WO2020000996A1 - 叶片开裂状态监测方法、监测系统及叶片 - Google Patents
叶片开裂状态监测方法、监测系统及叶片 Download PDFInfo
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- WO2020000996A1 WO2020000996A1 PCT/CN2019/070082 CN2019070082W WO2020000996A1 WO 2020000996 A1 WO2020000996 A1 WO 2020000996A1 CN 2019070082 W CN2019070082 W CN 2019070082W WO 2020000996 A1 WO2020000996 A1 WO 2020000996A1
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- blade
- air pressure
- pressure value
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- preset
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 77
- 238000005336 cracking Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 72
- 239000011796 hollow space material Substances 0.000 claims abstract description 16
- 230000007704 transition Effects 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000003032 molecular docking Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 abstract 3
- 238000000429 assembly Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000007711 solidification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0016—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of aircraft wings or blades
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Definitions
- the present application relates to the field of wind power technology, and in particular, to a method, a monitoring system, and a blade for monitoring a cracked state of a blade.
- the cost of the blades accounts for about 20% of the whole machine. With the increasing size of the blades, the cost of repairing and replacing offshore blades and foreign blades is high, and the cycle is long. The owners of the venues are large and have security risks.
- Embodiments of the present application provide a method, a monitoring system, and a blade for monitoring the cracking state of a blade, which can monitor the cracking state of the blade and have a low false positive rate.
- the blade includes a plurality of blade components and a connecting body, and the plurality of blade components are connected to each other through the connecting body to form a cavity.
- the monitoring method includes: providing a pressure transmitting component, and pressure.
- the transmission component includes a side wall, a hollow space surrounded by the side wall, and an opening opened on the side wall and communicating with the hollow space; forming a closed cavity, and placing the pressure transmission component at the connection between the blade part and the connecting body in the cavity , And fixed by the connecting body, so that the opening peripheral area of the pressure transmission component and the corresponding blade component are sealed and connected to each other, the pressure transmission component and the blade component together form a closed cavity with a preset air pressure value; to detect the actual air pressure, use a detector The actual air pressure value in the closed cavity is detected; the cracking state is determined, and the cracking state of the blade is determined according to the actual air pressure value and a preset air pressure value.
- a blade cracking condition monitoring system in another aspect of the embodiments of the present application, includes a plurality of blade components and a connecting body. The plurality of blade components are connected to each other through the connecting body to form a cavity.
- the blade cracking condition monitoring system includes: pressure transmission The component includes a side wall, a hollow space surrounded by the side wall, and an opening opened on the side wall and communicating with the hollow space.
- the pressure transmitting component can be placed at the connection between the blade part and the connecting body in the cavity, and the connection The body is fixed so that the opening peripheral area of the pressure transmission component and the corresponding blade component are sealed and connected to each other.
- the pressure transmission component can form a closed cavity with a preset air pressure value together with the blade component; a detector is connected to the pressure transmission component and can It is arranged on the blade part and used to detect the actual air pressure value of the closed cavity; the controller determines the cracking state of the blade according to the actual air pressure value and the preset air pressure value.
- a blade including: a blade component, and a plurality of blade components are connected to each other through a connecting body to form a cavity; in the above-mentioned blade cracking state monitoring system, a pressure transmission component is disposed in the blade in the cavity The connection between the component and the connecting body is fixed by the connecting body so that the opening peripheral area of the pressure transmission component and the corresponding blade component are sealed and connected to each other.
- the pressure transmission component and the blade component form a closed cavity with a preset air pressure value.
- the detector is connected to the pressure transmitting assembly and is disposed on the blade member.
- a method, a monitoring system and a blade for monitoring a cracked state of a blade provided in the embodiments of the present application are used for the blade.
- the blade includes blade components such as a windward shell, a leeward shell, and a web.
- the monitoring method includes providing a pressure transmitting component. Step of forming a closed cavity, by setting the pressure transmitting component at the connection between the blade member and the connecting body in the cavity of the blade, and fixing the connecting body through the connecting body, so that the circumferential measurement area of the opening of the pressure transmitting component and the corresponding
- the blade members are sealedly connected to each other to form a closed cavity with a preset pressure value together with the blade members.
- the pressure in the closed cavity can be detected by a detector.
- the pressure in the closed cavity will change. Therefore, the blade can be determined by the actual air pressure value and the preset air pressure value in the closed cavity.
- the cracking state can not only monitor the cracking state of the blade, but also not be disturbed by external factors, and can effectively reduce the false judgment rate of the monitoring results.
- FIG. 1 is a schematic structural diagram of a blade in the prior art
- FIG. 2 is a cross-sectional view taken along the A-A direction in FIG. 1;
- FIG. 3 is a schematic cross-sectional structure diagram of a pressure transmission component according to an embodiment of the present application.
- FIG. 4 is a schematic structural diagram of a blade according to an embodiment of the present application.
- FIG. 5 is a sectional view taken along the B-B direction in FIG. 4;
- FIG. 6 is an enlarged view at C in FIG. 5; FIG.
- FIG. 7 is a structural block diagram of a blade cracking state monitoring system according to an embodiment of the present application.
- FIG. 8 is a structural block diagram of a controller according to an embodiment of the present application.
- FIG. 9 is a schematic structural diagram of a transition pipe body according to an embodiment of the present application.
- FIG. 1 shows a schematic structural diagram of a blade in the prior art
- FIG. 2 shows a cross-sectional view along the A-A direction in FIG. 1.
- the blade has a blade root portion 1 a and a blade tip portion 1 b in a longitudinal direction of the blade, and the blade as a whole may include a plurality of blade members and a connecting body 100, and the plurality of blade members are connected to each other through the connecting body 100.
- the cavity 110 is connected and formed.
- the blade member may include a windward shell 70 and a leeward shell 80.
- the blade member may further include a web 90.
- the windward shell 70 and the leeward shell 80 are opposite to each other and are docked with each other, so as to form a cavity 110 therebetween, and form opposite leading edges 1c and trailing edges 1d at the docking points.
- the connecting body 100 may be connected between the windward shell 70 and the leeward shell 80, between the windward shell 70 and the web 90, and between the leeward shell 80 and the web 90.
- FIG. 3 shows a schematic structural diagram of a pressure transmission assembly according to an embodiment of the present application
- FIG. 4 shows a structural schematic diagram of a blade according to an embodiment of the present application
- FIG. 5 shows a cross-sectional view along the BB direction in FIG. 4
- FIG. 6 shows The enlarged view at C in FIG. 5 is shown.
- the method for monitoring leaf cracking provided in the embodiments of the present application includes:
- the pressure transmitting component 10 includes a side wall 11, a hollow space 12 surrounded by the side wall 11, and an opening 13 opened on the side wall 11 and communicating with the hollow space 12. .
- the pressure transmitting assembly 10 may be in the form of a tube body having a predetermined length, or may be in the form of a balloon.
- the number of the openings 13 may be one, and one opening 13 penetrates the pressure transmitting component 10 along the extending direction of the pressure transmitting component 10. Of course, the number of the openings 13 may also be two or more, and two or more openings 13 extend the pressure transmitting component 10. The directions are spaced from each other.
- the entire pressure transmitting assembly 10 may extend along the length direction X of the blade, and may specifically extend from the heel portion 1a of the blade to the blade tip portion 1b.
- the pressure transmission component 10 may be an ohmic tube, the material of which may be PVC, and the cross-sectional size may be 6 mm-25 mm.
- the cross-sectional size may specifically refer to the radial size of the cross-section.
- the connecting body 100 may be a structure formed by solidification of an adhesive.
- the pressure transmitting assembly 10 is placed at the connection between the blade member and the connecting body 100 in the cavity 110, and is fixed by the connecting body 100 so that the pressure is transmitted.
- the peripheral area of the opening 13 of the module 10 is sealedly connected to the corresponding blade member.
- the pressure transmission module 10 and the blade member jointly form a closed cavity 14 with a preset air pressure value.
- the windshield housing 70 Pressure transmission is provided on the connecting body 100 between the leeward shell 80, the connecting body 100 between the windward shell 70 and the web 90, and the connecting body 100 between the leeward shell 80 and the web 90
- the assembly 10 also forms a corresponding closed cavity 14.
- the actual air pressure value in the closed cavity 14 is detected by a detector 20.
- the detector 20 may be a pressure sensor, and the actual air pressure value in the closed cavity 14 may be directly detected by the detector 20.
- the detector 20 may also use other types of sensors, as long as it can directly or indirectly detect the actual air pressure value in the closed cavity 14 (or the pressure change is sufficient).
- the detector 20 may be provided at different positions of the blade, may be located in the cavity 110 inside the blade, of course, it may also be provided outside the blade, and may specifically be located inside or outside the root portion 1a of the blade, and when damaged It is easy to open the corresponding protective facilities at the root of the leaf for maintenance or replacement.
- the pressure transmitting assembly 10 and the corresponding blade member are formed with the closed cavity 14 having a preset air pressure value.
- the rear edge 1d where the windward shell 70 and the leeward shell 80 meet is cracked.
- the corresponding pressure transmitting component 10 is fixed by the corresponding connecting body 100, when the blade cracks, the external force acts When the corresponding blade part is separated from the pressure transmitting assembly 10, the sealed cavity 14 leaks, and the internal pressure of the cavity 14 will change accordingly.
- the corresponding closed cavity 14 will not leak, and its pressure will maintain a preset air pressure value. Therefore, according to the actual air pressure value and the preset air pressure value, the cracking state of the blade can be determined.
- the method for monitoring the cracking condition of the blade includes the step of providing the pressure transmission component 10 and the step of forming the closed cavity 14, the blade component and the connecting body 100 are disposed in the cavity 110 of the blade by setting the pressure transmission component 10.
- the connecting portion is fixed by the connecting body 100, so that the peripheral measurement area of the opening 13 of the pressure transmission assembly 10 and the corresponding blade component are sealedly connected to each other, so as to form a closed cavity 14 with a predetermined pressure value with the blade component.
- it includes the step of detecting the actual air pressure.
- the actual air pressure in the closed cavity 14 can be detected by the detector 20 in real time. When the blade cracks, the air pressure in the closed cavity 14 will change.
- the cracking state of the blade can be determined, which can monitor the cracking state of the blade without being disturbed by external factors, and can effectively reduce the false judgment rate of the monitoring results.
- the detection frequency of the actual air pressure value in the enclosed cavity 14 affected by the detector can be adjusted, thereby real-time monitoring of the cracking state of the blade can be achieved.
- the step of determining the cracking state includes: the ratio of the difference between the actual air pressure value and the preset air pressure value to the preset air pressure value is within a first preset threshold range, and the pressure change ratio of the closed cavity within a unit time of 14 exceeds the first
- the second predetermined threshold value range determines that the blade is in a cracked state.
- the ratio of the pressure change per unit time refers to the ratio of the difference between the actual air pressure value currently detected by the detector 20 and the actual air pressure value of the last detection and the actual air pressure value of the last detection. Change ratio.
- the preset pressure value can be any value between 0Mpa and 4Mpa, including the two end values of 0Mpa and 4Mpa.
- the first preset threshold value can be any value between 50% and 80%, including 50%, 80% two end values, optional values between 60% and 70%.
- the second preset threshold range is any value between 1% and 5%, including two end values of 1% and 5%, and optionally any value between 2% and 4%.
- the preset air pressure value as 4Mpa as an example, when the actual air pressure value currently detected by the detector 20 is 1Mpa, and the actual air pressure value of the previous detection in a unit time is 1.1Mpa, the difference between the current actual air pressure value and the preset air pressure value
- the ratio of the value to the preset air pressure value is 75%, which is within the first preset threshold value
- the pressure change ratio of the closed chamber within 14 unit time is 10%, which exceeds the second preset threshold value range.
- the pressure change ratio exceeds the range of the second preset threshold value, it can be determined that the pressure change in the closed cavity 14 is caused by blade cracking.
- the step of determining the cracking state further includes: a ratio of a difference between the actual air pressure value and the preset air pressure value and the preset air pressure value is within a first preset threshold range, and the closed cavity is within 14 unit times If the pressure change ratio is within the second preset threshold value range, it is determined that the blade is in an uncracked state, and a signal is given that the pressure transmission component 10 is in a pressure to be adjusted state.
- the preset air pressure value Take the preset air pressure value as 4Mpa as an example.
- the actual air pressure value currently detected by the detector 20 is 1Mpa and the actual air pressure value of the previous detection in a unit time is 1.02Mpa
- the current actual air pressure value and the preset air pressure value are The ratio of the difference to the preset air pressure value is 75%, which is within the first preset threshold value range, and the pressure change ratio of the closed chamber within 14 unit time is 2%, which is within the second preset threshold value range.
- the monitoring method further includes a pressure adjustment step.
- the pressure adjustment step includes: adjusting the pressure in the closed cavity 14 according to the pressure-to-be-adjusted status signal, so that the actual air pressure value of the closed cavity 14 is equal to a preset air pressure value. In order to better ensure the monitoring of the blade, prevent monitoring failure caused by long-term natural pressure relief.
- the blade crack detection method of the embodiment of the present application limits the range of the preset air pressure value, so that the pressure transmission component 10 and the like will not generate a pressure load on the corresponding blade component of the blade, and can reduce the pressure transmission component 10 and the corresponding blade. Sealed connection requirements between components.
- the correspondingly limited range of the first preset threshold and the second preset threshold limit the blade cracking state, non-cracking state, and the conditions under which the pressure transmission component 10 is in a pressure-adjusted state, which can further reduce the monitoring method. Rate of false positives, and can avoid frequent pressure adjustment in the closed cavity 14.
- FIG. 7 shows a structural block diagram of a blade cracking state monitoring system according to an embodiment of the present application.
- An embodiment of the present application further provides a blade cracking condition monitoring system, which can be used for the blades shown in FIG. 1 and FIG. 2.
- the blade includes a plurality of blade components and a connecting body 100. The multiple blade components are connected to each other through the connecting body 100 and Forming a cavity 110.
- the blade cracking condition monitoring system provided in the embodiment of the present application includes: a pressure transmitting component 10, a detector 20, and a controller 30.
- the pressure transmission component 10 included in the monitoring system can also use the pressure transmission component 10 shown in FIG. 3.
- the pressure transmission component 10 includes a side wall 11, a hollow space 12 surrounded by the side wall 11, and a hollow space 12 opened on the side wall 11. 12 communicating openings 13, the pressure transmitting assembly 10 can be placed at the connection between the blade member in the cavity 110 and the connecting body 100, and fixed by the connecting body 100, so that the peripheral area of the opening 13 of the pressure transmitting assembly 10 and the corresponding The blade parts are sealed and connected to each other.
- the pressure transmission assembly 10 can form a closed cavity 14 with a preset air pressure value together with the blade parts.
- the structure of the pressure transmission assembly 10 in this system, the number of openings 13 and the number of rows of openings 13 are different.
- the layout method and the connection method of the pressure transmission assembly 10 with the blade component and the connecting body 100 are the same as those described in the above-mentioned method for monitoring the cracking state of the blade, and will not be repeated here.
- the detector 20 is connected to the pressure transmitting assembly 10 and can be disposed on the blade member, and is used to detect the actual air pressure value of the closed cavity 14.
- the detector 20 may be a pressure sensor.
- the detector 20 may also adopt other sensor forms, as long as it can directly or indirectly detect airtightness.
- the actual air pressure value in the cavity 14 is sufficient.
- the controller 30 determines the cracking state of the blade according to the actual air pressure value and the preset air pressure value.
- FIG. 8 shows a structural block diagram of the controller 30 according to an embodiment of the present application. Please refer to FIG. 8 together.
- the controller 30 includes a signal receiving module 31 and a comparison module 32.
- the signal receiving module 31 is configured to receive an actual air pressure value detected by the detector 20.
- the comparison module 32 is configured to compare the actual air pressure value with a preset air pressure value
- the determination module 33 is configured to determine a ratio of the difference between the actual air pressure value and the preset air pressure value and the preset air pressure value according to the comparison result.
- the pressure change ratio of the closed cavity 14 within a unit time exceeds the second preset threshold value range, it is determined that the blade is in a cracked state.
- the determining module 33 is further configured to determine, according to a comparison result, that a ratio of a difference between the actual air pressure value and the preset air pressure value to the preset air pressure value is within a first preset threshold range, And the pressure change ratio of the closed cavity 14 within a unit time is within the second preset threshold value range, it is determined that the blade is in an uncracked state, and a signal is provided that the pressure transmission component 10 is in a pressure to be adjusted state.
- a signal indicating that the pressure transmission component 10 is in a pressure-to-be-adjusted state is consistent with the implementation manner in the method for monitoring blade cracking in the foregoing embodiments, and details are not described herein.
- the blade cracking condition monitoring system further includes a gas generator 40.
- the gas generator 40 is connected to the pressure transmission assembly 10 and is used to adjust the actual air pressure in the closed cavity 14. value.
- the gas generator 40 includes a pressure pump 41 and a relay 43.
- the pressure pump 41 is connected to the pressure transmission assembly 10 and connected to the controller 30 through the relay 43.
- the controller 30 further includes an execution module 34 and a controller 30.
- the execution module 34 is configured to control the relay 43 to turn on the pressure pump 41 according to the pressure to be adjusted state signal, so as to adjust the actual air pressure value to be equal to the preset air pressure value.
- the blade crack monitoring system further includes a power source 60, and the detector 20, the controller 30, and the relay 43 are all connected to the power source 60 to obtain electrical energy.
- the power source 60 may adopt an anti-surge design, which can effectively prevent lightning damage.
- the controller 30 may be the cavity 110 provided inside the blade or the outside of the blade.
- the controller 30 may also be integrated in the overall controller of the wind power generator set to which the blade is applied.
- the gas generator 40 adopts the above-mentioned structure, that is, it can meet the pressure adjustment in the closed cavity 14 and at the same time, it can be easily installed on the blade. It can be installed on the internal cavity 110 of the blade or on the outer surface of the blade.
- the pressure pump 41 may determine whether to inflate the inside of the closed cavity 14 or to inhale outside the sealed cavity according to a preset pressure value in the closed cavity 14. When the preset pressure value is greater than the external air pressure, inflation is performed into the closed cavity 14. When the preset pressure value is lower than the external air pressure, such as vacuum pressure, the air is sucked out of the closed cavity 14 so that the actual air pressure value is equal to the preset air pressure value.
- the gas generator 40 further includes a check valve 42, and the pressure pump 41 is connected to the pressure transmission assembly 10 through the check valve 42.
- the one-way valve 42 is restricted to be unidirectionally guided by the pressure pump 41 to the pressure transmission assembly 10, and when the preset pressure value is less than the external air pressure, such as The vacuum pressure limits the one-way valve 42 to be unidirectionally guided from the pressure transmission assembly 10 to the pressure pump 41.
- the gas generator 40 further includes an embodiment of the one-way valve 42 on the basis of adopting the above structure, which can prevent gas from leaking out of the pressure transmission assembly 10 from the one-way valve 42 in the reverse direction or from the one-way valve 42 into the pressure transmission assembly 10 in the reverse direction.
- the pressure transmission assembly 10 may be connected to the detector 20 and the gas generator 40 through a transition connection section 50.
- the transition connection section 50 includes a joint 51 having a plurality of interfaces and a transition pipe body 52. The number of interfaces can be three.
- the transition pipe body 52 is connected to one of the interfaces.
- the pressure transmission assembly 10 is connected to the transition pipe body 52.
- the transition pipe body 52 and the joint 51 are connected to the check valve 42 and then to the pressure pump 41. Interconnected.
- the detector 20 and the gas generator 40 are connected to one of the interfaces, respectively.
- the detector 20 is connected to the pressure transmission component 10 through the joint 51 and the transition pipe body 52, and then the actual air pressure value in the pressure transmission component 10 is detected.
- FIG. 9 shows a schematic structural diagram of a transition pipe body according to an embodiment of the present application.
- the transition pipe body 52 has successively distributed first connections along its own extension direction.
- the pipe wall of the first connection section 521 is provided with a notch 521a that is in contact with the pressure transmission component 10 along the extension direction.
- the second connection section 522 has a closed pipe wall.
- the first connecting section 521 of the transition pipe body 52 having a notch 521a is connected to the pressure transmission assembly 10, and the notch 521a is opposite to the opening 13 of the pressure transmission assembly 10, and the peripheral measurement area of the notch 521a is also connected to the pressure transmission assembly 10.
- the blade parts are sealed and connected, and the second connecting section 522 is connected to one of the joints 51, thereby further ensuring the reliability of the connection between the pressure transmission assembly 10 and structural parts such as the joint 51.
- seals such as gaskets and tapes can be used to ensure a good seal at the joints between components, and tests can be performed. Sealability can be tested by using soap bubbles or liquid bubble tests.
- the blade cracking condition monitoring system includes the pressure transmitting component 10, the detector 20, and the controller 30, and the pressure transmitting component 10 is disposed in the blade component and the connecting body in the cavity 110 of the blade.
- 100 is connected to the connecting body 100 and fixed by the connecting body 100, so that the peripheral measurement area of the opening 13 of the pressure transmitting assembly 10 and the corresponding blade member are sealedly connected to each other, so as to form a closed cavity 14 with a predetermined pressure value together with the blade member.
- the detector 20 can monitor the pressure in the closed cavity 14 in real time. When the blade cracks, the air pressure in the closed cavity 14 changes. Therefore, the cracking status of the blade can be determined by the actual air pressure value and the preset air pressure value in the closed cavity 14. It can realize the monitoring of the cracking state of the blade without being disturbed by external factors, and can effectively reduce the false judgment rate of the monitoring results.
- the correspondingly provided gas generator 40 can realize the adjustment of the actual air pressure value in the closed cavity 14 and avoid the failure of the monitoring system caused by the long-term natural pressure relief of the closed cavity 14.
- An embodiment of the present application further provides a blade, which includes a plurality of blade components and the blade cracking state monitoring system of the foregoing embodiments.
- the plurality of blade components are connected to each other through the connecting body 100 to form an empty space.
- the cavity 110 includes a plurality of blade members including a windward shell 70, a leeward shell 80 and a web 90.
- the connecting body 100 is connected between the windward shell 70 and the leeward shell 80, between the windward shell 70 and the web 90, and between the leeward shell 80 and the web 90
- the connecting body 100 is connected between the windward shell 70 and the leeward shell 80, between the windward shell 70 and the web 90, and between the leeward shell 80 and the web 90 At least one of them is also allowed.
- the pressure transmitting assembly 10 is disposed at the connection between the blade member and the connecting body 100 in the cavity 110 and is fixed by the connecting body 100 so that the area around the opening 13 of the pressure transmitting assembly 10 and the corresponding blade member are sealed and connected to each other.
- the transmission assembly 10 and the blade member together form a closed cavity 14 having a preset air pressure value.
- the detector 20 is connected to the pressure transmitting component 10 and is disposed on the blade component.
- the detector 20 may be disposed inside the cavity 110 of the blade.
- the detector 20 may be disposed outside the blade.
- being located at the root portion 1a of the blade makes the detector 20 easier to replace when damaged.
- it can also be located at the blade tip portion 1b of the blade.
- the pressure transmission component 10 included in the blade provided in the embodiment of the present application can also use the pressure transmission component 10 shown in FIG. 3.
- the method and the connection method of the pressure transmission assembly 10 with the blade component and the connecting body 100 are consistent with the introduction in the above-mentioned method for monitoring the cracking state of the blade, and will not be repeated here.
- the detector 20 may be a pressure sensor. As described in the above monitoring method, in some other embodiments, the detector 20 may also adopt other sensor forms, as long as it can directly or indirectly detect the closed cavity. The actual air pressure value within 14 is sufficient.
- the blade provided in the embodiment of the present application includes a plurality of blade components, a connecting body 100 connected to the plurality of blade components to form a cavity 110, and the above-mentioned blade cracking state monitoring system.
- the pressure transmission assembly 10 is disposed at The connection between the blade member in the cavity 110 and the connection body 100 is fixed by the connection body 100 so that the area around the opening 13 of the pressure transmission assembly 10 is sealedly connected to the corresponding blade member, and the pressure transmission assembly 10 and the blade member are connected to each other.
- the closed cavity 14 having a preset air pressure value is formed together, and the pressure in the closed cavity 14 can be detected by the detector 20 in real time. When the blade itself cracks, the air pressure in the closed cavity 14 will change.
- the actual air pressure value and the preset air pressure value in the closed cavity 14 can determine the blade's own cracking status, which can realize the monitoring of the blade's own cracking status. It is not affected by external factors, which can effectively reduce the false judgment rate of monitoring results.
- the same closed cavity 14 only needs a detector 20 (such as a pressure sensor) to measure the signals separated by the blade along its length direction X, so that the number of wiring is small, the installation workload is small, and the risk of lightning protection is low.
- the installation position of the detector 20 is not limited, and the wiring length can be made as short as possible.
- the monitoring system provided is simple in structure and low in cost, can reduce the overall cost of the blade, and has better reliability.
- vulnerable electrical components such as the detector 20 can be provided at the root portion 1a of the blade, replacement and maintenance are more convenient when damaged.
- the data can be measured and analyzed directly, no big data or other additional software is needed to measure, so the accuracy is high, and it is easy to popularize and use.
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Abstract
Description
Claims (15)
- 一种叶片开裂状态监测方法,所述叶片包括多个叶片部件和连接体(100),多个所述叶片部件通过所述连接体(100)相互连接并形成空腔(110),其中,所述监测方法包括:提供压力传递组件(10),所述压力传递组件(10)包括侧壁(11)、由所述侧壁(11)围合形成的中空空间(12)和开设于所述侧壁(11)并与所述中空空间(12)连通的开口(13);形成密闭腔(14),将所述压力传递组件(10)置于所述空腔(110)内的所述叶片部件与所述连接体(100)的连接处,并通过所述连接体(100)固定,以使所述压力传递组件(10)的所述开口(13)周侧区域与对应的所述叶片部件相互密封连接,所述压力传递组件(10)与所述叶片部件共同形成具有预设气压值的所述密闭腔(14);检测实际气压,利用检测器(20)检测所述密闭腔(14)内的实际气压值;确定开裂状态,根据所述实际气压值及所述预设气压值,确定所述叶片开裂状态。
- 根据权利要求1所述的叶片开裂状态监测方法,其中,所述确定开裂状态步骤还包括:所述实际气压值及所述预设气压值的差值与所述预设气压值的比值在第一预设阈值范围内,且所述密闭腔(14)单位时间内压力变化比值超出第二预设阙值范围,则确定所述叶片处于开裂状态。
- 根据权利要求1所述的叶片开裂状态监测方法,其中,所述确定开裂状态步骤还包括:所述实际气压值及所述预设气压值的差值与所述预设气压值的比值在第一预设阈值范围内,且所述密闭腔(14)单位时间内压力变化比值在第二预设阙值范围内,则确定所述叶片处于未开裂状态,并给出所述压力传递组件(10)处于压力待调节状态信号。
- 根据权利要求3所述的叶片开裂状态监测方法,其中,进一步包 括调压步骤,所述调压步骤包括:根据所述压力待调节状态信号,调节所述密闭腔(14)内的压力,以使所述密闭腔(14)的所述实际气压值与所述预设气压值相等。
- 根据权利要求2至4任意一项所述的叶片开裂状态监测方法,其中,所述预设气压值为0Mpa~4Mpa,所述第一预设阙值范围为50%~80%,所述第二预设阙值范围为1%~5%。
- 一种叶片开裂状态监测系统,所述叶片包括多个叶片部件和连接体(100),多个所述叶片部件通过所述连接体(100)相互连接并形成空腔(110),其中,所述叶片开裂状态监测系统包括:压力传递组件(10),包括侧壁(11)、由所述侧壁(11)围合形成的中空空间(12)和开设于所述侧壁(11)并与所述中空空间(12)连通的开口(13),所述压力传递组件(10)能够置于所述空腔(110)内的所述叶片部件与所述连接体(100)的连接处,并通过所述连接体(100)固定,以使所述压力传递组件(10)的所述开口(13)周侧区域与对应的所述叶片部件相互密封连接,所述压力传递组件(10)能够与所述叶片部件共同形成具有预设气压值的密闭腔(14);检测器(20),与所述压力传递组件(10)连接并能够设置于所述叶片部件上,用于检测所述密闭腔(14)的实际气压值;控制器(30),根据所述实际气压值及所述预设气压值,确定所述叶片开裂状态。
- 根据权利要求6所述的叶片开裂状态监测系统,其中,所述压力传递组件(10)为具有预定长度的管体或者气囊;所述开口(13)的数量为一个且沿所述压力传递组件(10)的延伸方向贯穿所述压力传递组件(10);或者,所述开口(13)的数量为两个以上,两个以上所述开口(13)沿所述压力传递组件(10)的延伸方向相互间隔设置。
- 根据权利要求6或7所述的叶片开裂状态监测系统,其中,所述控制器(30)包括:信号接收模块(31),接收所述检测器(20)检测的所述实际气压 值;比较模块(32),比较所述实际气压值与所述预设气压值;判断模块(33),根据比较结果判断所述实际气压值及所述预设气压值的差值与所述预设气压值的比值在第一预设阈值范围内,且所述密闭腔(14)单位时间内压力变化比值超出第二预设阙值范围,则确定所述叶片处于开裂状态。
- 根据权利要求8所述的叶片开裂状态监测系统,其中,所述判断模块(33)还包括根据所述比较结果判断所述实际气压值及所述预设气压值的差值与所述预设气压值的比值在所述第一预设阈值范围内,且所述密闭腔(14)单位时间内压力变化比值在所述第二预设阙值范围内,则确定所述叶片处于未开裂状态,并给出所述压力传递组件(10)处于压力待调节状态信号。
- 根据权利要求9所述的叶片开裂状态监测系统,其中,进一步包括气体发生器(40),所述气体发生器(40)与所述压力传递组件(10)连接并用于调节所述密闭腔(14)内的所述实际气压值。
- 根据权利要求10所述的叶片开裂状态监测系统,其中,所述控制器(30)还包括执行模块(34),所述气体发生器(40)包括压力泵(41)、单向阀(42)以及继电器(43),所述压力泵(41)通过所述单向阀(42)与所述压力传递组件(10)连接并通过所述继电器(43)与所述控制器(30)连接,所述控制器(30)的所述执行模块(34)根据所述压力待调节状态信号控制所述继电器(43)开启所述压力泵(41),以调节所述实际气压值与所述预设气压值相等。
- 根据权利要求11所述的叶片开裂状态监测系统,其中,所述压力传递组件(10)通过过渡连接段(50)与所述检测器(20)及所述气体发生器(40)连接,所述过渡连接段(50)包括具有多个接口的接头(51)以及连接于其中一个所述接口的过渡管体(52),所述压力传递组件(10)连接于所述过渡管体(52),所述检测器(20)及所述气体发生器(40)分别与其中一个所述接口连接。
- 根据权利要求12所述的叶片开裂状态监测系统,其中,所述过渡管体(52)沿其自身的延伸方向具有相继分布的第一连接段(521)以及第二连接段(522),所述第一连接段(521)的管壁沿所述延伸方向设置有与所述压力传递组件(10)对接的缺口(521a),所述第二连接段(522)具有闭合的管壁。
- 一种叶片,其中,包括:叶片部件,多个所述叶片部件通过连接体(100)相互连接并形成空腔(110);如权利要求6至13任意一项所述的叶片开裂状态监测系统,所述压力传递组件(10)设置于所述空腔(110)内的所述叶片部件与所述连接体(100)的连接处,并通过所述连接体(100)固定,以使所述压力传递组件(10)的所述开口(13)周侧区域与对应的所述叶片部件相互密封连接,所述压力传递组件(10)与所述叶片部件共同形成具有预设气压值的密闭腔(14),所述检测器(20)与所述压力传递组件(10)连接并设置于所述叶片部件上。
- 根据权利要求14所述的叶片,其中,多个所述叶片部件包括迎风面壳体(70)、背风面壳体(80)及腹板(90),所述连接体(100)连接于所述迎风面壳体(70)与所述背风面壳体(80)之间、所述迎风面壳体(70)与所述腹板(90)之间及所述背风面壳体(80)与所述腹板(90)之间的至少一者。
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CN109854460A (zh) * | 2019-03-28 | 2019-06-07 | 米建军 | 风机叶片检测方法及装置 |
CN111307439B (zh) * | 2020-03-12 | 2022-07-05 | 三一重能股份有限公司 | 风力发电机叶片缺陷检测方法、装置、设备及存储介质 |
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