Condition monitoring device and wind turbine generator system

Abstract

The utility model provides a kind of state monitoring device and wind generating set, it includes displacement sensor and mounting piece, displacement sensor is installed in the wheel hub of wind generating set by mounting piece, displacement sensor is located at the end surface position close to output shaft, displacement sensor and the end surface of output shaft remain preset gap, displacement sensor is used to alarm or output alarm signal when output shaft slides out preset distance along its axial direction.The probe of the displacement sensor of state monitoring device and the end surface of output shaft remain preset gap, if output shaft slides out preset distance along its axial direction, displacement sensor will be triggered, the alarm device integrated in the inside of displacement sensor starts to alarm, or displacement sensor outputs alarm signal, to let external device alarm.State monitoring device monitors the state of output shaft in real time, can be achieved when the output shaft of variable pitch speed reducer has protruding tendency timely early warning, avoid the loss of blade and unit due to variable pitch gear box damage.

Description

Technical Field

[0001] This utility model relates to a status monitoring device and a wind turbine generator set. Background Technology

[0002] Pitch gearboxes are an indispensable component of wind turbine generators. They optimize wind energy capture by controlling blade angles, thereby improving power generation efficiency. Near rated wind speeds, the blade angles are adjusted in real time according to wind speed changes to balance mechanical stress and reduce impact on the generator. During shutdown, the blades are adjusted to a feathering position, achieving safe shutdown through aerodynamic braking to prevent equipment damage. Therefore, the performance of the pitch gearbox directly affects the efficiency and reliability of wind power generation. As the power output of wind turbine generators continues to increase, increasing the power output means that the generator needs to capture more wind energy. The pitch system needs to adjust the blade angles more frequently to adapt to different wind speeds, resulting in a greater load on the gearbox. Although most pitch gearbox faults can be monitored manually, if the output shaft of the pitch gearbox only slips and protrudes slightly, yet still operates normally, this condition is difficult to monitor. If this condition persists for a long time, it will inevitably completely damage the internal components of the gearbox, causing blade damage or even more serious quality accidents. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a status monitoring device and a wind turbine generator set.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A status monitoring device is provided for monitoring the output shaft of a pitch reducer of a wind turbine generator set. The status monitoring device includes a displacement sensor and a mounting component. The displacement sensor is mounted on the hub of the wind turbine generator set via the mounting component. The displacement sensor is located near the end face of the output shaft. A preset gap is maintained between the displacement sensor and the end face of the output shaft. The displacement sensor is used to trigger an alarm or output an alarm signal when the output shaft slides out a preset distance along its own axial direction.

[0006] In this solution, the displacement sensor probe of the status monitoring device maintains a preset gap with the end face of the output shaft to monitor the displacement changes of the output shaft of the wind turbine's pitch reducer. If the output shaft slides out of its axial direction by a preset distance, the displacement sensor is triggered, and the alarm device integrated inside the displacement sensor starts to sound an alarm, or the displacement sensor outputs an alarm signal to trigger an external device. The alarm method can be an audible alarm, a warning light, or an alarm pop-up window on the software interface of the external device. The status monitoring device monitors the status of the output shaft in real time, enabling timely warnings when the output shaft of the pitch reducer shows a tendency to bulge, facilitating timely troubleshooting by operators and avoiding damage to the blades and the entire unit due to damage to the pitch gearbox.

[0007] Preferably, the status monitoring device further includes a protective cover, which includes a side wall and an end cap. The side wall is detachably connected to the hub and surrounds the periphery of the output shaft. Its shape matches the periphery of the output shaft and at least partially covers the periphery of the output shaft. The end cap is connected to the side wall and covers the end face of the output shaft. At least a portion of the end face of the output shaft is exposed outside the end cap and is positioned opposite to the probe of the displacement sensor.

[0008] In this design, the protective cover protects the periphery and end face of the output shaft and prevents dust from entering the tooth surface. After the output shaft slides a certain distance, its end face abuts against the end cover, which further prevents it from detaching, mitigating the greater risk of the output shaft falling off. The end cover has a detection channel for the displacement sensor probe to detect the end face of the output shaft. The detection channel can be a notch or a through-hole on the end cover.

[0009] Preferably, the protective cover further includes a flanged portion with a through hole, and the status monitoring device further includes a fastening component that passes through the through hole and is threaded to the hub to fix the protective cover to the hub.

[0010] In this solution, the above-mentioned structural configuration is adopted to ensure that the protective cover is firmly connected to the wheel hub, thereby improving the connection strength of the protective cover and thus improving its reliability.

[0011] Preferably, the fastening assembly includes a bolt and a washer, the shank of the bolt being threaded through the through hole to the hub, and the washer being fitted onto the shank and positioned between the head of the bolt and the flange.

[0012] In this design, bolted connections are used, making it easy to utilize the threaded holes on the hub flange and simplifying installation. A washer is placed between the bolt head and the flange to increase the contact area between them, preventing the bolt from loosening or falling off.

[0013] Preferably, the fastening assembly further includes a sleeve, which is fitted onto the rod portion, with the upper end of the sleeve abutting against the washer and the lower end of the sleeve abutting against the flange portion.

[0014] In this solution, by setting a sleeve on the rod, the connection strength of the bolt can be increased, the fatigue performance of the bolt can be improved, and the bolt length can be adjusted, as well as the bolt can be installed and disassembled.

[0015] Preferably, the flange extends along the circumferential direction of the hub, and there are multiple through holes spaced apart along the circumferential direction. The fastening components are arranged in a one-to-one correspondence with the through holes.

[0016] In this solution, the above-mentioned structural design is adopted to improve the connection strength between the protective cover and the wheel hub.

[0017] Preferably, the end cap portion has a fan-shaped structure and is at a first distance from the end face of the output shaft, the first distance being greater than the preset distance;

[0018] And / or, the probe of the displacement sensor can move along the axial direction of the output shaft between a first position and a second position, the first position being located between the plane where the end cover is located and the end face of the output shaft, the second position being located on the side of the plane where the end cover is located away from the end face of the output shaft, and the distance between the probe and the end face of the output shaft is the preset distance.

[0019] And / or, when the output shaft slides out along its own axis and abuts against the displacement sensor, the displacement sensor alarms or outputs an alarm signal.

[0020] In this solution, there is a first distance between the end cover and the end face of the output shaft. This first distance is greater than a preset distance, so that there is enough space inside the end cover to install the probe of the displacement sensor. The probe of the displacement sensor can be inserted into the end cover through the detection channel.

[0021] The displacement sensor probe can move between a first position and a second position to prevent damage to the displacement sensor when the output shaft slides out, without affecting the displacement sensor alarm or the output signal to external devices.

[0022] The distance between the displacement sensor probe and the end face of the output shaft is preset. When the output shaft slides out of the preset distance, the end face of the output shaft will abut against the probe, triggering the probe and causing the sensor to alarm or output an alarm signal. This triggering method, achieved by the displacement sensor probe abutting against the probe, is simpler and more reliable than triggering by detecting the displacement of the output shaft using a displacement tactile sensor.

[0023] Preferably, the mounting component includes an L-shaped structure, a first segment of which is connected to the protective cover, a second segment of which is connected to the first segment and perpendicular to each other, and the second segment is arranged parallel to the end face of the output shaft and extends protruding towards the hub. The displacement sensor is mounted on the first segment of the L-shaped structure, and the second segment is used to fix the cable of the displacement sensor.

[0024] In this design, the L-shaped structure of the mounting component facilitates both the installation of the displacement sensor and the installation of its cable.

[0025] Preferably, the second segment of the L-shaped structure is provided with mounting holes for fasteners to pass through in order to secure the cable.

[0026] Preferably, the status monitoring device further includes a controller and an alarm, both of which are electrically connected to the controller.

[0027] In this scheme, the controller is used both to receive alarm signals from the displacement sensor and to send signals to the alarm to trigger it.

[0028] A wind turbine generator set, the wind turbine generator set including the status monitoring device as described above.

[0029] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0030] The significant advantages of this invention are as follows: The displacement sensor probe of the status monitoring device maintains a preset gap with the end face of the output shaft to monitor the displacement changes of the output shaft of the wind turbine's pitch reducer. If the output shaft slides out of its preset axial distance, the displacement sensor is triggered, and the integrated alarm device within the sensor begins to sound an alarm, or the displacement sensor outputs an alarm signal to trigger an external device. The alarm can be an audible alarm, a warning light, or an alarm pop-up window on the software interface of the external device. The status monitoring device monitors the output shaft's status in real time, enabling timely warnings when the pitch reducer's output shaft shows a tendency to bulge, facilitating prompt intervention by operators and preventing damage to the blades and the entire turbine due to pitch gearbox damage. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a state monitoring device according to a preferred embodiment of the present invention. Figure 1 .

[0032] Figure 2 This is a schematic diagram of the structure of a state monitoring device according to a preferred embodiment of the present invention. Figure 2 .

[0033] Figure 3 This is a schematic diagram of the structure of a state monitoring device according to a preferred embodiment of the present invention. Figure 3 .

[0034] Figure 4 This is a partial cross-sectional structural diagram of a state monitoring device according to a preferred embodiment of the present invention.

[0035] Figure 5 This is a structural schematic diagram of the protective cover and mounting component according to a preferred embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] Output shaft 10

[0038] 20mm wheel hub

[0039] Displacement sensor 1

[0040] Installation Component 2

[0041] First paragraph, 21

[0042] Second paragraph, 22

[0043] Protective shield 3

[0044] Side wall portion 31

[0045] End cap 32

[0046] Flanged section 33

[0047] Through hole 331

[0048] Fastening component 4

[0049] Bolt 41

[0050] Washer 42

[0051] Sleeve 43 Detailed Implementation

[0052] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0053] like Figures 1-5As shown, this embodiment discloses a status monitoring device for monitoring the output shaft 10 of a wind turbine's pitch reducer. The device includes a displacement sensor 1 and a mounting bracket 2. The displacement sensor 1 is mounted on the hub 20 of the wind turbine via the mounting bracket 2, positioned near the end face of the output shaft 10. A preset gap is maintained between the displacement sensor 1 and the end face of the output shaft 10. The displacement sensor 1 is used to trigger an alarm or output an alarm signal when the output shaft 10 slides out a preset distance along its axial direction. The probe of the displacement sensor 1 maintains a preset gap with the end face of the output shaft 10 to monitor the displacement change of the output shaft 10 of the wind turbine's pitch reducer. If the output shaft 10 slides out a preset distance along its axial direction, the displacement sensor 1 is triggered, and the integrated alarm device within the displacement sensor 1 starts to alarm, or the displacement sensor 1 outputs an alarm signal to trigger an external device. The alarm method can be an audible alarm, a warning light, or an alarm pop-up window on the software interface of the external device. The status monitoring device monitors the status of the output shaft 10 in real time and can provide timely warnings when the output shaft 10 of the pitch reducer shows a tendency to bulge, so that operators can troubleshoot in time and avoid damage to the blades and the unit caused by damage to the pitch gearbox.

[0054] like Figures 1-5 As shown, the status monitoring device also includes a protective cover 3, which includes a side wall portion 31 and an end cap portion 32. The side wall portion 31 is detachably connected to the hub 20 and surrounds the periphery of the output shaft 10, its shape conforming to the periphery of the output shaft 10, at least partially covering the periphery of the output shaft 10. The end cap portion 32 is connected to the side wall portion 31 and covers the end face of the output shaft 10, with at least a portion of the end face of the output shaft 10 exposed outside the end cap portion 32, and is positioned opposite to the probe of the displacement sensor 1. The protective cover 3 serves to protect the periphery and end face of the output shaft 10 and also prevents dust from entering the tooth surface of the output shaft 10. After the output shaft 10 slides a certain distance, the end face of the output shaft 10 will abut against the end cap portion 32, which further prevents the output shaft 10 from detaching, thus avoiding the greater risk caused by the output shaft 10 falling off. The end cap 32 is provided with a detection channel so that the probe of the displacement sensor 1 can detect the end face of the output shaft 10 through the detection channel. The detection channel can be a notch or a through hole on the end cap 32.

[0055] In some embodiments, the sidewall portion 31 surrounds the periphery of the output shaft 10, covering at least 40% of the periphery of the output shaft 10; in some other embodiments, the covered area should be as large as possible without affecting the travel of the displacement sensor.

[0056] In this embodiment, the protective cover 3 adopts a contour-following design. The protective cover structure is designed according to the shape of the output teeth of the reducer and the interface on the hub 20. A safety clearance is reserved in the radial direction with the output shaft 10 to achieve maximum coverage. The axial direction provides an installation position for the displacement sensor 1. After the displacement sensor 1 is installed, a signal feedback will be generated when the distance from the output shaft 10 exceeds a certain range (preset distance). The size of the preset distance can be set according to the user's needs.

[0057] The protective cover 3 is made of a metal material of a certain thickness as the base. After the output shaft 10 slides and protrudes, it can form an effective support and protection for it. At the same time, the inner side of the protective cover 3 must not interfere with the output shaft 10 of the pitch reducer to improve safety.

[0058] The functions of displacement sensor 1 in detecting when an object slides out of a preset distance and triggering an alarm or outputting an alarm signal are existing technologies and will not be described in detail here.

[0059] like Figure 5 As shown, the protective cover 3 also includes a flange 33, on which a through hole 331 is provided. The status monitoring device also includes a fastening component 4, which is threaded through the through hole 331 and connected to the hub 20 to fix the protective cover 3 to the hub 20, thereby improving the connection strength between the protective cover 3 and the hub 20 and thus improving reliability.

[0060] like Figure 2 and Figure 4 As shown, specifically, the fastening assembly 4 includes a bolt 41 and a washer 42. The shank of the bolt 41 is threaded through the through hole 331 and connected to the hub 20. The washer 42 is fitted onto the shank and positioned between the head of the bolt 41 and the flange 33. Using the bolt 41 for connection facilitates the use of the threaded hole on the flange of the hub 20, making installation simple and convenient. Placing the washer 42 between the head of the bolt 41 and the flange 33 increases the contact area between them, preventing the bolt 41 from loosening or falling off.

[0061] Preferably, such as Figure 2 and Figure 4As shown, the fastening assembly 4 also includes a sleeve 43, which is fitted onto the shank. The upper end of the sleeve 43 abuts against the washer 42, and the lower end of the sleeve 43 abuts against the flange 33. By providing a sleeve 43 on the shank of the bolt 41, the strength and stability of the connection can be significantly enhanced, stress can be distributed, and loosening or breakage of the connection due to overload can be prevented. By providing a sleeve 43 on the shank of the bolt 41, the bolt 41 can be isolated from external environmental corrosion, extending its service life. At the same time, some sleeve 43 materials have good corrosion resistance, which can further enhance the durability of the entire connection. By providing a sleeve 43 on the shank of the bolt 41, the precise alignment and fixation of the components can be achieved by adjusting the position and depth of the sleeve 43. In addition, the bolt 41 with a sleeve 43 is also more convenient to disassemble, reducing the difficulty and risk during the disassembly process. In practical applications, due to differences in the size and shape of the components, different specifications and types of bolts 41 may be required for connection. The size and type of bolt 41 can be flexibly adjusted by using the adaptable sleeve 43, so that it can adapt to various complex connection requirements.

[0062] like Figures 1-5 As shown, the flange 33 extends along the circumferential direction of the hub 20, and there are multiple through holes 331. The multiple through holes 331 are spaced apart along the circumferential direction. The fastening component 4 is set in a one-to-one correspondence with the through holes 331 to improve the connection strength between the protective cover 3 and the hub 20.

[0063] like Figure 1 As shown, the protective cover 3 is installed on the outside of the output shaft 10 of the pitch reducer, and the mounting interface on the flange 33 is consistent with the interface of the pitch reducer on the hub 20.

[0064] like Figures 1-3 As shown, the end cap 32 has a fan-shaped structure and a first distance from the end face of the output shaft 10. The first distance is greater than a preset distance, so that there is enough space in the end cap 32 to install the probe of the displacement sensor 1. The probe of the displacement sensor 1 can be inserted into the end cap 32 through the detection channel.

[0065] like Figure 3 As shown, the probe of displacement sensor 1 can move along the axial direction of output shaft 10 between a first position and a second position. The first position is located between the plane of end cover 32 and the end face of output shaft 10, and the second position is located on the side of the plane of end cover 32 away from the end face of output shaft 10. The distance between the probe and the end face of output shaft 10 is a preset distance. The probe of displacement sensor 1 can move between the first and second positions to prevent damage to displacement sensor 1 when output shaft 10 slides out, while also not affecting the alarm of displacement sensor 1 or the output signal to external devices.

[0066] When the output shaft 10 slides out along its own axis and comes into contact with the displacement sensor 1, the displacement sensor 1 alarms or outputs an alarm signal. The distance between the probe of the displacement sensor 1 and the end face of the output shaft 10 is a preset distance. When the output shaft 10 slides out of the preset distance, the end face of the output shaft 10 will come into contact with the probe, triggering the probe and causing the displacement sensor 1 to alarm or output an alarm signal. This triggering method, achieved by the probe of the displacement sensor 1 coming into contact with the sensor, is simpler and more reliable than triggering by detecting the displacement of the output shaft 10 using a displacement sensor.

[0067] like Figures 1-3 As shown, in this embodiment, the mounting component 2 includes an L-shaped structure. The first segment 21 of the L-shaped structure is connected to the protective cover 3, and the second segment 22 of the L-shaped structure is connected to the first segment 21 and perpendicular to each other. The second segment 22 is arranged parallel to the end face of the output shaft 10 and extends protruding towards the hub 20. The displacement sensor 1 is mounted on the L-shaped structure, and the second segment 22 is used to fix the cable of the displacement sensor 1. The L-shaped mounting component 2 facilitates both the installation of the displacement sensor 1 and the installation of its cable.

[0068] Preferably, the second segment 22 of the L-shaped structure of the mounting component 2 is provided with mounting holes for fasteners to pass through in order to secure the cable.

[0069] The installation position of displacement sensor 1 on mounting part 2 should be designed in conjunction with the stroke parameters of displacement sensor 1. It is required that the output shaft 10 touches the probe of displacement sensor 1 first during the disengagement process. If the output shaft 10 is disengaged to the point that it contacts the inside of the end cover 32 of the protective cover 3, the probe of displacement sensor 1 still has room to retract, which is used to protect displacement sensor 1 without affecting the alarm of displacement sensor 1.

[0070] Preferably, the status monitoring device further includes a controller (not shown in the figure) and an alarm (not shown in the figure), with both the displacement sensor 1 and the alarm electrically connected to the controller. The controller is used both to receive alarm signals from the displacement sensor and to send signals to the alarm to trigger it.

[0071] This embodiment also discloses a wind turbine generator set, which includes the status monitoring device described above.

[0072] In the description herein, it should be understood that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model.

[0073] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A status monitoring device for monitoring the output shaft of a pitch reducer in a wind turbine generator set, characterized in that, The status monitoring device includes a displacement sensor and a mounting component. The displacement sensor is mounted on the hub of the wind turbine generator set via the mounting component. The displacement sensor is located near the end face of the output shaft. A preset gap is maintained between the displacement sensor and the end face of the output shaft. The displacement sensor is used to trigger an alarm or output an alarm signal when the output shaft slides out a preset distance along its own axial direction.

2. The status monitoring device as described in claim 1, characterized in that, The status monitoring device also includes a protective cover, which includes a side wall and an end cap. The side wall is detachably connected to the hub and surrounds the periphery of the output shaft. Its shape matches the periphery of the output shaft and at least partially covers the periphery of the output shaft. The end cap is connected to the side wall and covers the end face of the output shaft. At least a portion of the end face of the output shaft is exposed outside the end cap and is positioned opposite to the probe of the displacement sensor.

3. The status monitoring device as described in claim 2, characterized in that, The protective cover also includes a flanged portion with a through hole. The status monitoring device also includes a fastening component that passes through the through hole and is threaded to the hub to fix the protective cover to the hub.

4. The status monitoring device as described in claim 3, characterized in that, The fastening assembly includes a bolt and a washer. The shank of the bolt passes through the through hole and is threaded to the hub. The washer is fitted onto the shank and placed between the head of the bolt and the flange.

5. The status monitoring device as described in claim 4, characterized in that, The fastening assembly further includes a sleeve, which is fitted onto the rod portion, with the upper end of the sleeve abutting against the washer and the lower end of the sleeve abutting against the flange portion.

6. The status monitoring device as described in claim 3, characterized in that, The flanged portion extends along the circumferential direction of the hub, and there are multiple through holes spaced apart along the circumferential direction. The fastening components are arranged in a one-to-one correspondence with the through holes.

7. The status monitoring device as described in claim 2, characterized in that, The end cap has a fan-shaped structure and is at a first distance from the end face of the output shaft, the first distance being greater than the preset distance; And / or, the probe of the displacement sensor can move along the axial direction of the output shaft between a first position and a second position, the first position being located between the plane where the end cover is located and the end face of the output shaft, the second position being located on the side of the plane where the end cover is located away from the end face of the output shaft, and the distance between the probe and the end face of the output shaft is the preset distance. And / or, when the output shaft slides out along its own axis and abuts against the displacement sensor, the displacement sensor alarms or outputs an alarm signal.

8. The status monitoring device as described in claim 2, characterized in that, The mounting component includes an L-shaped structure. The first segment of the L-shaped structure is connected to the protective cover. The second segment of the L-shaped structure is connected to the first segment and is perpendicular to each other. The second segment is arranged parallel to the end face of the output shaft and extends toward the hub. The displacement sensor is mounted on the first segment of the L-shaped structure, and the second segment is used to fix the cable of the displacement sensor.

9. The status monitoring device as described in any one of claims 1-8, characterized in that, The status monitoring device also includes a controller and an alarm, with the displacement sensor and the alarm both electrically connected to the controller.

10. A wind turbine generator set, characterized in that, The wind turbine generator set includes a status monitoring device as described in any one of claims 1-9.

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