Flow guide cover for wind turbine generator

Abstract

The utility model relates to the technical field of flow guide covers, in particular to a flow guide cover for a wind turbine generator, which comprises three annular cover walls and an end cover, the cover walls are sequentially connected, the cover walls are fixedly connected with one another, the end cover is fixedly connected to the top ends of the cover walls, and blade holes are arranged on the outer side walls of the cover walls close to the top ends. The air inlet is formed in the cover wall, and the sealing plate, the sealing ring and other structures which can be controlled through the screw rod and the rotary knob are arranged, so that the air inlet can be closed in daily work, and external water such as rain and snow is effectively prevented from entering the flow guide cover; a series of problems such as corrosion of a hub of the wind driven generator and moisture short circuit of an electrical system caused by entering of rainwater are avoided, normal operation of internal parts of the wind turbine generator is guaranteed, the service life of the parts is prolonged, the equipment failure risk is reduced, and stable operation of the whole wind turbine generator is guaranteed; and the sealing effect of the air inlet is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fairing technical field especially relates to a kind of fairing for wind turbine generator unit. BACKGROUND

[0002] Wind energy is now often used clean energy, using wind power generation can save coal and oil resources, while reducing environmental pollution;Fairing is the fairing device covered in the hub of wind turbine, according to aerodynamics principle, generally for streamline shell, can guide the airflow into wind wheel, reduce resistance and protect each component in the hub of unit from the intrusion of external environment, ensure normal operation, prolong service life

[0003] In prior art, such as Chinese patent No. CN219034917U discloses a kind of fairing of wind turbine generator unit, including three circular ring connection cover wall, the outer side wall of cover wall is close to top end and is equipped with blade hole, the inner side wall of cover wall is opened at the edge of left and right two ends and is equipped with recess communicating to outside, still include: end cap, fixed in the top end of three cover wall;Connecting plate, by a plurality of bolts fixed in the connecting place of the inner side of two adjacent cover wall, the convex arc surface of connecting plate is opened in the middle and is equipped with clamping groove, clamping groove is equipped with sealing strip with the size of two interfaces recess compatible, the thickness of sealing strip is equal to the depth of clamping groove and recess.This utility model connects cover wall using connecting plate, facilitate assembly and disassembly.

[0004] Although the air hole on cover wall can provide fresh air when personnel maintenance, improve maintenance environment, but in daily work, the air hole lacks closed means, in rainy and snowy weather, rainwater from outside can enter the inside of fairing, rainwater itself contains certain impurities and acidic substances and other components, when it enters the inside of fairing, can directly contact the hub of wind turbine and other metal components, long time in this humid and corrosive component environment, the protective layer on the surface of metal hub can be gradually destroyed, in turn cause the rust phenomenon of metal, reduce the structural strength of hub, affect its normal mechanical properties and service life, increase the risk of equipment failure, even possibly lead to the damage of key parts of hub, affect the stable operation of entire wind turbine generator unit. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problem mentioned in the above background art, and proposes a kind of fairing for wind turbine generator unit.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a fairing for wind turbine generator unit, including three annular connection cover wall and end cover in proper order, the cover wall is fixedly connected with each other, the end cover is fixedly connected at the top of cover wall, the outside wall of cover wall is equipped with vane hole near the top, the surface of cover wall is equipped with air inlet below vane hole, the position of air inlet facing cover wall inner side is equipped with annular groove, the annular groove is linked with air inlet, the inner wall of cover wall is fixedly connected with support frame, the surface of support frame is fixedly connected with sleeve pipe that is linked with support frame, the inside screw thread of sleeve pipe is connected with screw rod, one end of screw rod is fixedly connected with knob, the other end of screw rod is provided with sealing plate, the sealing plate is clamped in the inside annular groove, the periphery of the convex of the one side of sealing plate facing air inlet is equipped with sealing ring, the sealing ring can be clamped in the inside annular groove.

[0007] Preferably, the sealing ring is made of elastic rubber.

[0008] Preferably, the other end of the screw rod away from the knob is clamped in the inside of the sealing plate, and the sealing plate and the one end of the screw rod clamped in the inside thereof can rotate.

[0009] Preferably, the junctions of the three cover walls are provided with sealing strips, the junctions of the end cover and the three cover walls are provided with sealing gaskets, and the sealing strips and the sealing gaskets are made of the same material as the sealing ring.

[0010] Preferably, the inside of the air inlet is fixedly connected with a screen, and the screen is located in the air inlet away from the sealing plate.

[0011] Preferably, the junctions of the three cover walls are fixedly connected with fixed plates, the positions of the cover walls close to the top are fixedly connected with mounting plates one, the bottom of the end cover is fixedly connected with mounting plates two corresponding to the mounting plates one, and the fixed plates and the mounting plates one and two are fixedly connected by bolts.

[0012] Preferably, one of the cover walls is provided with an access door, and the cover wall is hinged to one side of the access door.

[0013] Preferably, the end cover is embedded with a light-transmitting window, and the light-transmitting window is made of transparent glass.

[0014] Preferably, the support frame is provided with a guide hole, the sealing plate is fixedly connected with a guide rod at a position corresponding to the guide hole, and the guide rod is inserted into the guide hole.

[0015] Preferably, the outer circular surface of the knob is fixedly connected with anti-slip ribs, and the anti-slip ribs are uniformly distributed on the surface.

[0016] Compared with the prior art, the utility model has the advantages and positive effects that:

[0017] 1、 the utility model discloses, through setting up the air inlet on the cover wall, and being equipped with the sealing plate and sealing ring etc. structure that can pass through screw rod, knob control, can close the air inlet when daily work, effectively prevent rain and snow etc. external moisture enters the fairing inside, avoided because rainwater enters leads to such as wind turbine hub corrosion, electrical system damp short circuit etc. a series of problems, guarantee the normal operation of the internal component of wind turbine generator unit, prolongs the component service life, reduces the equipment failure risk, ensures the stable operation of whole wind turbine generator unit, and the sealing effect of air inlet is enhanced with the cooperation of annular groove and sealing plate, sealing ring.

[0018] 2、 the utility model discloses, through setting up the guide hole on the support frame, and the guide rod is set up on the sealing plate and is inserted in the guide hole, so that when the sealing plate is moved through the knob control, the guide rod and guide hole can play the guiding role, ensure that the sealing plate moves stably to the annular groove along the correct direction, and the possibility that the sealing plate is rotated under the influence of screw rod rotation can also be further avoided, and the possibility that the sealing ring is worn by rotating. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A schematic view of the fairing for wind turbine generator unit is provided for the utility model;

[0020] Figure 2 An exploded schematic view of the fairing for wind turbine generator unit is provided for the utility model;

[0021] Figure 3 A fairing for wind turbine generator unit is provided for the utility model; Figure 2 An enlarged view of A in the middle;

[0022] Figure 4 An exploded schematic view of the end cover of the fairing for wind turbine generator unit is provided for the utility model;

[0023] Figure 5 An exploded schematic view of the cover wall of the fairing for wind turbine generator unit is provided for the utility model;

[0024] Figure 6 A partial exploded schematic view of the fairing for wind turbine generator unit is provided for the utility model.

[0025] LEGEND:

[0026] 1, cover wall; 2, end cover; 3, blade hole; 4, access door; 5, light window; 6, air inlet; 7, screen; 8, annular groove; 9, support frame; 10, sleeve; 11, screw; 12, sealing plate; 13, knob; 14, sealing ring; 15, guide rod; 16, guide hole; 17, fixed plate; 18, mounting plate one; 19, mounting plate two; 20, bolt; 21, sealing strip; 22, sealing washer; 23, anti-skid rib. DETAILED DESCRIPTION

[0027] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below with reference to the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced without the specific details, which are different from the description, and therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0029] Example 1: as Figure 1 - Figure 6As shown, the utility model provides a technical scheme: a fairing for wind turbine generator unit, including three circular ring connection cover wall 1 and end cover 2 in proper order, cover wall 1 is fixedly connected with each other, and end cover 2 is fixedly connected at the top end of cover wall 1, the outer side wall of cover wall 1 is equipped with blade hole 3 near the top end, the surface of cover wall 1 is equipped with air inlet 6 below blade hole 3, the position of air inlet 6 towards the inner side of cover wall 1 is equipped with annular groove 8, and annular groove 8 is communicated with air inlet 6, the inner wall of cover wall 1 is fixedly connected with support frame 9, the surface of support frame 9 is fixedly connected with sleeve pipe 10 communicated with support frame 9, the inside of sleeve pipe 10 is screw connected with screw rod 11, one end of screw rod 11 is fixedly connected with knob 13, the other end of screw rod 11 is provided with sealing plate 12, sealing plate 12 is clamped in the inside of annular groove 8, the protruding periphery on the side of sealing plate 12 towards air inlet 6 is sleeved with sealing ring 14, sealing ring 14 can be clamped in the inside of annular groove 8, sealing ring 14 is of elastic rubber material, the end of screw rod 11 away from knob 13 is clamped in the inside of sealing plate 12, sealing plate 12 and the end of screw rod 11 clamped in its inside can rotate, the joint of three cover wall 1 is provided with sealing strip 21, and the joint of end cover 2 and three cover wall 1 is provided with sealing washer 22, sealing strip 21 and sealing washer 22 are of the same material with sealing ring 14, the inside of air inlet 6 is fixedly connected with screen 7, screen 7 is located in the position of air inlet 6 away from sealing plate 12, the joint of three cover wall 1 is fixedly connected with fixed plate 17 correspondingly, the position of cover wall 1 near the top end is fixedly connected with mounting plate one 18, the bottom of end cover 2 is fixedly connected with mounting plate two 19 correspondingly to the position of mounting plate one 18, and fixed plate 17 is fixedly connected through bolt 20 between each other and mounting plate one 18 and mounting plate two 19, one of cover wall 1 is equipped with access door 4, and cover wall 1 is hinged to the side of access door 4, and end cover 2 is inlaid with light-transmitting window 5, and light-transmitting window 5 is of transparent glass material.

[0030] In the embodiment, by setting the air inlet 6 on the cover wall 1, and being equipped with the sealing plate 12 which can be controlled by the screw rod 11 and the knob 13, and the sealing ring 14 and other structures, the air inlet 6 can be closed in daily work, effectively preventing external water such as rain and snow from entering the inside of the flow guide cover, avoiding a series of problems such as wind turbine hub corrosion, electrical system damp short circuit caused by rainwater entering, protecting the normal operation of the internal components of the wind turbine generator, prolonging the service life of the components, reducing the risk of equipment failure, ensuring the stable operation of the whole wind turbine generator, at the same time, the annular groove 8 cooperates with the sealing plate 12 and the sealing ring 14, enhancing the sealing effect of the air inlet 6; the sealing ring 14 is made of elastic rubber material, which has good elasticity and sealing performance, can better fill the gap between the annular groove 8 and the sealing plate 12, further improve the sealing effect of the air inlet 6, and play an important role in preventing external water and impurities from entering, and the elastic rubber material is relatively durable, can adapt to multiple sealing operations, and ensure long-term sealing; the sealing plate 12 and the screw rod 11 can rotate, after the sealing plate 12 is clamped into the annular groove 8, the rotation of the sealing plate 12 can be avoided, the wear of the sealing ring 14 caused by rotation can be avoided, and the service life of the sealing ring 14 can be improved; by setting the sealing strip 21 at the joint of the three cover walls 1 and the sealing gasket 22 at the joint of the end cover 2 and the cover wall 1, the sealing of the whole flow guide cover can be ensured, and external rainwater, sand and other impurities can be prevented from entering the inside through the gap, forming a comprehensive sealing protection system, which cooperates to protect the stability of the internal environment of the wind turbine generator and reduce the erosion of external factors on the internal components; the mesh 7 is fixedly connected inside the air inlet 6, which can effectively block the entry of large impurities and foreign matters from the outside into the inside of the flow guide cover, preventing these objects from entering the inside during maintenance work and causing collision damage to the internal wind turbine hub, support frame 9 and other components; the cover wall 1 and the end cover 2 are connected and fixed by the fixed plate 17, the mounting plate one 18, the mounting plate two 19 and the bolt 20, so that the connection between the cover wall 1 and the end cover 2 is firm and reliable, ensuring the stability of the overall structure of the flow guide cover, and also facilitating the disassembly and replacement of damaged parts in the later period; the maintenance door 4 is hinged to one side of the cover wall 1, which can be conveniently opened to enter the inside when the staff needs to maintain, check and operate the components of the wind turbine generator inside the flow guide cover; the light-transmitting window 5 is embedded in the end cover 2 and made of transparent glass material, on the one hand, external light can enter the inside of the flow guide cover, which can provide better light conditions for the staff when they enter the inside for maintenance and inspection, without the need to carry additional lighting equipment; on the other hand, the glass material can ensure the sealing performance and does not affect the blocking effect of the flow guide cover on the external environment, which meets the needs of lighting and sealing protection.

[0031] Embodiment 2: as Figure 6As shown, the support frame 9 is provided with a guide hole 16, and the sealing plate 12 is fixedly connected with a guide rod 15 at a position corresponding to the guide hole 16, the guide rod 15 is inserted into the guide hole 16, the outer surface of the knob 13 is fixedly connected with anti-skid ribs 23, and the anti-skid ribs 23 are uniformly distributed on the surface.

[0032] In the embodiment, the support frame 9 is provided with the guide hole 16, and the sealing plate 12 is provided with the guide rod 15 corresponding to the guide hole 16 and inserted into the guide hole 16, so that when the sealing plate 12 is moved by the knob 13, the guide rod 15 and the guide hole 16 can play a guiding role, ensuring that the sealing plate 12 moves smoothly in the correct direction into the annular groove 8, and further avoiding the possibility that the sealing plate 12 is affected by the rotation of the screw rod 11 and rotates, avoiding the possibility that the sealing ring 14 rotates and wears; the outer surface of the knob 13 is fixedly connected with the anti-skid ribs 23 and uniformly distributed, and when the staff rotates the knob 13 to operate the sealing plate 12, the anti-skid ribs 23 can increase the friction between the hands and the knob 13, prevent the hands from slipping, and facilitate easier and more stable rotation of the knob 13.

[0033] The working principle of the embodiment is as follows: in use, during daily work, when the staff needs to enter the fairing for maintenance work, first, the wind turbine generator set is stopped running, then the maintenance door 4 on the cover wall 1 is opened, then the staff enters the fairing, the transparent observation window on the end cover 2 can ensure that the external light enters the fairing, creating a bright visual environment for the staff, facilitating the subsequent work, when the staff enters the fairing, the air inlet 6 needs to be opened to ensure the air circulation in the fairing and provide fresh air, first, the staff needs to rotate the knob 13, the knob 13 drives the screw rod 11 in the sleeve 10 on the support frame 9 to rotate, the screw rod 11 rotates and drives the sealing plate 12 away from the annular groove 8 at the same time, at this time, the air inlet 6 is opened, after the air inlet 6 is opened, the external air enters the fairing, the internal screen 7 of the air inlet 6 can filter the air entering the fairing, which can effectively block the external larger impurities and foreign matters from entering the inside of the fairing, preventing these objects from colliding and damaging the internal wind turbine hub, support frame 9 and other components during the maintenance work, when the air inlet 6 needs to be sealed (such as preventing external water such as rain and snow from entering during daily work), the staff rotates the knob 13 in the opposite direction, since the end of the screw rod 11 away from the knob 13 is clamped in the inside of the sealing plate 12 and both can rotate, the knob 13 drives the screw rod 11 to rotate, under the action of the threaded connection with the sleeve 10, the screw rod 11 pushes the sealing plate 12 to move along the guide rod 15 in the guide of the guide hole 16 towards the annular groove 8, until the sealing plate 12 is clamped in the annular groove 8, and the sealing plate 12 has a protruding outer periphery of the sealing ring 14 made of elastic rubber material on the side facing the air inlet 6, the sealing ring 14 will also be clamped in the annular groove 8, using the elasticity of the sealing ring 14 to fill the gap between the sealing plate 12 and the annular groove 8, realizing reliable sealing of the air inlet 6, effectively blocking the external rainwater, impurities and the like from entering the inside of the fairing, while in the process of daily use, the sealing strips 21 and sealing rings 22 arranged at the joint of the fairing can ensure the sealing property of the whole fairing, avoiding the entry of external rainwater, sand and the like from the gap of these joints into the inside, forming a comprehensive sealing protection system, which cooperates to ensure the stability of the internal environment of the wind turbine generator set, reduces the erosion of external factors on the internal components, when the wind turbine generator set is running, air will blow to the wind wheel from all directions, the fairing is streamline-shaped, which can make the airflow smoothly flow along the surface, reducing the turbulence, separation and turbulence formation and other phenomena in the airflow during the flow process, for example, when the airflow encounters a non-streamline-shaped object, it is easy to form a vortex behind the object, resulting in energy loss, while the streamline-shaped fairing can effectively avoid this situation, guiding the airflow to pass through the wind wheel in an orderly manner, making the wind energy more efficiently act on the blade, thereby improving the wind energy utilization efficiency, creating favorable conditions for the wind turbine generator set to better convert wind energy into mechanical energy.

[0034] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A fairing for a wind turbine generator, comprising three cover walls (1) connected in sequence in a circular ring shape and an end cover (2), characterized in that: The cover wall (1) is fixedly connected with each other, the end cover (2) is fixedly connected at the top end of the cover wall (1), the outer side wall of the cover wall is provided with a blade hole (3) near the top end, the surface of the cover wall (1) is provided with an air inlet (6) below the blade hole (3), the air inlet (6) is provided with an annular groove (8) facing the position of the inner side of the cover wall (1), the annular groove (8) is communicated with the air inlet (6), the inner wall of the cover wall (1) is fixedly connected with a support frame (9), the surface of the support frame (9) is fixedly connected with a sleeve (10) communicated with the support frame (9), the inside of the sleeve (10) is threadedly connected with a screw rod (11), one end of the screw rod (11) is fixedly connected with a knob (13), the other end of the screw rod (11) is provided with a sealing plate (12), the sealing plate (12) is clamped in the inside of the annular groove (8), the protruding periphery on the side of the sealing plate (12) facing the air inlet (6) is sleeved with a sealing ring (14), and the sealing ring (14) can be clamped in the inside of the annular groove (8).

2. A wind turbine nacelle according to claim 1, characterized in that: The sealing ring (14) is made of elastic rubber material.

3. A wind turbine nacelle according to claim 1, characterized in that: The end of the screw rod (11) away from the knob (13) is clamped in the inside of the sealing plate (12), and the sealing plate (12) and the end of the screw rod (11) clamped in the inside thereof can rotate.

4. A wind turbine nacelle according to claim 1, characterized in that: The joints of the three cover walls (1) are provided with sealing strips (21), the joints of the end cover (2) and the three cover walls (1) are provided with sealing gaskets (22), and the sealing strips (21) and the sealing gaskets (22) are made of the same material as the sealing ring (14).

5. A wind turbine nacelle according to claim 1, wherein: The inside of the air inlet (6) is fixedly connected with a screen (7), and the screen (7) is located in the air inlet (6) away from the sealing plate (12).

6. A wind turbine nacelle according to claim 1, characterized in that: The joints of the three cover walls (1) are correspondingly fixedly connected with fixing plates (17), the cover walls (1) are fixedly connected with mounting plates (18) near the top end, the bottom of the end cover (2) is fixedly connected with mounting plates (19) corresponding to the mounting plates (18), and the fixing plates (17) and the mounting plates (18) and (19) are fixedly connected through bolts (20).

7. A wind turbine nacelle according to claim 1, characterized in that: One of the cover walls (1) is provided with an access door (4), and the cover wall is hinged to one side of the access door (4).

8. A wind turbine nacelle according to claim 1, characterized in that: The end cover (2) is embedded with a light-transmitting window (5) made of transparent glass material.

9. A wind turbine nacelle according to claim 1, characterized in that: The support frame (9) is provided with a guide hole (16), the sealing plate (12) is fixedly connected with a guide rod (15) corresponding to the position of the guide hole (16), and the guide rod (15) is inserted into the inside of the guide hole (16).

10. A wind turbine nacelle according to claim 1, characterized in that: The outer circular surface of the knob (13) is fixedly connected with anti-skid ribs (23) uniformly distributed on the surface.

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