Fan manual pitch changing reminding device and wind turbine generator system

Abstract

The utility model relates to the technical field of wind power generation discloses a fan manual variable pitch reminding device and wind generating set. The utility model provides fan manual variable pitch reminding device, through the accumulated number of inside and outside trigger signal statistics door is compared, accurate judgment personnel whether has left the hub cabin completely, avoids the major risk of false start variable pitch operation because of personnel in the hub, simultaneously, through the combination of physical trigger mechanism (inside and outside handle) and electronic detection unit, replaces voice transmission with mechanical action, changes subjective hearing order response into objective action, signal, judgment closed loop process, forces operating personnel to complete the access confirmation according to the procedure, reduces the safety accident caused by artificial misjudgment, arbitrary operation or unclear communication, avoids the influence of environmental noise on signal, ensures the stability and accuracy of trigger signal.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a wind turbine manual pitch reminder device and a wind turbine generator set. Background Technology

[0002] Wind power generation, as a crucial component of clean energy, boasts significant advantages such as low carbon emissions, environmental friendliness, renewable resources, and sustainable utilization. The hub is a core component of wind turbines, undertaking critical functions in blade pitch control and energy transfer. Its complex structure and high maintenance requirements make it particularly challenging. During the daily operation and maintenance of wind turbines, work inside the hub is a frequent occurrence, including manual pitch control, bolt torque calibration, and sensor debugging. However, the confined space and complex structure within the hub, along with rotating components and hydraulic / electric drive systems, place higher demands on the safety management of personnel and the reliability of equipment operation.

[0003] Manual pitch control is a common requirement in wind turbine maintenance and troubleshooting. According to existing technical specifications, before pitch control operations, it is essential to ensure all personnel inside the hub are in a safe position and implement physical isolation measures (e.g., manual pitch control inside the hub nacelle requires locking the hub, while manual pitch control outside the nacelle does not require locking the hub or disconnecting the power supply). Currently, operators typically instruct personnel inside the hub to cease activity and evacuate to a safe area via verbal communication, while also relying on on-site supervisors to visually confirm the personnel distribution.

[0004] However, due to the large internal space and complex structure of the wheel hub, sound propagation is easily interfered with by equipment noise (such as the operation of electric pumps and hydraulic stations), making it impossible for announcements to be clearly transmitted to all workers, or even completely masked. Secondly, workers inside the wheel hub, due to wearing protective equipment (such as ear protection) or focusing on the current task, may not respond to announcements in a timely manner, leading to misjudgments or omissions. This results in significant safety hazards. Utility Model Content

[0005] In view of this, the present invention provides a wind turbine manual pitch reminder device and a wind turbine generator set to solve the problem that manual pitch operation may pose safety hazards due to manual announcements.

[0006] Firstly, the wind turbine manual pitch reminder device provided by this utility model includes an in-door triggering mechanism, an out-of-door triggering mechanism, and a control terminal. The in-door triggering mechanism is located inside the hub door and includes an operable first handle and a first detection unit for detecting whether the first handle has moved to a first preset position. The out-of-door triggering mechanism is located outside the hub door and includes an operable second handle and a second detection unit for detecting whether the second handle has moved to a second preset position. The control terminal is signal-connected to the first and second detection units and is used to receive and count the first trigger signal from the first detection unit and the second trigger signal from the second detection unit, respectively. The control terminal is configured to compare the cumulative number of times the second trigger signal is counted with the cumulative number of times the first trigger signal is counted, and output the comparison result. Specifically, when the cumulative number of times the second trigger signal is counted is greater than the cumulative number of times the first trigger signal is counted, the control terminal outputs a standby signal to prohibit the wind turbine from performing manual pitch operation; when the cumulative number of times the second trigger signal is counted is equal to the cumulative number of times the first trigger signal is counted, the control terminal outputs a pitch signal for the wind turbine to perform manual pitch operation.

[0007] Beneficial Effects: By statistically analyzing and comparing the cumulative number of trigger signals inside and outside the hub, the system accurately determines whether all personnel have left the hub, avoiding the significant risk of accidentally initiating pitch control due to personnel remaining inside. For example, if the number of external triggers exceeds the number of internal triggers (e.g., personnel inside the hub have not responded in time), the control terminal immediately outputs a standby signal, prohibiting manual pitch control and effectively preventing mechanical injuries caused by personnel not responding to commands. Pitch control is only permitted when the number of internal and external triggers is equal, ensuring that high-risk actions are only performed after confirming that no one is inside the hub, completely eliminating safety hazards caused by personnel not evacuating or being distracted. Simultaneously, the combination of physical triggering mechanisms (internal and external handles) and electronic detection units replaces voice transmission with mechanical action, transforming subjective command responses into an objective closed-loop process of action, signal, and judgment. This forces operators to complete entry and exit confirmations step-by-step, reducing safety accidents caused by human error, arbitrary operation, or unclear communication, avoiding the impact of environmental noise on signals, and ensuring the stability and accuracy of trigger signals.

[0008] In one alternative embodiment, the wind turbine manual pitch warning device further includes a latch mechanism comprising a latch. The latch is mounted on the bottom inner side of the hub door and configured to insert into a pin hole under its own weight.

[0009] Beneficial effects: The door latch locks itself by inserting into the pin hole under its own gravity, eliminating the need for active mechanisms such as hydraulic, electric, or spring drives. Compared to traditional door locks (such as those requiring electric or manual operation), this design avoids lock malfunctions caused by power failure, circuit faults, or operational errors, ensuring the door remains securely closed when not actively opened. Furthermore, the wheel hub often experiences vibration, temperature variations, and electromagnetic interference, but the gravity-based self-locking mechanism is unaffected by these factors. It maintains stable locking performance even under high vibration, wind, or accidental impacts, preventing the door from loosening due to vibration or accidentally opening.

[0010] In one optional embodiment, the first detection unit has a first detection end along the height direction, and the second detection unit has a second detection end along the height direction; the door pin has a movable chamber inside, the outer side wall of the door pin has a first guide hole communicating with the movable chamber, and the inner side wall of the door pin has a second guide hole communicating with the movable chamber; the vertical distance between the top wall of the first guide hole and the first detection end, and the vertical distance between the top wall of the second guide hole and the second detection end are both greater than the vertical length of the door pin for insertion into the pin hole; the first handle and the second handle are both configured to move upward along the height direction under the action of external force until their execution ends act on the top wall of the corresponding movable groove, thereby driving the door pin to gradually disengage from the pin hole.

[0011] Beneficial effects: By setting the vertical distance between the top wall of the first / second guide hole and the detection end to be greater than the length of the door pin insertion hole, sufficient overtravel is reserved for the upward operation of the first / second handle. When the first / second handle moves to the end of its travel within the guide hole, the continued application of external force can drive the door pin to continue moving until the door pin is completely disengaged from the pin hole. Only then will the handle move to the preset position of the trigger detection unit. This requires the operator to complete the entire unlocking action, avoiding safety hazards such as the door pin not being completely pulled out, the door jamming, or the door being partially closed due to insufficient operating force or stopping halfway. This ensures the integrity and effectiveness of each door operation.

[0012] In one optional embodiment, the door-external triggering mechanism further includes a first connecting rod. The first connecting rod has a first limiting section, a first connecting section, and a transition section. The first limiting section and the first connecting section are respectively installed on the inner and outer sides of the wheel hub door. The first connecting section is connected to the first handle. The transition section is used to connect the first limiting section and the first connecting section, and the transition section is movably installed inside the wheel hub door.

[0013] Beneficial effects: The first limiting section is fixed to the outside of the wheel hub door, the first connecting section is connected to the handle, and the transition section slides through the movable groove. The limiting section and the first connecting section form a two-way physical constraint in the horizontal direction, which not only restricts the lateral displacement of the transition section in the movable groove (preventing jamming caused by vibration or uneven operating force), but also allows it to move freely in the vertical direction (ensuring smooth unlocking of the door pin). This ensures that the transition section always moves smoothly along the preset vertical trajectory, avoiding friction, interference, or even jamming with the edge of the movable groove due to misalignment.

[0014] In one optional embodiment, the door-external triggering mechanism further includes a first elastic element. The first elastic element is sleeved on the first connecting section, and its two ends, which deform elastically, act elastically on the outer wall of the wheel hub door and the first handle, respectively.

[0015] In one optional embodiment, the door-in-the-door triggering mechanism further includes a second connecting rod. The second connecting rod has a second limiting section and a second connecting section. The second limiting section is installed inside the door pin, and the end of the second connecting section connected to the second limiting section is movably installed inside the second guide hole. The end of the second connecting section opposite to the second limiting section extends toward the inside of the door pin for connection with the second handle.

[0016] Beneficial effects: The second limiting section is fixed inside the door pin, and the second connecting section slides through the nesting of the movable groove. At the same time, its extension end is connected to the second handle. This rigid constraint combined with the movable nesting structure design not only restricts the lateral displacement of the second connecting rod in the horizontal direction (preventing jamming caused by vibration or uneven operating force), but also allows it to move freely in the vertical direction (ensuring smooth door pin unlocking).

[0017] In one optional embodiment, the door triggering mechanism further includes a second elastic element. The second elastic element is sleeved on the second connecting section, and its two ends, which deform elastically, act elastically on the inner wall of the door pin and the second handle, respectively.

[0018] In one optional embodiment, the wind turbine manual pitch warning device further includes a protective cover. The protective cover is used to cover the first detection end and the second detection end, and has an opening at its bottom. The first and second detection ends are located inside the protective cover and are arranged close to the opening.

[0019] Beneficial effects: By using a protective cover to physically isolate the first and second detection ends, and placing the first and second detection ends inside the protective cover and close to the opening, the operator can only touch the detection ends when moving the handle upwards. This prevents the operator or external objects (such as handles, tools or foreign objects) from accidentally touching the detection ends, thereby eliminating signal fluctuations or incorrect counting caused by accidental touch.

[0020] Secondly, this utility model also provides a wind turbine generator set, including a hub nacelle, a hub door, and a manual pitch reminder device. The hub nacelle has a hub door hole and a pin hole, the pin hole being located at the bottom inner side of the hub door hole; the top of the hub door is hinged to the top of the hub door hole, and the bottom is installed in the pin hole via a door pin; the manual pitch reminder device is the same as described in the previous aspect, used for installation on the hub door.

[0021] Beneficial effects: Since the wind turbine generator set includes a manual pitch warning device, it has the same effect as the manual pitch warning device, so it will not be elaborated here.

[0022] In one alternative embodiment, the top of the hub door is hinged to the top of the hub door hole.

[0023] Beneficial effects: The hinge design allows the wheel hub door to rotate and open at a large angle with the top as the fulcrum, so that the door can be fully unfolded and close to the top or side wall of the wheel hub door hole, and the wheel hub door hole of the wheel hub compartment can be fully opened. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A side view of the wind turbine manual pitch reminder device provided in this embodiment of the present invention when installed on the hub door; Figure 2 A side view of the wind turbine manual pitch reminder device provided in this embodiment of the present utility model when the second handle is subjected to gravity and abuts against the bottom wall of the second guide hole when it is installed on the hub door; Figure 3 A side view of the second handle moving against its own weight to the top wall of the second guide hole when the wind turbine manual pitch reminder device provided in this embodiment of the utility model is installed on the hub door; Figure 4 A side view of the wind turbine manual pitch reminder device provided in this embodiment of the utility model when the second handle drives the door pin to disengage from the pin hole under the action of external force when the second handle is installed on the hub door; Figure 5 A side view of the first connecting rod in the wind turbine manual pitch reminder device provided in this embodiment of the utility model; Figure 6A side view of the second connecting rod in the wind turbine manual pitch reminder device provided in this embodiment of the utility model; Figure 7 A front view of a wind turbine generator set with the hub door installed in the hub door hole of the hub compartment, provided as an embodiment of this utility model; Figure 8 A front view of a wind turbine generator set with the door pin installed on the hub door via the door pin operating handle, as provided in an embodiment of this utility model. Figure 9 A front view of the gate pin in a wind turbine generator set provided in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures: 1. Door-mounted triggering mechanism; 11. First handle; 12. First detection unit; 121. First detection end; 13. Second connecting rod; 131. Second limiting section; 132. Second connecting section; 14. First elastic element; 2. External triggering mechanism; 21. Second handle; 22. Second detection unit; 221. Second detection end; 23. First connecting rod; 231. First limiting section; 232. First connecting section; 233. Transition section; 24. Second elastic element; 3. Door pin; 301. First guide hole; 4. Protective cover; 5. Wheel hub door; 51. Pin hole; 6. Hinges; 7. Fixing hoop; 8. Door pin operating handle; 91. Wheel hub door hole. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Wind power generation, as a crucial component of clean energy, boasts significant advantages such as low carbon emissions, environmental friendliness, renewable resources, and sustainable utilization. The hub is a core component of wind turbines, undertaking critical functions in blade pitch control and energy transfer. Its complex structure and high maintenance requirements make it particularly challenging. During the daily operation and maintenance of wind turbines, work inside the hub is a frequent occurrence, including manual pitch control, bolt torque calibration, and sensor debugging. However, the confined space and complex structure within the hub, along with rotating components and hydraulic / electric drive systems, place higher demands on the safety management of personnel and the reliability of equipment operation.

[0032] Manual pitch control is a common requirement in wind turbine maintenance and troubleshooting. According to existing technical specifications, before pitch control operations, it is essential to ensure all personnel inside the hub are in a safe position and implement physical isolation measures (e.g., manual pitch control inside the hub nacelle requires locking the hub, while manual pitch control outside the nacelle does not require locking the hub or disconnecting the power supply). Currently, operators typically instruct personnel inside the hub to cease activity and evacuate to a safe area via verbal communication, while also relying on on-site supervisors to visually confirm the personnel distribution.

[0033] However, due to the large internal space and complex structure of the wheel hub, sound propagation is easily interfered with by equipment noise (such as the operation of electric pumps and hydraulic stations), making it impossible for announcements to be clearly transmitted to all workers, or even completely masked. Secondly, workers inside the wheel hub, due to wearing protective equipment (such as ear protection) or focusing on the current task, may not respond to announcements in a timely manner, leading to misjudgments or omissions. This results in significant safety hazards.

[0034] Therefore, this application determines whether there are any operators remaining inside the wheel hub by checking the number of people entering and exiting the hub and by the difference between the number of people entering and exiting the hub.

[0035] The following is combined with Figures 1 to 9 The following describes embodiments of the present invention.

[0036] According to an embodiment of this utility model, on one hand, the provided wind turbine manual pitch reminder device, such as... Figure 1 As shown, it includes an in-door triggering mechanism 1, an out-of-door triggering mechanism 2, and a control terminal.

[0037] Specifically, the inner trigger mechanism 1 is located on the inner side of the hub door 5. The inner trigger mechanism 1 includes an operable first handle 11 and a first detection unit 12 for detecting whether the first handle 11 has moved to a first preset position. The outer trigger mechanism 2 is located on the outer side of the hub door 5. The outer trigger mechanism 2 includes an operable second handle 21 and a second detection unit 22 for detecting whether the second handle 21 has moved to a second preset position. The control terminal signal is connected to the first detection unit 12 and the second detection unit 22 to receive and count the first trigger signal of the first detection unit 12 and the second trigger signal of the second detection unit 22, respectively. The control terminal is configured to compare the cumulative number of the second trigger signal with the cumulative number of the first trigger signal and output the comparison result.

[0038] Specifically, when the cumulative number of the second trigger signal is greater than the cumulative number of the first trigger signal, the control terminal outputs a standby signal to prohibit the wind turbine from performing manual pitch control; when the cumulative number of the second trigger signal is equal to the cumulative number of the first trigger signal, the control terminal outputs a pitch signal for the wind turbine to perform manual pitch control.

[0039] This setup allows for precise determination of whether all personnel have left the hub cabin by counting and comparing the cumulative number of trigger signals inside and outside the door, thus avoiding the significant risk of accidentally initiating pitch control due to personnel remaining inside the hub cabin.

[0040] For example, if the number of external triggers exceeds the number of internal triggers (such as when personnel in the hub compartment do not operate in time), the control terminal immediately outputs a standby signal to prohibit manual pitching, effectively preventing mechanical injury caused by personnel not responding to commands.

[0041] For example, pitch control can only be permitted when the number of internal and external triggers is equal, ensuring that high-risk actions are only performed when it is confirmed that no one is inside the hub, thus completely eliminating safety hazards caused by personnel not evacuating or being distracted.

[0042] Meanwhile, by combining physical triggering mechanisms (inner and outer handles) with electronic detection units, mechanical actions replace voice transmission, transforming subjective command responses into a closed-loop process of objective actions, signals, and judgments. This forces operators to complete entry and exit confirmations step by step, reducing safety accidents caused by human error, arbitrary operation, or unclear communication, avoiding the impact of environmental noise on signals, and ensuring the stability and accuracy of trigger signals.

[0043] In one embodiment, such as Figure 1 As shown, the wind turbine manual pitch reminder device also includes a door pin mechanism, which includes a door pin 3. The door pin 3 is installed on the bottom inner side of the hub door 5 and is configured to insert into the pin hole 51 under its own weight.

[0044] With this configuration, the door pin 3 is locked by inserting into the pin hole 51 under its own gravity, without relying on active mechanisms such as hydraulic, electric or spring drives. Compared with traditional door locks (such as those that require electricity or manual operation), this design avoids door lock failure due to power failure, circuit failure or operation error, ensuring that the door is always in a safe closed state when not actively opened.

[0045] Meanwhile, the inside of the wheel hub often has problems such as vibration, temperature difference and electromagnetic interference, while the gravity self-locking mechanism is not affected by these factors and can maintain stable locking performance under high vibration, wind or accidental collision, so as to prevent the door from loosening due to vibration or accidentally popping open.

[0046] The following illustration uses the process of moving the second handle 21 as an example.

[0047] Specifically, such as Figure 2 , Figures 7 to 9 As shown, when the second handle 21 is not subjected to external force, it will abut against the bottom wall of the second guide hole due to its own weight; if it is necessary to open the hub door 5, an external force is applied to the second handle 21, and it moves upward against the weight of the second handle 21 until it is as shown. Figure 3 , Figures 7 to 9 As shown, it moves towards the top wall of the second guide hole and abuts against the top wall of the second guide hole; as Figure 4 , Figures 7 to 9 As shown, the external force continues to act on the second handle 21 and continues to drive the second handle 21 to move upward. At this time, it is necessary to overcome the gravity of the door pin 3 and drive the door pin 3 to move upward until the second handle 21 acts on the second detection end 221. During this process, the door pin 3 completely disengages from the pin hole 51.

[0048] In one embodiment, such as Figures 1 to 4 , Figures 7 to 9As shown, the first detection unit 12 has a first detection end 121 along the height direction, and the second detection unit 22 has a second detection end 221 along the height direction; the door pin 3 has a movable chamber inside, and the outer side wall of the door pin 3 has a first guide hole 301 communicating with the movable chamber, and the inner side wall of the door pin 3 has a second guide hole communicating with the movable chamber; the vertical distance between the top wall of the first guide hole 301 and the first detection end 121, and the vertical distance between the top wall of the second guide hole and the second detection end 221 are both greater than the vertical length of the door pin 3 for inserting into the pin hole 51; the first handle 11 and the second handle 21 are both configured to move upward along the height direction under the action of external force until their execution ends act on the top wall of the corresponding movable slots, thereby driving the door pin 3 to gradually disengage from the pin hole 51.

[0049] This configuration, by setting the vertical distance between the top wall of the first / second guide hole and the detection end to be greater than the length of the insertion hole 51 of the door pin 3, provides sufficient overtravel for the upward operation of the first / second handle 21. This allows the first / second handle 21 to continue moving when it reaches the end of its travel within the active slot, and external force can be applied to drive the door pin 3 to continue moving until the door pin 3 is completely disengaged from the hole 51. Only then will the handle move to the preset position of the trigger detection unit, requiring the operator to complete the entire unlocking action. This avoids safety hazards such as the door pin 3 not being completely pulled out, the door jamming, or the door being partially closed due to insufficient operating force or stopping halfway through the travel, ensuring the integrity and effectiveness of each door action.

[0050] Among them, such as Figures 1 to 4 As shown in the image, the left side of the door is the inside, and the right side is the outside.

[0051] In other alternative embodiments, the first guide hole 301 and the second guide hole are arranged in a horizontally offset manner in the projection of the left (inside the door) / right (outside the door) side wall of the door pin.

[0052] In one embodiment, such as Figure 1 and Figure 6 As shown, the door external triggering mechanism 2 also includes a first connecting rod 23. The first connecting rod 23 has a first limiting section 231, a first connecting section 232, and a transition section 233. The first limiting section 231 and the first connecting section 232 are respectively installed on the inner and outer sides of the wheel hub door 5. The first connecting section 232 is connected to the first handle 11. The transition section 233 is used to connect the first limiting section 231 and the first connecting section 232. The transition section 233 is movably installed inside the wheel hub door 5.

[0053] With this configuration, the first limiting segment 231 is fixed to the inside of the hub door 5, the first connecting segment 232 is connected to the handle, and the transition segment 233 slides through the movable groove. The limiting segment and the first connecting segment 232 form a two-way physical constraint in the horizontal direction, which not only restricts the lateral displacement of the transition segment 233 in the movable groove (to prevent jamming caused by vibration or uneven operating force), but also allows it to move freely in the vertical direction (to ensure the smooth unlocking of the door pin 3). This ensures that the transition segment 233 always moves smoothly along the preset vertical trajectory, avoiding friction, interference, or even jamming with the edge of the movable groove due to misalignment.

[0054] It can be explained that during installation, the first limiting section 231 is first placed into the movable cavity, and then the first connecting section 232 and the transition section 233 are passed through the first guide hole 301 and then through the wheel hub door 5 until the first connecting section 232 is exposed on the outside of the wheel hub door 5 and then connected to the first handle 11.

[0055] Among them, the hub door 5 is provided with a through hole.

[0056] It should be noted that, in the height direction, the movement of the main body of the transition section 233 within the through hole and the movement of the connection between the transition section 233 and the first limiting section 231 at the second guide hole are consistent.

[0057] In one embodiment, such as Figure 1 As shown, the door triggering mechanism 2 also includes a first elastic element 14. The first elastic element 14 is sleeved on the first connecting section 232, and its two ends, which are elastically deformed, act elastically on the outer wall of the hub door 5 and the first handle 11, respectively.

[0058] In one embodiment, such as Figure 1 and Figure 5 As shown, the door triggering mechanism 1 also includes a second connecting rod 13. The second connecting rod 13 has a second limiting section 131 and a second connecting section 132. The second limiting section 131 is installed in the door pin 3. The end of the second connecting section 132 connected to the second limiting section 131 is movably installed in the second guide hole. The end of the second connecting section 132 away from the second limiting section 131 extends toward the inside of the door pin 3 and is used to connect with the second handle 21.

[0059] With this configuration, the second limiting segment 131 is fixed to the inside of the door pin 3, and the second connecting segment 132 slides through the nesting of the movable groove. At the same time, its extended end is connected to the second handle 21. This rigid constraint combined with the movable nesting structure design not only restricts the lateral displacement of the second connecting rod 13 in the horizontal direction (to prevent jamming caused by vibration or uneven operating force), but also allows it to move freely in the vertical direction (to ensure the smooth unlocking of the door pin 3).

[0060] In one embodiment, such as Figure 1As shown, the door triggering mechanism 1 also includes a second elastic element 24. The second elastic element 24 is sleeved on the second connecting section 132, and its two ends, which are elastically deformed, act elastically on the inner wall of the door pin 3 and the second handle 21, respectively.

[0061] In one embodiment, such as Figures 1 to 4 As shown, the wind turbine manual pitch warning device also includes a protective cover 4. The protective cover 4 has an opening at its bottom, used to cover the first detection end 121 and the second detection end 221. The first detection end 121 and the second detection end 221 are located inside the protective cover 4 and are arranged close to the opening.

[0062] This configuration physically isolates the first detection end 121 and the second detection end 221 by using a protective cover 4. By placing the first detection end 121 and the second detection end 221 inside the protective cover 4 and arranging them close to the opening, the operator can only touch the detection end when moving the handle upwards. This prevents the operator or external objects (such as handles, tools, or foreign objects) from accidentally touching the detection end, thereby eliminating signal fluctuations or incorrect counting caused by accidental touch.

[0063] According to an embodiment of the present invention, another aspect of the wind turbine generator set provided includes a hub nacelle, a hub door 5, and a manual pitch reminder device for the wind turbine.

[0064] The hub compartment is provided with a hub door hole 91 and a pin hole 51. The pin hole 51 is located at the bottom of the inner side of the hub door hole 91. The top of the hub door 5 is hinged to the top of the hub door hole 91, and the bottom is installed in the pin hole 51 through a door pin 3. The wind turbine manual pitch reminder device is the same as the wind turbine manual pitch reminder device mentioned above, and is used to install on the hub door 5.

[0065] This setup is because the wind turbine generator set includes a manual pitch warning device, which has the same effect as the manual pitch warning device, and will not be elaborated further here.

[0066] In one embodiment, such as Figure 7 As shown, the top of the hub door 5 is hinged to the top of the hub door hole 91 via a hinge 6.

[0067] With this configuration, the hinge 6 hinge design allows the hub door 5 to rotate and open at a large angle with the top as the fulcrum, so that the door can be fully unfolded and close to the top or side wall of the hub door hole 91, and the hub door hole 91 of the hub compartment can be fully opened.

[0068] In one embodiment, such as Figure 8 As shown, the hub door 5 is provided with a door pin operating handle 8. During installation, the door pin 3 is installed at the door pin operating handle 8 by several fixing clamps 7 and is located below the door pin operating handle 8.

[0069] It can be noted that pitch control can be performed either inside the engine room or inside the hub.

[0070] For example, when operating inside the wheel hub, the presence of operators can be determined by a combination of verbal announcements and counting.

[0071] Specifically, at the pitch control console inside the hub compartment, the number of people responding to the call is manually counted by calling out, and then the counts from the two counters are checked to determine whether the difference between the two counters equals the number of people responding to the call.

[0072] If the difference is not equal to the number of people responding to the call, it proves that there are personnel in the hub who did not respond to the call, and that such personnel may be stuck in a dangerous area. Pitching should not be performed to avoid a safety accident. If they are equal, it proves that the operator in the hub responded within a safe area, and manual pitching is permitted at the pitch control panel.

[0073] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A manual pitch control reminder device for wind turbines, characterized in that, include: The door triggering mechanism (1) is located inside the hub door (5). The door triggering mechanism (1) includes an operable first handle (11) and a first detection unit (12) for detecting whether the first handle (11) has moved to a first preset position. The door triggering mechanism (2) is located on the outside of the wheel hub door (5). The door triggering mechanism (2) includes an operable second handle (21) and a second detection unit (22) for detecting whether the second handle (21) has moved to a second preset position. The control terminal is connected to the first detection unit (12) and the second detection unit (22) for receiving and counting the first trigger signal of the first detection unit (12) and the second trigger signal of the second detection unit (22), respectively. The control terminal is configured to compare the cumulative number of times the second trigger signal is received with the cumulative number of times the first trigger signal is received, and output the comparison result; Specifically, when the cumulative number of the second trigger signal is greater than the cumulative number of the first trigger signal, the control terminal outputs a standby signal to prohibit the wind turbine from performing manual pitch control; when the cumulative number of the second trigger signal is equal to the cumulative number of the first trigger signal, the control terminal outputs a pitch signal for the wind turbine to perform manual pitch control.

2. The wind turbine manual pitch reminder device according to claim 1, characterized in that, The wind turbine manual pitch reminder device also includes a latch mechanism, which includes: The door pin (3) is installed on the bottom inner side of the hub door (5) and is configured to be inserted into the pin hole (51) under its own weight.

3. The wind turbine manual pitch reminder device according to claim 2, characterized in that, The first detection unit (12) is provided with a first detection end (121) along the height direction, and the second detection unit (22) is provided with a second detection end (221) along the height direction. The door pin (3) has an internal movable chamber. The outer side wall of the door pin (3) is provided with a first guide hole (301) communicating with the movable chamber. The inner side wall of the door pin (3) is provided with a second guide hole communicating with the movable chamber. The vertical distance between the top wall of the first guide hole (301) and the first detection end (121), and the vertical distance between the top wall of the second guide hole and the second detection end (221) are both greater than the vertical length of the door pin (3) used to insert into the pin hole (51); The first handle (11) and the second handle (21) are both configured to move upward along the height direction under the action of external force until their execution ends act on the top wall of the corresponding active slot, thereby driving the door pin (3) to gradually disengage from the pin hole (51).

4. The wind turbine manual pitch reminder device according to claim 3, characterized in that, The external triggering mechanism (2) further includes: The first connecting rod (23) is provided with a first limiting section (231), a first connecting section (232) and a transition section (233). The first limiting section (231) and the first connecting section (232) are respectively installed on the inner side and the outer side of the wheel hub door (5). The first connecting section (232) is connected to the first handle (11). The transition section (233) is used to connect the first limiting section (231) and the first connecting section (232). The transition section (233) is movably installed inside the wheel hub door (5).

5. The wind turbine manual pitch reminder device according to claim 4, characterized in that, The external triggering mechanism (2) further includes: The first elastic element (14) is sleeved on the first connecting section (232), and its two ends, which are elastically deformed, act on the outer wall of the wheel hub door (5) and the first handle (11) respectively.

6. The wind turbine manual pitch reminder device according to claim 3, characterized in that, The door triggering mechanism (1) further includes: The second connecting rod (13) is provided with a second limiting section (131) and a second connecting section (132). The second limiting section (131) is installed in the door pin (3). The end of the second connecting section (132) connected to the second limiting section (131) is movably installed in the second guide hole. The end of the second connecting section (132) away from the second limiting section (131) extends toward the inside of the door pin (3) for connection with the second handle (21).

7. The wind turbine manual pitch reminder device according to claim 6, characterized in that, The door triggering mechanism (1) further includes: The second elastic element (24) is sleeved on the second connecting section (132), and its two ends, which are elastically deformed, act elastically on the inner wall of the door pin (3) and the second handle (21) respectively.

8. The wind turbine manual pitch reminder device according to any one of claims 3-7, characterized in that, The wind turbine manual pitch reminder device also includes: A protective cover (4) is used to cover the first detection end (121) and to cover the second detection end (221), and the bottom of the protective cover (4) is provided with an opening; The first detection end (121) and the second detection end (221) are located inside the protective cover (4) and are arranged close to the opening.

9. A wind turbine generator set, characterized in that, include: The hub housing is provided with a hub door hole (91) and a pin hole (51), wherein the pin hole (51) is located at the bottom of the inner side of the hub door hole (91); The hub door (5) is hinged at the top of the hub door hole (91) and installed at the bottom through the door pin (3) in the pin hole (51). The wind turbine manual pitch reminder device is the wind turbine manual pitch reminder device according to any one of claims 1-8, and is used to be installed on the hub door (5).

10. The wind turbine generator set according to claim 9, characterized in that, The top of the hub door (5) is hinged to the top of the hub door hole (91) via a hinge (6).

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