CN110082100B - Uniform load test verification method for wind turbine yaw driving system - Google Patents
Uniform load test verification method for wind turbine yaw driving system Download PDFInfo
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- CN110082100B CN110082100B CN201910230172.0A CN201910230172A CN110082100B CN 110082100 B CN110082100 B CN 110082100B CN 201910230172 A CN201910230172 A CN 201910230172A CN 110082100 B CN110082100 B CN 110082100B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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Abstract
The invention discloses a wind turbine generator yaw driving system load balancing test verification method, which fully considers the structural characteristics of a yaw driving system, and extrapolates yaw driving torque by mounting a torque test sensor on a structure in front of a final-stage inner gear ring and a support chassis of a yaw reduction box planetary system and measuring the calibration relation between the torsional deformation and the strain deformation of the outer wall of the structure and the torque.
Description
Technical Field
The invention relates to the technical field of wind turbine generator yaw driving, in particular to a wind turbine generator yaw driving system load balancing test verification method.
Background
In the prior art, as wind generating sets are developed in large scale, yaw driving systems belong to slow and heavy-load systems, and a plurality of yaw driving systems are generally designed around a yaw gear ring, and the number of the yaw driving systems is different. The yaw driving system mainly comprises a yaw driving motor, a yaw reduction box, a driving gear and the like, wherein the yaw motor drives the high-speed end of the yaw reduction box, the low-speed end of the yaw reduction box is connected with the driving gear and meshed with the yaw inner gear ring to drive the whole wind turbine cabin to rotate and yaw relative to the tower barrel. The yaw driving system is composed of a plurality of yaw drivers, each yaw driver adopts a mode of multi-stage planetary gear transmission series connection, an inner gear ring is fixed, a planetary gear and a planetary carrier are relatively fixed, the planetary gear and the planetary carrier float, and a four-stage planetary carrier is connected with an output shaft to serve as an output part.
However, in the industry, faults such as yaw drive damage and the like occur in the unit which runs in batches, wherein the faults include tripping of a protection switch, burning of a drive motor, tooth breakage of a reduction gearbox, shearing of a bolt of the reduction gearbox, fatigue fracture of a drive shaft and the like, and great economic loss is brought. In order to clearly study the cause of damage to the yaw drive system, the drive torque of each drive system needs to be known clearly, the drive load distribution characteristics are analyzed, the loading conditions of the drive systems under various operating conditions are further studied, and the root cause of the reduction of the service life of the systems is analyzed. The conventional method for measuring the shaft torque is characterized in that a commercial torque sensor is additionally arranged between a driving gear and a reduction gearbox, or a torque sensor is additionally arranged at a high-speed end to monitor the high-speed shaft torque and then is extrapolated to a low-speed shaft torque, the two methods have defects, the first method can seriously change a field tool, is complex to operate and high in cost, and basically cannot be implemented on the field; the second type also requires a tool to be installed at each stage, and the measurement accuracy is affected due to the unknown transfer efficiency and the influence of the transfer dead zone.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, provides a brand-new wind turbine generator yaw driving system load balancing test verification method, fully considers the structural characteristics of a yaw driving system, extrapolates yaw driving torque by mounting a torque test sensor on a structure in front of a final-stage ring gear of a planetary system of a yaw reduction box and a support chassis and measuring the calibration relation between the torsional deformation quantity and the strain variable of the outer wall of the structure and the torque, is different from the traditional method for testing and mounting the torque sensor, directly converts the yaw driving system into the sensor, does not need to change the original system structure in the overall test method, and solves the defects that the conventional detection method has larger change on the driving system, heavy workload, unknown gear train efficiency, and the like.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a wind turbine generator yaw driving system uniform load test verification method comprises the following steps:
1) mounting a torque test sensor on the outer wall of a support shell connected with a reduction gearbox and a fan chassis of the yaw driving system, then adopting any one of a strain signal measurement mode of 1/4 bridge, half bridge and full bridge to connect a strain signal into a multichannel strain acquisition instrument, and in order to measure the load-sharing characteristic of all yaw drives simultaneously, mounting the torque test sensor on the outer wall of the support shell connected with the reduction gearbox and the fan chassis of all yaw driving systems according to the same method;
2) because the measuring shell is a casting, the thickness of each shell is inconsistent, and a strain signal needs to be calibrated; during calibration, a high-speed shaft driving motor of the yaw driving system needs to be temporarily taken down, a calibrated torque sensor is installed on the high-speed shaft of the yaw driving system, one end of the torque sensor is connected with the high-speed shaft, and the other end of the torque sensor is connected with a lever;
3) after calibration and installation are finished, a testing system is electrified for measurement, strain signals of a torque testing sensor corresponding to a yaw driving system and torque sensor signals on a high-speed shaft are recorded, meanwhile, a yaw braking system of the yaw driving system is required to be in a holding state, then, a lever is manually loaded, the loading mode is gradual stress application, then gradual force reduction is carried out, and the load is circularly loaded and released for 2-3 times;
4) calculating the low-speed shaft torque of the yaw driving system according to the transmission ratio of the reduction gearbox by using the obtained torque sensor signal, then establishing a linear fitting relation between the strain signal of the torque test sensor and the calculated low-speed shaft torque, and converting the strain signal time sequence data of the torque test sensor into the low-speed shaft torque by using the calibration relation;
5) after calibrating one yaw driving system, removing the torque sensor, resetting the high-speed shaft driving motor, namely installing the high-speed shaft driving motor back to the original position, and calibrating the torque testing sensors of all yaw driving systems to be measured according to the signal calibration process;
6) after calibration is completed, after the calibration relations of all torque test sensors are established, assembly of a yaw driving system is recovered, the calibration relations are input into a multi-channel strain acquisition instrument, signals are subjected to zero returning balance, and real-time measurement is started after configuration is completed;
7) and (4) performing a test according to working conditions required by the test, measuring the low-speed shaft torques of all yaw driving systems in real time, and storing data for uniform load characteristic analysis.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the method has the advantages of convenient test, short implementation period, simple test system and low requirement on the operation process.
2. The original mechanical structure is not changed, and the system characteristics are not changed.
3. The load transmission path is short, the test result is accurate and reliable, and the real-time characteristic of the torque of the driving gear can be accurately evaluated.
4. And a plurality of expensive torque sensors are not required to be added, so that the cost is low.
Drawings
FIG. 1 is a schematic view of yaw drive measurement.
FIG. 2 is a schematic diagram of yaw drive measurement signal calibration.
Detailed Description
The present invention will be further described with reference to the following specific examples.
A single yaw driving system and a single yaw driving test can be simplified as shown in fig. 1, under a normal working condition environment, a high-speed shaft driving motor 1 drives a multistage planetary reduction gearbox 2 to transmit torque to a low-speed shaft driving gear 4, so that a whole fan head is driven to yaw relative to an inner gear ring 3 of a tower barrel, and 8 in the drawing is high-speed shaft driving torque.
As shown in fig. 2, the method for testing and verifying uniform load of the yaw driving system of the wind turbine generator provided by the embodiment includes the following steps:
1) a torque test sensor 6 is arranged on the outer wall of a supporting shell body of a yaw driving system, wherein the supporting shell body is connected with a wind turbine chassis through a reduction gearbox 2, then any strain signal measurement mode of 1/4 bridges, half bridges and full bridges is adopted to connect strain signals into a multichannel strain acquisition instrument 9, and in order to measure the load-sharing characteristic of all yaw driving systems at the same time, the torque test sensor 6 is arranged on the outer wall of the supporting shell body of the yaw driving system, wherein the reduction gearbox 2 is connected with the wind turbine chassis.
2) Because the measuring shell is a casting, the thickness of each shell is inconsistent, and a strain signal needs to be calibrated; during calibration, the high-speed shaft driving motor 1 of the yaw driving system needs to be temporarily taken down, a calibrated torque sensor 10 is installed on the high-speed shaft of the yaw driving system, one end of the torque sensor 10 is connected with the high-speed shaft, and the other end of the torque sensor is connected with a lever 11.
3) After the calibration and installation are finished, the testing system is electrified for measurement, strain signals of a torque testing sensor 6 under a corresponding yaw driving system and signals of a torque sensor 10 on a high-speed shaft are recorded, meanwhile, a yaw braking system 5 of the yaw driving system is required to be in a holding state, then, a lever 11 is manually loaded, the loading mode is gradual stress application, then, gradual force reduction is carried out, and the load is circularly loaded and released for 2-3 times.
4) And calculating the low-speed shaft torque 7 of the yaw driving system according to the transmission ratio of the reduction gearbox 2 through the obtained signal of the torque sensor 10, establishing a linear fitting relation between the strain signal of the torque test sensor 6 and the calculated low-speed shaft torque 7, and converting the strain signal time sequence data of the torque test sensor 6 into the low-speed shaft torque by using the calibration relation.
5) After calibrating one yaw driving system, the torque sensor 10 is removed, the high-speed shaft driving motor 1 is reset, namely, the high-speed shaft driving motor is installed back to the original position, and then the torque testing sensors 6 of all yaw driving systems needing to be measured are calibrated according to the signal calibration process.
6) And after calibration is completed, after the calibration relations of all the torque test sensors 6 are established, the assembly of the yaw driving system is recovered, the calibration relations are input into the multi-channel strain acquisition instrument 9, signals are subjected to zero returning balance, and after configuration is completed, real-time measurement is started.
7) And (4) performing a test according to working conditions required by the test, measuring the low-speed shaft torques 7 of all yaw driving systems in real time, and storing data for uniform load characteristic analysis.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the changes in the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (1)
1. A wind turbine generator yaw driving system uniform load test verification method is characterized by comprising the following steps:
1) mounting a torque test sensor (6) on the outer wall of a supporting shell of a yaw driving system, wherein the supporting shell is connected with a wind turbine chassis through a reduction gearbox, and then connecting a strain signal into a multichannel strain acquisition instrument by adopting any one of the strain signal measurement modes of 1/4 bridge, half bridge and full bridge, and mounting the torque test sensor (6) on the outer wall of the supporting shell of the yaw driving system, wherein the reduction gearbox is connected with the wind turbine chassis, and the torque test sensor is mounted on the outer wall of the supporting shell of the yaw driving system;
2) calibrating the strain signal; during calibration, a high-speed shaft driving motor of a yaw driving system needs to be temporarily taken down, a calibrated torque sensor (10) is installed on the high-speed shaft of the yaw driving system, one end of the torque sensor (10) is connected with the high-speed shaft, and the other end of the torque sensor is connected with a lever;
3) after the calibrated torque sensor (10) is installed, a test system is electrified for measurement, a strain signal of the torque test sensor (6) under the corresponding yaw driving system and a signal of the torque sensor (10) on the high-speed shaft are recorded, meanwhile, a yaw braking system of the yaw driving system is required to be in a holding state, then, the lever is manually loaded, the loading mode is gradual stress application, then, the force is gradually reduced, and the load is circularly loaded and released for 2-3 times;
4) calculating the low-speed shaft torque of a yaw driving system according to the transmission ratio of the reduction gearbox by using the obtained signal of the torque sensor (10), then establishing a linear fitting relation between the strain signal of the torque test sensor (6) and the calculated low-speed shaft torque, and converting the strain signal time sequence data of the torque test sensor (6) into the low-speed shaft torque by using the calibration relation;
5) after calibrating one yaw driving system, removing the torque sensor (10), resetting the high-speed shaft driving motor, namely installing the high-speed shaft driving motor back to the original position, and calibrating the torque test sensors (6) of all yaw driving systems to be measured according to the signal calibration process;
6) after calibration is completed, after the calibration relations of all torque test sensors (6) are established, assembly of a yaw driving system is recovered, the calibration relations are input into a multi-channel strain acquisition instrument, signals are subjected to zero resetting balance, and real-time measurement is started after configuration is completed;
7) and (4) performing a test according to working conditions required by the test, measuring the low-speed shaft torques of all yaw driving systems in real time, and storing data for uniform load characteristic analysis.
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| GB2479415A (en) * | 2010-04-09 | 2011-10-12 | Vestas Wind Sys As | Wind Turbine Independent Blade Control Outside The Rated Output |
| EP2715123B1 (en) * | 2011-05-27 | 2019-01-09 | Seawind Ocean Technology Holding BV | Wind turbine control system having a thrust sensor |
| CN103452756A (en) * | 2013-09-12 | 2013-12-18 | 太原重工股份有限公司 | Yaw system of wind generating set and wind generating set comprising system |
| CN106124196B (en) * | 2016-06-14 | 2018-08-28 | 明阳智慧能源集团股份公司 | A kind of gear case of blower transmission chain efficiency experimental test procedures |
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