[0034] In the figure: 1. frequency converter body; 2. heat dissipation component; 21. shell; 22. heat dissipation fins; 23. sealing plate; 24. vent; 3. mounting component; 31. mounting sleeve; 32. windward block; 33. mounting block; 34. limiting slide groove; 35. rotating hole; 4. rotating mechanism; 41. rotating shaft; 42. first fan blade; 43. connecting ring; 44. second fan blade; 45. first matching pin; 46. second matching pin; 47. rotating ball; 5. moving component; 51. moving block; 52. limiting block; 53. matching groove; 54. fixing block; 55. fixing rod; 56. control block. DETAILED DESCRIPTION

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] like Figure 1-7 As shown, a frequency converter for offshore wind power includes a frequency converter body 11, a heat dissipation component 2, a mounting component 3, a rotating mechanism 4 and a moving component 5. The frequency converter is designed to meet the special needs of the offshore wind power environment, especially to maintain the stability and efficiency of the equipment under strong wind and wave conditions.

[0037] The inverter body 11 is the core part of the entire system and is mainly suitable for related power devices of offshore wind power. It can convert the variable frequency current generated by the wind turbine into stable alternating current and transmit it to the land through the power grid. In order to ensure the continuous and stable operation of the inverter in harsh environments, the system is equipped with a heat dissipation component 2. The heat dissipation component 2 is installed under the inverter body 11 and plays an important role in heat dissipation to prevent the performance degradation or failure of the equipment due to overheating. The environment of offshore wind farms is changeable, and the inverter may face the problem of insufficient heat dissipation when running for a long time. Therefore, the design of the heat dissipation component 2 is crucial to ensure that the equipment can still maintain a good working condition under wind speed fluctuations and temperature changes.

[0038] The mounting assembly 3 is installed below the heat dissipation assembly 2. The mounting assembly 3 not only supports and fixes the heat dissipation assembly 2, but also drives the rotating mechanism 4 to rotate through the windward block 32. The windward block 32 is uniquely designed and can automatically adjust its angle according to the change of wind direction, thereby effectively using wind power to drive the operation of the rotating mechanism 4. The mounting assembly 3 provides a stable platform for the operation of the rotating mechanism 4, while ensuring the overall structure and reliability of the system.

[0039] The rotating mechanism 4 is an important part of the frequency converter and is installed inside the mounting assembly 3. The rotating mechanism 4 is composed of a first blade 42 and a second blade 44, which are designed to allow the wind to drive the rotating mechanism 4 to rotate through the rotation of the wind rotor blades. When the wind speed is high, the rotating mechanism 4 will rotate rapidly, using the kinetic energy of the wind to convert into mechanical energy. The different designs of the first blade 42 and the second blade 44 allow the rotating mechanism 4 to be flexibly adjusted when facing different wind speeds, ensuring that the system can automatically adjust according to external environmental conditions.

[0040] The moving component 5 is installed above the mounting component 3 and is tightly connected to the rotating mechanism 4. The function of the moving component 5 is to slide driven by the rotating mechanism 4 to control the opening and closing of the vent 24 in the heat dissipation component 2. When the wind speed is high, the moving component 5 will drive the vent 24 to close, reducing the impact of strong wind on the inverter.

[0041] like Figure 4As shown, the heat dissipation component 2 is composed of a shell 21, heat dissipation fins 22, a sealing plate 23 and a vent 24, which is intended to effectively improve the heat dissipation performance of the frequency converter. The shell 21 is installed below the frequency converter body 11 to protect and support the stability of the internal components. The heat dissipation fins 22 are arranged inside the shell 21 to promote the rapid dissipation of heat by increasing the surface area, ensuring that the frequency converter maintains a suitable temperature when running at high load. The sealing plate 23 is installed on one side of the shell 21 to prevent dust and water, enhance the sealing of the heat dissipation component 2, and prevent external pollutants from entering the interior. The vent 24 is opened on the sealing plate 23 to ensure air circulation, provide sufficient heat dissipation channels, and further improve the heat dissipation effect, thereby ensuring that the frequency converter can operate continuously and stably during operation.

[0042] The vents 24 are arranged as two circular structures, one larger in the middle and one smaller on both sides, and the three circular structures are arranged in communication with each other. It can effectively balance the air circulation and heat dissipation effect. The larger circular vent 24 in the middle provides a wider air flow inlet, which helps to increase the inflow of air and improve the heat dissipation efficiency. The smaller circular vents 24 on both sides can control the distribution of airflow, avoid excessive concentration or uneven flow of air, thereby ensuring the stability and uniformity of air circulation. In addition, the arrangement of the three circular vents 24 being in communication with each other can effectively reduce the resistance of airflow, allowing the air to flow smoothly, thereby improving the overall heat dissipation performance and ensuring that the equipment can still maintain a low temperature when working under high load.

[0043] like Figure 5 As shown, the mounting assembly 3 is composed of a mounting sleeve 31, a windward block 32, a mounting block 33 and a rotation hole 35, which is intended to provide stable installation and convenient adjustment functions. The mounting sleeve 31 is fixed to the bottom of the housing 21, and plays a supporting and connecting role to ensure the stable installation of other components. The windward block 32 is installed on the side of the mounting sleeve 31, and is mainly used to guide the airflow, enhance air flow, and optimize heat dissipation performance. The mounting block 33 is installed on the top of the mounting sleeve 31, and through the connection with other structures, the firmness and reliability of the assembly are ensured. The rotation hole 35 is opened inside the mounting sleeve 31, providing an adjustable rotation interface, allowing the assembly to adjust the angle or position as needed to adapt to different installation requirements. The overall design improves the flexibility and stability of the installation and ensures the long-term and efficient operation of the system.

[0044] A rectangular groove is provided on the top of the mounting block 33, which is mainly used to accommodate other components or accessories to ensure that they are firmly fixed on the mounting block 33. A limiting slide groove 34 is provided on the inner side of the mounting block 33 to limit the movement of the connecting parts and prevent the parts from shifting or loosening. The cross-sectional shape of the limiting slide groove 34 is designed to be trapezoidal, which can effectively enhance the stability of the sliding contact, so that the connecting parts can move smoothly in the slide groove while preventing the position from changing due to external forces, thereby ensuring the accuracy and stability of the system. This design makes the mounting block 33 have high adaptability and reliability during use.

[0045] like Figure 6 As shown, the rotating mechanism 4 is composed of a rotating shaft 41, a first fan blade 42 and a first matching pin 45, and is intended to provide a smooth rotation function. The rotating shaft 41 is installed inside the mounting assembly 3, as the core component of the entire rotating mechanism 4, responsible for supporting and driving the rotating action. The first fan blade 42 is installed on the side of the rotating shaft 41, which can cut air or fluid during the rotation process, play a guiding or driving role, and improve the efficiency of the system. The first matching pin 45 is installed on the side of the rotating shaft 41, for connecting with other matching parts, ensuring the stability and accuracy of the rotating shaft 41, and preventing looseness or deviation. The design of the rotating mechanism 4 effectively combines the rotating shaft 41, the fan blades and the matching pins together, realizes a smooth and efficient rotation operation, and meets the system's requirements for power transmission and fluid guidance.

[0046] The rotating mechanism 4 also includes a connecting ring 43, a second fan blade 44 and a second matching pin 46, which further enhances the stability and efficiency of the rotating system. The connecting ring 43 is arranged on the side of the rotating shaft 41, and plays the role of connecting the rotating shaft 41 with other components to ensure the close fit between the components. The second fan blade 44 is installed on the side of the connecting ring 43, and can work with the first fan blade 42 during the rotation process to enhance the flow effect of air or fluid and improve the overall heat dissipation or driving performance. The second matching pin 46 is installed on the top of the connecting ring 43, and is responsible for accurately matching with other related components to ensure the stability and accuracy of the rotating parts and prevent deviations or loosening. The overall design makes the rotating mechanism 4 more stable and efficient during operation through reasonable component matching, thereby improving the reliability and durability of the system.

[0047] The rotating mechanism 4 further includes rotating balls 47, which are arranged in a circular array at the lower end of the rotating shaft 41. The rotating balls 47 are used to reduce the friction force during the rotation of the rotating shaft 41.

[0048] like Figure 7As shown, the moving assembly 5 is composed of a plurality of precision components, which is designed to provide a smooth and flexible moving function and ensure the coordinated operation between the various components. First, the moving block 51 is installed inside the mounting assembly 3 to support and guide the movement, ensuring that the entire assembly can slide smoothly on the specified track. The limit block 52 is arranged on the side of the moving block 51 to limit the moving range of the moving block 51 to prevent it from exceeding the predetermined position, thereby ensuring the accuracy and safety of the system during operation. The matching groove 53 is opened in the middle of the moving block 51, and the matching groove 53 is arranged horizontally. This design can effectively guide and fix other related components and enhance the stability and flexibility of the system.

[0049] In addition, the mobile component 5 also includes a fixed block 54, a fixed rod 55 and a control block 56, which further improves the control and stability of the system. The fixed block 54 is installed at one end of the mobile block 51 to ensure that the position of the mobile block 51 is fixed to avoid position deviation. The fixed rod 55 is installed on the top of the fixed block 54, connecting other structural parts and providing additional support force to enhance the stability of the system. The control block 56 is installed on the top of the fixed rod 55, and is usually used to control the movement of the entire mobile component 5. It can adjust the movement mode of the component according to needs, such as achieving precise positioning, adjusting the moving speed or direction, etc.

[0050] Through this structural design, the mobile component 5 achieves a high degree of coordination and flexibility, ensures the efficient operation of each component, and meets the requirements for movement accuracy and stability in various working environments.

[0051] During operation of the present invention, the mounting assembly 3 is fixed to the power device of offshore wind power, and the sea breeze enters the housing 21 through the vents 24 to dissipate heat to the heat dissipation fins 22;

[0052] When the sea breeze is strong, the windward block 32 introduces the sea breeze into the installation sleeve 31, and the sea breeze continuously pushes the first blade 42 and the second blade 44 backward. At this time, the rotating shaft 41 and the connecting ring 43 rotate to a certain angle, and the first matching pin 45 and the second matching pin 46 fixedly installed thereon will drive the moving block 51 to translate in the matching groove 53, thereby pushing the control block 56 close to the vent 24, thereby reducing the wind volume; when the sea breeze is stronger, the control block 56 and the vent 24 overlap, and the vent is completely closed.

[0053] Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein. Although one or more exemplary embodiments of the present disclosure have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined in the appended claims.

Claims

1. A frequency converter for offshore wind power, characterized in that: It comprises a frequency converter body (11), a heat dissipation component (2), a mounting component (3), a rotating mechanism (4) and a moving component (5); The frequency converter body (11) is suitable for related power devices of offshore wind power, and the heat dissipation component (2) is installed below the frequency converter body (11); The mounting assembly (3) is mounted below the heat dissipation assembly (2), and the mounting assembly (3) drives the rotating mechanism (4) to rotate via the windward block (32); The rotating mechanism (4) is installed inside the mounting assembly (3), and the rotating mechanism (4) is provided with a first fan blade (42) and a second fan blade (44). When the first fan blade (42) and the second fan blade (44) are blown by wind, the rotating mechanism (4) will be driven to rotate; The moving component (5) is installed on the mounting component (3), and the moving component (5) slides under the drive of the rotating mechanism (4) to control the opening and closing of the vent (24) in the heat dissipation component (2).

2. The frequency converter for offshore wind power according to claim 1, characterized in that: The heat dissipation assembly (2) comprises a housing (21), heat dissipation fins (22), a sealing plate (23) and a vent (24); The housing (21) is installed below the inverter body (11), the heat dissipation fins (22) are arranged inside the housing (21), the sealing plate (23) is installed on one side of the housing (21), and the ventilation opening (24) is opened on the sealing plate (23).

3. The frequency converter for offshore wind power according to claim 2, characterized in that: The ventilation openings (24) are arranged as two circular structures with a larger middle one and smaller ones on both sides, and the three circles are arranged in communication with each other.

4. The frequency converter for offshore wind power according to claim 1, characterized in that: The mounting assembly (3) comprises a mounting sleeve (31), a windward block (32), a mounting block (33) and a rotation hole (35); The mounting sleeve (31) is mounted below the housing (21), the windward block (32) is mounted on the side of the mounting sleeve (31), the mounting block (33) is mounted on the top of the mounting sleeve (31), and the rotating hole (35) is provided inside the mounting sleeve (31).

5. The frequency converter for offshore wind power according to claim 4, characterized in that: A rectangular groove is provided on the upper surface of the mounting block (33), and a limiting sliding groove (34) is provided on the inner side surface of the mounting block (33). The cross-sectional shape of the limiting sliding groove (34) is set to be a trapezoid.

6. The frequency converter for offshore wind power according to claim 1, characterized in that: The rotating mechanism (4) comprises a rotating shaft (41), a first fan blade (42), and a first matching pin (45); The rotating shaft (41) is installed inside the mounting assembly (3), the first fan blade (42) is installed on the side of the rotating shaft (41), and the first matching pin (45) is installed on the side of the rotating shaft (41).

7. The frequency converter for offshore wind power according to claim 6, characterized in that: The rotating mechanism (4) further comprises a connecting ring (43), a second fan blade (44) and a second matching pin (46); The connecting ring (43) is arranged on the side of the rotating shaft (41), the second fan blade (44) is installed on the side of the connecting ring (43), and the second matching pin (46) is installed on the upper connecting ring (43).

8. The frequency converter for offshore wind power according to claim 7, characterized in that: The rotating mechanism (4) further comprises rotating balls (47), wherein the rotating balls (47) are arranged in a circular array at the lowermost end of the rotating shaft (41).

9. The frequency converter for offshore wind power according to claim 1, characterized in that: The moving assembly (5) comprises a moving block (51), a limiting block (52) and a matching groove (53); The moving block (51) is installed inside the mounting assembly (3), the limiting block (52) is arranged on the side of the moving block (51), the matching groove (53) is opened in the middle of the moving block (51), and the matching groove (53) is arranged horizontally.

10. A frequency converter for offshore wind power according to claim 9, characterized in that: The moving assembly (5) further comprises a fixing block (54), a fixing rod (55) and a control block (56); The fixed block (54) is mounted on one end of the moving block (51), the fixed rod (55) is mounted on the fixed block (54), and the control block (56) is mounted on the fixed rod (55).

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