CN113137349B - Main bearing grease replacing method for fan drive chain - Google Patents
Main bearing grease replacing method for fan drive chain Download PDFInfo
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- CN113137349B CN113137349B CN202110465665.XA CN202110465665A CN113137349B CN 113137349 B CN113137349 B CN 113137349B CN 202110465665 A CN202110465665 A CN 202110465665A CN 113137349 B CN113137349 B CN 113137349B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/70—Bearing or lubricating arrangements
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- 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
Abstract
The invention provides a main bearing grease replacing method for a fan driving chain, which comprises the steps of cleaning old grease in a cavity of a bearing seat close to a side of a gear box, injecting new grease into the cavity of the gear box side, injecting new grease into the cavity of the bearing seat in a turning state, mixing the new grease and the old grease in the cavity of the side far away from the gear box, washing away most of the new and old mixed grease in the cavity of the side far away from the gear box through the injected new grease, injecting new grease again in the turning state, uniformly mixing the new grease and the old grease, discharging the new grease and the old grease, injecting the new grease for multiple times, uniformly mixing the new grease and the old grease, discharging the discharged grease, and finishing the cleaning of the old grease. The discharged old grease needs to be weighed in the whole process, so that the difference between the total grease filling amount and the total grease discharging amount is small. The invention changes the grease of the main bearing by grease injection and grease discharge methods, can reduce the damage of a bearing oil film to the maximum extent, improves the lubricating environment of the main bearing and prolongs the service life of the main bearing.
Description
Technical Field
The invention relates to the technical field of a driving chain system of a wind driven generator, in particular to a method for replacing grease of a main bearing of a fan driving chain.
Background
In a wind turbine generator system, a main shaft of a drive chain plays a role in supporting a hub and blades and transmitting torque and rotation speed. The main bearing is used as a support and rotating component of the main shaft, and the performance of the main bearing not only determines the transmission efficiency of the drive chain, but also determines the operation and maintenance cost of the drive chain. In the drive train configuration, two-point and three-point supports are more common. In the two-point support type structure, the main shaft is supported by the double main bearings, and in the three-point support type structure, the main shaft is supported by the single main bearing. No matter the two-point support or the three-point support is adopted, the inner ring of the main bearing is in interference fit with the main shaft, the outer ring is in clearance or transition fit with the bearing seat, the main bearing is arranged in the cavity of the bearing seat, and two sides of the main bearing are sealed by the bearing end covers. When the fan runs, lubricating grease is injected into the cavity of the bearing seat through the lubricating system by injecting the lubricating grease into the grease injection hole of the front bearing end cover or the grease injection hole of the bearing seat.
In the current lubrication system, under the influence of the ambient temperature, the viscosity of the grease, the operating temperature and the specific structure and position of the grease discharging hole, only part of old grease is discharged from the grease discharging hole of the bearing seat after new grease is injected from the grease injecting hole of the bearing seat. As the main shaft runs, bearing wear is increased, further resulting in increased metal content in the grease in the bearing housing. If old grease can not be discharged for a long time, the grease is inevitably aged, hardened, the main bearing is heated and the like, and then the lower tower and the main bearing of the driving chain are replaced, so that great economic loss is generated.
Disclosure of Invention
The invention aims to provide a method for replacing main bearing grease for a fan driving chain, which solves the problems of grease aging, hardening, influence on the service life of a main bearing and the like caused by the fact that old grease cannot be discharged for a long time in the prior art by replacing the old main bearing grease in a bearing seat cavity.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a main bearing grease replacement method for a fan drive chain comprises the following steps:
step S1, detaching a first end cover of the bearing seat close to the gear box side under the condition that the main shaft keeps static, and enabling the first end cover and the end surface of the bearing seat to keep a space for cleaning grease;
step S2, cleaning grease in a gear box side cavity of the bearing seat, collecting the grease by using a waste grease collecting container, and weighing and recording after cleaning;
step S3, a plurality of new grease with new weight is filled into a gear box side cavity of the bearing seat to ensure that a bearing roller and inner and outer ring raceways on the gear box side are full of grease, and then the first end cover is assembled on the bearing seat again;
step S4, in a turning state, filling a plurality of weights of new grease into the bearing seat cavity, discharging the grease through the grease discharging hole of the first end cover, collecting the grease by using the waste grease collecting container, and stopping turning and weighing for recording until the new grease is completely added and no grease is discharged;
step S5, sealing the grease discharging hole of the first end cover, and filling a plurality of weights of new grease into the bearing seat cavity again in the turning state; after new and old grease is uniformly mixed, opening grease discharging holes of the first end cover, discharging the grease through the grease discharging holes of the first end cover, collecting the grease by using a waste grease collecting container, stopping turning and weighing for recording until the new grease is added and no more grease is discharged;
and step S6, repeating step S5 until the discharged grease is no longer the color-changing grease, and ensuring that the difference between the total grease injection amount and the total grease discharge amount does not exceed a preset value.
Further, the method for replacing the grease of the main bearing of the fan drive chain comprises the step S7 of observing the color of the grease in the raceway of the bearing seat, and confirming that the grease replacement is completed if the color of the grease in the whole circle of the raceway is normal.
Further, in step S5, after the grease discharging hole of the first end cap is opened, a plurality of weights of new grease are again filled into the bearing seat cavity in the turning state, and the grease is discharged through the grease discharging hole of the first end cap;
or after the new and old grease are uniformly mixed, controlling the main bearing to run at full load, opening the grease discharging hole of the first end cover after the temperature of the grease is increased and the viscosity of the grease is reduced, and discharging the grease through the grease discharging hole of the first end cover.
Further, the steps S1-S6 are suitable for replacing the grease of the main bearing in the middle and later period of the wear of the main bearing.
Further, in the early stage of wear of the main bearing, the main bearing grease replacement method comprises the following steps:
and cleaning oil compatible with the lubricating grease of the main bearing is adopted, after the bearing seat cavity is cleaned for multiple times, the grease discharging hole of the first end cover is closed, and the amount of grease required by the operation of the main bearing is filled into the bearing seat cavity, so that grease replacement is completed.
Furthermore, a grease injection pump or a spray gun is adopted to inject new grease.
Furthermore, the fan driving chain comprises a single-bearing three-point type supporting driving chain and a double-bearing two-point type supporting driving chain.
Further, for the single-bearing three-point type supporting driving chain, new grease is filled into the cavity of the bearing seat through a bearing seat grease filling pipe; and for the double-bearing two-point type supporting driving chain, new grease is filled into the bearing seat cavity from a grease injection pipe at the bearing end cover.
Further, for the double-bearing two-point type supporting driving chain, an oil way distributor is adopted, and new grease is respectively filled into the front bearing seat cavity and the rear bearing seat cavity through multiple oil ways, or the front bearing seat cavity and the rear bearing seat cavity are filled with the new grease through the multiple oil ways simultaneously.
Compared with the prior art, the invention has the following advantages:
the method comprises the steps of cleaning old grease in a bearing seat close to a side cavity of a gear box, injecting new grease into the side cavity of the gear box, injecting new grease into the bearing seat cavity in a turning state, mixing the new grease far away from the side cavity of the gear box, flushing most of the new and old mixed grease far away from the side cavity of the gear box through the injected new grease, injecting new grease again in the turning state, uniformly mixing the new grease with the old grease, discharging the new grease, injecting the new grease for many times, uniformly mixing, discharging the new grease, and finally enabling the discharged grease not to change color any more, so that the old grease is cleaned. The discharged old grease needs to be weighed in the whole process so as to ensure that the difference between the total grease filling amount and the total grease discharging amount is not large. Therefore, the grease of the main bearing is replaced by the grease injection and removal method, so that the damage of a bearing oil film can be reduced to the maximum extent, the lubricating environment of the main bearing is effectively improved, the service life of the main bearing is prolonged, the operation and maintenance cost is reduced, and considerable economic benefits are brought to enterprises.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:
fig. 1 is a schematic flow chart of a main bearing grease replacement method for a fan drive chain according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dual-bearing two-point support driving chain according to an embodiment of the present invention;
FIG. 3 is a schematic view of grease injection of the front end cover of the front bearing seat;
FIG. 4 is a schematic illustration of grease removal from the rear end cap of the front bearing block.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
The method for replacing the grease of the main bearing for the fan drive chain provided by the embodiment of the invention can be suitable for a single-bearing three-point type support drive chain and a double-bearing two-point type support drive chain, and comprises the following steps as shown in figure 1:
step S1, detaching a first end cover of the bearing seat close to the gear box side under the condition that the main shaft keeps static, and enabling the first end cover and the end surface of the bearing seat to keep a space for cleaning grease;
step S2, cleaning grease in a gear box side cavity of the bearing seat, collecting the grease by using a waste grease collecting container, and weighing and recording after cleaning;
step S3, a plurality of new grease with new weight is filled into a gear box side cavity of the bearing seat to ensure that a bearing roller and inner and outer ring raceways on the gear box side are full of grease, and then the first end cover is assembled on the bearing seat again;
step S4, in a turning state, filling a plurality of weights of new grease into the bearing seat cavity, discharging the grease through the grease discharging hole of the first end cover, collecting the grease by using the waste grease collecting container, and stopping turning and weighing for recording until the new grease is completely added and no grease is discharged;
step S5, sealing the grease discharging hole of the first end cover, and filling a plurality of weights of new grease into the bearing seat cavity again in the turning state; after new and old grease is uniformly mixed, opening grease discharging holes of the first end cover, discharging the grease through the grease discharging holes of the first end cover, collecting the grease by using a waste grease collecting container, stopping turning and weighing for recording until the new grease is added and no more grease is discharged;
step S6, the step S5 is repeated until the difference between the total grease injection amount and the total grease discharge amount does not exceed a preset value, and the discharged grease is no longer color-changing grease.
Fig. 2 to 4 show a dual-bearing two-point support drive chain structure, and the present invention will be described below with reference to a dual-bearing two-point support drive chain, and it will be understood by those skilled in the art that the present invention is also applicable to a single-bearing three-point support drive chain, and the form of the main bearing includes, but is not limited to, SRB main bearing and TRB main bearing.
In step S1, the wind wheel lock disk 1 may be locked by the wind wheel lock 4, so that the main shaft 5 is kept in a stationary state. And then, a torque wrench is used for disassembling a rear end cover bolt of the front bearing seat 2, after the bolt is disassembled, the rear end cover is suspended by a chain block and axially moved, so that a space enough for cleaning grease is reserved between the rear end cover and the end surface of the bearing seat, and a sealing ring lip and the rear end cover are prevented from colliding with the metal surface of the main shaft in the moving process. It will be understood by those skilled in the art that the rear end cap is referred to herein as the "first end cap", i.e. the rear end cap of the front bearing housing 2 when the front bearing housing 2 is being greased, and the rear end cap of the rear bearing housing 3 when the rear bearing housing 3 is being greased. In the invention, the front bearing seat 2 and the rear bearing seat 3 can be simultaneously replaced by grease, or can be sequentially replaced. In this embodiment, only the front bearing seat is taken as an example for description, and the principle and operation of grease replacement for the rear bearing seat 3 are the same, and are not described in detail.
In step S2, only one end cap of the front bearing block 2 is removed, so that grease can be cleaned only in one cavity of the front bearing block 2 (i.e. the cavity on the side of the gear box), during the cleaning process, waste grease can be collected by using a waste grease collecting container, and after the cleaning process is completed, the waste grease in the container is weighed and recorded, wherein the purpose of weighing is to calculate the total grease output later, and it is necessary to ensure that the total grease injection amount is substantially equal to the total grease output amount.
In step S3, after the grease is cleaned, a plurality of new grease of a certain weight is injected into the gear box side cavity of the front bearing seat 2, so as to ensure that the bearing rollers and the inner and outer race raceways on the gear box side are filled with grease. The weight of the injected new grease can be based on the volume of the cavity in the bearing seat as the grease injection basis, for example, 20Kg, and can also be the same as the amount of the waste grease weighed in the step 2. Then the rear end cover is assembled on the front bearing seat 2 again, and the waste grease collecting container is connected with a grease discharging pipe of the rear end cover, and the grease discharging pipe is connected with a grease discharging hole. Specifically, a grease injection pump or a spray gun can be adopted when new grease is injected.
So far, only accomplished the change of the half old grease in the cavity of front bearing frame 2, still be full of old grease in the cavity to keeping away from the gear box side, consequently follow-up step is used for wasing another half old grease.
In step S4, the wind wheel lock 4 is unlocked, and the turning motor is started, so that the spindle is in a turning state (i.e., a low-speed running state). The turning is to drive the main shaft to rotate through a turning motor, and drive the main bearing to rotate through a rotating main shaft. Because the grease viscosity is higher, the injected new grease can be more uniformly guided to the cavity of the grease and the mixing of the new grease and the old grease through the jigger, meanwhile, because the temperature of the grease is increased due to the heat generated by the rotating friction in the bearing in the rotating process, because the grease viscosity is in inverse proportion to the temperature, the higher the operating temperature is, the lower the viscosity is, and the grease is more favorable for being discharged from the cavity of the bearing seat.
In the turning state, a plurality of weights of new grease, for example 35Kg, are filled into the cavity of the front bearing seat 2, and in the oil filling process, because of the turning state, the new grease washes the old grease, and the new grease and the old grease are mixed and then can be discharged through the grease discharging holes (namely the grease discharging holes at 3 points 9, the grease discharging holes at 6 points 11 and the grease discharging holes at 9 points 10) of the rear end cover. And the discharged grease is also collected through the waste grease collecting container, and after the new grease with a plurality of weights is added, the weight of the grease in the waste grease collecting container is weighed again after the old grease is not discharged any more. In this step, for the dual-bearing two-point type supporting driving chain, new grease can be filled into the cavity of the front bearing seat 2 from a grease filling pipe at the bearing end cover, for example, as shown in fig. 3, a grease filling pump is used to connect an oil way distributor, which is divided into three oil ways, which are respectively connected with three grease filling holes (i.e. a 0-point grease filling hole 6, a 3-point grease filling hole 8, and a 9-point grease filling hole 7, and new grease is filled from three positions at the same time, for the single-bearing three-point type supporting driving chain, new grease can be filled into the cavity of the bearing seat through the grease filling pipe of the bearing seat, which is not described herein again, for the dual-bearing two-point type driving chain, an oil way distributor can be used to respectively fill new grease into the cavity of the front bearing seat 2 and the cavity of the rear bearing seat 3 through multiple oil ways, or simultaneously fill new grease into the cavity of the front bearing seat 2 and the cavity of the rear bearing seat 3 through multiple oil ways, for example, the oil path distributor is divided into six oil paths, wherein three paths are connected with three positions of 0 point, 3 point and 9 point grease injection holes (namely grease injection holes 6, 8 and 7) of the front end cover of the front bearing seat 2, and the other three paths are connected with three positions of 0 point, 3 point and 9 point grease injection holes of the rear end cover of the rear bearing seat 3.
Up to this point, grease is injected and discharged for the first time through step S4, most of old grease in the cavity of the front bearing block 2 can be cleaned, and therefore, further cleaning is still required in subsequent steps.
In step S5, the grease discharging holes at 3 o ' clock, 6 o ' clock and 9 o ' clock of the rear end cap (i.e. the grease discharging holes at 3 o ' clock and 6 o ' clock 11 and 9 o ' clock 10) are first closed, and a plurality of weights of new grease, for example 35Kg, are again filled into the cavity of the front bearing seat 2 in the turning state, and since the grease discharging holes at 3 o ' clock, 6 o ' clock and 9 o ' clock of the rear end cap are blocked, the new grease and the old grease are uniformly mixed in the turning state. After the new and old grease is uniformly mixed, grease discharging holes at 3 points, 6 points and 9 points of the rear end cover are opened, so that the grease can be discharged through the grease discharging holes at 3 points, 6 points and 9 points of the rear end cover. One way to achieve this is to fill a few weights of new grease into the cavity of the front bearing seat 2 in the turning state again after the grease discharge holes at 3 o 'clock, 6 o' clock and 9 o 'clock of the rear end cover are opened, and discharge the grease through the grease discharge holes at 3 o' clock, 6 o 'clock and 9 o' clock of the rear end cover, that is, as in step S4. Another implementation mode is that after new and old grease are uniformly mixed, the main bearing is controlled to run at full load, after the temperature of the grease is increased and the viscosity of the grease is reduced, grease discharging holes at 3 points, 6 points and 9 points of the rear end cover are opened, and the grease is discharged through the grease discharging holes at 3 points, 6 points and 9 points of the rear end cover.
At this point, grease is injected and discharged for the second time through step S5, and grease in the cavity of the front bearing block 2 is further replaced.
In step S6, it may be first observed whether the color of the discharged grease is color-changing grease, if the old grease is completely discharged, the color of the discharged grease should be pure (e.g. yellow), otherwise, further cleaning is required, and step S5 is repeated to perform further cleaning, and oil is changed for multiple times until the discharged grease is no longer color-changing grease. In addition, it is ensured that the difference between the total fat injection amount and the total fat discharge amount does not exceed a preset value (e.g., 5%).
Further, the method of the present invention may further include step S7, observing the color of the grease in the raceway of the front bearing block 2, and if the color of the grease in the entire raceway is a normal color, confirming that the grease replacement is completed, thereby further confirming the replacement result. Specifically, after step S6, the endoscope is placed at the position 6 of the 0 point of the front end cover of the front bearing pedestal 2 and the position 12 of the 0 point of the rear end cover, the color of the grease in the raceway at this time is observed, the endoscope is taken out, the main bearing is rotated by the turning gear motor, the color of the grease in the raceway at this time is observed by the endoscope, and the completion of grease replacement is confirmed after the color of the grease in the whole circle of cavity is ensured to be a normal color.
Further, it can be understood that, because the main bearing is an important transmission component, abrasion inevitably occurs in the transmission process, and the abrasion is classified according to 500-3000ppm of Fe element in the grease, and can be divided into an early stage, a middle stage and a later stage. The method shown in the figure 1 is suitable for the middle and later periods with serious abrasion of the main bearing, namely the method is suitable for the phenomena that obvious peeling, cracks and the like can be seen on the raceway surfaces of the inner ring and the outer ring of the bearing seat and the rollers, the oil is obviously discolored, and the content of Fe element in the oil is obviously higher than that of the oil replacement scheme adopted by the standard of enterprises. Because the main bearing is worn at the middle and later stages, the internal structure of the bearing seat is damaged in a large area, the lubrication of the bearing body is poor, and the damage of a bearing oil film can be reduced to the maximum extent by a plurality of oil changing modes of grease injection and grease discharge, the lubrication condition of the main bearing is improved, and the service life is prolonged.
At the main bearing wearing and tearing earlier stage, accessible washing realizes that the grease changes with the mode of changing oil, and concrete implementation is as follows: cleaning oil compatible with main bearing lubricating grease is adopted, after the cavity of the front bearing seat 2 is cleaned for a plurality of times, grease discharging holes (namely 3-point grease discharging holes 9, 6-point grease discharging holes 11 and 9-point grease discharging holes 10) of the rear end cover are sealed, and the amount of grease required by the operation of the main bearing is filled into the cavity of the front bearing seat 2, so that grease replacement is completed. For example, after the unit normally operates for 3-5 years, the main bearing is observed to have no obvious abrasion through an endoscope, the content of Fe element in grease is within the range of 500ppm, only the abrasion of parts is caused by long unit operation time, at the moment, through a mode of cleaning and changing oil, although the oil film state of the bearing can be damaged in a short time, the bearing structure is good, the bearing damage can not be caused, meanwhile, the lubricating condition of the main bearing is improved, and the service life of the main bearing is further prolonged.
In summary, according to the method for replacing the grease of the main bearing for the fan drive chain provided by the invention, the old grease in the cavity of the bearing seat close to the side of the gear box is cleaned, the new grease is injected into the cavity of the bearing seat in the turning state, the new grease and the old grease in the cavity of the side far away from the gear box are mixed, most of the new and old mixed grease in the cavity of the side far away from the gear box is washed away by the injected new grease, then the new grease is injected again in the turning state, the new grease and the old grease are uniformly mixed and then discharged, the discharged grease is discharged after being uniformly mixed by injecting the new grease for multiple times, and finally the discharged grease is not discolored, and the cleaning of the old grease is completed. The discharged old grease needs to be weighed in the whole process so as to ensure that the difference between the total grease filling amount and the total grease discharging amount is not large. Therefore, the grease of the main bearing is replaced by the grease injection and removal method, so that the damage of a bearing oil film can be reduced to the maximum extent, the lubricating environment of the main bearing is effectively improved, the service life of the main bearing is prolonged, the operation and maintenance cost is reduced, and considerable economic benefits are brought to enterprises.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (9)
1. A method of replacing main bearing grease for a fan drive chain, comprising:
step S1, detaching a first end cover of the bearing seat close to the gear box side under the condition that the main shaft keeps static, and enabling the first end cover and the end surface of the bearing seat to keep a space for cleaning grease;
step S2, cleaning grease in a gear box side cavity of the bearing seat, collecting the grease by using a waste grease collecting container, and weighing and recording after cleaning;
step S3, a plurality of new grease with new weight is filled into a gear box side cavity of the bearing seat to ensure that a bearing roller and inner and outer ring raceways on the gear box side are full of grease, and then the first end cover is assembled on the bearing seat again;
step S4, in a turning state, filling a plurality of weights of new grease into the bearing seat cavity, discharging the grease through the grease discharging hole of the first end cover, collecting the grease by using the waste grease collecting container, and stopping turning and weighing for recording until the new grease is completely added and no grease is discharged;
step S5, sealing the grease discharging hole of the first end cover, and filling a plurality of weights of new grease into the bearing seat cavity again in the turning state; after new and old grease is uniformly mixed, opening grease discharging holes of the first end cover, discharging the grease through the grease discharging holes of the first end cover, collecting the grease by using a waste grease collecting container, stopping turning and weighing for recording until the new grease is added and no more grease is discharged; observing whether the color of the discharged grease is still discolored grease;
and step S6, if the color of the discharged grease is still the color-changing grease, repeating the step S5 until the discharged grease is no longer the color-changing grease, and ensuring that the difference between the total grease injection amount and the total grease discharge amount does not exceed a preset value.
2. The method for replacing the main bearing grease for the fan drive chain according to claim 1, further comprising a step S7 of observing the color of the grease in the bearing seat raceway and confirming that the grease replacement is completed if the color of the grease in the entire raceway is a normal color.
3. The method for replacing main bearing grease for a fan drive chain according to claim 1, wherein in step S5, after the grease discharge hole of the first end cover is opened, a plurality of weights of new grease are filled into the bearing seat cavity again in a turning state, and the grease is discharged through the grease discharge hole of the first end cover;
or after the new and old grease are uniformly mixed, controlling the main bearing to run at full load, opening the grease discharging hole of the first end cover after the temperature of the grease is increased and the viscosity of the grease is reduced, and discharging the grease through the grease discharging hole of the first end cover.
4. The method for replacing the main bearing grease for the fan drive chain according to claim 1, wherein the steps S1-S6 are suitable for replacing the main bearing grease in the middle and later period of wear of the main bearing.
5. The method of claim 4 for replacing main bearing grease for a fan drive chain, wherein the method of replacing main bearing grease comprises, prior to wear of the main bearing:
and cleaning oil compatible with the lubricating grease of the main bearing is adopted, after the bearing seat cavity is cleaned for multiple times, the grease discharging hole of the first end cover is closed, and the amount of grease required by the operation of the main bearing is filled into the bearing seat cavity, so that grease replacement is completed.
6. The method of replacing main bearing grease for a fan drive chain of claim 1 wherein a grease pump or gun is used to fill with new grease.
7. The method of claim 1, wherein the fan drive chain comprises a single bearing three point support drive chain and a dual bearing two point support drive chain.
8. The method for replacing the main bearing grease for the fan drive chain according to claim 7, wherein for the single-bearing three-point support drive chain, new grease is filled into the bearing seat cavity through a bearing seat grease filling pipe; and for the double-bearing two-point type supporting driving chain, new grease is filled into the bearing seat cavity from a grease injection pipe at the bearing end cover.
9. The method for replacing grease on a main bearing of a fan drive chain according to claim 7, wherein for the dual-bearing two-point type support drive chain, an oil way distributor is used to separately fill the front bearing seat cavity and the rear bearing seat cavity with new grease through multiple oil ways, or to simultaneously fill the front bearing seat cavity and the rear bearing seat cavity with new grease through multiple oil ways.
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| GB2382117B (en) * | 2001-10-05 | 2005-07-20 | Hansen Transmissions Int | Wind turbine gear unit lubrication |
| WO2011082836A1 (en) * | 2010-01-11 | 2011-07-14 | Siemens Aktiengesellschaft | Direct drive wind turbine with a cooling system |
| WO2017031327A1 (en) * | 2015-08-18 | 2017-02-23 | Fluitec International | System and method for extending the life of wind turbine gear box oil |
| CN208441975U (en) * | 2018-05-10 | 2019-01-29 | 国华巴彦淖尔（乌拉特中旗）风电有限公司 | The Wind turbines for having pitch variable bearings degras recycling and centralized lubrication function |
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