Monitoring system and monitoring method

Abstract

The embodiment of the present application provides a kind of monitoring system and monitoring method, monitoring method, for monitoring the leakage situation of lubricating medium of parts in wind turbine unit, monitoring method includes: in the lubricating medium leakage of target part, set up the grease receiving container for receiving leaked lubricating medium;According to the actual leakage amount M of received leaked lubricating medium x ;According to actual leakage amount M x Determine whether the lubricating medium leakage of target part is abnormal.The monitoring method of the embodiment of the present application can accurately judge the leakage situation of lubricating medium, so as to facilitate timely supplement lubricating medium, improve the problem of lubrication of target part.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a monitoring system and a monitoring method. BACKGROUND

[0002] The main shaft bearing of a wind turbine is one of the important core components of the unit, and its service life is related to the service life of the entire wind turbine. Once the main shaft bearing fails, it is very difficult and expensive to replace it. As we all know, lubrication plays a crucial role in bearing. According to statistics, the proportion of poor lubrication in bearing damage is as high as 40%, so bearing lubrication is very critical. If there is a problem with the lubrication of the main shaft bearing, it will reduce the service life of the bearing and cause major failures and economic losses to the unit operation. Such low-speed and heavy-load bearings are almost lubricated with grease. Currently, in the design and maintenance of the unit, attention is often only paid to the addition of grease, and for a long time, the maintenance and management of the wind turbine have not paid enough attention to the grease leakage of the main shaft bearing. There is no feasible method to measure the amount of lubricating grease inside the main shaft bearing (including the inside of the bearing seat), which makes it difficult to ensure that there is enough grease inside the main shaft bearing for good lubrication of the bearing.

[0003] Currently, some manufacturers install temperature sensors on the bearing seat and use bearing temperature monitoring methods to indirectly judge the bearing lubrication condition, but the high temperature of the bearing can be caused by many reasons, such as overload, poor heat dissipation, excessive addition of grease, etc. Lack of grease is only one of the reasons for high bearing temperature, so this method is not accurate for early warning of bearing lubrication condition, and it cannot monitor the amount of grease inside the bearing, and even the maintenance personnel may mistakenly add excessive grease to the main shaft bearing, which will also cause poor lubrication. SUMMARY

[0004] The embodiments of the present application provide a monitoring system and a monitoring method, which aims to improve the accuracy of monitoring the amount of lubricating grease of parts in a wind turbine unit.

[0005] The embodiments of the first aspect of the present application provide a monitoring method for monitoring the leakage of a lubricating medium of a part in a wind turbine unit, the monitoring method comprising:

[0006] setting a grease receiving container for receiving the leaked lubricating medium at a lubricating medium leakage position of the target part;

[0007] determining an actual leakage amount M x of the leaked lubricating medium according to the received leaked lubricating medium;

[0008] determining whether the lubricating medium leakage of the target part is abnormal according to the actual leakage amount M x .

[0009] According to the embodiments of the first aspect of the present application, in the step of determining whether the lubricating medium leakage of the target part is abnormal according to the actual leakage amount Mx Before the step of determining whether the lubricating medium leakage of the target part is abnormal, the monitoring method further comprises:

[0010] obtaining the lubricating medium injection amount M of the target part j ;

[0011] determining the lubricating medium leakage threshold M according to the lubricating medium injection amount M j ; max wherein M max =k×M j , 0<k≤1;

[0012] In the step of determining whether the lubricating medium leakage of the target part is abnormal according to the actual leakage amount M x , the monitoring method further comprises: when M x is greater than or equal to M max , determining that the lubricating medium leakage of the target part is abnormal.

[0013] According to any one of the foregoing embodiments of the first aspect of the present application, in the step of obtaining the lubricating medium injection amount M j of the target part: determining the amount of lubricating medium injected into the target part last time before the grease container starts to receive the lubricating medium leakage as the lubricating medium injection amount M j .

[0014] According to any one of the foregoing embodiments of the first aspect of the present application, in the step of determining that the lubricating medium leakage of the target part is abnormal when M x is greater than or equal to M max , the step further comprises:

[0015] when M max ≤M x <M1, determining that the lubricating medium leakage of the target part is slight and issuing a warning signal;

[0016] when M1≤M x <M2, determining that the target part needs to be supplemented with lubricating medium and issuing a lubricating medium supplement signal;

[0017] when M2≤M x , determining that the lubricating medium leakage of the target part is serious and issuing a shutdown and troubleshooting signal, wherein M max <M1<M2.

[0018] According to any one of the foregoing embodiments of the first aspect of the present application, in the step of determining that the lubricating medium leakage of the target part is abnormal when M x is greater than or equal to M max , the step further comprises:

[0019] when M1≤M xWhen M2 is determined, the replenishment amount of the lubricating medium required for replenishment is determined as h x M2, where h≥1.

[0020] According to any one of the preceding embodiments of the first aspect of the present application, when the actual leakage amount M x The step of determining whether the leakage of the lubricating medium of the target part is abnormal further comprises:

[0021] determining a first time when the lubricating medium was last injected into the target part before the lubricating medium leakage container began to receive the leakage of the lubricating medium;

[0022] determining that the actual leakage amount Mx of the lubricating medium is greater than the leakage threshold M max of the lubricating medium;

[0023] determining that the target part is not tightly sealed when the time difference between the first time and the second time is less than or equal to the first time threshold;

[0024] determining that the lubricating medium in the target part is softened when the time difference between the first time and the second time is greater than or equal to the second time threshold.

[0025] The embodiments of the second aspect of the present application also provide a monitoring system for monitoring the leakage amount of a lubricating medium of a part in a wind turbine generator set, the monitoring system comprising:

[0026] a support having a support base and a weighing device arranged on the support base;

[0027] a lubricating medium receiving container arranged on the support base, the lubricating medium receiving container being configured to receive the leaked lubricating medium;

[0028] a controller configured to obtain, by the weighing device, an actual leakage amount M x of the leaked lubricating medium in the lubricating medium receiving container, and configured to determine whether the leakage of the lubricating medium of the target part is abnormal based on the actual leakage amount M x .

[0029] According to the embodiments of the second aspect of the present application, the support further comprises a plurality of side walls connected to the periphery of the support base, and a containing space enclosed by the plurality of side walls and the support base, and the lubricating medium receiving container is located in the containing space, wherein at least one of the side walls is provided with a buffer pad on the surface thereof facing the containing space.

[0030] According to any one of the preceding embodiments of the second aspect of the present application, the controller comprises:

[0031] an information obtaining unit configured to obtain an injection amount M j of the lubricating medium of the target part, and configured to determine k x M j as the leakage threshold M j of the lubricating medium based on the injection amount M max of the lubricating medium.

[0032] determining unit for determining that the lubricating medium leakage of the target part is abnormal when M x is greater than or equal to M max , where 0<k≤1.

[0033] According to the second aspect of the present application, in any of the above embodiments, the determining unit is further configured to determine that the leakage is slight and send a pre-warning signal when M max is less than M x , determine that the lubricating medium needs to be replenished and send a lubricating medium replenishment signal when M x is less than M x , and determine that the leakage is serious and send a shutdown and troubleshooting signal when M max is greater than M x .

[0034] According to the second aspect of the present application, in any of the above embodiments, the controller further comprises a replenishment amount calculation unit configured to determine the replenishment amount of the lubricating medium as h×M x when M x .

[0035] According to the second aspect of the present application, in any of the above embodiments, the controller further comprises:

[0036] a first acquisition unit configured to acquire a first time at which the lubricating medium was last injected into the target part before the lubricating medium leakage container started to receive the lubricating medium leakage;

[0037] a second acquisition unit configured to acquire a second time at which the actual lubricating medium leakage M max is greater than the lubricating medium leakage threshold M max .

[0038] a determining unit configured to determine that the target part is not tightly sealed when the time difference between the first time and the second time is less than or equal to a first time threshold, and determine that the lubricating medium in the target part is softened when the time difference between the first time and the second time is greater than or equal to a second time threshold.

[0039] According to the second aspect of the present application, in any of the above embodiments, the controller further comprises a cleaning record unit configured to re-record the current leakage weight.

[0040] According to the second aspect of the present application, in any of the above embodiments, the controller further comprises:

[0041] an input unit configured to input historical lubricating medium leakage data;

[0042] and / or a display unit configured to display the leakage data.

[0043] In the monitoring method provided by the embodiment of the present application, the monitoring method is used for monitoring the leakage of lubricating medium of a component in a wind turbine generator system. The monitoring method first sets a grease receiving container at a lubricating medium leakage position of the target component, the grease receiving container can receive the leaked lubricating medium, so as to obtain the leakage amount of the lubricating medium. Then, the actual leakage amount of the leaked lubricating medium is determined according to the leaked lubricating medium, and finally, whether the leakage of the lubricating medium of the target component is abnormal or not is determined according to the actual leakage amount. The monitoring method of the present application can obtain the actual leakage amount of the lubricating medium, and determine whether the leakage of the lubricating medium of the target component is abnormal or not according to the actual leakage amount of the lubricating medium, so that the determination result is more accurate. Therefore, the monitoring method of the embodiment of the present application can accurately determine the leakage of the lubricating medium, so as to facilitate timely supplement of the lubricating medium and improve the lubrication problem of the target component. BRIEF DESCRIPTION OF DRAWINGS

[0044] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof as taken in conjunction with the accompanying drawings, in which like references denote like features.

[0045] Figure 1 is a flowchart of a monitoring method provided by a first aspect of the present application;

[0046] Figure 2 is a partial flowchart of a monitoring method provided by another embodiment of the present application;

[0047] Figure 3 is a leakage amount curve of a lubricating medium;

[0048] Figure 4 is a leakage amount curve of another lubricating medium;

[0049] Figure 5 is a leakage amount curve of still another lubricating medium;

[0050] Figure 6 is a leakage amount curve of yet another lubricating medium;

[0051] Figure 7 is a leakage amount curve of still another lubricating medium;

[0052] Figure 8 is a structural diagram of a monitoring system provided by a second aspect of the present application;

[0053] Figure 9 is a structural diagram of a support of a monitoring system provided by the second aspect of the present application;

[0054] Figure 10 is a top view of the support of the monitoring system provided by the second aspect of the present application;

[0055] Figure 11 is a structural schematic view of a support and a grease receiving container of a monitoring system according to an embodiment of the second aspect of the present application;

[0056] Figure 12 is a structural schematic view of a controller 300 of a monitoring system 10 according to another embodiment of the second aspect of the present application;

[0057] Figure 13 is a structural schematic view of a controller 300 of a monitoring system 10 according to another embodiment of the second aspect of the present application;

[0058] Figure 14 is a structural schematic view of a controller 300 of a monitoring system 10 according to another embodiment of the second aspect of the present application;

[0059] Figure 15 is a structural schematic view of a wind turbine generator according to an embodiment of the third aspect of the present application.

[0060] BRIEF DESCRIPTION OF DRAWINGS

[0061] 10, monitoring system; 20, main control machine; 30, central monitoring platform; 40, main shaft bearing;

[0062] 100, support; 110, support bottom plate; 120, load cell; 130, side wall; 140, cushion pad; 150, connecting member;

[0063] 200, grease receiving container;

[0064] 300, controller; 310, information acquisition unit; 320, determination unit; 330, filling amount calculation unit; 340, first acquisition unit; 350, second acquisition unit; 360, determination unit; 370, filling amount calculation unit; 380, input unit; 390, display unit. DETAILED DESCRIPTION

[0065] Features and exemplary embodiments of the various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely illustrative of the present application and is not intended to limit the present application, as is apparent to one of ordinary skill in the art. In the following description, well-known structures and techniques have not been shown in order not to obscure the present application with details that are well known to one of ordinary skill in the art. Also, in the following description, the dimensions of the various structures can be exaggerated for the sake of clarity. Furthermore, the features, structures or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0066] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0067] The orientation words appearing in the following description are the directions shown in the drawings, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In order to better understand the present application, the following will be combined with Figures 1 to 15 The monitoring system and the monitoring method of the embodiments of the present application are described in detail.

[0069] Figure 1 A flowchart of a monitoring method provided by the first aspect of the present application is shown. The monitoring method provided by the first aspect of the present application is used to monitor the leakage of lubricating medium of parts in a wind turbine generator set.

[0070] As Figure 1 shown, the monitoring method provided by the first aspect of the present application comprises:

[0071] Step S01: A grease receiving container is arranged at the lubricating medium leakage position of the target part to receive the leaked lubricating medium.

[0072] Step S02: According to the received leaked lubricating medium, the actual leakage amount M x of the leaked lubricating medium is determined.

[0073] Step S03: According to the actual leakage amount M x , it is determined whether the leakage of the lubricating medium of the target part is abnormal.

[0074] In the monitoring method provided by the embodiment of the present application, the monitoring method is used for monitoring the leakage of lubricating medium of a component in a wind turbine generator set. First, according to step S01, a grease receiving container is arranged at a lubricating medium leakage position of the target component, the grease receiving container can receive the leaked lubricating medium, so as to obtain the leakage amount of the lubricating medium. Then, according to the leaked lubricating medium, the actual leakage amount M of the leaked lubricating medium is determined in step S02 x . Finally, according to the actual leakage amount M x , it is determined whether the leakage of the lubricating medium of the target component is abnormal in step S03. The monitoring method of the present application can obtain the actual leakage amount M of the lubricating medium x , and determine whether the leakage of the lubricating medium of the target component is abnormal according to the actual leakage amount M of the lubricating medium x , so that the determination result is more accurate. Therefore, the monitoring method of the embodiment of the present application can accurately determine the leakage of the lubricating medium, so as to facilitate timely supplement of the lubricating medium and improve the lubrication problem of the target component.

[0075] In step S03, there are various methods for determining whether the leakage of the lubricating medium of the target component is abnormal according to the actual leakage amount M x . For example, a historical lubricating medium leakage monitoring data model of the target component is obtained, the actual leakage amount M x is compared with the data monitoring model, so as to determine whether the leakage of the lubricating medium of the target component is abnormal.

[0076] There are various methods for constructing the monitoring data model, for example, the historical lubricating medium leakage data of the target component and the data of the abnormality of the target component can be obtained, and then the monitoring data model is constructed. Alternatively, the monitoring data model can also be constructed according to the lubricating medium injection data of the target component, the historical lubricating medium leakage data, the data of the abnormality of the target component, and the data that the abnormality of the target component is caused by insufficient lubricating medium.

[0077] In some other optional embodiments, the leakage data of the target component under normal conditions can also be obtained, the actual leakage amount M x is compared with the normal data, so as to determine whether the leakage of the lubricating medium of the target component is abnormal.

[0078] Please refer to Figure 2 , Figure 2 which is a flowchart of a monitoring method according to another embodiment of the first aspect of the present application.

[0079] As shown in Figure 2 , in some other optional embodiments, before step S03, the monitoring method further comprises:

[0080] Step S011: obtaining the lubricating medium injection amount M j of the target component.

[0081] Step S012: According to the injection amount M of the lubricating medium j Determine the leakage threshold M of the lubricating medium max , wherein M max = k x M j , 0 < k ≤ 1.

[0082] Then in step S03: when the actual leakage amount M x is greater than or equal to the leakage threshold M max , it is determined that the lubricating medium leakage of the target part is abnormal.

[0083] In these optional embodiments, before step S03, the injection amount M of the lubricating medium j is obtained through step S011 first, and then the leakage threshold M of the lubricating medium max is confirmed through step S03. Comparing the actual leakage amount M x with the leakage threshold M max in step S03 to determine whether the lubricating medium of the target part is abnormal can further improve the accuracy of the judgment result.

[0084] There are many ways to set the value of k, and users can select a suitable k value according to actual needs, as long as 0 < k ≤ 1. For example, when the lubricating medium leakage has little effect on the operation of the target part, or when the injection amount of the lubricating medium is large, the value of k can be large, for example, k can be 0.8, 0.9 or larger. When the lubricating medium leakage has a large effect on the operation of the target part, or when the injection amount of the lubricating medium is small, the value of k can be small, for example, k can be 0.3, 0.2 or smaller.

[0085] Step S011 can be performed before step S01, or step S011 can be performed after step S01 and before step S03.

[0086] The injection amount M of the lubricating medium j can be selected in many ways, for example, the historical injection amount of the lubricating medium of the target part can be selected as the injection amount M of the lubricating medium j .

[0087] In other optional embodiments, the amount of the lubricating medium last injected into the target part before the grease container starts to receive the lubricating medium leakage is determined as the injection amount M of the lubricating medium j .

[0088] When the target part is injected with the lubricating medium, it indicates that the current target part is insufficient in the lubricating medium, and the injected lubricating medium is at least greater than or equal to the amount of the lubricating medium deficiency of the target part. In these optional embodiments, the injection amount M of the lubricating medium is the amount of the lubricating medium injected to the target part last time before the grease container starts to receive the lubricating medium leakage j , which can further improve the accuracy of the monitoring result.

[0089] Please refer to Figure 3 , Figure 3 is a leakage amount curve of the lubricating medium.

[0090] In step S012, when M x is greater than or equal to M max , there are various methods to determine that the lubricating medium leakage of the target part is abnormal, and in step S012, when M max ≤M x <M1, it is determined that the leakage is slight and a warning signal is sent, as in the first case in Figure 3 ; when M max ≤M x <M1, it is determined that the lubricating medium leakage of the target part is slight and a warning signal is sent; when M1≤M x <M2, it is determined that the lubricating medium needs to be supplemented to the target part and a lubricating medium supplement signal is sent, as in the second case in Figure 3 ; when M2≤M x , it is determined that the lubricating medium leakage of the target part is serious and a shutdown and troubleshooting signal is sent, as in the third case in Figure 3 , wherein M max <M1<M2.

[0091] In these optional embodiments, different warning signals can be sent according to different actual leakage amounts M x . When M max ≤M x <M1, it indicates that the actual lubricating medium leakage amount M x of the current target part is slight, and no maintenance measures are taken temporarily, which will not affect the normal operation of the target part, but the lubricating medium leakage of the target part needs to be closely tracked in the later period to discover the lubricating medium deficiency in time. When M1≤M x <M2, it indicates that the actual lubricating medium leakage amount M x of the current target part is large, and the lubricating medium leakage may affect the normal operation of the target part, so the lubricating medium should be supplemented in time to avoid the influence of the lubricating medium leakage on the normal operation of the target part. When M2≤M xWhen it indicates that the leakage of the current lubricating medium has already or seriously affected the normal operation of the target part, it is necessary to stop the machine in time for troubleshooting. Therefore, in the embodiments of the present invention, according to the actual leakage amount M x different signals are sent, facilitating the user to take corresponding maintenance countermeasures according to the different actual leakage amounts M x of different values.

[0092] When M1 ≤ M x < M2, it is necessary to add lubricating medium to the target part. There are various ways to set the amount of lubricating medium added to the target part. For example, the user can add lubricating medium to the target part according to the actual leakage amount M x of different values.

[0093] In some optional embodiments, when M1 ≤ M x < M2, it is determined that the replenishment amount of the lubricating medium to be replenished is h × M2, where h ≥ 1. According to the embodiments of the present invention, a sufficient amount of lubricating medium can be replenished.

[0094] When M1 ≤ M x < M2, and it is determined that the target part has been re-lubricated with the lubricating medium, the actual leakage amount M x can continue to be accumulated. At this time, the lubricating medium injection amount M j is selected as the sum of the amount of lubricating medium injected into the target part in the most recent injection before the grease receiving container starts to receive the leakage of the lubricating medium and the amount of lubricating medium injected during the current flushing.

[0095] Optionally, within one maintenance cycle, when cleaning the lubricating medium in the grease receiving container, the cumulative leakage amount of the lubricating medium is recorded as the actual leakage amount M x .

[0096] Optionally, the monitoring method provided in any of the above first aspect embodiments is carried out within one maintenance cycle. For example, when the monitoring method is used to monitor the leakage amount of the lubricating medium of the main shaft bearing in a wind turbine generator set, the leakage amount of the lubricating medium of the main shaft bearing in the wind turbine generator set is monitored in cycles with one maintenance cycle as the period. The user can set the maintenance cycle according to actual usage requirements. For example, the maintenance cycle can be 6 months. In other embodiments, the maintenance cycle can also be 3 months, 9 months, one year, etc.

[0097] In some optional embodiments, the leakage cause can also be determined according to the actual leakage amount M x of the lubricating medium. Before step S03, it further includes: determining the first time of the most recent injection of lubricating medium into the target part before the grease receiving container starts to receive the leakage of the lubricating medium; determining that the actual leakage amount M x of the lubricating medium is greater than the lubricating medium leakage threshold M maxa second time; determining that the target part is not sealed tightly when a time difference between the first time and the second time is less than or equal to a first time threshold; and determining that the lubricating medium in the target part is softened when the time difference between the first time and the second time is greater than or equal to a second time threshold.

[0098] In these optional embodiments, the injection time of the lubricating medium is determined first, and then the time when the actual leakage amount of the lubricating medium is greater than the leakage threshold, i.e., the actual leakage amount M x is greater than the lubricating medium leakage threshold M max When the time difference between the first time and the second time is less than or equal to the first time threshold, it means that the leakage amount of the lubricating medium exceeds the lubricating medium leakage threshold M max in a short time, and the lubricating medium leaks at a relatively fast speed, which is likely to be caused by the fact that the target part is not sealed tightly. When the time difference between the first time and the second time is greater than or equal to the second time threshold, it means that the leakage of the lubricating medium is abnormal after a long time, which is likely to be caused by the fact that the lubricating medium is softened after the target part is operated for a long time, resulting in that the lubricating medium is prone to leakage.

[0099] The first time threshold and the second time threshold can be set in various ways, for example, the first time threshold and the second time threshold can be determined according to historical data. For example, the first time threshold can be set according to the leakage of the lubricating medium when the target part is not sealed tightly in the historical data. As long as the time difference between the first time and the second time is less than or equal to the first time threshold, it means that the leakage amount of the lubricating medium exceeds the lubricating medium leakage threshold M max in a short time, and the lubricating medium leaks at a relatively fast speed, which is likely to be caused by the fact that the target part is not sealed tightly. For example, the second time threshold can be set according to the situation when the lubricating medium is softened in the historical data. As long as the time difference between the first time and the second time is greater than or equal to the second time threshold, it means that the leakage of the lubricating medium is abnormal after a long time, which is likely to be caused by the fact that the lubricating medium is softened after the target part is operated for a long time.

[0100] Optionally, in the step of determining that the lubricating medium in the target part is softened when the time difference between the first time and the second time is greater than or equal to the second time threshold, when the time difference between the first time and the second time is greater than or equal to the second time threshold, and the leakage amount of the lubricating medium in a specified time period exceeds a preset threshold, it is determined that the lubricating medium in the target part is softened. When the leakage amount of the lubricating medium in a specified time period exceeds a preset threshold, it means that the leakage speed of the lubricating medium suddenly increases after a period of time, which is likely to be caused by the fact that the lubricating medium is softened after the target part is operated for a long time, resulting in that the lubricating medium is prone to leakage.

[0101] As shown in Figure 4 , the solid line represents the normal leakage process, the dotted line represents the first leakage case, and the dashed line represents the second leakage case. The first leakage case indicates that the leakage speed of the lubricating medium is greater than the normal speed after the main shaft bearing is just refilled with the lubricating medium, so that the actual leakage amount M x of the lubricating medium exceeds the leakage threshold M max in a short time.

[0102] Assuming that the first time threshold is 1 month, as shown in Figure 4 , the actual leakage amount M x of the lubricating medium exceeds the leakage threshold M max in about half a month after the lubricating medium is injected, which may be caused by the fact that the sealing ring of the bearing has a decreased sealing performance or is partially detached, resulting in too fast leakage of the lubricating medium.

[0103] In addition, the second leakage case indicates that the leakage is normal before the end of the fourth month, and the leakage speed increases after that, that is, the time difference between the first time and the second time is greater than or equal to the second time threshold, which may be caused by the fact that the lubricating medium has increased fluidity as the ambient temperature increases, and the preliminary diagnosis is that the lubricating medium has a certain degree of softening.

[0104] Optionally, the lubricating medium may also leak under normal circumstances during the actual operation of the target part. The monitoring method provided in the embodiment of the present application is performed within one maintenance period, that is, the leakage amount of the lubricating medium is monitored within one lubricating medium leakage maintenance period to determine whether the leakage amount is abnormal. The maintenance period is, for example, 6 months.

[0105] As shown in Figure 5 , within one maintenance period (for example, one maintenance period is 6 months), the leakage amount of the lubricating medium should gradually tend to the lubricating medium leakage threshold M max under normal circumstances, but will not exceed the lubricating medium leakage threshold M max . Moreover, the leakage amount curve of the lubricating medium is relatively smooth.

[0106] As shown in Figure 6 , when the leakage of the lubricating medium is abnormal, the leakage amount of the lubricating medium will exceed the lubricating medium leakage threshold M max within one maintenance period. Figure 6 The leakage of the lubricating medium includes two cases. In the first case, the lubricating medium leaks at a relatively stable speed. In the second case, the leakage of the lubricating medium may be unstable, resulting in a wavy leakage curve of the lubricating medium

[0107] The target part is overhauled at the beginning of the overhaul cycle, and the overhaul personnel add lubricating medium into the target part. It is assumed that the length of the overhaul cycle is 6 months. After the lubricating medium is added, the actual leakage amount M x is modified to 0. According to actual use requirements, the user can also input the lubricating medium addition amount of this time. The monitoring system is caused to perform relevant data calculation and storage, so as to facilitate later management and fault analysis of the target part. After the overhaul is completed, the old grease of the main shaft bearing will flow out from the sealing ring to be drained along with the operation of the unit.

[0108] As shown in FIG. 1, the monitoring system 10 is provided with a display 100, a keyboard 200, a memory 300, a processor 400, and a communication interface 500. Figure 7 FIG. 2 shows the leakage of the lubricating medium in one overhaul cycle. In the middle of the second month, the monitoring system sends a warning signal that the lubricating medium leakage of the target part is slight, that is, M max ≤M x <M1. At this time, no maintenance measures are taken, and the observation of the lubricating medium leakage is continued. Until the beginning of the fourth month, the lubricating medium leakage is normal, the lubricating medium leakage speed is small, and the lubricating medium leakage amount slowly increases. However, in the middle of the fourth month, the monitoring system reports that the lubricating medium needs to be added to the target part and sends an addition signal of the lubricating medium, that is, M1≤M x <M2. This requires that the target part be added with an appropriate amount of lubricating medium as soon as possible, and the recommended addition amount is h×M2. When the lubricating medium is added to the target part in one overhaul cycle, the lubricating medium leakage amount can be continued to be accumulated after the addition. At the end of the fifth month, the lubricating medium leakage situation changes greatly compared with before, and it can be obviously seen that the lubricating medium leakage speed increases, so the monitoring system reports that the lubricating medium leakage is serious and sends a shutdown and troubleshooting signal, that is, M2≤M x , which requires that the unit be immediately checked to find out the specific reason for the excessive lubricating medium leakage.

[0109] Please refer to Figure 8 and Figure 9 , Figure 8 for a structural schematic view of a monitoring system 10 provided by the second aspect embodiment of the present application. Figure 9 is a structural schematic view of a support 100 of the monitoring system 10 provided by the second aspect embodiment of the present application.

[0110] The embodiment of the second aspect of the application also provides a monitoring system 10 for monitoring the leakage amount of lubricating medium of a target part, for example, a main shaft bearing 40 of a wind turbine generator set. The monitoring system 10 provided by the embodiment of the second aspect of the application comprises a support 100 having a support base plate 110 and a grease receiving container 200 arranged on the support base plate 110, a controller 300 for obtaining the actual leakage amount M of the leaked lubricating medium in the grease receiving container 200 through the weigher 120 x , and for determining whether the leakage of the lubricating medium of the target part is abnormal according to the actual leakage amount M x .

[0111] In the monitoring system 10 provided by the embodiment of the second aspect of the application, the monitoring system 10 comprises a support, a grease receiving container 200 and a controller 300. The support base plate 110 of the support 100 is provided with a weigher 120, and the grease receiving container 200 is arranged on the support base plate 110, so that the weigher 120 can weigh the grease receiving container 200. When the grease receiving container 200 receives the leaked lubricating medium, the weigher 120 weighs the grease receiving container 200, so as to obtain the leakage amount of the lubricating medium. The controller 300 obtains the actual leakage amount M of the leaked lubricating medium in the grease receiving container 200 through the weigher 120 x , and determines whether the leakage of the lubricating medium of the target part is abnormal according to the actual leakage amount M x . The monitoring system 10 of the application can obtain the actual leakage amount M of the lubricating medium x , and determine whether the leakage of the lubricating medium of the target part is abnormal according to the actual leakage amount M x , so that the determination result is more accurate. Therefore, the monitoring system 10 of the embodiment of the application can accurately determine the leakage condition of the lubricating medium, so as to facilitate timely supplement of the lubricating medium and improve the lubrication problem of the target part.

[0112] The support 100 can be in the form of a plate.

[0113] Please refer to Figure 10 , Figure 10 which is a top view of the support 100 of the monitoring system 10 provided by the embodiment of the second aspect of the application.

[0114] The number of the weighers 120 can be various, for example, as shown in Figure 10 , the number of the weighers 120 can be four, and the four weighers 120 can obtain more accurate leakage amount information of the lubricating medium.

[0115] Please refer to Figure 11 ,Figure 11 is a structural diagram of a support 100 and a grease container 200 of a monitoring system 10 according to an embodiment of the second aspect of the present application

[0116] In some alternative embodiments, the support 100 further comprises a plurality of side walls 130 connected to the periphery of the support bottom plate 110, and a containing space enclosed by the plurality of side walls 130 and the support bottom plate 110, wherein the grease container 200 is located in the containing space, and wherein at least one of the side walls 130 is provided with a buffer pad 140 on the surface thereof facing the containing space.

[0117] In these alternative embodiments, the support 100 is provided with a containing space enclosed by the side walls 130 and the support plate, and the grease container 200 is located in the containing space. The plurality of side walls 130 can provide the grease container 200 with a limit in different directions, thereby ensuring the stability of the relative position between the grease container 200 and the target part. The surface of the side wall 130 facing the containing space is provided with a buffer pad 140, so as to avoid the side wall 130 from knocking against the grease container 200 and to slow down the vibration of the grease container 200.

[0118] Optionally, the support 100 is further provided with a connecting component 150, which is used to fix the support 100 at a predetermined position. The connecting component 150 is, for example, provided on the side wall 130.

[0119] Please refer to Figure 12 , Figure 12 is a structural diagram of a controller 300 of a monitoring system 10 according to an embodiment of the second aspect of the present application.

[0120] As shown in Figure 12 , in some alternative embodiments, the controller 300 comprises an information acquisition unit 310 configured to acquire a lubricating medium injection amount M j of the target part, and determine a lubricating medium leakage threshold value M j according to the lubricating medium injection amount M j , wherein 0 < k ≤ 1. max The controller 300 further comprises a determination unit 320 configured to determine that an abnormality occurs in the lubricating medium leakage of the target part when the actual leakage amount M x is greater than or equal to the lubricating medium leakage threshold value M max .

[0121] In these alternative embodiments, the information acquisition unit 310 is configured to acquire the lubricating medium injection amount M j , and then confirm the lubricating medium leakage threshold value M max through step S03. Then the determination unit 320 compares the actual leakage amount M x with the leakage threshold value M max, to determine whether the lubricating medium of the target part is abnormal, which can further improve the accuracy of the judgment result. The method for obtaining the value of k is as described above and will not be elaborated here.

[0122] In some optional embodiments, the determination unit 320 is configured to, when M max ≤M x <M1, determine that the leakage phenomenon is slight and issue a warning signal; when M1≤M x <M2, determine that lubricating medium needs to be replenished and issue a signal for replenishing the lubricating medium; when M2≤M x ≤M max <M1<M2.

[0123] In these optional embodiments, the determination unit 320 of the controller 300 can issue different alarm signals according to different actual leakage amounts M x . When M max ≤M x <M1, it indicates that the actual leakage amount of the lubricating medium of the current target part is slight. The determination unit determines that not taking maintenance measures temporarily will not affect the normal operation of the target part, but it is necessary to closely track the grease leakage situation of the target part in the later stage to timely detect the shortage of the lubricating medium. When M1≤M x <M2, it indicates that the actual leakage amount of the lubricating medium of the current target part is relatively large. The determination unit determines that the leakage of the lubricating medium may affect the normal operation of the target part, and the lubricating medium should be replenished in time to avoid the leakage of the lubricating medium affecting the normal operation of the target part. When M2≤M x ≤M x , it indicates that the current leakage of the lubricating medium has already or seriously affected the normal operation of the target part. The determination unit determines that it is necessary to stop the machine for inspection in time. Therefore, in the embodiments of the present invention, the determination unit issues corresponding signals according to different actual leakage amounts M x ≤M x

[0124] max <M2, determine that the replenishment amount of the lubricating medium to be replenished is h×M2, where h≥1. According to the embodiments of the present invention, a sufficient amount of lubricating medium can be replenished.

[0125] In some optional embodiments, the controller 300 further includes: a first acquisition unit 330, configured to acquire the first time when the grease receiving container 200 last injected the lubricating medium into the target part before starting to receive the leakage of the lubricating medium; a second acquisition unit 340, configured to acquire that the actual leakage amount Mx of the lubricating medium is greater than the lubricating medium leakage threshold M maxa second time; a judging unit 350, configured to determine that the target part is not sealed when a time difference between the first time and the second time is less than or equal to a first time threshold, and determine that the lubricating medium in the target part is softened when the time difference between the first time and the second time is greater than or equal to a second time threshold.

[0126] In some optional embodiments, the first obtaining unit 340 is configured to first determine an injection time of the lubricating medium, and then the second obtaining unit 350 is configured to determine a time when the actual leakage amount of the lubricating medium is greater than the leakage threshold, i.e., the actual leakage amount M x is greater than the leakage threshold M max When the time difference between the first time and the second time is less than or equal to the first time threshold, it indicates that the leakage amount of the lubricating medium exceeds the leakage threshold M max of the lubricating medium in a short time, and the judging unit 360 determines that the lubricating medium leaks at a relatively fast speed, and it is very likely that the target part is not sealed, which causes the lubricating medium to leak abnormally. When the time difference between the first time and the second time is greater than or equal to the second time threshold, it indicates that the leakage of the lubricating medium is abnormal after a relatively long time, and the judging unit determines that it is possible that the lubricating medium is softened after the target part is operated for a relatively long time, which causes the lubricating medium to be prone to leakage.

[0127] In some optional embodiments, please continue to refer to Figure 12 The controller 300 further includes a cleaning record unit 370, configured to accumulate the amounts of lubricating medium before and after the cleaning of the grease container 200. In a maintenance period, the grease container 200 can be cleaned, and when the grease container is cleaned, in order to avoid that the actual leakage amount of the lubricating medium is calculated from zero, the cleaning record unit 370 can be set, and the cleaning record unit 370 can accumulate the amounts of lubricating medium before and after the cleaning, so as to facilitate the user to better record the leakage amount of the lubricating medium in a maintenance period.

[0128] Please refer to Figure 14 , Figure 14 is a structural module schematic diagram of the controller 300 of the monitoring system 10 according to a second aspect of the present application.

[0129] In some optional embodiments, the monitoring system 10 further includes an input unit 380, configured to input historical lubricating medium leakage data, so that historical data or model data can be input into the monitoring system 10.

[0130] Optionally, the monitoring system 10 further includes a display unit 390, configured to display the leakage data.

[0131] Under normal conditions, the normal leakage process of the target part (e.g. the lubricating medium of the main shaft bearing 40) can be monitored as a reference standard for the analysis and trend prediction of the lubricating medium leakage. The historical data can be input into the monitoring system 10 through the input unit 380 and visualized by the display unit 390. The display unit 390 mainly visualizes the data and draws a curve of the lubricating medium leakage amount over time, facilitating data analysis.

[0132] The full-field unit is compared with the reference standard of the lubricating medium leakage of the main shaft bearing 40 at the same time to evaluate the lubricating medium leakage of the main shaft bearing 40 of each wind turbine and provide guidance for the preventive and predictive maintenance of the unit. For example, according to the reference standard, the cumulative leakage amount of the lubricating medium of the main shaft bearing 40 at each time point, the lubricating medium leakage speed and the remaining amount of the lubricating medium in the bearing can be predicted, so that the characteristics, rules and influencing factors of the whole process of the lubricating medium leakage of the main shaft bearing 40 are mastered, which serves as a standard for the trend prediction, fault early warning and problem analysis of the lubricating medium leakage of the main shaft bearing 40 and provides a reliable basis for formulating a detailed maintenance plan. In addition, the historical data can also be used to model the leakage of the lubricating medium.

[0133] Please refer to Figure 15 , Figure 15 which is a structural schematic diagram of a wind turbine generator set provided by an embodiment of the third aspect of the present application.

[0134] As Figure 15 shown, the embodiment of the third aspect of the present application further provides a wind turbine generator set, which comprises the monitoring system provided by any one of the embodiments of the second aspect and the host computer 20, the host computer 20 being connected to the controller 300 of the monitoring system and used to acquire the data of the controller 300. In the wind turbine generator set provided by the embodiment of the present application, the host computer 20 can provide the controller 300 with the lubricating medium leakage of the target part.

[0135] Optionally, the wind turbine generator set further comprises a central monitoring platform 30, the central monitoring platform 30 being connected to the host computer 20 and used to display and monitor the lubricating medium leakage in real time.

[0136] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A monitoring method for monitoring a lubricating medium leak in a wind turbine, characterized in that The monitoring method comprises: setting a grease receiving container at a lubricating medium leakage position of a target part to receive the leaked lubricating medium; determining an actual leakage amount M of the leakage lubrication medium from the received leakage lubrication medium x ; According to the actual leakage amount M x determining whether the lubricating medium leakage of the target part is abnormal; wherein, before the actual leakage amount M x The monitoring method further comprises, before the step of determining whether the lubrication medium leakage of the target part is abnormal, acquiring an injection amount M of lubricating medium of the target part j ; According to the injection amount M of the lubricating medium j Determining a lubricating medium leakage threshold value M max where M max = k x M j , 0 < k < 1 In the step of determining whether the lubricating medium leakage of the target part is abnormal according to the actual leakage amount M x In the step of determining whether the lubricating medium leakage of the target part is abnormal, the monitoring method further comprises: when M x is greater than or equal to M max , determining that the lubricating medium leakage of the target part is abnormal. In accordance with the actual leakage amount M x The step of determining whether the lubricating medium leakage of the target part is abnormal further comprises: determining a first time when the grease receiving container lastly receives the lubricating medium before the lubricating medium leakage; determining the actual lubricant leakage M x greater than the lubricant leakage threshold M max a second time; determining that the target part is not tightly sealed when a time difference between the first time and a second time is less than or equal to a first time threshold value; determining that the lubricating medium in the target part is softened when the time difference between the first time and the second time is greater than or equal to a second time threshold value.

2. The monitoring method of claim 1, wherein, acquiring an injection amount M of lubricating medium of the target part j determining, in the case where the lubricating medium container starts to receive the lubricating medium leakage, a quantity of lubricating medium injected last time to the target part as the injection amount M of lubricating medium of the target part j .

3. The monitoring method of claim 1, wherein, When M x greater than or equal to M max , the step of determining that the lubricating medium leakage of the target part is abnormal further comprises: When M max ≤ M x When M1, it is determined that the lubricating medium leakage phenomenon of the target part is slight and a pre-warning signal is issued. when M1≤M x <M2, it is determined that the target part needs to be supplemented with lubricating medium, and a lubricating medium supplement signal is sent out. When M2≤M x , it is determined that the lubricating medium leakage phenomenon of the target part is serious and a shutdown and troubleshooting signal is issued, where M max <M1<M2.

4. The monitoring method according to claim 3, characterized in that, When M x greater than or equal to M max , the step of determining that the lubricating medium leakage of the target part is abnormal further comprises: When M1≤M x When M2, the amount of the replenishment of the lubricating medium is determined as h x M2, where h≥1.

5. A monitoring system for monitoring the amount of leakage of a lubricating medium from a component in a wind power plant, characterized in that The monitoring system comprises: a support base having a support bottom plate and a scale arranged on the support bottom plate; a grease receiving container arranged on the support bottom plate, the grease receiving container being used to receive the leaked lubricating medium; a controller for obtaining an actual leakage amount M of the leaked lubricating medium in the grease container through the weigher x and for determining whether the lubricating medium leakage of the target part is abnormal according to the actual leakage amount M x and for determining whether the lubricating medium leakage of the target part is abnormal according to the actual leakage amount M wherein the controller further comprises: An information acquisition unit acquires the lubricant injection amount M of the target part j And according to the lubricant injection amount M j Determine k x M j As a lubricant leakage threshold M max ; determining unit configured to determine that the target part has an abnormal lubricating medium leakage when M x is greater than or equal to M max , where 0 < k ≤ 1. The controller further comprises: a first acquisition unit configured to acquire a first time when the grease receiving container lastly receives the lubricating medium before the lubricating medium leakage; The second acquisition unit is configured to acquire the actual leakage amount Mx of the lubricating medium, which is greater than the lubricating medium leakage threshold M max of the second time. a judgment unit configured to determine that the target part is not tightly sealed when a time difference between the first time and a second time is less than or equal to a first time threshold value, and determine that the lubricating medium in the target part is softened when the time difference between the first time and the second time is greater than or equal to a second time threshold value.

6. The monitoring system of claim 5, wherein, The support base further comprises a plurality of side walls connected to the periphery of the support bottom plate, and a containing space enclosed by the plurality of side walls and the support bottom plate, the grease receiving container being located in the containing space, wherein at least one of the side walls is provided with a buffer pad on the surface thereof facing the containing space.

7. The monitoring system of claim 5, wherein, The determination unit is further configured to determine that the leakage phenomenon of the target part is slight and issue a pre-warning signal when M max ≤ M x <M1, determine that the target part needs to be supplemented with lubricating medium and issue a lubricating medium supplement signal when M1≤ M x <M2, and determine that the leakage phenomenon is serious and issue a shutdown and troubleshooting signal when M2≤ M x , wherein M max <M1 < M2.

8. The monitoring system of claim 7, wherein, The controller further comprises a top-up quantity calculation unit for determining a top-up quantity h x M2, where h > 1, of the lubricating medium required for top-up when M1 < M2. x <M2.

9. The monitoring system of claim 5, wherein, The controller further comprises a cleaning record unit configured to accumulate the amount of lubricating medium before and after cleaning the grease receiving container.

10. The monitoring system of claim 5, wherein, Further comprising: an input unit configured to input historical lubricating medium leakage data; and / or a display unit configured to display the leakage data.

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