CN111765054A - Automatic lubrication method and controller for variable-pitch bearing of wind turbine generator - Google Patents
Automatic lubrication method and controller for variable-pitch bearing of wind turbine generator Download PDFInfo
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- CN111765054A CN111765054A CN202010663815.3A CN202010663815A CN111765054A CN 111765054 A CN111765054 A CN 111765054A CN 202010663815 A CN202010663815 A CN 202010663815A CN 111765054 A CN111765054 A CN 111765054A
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- 238000005461 lubrication Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000004519 grease Substances 0.000 claims abstract description 176
- 238000002347 injection Methods 0.000 claims abstract description 119
- 239000007924 injection Substances 0.000 claims abstract description 119
- 230000001050 lubricating effect Effects 0.000 claims abstract description 65
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000013589 supplement Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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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- 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
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
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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 discloses an automatic lubrication method and a controller for a variable-pitch bearing of a wind turbine generator, and relates to the technical field of wind turbine generator lubrication. The method comprises the following steps: determining preset parameters; calculating actual parameters; comparing the actual parameter with a preset parameter, if the actual parameter is greater than or equal to the preset parameter, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection frequency requirement; when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan; and when the preset parameter is the preset accumulated operation time within the preset blade angle range, the actual parameter is the actual accumulated operation time within the preset blade angle range. The method can supplement grease to the grease-lacking part according to the preset grease injection requirement by combining the actual running conditions of the wind turbine generator such as the number of times of collecting the propeller or the running time of different propeller angles, so that the grease injection effect of the grease-lacking part can be ensured while the grease is saved, the service life of parts can be ensured, and the manual maintenance operation amount of the wind turbine generator is reduced.
Description
Technical Field
The invention relates to the technical field of wind turbine generator lubrication, in particular to an automatic lubrication method and a controller for a variable-pitch bearing of a wind turbine generator.
Background
At present, a variable-pitch lubricating device of a wind turbine generator system lubricates variable-pitch key parts during operation, so that the service life of the key parts is ensured, and the manual maintenance operation amount of the wind turbine generator system is reduced. The automatic lubrication system of the pitch bearing is generally controlled by adopting fixed running time and interval time. For the variable-pitch bearing lubricating system, the fixed time control strategy is simple and convenient to realize. However, the same amount of grease injected in a fixed time cannot be guaranteed due to the influence of the amount of grease in the oil tank and air. Meanwhile, the running time of the fan at different paddle angle positions is obviously different, and the wear of the big gear and the small gear at different positions is different, so that the grease lubrication requirement is different.
The automatic lubrication system of the pitch bearing which is widely used at present generally adopts fixed running time and interval time to automatically control. However, the running time of the fan at different paddle angle positions is obviously different, and the wear of the big gear and the small gear at different positions is different, so that the grease injection quantity requirements at different positions are different, the problem that grease injection is unreasonable in the prior art is caused, even the problem that grease is thrown and scattered to the hub is easily caused, and the normal work of the fan is seriously influenced.
Disclosure of Invention
The invention aims to provide an automatic lubrication method for a variable-pitch bearing of a wind turbine generator and an automatic lubrication controller for the variable-pitch bearing of the wind turbine generator, which can supplement grease for grease-lacking parts according to preset grease injection requirements by combining actual operation conditions of the wind turbine generator such as the number of times of blade collection or operation time of different blade angles, so that grease injection effects of grease-lacking positions can be ensured while grease is saved, the service lives of parts can be further ensured, and the manual maintenance operation amount of the wind turbine generator is reduced.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides an automatic lubrication method for a pitch bearing of a wind turbine generator, including:
determining preset parameters;
calculating actual parameters;
comparing the actual parameter with a preset parameter, if the actual parameter is greater than or equal to the preset parameter, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection frequency requirement;
when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan; and when the preset parameter is the preset accumulated operation time within the preset blade angle range, the actual parameter is the actual accumulated operation time within the preset blade angle range.
In an optional embodiment, when the preset parameter is the preset propeller retracting times of the fan and the actual parameter is the actual propeller retracting times of the fan, the method for automatically lubricating the variable-pitch bearing of the wind turbine generator specifically comprises the following steps:
determining the preset propeller retracting times of the fan;
calculating the actual propeller retracting times of the fan;
and when the actual propeller retracting times are larger than or equal to the preset propeller retracting times, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection times.
In an optional embodiment, when the actual number of times of oar collection is greater than or equal to the preset number of times of oar collection, the process of controlling the operation of the lubrication pump further includes:
starting the lubricating pump when stopping and collecting the propeller, controlling the propeller blades to collect the propeller according to a preset speed, stopping the lubricating pump after finishing collecting the propeller, and recording the grease injection times.
In an optional embodiment, when the preset parameter is a preset accumulated operation time within a preset blade angle range, and the actual parameter is an actual accumulated operation time within the preset blade angle range, the method for automatically lubricating the pitch bearing of the wind turbine generator specifically includes:
respectively determining preset accumulated operation time of a blade angle in a plurality of angle range sections near 0 degrees;
respectively calculating the actual accumulated running time of the blade angle in a plurality of angle range sections around 0 degrees;
and when the preset accumulated running time is greater than or equal to the actual accumulated running time in the corresponding angle range section, controlling the lubricating pump to run, and injecting grease according to the preset grease injection frequency requirement so as to lubricate the corresponding angle range section.
In an alternative embodiment, the plurality of angular range segments around 0 ° specifically includes blade angular range segments of 0-5 °, 5-10 °, and 10-20 °.
In an optional embodiment, the automatic lubrication method for the pitch bearing of the wind turbine further includes:
determining a preset total interval period of lubrication;
calculating the actual total interval period of lubrication and the number of times of grease injection in each period;
and comparing the actual total interval period of lubrication with the preset total interval period of lubrication, and controlling the lubricating pump to operate if the actual total interval period of lubrication is greater than or equal to the preset total interval period of lubrication and the total grease injection times of the lubricating pump in the actual total interval period of lubrication do not reach the preset grease injection times.
In an alternative embodiment, if the actual total interval period of lubrication is greater than or equal to the preset total interval period of lubrication, the process of controlling the operation of the lubrication pump further includes:
judging whether the actual wind speed is less than the starting wind speed of the wind turbine generator;
and if the actual wind speed is less than the starting wind speed of the motor set, controlling the blades of the wind turbine set to repeatedly change between the position with the blade angle of 0 degree and the stop position until the lubricating requirement is met.
In an optional embodiment, the controlling the operation of the lubrication pump and the grease injection according to the preset grease injection frequency requirement specifically comprises:
calculating preset grease injection times according to the total volume and/or total amount of the grease and the total grease injection time after the grease is completely injected;
and calculating the actual grease injection times, comparing the actual grease injection times with the preset grease injection times, and controlling the lubricating pump to inject grease according to the preset grease injection times if the actual grease injection times are smaller than the preset grease injection times.
In an optional embodiment, the automatic lubrication method for the pitch bearing of the wind turbine further includes:
collecting pulse signals when a lubricating pump runs, and collecting the total change times of the pulse signals when the grease is used up;
and calculating the grease injection amount corresponding to one time of change of the pulse signal of the lubricating pump.
In a second aspect, an embodiment of the present invention provides an automatic lubrication controller for a pitch bearing of a wind turbine, including:
the determining module is used for determining preset parameters;
the calculation module is used for calculating actual parameters;
the judging module is used for comparing the actual parameters with the preset parameters;
the execution module is used for controlling the lubricating pump to operate and injecting grease according to the requirement of the preset grease injection times if the actual parameter is greater than or equal to the preset parameter;
when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan; and when the preset parameter is the preset accumulated operation time within the preset blade angle range, the actual parameter is the actual accumulated operation time within the preset blade angle range.
The embodiment of the invention has at least the following advantages or beneficial effects:
the embodiment of the invention provides an automatic lubrication method and a controller for a variable-pitch bearing of a wind turbine generator, wherein the method comprises the following steps: determining preset parameters; calculating actual parameters; comparing the actual parameter with a preset parameter, if the actual parameter is greater than or equal to the preset parameter, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection frequency requirement; when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan; and when the preset parameter is the preset accumulated operation time within the preset blade angle range, the actual parameter is the actual accumulated operation time within the preset blade angle range. The method can supplement grease for the grease-lacking part according to the preset grease injection requirement by combining the actual operation conditions of the wind turbine generator such as the number of times of collecting the propeller or the operation time of different propeller angles, so that the grease injection effect of the grease-lacking part can be ensured while the grease is saved, the service life of parts can be further ensured, and the manual maintenance operation amount of the wind turbine generator is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a first schematic flow chart of an automatic lubrication method for a pitch bearing of a wind turbine generator according to an embodiment of the present invention;
fig. 2 is a schematic flow diagram of a second method for automatically lubricating a pitch bearing of a wind turbine generator according to an embodiment of the present invention;
fig. 3 is a schematic flow diagram three of an automatic lubrication method for a pitch bearing of a wind turbine generator according to an embodiment of the present invention;
fig. 4 is a fourth schematic flow chart of an automatic lubrication method for a pitch bearing of a wind turbine generator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an automatic lubrication controller for a pitch bearing of a wind turbine generator according to an embodiment of the present invention.
Description of reference numerals: 100-an automatic lubrication controller for a variable-pitch bearing of the wind turbine generator; 101-a calculation module; 103-a judgment module; 105-an execution module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Fig. 1 is a first schematic flow chart of an automatic lubrication method for a pitch bearing of a wind turbine generator according to an embodiment of the present invention. Referring to fig. 1, the embodiment provides an automatic lubrication method for a pitch bearing of a wind turbine generator, and the method is mainly used for automatically lubricating the pitch bearing of the wind turbine generator to ensure that the bearing can be effectively lubricated, so as to ensure the normal operation of the wind turbine generator.
In detail, referring to fig. 1 again, the method for automatically lubricating the pitch bearing of the wind turbine generator includes:
step S1: determining preset parameters;
in detail, the preset parameter may be selected as a preset number of times of blade retraction of the fan or a preset accumulated operating time within a preset blade angle range. The preset paddle-retracting times of the fan can be determined according to actual experience and detection results. For example, in the process of normally stopping and retracting the propeller, if the lubrication condition of the bearing is detected to obtain a detection result that grease needs to be supplemented when the propeller is normally retracted a times, the preset propeller retracting times are determined as a times. Certainly, the fan can be shut down due to failure, so that the lubrication condition of the bearing can be simulated during the failure shutdown and the normal shutdown, and a proper preset number of times of propeller retraction is selected, which is not described in detail in this embodiment. Similarly, the preset accumulated operating time within the preset blade angle range of the fan can also be determined based on experience and detection results. For example, when the accumulated operation time of the blade angle within the range of 0-5 °, 5-10 °, 10-20 ° or other ranges exceeds b hours, a detection result that grease needs to be supplemented is obtained by detecting the lubrication condition of the bearing, and then the preset accumulated operation time is determined as b hours.
Step S2: calculating actual parameters;
in detail, when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan, and the actual propeller retracting times of the fan can be detected according to a sensor or an additional detection mechanism. Similarly, when the preset parameter is a preset accumulated operation time within a preset blade angle range, the actual parameter is an actual accumulated operation time within the preset blade angle range, and the actual accumulated operation time can be determined by a sensor or a time detection mechanism provided in the bearing.
Step S3: and comparing the actual parameter with a preset parameter, if the actual parameter is greater than or equal to the preset parameter, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection frequency requirement. Otherwise, the method is not started, or is directly finished, or enters the next period.
In detail, the operation of the lubricating pump is controlled, and the grease injection according to the preset grease injection frequency requirement specifically comprises the following steps:
step S31: calculating preset grease injection times according to the total volume and/or total amount of the grease and the total grease injection time after the grease is completely injected;
in detail, when the preset grease injection times n are calculated according to the total volume of the grease, the loss of the volume of the grease during grease injection can be calculated, and then the total volume of the grease is divided by the loss of the volume of the single grease to obtain the preset grease injection times n. Of course, in order to further determine the accuracy of the preset grease injection times, the preset grease injection times n may also be calculated by using the total amount of the grease, for example, the volume and the weight of the single grease injection may be calculated, so as to obtain the accurate preset grease injection times n under the accounting of the total amount of the grease and the total weight, which is not described in detail in this embodiment.
Step S32: and calculating the actual grease injection times, comparing the actual grease injection times with the preset grease injection times, and controlling the lubricating pump to inject grease according to the preset grease injection times if the actual grease injection times are smaller than the preset grease injection times.
In detail, if the actual number of times of fat injection is found to be smaller than the preset number of times of fat injection n through comparison, which indicates that the number of times of fat injection is too small, fat injection may be performed in accordance with the preset number of times of fat injection. Of course, if the actual grease injection times are larger than the preset grease injection times n, the grease injection times can be reduced, so that the grease consumption is saved.
The method can supplement grease to the grease-lacking part according to the preset grease injection requirement by combining the actual operation conditions of the wind turbine generator such as the number of times of collecting the propeller or the operation time of different propeller angles, so that the grease injection effect of the grease-lacking part can be ensured while the grease is saved, the service life of parts can be ensured, and the manual maintenance operation amount of the wind turbine generator is reduced.
The specific flow of the above-described lubrication method is explained in detail below:
fig. 2 is a schematic flow diagram of a second method for automatically lubricating a pitch bearing of a wind turbine generator according to an embodiment of the present invention. Referring to fig. 2, in this embodiment, when the preset parameter is a preset number of times of pitch take-up of the wind turbine, and the actual parameter is an actual number of times of pitch take-up of the wind turbine, the method for automatically lubricating the pitch bearing of the wind turbine specifically includes:
step S1: determining the preset propeller retracting times of the fan;
in detail, the determination is made based on actual experience and detection results. For example, in the process of normally stopping and retracting the propeller, if the lubrication condition of the bearing is detected to obtain a detection result that grease needs to be supplemented when the propeller is normally retracted a times, the preset propeller retracting times are determined as a times.
Step S2: calculating the actual propeller retracting times of the fan;
in detail, the actual number of times of propeller retracting A of the fan can be obtained by detection of a sensor or detection of an additional detection mechanism.
Step S3: and when the actual propeller retracting times are larger than or equal to the preset propeller retracting times, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection times.
In detail, if A is larger than or equal to a, the lubricating pump is controlled to operate, and grease is injected according to the requirement of the preset grease injection times. Meanwhile, it needs to be noted that in the process, the lubricating pump is started when the propeller is stopped and retracted, the propeller is controlled to retract according to a preset speed, the lubricating pump is stopped after the propeller is retracted, and the grease injection times are recorded, so that the whole process is more accurate.
Fig. 3 is a third schematic flow chart of the automatic lubrication method for the pitch bearing of the wind turbine generator system provided in this embodiment. Referring to fig. 3, when the preset parameter is a preset accumulated operation time within a preset blade angle range, and the actual parameter is an actual accumulated operation time within the preset blade angle range, the method for automatically lubricating the pitch bearing of the wind turbine generator specifically includes:
step S1: respectively determining preset accumulated operation time of a blade angle in a plurality of angle range sections near 0 degrees;
in detail, the plurality of angular range sections around 0 ° specifically include blade angular range sections of 0 to 5 °, 5 to 10 °, and 10 to 20 °. Of course, in other embodiments, more angular range segments can be selected, and the embodiment is described in detail with the angular segment with the largest demand.
For example, when the preset accumulated operation time b1 of the blade angle in the angle range of 0-5 ° is determined, when the accumulated operation time of the blade angle in the range of 0-5 ° exceeds b1 hours, a detection result that grease needs to be supplemented is obtained by detecting the lubrication condition of the bearing, and then the preset accumulated operation time is determined as b1 hours.
Similarly, when the preset accumulated operation time b2 of the blade angle in the angle range of 5-10 degrees is determined, when the accumulated operation time of the blade angle in the range of 0-5 degrees exceeds b2 hours, a detection result that grease needs to be supplemented is obtained by detecting the lubrication condition of the bearing, and then the preset accumulated operation time is determined as b2 hours.
Similarly, when the preset accumulated operation time b3 of the blade angle in the angle range of 10-20 degrees is determined, when the accumulated operation time of the blade angle in the range of 0-5 degrees exceeds b3 hours, a detection result that grease needs to be supplemented is obtained by detecting the lubrication condition of the bearing, and then the preset accumulated operation time is determined as b3 hours.
Step S2: respectively calculating the actual accumulated running time of the blade angle in a plurality of angle range sections around 0 degrees;
in detail, when the actual accumulated operation time B1 of the blade angle in the angle range of 0 to 5 ° is determined, the determination may be made by a sensor or a time detection mechanism provided to the bearing.
Similarly, when the preset accumulated operation time B2 of the blade angle in the angle range of 5 to 10 ° and the preset accumulated operation time B3 of the blade angle in the angle range of 10 to 20 ° are determined, the determination may be performed by a sensor or a time detection mechanism provided in the bearing.
Step S3: and when the preset accumulated running time is greater than or equal to the actual accumulated running time in the corresponding angle range section, controlling the lubricating pump to run, and injecting grease according to the preset grease injection frequency requirement so as to lubricate the corresponding angle range section.
In detail, if B1 is more than or equal to B1, or B2 is more than or equal to B2, or B3 is more than or equal to B3, the lubricating pump can be controlled to lubricate the position in the angle range, the operating time of different paddle angles can be calculated through the arrangement, the lubricating pump is respectively started, and grease is injected according to the grease injection frequency requirement, so that the lubricating pump can inject more grease to the long-time meshing position, less grease is injected to the short-time meshing position, the abrasion is reduced, and grease is saved.
Further, fig. 4 is a fourth schematic flow chart of the automatic lubrication method for the pitch bearing of the wind turbine generator provided in this embodiment. Referring to fig. 4, in the embodiment, in order to further ensure the accuracy and precision of the grease injection operation and save grease, step S3 of the method for automatically lubricating the pitch bearing of the wind turbine generator specifically includes:
step S31: determining a preset total interval period of lubrication;
in detail, when the preset total interval period of lubrication is determined, the preset total interval period t of lubrication which completely meets the grease injection requirement can be obtained according to experience and detection data.
Step S32: calculating the actual total interval period of lubrication and the number of times of grease injection in each period;
in detail, the actual total interval period T of lubrication and the number of times of grease injection c in each period may be detected by the detection means.
Step S33: and comparing the actual total interval period of lubrication with the preset total interval period of lubrication, and controlling the lubricating pump to run if the actual total interval period of lubrication is greater than or equal to the preset total interval period of lubrication and the running pulse frequency of the lubricating pump does not reach the preset grease injection frequency.
In detail, if T ≧ T, the total actual number of times of grease injection in this period T may be detected, for example, if the actual number of times of grease injection in each period is c, the total actual number of times of grease injection in T periods is T ×, in order to check whether the number of times of grease injection meets the requirement, the total number of times of grease injection may be compared with a preset number of times of grease injection n, if T × c < n, it is determined that the number of times of grease injection is insufficient, and the lubrication pump is controlled to operate until the preset number of times of grease injection n is reached.
Specifically, when the preset parameter is the preset propeller retracting times of the fan, and the actual parameter is the actual propeller retracting times of the fan, the actual lubricating total interval period T1 and the grease injection times c1 in each period are used, and if T1 × c1 is less than n, the lubricating pump is controlled to operate until the preset grease injection times n are reached. Similarly, when the preset parameter is the preset accumulated operation time in the preset blade angle range, and the actual parameter is the actual accumulated operation time in the preset blade angle range (0-5 °, 5-10 ° and 10-20 °), the actual total lubrication interval periods are respectively T2, T3 and T4, the grease injection times in each period are respectively c2, c3 and c4, and if T2 c2 < n, or T3 c3 < n, or T4 c4 < n, the lubrication pump is controlled to operate until the preset grease injection times n are reached.
It should be noted that, if the actual total interval period of lubrication is greater than or equal to the preset total interval period of lubrication, the process of controlling the operation of the lubrication pump further includes:
judging whether the actual wind speed is less than the starting wind speed of the wind turbine generator; and if the actual wind speed is less than the starting wind speed of the motor set, controlling the blades of the wind turbine set to repeatedly change between the position with the blade angle of 0 degree and the stop position until the lubricating requirement is met. That is, after the total interval period of lubrication is set and the total interval period of lubrication is exceeded, if the number of running pulses of the lubrication pump does not reach the required times, the lubrication pump is automatically started when the wind speed is lower than the wind speed of the starting machine, meanwhile, the blade repeatedly changes at a certain speed between the blade retracting position and 0 degrees, and after the required times of lubrication are reached, the blade retracts, and the lubrication pump stops. By the arrangement, good lubrication can be provided for the variable-pitch bearing and the variable-pitch tooth surface, the lubrication requirement during the operation of the variable-pitch bearing is met, the lubrication operation of the variable-pitch key parts during the operation is realized, and the service life of the key parts is ensured; meanwhile, the phenomenon that the blades are not moved during lubricating grease injection, grease injection is concentrated at certain positions, and grease is lacked at other positions can be avoided, so that the manual maintenance operation amount of the wind turbine generator is reduced.
It should be further noted that, in this embodiment, the method for automatically lubricating the pitch bearing of the wind turbine generator further includes: collecting pulse signals when a lubricating pump runs, and collecting the total change times of the pulse signals when the grease is used up; and calculating the grease injection amount corresponding to one time of change of the pulse signal of the lubricating pump.
In detail, in order to ensure the accuracy of the grease injection operation and the lubrication performance, the pulse signal can be detected by a sensor of the lubricating pump, the change of the pulse signal every time is recorded, if the change is once, the grease injection is successful once, therefore, the accurate grease injection amount can be accurately obtained by indicating the grease injection frequency according to the frequency of the change of the pulse signal, and the accuracy of the grease injection can be ensured during the grease injection.
Specifically, in the calculation process, the sensor can be used for sensing the grease injection amount or the grease injection volume when the lubricating pump rotates for one time by one circle of pulse signal change, then the total grease amount or the total grease injection volume is divided by the single using amount to obtain the accurate grease injection times, and simultaneously the grease injection amount at each time can be obtained in a simulated mode, so that the accuracy of the grease injection amount can be ensured, and the situation that the grease injection amount cannot be reached due to air, liquid level and the like when the grease injection time is controlled can be avoided.
Fig. 5 is a schematic diagram of a structure of the automatic lubrication controller 100 for a pitch bearing of a wind turbine generator according to the embodiment. Referring to fig. 5, the present embodiment further provides an automatic lubrication controller 100 for a pitch bearing of a wind turbine generator, including: a determination module, a calculation module 101, a judgment module 103 and an execution module 105.
In detail, in this embodiment, the determining module is configured to determine a preset parameter; the calculation module 101 is used for calculating actual parameters; the judging module 103 is used for comparing the actual parameter with the preset parameter; if the actual parameter is greater than or equal to the preset parameter, the execution module 105 is used for controlling the lubricating pump to operate, and injecting grease according to the preset grease injection frequency requirement; when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan; and when the preset parameter is the preset accumulated operation time within the preset blade angle range, the actual parameter is the actual accumulated operation time within the preset blade angle range. The above method for calculating the steps has already been described in detail, and this embodiment is not described again.
According to the automatic lubrication method and the controller for the variable-pitch bearing of the wind turbine generator, which are provided by the embodiment of the invention, grease can be supplemented to the grease-deficient part according to the preset grease injection requirement by combining the actual operation conditions of the wind turbine generator such as the number of times of collecting the propeller or the operation time of different propeller angles, so that the grease injection effect of the grease-deficient position can be ensured while the grease is saved, the service life of parts can be further ensured, and the manual maintenance operation amount of the wind turbine generator can be reduced. The controller can coordinate the matching relation between the lubricating pump and other structures of the wind turbine generator, and effectively inform the lubricating pump to perform lubricating operation, so that the operating efficiency and the operating quality can be effectively ensured.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A wind turbine generator system variable pitch bearing automatic lubrication method is characterized by comprising the following steps:
determining preset parameters;
calculating actual parameters;
comparing the actual parameter with the preset parameter, if the actual parameter is greater than or equal to the preset parameter, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection frequency requirement;
when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan; and when the preset parameter is preset accumulated running time within a preset blade angle range, the actual parameter is actual accumulated running time within the preset blade angle range.
2. The method according to claim 1, wherein when the preset parameter is a preset pitch taking number of the fan and the actual parameter is an actual pitch taking number of the fan, the method specifically comprises:
determining the preset paddle retracting times of the fan;
calculating the actual propeller retracting times of the fan;
and when the actual propeller retracting times are larger than or equal to the preset propeller retracting times, controlling the lubricating pump to operate, and injecting grease according to the preset grease injection times.
3. The automatic lubrication method for the pitch bearing of the wind turbine generator according to claim 2, wherein when the actual number of times of pitch take-up is greater than or equal to the preset number of times of pitch take-up, the process of controlling the operation of the lubrication pump further comprises:
starting the lubricating pump when the engine is stopped and collecting the propeller, simultaneously controlling the propeller blades to collect the propeller according to a preset speed, stopping the lubricating pump after the propeller is collected, and recording the grease injection times.
4. The method according to claim 1, wherein when the preset parameter is a preset accumulated operation time within a preset blade angle range and the actual parameter is an actual accumulated operation time within the preset blade angle range, the method specifically comprises:
respectively determining preset accumulated operation time of a blade angle in a plurality of angle range sections near 0 degrees;
respectively calculating the actual accumulated running time of the blade angle in a plurality of angle range sections around 0 degrees;
and when the preset accumulated running time is greater than or equal to the actual accumulated running time in the corresponding angle range section, controlling the lubricating pump to run, and performing grease injection according to the preset grease injection frequency requirement so as to lubricate the corresponding angle range section.
5. The automatic lubrication method for the pitch bearing of the wind turbine generator according to claim 4, characterized in that:
the plurality of angular range segments around 0 ° specifically include blade angular range segments of 0-5 °, 5-10 °, and 10-20 °.
6. The method for automatically lubricating a wind turbine generator pitch bearing according to any one of claims 1 to 5, further comprising:
determining a preset total interval period of lubrication;
calculating the actual lubricating total interval period and the grease injection times in a single period;
and comparing the actual total interval period of lubrication with the preset total interval period of lubrication, and if the actual total interval period of lubrication is greater than or equal to the preset total interval period of lubrication, controlling the operation of the lubrication pump if the total grease injection times of the lubrication pump in the actual total interval period of lubrication do not reach the preset grease injection times.
7. The method for automatically lubricating a pitch bearing of a wind turbine generator according to claim 6, wherein if the actual total interval period of lubrication is greater than or equal to the preset total interval period of lubrication, the process of controlling the operation of the lubrication pump further comprises:
judging whether the actual wind speed is less than the starting wind speed of the wind turbine generator;
and if the actual wind speed is less than the starting wind speed of the motor set, controlling the blades of the wind turbine set to repeatedly change between a position with a blade angle of 0 degree and a stop position until the lubricating requirement is met.
8. The automatic lubrication method for the pitch bearing of the wind turbine generator according to any one of claims 1 to 5, wherein the step of controlling the operation of the lubrication pump and the step of grease injection according to the preset grease injection frequency requirement specifically comprises the steps of:
calculating the preset grease injection times according to the total volume and/or total amount of the grease and the total grease injection time after the grease is completely injected;
and calculating the actual grease injection times, comparing the actual grease injection times with the preset grease injection times, and controlling the lubricating pump to inject grease according to the preset grease injection times if the actual grease injection times are smaller than the preset grease injection times.
9. The method for automatically lubricating a wind turbine generator pitch bearing according to any one of claims 1 to 5, further comprising:
collecting pulse signals when the lubricating pump runs, and collecting the total change times of the pulse signals when the grease is used up;
and calculating the grease injection amount corresponding to one-time change of the pulse signal of the lubricating pump.
10. The utility model provides a wind turbine generator system becomes oar bearing self-lubricate controller which characterized in that includes:
the determining module is used for determining preset parameters;
the calculation module is used for calculating actual parameters;
the judging module is used for comparing the actual parameters with the preset parameters;
the execution module is used for controlling the lubricating pump to operate and injecting grease according to the requirement of preset grease injection times if the actual parameter is greater than or equal to the preset parameter;
when the preset parameter is the preset propeller retracting times of the fan, the actual parameter is the actual propeller retracting times of the fan; and when the preset parameter is preset accumulated running time within a preset blade angle range, the actual parameter is actual accumulated running time within the preset blade angle range.
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| CN114658617A (en) * | 2022-04-28 | 2022-06-24 | 中国华能集团清洁能源技术研究院有限公司 | Automatic yaw lubrication control early warning system of wind driven generator and working method of automatic yaw lubrication control early warning system |
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Address after: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Applicant after: Sany Heavy Energy Co.,Ltd. Address before: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Applicant before: SANY HEAVY ENERGY Co.,Ltd. |
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Application publication date: 20201013 |