Active ventilation wind-prevention structure and wind turbine generator set

Abstract

This invention provides an active ventilation and sand-proof structure for wind turbine generators, relating to the field of wind power generation technology. This active ventilation and sand-proof structure features an air inlet on the tower door, with a dust filter and fan installed at the inlet. The dust filter is located outside the fan, which drives external air through the filter before it enters the tower body. This achieves active ventilation inside the tower body, facilitating heat dissipation for related electrical equipment. Simultaneously, it creates positive pressure at the ventilation opening (the internal air pressure is greater than the external air pressure), ensuring that air inside the tower body can flow to the external environment. While achieving ventilation and heat dissipation, external air carrying sand and dust will not flow into the tower body through the ventilation opening. In other words, this active ventilation and sand-proof structure for wind turbine generators simultaneously addresses both tower ventilation and sand protection.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and more specifically, to an active ventilation and sand-proof structure and a wind turbine generator set. Background Technology

[0002] The tower of a wind turbine generator is one of the main protected areas for internal electrical equipment (such as frequency converters, control cabinets, transformers, etc.) and mechanical components. In windy and sandy environments, sand and dust intrusion into the tower can cause a series of problems, such as poor heat dissipation, poor electrical contact, and abnormal wear of mechanical components, seriously affecting the reliability and service life of the unit.

[0003] In existing technologies, simple metal protective mesh or louvers are typically installed at the ventilation openings to prevent large foreign objects from entering. However, this filtration structure is extremely ineffective at filtering fine sand and dust. If the filtration structure is made more dense to improve wind and sand protection, it will severely impede airflow and affect the heat dissipation of electrical equipment inside the tower (especially high-heat-generating components like frequency converters). In other words, existing wind turbine generators cannot simultaneously achieve both proper ventilation and heat dissipation for the tower and protection against wind and sand. Summary of the Invention

[0004] The present invention aims to provide an active ventilation and sand-proof structure and a wind turbine generator set that can simultaneously achieve ventilation and heat dissipation of the tower and sand-proofing.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides an active ventilation and sand-proof structure, comprising: A tower body, wherein the tower body is provided with a door frame; The tower door is rotatably installed on the door frame. The tower door has an air inlet and a ventilation opening. A dust filter and a fan are installed at the air inlet. The dust filter is located on the outside of the tower door, and the fan is located on the inside of the tower door. The fan is used to drive external air through the dust filter into the interior of the tower body.

[0006] In an optional embodiment, the dust filter is detachably connected to the tower door.

[0007] In an optional embodiment, the tower door is provided with two slide rails, which are located on both sides of the air inlet, and the dust filter is slidably engaged with the two slide rails on opposite sides.

[0008] In an optional embodiment, screws are provided on both slide rails, and the screws pass through the mesh of the dust filter to fix the dust filter.

[0009] In an optional embodiment, a dustproof structure is provided at the vent.

[0010] In an optional embodiment, the dustproof structure includes a first plate and a second plate. The first plate is located outside the second plate and a transition cavity is formed between them. The first plate is provided with a plurality of first through holes extending downward from the outside to the inside. The second plate is provided with a plurality of second through holes extending upward from the outside to the inside. The lowest second through hole corresponds to the highest first through hole in the horizontal direction.

[0011] In an optional embodiment, a sealing strip is provided between the door frame and the tower door.

[0012] Secondly, the present invention provides a wind turbine generator set, including the active ventilation and sand-proof structure described in any of the foregoing embodiments.

[0013] The beneficial effects of the active ventilation and sand-proof structure and wind turbine generator provided in this invention include: This wind turbine's active ventilation and sand-proof structure incorporates an air inlet on the tower door, with a dust filter and fan installed at the inlet. The dust filter is located outside the fan, which drives outside air through the filter before it enters the tower. This achieves active ventilation inside the tower, facilitating heat dissipation for related electrical equipment. Simultaneously, it creates positive pressure at the ventilation opening (the internal air pressure is greater than the external pressure), ensuring airflow from inside the tower to the external environment. While achieving ventilation and heat dissipation, it effectively prevents external air carrying sand from entering the tower through the ventilation opening. Therefore, this active ventilation and sand-proof structure of the wind turbine effectively combines tower ventilation and heat dissipation with sand protection, overcoming the shortcomings of existing technologies. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the active ventilation and sand-proof structure provided in an embodiment of the present invention; Figure 2 A schematic diagram illustrating the installation of the dust filter and fan provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the dustproof structure provided in an embodiment of the present invention.

[0016] Icons: 100-Tower body; 110-Door frame; 112-Sealing strip; 200-Tower door; 210-Air inlet; 220-Ventilation opening; 300-Fan; 400-Dust filter; 410-Slide rail; 420-Screw; 500-Dustproof structure; 510-First plate; 512-First through hole; 520-Second plate; 522-Second through hole; 600-Transition cavity. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0022] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0023] Please refer to Figure 1 , Figure 2 and Figure 3This invention provides an active ventilation and sand-proof structure, comprising a tower body 100 and a tower door 200. The tower body 100 is provided with a door frame 110, and the tower door 200 is rotatably mounted on the door frame 110. The tower door 200 has an air inlet 210 and a ventilation opening 220. A dust filter 400 and a fan 300 are provided at the air inlet 210. The dust filter 400 is located on the outside of the tower door 200, and the fan 300 is located on the inside of the tower door 200. The fan 300 drives external air through the dust filter 400 into the interior of the tower body 100.

[0024] A sealing strip 112 is provided between the door frame 110 and the tower door 200. The sealing strip 112 extends continuously and has high elasticity. When the tower door 200 is closed, the sealing strip 112 is tightly pressed together to form a physical sealing barrier, which can effectively ensure the sealing between the door frame 110 and the tower door 200.

[0025] The dust filter 400 is detachably connected to the outside of the tower door 200. Specifically, the tower door 200 is equipped with two slide rails 410, located on either side of the air inlet 210. The dust filter 400 slides onto the opposite sides of the two slide rails 410. Furthermore, each slide rail 410 is equipped with a screw 420, which passes through the mesh of the dust filter 400 to secure it.

[0026] The dust filter 400 can be easily and conveniently detached by using a screw 420 for locking and unlocking in conjunction with a slide rail 410 for sliding in and out. During installation, slide the dust filter 400 between the two slide rails 410, and rotate the screw 420 on the slide rail 410 until the screw 420 passes through the mesh of the dust filter 400. During disassembly, rotate the screw 420 on the slide rail 410 to disengage the screw from the dust filter 400, and then slide the dust filter 400 out from between the two slide rails 410.

[0027] The fan 300 is designed to create positive pressure at the vent 220, so that the air pressure inside the vent 220 is slightly greater than the air pressure outside. This allows the air inside the tower body 100 to continuously flow out through the vent 220, achieving ventilation and heat dissipation, while the air outside the tower body 100 carrying sand and dust will not enter through the vent 220, thus achieving wind and sand protection.

[0028] In order to accurately and timely control the internal and external pressure difference at the ventilation opening 220, in this embodiment, pressure sensors can be installed inside and outside the tower body 100 respectively. The two pressure sensors and the fan 300 are electrically connected to the controller (which can be set independently or shared with the controller of the wind turbine generator set). The two pressure sensors can detect the internal and external pressure difference of the tower body 100 respectively and send it to the controller. The controller can control the operating condition of the fan 300 according to the internal and external pressure difference to make the internal and external pressure difference stable and continuous.

[0029] To further prevent the entry of external sand and dust, a dustproof structure 500 is provided at the ventilation opening 220. The dustproof structure 500 can adopt different structures as needed. In this embodiment, the dustproof structure 500 includes a first plate 510 and a second plate 520. The first plate 510 is located outside the second plate 520, and a transition cavity 600 is formed between the two. The first plate 510 is provided with a plurality of first through holes 512 extending downward from the outside to the inside, that is, the end of the first through hole 512 near the second plate 520 is lower than the end away from the second plate 520. The second plate 520 is provided with a plurality of second through holes 522 extending upward from the outside to the inside, that is, the end of the second through hole 522 near the first plate 510 is lower than the end away from the first plate 510. The lowest second through hole 522 corresponds to the highest first through hole 512 in the horizontal direction.

[0030] The dustproof structure 500 can effectively prevent external sand and dust from entering while achieving ventilation and heat dissipation (i.e., internal air can flow out sequentially through the second through hole 522, the transition cavity 600, and the first through hole 512). Even if external air can carry sand and dust through the first through hole 512, the airflow will be obstructed after entering the transition cavity 600, and the sand and dust carried will fall and deposit at the bottom of the transition cavity 600, instead of entering the interior of the tower body 100 through the second through hole 522.

[0031] The working principle and process of this active ventilation and sand-proof structure are as follows: 1. Active purification and positive pressure maintenance: When active ventilation is required (such as in windy or dusty weather or when equipment overheats), fan 300 is activated for ventilation. Outside air is forcibly drawn in, deeply filtered and purified by dust filter 400, and then delivered as clean air into the interior of the tower body 100. The continuous input of clean air can establish a slightly positive pressure inside the tower body 100 that is slightly higher than the external environment (approximately 10-50 Pa), thereby effectively preventing the natural convection of outside air into the interior of the tower body 100.

[0032] 2. Passive Filtration and Natural Ventilation: When active ventilation is not required (e.g., when the weather is good or the equipment is not overheated), the dustproof structure 500 of the vent 220 can still achieve basic air exchange and perform a certain filtering function by relying on natural wind pressure and thermal pressure. With a slight positive pressure inside the tower body 100, air mainly seeps out from the inside of the dustproof structure 500, effectively preventing external sand and dust from naturally infiltrating through this area.

[0033] 3. Synergistic Sealing: Regardless of whether active ventilation is used, the sealing strip 112 between the tower door 200 and the door frame 110 serves as the main seal, blocking most of the sand and dust. Furthermore, when a slight positive pressure is maintained inside the tower body 100, an "air curtain" or "pneumatic seal" can be formed at the sealing strip 112, ensuring that even if there are microscopic defects in the sealing strip 112, the airflow direction is from the inside out, thus completely eliminating the intrusion path of sand and dust from all gaps, such as door seams.

[0034] This active ventilation and sand-proof structure features an air inlet 210 on the tower door 200, with a dust filter 400 and a fan 300 installed at the inlet 210. The dust filter 400 is located outside the fan 300, which drives external air through the filter before it enters the tower body 100. This achieves active ventilation inside the tower body 100, facilitating heat dissipation for related electrical equipment. Simultaneously, it creates positive pressure at the vent 220 (the internal air pressure of the vent 220 is greater than the external air pressure), ensuring that air inside the tower body 100 can flow to the external environment. While achieving ventilation and heat dissipation, it prevents external air carrying sand from flowing into the tower body 100 through the vent 220, thus achieving sand-proofing. Therefore, this active ventilation and sand-proofing structure can simultaneously address both tower ventilation and sand-proofing, ensuring the stable and reliable operation of the wind turbine generator.

[0035] The present invention provides a wind turbine generator set, including the aforementioned active ventilation and sand-proof structure, which can simultaneously achieve sand-proofing and ventilation and heat dissipation of the tower, ensuring its stable and reliable operation.

[0036] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An active ventilation and sand-proof structure, characterized in that, include: A tower body, wherein the tower body is provided with a door frame; The tower door is rotatably installed on the door frame. The tower door has an air inlet and a ventilation opening. A dust filter and a fan are installed at the air inlet. The dust filter is located on the outside of the tower door, and the fan is located on the inside of the tower door. The fan is used to drive external air through the dust filter into the interior of the tower body.

2. The active ventilation and sand-proof structure according to claim 1, characterized in that, The dust filter is detachably connected to the tower door.

3. The active ventilation and sand-proof structure according to claim 2, characterized in that, The tower door is equipped with two slide rails, which are located on both sides of the air inlet. The dust filter is slidably fitted onto the two slide rails on opposite sides.

4. The active ventilation and sand-proof structure according to claim 3, characterized in that, Screws are provided on both slide rails, and the screws pass through the mesh of the dust filter to fix the dust filter.

5. The active ventilation and sand-proof structure according to claim 1, characterized in that, The ventilation opening is equipped with a dustproof structure.

6. The active ventilation and sand-proof structure according to claim 5, characterized in that, The dustproof structure includes a first plate and a second plate. The first plate is located outside the second plate and a transition cavity is formed between them. The first plate is provided with a plurality of first through holes extending downward from the outside to the inside. The second plate is provided with a plurality of second through holes extending upward from the outside to the inside. The lowest second through hole corresponds to the highest first through hole in the horizontal direction.

7. The active ventilation and sand-proof structure according to claim 1, characterized in that, A sealing strip is provided between the door frame and the tower door.

8. A wind turbine generator set, characterized in that, Includes the active ventilation and sand-proof structure as described in any one of claims 1-7.

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