Lubricating oil distribution system and wind generating set

Abstract

The embodiment of the invention provides a lubricating oil distribution system and a wind generating set. The lubricating oil distribution system includes: an oil pump; the first pipeline is used for being connected between an oil outlet of the oil pump and an oil inlet of the gearbox; the second pipeline is used for being connected between the first pipeline and the main shaft bearing; the flow monitoring module is used for monitoring the flow of lubricating oil supplied to the main shaft bearing; the flow adjusting module can adjust the flow of lubricating oil supplied to the main shaft bearing through the second pipeline; and the first controller is in signal connection with the flow monitoring module and the flow adjusting module, and the first controller can receive the feedback data from the flow monitoring module and output a control signal to the flow adjusting module according to the feedback data so as to adjust the flow of the lubricating oil supplied to the main shaft bearing through the flow adjusting module. Reasonable distribution of lubricating oil is realized, so that the problems of service life reduction and even damage caused by insufficient lubrication of the gearbox and the main shaft bearing can be avoided, and the reliability is improved.

Description

Technical Field

[0001] The invention relates to the field of wind power generation equipment, and in particular to a lubricating oil distribution system and a wind power generator set. Background Art

[0002] With the use of medium-speed permanent magnet technology and the introduction of liquid lubricated bearing technology, gearboxes and spindle bearings use thin oil lubrication technology. So far, gearboxes and spindle bearings are lubricated by independent lubrication systems, which are complex in structure and increase costs. However, if you want to achieve the merger of function and structure through design, since the viscosity of the lubricating oil changes greatly with temperature, the internal lubricating oil circuit of the gearbox has many branches and the oil circuit length deviation is relatively large, while the internal oil circuit of the spindle bearing is relatively simple and has the same length, it is very difficult to reasonably distribute the lubricating oil of the gearbox and spindle bearing. If the lubricating oil distribution does not meet the needs of the gearbox and spindle bearing, it will lead to a reduction in the service life of the gearbox and spindle bearing, and poor lubrication in a short time may also easily lead to damage to the gearbox or spindle bearing. Summary of the invention

[0003] Therefore, an object of the present invention is to provide a lubricating oil distribution system and a wind turbine generator set, so as to at least solve the problem that the lubricating oil of the gear box and the main shaft bearing cannot be reasonably distributed.

[0004] A first aspect of the present invention provides a lubricating oil distribution system for a wind turbine generator set, wherein the wind turbine generator set includes a gearbox and a main shaft bearing, and the lubricating oil distribution system includes: an oil pump; a first pipeline for connecting between the oil outlet of the oil pump and the oil inlet of the gearbox; a second pipeline for connecting between the first pipeline and the main shaft bearing; a flow monitoring module for monitoring the flow of lubricating oil supplied to the main shaft bearing; a flow regulating module capable of regulating the flow of lubricating oil supplied to the main shaft bearing through the second pipeline; a first controller, which is signal-connected to the flow monitoring module and the flow regulating module, respectively, and the first controller can receive feedback data from the flow monitoring module, and output a control signal to the flow regulating module according to the feedback data, so as to regulate the flow of lubricating oil supplied to the main shaft bearing through the flow regulating module.

[0005] The lubricating oil distribution system provided by the embodiment of this aspect uses an oil pump to supply lubricating oil to the gear box through the first pipeline at the same time, and to supply lubricating oil to the main shaft bearing through the first pipeline and the second pipeline. Compared with the gear box and the main shaft bearing respectively using independent lubrication systems, the structure can be simplified, the number of oil pumps and pipelines can be reduced, the number of parts can be reduced, and the cost can be saved. In addition, a flow monitoring module is used to monitor the flow of lubricating oil supplied to the main shaft bearing, and a flow regulating module is configured to regulate the flow of lubricating oil supplied to the main shaft bearing by the second pipeline. When the flow monitoring module detects that the supply is too much or insufficient, the flow regulating module is controlled by the first controller to make corresponding adjustments, which is conducive to supplying lubricating oil that meets the demand to the main shaft bearing. When the oil pump supplies oil quantitatively, the oil pump pumps according to the lubricating oil flow required by the gear box and the main shaft bearing. After controlling the lubricating oil flowing to the main shaft bearing not to be too much or too little, the remaining lubricating oil flowing to the gear box can meet the lubrication demand of the gear box, thereby realizing the reasonable distribution of lubricating oil, thereby avoiding the problem of reduced life or even damage of the gear box and the main shaft bearing due to insufficient lubrication, and improving reliability.

[0006] Moreover, even if the machine works at different ambient temperatures, the viscosity of the lubricating oil varies due to the temperature. Even if the internal lubricating oil circuit of the gearbox has many branches and large length deviations, the internal oil circuit of the spindle bearing is usually simpler and has the same or similar lengths. By monitoring the lubricating oil flow rate and adjusting the lubricating oil supplied to the spindle bearing, the lubricating oil flow supplied to the spindle bearing can be timely detected and adjusted to meet the demand, and the lubricating oil flowing to the gearbox can meet the demand, thereby ensuring the lubrication effect. Moreover, since the internal oil circuit of the spindle bearing is relatively simple, it is convenient to install the flow monitoring module and the flow regulating module, and it is convenient to accurately control the flow of the lubricating oil supplied to the spindle bearing, thereby realizing the reasonable distribution of the lubricating oil of the gearbox and the spindle bearing.

[0007] A second aspect of the present invention provides a wind turbine generator set, which includes: an oil storage tank, a gear box, a main shaft bearing and a lubricating oil distribution system as described in the above embodiment, wherein an oil pump is connected to the oil storage tank, a first pipeline connects the oil outlet of the oil pump and the gear box, and a second pipeline connects the first pipeline and the main shaft bearing.

[0008] The wind turbine generator set provided by the embodiment of this aspect has the lubricating oil distribution system of the above embodiment, and thus has the beneficial effects of the above embodiment, which will not be described in detail here.

[0009] Additional aspects and / or advantages of the present general inventive concept will be set forth in part in the following description and in part will be obvious from the description, or may be learned through practice of the present general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other objects and features of the present invention will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0011] Figure 1 The assembly of the lubricating oil distribution system according to one embodiment of the present application is shown. Figure 1 ;

[0012] Figure 2 The assembly of the lubricating oil distribution system according to one embodiment of the present application is shown. Figure 2 ;

[0013] Figure 3 A schematic structural diagram of a lubricating oil distribution system according to an embodiment of the present application is shown;

[0014] Figure 4 A working principle diagram of a lubricating oil distribution system according to an embodiment of the present application is shown;

[0015] Figure 5 A flow chart of a control method for a lubricating oil distribution system according to an embodiment of the present application is shown.

[0016] Figures 1 to 5 Description of Figure Numbers:

[0017] 10 gearbox,

[0018] 20 spindle bearings, 210 front bearings, 220 rear bearings, 230 thrust bearings,

[0019] 30 oil pump,

[0020] 40 first pipeline,

[0021] 50 second pipeline, 510 main pipeline, 520 first branch, 521 first throttle valve, 530 second branch, 531 second throttle valve, 540 third branch, 541 third throttle valve,

[0022] 60 flow monitoring module, 610 first branch flow meter, 620 second branch flow meter, 630 third branch flow meter,

[0023] 70 flow control module, 710 two-way valve, 720 actuator,

[0024] 80 first controller,

[0025] 90 shell. DETAILED DESCRIPTION

[0026] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted.

[0027] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will be clear after understanding the disclosure of the present application.

[0028] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more.

[0029] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer, or first portion referred to in the examples may also be referred to as the second member, second component, second region, second layer, or second portion.

[0030] In the specification, when an element such as a layer, a region or a substrate is described as being “on”, “connected to” or “coupled to” another element, the element may be directly “on”, “connected to” or “coupled to” another element, or one or more other elements may be present therebetween. Conversely, when an element is described as being “directly on”, “directly connected to” or “directly coupled to” another element, there may be no other elements present therebetween.

[0031] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise", "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof. The term "plurality" represents any number of two and more than two.

[0032] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as those generally understood by ordinary technicians in the field to which the present invention belongs after understanding the present invention. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and the present invention, and should not be interpreted in an idealized or overly formal way.

[0033] like Figures 1 to 4 As shown, the first embodiment of the present invention provides a lubricating oil distribution system for a wind turbine generator set. Specifically, the wind turbine generator set includes a gearbox 10 and a main shaft bearing 20. The integrated lubricating oil distribution system realizes closed-loop control through a flow monitoring module 60, a flow regulating module 70 and a first controller 80, and can be diverted according to the flow distribution requirements of the gearbox 10 and the main shaft bearing 20 to meet the lubricating oil quantity of the gearbox 10 and the main shaft bearing 20, ensure the reliability of the operation of the gearbox 10 and the main shaft bearing 20, and improve the service life of the gearbox 10 and the main shaft bearing 20, so as to facilitate the gearbox 10 and the main shaft bearing 20 to meet the service life requirement of the wind turbine generator set of 25 years.

[0034] like Figures 1 to 4 As shown, the lubricating oil distribution system includes an oil pump 30, a first pipeline 40 and a second pipeline 50. The first pipeline 40 is used to connect between the oil outlet of the oil pump 30 and the oil inlet of the gear box 10, and the second pipeline 50 is used to connect between the first pipeline 40 and the main shaft bearing 20. The oil pump 30 is used to supply lubricating oil to the gear box 10 through the first pipeline 40, and to the main shaft bearing 20 through the first pipeline 40 and the second pipeline 50. Compared with the gear box 10 and the main shaft bearing 20 using independent lubrication systems respectively, the structure can be simplified, the number of oil pumps 30 and pipelines can be reduced, the number of parts can be reduced, and the cost can be saved.

[0035] like Figure 3 and Figure 4As shown, the lubricating oil distribution system further includes a flow monitoring module 60, a flow regulating module 70 and a first controller 80. The flow monitoring module 60 is used to monitor the flow of the lubricating oil supplied to the main shaft bearing 20, the flow regulating module 70 can regulate the flow of the lubricating oil supplied to the main shaft bearing 20 through the second pipeline 50, and the first controller 80 is respectively connected to the flow monitoring module 60 and the flow regulating module 70 by signal. The first controller 80 can receive feedback data from the flow monitoring module 60, and output a control signal to the flow regulating module 70 according to the feedback data, so as to regulate the flow of the lubricating oil supplied to the main shaft bearing 20 through the flow regulating module 70. The signal connection between the first controller 80 and the flow monitoring module 60 and the flow regulating module 70 can be achieved by wired or wireless means.

[0036] A flow monitoring module 60 is used to monitor the flow of lubricating oil supplied to the main shaft bearing 20, and a flow regulating module 70 is configured to regulate the flow of lubricating oil supplied from the second pipeline 50 to the main shaft bearing 20. When the flow monitoring module 60 detects that the supply is excessive or insufficient, the flow regulating module 70 is controlled by the first controller 80 to make corresponding adjustments, which is conducive to supplying the main shaft bearing 20 with lubricating oil that meets the demand. When the oil pump 30 supplies oil in a quantitative manner, the oil pump 30 pumps the lubricating oil according to the amount of lubricating oil required by the gear box 10 and the main shaft bearing 20. After controlling the lubricating oil flowing to the main shaft bearing 20 not to be excessive or insufficient, the remaining lubricating oil flowing to the gear box 10 can meet the lubrication demand of the gear box 10, thereby realizing the reasonable distribution and diversion of the lubricating oil, thereby avoiding the problem of reduced life or even damage of the gear box 10 and the main shaft bearing 20 due to insufficient lubrication, thereby improving reliability.

[0037] Moreover, even if the lubricating oil works at different ambient temperatures, the viscosity of the lubricating oil varies due to the different temperatures. Even if the lubricating oil circuit inside the gearbox 10 has many branches and a large length deviation, and the lubricating oil circuit inside the main shaft bearing 20 is usually relatively simple and has the same or similar length, the lubricating oil supplied to the main shaft bearing 20 can be adjusted by monitoring the lubricating oil flow rate, so that the lubricating oil flow supplied to the main shaft bearing 20 can be timely discovered and adjusted to meet the demand, and the lubricating oil flowing to the gearbox 10 can meet the demand, which can ensure the lubrication effect. Moreover, since the internal oil circuit of the main shaft bearing 20 is relatively simple, it is convenient to install the flow monitoring module 60 and the flow regulating module 70, and it is convenient to accurately control the flow of the lubricating oil supplied to the main shaft bearing 20, thereby realizing the reasonable distribution of the lubricating oil of the gearbox 10 and the main shaft bearing 20.

[0038] Furthermore, the oil pump 30 is a metering pump and can be designed according to the sum of the lubricating oil quantity required by the gearbox 10 and the lubricating oil quantity required by the main shaft bearing 20 , so that the lubricating oil pumped by the oil pump 30 can simultaneously meet the lubrication requirements of the gearbox 10 and the main shaft bearing 20 .

[0039] Furthermore, the main shaft bearing 20 includes a plurality of sub-bearings, and the lubricating oil distribution system can distribute lubricating oil to the plurality of sub-bearings at the same time.

[0040] Specifically, if Figure 3 As shown, when the main shaft bearing 20 is a rolling bearing, the main shaft bearing 20 may include three sub-bearings, namely a front bearing 210, a rear bearing 220 and a thrust bearing 230, and when the main shaft bearing 20 is a sliding bearing, the main shaft bearing 20 may include two sub-bearings, namely a front bearing 210 and a rear bearing 220.

[0041] Furthermore, the second pipeline 50 includes a main path 510 and a plurality of branches, the flow regulating module 70 is connected to the main path 510, one end of each branch is connected to the main path 510, and the other end is connected to a corresponding sub-bearing, and the flow regulating module 70 can regulate the flow of lubricating oil flowing out of the main path 510, thereby regulating the amount of lubricating oil supplied to the main shaft bearing 20 as a whole. Moreover, the design of the main path 510 and the branches in the second pipeline 50 simplifies the structure and saves costs.

[0042] As an example, the multiple branches are configured to supply lubricating oil to the multiple sub-bearings respectively according to a set ratio. For example, the inner diameter of the branch connected to the front bearing 210 and the rear bearing 220 is smaller than the inner diameter of the branch connected to the thrust bearing 230, so that the multiple branches supply lubricating oil to the front bearing 210, the rear bearing 220 and the thrust bearing 230 according to a ratio of 3:3:4.

[0043] As an example, the lubricating oil distribution system also includes a plurality of flow regulating valves, which are arranged one by one on a plurality of branches, and the flow regulating valves can adjust the flow of lubricating oil supplied from the branch to the corresponding sub-bearing. Here, the inner diameters of the plurality of branches can be made the same, and the flow of lubricating oil supplied can be adjusted by the flow regulating valve. The flow of lubricating oil supplied by the branch can meet the lubrication requirements of the corresponding sub-bearings, and the plurality of branches can supply lubricating oil to the front bearing 210, the rear bearing 220 and the thrust bearing 230 according to a set ratio. Moreover, the design of the flow regulating valve, in conjunction with the flow regulating module 70, not only realizes the control of the overall lubricating oil flow of the main shaft bearing 20, but also realizes the control of the lubricating oil flow of each sub-bearing, which is conducive to meeting the lubrication needs of each sub-bearing and improving the lubrication effect.

[0044] The flow control valve can be manually adjusted, such as a throttle valve. Figure 3 The first throttle valve 521, the second throttle valve 531 and the third throttle valve 541 are shown in FIG. The flow regulating valve can also be electrically regulated, for example, a proportional speed regulating valve.

[0045] Further, the flow monitoring module 60 includes a flow meter, and the first controller 80 is capable of receiving feedback data from the flow meter.

[0046] The flow meter comprises a plurality of branch flow meters, which are arranged on the plurality of branches in a one-to-one correspondence and are used to monitor the flow of the lubricating oil supplied to each of the sub-bearings.

[0047] Of course, the flow meter may also include a main flow meter (not shown in the figure), which is arranged on the main path 510 to monitor the flow of the lubricating oil supplied to the main shaft bearing 20 as a whole.

[0048] Furthermore, if Figure 3 and Figure 4 As shown, the flow regulating module 70 includes a two-way valve 710 and an actuator 720. The two-way valve 710 is arranged on the second pipeline 50, and the actuator 720 is used to adjust the valve port size of the two-way valve 710 under the control of the first controller 80. The actuator 720 can be connected to the two-way valve 710, or it can be not in contact with the two-way valve 710, and remotely drive the valve core of the two-way valve 710 to move, for example, drive the valve core of the two-way valve 710 to move by magnetic force.

[0049] As an example, the two-way valve 710 is a two-way ball valve, and the actuator 720 is an angle actuator.

[0050] Furthermore, if Figure 1 and Figure 2 As shown, the lubricating oil distribution system further includes a housing 90, a first pipeline 40 and a second pipeline 50 extend into the housing 90, a flow monitoring module 60 is disposed in the housing 90, and a two-way valve 710 is disposed in the housing 90. At least a portion of the first pipeline 40, the second pipeline 50, the flow monitoring module 60, and the flow regulating module 70 are integrated in the housing 90, which has a compact structure and can reduce the influence of the outside on the internal components of the housing 90.

[0051] As an example, multiple branch flow meters are located in the housing 90 , the two-way valve 710 is located in the housing 90 , and the actuator 720 is disposed in the housing 90 or the actuator 720 is disposed on the housing 90 and extends into the housing 90 to connect with the two-way valve 710 .

[0052] In a specific embodiment, Figure 3 and Figure 4As shown, the main shaft bearing 20 includes a front bearing 210, a rear bearing 220 and a thrust bearing 230. The multiple branches include a first branch 520, a second branch 530 and a third branch 540, the first branch 520 is used to supply lubricating oil to the front bearing 210, the second branch 530 is used to supply lubricating oil to the rear bearing 220, and the third branch 540 is used to supply lubricating oil to the thrust bearing 230. The flow meter includes a first branch flow meter 610, a second branch flow meter 620 and a third branch flow meter 630, which are respectively arranged on the first branch 520, the second branch 530 and the third branch 540. The lubricating oil distribution system also includes a first throttle valve 521, a second throttle valve 531 and a third throttle valve 541, which are respectively arranged on the first branch 520, the second branch 530 and the third branch 540. Of course, the three throttle valves can also be replaced by a proportional speed regulating valve to achieve electronic control adjustment.

[0053] The following is a detailed introduction to the specific allocation method of the allocation system:

[0054] In the first embodiment, the first controller 80 can output a control signal to the flow regulating module 70 according to feedback data received from at least one of the plurality of branch flow meters.

[0055] Specifically, there are multiple sub-bearings, branches, and branch flowmeters, which are respectively set one by one, and the lubrication flow supplied to the multiple sub-bearings meets the predetermined ratio. The first controller 80 can output a control signal to the flow regulation module 70 according to the feedback data received from any one of the multiple branch flowmeters.

[0056] When the first controller 80 receives feedback data from any one of the multiple branch flow meters that is greater than the first upper threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module 70, so that the flow regulating module 70 reduces the flow of lubricating oil supplied to the main shaft bearing 20. On the contrary, when the first controller 80 receives feedback data from any one of the multiple branch flow meters that is less than the first lower threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module 70, so that the flow regulating module 70 increases the flow of lubricating oil supplied from the second pipeline 50 to the main shaft bearing 20.

[0057] Since the lubricating flow supplied to the multiple sub-bearings is supplied in a predetermined ratio to meet the lubricating oil flow required by each sub-bearing, the lubricating oil flow of the main shaft bearing 20 as a whole can be reflected according to the flow supplied by any branch. For example, the lubricating oil flow required by the front bearing 210 is 9L / min, the lubricating oil flow required by the rear bearing 220 is 9L / min, and the lubricating oil flow required by the thrust bearing 230 is 9L / min. Then, the multiple branches supply lubricating oil to the front bearing 210, the rear bearing 220 and the thrust bearing 230 in a ratio of 3:3:4. If the flow rate monitored by the branch flow meter corresponding to the front bearing 210 is 8L / min, which is less than the first upper limit threshold of 8.5L / min, it means that the lubricating oil supplied to the rear bearing 220 is insufficient, and the lubricating oil supplied to the thrust bearing 230 is also insufficient, so that the first controller 80 can send a control signal to the flow regulating module 70 to enable the flow regulating module 70 to increase the lubricating oil flow supplied by the second pipeline 50 to the main shaft bearing 20 as a whole. Therefore, when the feedback data of any branch flow meter is greater than the first upper threshold required by the corresponding sub-bearing, the first controller 80 adjusts the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole to be reduced, and when the feedback data of any branch flow meter is less than the first lower threshold required by the corresponding sub-bearing, the first controller 80 adjusts the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole to be increased, so that the flow rate supplied to the main shaft bearing 20 can be accurately controlled to meet the lubrication needs of the main shaft bearing 20. When the total amount of lubrication pumped by the distribution system is constant, the amount of lubrication distributed to the main shaft bearing 20 is the design demand, and the remaining flow is the required lubrication amount of the gear box 10, the intelligent distribution system can realize the lubricating oil distribution function under any temperature conditions without human operation.

[0058] In a specific application, the first controller 80 may only receive feedback data from one branch flow meter, and output a control signal to the flow regulating module 70 accordingly.

[0059] As an example, in the case where the main shaft bearing 20 includes a front bearing 210, a rear bearing 220 and a thrust bearing 230, and the flow regulating module 70 includes a two-way ball valve and an angle actuator, the control method is as follows: Figure 3 and Figure 4As shown, when the flow of the front bearing 210 is lower than the first lower threshold, the branch flow meter relative to the front bearing 210 feedbacks a signal to the first controller 80, such as a servo controller, and the first controller 80 sends a control signal to the angle actuator to increase the opening of the two-way ball valve, so that the lubricating oil flow to the front bearing 210 meets the requirements of the front bearing 210, and the lubricating oil flow to the rear bearing 220 and the thrust bearing 230 also meets the requirements. On the contrary, when the flow of the front bearing 210 is higher than the first upper threshold, the branch flow meter relative to the front bearing 210 feedbacks a signal to the first controller 80, and the first controller 80 sends a control signal to the angle actuator to reduce the opening of the two-way ball valve, so that the lubricating oil flow to the front bearing 210 meets the requirements of the front bearing 210, and the lubricating oil flow to the rear bearing 220 and the thrust bearing 230 also meets the requirements. The first controller 80 does not need to perform control based on the feedback data of the branch flow meter relative to the rear bearing 220 and the thrust bearing 230, and the operation and calculation are simple.

[0060] Furthermore, each time the first controller 80 outputs a control signal to the flow regulating module 70, it must wait at least a first set time before it can output again. This provides time for the lubricating oil to flow smoothly, so that the flow meter can stably detect the flow rate. It can also avoid frequent manipulation that affects the stable supply of lubricating oil to the gear box 10.

[0061] Furthermore, in the case where the lubricating oil distribution system includes a plurality of flow regulating valves, the lubricating oil distribution system may further include a second controller (not shown in the figure), the second controller is respectively connected to the plurality of flow regulating valves and the plurality of branch flow meters by signal, the second controller is capable of receiving feedback data from any one of the plurality of branch flow meters, and outputting a control signal to the corresponding flow regulating valve according to the feedback data, so that the flow regulating valve automatically adjusts the flow of lubricating oil supplied to the corresponding sub-bearing. The second controller is respectively connected to the plurality of flow regulating valves and the plurality of branch flow meters by signal, which may be achieved by wired or wireless means.

[0062] In addition to the first controller 80 being able to control the flow regulating module 70 to adjust the lubricating oil flow supplied to the main shaft bearing 20 as a whole according to the feedback data of any branch flow meter, the second controller can also control the lubricating oil flow supplied by the branch to the corresponding sub-bearing according to the feedback data of any branch flow meter. In addition to ensuring that the overall lubricating oil amount of the main shaft bearing 20 meets the requirements, the lubricating oil flow of each sub-bearing of the main shaft bearing 20 can also meet the requirements, which is beneficial to ensure the lubrication effect of each sub-bearing.

[0063] Here, the first controller 80 and the second controller may be the same controller, or the first controller 80 and the second controller may be independently configured.

[0064] As an example, when the second controller receives feedback data from any branch flow meter that is greater than the second upper threshold required by the corresponding sub-bearing, the second controller outputs a control signal to the flow control valve on the same branch to make the flow control valve reduce the flow of lubricating oil supplied to the corresponding sub-bearing, and the second upper threshold is less than the first upper threshold. Conversely, when the second controller receives feedback data from any branch flow meter that is less than the second lower threshold required by the corresponding sub-bearing, the second controller outputs a control signal to the flow control valve on the same branch to make the flow control valve increase the flow of lubricating oil supplied to the corresponding sub-bearing, and the second lower threshold is greater than the first lower threshold. In this way, when the feedback data from the branch flow meter is not much different from the lubricating oil flow required by the relative sub-bearing, the flow control valve is used to slightly adjust the supply flow of the branch. In the case where the feedback data from the branch flow meter is significantly different from the lubricating oil flow required by the relative sub-bearing, the flow of lubricating oil supplied to the main shaft bearing 20 as a whole is directly adjusted. Accurate distribution of lubricating oil is achieved to ensure the lubrication effect of each sub-bearing and the gearbox 10.

[0065] Among them, when the second controller receives feedback data from a branch flow meter that is less than the second lower limit threshold required by the corresponding sub-bearing, it can only output a control signal to the flow control valve on the same branch, and the flow control valves on other branches remain unchanged, completing one adjustment. Conversely, when the second controller receives feedback data from a branch flow meter that is greater than the second upper limit threshold required by the corresponding sub-bearing, it can only output a control signal to the flow control valve on the same branch, and the flow control valves on other branches remain unchanged, completing one adjustment. Only the flow control valve on the branch where the sub-bearing with a small flow deviation is located can be slightly adjusted, which is easy to operate and has a small impact.

[0066] Of course, the second controller can output a control signal to the flow regulating valve on the same branch so that the flow regulating valve can reduce the flow of lubricating oil supplied to the corresponding sub-bearing, and can also output a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves can adaptively increase the flow of lubricating oil supplied to the corresponding sub-bearing to complete a regulation. Conversely, the second controller can output a control signal to the flow regulating valve on the same branch so that the flow regulating valve can increase the flow of lubricating oil supplied to the corresponding sub-bearing, and can also output a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves can adaptively reduce the flow of lubricating oil supplied to the corresponding sub-bearing to complete a regulation. When the total amount of lubricating oil pumped to the main shaft bearing 20 is constant, such an operation can more evenly adjust the lubricating oil supply to multiple sub-bearings and balance the oil pressure.

[0067] In addition, after the second controller completes each adjustment and outputs a control signal to at least one of the multiple flow control valves, it must wait at least a second set time before it can adjust again. This is beneficial for accurately monitoring the flow rate after the flow of the lubricating oil becomes smooth, and then adjusting, ensuring the accuracy of the adjustment, and also avoiding frequent adjustments that cause unstable lubricating oil flow, thereby affecting the lubrication effect.

[0068] Embodiment 2:

[0069] There are multiple sub-bearings, branches, and branch flowmeters, which are arranged in one-to-one correspondence.

[0070] When the first controller 80 receives feedback data from each branch flow meter that is greater than the first upper threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module 70 so that the flow regulating module 70 reduces the flow of lubricating oil supplied to the main shaft bearing 20. On the contrary, when the first controller 80 receives feedback data from each branch flow meter that is less than the first lower threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module 70 so that the flow regulating module 70 increases the flow of lubricating oil supplied to the main shaft bearing 20.

[0071] Compared with the above-mentioned embodiment 1, when the lubricating oil flow rate of each sub-bearing does not meet the demand, the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole is adjusted. The operation is simple, the number of adjustments can be reduced, the control is convenient, and the lubricating oil flow rate supplied to the gear box 10 will not be frequently affected, thereby ensuring the lubrication effect of the gear box 10.

[0072] The first upper threshold values ​​required by all sub-bearings may be the same or different, and the first lower threshold values ​​required by all sub-bearings may be the same or different, which may be determined according to the specific needs of each sub-bearing.

[0073] After the first controller 80 outputs a control signal to the flow regulating module 70 each time, it must wait for at least the first set time before it can output again. This is beneficial for making the flow of the lubricating oil tend to be smooth and then accurately monitoring the flow before adjusting, ensuring the accuracy of the adjustment, and also avoiding frequent adjustments that cause unstable lubricating oil flow, thereby affecting the lubrication effect.

[0074] Furthermore, the lubricating oil distribution system also includes a plurality of flow regulating valves, which are arranged one by one on a plurality of branches, and the flow regulating valves can adjust the flow of lubricating oil supplied from the branch to the corresponding sub-bearing. The design of the flow regulating valve can be used to independently adjust the flow of lubricating oil supplied by the branch or mutually adjust between the plurality of branches when the flow of lubricating oil of the individual sub-bearing does not meet the needs. On the one hand, the accurate distribution of lubricating oil can be achieved to ensure the lubrication effect of each sub-bearing. On the other hand, when the flow of lubricating oil supplied to the main shaft bearing 20 as a whole meets the needs and remains unchanged, the branch supply can be independently adjusted without affecting the flow of lubricating oil supplied to the gear box 10, and the influence on the lubrication of the gear box 10 can be avoided.

[0075] The flow control valve can be adjusted manually or electrically. When the flow control valve is electrically adjusted, the first controller 80 is connected to the plurality of flow control valves and the plurality of branch flow meters respectively by signal. The first controller 80 can receive feedback data from any one of the plurality of branch flow meters and output a control signal to the corresponding flow control valve according to the feedback data, so that the flow control valve automatically adjusts the flow of lubricating oil supplied to the corresponding sub-bearing.

[0076] As an example, when the first controller 80 receives feedback data from at least one branch flow meter between the first upper threshold and the first lower threshold required by the corresponding sub-bearing; when the feedback data from any other branch flow meter is greater than the first upper threshold required by the corresponding sub-bearing, the first controller 80 outputs a control signal to the flow control valve on the same branch to make the flow control valve reduce the flow of lubricating oil supplied to the corresponding sub-bearing, and vice versa, when the feedback data from any other branch flow meter is less than the first lower threshold required by the corresponding sub-bearing, the first controller 80 outputs a control signal to the flow control valve on the same branch to make the flow control valve increase the flow of lubricating oil supplied to the corresponding sub-bearing. As long as the lubricating oil supply of not all branches does not meet the requirements, only the flow supply of the branches that do not meet the requirements can be adjusted, which is convenient for operation.

[0077] Among them, when the first controller 80 receives feedback data from a branch flow meter that is less than the second lower threshold required by the corresponding sub-bearing, it can only output a control signal to the flow control valve on the same branch, and the flow control valves on other branches remain unchanged, completing one adjustment. Conversely, when the first controller 80 receives feedback data from a branch flow meter that is greater than the second upper threshold required by the corresponding sub-bearing, it can also only output a control signal to the flow control valve on the same branch, and the flow control valves on other branches remain unchanged, completing one adjustment. Only the flow control valve on the branch where the sub-bearing with a small flow deviation is located can be slightly adjusted, which is easy to operate and has a small impact.

[0078] Of course, when the first controller 80 outputs a control signal to the flow regulating valve on the same branch so that the flow regulating valve adjusts the lubricating oil flow supplied to the corresponding sub-bearing, it can also output a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves can adaptively increase the lubricating oil flow supplied to the corresponding sub-bearing to complete a regulation. Conversely, when the first controller 80 outputs a control signal to the flow regulating valve on the same branch so that the flow regulating valve adjusts the lubricating oil flow supplied to the corresponding sub-bearing, it can also output a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves can adaptively reduce the lubricating oil flow supplied to the corresponding sub-bearing to complete a regulation. When the total amount of lubricating oil pumped to the main shaft bearing 20 is constant, such an operation can more evenly adjust the lubricating oil supply of multiple sub-bearings and balance the oil pressure.

[0079] In addition, after the first controller 80 completes each adjustment and outputs a control signal to at least one of the multiple flow control valves, it must wait at least a first set time before it can be adjusted again. This is beneficial for accurately monitoring the flow rate after the flow of the lubricating oil becomes smooth, and then adjusting, ensuring the accuracy of the adjustment, and also avoiding frequent adjustments that cause unstable lubricating oil flow, thereby affecting the lubrication effect.

[0080] Embodiment three:

[0081] In the case where the flow meter includes a main flow meter, the first controller 80 can output a control signal to the flow regulating module 70 according to the feedback data received from the main flow meter. The main flow meter is used to monitor the lubricating oil flow supplied to the main shaft bearing 20 in real time on the main road 510, and the flow regulating module 70 is controlled to adjust accordingly, so that the amount of lubricating oil supplied to the main shaft bearing 20 as a whole meets the design requirements, so that the remaining lubricating oil flowing to the gear box 10 also meets the lubrication requirements of the gear box 10, and the lubrication effect is guaranteed without being affected by the change in the viscosity of the lubricating oil caused by the temperature change.

[0082] In order to improve the lubrication effect of the main shaft bearing 20, the flow meter further includes a plurality of branch flow meters, which are arranged one by one on the plurality of branches to monitor the flow rate of the lubricating oil supplied to each sub-bearing. The lubricating oil distribution system also includes a plurality of flow regulating valves, which are arranged one by one on the plurality of branches to regulate the flow rate of the lubricating oil supplied from the branch to the corresponding sub-bearing.

[0083] The design of the branch flow meter and the flow regulating valve can use the flow regulating valve to independently adjust the lubricating oil flow supplied by the branch or to mutually adjust between multiple branches when the lubricating oil flow of individual sub-bearings does not meet the needs. On the one hand, it can achieve accurate distribution of the lubricating oil to ensure the lubrication effect of each sub-bearing. On the other hand, when the overall lubricating oil flow supplied to the main shaft bearing 20 meets the requirements and remains unchanged, the branch supply can be independently adjusted without affecting the lubricating oil flow supplied to the gear box 10, thereby avoiding affecting the lubrication of the gear box 10.

[0084] The flow regulating valve can be adjusted manually or electrically. In the case where the flow regulating valve is electrically adjusted, the lubricating oil distribution system can further include a second controller, which is respectively connected to the plurality of flow regulating valves and the plurality of branch flow meters by signal. The second controller can receive feedback data from any one of the plurality of branch flow meters, and output a control signal to the corresponding flow regulating valve according to the feedback data, so that the flow regulating valve automatically adjusts the flow of lubricating oil supplied to the corresponding sub-bearing.

[0085] Here, the first controller 80 and the second controller may be the same controller, or the first controller 80 and the second controller may be independently configured.

[0086] As an example, when the first controller 80 receives feedback data from the main flow meter that is greater than the third upper threshold, it outputs a control signal to the flow regulating module 70, so that the flow regulating module 70 reduces the flow of lubricating oil supplied to the main shaft bearing 20. On the contrary, when the first controller 80 receives feedback data from the main flow meter that is less than the third lower threshold, it outputs a control signal to the flow regulating module 70, so that the flow regulating module 70 increases the flow of lubricating oil supplied to the main shaft bearing 20.

[0087] When the feedback data received from any branch flow meter is greater than the fourth upper threshold of the corresponding sub-bearing, the second controller sends a control signal to the flow control valve to make the flow control valve reduce the flow of lubricating oil supplied to the corresponding sub-bearing. Conversely, when the feedback data received from any branch flow meter is less than the fourth lower threshold of the corresponding sub-bearing, the second controller sends a control signal to the flow control valve to make the flow control valve increase the flow of lubricating oil supplied to the corresponding sub-bearing.

[0088] The sum of the fourth upper thresholds required for all sub-bearings is greater than the third upper threshold, and the sum of the fourth lower thresholds required for all sub-bearings is less than the third lower threshold.

[0089] The main flow meter is used to monitor the lubricating oil flow supplied from the main line 510 to the main shaft bearing 20 as a whole, and the flow regulating module 70 is used to control the flow of the main line 510 between the third upper threshold and the third lower threshold, and the flow of the main line 510 is strictly controlled to ensure that the lubricating oil that meets the demand is output to the main shaft bearing 20, and the gearbox 10 has the lubricating oil that meets the demand. In the case where the lubricating oil supplied to the main shaft bearing 20 as a whole meets the demand, if the lubricating oil supply of individual branches has a large deviation and exceeds the setting range required by the corresponding sub-bearing by a large margin, outside the fourth upper threshold and the fourth lower threshold, the solution of independently adjusting the lubricating oil supply of the branches can be used to perform internal adjustments between the branches, thereby avoiding affecting the lubricating oil flow supply of the gearbox 10.

[0090] Among them, when the second controller receives feedback data from a branch flow meter that is less than the fourth lower threshold required by the corresponding sub-bearing, it can only output a control signal to the flow control valve on the same branch, and the flow control valves on other branches remain unchanged, completing one adjustment. Conversely, when the second controller receives feedback data from a branch flow meter that is greater than the fourth upper threshold required by the corresponding sub-bearing, it can only output a control signal to the flow control valve on the same branch, and the flow control valves on other branches remain unchanged, completing one adjustment. Only the flow control valve on the branch where the sub-bearing with a small flow deviation is located can be slightly adjusted, which is easy to operate and has a small impact.

[0091] Of course, while the second controller outputs a control signal to the flow regulating valve on the same branch so that the flow regulating valve adjusts the lubricating oil flow rate supplied to the corresponding sub-bearing, it can also output a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves can adaptively increase the lubricating oil flow rate supplied to the corresponding sub-bearing, thereby completing a regulation. Conversely, while the second controller outputs a control signal to the flow regulating valve on the same branch so that the flow regulating valve adjusts the lubricating oil flow rate supplied to the corresponding sub-bearing, it can also output a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves can adaptively reduce the lubricating oil flow rate supplied to the corresponding sub-bearing, thereby completing a regulation. When the total amount of lubricating oil pumped to the main shaft bearing 20 is constant, such an operation can more evenly adjust the lubricating oil supply to multiple sub-bearings and balance the oil pressure.

[0092] In addition, after the second controller completes each adjustment and outputs a control signal to at least one of the multiple flow control valves, it must wait at least a first set time before it can adjust again. This is beneficial for accurately monitoring the flow rate after the flow of the lubricating oil becomes smooth, and then adjusting, ensuring the accuracy of the adjustment, and also avoiding frequent adjustments that cause unstable lubricating oil flow, thereby affecting the lubrication effect.

[0093] The second aspect of the present invention provides a wind turbine generator set, which includes: an oil storage tank, a gear box 10, a main shaft bearing 20 and a lubricating oil distribution system as in any one of the above embodiments, an oil pump 30 is connected to the oil storage tank, a first pipeline 40 connects the oil outlet of the oil pump 30 and the gear box 10, and a second pipeline 50 connects the first pipeline 40 and the main shaft bearing 20. The wind turbine generator set provided by the embodiment of this aspect has the lubricating oil distribution system of any one of the above embodiments, and thus has the beneficial effects of any one of the above embodiments, which will not be described one by one here.

[0094] A third aspect of the present invention provides a method for controlling a lubricating oil distribution system.

[0095] In a first specific embodiment, the method comprises the following steps:

[0096] Pumping lubricating oil to the gear box 10 and the main shaft bearing 20 at the same time;

[0097] The lubricating oil flow rate of the main shaft bearing 20 is obtained in real time, the lubricating oil flow rate supplied to the main shaft bearing 20 is adjusted according to the obtained lubricating oil flow rate, and the remaining lubricating oil is pumped 30 to the gear box 10 .

[0098] Among them, the steps of acquiring the lubricating oil flow rate of the main shaft bearing 20 in real time and adjusting the lubricating oil flow rate supplied to the main shaft bearing 20 according to the acquired lubricating oil flow rate include: acquiring the lubricating oil flow rate of each sub-bearing in the main shaft bearing 20 in real time; when any of the acquired lubricating oil flow rates is greater than the first upper limit threshold value required by the corresponding sub-bearing, reducing the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole; when any of the acquired lubricating oil flow rates is less than the first lower limit threshold value required by the corresponding sub-bearing, increasing the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole; wherein the first upper limit threshold value required by all sub-bearings is the same or different, and the first lower limit threshold value required by all sub-bearings is the same or different.

[0099] Reference here Figure 5 , since the lubricating flow supplied to multiple sub-bearings is supplied in a predetermined ratio to meet the lubricating oil flow required by each sub-bearing. Therefore, the lubricating oil flow of the main shaft bearing 20 as a whole can be reflected according to the flow supplied by any branch. Therefore, the lubricating oil amount of only one sub-bearing can be obtained. When the lubricating oil amount is greater than the first upper limit threshold required by the corresponding sub-bearing, the lubricating oil flow supplied to the main shaft bearing 20 as a whole is reduced. When the lubricating oil amount is less than the first lower limit threshold required by the corresponding sub-bearing, the lubricating oil flow supplied to the main shaft bearing 20 as a whole is increased. The lubricating oil supply to the main shaft bearing 20 as a whole meets the demand, and the lubricating oil supplied to each sub-bearing also meets the demand.

[0100] In addition, when the obtained lubricating oil flow rate is greater than the second upper limit threshold required by the corresponding sub-bearing, the lubricating oil flow rate supplied to the corresponding sub-bearing is reduced, and the second upper limit threshold is less than the first upper limit threshold; when the obtained lubricating oil flow rate is less than the second lower limit threshold required by the corresponding sub-bearing, the lubricating oil flow rate supplied to the corresponding sub-bearing is increased, and the second lower limit threshold is greater than the first lower limit threshold.

[0101] In addition, after the step of reducing the lubricating oil flow rate supplied to the corresponding sub-bearing, the step also includes adaptively increasing the lubricating oil flow rate supplied to the remaining sub-bearings to complete an adjustment; after the step of increasing the lubricating oil flow rate supplied to the corresponding sub-bearings, the step also includes adaptively reducing the lubricating oil flow rate supplied to the remaining sub-bearings to complete an adjustment; wherein, after each adjustment is completed, at least a second set time must be allowed to elapse before another adjustment can be made.

[0102] In a second specific embodiment, the method comprises the following steps:

[0103] Pumping lubricating oil to the gear box 10 and the main shaft bearing 20 at the same time;

[0104] The lubricating oil flow rate of the main shaft bearing 20 is obtained in real time, the lubricating oil flow rate supplied to the main shaft bearing 20 is adjusted according to the obtained lubricating oil flow rate, and the remaining lubricating oil is pumped 30 to the gear box 10 .

[0105] Among them, the steps of acquiring the lubricating oil flow rate of the main shaft bearing 20 in real time and adjusting the lubricating oil flow rate supplied to the main shaft bearing 20 according to the acquired lubricating oil flow rate include: acquiring the lubricating oil flow rate of each sub-bearing in the main shaft bearing 20 in real time; when all the acquired lubricating oil flow rates are greater than the first upper limit threshold required by the corresponding sub-bearings, reducing the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole; when all the acquired lubricating oil flow rates are less than the first lower limit threshold required by the corresponding sub-bearings, increasing the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole; wherein the first upper limit threshold required by all sub-bearings is the same or different, and the first lower limit threshold required by all sub-bearings is the same or different.

[0106] Among them, when the lubricating oil flow rate of at least one sub-bearing obtained is between the first upper limit threshold value and the first lower limit threshold value required by the sub-bearing; in the remaining sub-bearings, when any lubricating oil flow rate obtained is greater than the first upper limit threshold value required by the corresponding sub-bearing, the lubricating oil flow rate supplied to the corresponding sub-bearing is reduced; in the remaining sub-bearings, when any lubricating oil flow rate obtained is less than the first lower limit threshold value required by the corresponding sub-bearing, the lubricating oil flow rate supplied to the corresponding sub-bearing is increased.

[0107] In addition, after the step of reducing the lubricating oil flow rate supplied to the corresponding sub-bearing, the step may also include adaptively increasing the lubricating oil flow rate supplied to the remaining one or more sub-bearings to complete an adjustment; after the step of increasing the lubricating oil flow rate supplied to the corresponding sub-bearing, the step may also include adaptively reducing the lubricating oil flow rate supplied to the remaining one or more sub-bearings to complete an adjustment; wherein, after each adjustment is completed, at least a second set time must be allowed to elapse before another adjustment can be made.

[0108] In a third specific embodiment, the method comprises the following steps:

[0109] Pumping lubricating oil to the gear box 10 and the main shaft bearing 20 at the same time;

[0110] The lubricating oil flow rate of the main shaft bearing 20 is obtained in real time, the lubricating oil flow rate supplied to the main shaft bearing 20 is adjusted according to the obtained lubricating oil flow rate, and the remaining lubricating oil is pumped 30 to the gear box 10 .

[0111] Among them, the steps of acquiring the lubricating oil flow rate of the main shaft bearing 20 in real time and adjusting the lubricating oil flow rate supplied to the main shaft bearing 20 according to the acquired lubricating oil flow rate include: acquiring the lubricating oil flow rate supplied to the main shaft bearing 20 in real time; when the acquired lubricating oil flow rate is greater than a third upper limit threshold, reducing the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole; when the acquired lubricating oil flow rate is less than a third lower limit threshold, increasing the lubricating oil flow rate supplied to the main shaft bearing 20 as a whole.

[0112] Furthermore, it also includes real-time acquisition of the lubricating oil flow rate of each sub-bearing in the main shaft bearing 20; when any of the obtained lubricating oil flow rates is greater than the fourth upper limit threshold required by the corresponding sub-bearing, reducing the lubricating oil flow rate supplied to the corresponding sub-bearing; when any of the obtained lubricating oil flow rates is less than the fourth lower limit threshold, increasing the lubricating oil flow rate supplied to the corresponding sub-bearing.

[0113] Furthermore, after the step of reducing the lubricating oil flow rate supplied to the corresponding sub-bearing, the step also includes adaptively increasing the lubricating oil flow rate supplied to the remaining one or more sub-bearings to complete an adjustment; after the step of increasing the lubricating oil flow rate supplied to the corresponding sub-bearing, the step also includes adaptively reducing the lubricating oil flow rate supplied to the remaining one or more sub-bearings to complete an adjustment; wherein, after each adjustment is completed, at least a second set time must be allowed to elapse before adjustment can be performed again.

[0114] The lubricating oil distribution system according to one embodiment of the present invention is described in detail below.

[0115] The intelligent lubrication distribution system provides a lubricating oil diversion technology for the wind turbine gearbox 10 and the liquid sliding main shaft bearing 20, ensuring the lubrication flow requirements of the wind turbine gearbox 10 and the main shaft bearing 20, solving the wear and failure caused by poor lubrication of the gearbox 10 and the main shaft bearing 20, and improving reliability.

[0116] Specifically, the intelligent lubrication distribution system provides flow diversion between the wind turbine gearbox 10 and the main shaft bearing 20, as well as the front bearing 210, the rear bearing 220 and the thrust bearing 230, to meet the overall flow diversion between the wind turbine gearbox 10 and the main shaft bearing 20, as well as the flow diversion requirements between the sub-bearings of the main shaft bearing 20, ensuring that the gearbox 10 and the main shaft bearing 20 are fully lubricated and operate well.

[0117] The intelligent lubrication distribution system includes an oil pump 30, a two-way ball valve, an angle actuator, a servo controller, a first branch flowmeter 610, a second branch flowmeter 620, a third branch flowmeter 630, a first throttle valve 521, a second throttle valve 531, a third throttle valve 541 and a housing 90.

[0118] The oil pump 30 is a quantitative pump. The oil pump 30 outputs high-pressure lubricating oil to lubricate and cool the gearbox 10 and the main shaft bearing 20. The displacement of the pump meets the flow requirements of the gearbox 10 and the main shaft bearing 20. The two-way ball valve can adjust the flow of lubricating oil supplied from the main road 510 to the main shaft bearing 20. As the viscosity of the lubricating oil and the system pressure change, the opening size is adjusted by the two-way ball valve to meet the lubrication amount flowing into the main shaft bearing 20. The angle actuator controls the opening size of the two-way ball valve through the feedback signal of the servo controller. The function of the first throttle valve 521 is to adjust the lubrication flow of the front bearing 210. The function of the second throttle valve 531 is to adjust the lubrication flow of the rear bearing 220. The function of the third throttle valve 541 is to adjust the lubrication flow of the thrust bearing 230. The first branch flowmeter 610 is used to monitor the lubrication flow of the front bearing 210 and feedback the servo controller. The second branch flowmeter 620 is used to monitor the lubrication flow of the rear bearing 220. The third branch flowmeter 630 is used to monitor the lubrication flow of the thrust bearing 230. The housing 90 is used to integrate and install the two-way ball valve, the angle actuator, the throttle valve and the internal flow channel. The servo controller is used to compare the flow feedback of the flow meter with the set flow value, and adjust the opening of the two-way ball valve through the angle actuator to adjust the lubrication flow supplied to the main shaft bearing 20.

[0119] When the distribution system is working, the oil pump 30 provides the system with pressurized lubricating oil required by the gearbox 10 and the main shaft bearing 20. The lubricating oil flows in two pipelines, one leading to the inlet of the gearbox 10 for lubrication and cooling of the gearbox 10, and the other meeting the lubrication flow of the main shaft bearing 20 through the adjustment of the two-way ball valve and the angle actuator, and then distributed to the front bearing 210, the rear bearing 220 and the thrust bearing 230 through the first throttle valve 521, the second throttle valve 531 and the third throttle valve 541, so that the three sub-bearings get the required amount of lubricating oil.

[0120] Control principle Figure 3 and Figure 4 As shown, when the flow rate of the front bearing 210 is lower than the set value, the first branch flow meter 610 feeds back a signal to the servo controller, and the servo controller sends a control signal to the angular actuator to increase the opening of the two-way ball valve, so that the lubrication flow rate to the main shaft bearing 20 and the front bearing 210 meets the set value. On the contrary, when the lubrication flow rate of the front bearing 210 is higher than the set value, the first branch flow meter 610 feeds back a signal to the servo controller, and the servo controller sends a control signal to the angular actuator to reduce the opening of the two-way ball valve, so that the lubrication flow rate to the main shaft bearing 20 and the front bearing 210 meets the set value. Since the flow rate ratio of the front bearing 210, the rear bearing 220 and the thrust bearing 230 of the main shaft bearing 20 is determined, controlling the flow rate of the front bearing 210 controls the lubrication amount of the entire main shaft bearing 20. The total lubrication amount of the distribution system is constant, and the lubrication amount distributed to the main shaft bearing 20 is the design demand. The remaining flow is the required lubrication amount of the gear box 10. The intelligent lubrication distribution system can realize the oil distribution function under any temperature conditions without the need for human operation.

[0121] Of course, the first throttle valve 521, the second throttle valve 531 and the third throttle valve 541 can also be replaced by the first proportional speed regulating valve, the second proportional speed regulating valve and the third proportional speed regulating valve respectively. According to the demand of lubricating oil quantity of each sub-bearing, the first branch flow meter 610, the second branch flow meter 620 and the third branch flow meter 630 can be used to monitor and transmit the feedback signal to the servo controller or other controller, and the servo controller or other controller outputs the control signal to the corresponding proportional speed regulating valve, and the oil distribution is adjusted by the proportional speed regulating valve to ensure the accurate control of the lubricating oil quantity of each sub-bearing.

[0122] The distribution system lubricates the gearbox 10 and the main shaft bearing 20, and the lubricating oil is accurately distributed. The three sub-bearings have the functions of diversion and flow monitoring, thereby ensuring the accurate distribution of lubricating oil to the three sub-bearings of the gearbox 10 and the main shaft bearing 20 of the wind turbine generator set, real-time data monitoring, reducing the wear and failure of the gearbox 10 and the main shaft bearing 20 caused by insufficient lubrication, and improving reliability.

[0123] Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It should be understood that, in the opinion of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention defined by the claims.

Claims

1. A lubricating oil distribution system for a wind turbine generator set, wherein the wind turbine generator set comprises a gearbox (10) and a main shaft bearing (20), characterized in that: The lubricating oil distribution system comprises: Oil pump (30); A first pipeline (40) is used to connect between the oil outlet of the oil pump (30) and the oil inlet of the gear box (10); a second pipeline (50) used for connecting between the first pipeline (40) and the main shaft bearing (20); A flow monitoring module (60) for monitoring the flow of lubricating oil supplied to the main shaft bearing (20); a flow regulating module (70) capable of regulating the flow of lubricating oil supplied to the main shaft bearing (20) through the second pipeline (50); The first controller (80) is signal-connected to the flow monitoring module (60) and the flow regulating module (70), respectively. The first controller (80) is capable of receiving feedback data from the flow monitoring module (60) and outputting a control signal to the flow regulating module (70) according to the feedback data, so as to regulate the flow rate of lubricating oil supplied to the main shaft bearing (20) through the flow regulating module (70).

2. The lubricating oil distribution system according to claim 1, characterized in that: The main shaft bearing (20) comprises a plurality of sub-bearings; The second pipeline (50) comprises a main pipeline (510) and a plurality of branch pipelines; the flow regulating module (70) is connected to the main pipeline (510); one end of each branch pipeline is connected to the main pipeline (510) and the other end is connected to a corresponding sub-bearing; the flow regulating module (70) is capable of regulating the flow of lubricating oil flowing out of the main pipeline (510).

3. The lubricating oil distribution system according to claim 2, characterized in that: The flow monitoring module (60) includes a flow meter, and the first controller (80) is capable of receiving the feedback data from the flow meter.

4. The lubricating oil distribution system according to claim 3, characterized in that: The flow meter comprises a plurality of branch flow meters, which are arranged one by one on the plurality of branches and are used to monitor the flow of lubricating oil supplied to each of the sub-bearings; The first controller (80) is capable of outputting a control signal to the flow regulation module (70) according to feedback data received from at least one of the plurality of branch flow meters.

5. The lubricating oil distribution system according to claim 4, characterized in that: The sub-bearings, the branches, and the branch flowmeters are multiple and are arranged one by one, and the lubrication flow supplied to the multiple sub-bearings meets a predetermined ratio. The first controller (80) can output a control signal to the flow regulation module (70) based on feedback data received from any one of the multiple branch flowmeters.

6. The lubricating oil distribution system according to claim 5, characterized in that: When the first controller (80) receives feedback data from any one of the plurality of branch flow meters that is greater than a first upper limit threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module (70) so that the flow regulating module (70) reduces the flow of lubricating oil supplied to the main shaft bearing (20); When the first controller (80) receives feedback data from any one of the plurality of branch flow meters that is less than a first lower limit threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module (70) so that the flow regulating module (70) increases the flow rate of lubricating oil supplied by the second pipeline (50) to the main shaft bearing (20); Each time the first controller (80) outputs a control signal to the flow regulating module (70), it must wait at least a first set time before it can output again.

7. The lubricating oil distribution system according to claim 6, characterized in that: The plurality of branch passages are configured to supply lubricating oil to the plurality of sub-bearings respectively according to set ratios.

8. The lubricating oil distribution system according to claim 6, characterized in that: The lubricating oil distribution system further comprises: A plurality of flow regulating valves are arranged on the plurality of branches in a one-to-one correspondence, and the flow regulating valves can regulate the flow of lubricating oil supplied from the branch to the corresponding sub-bearing.

9. The lubricating oil distribution system according to claim 6, characterized in that: The lubricating oil distribution system further comprises: a second controller, signal-connected to the plurality of flow regulating valves and the plurality of branch flow meters, respectively, the second controller being capable of receiving feedback data from any one of the plurality of branch flow meters, and outputting a control signal to the corresponding flow regulating valve according to the feedback data, so that the flow regulating valve automatically adjusts the flow of lubricating oil supplied to the corresponding sub-bearing; The first controller and the second controller are the same controller, or the first controller and the second controller are independently configured.

10. The lubricating oil distribution system according to claim 9, characterized in that: When the feedback data received from any branch flow meter is greater than the second upper limit threshold required by the corresponding sub-bearing, the second controller outputs a control signal to the flow regulating valve on the same branch to make the flow regulating valve reduce the flow of lubricating oil supplied to the corresponding sub-bearing, and the second upper limit threshold is less than the first upper limit threshold; When the feedback data received from any branch flow meter is less than the second lower limit threshold required by the corresponding sub-bearing, the second controller outputs a control signal to the flow regulating valve on the same branch to cause the flow regulating valve to increase the lubricating oil flow supplied to the corresponding sub-bearing, and the second lower limit threshold is greater than the first lower limit threshold.

11. The lubricating oil distribution system according to claim 10, characterized in that: The second controller outputs a control signal to the flow regulating valve on the same branch line so that the flow regulating valve reduces the flow rate of lubricating oil supplied to the corresponding sub-bearing, and also outputs a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves adaptively increases the flow rate of lubricating oil supplied to the corresponding sub-bearing. The second controller outputs a control signal to the flow regulating valve on the same branch line so that the flow regulating valve increases the flow rate of lubricating oil supplied to the corresponding sub-bearing, and also outputs a control signal to the remaining flow regulating valves so that one or more of the remaining flow regulating valves adaptively decrease the flow rate of lubricating oil supplied to the corresponding sub-bearing; and / or Each time the second controller outputs a control signal to the plurality of flow regulating valves, it must wait for at least a second set time before it can output again.

12. The lubricating oil distribution system according to claim 9, characterized in that: The flow regulating valve is a proportional speed regulating valve.

13. The lubricating oil distribution system according to claim 8, characterized in that: The flow regulating valve is a throttle valve.

14. The lubricating oil distribution system according to claim 4, characterized in that: There are multiple sub-bearings, branches, and branch flowmeters, which are respectively arranged in one-to-one correspondence; When the first controller (80) receives feedback data from each branch flow meter that is greater than a first upper limit threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module (70) so that the flow regulating module (70) reduces the flow of lubricating oil supplied to the main shaft bearing (20); When the first controller (80) receives feedback data from each branch flow meter that is less than a first lower limit threshold required by the corresponding sub-bearing, it outputs a control signal to the flow regulating module (70) so that the flow regulating module (70) increases the flow rate of lubricating oil supplied to the main shaft bearing (20); Each time the first controller (80) outputs a control signal to the flow regulating module (70), it must wait at least a first set time before it can output again; The first upper limit thresholds required for all the sub-bearings are the same or different, and the first lower limit thresholds required for all the sub-bearings are the same or different.

15. The lubricating oil distribution system according to claim 14, characterized in that: The lubricating oil distribution system further comprises: A plurality of flow regulating valves are arranged on the plurality of branches in a one-to-one correspondence, and the flow regulating valves can regulate the flow of lubricating oil supplied from the branch to the corresponding sub-bearing; The first controller is respectively connected to the multiple flow regulating valves and the multiple branch flow meter signals. The first controller can receive feedback data from any one of the multiple branch flow meters, and output a control signal to the corresponding flow regulating valve according to the feedback data, so that the flow regulating valve automatically adjusts the flow of lubricating oil supplied to the corresponding sub-bearings.

16. The lubricating oil distribution system according to claim 15, characterized in that: The first controller receives feedback data from at least one of the branch flow meters that is between a first upper threshold and a first lower threshold required by the corresponding sub-bearing; When the feedback data of any of the other branch flow meters is greater than the first upper limit threshold required by the corresponding sub-bearing, the first controller outputs a control signal to the flow regulating valve on the same branch to cause the flow regulating valve to reduce the flow of lubricating oil supplied to the corresponding sub-bearing. When the feedback data of any other branch flow meter is less than the first lower limit threshold required by the corresponding sub-bearing, the first controller outputs a control signal to the flow regulating valve on the same branch to cause the flow regulating valve to increase the lubricating oil flow supplied to the corresponding sub-bearing.

17. The lubricating oil distribution system according to claim 3, characterized in that: The flow meter includes a main flow meter and a plurality of branch flow meters, wherein the main flow meter is arranged on the main flow and used to monitor the flow rate of the lubricating oil supplied to the main shaft bearing as a whole, and the plurality of branch flow meters are arranged one by one on the plurality of branch flows and used to monitor the flow rate of the lubricating oil supplied to each of the sub-bearings; The first controller is capable of outputting a control signal to the flow regulating module (70) according to feedback data received from the main flow meter.

18. The lubricating oil distribution system according to claim 17, characterized in that: The lubricating oil distribution system further comprises: A plurality of flow regulating valves are arranged on the plurality of branches in a one-to-one correspondence, and the flow regulating valves can regulate the flow of lubricating oil supplied from the branch to the corresponding sub-bearing; a second controller, signal-connected to the plurality of flow regulating valves and the plurality of branch flow meters, respectively, the second controller being capable of receiving feedback data from any one of the plurality of branch flow meters, and outputting a control signal to the corresponding flow regulating valve according to the feedback data, so that the flow regulating valve automatically adjusts the flow of lubricating oil supplied to the corresponding sub-bearing; The first controller and the second controller are the same controller, or the first controller and the second controller are independently configured.

19. The lubricating oil distribution system according to claim 3, characterized in that: The main shaft bearing comprises a front bearing (210), a rear bearing (220) and a thrust bearing (230); The plurality of branches include a first branch (520), a second branch (530) and a third branch (540), the first branch (520) being used to supply lubricating oil to the front bearing (210), the second branch (530) being used to supply lubricating oil to the rear bearing (220), and the third branch (540) being used to supply lubricating oil to the thrust bearing (230); The flow meter comprises a first branch flow meter (610), a second branch flow meter (620) and a third branch flow meter (630), which are respectively arranged on the first branch (520), the second branch (530) and the third branch (540).

20. The lubricating oil distribution system according to any one of claims 3 to 19, characterized in that: The flow regulating module (70) comprises: A two-way valve (710) is arranged on the second pipeline (50); An actuator (720) is used to adjust the valve port size of the two-way valve (710) under the control of the first controller (80).

21. The lubricating oil distribution system according to claim 20, characterized in that: The two-way valve (710) is a two-way ball valve, and the actuator (720) is an angle actuator; and / or The oil pump (30) is a quantitative pump.

22. The lubricating oil distribution system according to claim 20, characterized in that The lubricating oil distribution system further comprises: A housing (90), the first pipeline (40) and the second pipeline (50) extending into the housing (90), the flow monitoring module (60) being arranged in the housing (90), and the two-way valve (710) being arranged in the housing (90).

23. A wind turbine generator set, characterized in that: The wind turbine generator set comprises: An oil storage tank, a gear box (10), a main shaft bearing (20) and a lubricating oil distribution system as described in any one of claims 1 to 22, wherein the oil pump (30) is connected to the oil storage tank, the first pipeline (40) connects the oil outlet of the oil pump and the gear box (10), and the second pipeline (50) connects the first pipeline (40) and the main shaft bearing (20).

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