CN217403695U - Intelligent online dynamic balancing device for large wind turbine blade - Google Patents
Intelligent online dynamic balancing device for large wind turbine blade Download PDFInfo
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- CN217403695U CN217403695U CN202221336796.4U CN202221336796U CN217403695U CN 217403695 U CN217403695 U CN 217403695U CN 202221336796 U CN202221336796 U CN 202221336796U CN 217403695 U CN217403695 U CN 217403695U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses an online dynamic balance device of large-scale wind turbine blade intelligence relates to wind power generation machine dynamic balance technical field, include: the linear driving device is fixed on the blade of the wind turbine; the balance sliding block is arranged on the linear driving device, and the linear driving device is used for driving the balance sliding block to do reciprocating linear motion along the blade of the wind turbine; the detection device comprises a vibration sensor, and the vibration sensor is arranged on a hub of the wind turbine; the controller, the linear driving device and the detection device are all electrically connected with the controller. The utility model discloses utilize linear drive device to adjust the position of balanced slider to the mass distribution of adjustment each blade, in order to reach blade dynamic balance's purpose.
Description
Technical Field
The utility model relates to a wind turbine dynamic balance technical field especially relates to an online dynamic balance device of large-scale wind energy conversion system blade intelligence.
Background
Large-scale aerogenerator easily suffers the impact damage of external hard objects such as icing, sand and dust pile up, hail, sand and dust at the in-service in-process blade, causes blade unbalanced mass for engine rotor system produces the vibration problem, if can't obtain effective control, long-time accumulation can cause the generator generated energy not enough, and the service life shortens, and serious probably produces the incident, thereby causes great economic loss.
The vibration control problem of the active large-scale wind driven generator mostly adopts the off-line dynamic balance of a field method, advanced technologies such as machine vision, optical fiber sensing, unmanned aerial vehicle deicing and the like are adopted at home and abroad in recent years, but the defects of low reliability, unsatisfactory balance effect, long operation time, high maintenance cost and the like in different degrees exist, and the currently mature engineering dynamic balance technology mainly has two modes: one is dynamic balance on site, and the other is dynamic balance on machine.
The dynamic balance on the machine generally adopts a large dynamic balancing machine to carry out the dynamic balancing process on the rotor, is usually used for the balance detection and correction of the rotor in production and manufacturing, and can effectively eliminate the original unbalance formed when the rotor is processed and assembled; in general, in field dynamic balance, a field dynamic balancer is used to perform dynamic balance on a rotor under the working condition of a rotating mechanical original unit, and the field dynamic balancer is generally used for testing and correcting the dynamic balance of the whole machine after the rotor is installed.
Although various kinds of dynamic balance products on a computer on the current market can meet the dynamic balance requirements of rotors of various mechanical systems, the following three defects still exist. The dynamic balance on the machine can only implement the dynamic balance after disassembling the rotor of the rotating machine, can only correct the unbalance amount of the rotor, and lacks the balance countermeasures for the unbalance of the rotor under the influence of the bearing condition of a mechanical system and the actual installation working condition of the rotor. And after the rotor after off-line balance is subjected to operation links such as transportation, reinstallation and the like, the balance precision before formal service cannot be guaranteed. Therefore, unbalanced vibration may still be generated when the rotor is operated under operating conditions. For some special rotors, the dynamic balance on the ordinary machine obviously cannot meet the balance requirement. For example, the rotor of a large hydroelectric and nuclear power unit is too large in weight and size, and off-line balance correction is hardly performed on the rotor by on-board balance equipment matched with the rotor; in addition, when the high-temperature turbine rotor is in operation, due to the fact that the high temperature is high, elastic buckling deformation is easy to generate, and the deformation phenomenon disappears after the high-temperature turbine rotor is shut down, so that special thermodynamic balance needs to be carried out on the high-temperature turbine rotor. Because the dynamic balancing machine on the machine is usually large in size and weight, the dynamic balancing machine is generally fixedly arranged in places such as factories and workshops. When the on-machine balance is implemented, the rotor needs to be disassembled from the system, and then the rotor is transported to the balancing machine to be installed and then the balance correction is carried out, and the balancing method takes a long time and is not economical in consideration of the fact that the steps of starting and stopping the rotor system and the disassembling process are complicated.
Therefore, a new wind turbine blade dynamic balancing device is urgently needed in the market for solving the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an online dynamic balance device of large-scale wind energy conversion system blade intelligence for solve the technical problem that exists among the above-mentioned prior art, utilize step motor to adjust the position of balanced slider, thereby adjustment vane's mass distribution has reached blade dynamic balance's technological effect, whole process easy operation.
In order to achieve the above object, the utility model provides a following scheme:
the utility model discloses an online dynamic balance device of large-scale wind energy conversion system blade intelligence, include:
the linear driving device is fixed on a blade of the wind turbine;
the balance sliding block is arranged on the linear driving device, and the linear driving device is used for driving the balance sliding block to do reciprocating linear motion along the blade of the wind turbine;
the detection device comprises a vibration sensor, and the vibration sensor is arranged on a hub of the wind turbine;
and the linear driving device and the detection device are electrically connected with the controller.
Preferably, the linear driving device comprises a stepping motor and a screw rod, the stepping motor is fixed on a blade of the wind turbine, one end of the screw rod is in transmission connection with an output shaft of the stepping motor, a threaded hole is formed in the balance sliding block, an internal thread is arranged at the threaded hole, an external thread is arranged on the outer wall of the screw rod, the screw rod is in threaded connection with the threaded hole, and the stepping motor is electrically connected with the controller.
Preferably, two limit baffles are arranged on a blade of the wind turbine and are respectively positioned at two ends of the screw rod, and the two limit baffles are used for limiting the displacement of the balance slide block.
Preferably, the stepping motor is a band-type brake stepping motor.
Preferably, the detection device further comprises a photoelectric sensor, the photoelectric sensor is fixed on the wind turbine, and the photoelectric sensor is electrically connected with the controller.
Preferably, the controller is a computer.
The utility model discloses for prior art gain following technological effect:
1. the size and the position of the unbalance can be known through data acquisition of the vibration sensor and calculation of the controller without complicated operation by manpower;
2. the whole device has simple structure and low manufacturing cost;
3. after receiving a control signal of the controller, the balance slide block can quickly correspond to the control signal, so that the technical effect of quickly realizing dynamic balance of the blade is achieved;
4. the stepping motor is a band-type brake stepping motor and can lock the balance slide block at a predicted position;
5. set up limit baffle and can restrict the displacement range of balanced slider, prevent that it from deviating from.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an intelligent online dynamic balancing device for a large wind turbine blade according to an embodiment;
FIG. 2 is a schematic view of a third embodiment of a method for calculating a direction of a rotor to be balanced;
FIG. 3 is an exploded view of a rotor with a balance weight according to the third embodiment;
FIG. 4 is an exploded view of the vector for balancing in the third embodiment;
in the figure: 1-a hub; 2-a limit baffle; 3-balancing the slide block; 4-a screw rod; 5-blade.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing an online dynamic balance device of large-scale wind energy conversion system blade intelligence for solve the technical problem that exists among the above-mentioned prior art, utilize step motor to adjust the position of balanced slider, thereby adjustment vane's mass distribution has reached blade dynamic balance's technological effect, whole process easy operation.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The first embodiment,
As shown in fig. 1, the present embodiment provides an intelligent online dynamic balancing apparatus for a large wind turbine blade, including:
the linear driving device is fixed on the blades 5 of the wind turbine, generally, three blades 5 are arranged on each wind turbine, and one linear driving device is required to be arranged on each blade 5;
the balance sliding block 3 is a common rectangular block, the balance sliding block 3 is arranged on a linear driving device, one linear driving device is connected with one balance sliding block 3, the linear driving device is used for driving the balance sliding block 3 to do reciprocating linear motion along the length direction of a blade 5 of a wind turbine, and the balance sliding block 3 is in sliding connection with the blade 5;
the detection device comprises a vibration sensor, the vibration sensor is arranged on a hub 1 of the wind turbine, and the hub 1 of the wind turbine is an installation part (the end part of a central rotating shaft) of the blade 5;
the controller, the linear driving device and the detection device are electrically connected with the controller, and the controller is used for receiving detection signals sent by the detection device and calculating the detection signals so as to control the operation of the linear driving device.
In actual use, the amplitude value detected by the vibration sensor is used for transmitting data to the controller, and the controller is used for calculating the displacement required by the balance slide block 3 to move when the dynamic balance of the blades 5 is achieved. And then driving the controller, wherein the controller adjusts the specific positions of the balance sliding blocks 3 through a linear driving device, and after the specific positions of the three balance sliding blocks 3 are adjusted according to the calculation result, the technical effect of dynamic balance of the blades 5 can be achieved.
In this embodiment, the linear driving device includes a step motor and a screw rod 4, the step motor is fixed on a blade 5 of the wind turbine, one end of the screw rod 4 is in transmission connection with an output shaft of the step motor, a threaded hole is formed in the balance sliding block 3, an internal thread is formed in the threaded hole, an external thread is formed on the outer wall of the screw rod 4, and the screw rod 4 is in threaded connection with the threaded hole, so that a common screw rod nut pair structure is formed. The stepping motor is electrically connected with the controller, and the controller can be used for controlling the starting and closing, the forward rotation and the reverse rotation of the stepping motor. During the use, utilize controller control step motor to start, step motor drives lead screw 4 and rotates, balanced slider 3 and blade 5 sliding connection (balanced slider 3 and blade 5 direct contact, so when lead screw 4 rotates, because blade 5's limiting displacement, can not make balanced slider 3 and lead screw 4 synchronous rotation), thereby make balanced slider 3 along the 4 back-and-forth movements of lead screw, thereby realize the technological effect of the position of adjustment balanced slider 3. The power supply of the stepping motor is connected with a main power supply inside the wind turbine through the conductive slip ring and the electric brush, the specific connection relationship is the prior art, and therefore repeated description is omitted, the center of the hub 1 is of a hollow structure, and therefore a connected electric wire can conveniently penetrate through the hub. In addition, the linear driving device may be replaced by other structures, such as an air cylinder or a hydraulic cylinder, as long as the balance block 3 can slide linearly on the blade 5.
In this embodiment, the blade 5 of the wind turbine is provided with two limit baffles 2, the two limit baffles 2 are respectively located at two ends of the screw rod 4, and the two limit baffles 2 are used for limiting the displacement of the balance slide block 3. Specifically, set up a limit switch on every limit baffle 2, limit switch is connected with the controller electricity, and near when balanced slider 3 moved limit switch, limit switch detected balanced slider 3's position signal to with position signal transmission on the controller, then control balanced slider 3's operation through the controller again.
In this embodiment, the stepping motor is a band-type brake stepping motor. When the power is lost, the output shaft of the stepping motor can not rotate, and the position of the balance slide block 3 is kept still.
In this embodiment, the detection device further includes a photoelectric sensor, the photoelectric sensor is fixed on the wind turbine, and may be fixed on a stator of the wind turbine, or may be fixed on the support main body, and the photoelectric sensor is electrically connected to the controller. In the actual measurement process, the rotation speed of the blades 5 should be kept constant all the time, and the photoelectric sensor is used for detecting the rotation speed of the blades 5, so that the measurement and the adjustment are convenient.
In this embodiment, the controller is a computer, but may be another type of control device. Preferably, the controller is a control system with the control system of the wind turbine itself, which facilitates operation.
Example II,
The embodiment provides a use method of an intelligent online dynamic balancing device for a large wind turbine blade, which comprises the following steps:
1. firstly, the vibration sensor is used to detect the amplitude value and judge whether the amplitude value is larger than the set value A 0 ；
2. When the amplitude value is greater than the set value a0, the first blade 5, the second blade 5 and the third blade 5 are respectively moved to the positions of S1, S2 and S3 (it should be noted that the positions of S1, S2 and S3 are established by taking the hub 1 as the center and drawing a circle with the original amplitude a0 generally enlarged by 1000 times as the radius to intersect the radial lines corresponding to three blades 5 at S1, S2 and S3);
3. obtaining the added balance quantity Q by drawing a circle by a three-point method;
4. decomposing the Q vector to two adjacent blades 5, namely Q1 and Q2, and converting the Q vector into r1 and r2 of the position of the balance slide block 3;
5. the balance slide block 3 on two adjacent blades 5 is controlled by the controller to move to reach the expected positions r1 and r 2;
6. measuring a vibration response value A1 after stabilization, and if the amplitude value is still larger than A0, repeating the processes in the steps 2-5; if the amplitude value is less than A0, the dynamic balancing process is completed.
Example III,
As shown in fig. 2 to 3, this embodiment provides a specific drawing method of the three-point method in the second embodiment, which includes the following steps:
1. radial lines A, B, C corresponding to the three blades 5 as end faces are led out from the wind power generator by taking the hub 1 as the center, and the three end faces AB, BC and CA are regarded as a first phase, a second phase and a third phase corresponding to the three phases;
2. taking the hub 1 as a center, generally drawing a circle by taking 1000 times of expansion of original amplitude A0 as a radius, and intersecting radial lines corresponding to the three blades 5 with S1, S2 and S3;
3. controlling the balance slide block 3 to move to S1, taking S1 as the center of a circle, measuring the amplitude A01 and A0 at the moment to expand the same proportion, taking A01 as the radius to draw a circle, taking S2 and S3 as the center of a circle and taking the corresponding amplitude A02 and A03 as the radius to respectively draw a circle or an arc according to the sequence, wherein three circles (not representing complete circles in the figure, only representing arcs) are intersected at a point B, and the OB direction is the direction of the rotor to be added with balance weight;
4. inversely obtaining the amplitude A1 corresponding to the OB according to a scale, wherein A1 is the amplitude caused by the trial weight P;
5. calculating the added balance Q as PA 0/A1;
6. the weighting direction is shown in fig. 3, taking S1 as a starting point, clockwise rotating by an angle theta, and is the direction of the balance to be added;
the point B is shown in which phase the balance quantity Q is to be added to be decomposed to the corresponding linear driving device in the blade 5, and at the moment, the controller controls the stepping motor to enable the balance sliding blocks 3 on the three blades 5 to respectively move to the corresponding positions on the lead screw.
FIG. 4 is a vector exploded view of the amount to be balanced, wherein r1 and r2 are the positions to be moved by the same phase slide after vector decomposition;
the mass-diameter product represents that the relative magnitude and direction of each centrifugal inertia force on the rotor are vectors, wherein Q is the amount of balance to be added; m is the mass of the sliding block;
is composed of
Decomposing into a mass-diameter product on the x-axis;
is composed of
Decomposing into a mass-diameter product on the y-axis;
is the vector that should be added during drawing.
The specific calculation process is as follows:
∠AOS2＝120°-(90°-θ)-θ＝30°；
r can be obtained by the above calculation 1 And r 2 Then the controller can adjust the specific value of the balance sliding block 3 on the two adjacent blades 5 to slide according to the calculation.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. The utility model provides an online dynamic balance device of large-scale wind turbine blade intelligence which characterized in that includes:
the linear driving device is fixed on a blade of the wind turbine;
the balance sliding block is arranged on the linear driving device, and the linear driving device is used for driving the balance sliding block to do reciprocating linear motion along the blade of the wind turbine;
the detection device comprises a vibration sensor, and the vibration sensor is arranged on a hub of the wind turbine;
and the linear driving device and the detection device are electrically connected with the controller.
2. The intelligent online dynamic balancing device for the large-scale wind turbine blade as claimed in claim 1, wherein: the linear driving device comprises a stepping motor and a screw rod, the stepping motor is fixed on a blade of a wind turbine, one end of the screw rod is in transmission connection with an output shaft of the stepping motor, a threaded hole is formed in the balance sliding block, an internal thread is formed in the threaded hole, an external thread is formed in the outer wall of the screw rod, the screw rod is in threaded connection with the threaded hole, and the stepping motor is electrically connected with the controller.
3. The intelligent online dynamic balancing device for the large-scale wind turbine blade as claimed in claim 2, wherein: two limit baffles are arranged on the blade of the wind turbine and are respectively positioned at two ends of the screw rod, and the two limit baffles are used for limiting the displacement of the balance slide block.
4. The intelligent online dynamic balancing device for the large-scale wind turbine blade as claimed in claim 2, wherein: the stepping motor is a band-type brake stepping motor.
5. The intelligent online dynamic balancing device for the large-scale wind turbine blade as claimed in claim 1, wherein: the detection device further comprises a photoelectric sensor, the photoelectric sensor is fixed on the wind turbine and electrically connected with the controller.
6. The intelligent online dynamic balancing device for the large-scale wind turbine blade as claimed in claim 1, wherein: the controller is a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221336796.4U CN217403695U (en) | 2022-05-31 | 2022-05-31 | Intelligent online dynamic balancing device for large wind turbine blade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221336796.4U CN217403695U (en) | 2022-05-31 | 2022-05-31 | Intelligent online dynamic balancing device for large wind turbine blade |
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| CN217403695U true CN217403695U (en) | 2022-09-09 |
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| CN202221336796.4U Active CN217403695U (en) | 2022-05-31 | 2022-05-31 | Intelligent online dynamic balancing device for large wind turbine blade |
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