CN207513745U - Variable pitch position-limiting unit, structure and the leaf position detection device of wind power generating set - Google Patents
Variable pitch position-limiting unit, structure and the leaf position detection device of wind power generating set Download PDFInfo
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- CN207513745U CN207513745U CN201721185484.7U CN201721185484U CN207513745U CN 207513745 U CN207513745 U CN 207513745U CN 201721185484 U CN201721185484 U CN 201721185484U CN 207513745 U CN207513745 U CN 207513745U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model embodiment provides a kind of variable pitch position-limiting unit of wind power generating set, structure and leaf position detection device, wherein, wind power generating set includes blade mounting arrangement and pitch variable bearings inner ring, and the variable pitch position-limiting unit of wind power generating set includes：The metal tape group and signal trigger circuit that the roller devices being arranged on blade mounting arrangement, the metal tape comprising two isolation settings being arranged on pitch variable bearings inner ring form, the metal tapes of described two isolation settings are connected in the signal trigger circuit；When the roller devices are rotated to the blade mounting arrangement with the metal tape group face, the roller devices contact the metal tape of two isolation in the metal tape group, two metal tapes are conductively connected, and triggers the signal trigger circuit and generates detection signal.Scheme provided by the utility model can accurately detect the position of blade, avoid or reduce wrong report and shut down, improve the safety of running of wind generating set.
Description
Technical Field
The utility model relates to a wind-powered electricity generation technical field especially relates to a wind generating set's spacing unit of change oar, structure and blade position detection device.
Background
In a wind generating set (called a wind generating set for short), a variable pitch system realizes important functions of maximum power tracking and pneumatic braking by adjusting the position (also called a pitch angle) of a blade, and the reliability of the variable pitch system is directly related to the safety of the wind generating set. Therefore, accurate measurement and protection of the position of the blade are essential important links for ensuring the normal operation of the wind turbine generator.
For a pitch system of a wind turbine generator driven by a toothed belt, the transmission mode is that teeth and gear teeth are meshed to transmit motion and power, and the gears are not meshed through the gear teeth, so that the actual angle of a blade is difficult to detect.
Currently, for a pitch system using a toothed belt transmission, a method for determining a position of a blade is to detect a proximity switch at a plurality of angular positions (generally, two angles, such as 5 degrees and 87 degrees) through a stop, so as to determine whether an actual position of the blade reaches an expected position, where the detection method is as follows: when the angle value measured by the encoder is near the expected position, and the proximity switch signal of the angle corresponding to the expected position is not triggered, the wind turbine generator is considered to be in fault, and the wind turbine generator is shut down in feathering mode. However, this method also has the following disadvantages:
the detection distance of the proximity switch is generally short, and when the distance between the proximity switch and the stop block is increased, or the proximity switch fails, or a circuit of the proximity switch is loosened, the wind driven generator is triggered to fail, and then the wind turbine generator is possibly mistakenly reported to stop the wind turbine generator, or potential safety hazards exist in the operation of the wind turbine generator.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a pair of wind generating set's spacing unit of change oar, structure and blade position detection device can accurately detect the position of blade, avoids or reduces the wrong report and shuts down, improves the security of wind generating set operation.
In order to achieve the above object, an embodiment of the utility model provides a wind generating set's the spacing unit of change oar, wind generating set includes blade installation device and changes oar bearing inner circle, include: the device comprises a roller device arranged on the blade mounting device, a metal band group and a signal trigger circuit, wherein the metal band group is arranged on the variable-pitch bearing inner ring and comprises two metal bands which are arranged in an isolated mode; when the roller device rotates along with the blade mounting device to be aligned with the metal strip group, the roller device contacts two isolated metal strips on the metal strip group, so that the two metal strips are in conductive connection, and the signal trigger circuit is triggered to generate a detection signal.
The embodiment of the utility model provides a wind generating set's change oar limit structure still provides, contains blade installation device and changes oar bearing inner circle, still includes: the variable pitch limiting units of the two groups of wind generating sets are as described above; the blade mounting device is provided with a roller device, two preset angles of the variable pitch bearing inner ring are correspondingly provided with a metal band group consisting of two metal bands which are separately arranged, and two signal trigger circuits, and the roller device, any one of the metal band groups and the signal trigger circuit in series connection with the metal band group form a variable pitch limiting unit of the wind generating set.
The embodiment of the utility model provides a still provide a wind generating set's blade position detection device, include: the wind generating set comprises an encoder, a controller and the variable pitch limiting structure of the wind generating set, wherein the encoder is arranged on a driving device of a variable pitch motor and used for detecting the rotating angle of a blade; the variable pitch limiting structure of the wind generating set is used for outputting a detection signal when the blades rotate to a preset angle; the controller is respectively connected with the encoder and the variable pitch limit structure of the wind generating set and used for acquiring the rotation angle of the blade and the information of the detection signal and determining the position of the blade according to the acquisition condition of the rotation angle and the detection signal.
The embodiment of the utility model provides a wind generating set's the spacing unit of change oar, structure and blade position detection device, it is by roller device to set up in the system of changing oar at the tooth belt structure, metal strip group and signal trigger circuit, produce the mode that switching signal realized blade position detection with the proximity switch who adopts in substituting prior art, its core thought is, utilize roller device when rotating along with blade installation device, contact metal strip group in preset angular position department, produce the detected signal with trigger signal trigger circuit, thereby realize the detection to this preset angle, the wind generating set wrong report of having avoided leading to because of proximity switch trouble or circuit failure shuts down, realize the accurate detection to changing oar system blade position.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic view of a prior art sensing system using proximity switches to measure blade position;
fig. 2 is a schematic view of a pitch limiting unit of a wind generating set according to an embodiment of the present invention;
fig. 3 is a schematic view of a pitch limiting unit of a wind generating set according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a signal trigger circuit according to an embodiment of the present invention;
FIG. 5 is a schematic view of a pitch limiting structure of a wind turbine generator system according to an embodiment of the present invention;
fig. 6 is a structure view of a detecting device for detecting the position of a blade of a wind generating set according to an embodiment of the present invention.
Description of the reference numerals
101-speed reducer, 102-driving wheel, 103-tensioning wheel, 104-tensioning wheel, 105-wheel hub, 106-toothed belt, 107-blade mounting device, 108-toothed belt fixing block, 109-toothed belt fixing block, 110-tensioning wheel fixing device, 111-5 degree proximity switch, 112-87 degree proximity switch, 113-stop block, 114-variable pitch bearing inner ring, 201-roller device, 202-5 degree metal belt set, 203-87 degree metal belt set, 301-supporting structure, 302-roller, 303-metal belt, 304-metal belt, 305-supporting rod, 306-connecting shaft, 307-bolt, 308-elastic component, 309-insulating material, 401-power module, 402-digital quantity acquisition module, 105-digital quantity acquisition module, 601-encoder, 602-controller, 603-variable pitch limit structure of wind generating set.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
First, as shown in fig. 1, a schematic diagram of a detection system for measuring a blade position by using a proximity switch in the prior art is shown, which includes an encoder (not shown in the figure), a speed reducer 101, a transmission wheel 102, a tension pulley 103, a tension pulley 104, a hub 105, a toothed belt 106, a blade mounting device 107 (specifically, a pitch bearing and a component connected and fixed with the pitch bearing, such as a blade root flange), a toothed belt fixing block 108, a toothed belt fixing block 109, a tension pulley fixing device 110, a 5-degree proximity switch 111, a 87-degree proximity switch 112, a stopper 113, and a pitch bearing inner ring 114;
the encoder is arranged at the tail part of the variable pitch motor, namely on the driving device, and is used for detecting the rotating angle of the blade; the speed reducer 101 is engaged with a pitch motor (not shown in the figure); the driving wheel 102 is mechanically connected with an output shaft of the speed reducer 101; the speed reducer 101 and the tensioning wheel fixing device 110 are both fixedly arranged on the hub 105; the tensioning wheel fixing device 110 is used for installing the tensioning wheel 103 and the tensioning wheel 104; the tensioning wheel 103 and the tensioning wheel 104 are used for tensioning the toothed belt 106 so as to ensure the reliability of transmission; the 5-degree proximity switches 111 and 87-degree proximity switches 112 are installed on the variable-pitch bearing inner ring 114, and the 5-degree proximity switch 111 is installed at the 5-degree position of the blade; the 87-degree proximity switch 112 is mounted at the 87-degree position of the blade; the stopper 113 is mounted on the blade mounting device 107 (the blade mounting device 107 is fixedly connected with the outer ring of the pitch bearing) and rotates along with the blade mounting device 107;
the blade mounting device 107 is a circular mechanical mechanism (a structure between adjacent dotted line circles and solid line circles in the figure) for mounting the blade, and in actual operation, the stopper 113 can also be directly mounted at the root of the blade; the toothed belt 106 is arranged along the side surface of the blade mounting device 107 and is tightly attached to the side surface of the blade mounting device 107 for providing power for transmission; the toothed belt fixing block 108, the toothed belt fixing block 109, and the tension pulley fixing device 110 are used to fix the toothed belt 106 to the blade mounting device 107.
The working principle of the system is as follows: when the pitch needs to be changed (i.e. the pitch angle of the blade is changed), a pitch motor (not shown in the figure) drives the speed reducer 101 to rotate, the speed reducer 101 drives the transmission wheel 102 to rotate, the transmission wheel 102 drives the toothed belt 106 to move when rotating, and the toothed belt 106 drives the blade mounting device 107 to rotate, so that the angle of the blade of the wind turbine generator is changed, and the purpose of adjusting the pitch angle is achieved; when the angle measured by an encoder (not shown in the figure) is near 5 degrees, and the stop 113 rotates to the position of the 5-degree proximity switch 111 and triggers the 5-degree proximity switch 111, the pitch system considers that the position of the blade is correct; when the angle measured by the encoder is near 5 degrees and the 5-degree proximity switch 111 is not triggered, the abnormity is considered to occur, and the variable pitch system triggers the fault and enables the wind turbine generator to be shut down in a feathering mode; similarly, when the angle measured by the encoder is near 87 degrees, and the stop 113 rotates to the position of the 87-degree proximity switch 112 and triggers the 87-degree proximity switch 112, the pitch system considers that the position of the blade is correct; when the angle measured by the encoder is near 87 degrees and the 87-degree proximity switch 112 is not triggered, the abnormity is considered to occur, and the variable pitch system triggers the fault and enables the wind turbine generator to be shut down in a feathering mode.
Such a vane position detection system has the following disadvantages:
1) the detection distance of the proximity switch is generally short, and the distance from the proximity switch to the stop block is increased, or the proximity switch fails, or a circuit of the proximity switch is loosened, so that the wind driven generator triggers to fail and stops;
2) the proximity switch with the fault can be a proximity switch at a 5-degree position, a proximity switch at an 87-degree position and a stopper, so that the three faults are more and more complex in reasons and difficult to solve effectively; if the wind power generation device is not processed, the number of times of false alarm faults of the wind power generator is large, and the power generation capacity is influenced.
In order to solve the above-mentioned defects caused by the way of triggering the proximity switch by the stop, the embodiment of the invention provides a blade position detection way for generating a detection signal by using the contact of the roller device and the metal band group, so that the precision requirement on the distance position during measurement is reduced, and the number of false alarm faults is reduced.
The technical solution of the present application is further illustrated by the following examples.
Example one
As shown in fig. 2, for the utility model provides a wind generating set's the spacing unit schematic diagram of becoming oar a, including blade installation device 107 and the variable oar bearing inner circle 114 among this wind generating set, this wind generating set's the spacing unit of becoming oar includes: the pitch bearing comprises a roller device 201 arranged on a blade mounting device 107, a metal strip group (such as a 5-degree metal strip group 202 shown in fig. 2) comprising two metal strips arranged in an isolated manner and arranged on a pitch bearing inner ring 114, and a signal trigger circuit (not shown in fig. 2), wherein the two metal strips arranged in an isolated manner are connected in series in the signal trigger circuit;
for example, in fig. 2, the 5-degree metal strip group 202 includes two metal strips, and the two metal strips are isolated from each other and insulated from each other, and the two metal strips are connected in series in an external signal trigger circuit. It should be noted that, here, the series connection means that if two metal strips are in a conductive connection state, they are in a series connection relationship in the above-mentioned signal trigger circuit.
The signal trigger circuit in this embodiment has a function of generating a detection signal when the whole signal trigger circuit is turned on, and the whole signal trigger circuit is in a connected state except that two connected metal strips which are separately arranged are in a disconnected state. Therefore, only two metal strips are connected in a conductive manner, the signal trigger circuit can be triggered to generate a detection signal. The structure of the signal trigger circuit is not limited in this embodiment as long as the above functions are satisfied.
When the roller device 201 rotates with the blade mounting device 107 to be aligned with the metal strip group, the roller device 201 contacts two isolated metal strips on the metal strip group, so that the two metal strips are electrically connected, and triggers the signal trigger circuit to generate a detection signal.
Specifically, for example, when the roller device 201 rotates with the blade mounting device 107 to align with the 5-degree metal strip group 202 in the figure, the roller (conductive material) on the roller device 201 contacts two isolated metal strips on the 5-degree metal strip group 202, so that the two metal strips are conductively connected, and the whole signal trigger circuit is turned on to generate a detection signal.
According to the pitch-variable limiting unit of the wind generating set, when the roller device rotates to be aligned with the metal strip group along with the blade mounting device, the roller device is in contact with the two isolated metal strips on the metal strip group, so that the two metal strips are in conductive connection, the trigger signal trigger circuit generates a detection signal, and the detection of the position of the blade is realized. This scheme is different from the mode that adopts proximity switch to detect the blade position, has reduced the detection degree of difficulty when actual operation, has avoided stopping because of the unable wrong report of wind turbine generator system that leads to of output switch signal of the distance between proximity switch and the dog is difficult to control, has realized the accurate detection to the blade position of the oar system that becomes.
The following will specifically describe each structural part in the pitch limiting unit of the wind generating set.
Example two
As shown in fig. 3, a schematic view of a pitch limiting unit of a wind generating set according to an embodiment of the present invention is a schematic view of a pitch limiting unit of a wind generating set, that is, an observation view from the direction of the outer circumferential side of the blade mounting device 107; the structure of the roller device 201, the metal band set and the signal trigger circuit will be specifically described in this embodiment.
First, as shown in fig. 3, the roller device 201 may include:
a support structure 301 arranged on the blade mounting device 107, part of the body of the support structure 301 extending above the inner ring 114 of the pitch bearing, and rollers 302 arranged on the part of the support structure 301 extending above the inner ring 114 of the pitch bearing, wherein the rollers 302 are in conductive contact with two isolated metal strips on a metal strip group (for example, the metal strip group consisting of the metal strip 303 and the metal strip 304 in fig. 3) when the roller device 201 rotates with the blade mounting device 107 to be aligned with the metal strip group.
In practical application scenarios, the supporting structure 301 may also be designed as a "Γ" -shaped integrated structure, and the vertical structure part is fixed on the blade mounting device 107 for raising the position of the roller 302 (for facilitating contact with the metal band set) and for fixing the function of the overall structure of the roller device 201, and the lateral structure of the "Γ" -shaped structure is used for extending to the fixed roller 302 above the pitch bearing inner ring 114.
Further, as shown in fig. 3, the supporting structure 301 may include a supporting rod 305 located on the ring-shaped tangent plane of the blade mounting device 107 and disposed along the vertical direction of the ring-shaped tangent plane, a connecting shaft 306 connected to the upper end of the supporting rod 305 and extending horizontally to above the inner ring 114 of the pitch bearing, and the roller 302 rotatably sleeved on the connecting shaft 306.
Specifically, the original stop block on the blade mounting device 107 in the prior art can be modified into the support bar 305, and the original position of the proximity switch can be replaced by a metal band set, so as to reduce the modification cost.
The support rod 305 is mounted on an annular section of the blade mounting device 107 (the annular section may be located at the end of the blade mounting device 107 where the blade is mounted), and is used for fixing the connecting shaft 306, and at the same time, is used for making the positions of the connecting shaft 306 and the roller 302 higher than the limit switch on the inner ring of the pitch bearing and the rest of mechanical structures on the hub 105 relative to the plane where the blade mounting device 107 is located, so as to avoid mechanical collision or pulling of the roller device 201 and the mechanical structures, and protect the safety of the mechanical structures.
The height of the roller 302 is raised through the supporting structure 301, so that the roller 302 is prevented from affecting a limit switch and other mechanical structures in the rotating process; meanwhile, due to the height of the roller 302, the roller 302 does not contact any structure except the position where the metal strip is arranged on the inner pitch bearing ring 114, and therefore abrasion of the roller 302 is reduced.
Further, as shown in fig. 3, the roller device 201 further includes: at an end portion of the connecting shaft 306 away from the support bar 305, a bolt 307 for preventing the roller 302 from falling off is fixedly attached.
Further, as shown in fig. 3, a frictional texture is provided on the surface of the roller 302. The friction texture serves to increase the friction between the roller 302 and the metal strip, achieving good conductive contact.
The roller 302 may be made of metal, graphite, or a conductive material such as conductive rubber.
Further, as shown in fig. 3, the roller device 201 further includes: an elastic member 308 is provided between the support bar 305 and the connecting shaft 306, and the elastic member 308 is used to form elastic stress between the support bar 305 and the connecting shaft 306 in a mutual approach.
Specifically, the elastic member 308 may be a spring, and is used for drawing the distance between the supporting rod 305 and the connecting shaft 306 by the elastic force of the elastic member 308 when the supporting rod 305 and the connecting shaft 306 are loosened or the roller 302 is worn to a certain extent and cannot be in good contact with the metal band set, so as to ensure that the roller 302 is in close contact with the metal band.
Next, referring to fig. 2 and 3, two metal strips included in the metal strip group, for example, two metal strips in a 5-degree metal strip group, may be separately disposed at the same angular position on the pitch bearing inner ring 114 (i.e., corresponding to 5-degree positions of the pitch blade, respectively), and may further include an insulating material 309, and the two metal strips, such as the metal strip 303 and the metal strip 304, are fixed on the pitch bearing inner ring 114 through the insulating material 309.
Finally, as shown in fig. 4, the structure diagram of the signal trigger circuit provided in this embodiment may include: a power module 401 and a digital quantity acquisition module 402; wherein,
the power module 401 is used to output a voltage signal outwards, and the output terminal ("+" terminal) is connected to one metal strip (e.g., metal strip 303 in fig. 3) of the metal strip group; the digital quantity acquisition module 402 is used for acquiring a voltage signal as a detection signal, and an input end of the digital quantity acquisition module is connected with another metal strip (such as the metal strip 304 in fig. 3) of the metal strip group;
after the two metal strips in the metal strip group are conductively connected through the roller device 201, the signal trigger circuit shown in fig. 4 is turned on, and is triggered to generate a detection signal.
Specifically, the power module 401 may be a power supply capable of outputting a constant voltage of 24V, and when the roller device 201 rotates to a preset angle along with the blade mounting device 107 and contacts with the metal strip set at a preset angle position, a voltage signal output by the power module 401 is transmitted to the digital input channel of the digital acquisition module 402 through the conductive metal strip set, so as to generate a detection signal in the form of a single pulse.
The pitch limiting unit of the wind generating set provided by this embodiment specifically describes the roller device, the metal band group, and the signal trigger circuit on the basis of the structure shown in fig. 2. Each structure after thinning can be convenient, effectual becomes the detection of oar blade position.
Further, on the basis of the above-mentioned embodiment regarding the pitch limiting unit of the wind generating set, as shown in fig. 5, the present embodiment further provides a pitch limiting structure of the wind generating set, which includes the blade mounting device 107 and the pitch bearing inner ring 114, and further includes: the variable pitch limiting units of the two groups of wind generating sets are as described above; wherein,
the blade mounting device 107 is provided with a roller device 201, two preset angles (such as 5 degrees and 87 degrees) of the variable pitch bearing inner ring 114 are correspondingly provided with a metal band group (such as a 5-degree metal band group 202 and a 87-degree metal band group 203 in the figure) respectively comprising two metal bands which are arranged in an isolated manner, and two signal trigger circuits (not marked in the figure), and the roller device 201, any metal band group and the signal trigger circuit where the metal band group is connected in series form a variable pitch limiting unit of the wind generating set.
Wherein angle a is 82 degrees in the figure.
It can be understood that, adopt the mechanism that dog and proximity switch combination produced switching signal to detect the blade position among the prior art, can wholly reform transform into adopting in this scheme that roller device contact metal strip group produces the detected signal and detect the blade position, concrete transformation method can set up roller device in the position that sets up the dog originally, sets up metal strip group in the position that sets up proximity switch originally.
EXAMPLE III
As shown in fig. 6, for the embodiment of the utility model provides a wind generating set's blade position detection device includes: an encoder 601, a controller 602 and a pitch limit structure 603 of a wind park as shown in embodiment two, wherein,
the encoder 601 is arranged on a driving device of the variable pitch motor and used for detecting the rotation angle of the blade;
the variable pitch limiting structure 603 of the wind generating set is used for outputting a detection signal when the blades rotate to a preset angle;
the controller 602 is connected to the encoder 601 and the pitch limiting structure 603 of the wind turbine generator system, and is configured to acquire information of the rotation angle and the detection signal of the blade, and determine the position of the blade according to the acquisition condition of the rotation angle and the detection signal.
Specifically, the controller 602 may determine the position of the blade by performing the process shown below:
firstly, collecting a rotation angle output by an encoder 601;
the rotation angle output by the encoder 601 is the designated angle position to be reached by the blade when the pitch system executes blade pitch variation.
Secondly, collecting a detection signal output by a variable pitch limit structure 603 of the wind generating set;
the detection signal is generated by the trigger signal triggering circuit after the roller device 201 contacts the metal strip group at the preset angle when rotating to the preset angle.
And finally, judging the rotation angle and the acquisition condition of the detection signal to determine the position of the blade.
For example, when the collected rotation angle is a preset angle and the detection signal is synchronously collected, it is determined that the current position of the blade is accurate and the rotation angle is the preset angle.
For example, corresponding to the pitch limiting structure of the wind generating set shown in fig. 5, the detection process of the blade position is as follows:
normally, when the blade rotates from the 90 degree position to the 0 degree direction, the roller device 201 first contacts the 87 degree metal strip set 203, and the signal trigger circuit connected to the 87 degree metal strip set 203 generates a detection signal. Then, the blade continues to rotate, the roller device 201 passes by and contacts the 5-degree metal strip group 202, and the signal trigger circuit connected with the 5-degree metal strip group 202 generates a detection signal.
In the detection process, when the rotation angle value output by the encoder 601 is about 87 degrees and a detection signal is generated by a signal trigger circuit connected with the 87-degree metal strip group 202, the position of the blade is considered to be correct, and the fault shutdown is not triggered; when the rotation angle value output by the encoder 601 is about 5 degrees and a detection signal is generated by a signal trigger circuit connected with the 5-degree metal strip group 202, the position of the blade is considered to be correct, and the fault shutdown is not triggered.
According to the blade position detection device of the wind generating set, the controller acquires the rotation angle output by the encoder and the detection signal output by the variable pitch limiting structure of the wind generating set, and judges the synchronism of the detection signal, so that the actual position of the blade is finally obtained, the detection accuracy is improved, and unnecessary fault shutdown is reduced.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The utility model provides a wind generating set's becomes oar spacing unit, wind generating set includes blade installation device and becomes oar bearing inner race, its characterized in that includes: the device comprises a roller device arranged on the blade mounting device, a metal band group and a signal trigger circuit, wherein the metal band group is arranged on the variable-pitch bearing inner ring and comprises two metal bands which are arranged in an isolated mode;
when the roller device rotates along with the blade mounting device to be aligned with the metal strip group, the roller device contacts two isolated metal strips on the metal strip group, so that the two metal strips are in conductive connection, and the signal trigger circuit is triggered to generate a detection signal.
2. The pitch limiting unit of a wind generating set according to claim 1, wherein the roller device comprises:
the supporting structure is arranged on the blade mounting device, part of the body of the supporting structure extends to the upper part of the variable-pitch bearing inner ring, rollers are arranged on the part of the supporting structure which extends to the upper part of the variable-pitch bearing inner ring, and when the roller device rotates along with the blade mounting device to be aligned with the metal strip group, the rollers are in conductive contact with two isolated metal strips on the metal strip group.
3. The pitch limiting unit of a wind generating set according to claim 2, wherein the support structure comprises:
the supporting rod is positioned on the annular tangent plane of the blade mounting device and arranged in the vertical direction of the annular tangent plane, the connecting shaft is connected with the upper end of the supporting rod and extends to the upper part of the variable-pitch bearing inner ring in the horizontal direction, and the roller is rotatably sleeved on the connecting shaft.
4. A pitch limiting unit of a wind generating set according to claim 3, wherein the roller device further comprises: and the end part of one side of the connecting shaft, which is far away from the supporting rod, is fixedly connected with a bolt for preventing the roller from falling off.
5. The pitch limiting unit of a wind generating set according to claim 3, wherein the surface of the roller is provided with a friction texture.
6. A pitch limiting unit of a wind generating set according to claim 3, wherein the roller device comprises:
the elastic component is arranged between the supporting rod and the connecting shaft and used for forming elastic stress close to each other between the supporting rod and the connecting shaft.
7. The pitch limiting unit of the wind generating set according to claim 1, wherein the two metal strips included in the metal strip group are separately arranged at the same angular position on the inner ring of the pitch bearing, the metal strip group further comprises an insulating material, and the two metal strips are fixed on the inner ring of the pitch bearing through the insulating material.
8. The pitch limiting unit of a wind generating set according to claim 1, wherein the signal triggering circuit comprises: the system comprises a power supply module and a digital quantity acquisition module;
the power supply module is used for outputting a voltage signal outwards, and an output end of the power supply module is connected with one metal strip of the metal strip group; the digital quantity acquisition module is used for acquiring a voltage signal as the detection signal, and the input end of the digital quantity acquisition module is connected with the other metal belt of the metal belt group;
and when the two metal belts in the metal belt group are in conductive connection through the roller device, the signal trigger circuit is triggered and generates the detection signal.
9. The utility model provides a wind generating set's becomes oar limit structure, contains blade installation device and becomes oar bearing inner race, its characterized in that still includes: two groups of pitch limiting units of a wind generating set according to any one of claims 1-8; wherein,
the blade mounting device is provided with a roller device, two preset angles of the variable pitch bearing inner ring are correspondingly provided with a metal band group consisting of two metal bands which are separately arranged, and two signal trigger circuits, and the roller device, any one of the metal band groups and the signal trigger circuit in series connection with the metal band group form a variable pitch limiting unit of the wind generating set.
10. A wind generating set's blade position detection device which characterized in that includes: an encoder, a controller and a pitch limit structure of a wind park according to claim 9, wherein,
the encoder is arranged on a driving device of the variable pitch motor and used for detecting the rotation angle of the blade;
the variable pitch limiting structure of the wind generating set is used for outputting a detection signal when the blades rotate to a preset angle;
the controller is respectively connected with the encoder and the variable pitch limit structure of the wind generating set and used for acquiring the rotation angle of the blade and the information of the detection signal and determining the position of the blade according to the acquisition condition of the rotation angle and the detection signal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110428691A (en) * | 2019-09-17 | 2019-11-08 | 固安华电天仁控制设备有限公司 | A kind of blower variable-pitch teaching simulating device |
| CN113007035A (en) * | 2019-12-20 | 2021-06-22 | 新疆金风科技股份有限公司 | Tooth belt fault detection method, device and equipment of variable pitch system |
-
2017
- 2017-09-15 CN CN201721185484.7U patent/CN207513745U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110428691A (en) * | 2019-09-17 | 2019-11-08 | 固安华电天仁控制设备有限公司 | A kind of blower variable-pitch teaching simulating device |
| CN113007035A (en) * | 2019-12-20 | 2021-06-22 | 新疆金风科技股份有限公司 | Tooth belt fault detection method, device and equipment of variable pitch system |
| CN113007035B (en) * | 2019-12-20 | 2022-07-05 | 新疆金风科技股份有限公司 | Tooth belt fault detection method, device and equipment of variable pitch system |
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