Rain deflector and wind turbine rotor blade

Abstract

The invention relates to a rain deflector (200) for a wind turbine rotor blade (110). The rain deflector (200) includes a linear profile piece (202) formed as one piece. The linear profile (202) is made of an elastomeric material. The rain deflector (200) is configured to be placed on an outer surface (130) of the wind turbine rotor blade (110) such that the linear profile (202) surrounds a root portion (114) of the wind turbine rotor blade (110). The invention also relates to a wind turbine rotor blade (110).

Description

Technical Field

[0001] This invention relates to rain deflectors for wind turbines and wind turbine rotor blades. Background Technology

[0002] In a typical wind turbine, a nacelle mounted on a tower supports the rotor, which includes a rotor hub and multiple wind turbine rotor blades. Each wind turbine rotor blade is connected to the rotor hub at its root end via a pitch bearing, wherein the wind turbine rotor blade is directly connected to the pitch bearing or indirectly connected to the pitch bearing via an extension, wherein the extension is connected to the pitch bearing. The pitch bearing allows the wind turbine rotor blade to rotate or "pitch" about its axis. The rotor hub may be wholly or partially housed by a rotator, which protects the rotor hub from environmental influences and improves the rotor's aerodynamic characteristics.

[0003] Typically, the rotator includes a blade opening for each rotor blade through which the wind turbine rotor blade extends. The diameter of the blade opening in the rotator is usually slightly larger than the outer diameter of the rotor blade to allow lateral movement of the wind turbine rotor blade during installation, even as each wind turbine rotor blade moves through the blade opening, and to allow the rotor blade to pitch during wind turbine operation. Therefore, once the wind turbine rotor blade is mounted on the pitch bearing, an uncovered annular gap is maintained between the rotator and the outer surface of the corresponding wind turbine rotor blade.

[0004] Through this gap, the rotor hub and pitch bearings are exposed to the environment and are particularly susceptible to water that travels along the rotor blades toward and from the root onto the rotor hub and pitch bearings. Depending on the climate zone, further external influences may include increased air humidity levels, rain, snow, the presence of solid abrasive particles such as sand, impurities, corrosive gases, and high atmospheric salinity. These factors can negatively impact wind turbine components and accelerate corrosion development, leading to accelerated wear. Summary of the Invention

[0005] One objective of this invention is to reliably avoid or at least minimize the penetration of external factors into the gap between the rotator and the rotor blades.

[0006] This objective is achieved through the independent claims and the corresponding dependent claims.

[0007] According to a first aspect, a rain deflector for a wind turbine rotor blade is disclosed. The rain deflector includes a linear profile formed as a single element, the linear profile being made of an elastomeric material. The rain deflector is configured to be placed on the outer surface of the wind turbine rotor blade such that the linear profile surrounds the root portion of the wind turbine rotor blade.

[0008] The linear profile of the present invention, made of a single component and an elastomeric material, enables the installation of a rain deflector that can be easily and effectively. The disclosed rain deflector provides a flexible solution, for example, allowing for easy adjustment of the axial position of the deflector, as will become clear from the following description.

[0009] Linear profile components can be installed on rotor blades without the mechanical impact of drilling holes in the blade surface. For example, no material bonding or fastening devices such as screws or the like are required. The surface of the blade root portion remains unaffected. This eliminates the need for preparation or additional work on the rotor blades at the installation site, i.e., in the wind farm, to install the rain deflector. Therefore, the rotor blades can be installed quickly after delivery, a so-called "on-demand" method.

[0010] In addition, the linear profile provides very high sealing performance to prevent substances such as water from entering the rotor and rotor hub.

[0011] Due to the elasticity of the material, linear profile components can be installed on wind turbine rotor blades with root sections of varying diameters, requiring only adjustment of the length of the linear profile component. Furthermore, due to the elasticity of the material, the linear profile component can compensate for non-uniformities on the outer surface of the root section. These non-uniformities can be caused, for example, by the manufacturing of the rotor blades or by the connection between the deflector and other components of the rotor or the rotor itself.

[0012] For example, the linear profile is secured to the root of the rotor blade by at least one tensioning device that clamps the rain deflector to the wind turbine rotor blade. This tensioning device is configured to secure the linear profile to the rotor blade in a force-locking manner.

[0013] Linear profile components, for example, are made of ethylene propylene diene monomer rubber. This material is inherently endowed with the aforementioned advantages and functions.

[0014] For installation, the linear profile component has a mounting surface that contacts the outer surface of the rotor blades in the installed state. Here and below, the vertical direction refers to the direction orthogonal to the mounting surface.

[0015] According to one embodiment, in order to form a ring around the root portion, the opposing longitudinal ends of the linear profile member can be connected by a connecting plate. In the installed state, the linear profile member may not form a closed ring around the root portion of the rotor blade. The linear profile member can be a nearly closed ring with a small gap between its longitudinal ends. The ends are connected to form a closed ring by means of the connecting plate. For example, the plate is screwed onto the longitudinal ends of the linear profile member to form a closed ring.

[0016] According to one embodiment, the linear profile includes a foot section from which a sealing lip protrudes, wherein the foot section is configured to rest directly on the outer surface of the root portion. The sealing lip is designed to contact another component of the rotator or rotor hub to seal against the rotator or the other component. The foot section has a mounting surface that contacts the outer surface of the rotor blades in the installed state.

[0017] According to one embodiment, the sealing lip has a cross-section that tapers at least partially in the direction toward its outer end. In other words, the sealing lip tapers away from the support leg section. This makes the sealing lip more flexible toward its outer end and allows for good sealing contact with the rotator or other components. In particular, this means that the sealing lip is particularly easy to bend and fits well against its counterpart for sealing.

[0018] According to the embodiment, the sealing lip has a first section that protrudes vertically from the support section. If the rain deflector is mounted in a ring arrangement on the root portion of the rotor blade, "vertical" refers to the radial direction relative to the longitudinal direction of the wind turbine rotor blade. This ensures a high sealing effect.

[0019] According to one embodiment, the first segment has a cross-section that tapers towards the outer end of the sealing lip. Therefore, for example, only the first segment of the sealing lip tapers, while the other portions of the sealing lip can be designed differently, for example, having a uniform wall thickness. This helps to achieve an optimal design for the sealing function.

[0020] According to one embodiment, the sealing lip has a second segment that extends from the first segment and is inclined at a predetermined angle relative to the first segment. This facilitates the sealing function. By inclining the second segment relative to the first segment, the second segment—in its mounted state located on the root portion—faces the rotator or other component as described above.

[0021] The above-described embodiments of the sealing lip provide a specific profile shape, the primary purpose of which is to minimize cross-sectional deformation when mounted on the cylindrical / circular surface of a wind turbine rotor blade, such as the root portion. This is achieved through a tapered cross-section of the first (e.g., vertical) segment. The longer the first segment, the farther it extends from the axis of rotation of the wind turbine rotor blade, and the greater the forces acting upon it. The thinner the cross-section, the lower its resistance to forces. Therefore, the material of the linear profile, such as an elastomeric material, expands around the periphery, but there is minimal variation in the cross-section near the profile. The height and thickness of the first segment depend on the expected height at which the sealing lip (e.g., the second segment or a portion thereof) should contact or overlap with the corresponding sealing portion (e.g., another component of the rotor hub or rotor hub).

[0022] The second (inclined) section is directly used to overlap with another component of the corresponding sealing section, such as a rotator or rotor hub. The inclination angle of the second section can theoretically be between 0.1 degrees and 89.9 degrees. Preferably, this angle is in the range of 1 degree to 45 degrees relative to the first section for better sliding. Additionally, the total length of the sealing lip depends on the so-called cover portion, which defines a portion of the sealing lip or the length of the second section, covering or overlapping the corresponding sealing section. For example, the length of the cover portion is 20 mm. Furthermore, the cover portion also depends on the proximity of the linear profile member to the opposing sealing section in the longitudinal direction relative to the wind turbine rotor blade.

[0023] According to one embodiment, the second section includes a cross-section with a constant thickness along the direction toward the outer end of the sealing lip. For example, a constant thickness of 5 mm is provided. Typically, this thickness depends on the resistance to the influence of external mechanical factors, wherein, below a certain thickness of the second section, the upper end of the sealing lip, such as the free end, can curl in the opposite direction, i.e., away from another component of the corresponding sealing part, such as a rotator or rotor hub. Additionally, the thickness of the second section is selected such that the sealing lip has a certain degree of flexibility, which allows the sealing lip to adhere to the surface of the corresponding sealing part.

[0024] According to one embodiment, the support leg section has a first groove and a second groove. The first groove is designed to accommodate a first tensioning device, and the second groove is designed to accommodate a second tensioning device, wherein the tensioning devices are configured to clamp and secure the rain deflector to the rotor blade. Each groove serves as a guide for the corresponding tensioning device to secure the rain deflector to the root portion. In particular, the tensioning device is received in the corresponding groove in a form-fitting manner. The tensioning device is thus securely held at the rain deflector, especially during operation of the wind turbine rotor blade.

[0025] According to the embodiment, two grooves are arranged on opposite sides of the sealing lip. This prevents the sealing lip from tilting and securely and stably fastens the rain deflector to the rotor blades.

[0026] According to one embodiment, in the region of at least one recess, the support segment has a groove-shaped recess that extends at least partially below at least one recess in a direction away from the sealing lip. In other words, a slit exists below the corresponding recess. Below refers to the bottom of the recess or the side facing the rotor blade. The groove-shaped recess extends in a direction along the mounting surface of the support segment or linear profile (see above). The groove-shaped recess provides additional safety. During rotation, the wind turbine rotor blades undergo deformation on their surface. This also applies to the rain deflector and one or more tensioning devices. This, in turn, results in a cutting effect between the tensioning device (e.g., a metal strip) and the linear profile. Without this groove-shaped recess, the cutting effect acts directly on the vertical main segment. Due to the groove-shaped recess, the tensioning device only cuts the inner wall of the corresponding recess. In the worst case (if the inner wall is completely cut), the cut edge remains suspended, and the first segment (e.g., the vertical segment) remains intact.

[0027] According to a second aspect, a wind turbine rotor blade for a wind turbine is disclosed. The wind turbine rotor blade includes a root portion and a rain deflector according to any one of the preceding claims, wherein the rain deflector is arranged on the outer surface of the wind turbine rotor blade such that the rain deflector surrounds the root portion.

[0028] Wind turbine rotor blades are generally capable of achieving the aforementioned functions and advantages. Since wind turbine rotor blades include the rain deflector as described in the first aspect, all disclosed embodiments related to the rain deflector are also disclosed for wind turbine rotor blades, and vice versa.

[0029] According to one embodiment, the linear profile includes a foot section from which a sealing lip protrudes. The foot section has a first groove and a second groove. The first groove accommodates a first tensioning device. The second groove accommodates a second tensioning device. The tensioning devices are configured to clamp the deflector to the rotor blades. This contributes to the aforementioned functions and advantages. In particular, by using more than one tensioning device, no material bonding or fastening devices such as screws or the like are required, thus protecting the outer surface of the root portion from impact.

[0030] According to one embodiment, each tensioning device includes a belt, particularly a metal belt, housed in a corresponding groove, wherein the two ends of the belt are connected to each other by an adjusting device for setting a tension force used to secure the deflector to the root of the rotor blades. This contributes to the aforementioned functions and advantages.

[0031] According to the embodiment, the opposite longitudinal ends of the linear profile member are connected by a connecting plate. Refer to the above explanation.

[0032] According to one embodiment, the connecting plate is made of the same material as the linear profile member. Therefore, the connecting plate advantageously possesses the same material properties (chemical, physical, durability) as the linear profile member, and the aging of this component or material occurs in the same manner as the linear profile member. Alternatively, an adhesive film can be used to connect opposing longitudinal ends by filling the space between them. Using this embodiment, the installation process is faster and easier.

[0033] According to the embodiment, any gaps between the longitudinal ends of the linear profile members and / or any gaps between the longitudinal ends of the linear profile members and the connecting plate are filled with an adhesive or silicone material. This ensures ideal sealing performance because harmful substances such as water cannot penetrate into the rotor hub or rotator through the deflector. Attached Figure Description

[0034] Other advantages, features, and functions are set forth in the following exemplary embodiments of the invention, in conjunction with the accompanying drawings. Elements with the same, similar, or analogous functions are provided with the same reference numerals in the drawings.

[0035] In the attached diagram:

[0036] Figure 1 A schematic diagram of a wind turbine is shown.

[0037] Figure 2 A schematic diagram of the rotor hub of a wind turbine is shown.

[0038] Figure 3 A schematic diagram of the rotor hub rotator and the wind turbine rotor blades is shown.

[0039] Figure 4 A schematic diagram of a wind turbine rotor blade with a rain deflector, viewed from the root tip, is shown.

[0040] Figure 5 A cross-sectional view of the rain deflector is shown.

[0041] Figure 6 A schematic diagram showing the interconnected longitudinal ends of the rain deflectors is shown, and

[0042] Figure 7 A schematic partial perspective view of the rotor blades and two tensioning devices is shown. Detailed Implementation

[0043] Figure 1A schematic diagram is shown including a wind turbine 100, which includes a tower 102. The tower 102 is fixed to the ground by means of a base 104. A nacelle 106 is rotatably mounted at one end of the tower 102 opposite to the ground. The nacelle 106 includes, for example, a generator connected to a rotor 108 via a rotor shaft (not shown). The rotor 108 includes one or more rotor blades 110 arranged on a rotor hub 112.

[0044] During operation, rotor 108 is configured to rotate via an airflow, such as wind. This rotational motion is transmitted to a generator via the rotor shaft and, if necessary, via a gearbox. The generator converts the mechanical energy of rotor 108 into electrical energy.

[0045] Each rotor blade 110 includes a root portion 114, which is the portion closest to the rotor hub 112.

[0046] Figure 2 A schematic diagram of the rotor hub 112 and nacelle 106 of a wind turbine 100 is shown. The rotor hub 112 includes a hub body 116, to which a rotator 118 is attached. The rotator 118 is a cover for the hub body 116. The hub body 116 is the main structural component of the rotor hub 112 and is the component to which the rotor blades 110 are attached. The hub body 116 is connected to the main rotor shaft (not shown) of the wind turbine 100. Figure 2 Only one rotor blade is shown schematically in the diagram. The positional relationship between the hub body 116, the rotator 118, and the rotor blade 110 can be deduced by way of example.

[0047] Rotor 118 is an aerodynamic fairing, typically a composite plastic structure, that protects the hydraulic and electrical systems (not shown) housed within hub body 116 from external environmental impacts. As can be seen, hub body 116 includes blade connectors 122 for each rotor blade 110. Each blade connector 122 includes a blade bearing (not shown), typically having a circular flange to which the root portion 114 of the corresponding rotor blade 110 is attached. A pitch system (not shown) is housed within hub body 116 and is used to rotate the pitch bearings, and thus the rotor blades 110 about their longitudinal axis 120. This arrangement is typical in wind turbine design and will therefore not be described in further detail here for the sake of brevity.

[0048] Figure 3A partial perspective view of an exemplary rotator 118 is shown. One of the rotor blades 110 is indicated by a dashed line. As can be seen in this view, the blade 110 extends laterally from the rotator 118 through one of the three rotor blade openings 124, which are also referred to as rotor blade apertures.

[0049] To achieve sufficient clearance for the blade 110 to pitch about its longitudinal axis 120, the blade opening 124 of the rotator 118 defines a circumferential clearance 126 around the blade root portion 114. However, for example during wet weather, this clearance 126 is an inlet gate through which water can enter the interior of the rotator 118 and thus reach or enter the rotor hub 112.

[0050] Hereinafter, a rain deflector 200 according to an embodiment of the present invention will be described. The rain deflector 200 is configured to be mounted on the root portion 114 of the rotor blades 110 to generally protect the rotor hub 112 from water ingress. Figures 4 to 7 The rain deflector 200 is described in more detail.

[0051] Figure 4 A schematic diagram is shown of the root portion 114 of a wind turbine rotor blade 110 along a direction toward the tip 128 of the rotor blade 110. A rain deflector 200 is placed on the outer surface 130 of the root portion 114 of the wind turbine rotor blade 110. The rain deflector 200 includes a linear profile member 202 formed as a single piece (see...). Figure 5 The rain deflector 200 is placed on the outer surface 130 such that the linear profile 202 surrounds the root portion 114 to form a ring 201. The linear profile 202 is described in more detail below.

[0052] Figure 5 The rain deflector is shown along cross section AA (see Figure 1). Figure 4 A cross-sectional view of the linear profile 202. The linear profile 202 is made of an elastomeric material such as ethylene propylene diene monomer rubber. The linear profile 202 includes a foot section 204 from which a sealing lip 206 protrudes. The foot section 204 includes a mounting surface 208 located at the bottom of the rain deflector 200. Through the foot section 204 and particularly through the mounting surface 208, the linear profile 202 rests directly on the outer surface 130 of the root portion 114. To form a closed ring 201 (see... Figure 4The opposing longitudinal ends 203 of the linear profile 202 are fixedly connected by a connecting plate 205. The connecting plate 205 is made of the same material as the linear profile 202. Here, the connecting plate 205 is screwed onto the longitudinal ends 203 of the linear profile 202 by means of four screws to form a closed loop 201. Any remaining gaps between the longitudinal ends 203 of the linear profile 202 and between the longitudinal ends 203 and the connecting plate 205 are filled with a sealing material 207, such as silicone (see [link to documentation]). Figure 6 ).

[0053] The sealing lip 206 has a first segment 210 that, in this example, protrudes from the foot segment 204 along a vertical direction 212. Alternatively, the first segment 210 may also be at an angle relative to the foot segment 204, for example, between 0° and 35°. The vertical direction 212 is intended to be orthogonal to the longitudinal direction 120 of the rotor blade 110. The sealing lip 206 also has a second segment 214 that extends from the first segment 210 and is inclined relative to the first segment 214 at a predetermined angle 216 (e.g., 45°).

[0054] As from Figure 5 As can be seen, the first segment 210 has a cross section 218 (or wall thickness) that tapers in the direction toward the outer end portion 220 (also referred to as the free end) of the sealing lip 206. However, in the example shown, the second segment 214 includes a cross section 222 (or wall thickness) with a constant thickness in the direction toward the outer end portion 220 of the sealing lip 206.

[0055] Furthermore, the support leg section 204 has a first groove 224 and a second groove 226. The two grooves 224 and 226 are arranged on opposite sides of the sealing lip 206. The first groove 224 is designed to receive a first tensioning device 228, and the second groove 226 is designed to receive a second tensioning device 230 (see also...). Figure 7 (Partial exploded view). Tensioning devices 228 and 230 are configured to clamp the deflector 200 onto the rotor blade 110, as already described above. Each tensioning device 228, 230 is primarily defined by a metal strip, which is received in corresponding grooves 224, 226 (see [reference]). Figure 5 , Figure 7 (Not shown in the image). The opposite ends 232 of each metal strip are connected to each other by an adjusting device 234 for setting a tension force that secures the rain deflector 200 to the root portion 114. For example, the adjusting device 234 includes a worm gear thread, wherein the ends 232 are screwed together such that the corresponding metal strip is tied around the root portion 114.

[0056] As from Figure 5It can also be seen that in the region of each of the grooves 224 and 226, the leg section 204 has a groove-shaped recess 236 that extends at least partially below the corresponding groove 224 or 226 in a lateral direction away from the sealing lip 206. In other words, a slit exists below the corresponding groove 224 or 226. The groove-shaped recess 236 extends in a direction along (parallel to) the mounting surface 208 of the leg section 204 (or the corresponding linear profile 202).

[0057] from Figure 5 It can also be seen how the sealing contact between the rain deflector 200 and the corresponding sealing portion is established. If the sealing lip 206 makes sealing contact with another component of the rotator or rotor hub 112 due to the special linear profile 202 as described above, the cover portion 23, which is part of the sealing lip 206 (particularly part of the second segment 214), bends at an angle 217 in the opposite direction to the inclination of the second segment 214 relative to the first segment 210. Angle 217 is a complementary angle to angle 216. The cover portion 238 in Figure 5 The dashed lines indicate the state in which there is a sealed contact with another component, such as the rotator or rotor hub 112, corresponding to the sealing part (not shown).

[0058] The height and thickness of the first section 210 depend on the height H at which it overlaps with the corresponding sealing portion (see...). Figure 5 ).

[0059] The second (inclined) segment 214 is directly used to overlap with the corresponding sealing portion. The inclination angle of the second segment 214 relative to the first segment 210 is 45°. Furthermore, the total length of the sealing lip 206 depends on the length L of the covering portion 238 (see...). Figure 5 Furthermore, the covering portion 238 and its length L also depend on the linear profile 202, which can be in the direction X (see...). Figure 5 The degree of proximity between the upper and lower sealing parts.

[0060] Figure Labels

[0061] 100 wind turbine

[0062] 102 towers

[0063] 104 bases

[0064] Cabin 106

[0065] 108 rotor

[0066] 110 wind turbine rotor blades

[0067] 112 rotor hub

[0068] 114 Root section

[0069] 116 hub body

[0070] 118 Rotor

[0071] 120 longitudinal axis

[0072] 122 blade connector

[0073] 124 blade opening

[0074] 126 circumferential clearance

[0075] 128 tip

[0076] 130 outer surface

[0077] 200 Rain Deflector

[0078] 201 Ring-shaped component

[0079] 202 Linear Profile Part

[0080] 203 Longitudinal End

[0081] 204 foot sections

[0082] 205 connecting plate

[0083] 206 sealing lip edge

[0084] 207 sealing material

[0085] 208 Assembly Surface

[0086] 210 Part 1

[0087] 212 Vertical direction

[0088] 214 Part Two

[0089] 216 angle

[0090] 217 angle

[0091] 218 cross section

[0092] 220 outer end

[0093] 222 cross section

[0094] 224 First Groove

[0095] 226 Second Groove

[0096] 228 First tensioning device

[0097] 230 Second tensioning device

[0098] 232 end

[0099] 234 Adjustment Device

[0100] 236 groove-shaped recess

[0101] 238 Coverage Area

[0102] H height

[0103] L length

[0104] X direction

Claims

1. A rain deflector (200) for a wind turbine rotor blade (110), wherein - The rain deflector (200) includes a linear profile (202) formed into a single piece, the linear profile (202) being made of an elastomeric material. - The rain deflector (200) is configured to be placed on the outer surface (130) of the wind turbine rotor blade (110) such that the linear profile (202) surrounds the root portion (114) of the wind turbine rotor blade (110).

2. The rain deflector (200) according to claim 1, wherein, In order to form a ring (201) around the root portion (114), the opposite longitudinal ends (203) of the linear profile (202) can be connected by a connecting plate (205).

3. The rain deflector (200) according to any one of the preceding claims, wherein, The linear profile (202) includes a foot section (204) from which a sealing lip (206) protrudes, wherein the foot section (204) is configured to rest directly on the outer surface (130) of the root portion (114).

4. The rain deflector (200) according to claim 3, wherein, The sealing lip (206) has a cross section (218) that is at least partially tapered along the direction toward the outer end (220) of the sealing lip (206).

5. The rain deflector (200) according to claim 3 or 4, wherein, The sealing lip (206) has a first section (210) that protrudes vertically from the support leg section (204).

6. The rain deflector (200) according to claim 5, wherein, The first segment (204) has a cross section (218) that tapers toward the outer end (220) of the sealing lip (206).

7. The rain deflector (200) according to claim 5 or 6, wherein, The sealing lip (206) has a second segment (214) that extends from the first segment (210) and is inclined at a predetermined angle (216) relative to the first segment (210).

8. The rain deflector (200) according to claim 7, wherein, The second segment (214) includes a cross section (222) having a constant thickness along the direction toward the outer end portion (220) of the sealing lip (206).

9. The rain deflector (200) according to any one of claims 3 to 8, wherein, The support leg section (200) has a first groove (224) and a second groove (226), the first groove (224) being designed to receive a first tensioning device (228) and the second groove (226) being designed to receive a second tensioning device (230), wherein the tensioning devices (228, 230) are configured to clamp the rain deflector (200) onto the rotor blade (110).

10. The rain deflector (200) according to claim 9, wherein, The two grooves (224, 226) are arranged on opposite sides of the sealing lip (206).

11. The rain deflector (200) according to claim 9 or 10, wherein, In the region of at least one recess (224, 226), the leg segment (204) has a groove-shaped recess (236) that extends at least partially below the at least one recess (224, 226) in a direction away from the sealing lip (206).

12. A wind turbine rotor blade (110) for a wind turbine (100), said wind turbine rotor blade (110) comprising a root portion (114) and a rain deflector (200) according to any one of the preceding claims, wherein, The rain deflector (200) is arranged on the outer surface (130) of the wind turbine rotor blade (110) such that the rain deflector (200) surrounds the root portion (114).

13. The wind turbine rotor blade (110) according to claim 12, wherein... - The linear profile member (202) includes a foot section (204) from which a sealing lip (206) protrudes. - The support leg section (204) has a first groove (224) and a second groove (226). - The first groove (224) accommodates the first tensioning device (228), and the second groove (226) accommodates the second tensioning device (230), and - The tensioning device (228, 230) is configured to clamp the rain deflector (200) onto the rotor blade (110).

14. The wind turbine rotor blade (110) according to any one of claims 12 to 13, wherein, Each tensioning device (228, 230) includes a belt, particularly a metal belt, housed in a corresponding groove (224, 226), wherein the two ends (232) of the belt are connected to each other by an adjusting device (234) for setting a tension force for securing the rain deflector (200) to the root portion (114).

15. The wind turbine rotor blade (110) according to any one of claims 12 to 14, wherein, The opposite longitudinal ends (203) of the linear profile member (202) are connected by a connecting plate (205).

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