Partitioned lubrication method for yaw gear of wind generating set

Abstract

The invention relates to the technical field of wind generating set yaw system lubrication, in particular to a wind generating set yaw gear partition lubrication method which comprises the steps that area division is conducted, specifically, the working face of a yaw gear is evenly divided into an upper independent lubrication area, a middle independent lubrication area and a lower independent lubrication area in the axial direction; performing exposure detection; grading judgment: judging whether an oil outlet hole of the grease injection pinion needs to be blocked or not for the exposed area based on the exposed area proportion and a preset judgment threshold value, and determining the area needing to be blocked; for the non-exposed area, the lubricating grease covering thickness is detected through thickness detection equipment, the film thickness proportion is calculated, and the area needing to be plugged and the number needing to be plugged are determined according to the film thickness difference proportion; and executing the operation. According to the invention, through dynamic plugging of the oil outlet holes, precise regulation and control of the lubrication amount in the tooth width direction are realized, so that the lubrication uniformity is improved, and waste and pollution caused by accumulation of grease on the lower side are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of lubrication of yaw systems of wind turbine generator sets, and in particular to a partitioned lubrication method for yaw gears of wind turbine generator sets. Background Art

[0002] During operation, wind turbines need to lubricate key components to ensure their service life.

[0003] Lubrication of the open tooth surfaces of the yaw bearing, which contact the yaw gearbox output shaft, is a key aspect of wind turbine yaw bearing lubrication. Due to its open structure, grease can only adhere to the yaw bearing.

[0004] Currently, the yaw bearing tooth surface is mainly quantitatively lubricated through automatic lubrication devices such as the aforementioned grease injection pinion. Since the open tooth surface of the yaw bearing in contact with the yaw reduction gear output shaft is unevenly subjected to stress wear, and the grease injection pinion lubricates the yaw bearing tooth surface in a non-targeted manner, but rather lubricates the working area uniformly, some areas on the yaw bearing tooth surface may not be lubricated or lubricated insufficiently, resulting in a shortened yaw system lifespan, while other areas may accumulate excessive grease, contaminating other equipment and causing waste. Especially under the influence of gravity, grease in the upper area is very likely to flow down the tooth surface, resulting in oil shortage on the upper side of the gear ring and grease accumulation on the lower side, which in turn leads to uneven lubrication of the yaw gear surface, aggravating its own wear while contaminating other equipment and causing waste. Summary of the Invention

[0005] The present application provides a partitioned lubrication method for the yaw gear of a wind turbine generator set, which is used to solve the problem in the prior art that lubricating grease easily flows down the tooth surface, resulting in oil shortage on the upper side of the gear ring and grease accumulation on the lower side, resulting in uneven lubrication of the yaw gear surface.

[0006] The present application provides a partitioned lubrication method for a yaw gear of a wind turbine generator set, comprising:

[0007] Step S1: area division, dividing the yaw gear working surface into three independent lubrication areas: upper, middle, and lower along the axial direction;

[0008] Step S2, exposure detection, uses image detection equipment to scan the grease coverage status of each lubrication area to determine whether there is exposure and obtain exposure area data;

[0009] Step S3: graded determination: for exposed areas, whether the oil outlet holes of the grease injection pinion need to be blocked is determined based on the exposed area ratio and a preset determination threshold, and the required blocking area is determined;

[0010] For areas without exposed areas, the thickness of the lubricating grease is tested by thickness testing equipment, and the film thickness ratio is calculated. The required plugging area and the required number of pluggings are determined based on the film thickness difference ratio.

[0011] Step S4, executing an operation, dynamically sealing the oil outlet hole of the grease injection pinion or injecting lubricating grease into the interior thereof according to the determination result of step S3.

[0012] Preferably, in step S2, the exposed area of ​​each region collected is recorded, and the exposed area ratio of each region is calculated based on the exposed area of ​​each region and the overall area of ​​each region;

[0013] Where K = An / A (n = 1, 2, 3), K is the exposed area ratio of each region, A1 is the exposed area of ​​the upper region, A2 is the exposed area of ​​the middle region, A3 is the exposed area of ​​the lower region, and A is the overall area of ​​each region.

[0014] Preferably, in step S3, the process of determining the exposed area ratio of each region according to the preset determination threshold is as follows:

[0015] If the exposed area ratio of the current area is less than the preset determination threshold, the current area is determined to be a normal coverage area;

[0016] If the exposed area ratio of the current region is greater than or equal to the preset determination threshold, the current region is determined to be an exposed region and marked.

[0017] Preferably, in step S3, each area marked as an exposed area is identified and recorded, and the process of determining whether the oil outlet hole of the grease injection pinion needs to be blocked is as follows:

[0018] If the upper, middle and lower areas are all marked as exposed areas, it is determined that the lubricating grease stored in the grease injection pinion is insufficient, and the grease injection refilling procedure is executed;

[0019] If only the upper and middle areas are marked as exposed areas, it is determined that the current grease-injected pinion has uneven lubrication, and the lubrication area corresponding to the normal coverage area is determined to be the required blocking area.

[0020] Preferably, in step S3, the process of determining whether the oil outlet hole of the grease injection pinion needs to be blocked further includes:

[0021] If the upper, middle and lower areas are all normal coverage areas, there is no need to block the oil outlet hole of the grease injection pinion.

[0022] Preferably, in step S3, when the image detection device detects that there is no exposure in the upper, middle and lower three independent lubrication areas, the thickness detection device will detect and collect the thickness of the lubricating grease covering the surface of each area.

[0023] Preferably, the coverage thickness of the lubricating grease in each region is arranged and compared to obtain the film thickness ratio between each region;

[0024] Among them, K1=H1:H2, K2=H2:H3, K1 is the film thickness ratio between the upper layer and the middle layer, K2 is the film thickness ratio between the middle layer and the lower layer, H1 is the coverage thickness of the lubricating grease in the upper layer area, H2 is the coverage thickness of the lubricating grease in the middle layer area, and H3 is the lubricating grease in the lower layer area.

[0025] Preferably, in step S3, a preset film thickness ratio is further provided, and the obtained film thickness ratios between the regions are determined according to the preset film thickness ratios:

[0026] If the film thickness ratio between the obtained areas is greater than or equal to the preset film thickness ratio, it is determined that it is a normal coverage area and there is no need to block the oil outlet hole of the grease injection pinion;

[0027] If the film thickness ratio between the obtained areas is less than the preset film thickness ratio, it is determined that the current grease-injected pinion has uneven lubrication, and the lower lubrication area in the current comparison area is determined to be the required sealing area. The preset film thickness ratio and the current film thickness ratio are calculated to obtain the required number of seals for each oil outlet in the required sealing area.

[0028] Preferably, in step S3, a preset film thickness threshold is further provided. When it is determined that both the middle and lower areas are required blocking areas, the thickness of the lubricating grease in the upper lubrication area is obtained and compared with the thickness of the lubricating grease in the lower lubrication area to obtain a determined film thickness value, and the determined film thickness value is determined according to the preset film thickness threshold:

[0029] If the determined film thickness value is greater than or equal to the preset film thickness threshold, the oil outlet holes at the required blocking area corresponding to the lower lubrication area will be completely blocked.

[0030] Preferably, in step S4, the oil outlet hole of the grease injection pinion is evenly divided into three sealing areas, upper, middle and lower, corresponding to the lubrication area of ​​the yaw gear along the axial direction, and the oil outlet holes in the corresponding areas are sealed according to the determined required sealing areas and the required number of sealings.

[0031] The beneficial effects of this application are as follows:

[0032] The wind turbine yaw gear zone lubrication method of the present application divides the yaw gear into three lubrication areas, namely, upper, middle and lower, along the axial direction, and monitors the condition of the lubricating grease covering the surfaces of the corresponding three lubrication areas in a zoned manner, so as to timely determine whether uneven lubrication occurs, and determine the required blocking area when uneven lubrication occurs, thereby realizing dynamic blocking of the oil outlet holes at the corresponding positions of the grease-injected pinion, and through the dynamic blocking of the oil outlet holes, realizing precise control of the lubrication amount in the tooth width direction, so as to improve its lubrication uniformity and reduce the waste and pollution caused by the accumulation of grease on the lower side. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 A flow chart of a method for partitioned lubrication of yaw gears of a wind turbine generator set provided in an embodiment of the present application;

[0035] Figure 2 This is a logic diagram for determining the required blocking area when there is exposure in an embodiment of the present application;

[0036] Figure 3 This is a logic diagram for determining the required blocking area when there is no exposure in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] The following combination Figure 1-Figure 3 , describing the partitioned lubrication method for the yaw gear of a wind turbine generator set provided in an embodiment of the present application.

[0039] Reference Figure 1 As shown, the zoning lubrication method for the yaw gear of a wind turbine provided by the embodiment of the present application includes step S1, zone division, dividing the yaw gear working surface into three independent lubrication zones of upper, middle and lower along the axial direction;

[0040] Step S2, exposure detection, uses image detection equipment to scan the grease coverage status of each lubrication area to determine whether there is exposure and obtain exposure area data;

[0041] Step S3: graded determination: for exposed areas, whether the oil outlet holes of the grease injection pinion need to be blocked is determined based on the exposed area ratio and a preset determination threshold, and the required blocking area is determined;

[0042] For areas without exposed areas, the thickness of the lubricating grease is detected by thickness detection equipment, and the film thickness ratio is calculated. The required plugging area and the required number of pluggings are determined based on the film thickness difference ratio. The film thickness difference ratio is the difference between the film thickness ratio of each area and the preset film thickness ratio.

[0043] Step S4, executing an operation, dynamically sealing the oil outlet hole of the grease injection pinion or injecting lubricating grease into the interior thereof according to the determination result of step S3.

[0044] By dividing the yaw gear into three lubrication areas, namely, upper, middle and lower, along the axial direction, and by monitoring the condition of the grease covering the surfaces of the corresponding three lubrication areas, it is possible to promptly determine whether uneven lubrication occurs, and to determine the required sealing area when uneven lubrication occurs, thereby achieving dynamic sealing of the oil outlet holes at the corresponding positions of the grease-injected pinion, and through the dynamic sealing of the oil outlet holes, precise control of the lubrication amount in the tooth width direction is achieved, thereby improving its lubrication uniformity and reducing the waste and pollution caused by the accumulation of grease on the lower side.

[0045] In some specific embodiments, in step S2, the exposed area of ​​each region collected is recorded, and the exposed area ratio of each region is calculated based on the exposed area of ​​each region and the overall area of ​​each region;

[0046] Where K = An / A (n = 1, 2, 3), K is the exposed area ratio of each region, A1 is the exposed area of ​​the upper region, A2 is the exposed area of ​​the middle region, A3 is the exposed area of ​​the lower region, and A is the overall area of ​​each region.

[0047] Please continue reading Figure 2 ,like Figure 2 As shown, it is a logic diagram for determining the required blocking area when there is exposure in an embodiment of the present application;

[0048] In some specific embodiments, in step S3, the process of determining the exposed area ratio of each region according to a preset determination threshold is as follows:

[0049] If the exposed area ratio of the current area is less than the preset judgment threshold, the current area is judged to be a normal coverage area;

[0050] If the exposed area ratio of the current region is greater than or equal to the preset determination threshold, the current region is determined to be an exposed area and marked.

[0051] Specifically, the preset judgment threshold is the ratio of the surface area of ​​each area not covered by grease allowed on the working surface of the yaw gear under normal operating conditions to the overall area of ​​the corresponding area. Generally speaking, the preset judgment threshold shall not exceed 5% to avoid the situation where the yaw gear suffers from increased wear due to incomplete grease coverage during operation.

[0052] That is, when the proportion of the exposed area in the current region is greater than or equal to the preset judgment threshold, it means that there are a large number of exposed areas of lubricant in the current region, which cannot meet the lubrication level required by the yaw gear during normal operation. If lubrication is not replenished in time, its wear will be aggravated. Therefore, it is necessary to mark it as an exposed area to determine the area that needs replenishment.

[0053] For example, when K=A1 / A=3 / 100=3%<5%, it means that there is a certain degree of exposure in the upper lubrication area currently detected, but it is still within the normal coverage range of the lubricating grease. The exposure in this case will not affect the normal operation of the yaw gear. In order to reduce the possibility of insufficient distribution of lubricating grease in other areas due to hasty blocking and aggravate the wear condition, it can be determined as a correctly covered area and no additional operation is required.

[0054] In some specific embodiments, in step S3, each area marked as an exposed area is identified and recorded, and the process of determining whether the oil outlet hole of the grease injection pinion needs to be blocked is as follows:

[0055] If the upper, middle and lower areas are all marked as exposed areas, it is determined that the lubricating grease stored in the current grease injection pinion is insufficient, and the grease injection refilling procedure is executed;

[0056] If only the upper and middle areas are marked as exposed areas, it is determined that the current greased pinion has uneven lubrication, and the lubrication area corresponding to the normal coverage area is determined to be the required blocking area.

[0057] Specifically, if the upper and middle areas are both marked as bare leakage areas, it can be determined that the area to be blocked is the lower lubrication area. That is, when the upper and middle areas are both marked as bare leakage areas, it can be known that the lower lubrication area of ​​the current yaw gear working surface is a normal area, while the upper and middle areas have bare leakage, which leads to uneven lubrication. In order to avoid grease accumulation in the lower layer and reasonably distribute the grease, the oil outlet corresponding to the lower lubrication area can be blocked so that the grease can be distributed more to the upper or middle area.

[0058] Similarly, if only the upper area is marked as a leaking area, it can be determined that the areas that need to be blocked are the middle and lower lubrication areas. In other words, only the upper lubrication area on the working surface of the yaw gear is leaking. To properly distribute the lubricating grease and reduce the accumulation of grease due to gravity, the oil outlet holes corresponding to the middle and lower areas need to be blocked so that more lubricating grease can be distributed to the upper area to meet its lubrication needs.

[0059] When the upper, middle and lower areas are all marked as exposed areas, it can be seen that the lubricating grease stored in the grease-filled pinion may be insufficient, resulting in the oil outlet holes in the corresponding areas being unable to meet the normal oil output required, and then causing the three areas of the yaw gear to be exposed. Lubricating grease needs to be injected into the interior before testing.

[0060] In some specific embodiments, in step S3, the process of determining whether the oil outlet hole of the grease injection pinion needs to be blocked further includes:

[0061] If the upper, middle and lower areas are all normal coverage areas, there is no need to block the oil outlet hole of the grease injection pinion.

[0062] Specifically, if the upper, middle and lower areas are all normal areas, it means that the lubricating grease covering the current yaw gear is sufficient to meet its normal operating requirements. There is no need to seal the grease-injected pinion or inject lubricating grease into the grease-injected pinion.

[0063] Please continue reading Figure 3 ,like Figure 3 As shown, it is a logic diagram for determining the required blocking area when there is no exposure in the embodiment of the present application;

[0064] In some specific embodiments, in step S3, when the image detection equipment detects that there is no exposure in the three independent lubrication areas of upper, middle and lower areas, the thickness of the lubricating grease covering the surface of each area will be detected by the thickness detection equipment, and the coverage thickness of the lubricating grease in each area will be collected and recorded.

[0065] Specifically, the image detection equipment used is an industrial camera array that can detect whether the surface of the yaw gear is covered with grease and collect data on uncovered areas, or a high-definition monitoring system that uses multispectral imaging technology. The thickness detection equipment is an infrared detection device or radar detection equipment that can obtain the thickness of the lubricating grease covering the surface of the yaw gear.

[0066] When there is no exposure in the upper, middle and lower three independent lubrication areas, it means that there is no uneven lubrication on the surface of the yaw gear due to the lack of grease coverage. Although the yaw gear can be lubricated normally, the grease on its surface may still be accumulated and unevenly lubricated due to excessive local grease distribution, or the grease in the upper area may flow down due to gravity, resulting in uneven lubrication and material waste caused by grease accumulation in the local area. Therefore, it is necessary to detect the coverage thickness of the grease on its surface to determine whether there is uneven lubrication on the surface of the yaw gear due to grease accumulation, which causes contamination of other equipment or waste of materials.

[0067] In some specific embodiments, the coverage thickness of the lubricating grease in each region is arranged and compared to obtain the film thickness ratio between each region;

[0068] Among them, K1=H1:H2, K2=H2:H3, K1 is the film thickness ratio between the upper layer and the middle layer, K2 is the film thickness ratio between the middle layer and the lower layer, H1 is the coverage thickness of the lubricating grease in the upper layer area, H2 is the coverage thickness of the lubricating grease in the middle layer area, and H3 is the lubricating grease in the lower layer area.

[0069] In some specific embodiments, in step S3, a preset film thickness ratio is further provided, and the obtained film thickness ratios between the regions are determined according to the preset film thickness ratios:

[0070] If the obtained film thickness ratio between each area is greater than or equal to the preset film thickness ratio, it is determined that it is a normal coverage area and there is no need to block the oil outlet hole of the grease injection pinion;

[0071] If the obtained film thickness ratio between each area is less than the preset film thickness ratio, it is determined that the current grease-injected pinion has uneven lubrication, and the lower lubrication area in the current comparison area is determined to be the required sealing area. The preset film thickness ratio and the current film thickness ratio are calculated to obtain the required number of seals for each oil outlet in the required sealing area.

[0072] Due to the traditional grease injection pinion oil hole design, 90% of the grease is discharged from the lower discharge hole due to weight accumulation, and the upper discharge hole has almost no lubrication. In addition, the grease discharged from the upper discharge hole will also flow down the tooth surface due to gravity, resulting in oil shortage on the upper side of the gear ring and grease accumulation on the lower side. Therefore, when determining the required blocking area for uneven lubrication caused by uneven grease coverage, it is necessary to select the lower lubrication area as the required blocking area. By reducing the grease discharge in the lower area, the distribution amount in the upper area can be appropriately increased.

[0073] Specifically, the preset film thickness ratio is the film thickness ratio that the grease on the surface of the yaw gear should have when no grease accumulation occurs under the influence of gravity under normal operating conditions. Generally speaking, when the yaw gear working surface is evenly divided into three independent lubrication areas, namely, upper, middle, and lower, along the axial direction, the grease distribution thickness ratio of the three independent lubrication areas when no grease accumulation occurs generally does not exceed 1:1.2:1.5 for upper layer:middle layer:lower layer. Therefore, the preset film thickness ratio can be selected as 1:(1-1.2). In this embodiment, 1:1.2 can be selected as the preset film thickness ratio to increase its fault tolerance rate.

[0074] For example, when the obtained K1=H1:H2=1:1.1, K2=H2:H3=1.1:1.43=1:1.3, it can be determined that the grease thickness distribution between the upper and middle layers is normal, and there is no grease accumulation, while the grease thickness distribution between the middle and lower layers is abnormal, resulting in abnormal accumulation of grease in the lower layer, causing uneven lubrication. In order to avoid pollution and waste caused by continuous accumulation of grease in the lower layer, the lower layer area can be determined as the required blocking area, and the oil outlet holes corresponding to the lower lubrication area can be blocked, and the grease distribution amount in the lower layer area can be appropriately reduced;

[0075] Furthermore, the process of obtaining the required number of pluggings for each oil outlet in the required plugging area is calculated based on the preset film thickness ratio and the current film thickness ratio: Nf = (Kn / Ky-1) × N, and rounding up if the result is not an integer, wherein Nf is the required number of pluggings, N is the total number of oil outlets corresponding to the current required plugging area, Kn is the current film thickness ratio, Ky is the preset film thickness ratio, and N involved in the calculation should be adaptively selected and determined based on the brand of the selected grease injection pinion. For example, when the grease injection pinion used is the River Valley series with a total number of 96 oil outlet holes, N involved in the calculation = 96 / 3 = 32 (pieces).

[0076] In some specific embodiments, a preset film thickness threshold is further provided in step S3. When it is determined that both the middle and lower areas are areas to be blocked, the thickness of the lubricating grease in the upper lubricating area is obtained and compared with the thickness of the lubricating grease in the lower lubricating area to obtain a determined film thickness value, and the determined film thickness value is determined according to the preset film thickness threshold:

[0077] If the film thickness value is determined to be greater than or equal to the preset film thickness threshold, the oil holes in the required blocking area corresponding to the lower lubrication area will be completely blocked, and the required number of blocking of each oil hole in the required blocking area will be calculated based on this.

[0078] Among them, K3 = H1:H3, K3 is the film thickness determination value, and the preset film thickness threshold is the film thickness ratio between the upper lubrication area and the lower lubrication area when the grease on the surface of the yaw gear just begins to accumulate under the influence of gravity. As mentioned above, in order to reduce pollution and waste caused by grease accumulation, the preset film thickness threshold should not exceed 1:1.5;

[0079] Specifically, when determining the required plugging area when no exposure occurs, when it is detected that both the middle and lower areas are required plugging areas, in order to avoid the grease in the lower lubrication area exceeding the grease distribution thickness ratio that should be in the three independent lubrication areas under normal circumstances, thereby causing partial plugging to be unable to promptly and effectively solve the uneven lubrication situation, it is necessary to separately compare the film thickness ratio between the upper lubrication area and the lower lubrication area to confirm whether the oil outlet holes in the required plugging area corresponding to the lower lubrication area are completely blocked;

[0080] That is, when the value of K3 is greater than 1:1.5, it means that a large amount of lubricating grease has accumulated in the lower lubrication area, and partial blocking is no longer able to cope with the uneven lubrication caused by the grease accumulation. Therefore, all the oil holes corresponding to the lower lubrication area must be blocked to reduce the grease distribution in the lower lubrication area. At this time, in order to further reduce the accumulation of grease distributed to the oil holes corresponding to the upper or middle areas, the required number of blocked oil holes in the required blocked area can be recalculated, Nf = (1-Ky / Kn) × N. If the result is not an integer, round it up to block as many oil holes as possible.

[0081] In some specific embodiments, in step S4, the oil outlet hole of the grease injection pinion is evenly divided axially into three sealing areas: upper, middle and lower layers corresponding to the lubrication area of ​​the yaw gear, and the oil outlet holes in the corresponding areas are sealed according to the determined required sealing areas and the required number of sealings.

[0082] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0084] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0085] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A partitioned lubrication method for yaw gears of a wind turbine generator set, characterized in that: include: Step S1: area division, dividing the yaw gear working surface into three independent lubrication areas: upper, middle, and lower along the axial direction; Step S2, exposure detection, uses image detection equipment to scan the grease coverage status of each lubrication area to determine whether there is exposure and obtain exposure area data; Step S3: graded determination: for exposed areas, whether the oil outlet holes of the grease injection pinion need to be blocked is determined based on the exposed area ratio and a preset determination threshold, and the required blocking area is determined; For areas without exposed areas, the thickness of the lubricating grease is tested by thickness testing equipment, and the film thickness ratio is calculated. The required plugging area and the required number of pluggings are determined based on the film thickness difference ratio. Step S4, executing an operation, dynamically sealing the oil outlet hole of the grease injection pinion or injecting lubricating grease into the interior thereof according to the determination result of step S3.

2. The method for lubricating the yaw gear of a wind turbine generator set according to claim 1, characterized in that: In step S2, the exposed area of ​​each region collected is recorded, and the exposed area ratio of each region is calculated based on the exposed area of ​​each region and the overall area of ​​each region; Where K = An / A (n = 1, 2, 3), K is the exposed area ratio of each region, A1 is the exposed area of ​​the upper region, A2 is the exposed area of ​​the middle region, A3 is the exposed area of ​​the lower region, and A is the overall area of ​​each region.

3. The method for lubricating the yaw gear of a wind turbine generator set according to claim 2, characterized in that: In step S3, the process of determining the exposed area ratio of each region according to the preset determination threshold is as follows: If the exposed area ratio of the current area is less than the preset determination threshold, the current area is determined to be a normal coverage area; If the exposed area ratio of the current region is greater than or equal to the preset determination threshold, the current region is determined to be an exposed region and marked.

4. The method for lubricating the yaw gear of a wind turbine generator set according to claim 3, characterized in that: In step S3, each area marked as an exposed area is identified and recorded, and the process of determining whether the oil outlet hole of the grease injection pinion needs to be blocked is as follows: If the upper, middle and lower areas are all marked as exposed areas, it is determined that the lubricating grease stored in the grease injection pinion is insufficient, and the grease injection refilling procedure is executed; If only the upper and middle areas are marked as exposed areas, it is determined that the current grease-injected pinion has uneven lubrication, and the lubrication area corresponding to the normal coverage area is determined to be the required blocking area.

5. The method for lubricating the yaw gear of a wind turbine generator set according to claim 4, characterized in that: In step S3, the process of determining whether the oil outlet hole of the grease injection pinion needs to be blocked further includes: If the upper, middle and lower areas are all normal coverage areas, there is no need to block the oil outlet hole of the grease injection pinion.

6. The method for lubricating the yaw gear of a wind turbine generator set according to claim 5, characterized in that: In step S3, when the image detection device detects that the upper, middle and lower three independent lubrication areas are not exposed, the thickness detection device will detect and collect the thickness of the lubricating grease covering the surface of each area.

7. The method for lubricating the yaw gear of a wind turbine generator set according to claim 6, characterized in that: Arrange and compare the coverage thickness of lubricating grease in each area to obtain the film thickness ratio between each area; Among them, K1=H1:H2, K2=H2:H3, K1 is the film thickness ratio between the upper layer and the middle layer, K2 is the film thickness ratio between the middle layer and the lower layer, H1 is the coverage thickness of the lubricating grease in the upper layer area, H2 is the coverage thickness of the lubricating grease in the middle layer area, and H3 is the lubricating grease in the lower layer area.

8. The method for zoned lubrication of yaw gears of a wind turbine generator set according to claim 7, characterized in that: In step S3, a preset film thickness ratio is further provided, and the obtained film thickness ratios between the regions are determined according to the preset film thickness ratio: If the film thickness ratio between the obtained areas is greater than or equal to the preset film thickness ratio, it is determined that it is a normal coverage area and there is no need to block the oil outlet hole of the grease injection pinion; If the film thickness ratio between the obtained areas is less than the preset film thickness ratio, it is determined that the current grease-injected pinion has uneven lubrication, and the lower lubrication area in the current comparison area is determined to be the required sealing area. The preset film thickness ratio and the current film thickness ratio are calculated to obtain the required number of seals for each oil outlet in the required sealing area.

9. The method for zoned lubrication of yaw gears of a wind turbine generator set according to claim 8, characterized in that: In step S3, a preset film thickness threshold is also set. When it is determined that both the middle and lower areas are required blocking areas, the thickness of the lubricating grease in the upper lubrication area is obtained and compared with the thickness of the lubricating grease in the lower lubrication area to obtain a determined film thickness value, and the determined film thickness value is determined according to the preset film thickness threshold: If the determined film thickness value is greater than or equal to the preset film thickness threshold, the oil outlet holes at the required blocking area corresponding to the lower lubrication area will be completely blocked.

10. The method for zoned lubrication of yaw gears of a wind turbine generator set according to claim 1, characterized in that: In step S4, the oil outlet hole of the grease injection pinion is evenly divided into three sealing areas, namely, upper, middle and lower layers, corresponding to the lubrication area of ​​the yaw gear along the axial direction, and the oil outlet holes in the corresponding areas are sealed according to the determined required sealing areas and the required number of sealings.

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