Grease discharging equipment, wind turbine generator bearing lubricating system and control method and device

Abstract

The invention discloses grease discharging equipment, a wind turbine generator bearing lubricating system and a control method and device.The grease discharging equipment is arranged at an oil discharging hole of a bearing and comprises a motor and a mechanical oil taking device, the mechanical oil taking device comprises an oil discharging rod and an oil collecting mechanism, the first end of the oil discharging rod is connected with the motor, and the second end of the oil discharging rod is connected with the oil collecting mechanism; the second end of the oil discharge rod extends into the oil discharge hole, a flow guide structure is arranged on the surface of the oil discharge rod and used for guiding out grease in the bearing when the oil discharge rod rotates along with the motor, and the oil collecting mechanism is used for collecting the grease guided out by the oil discharge rod. According to the embodiment of the invention, the mechanical oil extraction device is driven to extract oil from the oil discharge hole when the motor rotates in a mechanical oil extraction manner, so that the grease in the bearing is guided out, and the problem that the grease in the bearing cannot be discharged can be effectively solved.

Description

Technical Field

[0001] The present application belongs to the technical field of bearing lubrication, and in particular, relates to a grease discharge device, a wind turbine bearing lubrication system, a control method and a device. Background Art

[0002] Usually, the main bearings, pitch bearings, yaw bearings and other bearings of wind turbines are all lubricated with grease, and each bearing is usually provided with an oil filling hole and an oil drain hole to facilitate the injection and discharge of grease. However, in actual operation, due to the high viscosity of grease and the small diameter of the oil drain hole of the bearing, the oil drain hole is easily blocked, and the grease needs a large pressure to be discharged along the oil drain hole. Therefore, the bearing usually has the problem of poor oil drainage, and in severe cases, it may even cause oil leakage in the seal.

[0003] At present, the wind power industry mainly uses waste grease recovery systems to achieve oil drainage. The principle is to suck out the grease by establishing negative pressure at the oil drain hole of the bearing. However, this method cannot solve the problem of poor oil drainage very well, because the negative pressure system mainly extracts grease by forming a vacuum or a quasi-vacuum environment at the outlet of the oil drain hole. However, the maximum pressure value that can be formed by this method is usually small, which cannot meet the pressure required for the grease to pass through the oil drain passage, so that the waste oil cannot be sucked out by negative pressure, and this method usually cannot avoid clogging of the oil drain hole.

[0004] Therefore, there is an urgent need for a solution that can effectively solve the problem of poor bearing oil drainage. Summary of the invention

[0005] The embodiments of the present application provide a grease discharge device, a wind turbine bearing lubrication system, a control method and a device, which utilize an oil drain rod for mechanical oil extraction and can effectively improve the problem of poor bearing oil drainage.

[0006] In a first aspect, an embodiment of the present application provides a grease discharge device, which is applied to a bearing with an oil discharge hole. The grease discharge device is arranged at the oil discharge hole of the bearing. The grease discharge device includes: a motor and a mechanical oil extraction device;

[0007] The motor rotates to drive the mechanical oil extraction device to extract grease from the oil drain hole;

[0008] The mechanical oil extraction device includes: an oil drain rod and an oil collecting mechanism;

[0009] The first end of the oil drain rod is connected to the motor, and the second end of the oil drain rod extends into the oil drain hole;

[0010] The surface of the oil drain rod is provided with a guide structure, which is used to guide the grease inside the bearing when the oil drain rod rotates with the motor;

[0011] The oil collecting mechanism is used to collect the grease discharged from the oil drain rod.

[0012] As a possible implementation method, the diversion structure includes:

[0013] A guide groove extends spirally from the first end to the second end of the oil drain rod.

[0014] As a possible implementation, the mechanical oil extraction device further includes: a coupling;

[0015] The coupling is arranged between the motor and the first end of the oil drain rod, and is used to connect the motor and the first end of the oil drain rod.

[0016] As a possible implementation manner, the coupling includes an insulating coupling.

[0017] As a possible implementation, the oil collection mechanism includes: an oil drain cover and an oil collection container;

[0018] The oil drain cover includes a first pipe body and a second pipe body;

[0019] One end of the first tube body is connected to the motor, the other end of the first tube body is connected to the oil drain hole, and the oil drain rod and the coupling are arranged inside the first tube body;

[0020] One end of the second tube body is communicated with the first tube body, and the other end of the second tube body is connected to the inlet of the oil collecting container.

[0021] In a second aspect, an embodiment of the present application provides a wind turbine bearing lubrication system, comprising: a sensing device, a control device, a grease filling device, and the grease discharge device of the first aspect;

[0022] The grease filling device is connected to the oil filling hole of the bearing and is used to inject grease into the oil filling hole;

[0023] The sensing device is used to obtain the operating status information of the bearing;

[0024] The control device is connected to the sensing device, the grease filling device and the grease discharge device respectively, and is used to control the operation of the grease filling device and / or the grease discharge device according to the operation status information.

[0025] As a possible implementation method, the grease filling equipment includes:

[0026] Grease pumps, dispenser assemblies and lines;

[0027] The inlet of the distributor assembly is connected to the outlet of the grease pump, and the outlet of the distributor assembly is connected to the oil filling hole through a pipeline, so as to inject the grease output by the grease pump into the oil filling hole;

[0028] The control device is connected with the grease pump and is used for controlling the grease pump.

[0029] As a possible implementation manner, the distributor assembly includes a single-line distributor and / or a progressive distributor.

[0030] As a possible implementation, when the working mode of the wind turbine bearing lubrication system is the first mode, the control device controls the operation of the grease filling device and / or the grease discharge device according to the operating state information of the bearing, including:

[0031] The control device controls the motor in the grease discharge device to start rotating at a first speed in response to determining that the bearing starts rotating according to the operating state information of the bearing;

[0032] The control device controls the grease filling device to start working in response to the continuous rotation time of the motor reaching a first preset time length;

[0033] The control device controls the grease filling device to stop working in response to determining that the bearing stops rotating according to the operating state information of the bearing;

[0034] In response to the bearing stopping rotating for a duration reaching a second preset time, the control device controls the motor to stop rotating.

[0035] As a possible implementation, when the working mode of the wind turbine bearing lubrication system is the second mode, the control device controls the operation of the grease filling device and / or the grease discharge device according to the operating state information of the bearing, including:

[0036] The control device determines the oil injection cycle and the target oil injection amount;

[0037] The control device controls the grease filling device to start filling oil into the oil filling hole at the oil filling start time, wherein the oil filling start time is determined based on the oil filling cycle;

[0038] In response to the oil filling amount of the grease filling device reaching the target oil filling amount, the control device controls the grease filling device to stop filling oil into the oil filling hole;

[0039] The control device controls the motor of the grease discharge device to start rotating at the oil discharge start time, wherein the oil discharge start time is a time before the oil injection start time and a third preset time away from the oil injection start time;

[0040] In response to the duration of the grease filling device stopping filling oil into the oil filling hole reaching a fourth preset time length, the control device controls the motor to stop rotating.

[0041] In a third aspect, an embodiment of the present application provides a method for controlling a bearing lubrication system of a wind turbine generator set, which is applied to a control device in the bearing lubrication system of a wind turbine generator set in the second aspect, and the method includes:

[0042] Obtain the operating status information of the bearing;

[0043] The operation of the grease filling device and / or the grease discharge device is controlled according to the operating status information.

[0044] As a possible implementation method, controlling the operation of the grease filling device and / or the grease discharge device according to the operation status information includes:

[0045] When the working mode of the wind turbine bearing lubrication system is the first mode, in response to determining that the bearing starts to rotate according to the operating state information of the bearing, controlling the motor in the grease discharge device to start rotating at a first speed;

[0046] In response to the duration of the motor rotation reaching a first preset duration, controlling the grease filling device to start working;

[0047] In response to determining that the bearing stops rotating according to the operating state information of the bearing, controlling the grease filling device to stop working;

[0048] In response to the bearing stopping rotating for a duration reaching a second preset time, the motor is controlled to stop rotating.

[0049] As a possible implementation method, controlling the operation of the grease filling device and / or the grease discharge device according to the operation status information includes:

[0050] When the working mode of the wind turbine bearing lubrication system is the second mode, determining the oil filling cycle and target oil filling amount of the bearing;

[0051] Determine the oil filling start time and the oil draining start time according to the oil filling cycle, the oil draining start time being the time before the oil filling start time and the time of the third preset time length from the oil filling start time;

[0052] At the start of oil discharge, the motor controlling the grease discharge device starts to rotate;

[0053] At the start of oil filling, the grease filling device is controlled to start filling oil into the oil filling hole;

[0054] In response to the oil filling amount of the grease filling device reaching the target oil filling amount, controlling the grease filling device to stop filling oil into the oil filling hole;

[0055] In response to the duration of the grease filling device stopping filling oil into the oil filling hole reaching a fourth preset time length, the motor is controlled to stop rotating.

[0056] In a fourth aspect, an embodiment of the present application provides a wind turbine bearing lubrication system control device, which is applied to a control device in the wind turbine bearing lubrication system of the second aspect, and the device includes:

[0057] An acquisition module, used to acquire the operating status information of the bearing;

[0058] The control module is used to control the operation of the grease filling device and / or the grease discharge device according to the operation status information.

[0059] In a fifth aspect, an embodiment of the present application provides an electronic device, the device comprising: a processor and a memory storing computer program instructions;

[0060] When the processor executes the computer program instructions, the control method of the wind turbine bearing lubrication system of the third aspect is implemented.

[0061] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, a control method for a wind turbine bearing lubrication system according to the third aspect is implemented.

[0062] In a seventh aspect, an embodiment of the present application provides a computer program product. When instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the control method for a wind turbine bearing lubrication system as described in the third aspect.

[0063] The grease discharge device, wind turbine bearing lubrication system, control method and device of the embodiment of the present application, the grease discharge device is arranged at the oil discharge hole of the bearing, and includes a motor and a mechanical oil extraction device, the mechanical oil extraction device includes an oil discharge rod and an oil collecting mechanism, the first end of the oil discharge rod is connected to the motor, the second end of the oil discharge rod extends into the oil discharge hole, the surface of the oil discharge rod is provided with a flow guide structure, the flow guide structure is used to guide the grease inside the bearing when the oil discharge rod rotates with the motor, and the oil collecting mechanism is used to collect the grease guided by the oil discharge rod. According to the embodiment of the present application, the mechanical oil extraction method is used to drive the mechanical oil extraction device to extract oil from the oil discharge hole when the motor rotates, and guide the grease inside the bearing, which can effectively solve the problem that the grease inside the bearing cannot be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0065] Figure 1 It is a structural schematic diagram of a grease discharge device provided in an embodiment of the present application;

[0066] Figure 2 It is a structural schematic diagram of an oil drain rod provided in an embodiment of the present application;

[0067] Figure 3 This is a schematic diagram of a connection structure between an oil drain rod and a motor provided in an embodiment of the present application;

[0068] Figure 4 It is a structural schematic diagram of a mechanical oil extraction device provided in an embodiment of the present application;

[0069] Figure 5 It is a structural schematic diagram of a wind turbine bearing lubrication system provided in an embodiment of the present application;

[0070] Figure 6 It is a structural schematic diagram of a grease filling device provided in an embodiment of the present application;

[0071] Figure 7 is a structural schematic diagram of a dispenser assembly provided in an embodiment of the present application;

[0072] Figure 8 This is a schematic diagram of the installation of a wind turbine bearing lubrication system provided in an embodiment of the present application;

[0073] Fig. 9 It is a flow chart of a wind turbine bearing lubrication system control method provided by an embodiment of the present application;

[0074] Fig.10 is a structural schematic diagram of a wind turbine bearing lubrication system control device provided by another embodiment of the present application;

[0075] Fig.11 It is a structural diagram of an electronic device provided by yet another embodiment of the present application. DETAILED DESCRIPTION

[0076] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. 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 the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0078] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the prior art:

[0079] As mentioned above, the main bearings, pitch bearings, yaw bearings and other bearings of wind turbines are usually lubricated with grease. Taking the pitch bearing as an example, the bearing rings of the pitch bearing are usually machined with oil filling holes and oil drain holes to facilitate the injection and discharge of grease. The oil drain hole is usually connected to an oil collecting bottle to collect the discharged waste oil. However, in actual operation, there is almost no waste grease that can be effectively collected by the oil collecting bottle. In most units, there is no grease in the oil collecting bottle, and there is often grease leakage at the seal of the bearing. In units with serious leakage, the grease will flow onto the blades or be thrown into the hub, polluting the hygiene of the unit. In many on-site inspections, it was found that the grease drainage holes of the bearings were blocked for a long time. This situation would make it difficult to discharge the waste oil of the unit. Most of the oil that leaked from the sealing parts was the base oil in the grease. After losing the base oil, the grease additives would become sticky and dry, forming accumulations. Over time, this would have an adverse effect on the lubrication of the bearings. In severe cases, it would lead to insufficient lubrication of the bearings, severe internal wear, and bearing jamming, endangering the safe operation of the unit. It can be seen that poor bearing oil drainage will bring serious harm to the unit.

[0080] There are two main reasons why the bearing has poor oil drainage and leaks from the seal: on the one hand, the viscosity of the grease is high, while the diameters of the bearing's oil drain hole and the oil collecting bottle are small, so that the grease needs a lot of pressure to enter the oil collecting bottle along the oil drain hole. Taking the oil drainage passage with a pipeline length of 100mm and an aperture of 8mm as an example, the data measured through experiments show that the pressure required for a certain brand of grease with a viscosity of 460 to pass through the pipeline can reach 7bar to 10bar. If the grease is contaminated and its fluidity deteriorates, the pressure value will be even greater, but there is no mechanism inside the bearing that can provide enough pressure for the grease to be discharged. On the other hand, the pressure resistance of the bearing seal is not a stable value. When the unit is running, due to the large load of the unit, the radial force and axial force on the bearing are very large. The relative deformation of the inner and outer rings of the bearing will cause the compression force of the bearing seal to be tight on one side and loose on the other side when the unit is running. Grease can easily be squeezed out along the loose position of the seal. In addition, the process of grease running inside the bearing is the separation and recombination process of the base oil and the matrix molecules of the grease. In this process, the precipitation of the base oil is inevitable, and the sealing ability of the seal to the base oil is insufficient. Therefore, grease and base oil are prone to seepage at the seal. In the early stage of the bearing operation, the amount of grease injected into the bearing at the factory is generally about 70% of the internal space, and there is still a cavity space inside the bearing. At this time, regular refueling will not cause a serious impact. However, as the bearing runs for a longer period of time, the bearing continues to be refueled, and the internal space of the bearing will gradually be filled. In addition, the oil collecting bottle pipeline is blocked and the oil cannot be drained, which makes the leakage of grease and base oil along the seal more and more serious. The remaining viscous and hardened grease inside the bearing will gradually increase, and the lubrication environment of the bearing will deteriorate year by year.

[0081] At present, there are some waste grease recovery systems in the industry, and their principle is to suck out the grease by establishing negative pressure at the oil drain hole of the bearing. However, the inventor of this application found that this form cannot solve the problem of the bearing not draining oil. The main reason is that the negative pressure system extracts grease by forming a vacuum or a quasi-vacuum environment at the outlet of the oil drain hole. The maximum pressure value that can be formed in this way is -1 bar. According to the aforementioned experimental values, the actual pressure required for the grease to pass through the oil drain passage can reach 7 bar to 10 bar. It can be seen that the vacuum negative pressure method cannot provide sufficient pressure for the discharge of grease. According to actual industry research, the actual application effect of this negative pressure device on site is also poor, and the waste oil cannot be sucked out by negative pressure.

[0082] Therefore, in order to solve the problem of poor bearing oil drainage, the embodiments of the present application provide a grease drainage device, a wind turbine bearing lubrication system, a control method, a device, a equipment, a medium and a program.

[0083] The following first describes a grease discharge device provided in an embodiment of the present application.

[0084] See also Figure 1 , is a schematic diagram of the structure of a grease discharge device provided in an embodiment of the present application. The grease discharge device provided in an embodiment of the present application can be applied to a bearing with an oil discharge hole. The grease discharge device is arranged at the oil discharge hole of the bearing to discharge the grease in the bearing, such as Figure 1 As shown, the grease discharge device may include: a motor 110 and a mechanical oil extraction device 120. The rotation of the motor 110 can drive the mechanical oil extraction device 120 to extract grease from the oil discharge hole.

[0085] The mechanical oil extraction device 120 mainly includes: an oil drain rod 1201 and an oil collecting mechanism 1202, wherein the oil drain rod 1201 is used to drain the grease in the bearing, and the oil collecting mechanism 1202 is used to collect the grease drained by the oil drain rod 1201 to prevent the grease from flowing to other structures outside the bearing and causing pollution to other structures. For example, when the grease discharge equipment provided in this embodiment is applied to a wind turbine, it can prevent the grease from flowing onto the blades or being thrown into the hub, thereby reducing pollution of the unit.

[0086] The oil drain rod 1201 includes a first end and a second end, wherein the first end is connected to the motor 110, and the second end extends into the oil drain hole. By connecting the first end of the oil drain rod 1201 to the motor 110, the oil drain rod 1201 can rotate with the rotation of the motor 110, and by extending the second end of the oil drain rod 1201 into the oil drain hole, the blockage of the oil drain hole can be effectively avoided. It should be noted that after the second end of the oil drain rod 1201 is extended into the oil drain hole, it cannot contact the rolling element of the bearing. On the one hand, it is to prevent the oil drain rod 1201 from blocking the movement of the rolling element, and on the other hand, it is to prevent the oil drain rod 1201 from causing wear to the rolling element due to the rotation of the oil drain rod 1201.

[0087] The surface of the oil drain rod 1201 is also provided with a guide structure, which is used to guide the grease inside the bearing to flow along the second end of the oil drain rod 1201 toward the first end. In this way, when the oil drain rod 1201 rotates with the motor 110, the guide structure can drain the grease inside the bearing.

[0088] In this embodiment, the material of the oil drain rod 1201 can be selected according to actual conditions, for example, a corrosion-resistant rigid material can be used.

[0089] The embodiment of the present application provides a grease discharge device, including a motor and a mechanical oil extraction device, the mechanical oil extraction device including an oil drain rod and an oil collecting mechanism, the first end of the oil drain rod is connected to the motor, the second end of the oil drain rod extends into the oil drain hole, the surface of the oil drain rod is provided with a flow guide structure, the flow guide structure is used to guide the grease inside the bearing when the oil drain rod rotates with the motor, and the oil collecting mechanism is used to collect the grease guided by the oil drain rod. According to this embodiment, the mechanical oil extraction method is used to drive the mechanical oil extraction device to extract oil from the oil drain hole when the motor rotates. On the one hand, the grease inside the bearing can be guided out, and on the other hand, the blockage of the oil drain hole can be avoided, which effectively improves the problem of poor bearing oil drainage.

[0090] In some embodiments, the guide structure provided on the surface of the oil drain rod 1201 may be a guide groove extending spirally from the first end to the second end of the oil drain rod, that is, a spiral groove is provided on the surface of the oil drain rod 1201 .

[0091] As an example, the oil drain rod 1201 may be Figure 2 The spiral rod shown.

[0092] The spiral grooves arranged on the surface of the oil drain rod 1201 can be used to drain the grease in the bearing along the oil drain rod 1201 .

[0093] Considering that the aperture of the motor 110 may not match the diameter of the oil drain rod 1201, if the motor 110 is directly connected to the oil drain rod 1201, the connection may be unreliable and easy to be disconnected. In some embodiments, Figure 3 As shown, the mechanical oil extraction device also includes: a coupling 1203.

[0094] The coupling 1203 is disposed between the motor 110 and the oil drain rod 1201, and is used to connect the motor 110 and the oil drain rod 1201. Specifically, one end of the oil drain rod 1201 used to be connected to the motor 110 is connected to the motor 110 through the coupling 1203.

[0095] By setting the coupling 1203, the motor 110 and the oil drain rod 1201 can be firmly connected and rotated together. The coupling can also compensate for the deviation (including axial deviation, radial deviation, angular deviation or combined deviation, etc.) caused by deformation or thermal expansion during operation, as well as mitigate impact and absorb vibration.

[0096] In some embodiments, in order to improve the safety of the grease removal device, the coupling 1203 can be an insulating coupling.

[0097] By using an insulating coupling, it is possible to avoid the risk of current from lightning strikes entering the motor through the bearing and the coupling, causing motor overheating or fire.

[0098] In some embodiments, see Figure 4 , the oil collecting mechanism 1202 may include: an oil drain cover 410 and an oil collecting container 420;

[0099] The oil drain cover 410 includes a first tube body 4101 and a second tube body 4102 .

[0100] like Figure 4 As shown, one end of the first tube body 4101 is connected to the motor 110, the other end of the first tube body 4101 is connected to the oil drain hole, and the oil drain rod 1201 and the coupling 1203 are arranged inside the first tube body 4101;

[0101] One end of the second tube body 4102 is communicated with the first tube body 4101 , and the other end of the second tube body 4012 is connected to the inlet of the oil collecting container 420 .

[0102] Through this structure, the oil drain cover 410 can drain the grease guided out from the oil drain hole by the oil drain rod 1201 into the oil collecting container 420, and the oil collecting container 420 collects the grease, thereby preventing the guided grease from flowing into other structures and causing pollution.

[0103] It should be noted that Figure 4 The structure of the oil collecting container 420 is only an example. Figure 4 In addition to the oil collecting bottle shown, it can also be a container with a grease collecting function such as an oil collecting bag, which is not specifically limited in this embodiment.

[0104] In this embodiment, in addition to draining grease into the oil collecting container 420, the oil drain cover 410 also serves as a mounting support structure for the grease draining device, and is used to support the motor 110, the oil drain rod 1201, the coupling 1203 and the oil collecting container 420, to ensure their reliable connection with the oil drain hole. In order to ensure the firmness of the connection between the various components, the end of the oil drain cover 410 connected to the motor 110 can be connected to the motor 110 through a flange, thereby fixing the connection between the motor 110 and the oil drain cover 410, wherein the end connected to the oil drain hole can be connected to the oil drain hole through a thread, thereby fixing the connection between the motor oil drain cover 110 and the oil drain hole, and further fixing the connection between the motor 110 and the oil drain hole.

[0105] In this embodiment, the material of the oil drain cover 410 can be selected according to actual conditions, for example, a corrosion-resistant rigid material can be used.

[0106] The grease discharge device provided in the embodiment of the present application can be applied to a wind turbine to discharge oil from the bearings of the wind turbine. Based on this, the embodiment of the present application also provides a wind turbine bearing lubrication system including the grease discharge device provided in the embodiment of the present application, which can be used to lubricate the main bearings, pitch bearings or yaw bearings of the wind turbine.

[0107] See also Figure 5 , is a structural schematic diagram of a wind turbine bearing lubrication system provided in an embodiment of the present application, such as Figure 5 As shown, the system may include: a sensing device 510 , a control device 520 , a grease filling device 530 and a grease discharge device 540 .

[0108] The specific structure of the grease discharge device 540 can refer to the relevant description in the above embodiments, and will not be described again here to avoid repetition.

[0109] The wind turbine bearing lubrication system provided in the embodiment of the present application is used to lubricate the bearings in the wind turbine, wherein the bearings include an oil filling hole and an oil drain hole.

[0110] The grease discharge device 540 is arranged at the oil drain hole of the bearing. One grease discharge device 540 is used to be connected to one oil drain hole. If there are multiple oil drain holes on the bearing, one grease discharge device 540 is installed on each grease drain hole. The total number of installations is specified according to the number of oil drain holes of the bearing or customer requirements.

[0111] The grease filling device 530 is connected to the oil filling hole of the bearing and is used to inject grease into the oil filling hole;

[0112] The sensing device 510 is used to obtain the operating status information of the bearing;

[0113] The control device 520 is connected to the sensing device 510, the grease filling device 530 and the grease discharge device 540 respectively, and is used to control the operation of the grease filling device 530 and / or the grease discharge device 540 according to the operating status information of the bearing.

[0114] The control device 520 includes an information collection module and a system control module. The information collection module uses the operating status information provided by the sensing device 510 to determine the operating status of the bearing, for example, to determine whether the inner ring and outer ring of the bearing rotate relative to each other through the input of the digital signal of the proximity switch; or to determine whether the operating temperature of the bearing is normal through the PT100 temperature sensor. The system control module outputs a control signal according to the information collected by the information collection module, and controls the action of the grease filling device 530 and / or the grease discharge device 540 according to the current working mode.

[0115] The sensing device 510 may include a sensor, which provides the information acquisition module with the operating status information of the bearing. The information is used as the input of the entire system and has good adaptability. The input signal of the sensing device 510 depends on the type of sensor, or the state that needs to be considered in the operation of the bearing. For example, the main bearing may consider the temperature signal, vibration acceleration signal, speed signal, etc.; the variable pitch bearing may consider the bearing operating angle signal, and the yaw bearing may consider the yaw angle signal, etc.

[0116] The wind turbine bearing lubrication system provided in the embodiment of the present application can effectively solve the problem that the grease inside the bearing cannot be discharged through the linkage of the sensing device, the control device, the grease filling device and the grease discharge device. It can also realize automatic grease filling with the grease filling device while discharging the grease, thereby realizing the renewal of the grease inside the bearing.

[0117] In some embodiments, see Figure 6 , the grease filling device 530 may include:

[0118] Grease pump 610 , dispenser assembly 620 and pipeline 630 .

[0119] The inlet of the distributor assembly 620 is connected to the outlet of the grease pump 610 , and the outlet of the distributor assembly 620 is connected to the oil injection hole through the pipeline 630 , so as to inject the grease output by the grease pump 610 into the oil injection hole.

[0120] In addition, the control device 520 is connected to the grease pump 610 for controlling the grease pump 610 .

[0121] Among them, Figure 6 As shown, the grease pump 610 can be an electric grease pump, which mainly includes an oil tank, a motor, a pump body, a pump core, a one-way valve and an overflow valve. The oil tank is used to store grease, and the motor is the power source of the pump. It transmits power to the pump core through transmission transposition to make it rotate, thereby extracting grease from the oil tank and outputting the grease through the one-way valve. The one-way valve is mainly used to prevent grease from flowing back into the pump body, and the overflow valve is mainly used to prevent the oil tank from overflowing. The inlet of the overflow valve is connected to the overflow hole on the oil tank through a pipeline, and the outlet of the overflow valve is connected to the outlet of the grease pump 610 through a pipeline.

[0122] The grease pump 610 uses the power cord and signal line as input, and the control device 520 controls the action of the grease pump 610 through the input. The distributor assembly 620 is responsible for evenly distributing the grease delivered by the grease pump 610 to the pipeline 630. The end of the pipeline 630 is connected to the oil filling hole of the bearing to realize the grease replenishment of the bearing.

[0123] Through the above structure, oil filling to the oil filling hole can be achieved.

[0124] In some embodiments, the distributor assembly 620 may be a single-line distributor and / or a progressive distributor.

[0125] In addition, considering that a bearing may include multiple oil injection holes, the distributor assembly 620 may include multiple distributors, each outlet of the distributor includes a one-way valve, wherein the distributor is also called an oil feeder or an oil distributor.

[0126] As an example, Figure 7 As shown, the distributor assembly 620 includes a first-stage distributor and a second-stage distributor, wherein the first-stage distributor includes a distributor, the inlet of which is connected to the outlet of the grease pump 610, and the second-stage distributor includes three distributors, the inlets of the three distributors are respectively connected to the outlet of the first-stage distributor, and the outlets of the three distributors are connected to the oil filling hole through the pipeline 630.

[0127] It should be noted that Figure 7 The number of distributors is only an example, and the total number of distributors in the distributor assembly 620 is specified according to the number of bearing oil injection holes or customer requirements.

[0128] The distributor assembly 620 allows multiple oil filling holes to be filled with oil through a grease filling device.

[0129] For wind turbines with a long service life, after installing the wind turbine bearing lubrication system provided by this embodiment of the present application, the circulation and renewal of grease inside the bearing can be achieved by appropriately increasing the working frequency, and the lubrication of the bearing can be improved in a short period of time; for wind turbines with a short service life and good lubrication conditions, after installing the wind turbine bearing lubrication system provided by this embodiment of the present application, the working frequency can be set according to normal operation and maintenance to achieve long-term worry-free lubrication of the unit.

[0130] Based on the above content, the working modes of the wind turbine bearing lubrication system provided in the embodiment of the present application may include a first mode and a second mode, wherein the first mode is mainly used for grease renewal, and the second mode is mainly used for daily operation and maintenance. In actual applications, users can select the corresponding mode according to actual conditions.

[0131] In some embodiments, when the working mode of the wind turbine bearing lubrication system is the first mode, the control device 520 controls the grease filling device 530 and / or the grease discharge device 540 to operate according to the operating status information of the bearing, which may include:

[0132] The control device 520 controls the motor in the grease discharge device 540 to start rotating at a first speed in response to determining that the bearing starts rotating according to the operating state information of the bearing;

[0133] In response to the motor continuously rotating for a first preset time, the control device 520 controls the grease filling device 530 to start working;

[0134] The control device 520 controls the grease filling device 530 to stop working in response to determining that the bearing stops rotating according to the operating state information of the bearing;

[0135] In response to the bearing stopping rotating for a duration reaching a second preset time, the control device 520 controls the motor of the grease discharge device 540 to stop rotating.

[0136] The first rotation speed can be set according to actual conditions, and the first preset time length and the second preset time length can be set according to the grease discharge speed and the grease filling speed.

[0137] In addition, considering that the capacity of the oil tank in the grease pump 610 is limited, in order to timely understand the remaining grease in the oil tank, the sensing device 510 may include a liquid level sensor, which is used to detect the oil level information in the oil tank.

[0138] Correspondingly, the control device 540 can also control the grease filling device 530 and / or the grease discharge device 540 according to the oil level information detected by the liquid level sensor.

[0139] As an example, in the first mode, the control device 520 can control the grease filling device 530 to stop working when it is determined that the oil level in the oil tank is lower than a preset oil level threshold according to the oil level information detected by the liquid level sensor, so as to avoid damage to the grease filling device 530. The oil level threshold can be set according to actual conditions.

[0140] Furthermore, when the control device 520 determines that the oil level in the oil tank is lower than the preset oil level threshold, it can also issue a warning to prompt the personnel to go up the tower in time to add grease to the oil tank, and at the same time, it can also prompt the personnel to clean the waste grease in the oil collecting mechanism 1202 in the grease discharge device 540. By regularly adding grease to the oil tank and cleaning the oil collecting mechanism 1202, the grease renewal and grease circulation of the unit can be achieved, the grease lubrication cleanliness of the bearing can be improved, and the bearing life can be greatly improved.

[0141] It can be seen that in the first mode, when the operation of the bearing is sensed, the grease discharge device 540 is started when the bearing rotates, and during the grease discharge, the grease filling device 530 is used to automatically add grease, so that the grease inside the bearing can be completely renewed without affecting the operation of the bearing. The reason why the oil discharge is stopped after a period of time after the oil filling is stopped is that the speed of oil discharge is usually slower than that of oil filling. In this way, the amount of grease inside the bearing can be maintained at a better state.

[0142] In some embodiments, when the working mode of the wind turbine bearing lubrication system is the second mode, the control device 520 controls the grease filling device 530 and / or the grease discharge device 540 to operate according to the operating status information of the bearing, which may include:

[0143] The control device 520 determines the oil filling cycle and the target oil filling amount;

[0144] The control device 520 controls the grease filling device 530 to start filling oil into the oil filling hole at the oil filling start time, wherein the oil filling start time is determined based on the oil filling cycle;

[0145] In response to the oil injection amount of the grease injection device 530 reaching the target oil injection amount, the control device 520 controls the grease injection device 530 to stop injecting oil into the oil injection hole;

[0146] The control device 520 controls the motor of the grease discharge device 540 to start rotating at the oil discharge start time, wherein the oil discharge start time is a time before the oil injection start time and a third preset time away from the oil injection start time;

[0147] In response to the duration of the grease filling device 530 stopping the injection of oil into the oil injection hole reaching a fourth preset time length, the control device 520 controls the motor of the grease discharge device 540 to stop rotating.

[0148] Among them, the oil filling cycle and the target oil filling amount can be set according to actual conditions, and the third preset time length and the fourth preset time length can be set according to the grease discharge speed and the grease filling speed.

[0149] Through the above method, in the second mode, the daily renewal of the grease in the bearing can be achieved, the unit lubrication oil injection and oil discharge form a complete cycle, and the bearing is kept well lubricated. Draining the oil before starting the oil injection can ensure that there is enough space in the bearing for new grease injection, and compared with starting the oil injection and oil discharge at the same time, this method can quickly improve the cleanliness of the grease in the bearing. In addition, considering that the oil injection speed is usually faster than the oil discharge speed, after stopping the oil injection, delaying for a period of time before stopping the oil discharge can ensure that the amount of grease inside the bearing is maintained in a better state.

[0150] In addition, in some embodiments, the bearing grease can be renewed again according to the first mode every 1-2 years. Through periodic work, the bearing lubrication maintenance can be completed well, ensuring that the grease inside the bearing is kept clean and sufficient for a long time.

[0151] The following uses the application of the wind turbine bearing lubrication system provided in the embodiment of the present application to the variable pitch bearing of the wind turbine as an example to illustrate its working principle.

[0152] In view of the long operation time of the variable pitch bearings of wind turbines, the lack of lubrication equipment, and the long-term manual refueling without timely refueling, which causes the grease fluidity inside the bearings to deteriorate, the bearing seals to leak oil seriously, the grease color to turn black, and the lubrication state to be very poor, the wind turbine bearing lubrication system provided in the embodiment of the present application can update the lubrication state of the variable pitch bearings.

[0153] When the wind turbine bearing lubrication system provided by the embodiment of the present application is used to update the lubrication state of the variable pitch bearing, it needs to be installed first. During installation, a reliable position can be selected in the hub for fixed installation, and pipelines and circuits can be arranged, fully considering reliability and safety.

[0154] See also Figure 8 , which is a schematic diagram of the installation of the wind turbine bearing lubrication system provided in the embodiment of the present application on a variable pitch bearing including 8 oil drain holes, wherein a grease discharge device 540 is installed at each oil drain hole, so 8 grease discharge devices 540 are installed, and since the grease filling device 530 can fill oil to multiple oil filling holes at the same time through a distributor, only one grease filling device 530 needs to be installed. The power box is mainly used to power the grease pump in the grease filling device 530 and the motor in the grease discharge device 540. This figure only shows the application of each device on the variable pitch bearing. The specific on-site application and installation need to be combined with the actual on-site conditions. If the on-site conditions are sufficient, this system solution is also applicable to yaw bearings and main bearings.

[0155] After installation is complete, the lubrication status of the pitch bearing can be updated based on the wind turbine bearing lubrication system.

[0156] When the lubrication status of the variable pitch bearing is updated, if the variable pitch bearing needs to be updated with grease, the wind turbine bearing lubrication system can be set to the first mode. When the wind turbine bearing lubrication system is in the first mode, the control device 520 can use the grease update control logic to control the operation of the grease filling device 530 and / or the grease discharge device 540 to update the grease of the variable pitch bearing, wherein the grease update control logic can be set as follows: when it is determined that the bearing starts to rotate according to the operating status information input by the sensing device, the grease discharge device 540 is controlled to work, that is, the motor of the grease discharge device 540 is controlled to rotate, and the operating speed of the motor is 160r / min. After 5s, the grease injection device 530 is controlled to start working, and the working time is a continuous working mode; when it is determined that the bearing stops working according to the operating status information input by the sensing device, the grease filling device 530 is controlled to stop working, and the grease discharge device 540 is controlled to stop working after a delay of 5s.

[0157] In actual application, in the first mode, when the oil tank 610 is filled with grease at an early stage, generally, personnel only need to add grease twice, and the grease inside the bearing can be updated once.

[0158] When it is necessary to perform daily operation and maintenance on the variable pitch bearing, the wind turbine bearing lubrication system can be set to the second mode. Usually, after the grease is updated in the first mode, it can be automatically set to the second mode. When the wind turbine bearing lubrication system is in the second mode, the control device 520 can use daily control logic to control the operation of the grease filling device 530 and / or the grease discharge device 540 to perform daily maintenance on the variable pitch bearing. The daily control logic can be set as follows: adjust the oiling cycle and target oiling amount according to the maintenance manual of the wind turbine, and perform periodic oiling. For example, one oiling cycle is every 24 hours, and the target oiling amount is the oiling amount of the grease filling device 530 working for 10 minutes. Before controlling the grease filling device 530 to work, start the grease discharge device 540 5 seconds in advance. After the grease filling device 530 stops working, stop the grease discharge device 540 after a delay of 5 seconds.

[0159] The present application also provides a control method for a wind turbine bearing lubrication system, which can be applied to a control device of a wind turbine bearing lubrication system. The control device controls a grease injection device and a grease discharge device based on the control method, thereby updating the bearing lubrication status.

[0160] See also Fig. 9 , is a flow chart of a wind turbine bearing lubrication system control method provided in an embodiment of the present application, such as Fig. 9 As shown, the control method may include the following steps:

[0161] S910. Obtaining the operating status information of the bearing;

[0162] S920. Control the operation of the grease filling device and / or the grease discharge device according to the operation status information.

[0163] When the control method provided in this embodiment is applied to the control device of the wind turbine bearing lubrication system, the control device can obtain the operating status information of the bearing from the sensing device of the wind turbine bearing lubrication system. The operating status information obtained in the wind turbine bearing lubrication system corresponding to different bearings may be different. For example, for the main bearing, the operating status information obtained may include temperature, vibration acceleration, rotation speed, etc.; for the variable pitch bearing, the operating status information obtained may include the bearing operating angle, etc.; for the yaw bearing, the operating status information obtained may include the yaw angle signal, etc.

[0164] After the operating status information is acquired, the operating condition of the bearing can be determined according to the operating status information, and then the operation of the grease filling device and / or the grease discharge device can be controlled according to the operating condition of the bearing, thereby updating the lubrication status of the bearing.

[0165] Since different bearings have operating status information, the method of determining the operating condition of the bearing based on the operating status information is usually different. The method of determining the operating condition of the bearing based on the operating status information can be set according to the characteristics of the bearing, and the embodiment of the present application does not make any specific limitations on this.

[0166] The wind turbine bearing lubrication system control method provided in the embodiment of the present application obtains the operating status information of the bearing through the linkage of the sensing device, the control device, the grease filling device and the grease discharge device, and controls the operation of the grease filling device and / or the grease discharge device according to the operating status information, which can effectively solve the problem that the grease inside the bearing cannot be discharged. According to this embodiment, when sensing the operation of the bearing, the grease can be discharged while the grease filling device is used for automatic greasing, thereby realizing the renewal of the grease inside the bearing, effectively maintaining the good lubrication state of the bearing, and extending the service life of the bearing.

[0167] In some embodiments, the wind turbine bearing lubrication system may include a first mode and a second mode, wherein the first mode indicates that the bearing is to be greased and updated, and the second mode indicates that the bearing is to be maintained on a daily basis. Based on this, controlling the operation of the grease filling device and / or the grease discharge device according to the operation status information may include:

[0168] When the working mode of the wind turbine bearing lubrication system is the first mode, in response to determining that the bearing starts to rotate according to the operating state information of the bearing, controlling the motor in the grease discharge device to start rotating at a first speed;

[0169] In response to the duration of the motor rotation reaching a first preset duration, controlling the grease filling device to start working;

[0170] In response to determining that the bearing stops rotating according to the operating state information of the bearing, controlling the grease filling device to stop working;

[0171] In response to the bearing stopping rotating for a duration reaching a second preset time, the motor is controlled to stop rotating.

[0172] The first rotation speed can be set according to actual conditions, and the first preset time length and the second preset time length can be set according to the grease discharge speed and the grease filling speed.

[0173] In the above manner, in the first mode, when the operation of the bearing is sensed, the grease discharge device 540 is started when the bearing rotates, and during the grease discharge, the grease filling device 530 is used to automatically add grease, so that the grease inside the bearing can be completely renewed without affecting the operation of the bearing. The reason why the oil discharge is stopped after a period of time after the oil filling is stopped is that the speed of oil discharge is usually slower than that of oil filling. In this way, the amount of grease inside the bearing can be maintained at a better state.

[0174] Furthermore, controlling the operation of the grease filling device and / or the grease discharging device according to the operation status information may also include:

[0175] When the working mode of the wind turbine bearing lubrication system is the second mode, determining the oil filling cycle and target oil filling amount of the bearing;

[0176] Determine the oil filling start time and the oil draining start time according to the oil filling cycle, the oil draining start time being the time before the oil filling start time and the time of the third preset time length from the oil filling start time;

[0177] At the start of oil discharge, the motor controlling the grease discharge device starts to rotate;

[0178] At the start of oil filling, the grease filling device is controlled to start filling oil into the oil filling hole;

[0179] In response to the oil filling amount of the grease filling device reaching the target oil filling amount, controlling the grease filling device to stop filling oil into the oil filling hole;

[0180] In response to the duration of the grease filling device stopping filling oil into the oil filling hole reaching a fourth preset time length, the motor is controlled to stop rotating.

[0181] Among them, the oil filling cycle and the target oil filling amount can be set according to actual conditions, and the third preset time length and the fourth preset time length can be set according to the grease discharge speed and the grease filling speed.

[0182] Through the above method, in the second mode, the daily renewal of the grease in the bearing can be achieved, the unit lubrication oil injection and oil discharge form a complete cycle, and the bearing is kept well lubricated. Draining the oil before starting the oil injection can ensure that there is enough space in the bearing for new grease injection, and compared with starting the oil injection and oil discharge at the same time, this method can quickly improve the cleanliness of the grease in the bearing. In addition, considering that the oil injection speed is usually faster than the oil discharge speed, after stopping the oil injection, delaying for a period of time before stopping the oil discharge can ensure that the amount of grease inside the bearing is maintained in a better state.

[0183] Based on the wind turbine bearing lubrication system control method provided in the above embodiment, the present application also provides a specific implementation of the wind turbine bearing lubrication system control device. Please refer to the following embodiment.

[0184] See also Fig.10 The wind turbine bearing lubrication system control device provided in the embodiment of the present application includes the following modules:

[0185] An acquisition module 1001 is used to acquire the operating status information of the bearing;

[0186] The control module 1002 is used to control the operation of the grease filling device and / or the grease discharge device according to the operation status information.

[0187] The wind turbine bearing lubrication system control device provided in the embodiment of the present application obtains the operating status information of the bearing and controls the operation of the grease filling device and / or the grease discharge device according to the operating status information. According to this embodiment, the grease inside the bearing can be updated by controlling the operation of the grease filling device and / or the grease discharge device when the operation of the bearing is sensed, thereby effectively maintaining the good lubrication state of the bearing and extending the service life of the bearing.

[0188] In some embodiments, the control module 1002 can be used to:

[0189] When the working mode of the wind turbine bearing lubrication system is the first mode, in response to determining that the bearing starts to rotate according to the operating state information of the bearing, controlling the motor in the grease discharge device to start rotating at a first speed;

[0190] In response to the duration of the motor rotation reaching a first preset duration, controlling the grease filling device to start working;

[0191] In response to determining that the bearing stops rotating according to the operating state information of the bearing, controlling the grease filling device to stop working;

[0192] In response to the bearing stopping rotating for a duration reaching a second preset time, the motor is controlled to stop rotating.

[0193] In some embodiments, the control module 1002 may also be used to:

[0194] When the working mode of the wind turbine bearing lubrication system is the second mode, determining the oil filling cycle and target oil filling amount of the bearing;

[0195] Determine the oil filling start time and the oil draining start time according to the oil filling cycle, the oil draining start time being the time before the oil filling start time and the time of the third preset time length from the oil filling start time;

[0196] At the start of oil discharge, the motor controlling the grease discharge device starts to rotate;

[0197] At the start of oil filling, the grease filling device is controlled to start filling oil into the oil filling hole;

[0198] In response to the oil filling amount of the grease filling device reaching the target oil filling amount, controlling the grease filling device to stop filling oil into the oil filling hole;

[0199] In response to the duration of the grease filling device stopping filling oil into the oil filling hole reaching a fourth preset time length, the motor is controlled to stop rotating.

[0200] The wind turbine bearing lubrication system control device provided in the embodiment of the present application can implement each process implemented in the wind turbine bearing lubrication system control method embodiment, and will not be described again here to avoid repetition.

[0201] Fig.11 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0202] The electronic device may include a processor 1101 and a memory 1102 storing computer program instructions.

[0203] Specifically, the processor 1101 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0204] The memory 1102 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 1102 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 1102 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 1102 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 1102 is a non-volatile solid-state memory. The memory 1102 may include a read-only memory (ROM), a random access memory (RAM), a disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Therefore, typically, the memory 1102 includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it can perform the operations described in any one of the wind turbine bearing lubrication system control methods in the above-mentioned embodiments.

[0205] The processor 1101 reads and executes the computer program instructions stored in the memory 1102 to implement any one of the wind turbine bearing lubrication system control methods in the above embodiments.

[0206] In one example, the electronic device may further include a communication interface 1103 and a bus 1110. Fig.11 As shown, the processor 1101, the memory 1102, and the communication interface 1103 are connected via a bus 1110 and communicate with each other.

[0207] The communication interface 1103 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0208] Bus 1110 includes hardware, software or both, and the parts of online data flow billing equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 1110 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0209] In addition, in combination with the wind turbine bearing lubrication system control method in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the wind turbine bearing lubrication system control methods in the above embodiment is implemented.

[0210] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0211] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0212] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0213] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0214] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A grease discharge device, characterized in that: Applicable to a bearing with an oil drain hole, the grease discharge device is arranged at the oil drain hole of the bearing, and the grease discharge device includes: a motor and a mechanical oil extraction device; The mechanical oil extraction device comprises an oil drain rod and an oil collecting mechanism; The first end of the oil drain rod is connected to the motor, and the second end of the oil drain rod extends into the oil drain hole; The surface of the oil drain rod is provided with a guide structure, and the guide structure is used to guide the grease inside the bearing out when the oil drain rod rotates with the motor; The oil collecting mechanism is used to collect the grease discharged from the oil drain rod.

2. The grease removal device according to claim 1, characterized in that: The flow guiding structure comprises: A guide groove extends spirally from the first end to the second end of the oil drain rod.

3. The grease removal device according to claim 1 or 2, characterized in that: The mechanical oil extraction device further comprises: a coupling; The coupling is disposed between the motor and the first end of the oil drain rod, and is used to connect the motor and the first end of the oil drain rod.

4. The grease removal device according to claim 3, characterized in that: The coupling comprises an insulating coupling.

5. The grease removal device according to claim 3, characterized in that: The oil collecting mechanism comprises: an oil drain cover and an oil collecting container; The oil drain cover includes a first pipe body and a second pipe body; One end of the first tube body is connected to the motor, the other end of the first tube body is connected to the oil drain hole, and the oil drain rod and the coupling are arranged inside the first tube body; One end of the second tube body is communicated with the first tube body, and the other end of the second tube body is connected to the inlet of the oil collecting container.

6. A wind turbine bearing lubrication system, characterized in that: include: A sensing device, a control device, a grease filling device and a grease discharge device according to any one of claims 1 to 5; The grease filling device is connected to the oil filling hole of the bearing and is used to inject grease into the oil filling hole; The sensing device is used to obtain the operating status information of the bearing; The control device is connected to the sensing device, the grease filling device and the grease discharge device respectively, and is used to control the operation of the grease filling device and / or the grease discharge device according to the operation status information.

7. The system according to claim 6, characterized in that The grease filling equipment comprises: Grease pumps, dispenser assemblies and lines; The inlet of the distributor assembly is connected to the outlet of the grease pump, and the outlet of the distributor assembly is connected to the oil filling hole through the pipeline, so as to inject the grease output by the grease pump into the oil filling hole; The control device is connected to the grease pump and is used to control the grease pump.

8. The system according to claim 7, characterized in that The distributor assembly includes a single-line distributor and / or a progressive distributor.

9. The system according to claim 6, characterized in that When the working mode of the wind turbine bearing lubrication system is the first mode, the control device controls the grease filling device and / or the grease discharge device to operate according to the operating state information of the bearing, including: The control device controls the motor in the grease discharge device to start rotating at a first speed in response to determining that the bearing starts rotating according to the operating state information of the bearing; The control device controls the grease filling device to start working in response to the continuous rotation time of the motor reaching a first preset time length; The control device controls the grease filling device to stop working in response to determining that the bearing stops rotating according to the operating state information of the bearing; In response to the bearing stopping rotating for a duration reaching a second preset time, the control device controls the motor to stop rotating.

10. The system according to claim 6, characterized in that When the working mode of the wind turbine bearing lubrication system is the second mode, the control device controls the operation of the grease filling device and / or the grease discharge device according to the operating state information of the bearing, including: The control device determines the oil injection cycle and the target oil injection amount; The control device controls the grease filling device to start filling oil into the oil filling hole at the oil filling start time, wherein the oil filling start time is determined based on the oil filling cycle; The control device controls the grease filling device to stop filling oil into the oil filling hole in response to the oil filling amount of the grease filling device reaching the target oil filling amount; The control device controls the motor of the grease discharge device to start rotating at the oil discharge start time, wherein the oil discharge start time is a time before the oil injection start time and a third preset time away from the oil injection start time; In response to the duration of the grease filling device stopping filling oil into the oil filling hole reaching a fourth preset time length, the control device controls the motor to stop rotating.

11. A method for controlling a bearing lubrication system of a wind turbine generator set, characterized in that: Applied to the control device according to any one of claims 6 to 10, the method comprises: Obtain the operating status information of the bearing; The operation of the grease filling device and / or the grease discharge device is controlled according to the operation status information.

12. The control method according to claim 11, characterized in that: The step of controlling the operation of the grease filling device and / or the grease discharge device according to the operation status information includes: When the working mode of the wind turbine bearing lubrication system is the first mode, in response to determining that the bearing starts to rotate according to the operating state information of the bearing, controlling the motor in the grease discharge device to start rotating at a first speed; In response to the duration of the rotation of the motor reaching a first preset duration, controlling the grease filling device to start working; In response to determining that the bearing stops rotating according to the operating state information of the bearing, controlling the grease filling device to stop working; In response to the bearing stopping rotating for a duration reaching a second preset time, the motor is controlled to stop rotating.

13. The method according to claim 11, characterized in that The step of controlling the operation of the grease filling device and / or the grease discharge device according to the operation status information includes: When the working mode of the wind turbine bearing lubrication system is the second mode, determining the oil filling cycle and target oil filling amount of the bearing; Determine the oil injection start time and the oil discharge start time according to the oil injection cycle, the oil discharge start time being a time before the oil injection start time and a third preset time away from the oil injection start time; At the start of oil discharge, the motor controlling the grease discharge device starts to rotate; At the oil filling start time, controlling the grease filling device to start filling oil into the oil filling hole; In response to the oil filling amount of the grease filling device reaching the target oil filling amount, controlling the grease filling device to stop filling oil into the oil filling hole; In response to the duration of the grease filling device stopping filling oil into the oil filling hole reaching a fourth preset time length, the motor is controlled to stop rotating.

14. A wind turbine bearing lubrication system control device, characterized in that: Applied to the control device according to any one of claims 6 to 10, the device comprising: An acquisition module, used to acquire the operating status information of the bearing; The control module is used to control the operation of the grease filling device and / or the grease discharge device according to the operation status information.

15. An electronic device, characterized in that: The device comprises: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the control method of the wind turbine bearing lubrication system according to any one of claims 11 to 13 is implemented.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the control method for the wind turbine bearing lubrication system according to any one of claims 11 to 13 is implemented.

17. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the control method for a wind turbine bearing lubrication system according to any one of claims 11 to 13.

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