CN113530766B - Blade mass unbalance identification method and device and wind turbine generator - Google Patents

Blade mass unbalance identification method and device and wind turbine generator Download PDF

Info

Publication number
CN113530766B
CN113530766B CN202111006170.7A CN202111006170A CN113530766B CN 113530766 B CN113530766 B CN 113530766B CN 202111006170 A CN202111006170 A CN 202111006170A CN 113530766 B CN113530766 B CN 113530766B
Authority
CN
China
Prior art keywords
blade
rotating speed
target
main shaft
mass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111006170.7A
Other languages
Chinese (zh)
Other versions
CN113530766A (en
Inventor
闫东波
黄柏权
周鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sany Renewable Energy Co Ltd
Original Assignee
Sany Renewable Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sany Renewable Energy Co Ltd filed Critical Sany Renewable Energy Co Ltd
Priority to CN202111006170.7A priority Critical patent/CN113530766B/en
Publication of CN113530766A publication Critical patent/CN113530766A/en
Application granted granted Critical
Publication of CN113530766B publication Critical patent/CN113530766B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • 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 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0296—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
    • 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
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F05B2260/966—Preventing, counteracting or reducing vibration or noise by correcting static or dynamic imbalance
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a blade mass unbalance identification method, a blade mass unbalance identification device and a wind turbine generator, wherein the blade mass unbalance identification method comprises the following steps: a target code disc hole is designated on the speed measuring code disc, the size of the target code disc hole is adjusted, any blade of the wind turbine generator is designated as a target blade, and an included angle between the target blade and the radial direction of the target code disc hole when the target blade rotates to a vertical downward position and the vertical surface vertical to the main shaft is a calibration angle; acquiring the rotating speed of a main shaft; and judging whether the mass of the target blade is heavier or lighter according to the acquired rotating speed of the main shaft. The method for identifying the mass unbalance of the blade is simple to operate, can judge and identify whether the mass of the blade is balanced after the blade is hoisted, and effectively reduces the production cost and the maintenance cost of the wind turbine generator.

Description

Blade mass unbalance identification method and device and wind turbine generator
Technical Field
The invention relates to the technical field of wind power generation, in particular to a method and a device for identifying mass unbalance of a blade and a wind turbine generator.
Background
If the factory counter weight of the blade is wrong, the mass of the three blades is unbalanced, and then the wind turbine is easy to vibrate during operation. Moreover, after the wind turbine generator is hoisted and starts to operate, it is difficult to find out which blade is heavier or lighter, and the blade can be detached and replaced again only by using a crane or detached and returned to a factory for counterweight again, so that the resource consumption is large, and the time for delaying the construction period is long.
Disclosure of Invention
The invention solves the problems that: how to identify which blade is heavier or lighter under the condition that the wind turbine generator is hoisted.
In order to solve the above problems, the present invention provides a method for identifying blade mass imbalance, wherein a speed measuring code disc is arranged on a main shaft of a wind wheel, a speed measuring sensor corresponding to the speed measuring code disc is arranged on the wind wheel, the speed measuring sensor is horizontally arranged, and the method for identifying blade mass imbalance comprises the following steps:
designating a target code disc hole on the speed measuring code disc, adjusting the size of the target code disc hole, designating any blade of the wind turbine generator as a target blade, and enabling an included angle between the target blade and the radial direction where the target code disc hole is located and a vertical plane perpendicular to the main shaft to be a calibration angle when the target blade rotates to a vertical downward position;
acquiring the rotating speed of the main shaft;
and judging whether the mass of the target blade is heavier or lighter according to the acquired rotating speed of the main shaft.
Optionally, before an included angle between the target blade and a radial direction where the target code disc hole is located when the target blade rotates to a vertical downward position and a vertical plane perpendicular to the main shaft is a calibration angle, the method further includes:
and judging whether the blade mass of the wind turbine generator is unbalanced or not according to the rotating speed of the main shaft.
Optionally, the determining whether the blade mass of the wind turbine generator is unbalanced according to the rotation speed of the main shaft includes:
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time according to the rotating speed of the main shaft;
judging whether the rotating speed variation trend curve is changed in a sine wave manner or a horizontal line manner;
if the rotating speed variation trend curve is changed in a sine wave manner, judging that the blade mass of the wind turbine generator is unbalanced; and if the rotating speed variation trend curve is changed in a horizontal line, judging the mass balance of the blades of the wind turbine generator.
Optionally, the calibration angle is 90 °, or, in the adjusting the size of the target code wheel hole, the size of the target code wheel hole is adjusted by arranging a metal sheet at the target code wheel hole.
Optionally, the nominal angle is 90 °;
the judging whether the mass of the target blade is heavier or lighter according to the obtained rotating speed of the main shaft comprises the following steps:
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time according to the obtained rotating speed of the main shaft;
judging whether the maximum jump variable of the rotating speed is positioned at the wave crest, the wave trough or other positions of the drawn rotating speed variation trend curve;
if the maximum jumping amount of the rotating speed is located at other positions of the drawn rotating speed change trend curve, appointing the target code disc hole on the speed measuring code disc again, adjusting the size of the target code disc hole, appointing the next blade of the wind turbine generator as the target blade, and jumping to the step of acquiring the rotating speed of the main shaft;
if the maximum jump amount of the rotating speed is located at the peak of the drawn rotating speed variation trend curve, judging the mass of the target blade to be heavier;
and if the maximum jump amount of the rotating speed is positioned at the trough of the drawn rotating speed variation trend curve, judging that the target blade is lighter in weight.
Optionally, after determining that the target blade is heavier in mass if the maximum jump amount of the rotation speed is located at a peak of the plotted rotation speed variation trend curve and determining that the target blade is lighter in mass if the maximum jump amount of the rotation speed is located at a trough of the plotted rotation speed variation trend curve, the method further includes:
and restoring the size of the target code disc hole to the size before adjustment, adjusting the size of the code disc hole on the speed measuring code disc, which is positioned on the same radial direction as the target code disc hole, and simultaneously jumping to the step of acquiring the rotating speed of the main shaft.
Optionally, after determining whether the mass of the target blade is heavier or lighter according to the obtained rotation speed of the main shaft, the method further includes:
and when the mass of the target blade is heavier or lighter, adjusting the balance weight of the target blade or other blades until the mass of the blades of the wind turbine generator reaches balance.
Optionally, the adjusting the balance weight of the target blade or other blades until the blade mass of the wind turbine reaches balance includes:
when the mass of the target blade is heavier, reducing the counterweight of the target blade or increasing the counterweight of other blades, and when the mass of the target blade is lighter, increasing the counterweight of the target blade or reducing the counterweight of other blades;
obtaining the rotating speed of the main shaft again;
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time again according to the rotating speed of the main shaft obtained again;
judging whether the re-drawn curve of the change trend of the rotating speed is changed in a horizontal straight line or not;
and if the re-drawn curve of the variation trend of the rotating speed is changed in a horizontal straight line, judging that the quality of the blades of the wind turbine generator is balanced.
The invention also provides a blade mass unbalance recognition device, which comprises:
the adjusting module is used for appointing a target code disc hole on the speed measuring code disc, adjusting the size of the target code disc hole, appointing any blade of the wind turbine generator as a target blade, and enabling an included angle between the target blade and the radial direction where the target code disc hole is located and a vertical plane perpendicular to the main shaft to be a calibration angle when the target blade rotates to a vertical downward position;
the acquisition module is used for acquiring the rotating speed of the main shaft;
and the judging module is used for judging whether the mass of the target blade is heavier or lighter according to the acquired rotating speed of the main shaft.
The invention also provides a wind turbine generator, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the blade mass unbalance identification method.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the target code disc hole is designated on the speed measuring code disc, the size of the target code disc hole is adjusted, any blade of the wind turbine generator is designated as the target blade, an included angle between the target blade and the radial direction of the target code disc hole when the target blade rotates to the vertical downward position is a calibration angle on a vertical plane perpendicular to the main shaft, then the rotating speed of the main shaft is obtained, and finally whether the mass of the target blade is heavier or lighter is judged according to the obtained rotating speed of the main shaft, so that which blade is heavier or lighter is identified when the mass of the blade of the wind turbine generator is unbalanced. The method has the advantages that the operation is simple, the measuring device of the wind turbine generator is directly utilized, the sensor or other detection equipment does not need to be arranged again, the blade does not need to be disassembled again for factory returning weighing and counterweight, whether the blade is balanced or not can be judged and identified after the blade is hoisted, the production cost and the maintenance cost of the wind turbine generator are effectively reduced, and the construction period of the wind turbine generator is shortened; meanwhile, after identifying which blade is heavier or lighter, the blade or the balance weights of other blades can be conveniently adjusted by workers, so that measures can be taken in targeted adjustment, and the efficiency is higher.
Drawings
FIG. 1 is a flow chart of a blade mass imbalance identification method in an embodiment of the present invention;
FIG. 2 is a flow chart of another aspect of a blade mass imbalance identification method in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a wind turbine generator according to an embodiment of the present invention, in which an included angle of 90 degrees is formed between a vertical blade and a metal sheet;
FIG. 4 is a schematic view of a curve of a variation trend of the rotation speed of the main shaft when the mass of the blades of the wind turbine generator is balanced and the size of the code disc hole of the speed measuring code disc of the main shaft is not changed in the embodiment of the present invention;
FIG. 5 is a schematic diagram of a trend curve of the rotating speed of the main shaft when the blade mass of the wind turbine generator is unbalanced and the size of a code disc hole of a speed measuring code disc of the main shaft is not changed in the embodiment of the invention;
FIG. 6 is a schematic diagram of a trend curve of the rotating speed of the main shaft after the mass of blades of the wind turbine generator is balanced and the size of a code disc hole of a speed measuring code disc of the main shaft is changed in the embodiment of the invention;
FIG. 7 is a schematic diagram of a trend curve of the rotating speed of the main shaft after the mass of blades of the wind turbine generator is unbalanced and the size of a code disc hole of a speed measuring code disc of the main shaft is changed in the embodiment of the invention;
FIG. 8 is a block diagram of a blade mass imbalance identification apparatus in an embodiment of the present invention.
Description of reference numerals:
1. a speed measuring code disc; 2. a speed measuring sensor; 3. a metal sheet; 4. a blade; 10. an adjustment module; 20. an acquisition module; 30. and a judging module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein.
Referring to fig. 1 and 3, an embodiment of the present invention provides a blade mass imbalance identification method, where a speed measurement code disc 1 is disposed on a main shaft of a wind wheel, a speed measurement sensor 2 corresponding to the speed measurement code disc 1 is disposed on the wind wheel, and the speed measurement sensor 2 is disposed horizontally, including the following steps:
step S200, a target code disc hole is designated on the speed measuring code disc 1, the size of the target code disc hole is adjusted, any blade 4 of the wind turbine generator is designated as a target blade, and an included angle between the target blade and the radial direction of the target code disc hole when the target blade rotates to a vertical downward position is a calibration angle on a vertical plane perpendicular to a main shaft;
step S300, obtaining the rotating speed of the main shaft;
and S400, judging whether the mass of the target blade is heavier or lighter according to the acquired rotating speed of the main shaft.
The wind wheel of the wind turbine mainly comprises a main shaft and blades 4. When the mass of the blades of the wind turbine generator is balanced, in the process that the wind wheel rotates at a constant speed, the blades 4 rotate from the vertically downward position to the vertically upward position, and rotate from the vertically upward position to the vertically downward position, the rotating speeds of the main shaft are almost the same, and even if the rotating speeds fluctuate, the fluctuation is small, so that the rotating speed of the main shaft is basically stabilized near a certain fixed value; when the mass of the blades of the wind turbine generator is unbalanced, in the process of uniform rotation of the wind wheel, due to the eccentric action, the rotating speed of the main shaft is influenced by the gravity of the blades 4, so that when the blades 4 with heavy mass (namely target blades) rotate to the vertical downward position, the rotating speed of the main shaft is the maximum, and when the blades 4 with heavy mass rotate to the vertical upward position, the rotating speed of the main shaft is the minimum, so that the rotating speed fluctuation of the main shaft is large. Based on this, when measuring the rotation speed of the spindle, the present embodiment is generally implemented by using the speed measurement sensor 2 and the speed measurement code disc 1, where the speed measurement sensor 2 is generally a proximity switch. Specifically, as shown in fig. 3, the speed measuring code wheel 1 is sleeved on the main shaft, and the speed measuring sensor 2 is located near the speed measuring code wheel 1 and horizontally arranged, that is, when one blade 4 rotates to a vertical position, a connecting line between the speed measuring sensor 2 and a blade root of the blade 4 is perpendicular to the blade 4 on a vertical plane perpendicular to the main shaft. Thus, when the target code disc hole passes through the speed measurement sensor 2, a calibration angle is formed between the radial direction of the target code disc hole and the target blade on the vertical plane perpendicular to the main shaft, wherein the radial direction of the target code disc hole refers to the direction of the diameter of the target code disc hole on the circular speed measurement code disc and is also the direction of the connecting line between the target code disc hole and the blade root of the target blade, so that the connecting line between the radial direction of the target code disc hole and the blade root of the target blade and the vertical plane perpendicular to the main shaft form a calibration included angle. Because the size of target code disc hole is different from the size of other code disc holes to when making target code disc hole pass through tacho sensor 2, tacho sensor 2 detects different decay signals, and then makes the main shaft rotational speed that detects appear the maximum jump variable at this moment, thereby realizes judging whether target blade is overweight or light according to the rotational speed of main shaft, and then reaches the purpose of discerning which blade 4 of air-out motor group is overweight or light.
In the embodiment, firstly, a target code disc hole is designated on the speed measuring code disc 1, the size of the target code disc hole is adjusted, meanwhile, any blade 4 of the wind turbine generator is designated as a target blade, an included angle between the target blade and the radial direction of the target code disc hole when the target blade rotates to the vertical downward position is a calibration angle, the included angle is perpendicular to the vertical plane of the main shaft, then the rotating speed of the main shaft is obtained again, and finally whether the quality of the target blade is heavier or lighter is judged according to the rotating speed of the main shaft obtained again, so that when the quality of the blades of the wind turbine generator is unbalanced, which blade 4 is heavier or lighter is identified. The operation is simple, the measuring device of the wind turbine generator is directly utilized, a sensor or other detection equipment does not need to be arranged again, and the blade 4 does not need to be disassembled again for factory returning weighing and counterweight, so that whether the blade quality is balanced or not can be judged and identified after the blade 4 is hoisted, the production cost and the maintenance cost of the wind turbine generator are effectively reduced, and the construction period of the wind turbine generator is shortened; meanwhile, after identifying which blade 4 is heavier or lighter, the counter weight of the blade 4 or other blades 4 can be adjusted conveniently by workers, so that measures can be adjusted in a targeted manner, and the efficiency is higher.
Further, when adjusting the size of the target code disc hole, the target code disc hole is usually reduced, and it is also ensured that the diameter of the reduced target code disc hole is larger than the diameter of the speed measuring sensor 2. So, the target code disc hole after diminishing just can produce the vibration attenuation when passing through tacho sensor 2, and the damping signal that produces is different with the vibration attenuation that produces when passing through other normal code disc holes to produce the difference on the main shaft rotational speed who records, be convenient for judge whether unbalanced and the target blade of wind turbine generator system's blade quality is overweight or lighter according to the rotational speed of main shaft.
Optionally, step S200 further includes:
step S100, judging whether the blade mass of the wind turbine generator is unbalanced or not according to the rotating speed of the main shaft, and if so, entering step S200.
When the mass of the blades of the wind turbine generator is balanced, in the process of uniform rotation of the wind wheel, the blades 4 rotate from the vertically downward position to the vertically upward position, and rotate from the vertically upward position to the vertically downward position, the rotating speeds of the main shafts are almost the same, and even if the rotating speeds fluctuate, the fluctuation is small, so that the rotating speed of the main shafts is basically stabilized near a certain fixed value; when the blade mass of the wind turbine generator is unbalanced, as mentioned above, the rotation speed of the main shaft fluctuates greatly, so that whether the blade mass of the wind turbine generator is unbalanced or not can be judged according to the rotation speed of the main shaft.
Optionally, step S100 includes the steps of:
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the time change according to the rotating speed of the main shaft;
judging whether the curve of the variation trend of the rotating speed is changed in a sine wave manner or a horizontal line manner;
if the rotating speed variation trend curve is changed in a sine wave manner, judging that the blade mass of the wind turbine generator is unbalanced; and if the rotating speed variation trend curve is changed in a horizontal line, judging the mass balance of the blades of the wind turbine generator.
In this embodiment, when the mass of the blades of the wind turbine generator is balanced, in the process of uniform rotation of the wind wheel, a curve of the rotation speed variation trend of the rotation speed of the main shaft along with the time variation is approximately a horizontal line, as shown in fig. 4, the rotation speed of the main shaft is represented in the longitudinal direction of the graph, and the time is represented in the transverse direction of the graph; when the mass of the blades of the wind turbine generator is unbalanced, the rotating speed of the main shaft is influenced by the gravity of the blades due to the eccentric action, so that the rotating speed variation trend curve of the rotating speed of the main shaft along with the time variation is approximately in a sine wave shape, as shown in fig. 5. Therefore, whether the blade mass of the wind turbine generator is unbalanced or not is accurately and visually judged by analyzing whether the rotating speed variation trend curve of the main shaft is in sine wave variation or horizontal line variation, and the method is simple in logic and convenient to operate.
Alternatively, in step S200, the size of the target code wheel hole is adjusted by providing the metal sheet 3 at the target code wheel hole.
As shown in fig. 6 and 7, no matter the blade mass of the wind turbine is balanced or unbalanced, when the size of a certain code disc hole on the speed measurement code disc 1 is changed and the code disc hole passes through the speed measurement sensor 2, the speed measurement sensor 2 can detect an attenuation signal different from that when other normal code disc holes pass through the speed measurement sensor 2, that is, the measured rotating speed of the main shaft can have an obvious jump amount, and the jump amount of the rotating speed at the moment is also the maximum. However, when the blade mass of the motor set is balanced or unbalanced, the rotating speed variation trend curves of the main shaft are different, so that the positions of the maximum jump variable of the rotating speed on the rotating speed variation trend curves are different, and whether the target blade is heavier or lighter can be judged according to the rotating speed of the main shaft after the size of the target code disc hole is changed. The size of the target code disc hole can be changed into the speed measuring code disc 2, so that the size of each code disc hole of the speed measuring code disc 2 can be automatically adjusted according to the use requirement, and the changing cost can be increased. The size of the target code wheel hole can also be changed by arranging a member made of magnetic material, such as the metal sheet 3, at the target code wheel hole, and removing the metal sheet 3 after use. In the embodiment, the metal sheet 3 is preferably arranged at the target code disc hole to adjust the size of the target code disc hole, so that the structure of the speed measuring code disc 2 is not required to be changed, the modification cost is saved, and the implementation is easy.
Optionally, the nominal angle is 90 °.
In this embodiment, the included angle between the radial direction of the target code disc hole and the target blade on the vertical plane perpendicular to the main shaft is set to 90 °, so that when the target code disc hole passes through the speed measuring sensor 2, the target blade just rotates to the vertical downward position. At this time, if the mass of the target blade is heavier, the measured rotating speed of the main shaft is the largest, and meanwhile, because the size of the target code disc hole is changed, the speed measuring sensor 2 can detect an obvious jump amount, that is, the maximum jump amount of the rotating speed of the main shaft appears when the rising trend of the rotating speed of the main shaft reaches the maximum, namely appears at the peak of the rotating speed variation trend curve of the main shaft. Similarly, at this time, if the mass of the target blade is lighter, the maximum jump amount of the rotation speed of the main shaft occurs when the rotation speed decrease trend of the main shaft reaches the maximum, that is, occurs at the trough of the rotation speed change trend curve of the main shaft. At this time, if the mass of the target blade is neither heavy nor light, the maximum jump amount of the main shaft rotation speed does not appear at the position where the main shaft rotation speed increasing trend reaches the maximum or the main shaft rotation speed decreasing trend reaches the maximum, but appears at other positions except the peak and the trough on the rotation speed variation trend curve of the main shaft. When the calibration angle is a special phase angle of 30 °, 45 ° or 60 °, if the mass of the target blade is heavier and the target code disk hole passes through the speed measurement sensor 2, the speed measurement sensor 2 detects an obvious jump amount, but the target blade does not rotate to a vertical downward position at this time, that is, the maximum jump amount of the rotation speed is not at the peak of the rotation speed variation trend curve, and at this time, it is necessary to determine that the target blade is heavier, lighter or normal by performing certain conversion and analysis according to the calibration phase angle between the radial direction of the target code disk hole and the target blade, and the determination process is not intuitive and complicated. Therefore, the calibration angle is set to 90 degrees in the embodiment, so that whether the target blade is heavier or lighter can be judged more intuitively according to the rotating speed of the main shaft.
Optionally, as shown in fig. 1 and fig. 2, step S400 includes the following steps:
step S410, drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time according to the obtained rotating speed of the main shaft;
step S420, judging whether the maximum jump variable of the rotating speed is positioned at the wave crest, the wave trough or other positions of the drawn rotating speed change trend curve;
step S430, if the maximum jump quantity of the rotating speed is located at other positions of the drawn rotating speed change trend curve, a target code disc hole is designated on the speed measuring code disc 1 again, the size of the target code disc hole is adjusted, the next blade 4 of the wind turbine generator is designated as a target blade, and the step S300 is skipped simultaneously;
step S440, if the maximum jump quantity of the rotating speed is located at the peak of the drawn rotating speed change trend curve, judging that the mass of the target blade is heavier;
and S450, if the maximum jump quantity of the rotating speed is positioned at the trough of the drawn rotating speed change trend curve, judging that the target blade is lighter in weight.
In this embodiment, on the basis that the included angle between the radial direction where the target dial hole is located and the target blade on the vertical plane perpendicular to the main shaft is 90 °, the steps S410 to S450 are performed to recognize whether the mass of the target blade is heavy, light or normal according to the rotation speed of the main shaft.
Optionally, as shown in fig. 1 and fig. 2, after step S440 and step S450, the method further includes:
and step S460, restoring the size of the target code disc hole to the size before adjustment, adjusting the size of the code disc hole on the speed-measuring code disc 1, which is positioned on the same radial direction as the target code disc hole, and simultaneously skipping to the step S300.
In this embodiment, when the mass of the target blade is determined to be heavy or light, the size of the code wheel hole opposite to the target code wheel hole may be changed, and the rotation speed of the spindle may be measured again, where the measured data may have an opposite phase. Taking the mass of the target blade as an example, when the code wheel hole in the direction opposite to the original target code wheel hole changes in size and passes through the speed measuring sensor 2, the target blade rotates to the vertically upward position, and the maximum jump amount of the measured rotating speed appears at the trough of the rotating speed change trend curve. In this way, it can be verified whether the determinations in step S440 and step S450 are accurate, thereby further improving the accuracy of the determination.
Optionally, as shown in fig. 1 and fig. 2, after step S400, the method further includes:
and S500, when the mass of the target blade is heavier or lighter, adjusting the balance weight of the target blade or other blades until the mass of the blades of the wind turbine generator is balanced.
In this embodiment, after determining which blade 4 of the wind turbine generator system is heavier or lighter, it may be tried to reduce the counter weight of this blade 4 or increase the counter weights of other blades 4 for a plurality of times, and then the blade mass of the wind turbine generator system is gradually adjusted through step S300 and step S400 until the blade mass reaches balance, so as to eliminate the situation of the left and right vibrations of the wind turbine generator system caused by the unbalanced blade mass.
Optionally, step S500 includes the steps of:
when the mass of the target blade is heavier, reducing the counterweight of the target blade or increasing the counterweights of other blades, and when the mass of the target blade is lighter, increasing the counterweight of the target blade or reducing the counterweights of other blades;
obtaining the rotating speed of the main shaft again;
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time again according to the rotating speed of the main shaft obtained again;
judging whether the re-drawn speed change trend curve is changed in a horizontal line or not;
and if the re-drawn speed change trend curve is changed in a horizontal straight line, judging that the blade quality of the wind turbine generator is balanced.
In this embodiment, after determining which blade 4 of the wind turbine generator system is heavier or lighter, the blade mass of the wind turbine generator system may be determined to be balanced by adjusting the counter weight of the target blade or the counter weights of the other blades for a plurality of times, measuring the rotation speed of the main shaft again after each adjustment, and simultaneously drawing a rotation speed variation trend curve until the rotation speed variation trend curve corresponding to the measured rotation speed of the main shaft is substantially horizontal and linear.
Referring to fig. 8, another embodiment of the present invention provides a blade mass unbalance recognition apparatus, including:
the adjusting module 10 is used for designating a target code disc hole on the speed measuring code disc 1 and adjusting the size of the target code disc hole, designating any blade 4 of the wind turbine generator as a target blade, and enabling an included angle between the radial direction where the target code disc hole and the target blade are located and on a vertical plane perpendicular to the main shaft to be a calibration angle;
an obtaining module 20, configured to obtain a rotation speed of the spindle;
and the judging module 30 is configured to judge whether the mass of the target blade is heavier or lighter according to the acquired rotation speed of the main shaft.
In this embodiment, a target code disc hole is designated on the speed measurement code disc 1 through the adjusting module 10, the size of the target code disc hole is adjusted, meanwhile, any blade 4 of the wind turbine generator is designated as a target blade, an included angle between the target blade and the radial direction of the target code disc hole when the target blade rotates to the vertical downward position is a calibration angle, the included angle is perpendicular to the vertical plane of the main shaft, then the rotating speed of the main shaft is obtained through the obtaining module 20, and finally whether the mass of the target blade is heavy or light is judged through the judging module 30 according to the obtained rotating speed of the main shaft, so that which blade 4 is heavy or light is identified when the mass of the blades of the wind turbine generator is unbalanced. The operation is simple, the measuring device of the wind turbine generator is directly utilized, a sensor or other detection equipment does not need to be arranged again, and the blade 4 does not need to be disassembled again for factory returning weighing and counterweight, so that whether the blade quality is balanced or not can be judged and identified after the blade 4 is hoisted, the production cost and the maintenance cost of the wind turbine generator are effectively reduced, and the construction period of the wind turbine generator is shortened; meanwhile, after identifying which blade 4 is heavier or lighter, the counter weight of the blade 4 or other blades 4 can be adjusted conveniently by workers, so that measures can be adjusted in a targeted manner, and the efficiency is higher.
Yet another embodiment of the invention provides a computer-readable storage medium, which stores a computer program, which when read and executed by a processor, implements a blade mass imbalance identification method as described above.
The technical solution of the embodiment of the present invention substantially or partly contributes to the prior art, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiment of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The method for identifying the mass unbalance of the blade is simple to operate, and the measuring device of the wind turbine generator is directly utilized, so that a sensor or other detection equipment does not need to be arranged again, and the blade 4 does not need to be dismounted again for factory return weighing and counterweight, so that whether the mass of the blade is balanced or not can be judged and identified after the blade 4 is hoisted, the production cost and the maintenance cost of the wind turbine generator are effectively reduced, and the construction period of the wind turbine generator is shortened; meanwhile, after identifying which blade 4 is heavier or lighter, the counter weight of the blade 4 or other blades 4 can be adjusted conveniently by workers, so that measures can be adjusted in a targeted manner, and the efficiency is higher.
The invention further provides a wind turbine generator, which includes a computer readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the blade mass imbalance identification method.
The wind turbine generator set in the embodiment comprises a computer readable storage medium storing a computer program, a processor, a tower, a cabin and a wind wheel, wherein the wind wheel comprises a main shaft and blades 4, a speed measuring coded disc 1 is sleeved on the main shaft, and a speed measuring sensor 2 is positioned near the speed measuring coded disc 1 and is horizontally arranged. Compared with the prior art, the wind turbine generator set in the embodiment and the blade mass imbalance identification method in the embodiment have the same beneficial effects, and are not repeated herein.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications are intended to fall within the scope of the invention.

Claims (9)

1. A blade mass unbalance identification method is characterized in that a speed measuring coded disc (1) is arranged on a main shaft of a wind wheel, a speed measuring sensor (2) corresponding to the speed measuring coded disc (1) is arranged on the wind wheel, and the speed measuring sensor (2) is horizontally arranged, and comprises the following steps:
a target code disc hole is designated on the speed measuring code disc (1), the size of the target code disc hole is adjusted, any blade (4) of the wind turbine generator is designated as a target blade, and an included angle between the target blade and the radial direction of the target code disc hole when the target blade rotates to the vertical downward position and the vertical plane perpendicular to the main shaft is a calibration angle;
acquiring the rotating speed of the main shaft;
judging whether the mass of the target blade is heavier or lighter according to the acquired rotating speed of the main shaft;
wherein the calibration angle is 90 °, and the determining whether the mass of the target blade is heavier or lighter according to the obtained rotation speed of the main shaft includes:
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time according to the obtained rotating speed of the main shaft;
judging whether the maximum jump variable of the rotating speed is positioned at the wave crest, the wave trough or other positions of the drawn rotating speed change trend curve;
if the maximum jumping amount of the rotating speed is located at other positions of the drawn rotating speed change trend curve, appointing the target code disc hole on the speed measuring code disc (1) again and adjusting the size of the target code disc hole, appointing the next blade (4) of the wind turbine generator as the target blade, and jumping to the step of obtaining the rotating speed of the main shaft;
if the maximum jump amount of the rotating speed is located at the peak of the drawn rotating speed variation trend curve, judging the mass weight of the target blade;
and if the maximum jump amount of the rotating speed is positioned at the trough of the drawn rotating speed variation trend curve, judging that the target blade is lighter in weight.
2. The blade mass unbalance identification method according to claim 1, wherein before the step of designating a target code disc hole on the speed measurement code disc (1) and adjusting the size of the target code disc hole, designating any one blade (4) of the wind turbine as a target blade, and making an included angle between the target blade and a radial direction where the target code disc hole is located when the target blade rotates to a vertically downward position and a vertical plane perpendicular to the main shaft be a calibration angle, the method further comprises:
and judging whether the blade mass of the wind turbine generator is unbalanced or not according to the rotating speed of the main shaft.
3. The blade mass imbalance identification method of claim 2, wherein the judging whether the blade mass of the wind turbine generator is unbalanced according to the rotation speed of the main shaft comprises:
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time according to the rotating speed of the main shaft;
judging whether the rotating speed variation trend curve is changed in a sine wave manner or a horizontal line manner;
if the rotating speed variation trend curve is changed in a sine wave manner, judging that the blade mass of the wind turbine generator is unbalanced; and if the rotating speed variation trend curve is changed in a horizontal line, judging the mass balance of the blades of the wind turbine generator.
4. Blade mass unbalance identification method according to claim 1, characterized in that in the adjusting the size of the target code wheel hole, the size of the target code wheel hole is adjusted by providing a metal sheet (3) at the target code wheel hole.
5. The blade mass unbalance identification method according to claim 1, wherein after determining that the target blade has a heavy mass if the maximum jump amount of the rotation speed is located at a peak of the plotted rotation speed variation trend curve and determining that the target blade has a light mass if the maximum jump amount of the rotation speed is located at a trough of the plotted rotation speed variation trend curve, the method further comprises:
and restoring the size of the target code disc hole to the size before adjustment, adjusting the size of the code disc hole on the speed measuring code disc (1) which is positioned on the same radial direction with the target code disc hole, and simultaneously jumping to the step of acquiring the rotating speed of the main shaft.
6. The blade mass imbalance identification method of claim 1, wherein after determining whether the target blade is heavier or lighter according to the obtained rotation speed of the main shaft, the method further comprises:
and when the mass of the target blade is heavier or lighter, adjusting the balance weight of the target blade or other blades until the mass of the blades of the wind turbine generator reaches balance.
7. The blade mass imbalance identification method of claim 6, wherein the adjusting the counterweight of the target blade or other blades until the blade mass of the wind turbine generator is balanced comprises:
when the mass of the target blade is heavier, reducing the counterweight of the target blade or increasing the counterweight of other blades, and when the mass of the target blade is lighter, increasing the counterweight of the target blade or reducing the counterweight of other blades;
obtaining the rotating speed of the main shaft again;
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time again according to the rotating speed of the main shaft obtained again;
judging whether the re-drawn curve of the change trend of the rotating speed is changed in a horizontal straight line or not;
and if the re-drawn curve of the variation trend of the rotating speed is changed in a horizontal straight line, judging that the quality of the blades of the wind turbine generator is balanced.
8. A blade mass imbalance identification device, comprising:
the adjusting module (10) is used for appointing a target code disc hole on the speed measuring code disc (1), adjusting the size of the target code disc hole, appointing any blade (4) of the wind turbine generator as a target blade, and enabling an included angle between the target blade and the radial direction of the target code disc hole when the target blade rotates to the vertical downward position to be a calibration angle on a vertical plane perpendicular to the main shaft;
an acquisition module (20) for acquiring the rotation speed of the main shaft;
the judging module (30) is used for judging whether the mass of the target blade is heavier or lighter according to the acquired rotating speed of the main shaft;
wherein the calibration angle is 90 °, and the determination module (30) is specifically configured to:
drawing a rotating speed change trend curve of the rotating speed of the main shaft along with the change of time according to the obtained rotating speed of the main shaft;
judging whether the maximum jump variable of the rotating speed is positioned at the wave crest, the wave trough or other positions of the drawn rotating speed change trend curve;
if the maximum jumping amount of the rotating speed is located at other positions of the drawn rotating speed change trend curve, appointing the target code disc hole on the speed measuring code disc (1) again and adjusting the size of the target code disc hole, appointing the next blade (4) of the wind turbine generator as the target blade, and jumping to the step of obtaining the rotating speed of the main shaft;
if the maximum jump amount of the rotating speed is located at the peak of the drawn rotating speed variation trend curve, judging the mass weight of the target blade;
and if the maximum jump amount of the rotating speed is positioned at the trough of the drawn rotating speed variation trend curve, judging that the target blade is lighter in weight.
9. Wind turbine comprising a processor and a computer-readable storage medium having stored thereon a computer program which, when read and executed by the processor, carries out a blade mass imbalance identification method according to any one of claims 1 to 7.
CN202111006170.7A 2021-08-30 2021-08-30 Blade mass unbalance identification method and device and wind turbine generator Active CN113530766B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111006170.7A CN113530766B (en) 2021-08-30 2021-08-30 Blade mass unbalance identification method and device and wind turbine generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111006170.7A CN113530766B (en) 2021-08-30 2021-08-30 Blade mass unbalance identification method and device and wind turbine generator

Publications (2)

Publication Number Publication Date
CN113530766A CN113530766A (en) 2021-10-22
CN113530766B true CN113530766B (en) 2022-11-15

Family

ID=78092282

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111006170.7A Active CN113530766B (en) 2021-08-30 2021-08-30 Blade mass unbalance identification method and device and wind turbine generator

Country Status (1)

Country Link
CN (1) CN113530766B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101576425B (en) * 2009-06-18 2010-09-22 北京理工大学 Measuring method for static balance of turbine vane wheel and device thereof
CN102661786B (en) * 2012-05-22 2013-09-04 国电联合动力技术有限公司 Method for acquiring and analyzing rotor vibration signal of variable-rotation wind generation set
CN105569932B (en) * 2016-01-08 2018-10-12 新疆金风科技股份有限公司 Wind turbines dynamic unbalance on-line checking and fault identification method and system
CN205669464U (en) * 2016-05-26 2016-11-02 华北电力大学 A kind of impeller of wind turbine set imbalance test system
CN110905732B (en) * 2018-09-17 2021-03-23 中车株洲电力机车研究所有限公司 Method and system for identifying unbalance of wind wheel of wind turbine generator and storage medium

Also Published As

Publication number Publication date
CN113530766A (en) 2021-10-22

Similar Documents

Publication Publication Date Title
US5219454A (en) Method and apparatus for balancing wind turbine rotors
CN109115408B (en) Dynamic balance test method of large hydroelectric generating set based on centrifugal force equation
CN201514306U (en) Dynamic balance testing device
CN104296927B (en) Electric main shaft dynamic balance performance test experimental system
US11422052B2 (en) System and method for diagnosing a rotor unbalance of a wind turbine
CN110905732B (en) Method and system for identifying unbalance of wind wheel of wind turbine generator and storage medium
CN107389268B (en) A kind of multiple spot spot dynamic balance method based on fast algorithm
CN104111154B (en) Vibration trend analysis method and vibration trend analysis system of wind generating set
CN106323548A (en) Double vibration sensor-based rotor imbalance vibration response identification method
CN109540482A (en) A kind of turbine blade is without the mutually high frequency multiplication synchronous vibration parameters analysis method of key and analytical equipment
CN113530766B (en) Blade mass unbalance identification method and device and wind turbine generator
CN109085375B (en) Key phase pulse signal monitoring method and device for rotary machine
CN108693774B (en) Method for predicting comprehensive performance of electric spindle
CN110646138A (en) Dynamic balance method and analysis device for rotary machine without key phase and trial weight
CN105512369B (en) Vold-Kalman filtering bandwidth method for optimizing based on order spectrum
CN1206791C (en) Method for determining weight phase for calibrating dynamic balance of vertical water turbine generator rotor
CN109531270B (en) Modal testing method of numerical control machine tool feeding system based on built-in sensor
CN114838872B (en) Method for monitoring dynamic balance of hypergravity centrifuge for long time
CN116429321A (en) Turbine blade mass moment measuring method and device
CN103033257B (en) Measuring method for vibration state of antifriction bearing
CN114414144A (en) Dynamic balancing machine control method for detecting motion state of motor rotor
CN112945535B (en) Rotating machinery fault detection method and device based on numerical simulation
CN1456870A (en) Fan rotor dynamic balance calibrating method and device
CN202332064U (en) Dynamic balance training device for motor rotor
CN104483067A (en) Measuring method of dynamic unbalance amount of fan

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant