An automatic blade locking device for a wind turbine

Abstract

This invention discloses an automatic blade locking device for wind turbine generators, comprising a rotating assembly including a hub and blades, a mounting assembly disposed on one side of the rotating assembly including a nacelle and a base, and a braking assembly disposed inside the mounting assembly including a brake disc, friction components, and a warning component. The device of this invention, with the rotating assembly, mounting assembly, and braking assembly working together, can remotely control the braking and blade locking of the high-speed shaft under special circumstances such as typhoons, reducing maintenance workload and improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to an automatic blade locking device for wind turbine generator sets. Background Technology

[0002] For wind turbines located in coastal areas affected by typhoons, the blades must be locked in the feathering position to ensure the safety of the turbines during typhoons. To reduce maintenance workload and improve efficiency, the blade locking device needs to have remote control functionality, allowing for remote manual locking and unlocking of the blades. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the above and / or existing wind turbine blade locking devices, the present invention is proposed.

[0005] Therefore, the problem to be solved by this invention is how to quickly lock and unlock wind turbine blades.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic blade locking device for wind turbine generator sets, comprising a rotating component, a mounting component, and a braking component.

[0007] As a preferred embodiment of the automatic blade locking device for wind turbine generator set of the present invention, the rotating component includes a hub and blades, wherein the blades are disposed on one side of the hub;

[0008] A mounting assembly, disposed on one side of the rotating assembly, includes a cabin and a base, the cabin being disposed on one side of the wheel hub, and the base being disposed at the bottom of the cabin; and...

[0009] A braking assembly, disposed inside the mounting assembly, includes a brake disc, a friction element, and a warning element. The brake disc is disposed inside the engine compartment, the friction element is disposed on one side of the brake disc, and the warning element is disposed on the side of the friction element.

[0010] As a preferred embodiment of the automatic blade locking device for wind turbine generators of the present invention, the hub includes blade openings and nacelle openings, there are three blade openings arranged around the cylindrical surface of the hub, and the nacelle opening is located on one side of the bottom surface of the hub.

[0011] As a preferred embodiment of the automatic blade locking device for wind turbine generator sets according to the present invention, there are three blades, one end of the blade is connected to the blade inlet bearing, and one side of the nacelle is connected to the nacelle inlet bearing.

[0012] As a preferred embodiment of the automatic blade locking device for wind turbine generator sets according to the present invention, the rotating assembly further includes a push rod and a hook plate. The push rod is disposed on one side inside the blade opening, and the hook plate is disposed on one end of the blade. The hook plate includes hook teeth and a fixing hole. The hook teeth are fixedly connected to the inner wall of one end of the blade, and the fixing hole cooperates with the push rod.

[0013] As a preferred embodiment of the automatic blade locking device for wind turbine generator sets according to the present invention, the push rod includes a hydraulic base and a push rod. The hydraulic base is disposed inside one side of the blade opening, and the push rod is disposed on the top of the hydraulic base. The push rod and the fixing hole of the hook plate are engaged.

[0014] As a preferred embodiment of the automatic blade locking device for wind turbine generator sets according to the present invention, the mounting assembly further includes a low-speed shaft and a gearbox, one end of the low-speed shaft is fixedly connected to the hub, and the other end is connected to the gearbox.

[0015] As a preferred embodiment of the automatic blade locking device for wind turbine generator sets according to the present invention, the mounting assembly further includes a high-speed shaft and a generator, one end of the high-speed shaft is connected to the gearbox, and the other end is connected to the generator.

[0016] In a preferred embodiment of the automatic blade locking device for wind turbine generator sets described in this invention, one end of the generator is fixedly connected to the inner wall of the nacelle.

[0017] As a preferred embodiment of the automatic blade locking device for wind turbine generator sets according to the present invention, the brake disc is sleeved on the outer wall of the high-speed shaft center, and there are two friction components disposed on both sides of the brake disc. The friction components include a friction pad and a hydraulic rod, one end of the hydraulic rod is connected to the friction pad, and the other end is connected to the inner wall of the nacelle.

[0018] In a preferred embodiment of the automatic blade locking device for wind turbine generator sets according to the present invention, the warning component includes a fixing component, a driving component, and a contact component. The fixing component is disposed on one side of the friction plate, the driving component is disposed at the center of the fixing component, and the contact component is disposed on one side of the driving component.

[0019] The beneficial effects of this invention are: with the cooperation of the rotating component, the mounting component and the braking component, the braking and blade locking of the high-speed shaft can be remotely controlled during special circumstances such as typhoons, reducing the workload of operation and maintenance and improving work efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a structural diagram of the automatic blade locking device for wind turbine generator sets.

[0022] Figure 2 This is a diagram of the internal structure of the automatic blade locking device for a wind turbine generator set.

[0023] Figure 3 This is a structural diagram of the rotating assembly of the automatic blade locking device for wind turbine generators.

[0024] Figure 4 This is a structural diagram of the early warning component of the automatic blade locking device for wind turbine generators.

[0025] Figure 5 This is a structural diagram of the drive components and contact components of the automatic blade locking device for wind turbine generators. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figures 1-3 This is the first embodiment of the present invention, which provides an automatic blade locking device for a wind turbine generator set, comprising a rotating assembly 100, a mounting assembly 200, and a braking assembly 300.

[0031] Specifically, the rotating assembly 100 includes a hub 101 and a blade 102, with the blade 102 disposed on one side of the hub 101.

[0032] When unlocked, blade 102 rotates under wind force, which in turn drives hub 101 to rotate.

[0033] Specifically, the mounting component 200 is located on one side of the rotating component 100 and includes a nacelle 201 and a base 202. The nacelle 201 is located on one side of the hub 101 and the base 202 is located at the bottom of the nacelle 201.

[0034] The base 202 is a long column with its bottom fixed to the ground, supporting the cabin 201.

[0035] Specifically, the braking assembly 300 is located inside the mounting assembly 200 and includes a brake disc 301, a friction element 302, and a warning element 303. The brake disc 301 is located inside the engine compartment 201, the friction element 302 is located on one side of the brake disc 301, and the warning element 303 is located on the side of the friction element 302.

[0036] The braking assembly 300 is used to stop the rotation of the brake disc 301, and at the same time, it can prevent the brake failure friction component 302 and the brake disc 301 from being in contact for too long, which could lead to overheating of the device and cause an accident.

[0037] Specifically, the hub 101 includes blade openings 101a and nacelle openings 101b. There are three blade openings 101a, which are arranged around the cylindrical surface of the hub 101, and the nacelle openings 101b are located on one side of the bottom surface of the hub 101.

[0038] The hub 101 is driven by the blades 102 to rotate around the axis of the hatch 101b.

[0039] Specifically, there are three blades 102. One end of the blade 102 is connected to the bearing at the blade inlet 101a, and the other side of the nacelle 201 is connected to the bearing at the nacelle inlet 101b.

[0040] The blade 102 can rotate around the axis of the nacelle opening 101b to adjust the angle of attack, etc. When an unexpected event such as a typhoon occurs, the blade 102 can be locked to the hub 101 to improve stability and avoid damage.

[0041] Specifically, the rotating assembly 100 also includes a push rod 103 and a hook plate 104. The push rod 103 is disposed on one side inside the blade opening 101a, and the hook plate 104 is disposed at one end of the blade 102. The hook plate 104 includes hook teeth 104a and fixing holes H1. The hook teeth 104a are fixedly connected to the inner wall of one end of the blade 102, and the fixing holes H1 cooperate with the push rod 103.

[0042] The push rod 103 is used to insert the hook plate 104 after the blade 102 has been adjusted to the correct angle, and to lock the blade 102.

[0043] Specifically, the push rod component 103 includes a hydraulic base 103a and a push rod 103b. The hydraulic base 103a is located inside one side of the blade opening 101a, and the push rod 103b is located on the top of the hydraulic base 103a. The push rod 103b is engaged with the fixing hole H1 of the hook plate 104.

[0044] After the blade 102 is adjusted to the correct angle, the hydraulic base 103a is activated remotely to push out the push rod 103b. The push rod 103b is then inserted into the fixing hole H1 of the hook plate 104 to lock the blade.

[0045] Specifically, the mounting assembly 200 also includes a low-speed shaft 203 and a gearbox 204. One end of the low-speed shaft 203 is fixedly connected to the hub 101, and the other end is connected to the gearbox 204.

[0046] When the hub 101 rotates, it drives the low-speed shaft 203 to rotate.

[0047] Specifically, the mounting assembly 200 also includes a high-speed shaft 205 and a generator 206. One end of the high-speed shaft 205 is connected to the gearbox 204, and the other end is connected to the generator 206.

[0048] The rotation of the low-speed shaft 203 drives the high-speed shaft 205 to rotate through the gearbox 204, and the rotation of the high-speed shaft 205 drives the generator 206 to rotate and generate electricity.

[0049] Specifically, one end of the generator 206 is fixedly connected to the wall.

[0050] The generator 206 is fixed inside the engine room 201.

[0051] When in use and unlocked, blade 102 rotates under wind force, causing hub 101 to rotate. Base 202 is a long column, fixed to the ground at the bottom, supporting nacelle 201. Braking assembly 300 stops brake disc 301 from rotating, preventing overheating and accidents caused by prolonged contact between friction component 302 and brake disc 301 in case of brake failure. Hub 101 rotation drives low-speed shaft 203. Low-speed shaft 203, through gearbox 204, drives high-speed shaft 205, which in turn drives generator 206 to generate electricity. Generator 206 is fixed inside nacelle 201. Hub 101 rotates around nacelle opening 101b axis driven by blade 102. Push rod 103 is used to insert hook plate 104 to lock blade 102 after its angle is adjusted. The blade 102 can rotate around the axis of the nacelle opening 101b to adjust the angle of attack, etc. In the event of an unexpected typhoon or other event, the blade 102 can be locked to the hub 101 to improve stability and avoid damage. After the blade 102 is adjusted to the correct angle, the hydraulic base 103a is activated remotely to push out the push rod 103b. The push rod 103b is inserted into the fixing hole H1 of the hook plate 104 to lock the blade.

[0052] Example 2

[0053] Reference Figures 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0054] Specifically, the brake disc 301 is sleeved on the outer wall of the center of the high-speed shaft 205. There are two friction components 302, which are set on both sides of the brake disc 301. The friction component 302 includes a friction pad 302a and a hydraulic rod 302b. One end of the hydraulic rod 302b is connected to the friction pad 302a, and the other end is connected to the inner wall of the engine compartment 201.

[0055] When braking is required, the hydraulic rod 302b is remotely activated to press the friction pad 302a onto the brake disc 301, causing the brake disc 301 to stop.

[0056] Specifically, the warning component 303 includes a fixing component 303a, a driving component 303b, and a contact component 303c. The fixing component 303a is disposed on one side of the friction plate 302a, the driving component 303b is disposed at the center of the fixing component 303a, and the contact component 303c is disposed on one side of the driving component 303b.

[0057] The fastener 303a has a fastening claw 303a-1 on its side, which is used to fix it to the side of the friction plate 302a.

[0058] The driving component 303b includes a driving shaft 303b-1, a driving spring 303b-2, and a driving wheel 303b-3. The driving shaft 303b-1 is vertically inserted through and rotatably connected to the fixing component 303a. The driving spring 303b-2 is sleeved on the driving shaft 303b-1, and its two ends are respectively connected to the fixing component 303a and the middle protrusion of one end of the driving shaft 303b-1. The driving wheel 303b-3 is located at one end of the driving shaft 303b-1.

[0059] Contact element 303c includes steering element 303c-1 and monitoring element 303c-2. Steering element 303c-1 includes worm gear 303c-11, worm wheel 303c-12, steering shaft 303c-13, and friction shaft 303c-14. One end of worm gear 303c-11 is fixedly connected to the center of drive wheel 303b-3, and the other end mates with worm wheel 303c-12. One end of steering shaft 303c-13 is vertically inserted through rotatably connected fixing element 303a, and worm wheel 303c-12 is rotatably connected to the center of the other end of steering shaft 303c-13. One end of friction shaft 303c-14 is fixedly connected to the center of worm wheel 303c-12, the middle of friction shaft 303c-14 penetrates the side of steering shaft 303c-13, and the other end of friction shaft 303c-14 mates with monitoring element 303c-2.

[0060] The monitoring component 303c-2 includes a monitoring shaft 303c-21, a monitoring spring 303c-22, a heat-conducting component 303c-23, and a temperature sensor 303c-24. One end of the monitoring shaft 303c-21 is vertically connected to the fixing component 303a. The monitoring spring 303c-22 is sleeved on the monitoring shaft 303c-21. The monitoring spring 303c-22 and the drive spring 303b-2 are respectively located on both sides of the fixing component 303a. The monitoring shaft 303c-21 has a long groove. The friction shaft 303c-14 and one side of the inner wall of the long groove of the monitoring shaft 303c-21 are engaged. The temperature sensor 303c-24 is located at one end of the monitoring shaft 303c-21. The heat-conducting component 303c-23 is located outside the temperature sensor 303c-24.

[0061] The drive shaft 303b-1, steering shaft 303c-13 and monitoring shaft 303c-21 all penetrate the fixing member 303a vertically, and all three shafts can translate along the axial direction.

[0062] The drive spring 303b-2 is located on the side closer to the brake disc 301, and the monitoring spring 303c-22 is located on the side farther away from the brake disc 301. By default, the drive spring 303b-2 will cause the drive wheel 303b-3 to move closer to the brake disc 301, and the monitoring spring 303c-22 will cause the heat-conducting component 303c-23 to move away from the brake disc 301.

[0063] When in use and unlocked, blade 102 rotates under wind force, causing hub 101 to rotate. Base 202 is a long column, fixed to the ground at the bottom, supporting nacelle 201. Braking assembly 300 stops brake disc 301 from rotating, preventing overheating and accidents caused by prolonged contact between friction component 302 and brake disc 301 in case of brake failure. Hub 101 rotation drives low-speed shaft 203. Low-speed shaft 203, through gearbox 204, drives high-speed shaft 205, which in turn drives generator 206 to generate electricity. Generator 206 is fixed inside nacelle 201. Hub 101 rotates around nacelle opening 101b axis driven by blade 102. Push rod 103 is used to insert hook plate 104 to lock blade 102 after its angle is adjusted. The blade 102 can rotate around the axis of the nacelle opening 101b to adjust the angle of attack, etc. In the event of an unexpected typhoon or other event, the blade 102 can be locked to the hub 101 to improve stability and avoid damage. After the blade 102 is adjusted to the correct angle, the hydraulic base 103a is activated remotely to push out the push rod 103b. The push rod 103b is inserted into the fixing hole H1 of the hook plate 104 to lock the blade.

[0064] Before locking the blade 102, the blade 102 needs to come to a complete stop, that is, the brake disc 301 needs to be stopped by the friction pad 302a. In order to avoid accidents such as brake failure due to accidents or overheating of the brake assembly 300 due to excessive braking time, a warning device should be installed on the brake assembly 300.

[0065] During braking, the friction pad 302a approaches the brake disc 301. At this time, the drive wheel 303b-3 approaches the brake disc 301 and compresses the drive spring 303b-2. The drive wheel 303b-3 is driven to rotate by the brake disc 301, thus transmitting force to the friction shaft 303c-14 through the worm gear 303c-11 and worm wheel 303c-12. The friction shaft 303c-14 rotates on one side of the inner wall of the long groove of the monitoring shaft 303c-21, causing the monitoring shaft 303c-21 to approach the brake disc 301. The heat-conducting component 303c-23 contacts the brake disc 301 and transfers the temperature to the temperature sensor 303c-24. When the friction force of the friction shaft 303c-14 on the inner wall of the long groove of the monitoring shaft 303c-21 is equal to the sum of the elastic force of the monitoring spring 303c-22 and the force of the brake disc 301 pushing the heat-conducting component 303c-23, the temperature sensor 303c-24 can continuously monitor the temperature. When the braking time is too long and the temperature of the brake disc 301 is too high, the temperature sensor 303c-24 will trigger an alarm.

[0066] The heat-conducting component 303c-23 is used to transfer temperature while preventing the temperature sensor 303c-24 from being rubbed. The braking assembly 300 only starts monitoring the temperature after a period of time after braking. The specific time is determined by the transmission ratio of the worm gear 303c-11 and the worm wheel 303c-12, plus the friction coefficient in the long groove of the friction shaft 303c-14 and the monitoring shaft 303c-21. This avoids monitoring and wearing out the heat-conducting component 303c-23 with each braking, thus improving the service life of the device.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic blade locking device for wind turbine generator sets, characterized in that: include, A rotating assembly (100) includes a hub (101) and blades (102), the blades (102) being disposed on one side of the hub (101); Mounting assembly (200), disposed on one side of the rotating assembly (100), includes a nacelle (201) and a base (202), the nacelle (201) being disposed on one side of the hub (101), and the base (202) being disposed at the bottom of the nacelle (201); and, A braking assembly (300) is disposed inside the mounting assembly (200) and includes a brake disc (301), a friction element (302), and a warning element (303). The brake disc (301) is disposed inside the engine compartment (201), the friction element (302) is disposed on one side of the brake disc (301), and the warning element (303) is disposed on the side of the friction element (302). The warning component (303) includes a fixing component (303a), a driving component (303b), and a contact component (303c). The driving component (303b) includes a driving shaft (303b-1), a driving spring (303b-2), and a driving wheel (303b-3). The driving shaft (303b-1) passes vertically through the rotatable connecting fixture (303a). The driving spring (303b-2) is sleeved on the driving shaft (303b-1) and its two ends are respectively connected to the fixture (303a) and the protruding part in the middle of one end of the driving shaft (303b-1). The driving wheel (303b-3) is located at one end of the driving shaft (303b-1). The contact element (303c) includes a steering element (303c-1) and a monitoring element (303c-2). The steering element (303c-1) includes a worm (303c-11), a worm wheel (303c-12), a steering shaft (303c-13), and a friction shaft (303c-14). One end of the worm (303c-11) is fixedly connected to the center of the drive wheel (303b-3), and the other end mates with the worm wheel (303c-12). The steering shaft (303c-13)... One end of the 3c-13 is vertically connected to the rotating fastener (303a) through the worm gear (303c-12) and the steering shaft (303c-13) through the center; one end of the friction shaft (303c-14) is fixedly connected to the center of the worm gear (303c-12), the middle of the friction shaft (303c-14) penetrates the side of the steering shaft (303c-13), and the other end of the friction shaft (303c-14) is engaged with the monitoring component (303c-2); The monitoring component (303c-2) includes a monitoring shaft (303c-21), a monitoring spring (303c-22), a heat-conducting component (303c-23), and a temperature sensor (303c-24). One end of the monitoring shaft (303c-21) is vertically connected to the fixing component (303a). The monitoring spring (303c-22) is sleeved on the monitoring shaft (303c-21). The monitoring spring (303c-22) and the drive spring (303b-2) are respectively located on both sides of the fixing component (303a). The monitoring shaft (303c-21) has a long groove. The friction shaft (303c-14) and one side of the inner wall of the long groove of the monitoring shaft (303c-21) are engaged. The temperature sensor (303c-24) is located at one end of the monitoring shaft (303c-21), and the heat-conducting component (303c-23) is located outside the temperature sensor (303c-24).

2. The automatic blade locking device for wind turbine generator sets as described in claim 1, characterized in that: The hub (101) includes a blade opening (101a) and a nacelle opening (101b). There are three blade openings (101a) arranged around the cylindrical surface of the hub (101), and the nacelle opening (101b) is located on one side of the bottom surface of the hub (101).

3. The automatic blade locking device for wind turbine generator sets as described in claim 2, characterized in that: There are three blades (102). One end of the blade (102) is connected to the blade opening (101a) bearing, and one side of the nacelle (201) is connected to the nacelle opening (101b) bearing.

4. The automatic blade locking device for wind turbine generator sets as described in claim 3, characterized in that: The rotating assembly (100) further includes a push rod (103) and a hook plate (104). The push rod (103) is disposed on one side inside the blade opening (101a), and the hook plate (104) is disposed at one end of the blade (102). The hook plate (104) includes hook teeth (104a) and fixing holes (H1). The hook teeth (104a) are fixedly connected to the inner wall of one end of the blade (102), and the fixing holes (H1) cooperate with the push rod (103).

5. The automatic blade locking device for wind turbine generator sets as described in claim 4, characterized in that: The push rod component (103) includes a hydraulic base (103a) and a push rod (103b). The hydraulic base (103a) is disposed inside one side of the blade opening (101a), and the push rod (103b) is disposed on the top of the hydraulic base (103a). The push rod (103b) and the fixing hole (H1) of the hook plate (104) are engaged.

6. The automatic blade locking device for wind turbine generator sets as described in claim 4 or 5, characterized in that: The mounting assembly (200) also includes a low-speed shaft (203) and a gearbox (204). One end of the low-speed shaft (203) is fixedly connected to the hub (101), and the other end is connected to the gearbox (204).

7. The automatic blade locking device for wind turbine generator sets as described in claim 6, characterized in that: The mounting assembly (200) also includes a high-speed shaft (205) and a generator (206), one end of which is connected to the gearbox (204) and the other end of which is connected to the generator (206).

8. The automatic blade locking device for wind turbine generator sets as described in claim 7, characterized in that: One end of the generator (206) is fixedly connected to the inner wall of the nacelle (201).

9. The automatic blade locking device for wind turbine generator sets as described in claim 7 or 8, characterized in that: The brake disc (301) is sleeved on the outer wall of the center of the high-speed shaft (205). There are two friction components (302) on both sides of the brake disc (301). The friction component (302) includes a friction pad (302a) and a hydraulic rod (302b). One end of the hydraulic rod (302b) is connected to the friction pad (302a), and the other end is connected to the inner wall of the engine compartment (201).

10. The automatic blade locking device for wind turbine generator sets as described in claim 9, characterized in that: The fixing member (303a) is disposed on one side of the friction plate (302a), the driving member (303b) is disposed at the center of the fixing member (303a), and the contact member (303c) is disposed on one side of the driving member (303b).

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