Frequency converter for offshore wind power

Abstract

The application relates to the offshore wind power technology field, in particular to a frequency converter for offshore wind power, which comprises a frequency converter body, a heat dissipation assembly, a mounting assembly, a rotating mechanism and a moving assembly. The frequency converter body is suitable for related power devices of offshore wind power, the heat dissipation assembly is installed below the frequency converter body, the mounting assembly is installed below the heat dissipation assembly, the mounting assembly drives the rotating assembly to rotate through the wind block, the rotating mechanism is installed in the mounting assembly, the rotating mechanism is provided with first and second fan blades, the first and second fan blades are driven to rotate by the wind, the moving assembly is installed above the mounting assembly, the moving assembly is driven to slide by the rotating mechanism, and the moving assembly controls the opening and closing of the air vent in the heat dissipation assembly.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power generation technology, and more specifically to a frequency converter for offshore wind power. Background Technology

[0002] Offshore wind power is a renewable energy technology that utilizes offshore wind energy resources to produce electricity. Compared to onshore wind power, offshore wind power has many advantages, such as higher and more stable wind speeds, thus providing higher power generation efficiency. Here are some key characteristics and technical challenges of offshore wind power: Highly Efficient Wind Resources: Offshore wind speeds are generally stronger and more stable than onshore winds, especially in deep-sea areas far from the coast, resulting in typically higher power generation efficiency for offshore wind farms. Lower Environmental Impact: Unlike traditional coal-fired and gas-fired power plants, offshore wind power emits almost no greenhouse gases, making it significant for reducing carbon footprints. Large-Scale Application Potential: Offshore wind farms can be deployed over very large areas, offering significant potential for capacity expansion to meet growing electricity demand.

[0003] A frequency converter is a device used to change the frequency of electrical power, widely used in industry, agriculture, wind power, and marine energy. Its main function is to convert the input power frequency into the required frequency to meet the power frequency requirements of equipment or systems. The working principle of a frequency converter is generally based on the following steps: Rectification: The input alternating current (AC) is first converted into direct current (DC) by a rectifier circuit. Filtering: The DC power is filtered to remove high-frequency noise and fluctuations. The filtered DC power is then inverted back 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 inverted AC power output will have an adjustable frequency and amplitude. In wind power systems, wind turbine generators typically output variable frequency current (i.e., frequency changes due to wind speed variations). A frequency converter can convert this into a fixed frequency current that matches the grid frequency for grid connection. Existing frequency converters used in offshore wind power operate in harsh environments, needing to withstand long-term exposure to strong winds and humidity, resulting in poor operational stability.

[0004] In view of the above, 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 objective of this invention is to design a frequency converter for offshore wind power, which uses a rotating mechanism to detect the wind force and thus move the moving components. When the wind and waves are large, the moving control block closes the ventilation opening to reduce the impact of strong winds and improve the stability of the frequency converter.

[0006] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution:

[0007] A frequency converter for offshore wind power includes a frequency converter body, a heat dissipation assembly, a mounting assembly, a rotating mechanism, and a moving assembly. This frequency converter is designed to meet the specific needs of the offshore wind power environment, particularly maintaining equipment stability and efficiency under strong winds and high wave conditions.

[0008] The frequency converter itself is the core component of the entire system, primarily used in offshore wind power applications. It converts the variable frequency current generated by the wind turbine into stable alternating current, which is then transmitted to land via the power grid. To ensure the frequency converter operates continuously and stably in harsh environments, the system is equipped with a heat dissipation component. This component, installed beneath the frequency converter, plays a crucial role in heat dissipation, preventing performance degradation or malfunction due to overheating. Offshore wind farms are characterized by variable environments, and the frequency converter may face insufficient heat dissipation during prolonged operation. Therefore, the design of the heat dissipation component is critical to ensure the equipment maintains optimal operating conditions despite wind speed fluctuations and temperature variations.

[0009] A mounting assembly is installed below the heat dissipation component. This assembly not only provides support and fixation but also drives the rotating mechanism via a wind-facing block. The uniquely designed wind-facing block automatically adjusts its angle according to changes in wind direction, effectively utilizing wind power to drive the rotating mechanism. The mounting assembly provides a stable platform for the rotating mechanism's operation, while also ensuring the overall structural integrity and reliability of the system.

[0010] The rotating mechanism is a crucial component of this frequency converter, housed within the mounting assembly. It consists of a first blade and a second blade, designed to allow wind power to drive the mechanism's rotation via the rotor blades. At higher wind speeds, the mechanism rotates rapidly, converting the wind's kinetic energy into mechanical energy. The different designs of the first and second blades enable the rotating mechanism to adjust flexibly to varying wind speeds, ensuring the system automatically adapts to external environmental conditions.

[0011] The movable component is mounted above the mounting component and is tightly connected to the rotating mechanism. The movable component slides along the rotating mechanism, thereby controlling the opening and closing of the vents within the heat dissipation component. When the wind speed is high, the movable component will close the vents, reducing the impact of strong winds on the frequency converter.

[0012] The heat dissipation assembly consists of a housing, heat dissipation fins, a sealing plate, and vents, designed to effectively improve the heat dissipation performance of the frequency converter. The housing is installed below the frequency converter body, providing protection and support to ensure the stability of the internal components. The heat dissipation fins are located inside the housing, increasing the surface area to promote rapid heat dissipation and ensuring the frequency converter maintains a suitable temperature during high-load operation. The sealing plate is installed on one side of the housing, providing dust and water protection, enhancing the sealing of the heat dissipation assembly, and preventing external contaminants from entering. The vents are located on the sealing plate, ensuring airflow and providing ample heat dissipation channels to further improve the heat dissipation effect, thereby ensuring the frequency converter can operate continuously and stably during operation.

[0013] The ventilation openings are designed with two circular structures, one larger in the center and one smaller on either side, all three interconnected. This design effectively balances airflow and heat dissipation. The larger central circular opening provides a wider airflow inlet, increasing air volume and improving heat dissipation efficiency. The smaller circular openings on either side control airflow distribution, preventing excessive concentration or uneven flow, thus ensuring stable and uniform airflow. Furthermore, the interconnected design of the three circular openings effectively reduces airflow resistance, allowing for smooth airflow and improving overall heat dissipation performance, ensuring the equipment maintains a low temperature even under high loads.

[0014] The mounting assembly consists of a mounting sleeve, a windward block, a mounting block, and a rotating hole, designed to provide stable installation and convenient adjustment. The mounting sleeve is fixed to the bottom of the housing, providing support and connection to ensure the stable installation of other components. The windward block is mounted on the side of the mounting sleeve, primarily used to guide airflow, enhance air circulation, and optimize heat dissipation. The mounting block is mounted on top of the mounting sleeve, ensuring the robustness and reliability of the assembly through its connection with other structures. The rotating hole, located inside the mounting sleeve, provides an adjustable rotation interface, allowing the assembly to be adjusted in angle or position as needed to adapt to different installation requirements. This overall design improves installation flexibility and stability, ensuring the long-term efficient operation of the system.

[0015] The mounting block has a rectangular groove on its top, primarily for accommodating other components or accessories and ensuring their secure fixation. The inner surface of the mounting block has a limiting groove to restrict the movement of connecting parts, preventing displacement or loosening. The limiting groove has a trapezoidal cross-sectional shape, which effectively enhances the stability of the sliding contact, allowing the connecting parts to move smoothly within the groove while preventing positional changes due to external forces, ensuring the accuracy and stability of the system. This design gives the mounting block high adaptability and reliability during use.

[0016] The rotating mechanism, consisting of a rotating shaft, a first blade, and a first mating pin, is designed to provide smooth rotation. The rotating shaft, mounted inside the mounting assembly, is the core component of the entire mechanism, responsible for supporting and driving the rotational motion. The first blade, mounted on the side of the rotating shaft, cuts through air or fluid during rotation, guiding or driving the rotation and improving system efficiency. The first mating pin, also mounted on the side of the rotating shaft, connects to other mating components, ensuring the stability and accuracy of the rotating shaft and preventing loosening or deviation. This rotating mechanism effectively integrates the rotating shaft, blade, and mating pin, achieving smooth and efficient rotational operation and meeting the system's requirements for power transmission and fluid guidance.

[0017] The rotating mechanism also includes a connecting ring, a second blade, and a second mating pin, further enhancing the stability and efficiency of the rotating system. The connecting ring is located on the side of the rotating shaft, connecting it to other components and ensuring a tight fit between them. The second blade is mounted on the side of the connecting ring and works in conjunction with the first blade during rotation, enhancing airflow and improving overall heat dissipation or drive performance. The second mating pin is mounted on top of the connecting ring, ensuring precise engagement with other related components, guaranteeing the stability and accuracy of the rotating parts, and preventing deviations or loosening. The overall design, through reasonable component fit, makes the rotating mechanism operate more smoothly and efficiently, improving the system's reliability and durability.

[0018] The rotating mechanism also includes rotating balls arranged in a circumferential array at the bottom of the rotating shaft. The rotating balls are used to reduce friction during the rotation of the rotating shaft.

[0019] The moving assembly comprises multiple precision components designed to provide smooth and flexible movement while ensuring coordinated operation between the parts. First, a moving block is installed inside the mounting assembly, providing support and guiding movement to ensure the entire assembly slides smoothly along a designated track. Limit blocks are positioned on the sides of the moving block to restrict its range of motion, preventing it from exceeding predetermined positions and ensuring the system's accuracy and safety during operation. A mating groove is located in the center of the moving block and is horizontally positioned; this design effectively guides and secures other related components, enhancing the system's stability and flexibility.

[0020] In addition, the moving component includes a fixed block, a fixed rod, and a control block, further improving the system's control and stability. The fixed block is installed at one end of the moving block to ensure its position is fixed and prevent displacement. The fixed rod is installed on top of the fixed block, connecting other structural components and providing additional support to enhance system stability. The control block is installed on top of the fixed rod and is typically used to control the movement of the entire moving component, allowing for adjustments to the component's movement as needed, such as achieving precise positioning, adjusting speed or direction, etc.

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

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

[0023] (1) This invention uses a rotating mechanism to detect wind speed, thereby driving the moving component to move. When the wind and waves are strong, the moving control block closes the ventilation opening to reduce the impact of strong winds and improve the stability of the frequency converter. Through wind speed detection and automatic ventilation opening control, the frequency converter can maintain stable operation under different wind speed conditions, avoiding equipment instability or failure due to changes in the external environment (such as strong winds or waves). It can automatically adjust the ventilation opening status according to changes in wind speed, avoiding the complexity of human intervention and adapting to different environmental conditions.

[0024] (2) By automatically responding to strong winds, the system can effectively prevent the direct impact of strong winds on equipment, reduce mechanical wear, vibration, overheating and other problems caused by excessive wind force, thereby reducing maintenance frequency and cost. In offshore wind farms, the waves and wind force fluctuate greatly. The technology of this invention can help the frequency converter to make adaptive adjustments under different wind speed conditions, preventing system instability caused by strong winds or surges. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

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

[0028] Figure 2This is a schematic diagram showing the installation positions of the frequency converter body and heat dissipation components of the present invention;

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

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

[0031] Figure 5 This is a schematic diagram of the installation component of the present invention;

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

[0033] Figure 7 This is a schematic diagram of the structure of the moving component of the present invention.

[0034] In the diagram: 1. Frequency converter body; 2. Heat dissipation assembly; 21. Outer shell; 22. Heat dissipation fins; 23. Sealing plate; 24. Ventilation opening; 3. Mounting assembly; 31. Mounting sleeve; 32. Air intake block; 33. Mounting block; 34. Limiting groove; 35. Rotating hole; 4. Rotating mechanism; 41. Rotating shaft; 42. First fan blade; 43. Connecting ring; 44. Second fan blade; 45. First mating pin; 46. Second mating pin; 47. Rotating ball; 5. Moving assembly; 51. Moving block; 52. Limiting block; 53. Mating groove; 54. Fixing block; 55. Fixing rod; 56. Control block. Detailed Implementation

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions 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 assembly 2, a mounting assembly 3, a rotating mechanism 4, and a moving assembly 5. This frequency converter is designed to meet the specific needs of the offshore wind power environment, particularly maintaining equipment stability and efficiency under strong winds and high wave conditions.

[0037] The frequency converter body 11 is the core component of the entire system, primarily applicable to power installations in offshore wind power. It converts the variable frequency current generated by the wind turbine into stable alternating current, which is then transmitted to land via the power grid. To ensure the frequency converter operates stably and continuously in harsh environments, the system is equipped with a heat dissipation component 2. Installed beneath the frequency converter body 11, the heat dissipation component 2 plays a crucial role in heat dissipation, preventing performance degradation or malfunction due to overheating. The environment of offshore wind farms is highly variable, and the frequency converter may face insufficient heat dissipation during prolonged operation. Therefore, the design of the heat dissipation component 2 is critical, ensuring that the equipment maintains optimal operating conditions under wind speed fluctuations and temperature variations.

[0038] Below the heat dissipation component 2 is a mounting component 3. The mounting component 3 not only provides support and fixation but also drives the rotating mechanism 4 to rotate via the wind-facing block 32. The wind-facing block 32 has a unique design that automatically adjusts its angle according to changes in wind direction, effectively utilizing wind power to drive the operation of the rotating mechanism 4. The mounting component 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 a crucial component of the frequency converter, installed inside the mounting assembly 3. The rotating mechanism 4 consists of a first blade 42 and a second blade 44. Their design allows wind power to drive the rotating mechanism 4 through the rotation of the wind turbine blades. At higher wind speeds, the rotating mechanism 4 rotates rapidly, converting the kinetic energy of the wind into mechanical energy. The different designs of the first blade 42 and the second blade 44 enable the rotating mechanism 4 to flexibly adjust to different wind speeds, ensuring the system automatically adapts to external environmental conditions.

[0040] The movable component 5 is mounted above the mounting component 3 and is tightly connected to the rotating mechanism 4. The function of the movable component 5 is to slide along the rotating mechanism 4, thereby controlling the opening and closing of the vent 24 inside the heat dissipation component 2. When the wind speed is high, the movable component 5 will close the vent 24 to reduce the impact of strong winds on the frequency converter.

[0041] like Figure 4As shown, the heat dissipation assembly 2 consists of a housing 21, heat dissipation fins 22, a sealing plate 23, and a vent 24, designed to effectively improve the heat dissipation performance of the frequency converter. The housing 21 is installed below the frequency converter body 11, providing protection and support to ensure the stability of the internal components. The heat dissipation fins 22 are located inside the housing 21, increasing the surface area to promote rapid heat dissipation and ensure the frequency converter maintains a suitable temperature during high-load operation. The sealing plate 23 is installed on one side of the housing 21, providing dust and water protection, enhancing the sealing of the heat dissipation assembly 2, and preventing external contaminants from entering the interior. The vent 24 is located on the sealing plate 23, ensuring airflow and providing ample heat dissipation channels to further improve the heat dissipation effect, thereby ensuring the frequency converter can operate continuously and stably during operation.

[0042] The vents 24 are configured as two circular structures, one larger in the middle and one smaller on either side, with all three circular vents interconnected. This design effectively balances airflow and heat dissipation. The larger central circular vent 24 provides a wider airflow inlet, increasing air volume and improving heat dissipation efficiency. The smaller circular vents 24 on either side control airflow distribution, preventing excessive concentration or uneven flow, thus ensuring stable and uniform airflow. Furthermore, the interconnected arrangement of the three circular vents 24 effectively reduces airflow resistance, allowing for smooth airflow and improving overall heat dissipation performance, ensuring the equipment maintains a low temperature even under high load operation.

[0043] like Figure 5 As shown, the mounting assembly 3 consists of a mounting sleeve 31, a windward block 32, a mounting block 33, and a rotating hole 35, designed to provide stable installation and convenient adjustment. The mounting sleeve 31 is fixed to the lower part of the housing 21, serving as support and connection to ensure the stable installation of other components. The windward block 32 is installed on the side of the mounting sleeve 31, primarily used to guide airflow, enhance air circulation, and optimize heat dissipation. The mounting block 33 is installed on top of the mounting sleeve 31, ensuring the robustness and reliability of the assembly through its connection with other structures. The rotating hole 35 is located inside the mounting sleeve 31, providing an adjustable rotation interface that allows the assembly to be adjusted in angle or position as needed to adapt to different installation requirements. The overall design improves installation flexibility and stability, ensuring the long-term efficient operation of the system.

[0044] The mounting block 33 has a rectangular groove on its top surface, primarily used to accommodate other components or accessories, ensuring they are securely fixed to the mounting block 33. The inner surface of the mounting block 33 has a limiting groove 34, used to restrict the movement of connecting components and prevent them from shifting or loosening. The limiting groove 34 has a trapezoidal cross-sectional shape, which effectively enhances the stability of the sliding contact, allowing the connecting components to move smoothly within the groove while preventing positional changes due to external forces, ensuring the accuracy and stability of the system. This design gives the mounting block 33 high adaptability and reliability during use.

[0045] like Figure 6 As shown, the rotating mechanism 4 consists of a rotating shaft 41, a first fan blade 42, and a first mating pin 45, designed to provide smooth rotation. The rotating shaft 41 is installed inside the mounting assembly 3, serving as the core component of the entire rotating mechanism 4, responsible for supporting and driving the rotational motion. The first fan blade 42 is mounted on the side of the rotating shaft 41, capable of cutting air or fluid during rotation, acting as a guide or driver to improve system efficiency. The first mating pin 45 is mounted on the side of the rotating shaft 41 for connection with other mating components, ensuring the stability and accuracy of the rotating shaft 41 and preventing loosening or deviation. This rotating mechanism 4 effectively integrates the rotating shaft 41, fan blade, and mating pin, achieving smooth and efficient rotational operation, meeting 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 mating pin 46, further enhancing the stability and efficiency of the rotating system. The connecting ring 43 is located on the side of the rotating shaft 41, connecting the rotating shaft 41 to other components and ensuring a tight fit between them. The second fan blade 44 is mounted on the side of the connecting ring 43 and works in conjunction with the first fan blade 42 during rotation, enhancing airflow and improving overall heat dissipation or driving performance. The second mating pin 46 is mounted on top of the connecting ring 43, ensuring precise engagement with other related components, guaranteeing the stability and accuracy of the rotating components, and preventing deviations or loosening. Through reasonable component fit, the overall design makes the rotating mechanism 4 operate more smoothly and efficiently, improving the system's reliability and durability.

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

[0048] like Figure 7As shown, the moving component 5 consists of multiple precision parts, designed to provide smooth and flexible movement and ensure coordinated operation between the components. First, the moving block 51 is installed inside the mounting component 3, serving to support and guide movement, ensuring the entire component can slide smoothly along the designated track. A limiting block 52 is located on the side of the moving block 51 to limit its range of motion, preventing it from exceeding the predetermined position and ensuring the accuracy and safety of the system during operation. A mating groove 53 is formed in the middle of the moving block 51 and is arranged laterally. This design effectively guides and secures other related components, enhancing the stability and flexibility of the system.

[0049] In addition, the moving component 5 also includes a fixed block 54, a fixed rod 55, and a control block 56, further improving the control and stability of the system. The fixed block 54 is installed at one end of the moving block 51 to ensure the moving block 51 is fixed in position and prevent positional deviation. The fixed rod 55 is installed on top of the fixed block 54, connecting other structural components and providing additional support to enhance system stability. The control block 56 is installed on top of the fixed rod 55 and is typically used to control the movement of the entire moving component 5, allowing for adjustment of the component's movement as needed, such as achieving precise positioning, adjusting movement speed or direction, etc.

[0050] Through this structural design, the moving component 5 achieves 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.

[0051] During operation, the installation component 3 is fixed to the power equipment of the offshore wind power, and the sea breeze enters the outer shell 21 through the vent 24 to dissipate heat from the heat dissipation fins 22.

[0052] When the sea breeze is strong, the windward block 32 introduces the sea breeze into the mounting sleeve 31. The sea breeze continuously pushes the first fan blade 42 and the second fan blade 44 backward. At this time, the rotating shaft 41 and the connecting ring 43 rotate at a certain angle. The first mating pin 45 and the second mating pin 46, which are fixed on it, will drive the moving block 51 to move in the mating groove 53, thereby pushing the control block 56 closer to the vent 24, thus reducing the air volume. When the sea breeze is even stronger, the control block 56 and the vent 24 coincide, and the vent is completely closed.

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

Claims

1. A frequency changer for offshore wind power, characterized in that Including frequency conversion machine body (1), heat dissipation assembly (2), installation assembly (3), rotating mechanism (4) and moving assembly (5); The frequency conversion machine body (1) is suitable for related power devices of offshore wind power, the heat dissipation assembly (2) is installed below the frequency conversion machine body (1); The installation assembly (3) is installed below the heat dissipation assembly (2), and the installation assembly (3) drives the rotating mechanism (4) to rotate through the wind block (32); The rotating mechanism (4) is installed in the installation assembly (3), and the rotating mechanism (4) is provided with a first fan blade (42) and a second fan blade (44), the first fan blade (42) and the second fan blade (44) are driven by wind to drive the rotating mechanism (4) to rotate; The moving assembly (5) is installed on the installation assembly (3), and the moving assembly (5) is driven by the rotating mechanism (4) to slide and control the air vent (24) in the heat dissipation assembly (2); The installation assembly (3) includes a mounting sleeve (31), a wind block (32), a mounting block (33) and a rotating hole (35); The mounting sleeve (31) is installed below the shell (21), the wind block (32) is installed on the side of the mounting sleeve (31), the mounting block (33) is installed on the upper surface of the mounting sleeve (31), and the rotating hole (35) is arranged in the mounting sleeve (31); The rotating mechanism (4) includes a rotating shaft (41), a first fan blade (42) and a first matching pin (45); The rotating shaft (41) is installed in the installation 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); The rotating mechanism (4) further includes 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 surface of the upper connecting ring (43); The moving assembly (5) includes a moving block (51), a limiting block (52) and a matching groove (53); The moving block (51) is installed in the installation assembly (3), the limiting block (52) is arranged on the side of the moving block (51), the matching groove (53) is arranged in the middle of the moving block (51), and the matching groove (53) is horizontally arranged; The moving assembly (5) further includes a fixed block (54), a fixed rod (55) and a control block (56); The fixed block (54) is installed on one end of the moving block (51), the fixed rod (55) is installed on the upper surface of the fixed block (54), and the control block (56) is installed on the upper surface of the fixed rod (55).

2. The frequency changer of claim 1, wherein: The heat dissipation assembly (2) includes a shell (21), a heat dissipation fin (22), a sealing plate (23) and an air vent (24) The shell (21) is installed below the frequency conversion machine body (1), the heat dissipation fins (22) are arranged inside the shell (21), the sealing plate (23) is installed on one side of the shell (21), and the air vent (24) is arranged on the sealing plate (23).

3. The frequency changer of claim 2, wherein: The air vent (24) is arranged in a three-circular structure with a large middle and small sides, and the three circles are communicated.

4. The frequency changer of claim 1, wherein: The upper surface of the mounting block (33) is provided with a rectangular groove, and the inner side surface of the mounting block (33) is provided with a limiting sliding groove (34), and the cross section shape of the limiting sliding groove (34) is arranged as a trapezoidal shape.

5. The frequency changer of claim 1, wherein: The rotating mechanism (4) further comprises a rotating ball (47), and the rotating ball (47) is arranged in a circumferential array at the lowermost end of the rotating shaft (41).

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