Device for detecting oil leakage of cabin of wind turbine generator and preventing tower drum from being polluted

Abstract

The utility model relates to a device for detecting oil leakage of a cabin of a wind turbine generator system and preventing a tower drum from being polluted, which comprises vent hole oil baffle assemblies, and the vent hole oil baffle assemblies are arranged around the outer edge of each vent hole in a cabin cover and are used for preventing oil leakage from the vent holes; the engine room cover bottom oil collecting assembly is arranged on the engine room cover and used for transversely separating the rear end of the engine room cover from the ventilation hole area located at the front end of the engine room cover; and the liquid leakage detection assembly is arranged on the cabin cover on the side, deviating from the ventilation hole oil blocking assembly, of the cabin cover bottom oil collecting assembly and used for detecting whether liquid leakage exists on the cabin cover or not. The device has the advantages that the situation that oil in a cabin leaks to the outside can be effectively reduced, and unnecessary wind turbine generator operation and maintenance cost caused by tower barrel cleaning, environment rectification and the like is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of installation, operation and maintenance of wind turbine generators, in particular to a device for detecting oil leakage in the nacelle of a wind turbine generator and preventing pollution of the tower barrel. Background Technique

[0002] In the early stage, a design form of the bottom of a nacelle cover of a wind turbine generator is a structure with a horizontal front tower barrel area and a slope upward in the middle and rear areas. There are heating devices such as gearboxes and generators in the nacelle of the wind turbine generator. For the convenience of heat dissipation in the nacelle of this kind of structure, a plurality of ventilation holes are usually arranged around the tower barrel area at the front end of the bottom of the nacelle cover (as Figure 2 shown), and only a layer of dust-proof net is installed on the ventilation holes, and the rear end of the bottom of the nacelle cover is higher, while one side of the ventilation hole is lower. If the gearbox and its cooling and lubrication system leak, the dripping oil will flow from the middle and rear ends of the bottom of the nacelle cover to the front end of the bottom of the nacelle cover (as Figure 1 shown), and finally gather near the ventilation holes and flow out of the nacelle through the ventilation holes, resulting in pollution of the outer wall of the tower barrel, and at the same time, the unit has no monitoring feedback on the leaked oil. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a device for detecting oil leakage in the nacelle of a wind turbine generator and preventing pollution of the tower barrel, and solve at least one of the technical problems mentioned in the background technique.

[0004] The technical solution of the utility model to solve the above technical problems is as follows: A device for detecting oil leakage in the nacelle of a wind turbine generator and preventing pollution of the tower barrel, comprising:

[0005] An oil-blocking component for ventilation holes, one such oil-blocking component for ventilation holes is arranged along the outer edge of each ventilation hole on the nacelle cover, and is used to prevent oil leakage from the ventilation holes;

[0006] An oil-collecting component at the bottom of the nacelle cover, which is arranged on the nacelle cover and is used to transversely partition the rear end of the nacelle cover and the ventilation hole area located at the front end of the nacelle cover;

[0007] A liquid leakage detection component, which is arranged on the nacelle cover on the side of the oil-collecting component at the bottom of the nacelle cover away from the oil-blocking component for ventilation holes, and is used to detect whether there is liquid leakage on the nacelle cover.

[0008] The beneficial effects of the present utility model are as follows: This device can effectively reduce the situation of oil leakage from the engine room to the outside, and reduce unnecessary maintenance costs of wind turbines for cleaning the tower barrel, environmental improvement, etc.; by arranging an oil-blocking component around the ventilation holes at the bottom of the nacelle cover, it can effectively block the leaked oil from flowing into the ventilation holes, thereby preventing the oil from flowing out of the ventilation holes to the outside of the nacelle and avoiding the pollution of the outer wall of the tower barrel by the oil; the setting of the oil-collecting component at the bottom of the nacelle cover further blocks the oil from flowing towards the ventilation holes, playing a dual protection role; by adding feedback on the leaked oil in the nacelle, it can be detected by the external unit main control system at the early stage of oil leakage, enabling the leakage part to be repaired and disposed of in a timely manner, and at the same time reducing the major losses caused by insufficient lubrication of large equipment of wind turbines due to oil leakage.

[0009] On the basis of the above technical solution, the present utility model can also be improved as follows.

[0010] Further, the oil-blocking component for ventilation holes includes: a first sealing strip, which is arranged around the dust-proof net pressing plate of each ventilation hole and forms an end-to-end closed oil-blocking ring;

[0011] The number of the oil-blocking rings is the same as the number of the ventilation holes.

[0012] The beneficial effects of adopting the above further solution are: The oil-blocking device uses a sealing strip, which ensures long-term sealing effect and service life, and has low production cost and maintenance cost; the first sealing strip is arranged around the outer edge of each ventilation hole to form an oil-blocking ring, which can effectively block the leaked oil from flowing out of the nacelle cover through the ventilation holes, preventing the oil from polluting the outer wall of the tower barrel and the external environment.

[0013] Further, the oil-blocking ring is arranged higher than the end face of the ventilation hole.

[0014] The beneficial effects of adopting the above further solution are: Further block the leaked oil from flowing out through the ventilation holes.

[0015] Further, the oil-collecting component at the bottom of the nacelle cover includes: a second sealing strip, which is arranged along the width direction of the nacelle cover on the nacelle cover located at the rear end of the ventilation hole.

[0016] The beneficial effects of adopting the above further solution are: The second sealing strip plays a role in laterally separating the rear end of the nacelle cover and the ventilation holes, preventing the leaked oil from converging from the higher rear end of the nacelle cover to the ventilation holes located at the lower part.

[0017] Further, the second sealing strip is fixed to the nacelle cover through sealant and fasteners;

[0018] The joints between the inner and outer edges of the second sealing strip and the nacelle cover are connected by the sealant.

[0019] The beneficial effects of adopting the above further solution are as follows: The second sealing strip is fixed to the bottom of the nacelle cover by using sealant and fasteners, ensuring a tight connection between the second sealing strip and the bottom of the nacelle cover, and the installation method is simple; at the same time, the sealant can fill the tiny gaps, thereby enhancing the sealing performance of the second sealing strip, preventing the leaked oil from flowing to the ventilation holes, and the setting of the fasteners ensures that the second sealing strip will not shift or fall off during use, guaranteeing the stability of the second sealing strip.

[0020] Further, the liquid leakage detection assembly includes: a liquid level detection sensor, which is arranged on the nacelle cover on the side of the oil collecting assembly at the bottom of the nacelle cover away from the oil baffle assembly of the ventilation hole, and is used to detect whether there is liquid leakage on the nacelle cover.

[0021] The beneficial effects of adopting the above further solution are as follows: The liquid level detection sensor is arranged near the oil collecting assembly at the bottom of the nacelle cover, and can directly monitor the possibly accumulated oil, so as to accurately judge whether there is liquid leakage. In addition, a liquid leakage feedback is added to the main control, and the liquid level detection sensor selects an immersion sensor with a smaller thickness, which will be triggered as long as a small amount of leakage occurs, and can timely feedback that there is a leakage event in the nacelle of the wind turbine, enabling the operator to respond quickly and take necessary measures to ensure the safety of the equipment operation.

[0022] Further, at least one of the above-mentioned liquid level detection sensors is arranged on the nacelle cover.

[0023] The beneficial effects of adopting the above further solution are as follows: Whether there is oil at the position near the oil collecting assembly at the bottom of the nacelle cover is detected by the liquid level detection sensor, that is, whether there is liquid leakage on the nacelle cover is detected.

[0024] Further, when there is a partition structure arranged along the length direction of the nacelle cover on the nacelle cover, one of the above-mentioned liquid level detection sensors is respectively arranged in each of the multiple partition areas formed by the nacelle cover being partitioned by the partition structure.

[0025] The beneficial effects of adopting the above further solution are as follows: Independent detection of each partition area is realized to adapt to the specific structure and requirements of different nacelle covers, ensuring the timeliness and accuracy of detection, and facilitating the timely handling of leakage problems.

[0026] Further, the liquid leakage detection assembly further includes: a wiring bracket, which is vertically installed on the nacelle cover, and the wiring of the liquid level detection sensor is arranged on the wiring bracket to prevent the wiring from being immersed in the oil;

[0027] Adjacent liquid level detection sensors share one wiring bracket.

[0028] The beneficial effects of adopting the above further solution are as follows: The wiring of the liquid level detection sensor is arranged on the wiring bracket, avoiding the immersion of the wiring of the liquid level detection sensor in the oil.

[0029] Further, the liquid level detection sensor is externally connected to the main control system of the unit, and is used to transmit the detection signal to the main control system of the unit.

[0030] The beneficial effects of adopting the above further solution are as follows: By adding the feedback of the leaked oil in the nacelle, it can be detected by the main control system of the unit at the early stage of oil leakage, enabling the leakage part to be repaired and disposed of in time. At the same time, it also reduces the major losses caused by insufficient lubrication of large equipment of the wind turbine due to oil leakage. Description of the Drawings

[0031] Figure 1 It is a side view of the bottom of the nacelle cover;

[0032] Figure 2 It is a schematic structural diagram of the bottom of the existing nacelle cover;

[0033] Figure 3 It is a schematic structural diagram of an embodiment of the present utility model.

[0034] In the drawings, the list of components represented by each reference numeral is as follows:

[0035] 1. Nacelle cover; 2. Oil baffle assembly for ventilation holes; 3. Oil collecting assembly at the bottom of the nacelle cover; 4. Leakage detection assembly; 5. Ventilation hole; 11. Front end of the nacelle cover; 12. Rear end of the nacelle cover; 41. Liquid level detection sensor; 42. Wiring bracket. Detailed Embodiments

[0036] The principles and features of the present utility model are described below with reference to the drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0037] As Figure 3 shown, the present utility model provides a device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower barrel. This device is mainly applied to the bottom of the nacelle cover 1 of the wind turbine to prevent the leaked oil from flowing to the outside through the ventilation hole 5 at the bottom of the nacelle cover 1. Specifically, the device includes: an oil baffle assembly 2 for ventilation holes, an oil collecting assembly 3 at the bottom of the nacelle cover, and a leakage detection assembly 4 provided on the nacelle cover 1, wherein the ventilation hole 5 is arranged around the tower barrel area at the bottom of the nacelle cover 1, and the arrangement position of the ventilation hole 5 around the tower barrel area is as Figure 2 , Figure 3As shown, to prevent leaked oil from converging at the vents 5 and flowing out through the vents 5 to the outside of the nacelle and contaminating the tower outer wall, a vent oil blocking assembly 2 is provided around the outer edge of each vent 5. Furthermore, to prevent leaked oil from converging from the higher rear end 12 of the nacelle cover at the bottom of the nacelle cover 1 to the vents 5 at the lower front end 11 of the nacelle cover, a nacelle cover bottom oil collecting assembly 3 is provided near the vents 5 on the nacelle cover 1 to laterally separate the rear end 12 of the nacelle cover from the vent 5 area at the front end 11 of the nacelle cover. A leakage detection assembly 4 is provided on the nacelle cover 1 on the side of the nacelle cover bottom oil collecting assembly 3 facing away from the vent oil blocking assembly 2. The leakage detection assembly 4 detects and provides feedback on whether there is leakage on the nacelle cover 1.

[0038] When oil leaks from the wind turbine cabin and flows out of the cabin cover 1, it not only contaminates the outer wall of the tower, but also drips onto the ground below, causing environmental pollution and disputes. This device can effectively reduce the leakage of oil from the cabin to the outside, reducing unnecessary wind turbine operation and maintenance costs due to tower cleaning, environmental remediation, etc.; by providing a ventilation hole oil blocking assembly 2 around the ventilation hole 5 at the bottom of the cabin cover 1, it can effectively block the leaked oil from flowing into the ventilation hole 5, thereby preventing the oil from flowing out of the ventilation hole 5 to the outside of the cabin, avoiding the oil from contaminating the outer wall of the tower; the provision of an oil collecting assembly 3 at the bottom of the cabin cover further blocks the oil from flowing to the ventilation hole 5, playing a double protective role; by adding feedback on the oil leak in the cabin, the external unit main control system can detect the oil leak in the early stage, so that the leaking part can be repaired and handled in time, while also reducing the significant losses caused by insufficient lubrication of large wind turbine equipment due to oil leakage.

[0039] like Figure 3 As shown, in the preferred solution, the ventilation hole oil retaining assembly 2 includes: a first sealing strip, which is arranged around the outer edge of each ventilation hole 5 to form an oil retaining ring. The number of oil retaining rings is consistent with the number of ventilation holes 5 at the bottom of the engine cover 1, and prevents the leaked oil from flowing out of the engine cover 1 through the ventilation holes 5. Specifically, the first sealing strip can be an oil-resistant rubber sealing strip, and the size can be 40×20mm. During installation, a rubber sealing strip is placed along the dust screen pressure plate of the ventilation hole 5, and is cut off after being wrapped around once to form a closed-loop oil retaining ring that is connected end to end. Loctite 480 is used to bond the broken end of the first sealing strip at the connection point to form a closed loop.

[0040] The oil retaining device adopts a flexible oil-resistant rubber sealing strip, which can be applied to various cabin cover 1 structures for arbitrary sealing combination, and has good performance, ensuring long-term sealing effect and service life, and low production cost and maintenance cost; the first sealing strip is arranged around the outer edge of each ventilation hole 5 to form an oil retaining ring, which can effectively prevent the leaked oil from flowing out of the cabin cover 1 through the ventilation hole 5, preventing the oil from polluting the outer wall of the tower and the external environment.

[0041] At the same time, the oil retaining ring should also be arranged higher than the end face of the ventilation hole 5, that is, on the inner side of the bottom of the engine cover 1, the oil retaining ring is higher than and protrudes from the ventilation hole 5 to further prevent the leaked oil from flowing out of the ventilation hole 5.

[0042] like Figure 3 As shown, in the preferred embodiment, the oil collecting assembly 3 at the bottom of the nacelle cover includes: a second sealing strip, which is arranged on the nacelle cover 1 at the rear end of the ventilation hole 5 along the width direction of the bottom of the nacelle cover 1, and the second sealing strip serves to laterally separate the rear end 12 of the nacelle cover and the ventilation hole 5, thereby preventing the leaked oil from converging from the higher rear end of the bottom of the nacelle cover 1 to the lower ventilation hole 5; wherein the end of the nacelle cover 1 away from the ventilation hole 5 is defined as the rear end 12 of the nacelle cover.

[0043] In this embodiment, the oil collecting assembly 3 at the bottom of the cabin cover also adopts an oil-resistant rubber sealing strip. By adding a partition at the rear end of the ventilation hole 5 on the cabin cover 1, the rear end of the bottom of the cabin cover 1 and the ventilation hole 5 are horizontally separated, thereby collecting oil and reducing the accumulation of oil at the ventilation hole 5.

[0044] The second sealing strip is secured to the bottom of the nacelle 1 using sealant and fasteners. Specifically, the second sealing strip is secured to the bottom of the nacelle 1 using 1921 sealant and self-tapping screws. Finally, 1921 sealant is evenly applied along the inner and outer edges of the second sealing strip at the seam of the nacelle 1. After application, the sealant is spread evenly with a scraper to a thickness of approximately 10 mm. After the sealant is applied, the sealant must be allowed to cure for at least 24 hours. The inner and outer edges of the second sealing strip are defined as the sides of the second sealing strip that are closest to the vent 5 and those that are away from the vent 5. Using sealant and fasteners to secure the second sealing strip to the bottom of the nacelle 1 ensures a tight connection between the second sealing strip and the bottom of the nacelle 1, simplifying installation. The sealant can also fill small gaps, thereby enhancing the sealing performance of the second sealing strip and preventing leaked oil from flowing into the vent 5. The provision of fasteners ensures that the second sealing strip will not shift or fall off during use, thus ensuring its stability.

[0045] like Figure 3 As shown, in a preferred embodiment, the liquid leakage detection assembly 4 includes a liquid level detection sensor 41. The liquid level detection sensor 41 is installed on the nacelle 1 on the side of the nacelle bottom oil collection assembly 3 facing away from the vent oil retaining assembly 2. When installed, the liquid level detection sensor 41 is located near the nacelle bottom oil collection assembly 3. The liquid level detection sensor 41 detects the presence of oil near the nacelle bottom oil collection assembly 3, that is, detects whether there is liquid leakage on the nacelle 1 and provides timely feedback. Therefore, at least one liquid level detection sensor 41 is installed on the nacelle 1.

[0046] Specifically, an immersion type liquid level detection sensor can be installed on the rear side of the second sealing strip serving as an oil barrier at the bottom of the engine cover 1. The model and size of the sensor are selected as required. When the leaked oil submerges the liquid level detection sensor 41, leakage feedback is triggered. The specific setting liquid level height is >5mm, and an estimated leakage of 1.5L of liquid can be triggered. The structures of different engine covers 1 are slightly different, and the parameters are adaptively adjusted.

[0047] In this embodiment, the liquid level detection sensor 41 is arranged near the oil collecting assembly 3 at the bottom of the cabin cover, and can directly monitor the possible accumulation of oil, so as to accurately determine whether there is a leakage. In addition, a leakage feedback is added to the main control. The liquid level detection sensor 41 uses an immersion sensor with a smaller thickness. The liquid level height of the leaked oil only needs to be greater than 5mm to trigger the leakage feedback, that is, only a small amount of leakage will be triggered. It can timely feedback that a leakage incident has occurred in the wind turbine cabin, so that the operator can respond quickly and take necessary measures to ensure the safety of equipment operation.

[0048] Some nacelle covers 1 are also provided with a plurality of partition structures arranged along the length direction of the bottom of the nacelle cover 1, that is, the partition structures are arranged perpendicular to the oil collecting assembly 3 at the bottom of the nacelle cover, and the plurality of partition structures are arranged parallel to each other and spaced apart, so that the bottom of the nacelle cover 1 is divided into a plurality of partition areas by the partition structures. Correspondingly, a liquid level detection sensor 41 is respectively provided in each partition area to detect whether there is liquid leakage in the partition area.

[0049] Since the mounting flanges of the left and right nacelle covers 1 on some parts are vertical structures, a partition structure will be formed to divide the leaked oil into two parts. Therefore, two liquid level detection sensors 41 are required for monitoring, thereby realizing independent detection of each separated area to adapt to the specific structures and requirements of different nacelle covers 1, ensuring the timeliness and accuracy of the detection, and facilitating timely handling of leakage problems.

[0050] like Figure 3 As shown, the liquid leakage detection assembly 4 also includes a wiring bracket 42, which is vertically mounted on the nacelle 1 on the side of the nacelle bottom oil collection assembly 3 facing away from the vent oil blocking assembly 2, and is positioned near the nacelle bottom oil collection assembly 3. It is conceivable that adjacent liquid level detection sensors 41 share a wiring bracket 42, which can be installed in any partitioned area. During installation, the wiring of the liquid level detection sensor 41 is arranged on the wiring bracket 42 to prevent the wiring of the liquid level detection sensor 41 from being submerged in oil.

[0051] In this embodiment, the liquid level detection sensor 41 is externally connected to the main control system of the unit, so that the acquisition signal of the liquid level detection sensor 41 is transmitted to the PLC of the main control system of the unit to complete the electrical wiring. Subsequently, the main control program is modified to add a fault feedback, and the trigger logic is: "The feedback signal is detected continuously for 60 s". By adding the feedback of the leaked oil in the engine room, it can be detected by the main control system of the unit at the early stage of the oil leakage, so that the leakage part can be repaired and disposed in time, and at the same time, the major losses caused by the insufficient lubrication of the large equipment of the wind turbine due to the oil leakage are reduced.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An apparatus for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower, characterized in that include: A ventilation hole oil-blocking assembly (2) is provided around the outer edge of each ventilation hole (5) on the nacelle cover (1) to prevent oil leakage from the ventilation hole (5); A nacelle cover bottom oil collecting assembly (3), the nacelle cover bottom oil collecting assembly (3) being arranged on the nacelle cover (1) and being used for laterally separating the nacelle cover rear end (12) and the ventilation hole (5) region located at the nacelle cover front end (11); A liquid leakage detection assembly (4) is provided on the nacelle cover (1) at the side of the oil collecting assembly (3) at the bottom of the nacelle cover facing away from the vent oil blocking assembly (2), and is used to detect whether there is liquid leakage on the nacelle cover (1).

2. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower barrel according to claim 1, wherein The ventilation hole oil retaining assembly (2) comprises: a first sealing strip, which is arranged around the dust screen pressure plate of each ventilation hole (5) and forms a closed-loop oil retaining ring connected end to end; The number of the oil retaining rings is consistent with the number of the ventilation holes (5).

3. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower according to claim 2, characterized in that, The oil retaining ring is arranged higher than the end surface of the ventilation hole (5).

4. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower barrel according to claim 1, characterized in that, The nacelle cover bottom oil collecting assembly (3) comprises a second sealing strip, which is arranged on the nacelle cover (1) at the rear end of the ventilation hole (5) along the width direction of the nacelle cover (1).

5. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower according to claim 4, characterized in that, The second sealing strip is fixed to the nacelle cover (1) by means of sealant and fasteners; The inner and outer edges of the second sealing strip are connected to the joints of the nacelle cover (1) by means of the sealant.

6. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower tube according to claim 1, characterized in that, The liquid leakage detection assembly (4) comprises a liquid level detection sensor (41), which is arranged on the nacelle cover (1) at the side of the nacelle cover bottom oil collecting assembly (3) facing away from the ventilation hole oil blocking assembly (2) and is used to detect whether there is liquid leakage on the nacelle cover (1).

7. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower tube according to claim 6, characterized in that, At least one liquid level detection sensor (41) is provided on the nacelle cover (1).

8. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower tube according to claim 6 or 7, characterized in that, When the nacelle cover (1) is provided with a partition structure arranged along the length direction of the nacelle cover (1), a liquid level detection sensor (41) is respectively provided in a plurality of partitioned areas into which the nacelle cover (1) is partitioned by the partition structure.

9. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower tube according to claim 8, characterized in that, The liquid leakage detection assembly (4) further comprises: a wiring bracket (42), the wiring bracket (42) being vertically mounted on the nacelle cover (1), and a wiring of the liquid level detection sensor (41) being arranged on the wiring bracket (42) to prevent the wiring from being submerged in oil; Adjacent liquid level detection sensors (41) share one wiring bracket (42).

10. The device for detecting oil leakage in the nacelle of a wind turbine and preventing pollution of the tower barrel according to claim 6, wherein, The liquid level detection sensor (41) is externally connected to the unit main control system and is used to transmit the detection signal to the unit main control system.

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