CN116357875A

CN116357875A - Bearing maintenance device, bearing lubrication maintenance method and wind turbine generator system

Info

Publication number: CN116357875A
Application number: CN202111617665.3A
Authority: CN
Inventors: 刘建军; 李少亮; 李凯
Original assignee: Beijing Goldwind Smart Energy Service Co Ltd
Current assignee: Beijing Goldwind Smart Energy Service Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2023-06-30

Abstract

The invention relates to a bearing maintenance device, a bearing lubrication maintenance method and a wind generating set. Bearing maintenance device, bearing have bear the hold chamber of lubrication material, bearing maintenance device includes: a liquid storage part for storing a cleaning agent; one end of the connecting pipeline is communicated with the liquid storage part, and the other end of the connecting pipeline is communicated with the accommodating cavity of the bearing; the power unit comprises a hydraulic driving part and a gas driving part, wherein the hydraulic driving part is connected with the liquid storage part to convey cleaning agent into the accommodating cavity of the bearing through the hydraulic pump, and the gas driving part is communicated with the connecting pipeline to convey gas into the accommodating cavity of the bearing and push the cleaning agent to be discharged from the accommodating cavity. The cleaning agent of the bearing maintenance device not only can dissolve lubricating oil in the bearing, but also can bring impurities and abrasion particles in the bearing out of the bearing together, so that the inside of the bearing is effectively cleaned, the service life of the bearing is prolonged, and the safe operation of the wind turbine generator system is ensured.

Description

Bearing maintenance device, bearing lubrication maintenance method and wind turbine generator system

Technical Field

The invention relates to the technical field of machine manufacturing, in particular to a bearing maintenance device, a bearing lubrication maintenance method and a wind generating set.

Background

Under the condition that the running time of bearing parts of the wind generating set such as a pitch bearing, a yaw bearing and the like is long, the internal grease is difficult to smoothly discharge, and the grease can be gradually dried and lose fluidity along with the loss of base oil, so that the lubrication effect is reduced or even lost. The common lubricating maintenance means of the wind generating set is to periodically supplement oil, but the lubricating grease which is maintained and supplemented is mixed with the old lubricating grease in the bearing and then can be quickly deteriorated. Under the condition of poor lubrication, the service life of the bearing is shortened sharply, the bearing is easy to fail, the bearing failure treatment means is to replace the bearing, high hoisting and replacement cost is required, if the bearing failure is not found in time, serious accidents such as blade falling or incapability of normal yaw and the like can also occur, and huge economic loss is caused.

The existing technical means for solving the problem of poor lubrication of the variable pitch, yaw and other bearings of the wind turbine generator set is to dilute lubricating grease by filling base oil into the bearings, so that a re-lubrication effect is achieved, but impurities and wear particles in the bearings cannot be effectively removed by the method, the grease is still in a pollution state, and the service life of the bearings is reduced.

Disclosure of Invention

The embodiment of the invention provides a bearing maintenance device, a bearing lubrication maintenance method and a wind generating set. The cleaning agent not only can dissolve lubricating oil in the bearing, but also can bring impurities and abrasion particles in the bearing out of the bearing together, so that the inside of the bearing is effectively cleaned, the service life of the bearing is prolonged, and the safe operation of the wind generating set is ensured.

According to an embodiment of the present invention, there is provided a bearing maintenance device having a housing chamber carrying a lubricating substance, the bearing maintenance device including: a liquid storage part for storing a cleaning agent; one end of the connecting pipeline is communicated with the liquid storage part, and the other end of the connecting pipeline is communicated with the accommodating cavity of the bearing; the power unit comprises a hydraulic driving part and a gas driving part, wherein the hydraulic driving part is connected with the liquid storage part, so that the cleaning agent is sent into the accommodating cavity of the bearing through the hydraulic pump, and the gas driving part is communicated with the connecting pipeline, so that gas is conveyed into the accommodating cavity of the bearing, and the cleaning agent is pushed to be discharged from the accommodating cavity.

According to an aspect of the embodiment of the present invention, the liquid storage part includes a cavity containing a cleaning agent, the cavity has a liquid flow hole, and the filter is disposed in the cavity and covers the liquid flow hole, so as to filter the lubricating substance in the containing cavity entering the liquid storage part along with the cleaning agent.

According to an aspect of the embodiment of the present invention, the cleaning agent heating device further comprises a heating element, wherein the heating element is disposed outside or inside the cavity of the liquid storage part and is connected with the liquid storage part to heat the cleaning agent.

According to an aspect of the embodiment of the present invention, the bearing maintenance device further includes a temperature detector configured to detect a temperature parameter of the cleaning agent in the cavity and to feed back the detected temperature parameter to the first controller, and the first controller acquires the temperature parameter and controls the heating member to heat the cleaning agent to reach a preset temperature value if the temperature parameter is lower than the preset temperature value. So as to ensure the activity of the cleaning agent and improve the cleaning effect. The cleaning agent is insulated, so that the activity of the cleaning agent is ensured, and the cleaning effect is improved.

According to an aspect of the embodiment of the present invention, the bearing maintenance device further includes a mass measurement member and a second controller, the mass measurement member is connected to the liquid storage member, the mass measurement member measures a weight parameter of the liquid storage member, the weight parameter is fed back to the second controller, the second controller obtains the weight parameter, and the second controller is configured to determine a weight capable of containing a lubricating substance in a containing cavity of the bearing according to the weight parameter. Providing basis for the weight of the lubricating substance to be re-injected into the accommodating cavity later.

According to an aspect of an embodiment of the present invention, the connection pipe includes a main pipe, a pipe distributor, and a plurality of branch pipes, the pipe distributor includes a first port and a plurality of second ports, the first port is selectively communicated with at least one of the second ports, the main pipe is communicated with the liquid storage part and the first port, and one end of each of the branch pipes is communicated with one of the second ports and the other end is used for being communicated with a containing cavity of the bearing.

According to an aspect of the embodiment of the present invention, the bearing maintenance device further includes a gas pipe and a liquid pipe, the gas driving part is communicated with the main pipe through the gas pipe, the hydraulic driving part is communicated with the liquid storage part through the liquid pipe, and the pipe diameter of the liquid pipe is larger than or equal to that of the gas pipe.

According to another aspect of the embodiment of the present invention, a method for maintaining a bearing is provided, including: detecting whether the performance of lubricating substances in a containing cavity of the bearing exceeds a first preset threshold range; providing a bearing maintenance device as in any of the embodiments above, communicating the connecting conduit with the receiving chamber of the bearing when the property of the lubricating substance exceeds the first preset threshold range; controlling a hydraulic driving part of the power unit so that the cleaning agent in the liquid storage part enters the accommodating cavity of the bearing under the pushing of the hydraulic pump and is mutually dissolved with the lubricating substance; and controlling the gas driving part of the power unit so that the cleaning agent in the accommodating cavity of the bearing returns to the liquid storage part under the pushing of gas.

According to another aspect of the embodiment of the present invention, between the step of communicating the connecting line with the housing chamber of the bearing for housing the lubricating substance and the step of controlling the hydraulic drive section of the power unit, further comprising: controlling the gas driving part of the power unit to charge a predetermined amount of gas into the accommodating cavity of the bearing; and detecting the air pressure in the accommodating cavity, and replacing the sealing ring of the bearing when the air pressure is lower than a second preset threshold range. So as to prevent the cleaning agent from overflowing from the sealing ring of the bearing. So as to prevent the cleaning agent from overflowing from the sealing ring of the bearing.

According to another aspect of the embodiment of the present invention, between the step of communicating the connecting line with the housing chamber of the bearing for housing the lubricating substance and the step of controlling the hydraulic drive section of the power unit, further comprising: inserting a measuring ruler with a preset thickness between the bearing and a sealing ring matched with the bearing; and if the measuring ruler can be inserted between the bearing and the sealing ring, replacing the sealing ring of the bearing. So as to prevent the cleaning agent from overflowing from the sealing ring of the bearing.

According to another aspect of the embodiment of the present invention, the step of replacing the seal ring of the bearing includes: providing a sealing strip; fixing a sealing strip at a preset position of the bearing; and the sealing ring tool assembly is utilized to enable the two ends of the sealing strip to be bonded and adhered to form the sealing ring.

According to another aspect of the embodiment of the invention, the sealing ring tooling assembly comprises a first fixing piece and a second fixing piece which are used for fixing two ends of the sealing strip respectively, and the first fixing piece and the second fixing piece are connected in a sliding manner so as to drive the two ends of the sealing strip to be attached.

According to another aspect of the embodiment of the invention, the cleaning agent comprises at least one of an organic solvent, a water-based cleaning agent, clear water and a water cutting agent.

According to another aspect of the embodiment of the invention, the cleaning agent is used in the order of organic solvent, water-based cleaning agent, clear water and water cutting agent. The cleaning agents are used according to a certain sequence and matched with each other, so that the cleaning effect is ensured.

According to another aspect of the embodiment of the present invention, after the step of controlling the gas driving part of the power unit so that the cleaning agent located in the housing chamber of the bearing returns to the liquid storage part under the pushing of the gas, the method further comprises: detecting whether the cleaned accommodating cavity meets preset requirements or not; and if the pressure liquid does not meet the preset requirement, repeating the step of controlling the hydraulic driving part of the power unit so that the cleaning agent in the liquid storage part enters the accommodating cavity of the bearing under the pushing of the pressure liquid and is mutually dissolved with the lubricating substance, and the step of controlling the gas driving part of the power unit so that the cleaning agent in the accommodating cavity of the bearing returns to the liquid storage part under the pushing of the gas until the accommodating cavity after cleaning meets the preset requirement.

According to another aspect of the embodiment of the present invention, in the step of controlling the hydraulic driving part of the power unit so that the cleaning agent located in the liquid storage part enters the accommodating chamber of the bearing under the pushing of the hydraulic pump and is mutually dissolved with the lubricating substance, the method comprises the following steps: the bearing is provided with a first opening and a second opening which are communicated with the accommodating cavity, and the bearing is rotated so that the height of the first opening is higher than that of the second opening along the vertical direction; and opening the second opening, and controlling the hydraulic driving part to enable the cleaning agent in the liquid storage part to enter the accommodating cavity of the bearing through the second opening under the pushing of pressure liquid and to be mutually dissolved with the lubricating substance.

According to another aspect of the embodiment of the present invention, in the step of controlling the gas driving part of the power unit so that the cleaning agent located in the containing chamber of the bearing returns to the liquid storage part under the pushing of the gas, the method includes: the bearing is provided with a first opening and a second opening which are communicated with the accommodating cavity, and the bearing is rotated so that the height of the first opening is higher than that of the second opening along the vertical direction; and opening the first opening, and controlling the gas driving part to enable the cleaning agent in the accommodating cavity to return to the liquid storage part through the first opening.

According to another aspect of the embodiment of the present invention, between the step of controlling the hydraulic driving part of the power unit and the step of controlling the gas driving part of the power unit, further comprising: measuring the mass change of the cleaning agent in the liquid storage part to obtain the mass of the cleaning agent entering the accommodating cavity; and obtaining the volume of the accommodating cavity according to the mass of the cleaning agent entering the accommodating cavity.

According to another aspect of the embodiment of the present invention, after the step of controlling the gas driving part of the power unit so that the cleaning agent located in the containing chamber of the bearing returns to the liquid storage part under the pushing of the gas, the method further includes: and quantitatively injecting lubricating substances into the accommodating cavity of the bearing according to the volume of the accommodating cavity.

According to a further aspect of an embodiment of the present invention, a wind power generator set is presented, comprising: a tower; a nacelle; the device is arranged at one end of the tower in the axial direction of the tower; an impeller disposed in the nacelle, the impeller including a hub and blades; the bearing assembly comprises a yaw bearing and a pitch bearing, the yaw bearing is connected between the tower and the cabin, and the pitch bearing is connected between the hub and the blades; the bearing maintenance apparatus as in any one of the embodiments above, capable of connecting and maintaining at least one of the yaw bearing and the pitch bearing.

The bearing maintenance device provided by the embodiment of the invention comprises a liquid storage part, a connecting pipeline and a power unit, wherein the power unit comprises a hydraulic driving part and a gas driving part. When the bearing needs to be cleaned, the connecting pipeline is communicated with the accommodating cavity of the bearing, and cleaning agent can be injected into the liquid storage part in advance or temporarily. And then, opening a hydraulic driving part of the power unit to send the cleaning agent into the accommodating cavity of the bearing through a hydraulic pump of the hydraulic driving part, and dissolving and cleaning lubricating substances in the accommodating cavity of the bearing by the cleaning agent. Finally, the gas driving part of the power unit is used for conveying gas into the accommodating cavity of the bearing and pushing the cleaning agent to be discharged from the accommodating cavity, and the gas driving part is used for conveying gas into the accommodating cavity of the bearing, so that the gas cannot pollute the accommodating cavity or produce impurity residues, the cleaning effect of the accommodating cavity is ensured, and the cleaning process can be circularly carried out for a plurality of times to improve the cleaning effect. The cleaning agent can be used for dissolving lubricating oil in the bearing, and can also bring impurities and abrasion particles in the bearing out of the bearing, so that the inside of the bearing is effectively cleaned, the service life of the bearing is prolonged, and the safe operation of the wind generating set is ensured.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a bearing maintenance apparatus according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method of maintaining a bearing in accordance with one embodiment of the present invention;

FIG. 3 is a front view of a seal ring tooling assembly according to one embodiment of the present invention;

FIG. 4 is a side view of a seal ring tooling assembly in use according to one embodiment of the present invention;

FIG. 5 is a side view of a seal ring tooling assembly in use according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of the structure of a fatliquoring pump according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a wind turbine generator system according to an embodiment of the present application.

Wherein:

1-a liquid storage component;

2-connecting pipelines; 21-a main pipeline; 22-branch pipe; 23-piping distributor; 231-first interface; 232-a second interface;

3-a power unit; 31-a hydraulic drive section; 32-a gas driving part; 23-piping distributor; 231-first interface; 232-a second interface;

4-a filter; 5-heating element; 6-gas piping; 7-a liquid conduit;

8-a sealing ring tool assembly; 81-a first fixing member; 82-a second securing member;

9-a guide rail;

10-a fatting pump; 11-a grease barrel;

12-tower; 13-nacelle; 14-impeller; 141-a hub; 142-leaves;

q-cavity; a Z-bearing; m-sealing strips; k1-a first opening; k2—a second opening; y1-a first pressing member; y2-second pressing piece.

In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The azimuth words appearing in the following description are all directions shown in the drawings, and do not limit the specific structures of the bearing maintenance device, the bearing lubrication maintenance method and the wind turbine generator set of the present invention. In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

Under the condition that the running time of bearing parts of the existing wind turbine generator is long, such as a pitch bearing, a yaw bearing and the like, the internal grease is difficult to smoothly discharge, and as the base oil is lost, the grease is gradually dried and loses fluidity, so that the lubrication effect is reduced or even lost. The service life of the bearing is shortened sharply under the condition of poor lubrication, the bearing is easy to fail, the bearing failure treatment means is to replace the bearing, high hoisting and replacement cost is needed, if the bearing failure is not found in time, serious accidents of blade falling can occur, and huge economic loss is caused.

The existing technical means for solving the problem of poor lubrication of bearing parts of a wind turbine generator set is to dilute lubricating grease by filling base oil into the bearing, so that a re-lubrication effect is achieved, but impurities and wear particles in the bearing cannot be effectively removed by the method, the grease is still in a pollution state, and the service life of the bearing cannot be effectively prolonged.

Based on the technical problems, the embodiment of the invention provides the bearing maintenance device, which can clean the inside of the bearing, and the cleaning agent not only can dissolve lubricating oil in the bearing, but also can bring impurities and wear particles in the bearing out of the bearing, so that the inside of the bearing is effectively cleaned, the service life of the bearing is prolonged, and the safe operation of a wind generating set is ensured.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a bearing maintenance device according to an embodiment of the invention. The bearing maintenance device provided by the embodiment of the invention is characterized in that a bearing Z is provided with a containing cavity for bearing lubricating substances, and the bearing maintenance device comprises: the cleaning device comprises a liquid storage part 1, a connecting pipeline 2 and a power unit 3, wherein the liquid storage part 1 is used for storing cleaning agents. One end of the connecting pipeline 2 is communicated with the liquid storage part 1, and the other end is communicated with a containing cavity of the bearing Z. The power unit 3 includes a hydraulic driving part 31 and a gas driving part 32, the hydraulic driving part 31 is connected with the liquid storage part 1 to send the cleaning agent into the accommodating cavity of the bearing Z through the hydraulic pump, and the gas driving part 32 is communicated with the connecting pipeline 2 to convey gas into the accommodating cavity of the bearing Z and push the cleaning agent to be discharged from the accommodating cavity.

The bearing maintenance device provided by the embodiment of the invention comprises a liquid storage part 1, a connecting pipeline 2 and a power unit 3, wherein the power unit 3 comprises a hydraulic driving part 31 and a gas driving part 32. When the bearing Z needs to be cleaned, the connecting pipeline 2 is communicated with the accommodating cavity of the bearing Z, and cleaning agent can be injected into the liquid storage part 1 in advance or temporarily. After that, the hydraulic driving unit 31 of the power unit 3 is opened to send the cleaning agent into the housing chamber of the bearing Z by the hydraulic pump of the hydraulic driving unit 31, and the cleaning agent dissolves and cleans the lubricating substance in the housing chamber of the bearing Z. And finally, the gas is conveyed into the accommodating cavity of the bearing Z through the gas driving part 32 of the power unit 3 and pushes the cleaning agent to be discharged from the accommodating cavity, and the gas is conveyed into the accommodating cavity of the bearing Z through the gas driving part 32, so that the gas cannot pollute the accommodating cavity or produce impurity residues, the cleaning effect of the accommodating cavity is ensured, and the cleaning process can be circularly carried out for a plurality of times to improve the cleaning effect. The cleaning agent can be used for dissolving lubricating oil in the bearing Z, impurities and abrasion particles in the bearing Z can be taken out of the bearing Z together, the inside of the bearing Z is effectively cleaned, the service life of the bearing Z is prolonged, and the safe operation of the wind generating set is ensured.

Alternatively, the liquid storage part 1 may be a container made of metal, ceramic, or the like, and any material that does not react with the cleaning agent, is not corroded by the cleaning agent, or does not affect the cleaning effect of the cleaning agent may be used.

Optionally, the connecting pipe 2 is used for allowing the cleaning agent to circulate, so that the connecting pipe 2 needs to be made of an erosion-resistant material, and meanwhile, considering that the pressure to which the connecting pipe 2 is subjected is relatively large when the cleaning agent flows in the connecting pipe 2 under the pushing of a hydraulic pump or gas driven gas, the connecting pipe 2 can be a high-pressure pipe specifically, so that the service life is ensured, and the unsmooth pipeline caused by bending of the pipeline in working can be prevented.

The hydraulic driving unit 31 of the power unit 3 includes a hydraulic pump, and the working medium such as pressure oil pumped by the hydraulic pump drives the cleaning agent from the liquid storage part 1 into the accommodating chamber of the bearing Z. The gas driving part 32 may be a pneumatic pump, and can pump high-pressure gas to drive the cleaning agent to be discharged from the accommodating cavity of the bearing Z.

With continued reference to fig. 1, in order to increase the efficiency of the use of the cleaning agent, in some alternative embodiments, the liquid storage component 1 includes a cavity Q containing the cleaning agent, the cavity Q having a liquid flow hole, and the filter element 4 is disposed in the cavity Q and covers the liquid flow hole to filter the lubricating substance in the cavity along with the cleaning agent entering the liquid storage component 1.

Since a part of the lubricating substance and other impurities can flow back to the liquid storage part 1 together with the cleaning agent when the cleaning agent is discharged from the accommodating cavity of the bearing Z, the liquid flow hole of the cavity Q can be covered with the filter element 4, and can be either an inlet hole of the cleaning agent or an outlet hole of the cleaning agent, namely, the filter screen can filter the cleaning agent once when the cleaning agent flows back to the liquid storage part 1 from the accommodating cavity, so that the lubricating substance or other impurities are prevented from entering the liquid storage part 1, and when the cleaning agent flows out from the liquid storage part 1 and enters the accommodating cavity, the filter screen can filter the cleaning agent again so as to prevent the lubricating substance or other impurities from flowing back to the accommodating cavity.

With continued reference to FIG. 1, the higher the working temperature, the higher the activity of the molecules, and the better the cleaning effect, due to the temperature dependence of the activity of the portion of the cleaning agent. In order to improve the activity of the cleaning agent, optionally, the bearing maintenance device provided by the embodiment of the invention further includes a heating element 5, where the heating element 5 is disposed outside or inside the cavity Q of the liquid storage component 1 and connected to the liquid storage component 1 to heat the cleaning agent.

The cleaning agent in the cavity Q of the liquid storage part 1 can be heated through the heating part 5, the heating part 5 can be arranged outside the cavity Q of the liquid storage part 1, the cleaning agent is indirectly heated by utilizing heat conduction of the liquid storage part 1, the installation and the debugging of the heating part 5 are convenient, the heating part 5 can also be arranged inside the cavity Q of the liquid storage part 1, the cleaning agent is directly heated, the heating efficiency is higher, the heating part 5 can be particularly in a heating mode such as resistance type or electromagnetic type, and the like, and the cleaning agent heating device is not particularly limited.

In order to monitor the temperature of the cleaning agent in real time and to keep the cleaning agent at a preset temperature, in some alternative embodiments, the bearing maintenance device further comprises a temperature detector and a first controller, wherein the temperature detector is configured to detect a temperature parameter of the cleaning agent in the cavity Q, and feed back the detected temperature parameter to the first controller, the first controller obtains the temperature parameter, and if the temperature parameter is lower than the preset temperature value, the heating element 5 is controlled to heat the cleaning agent so that the cleaning agent reaches the preset temperature value.

In this embodiment, the first controller may be a control device such as a PLC (Programmable Logic Controller, a programmable logic controller) or a single chip microcomputer, and the temperature parameter of the cleaning agent in the cavity Q is monitored in real time through the temperature detector, and when the temperature parameter obtained by the first controller is lower than a preset temperature value, that is, the temperature of the cleaning agent does not reach a high activity temperature, the first controller controls the heating element 5 to heat the cleaning agent, so that the cleaning agent reaches the preset temperature value, and the cleaning effect of the cleaning agent is improved. According to different types and characteristics of the cleaning agent, the preset temperature values corresponding to the required activation are different, and the cleaning agent can be set according to actual conditions. Alternatively, the preset temperature value is 60 °. The cleaning agent can be heated to 60 degrees and kept warm by the cooperation of the heating element 5, the temperature detector and the first controller.

Since it is also necessary to re-inject the lubrication substance into the receiving chamber after cleaning the receiving chamber of the bearing Z, in order to determine the mass of the lubrication substance that can be received in the receiving chamber, in some alternative embodiments, the bearing maintenance device further comprises a mass measuring element and a second controller, the mass measuring element being connected to the liquid storage part 1, the mass measuring element measuring a weight parameter of the liquid storage part 1, the weight parameter being fed back to the second controller, the second controller obtaining the weight parameter and being configured to determine the weight of the lubrication substance that can be received in the receiving chamber of the bearing Z based on the weight parameter.

In this embodiment, the mass measurement element needs to measure the weight parameter of the liquid storage component 1 in real time, so as to obtain the weight change of the cleaning agent in the liquid storage component 1, and then determine the weight of the cleaning agent entering the accommodating cavity through the weight change of the cleaning agent, when the accommodating cavity is filled with the cleaning agent, the reduction amount of the cleaning agent weight of the liquid storage component 1 is approximately equal to the weight of the cleaning agent which can be accommodated in the accommodating cavity, and the second controller determines the weight which can accommodate the lubricating substance in the accommodating cavity of the bearing Z according to the obtained weight parameter, so as to provide a basis for subsequently reinjecting the lubricating substance into the accommodating cavity.

With continued reference to fig. 1, in order to increase the efficiency of injection or evacuation of the cleaning agent into or from the receiving cavity of the bearing Z, in some alternative embodiments, the connecting conduit 2 comprises a main conduit 21, a conduit distributor 23 and a plurality of branch conduits 22, the conduit distributor 23 comprising a first interface 231 and a plurality of second interfaces 232, the first interface 231 being in selective communication with at least one of the second interfaces 232, the main conduit 21 being in communication with the reservoir 1 and the first interface 231, one end of each branch conduit 22 being in communication with one of the second interfaces 232 and the other end being in communication with the receiving cavity of the bearing Z.

Utilize pipeline distributor 23 can make the cleaner come in and go out from a plurality of branch pipelines 22 and hold the chamber, specifically, every branch pipeline 22 can respectively with bearing Z hold the chamber intercommunication, promptly the cleaner can get into bearing Z hold the chamber or follow bearing Z hold the chamber discharge simultaneously through a plurality of branch pipelines 22, guarantees bearing Z multitube way injection and backward flow function, has effectively improved bearing Z's cleaning efficiency.

Optionally, the main pipe 21 and the first interface 231 of the pipe distributor 23 and the second interfaces 232 of the pipe distributor 23 and the branch pipes 22 are connected by quick plugs, so that quick assembly and disassembly are realized.

With continued reference to fig. 1, in order to achieve driving of the cleaning agent, the bearing maintenance device optionally further includes a gas pipe 6 and a liquid pipe 7, the gas driving portion 32 is communicated with the main pipe 21 through the gas pipe 6, the hydraulic driving portion 31 is communicated with the liquid storage part 1 through the liquid pipe 7, and the pipe diameter of the liquid pipe 7 is greater than or equal to the pipe diameter of the gas pipe 6.

The gas pipe 6 and the liquid pipe 7 in this embodiment may be high-pressure oil pipes, so as to prevent the working medium of the hydraulic driving portion 31 or the gas flow of the gas driving portion 32 from being affected due to the unsmooth pipe caused by bending of the pipe in working. Since the pressure of the liquid medium borne by the liquid pipe 7 is generally larger than the gas pressure borne by the gas pipe 6, in the present embodiment, the pipe diameter of the liquid pipe 7 may be set larger than the pipe diameter of the gas pipe 6 to improve the pressure-resistant performance of the liquid pipe 7. Of course, the pipe diameter of the liquid pipeline 7 can be equal to the pipe diameter of the gas pipeline 6, so that uniform installation is facilitated.

Referring to fig. 2, fig. 2 is a flowchart of a method for maintaining a bearing according to an embodiment of the present invention. The embodiment of the invention also provides a maintenance method of the bearing, which comprises the following steps:

S110: detecting whether the performance of lubricating substances in a containing cavity of the bearing Z exceeds a first preset threshold range or not;

s120: providing a bearing maintenance device as in any of the embodiments described above, when the properties of the lubricating substance exceed a first preset threshold range, communicating the connecting duct 2 with the containing chamber of the bearing Z;

s130: controlling the hydraulic driving part 31 of the power unit 3 so that the cleaning agent in the liquid storage part 1 enters the accommodating cavity of the bearing Z under the pushing of the hydraulic pump and is mutually dissolved with the lubricating substance;

s140: the gas driving part 32 of the power unit 3 is controlled so that the cleaning agent located in the accommodation chamber of the bearing Z is returned to the liquid storage part 1 by the pushing of the gas.

According to the method for maintaining the bearing provided by the embodiment of the invention, when the performance of the lubricating substance exceeds the first preset threshold range, namely the lubricating substance of the bearing Z cannot enable the bearing Z to work normally, and the damage risk exists, the connecting pipeline 2 of the bearing maintenance device can be communicated with the accommodating cavity of the bearing Z, the accommodating cavity of the bearing Z is cleaned by utilizing the bearing maintenance device, specifically, after the connecting pipeline 2 is communicated with the accommodating cavity of the bearing Z, the hydraulic driving part 31 of the power unit 3 is controlled, so that the cleaning agent is sent into the accommodating cavity of the bearing Z through the hydraulic pump of the hydraulic driving part 31, and the cleaning agent dissolves and cleans the lubricating substance in the accommodating cavity of the bearing Z. Finally, the gas driving part 32 of the power unit 3 is controlled to convey gas into the accommodating cavity of the bearing Z, so that the cleaning agent in the accommodating cavity of the bearing Z returns to the liquid storage part 1 under the pushing of the gas, and the gas does not pollute the accommodating cavity or produce impurity residues due to the fact that the gas driving part 32 conveys the gas into the accommodating cavity of the bearing Z, the cleaning effect of the accommodating cavity is guaranteed, and the cleaning process can be circularly carried out for a plurality of times, so that the cleaning effect is improved. The cleaning agent can be used for dissolving lubricating oil in the bearing Z, impurities and abrasion particles in the bearing Z can be taken out of the bearing Z together, the inside of the bearing Z is effectively cleaned, the service life of the bearing Z is prolonged, and the safe operation of the wind generating set is ensured.

In step S110, it is detected whether the performance of the lubricating substance in the accommodating cavity of the bearing Z exceeds the first preset threshold range, specifically, whether a certain metal content of the lubricating substance in the accommodating cavity exceeds the first preset threshold range may be detected, and if so, the performance of the lubricating substance is damaged, and the safe operation of the bearing Z cannot be ensured. In particular, the iron content of the lubricating substance can be detected, if it exceeds 1000 mg/kg, i.e. exceeds the standard, the housing chamber of the bearing Z needs to be cleaned, although it is also possible to detect other metal contents, such as copper, if it exceeds 500 mg/kg, i.e. exceeds the standard.

In step S120, the connecting line 2 is connected to the receiving space of the bearing Z, and the cleaning agent to be used can be injected into the liquid storage part 1 at the same time.

In step S130, the hydraulic driving unit 31 of the power unit 3 may be controlled by a control device such as a PLC (Programmable Logic Controller ) or a single chip microcomputer, and may be manually controlled, but is not particularly limited.

In step S140, when the gas driving unit 32 of the power unit 3 is controlled to perform gas discharge, the hydraulic driving unit 31 is in a stopped state, that is, the hydraulic driving unit 31 is not operated, and the switching from the operation of the hydraulic driving unit 31 to the operation of the gas driving unit 32 may be specifically controlled by a controller or a manual operation, and is not particularly limited.

In some alternative embodiments, between the step of communicating the connecting line with the housing chamber of the bearing Z for housing the lubricating substance and the step of controlling the hydraulic drive 31 of the power unit 3, it further comprises: the gas driving part 32 of the power unit 3 is controlled to charge a predetermined amount of gas into the accommodating cavity of the bearing Z; and detecting the air pressure in the accommodating cavity, and replacing the sealing ring of the bearing Z when the air pressure is lower than a second preset threshold range.

Since the fluidity of the cleaning agent is better than that of the lubricating substance, it is necessary to check whether or not the sealing property of the sealing ring of the bearing Z satisfies the requirement in order to prevent the cleaning agent from overflowing from the sealing ring of the bearing Z. Specifically, the gas driving part 32 of the power unit 3 is controlled to charge a predetermined amount of gas into the accommodating cavity of the bearing Z, if the tightness of the bearing Z is not satisfactory, the gas leaks, the gas pressure in the accommodating cavity is also reduced, and when the gas pressure is lower than the second preset threshold range, that is, the tightness of the bearing Z is problematic, and the sealing ring of the bearing Z needs to be replaced.

In addition to the above-described form, other methods may be employed to detect the tightness between the bearing Z and the seal ring, and specifically, between the step of communicating the connecting line with the accommodation chamber of the bearing Z for accommodating the lubricating substance and the step of controlling the hydraulic drive section 31 of the power unit 3, further include: a measuring ruler with a preset thickness is inserted between the bearing Z and a sealing ring matched with the bearing Z; if the measuring ruler can be inserted between the bearing Z and the sealing ring, the sealing ring of the bearing Z is replaced.

Alternatively, the predetermined thickness of the measuring rule is 0.01 mm-0.1 mm, and it should be noted that the thickness of the measuring rule should not be too small, and if too small, the measuring rule may not be inserted due to softness and easy deformation. Whether can insert bearing Z and with bearing Z complex sealing washer between detect the leakproofness between bearing Z and the sealing washer through the dipperstick of predetermined thickness, easy operation is convenient.

As shown in fig. 3 to 5, fig. 3 is a front view of a seal ring tooling assembly 8 according to an embodiment of the present invention; FIG. 4 is a side view of the seal ring tooling assembly 8 in use according to one embodiment of the present invention;

fig. 5 is a side view of a seal ring tooling assembly 8 in use according to another embodiment of the present invention. Optionally, the step of replacing the sealing ring of the bearing Z includes: providing a sealing strip M; fixing the sealing strip M at a preset position of the bearing Z; and the sealing ring tool assembly 8 is utilized to enable the two ends of the sealing strip M to be bonded and adhered to form a sealing ring.

Due to the influence of other components connected with the bearing Z, such as an impeller, the sealing ring cannot be directly arranged on the bearing Z, but the sealing strip M needs to be fixed at a preset position of the bearing Z so as to avoid interference, and then the sealing ring tool assembly 8 is utilized to enable the two ends of the sealing strip M to be bonded and adhered to form the sealing ring. The two ends of the sealing strip M are usually pre-coated with adhesive, so that the two ends are adhered to form a closed sealing ring.

As shown in fig. 5, optionally, the sealing ring tooling assembly 8 includes a first fixing member 81 and a second fixing member 82 for fixing two ends of the sealing strip M respectively, and the first fixing member 81 and the second fixing member 82 are slidably connected to each other, so as to drive the two ends of the sealing strip M to be attached to each other.

Specifically, the first fixing piece 81 and the second fixing piece 82 each include a first pressing piece Y1 for fixing the sealing strip M, and the first fixing piece 81 and the second fixing piece 82 are slidably connected through the guide rail 9, and a second pressing piece Y2 is disposed between the first fixing piece 81, the second fixing piece 82 and the guide rail 9. The two ends of the sealing strip M are driven to be attached through relative sliding between the first fixing piece 81 and the second fixing piece 82 along the guide rail 9, so that the accuracy of attaching positions and the bonding effect are guaranteed, the tightness of the sealing ring is further improved, and cleaning agent is prevented from overflowing from the attaching position of the sealing ring.

In some alternative embodiments, the cleaning agent comprises at least one of an organic solvent, a water-based cleaning agent, clear water, and a water cutting agent.

When cleaning is carried out, one or more of an organic solvent, a water-based cleaning agent, clear water and a water cutting agent can be used, and when a plurality of cleaning agents are adopted, the cleaning agents are used in a separated mode so as to avoid mutual influence, and the cleaning agents can be used in a certain sequence and matched with each other, so that the cleaning effect is ensured.

Optionally, the cleaning agent is used in the order of organic solvent, water-based cleaning agent, clear water and water cutting agent.

In this embodiment, the organic solvent can soften and dissolve most greasy dirt, and through cleaning equipment with inside most greasy dirt of bearing Z wash out, the organic solvent still has some lubricated effects concurrently simultaneously, and trace residue of cleaner can coexist with the grease, can not influence the lubricating property of grease.

The water-based cleaning agent is used after the organic solvent is used, the intractable grease blocks can be peeled off through soaking and washing, and residual grease which cannot be removed by the organic solvent is peeled off from the metal surface through chemical reaction and is carried out of the bearing Z.

The clean water mainly has the function of cleaning the water-based cleaning agent, and the residual chemical substances of the water-based cleaning agent are dissolved and then brought out of the bearing Z.

The water cutting agent is a functional cleaning agent, water can remain in the bearing Z after the cleaning is finished, if grease is directly added or an organic solvent is used for flushing, the oil can not wrap the metal surface because the affinity between the water and the metal surface of the bearing Z is greater than that of the oil, the active ingredients in the water cutting agent can strip the water from the metal surface and bring the water out of the bearing Z, and the residual water in the bearing Z can be brought out of the bearing Z after the cleaning by using the water cutting agent.

After the water cutting agent is washed, the organic solvent is used for washing the bearing Z again, so that the surface of the bearing Z can be wrapped by organic molecules, and lubricating substances can be directly filled after the organic solvent is discharged, and the lubricating performance is guaranteed.

It should be noted that the cleaning time and soaking time of each cleaning agent should be properly formulated, the organic solvent should be washed for longer than the soaking time, the water-based cleaning agent should be soaked for longer than the cleaning time, the specific time is customized according to the grease condition in the bearing Z, and the cleaning process of the cleaning agent should be replaced in time due to poor cleaning process.

Considering that the accommodating cavity of the bearing Z may not be completely cleaned by only one cleaning, the accommodating cavity after cleaning may meet a preset requirement in order to ensure that the accommodating cavity after cleaning. Optionally, after the step of controlling the gas driving part 32 of the power unit 3 so that the cleaning agent located in the containing chamber of the bearing Z returns to the liquid storage part 1 under the pushing of the gas, the method further includes: detecting whether the cleaned accommodating cavity meets preset requirements or not; if not, the step of controlling the hydraulic driving part 31 of the power unit 3 so that the cleaning agent in the liquid storage part 1 enters the accommodating cavity of the bearing Z under the pushing of the pressure liquid and is mutually dissolved with the lubricating substance and the step of controlling the gas driving part 32 of the power unit 3 so that the cleaning agent in the accommodating cavity of the bearing Z returns to the liquid storage part 1 under the pushing of the gas are repeated until the cleaned accommodating cavity meets the preset requirement.

It should be noted that, whether the cleaned accommodating cavity meets the preset requirement is detected, specifically, whether residual lubricating substances exist in the cleaned accommodating cavity can be detected through an endoscope, if no residual lubricating substances exist, the preset requirement is met, and cleaning is stopped; if the residual lubricating substances exist, the power unit 3 is controlled to enable the cleaning agent to circularly enter the accommodating cavity of the bearing Z for cleaning until the cleaned accommodating cavity meets the preset requirement.

In order to facilitate the observation of whether the detergent in the bearing Z fills the entire housing cavity, in some alternative embodiments, the step of controlling the hydraulic driving part 31 of the power unit 3 so that the detergent in the liquid storage part 1 enters the housing cavity of the bearing Z and is mutually soluble with the lubricating substance under the pushing of the hydraulic pump comprises: the bearing Z is provided with a first opening K1 and a second opening K2 which are communicated with the accommodating cavity, and is rotated so that the height of the first opening K1 is higher than that of the second opening K2 along the vertical direction; the second opening K2 is opened, and the hydraulic driving part 31 is controlled so that the cleaning agent in the liquid storage part 1 enters the accommodating cavity of the bearing Z through the second opening K2 and is mutually dissolved with the lubricating substance under the pushing of the pressure liquid.

The height of the first opening K1 of the accommodating cavity of the bearing Z is higher than that of the second opening K2, and the cleaning agent enters the accommodating cavity from the second opening K2 with lower height, so that a user can observe the height position of the cleaning agent in the accommodating cavity through the first opening K1, and excessive injection of the cleaning agent is avoided, and the cleaning agent overflows from the first opening K1.

Optionally, through adjusting the cleaner velocity of flow, when being applied to wind generating set with bearing maintenance device in the cleaning process, can be through letting wind generating set take modes such as pitch action, make cleaning performance better.

In order to improve the discharging efficiency and the discharging rate of the cleaning agent in the accommodating chamber, optionally, the step of controlling the gas driving part 32 of the power unit 3 to make the cleaning agent in the accommodating chamber of the bearing Z return to the liquid storage part 1 under the pushing of the gas includes: the bearing Z is provided with a first opening K1 and a second opening K2 which are communicated with the accommodating cavity, and is rotated so that the height of the first opening K1 is higher than that of the second opening K2 along the vertical direction; the first opening K1 is opened, and the gas driving part 32 is controlled so that the cleaning agent located in the accommodating chamber returns to the liquid storage part 1 through the first opening K1.

In this embodiment, the cleaning agent is discharged from the second opening K2 with a lower height to the accommodating cavity, so that the cleaning agent is rapidly discharged from the second opening K2 under the action of gravity, and the cleaning agent is not easy to remain in the accommodating cavity due to the lower height of the second opening K2, so that the cleaning agent in the accommodating cavity is discharged more cleanly.

In order to determine the mass of lubricating substance that can be contained in the containment chamber, in some alternative embodiments, between the step of controlling the hydraulic drive 31 of the power unit 3 and the step of controlling the gas drive 32 of the power unit 3, it further comprises: measuring the mass change of the cleaning agent in the liquid storage part 1 to obtain the mass of the cleaning agent entering the accommodating cavity; and obtaining the volume of the accommodating cavity according to the mass of the cleaning agent entering the accommodating cavity.

The weight of the cleaning agent entering the accommodating cavity is determined through the weight change of the cleaning agent, when the accommodating cavity is filled with the cleaning agent, the reduction of the weight of the cleaning agent of the liquid storage part 1 is approximately equal to the weight of the cleaning agent which can be accommodated by the accommodating cavity, and then the volume of the accommodating cavity is obtained according to the weight of the cleaning agent entering the accommodating cavity, so that a basis is provided for the weight of the lubricating substance which is injected into the accommodating cavity again in the follow-up process.

Optionally, after the step of controlling the gas driving part 32 of the power unit 3 so that the cleaning agent located in the containing cavity of the bearing Z returns to the liquid storage part 1 under the pushing of the gas, the method further includes: and quantitatively injecting lubricating substances into the accommodating cavity of the bearing Z according to the volume of the accommodating cavity.

It will be appreciated that after cleaning the receiving cavity of the bearing Z, it is necessary to re-inject a lubricating substance, such as grease, into the receiving cavity to re-lubricate the bearing Z, update the grease inside the bearing Z, and restore the lubricated state of the bearing Z to the factory state. The amount of the lubricating substance injected into the accommodating cavity needs to be selected according to the volume of the accommodating cavity, so that the problem that the amount of the lubricating substance injected into the accommodating cavity is too small to play a lubricating role or too large to cause overflowing of the lubricating substance from the accommodating cavity and waste is avoided. Specifically, the fat injection amount is not less than 70% of the inner space of the accommodating chamber.

The lubricating substance can be filled in a centralized manner at one time, and can be combined with regular filling, namely, the lubricating substance is filled at set time and quantity or according to working conditions.

When the centralized filling is adopted, attention is required, the grease filling flow is not too fast, and the grease filling flow is not more than 300ml per minute; setting at least 6 grease distribution points, and uniformly distributing the grease to the bearing Z for a circle during filling, so as to ensure uniform grease filling; the pitch action should be carried out at least once every 5min when filling, so that the distribution of lubricating substances is more reasonable.

When regular filling maintenance type filling is adopted, attention is also required, and the oiling equipment can be effectively and surely arranged in the hub of the wind generating set and runs in random groups; setting a timing and quantitative grease filling logic or a grease filling logic according to working conditions through a controller; at least 6 grease distribution points are arranged and uniformly distributed on the bearing Z for one circle, so that grease injection is ensured to be uniform. The maintenance type grease filling device has the advantages that the maintenance type grease filling device can realize the maintenance and grease filling of the bearing Z according to the established logic implementation by adopting the regular filling maintenance type grease filling, so that the operation and maintenance efficiency is improved, and the operation and maintenance cost is reduced.

As shown in fig. 6, the lubrication material can be filled by using the greasing pump 10, the greasing pump 10 is covered on a standard 16kg or 18kg grease barrel 11, so that grease can be filled, the grease can be completely filled by the action of the greasing pump 10, and no large grease residue exists in the filled barrel basically.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present application. The embodiment of the invention also provides a wind generating set, which comprises: a tower 12; a nacelle 13; is arranged at one end of the tower 12 in the axial direction thereof; an impeller 14 provided in the nacelle 13, the impeller 14 including a hub 141 and blades 142; the bearing assembly comprises a yaw bearing and a pitch bearing, wherein the yaw bearing is connected between the tower 12 and the cabin 13, and the pitch bearing is connected between the hub 141 and the blades 142; the bearing maintenance device as in any of the embodiments above, the bearing maintenance device being capable of connecting and maintaining at least one of a yaw bearing and a pitch bearing.

According to the wind generating set provided by the embodiment of the invention, at least one of the yaw bearing and the pitch bearing can be maintained through the bearing maintenance device, so that the tooth surface abrasion of the pitch drive and the pitch bearing can be reduced, the pitch precision is further improved, the running current and the running temperature of the pitch drive motor are reduced, and the motor is protected. The method is used for maintaining the variable pitch bearing, can also reduce the tooth surface abrasion of the yaw bearing during use, and prolongs the service life.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. Bearing maintenance device, the bearing (Z) having a housing chamber carrying a lubricating substance, characterized in that it comprises:

a liquid storage part (1) for storing a cleaning agent;

One end of the connecting pipeline (2) is communicated with the liquid storage part (1), and the other end of the connecting pipeline is communicated with the accommodating cavity of the bearing (Z);

the power unit (3) comprises a hydraulic driving part (31) and a gas driving part (32), wherein the hydraulic driving part (31) is connected with the liquid storage component (1) so as to feed the cleaning agent into the accommodating cavity of the bearing (Z) through a hydraulic pump, and the gas driving part (32) is communicated with the connecting pipeline (2) so as to convey gas into the accommodating cavity of the bearing (Z) and push the cleaning agent to be discharged from the accommodating cavity.

2. Bearing maintenance apparatus according to claim 1, wherein the liquid storage part (1) comprises a cavity (Q) containing a cleaning agent, the cavity (Q) having a liquid flow hole, the filter (4) being arranged in the cavity (Q) and covering the liquid flow hole to filter the lubricating substance in the containing cavity entering the liquid storage part (1) with the cleaning agent.

3. Bearing maintenance apparatus according to claim 2, further comprising a heating element (5), said heating element (5) being provided outside or inside said cavity (Q) of said liquid storage member (1) and being connected to said liquid storage member (1) for heating said cleaning agent.

4. A bearing maintenance apparatus according to claim 3, further comprising a temperature detector configured to detect a temperature parameter of the cleaning agent in the cavity (Q) and to feed back the detected temperature parameter to the first controller, wherein the first controller acquires the temperature parameter and controls the heating member (5) to heat the cleaning agent to a preset temperature value if the temperature parameter is lower than the preset temperature value.

5. Bearing maintenance device according to claim 1, further comprising a mass measuring element connected to the reservoir part (1), and a second controller, the mass measuring element measuring a weight parameter of the reservoir part (1), the weight parameter being fed back to the second controller, the second controller obtaining the weight parameter, configured to determine the weight of lubricating substance that can be contained in the containment chamber of the bearing (Z) from the weight parameter.

6. Bearing maintenance apparatus according to any one of claims 1 to 5, wherein the connecting duct (2) comprises a main duct (21), a duct distributor (23) (23) and a plurality of branch ducts (22), the duct distributor (23) (23) comprising a first interface (231) (231) and a plurality of second interfaces (232) (232), the first interface (231) (231) being selectively communicable with at least one of the second interfaces (232) (232), the main duct (21) being communicable with the liquid storage part (1) and the first interface (231) (231), one end of each of the branch ducts (22) being communicable with one of the second interfaces (232) (232) and the other end being adapted to communicate with a receiving chamber of the bearing (Z).

7. Bearing maintenance device according to claim 6, further comprising a gas pipe (6) and a liquid pipe (7), wherein the gas driving part (32) is communicated with the main pipe (21) through the gas pipe (6), the hydraulic driving part (31) is communicated with the liquid storage part (1) through the liquid pipe (7), and the pipe diameter of the liquid pipe (7) is larger than or equal to the pipe diameter of the gas pipe (6).

8. A method of maintaining a bearing (Z), comprising:

detecting whether the performance of the lubricating substance in the accommodating cavity of the bearing (Z) exceeds a first preset threshold range;

-providing a bearing maintenance device according to any one of claims 1 to 7, when the properties of the lubricating substance are outside the first preset threshold range, communicating the connecting duct (2) with the containing chamber of the bearing (Z);

controlling a hydraulic driving part (31) of the power unit (3) so that the cleaning agent in the liquid storage part (1) enters a containing cavity of the bearing (Z) under the pushing of the hydraulic pump and is mutually dissolved with the lubricating substance;

and controlling a gas driving part (32) of the power unit (3) so that the cleaning agent positioned in the accommodating cavity of the bearing (Z) returns to the liquid storage part (1) under the pushing of gas.

9. The bearing lubrication maintenance method according to claim 8, characterized by further comprising, between the step of communicating the connecting line with a housing chamber of a bearing (Z) for housing a lubricating substance and the step of controlling a hydraulic drive section (31) of the power unit (3):

controlling the gas driving part (32) of the power unit (3) to charge a predetermined amount of gas into the accommodating cavity of the bearing (Z);

detecting the air pressure in the accommodating cavity, and replacing the sealing ring of the bearing (Z) when the air pressure is lower than a second preset threshold range.

10. The bearing lubrication maintenance method according to claim 8, characterized by further comprising, between the step of communicating the connecting line with a housing chamber of a bearing (Z) for housing a lubricating substance and the step of controlling a hydraulic drive section (31) of the power unit (3):

inserting a measuring ruler with a preset thickness between the bearing (Z) and a sealing ring matched with the bearing (Z);

and if the measuring ruler can be inserted between the bearing (Z) and the sealing ring, replacing the sealing ring of the bearing (Z).

11. Bearing lubrication maintenance method according to claim 9 or 10, characterized in that said step of replacing the sealing ring of the bearing (Z) comprises:

Providing a sealing strip (M);

fixing a sealing strip (M) at a predetermined position of the bearing (Z);

and the sealing ring tool assembly is utilized to enable the two ends of the sealing strip (M) to be bonded and adhered to form the sealing ring.

12. The bearing lubrication maintenance method according to claim 11, wherein the seal ring tooling assembly comprises a first fixing piece (81) and a second fixing piece (82) for fixing two ends of the seal strip (M) respectively, and the first fixing piece (81) and the second fixing piece (82) are connected in a sliding manner so as to drive the two ends of the seal strip (M) to be attached.

13. The method according to claim 8, wherein the cleaning agent comprises at least one of an organic solvent, a water-based cleaning agent, clear water, and a water cutting agent.

14. The method according to claim 8, wherein the cleaning agent is used in the order of organic solvent, water-based cleaning agent, clear water, water cutting agent.

15. The bearing lubrication maintenance method according to claim 8, characterized by further comprising, after the step of controlling the gas drive portion (32) of the power unit (3) so that the cleaning agent located in the housing chamber of the bearing (Z) returns to the liquid storage member (1) under the pushing of the gas:

Detecting whether the cleaned accommodating cavity meets preset requirements or not;

if not, repeating the step of controlling the hydraulic driving part (31) of the power unit (3) so that the cleaning agent in the liquid storage part (1) enters the accommodating cavity of the bearing (Z) under the pushing of pressure liquid and is mutually dissolved with the lubricating substance, and the step of controlling the gas driving part (32) of the power unit (3) so that the cleaning agent in the accommodating cavity of the bearing (Z) returns to the liquid storage part (1) under the pushing of gas until the accommodating cavity after cleaning meets the preset requirement.

16. The method of bearing lubrication maintenance according to claim 8, characterized in that, in the step of controlling the hydraulic drive (31) of the power unit (3) so that the detergent in the reservoir (1) enters the housing chamber of the bearing (Z) under the pushing of the hydraulic pump and is miscible with the lubricating substance, it comprises:

the bearing (Z) is provided with a first opening (K1) and a second opening (K2) which are communicated with the accommodating cavity, and the bearing (Z) is rotated so that the height of the first opening (K1) is higher than the height of the second opening (K2) along the vertical direction;

Opening the second opening (K2), and controlling the hydraulic driving part (31) so that the cleaning agent in the liquid storage part (1) enters the accommodating cavity of the bearing (Z) through the second opening (K2) under the pushing of pressure liquid and is mutually dissolved with the lubricating substance.

17. The method of bearing lubrication maintenance according to claim 8, characterized in that, in the step of controlling the gas drive portion (32) of the power unit (3) so that the cleaning agent located in the housing chamber of the bearing (Z) returns to the liquid storage member (1) under the pushing of the gas, it comprises:

the first opening (K1) is opened, and the gas driving part (32) is controlled so that the cleaning agent in the accommodating cavity returns to the liquid storage part (1) through the first opening (K1).

18. The bearing lubrication maintenance method according to claim 8, characterized by further comprising, between the step of controlling a hydraulic drive section (31) of the power unit (3) and the step of controlling a gas drive section (32) of the power unit (3):

Measuring the mass change of the cleaning agent in the liquid storage component (1) to obtain the mass of the cleaning agent entering the accommodating cavity;

and obtaining the volume of the accommodating cavity according to the mass of the cleaning agent entering the accommodating cavity.

19. The bearing lubrication maintenance method according to claim 18, characterized in that the step of controlling the gas drive portion (32) of the power unit (3) such that the cleaning agent located in the housing chamber of the bearing (Z) is returned to the liquid storage member (1) under the pushing of the gas further comprises:

and quantitatively injecting lubricating substances into the accommodating cavity of the bearing (Z) according to the volume of the accommodating cavity.

20. A wind turbine generator set, comprising:

a tower (12);

a nacelle (13); is arranged at one end of the tower (12) in the axial direction of the tower;

an impeller (14) provided in the nacelle (13), the impeller (14) including a hub (141) and blades (142);

a bearing assembly comprising a yaw bearing connected between the tower (12) and the nacelle (13) and a pitch bearing connected between the hub (141) and the blades (142);

the bearing maintenance apparatus of any one of claims 1 to 7, being capable of connecting and maintaining at least one of the yaw bearing and the pitch bearing.