Protective system for the protection against corrosion and sand of a wind power plant

Abstract

This invention discloses a protective system, specifically a protective system for wind power generation equipment to resist corrosion and sandstorms, belonging to the technical field of wind power generation equipment protective accessory design and manufacturing. It provides a protective system for wind power generation equipment that effectively improves sand and dust protection. The protective system includes a tower, a head blade mechanism, and a nacelle. At least one generator set is integrated within the nacelle. The head blade mechanism is fixed to the power input shaft of the generator set extending from the nacelle end face. The nacelle is located at the top of the tower. The protective system also includes at least a composite sealing protection component, which seals the gap between the power input shaft and the nacelle.

Description

Technical Field

[0001] This invention relates to a protective system, and more particularly to a protective system for wind power generation equipment to resist corrosion and sand, belonging to the field of design and manufacturing technology of protective accessories for wind power generation equipment. Background Technology

[0002] Traditional wind turbine generator sets mainly include the following structures:

[0003] Tower: A vertical structure that supports the nacelle and blades, usually made of steel;

[0004] The nacelle is located at the top of the tower and integrates core components such as the generator and gearbox.

[0005] Wind turbine blade head fan blade mechanism: captures wind energy through rotation and drives a generator to generate electricity;

[0006] Foundation anchor piles: concrete or steel structures buried underground to secure the tower.

[0007] Corrosion prevention measures: Coating protection or cathodic protection technology is usually used to prevent the tower and foundation piles from being corroded by salt spray and moisture.

[0008] Sealing structure: The connection between the nacelle and the tower is made of a single-layer rubber sealing ring or a labyrinth seal to prevent sand and dust from entering.

[0009] Wind energy is converted into mechanical energy through the blades, driving a generator to produce electricity. The tower and foundation piles rely on periodic coating maintenance or sacrificial anode blocks for corrosion protection. The sealing structure relies on physical barriers and simple air pressure buffers, offering limited dust and sand protection capabilities.

[0010] Traditional wind turbine generators have the following problems during use:

[0011] 1. Traditional anti-corrosion coatings are susceptible to pitting corrosion caused by salt spray and sandstorms, leading to rust on the tower and foundation piles. Sacrificial anode blocks need to be replaced regularly, resulting in high maintenance costs.

[0012] 2. The single-layer sealing structure cannot effectively prevent sand and dust from entering. After long-term operation, the accumulation of sand and dust will cause bearing wear. In windy weather, changes in air pressure can easily cause the sealing ring to deform and fail.

[0013] 3. Frequent coating replacement and cleaning of the sealing structure are required, resulting in high maintenance costs;

[0014] 4. Dust cannot be automatically removed once it enters the sealed channel; manual intervention is required. Summary of the Invention

[0015] The technical problem to be solved by the present invention is to provide a protective system for wind power generation equipment that can effectively improve the protection against sand and dust.

[0016] The technical solution adopted to solve the above-mentioned technical problems is: a protective system for wind power generation equipment to resist corrosion and sand, including a tower, a head blade mechanism and a nacelle, wherein at least a generator set is integrated in the nacelle, the head blade mechanism is fixed on the power input shaft of the generator set extending out of the nacelle end face, the nacelle is arranged on the top of the tower, and the protective system also includes at least a composite sealing protective component, and the gap between the power input shaft and the nacelle is sealed by the composite sealing protective component.

[0017] Furthermore, the protection system also includes foundation piles and a sacrificial anode corrosion protection mechanism. The tower is arranged within a designated area of ​​the wind farm via foundation piles, and the sacrificial anode corrosion protection mechanism is arranged on the foundation piles. The salt spray and / or sandstorm impact damage suffered by the tower and foundation piles is mitigated or eliminated by the sacrificial anode corrosion protection mechanism.

[0018] The preferred embodiment of the above scheme is that the composite sealing protection assembly includes at least a fan shaft fixing protection seat and a fan shaft rotating seat. The fan shaft rotating seat is fixed on the head fan blade mechanism in a corresponding position to the power input shaft. The fan shaft fixing protection seat is fixed on the inner side of the end of the nacelle in a corresponding position to the power input shaft. The gap between the power input shaft and the nacelle is sealed by the sealing ends of the fan shaft fixing protection seat and the fan shaft rotating seat that are connected to each other to form a multi-stage sealing structure.

[0019] Furthermore, multiple rotating protrusions are arranged in succession on the fan shaft rotating seat, and multiple fixed protrusions are arranged in succession on the side of the fan shaft fixed protective seat facing the head fan blade mechanism. The fan shaft fixed protective seat and the fan shaft rotating seat are connected by the interlocking of the fixed protrusions and the rotating protrusions to form a multi-stage sealing structure with a serpentine channel.

[0020] The preferred embodiment of the above scheme is that the composite sealing protection assembly further includes an outer sealing baffle and an inner sealing baffle. The elastic outer sealing baffle is inclinedly disposed on the outermost rotating protrusion, and the output end of the serpentine channel is sealed by the outer sealing baffle. There are multiple inner sealing baffles, and an inner sealing baffle is inclinedly disposed on the outer wall of each rotating protrusion. The serpentine channel is formed by rotating protrusions, fixed protrusions and inner sealing baffles at corresponding positions.

[0021] Furthermore, the composite sealing and protection assembly also includes a high-pressure sealing and dustproof device. The high-pressure gas output end of the high-pressure sealing and dustproof device is connected to the serpentine channel from one side inside the cabin. Sand and dust entering the serpentine channel from the outside are swept away or restricted from moving into the cabin by high-pressure gas.

[0022] The preferred embodiment of the above scheme is that the composite sealing and protection assembly further includes a protective housing, the high-pressure sealing and dustproof device includes a drive mechanism and an air compression mechanism, the fan shaft fixing and protection seat is arranged inside the protective housing, the protective housing is arranged on the end wall of the nacelle where the power input shaft is located, and the high-pressure gas output end of the air compression mechanism is connected to the serpentine channel from one side of the nacelle through the protective housing; during the process of blowing away or restricting the movement of sand and dust into the nacelle, the high-pressure gas used for blowing is prepared by the air compression mechanism in cooperation with the driving force input by the drive mechanism.

[0023] Furthermore, the high-pressure sealing dustproof device also includes a set of meshing conical transmission bevel gears. The drive mechanism includes a set of wind-driven fan blades, a rotating shaft, and a partition. The wind-driven fan blades are arranged at the end of the rotating shaft that extends out of the tower. The rotating shaft is movably arranged on the lower wall of the tower through the partition. One conical transmission bevel gear of the conical transmission bevel gear set is fixed in the middle of the rotating shaft at one end inside the tower. The other conical transmission bevel gear of the conical transmission bevel gear set is fixed on the power input end of the air compression mechanism.

[0024] The preferred embodiment of the above scheme is that the air compression mechanism includes a high-pressure gas tank, a piston cylinder, a movable piston, a drive screw, an air delivery pipe, an air inlet pipe, and an air supply pipe. Another conical transmission bevel gear is fixed on the end of the drive screw located outside the piston cylinder. The movable piston is screwed onto the drive screw inside the piston cylinder. An air delivery pipe connected to the high-pressure gas tank and an air inlet pipe connected to the outside are respectively provided at the upper and lower ends of the piston cylinder. The gas output end of the air supply pipe is connected to the serpentine channel through a protective cover, and the gas input end of the air supply pipe is connected to the high-pressure gas tank. The air compression mechanism is arranged at the bottom of the tower cylinder in a manner that adapts to the positions of the high-pressure gas tank and the drive mechanism.

[0025] Furthermore, the air compression mechanism also includes an intake filter box, and the intake end of the intake pipe is connected to the outside through the intake filter box; the composite sealing protection component also includes a self-cleaning component, which includes an electromagnetic adsorption control component, an electromagnetic adsorption rod, and magnetic suction components. Each fixed protrusion is provided with an electromagnetic adsorption rod extending along its length, and each inner sealing baffle is provided with a set of magnetic suction components extending circumferentially. The inner sealing baffles, which are arranged outwardly at an angle, scrape off the sand and dust on the corresponding wall surface of the fixed protrusion during the process of changing the tilt angle outward with the electromagnetic adsorption control component.

[0026] The beneficial effects of this invention are as follows: The technical solution provided in this application is based on the existing tower, head blade mechanism, and nacelle of wind power generation equipment. It combines the structural characteristics of at least one generator set integrated within the nacelle, the head blade mechanism fixed to the power input shaft extending from the nacelle end face of the generator set, and the nacelle located at the top of the tower. To adapt to the windy and dusty operating environment of wind power stations, this application constructs a protective system by adding a composite sealing protection component, sealing the gap between the power input shaft and the nacelle. This changes the situation in the prior art where the use of single-layer rubber sealing rings or labyrinth-type sealing rings for sand and dust protection results in poor sealing performance and cannot effectively prevent sand and dust from entering the nacelle through the gap between the power input shaft and the nacelle. The composite sealing protection component of this application, due to its composite sealing structure, not only seals the gap between the power input shaft and the nacelle but also back-blown sand and dust entering the composite sealing protection component outwards to the nacelle and the composite sealing protection component, effectively improving the sand and dust protection effect. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the wind power generation equipment involved in the anti-corrosion and sand-proof protection system for wind power generation equipment of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of the high-pressure sealing dustproof device arranged at the bottom of the tower, which is part of the protective system for corrosion and sand prevention of wind power generation equipment according to the present invention.

[0029] Figure 3 for Figure 2 A three-dimensional structural diagram from another direction;

[0030] Figure 4 This is a three-dimensional structural diagram of the wind turbine shaft fixing and rotating seats arranged in the gap between the power input shaft and the nacelle, which are part of the protective system for corrosion and sand prevention of wind power generation equipment according to the present invention.

[0031] Figure 5 for Figure 4 Enlarged view of part A;

[0032] Figure 6 The present invention relates to a protective system for wind power generation equipment against corrosion and sand, which includes a wind turbine shaft fixing and rotating seat arranged in the gap between the power input shaft and the nacelle. The enlarged detailed view shows the system in a disassembled state.

[0033] Figure 7 This is a schematic diagram of the structure of a self-cleaning component installed on a wind turbine shaft fixed protective seat and a wind turbine shaft rotating seat, which is part of an invention for a protective system for corrosion and sand prevention of wind power generation equipment.

[0034] The components in the diagram are labeled as follows: 1. Tower; 2. Head fan blade mechanism; 3. Nacelle; 4. Power input shaft; 5. Foundation pile; 6. Sacrificial anode anti-corrosion protection mechanism; 7. Rotating cam; 8. Fixed cam; 9. Outer sealing baffle; 10. Inner sealing baffle; 11. Protective cover; 12. Wind-driven fan blade; 13. Rotating shaft; 14. Baffle; 15. Conical transmission bevel gear; 16. High-pressure gas storage tank; 17. Piston cylinder; 18. Moving piston; 19. Drive screw; 20. Gas delivery pipe; 21. Air inlet pipe; 22. Gas supply pipe; 23. Electromagnetic adsorption control component; 24. Electromagnetic adsorption rod; 25. Magnetic suction component; 26. Air inlet filter box. Detailed Implementation

[0035] like Figures 1 to 7 This invention illustrates a protective system for wind power generation equipment that effectively improves dust and sand protection. The system includes a tower 1, a head blade mechanism 2, and a nacelle 3. At least one generator set is integrated within the nacelle 3. The head blade mechanism 2 is fixed to the power input shaft 4 extending from the nacelle end face of the generator set. The nacelle 3 is located at the top of the tower 1. The system also includes a composite sealing protection component, which seals the gap between the power input shaft 4 and the nacelle 3. This application's technical solution is based on existing wind power generation equipment structures such as towers, head blade mechanisms, and nacelles. It incorporates the structural characteristics of integrating at least one generator set within the nacelle, fixing the head blade mechanism to the power input shaft extending from the nacelle end face, and locating the nacelle at the top of the tower. To adapt to the harsh wind and sand conditions of wind farms, this application adds a composite sealing protection component to construct the protective system, sealing the gap between the power input shaft and the nacelle. This addresses the shortcomings of existing technologies that rely on single-layer rubber seals or labyrinth seals for dust protection, which often result in inadequate sealing and an inability to effectively prevent dust from entering the nacelle through the gap between the power input shaft and the nacelle. The composite sealing protection component of this application, due to its complex sealing structure, not only seals the gap between the power input shaft and the nacelle but also backflushs dust that enters the component, expelling it from the nacelle and the component itself, thus significantly improving dust protection. Furthermore, to address the technical problems of salt spray and moisture corrosion, the protection system described in this application also includes foundation piles 5 and a sacrificial anode corrosion protection mechanism 6. The tower 1 is positioned within a designated area of ​​the wind farm via the foundation piles 5, and the sacrificial anode corrosion protection mechanism 6 is mounted on the foundation piles 5. The sacrificial anode corrosion protection mechanism 6 mitigates or eliminates the impact of salt spray and / or dust on the tower 1 and foundation piles 5.

[0036] Accordingly, as a key component of this application's improvement, in order to maximize the protective sealing effect while adapting as much as possible to the working conditions of relative rotation between the head fan blade mechanism and the nacelle, the composite sealing protection assembly of this application includes at least a fan shaft fixed protection seat and a fan shaft rotating seat. The fan shaft rotating seat is fixed to the head fan blade mechanism 2 at a corresponding position to the power input shaft 4, and the fan shaft fixed protection seat is fixed to the inner side of the end of the nacelle at a corresponding position to the power input shaft 4. The gap between the power input shaft 4 and the nacelle 3 is sealed by the sealing ends of the fan shaft fixed protection seat and the fan shaft rotating seat, which are mutually connected, forming a multi-stage sealing structure. In order to form an effective multi-stage sealing structure, this application provides multiple rotating protrusions 7 arranged in stages on the fan shaft rotating seat, and multiple fixed protrusions 8 arranged in stages on the side of the fan shaft fixed protection seat facing the head fan blade mechanism 2. The fan shaft fixed protection seat and the fan shaft rotating seat are connected by the fixed protrusions 8 and the rotating protrusions 7 in an interlocking manner to form a multi-stage sealing structure with a serpentine channel. The composite sealing and protection assembly of this application also includes an outer sealing baffle 9 and an inner sealing baffle 10. The elastic outer sealing baffle 9 is inclinedly disposed on the outermost rotating protrusion 7, and the output end of the serpentine channel is sealed by the outer sealing baffle 9. There are multiple inner sealing baffles 10, and an inner sealing baffle 10 is inclinedly disposed on the outer wall of each rotating protrusion 7. The serpentine channel is formed by the rotating protrusion 7, the fixed protrusion 8 and the inner sealing baffle 10 at corresponding positions. The sealing structure of the serpentine channel can effectively extend the path length of sand and dust entering the cabin, achieving the purpose of effective sealing and protection.

[0037] Furthermore, considering the wind power station's typically windy and dusty working environment, in order to minimize the amount of dust entering the serpentine channel, and to ensure that even if some dust does enter the serpentine channel, it can be blown out of the nacelle, the composite sealing protection component of this application also includes a high-pressure sealing dustproof device. The high-pressure gas output end of the high-pressure sealing dustproof device is connected to the serpentine channel from one side inside the nacelle 3. Dust entering the serpentine channel from the outside is swept away or restricted from moving into the nacelle 3 by high-pressure gas. To facilitate installation and improve the backflushing effect, the composite sealing and protection assembly of this application also includes a protective housing 11. The high-pressure sealing and dustproof device includes a drive mechanism and an air compression mechanism. The fan shaft fixing and protective seat is arranged inside the protective housing 11. The protective housing 11 is arranged on the end wall of the nacelle 3, which is provided with one end of the power input shaft 4. The high-pressure gas output end of the air compression mechanism is connected to the serpentine channel from one side inside the nacelle 3 through the protective housing 11. During the process of blowing away or restricting the movement of sand and dust into the nacelle 3, the high-pressure gas used for blowing is prepared by the air compression mechanism in cooperation with the driving force input by the drive mechanism. More specifically, the high-pressure sealing dustproof device of this application also includes a set of meshing conical transmission bevel gears. The drive mechanism includes a set of wind-driven fan blades 12, a rotating shaft 13, and a partition 14. The wind-driven fan blades 12 are arranged at the end of the rotating shaft 13 extending out of the tower 1. The rotating shaft 13 is movably arranged on the lower wall of the tower through the partition 14. One conical transmission bevel gear 15 of the conical transmission bevel gear set is fixedly installed in the middle of one end of the rotating shaft 13 inside the tower 1. The other conical transmission bevel gear 15 of the conical transmission bevel gear set is fixedly installed on the power input end of the air compression mechanism. The air compression mechanism includes a high-pressure gas storage tank 16, a piston cylinder 17, and a movable piston cylinder. The piston 18, drive screw 19, air supply pipe 20, air inlet pipe 21 and air supply pipe 22 are provided. Another conical transmission bevel gear 15 is fixed on the end of the drive screw 19 located outside the piston cylinder 17. The moving piston 18 is screwed onto the drive screw 19 inside the piston cylinder 17. At the upper and lower ends of the piston cylinder 17, there are air supply pipes 20 connected to the high-pressure gas storage tank 16 and air inlet pipes 21 connected to the outside. The gas output end of the air supply pipe 22 is connected to the serpentine channel through the protective cover 11. The gas input end of the air supply pipe 22 is connected to the high-pressure gas storage tank 16. The air compression mechanism is arranged at the bottom of the tower 1 in a manner that is adapted to the position of the drive mechanism through the high-pressure gas storage tank 16.

[0038] Finally, after long-term operation of the equipment, when some sand and dust enter the snake channel, in order to realize the self-cleaning function of the sealing structure, extend the manual cleaning interval of the protection system of this application, and extend the service life of the multi-stage sealing structure, the air compression mechanism of this application also includes an air intake filter box 26. The air intake end of the air intake pipe 21 is connected to the outside through the air intake filter box 26. The composite sealing protection component also includes a self-cleaning component, which includes an electromagnetic adsorption control component 23, an electromagnetic adsorption rod 24, and a magnetic suction component 25. An electromagnetic adsorption rod 24 extending along the length direction is respectively set on each fixed protrusion 8, and a set of magnetic suction components 25 extending along the circumference is respectively set on each inner sealing baffle 10. The inner sealing baffles 10 arranged outwardly are scraped to remove the sand and dust on the wall surface of the corresponding position on the fixed protrusion 8 by changing the tilt angle of each electromagnetic adsorption rod 24 in cooperation with the electromagnetic adsorption control component 23.

[0039] In summary, the technical solution provided in this application also has the following advantages:

[0040] This invention significantly enhances the dust and sand protection capabilities of equipment through the synergistic effect of a multi-stage sealing structure and a positive pressure gas protection mechanism. Specifically, the dynamic sealing component between the head fan blade mechanism and the wind turbine generator mechanism employs staggered rotating and fixed protrusions to form a complex, serpentine gas channel, greatly extending the path of sand and dust intrusion. Combined with the multiple barriers of the elastic outer sealing baffle and the inclined inner sealing baffle, the pressure difference enhances the sealing performance in windy weather, effectively reducing the probability of sand and dust entering the mechanical moving parts of the rotating shaft. Simultaneously, the auxiliary fan blade mechanism utilizes wind energy to drive a reciprocating screw shaft, converting mechanical energy into high-pressure gas, which is stored in a container. After purification by a filtration device, positive pressure gas is continuously supplied to the protective housing, forming a gas phase barrier that maintains the stability of the sealing system even during sudden changes in external air pressure.

[0041] More importantly, the electromagnetic adsorption component works in conjunction with the magnetic attraction of the inner sealing baffle. By periodically adsorbing the fixed end of the baffle and using air pressure to push the baffle to scrape the inner wall of the channel, it can actively remove the attached dust, achieve a self-cleaning function, and avoid wear and jamming problems caused by dust accumulation.

[0042] The tower and foundation piles are protected by a dual system of sacrificial anode corrosion protection and high-pressure gas corrosion protection, which significantly reduces the corrosion rate of the metal structure from salt spray and potentially humid environments.

[0043] Example 1

[0044] The technical problem to be solved is that existing technologies have significant defects in terms of salt spray corrosion, sand and dust intrusion, sealing durability and ease of maintenance, resulting in high equipment maintenance costs and low reliability.

[0045] The purpose of this invention is to achieve self-powered positive pressure sealing and dust prevention through an auxiliary fan blade mechanism and a high-pressure air supply system; to improve dust and sand prevention capabilities by adopting a multi-stage sealing structure and an electromagnetic adsorption self-cleaning mechanism; and to extend the service life of the tower and foundation piles by utilizing sacrificial anode corrosion protection technology.

[0046] The ultimate goal of this application is to significantly extend the equipment maintenance cycle and reduce the total life cycle cost.

[0047] The technical solution adopted in this application includes a tower, a wind turbine generator at the top of the tower, and a head fan blade mechanism at the front of the wind turbine generator, thus forming a basic wind turbine generator. This technical solution innovatively includes an auxiliary fan blade mechanism located at the bottom of the tower, used to convert wind power into the additional power required by this protective device. To prevent corrosion of the tower / underground fixed piles by salt and small amounts of moisture in the air, this device also includes a sacrificial anode corrosion protection mechanism. The sacrificial anode is connected to the tower / underground fixed piles, thus protecting the tower structure 10 from corrosion.

[0048] The main technical features of this device are the positive pressure gas protection mechanism and the multi-stage sealing structure. First, the multi-stage sealing mechanism will be described. It includes a fan shaft rotating seat fixed to the head fan blade mechanism and a fan shaft fixing and protective seat fixed to the fan generator mechanism. The protective cover is located inside the end of the fan generator mechanism, and the fan shaft fixing and protective seat is fixedly located inside the protective cover. Multiple progressively nested fixing protrusions are arranged on the side of the fan shaft fixing and protective seat facing the head fan blade mechanism. To form a corresponding interlocking multi-stage sealing mechanism with the fan shaft fixing and protective seat, multiple progressively nested rotating protrusions are arranged on the fan shaft rotating seat on the head fan blade mechanism. These rotating protrusions are all located outside the power input shaft, which is fixedly mounted to the head fan blade mechanism and rotates together with the head fan blades. The rotating protrusions and the fixing protrusions interact with each other. The staggered arrangement creates a multi-stage, reversible gas flow channel when the two parts are engaged, thus extending the path for dust entry. The intricate reversal in the middle effectively prevents dust and impurities from entering the mechanical moving parts of the rotating shaft during windy weather. To further enhance sand and dust protection, an elastic outer sealing baffle is installed on the outermost rotating protrusion, which, by default, seals the opening of the serpentine gas flow channel. The device also features multiple inner sealing baffles, which are located on the outer wall of the inner rotating protrusion. The outer ends of the inner sealing baffles abut against the wall of the protrusion, thus forming a multi-stage sealing mechanism. Both the outer and inner sealing baffles are inclined, designed according to their shape, and always have a deformation-resetting tendency perpendicular to the power input shaft direction, thereby achieving the default abutment force at both ends of the inner sealing baffle.

[0049] During the above process, the gas first enters the aforementioned serpentine channel from the gas supply channel. The entire serpentine channel is under positive pressure. Under default conditions, a good sealing effect can be achieved through the long path and the sealing plate mechanism. When strong winds or electric shocks occur, the seal needs to be strengthened. Under the positive pressure of the gas entering the serpentine channel, the gas continuously flows outward, and all the sealing baffles rotate slightly and open to achieve an enhanced sealing effect.

[0050] Next, we will explain the source of the sealing gas. This device is equipped with an auxiliary fan head. When there is a strong wind, the lower auxiliary fan head will rotate, which will drive the fan head shaft to rotate. At the bottom of the tower, there is a high-pressure gas supply container and a piston cylinder. Inside the piston cylinder, there is a reciprocating screw shaft. The shaft of the auxiliary fan head can transmit kinetic energy to the reciprocating screw shaft through a set of bevel gears. A movable piston is installed on the outer wall of the reciprocating screw shaft. The movable piston can achieve reciprocating motion inside the piston cylinder through the screw nut. Even if the fan blade rotates in the same direction, it can still drive the movable piston to move back and forth. When the piston moves upward, air enters through the lower right inlet pipe and exits through the upper left outlet pipe into the high-pressure gas supply container. When the piston moves downward, air enters through the upper right inlet pipe and exits through the lower left outlet pipe into the high-pressure gas supply container. Each outlet pipe and inlet pipe is equipped with a one-way valve, thus achieving a continuous supply of gas. The gas is supplied to a high-pressure gas supply container, ensuring a constant positive pressure. The container is equipped with a pressure relief valve connected to a gas supply pipe, which in turn connects to the protective housing. The gas then enters through a gas supply channel, ultimately achieving a positive pressure sealing and dustproof mechanism. To ensure the cleanliness of the gas required for sealing, an inlet filter box is installed on the tower. This box contains periodically replaced filter material, and its output is connected to two inlet pipes. To ensure dustproof sealing of the auxiliary fan blade head's shaft, a protective sleeve is installed on the outside of the shaft, and a partition plate is fitted onto the shaft inside the tower. This partition plate isolates an independent positive pressure space, which can also be connected to the gas supply pipe, thus achieving a positive pressure gas sealing mechanism. Similarly, an external sealing baffle can be fixed to the open end of the protective sleeve.

[0051] The above technical solution currently achieves a sealing and sand / dust-proof mechanism with an ultra-long maintenance cycle. However, the sealing mechanism lacks self-cleaning properties and cannot guarantee 100% that sand and dust will not enter the serpentine channel. Therefore, the technical solution described in this section is a method with a self-cleaning mechanism, including setting multiple electromagnetic adsorption rods within the fixed protrusions, and then setting an electromagnetic adsorption component within the protective cover to control when the electromagnetic adsorption rods open to generate magnetic attraction. Correspondingly, a magnetic attraction component capable of being electromagnetically attracted is modified on the inner sealing baffle. It should be noted that the magnetic attraction component is set on the side of the inner sealing baffle that can be opened (because the inner sealing baffle is tilted, one side cannot be opened, while the other side is relatively easy to open, such as...). Figure 7 As shown, the inner sealing baffle, marked with its position, cannot be folded outwards at the bottom; only the top can be folded open under the action of airflow. When the device has been running for one week, the electromagnetic adsorption component can be activated. At this time, the airflow is still flowing, but the opening section of the inner sealing baffle is held in place by the adsorption and cannot be opened. As the air pressure increases, it will push the entire inner sealing baffle in the direction of airflow. During this movement, the dust adhering to the inner wall of the camera channel is scraped off. Then, the electromagnetic adsorption component closes, and the opening end of the inner sealing baffle can open. The airflow blows out the dust it has scraped off. Then, under its own elastic return tendency, the inner sealing baffle moves to the side with the larger path width, achieving reset, waiting for the next scraping action. (The tilted protrusion is set to an tilted state, therefore the width varies at different channel positions, such as...) Figure 7 (As shown).

[0052] Compared with existing technologies, the main improvements and innovative structures of the technical solution in this application are as follows:

[0053] 1. Auxiliary fan blade mechanism and high-pressure air supply system:

[0054] An auxiliary fan blade is installed at the bottom of the tower, using wind energy to drive a reciprocating screw shaft, converting mechanical energy into high-pressure gas stored in a container, providing continuous positive pressure gas for the sealing system.

[0055] It includes a filtration device (inlet filter box) and a two-way intake pipeline to ensure clean gas and stable pressure.

[0056] 2. Multi-stage sealing structure:

[0057] Dynamic sealing assembly: The fan shaft rotating seat (head blade side) and the fixed protective seat (nacelle side) form an interlaced gas channel through staggered rotating and fixed protrusions.

[0058] 3. Elastic sealing baffle:

[0059] The outer sealing baffle (closed by default) and the inner sealing baffle (tilted reset) work together to enhance the sealing performance through air pressure difference.

[0060] 4. Electromagnetic adsorption self-cleaning mechanism:

[0061] An electromagnetic adsorption rod is embedded in the fixed protrusion, which works in conjunction with the magnetic attraction component on the inner sealing baffle.

[0062] The baffle is fixed by periodic electromagnetic adsorption, and air pressure is used to push the baffle to scrape the inner wall of the channel to remove the accumulated dust before resetting.

[0063] 5. Anti-corrosion system:

[0064] Sacrificial anodes connect the tower / foundation piles, protecting the metal structure through electrochemical corrosion prevention.

Claims

1. A protective system for wind power generation equipment against corrosion and sand, comprising a tower (1), a head blade mechanism (2), and a nacelle (3), wherein at least one generator set is integrated within the nacelle (3), the head blade mechanism (2) is fixedly mounted on the power input shaft (4) extending from the end face of the generator set, and the nacelle (3) is arranged on the top of the tower (1), characterized in that: The protection system also includes at least a composite sealing protection component, which seals the gap between the power input shaft (4) and the engine compartment (3). The composite sealing protection assembly includes at least a fan shaft fixed protection seat and a fan shaft rotating seat. The fan shaft rotating seat is fixed on the head fan blade mechanism (2) in a position adapted to the power input shaft (4). The fan shaft fixed protection seat is fixed on the inner side of the end of the nacelle in a position adapted to the power input shaft (4). The gap between the power input shaft (4) and the nacelle (3) is sealed by the sealing ends of the fan shaft fixed protection seat and the fan shaft rotating seat, which are connected to each other, forming a multi-stage sealing structure. Multiple rotating protrusions (7) are arranged in succession on the rotating seat of the fan shaft, and multiple fixed protrusions (8) are arranged in succession on the side of the fan shaft fixed protective seat facing the head fan blade mechanism (2). The fan shaft fixed protective seat and the fan shaft rotating seat are connected by the fixed protrusions (8) and the rotating protrusions (7) to form a multi-stage sealing structure with a serpentine channel. The composite sealing protection assembly also includes an outer sealing baffle (9) and an inner sealing baffle (10). The elastic outer sealing baffle (9) is inclinedly arranged on the outermost rotating protrusion (7), and the output end of the serpentine channel is sealed by the outer sealing baffle (9). There are multiple inner sealing baffles (10), and an inner sealing baffle (10) is inclinedly arranged on the outer wall of each rotating protrusion (7). The serpentine channel is formed by the rotating protrusions (7), fixed protrusions (8) and inner sealing baffles (10) at corresponding positions. The composite sealing and protection assembly also includes a high-pressure sealing and dustproof device. The high-pressure gas output end of the high-pressure sealing and dustproof device is connected to the serpentine channel from one side inside the cabin (3). Sand and dust entering the serpentine channel from the outside are swept away or restricted from moving into the cabin (3) by high-pressure gas. The composite sealing protection assembly also includes a protective cover (11). The high-pressure sealing dustproof device includes a drive mechanism and an air compression mechanism. The fan shaft fixing protection seat is arranged inside the protective cover (11). The protective cover (11) is arranged on the end wall of the nacelle (3) with one end of the power input shaft (4). The high-pressure gas output end of the air compression mechanism is connected to the serpentine channel from one side of the nacelle (3) through the protective cover (11). During the process of blowing away or restricting the movement of sand and dust into the nacelle (3), the high-pressure gas used for blowing is prepared by the air compression mechanism in cooperation with the driving force input by the drive mechanism.

2. The protection system for corrosion and sand protection of wind power plants according to claim 1, characterized in that: The protection system also includes foundation piles (5) and sacrificial anode corrosion protection mechanism (6). The tower (1) is arranged in the designated area of ​​the wind farm through the foundation piles (5). The sacrificial anode corrosion protection mechanism (6) is arranged on the foundation piles (5). The salt spray and / or sandstorm impact damage suffered by the tower (1) and the foundation piles (5) is mitigated or eliminated by the sacrificial anode corrosion protection mechanism (6).

3. The protective system for corrosion and sand prevention of wind power generation equipment according to claim 1 or 2, characterized in that: The high-pressure sealing dustproof device also includes a set of meshing conical transmission bevel gears. The drive mechanism includes a set of wind-driven fan blades (12), a rotating shaft (13) and a partition (14). The wind-driven fan blades (12) are arranged at the end of the rotating shaft (13) that extends out of the tower (1). The rotating shaft (13) is movably arranged on the lower wall of the tower through the partition (14). One conical transmission bevel gear (15) of the conical transmission bevel gear set is fixed in the middle of one end of the rotating shaft (13) inside the tower (1). The other conical transmission bevel gear (15) of the conical transmission bevel gear set is fixed on the power input end of the air compression mechanism.

4. The protection system for corrosion and sand protection of wind power plants according to claim 3, characterized in that: The air compression mechanism includes a high-pressure gas tank (16), a piston cylinder (17), a moving piston (18), a drive screw (19), an air delivery pipe (20), an air inlet pipe (21), and an air supply pipe (22). Another conical transmission bevel gear (15) is fixed on one end of the drive screw (19) located outside the piston cylinder (17). The moving piston (18) is screwed onto the drive screw (19) inside the piston cylinder (17). At the upper and lower ends of the piston cylinder (17), there are air delivery pipes (20) connected to the high-pressure gas tank (16) and air inlet pipes (21) connected to the outside. The gas output end of the air supply pipe (22) is connected to the serpentine channel through the protective cover (11). The gas input end of the air supply pipe (22) is connected to the high-pressure gas tank (16). The air compression mechanism is arranged at the bottom of the tower (1) in a manner that adapts to the position of the high-pressure gas tank (16) and the drive mechanism.

5. The protection system for corrosion and sand protection of wind power plants according to claim 4, characterized in that: The air compression mechanism also includes an air intake filter box (26), and the air intake end of the air intake pipe (21) is connected to the outside through the air intake filter box (26); the composite sealing protection component also includes a self-cleaning component, which includes an electromagnetic adsorption control component (23), an electromagnetic adsorption rod (24) and a magnetic suction component (25). An electromagnetic adsorption rod (24) extending along the length direction is provided on each fixed protrusion (8), and a set of magnetic suction components (25) extending along the circumference is provided on each inner sealing baffle (10). The inner sealing baffles (10) arranged outwardly are scraped off the sand and dust on the wall surface of the corresponding position on the fixed protrusion (8) by changing the tilt angle outward through the electromagnetic adsorption rod (24) in cooperation with the electromagnetic adsorption control component (23).

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