Automatic lubrication and waste oil collection control system and method for wind generating set

Abstract

The invention discloses an automatic lubrication and waste oil collection control system and method for a wind generating set, the system comprises an oil injection device, a waste oil collection device and a measurement control device, and the oil injection device is used for injecting a lubricating medium into the wind generating set; the waste oil collecting device is used for collecting and storing waste oil; the measurement control device is connected with the oil injection device and the waste oil collecting device through an electrical control loop and used for controlling the oil injection device and the waste oil collecting device to act synchronously, so that the oil injection device and the waste oil collecting device are started and stopped simultaneously to inject a lubricating medium for lubricating the wind turbine generator; the measurement control device can further judge whether oil leakage happens to the wind turbine generator or not according to the amount of oil injected by the oil injection device and the amount of waste oil collected by the waste oil collecting device, and meanwhile the measurement control device can further detect the oil amount of lubricating equipment in the wind turbine generator and give an alarm according to the detection result. Waste oil can be prevented from being deposited in the bearing, and it is ensured that new oil is fully injected into the wind turbine generator.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine generator sets, and in particular to an automatic lubrication and waste oil collection control system and method for wind turbine generator sets. Background Art

[0002] The automatic lubrication system of wind turbine generator sets currently mainly adopts periodic intermittent pressure injection lubrication, but the setting of this timed, fixed-point and quantitative lubrication mode does not take into account the actual operating status of the yaw and pitch bearings of the unit. After running for a period of time, the old oil will be unable to be discharged and deposited in the bearings, which makes it difficult to inject new grease and easy to leak from the bearing seals. On the other hand, it is difficult to achieve the lubrication effect, so that the bearings are often in an under-lubricated state. In addition, due to the deposition and blockage caused by the above-mentioned old oil slabs, the new oil is prone to grease leakage during the injection process, causing environmental pollution, and is not conducive to the reliability of the bearing and affects the service life of the bearing. Summary of the invention

[0003] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a wind turbine automatic lubrication and waste oil collection control system and method, which can prevent waste oil from being deposited in the bearings of the wind turbine and ensure that new oil can be fully injected into the wind turbine. At the same time, it can also avoid grease overflow, reduce grease waste, avoid environmental pollution, and ensure that the wind turbine is fully lubricated. It can ensure the service life and reliability of the bearings, thereby ensuring the service life of the wind turbine, improving the power generation efficiency of the wind turbine, and ensuring the power generation quality.

[0004] The technical solution of the present invention is as follows:

[0005] In a first aspect, the present invention provides a wind turbine automatic lubrication and waste oil collection control system, comprising:

[0006] An oil injection device, the oil injection device is used to inject lubricating medium into the wind turbine;

[0007] A waste oil collection device, wherein the waste oil collection device is used to collect and store waste oil in the wind turbine;

[0008] A measuring control device, wherein the measuring control device is connected to the oil injection device and the waste oil collection device through an electrical control circuit, and is used to control the oil injection device and the waste oil collection device to act synchronously, so that the oil injection device and the waste oil collection device can be started and stopped at the same time to inject lubricating medium into the wind turbine for lubrication. The measuring control device can also determine whether the wind turbine has oil leakage according to the amount of oil injected by the oil injection device and the amount of waste oil collected by the waste oil collection device. At the same time, the measuring control device can also detect the amount of oil in the lubrication equipment in the wind turbine and issue an alarm according to the detection result.

[0009] Furthermore, in the above-mentioned automatic lubrication and waste oil collection control system for a wind turbine generator set, the oil injection device comprises:

[0010] An electric lubrication pump, which is connected to the distributor via a connecting pipeline, and is used to pump lubricating medium into the wind turbine for lubrication. An overflow valve and a liquid level sensor are provided on the electric lubrication pump, and the overflow valve is used for safety protection and pressure control, so that the electric lubrication pump can adjust the pressure and flow of the lubricating medium under the control of the measurement and control device, and the liquid level sensor is used to detect the amount of remaining lubricating medium in the electric lubrication pump;

[0011] A distributor, one end of which is connected to the electric lubrication pump or the upper distributor through a connecting pipe; the other end is connected to a quick-insert oil filling connector through a connecting pipe, and then connected to the bearing oil filling hole for oil filling;

[0012] A quick-insert oil filling connector, which is connected to the distributor via a connecting pipe, and a plug of the quick-insert oil filling connector is directly connected to the bearing oil filling hole and is quickly connected to the bearing oil filling hole;

[0013] A pressure detection device is provided on the distributor and is used to detect the pressure of the lubricating medium in the pipeline of the oil injection device.

[0014] Furthermore, in the above-mentioned automatic lubrication and waste oil collection control system for wind turbine generator set, the waste oil collection device comprises:

[0015] A negative pressure oil suction device, the negative pressure oil suction device is arranged at each oil discharge hole of the wind turbine bearing, the oil suction port of the negative pressure oil suction device is sealed and connected with each of the oil discharge holes, and the oil suction port of the negative pressure oil suction device receives the signal transmitted by the measurement and control device to perform oil suction;

[0016] A waste oil storage device, wherein the waste oil storage device is sealed and connected to the oil outlet of the negative pressure oil suction device, and is used to store the grease absorbed by the negative pressure oil suction device, and detect the liquid level signal and grease quantity signal of the stored waste oil through a detection device, and sound an alarm when a preset capacity or a preset liquid level is reached.

[0017] Furthermore, in the above-mentioned automatic lubrication and waste oil collection control system for a wind turbine generator set, the negative pressure oil suction device includes a negative pressure oil suction nozzle.

[0018] Furthermore, in the above-mentioned automatic lubrication and waste oil collection control system for a wind turbine generator set, a weight sensor is provided on the waste oil storage device for detecting the weight of the waste oil in the waste oil storage device.

[0019] Furthermore, in the above-mentioned automatic lubrication and waste oil collection control system for a wind turbine generator set, the waste oil storage device includes one or more of a decentralized waste oil storage device, a semi-integrated waste oil storage device and an integrated waste oil storage device, wherein:

[0020] The decentralized waste oil storage device is fixedly arranged at each oil drain hole;

[0021] The semi-integrated waste oil storage device is fixed together by multiple oil drain holes, including a single bearing equipped with two or more waste oil storage devices;

[0022] The integrated waste oil storage device is fixed together by using a plurality of oil drain holes, including a single bearing equipped with only one waste oil storage device.

[0023] Furthermore, in the above-mentioned automatic lubrication and waste oil collection control system for a wind turbine generator set, the measurement and control device includes any one of a main control chip, an industrial control computer and a control system.

[0024] In a second aspect, the present invention provides a method for controlling automatic lubrication and waste oil collection of a wind turbine generator set, comprising:

[0025] Determine the operating status of the wind turbine;

[0026] If the wind turbine is in operation, the lubrication mode is set according to the standard that the yaw action duration of the wind turbine is a preset value;

[0027] If the wind turbine is not in operation, it shall be periodically oiled once a week, and the total annual oil injection volume shall be one third of the total oil injection volume in the operating state.

[0028] Furthermore, in the above-mentioned automatic lubrication and waste oil collection control method for a wind turbine generator set, if the wind turbine generator set is in operation, the lubrication mode is set in combination with the standard of the yaw action duration of the wind turbine generator set as a preset value, including:

[0029] If the annual grease injection amount / lubrication pump flow of the wind turbine is greater than the preset value, the wind turbine will continue to inject oil during the pitch or yaw action process;

[0030] If the annual grease injection amount / lubrication pump flow rate of the wind turbine is less than or equal to the preset value, the wind turbine pitch or yaw action process will be lubricated according to the preset time interval;

[0031] The lubrication mode is set as a preset value based on the standard setting of the yaw action duration of the wind turbine generator set, and is automatically switched according to the theoretical required oiling time of the wind turbine generator set. The switching execution process includes:

[0032] Detect the yaw or pitch action signal of the wind turbine. If the action signal is detected, the oil injection and waste oil suction actions are started. The oil injection and waste oil suction actions include:

[0033] Determine whether the cumulative oil injection time of the unit on that day is less than or equal to the preset single-day oil injection time. If so, the wind turbine unit is oiled and the oil injection time is counted. Otherwise, no oil injection is performed.

[0034] If the continuous oil injection time of the oil injection reaches 1 minute, determine whether to stop the oil injection according to the current working mode of the wind turbine set; if it does not reach 1 minute, oil injection is carried out according to the preset time or preset oil injection amount;

[0035] Among them, in the above-mentioned oil filling process, if the remaining time of the day is less than or equal to the time difference between the preset single-day oil filling time and the cumulative oil filling time of the unit on the day, the oil filling is started, and the oil filling time is the preset single-day oil filling time-the cumulative oil filling time of the day;

[0036] During the whole process of wind turbine operation, the injected oil is continuously checked for leakage, and whether the wind turbine is in shutdown mode is also checked. If so, the shutdown time of the wind turbine is accumulated. If the shutdown time is less than the preset time, the wind turbine executes the operating state program normally and performs periodic oil injection. Otherwise, the non-operating state and its corresponding oil injection mode are started.

[0037] The main advantages of the technical solution of the present invention are as follows:

[0038] The invention discloses an automatic lubrication and waste oil collection control system for a wind turbine generator set. New grease is injected into the wind turbine generator set through an oil injection device, waste oil in the wind turbine generator set is collected through a waste oil collection device, and the oil injection device and the waste oil collection device are controlled to work through a measuring and control device, so that they can start and stop at the same time to realize oil injection and waste oil recovery. This can avoid waste oil deposition in the bearings of the wind turbine generator set, and also avoid overflow caused by excessive oil injection, thereby reducing grease waste and environmental pollution. Through sufficient oil injection, the wind turbine generator set can be fully lubricated. Combined with waste oil recovery, the service life and reliability of the bearings can be ensured, thereby ensuring the service life of the wind turbine generator set, improving the power generation efficiency of the wind turbine generator set, and ensuring the power generation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 This is a schematic diagram of the overall structure of an automatic lubrication and waste oil collection control system for a wind turbine generator set according to an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of the structure of an oil injection device in an automatic lubrication and waste oil collection control system for a wind turbine generator set provided by one embodiment of the present invention;

[0042] Figure 3 A schematic diagram of the structure of a waste oil collection device in an automatic lubrication and waste oil collection control system for a wind turbine generator set provided by one embodiment of the present invention;

[0043] Figure 4 A schematic diagram of a semi-integrated waste oil collection device in an automatic lubrication and waste oil collection control system for a wind turbine generator set provided by one embodiment of the present invention;

[0044] Figure 5 A schematic diagram of an integrated waste oil collection device in an automatic lubrication and waste oil collection control system for a wind turbine generator set provided by one embodiment of the present invention;

[0045] Figure 6 A schematic flow chart of a method for controlling automatic lubrication and waste oil collection of a wind turbine generator set provided by one embodiment of the present invention;

[0046] Figure 7 A schematic diagram of a method for automatic lubrication and waste oil collection control of a wind turbine generator set provided by one embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 10. Oil injection device;

[0049] 101. Electric lubrication pump; 102. Distributor; 103. Quick-plug oil filling connector; 104. Pressure testing equipment;

[0050] 20. Waste oil collection device;

[0051] 201. Negative pressure oil suction device; 202. Distributed waste oil storage device; 203. Semi-integrated waste oil storage device; 204. Integral waste oil storage device;

[0052] 30. Measurement control device. DETAILED DESCRIPTION

[0053] 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 specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only 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 making creative work are within the scope of protection of the present invention.

[0054] The following is combined with Figure 1-7, describes in detail the technical solution provided by the embodiments of the present invention.

[0055] As attached Figure 1-5 As shown, an embodiment of the present invention provides a wind turbine automatic lubrication and waste oil collection control system, the system comprising: an oil injection device 10, a waste oil collection device 20 and a measurement control device 30, wherein:

[0056] The oil injection device 10 is used to inject lubricating medium into the wind turbine set; the waste oil collection device 20 is used to collect and store waste oil in the wind turbine set; the measuring and controlling device 30 is connected to the oil injection device 10 and the waste oil collection device 20 through an electrical control circuit, and is used to control the oil injection device 10 and the waste oil collection device 20 to move synchronously, so that the oil injection device 10 and the waste oil collection device 20 can be started and stopped at the same time to inject lubricating medium into the wind turbine set for lubrication. The measuring and controlling device 30 can also judge whether the wind turbine set has oil leakage according to the amount of oil injected by the oil injection device 10 and the amount of waste oil collected by the waste oil collection device 20. At the same time, the measuring and controlling device 30 can also detect the amount of oil in the lubricating equipment in the wind turbine set and give an alarm according to the detection result.

[0057] Since the lubricating medium is easily deposited on the bearing, it is difficult to inject new grease and it is easy to leak from the bearing seal, making it difficult to achieve the lubrication effect. In addition, since the bearing is not fully lubricated when the old lubricating medium is deposited, it is in an under-lubricated state, resulting in poor bearing reliability, reduced bearing service life and the overall service life of the wind turbine, which in turn causes wear of the wind turbine. Therefore, a negative pressure oil suction device 201 is provided on the bearing to enable the transmission system of the entire wind turbine to remain lubricated and unobstructed.

[0058] The above-mentioned lubricating medium includes grease.

[0059] The embodiments of the present invention use grease or lubricating oil as the lubricating medium to describe the technical solution of the present invention in detail.

[0060] Specifically, the oiling device 10 lubricates all transmission parts of the wind turbine, such as gears, axles and their bearings, and the waste oil collection is to absorb and collect the grease or lubricating oil deposited in the bearings of the wind turbine in the form of negative pressure, such as the yaw and pitch bearings of the wind turbine and the grease-lubricated main shaft bearings, but the waste oil collection does not include the gears and axles that are oiled by the above-mentioned oiling device.

[0061] Specifically, the oil injection device 10 in the automatic lubrication and waste oil collection control system of the wind turbine generator set of the present invention comprises: an electric lubrication pump 101, a distributor 102, a quick-insert oil injection connector 103, and a pressure detection device 104, wherein:

[0062] The electric lubrication pump 101 is connected to the distributor 102 through a connecting pipeline, and is used to pump the lubricating medium into the wind turbine for lubrication. An overflow valve and a liquid level sensor are provided on the electric lubrication pump 101. The overflow valve is used for safety protection and pressure control, so that the electric lubrication pump 101 can adjust the pressure and flow of the lubricating medium under the control of the measurement and control device 30, and the liquid level sensor is used to detect the amount of remaining lubricating medium in the electric lubrication pump 101; one end of the distributor 102 is connected to the electric lubrication pump 101 or the upper distributor through a connecting pipeline; the other end is connected to the quick-insert oil filling connector 103 through a connecting pipeline, and then connected to the bearing oil filling hole for oiling; the quick-insert oil filling connector 103 is connected to the distributor 102 through a connecting pipeline, and the plug of the quick-insert oil filling connector 103 is directly connected to the bearing oil filling hole and is quickly connected to the bearing oil filling hole; the pressure detection device 104 is arranged on the distributor 102, and is used to detect the pressure of the lubricating medium in the pipeline of the oil filling device 10.

[0063] In addition, the electric lubrication pump 101 is also connected to the measurement and control device 30 for detecting the liquid level signal of the electric lubrication pump 101 and the grease quantity signal of the lubrication medium pumped out by the electric lubrication pump 101.

[0064] With such arrangement, the grease pumped out by the electric lubrication pump 101 can be evenly distributed to the transmission equipment of the wind turbine through the distribution of the distributor 102; through the structure of the electric lubrication pump 101, when the grease is pumped out, the pumped out grease can be accurately controlled by the measuring control device 30, and the on and off of the pumped out grease can be timely controlled; through the pressure detection of the pressure detection device 104, the pressure of the oil injection system can be detected, thereby detecting whether the oil injection system is blocked, ensuring that the grease pumped out by the electric lubrication pump 101 can fully lubricate the transmission equipment of the wind turbine.

[0065] It should be noted that the relief valve is a safety relief valve with overpressure protection function. If the system is blocked and the system pressure is higher than the set value, the relief valve will open to release the pressure as a protection, and the grease will overflow back to the oil tank.

[0066] As some optional implementation methods of the present embodiment, in order to avoid wasting the pumped grease, a feedback mechanism can also be implemented through the above-mentioned structure. For example, the above-mentioned pressure device is electrically connected to the above-mentioned measurement and control device 30. When the pressure detection device 104 detects the pressure of the grease in the dispenser 102, the detected pressure data is transmitted to the measurement and control device. The measurement and control device compares the pressure data according to a pre-stored pressure threshold or an externally transmitted or called pressure threshold. When the pressure threshold is equal to or exceeds the pressure threshold, the above-mentioned measurement and control device controls the electric lubrication pump 101 to stop pumping oil, thereby reducing the electric lubrication pump 101 from pumping out excess grease, reducing the waste of grease, and avoiding environmental pollution caused by excess leakage of grease.

[0067] As another optional implementation of this embodiment, an alarm mechanism may also be provided in the above-mentioned feedback regulation. For example, when the grease pressure detected by the above-mentioned pressure detection device 104 is too large, after the pressure signal is transmitted to the measurement and control device, the measurement and control device controls the electric lubrication pump 101 to stop pumping oil and issues an alarm to remind the operator to monitor or perform the next corresponding operation.

[0068] Specifically, in the automatic lubrication and waste oil collection control system of the wind turbine generator set of the present invention, the waste oil collection device 20 includes: a negative pressure oil suction device 201 and a waste oil storage device, wherein:

[0069] The negative pressure oil suction device 201 is arranged at each oil discharge hole of the wind turbine bearing, and the oil suction port of the negative pressure oil suction device 201 is sealed and connected to each oil discharge hole, and the oil suction port of the negative pressure oil suction device 201 receives the signal transmitted by the measuring and control device 30 to perform oil suction action; in addition, the waste oil storage device is sealed and connected to the oil outlet of the negative pressure oil suction device 201, and the waste oil storage device is used to store the oil absorbed by the negative pressure oil suction device 201, and detects the liquid level signal and the oil quantity signal of the stored waste oil through the detection equipment, and alarms when the preset capacity or preset liquid level is reached.

[0070] In some optional implementations of the present embodiment, the negative pressure oil suction device 201 includes a negative pressure oil suction nozzle, and the above-mentioned detection equipment for detecting the liquid level signal and the grease amount signal of the stored waste oil includes a liquid level sensor and the like.

[0071] Such an arrangement can fully absorb the grease deposited in the bearing by means of negative pressure, and does not require external high-pressure equipment. Therefore, the structure is simple, the space occupied is small, the cost is low, and it is also easy to operate and has a good use effect.

[0072] Specifically, in the automatic lubrication and waste oil collection control system of the wind turbine generator set of the present invention, a weight sensor is provided on the waste oil storage device for detecting the weight of the waste oil in the waste oil storage device and issuing early warning information.

[0073] Such arrangement enables the amount of waste oil collected in the waste oil storage device to be detected. When the waste oil storage in the waste oil collection storage device is almost full, the system issues a warning message, and the operation and maintenance personnel can replace the waste oil storage device in time or clean the waste oil to avoid waste oil overflow in the waste oil storage device. At the same time, since the oil filling device 10 and the waste oil collection device 20 are started and stopped at the same time during the oil filling process, it is avoided that the waste oil storage device has no storage position, resulting in the inability to discharge old oil and inject new oil, so that the wind belt unit cannot achieve the lubrication effect, thereby causing the wind turbine unit to wear.

[0074] Specifically, in the wind turbine automatic lubrication and waste oil collection control system of the present invention, the waste oil storage device includes one or more of a decentralized waste oil storage device 202, a semi-integrated waste oil storage device 203 and an integrated waste oil storage device 204, wherein:

[0075] The distributed waste oil storage device 202 is fixedly arranged at each oil drain hole; the semi-integrated waste oil storage device 203 is fixed together by multiple oil drain holes, including a single bearing equipped with two or more distributed waste oil storage devices 202 or semi-integrated waste oil storage devices 203; the integrated waste oil storage device 204 is fixed together by multiple oil drain holes, including a single bearing equipped with only one integrated waste oil storage device 204.

[0076] Specifically, the shape of the waste oil storage device matches the shape of the outer ring of the bearing in which it is located. This arrangement allows the waste oil to be recovered while reducing the space occupied by the waste oil storage device.

[0077] In some optional implementations of this embodiment, the measurement control device 30 includes any one of a main control chip, an industrial control computer and a control system.

[0078] As an example, the measurement and control system is composed of a main control IC, which is connected to the oil injection system and the waste oil recovery system through an electrical control circuit. According to the unit operation status signal, the lubrication system controls the injection of new oil and the reabsorption of waste oil, and analyzes the blockage signal, liquid level signal, grease temperature signal, pressure signal, etc. detected by the sensor, and issues blockage alarms, lubrication pump oil shortage alarms, waste oil cleaning alarms, leakage alarms and other information to remind the operation and maintenance personnel to repair the unit in time. In addition, the measurement and control system can also monitor the oil suction pressure of the waste oil collection system, timely understand the degree of grease condensation and dirtiness, and timely repair the bearings. Based on the amount of new grease injected A in the oil injection system and the amount of waste oil recovery system B (for example, it can be subtotaled annually), analyze whether there is oil leakage in the bearing.

[0079] In summary, the automatic lubrication and waste oil collection control system of a wind turbine generator set of the present invention injects new grease into the wind turbine generator set through the oil injection device 10, collects the waste oil in the wind turbine generator set through the waste oil collection device 20, and controls the oil injection device 10 and the waste oil collection device 20 to work through the measurement and control device 30, so that they can start and stop at the same time to realize the oil injection and waste oil recovery actions, which can avoid the waste oil from being deposited in the bearings of the wind turbine generator set, and also avoid overflow caused by excessive oil injection, reduce the waste of grease and pollution of the environment, and through sufficient oil injection, the wind turbine generator set can be fully lubricated, combined with waste oil recovery, thereby ensuring the service life and reliability of the bearings, thereby ensuring the service life of the wind turbine generator set, improving the power generation efficiency of the wind turbine generator set, and ensuring the power generation quality.

[0080] Second, as Figure 6 As shown, the present invention also provides a method for controlling automatic lubrication and waste oil collection of a wind turbine generator set, the method comprising:

[0081] Determine the operating status of the wind turbine; if the wind turbine is in operation, set the lubrication mode based on the preset duration of the yaw action of the wind turbine; if the wind turbine is not in operation, periodically oil the wind turbine, with the oiling cycle being once a week and the annual total oiling amount being one third of the total oiling amount in operation.

[0082] Specifically, the above-mentioned preset value is the yaw reference duration given in the unit design standard.

[0083] Specifically, if the wind turbine is in operation, the lubrication mode is set according to the standard with the yaw action duration of the wind turbine as the preset value, including:

[0084] If the annual grease injection amount / lubrication pump flow of the wind turbine is greater than the preset value, the wind turbine will continue to be oiled during the pitch or yaw action; if the annual grease injection amount / lubrication pump flow of the wind turbine is less than the preset value, the wind turbine will be oiled according to the preset time interval during the pitch or yaw action.

[0085] The lubrication mode is set as a preset value based on the standard setting of the yaw action duration of the wind turbine generator set, and is automatically switched according to the theoretical required oiling time of the wind turbine generator set. The switching execution process includes:

[0086] Detect the yaw or pitch action signal of the wind turbine. If the action signal is detected, start the oil injection and waste oil suction action. The oil injection and waste oil suction action include: judging whether the cumulative oil injection time of the unit on that day is less than or equal to the preset single-day oil injection time. If so, the wind turbine is oiled and the oil injection time of that time is counted, otherwise no oil injection; if the continuous oil injection time of that time reaches 1 minute, determine whether to stop the oil injection according to the current working mode of the wind turbine, if it does not reach 1 minute, oil injection is carried out according to the preset time or preset oil injection amount; wherein, in the above oil injection process If the remaining time of the day is less than or equal to the time difference between the preset single-day oil injection time and the cumulative oil injection time of the unit on that day, the oil injection is started, and the oil injection time is the preset single-day oil injection time minus the cumulative oil injection time of the day; during the whole operation process of the wind turbine set, the injected oil is continuously detected for leakage, and at the same time, it is detected whether the wind turbine set is in shutdown mode. If so, the shutdown time of the wind turbine set is accumulated. If the shutdown time is less than the preset time, the wind turbine set executes the operating state program normally and performs periodic oil injection. Otherwise, the non-operating state and its corresponding oil injection mode are started.

[0087] For example, in the operating state, assuming that the wind turbine needs to be filled with a fixed amount of oil every day, if it is not completed on the same day, it needs to be filled during the remaining time of the day. For example, 365 liters of oil are filled in a year, 1 liter of oil is filled every day, and 0.5 liters of oil is filled in the morning every day, then the remaining 0.5 liters needs to be filled during the rest of the day.

[0088] More specifically, the method of the invention is further described below in combination with practical applications:

[0089] When oiling the wind turbine generator set, the oiling control mode and time interval are automatically adjusted according to whether the wind turbine generator set is in a continuous working state, and the working mode and non-working mode are set.

[0090] In view of the lubrication requirements of bearings of different types of units, combined with the standard setting that the yaw action duration is 10% of the unit's operating time, the working mode has two different lubrication and oiling methods.

[0091] If the annual grease injection amount / lubrication pump flow rate>10% of the time (360*0.1*24*60=51840min), then adopt method 1: continuous oil injection during the pitch (yaw) action process.

[0092] If the time when the annual grease injection volume / lubricating pump flow rate < 10% (360 * 0.1 * 24 * 60 = 51840 min), then adopt Method 2: Inject grease at intervals during the pitch (yaw) movement process. On the basis of the aforementioned working mode, add a duty cycle coefficient b, and let b = required grease injection time / 51840. When the pitch (yaw) signal is detected for the first time every day, stop injecting grease regardless of whether it is in the pitch or yaw process after continuously injecting grease for a specified time. Inject grease again only when the interval duration is greater than the threshold preset by the program and the pitch (yaw) signal is detected (stop the pitch or yaw movement or stop injecting grease when the specified time is reached, whichever comes first). Only inject grease once for yaw movements with close time.

[0093] If it is detected that the unit is in the shutdown state, start the lubricating grease injection method in the non-working mode.

[0094] The schematic diagram of the specific control method is as attached Figure 7 shown.

[0095] Among them, parameter A is the cumulative grease injection volume of the grease injection system; parameter B is the cumulative waste oil recovery volume of the waste oil recovery system; a is the set leakage determination threshold, which is a dimensionless ratio value, 0 < a < 1. When a is close to 0, it means that there is almost no lubricating oil leakage in the bearing. When a is close to 1, it means that the lubricating oil leakage in the bearing is serious; on the premise of resetting and re-counting every year, b = required grease injection time / 51840 min. t0 is the cumulative grease injection duration on the current day; tt is the cumulative shutdown duration of this time; ts is the maximum single shutdown duration allowed without switching to the shutdown mode; T = annual grease injection volume / lubricating pump flow rate / 360, that is, the theoretical grease injection duration per day; t1 is the grease injection duration of this time, and j is the intermittent duration of this time.

[0096] Specifically, for the working mode (or operating mode):

[0097] 1) Detect the yaw (pitch) signal of the main control IC of the unit. If there is an action signal, start grease injection and waste oil suction.

[0098] 2) The cumulative grease injection time of the unit on the current day is t0, and the program presets the single-day grease injection time T and the coefficient b. Under the condition that 1 is satisfied, if t0 < T, inject grease and accumulate the grease injection duration of this time. Otherwise, do not inject grease. (Where T = annual grease injection volume / 360 / lubricating pump flow rate);

[0099] 3) If the continuous grease injection time in 2 reaches 1 min, take a forced rest for (1 - b) / b min. After the rest, return to 2. (When b = 1, this step is equivalent to being skipped);

[0100] 4) If the natural time 24 hours - t (that is, the remaining time on the current day) ≤ T - t0 in 2, start grease injection, and the duration is T - t0. (1 grease injection, or it can be adjusted to 2 grease injections)

[0101] 5) The program presets the threshold parameter a, AB / A>a, and issues an early warning feedback, indicating oil leakage. Repairs must be carried out as soon as possible to close the oil leakage point. The early warning can be reset manually.

[0102] 6) Check whether the unit is in shutdown mode. If so, accumulate the shutdown time. If the time is less than the threshold value ts, execute the working mode program normally and inject oil periodically. Otherwise, start the non-working mode.

[0103] Non-working mode: 1 / 3 of the annual grease injection amount is divided into 52 weeks, with grease injection once a week.

[0104] In summary, the automatic lubrication and waste oil collection control method for a wind turbine generator set of the present invention can prevent waste oil from being deposited in the bearings of the wind turbine generator set, and also avoid overflow caused by excessive oil filling, thereby reducing grease waste and environmental pollution. Through sufficient oil filling, the wind turbine generator set can be fully lubricated, and combined with waste oil recovery, the service life and reliability of the bearings can be ensured, thereby ensuring the service life of the wind turbine generator set, improving the power generation efficiency of the wind turbine generator set, and ensuring the power generation quality.

[0105] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0106] 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. A wind turbine automatic lubrication and waste oil collection control system, characterized in that: include: An oil injection device, the oil injection device is used to inject lubricating medium into the wind turbine; A waste oil collection device, wherein the waste oil collection device is used to collect and store waste oil in the wind turbine; A measuring control device, wherein the measuring control device is connected to the oil injection device and the waste oil collection device through an electrical control circuit, and is used to control the oil injection device and the waste oil collection device to act synchronously, so that the oil injection device and the waste oil collection device can be started and stopped at the same time to inject lubricating medium into the wind turbine for lubrication. The measuring control device can also determine whether the wind turbine has oil leakage according to the amount of oil injected by the oil injection device and the amount of waste oil collected by the waste oil collection device. At the same time, the measuring control device can also detect the amount of oil in the lubrication equipment in the wind turbine and issue an alarm according to the detection result.

2. The automatic lubrication and waste oil collection control system for wind turbine generator set according to claim 1, characterized in that: The oil injection device comprises: An electric lubrication pump, which is connected to the distributor via a connecting pipeline, and is used to pump lubricating medium into the wind turbine for lubrication. An overflow valve and a liquid level sensor are provided on the electric lubrication pump, and the overflow valve is used for safety protection and pressure control, so that the electric lubrication pump can adjust the pressure and flow of the lubricating medium under the control of the measurement and control device, and the liquid level sensor is used to detect the amount of remaining lubricating medium in the electric lubrication pump; A distributor, one end of which is connected to the electric lubrication pump or the upper distributor through a connecting pipe; the other end is connected to a quick-insert oil filling connector through a connecting pipe, and then connected to the bearing oil filling hole for oil filling; A quick-insert oil filling connector, which is connected to the distributor via a connecting pipe, and a plug of the quick-insert oil filling connector is directly connected to the bearing oil filling hole and is quickly connected to the bearing oil filling hole; A pressure detection device is provided on the distributor and is used to detect the pressure of the lubricating medium in the pipeline of the oil injection device.

3. The automatic lubrication and waste oil collection control system for wind turbine generator set according to claim 1, characterized in that: The waste oil collection device comprises: A negative pressure oil suction device, the negative pressure oil suction device is arranged at each oil discharge hole of the wind turbine bearing, the oil suction port of the negative pressure oil suction device is sealed and connected with each of the oil discharge holes, and the oil suction port of the negative pressure oil suction device receives the signal transmitted by the measurement and control device to perform oil suction; A waste oil storage device, wherein the waste oil storage device is sealed and connected to the oil outlet of the negative pressure oil suction device, and is used to store the grease absorbed by the negative pressure oil suction device, and detect the liquid level signal and grease quantity signal of the stored waste oil through a detection device, and sound an alarm when a preset capacity or a preset liquid level is reached.

4. The automatic lubrication and waste oil collection control system for wind turbine generator set according to claim 3, characterized in that: The negative pressure oil suction device comprises a negative pressure oil suction nozzle.

5. The automatic lubrication and waste oil collection control system for wind turbine generator set according to claim 3, characterized in that: A weight sensor is provided on the waste oil storage device for detecting the weight of the waste oil in the waste oil storage device.

6. The automatic lubrication and waste oil collection control system for wind turbine generator set according to claim 1, characterized in that: The waste oil storage device includes one or more of a decentralized waste oil storage device, a semi-integrated waste oil storage device and an integrated waste oil storage device, wherein: The decentralized waste oil storage device is fixedly arranged at each oil drain hole; The semi-integrated waste oil storage device is fixed together by multiple oil drain holes, including a single bearing equipped with two or more waste oil storage devices; The integrated waste oil storage device is fixed together by a plurality of oil drain holes, including a single bearing equipped with only one waste oil storage device.

7. The automatic lubrication and waste oil collection control system for a wind turbine generator set according to claim 1, characterized in that: The measurement and control device includes any one of a main control chip, an industrial control computer and a control system.

8. A method for automatic lubrication and waste oil collection control of a wind turbine generator set, characterized in that: include: Determine the operating status of wind turbines; If the wind turbine is in operation, the lubrication mode is set according to the standard that the yaw action duration of the wind turbine is a preset value; If the wind turbine is not in operation, it shall be periodically oiled once a week, and the total annual oil injection volume shall be one third of the total oil injection volume in the operating state.

9. The automatic lubrication and waste oil collection control method for a wind turbine generator set according to claim 8, characterized in that: If the wind turbine is in operation, the standard lubrication mode with the yaw action duration of the wind turbine as the preset value includes: If the annual grease injection amount / lubrication pump flow of the wind turbine is greater than the preset value, the wind turbine will continue to inject oil during the pitch or yaw action process; If the annual grease injection amount / lubrication pump flow rate of the wind turbine is less than the preset value, the wind turbine pitch or yaw action process will be lubricated according to the preset time interval; The standard setting lubrication mode with the yaw action duration of the wind turbine set as a preset value is automatically switched according to the theoretical required oiling time, and the switching execution process includes: Detect the yaw or pitch action signal of the wind turbine. If the action signal is detected, the oil injection and waste oil suction actions are started. The oil injection and waste oil suction actions include: Determine whether the cumulative oil injection time of the unit on that day is less than or equal to the preset single-day oil injection time. If so, the wind turbine unit is oiled and the oil injection time is counted. Otherwise, no oil injection is performed. If the continuous oil injection time reaches 1 minute, determine whether to stop the oil injection according to the current working mode of the wind turbine. If it does not reach 1 minute, oil injection is carried out according to the preset time or preset oil injection amount. Among them, in the above-mentioned oil filling process, if the remaining time of the day is less than or equal to the time difference between the preset single-day oil filling time and the cumulative oil filling time of the unit on the day, the oil filling is started, and the oil filling time is the preset single-day oil filling time-the cumulative oil filling time of the day; During the whole process of wind turbine operation, the injected oil is continuously checked for leakage, and whether the wind turbine is in shutdown mode is also checked. If so, the shutdown time of the wind turbine is accumulated. If the shutdown time is less than the preset time, the wind turbine executes the operating state program normally and performs periodic oil injection. Otherwise, the non-operating state and its corresponding oil injection mode are started.

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