Protection system for corrosion resistance and sand prevention of wind power generation equipment

Abstract

The invention discloses a protection system, particularly discloses a protection system for corrosion resistance and sand prevention of wind power generation equipment, and belongs to the technical field of design and manufacturing of protection accessories of the wind power generation equipment. The protection system for corrosion resistance and sand prevention of the wind power generation equipment can effectively improve the sand and dust prevention effect. The protection system comprises a tower drum, a head fan blade mechanism and a cabin, at least one generator set is integrated in the cabin, the head fan blade mechanism is fixedly installed on a power input shaft, extending out of the end face of the cabin, of the generator set, the cabin is arranged at the top of the tower drum, and the protection system at least further comprises a composite sealing protection assembly. A gap between the power input shaft and the cabin is sealed through a composite sealing protection assembly.

Description

Technical Field

[0001] The present invention relates to a protection system, in particular to a protection system for wind power generation equipment to resist corrosion and sand, and belongs to the technical field of design and manufacturing of protective accessories for wind power generation equipment. Background Art

[0002] Traditional wind turbines mainly include the following structures: Tower: A vertical structure that supports the nacelle and blades, usually made of steel; Nacelle: Located at the top of the tower, it integrates core components such as the generator and gearbox; The fan blade mechanism at the head of the wind turbine blade: captures wind energy through rotation and drives the generator to generate electricity; Foundation fixing piles: concrete or steel structures buried underground to fix the tower; Anti-corrosion 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; Sealing structure: A single-layer rubber sealing ring or labyrinth seal is used at the connection between the cabin and the tower to prevent sand and dust from entering.

[0003] Wind energy is converted into mechanical energy by the blades, driving the generator to generate electricity. The tower and foundation piles rely on regular coating maintenance or sacrificial anode blocks for corrosion protection. The sealed structure relies on physical barriers and simple air pressure buffering, which has limited dust and sand control capabilities.

[0004] Traditional wind turbines have the following problems during use: 1. Traditional anti-corrosion coatings are susceptible to pitting caused by salt spray and dust impact, leading to rust of towers and foundation piles. Sacrificial anode blocks need to be replaced regularly, resulting in high maintenance costs. 2. The single-layer sealing structure cannot effectively prevent the intrusion of sand and dust. After long-term operation, the accumulation of sand and dust will cause bearing wear. The change of air pressure in windy weather will easily cause the sealing ring to deform and fail. 3. The coating needs to be replaced frequently and the sealing structure needs to be cleaned, resulting in high maintenance costs; 4. Once sand and dust enter the sealed channel, they cannot be cleared automatically and require manual intervention. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a corrosion-resistant and sand-proof protection system for wind power generation equipment, which can effectively improve the anti-sand and dust effect.

[0006] The technical solution adopted to solve the above technical problems is: a protective system for wind power generation equipment to prevent corrosion and sand, including a tower, a head fan blade mechanism and a nacelle, at least a generator set is integrated in the nacelle, the head fan blade mechanism is fixedly mounted on the power input shaft of the generator set extending out of the end face of the nacelle, the nacelle is arranged at the top of the tower, and the protective system also includes at least a composite sealing protection component, and the gap between the power input shaft and the nacelle is sealed by the composite sealing protection component.

[0007] Furthermore, the protection system also includes foundation piles and sacrificial anode anti-corrosion protection mechanisms. The tower is arranged in a specified area of the wind farm through the foundation piles, and the sacrificial anode anti-corrosion protection mechanism is arranged on the foundation piles. The salt spray and / or dust impact damage suffered by the tower and foundation piles is reduced or eliminated by the sacrificial anode anti-corrosion protection mechanism.

[0008] The preferred embodiment of the above scheme is that 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 appropriately fixed on the head fan blade mechanism in accordance with the position of the power input shaft, the fan shaft fixed protection seat is appropriately fixed on the inner side of the end of the cabin in accordance with the position of the power input shaft, and the gap between the power input shaft and the cabin is sealed by the sealing ends of the fan shaft fixed protection seat and the fan shaft rotating seat that are mutually connected to form a multi-stage sealing structure.

[0009] Furthermore, a plurality of rotating protrusions which are arranged in stages are provided on the fan shaft rotating seat, and a plurality of fixed protrusions which are arranged in stages are provided 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 with each other through the interlaced locking of the fixed protrusions and the rotating protrusions to form a multi-stage sealing structure with a serpentine channel.

[0010] The preferred embodiment of the above scheme is that the composite sealing protection assembly also includes an outer sealing baffle and an inner sealing baffle, the elastic outer sealing baffle is obliquely arranged on the outermost rotating protrusion, and the output end of the serpentine channel is sealed by the outer sealing baffle; the inner sealing baffle is multiple pieces, and an inner sealing baffle is obliquely arranged on the outer wall of each rotating protrusion, and the serpentine channel is composed of rotating protrusions, fixed protrusions and inner sealing baffles at corresponding positions.

[0011] Furthermore, the composite sealing and protection assembly also includes a high-pressure sealing dust-proof device, the high-pressure gas output end of which is connected to the serpentine channel from one side inside the cabin. Dust entering the serpentine channel from the outside is swept outward by high-pressure gas or restricted from moving into the cabin.

[0012] A preferred embodiment of the above scheme is that the composite sealing and protective assembly also includes a protective cover shell, the high-pressure sealing and dust-proof device includes a driving mechanism and an air compression mechanism, the fan shaft fixed protective seat is arranged in the protective cover shell, the protective cover shell is arranged on the end wall of the cabin where one end of the power input shaft is provided, and the high-pressure gas output end of the air compression mechanism is connected to the serpentine channel from one side of the cabin through the protective cover shell; in the process of blowing away or restricting the movement of sand and dust into the cabin, the high-pressure gas used for blowing is prepared by the air compression mechanism with the cooperation of the driving force input by the driving mechanism.

[0013] Furthermore, the high-pressure sealing and dust-proof device also includes a group of mutually meshing conical transmission bevel gear groups, the driving mechanism includes a group 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 extending out of one end of the tower, the rotating shaft is movably arranged on the cylinder wall at the lower part of the tower through the partition, and the rotating shaft is located in the middle of one end of the tower and is fixed with a conical transmission bevel gear group, and the other conical transmission bevel gear group is fixed on the power input end of the air compression mechanism.

[0014] The preferred embodiment of the above scheme is that the air compression mechanism includes a high-pressure gas storage tank, a piston cylinder, a movable piston, a driving screw, an air delivery pipe, an air intake pipe and an air supply pipe. Another conical transmission bevel gear is fixedly mounted on the end of the driving screw located outside the piston cylinder. The movable piston is screwed onto the driving screw in the piston cylinder. An air delivery pipe connected to the high-pressure gas storage tank and an air intake 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 shell. The gas input end of the air supply pipe is connected to the high-pressure gas storage tank. The air compression mechanism is arranged at the bottom of the tower tube in a manner that is adapted to the position of the high-pressure gas storage tank and the driving mechanism.

[0015] Furthermore, the air compression mechanism also includes an air intake filter box, and the air intake end of the air intake pipe is connected to the outside world through the air intake filter box; the composite sealing protection component also includes a self-cleaning component, and the self-cleaning component includes an electromagnetic adsorption control component, an electromagnetic adsorption rod and a magnetic component. An electromagnetic adsorption rod extending in the length direction is respectively provided on each fixed protrusion, and a group of magnetic components extending in the circumferential direction are respectively provided on each inner sealing baffle. The inner sealing baffles arranged outwardly tilted respectively scrape off the sand and dust on the wall surface at the corresponding position of the fixed protrusion for self-cleaning in the process of changing the inclination angle outward through each electromagnetic adsorption rod in the cooperation of the electromagnetic adsorption control component.

[0016] The beneficial effects of the present invention are as follows: the technical solution provided by the present application is based on the existing tower, head fan blade mechanism, and nacelle of a wind power generation device, and is combined with the structural characteristics of at least one generator set integrated in the nacelle, the head fan blade mechanism being fixedly mounted on the power input shaft of the generator set extending from the end face of the nacelle, and the nacelle being arranged at the top of the tower. To adapt to the use conditions of windy and sandy environments at wind power stations, the present application adds a composite sealing and protection assembly to form the protection system of the present application, and the gap between the power input shaft and the nacelle is sealed by the composite sealing and protection assembly. This changes the existing situation in which the use of single-layer rubber sealing rings or labyrinth sealing rings for dust protection results in poor sealing effect and cannot effectively prevent dust from entering the nacelle through the gap between the power input shaft and the nacelle. The composite sealing and protection assembly of the present application, due to its composite sealing structure, not only seals the gap between the power input shaft and the nacelle, but also can back-blow dust that enters the composite sealing and protection assembly outwardly to the nacelle and outside the composite sealing and protection assembly, thereby effectively improving the dust protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a wind power generation equipment involved in the anti-corrosion and anti-sand protection system for wind power generation equipment according to the present invention; Figure 2 This is a three-dimensional structural diagram of a high-pressure sealing and dust-proof device involved in the anti-corrosion and anti-sand protection system for wind power generation equipment of the present invention, arranged at the bottom of the tower; Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure in another direction; Figure 4 This is a schematic diagram of the three-dimensional structure of the wind turbine shaft fixed protection seat and the wind turbine shaft rotating seat involved in the anti-corrosion and anti-sand protection system for wind power generation equipment of the present invention, which are arranged in the gap between the power input shaft and the nacelle; Figure 5 for Figure 4 A magnified view of part A; Figure 6 A detailed enlarged view of the fan shaft fixed protection seat and the fan shaft rotating seat involved in the anti-corrosion and anti-sand protection system for wind power generation equipment of the present invention, arranged in the gap between the power input shaft and the nacelle, in a disassembled state; Figure 7 The invention is a structural schematic diagram of a self-cleaning component involved in a protection system for anti-corrosion and anti-sand of wind power generation equipment installed on a fan shaft fixed protection seat and a fan shaft rotating seat.

[0018] Marked in the figure are: tower 1, head fan blade mechanism 2, nacelle 3, power input shaft 4, foundation pile 5, sacrificial anode corrosion protection mechanism 6, rotating protrusion 7, fixed protrusion 8, outer sealing baffle 9, inner sealing baffle 10, protective cover shell 11, wind-driven fan blade 12, rotating shaft 13, partition 14, conical transmission bevel gear 15, high-pressure gas storage tank 16, piston cylinder 17, movable piston 18, drive screw 19, air supply pipe 20, air intake pipe 21, air supply pipe 22, electromagnetic adsorption control component 23, electromagnetic adsorption rod 24, magnetic suction part 25, air intake filter box 26. DETAILED DESCRIPTION

[0019] like Figures 1 to 7 The present invention provides a wind power generation equipment anti-corrosion and anti-sand protection system that can effectively improve the anti-sand and dust effect. The protection system includes a tower 1, a head fan blade mechanism 2 and a nacelle 3. At least a generator set is integrated in the nacelle 3. The head fan blade mechanism 2 is fixed on the power input shaft 4 of the generator set extending from the end face of the nacelle. The nacelle 3 is arranged at the top of the tower 1. The protection system also includes at least a composite sealing protection component. The gap between the power input shaft 4 and the nacelle 3 is sealed by the composite sealing protection component. The technical solution provided by this application is based on the existing tower, head fan blade mechanism and nacelle of the wind power generation equipment, and is combined with the structural characteristics of at least a generator set integrated in the nacelle, the head fan blade mechanism is fixed on the power input shaft of the generator set extending from the end face of the nacelle, and the nacelle is arranged at the top of the tower. In order to adapt to the use environment conditions of the wind power station with strong wind and sand, this application forms the protection system of this application by adding a composite sealing protection component, and the gap between the power input shaft and the nacelle is sealed by the composite sealing protection component. This changes the existing technology, which uses a single-layer rubber seal or a labyrinth seal for dust protection, resulting in poor sealing effect and inability to effectively prevent dust from entering the cabin through the gap between the power input shaft and the cabin. The composite sealing protection component of the present application has a composite sealing structure, which not only seals the gap between the power input shaft and the cabin, but also can back-blow the dust that enters the composite sealing protection component and discharge it outward to the cabin and outside the composite sealing protection component, thereby effectively improving the dust prevention effect. In combination with the existing technology, in order to solve the technical problems of salt spray and moisture corrosion, the protection system described in the present application also includes foundation piles 5 and a sacrificial anode corrosion protection mechanism 6. The tower 1 is arranged in a specified 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 dust impact damage suffered by the tower 1 and the foundation piles 5 is reduced or eliminated by the sacrificial anode corrosion protection mechanism 6.

[0020] Accordingly, as a key component improved in the present application, in order to maximize the protective sealing effect and at the same time adapt to the working conditions of relative rotation between the head fan blade mechanism and the cabin as much as possible, the composite sealing protection assembly of the present application includes at least a fan shaft fixed protection seat and a fan shaft rotating seat, the fan shaft rotating seat is appropriately fixed on the head fan blade mechanism 2 in a position corresponding to the power input shaft 4, the fan shaft fixed protection seat is appropriately fixed on the inner side of the cabin end in a position corresponding to the power input shaft 4, and the gap between the power input shaft 4 and the cabin 3 is sealed by the sealing ends of the fan shaft fixed protection seat and the fan shaft rotating seat that are mutually connected to form a multi-stage sealing structure. In order to form an effective multi-stage sealing structure, the present application is provided with a plurality of rotating protrusions 7 that are arranged in stages on the fan shaft rotating seat, and a plurality of fixed protrusions 8 that are 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 mutually interlaced and fastened through the fixed protrusions 8 and the rotating protrusions 7 to form a multi-stage sealing structure with a serpentine channel. The composite sealing and protective assembly of the present application also includes an outer sealing baffle 9 and an inner sealing baffle 10. The elastic outer sealing baffle 9 is tilted and arranged on the outermost rotating protrusion 7. The output end of the serpentine channel is sealed by the outer sealing baffle 9. The inner sealing baffle 10 is a plurality of pieces. An inner sealing baffle 10 is tilted and arranged 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 in the corresponding position. The sealing structure of the serpentine channel can effectively extend the length of the path for sand and dust to enter the cabin, thereby achieving the purpose of effective sealing and protection.

[0021] Furthermore, in view of the windy and dusty working environment of wind power stations, in order to prevent dust from entering the serpentine channel as much as possible, and even if some dust enters the serpentine channel, it can be blown back and discharged out of the cabin, the composite sealing protection assembly of the present application also includes a high-pressure sealing dust-proof device. The high-pressure gas output end of the high-pressure sealing dust-proof device is connected to the serpentine channel from one side inside the cabin 3. The dust entering the serpentine channel from the outside is swept outward by the high-pressure gas or restricted from moving into the cabin 3. In order to facilitate installation and improve the back-blowing effect, the composite sealing and protective assembly of the present application also includes a protective cover shell 11, the high-pressure sealing and dust-proof device includes a driving mechanism and an air compression mechanism, the fan shaft fixed protective seat is arranged in the protective cover shell 11, the protective cover shell 11 is arranged on the end wall of the cabin 3 where one end of the power input shaft 4 is provided, and the high-pressure gas output end of the air compression mechanism is connected to the serpentine channel from one side of the cabin 3 through the protective cover shell 11; in the process of blowing away or restricting the movement of sand and dust into the cabin 3, the high-pressure gas used for blowing is prepared by the air compression mechanism with the cooperation of the driving force input by the driving mechanism. More specifically, the high-pressure sealing dustproof device of the present application also includes a group of mutually meshing conical transmission bevel gear groups, and the driving mechanism includes a group 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 one end of the tower 1. The rotating shaft 13 is movably arranged on the cylinder wall at the lower part of the tower through the partition 14. The rotating shaft 13 is located in the middle of one end of the tower 1 and is fixed with a conical transmission bevel gear 15 of the conical transmission bevel gear group. The other conical transmission bevel gear 15 of the conical transmission bevel gear group is fixed 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, a movable Plug 18, drive screw 19, air delivery pipe 20, air intake pipe 21 and air supply pipe 22, another conical transmission bevel gear 15 is fixed on the end of the drive screw 19 outside the piston cylinder 17, and the mobile piston 18 is screwed on the drive screw 19 in the piston cylinder 17. An air delivery pipe 20 connected to the high-pressure gas tank 16 and an air intake pipe 21 connected to the outside are respectively provided at the upper and lower ends of the piston cylinder 17. The gas output end of the air supply pipe 22 is connected to the serpentine channel through the protective cover shell 11, and 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 through the high-pressure gas tank 16 to adapt to the position of the drive mechanism.

[0022] Finally, after the equipment has been running for a long time, when some sand and dust enters the snake channel, in order to realize the self-cleaning function of the sealing structure, to extend the manual cleaning time interval of the protection system of this application, and to 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, and the air intake end of the air intake pipe 21 is connected to the outside world through the air intake filter box 26; the composite sealing protection component also includes a self-cleaning component, and the self-cleaning component includes an electromagnetic adsorption control component 23, an electromagnetic adsorption rod 24 and a magnetic suction component 25. An electromagnetic adsorption rod 24 extending in the length direction is respectively provided on each fixed protrusion 8, and a group of magnetic suction components 25 extending in the circumferential direction are respectively provided on each inner sealing baffle 10. The inner sealing baffles 10 arranged outwardly tilted respectively scrape the sand and dust on the wall surface of the corresponding position on the fixed protrusion 8 through the electromagnetic adsorption rod 24 in the process of changing the inclination angle outward with the cooperation of the electromagnetic adsorption control component 23.

[0023] In summary, the technical solution provided by this application also has the following advantages: The present invention significantly improves the dust and sand prevention capabilities of the equipment through the synergistic effect of the multi-stage sealing structure and the positive pressure gas protection mechanism. Specifically, the dynamic sealing assembly between the head fan blade mechanism and the wind turbine power generation mechanism adopts staggered rotating lobes and fixed lobes to form a serpentine and complex staggered gas channel, which greatly extends the sand and dust intrusion path. Combined with the multiple blocking of the elastic outer sealing baffle and the inclined inner sealing baffle, the sealing performance can be enhanced by the air pressure difference in windy weather, effectively reducing the chance of sand and dust entering the mechanical moving parts of the rotating shaft. At the same time, the auxiliary fan blade mechanism uses wind energy to drive the reciprocating screw shaft, converting mechanical energy into high-pressure gas and storing it in a container. After purification by the filter device, positive pressure gas is continuously delivered to the protective cover shell to form a gas phase barrier. Even when the external air pressure changes suddenly, the stability of the sealing system can be maintained.

[0024] More importantly, the electromagnetic adsorption component cooperates with the magnetic attraction part 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 attached dust, realize self-cleaning function, and avoid wear and jamming problems caused by dust accumulation.

[0025] The tower and foundation piles are protected by a sacrificial anode anti-corrosion protection mechanism and a high-pressure gas anti-corrosion barrier, which significantly reduces the corrosion rate of the metal structure from salt spray and possible humid environments.

[0026] Example 1 The technical problem to be solved is that the existing technology has significant defects in salt spray corrosion, dust intrusion, sealing durability and maintenance convenience, resulting in high equipment maintenance costs and low reliability.

[0027] The purpose of the present 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 adopt a multi-stage sealing structure and an electromagnetic adsorption self-cleaning mechanism to improve the dust and sand prevention capabilities; and to use sacrificial anode anti-corrosion technology to extend the life of the tower and foundation piles.

[0028] The ultimate goal of this application is to significantly extend the equipment maintenance cycle and reduce the cost of the entire life cycle.

[0029] The technical solution adopted in this application is as follows: a tower, a wind turbine generator mechanism is provided at the top of the tower, and a head blade mechanism is provided at the front side of the wind turbine generator mechanism, thus forming a basic wind turbine generator device. This technical solution innovatively provides an auxiliary blade mechanism at the bottom of the tower, which is used to convert wind power into the additional power required to protect this device. In order to prevent salt and a small amount of humid gas in the air from corroding the tower / underground fixing piles, this device is also provided with a sacrificial anode anti-corrosion protection mechanism. The sacrificial anode is connected to the tower / underground fixing pile, thus protecting the tower 10 structure in a sacrificial anode manner to avoid corrosion erosion of the tower body.

[0030] The main technical features of this device are the setting of a positive pressure gas protection mechanism and a multi-stage sealing structure. First, the multi-stage sealing mechanism is explained. The multi-stage sealing mechanism includes a fan shaft rotating seat fixed on the head fan blade mechanism, and a fan shaft fixed protective seat fixed on the fan power generation mechanism. The protective cover shell is arranged in the end of the fan power generation mechanism, and the fan shaft fixed protective seat is fixed in the protective cover shell. The fan shaft fixed protective seat is provided with a plurality of fixed protrusion structures arranged in stages on the side facing the head fan blade mechanism; in order to form a multi-stage sealing mechanism that corresponds to the prescribed protective seat of the fan shaft, a plurality of rotating protrusions arranged in stages are provided on the fan shaft rotating seat provided on the head fan blade mechanism, and the rotating protrusions are all located on the outside of the power input shaft. The power input shaft is fixed to the head fan blade mechanism and rotates together with the head fan blades. The rotating protrusions and the fixed protrusions are mutually They are staggered, so when the two are snapped together and installed, a multi-stage reversing gas flow channel can be formed, thereby extending the path for dust to enter, and the intricate reversing in the middle can effectively prevent dust and impurities from entering the mechanical moving parts of the rotating shaft during windy weather. In order to further enhance the sand and dust prevention effect, an elastic outer sealing baffle is provided on the outermost rotating protrusion, which seals the opening position of the serpentine gas flow channel in the default state; the device is also provided with a plurality of inner sealing baffles, which are provided on the outer wall of the inner rotating protrusion, and the outer end of the inner sealing baffle abuts against the wall surface of the protrusion, so that a multi-stage sealing mechanism can be formed, and the outer and inner sealing baffles and the inner sealing baffle are all in an inclined state. According to their own shape setting, they always have a deformation reset tendency perpendicular to the direction of the power input shaft, thereby realizing the default abutment force at both ends of the inner sealing baffle.

[0031] In the above working process, the gas first enters the aforementioned serpentine channel from the gas supply channel, and then the entire serpentine channel is in a positive pressure state. In the default state, a better sealing effect can be achieved through the long path and the sealing plate mechanism. When there is a strong wind, the seal needs to be enhanced. The gas enters the serpentine channel and the positive pressure causes the gas to continuously flow out, and all the sealing baffles rotate slightly and open to achieve an enhanced sealing effect.

[0032] Next, the source of the sealing gas will be explained. This device is provided with an auxiliary fan blade head. When a strong wind comes, the auxiliary fan blade head below will rotate, and then drive the shaft of the fan blade head to rotate. A high-pressure gas supply container and a piston cylinder are provided at the bottom of the tower. A reciprocating screw shaft is provided in the piston cylinder. The shaft of the auxiliary fan blade head can transmit kinetic energy to the reciprocating screw shaft through a set of bevel gears. A moving piston is provided on the outer wall of the reciprocating screw shaft. The moving piston can realize reciprocating motion in the piston cylinder through the screw nut. Even if the rotation direction of the fan blade is always in one direction, it can drive the moving piston to reciprocate. During the upward movement of the piston, the lower right air inlet pipe takes in air, and the upper left air supply pipe discharges air to the high-pressure gas supply container. During the downward movement of the piston, the upper right air inlet pipe takes in air, and the lower left air supply pipe discharges air to the high-pressure gas supply container. Each air supply pipe and air inlet pipe is provided with a one-way valve, so that a steady supply of gas is achieved. To the high-pressure gas supply container, so that the high-pressure gas supply container is always positive-pressure gas. The high-pressure gas supply container is also provided with a pressure relief valve, and the pressure relief valve is connected to an air supply pipe. The air supply pipe is connected to the protective cover shell, and then through the gas supply channel, finally a gas positive-pressure sealing and dust-proof sealing mechanism is realized; in order to ensure the cleanliness of the gas required for sealing, an air intake filter box is also provided on the tower, and the air intake filter box is provided with filter materials that are replaced periodically, and the output side of the air intake filter box is connected to the two air intake pipes; in order to ensure that the shaft seal of the auxiliary fan head also needs to be dust-proofed, a protective sleeve is also provided on the outside of the shaft, and a partition plate is provided on the shaft located inside the tower. The partition plate isolates an independent positive-pressure space, which can also be connected to the air supply pipe, and then a positive-pressure gas sealing mechanism is realized; similarly, another external sealing baffle can be fixed on the open end of the protective sleeve.

[0033] By adopting the above technical solution, a sealing and anti-sand and anti-dust mechanism with an ultra-long maintenance cycle can be achieved. However, the sealing mechanism lacks a self-cleaning effect and cannot 100% guarantee that sand and dust will not enter the serpentine channel. Therefore, the technical solution described in this paragraph is an implementation method with a self-cleaning mechanism, including setting multiple electromagnetic adsorption rods in the fixed protrusion, and then setting an electromagnetic adsorption component in the protective cover shell to control when the electromagnetic adsorption rod is opened to generate magnetic attraction. Correspondingly, a magnetic attraction part that can be electromagnetically attracted is improved on the inner sealing baffle. It should be noted that the magnetic attraction part is set on the side where the inner sealing baffle can be opened (because the inner sealing baffle is set at an angle, one side cannot be opened, and the other side is relatively easy to open, such as Figure 7 As shown in the figure, the lower part of the inner sealing baffle with a marked position cannot be turned outward, and only the upper part can be turned outward and opened under the action of airflow.) When the device has been running for 1 week, the electromagnetic adsorption component can be turned on. At this time, the airflow is still flowing, but the opening section of the inner sealing baffle is adsorbed and cannot be opened. At this time, as the air pressure increases, the entire inner sealing baffle will be pushed to move in the direction of airflow. During this movement, the dust attached to the inner wall of the camera channel will be scraped off, and then the electromagnetic adsorption component will be closed, and the opening end of the inner sealing baffle will be able to open. The airflow will pass through and blow out the dust scraped off. Then the inner sealing baffle will move to the side with a larger path width under the trend of its own elastic reset, realize reset, and wait for the next scraping action. (The inclined protrusion is set to an inclined state, so the width of different channel positions is different, such as Figure 7 shown).

[0034] Compared with the existing technology, the main improvements and innovative structures of the technical solution of this application are as follows: 1. Auxiliary fan mechanism and high-pressure air supply system: Auxiliary fan blades are set at the bottom of the tower to use wind energy to drive the reciprocating screw shaft, converting mechanical energy into high-pressure gas and storing it in a container to provide continuous positive pressure gas for the sealing system.

[0035] Contains a filtering device (air inlet filter box) and a two-way air inlet pipeline to ensure clean gas and stable pressure.

[0036] 2. Multi-stage sealing structure: Dynamic sealing assembly: The fan shaft rotating seat (head blade side) and the fixed protective seat (cabin side) form staggered gas channels through staggered rotating fins and fixed fins.

[0037] 3. Elastic sealing baffle: The outer sealing baffle (default closed) is combined with the inner sealing baffle (tilt reset) to enhance sealing through air pressure difference.

[0038] 4. Electromagnetic adsorption self-cleaning mechanism: An electromagnetic adsorption rod is embedded in the fixed protrusion and cooperates with the magnetic attraction part on the inner sealing baffle.

[0039] 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, clearing the dust and then resetting it.

[0040] 5. Anti-corrosion system: Sacrificial anodes are connected to the tower / foundation piles to protect the metal structure through electrochemical corrosion protection.

Claims

1. A protection system for wind power generation equipment against corrosion and sand, comprising a tower (1), a head fan blade mechanism (2) and a nacelle (3), wherein at least a generator set is integrated in the nacelle (3), the head fan blade mechanism (2) is fixedly mounted on a power input shaft (4) of the generator set extending out of an end face of the nacelle, and the nacelle (3) is arranged on top of the tower (1), characterized in that: The protection system at least includes a composite sealing protection component, and the gap between the power input shaft (4) and the cabin (3) is sealed by the composite sealing protection component.

2. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 1, characterized in that: The protection system further comprises foundation piles (5) and a sacrificial anode anti-corrosion protection mechanism (6); the tower (1) is arranged in a specified area of the wind farm via the foundation piles (5); the sacrificial anode anti-corrosion protection mechanism (6) is arranged on the foundation piles (5); and the salt spray and / or dust impact damage suffered by the tower (1) and the foundation piles (5) is reduced or eliminated via the sacrificial anode anti-corrosion protection mechanism (6).

3. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 1 or 2, characterized in that: The composite sealing protection assembly comprises at least a fan shaft fixed protection seat and a fan shaft rotating seat, the fan shaft rotating seat and the power input shaft (4) are fixed on the head fan blade mechanism (2) in a position corresponding to the position of the fan shaft fixed protection seat and the power input shaft (4), and the fan shaft fixed protection seat and the power input shaft (4) are fixed on the inner side of the cabin end in a position corresponding to the position of the fan shaft fixed protection seat and the power input shaft (4), and the gap between the power input shaft (4) and the cabin (3) is sealed by the sealing ends of the fan shaft fixed protection seat and the fan shaft rotating seat that are mutually connected to form a multi-stage sealing structure.

4. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 3 is characterized in that: A plurality of rotating protrusions (7) are provided on the fan shaft rotating seat, and a plurality of fixed protrusions (8) are provided 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 interlaced and fastened with each other through the fixed protrusions (8) and the rotating protrusions (7) to form a multi-stage sealing structure with a serpentine channel.

5. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 4 is characterized in that: The composite sealing protection component further comprises an outer sealing baffle (9) and an inner sealing baffle (10), wherein the elastic outer sealing baffle (9) is tiltedly arranged on the outermost rotating protrusion (7), and the output end of the serpentine channel is sealed by the outer sealing baffle (9); the inner sealing baffle (10) is composed of multiple pieces, and an inner sealing baffle (10) is tiltedly arranged on the outer wall of each rotating protrusion (7), and the serpentine channel is formed by the rotating protrusions (7), the fixed protrusions (8) and the inner sealing baffles (10) at corresponding positions.

6. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 5, characterized in that: The composite sealing protection assembly 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 cabin (3), and dust entering the serpentine channel from the outside is swept outward by the high-pressure gas or is restricted from moving into the cabin (3).

7. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 6, characterized in that: The composite sealing protection assembly further includes a protective cover (11), the high-pressure sealing dustproof device includes a driving mechanism and an air compression mechanism, the fan shaft fixed protective seat is arranged in the protective cover (11), the protective cover (11) is arranged on the end wall of the cabin (3) provided with one end of the power input shaft (4), and the high-pressure gas output end of the air compression mechanism is connected to the serpentine channel from one side of the cabin (3) through the protective cover (11); in the process of blowing away or restricting the movement of sand and dust into the cabin (3), the high-pressure gas used for blowing is prepared by the air compression mechanism in cooperation with the driving force input by the driving mechanism.

8. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 7, characterized in that: The high-pressure sealing dustproof device also includes a group of mutually meshing conical transmission bevel gear groups, and the driving mechanism includes a group 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 one end of the tower (1). The rotating shaft (13) is movably arranged on the wall of the lower part of the tower through the partition (14). The rotating shaft (13) is located in the middle of one end of the tower (1), and a conical transmission bevel gear (15) of the conical transmission bevel gear group is fixedly installed. The other conical transmission bevel gear (15) of the conical transmission bevel gear group is fixedly installed on the power input end of the air compression mechanism.

9. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 8, characterized in that: The air compression mechanism includes a high-pressure gas storage tank (16), a piston cylinder (17), a movable piston (18), a driving screw (19), an air delivery pipe (20), an air intake pipe (21) and an air supply pipe (22). Another conical transmission bevel gear (15) is fixed on one end of the driving screw (19) located outside the piston cylinder (17). The movable piston (18) is screwed onto the driving screw (19) in the piston cylinder (17). An air delivery pipe (20) connected to the high-pressure gas storage tank (16) and an air intake pipe (21) connected to the outside are respectively provided at the upper and lower ends of the piston cylinder (17). The gas output end of the air supply pipe (22) is communicated with 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 adapted to the position of the driving mechanism through the high-pressure gas storage tank (16).

10. The anti-corrosion and anti-sand protection system for wind power generation equipment according to claim 9, 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, and the self-cleaning component includes an electromagnetic adsorption control component (23), an electromagnetic adsorption rod (24) and a magnetic attraction component (25), and each fixed protrusion (8) is respectively provided with an electromagnetic adsorption rod (24) extending in the length direction, and each inner sealing baffle (10) is respectively provided with a group of magnetic attraction components (25) extending in the circumferential direction, and each inner sealing baffle (10) arranged outwardly tilted scrapes off sand and dust on the wall surface of the corresponding position on the fixed protrusion (8) in the process of changing the tilt angle outward through each electromagnetic adsorption rod (24) in cooperation with the electromagnetic adsorption control component (23), and self-cleans.

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