A wind turbine oil leakage monitoring and detecting system

Abstract

The utility model relates to a kind of wind generating set oil product leakage monitoring detection systems, belong to leakage detection field.It includes: oil receiving tray, oil tank, pumping mechanism, monitoring mechanism and controller, the oil receiving tray is downwardly inclined and fixed in the top of the oil tank, and it is communicated with the oil tank, the pumping mechanism is communicated with the bottom of the oil tank, the monitoring mechanism is installed in the oil receiving tray and the oil tank, the pumping mechanism and the monitoring mechanism are connected with the controller.The utility model provides judging basis for staff maintenance by monitoring oil product leakage condition, and can also receive leakage oil product, to save time for staff to come to the scene to handle leakage.

Description

Technical Field

[0001] This utility model relates to the field of leakage detection, and in particular to a monitoring and detection system for oil leakage in wind turbine generator sets. Background Technology

[0002] Doubly fed wind turbine generator sets are equipped with large oil-filling devices such as gearboxes and hydraulic stations. To meet the needs of lubrication, heat dissipation, and transmission, these devices hold approximately 400L of oil. During routine maintenance and repairs, the oil filter needs to be replaced periodically, and pipelines need to be disassembled. If the seals fail or the maintenance process is poor, oil leakage can easily occur. Because the oil level fluctuates during generator operation, there is no alarm mechanism for initial oil leakage. When about one-quarter of the oil (approximately 100L) has leaked, the generator reports a low oil level fault and shuts down. Large-scale oil leakage also poses a significant fire hazard, pollutes equipment and the environment, damages equipment, and affects power generation.

[0003] However, some wind turbine generators are located in remote mountainous areas and deserts, where the daily inspection and maintenance cycle for staff is long, or there may not be enough time to deal with emergencies. Therefore, how to monitor oil leakage before it increases to the alarm level, and how to allow staff to rush to the site to handle the leakage, has become an urgent problem to be solved. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a monitoring and detection system for oil leakage in wind turbine generator sets, which provides a basis for staff to make judgments on oil leakage by monitoring the oil leakage situation, and can also receive the leaked oil, so as to buy time for staff to come to the site to deal with the leakage.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A wind turbine generator oil leakage monitoring and detection system includes: an oil receiving pan, an oil storage tank, a pumping mechanism, a monitoring mechanism, and a controller. The oil receiving pan is inclined downward and fixed at the top of the oil storage tank and communicates with the oil storage tank. The pumping mechanism is communicated with the bottom of the oil storage tank. The monitoring mechanism is installed in the oil receiving pan and the oil storage tank. Both the pumping mechanism and the monitoring mechanism are connected to the controller.

[0006] The beneficial effects of this utility model are as follows: The oil receiving tray is tilted downwards and fixed at the top of the oil storage tank, which is conducive to receiving oil leaking from the oil filling equipment and guiding the oil to the oil storage tank for storage, avoiding pollution of equipment, environmental pollution, and damage to equipment, and reducing fire hazards; The pumping mechanism is connected to the bottom of the oil storage tank, which is conducive to pumping the oil in the oil storage tank to the oil filling equipment when the oil level in the oil storage tank exceeds the preset level, avoiding alarm shutdown due to excessive oil leakage in the oil filling equipment, thus buying time for staff to arrive at the scene to deal with the leakage; The monitoring mechanism, together with the controller, is conducive to monitoring the oil leakage of the oil filling equipment, providing a basis for judgment for remote inspection and maintenance by staff.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the oil receiving tray includes: a bottom baffle, a top baffle, a bottom plate, and two side plates. The bottom plate is inclined downwards at the top of the oil storage tank. The bottom baffle and the top baffle are fixedly installed at the downward and upward inclined ends of the bottom plate, respectively. The two side plates are fixedly installed on both sides of the bottom plate. The bottom baffle, the top baffle, the bottom plate, and the two side plates together form a shell structure with an open top. The bottom baffle and the bottom plate are both fixedly connected to the top of the oil storage tank. The monitoring mechanism is installed on the bottom plate and the side plates.

[0009] The beneficial effects of adopting the above-mentioned further scheme are: it helps to form a shell structure with an open top for the oil receiving pan, which not only provides a channeling space for receiving leaked oil, but also provides support for the installation of the monitoring agency.

[0010] Furthermore, the angle between the bottom plate of the oil receiving tray and the horizontal plane is 3-5 degrees.

[0011] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the diversion of oil leaking from the oil filling equipment to the oil storage tank for storage.

[0012] Furthermore, the height of the bottom baffle of the oil receiving tray is greater than the height of the top baffle of the oil receiving tray.

[0013] The advantages of adopting the above-mentioned further solution are: the height of the bottom baffle of the oil receiving pan is relatively large, which is beneficial to prevent a large amount of leaking oil from overflowing from the downward-sloping end of the bottom plate of the oil receiving pan before the oil tank is full but the staff has not yet arrived; the height of the top baffle of the oil receiving pan is relatively small, which is beneficial to reducing the manufacturing cost of the oil receiving pan.

[0014] Furthermore, the monitoring mechanism includes: a radio frequency sensor, a detection sensing strip, and a liquid level sensor. The radio frequency sensor is fixedly installed on the side plate of the oil receiving pan. The detection sensing strip is pasted on the top surface of the oil receiving pan bottom plate along the inclined direction of the oil receiving pan bottom plate. The liquid level sensor is fixed on the inner wall of the oil storage tank. The radio frequency sensor, the detection sensing strip, and the liquid level sensor are all connected to the controller.

[0015] The beneficial effects of adopting the above-mentioned further solutions are: the liquid level sensor, radio frequency sensor and detection sensing strip serve as the first, second and third monitoring and alarm devices, respectively, which helps to avoid the failure to detect oil leakage in a timely manner due to the failure of a single monitoring and alarm device, thereby reducing fire hazards and avoiding pollution of equipment, environmental pollution, equipment damage and impact on power generation.

[0016] Furthermore, an oil outlet is provided at the connection between the bottom baffle of the oil receiving tray and the bottom plate of the oil receiving tray. The oil outlet is a strip-shaped through hole and is located inside the oil storage tank.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the oil outlet is set at the connection between the bottom baffle of the oil receiving pan and the bottom plate of the oil receiving pan, which is conducive to allowing the leaked oil flowing down the bottom plate of the oil receiving pan to enter the oil storage tank for storage, thus avoiding the leakage of oil from polluting the equipment and the environment.

[0018] Furthermore, the oil receiving tray also includes an oil guide component, which is a tubular structure. The top end of the oil guide component is fixedly connected to the bottom baffle and the bottom plate of the oil receiving tray and communicates with the oil outlet. Its bottom end is located near the bottom inner wall of the oil storage tank.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the oil guide component helps to guide the leaking oil flowing out of the oil outlet to flow out near the bottom inner wall of the oil tank, avoiding splashing of the leaking oil when it enters the oil tank, thereby avoiding interference with the liquid level sensor.

[0020] Furthermore, the oil guide includes a collecting section and a guiding section. The oil outlet is located in the collecting section. The two sides of the top of the collecting section are fixedly connected to the bottom surface of the oil receiving pan base plate and the outer wall of the bottom baffle of the oil receiving pan, respectively. The top of the guiding section is connected to the bottom of the collecting section, and its bottom is located close to the bottom inner wall of the oil storage tank.

[0021] The beneficial effects of adopting the above-mentioned further solution are: the oil outlet is set in the collection section, and the two sides of the top of the collection section are fixedly connected to the bottom surface of the oil receiving pan bottom plate and the outer wall of the oil receiving pan bottom baffle, which is conducive to the leakage oil flowing out from the oil outlet completely entering the collection section, and entering the oil storage tank from the position near the bottom inner wall of the oil storage tank along the collection section and the guide section.

[0022] Furthermore, it also includes a camera, which is positioned to be aimed at the bottom baffle of the oil receiving pan and the bottom plate of the oil receiving pan, and the camera is connected to the controller.

[0023] The beneficial effects of adopting the above-mentioned further solution are: the camera is useful as a verification device, and after receiving the alarm signal in the monitoring room, it can remotely check whether there is any oil leakage in the oil receiving pan, thereby providing auxiliary judgment basis for staff to go to the site for handling.

[0024] Furthermore, the pumping mechanism includes: an oil pump, a return oil pipe, and a solenoid valve. The oil pump is connected to the return oil port of the oil storage tank and the oil filling device through the return oil pipe. The solenoid valve is located at the connection between the return oil pipe and the oil storage tank. The connection between the return oil pipe and the oil storage tank is located at the lower end of the side wall of the oil storage tank. The oil pump and the solenoid valve are connected to the controller.

[0025] The beneficial effects of adopting the above-mentioned further solution are: the oil pump and solenoid valve are connected to the controller, which is conducive to controlling the start of the oil pump and the opening of the solenoid valve after the liquid level sensor alarms, so as to transport the leaked oil stored in the oil storage tank back to the oil filling equipment, thus buying time for staff to come to the scene to deal with the leak. Attached Figure Description

[0026] Figure 1 A side view of the overall structure provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the oil receiving tray provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram showing the connection between the oil guide and the oil receiving tray provided in an embodiment of the present utility model.

[0027] The attached diagram lists the components represented by each number as follows: 1. Oil receiving tray; 2. Oil storage tank; 3. Pumping mechanism; 4. Monitoring mechanism; 5. Camera; 6. Oil filling equipment; 11. Bottom baffle of oil receiving tray; 12. Top baffle of oil receiving tray; 13. Oil outlet; 14. Oil guide component; 15. Bottom plate of oil receiving tray; 16. Side plate of oil receiving tray; 31. Oil pump; 32. Return oil pipe; 33. Solenoid valve; 41. Radio frequency sensor; 42. Detection sensing strip; 43. Liquid level sensor; 141. Collection section; 142. Guide section. Detailed Implementation

[0028] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0029] like Figures 1 to 3As shown in the figure, this embodiment provides a wind turbine generator oil leakage monitoring and detection system, including: an oil receiving pan 1, an oil storage tank 2, a pumping mechanism 3, a monitoring mechanism 4, and a controller. The oil receiving pan 1 is inclined downward and fixed at the top of the oil storage tank 2 and communicates with the oil storage tank 2. The pumping mechanism 3 is communicated with the bottom of the oil storage tank 2. The monitoring mechanism 4 is installed in the oil receiving pan 1 and the oil storage tank 2. Both the pumping mechanism 3 and the monitoring mechanism 4 are connected to the controller.

[0030] It should be noted that in this embodiment, the controller is a single-chip microcomputer module with wireless communication function. The signal transmission and control between the controller and the pumping mechanism 3 and the monitoring mechanism 4 are existing technologies. The controller is connected to the monitoring room via wireless communication and remotely transmits the signals collected by the monitoring mechanism 4 to the monitoring room, providing a basis for remote judgment for staff to inspect and maintain the equipment.

[0031] The beneficial effects of this utility model are as follows: The oil receiving tray is tilted downwards and fixed at the top of the oil storage tank, which is conducive to receiving oil leaking from the oil filling equipment and guiding the oil to the oil storage tank for storage, avoiding pollution of equipment, environmental pollution, and damage to equipment, and reducing fire hazards; The pumping mechanism is connected to the bottom of the oil storage tank, which is conducive to pumping the oil in the oil storage tank to the oil filling equipment when the oil level in the oil storage tank exceeds the preset level, avoiding alarm shutdown due to excessive oil leakage in the oil filling equipment, thus buying time for staff to arrive at the scene to deal with the leakage; The monitoring mechanism, together with the controller, is conducive to monitoring the oil leakage of the oil filling equipment, providing a basis for judgment for remote inspection and maintenance by staff.

[0032] Preferred, such as Figure 2 As shown, the oil receiving tray 1 includes: a bottom baffle 11, a top baffle 12, a bottom plate 15, and two side plates 16. The bottom plate 15 is inclined downwards at the top of the oil storage tank 2. The bottom baffle 11 and the top baffle 12 are fixedly fixed to the bottom plate 15 at one end and one end at the other, respectively. The two side plates 16 are fixedly fixed to both sides of the bottom plate 15. The bottom baffle 11, the top baffle 12, the bottom plate 15, and the two side plates 16 together form a shell structure with an open top. The bottom baffle 11 and the bottom plate 15 are both fixedly connected to the top of the oil storage tank 2. The monitoring mechanism 4 is installed on the bottom plate 15 and the side plates 16.

[0033] It should be noted that in this embodiment, both the bottom baffle 11 of the oil receiving pan and the bottom plate 15 of the oil receiving pan are sealed to the top of the oil storage tank 2, that is, the oil will not leak from the connection between the bottom baffle 11 of the oil receiving pan and the top of the oil storage tank 2, or from the connection between the bottom plate 15 of the oil receiving pan and the top of the oil storage tank 2. The bottom baffle 11 of the oil receiving tray, the top baffle 12 of the oil receiving tray, the bottom plate 15 of the oil receiving tray, and the two side plates 16 of the oil receiving tray form a shell structure with a top opening. Except for the top opening, the shell structure is internally sealed.

[0034] The advantages of adopting the above-mentioned preferred scheme are: it helps to form a shell structure with an open top for the oil receiving pan, which not only provides a channeling space for receiving leaked oil, but also provides support for the installation of the monitoring device.

[0035] Preferred, such as Figure 1 As shown, the angle between the bottom plate 15 of the oil receiving tray and the horizontal plane is 3-5 degrees.

[0036] The advantage of adopting the above-mentioned preferred solution is that it facilitates the diversion of oil leaking from the oil filling equipment to the oil storage tank for storage.

[0037] Preferred, such as Figure 1 As shown, the height of the bottom baffle 11 of the oil receiving tray is greater than the height of the top baffle 12 of the oil receiving tray.

[0038] The advantages of adopting the above-mentioned preferred solution are: the height of the bottom baffle of the oil receiving pan is relatively large, which is beneficial to prevent a large amount of leaking oil from overflowing from the downward-sloping end of the bottom plate of the oil receiving pan before the oil tank is full but the staff has not yet arrived; the height of the top baffle of the oil receiving pan is relatively small, which is beneficial to reducing the manufacturing cost of the oil receiving pan.

[0039] Preferred, such as Figure 1 and Figure 2 As shown, the monitoring mechanism 4 includes: an RF sensor 41, a detection sensing strip 42, and a liquid level sensor 43. The RF sensor 41 is fixedly installed on the side plate 16 of the oil receiving pan. The detection sensing strip 42 is pasted on the top surface of the bottom plate 15 of the oil receiving pan along the inclined direction of the bottom plate 15. The liquid level sensor 43 is fixed on the inner wall of the oil storage tank 2. The RF sensor 41, the detection sensing strip 42, and the liquid level sensor 43 are all connected to the controller.

[0040] It should be noted that in this embodiment, the radio frequency sensor 41, the detection sensing strip 42, and the liquid level sensor 43 are all existing technologies. The working principle of the radio frequency sensor 41 is as follows: The radio frequency sensor 41 is fixedly installed on the side plate 16 of the oil receiving pan using a bracket, with its transmitter and receiver facing the bottom plate 15 of the oil receiving pan. The transmitter emits a radio frequency signal, which is reflected after encountering the bottom plate 15 of the oil receiving pan. The receiver captures the reflected signal. By calculating the time difference or phase difference of the signal round trip, the target distance is deduced. When the liquid level sensor 43 and the pumping mechanism 3 malfunction, the first monitoring alarm fails, and the oil in the already filled oil tank 2 cannot be returned to the oil filling equipment 6, the leaked oil will gradually accumulate in the oil receiving pan 1. At this time, the radio frequency sensor 41 acts as the second monitoring alarm device. Its transmitter emits a radio frequency signal, which is reflected after encountering the oil surface. The receiver captures the reflected signal. By calculating the time difference or phase difference of the signal round trip, the target distance is deduced. When the target distance reaches the preset alarm value, the radio frequency sensor 41 transmits the alarm signal to the controller, which then wirelessly transmits it to the monitoring room to notify the staff. The detection sensor strip 42 is an immersion alarm device. When oil accumulates in the oil receiving pan 1 and immerses into the detection sensor strip 42, the detection sensor strip 42 will emit an alarm signal. The amount of oil immersed in the detection sensor strip 42 is inversely proportional to the alarm signal emission time. That is, the greater the amount of oil immersed in the detection sensor strip 42, the shorter the alarm signal emission time and the faster the frequency. At this time, the detection sensor strip 42 acts as a third monitoring and alarm device, transmitting the alarm signal to the controller. The controller then wirelessly transmits the signal to the monitoring room to notify the staff. In addition, it should be noted that since the oil leakage points of the oil filling equipment 6, such as gearboxes and hydraulic stations, are basically fixed, when attaching the detection sensing strip 42 to the top surface of the oil receiving pan base plate 15, it is necessary to avoid setting it to the contact point between the oil leakage point of the oil filling equipment 6 and the oil receiving pan base plate 15 when it falls naturally, so as to prevent the leaked oil from falling naturally onto the detection sensing strip 42 and interfering with the normal operation of the detection sensing strip 42. When the detection sensing strip 42 is pasted on the top surface of the oil receiving pan base plate 15 along the inclined direction of the oil receiving pan base plate 15, the end of the detection sensing strip 42 near the oil outlet 13 is positioned above the transmitter and receiver of the radio frequency sensor 41 in terms of height, so as to ensure that the detection sensing strip 42, which is the third monitoring and alarm device, only starts to work after the radio frequency sensor 41, which is the second monitoring and alarm device, fails. The liquid level sensor 43 serves as the first monitoring and alarm device. When it is working normally, if it detects that the oil in the oil storage tank 2 has risen to a preset liquid level, it will transmit an alarm signal to the controller. The controller will then wirelessly transmit the signal to the monitoring room to notify the staff to handle the leak. In order to buy time for the staff to arrive at the scene to handle the leak, the controller controls the pumping mechanism 3 to start, pumping the oil in the oil storage tank 2 to the oil filling device 6, thereby lowering the liquid level in the oil storage tank 2.

[0041] The advantages of adopting the above-mentioned preferred scheme are: the liquid level sensor, the radio frequency sensor, and the detection sensing strip serve as the first, second, and third monitoring and alarm devices, respectively. This helps to avoid the inability to detect oil leakage in a timely manner due to the failure of a single monitoring and alarm device, thereby reducing fire hazards and avoiding pollution of equipment, the environment, equipment damage, and impact on power generation.

[0042] Preferred, such as Figure 2 As shown, an oil outlet 13 is provided at the connection between the bottom baffle 11 of the oil receiving tray and the bottom plate 15 of the oil receiving tray. The oil outlet 13 is a strip-shaped through hole and is located inside the oil storage tank 2.

[0043] The advantages of adopting the above-mentioned preferred solution are: the oil outlet is located at the connection between the bottom baffle of the oil receiving pan and the bottom plate of the oil receiving pan, which is conducive to allowing the leaked oil flowing down the bottom plate of the oil receiving pan to enter the oil storage tank for storage, thus avoiding the leakage of oil from polluting the equipment and the environment.

[0044] Preferred, such as Figure 1 and Figure 3 As shown, the oil receiving tray 1 also includes an oil guide 14, which is a tubular structure. The top end of the oil guide 14 is fixedly connected to the bottom baffle 11 and the bottom plate 15 of the oil receiving tray, and communicates with the oil outlet 13. Its bottom end is located close to the bottom inner wall of the oil storage tank 2.

[0045] The advantages of adopting the above preferred solution are: the oil guide component helps to guide the leaking oil flowing from the oil outlet to the bottom inner wall near the oil tank, avoiding splashing when the leaking oil enters the oil tank, thereby avoiding interference with the liquid level sensor.

[0046] Preferred, such as Figure 1 and Figure 3As shown, the oil guide 14 includes a collecting section 141 and a guiding section 142. The oil outlet 13 is disposed in the collecting section 141. The two sides of the top end of the collecting section 141 are fixedly connected to the bottom surface of the oil receiving pan bottom plate 15 and the outer wall of the oil receiving pan bottom baffle 11, respectively. The top end of the guiding section 142 is connected to the bottom end of the collecting section 141, and its bottom end is disposed close to the bottom inner wall of the oil storage tank 2.

[0047] It should be noted that in this embodiment, "the outer wall of the bottom baffle 11 of the oil receiving pan" refers to the side wall of the bottom baffle 11 of the oil receiving pan that is away from the interior of the oil receiving pan 1.

[0048] The advantages of adopting the above preferred solution are: the oil outlet is set in the collection section, and the two sides of the top of the collection section are fixedly connected to the bottom surface of the oil receiving pan bottom plate and the outer wall of the oil receiving pan bottom baffle, which is conducive to the leakage oil flowing out from the oil outlet completely entering the collection section and entering the oil storage tank from the position near the bottom inner wall of the oil storage tank along the collection section and the guide section.

[0049] Preferred, such as Figure 1 and Figure 2 As shown, it also includes a camera 5, which is positioned to face the bottom baffle 11 of the oil receiving pan and the bottom plate 15 of the oil receiving pan, and the camera 5 is connected to the controller.

[0050] It should be noted that in this embodiment, the camera 5 is installed on the top baffle 12 of the oil receiving tray. However, in other preferred embodiments, the installation position of the camera 5 is not fixed, as long as it is aligned with the bottom baffle 11 of the oil receiving tray and the bottom plate 15 of the oil receiving tray.

[0051] The advantages of adopting the above-mentioned preferred solution are: the camera is useful as a verification device, and after receiving the alarm signal in the monitoring room, it can remotely check whether there is any oil leakage in the oil receiving pan, thus providing auxiliary judgment basis for staff to go to the site for handling.

[0052] Preferred, such as Figure 1 As shown, the pumping mechanism 3 includes: an oil pump 31, an oil return pipe 32, and a solenoid valve 33. The oil pump 31 is connected to the oil storage tank 2 and the oil filling device 6 through the oil return pipe 32. The solenoid valve 33 is located at the connection between the oil return pipe 32 and the oil storage tank 2. The connection between the oil return pipe 32 and the oil storage tank 2 is located at the lower end of the side wall of the oil storage tank 2. The oil pump 31 and the solenoid valve 33 are connected to the controller.

[0053] The advantages of adopting the above-mentioned preferred solution are: the connection between the oil pump and the solenoid valve and the controller is beneficial to control the start of the oil pump and the opening of the solenoid valve after the liquid level sensor alarms, so as to transport the leaked oil stored in the oil storage tank back to the oil filling equipment, thus buying time for the staff to come to the scene to deal with the leak.

[0054] The working process of this embodiment is described below: like Figures 1 to 3 As shown: When oil leaks out of the oil filling device 6 and drips into the oil receiving pan 1, it slides down the inclined bottom plate 15 of the oil receiving pan to the oil outlet 13, and then enters the oil guide 14 through the oil outlet 13. After that, it enters the oil storage tank 2 from the part near the bottom inner wall of the oil storage tank 2. As oil continuously leaks out of the oil filling device 6, it will continuously enter the oil storage tank 2 until the liquid level in the oil storage tank 2 reaches the height of the liquid level sensor 43 (it should be noted that when the liquid level in the oil storage tank 2 reaches the height of the liquid level sensor 43, it has not yet reached the amount of leaked oil that causes the unit to report a low oil level fault and shut down as mentioned in the background art). At this time, the liquid level sensor 43, as the first monitoring and alarm device, starts to work: the liquid level sensor 43 transmits the signal to the controller, and the controller remotely transmits it wirelessly to the monitoring room, notifying the staff that there is a large amount of oil leakage in the oil filling equipment 6, the unit reports a low oil level fault, and the unit is about to shut down; at this time, on the one hand, the staff in the monitoring room can open the solenoid valve 33 and the oil pump 31 through the controller to continuously pump the oil in the oil storage tank 2 back to the oil filling equipment 6, so as to prevent the oil in the oil filling equipment 6 from decreasing further, buy time for the staff to come to the scene to deal with the leakage, and avoid the unit shutdown; on the other hand, the staff can observe through the camera 5 whether there is oil continuously sliding to the oil outlet 13 on the bottom plate 15 of the oil receiving pan. If so, the alarm is accurate and the staff can be arranged to go to the scene to deal with it. If not, it may be a false alarm and the alarm can be reset for subsequent observation or the next inspection. If the level sensor 43 malfunctions and cannot transmit a signal, the leaking oil will continue to rise until it fills the oil storage tank 2 and reaches the height detected by the radio frequency sensor 41. At this point, the radio frequency sensor 41 will start working as the second monitoring and alarm device: the radio frequency sensor 41 will transmit a signal to the controller, which will then remotely transmit the signal wirelessly to the monitoring room, notifying the staff that there is a large amount of oil leaking from the oil filling equipment 6, the unit will report a low oil level fault, and the unit will soon shut down. Furthermore, the alarm level of the level sensor 43 is higher than that of the first monitoring and alarm device. At this time, on the one hand, the staff in the monitoring room can open the solenoid valve 33 and the oil pump 31 through the controller to continuously pump the oil from the oil storage tank 2 back to the oil filling equipment 6 to prevent the oil in the oil filling equipment 6 from decreasing further, thus buying time for the staff to come to the scene to deal with the leak and avoiding the unit shutdown. On the other hand, the staff can observe whether there is oil accumulation in the oil receiving pan 1 through the camera 5. If there is, the alarm is accurate and staff need to be arranged to go to the scene as soon as possible. If there is no oil, it may be a false alarm, and the alarm can be reset for further observation or the next inspection. If both the level sensor 43 and the radio frequency sensor 41 malfunction and cannot transmit signals, and the leaking oil continues to rise in the receiving pan 1 after filling the oil storage tank 2, then the detection sensor strip 42, acting as the third monitoring and alarm device, will activate. The detection sensor strip 42 transmits the signal to the controller, which then remotely transmits it wirelessly to the monitoring room, notifying staff that there is a large oil leak in the filling equipment 6, the unit reports a low oil level fault, and the unit is about to shut down. Furthermore, since both the level sensor 43 and the radio frequency sensor 41 are malfunctioning, the alarm level is higher than that of the second monitoring and alarm device. The faster the alarm frequency of the detection sensor strip 42, the higher the alarm level. The higher the oil level in oil pan 1, the more serious the situation. At this time, on the one hand, the staff in the monitoring room can open the solenoid valve 33 and the oil pump 31 through the controller to continuously pump the oil in the oil storage tank 2 back to the oil filling equipment 6, so as to prevent the oil in the oil filling equipment 6 from continuing to decrease, buy time for the staff to come to the scene to deal with the leak, and avoid the unit from shutting down. On the other hand, the staff can observe whether there is oil accumulation in the oil receiving pan 1 through the camera 5. If there is, the alarm is accurate and the staff needs to be arranged to go to the scene to deal with it immediately. If there is no oil, it may be a false alarm and the alarm can be reset for subsequent observation or the next inspection.

[0055] It should be noted that when the oil level in the oil tank 2 reaches the height of the level sensor 43, when the oil level in the oil receiving pan 1 reaches the preset alarm height of the radio frequency sensor 41, and when the oil level in the oil receiving pan 1 reaches the limit alarm frequency of the detection sensing band 42, the amount of oil leakage required for the unit to report a low oil level fault and shut down, as mentioned in the background technology, has not yet reached the level of oil leakage required for the unit to shut down. However, if there are no false alarms, under the alarm signals of the above three monitoring and alarm devices, the greater the amount of oil leakage, the closer it is to unit shutdown, the higher the alarm level, and the more urgently the staff needs to go to the site to handle the situation.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A monitoring and detection system for oil leakage in wind turbine generator sets, characterized in that, include: The oil receiving tray (1), oil storage tank (2), pumping mechanism (3), monitoring mechanism (4) and controller are provided. The oil receiving tray (1) is fixedly installed at the top of the oil storage tank (2) at a downward angle and is connected to the oil storage tank (2). The pumping mechanism (3) is connected to the bottom of the oil storage tank (2). The monitoring mechanism (4) is installed in the oil receiving tray (1) and the oil storage tank (2). The pumping mechanism (3) and the monitoring mechanism (4) are both connected to the controller. The oil receiving tray (1) includes: a bottom baffle (11), a top baffle (12), a bottom plate (15), and two side plates (16). The bottom plate (15) is inclined downwards at the top of the oil storage tank (2). The bottom baffle (11) and the top baffle (12) are fixedly fixed to the bottom and top ends of the bottom plate (15) of the oil receiving tray, respectively. The two side plates (16) are fixed to the bottom and top ends of the oil receiving tray. The bottom baffle (11), top baffle (12), bottom plate (15) and two side plates (16) of the oil receiving pan are fixedly installed on both sides of the oil receiving pan base plate (15) to form a shell structure with an open top. The bottom baffle (11) and bottom plate (15) of the oil receiving pan are fixedly connected to the top of the oil storage tank (2). The monitoring mechanism (4) is installed on the bottom plate (15) and side plates (16) of the oil receiving pan.

2. The wind turbine generator oil leakage monitoring and detection system according to claim 1, characterized in that, The angle between the bottom plate (15) of the oil receiving tray and the horizontal plane is 3-5 degrees.

3. The wind turbine generator oil leakage monitoring and detection system according to claim 1, characterized in that, The height of the bottom baffle (11) of the oil receiving tray is greater than the height of the top baffle (12) of the oil receiving tray.

4. The wind turbine generator oil leakage monitoring and detection system according to claim 1, characterized in that, The monitoring mechanism (4) includes: a radio frequency sensor (41), a detection sensing strip (42), and a liquid level sensor (43). The radio frequency sensor (41) is fixedly installed on the side plate (16) of the oil receiving pan. The detection sensing strip (42) is pasted on the top surface of the bottom plate (15) of the oil receiving pan along the inclined direction of the bottom plate (15). The liquid level sensor (43) is fixed on the inner wall of the oil storage tank (2). The radio frequency sensor (41), the detection sensing strip (42), and the liquid level sensor (43) are all connected to the controller.

5. The wind turbine generator oil leakage monitoring and detection system according to claim 1, characterized in that, An oil outlet (13) is provided at the connection between the bottom baffle (11) of the oil receiving tray and the bottom plate (15) of the oil receiving tray. The oil outlet (13) is a strip-shaped through hole and is located inside the oil storage tank (2).

6. The wind turbine generator oil leakage monitoring and detection system according to claim 5, characterized in that, The oil receiving tray (1) also includes an oil guide (14), which is a tubular structure. The top end of the oil guide (14) is fixedly connected to the bottom baffle (11) of the oil receiving tray and the bottom plate (15) of the oil receiving tray, and communicates with the oil outlet (13). Its bottom end is located close to the bottom inner wall of the oil storage tank (2).

7. The wind turbine generator oil leakage monitoring and detection system according to claim 6, characterized in that, The oil guide (14) includes a collecting section (141) and a guiding section (142). The oil outlet (13) is located in the collecting section (141). The two sides of the top of the collecting section (141) are fixedly connected to the bottom surface of the oil receiving pan bottom plate (15) and the outer wall of the oil receiving pan bottom baffle (11). The top of the guiding section (142) is connected to the bottom of the collecting section (141), and its bottom is located close to the bottom inner wall of the oil storage tank (2).

8. The wind turbine generator oil leakage monitoring and detection system according to claim 1, characterized in that, It also includes a camera (5), which is positioned to face the bottom baffle (11) of the oil receiving pan and the bottom plate (15) of the oil receiving pan, and the camera (5) is connected to the controller.

9. The wind turbine generator oil leakage monitoring and detection system according to any one of claims 1-8, characterized in that, The pumping mechanism (3) includes: an oil pump (31), a return pipe (32) and a solenoid valve (33). The oil pump (31) is connected to the oil storage tank (2) and the return port of the oil filling device (6) through the return pipe (32). The solenoid valve (33) is located at the connection between the return pipe (32) and the oil storage tank (2). The connection between the return pipe (32) and the oil storage tank (2) is located at the lower end of the side wall of the oil storage tank (2). The oil pump (31) and the solenoid valve (33) are connected to the controller.

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