CN116116802A - Cleaning device and method for main shaft bearing of wind turbine generator - Google Patents
Cleaning device and method for main shaft bearing of wind turbine generator Download PDFInfo
- Publication number
- CN116116802A CN116116802A CN202310034010.6A CN202310034010A CN116116802A CN 116116802 A CN116116802 A CN 116116802A CN 202310034010 A CN202310034010 A CN 202310034010A CN 116116802 A CN116116802 A CN 116116802A
- Authority
- CN
- China
- Prior art keywords
- cleaning
- bearing
- main shaft
- wind turbine
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 171
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000005461 lubrication Methods 0.000 claims abstract description 53
- 239000002699 waste material Substances 0.000 claims abstract description 22
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 101
- 238000002347 injection Methods 0.000 claims description 56
- 239000007924 injection Substances 0.000 claims description 56
- 239000012459 cleaning agent Substances 0.000 claims description 52
- 239000004519 grease Substances 0.000 claims description 48
- 238000007789 sealing Methods 0.000 claims description 39
- 239000002904 solvent Substances 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 20
- 239000010687 lubricating oil Substances 0.000 claims description 18
- 230000001050 lubricating effect Effects 0.000 claims description 17
- 238000002791 soaking Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 8
- 238000003556 assay Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 14
- 238000007127 saponification reaction Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
- B08B1/143—Wipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Wind Motors (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The application discloses a cleaning device and a method for a main shaft bearing of a wind turbine, wherein the method comprises the following steps: s1, preparing before cleaning; s2, dismantling an end cover; s3, cleaning preparation work; s4, cleaning; s5, checking after cleaning; s6, ending and recovering work. According to the cleaning device and the cleaning method for the main shaft bearing of the wind turbine generator, the lubrication environment of the main shaft bearing of the wind turbine generator is improved, the lubrication direction is changed, the improvement of the lubrication environment of the bearing and the dredging of the lubrication path are realized, so that the service life of the main shaft bearing is prolonged, the bearing is directly and efficiently lubricated, meanwhile, the waste oil in an oil chamber can be thoroughly cleaned, the problem of poor lubrication environment of the bearing is solved, the occurrence probability of backward movement of a transmission chain caused by failure of the bearing can be effectively reduced, the triggering of serious faults is avoided, and the reliability and the stability of the operation of the wind turbine generator are improved.
Description
Technical Field
The application relates to the technical field of wind turbine generator system cleaning, in particular to a cleaning device and a cleaning method for a main shaft bearing of a wind turbine generator system.
Background
Along with the continuous progress of technology, environmental protection has become one of the important concerns. In order to solve the problem of air pollution, the generation of pollutants can be effectively reduced by replacing thermal power generation with clean renewable new energy sources such as wind power. The maintenance of the wind turbine generator is a main problem faced by wind power generation. At present, 1250kW type wind turbine generator system adopted by wind power generation is easy to generate a transmission chain backward fault. Out of 78 products put into production in 2009, 26 transmission chain backward faults occur in total, the model fault rate is 33%, and the cost investment and the electric quantity loss are up to 1300 ten thousand yuan. The main shaft bearing is an important component of the wind turbine generator, and the running state of the main shaft bearing is gradually reduced along with the increase of the service life of the wind turbine generator. In combination with the recent main bearing failure mode, the failure probability is at least twice lower than that of the axial lubrication path due to the fact that the failure mode is mainly caused by a severe lubrication environment and the radial lubrication path is adopted by the old type bearing through research. At present, bearing problems can be identified in advance through various technological means, but effective governance measures are lacking in aspects of improvement of lubricating environment of the main bearing and optimization of solving on a lubricating path tower.
As shown in fig. 1, a lubrication circuit of a main bearing 001 of a conventional wind turbine generator is designed such that grease injection holes 002 are axially opened from above end caps on both sides, and grease discharge holes 003 are axially opened from below end caps on both sides. Grease is injected from grease inlets 002 on two sides of the main bearing 001, flows through the oil chamber 004, and flows into the bearing raceways 005 for lubrication after the oil chamber 004 is filled. It can be seen that grease is deposited after passing through the oil chamber 005 and is then carried into the raceway 005 by means of the rotation of the rolling elements. However, due to the insufficient design of the lubrication system of the main shaft bearing in the oil injection direction, the oil cavity is large, the carrying capacity is weak, and the phenomenon of poor oil discharge capacity is caused. Therefore, the base oil in the grease is separated out in the oil chamber with the increase of time, so that the grease is saponified and hardened, and finally the phenomenon that new grease flows into the main bearing raceway, namely, new oil cannot be injected and old oil cannot be discharged is hindered. Moreover, because the main shaft bearing works in a relatively severe lubrication state for a long time, the excessive copper/iron substances generated by long-term abrasion can cause fish scale peeling damage to the parts of the bearing roller, the rollaway nest, the inner ring, the flange and the like, so that the bearing finally and thoroughly fails under the action of the axial force of the transmission chain and the whole transmission chain moves backwards, thereby triggering serious faults.
Disclosure of Invention
The object of the present application is to solve at least to some extent one of the technical problems described above.
Therefore, the first object of the present invention is to provide a cleaning device for a main shaft bearing, which optimizes a severe lubrication environment of an oil chamber of a bearing seat by a cleaning method, dredges a channel of a lubrication path, and directly and efficiently lubricates the bearing by changing a lubrication direction of the main shaft bearing, and simultaneously can thoroughly clean hardened saponified grease with an oil chamber with an exceeding content and dredge an oil drainage loop, thereby solving the problem of poor lubrication environment of the bearing, further reducing failure risk of the main bearing and occurrence probability of backward movement of a transmission chain caused by the failure risk, avoiding triggering of serious faults, improving operation reliability and stability of a wind turbine generator, realizing technical transplanting application value for various models, and reducing replacement cost of the device.
A second object of the present invention is to provide a method for cleaning a spindle bearing.
To achieve the above object, an embodiment of the first aspect of the present application provides a cleaning device for a spindle bearing of a wind turbine, which includes a spindle 1, an end cap 2 disposed around the spindle 1, and a cleaning apparatus 3,
the end cover 2 comprises a bearing seat 21, an oil cavity 22, a bearing assembly 23, an oil filling hole 24, an oil drain hole 25 and an injection hole 26;
the injection hole 26 is arranged above the bearing seat 21 and is communicated with the oil chamber 22;
a bearing assembly 23 is disposed within the oil chamber 22;
the two oil holes 24 are arranged on two sides of the bearing seat 21 along the axial direction and are positioned above the main shaft 1;
the two oil drain holes 25 are arranged on two sides of the bearing seat 21 along the axial direction and are positioned below the main shaft 1;
the oil filler hole 24 is sealed by a seal;
the cleaning apparatus 3 includes a container 31, a pump 32, an input pipe 33, and an output pipe 34, one end of the input pipe 33 communicates with the container 31, and the other end of the input pipe 33 communicates with the injection hole 26; one end of the output pipe 34 is communicated with the container 31, the other end of the output pipe 34 is communicated with at least one oil drain hole 25, and the pump 32 is arranged on the input pipe 33.
Alternatively, there are two injection holes 26, and the distance between the two injection holes 26 is larger than the diameter of the main shaft 1.
Alternatively, the opening direction of the injection hole 26 is perpendicular to the axial direction of the spindle 1.
Optionally, one of the oil drain holes 25 is sealed by a seal.
Optionally, the sealing member is made of metal.
Optionally, the bearing assembly 23 includes a bearing 231 and rollers 232.
Alternatively, the opening directions of the oil filler holes 24 and the oil drain holes 25 are parallel to the axial direction of the main shaft 1.
Alternatively, pump 32 is a portable variable frequency pump.
Optionally, the container 31 contains a cleaning fluid or lubricating oil.
To achieve the above objective, an embodiment of a second aspect of the present application provides a method for cleaning a spindle bearing of a wind turbine, including:
s1, preparing before cleaning;
s2, dismantling an end cover;
s3, cleaning preparation work;
s4, cleaning;
s5, checking after cleaning;
s6, ending and recovering work.
Optionally, the preparation before cleaning includes:
and (3) turning the wind turbine into a maintenance state mode, locking a high-speed shaft brake of the wind turbine, locking an impeller brake of the wind turbine, and conveying required materials and tools into a cabin of the wind turbine through a lifting opening of the wind turbine.
Optionally, the end cap removing operation includes:
disassembling a main shaft bearing seat lock nut, an end cover and a sealing ring which are not in interference fit;
extracting an oil sample from the surface layer of the raceway in the 6 o' clock direction of the main shaft bearing, and carrying out metal component assay;
cleaning and wiping waste grease on the exposed end face of the bearing;
and measuring the assembly clearance between the rolling bodies of the main shaft bearing and the outer ring of the bearing by using a feeler gauge.
Optionally, the cleaning preparation comprises:
a main shaft bearing seat lock nut, an end cover and a sealing ring which are in non-interference fit are assembled;
an external sealing device is selected according to the form of sealing rings assembled at the two ends of a main shaft bearing seat of the wind turbine generator;
placing cleaning equipment below a main shaft, injecting solvent type cleaning agent into a container of the cleaning equipment, and installing an outlet pipeline of the cleaning equipment at two radial grease oil injection ports of a bearing seat to be used as the direction of the solvent type cleaning agent entering the bearing seat;
and a water return pipeline of the cleaning equipment is arranged at a single axial grease discharging port of the bearing seat and is used as a solvent type cleaning agent to flow back to the direction of the cleaning equipment container.
Optionally, the cleaning operation comprises:
starting the cleaning equipment, pouring the solvent type cleaning agent into the cavity of the bearing seat through the water injection port of the bearing seat, controlling the reflux speed of the solvent type cleaning agent through the reflux ball valve, and ensuring that the flow rate of the injected solvent type cleaning agent is higher than the reflux flow rate.
Optionally, the method further comprises:
before the solvent-type cleaning agent is poured into the bearing seat cavity through the water injection port of the bearing seat, the solvent-type cleaning agent is heated to a preset temperature interval.
Optionally, the method further comprises:
and (3) soaking and cleaning the main shaft bearing, wherein the soaking and cleaning further comprises the step of filling the bearing seat with a solvent type cleaning agent and soaking for a preset period of time.
Optionally, the method further comprises:
after the main shaft bearing is soaked and cleaned, the main shaft bearing is circularly cleaned.
Optionally, the post-cleaning inspection operation includes:
disassembling a main shaft bearing seat lock nut, an end cover and a sealing ring which are not in interference fit;
and checking the cleaning effect of the bearing and the end cover in the main shaft cavity, and blowing air to the end face of the main shaft bearing by using an air pump.
Optionally, the ending and recovering operations include:
a main shaft bearing seat lock nut, an end cover and a sealing ring which are in non-interference fit are assembled;
grease injection lubrication is carried out on the main shaft bearing;
removing the external sealing device;
and starting the wind turbine generator.
Optionally, the method further comprises:
s7, evaluating and checking and accepting after cleaning.
Optionally, the post-cleaning evaluation and acceptance work includes:
extracting lubricating grease, carrying out component assay, and confirming the residual life cycle of the main shaft bearing according to the assay result;
checking whether the sealing positions at the two ends of the main shaft bearing seat have a phenomenon of grease overflow or a phenomenon of falling off of a sealing ring;
determining whether the cleaning is effective by monitoring the temperature conditions before and after the cleaning of the main shaft bearing;
whether the cleaning is effective is determined by vibration detection.
According to the cleaning device and method for the main shaft bearing of the wind turbine generator, the following technical effects can be achieved:
1. by means of cleaning, the severe lubrication environment of the bearing seat chamber is optimized. The original lubrication oiling direction of the main bearing is changed, the axial indirect lubrication is changed into the radial direct lubrication mode lubrication, the problem of insufficient design of the oiling direction is solved, the lubrication environment of the bearing is improved, hardening saponification of lubricating grease in an oil cavity chamber is effectively avoided, and damage and failure of the bearing caused by unsmooth circulation of the lubricating oil are avoided, so that serious faults of the wind turbine generator are avoided. Meanwhile, the running reliability and stability of the main shaft bearing of the wind turbine generator can be guaranteed, and the maintenance cost investment is effectively reduced.
2. Based on original radial oiling route, through radial direct injection washing liquid's mode, wash the solution to oil pocket waste oil to thoroughly dredge the oil drain hole, effectively realized the clearance that oil pocket lubricating grease formed the board saponification, thereby can reduce the probability of occurrence that the drive chain moved backward because of the bearing inefficacy to a great extent, and then avoided wind turbine generator system to appear serious trouble.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic diagram of a prior art structure;
FIG. 2 shows a schematic structural diagram of a cleaning device for a main shaft bearing of a wind turbine according to an embodiment;
FIG. 3 illustrates a top view of a cleaning water injection hole of a wind turbine main shaft bearing according to one embodiment;
FIG. 4 illustrates a flow chart of a method of cleaning a wind turbine main shaft bearing according to one embodiment;
FIG. 5 illustrates a flow chart of an end cap removal operation of one embodiment;
FIG. 6 illustrates a flow chart of a cleaning preparation operation of one embodiment;
FIG. 7 illustrates a flow diagram of the finalization and resume work of an embodiment;
FIG. 8 shows a flow chart of a method of cleaning a wind turbine main shaft bearing according to another embodiment.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The invention is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the invention as claimed.
The following describes a cleaning device and a cleaning method for a main shaft bearing of a wind turbine generator according to an embodiment of the present application with reference to the accompanying drawings.
Fig. 2 is a schematic structural diagram of a cleaning device for a spindle bearing of a wind turbine according to an embodiment of the present application.
As shown in fig. 2, the cleaning device for a main shaft bearing of a wind turbine generator includes: comprising a main shaft 1, an end cap 2 arranged around the main shaft 1 and a cleaning device 3.
As shown in fig. 2, the end cap 2 may include a bearing housing 21, an oil chamber 22, a bearing assembly 23, an oil injection hole 24, an oil drain hole 25, and an injection hole 26.
Further, as shown in fig. 3, an injection hole 26 is provided above the bearing housing 21 to communicate with the oil chamber 22, thereby realizing the injection of the solvent type cleaning liquid through the injection hole 26 to realize the dissolution of the waste oil in the bearing housing chamber, thereby realizing the lubrication environment optimization. When the original lubricating oil injection direction of the main bearing is changed, the axial indirect lubrication is changed into the radial direct lubrication mode, hardening and saponification of lubricating grease in the oil chamber 22 and blockage of the oil injection hole 24 and the oil discharge hole 25 caused by the hardening and saponification are avoided, so that the lubricating oil can smoothly enter and exit, and the direct lubrication of the bearings is realized on two sides of the main shaft 1. In addition, cleaning fluid can be input through the injection hole 26, waste oil in the cavity is cleaned through harmless cleaning, poor lubrication environment of the bearing is solved, and the main bearing failure risk caused by poor lubrication environment and serious faults caused by the poor lubrication environment are avoided.
In one embodiment, the number of the injection holes 26 is two, and the distance between the two injection holes 26 is larger than the diameter of the main shaft 1, thereby ensuring sufficient injection of the cleaning liquid or the lubricating oil, and simultaneously avoiding leakage of the cleaning liquid or the lubricating oil flowing from the injection holes 26 into the main shaft 1 and avoiding influence on parts and normal operation of the main shaft 1.
In one embodiment, the opening direction of the injection hole 26 is perpendicular to the axial direction of the spindle 1. For example, when the main shaft 1 is horizontally placed, the opening direction of the injection hole 26 is the vertical direction, so that the cleaning liquid or lubricating oil can enter the oil chamber 22 through the injection hole 26 quickly and efficiently, the bearing assembly 23 is cleaned or lubricated, and the problem of grease residue in the injection process and the problem of blockage caused by the grease residue are effectively avoided.
Further, as shown in fig. 2, a bearing assembly 23 is disposed within the oil chamber 22;
in one particular embodiment, the bearing assembly 23 includes a bearing 231 and rollers 232. Since the bearings 231 and the rollers 232 in the bearing assembly 23 are of a split design, it is necessary to clean the hardened and saponified grease or lubrication between the two by changing the direction of the flow of the lubricating or cleaning fluid.
Further, the oil holes 24 are provided in two and on both sides of the bearing housing 21 in the axial direction above the main shaft 1. Further, two oil drain holes 25 are provided on both sides of the bearing housing 21 in the axial direction, below the main shaft 1.
In one embodiment, the opening directions of the oil filling hole 24 and the oil discharge hole 25 are parallel to the axial direction of the main shaft 1. Therefore, the problem of insufficient design of the oiling direction of the bearing lubrication system can cause grease residue in the discharging process and blockage caused by the grease residue, so that the cleaning or lubrication of the system needs to be realized by changing the flowing direction of cleaning liquid or lubricating oil.
Further, the oil filling hole 24 is sealed by a sealing element, so that the injection direction of the original lubricating oil or cleaning liquid of the main bearing 1 is changed, the axial indirect injection is changed into the radial direct injection mode, the poor lubrication environment of the bearing is solved, and meanwhile, the hardened and saponified lubricating grease in the oil chamber 22 is cleaned, so that the failure risk of the main bearing is reduced.
In one embodiment, one of the oil drain holes 25 is sealed by a special skeleton seal or hoop seal, thereby realizing convergence of an oil drain path, draining and cleaning the cleaned or lubricated cleaning fluid or lubricating oil in the oil chamber 22 from a unified outlet, realizing full lubrication of the bearing assembly 23 in the oil chamber 22, harmless cleaning and dissolving of waste oil, and thoroughly dredging the oil drain hole 25.
In one embodiment, the seal is made of a metal seal.
Specifically, the metal sealing member can be tightly attached to the device, so that the sealing stability of the oil drain hole 25 is ensured, the flow direction of cleaning liquid or lubricating oil in the cleaning or lubricating process is ensured, and the smoothness and stability of the waste oil outflow process are ensured.
The cleaning device 3 comprises a container 31, a pump 32, an inlet conduit 33 and an outlet conduit 34. Wherein one end of the input pipe 33 communicates with the container 31, and the other end of the input pipe 33 communicates with the injection hole 26. Meanwhile, one end of the output pipe 34 is connected to the container 31, the other end of the output pipe 34 is connected to the at least one oil drain hole 25, and the pump 32 is provided on the input pipe 33.
Thereby, the cleaning liquid or the lubricating oil is injected from the container 31 to the injection hole 26 through the input pipe 33 based on the power generated by the pump 32 of the cleaning apparatus 3. When the lubricating oil is injected, the process lubricates the bearing assembly 23 by injecting the lubricating oil into the oil chamber 22, and then discharges the waste oil into the output pipeline 34 through the unified oil drain hole 25, thereby realizing the lubrication of the main shaft bearing of the wind turbine generator and avoiding the accumulation of the waste oil. When the cleaning liquid is injected, the process cleans and dissolves the deposited waste oil in the oil chamber 22 through a harmless cleaning path, and simultaneously thoroughly dredges the oil drain hole 25.
In one embodiment, the pump 32 is a portable variable frequency pump, so that the flow rate and the speed of the lubricating oil or the cleaning liquid can be adjusted according to the condition of the main shaft bearing of the wind turbine generator, and the pump can be flexibly applied to various lubrication and cleaning requirement scenes of the main shaft bearing of the wind turbine generator.
According to the cleaning device for the main shaft bearing of the wind turbine generator, the following technical effects can be achieved:
and 1, dissolving waste oil of the bearing pedestal through solvent type cleaning liquid, so that the lubrication environment of a bearing chamber is optimized, and the service life of the bearing on the wind turbine generator is prolonged. The original lubrication oiling direction of the main bearing is changed, the axial indirect lubrication is changed into the radial direct lubrication mode lubrication, the problem of insufficient design of the oiling direction is solved, the lubrication environment of the bearing is improved, hardening saponification of lubricating grease in an oil cavity chamber is effectively avoided, and bearing damage and failure caused by unsmooth circulation of the lubricating oil are avoided, so that serious faults of the wind turbine generator are avoided. Meanwhile, the running reliability and stability of the main shaft bearing of the wind turbine generator can be guaranteed, and the maintenance cost investment is effectively reduced.
2 based on original radial oiling route, through radial direct injection washing liquid's mode, wash the solution to oil pocket waste oil to thoroughly dredge the oil drain hole, effectively realized the clearance that oil pocket lubricating grease formed the board saponification, thereby can reduce the probability of occurrence that the drive chain moved backward because of the bearing inefficacy to a great extent, and then avoided wind turbine generator system to appear serious trouble.
And 3, the device can be flexibly applied to main shafts, variable paddles and yaw systems in the existing wind turbine generator, the running efficiency of the bearing of the wind turbine generator which has not failed can be improved only by simple technical improvement, the cleaning treatment of the wind turbine generator which has failed in a transmission chain can be realized, the device has the technical transplanting application value of various types, and the cost expenditure of equipment replacement can be effectively reduced.
In order to achieve the above purpose, the application provides a method for cleaning a main shaft bearing of a wind turbine generator.
The cleaning and lubricating path optimization and reconstruction operation of the main shaft bearing of the wind turbine generator has irreversible working properties, so the whole process needs to be completed continuously.
Fig. 4 is a flowchart of a method for cleaning a spindle bearing of a wind turbine according to an embodiment of the present application.
As shown in fig. 4, the method for cleaning the main shaft bearing of the wind turbine generator comprises the following steps:
s1, preparing before cleaning.
Specifically, the wind turbine generator can be switched into a maintenance state mode, the high-speed shaft brake of the wind turbine generator is locked, the impeller brake of the wind turbine generator is locked, and required materials and tools are transported into a cabin of the wind turbine generator through a lifting opening of the wind turbine generator.
S2, dismantling the end cover.
Specifically, as shown in fig. 5, the end cap removing operation may include the following steps:
s21, removing the non-interference fit spindle bearing seat lock nut, the end cover and the sealing ring.
S22, extracting an oil sample from the surface layer of the raceway of the main shaft bearing in the 6 o' clock direction, and testing the metal components.
Wherein, the main test index is the element ratio of Fe to Cu.
S23, cleaning and wiping the waste grease on the exposed end face of the bearing.
Cleaning the waste grease on the exposed end face of the bearing, then visually inspecting the rolling bodies, the inner ring, the outer ring, the retainer and the like of the bearing, and judging whether the cleaning condition is met or not according to the peeling, damage and pitting conditions of the bearing metal.
And S24, measuring the assembly clearance between the rolling bodies of the main shaft bearing and the bearing outer ring by using a clearance gauge.
It is checked whether the play value satisfies the interval of 0.138mm-0.402mm of the design value.
S3, cleaning preparation work.
Specifically, as shown in fig. 6, the cleaning preparation may include the steps of:
s31, a non-interference fit spindle bearing seat lock nut, an end cover and a sealing ring are assembled.
S32, selecting an external sealing device according to the sealing ring forms assembled at the two ends of the main shaft bearing seat of the wind turbine.
If the V-shaped dustproof sealing ring is assembled in the prior art, the hoop type external sealing device is required to be additionally arranged. If the cloth clamping oil seal type sealing ring is assembled in the prior art, a framework type external sealing device is required to be assembled.
In order to ensure that liquid leakage cannot occur after liquid is injected into the cavity, an air pump is required to supply air into the cavity of the bearing seat, the air pressure maintaining capability of the cavity is ensured to meet 3bar, and the external seal is declared to be installed effectively.
S33, placing the cleaning equipment below the main shaft, injecting solvent type cleaning agent into a container of the cleaning equipment, and installing an outlet pipeline of the cleaning equipment at two radial grease oil injection ports of the bearing seat to serve as the direction of the solvent type cleaning agent entering the bearing seat.
Injecting 30L solvent-type cleaning agent into a container of the cleaning equipment, installing an outlet pipeline of the cleaning equipment at two radial grease oil injection ports of the bearing seat, and taking the position as the direction of the solvent-type cleaning agent entering the bearing seat. The water return pipeline of the cleaning equipment is arranged at the position of the single axial grease discharging port of the bearing seat, and the position is used as the direction of the solvent type cleaning agent to return to the container of the cleaning equipment.
And S34, installing a water return pipeline of the cleaning equipment at a single axial grease discharging port of the bearing seat, and taking the water return pipeline as a direction of returning the solvent type cleaning agent to a container of the cleaning equipment.
S4, cleaning.
Specifically, the cleaning equipment can be started, the solvent type cleaning agent is poured into the cavity of the bearing seat through the water injection port of the bearing seat, the backflow speed of the solvent type cleaning agent is controlled through the backflow ball valve, the injected solvent type cleaning agent flow rate is ensured to be higher than the backflow flow rate, and the solvent type cleaning agent is gradually filled into the cavity of the bearing seat.
In addition, the solvent-type cleaning agent can be heated to a preset temperature range. For example, if the cleaning apparatus has a heating function, the solvent-type cleaning agent may be heated to 20-40 ℃ using the heating function.
If the cleaning is the first time, the solvent type cleaning agent is needed to dredge the oil drain hole of the bearing seat cavity, and the oil return pipeline is cleaned together, so that the returned cleaning agent is ensured to be unobstructed. The method is characterized in that a filter screen is required to be used for filtering in the first cleaning process, the filter screen is cleaned in time to prevent blockage, after the solvent type cleaning agent is washed to be viscous, the originally injected 30L solvent type cleaning agent is emptied and poured into a containing container of the waste cleaning agent, and air is injected from an oil injection hole by using an air pump to assist the solvent type cleaning agent to be thoroughly discharged.
In one embodiment, the cleaning operation further comprises a soaking cleaning of the spindle bearing.
Specifically, the bearing seat may be filled with a solvent type cleaning agent and soaked for a predetermined period of time.
For example, a second injection of 30L of solvent-based cleaning agent into the cleaning apparatus is performed, the apparatus is started to fill the entire bearing housing with solvent-based cleaning agent, and the entire bearing housing is immersed for 6 to 12 hours. At this time, in order to achieve the effect of liquid soaking after the solvent-type cleaning agent is injected into the bearing seat, the impeller brake is released to enable the solvent-type cleaning agent to freely rotate, so that the solvent-type cleaning agent and waste oil in the cavity can be fully mixed and the chemical reaction effect is quickened, and the cleaning effect is optimized by utilizing the characteristics of low surface tension, low viscosity and high permeability of the solvent-type cleaning agent.
In one embodiment, the cleaning operation further comprises a cyclical cleaning.
After the main shaft bearing is soaked and cleaned, the main shaft bearing can be circularly cleaned.
After the soaking and cleaning are finished, the secondarily injected 30L solvent-based cleaning agent is emptied and poured into a containing container of the waste cleaning agent, the 30L solvent-based cleaning agent is injected again for soaking for 1 hour, and the impeller brake is locked after the soaking is finished. Starting the cleaning equipment, starting a liquid circulation cleaning process for 3 hours, closely observing the viscosity of waste grease on the filter in the cleaning process, and if the viscosity of the waste grease is high or the color of the cleaning agent is turbid, emptying the injected 30L solvent-type cleaning agent again, and injecting the 30L solvent-type cleaning agent for the last time. The circulation cleaning operation can not be stopped until the discharged solvent-type cleaning agent is in a transparent state. The maximum usage amount of the cleaning agent is controlled to be 150L within 36 hours in the whole operation process.
S5, checking after cleaning.
Specifically, the lock nut, the end cover and the sealing ring of the main shaft bearing seat which are not in interference fit can be removed, then the cleaning effect of the bearing and the end cover in the main shaft cavity can be visually inspected or endoscopically inspected, and the air pump is used for blowing air to the end face of the main shaft bearing, so that the residual cleaning agent in the cavity can be volatilized quickly.
S6, ending and recovering work.
Specifically, the ending and recovering operations as shown in fig. 7 may include the following steps:
s61, a non-interference fit spindle bearing seat lock nut, an end cover and a sealing ring are installed back.
And S62, grease injection lubrication is carried out on the main shaft bearing.
And the used lubricating grease has the specification and model consistent with those of the prototype, and the bearing is subjected to grease injection lubrication. The lubrication amount should meet 70% of the free space of the bearing seat cavity or the injection amount standard according to the maintenance requirement of a fan manufacturer.
S63, removing the external sealing device.
And removing the hoop type or skeleton type sealing device.
S64, starting the wind turbine generator.
In another embodiment of the present application, as shown in fig. 8, further includes:
s7, evaluating and checking and accepting after cleaning.
Specifically, four ways may be included:
1. the lubricating grease can be extracted, the composition is tested, and the residual life cycle of the main shaft bearing is confirmed according to the test result. For example, after the operation expires for 3 months, the lock nut, the end cover and the sealing ring of the main shaft bearing seat which are not in interference fit are detached, an oil sample is extracted from the surface layer of the raceway in the direction of 6 o' clock of the bearing, and the metal component is tested, and the main test index is the ratio of Fe to Cu. And analyzing the residual life cycle of the bearing according to the change trend of the index of the metal element of the grease after the bearing is cleaned. And the original appearance of the wind turbine generator set should be restored immediately after sampling.
2. It can check whether the sealing positions at the two ends of the main shaft bearing seat have the phenomenon of grease overflow or the phenomenon of falling off of the sealing ring, if so, the defect should be eliminated in time.
3. The cleaning efficiency can be determined by monitoring the temperature conditions before and after the cleaning of the main shaft bearing.
4. Vibration detection may be used to analyze the vibration time domain waveform to determine if cleaning is effective.
The cleaning method for the main shaft bearing of the wind turbine generator provided by the embodiment of the application can achieve the following technical effects:
1. the solvent type cleaning liquid is used for dissolving waste oil of the bearing pedestal, so that the lubrication environment of the bearing chamber is optimized, and the service life of the bearing on the wind turbine generator is prolonged. The original lubrication oiling direction of the main bearing is changed, the axial indirect lubrication is changed into the radial direct lubrication mode lubrication, the problem of insufficient design of the oiling direction is solved, the lubrication environment of the bearing is improved, hardening saponification of lubricating grease in an oil cavity chamber is effectively avoided, and bearing damage and failure caused by unsmooth circulation of the lubricating oil are avoided, so that serious faults of the wind turbine generator are avoided. Meanwhile, the running reliability and stability of the main shaft bearing of the wind turbine generator can be guaranteed, and the maintenance cost investment is effectively reduced.
2. Based on original radial oiling route, through radial direct injection washing liquid's mode, wash the solution to oil pocket waste oil to thoroughly dredge the oil drain hole, effectively realized the clearance that oil pocket lubricating grease formed the board saponification, thereby can reduce the probability of occurrence that the drive chain moved backward because of the bearing inefficacy to a great extent, and then avoided wind turbine generator system to appear serious trouble.
3. The device can be flexibly applied to main shafts, variable paddles and yaw systems in the existing wind turbine generator, can improve the running efficiency of bearings of the wind turbine generator which do not have faults and clean the wind turbine generator which have transmission chains, has the technical transplanting application value of various types, and can effectively reduce the cost of equipment replacement.
The above embodiments are merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to apply to the present invention, and all equivalents and modifications according to the technical scheme and the inventive concept thereof are intended to be included in the scope of the present invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It should be noted that in the description of the present specification, descriptions of terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Claims (21)
1. The cleaning device for the main shaft bearing of the wind turbine generator is characterized by comprising a main shaft (1), an end cover (2) arranged around the main shaft (1) and cleaning equipment (3),
the end cover (2) comprises a bearing seat (21), an oil cavity (22), a bearing assembly (23), an oil injection hole (24), an oil drain hole (25) and an injection hole (26);
the injection hole (26) is arranged above the bearing seat (21) and is communicated with the oil chamber (22);
-the bearing assembly (23) is arranged within the oil chamber (22);
the number of the oil holes (24) is two, and the oil holes are arranged on two sides of the bearing seat (21) along the axial direction and are positioned above the main shaft (1);
the number of the oil drain holes (25) is two, and the oil drain holes are arranged on two sides of the bearing seat (21) along the axial direction and are positioned below the main shaft (1);
the oil filling hole (24) is sealed by a sealing piece;
the cleaning device (3) comprises a container (31), a pump (32), an input pipeline (33) and an output pipeline (34), wherein one end of the input pipeline (33) is communicated with the container (31), and the other end of the input pipeline (33) is communicated with the injection hole (26); one end of the output pipeline (34) is communicated with the container (31), the other end of the output pipeline (34) is communicated with at least one oil drain hole (25), and the pump (32) is arranged on the input pipeline (33).
2. A cleaning device for a main shaft bearing of a wind turbine according to claim 1, characterized in that there are two injection holes (26), and the distance between two injection holes (26) is larger than the diameter of the main shaft (1).
3. A cleaning device for spindle bearings according to claim 1 or 2, characterized in that the opening direction of the injection hole (26) is perpendicular to the axial direction of the spindle (1).
4. A cleaning device for spindle bearings according to claim 1, characterized in that one of the oil drain holes (25) is sealed by means of the seal.
5. The apparatus according to claim 1 or 4, wherein the sealing member is made of metal or epoxy resin.
6. A cleaning device for spindle bearings according to claim 1, characterized in that the bearing assembly (23) comprises a bearing (231) and rollers (232).
7. A cleaning device for spindle bearings according to claim 1, characterized in that the directions of the openings of the oil filler holes (24) and the oil drain holes (25) are parallel to the axial direction of the spindle (1).
8. A spindle bearing cleaning apparatus according to claim 1, characterized in that the pump (32) is a portable variable frequency pump.
9. A cleaning device for spindle bearings according to claim 1, characterized in that the container (31) contains cleaning liquid or lubricating oil.
10. The method for cleaning the main shaft bearing of the wind turbine generator is characterized by comprising the following steps of:
s1, preparing before cleaning;
s2, dismantling an end cover;
s3, cleaning preparation work;
s4, cleaning;
s5, checking after cleaning;
s6, ending and recovering work.
11. The method of cleaning a spindle bearing as set forth in claim 10, wherein the pre-cleaning preparation includes:
and (3) turning the wind turbine into a maintenance state mode, locking a high-speed shaft brake of the wind turbine, locking an impeller brake of the wind turbine, and conveying required materials and tools into a cabin of the wind turbine through a lifting opening of the wind turbine.
12. The method of cleaning a spindle bearing as set forth in claim 10, wherein the end cap removal operation includes:
disassembling a main shaft bearing seat lock nut, an end cover and a sealing ring which are not in interference fit;
extracting an oil sample from the surface layer of the raceway in the 6 o' clock direction of the main shaft bearing, and carrying out metal component assay;
cleaning and wiping waste grease on the exposed end face of the bearing;
and measuring the assembly clearance between the rolling bodies of the main shaft bearing and the outer ring of the bearing by using a feeler gauge.
13. The method of cleaning a spindle bearing as set forth in claim 10, wherein the cleaning preparation includes:
a main shaft bearing seat lock nut, an end cover and a sealing ring which are in non-interference fit are assembled;
an external sealing device is selected according to the form of sealing rings assembled at the two ends of a main shaft bearing seat of the wind turbine generator;
placing cleaning equipment below a main shaft, injecting solvent type cleaning agent into a container of the cleaning equipment, and installing an outlet pipeline of the cleaning equipment at two radial grease oil injection ports of a bearing seat to be used as the direction of the solvent type cleaning agent entering the bearing seat;
and a water return pipeline of the cleaning equipment is arranged at a single axial grease discharging port of the bearing seat and is used as a solvent type cleaning agent to flow back to the direction of the cleaning equipment container.
14. The method of cleaning a spindle bearing as set forth in claim 10, wherein the cleaning operation includes:
starting the cleaning equipment, pouring the solvent type cleaning agent into the cavity of the bearing seat through the water injection port of the bearing seat, controlling the reflux speed of the solvent type cleaning agent through the reflux ball valve, and ensuring that the flow rate of the injected solvent type cleaning agent is higher than the reflux flow rate.
15. The method of cleaning a spindle bearing as recited in claim 14, further comprising:
before the solvent-type cleaning agent is poured into the bearing seat cavity through the water injection port of the bearing seat, the solvent-type cleaning agent is heated to a preset temperature interval.
16. The method of cleaning a spindle bearing as recited in claim 14, further comprising:
and (3) soaking and cleaning the main shaft bearing, wherein the soaking and cleaning further comprises the step of filling the bearing seat with a solvent type cleaning agent and soaking for a preset period of time.
17. The method of cleaning a spindle bearing as recited in claim 16, further comprising, after the immersing and cleaning of the spindle bearing:
and (5) circularly cleaning the main shaft bearing.
18. The method of cleaning a spindle bearing as set forth in claim 10, wherein the post-cleaning inspection operation includes:
disassembling a main shaft bearing seat lock nut, an end cover and a sealing ring which are not in interference fit;
and checking the cleaning effect of the bearing and the end cover in the main shaft cavity, and blowing air to the end face of the main shaft bearing by using an air pump.
19. The method of cleaning a spindle bearing as set forth in claim 10, wherein the ending and restoring operations include:
a main shaft bearing seat lock nut, an end cover and a sealing ring which are in non-interference fit are assembled;
grease injection lubrication is carried out on the main shaft bearing;
removing the external sealing device;
and starting the wind turbine generator.
20. The method of cleaning a spindle bearing as recited in claim 10, further comprising:
s7, evaluating and checking and accepting after cleaning.
21. The method of cleaning a spindle bearing as recited in claim 20, wherein the post-cleaning evaluation and acceptance operation comprises:
extracting lubricating grease, carrying out component assay, and confirming the residual life cycle of the main shaft bearing according to the assay result;
checking whether the sealing positions at the two ends of the main shaft bearing seat have a phenomenon of grease overflow or a phenomenon of falling off of a sealing ring;
determining whether the cleaning is effective by monitoring the temperature conditions before and after the cleaning of the main shaft bearing;
whether the cleaning is effective is determined by vibration detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310034010.6A CN116116802A (en) | 2023-01-10 | 2023-01-10 | Cleaning device and method for main shaft bearing of wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310034010.6A CN116116802A (en) | 2023-01-10 | 2023-01-10 | Cleaning device and method for main shaft bearing of wind turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116116802A true CN116116802A (en) | 2023-05-16 |
Family
ID=86307607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310034010.6A Pending CN116116802A (en) | 2023-01-10 | 2023-01-10 | Cleaning device and method for main shaft bearing of wind turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116116802A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117006163A (en) * | 2023-09-12 | 2023-11-07 | 江苏六道重工有限公司 | Bearing pedestal and sliding shaft sleeve mechanism |
-
2023
- 2023-01-10 CN CN202310034010.6A patent/CN116116802A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117006163A (en) * | 2023-09-12 | 2023-11-07 | 江苏六道重工有限公司 | Bearing pedestal and sliding shaft sleeve mechanism |
| CN117006163B (en) * | 2023-09-12 | 2024-02-23 | 江苏六道重工有限公司 | Bearing pedestal and sliding shaft sleeve mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201779247U (en) | Gearbox off-line cleaning system | |
| CN116116802A (en) | Cleaning device and method for main shaft bearing of wind turbine generator | |
| CN206299775U (en) | A kind of environmentally friendly high accuracy wind field gear-box oil changing device | |
| CN104653296B (en) | Automation water wash system for gas-turbine unit | |
| US11685062B2 (en) | Oil-lubricated kinematic module connecting system, mainly the transmission or bearing modules of industrial robot; method of kinematic module lubrication | |
| CN207882268U (en) | Lubricating oil detecting and controlling system | |
| CN205936718U (en) | Take backwash function's turbo generator set oil cleaning system | |
| CN101709775B (en) | Method for removing blockage of oil duct of oil pumping unit reduction gearbox | |
| CN115931347A (en) | Oil circuit circulation life acceleration test system for oil bath lubrication bearing | |
| CN204847191U (en) | Bearing lubricating structure and screw conveyer | |
| CN209326975U (en) | A kind of centrifuger differential mechanism experimental rig | |
| CN211038892U (en) | Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine | |
| JP2002122520A (en) | Test rig and particulate deposit and cleaning evaluation method using the same | |
| CN219378162U (en) | Bearing inner grease cleaning equipment | |
| CN206112021U (en) | Wind generator set gearbox box of toper bottom plate oil extraction | |
| CN202419106U (en) | Lubricating oil lubrication system for diesel main engine | |
| CN109027204A (en) | A kind of monitoring of wind turbine gearbox solid particle, filtering and rinse-system | |
| CN219159089U (en) | Oil stain prevention device for guide bearing of hydroelectric generating set | |
| CN205841682U (en) | A kind of separate type wind-driven generator group wheel box casing | |
| CN111271139A (en) | Method for flushing pipeline of turbine lubricating oil system | |
| CN114893334B (en) | Method and device for determining sealing water leakage of main shaft of water turbine | |
| CN213574668U (en) | Long-shaft submerged pump with self-checking function | |
| JP2003534894A (en) | Method and apparatus for performing a cleanliness inspection of a final gearbox assembly | |
| CN205806399U (en) | A kind of wind-driven generator group wheel box body structure of the different thorough oil extraction of base plate | |
| Fuster et al. | Abductive diagnostic procedure based on an AND/OR/NOT graph for expected behaviour: Application to a gas turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |