Oil leakage warning device and method for yaw system of fan

Abstract

The oil leakage warning device comprises oil collecting frames installed on the periphery of yaw brakes, and the number of the oil collecting frames is matched with the number of the yaw brakes; the oil collecting frame is formed by splicing a first half oil collecting frame and a second half oil collecting frame; a first oil guide groove is formed in the first half oil collecting frame, a second oil guide groove is formed in the second half oil collecting frame, the first oil guide groove is communicated with a first oil guide branch pipe, the second oil guide groove is communicated with a second oil guide branch pipe, the first oil guide branch pipe and the second oil guide branch pipe are communicated with the input end of a sub oil collecting bottle, and a sub liquid level sensor is arranged in the sub oil collecting bottle. Each branch liquid level sensor correspondingly monitors the oil leakage condition of one yaw brake, the output ends of all the branch oil bottles are communicated with an oil guide header pipe, the oil guide header pipe is communicated with a main oil collection bottle, and a concentrated liquid level sensor is arranged in the main oil collection bottle. Through real-time monitoring of the branch liquid level sensor and the centralized liquid level sensor, the oil leakage problem of the yaw brake can be found in time.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to an oil leakage alarm device and method for a wind turbine yaw system. Background Art

[0002] At present, the industry generally uses the oil level sensor in the hydraulic station to alarm when detecting oil leakage in the yaw system of the wind turbine. Because the yaw brake of the wind turbine will switch between the three states of braking, residual pressure yaw, and unwinding during operation, the oil level of the hydraulic station will drop during braking, and the oil level of the hydraulic station will rise during residual pressure yaw and unwinding, resulting in the failure to timely alarm when the yaw system leaks oil. When the monitoring background reports the oil leakage of the wind turbine yaw, the yaw system of the wind turbine has been leaking oil for a long time, and the oil in the hydraulic station has leaked and is almost gone. The leaked hydraulic oil often flows to the tower platforms, tower walls, climbing devices, ladders and tower bottom equipment. The oil stains on the ladders greatly increase the safety hazards of climbing wind turbines. Because the leaked hydraulic oil contaminates a wide area, it takes a lot of time and consumes a lot of rags and cleaning agents to clean it up, resulting in increased downtime of the wind turbine and increased economic losses. The yaw brake of the wind turbine cannot be braked, which increases the safety hazards of the unit.

[0003] In summary, the main technical problems to be solved by the present invention are: in the existing wind turbine yaw system, oil leakage monitoring usually relies on manual inspection and cannot achieve real-time monitoring, resulting in delayed discovery of oil leakage problems, which may cause equipment failure and safety hazards. Secondly, the existing oil leakage monitoring method is difficult to monitor the oil leakage of multiple yaw brakes at the same time, and multi-point oil leakage problems are difficult to detect and deal with in time. Thirdly, the existing oil leakage monitoring device is inconvenient to install and maintain, especially when the yaw brake installation position is narrow, it is difficult to quickly disassemble and assemble, affecting the normal operation of the equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an oil leakage alarm device and method for a wind turbine yaw system. The present invention can timely detect the oil leakage problem of the yaw brake through real-time monitoring of the partial liquid level sensor and the centralized liquid level sensor; the first half oil collecting frame and the second half oil collecting frame adopt a detachable design, which is convenient for installation and maintenance, especially when the yaw brake installation position is narrow, it can be quickly disassembled and assembled without affecting the normal operation of the equipment.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: An oil leakage alarm device for a wind turbine yaw system comprises an oil collecting frame installed on the periphery of a yaw brake, wherein the number of the oil collecting frames matches the number of the yaw brakes; the oil collecting frame is formed by splicing a first half oil collecting frame and a second half oil collecting frame; The first half oil collecting frame is provided with a first oil guide groove, the second half oil collecting frame is provided with a second oil guide groove, the first oil guide groove is connected with the first oil guide branch pipe, the second oil guide groove is connected with the second oil guide branch pipe, the first oil guide branch pipe and the second oil guide branch pipe are connected with the input end of the sub-oil collecting bottle, a partial liquid level sensor is provided in the sub-oil collecting bottle, each partial liquid level sensor corresponds to monitoring the oil leakage of a yaw brake, the output ends of all the sub-oil collecting bottles are connected with the oil guide main pipe, the oil guide main pipe is connected with the main oil collecting bottle, and the main oil collecting bottle is provided with a centralized liquid level sensor.

[0006] Preferably, the first oil guide groove and the second oil guide groove are connected to form a total oil guide groove, and the total oil guide groove is a wedge-shaped oil guide groove, which is provided with an oil guide slope surface, and the tip of the wedge-shaped oil guide groove abuts against the yaw brake housing and forms a semi-annular oil guide channel with the yaw brake housing.

[0007] Preferably, the first half oil collecting frame and the second half oil collecting frame are symmetrical structures, and the first half oil collecting frame and the second half oil collecting frame are connected at the junction through a magnetic positioning mechanism, and the magnetic positioning mechanism includes a positioning hole, a positioning column and a magnetic ring, the positioning hole and the magnetic ring are located at the end of the first half oil collecting frame, and the magnetic ring is located outside the positioning hole, the positioning column is located at the end of the second half oil collecting frame, and the positioning column is adapted to the positioning hole.

[0008] Preferably, the yaw brake and the oil collecting frame are both on the annular base, and the ends of the first half oil collecting frame and the second half oil collecting frame are detachably connected by a connecting plate, and the connecting plate and the first half oil collecting frame and the second half oil collecting frame form an annular closed frame and enclose the yaw brake, and the connecting plate is located on the outside of the annular base, and the first half oil collecting frame and the second half oil collecting frame are respectively located in the gap between two adjacent yaw brakes.

[0009] Preferably, the ends of the first half oil collecting frame and the second half oil collecting frame are both provided with end baffles and side baffles, and the end baffles and the side baffles are used to prevent oil leakage from the ends of the first half oil collecting frame and the second half oil collecting frame; the first oil guide branch pipe is connected to the bottom of the first half oil collecting frame, and the second oil guide branch pipe is connected to the bottom of the second half oil collecting frame; the first oil guide branch pipe and the second oil guide branch pipe are located below the yaw brake and on the periphery of the annular base.

[0010] Preferably, the output end of the subset oil bottle is provided with a pressure switch valve, and the pressure switch valve is used to open when the oil amount in the subset oil bottle reaches a threshold value.

[0011] Preferably, the first oil guiding branch pipe and the second oil guiding branch pipe are hard pipes, and the output ends of the first oil guiding branch pipe and the second oil guiding branch pipe are vertically downward; the oil guiding main pipe is a soft pipe, and the oil guiding main pipe is connected with all the subset oil collecting bottles through a tee.

[0012] Preferably, a locking device is provided on the connecting plate, and the locking device comprises a base plate connected to the connecting plate, and a locking screw is provided on the base plate, and the locking screw is used to abut against the outer wall of the annular base.

[0013] Preferably, an elastic support rod assembly is provided between two adjacent oil collecting frames, and the elastic support rod assembly comprises an ear plate, a bayonet, an elastic support rod, an elastic member, and a limiting groove; Wherein, the ear plate and the bayonet are installed on the side wall of the first half oil collecting frame, the limit groove is arranged on the side wall of the second half oil collecting frame, the elastic support rod is hinged with the ear plate, and the elastic member is arranged on the elastic support rod; The elastic support rod is used to support between two oil collecting frames or to be clamped on the bayonet.

[0014] A monitoring method for an oil leakage alarm device of a wind turbine yaw system comprises the following steps: Installation method of oil leakage alarm device for wind turbine yaw system: insert the first half oil collecting frame and the second half oil collecting frame through the gaps between the two yaw brakes respectively; use the magnetic ring suction force to suck the first half oil collecting frame and the second half oil collecting frame together, and insert the positioning column into the positioning hole at the same time to prevent the first half oil collecting frame and the second half oil collecting frame from staggering with each other; After the first half oil collecting frame and the second half oil collecting frame are assembled, the connecting plate is installed so that the connecting plate, the first half oil collecting frame and the second half oil collecting frame form a ring-shaped closed frame; By adjusting the locking screw, a single oil collecting frame can be tightly locked with a single yaw brake to prevent the oil collecting frame from loosening, and the inner side of the oil collecting frame can be tightly attached to the outer wall of the yaw brake; After installing the partial liquid level sensor in the sub-oil collecting bottle, connect the sub-oil collecting bottle to the first oil guiding branch pipe and the second oil guiding branch pipe; Then connect the output end of the sub-oil collecting bottle to the oil guide main pipe through a tee; An oil collecting frame and a sub-oil collecting bottle and the matching partial liquid level sensor, the first oil guide branch pipe, the second oil guide branch pipe, and the connecting plate constitute a monitoring unit. After all the monitoring units are installed, all the sub-oil collecting bottles are connected to the main oil collecting bottle through the oil guide main pipe. The main oil collecting bottle is equipped with a centralized liquid level sensor. After all the monitoring units are fixed, the elastic support rod of the elastic support rod assembly is unfolded and pressed against the limit groove of the adjacent detection unit, so that the entire fan yaw system oil leakage alarm device is connected as a whole. Electrically connect all the branch level sensors and centralized level sensors to the monitoring host; The monitoring process of the oil leakage alarm device of the wind turbine yaw system: all monitoring units are numbered, and each number corresponds to a yaw brake with a fixed position; when the partial liquid level sensor of a monitoring unit detects the oil level signal, it proves that the yaw brake of the monitoring unit has an oil leakage problem; When a yaw brake leaks a small amount of oil, a small amount of oil will collect in the sub-oil bottle. The sub-liquid level sensor in the sub-oil bottle will detect the oil leakage and transmit the oil level signal to the monitoring host; At the same time, the oil collection bottle can temporarily collect the leaked oil. In a short period of time, the leaked oil will not enter the oil guide pipe and will not pollute the oil guide pipe. When the centralized liquid level sensor does not detect a signal, it proves that the oil leakage problem is not serious and the amount of oil leakage is small. If the oil leakage continues to increase or multiple yaw brakes leak at the same time, and the staff does not deal with it in time, when the weight of the oil reaches a certain threshold, the pressure switch valve opens and the oil enters the oil main pipe, which collects the leaked oil into the total oil collecting bottle. When the centralized liquid level sensor in the total oil collecting bottle detects oil leakage, it proves that the oil leakage is relatively large and needs to be dealt with in time.

[0015] The present invention can achieve the following beneficial effects: 1. The present invention can timely detect the oil leakage of the yaw brake through real-time monitoring of the partial liquid level sensor and the centralized liquid level sensor; the monitoring host promptly issues visual and sound alarms based on the oil level signal and the oil level change rate to remind the operator to deal with the oil leakage problem and avoid equipment failure and safety hazards caused by the oil leakage.

[0016] 2. The present invention can monitor the oil leakage of multiple yaw brakes at the same time, and can accurately identify and record oil leakage even if multiple locations leak at the same time.

[0017] 3. The oil collection bottle can temporarily collect a small amount of leaked oil to prevent the leaked oil from directly entering the oil guide pipe, reduce the pollution to the oil guide pipe, and extend the service life of the equipment. When the oil leakage reaches a certain threshold, the pressure switch valve opens and the oil enters the oil guide pipe, ensuring that the oil leakage can be collected and processed in time when it is large, reducing environmental pollution and maintenance costs.

[0018] 4. The first half oil collecting frame and the second half oil collecting frame are detachable, which is convenient for installation and maintenance. Especially when the installation position of the yaw brake is narrow, they can be quickly disassembled and assembled without affecting the normal operation of the equipment.

[0019] 5. The first half of the oil collecting frame and the second half of the oil collecting frame are sucked together through the magnetic positioning mechanism to ensure the stability and reliability of the installation.

[0020] 6. Multiple monitoring units are connected into a whole through the elastic support rod assembly to improve the stability of the entire device and prevent a single monitoring unit from loosening. The elastic support rod assembly provides tension to prevent a single monitoring unit from shaking and improve the stability of the entire system.

[0021] 7. This method integrates multiple monitoring units to realize real-time monitoring and alarm of oil leakage of multiple yaw brakes in the wind turbine yaw system. It has the characteristics of efficient monitoring, accurate oil leakage estimation, multi-point oil leakage analysis, reduced pollution and maintenance costs, easy installation and maintenance, improved system stability and data recording and analysis, etc., which significantly improves the safety and reliability of the wind turbine yaw system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is an installation effect diagram of the oil leakage alarm device for the yaw system of a wind turbine of the present invention (top view effect diagram); Figure 2 for Figure 1 A in the enlarged view; Figure 3 This is an installation effect diagram of the oil leakage alarm device for the yaw system of a fan of the present invention (an effect diagram viewed from above); Figure 4 for Figure 3 A magnified view of point B in FIG. Figure 5 This is a three-dimensional structural diagram of the oil leakage alarm device for the fan yaw system of the present invention (the effect diagram of the device installed on a ring base); Figure 6 For the present invention Figure 5 The enlarged view of point C in the figure; Figure 7 It is a structural diagram of the first half oil collecting frame and the second half oil collecting frame of the present invention in a separated state; Figure 8 This is a structural diagram of the elastic support rod assembly of the present invention.

[0023] In the figure: the first half oil collecting frame 1, the second half oil collecting frame 2, the wedge-shaped oil guide groove 3, the magnetic positioning mechanism 4, the positioning hole 401, the positioning column 402, the magnetic ring 403, the connecting plate 5, the end baffle 6, the side baffle 7, the first oil guide branch pipe 801, the second oil guide branch pipe 802, the sub-oil collecting bottle 9, the oil guide main pipe 10, the yaw brake 11, the annular base 12, the locking device 13, the elastic support rod assembly 14, the ear plate 14.1, the bayonet 14.2, the elastic support rod 14.3, and the elastic member 14.4. DETAILED DESCRIPTION

[0024] The preferred solution is Figures 1 to 8 As shown, an oil leakage alarm device for a wind turbine yaw system includes an oil collecting frame installed on the periphery of a yaw brake 11, and the number of the oil collecting frames matches the number of the yaw brakes 11; the oil collecting frame is composed of a first half oil collecting frame 1 and a second half oil collecting frame 2 spliced ​​together; The first half oil collecting frame 1 is provided with a first oil guide groove, and the second half oil collecting frame 2 is provided with a second oil guide groove. The first oil guide groove is connected to the first oil guide branch pipe 801, and the second oil guide groove is connected to the second oil guide branch pipe 802. The first oil guide branch pipe 801 and the second oil guide branch pipe 802 are connected to the input end of the sub-oil collecting bottle 9. A partial liquid level sensor is provided in the sub-oil collecting bottle 9. Each partial liquid level sensor corresponds to monitoring the oil leakage of a yaw brake 11. The output ends of all sub-oil collecting bottles 9 are connected to the oil guide main pipe 10, and the oil guide main pipe 10 is connected to the main oil collecting bottle. A centralized liquid level sensor is provided in the main oil collecting bottle. The first half oil collecting frame 1 and the second half oil collecting frame 2 are preferably made of metal. A magnet can be installed at the connection between the first half oil collecting frame 1 and the second half oil collecting frame 2 to attract the first half oil collecting frame 1 and the second half oil collecting frame 2 together.

[0025] Furthermore, the first oil guide groove and the second oil guide groove are connected to form a total oil guide groove, and the total oil guide groove is a wedge-shaped oil guide groove 3, and the wedge-shaped oil guide groove 3 is provided with an oil guide slope surface, and the tip of the wedge-shaped oil guide groove 3 is against the outer shell of the yaw brake 11, and forms a semi-annular oil guide channel with the outer shell of the yaw brake 11. The purpose of the wedge-shaped oil guide groove 3 designed in the present invention is to quickly guide the leaked oil into the sub-oil collection bottle 9. The reason is: compared with the traditional groove structure, under the same volume of oil, the oil is more likely to gather at the bottom of the semi-annular oil guide channel, and in a short time, the oil level of the semi-annular oil guide channel will increase rapidly, so that the oil will be easier to enter the sub-oil collection bottle 9. In addition, the wedge-shaped oil guide groove 3 needs to form a channel with the outer shell of the yaw brake 11, so that when the yaw brake 11 leaks oil, the oil will flow into the semi-annular oil guide channel along the outer shell of the yaw brake 11, and will not leak to other positions.

[0026] Furthermore, the first half oil collecting frame 1 and the second half oil collecting frame 2 are symmetrical structures, and the first half oil collecting frame 1 and the second half oil collecting frame 2 are connected at their junctions by a magnetic attraction positioning mechanism 4, wherein the magnetic attraction positioning mechanism 4 comprises a positioning hole 401, a positioning column 402 and a magnetic ring 403, wherein the positioning hole 401 and the magnetic ring 403 are located at the end of the first half oil collecting frame 1, and the magnetic ring 403 is located outside the positioning hole 401, and the positioning column 402 is located at the end of the second half oil collecting frame 2, and the positioning column 402 is adapted to the positioning hole 401. The first half oil collecting frame 1 and the second half oil collecting frame 2 are designed as detachable structures for the following reasons: the installation position of the yaw brake 11 is narrow, and there are many yaw brakes 11. When an oil leakage accident occurs in a yaw brake 11, it is necessary to inspect and repair a yaw brake 11 separately. Since the device is installed outside the yaw brake 11, if the device is not easy to disassemble, it will affect the inspection and repair progress of the yaw brake 11, so the device needs to meet the requirements of easy installation and easy disassembly. Furthermore, the yaw brake 11 and the oil collecting frame are both on the annular base 12, and the ends of the first half oil collecting frame 1 and the second half oil collecting frame 2 are detachably connected through the connecting plate 5, and the connecting plate 5 and the first half oil collecting frame 1 and the second half oil collecting frame 2 form an annular closed frame and enclose the yaw brake 11, and the connecting plate 5 is located outside the annular base 12, and the first half oil collecting frame 1 and the second half oil collecting frame 2 are respectively located in the gap between two adjacent yaw brakes 11. During installation, the first half oil collecting frame 1 and the second half oil collecting frame 2 are respectively installed from the gap, and the first half oil collecting frame 1 and the second half oil collecting frame 2 are sucked together by the magnetic ring 403, and the positioning column 402 is inserted into the positioning hole 401. After the first half oil collecting frame 1 and the second half oil collecting frame 2 are assembled, the connecting plate 5 is installed, so that the connecting plate 5 and the first half oil collecting frame 1 and the second half oil collecting frame 2 form an annular closed frame. The technical solution of the present invention is used to achieve the following purpose: the installer can install the oil collecting frame from the outside of the annular base 12, thereby preventing the inside of the annular base 12 from being blocked by other equipment.

[0027] Further, the ends of the first half oil collecting frame 1 and the second half oil collecting frame 2 are both provided with end baffles 6 and side baffles 7, which are used to prevent oil from leaking from the ends of the first half oil collecting frame 1 and the second half oil collecting frame 2; the first oil guiding branch pipe 801 is connected to the bottom of the first half oil collecting frame 1, and the second oil guiding branch pipe 802 is connected to the bottom of the second half oil collecting frame 2; the first oil guiding branch pipe 801 and the second oil guiding branch pipe 802 are located below the yaw brake 11 and outside the annular base 12. The first oil guiding branch pipe 801 and the second oil guiding branch pipe 802 are installed to bypass the installation position of the yaw brake 11.

[0028] Furthermore, a pressure switch valve is provided at the output end of the sub-oil bottle 9, and the pressure switch valve is used to open when the oil volume of the sub-oil bottle 9 reaches a threshold value. The design purpose of the pressure switch valve is that when a small amount of oil leaks from a certain yaw brake 11, a small amount of oil will be collected in the sub-oil bottle 9, and the partial liquid level sensor in the sub-oil bottle 9 will detect the oil leakage. At the same time, the sub-oil bottle 9 can temporarily collect the leaked oil, and the leaked oil will not enter the oil guide main pipe 10 in a short time, and will not pollute the oil guide main pipe 10. If the amount of oil leakage continues to increase, and the staff does not handle it in time, when the weight of the oil reaches a certain threshold, the pressure switch valve will open, and the oil will enter the oil guide main pipe 10, and the oil guide main pipe 10 will collect the leaked oil into the main oil collection bottle, and the capacity of the main oil collection bottle is much larger than that of the sub-oil bottle 9. When the centralized liquid level sensor in the main oil collection bottle detects oil leakage, it proves that the amount of oil leakage is relatively large.

[0029] Furthermore, the first oil guiding branch pipe 801 and the second oil guiding branch pipe 802 are hard pipes, and the output ends of the first oil guiding branch pipe 801 and the second oil guiding branch pipe 802 are vertically downward; the oil guiding main pipe 10 is a soft pipe, and the oil guiding main pipe 10 is connected to all the sub-oil collecting bottles 9 through a tee. After the first half oil collecting frame 1 and the second half oil collecting frame 2 are installed and fixed, the sub-oil collecting bottles 9 are plugged into the output ends of the first oil guiding branch pipe 801 and the second oil guiding branch pipe 802.

[0030] Furthermore, a locking device 13 is provided on the connecting plate 5, and the locking device 13 includes a base plate connected to the connecting plate 5, and a locking screw is provided on the base plate, and the locking screw is used to abut against the outer wall of the annular base 12. After the first half oil collecting frame 1 and the second half oil collecting frame 2 are fixed to the connecting plate 5, a single oil collecting frame and a single yaw brake 11 can be tightly locked by adjusting the locking screw to prevent the oil collecting frame from loosening, and the inner side of the oil collecting frame can be tightly attached to the outer wall of the yaw brake 11.

[0031] Furthermore, an elastic support rod assembly 14 is provided between two adjacent oil collecting frames, and the elastic support rod assembly 14 includes an ear plate 14.1, a bayonet 14.2, an elastic support rod 14.3, an elastic member 14.4 and a limiting groove; The ear plate 14.1 and the bayonet 14.2 are installed on the side wall of the first half oil collecting frame 1, the limit groove is arranged on the side wall of the second half oil collecting frame 2, the elastic support rod 14.3 is hinged to the ear plate 14.1, and the elastic member 14.4 is arranged on the elastic support rod 14.3; The elastic support rod 14.3 is used to be supported between the two oil collecting frames or to be clamped on the bayonet 14.2.

[0032] The entire wind turbine yaw system oil leakage alarm device of the present invention is composed of multiple monitoring units, each monitoring unit includes an oil collecting frame and a sub-oil collecting bottle 9 and a matching partial liquid level sensor, a first oil guide branch pipe 801, a second oil guide branch pipe 802, a connecting plate 5, etc. Each monitoring unit is used to monitor a yaw brake 11, and each oil collecting frame is fixed to a yaw brake 11 separately. In order to improve the stability of the entire device and avoid oil leakage caused by loosening of a single monitoring unit, the present invention designs an elastic support rod assembly 14. When all the monitoring units are fixed, the elastic support rod 14.3 of the elastic support rod assembly 14 is unfolded and abutted against the limit groove of the adjacent detection unit, so that the entire device is connected as a whole. If a monitoring unit is loose, the elastic member 14.4 will provide a tension to avoid shaking of the single monitoring unit.

[0033] If a single monitoring unit needs to be repaired, the corresponding elastic support rod 14.3 can be retracted separately, which is convenient for contact restriction.

[0034] A monitoring method for an oil leakage alarm device of a wind turbine yaw system comprises the following steps: 1. Installation method of oil leakage alarm device for fan yaw system: Step 1.1: Insert the first half oil collecting frame 1 and the second half oil collecting frame 2 into the gaps between the two yaw brakes 11 respectively.

[0035] Step 1.2: Use the suction force of the magnetic ring 403 to suck the first half oil collecting frame 1 and the second half oil collecting frame 2 together, and insert the positioning column 402 into the positioning hole 401 to ensure that the first half oil collecting frame 1 and the second half oil collecting frame 2 will not stagger with each other.

[0036] Step 1.3: After the first half oil collecting frame 1 and the second half oil collecting frame 2 are assembled, the connecting plate 5 is installed so that the connecting plate 5 and the first half oil collecting frame 1 and the second half oil collecting frame 2 form an annular closed frame.

[0037] Step 1.4: Tightly lock a single oil collecting frame and a single yaw brake 11 by adjusting the locking screws to prevent the oil collecting frame from loosening, and ensure that the inner side of the oil collecting frame is tightly attached to the outer wall of the yaw brake 11.

[0038] Step 1.5: After installing the partial liquid level sensor in the sub-oil collection bottle 9, connect the sub-oil collection bottle 9 to the first oil guide branch pipe 801 and the second oil guide branch pipe 802.

[0039] Step 1.6: Connect the output end of the oil collecting bottle 9 to the oil guide main pipe 10 through a tee.

[0040] Step 1.7: An oil collecting frame and a sub-oil collecting bottle 9 and the matching partial liquid level sensor, a first oil guiding branch pipe 801, a second oil guiding branch pipe 802, and a connecting plate 5 constitute a monitoring unit.

[0041] Step 1.8: After all monitoring units are installed, all sub-oil collecting bottles 9 are connected to the main oil collecting bottle through the oil guide pipe 10, and a centralized liquid level sensor is arranged in the main oil collecting bottle.

[0042] Step 1.9: After all monitoring units are fixed, the elastic support rod 14.3 of the elastic support rod assembly 14 is unfolded and pressed against the limit groove of the adjacent detection unit, so that the entire wind turbine yaw system oil leakage alarm device is connected into a whole.

[0043] Step 1.10: Electrically connect all the branch level sensors and centralized level sensors to the monitoring host.

[0044] 2. Monitoring process of oil leakage alarm device of wind turbine yaw system: Step 2.1: Number all monitoring units, and each number corresponds to a yaw brake 11 with a fixed orientation.

[0045] Numbering method: A digital numbering method is adopted, for example, the yaw brake 11 is numbered from 1 to N in sequence, and each number corresponds to a monitoring unit. For example, monitoring unit 1 corresponds to yaw brake 1, monitoring unit 2 corresponds to yaw brake 2, and so on.

[0046] Step 2.2: When the partial liquid level sensor of a certain monitoring unit detects an oil level signal, it proves that the yaw brake 11 of the monitoring unit has an oil leakage problem.

[0047] Step 2.3: The partial liquid level sensor transmits the oil level signal to the monitoring host, and the monitoring host records and displays the serial number and oil leakage of the yaw brake 11.

[0048] Step 2.4: When a small amount of oil leaks from a yaw brake 11, a small amount of oil will be collected in the oil collection bottle 9. The partial liquid level sensor in the oil collection bottle 9 will detect the oil leakage and transmit the oil level signal to the monitoring host.

[0049] Step 2.5: The oil collection bottle 9 can temporarily collect the leaked oil. The leaked oil will not enter the main oil pipe 10 in a short period of time, and will not pollute the main oil pipe 10.

[0050] Step 2.6: If the oil leakage continues to increase or multiple yaw brakes 11 leak oil at the same time, and the staff does not handle it in time, when the weight of the oil reaches a certain threshold, the pressure switch valve in the subset oil bottle 9 opens.

[0051] Step 2.7: The oil will enter the oil guide main pipe 10, and the oil guide main pipe 10 will collect the leaked oil into the total oil collection bottle.

[0052] Step 2.8: When the centralized liquid level sensor in the total oil collecting bottle detects oil leakage, it proves that the amount of oil leakage is relatively large and needs to be dealt with in time.

[0053] Step 2.9: The centralized liquid level sensor transmits the oil level signal to the monitoring host, which records and displays the oil level of the total oil collection bottle and issues an alarm signal.

[0054] 3. Logical method of oil spill analysis: Step 3.1: After the sub-liquid level sensor detects the oil level signal, it transmits the signal to the monitoring host.

[0055] Step 3.2: The monitoring host records the oil level signal of each monitoring unit and makes a preliminary judgment. If the oil level exceeds the preset threshold, the monitoring host marks the monitoring unit as a potential oil leakage unit.

[0056] Step 3.3: The monitoring host records the oil level change trend of each monitoring unit. If the oil level continues to rise, it means that the oil leakage is getting worse.

[0057] Step 3.4: The monitoring host calculates the oil level change rate using the following formula: ; Where ΔH is the change in oil level and Δt is the time interval.

[0058] Step 3.5: The monitoring host estimates the amount of oil leakage based on the oil level change rate and the volume of the subset oil bottle 9. The formula is as follows: Oil leakage = oil level change rate × volume of the sub-oil bottle × Δt; Step 3.6: If multiple monitoring units detect oil leakage signals at the same time, the monitoring host will mark these units as multi-point oil leakage units.

[0059] Step 3.7: The monitoring host calculates the total oil leakage, the formula is as follows: ; Where N is the number of monitoring units that detected the oil leak, and the amount of oil leaked i The oil leakage volume is the oil leakage volume of the ith monitoring unit.

[0060] Step 3.8: The monitoring host decides whether to issue an alarm signal based on the amount and speed of oil leakage.

[0061] The oil leakage of a single monitoring unit exceeds the preset threshold.

[0062] Multiple monitoring units detect oil leakage at the same time, and the total oil leakage exceeds the preset threshold.

[0063] The oil leakage rate exceeds the preset threshold.

[0064] Step 3.9: The monitoring host sends out an alarm signal, including visual and sound alarms, to prompt the operator to deal with the oil leak in time.

[0065] Step 3.10: The monitoring host records the alarm information, including the oil leakage unit number, oil leakage amount, oil leakage speed and alarm time, for subsequent analysis and processing.

[0066] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A fan yaw system oil leakage alarm device, characterized in that: It comprises an oil collecting frame installed on the periphery of the yaw brake (11), the number of the oil collecting frames matching the number of the yaw brakes (11); the oil collecting frame is formed by splicing a first half oil collecting frame (1) and a second half oil collecting frame (2); A first oil guide groove is provided on the first half oil collecting frame (1), and a second oil guide groove is provided on the second half oil collecting frame (2). The first oil guide groove is in communication with a first oil guide branch pipe (801), and the second oil guide groove is in communication with a second oil guide branch pipe (802). The first oil guide branch pipe (801) and the second oil guide branch pipe (802) are in communication with an input end of a sub-oil collecting bottle (9). A partial liquid level sensor is provided in the sub-oil collecting bottle (9), and each partial liquid level sensor is used to monitor the oil leakage of a yaw brake (11). The output ends of all sub-oil collecting bottles (9) are in communication with an oil guide main pipe (10), and the oil guide main pipe (10) is in communication with a main oil collecting bottle. A centralized liquid level sensor is provided in the main oil collecting bottle.

2. The oil leakage alarm device for the yaw system of a wind turbine according to claim 1, characterized in that: The first oil guide groove and the second oil guide groove are connected to form a total oil guide groove, wherein the total oil guide groove is a wedge-shaped oil guide groove (3), the wedge-shaped oil guide groove (3) is provided with an oil guide slope surface, the tip of the wedge-shaped oil guide groove (3) abuts against the outer shell of the yaw brake (11), and forms a semi-annular oil guide channel with the outer shell of the yaw brake (11).

3. The oil leakage alarm device for a wind turbine yaw system according to claim 1 or 2, characterized in that: The first half oil collecting frame (1) and the second half oil collecting frame (2) are symmetrical structures. The first half oil collecting frame (1) and the second half oil collecting frame (2) are connected at their junction via a magnetic positioning mechanism (4). The magnetic positioning mechanism (4) comprises a positioning hole (401), a positioning column (402) and a magnetic ring (403). The positioning hole (401) and the magnetic ring (403) are located at an end of the first half oil collecting frame (1), and the magnetic ring (403) is located outside the positioning hole (401). The positioning column (402) is located at an end of the second half oil collecting frame (2), and the positioning column (402) is matched with the positioning hole (401).

4. The oil leakage alarm device for the yaw system of a wind turbine according to claim 3, characterized in that: The yaw brake (11) and the oil collecting frame are both on an annular base (12); the ends of the first half oil collecting frame (1) and the second half oil collecting frame (2) are detachably connected via a connecting plate (5); the connecting plate (5) and the first half oil collecting frame (1) and the second half oil collecting frame (2) form an annular closed frame and enclose the yaw brake (11); the connecting plate (5) is located outside the annular base (12); the first half oil collecting frame (1) and the second half oil collecting frame (2) are respectively located at a gap between two adjacent yaw brakes (11).

5. The oil leakage alarm device for the yaw system of a wind turbine according to claim 4, characterized in that: End baffles (6) and side baffles (7) are provided at the ends of the first half oil collecting frame (1) and the second half oil collecting frame (2), and the end baffles (6) and the side baffles (7) are used to prevent oil from leaking from the ends of the first half oil collecting frame (1) and the second half oil collecting frame (2); the first oil guide branch pipe (801) is connected to the bottom of the first half oil collecting frame (1), and the second oil guide branch pipe (802) is connected to the bottom of the second half oil collecting frame (2); the first oil guide branch pipe (801) and the second oil guide branch pipe (802) are located below the yaw brake (11) and outside the annular base (12).

6. The oil leakage alarm device for the yaw system of a wind turbine according to claim 1, characterized in that: The output end of the subset oil collection bottle (9) is provided with a pressure switch valve, and the pressure switch valve is used to open when the oil volume of the subset oil collection bottle (9) reaches a threshold value.

7. The oil leakage alarm device for a wind turbine yaw system according to claim 1, characterized in that: The first oil guiding branch pipe (801) and the second oil guiding branch pipe (802) are hard pipes, and the output ends of the first oil guiding branch pipe (801) and the second oil guiding branch pipe (802) are vertically downward; the main oil guiding pipe (10) is a soft pipe, and the main oil guiding pipe (10) is connected to all the sub-oil collecting bottles (9) through a tee.

8. The oil leakage alarm device for the yaw system of a wind turbine according to claim 4, characterized in that: A locking device (13) is provided on the connecting plate (5), and the locking device (13) comprises a base plate connected to the connecting plate (5), and a locking screw is provided on the base plate, and the locking screw is used to abut against the outer wall of the annular base (12).

9. The oil leakage alarm device for a wind turbine yaw system according to claim 1, characterized in that: An elastic support rod assembly (14) is provided between two adjacent oil collecting frames, and the elastic support rod assembly (14) comprises an ear plate (14.1), a bayonet (14.2), an elastic support rod (14.3), an elastic member (14.4) and a limiting groove; The ear plate (14.1) and the bayonet (14.2) are installed on the side wall of the first half oil collecting frame (1), the limit groove is arranged on the side wall of the second half oil collecting frame (2), the elastic support rod (14.3) is hinged to the ear plate (14.1), and the elastic member (14.4) is arranged on the elastic support rod (14.3); The elastic support rod (14.3) is used to be supported between the two oil collecting frames or to be clamped on the bayonet (14.2).

10. The monitoring method of the oil leakage alarm device of the wind turbine yaw system according to claim 1 is characterized in that The following steps are involved: Installation method of an oil leakage alarm device for a fan yaw system: insert the first half oil collecting frame (1) and the second half oil collecting frame (2) respectively through the gap between two yaw brakes (11); use the suction force of a magnetic ring (403) to suck the first half oil collecting frame (1) and the second half oil collecting frame (2) together, and insert a positioning column (402) into a positioning hole (401) to prevent the first half oil collecting frame (1) and the second half oil collecting frame (2) from being offset from each other; After the first half oil collecting frame (1) and the second half oil collecting frame (2) are assembled, the connecting plate (5) is installed so that the connecting plate (5) and the first half oil collecting frame (1) and the second half oil collecting frame (2) form an annular closed frame; By adjusting the locking screw, a single oil collecting frame and a single yaw brake (11) can be tightly locked to prevent the oil collecting frame from loosening, and the inner side of the oil collecting frame can be tightly attached to the outer wall of the yaw brake (11); After the partial liquid level sensor in the sub-oil collecting bottle (9) is installed, the sub-oil collecting bottle (9) is connected to the first oil guiding branch pipe (801) and the second oil guiding branch pipe (802); Then, the output end of the sub-oil collecting bottle (9) is connected to the oil guide main pipe (10) through a tee; An oil collecting frame and a sub-oil collecting bottle (9) and a matching partial liquid level sensor, a first oil guide branch pipe (801), a second oil guide branch pipe (802), and a connecting plate (5) form a monitoring unit. When all the monitoring units are installed, all the sub-oil collecting bottles (9) are connected to the main oil collecting bottle through the main oil guide pipe (10), and a centralized liquid level sensor is provided in the main oil collecting bottle. After all the monitoring units are fixed, the elastic support rod (14.3) of the elastic support rod assembly (14) is unfolded and pressed against the limit groove of the adjacent detection unit, so that the entire fan yaw system oil leakage alarm device is connected into a whole. Electrically connect all the branch level sensors and centralized level sensors to the monitoring host; The monitoring process of the oil leakage alarm device of the wind turbine yaw system is as follows: all monitoring units are numbered, and each number corresponds to a yaw brake (11) at a fixed position; when the partial liquid level sensor of a certain monitoring unit detects an oil level signal, it is proved that the yaw brake (11) of the monitoring unit has an oil leakage problem; When a yaw brake (11) leaks a small amount of oil, a small amount of oil will be collected in the sub-oil collection bottle (9), and the partial liquid level sensor in the sub-oil collection bottle (9) will detect the oil leakage and transmit the oil level signal to the monitoring host; At the same time, the oil collecting bottle (9) can temporarily collect the leaked oil, and the leaked oil will not enter the oil guide main pipe (10) in a short period of time, and will not pollute the oil guide main pipe (10); when the centralized liquid level sensor does not detect a signal, it proves that the oil leakage problem is not serious and the amount of oil leakage is small; If the amount of oil leakage continues to increase or oil leakage occurs simultaneously in multiple yaw brakes (11), and if the staff does not handle it in time, when the weight of the oil reaches a certain threshold, the pressure switch valve opens and the oil flows into the oil guide main pipe (10). The oil guide main pipe (10) collects the leaked oil into the total oil collection bottle. When the centralized liquid level sensor in the total oil collection bottle detects oil leakage, it proves that the amount of oil leakage is relatively large and needs to be handled in time.

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