Automatic alarm device for oil leakage and oil level monitoring of wind turbine generator cooling system

Abstract

The invention provides a wind turbine generator cooling system oil leakage and oil level monitoring automatic alarm device, which relates to the technical field of gear oil monitoring alarm, and comprises a detection assembly arranged between an oil outlet end of a wind turbine generator gear box and an oil outlet pipe of the wind turbine generator gear box. The oil inlet end and the oil outlet end of the wind turbine generator gearbox are provided with a first flow sensor and a second flow sensor respectively, the first flow sensor and the second flow sensor are in electric signal connection with a background data processing system arranged outside, and an alarm is arranged outside the wind turbine generator gearbox. Gear oil in a gearbox of the wind turbine generator flows through the detection assembly, and when the flow difference of the gear oil at the pipe joint of the oil inlet pipe and the oil outlet pipe exceeds the range or the flow is smaller than a set value, the background software alarms a fan to stop in real time, and operation and maintenance personnel carry out boarding inspection. And the maintenance work of the wind turbine generator is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of gear oil monitoring and alarm, and in particular to an automatic alarm device for monitoring oil leakage and oil level of a cooling system of a wind turbine generator set. Background Art

[0002] Wind turbine gearboxes are mostly cooled with oil, where the cooling system consists of three parts: pipe joints, rubber pipes and cooling fans. However, as the unit vibrates continuously during operation, the friction of the cooling pipes may cause pipe damage or loose pipe joints, which may cause gear oil leakage. This not only wastes gear oil, but also causes the gearbox to shut down due to high temperature, affecting power generation. In severe cases, it may cause damage to the gearbox.

[0003] Existing fans use oil level monitoring methods. When the temperature, pressure or gearbox oil level fault is reported during the operation of the fan, the operation and maintenance personnel can find out the oil pipe leakage or the gearbox has no oil level during the fault handling. Otherwise, it cannot be discovered in time, resulting in serious waste of gear oil and damage to the gearbox. Summary of the invention

[0004] The invention provides an automatic alarm device for monitoring oil leakage and oil level of a cooling system of a wind turbine generator set, which is used to solve the defects in the prior art.

[0005] The present invention provides an automatic alarm device for monitoring oil leakage and oil level of a cooling system of a wind turbine generator set, comprising: a detection component, wherein the detection component is arranged between the oil outlet end of a gear box of the wind turbine generator set and the oil outlet pipe of the gear box of the wind turbine generator set, the oil inlet end of the gear box of the wind turbine generator set and the oil outlet end of the gear box of the wind turbine generator set are respectively provided with a flow sensor 1 and a flow sensor 2, the flow sensor 1 and the flow sensor 2 are respectively connected to electrical signals of a background data processing system arranged in the outside, an alarm is arranged outside the gear box of the wind turbine generator set, and the alarm is connected to electrical signals of the background data processing system.

[0006] Preferably, the detection assembly includes an adapter box, and an oil inlet joint and an oil outlet joint are respectively provided on the top and side of the adapter box, and the oil inlet joint and the oil outlet joint are respectively connected to the oil outlet end of the wind turbine gearbox and the oil outlet pipe of the wind turbine gearbox.

[0007] Preferably, an oil passage cavity is provided in the adapter box, a limit plate is fixedly arranged in the oil passage cavity, a limit groove is respectively provided on the limit plate and an inner wall of one side of the oil passage cavity, a buoy is provided between the limit plate and an inner wall of one side of the oil passage cavity, a limit block is respectively provided at both ends of the buoy, two limit blocks are respectively clamped in two limit grooves, a displacement sensor is provided on the outer side of the top of the adapter box, a displacement sensing part is provided on the top of the inner wall of the adapter box, the displacement sensor is electrically connected to the displacement sensing part, and a A contact sensor, a fixed sleeve is provided at the bottom of the inner wall of the adapter box, a moving rod is provided in the middle of the fixed sleeve, a damping layer is provided between the fixed sleeve and the moving rod, a sealing layer is provided between the moving rod and the bottom of the adapter box, one end of the moving rod extends into the oil passage cavity, the other end of the moving rod is outside the adapter box, a contact sensing part is provided on the top of the moving rod in the oil passage cavity, the contact sensing part is electrically connected to the contact sensor, and the contact sensor and the displacement sensor are respectively connected to electrical signals of a background data processing system.

[0008] Preferably, the diameters of the oil inlet joint and the oil outlet joint are the same as the diameters of the oil outlet end of the wind turbine gearbox and the oil outlet pipe of the wind turbine gearbox.

[0009] Preferably, it also includes:

[0010] Wind speed detection module, used to measure the wind speed borne by the impeller of the wind turbine;

[0011] Speed ​​detection module 1, used to measure the rotation speed of the pinion in the gearbox of the wind turbine;

[0012] Speed ​​detection module 2 is used to measure the rotation speed of the large gear in the gearbox of the wind turbine;

[0013] Power detection module, used to measure the real-time input power of the wind turbine gearbox;

[0014] An alarm module, used for issuing an alarm;

[0015] A calculation module 1 is used to calculate the limit input power of the wind turbine gearbox based on the wind speed borne by the wind turbine impeller;

[0016] A processing module, used for comparing the limit input power of the wind turbine gearbox obtained by the calculation module 1 with the real-time input power of the wind turbine gearbox;

[0017] The control module controls the alarm to sound an alarm and controls the wind turbine to stop working when the real-time input power of the wind turbine gearbox is equal to the limit input power of the wind turbine gearbox. When the real-time input power of the wind turbine gearbox is less than the limit input power of the wind turbine gearbox, the wind turbine works normally.

[0018] Preferably, the calculation module 1 calculates based on the following formula 1:

[0019]

[0020] P is the maximum input power of the wind turbine gearbox, n1 is the speed of the small gear in the gearbox, n2 is the speed of the large gear in the gearbox, R1 is the pitch circle radius, R2 is the radius of the impeller, μ1 is the viscosity of the gear oil, μ2 is the air viscosity, Z is the width of the gear, π is the pi, V is the wind speed, C is the wind energy utilization coefficient, ρ1 is the density of the lubricating oil, and ρ2 is the air density. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the method provided by an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the adapter box provided by an embodiment of the present invention.

[0024] Reference numerals:

[0025] 1. Wind turbine gearbox; 11. Oil outlet pipe; 12. Oil outlet end; 2. Detection component; 21. Adapter box; 22. Oil inlet connector; 23. Oil outlet connector; 24. Oil passage chamber; 25. Limit plate; 26. Limit groove; 27. Float; 28. Limit block; 29. ​​Displacement sensor; 30. Displacement sensing part; 31. Contact sensor; 32. Contact sensing part; 33. Fixed sleeve; 34. Moving rod; 35. Damping layer; 36. Sealing layer. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] The present invention provides the following embodiments

[0029] Example 1

[0030] The embodiment of the present invention provides an automatic alarm device for monitoring oil leakage and oil level of a wind turbine cooling system. Figure 1-Figure 2 As shown, it includes: a detection component 2, the detection component 2 is arranged between the oil outlet end 12 of the wind turbine gearbox 1 and the oil outlet pipe 11 of the wind turbine gearbox 1, the oil inlet end of the wind turbine gearbox 1 and the oil outlet end 12 of the wind turbine gearbox 1 are respectively provided with a flow sensor 1 and a flow sensor 2, the flow sensor 1 and the flow sensor 2 are respectively connected to the background data processing system arranged in the outside by electrical signals, the outside of the wind turbine gearbox 1 is provided with an alarm, and the alarm is connected to the background data processing system by electrical signals.

[0031] The working principle and beneficial effects of the above technical solution are as follows: the large gear and the small gear in the wind turbine gearbox 1 mesh to transmit the torque. In order to ensure the smooth meshing of the large gear and the small gear, gear oil needs to be added for lubrication. The gear oil flows from the oil outlet end 12 of the wind turbine gearbox 1 through the detection component 2 and is discharged from the oil outlet pipe 11 of the wind turbine gearbox 1. The flow sensor 1 and the flow sensor 2 respectively monitor and record the gear oil flow rates flowing into and out of the oil inlet end 12 of the wind turbine gearbox 1 and the oil outlet end 12 of the wind turbine gearbox 1. The data collected by the flow sensor 1 and the flow sensor 2 are uploaded to the background data processing system through electrical signals for comparison and processing. When the flow detected by the flow sensor 1 and the flow detected by the flow sensor 2 are different from the preset value, and when the flow detected by the flow sensor 1 is greater than the flow detected by the flow sensor 2, The background data processing system determines that the gear oil is leaking, and the background data processing system controls the alarm to issue a leakage alarm. At the same time, the detection component 2 detects the gear fluid flowing through, and synchronously monitors and warns the oil level in the wind turbine gearbox 1. When the detection component 2 detects that the oil level in the wind turbine gearbox 1 is at the preset lowest position, the background data processing system controls the alarm to issue an oil shortage alarm. The alarm device is mainly composed of a flow sensor and background software. By installing a flow sensor at the gear box oil inlet and outlet pipe 11 joints, the gear oil flow in the pipeline is monitored in real time, and the data is transmitted to the background software to set a range. When the gear oil flow at the oil inlet and outlet pipe 11 pipe joints differs from the range or the flow is less than the set value, the background software will alarm the wind turbine in real time to shut down the operation and maintenance personnel to board the machine for inspection, which facilitates the maintenance of the wind turbine.

[0032] Example 2

[0033] On the basis of Example 1, Figure 1-Figure 2 As shown, the detection component 2 includes an adapter box 21, and the top and side of the adapter box 21 are respectively provided with an oil inlet connector 22 and an oil outlet connector 23, and the oil inlet connector 22 and the oil outlet connector 23 are respectively connected to the oil outlet end 12 of the wind turbine gearbox 1 and the oil outlet pipe 11 of the wind turbine gearbox 1.

[0034] The working principle and beneficial effects of the above technical solution are as follows: the gear oil in the wind turbine gearbox 1 flows into the adapter box 21 from the oil inlet joint 22, and then flows out from the oil outlet joint 23 to the oil outlet pipe 11 of the wind turbine gearbox 1 after detection, which facilitates the unimpeded flow of the gear oil and facilitates the disassembly, assembly and maintenance of the detection component 2 when a fault occurs.

[0035] Example 3

[0036] On the basis of Example 2, Figure 1-Figure 2As shown, an oil passage chamber 24 is provided in the adapter box 21, a limit plate 25 is fixedly arranged in the oil passage chamber 24, a limit groove 26 is respectively provided on the limit plate 25 and the inner wall of one side of the oil passage chamber 24, a buoy 27 is provided between the limit plate 25 and the inner wall of one side of the oil passage chamber 24, a limit block 28 is respectively provided at both ends of the buoy 27, and two limit blocks 28 are respectively clamped in the two limit grooves 26, a displacement sensor 29 is provided on the outer side of the top of the adapter box 21, a displacement sensing part 30 is provided on the top of the inner wall of the adapter box 21, and the displacement sensor 29 is electrically connected to the displacement sensing part 30, and a connection is provided on the outer side of the bottom of the adapter box 21 A touch sensor 31 is provided with a fixed sleeve 33 at the bottom of the inner wall of the adapter box 21, a moving rod 34 is provided in the middle of the fixed sleeve 33, a damping layer 35 is provided between the fixed sleeve 33 and the moving rod 34, a sealing layer 36 is provided between the moving rod 34 and the bottom of the adapter box 21, one end of the moving rod 34 extends into the oil passage cavity 24, and the other end of the moving rod 34 is outside the adapter box 21, a contact sensing part 32 is provided on the top of the moving rod 34 in the oil passage cavity 24, the contact sensing part 32 is electrically connected to the contact sensor 31, and the contact sensor 31 and the displacement sensor 29 are respectively connected to the electrical signals of the background data processing system.

[0037] The working principle and beneficial effects of the above technical solution are as follows: the gear oil flowing into the adapter box 21 enters the oil passage chamber 24, the limit plate 25 and the limit groove 26 opened on the inner wall of the adapter box 21 limit the buoy 27 in the vertical direction, the buoy 27 floats on the gear oil liquid surface in the oil passage chamber 24, the adapter box 21 fixes the displacement sensing part 30 and the contact sensor 31, the displacement sensing part 30 of the displacement sensor 29 detects the distance of the buoy 27 and transmits the information to the displacement sensor 29, the displacement sensor 29 transmits the information to the background data processing system through the electrical signal, when the gear oil liquid level drops, the buoy 27 contacts the contact sensing part 32 below, which means that the gear oil The liquid level reaches the preset lowest position and transmits the information to the contact sensor 31, and the contact sensor 31 transmits the information to the background data processing system through the electrical signal. The inner wall of the adapter box 21 fixes the fixed sleeve 33, and the bottom of the adapter box 21 and the fixed sleeve 33 limit the moving rod 34. The damping layer 35 in the fixed sleeve 33 prevents the moving rod 34 from moving up and down at will in the fixed sleeve 33. The sealing layer 36 prevents the gear oil in the oil chamber 24 from leaking through the part connected to the moving rod 34. The height of the moving rod 34 in the oil chamber 24 can be adjusted by manually applying force to the part of the moving rod 34 outside the adapter box 21, thereby adjusting the preset lowest position of the gear oil in the oil chamber 24.

[0038] Example 4

[0039] On the basis of Example 3, Figure 1-Figure 2 As shown, the diameters of the oil inlet joint 22 and the oil outlet joint 23 are the same as the diameters of the oil outlet end 12 of the wind turbine gearbox 1 and the oil outlet pipe 11 of the wind turbine gearbox 1 .

[0040] The working principle and beneficial effects of the above technical solution are as follows: the diameters of the oil inlet connector 22 and the oil outlet connector 23 are the same as the oil outlet end 12 of the wind turbine gearbox 1 and the oil outlet pipe 11 of the wind turbine gearbox 1, which reduces the change in the flow rate of the gear oil due to the oil passage when the gear oil enters and exits the detection component 2, thereby affecting the detection accuracy of the flow sensor 2.

[0041] Example 5

[0042] On the basis of Example 4, it also includes:

[0043] Wind speed detection module, used to measure the wind speed borne by the impeller of the wind turbine;

[0044] The rotation speed detection module 1 is used to measure the rotation speed of the pinion in the wind turbine gearbox 1;

[0045] The second speed detection module is used to measure the rotation speed of the large gear in the wind turbine gearbox 1;

[0046] A power detection module is used to measure the real-time input power of the wind turbine gearbox 1;

[0047] A calculation module 1 is used to calculate the limit input power of the wind turbine gearbox 1 based on the wind speed borne by the wind turbine impeller;

[0048] A processing module, used for comparing the limit input power of the wind turbine gearbox 1 obtained by the calculation module 1 with the real-time input power of the wind turbine gearbox 1;

[0049] The control module controls the alarm to sound an alarm and controls the wind turbine to stop working when the real-time input power of the wind turbine gearbox 1 is equal to the limit input power of the wind turbine gearbox 1; and the wind turbine works normally when the real-time input power of the wind turbine gearbox 1 is less than the limit input power of the wind turbine gearbox 1.

[0050] The working principle and beneficial effects of the above technical solution are as follows: the wind speed detection module measures the wind speed borne by the wind turbine impeller, the speed detection module 1 measures the rotation speed of the small gear in the wind turbine gearbox 1, the speed detection module 2 measures the rotation speed of the large gear in the wind turbine gearbox 1, the power detection module measures the real-time input power of the wind turbine gearbox 1, the calculation module 1 calculates the limit input power of the wind turbine gearbox 1 based on the wind speed borne by the wind turbine impeller, the processing module is used to compare and process the limit input power of the wind turbine gearbox 1 obtained by the calculation module 1 with the real-time input power of the wind turbine gearbox 1, when the real-time input power of the wind turbine gearbox 1 is equal to the limit input power of the wind turbine gearbox 1, the control module controls the alarm to sound an alarm and controls the wind turbine to stop working at the same time, when the real-time input power of the wind turbine gearbox 1 is less than the limit input power of the wind turbine gearbox 1, the wind turbine works normally.

[0051] Example 6

[0052] Based on Example 5,

[0053] The calculation module 1 calculates based on the following formula 1:

[0054]

[0055] P is the limit input power of the wind turbine gearbox 1, n1 is the speed of the small gear in the gearbox, n2 is the speed of the large gear in the gearbox, R1 is the pitch circle radius, R2 is the radius of the impeller, μ1 is the viscosity of the gear oil, μ2 is the air viscosity, Z is the width of the gear, π is the pi, V is the wind speed, C is the wind energy utilization coefficient, ρ1 is the density of the lubricating oil, and ρ2 is the air density.

[0056] The working principle and beneficial effects of the above technical solution are: Calculate the oil-gas mixture density by Calculate the viscosity of the oil-gas mixture by The limit input power of the wind turbine gearbox 1 is calculated. When the real-time input power of the wind turbine gearbox 1 is equal to the limit input power of the wind turbine gearbox 1, the control module controls the alarm to sound an alarm and controls the wind turbine to stop working. When the real-time input power of the wind turbine gearbox 1 is less than the limit input power of the wind turbine gearbox 1, the wind turbine works normally.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic alarm device for monitoring oil leakage and oil level in a wind turbine cooling system, characterized in that: include: A detection component (2), the detection component (2) being arranged between an oil outlet end (12) of the wind turbine gearbox (1) and an oil outlet pipe (11) of the wind turbine gearbox (1), the oil inlet end of the wind turbine gearbox (1) and the oil outlet end (12) of the wind turbine gearbox (1) being respectively provided with a flow sensor 1 and a flow sensor 2, the flow sensor 1 and the flow sensor 2 being respectively connected to an externally provided background data processing system by electrical signals, an alarm being arranged outside the wind turbine gearbox (1), the alarm being connected to the background data processing system by electrical signals.

2. The oil leakage and oil level monitoring automatic alarm device for the cooling system of a wind turbine according to claim 1 is characterized in that: The detection assembly (2) comprises an adapter box (21), the top and side of the adapter box (21) are respectively provided with an oil inlet joint (22) and an oil outlet joint (23), the oil inlet joint (22) and the oil outlet joint (23) are respectively connected to the oil outlet end (12) of the wind turbine gear box (1) and the oil outlet pipe (11) of the wind turbine gear box (1).

3. The oil leakage and oil level monitoring automatic alarm device for the cooling system of a wind turbine according to claim 2 is characterized in that: An oil passage chamber (24) is provided in the adapter box (21), a limit plate (25) is fixedly arranged in the oil passage chamber (24), a limit groove (26) is respectively arranged on the limit plate (25) and the inner wall of one side of the oil passage chamber (24), a buoy (27) is arranged between the limit plate (25) and the inner wall of one side of the oil passage chamber (24), a limit block (28) is respectively arranged at both ends of the buoy (27), and the two limit blocks (28) are respectively clamped in the two limit grooves (26), a displacement sensor (29) is arranged on the outer side of the top of the adapter box (21), a displacement sensing part (30) is arranged on the top of the inner wall of the adapter box (21), the displacement sensor (29) is electrically connected to the displacement sensing part (30), and a contact sensor (29) is arranged on the outer side of the bottom of the adapter box (21). The adapter box (21) comprises a fixed sleeve (33) at the bottom of the inner wall of the adapter box (21), a moving rod (34) in the middle of the fixed sleeve (33), a damping layer (35) between the fixed sleeve (33) and the moving rod (34), a sealing layer (36) between the moving rod (34) and the bottom of the adapter box (21), one end of the moving rod (34) extends into the oil passage cavity (24), the other end of the moving rod (34) is outside the adapter box (21), a contact sensing part (32) is provided on the top of the moving rod (34) in the oil passage cavity (24), the contact sensing part (32) is electrically connected to the contact sensor (31), and the contact sensor (31) and the displacement sensor (29) are respectively connected to the background data processing system for electrical signals.

4. The oil leakage and oil level monitoring automatic alarm device for the cooling system of a wind turbine according to claim 3 is characterized in that: The diameters of the oil inlet joint (22) and the oil outlet joint (23) are the same as the diameters of the oil outlet end (12) of the wind turbine gearbox (1) and the oil outlet pipe (11) of the wind turbine gearbox (1).

5. The oil leakage and oil level monitoring automatic alarm device for the cooling system of a wind turbine generator set according to claim 4, characterized in that: Also includes: Wind speed detection module, used to measure the wind speed borne by the impeller of the wind turbine; A rotation speed detection module 1, used for measuring the rotation speed of a small gear in a wind turbine gearbox (1); A second rotation speed detection module is used to measure the rotation speed of the large gear in the gear box (1) of the wind turbine generator set; A power detection module, used for measuring the real-time input power of the wind turbine gearbox (1); A calculation module 1, used for calculating the limit input power of the wind turbine gearbox (1) based on the wind speed borne by the wind turbine impeller; A processing module, used for comparing the limit input power of the wind turbine gearbox (1) obtained by the calculation module 1 with the real-time input power of the wind turbine gearbox (1); The control module controls the alarm device to sound an alarm and simultaneously controls the wind turbine to stop working when the real-time input power of the wind turbine gearbox (1) is greater than or equal to the limit input power of the wind turbine gearbox (1); and the wind turbine operates normally when the real-time input power of the wind turbine gearbox (1) is less than the limit input power of the wind turbine gearbox (1).

6. The automatic alarm device for monitoring oil leakage and oil level of a wind turbine cooling system according to claim 5, characterized in that: The calculation module 1 calculates based on the following formula 1: P is the limit input power of the wind turbine gearbox (1), n1 is the speed of the small gear in the gearbox, n2 is the speed of the large gear in the gearbox, R1 is the pitch circle radius, R2 is the radius of the impeller, μ1 is the viscosity of the gear oil, μ2 is the air viscosity, Z is the width of the gear, π is the circumference, V is the wind speed, C is the wind energy utilization coefficient, ρ1 is the density of the lubricating oil, and ρ2 is the air density.

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