CN213337165U - Testing device for local component of wind power blade - Google Patents
Testing device for local component of wind power blade Download PDFInfo
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- CN213337165U CN213337165U CN202022020261.3U CN202022020261U CN213337165U CN 213337165 U CN213337165 U CN 213337165U CN 202022020261 U CN202022020261 U CN 202022020261U CN 213337165 U CN213337165 U CN 213337165U
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Abstract
The utility model discloses a testing device for local components of wind power blades, which comprises a vertical steel frame, wherein the vertical steel frame is connected with a base flange through a connecting bolt, and the base flange and the vertical steel frame are connected to form a base structure of the testing device; the vertical steel frame is fixed on the base through bolts or a welding mode, the vertical steel frame is connected with the base in a reinforcing mode through front and rear inclined supports, one end of the base is connected with a steel wire rope tightening device, and a pulley mechanism is arranged on the base between the steel wire rope tightening device and the vertical steel frame. The test platform is specially used for testing local components of the wind power blade, an L-shaped steel plate is arranged outside the side of the blade root of the component and connected with the test platform through a flange, and the test platform has test universality. The testing device has obvious significance in design evaluation, residual life of the wind field blade, defect expansion, repair performance evaluation and other research works.
Description
Technical Field
The utility model relates to a wind-powered electricity generation blade tests technical field, especially relates to a testing arrangement of local component of wind-powered electricity generation blade.
Background
The composite material wind power blade is a key component of a wind generating set. The design of the wind power blade needs to be evaluated through effective detection means. The blade local component test is a means for evaluating the local safety performance of the blade, and the method mainly comprises the steps of fitting the blade load into a local load, and loading the local load on a corresponding local structure of the blade so as to effectively evaluate the performance of the blade local component. In addition, for the blades of the wind field which operate for a long time, the blades contain a certain number of defects, corresponding static force or fatigue test is carried out by collecting local component samples, and the research work of residual service life, defect expansion, repair performance evaluation and the like of the blades of the wind field is facilitated.
At present, a testing method and research work for a local component of a composite material wind power blade are not developed domestically, so that a testing device and a testing method for the local component of the wind power blade are urgently needed to be developed to meet the use requirements of users.
SUMMERY OF THE UTILITY MODEL
In order to meet the use requirements of users, the application aims to provide a testing device for local components of a wind power blade.
In order to realize the purpose of the utility model, the utility model provides a testing device for local components of wind power blades, which comprises a vertical steel frame, wherein the vertical steel frame is connected with a base flange through a connecting bolt, and the base flange is connected with the vertical steel frame to form a base structure of the testing device;
the vertical steel frame is fixed on the base through bolts or a welding mode, the vertical steel frame is connected with the base in a reinforcing mode through front and rear inclined supports, one end of the base is connected with a steel wire rope tightening device, a pulley mechanism is arranged on the base between the steel wire rope tightening device and the vertical steel frame, the local blade component is provided with a conformal fixture at a load applying position, one end of a steel wire rope is connected with the conformal fixture, the other end of the steel wire rope passes through the pulley mechanism and then is connected with the steel wire rope tightening device, and the steel wire rope tightening device is in communication connection with the monitoring end.
Furthermore, the device also comprises an adapter flange, and the adapter flange is connected with the base flange.
Furthermore, the vertical steel frame, the front and rear inclined supports and the base are all made of I-steel.
Furthermore, the blade local component is connected with an L-shaped steel plate, and the L-shaped steel plate is connected with the adapter flange through a fixing bolt.
Further, when the L-shaped steel plate and the adapter flange are installed in a hole, it should be ensured that the theoretical full blade is horizontally placed, and the height difference between the front edge and the rear edge of a designated tangent plane of the blade structural member is integrally consistent with the height difference between the front edge and the rear edge of the theoretical 0-degree chord line of the blade, which can be expressed as follows:
(H benchmark-H (leading edge 0 degree section)) - (H benchmark-H (leading edge structural member designated section)) ═ theoretical fixed value
(H datum-H (trailing edge 0 degree section)) - (H datum-H (trailing edge structure designation section)) — theoretical fixed value.
Furthermore, one side of the L-shaped steel plate is provided with an oblique angle, and the other side of the L-shaped steel plate is perforated, wherein the angle of the oblique angle is 3-15 degrees, and the length of the steel plate on the oblique angle side is 300-600 mm; the hole diameter of the punched side is 20 mm-40 mm; the length of the steel plate is 80-200 mm, and the thickness of the L-shaped steel plate is 25-40 mm.
Further, the bending angle of each L-shaped structural steel plate should ensure that the connection plane of the blade root end and the flange is parallel to the plane of the blade root of the theoretical blade.
Compared with the prior art, the beneficial effects of the utility model are that, the utility model relates to a testing arrangement of local component of blade is used for wind-powered electricity generation blade local component test to use specially, and component blade root side externally mounted "L" shaped steel board possesses the commonality of test with test bench flange joint. In the experimental device, the tested local blade component cannot be met by other testing equipment for the composite material component in the market in size. The testing device has obvious significance in design evaluation, residual life of the wind field blade, defect expansion, repair performance evaluation and other research works.
Drawings
FIG. 1 is a schematic view of a testing device for a wind turbine blade component.
Fig. 2 is a schematic view of a connection structure of a vertical steel frame and a base flange.
FIG. 3 is a schematic view of a connection structure of a wind turbine blade local component and a testing device of the wind turbine blade local component.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 3 is a schematic view of a connection structure of a wind turbine blade local component and a testing device of the wind turbine blade local component. FIG. 2 is a schematic view of a testing device for a wind turbine blade partial component. Specifically, the testing device comprises a vertical steel frame 201, the vertical steel frame 201 is connected with a base flange 204 through a connecting bolt 202, and the base flange 204 and the vertical steel frame 201 are connected to form a base structure of the testing device. The base flange 204 and the vertical steel frame 201 are not generally disassembled. In the base flange 204, a series of mounting holes are arranged for the base flange to be connected with the adapter flange.
The vertical steel frame 201 is fixed on the base 205 through bolts or welding mode, and the reinforced connection of the vertical steel frame 201 and the base 205 is realized through the front and rear inclined supports 203, so that the stability of the testing device in experimental load is ensured. The vertical steel frame 201 mainly bears bending load, and the vertical steel frame 201, the front and rear inclined supports 203 and the base 205 are preferably made of I-steel.
One end of the base 205 is connected with a wire rope tightening device 110, and a pulley mechanism 109 is arranged on the base 205 between the wire rope tightening device 110 and the vertical steel frame 201.
FIG. 1 is a schematic view of a connection structure of a wind turbine blade local component and a testing device of the wind turbine blade local component.
The blade segment 101 is reinforced in a stepwise manner by an L-shaped steel plate 102 at the outer portion of the root end and by glass fiber reinforced plastics 103 at the outer portion of the blade 101.
The adapter flange 105 is connected to the base flange 204. When different blade partial component test pieces are replaced, different adapter flanges 105 are used for bolting with the base flange 204.
The blade sub-assembly 101, to which the "L" -shaped structural steel plate 102 is mounted, is connected to the adapter flange 105 by means of fixing bolts 104. When the L-shaped steel plate 102 and the adapter flange 105 are installed in a hole, it should be ensured that the height difference between the front edge and the rear edge of a designated tangent plane of the blade structural member is kept consistent with the height difference between the front edge and the rear edge of a theoretical 0-degree chord line of the blade as a whole when the theoretical whole blade is horizontally placed, and the height difference can be expressed as follows:
(Hdatum-H(front edge 0 degree section))-(HDatum-H(front edge structural member designation section)) Theoretical definite value
(HDatum-H(trailing edge 0 degree section))-(HDatum-H(trailing edge structural member designation section)) Theoretical definite value
The blade local component 101 is provided with a free-form clamp 108 at a load applying position, one end of a steel wire rope is connected with the free-form clamp 108, the other end of the steel wire rope passes through a pulley mechanism 109 and then is connected with a steel wire rope tightening device 110, and the steel wire rope tightening device 110 transmits tension data to a monitoring end and transmits the data in a wired or wireless mode.
The wind power blade local component for testing is suitable for a complete component for cutting the wind power blade in the chord direction, and component-level static force and fatigue test are performed. Wherein, the length of the wind power blade local component used for testing is 5 m-15 m;
furthermore, the local component of the wind power blade is a section of complete structure without quality defects selected on the blade, and after cutting, the tangent plane of the component needs to be ensured to be parallel to the root end plane of the blade root of the blade.
It should be noted that the vertical steel frame and the base flange are fixedly connected, and bolted connection or welding or combination of the two connection modes can be adopted; the vertical steel frame can be installed on the base in a bolt connection mode or a welding mode or a combination of the two connection modes. The base is directly placed on the ground after being leveled on the ground.
It should be noted that the testing device is a detachable structure, and the blade partial component is only suitable for the part to be stressed downwards in the static testing process. If mechanical tests on the blade structure parts in other directions are carried out, the angles of the adapter flanges need to be adjusted, and the blade structure parts in other directions are ensured to be downward when being detected; in the fatigue test, the load needs to be measured and calculated, and the stability of the test bed in the experimental process is ensured by balancing the weight at the tip of the base when necessary.
The method and the steps for connecting the local component of the wind power blade with the testing device are as follows:
and SS1, installing a plurality of L-shaped steel plates on the outer surface of the blade at the root end of the blade partial component. The outer surfaces of the L-shaped steel plate and the blade are reinforced to ensure that the L-shaped structural steel plate is tightly connected with local components of the blade, wherein a through hole is processed at one side of the L-shaped steel plate and is used for being connected with a flange hole of a testing device by a bolt;
SS2, glass fiber reinforced plastics are filled between the L-shaped steel plates, and the outer surfaces of the L-shaped steel plates and the blades are reinforced and reinforced in a stepped mode by adopting the glass fiber reinforced plastics, so that the L-shaped steel plates and the blades are effectively and tightly connected. When the blade is installed, the end surfaces of all the L-shaped steel plates are ensured to form a plane parallel to the end surface of the blade root;
SS3, connecting the local blade component with the L-shaped steel plate with a test device adapter flange through bolts;
in step SS1, the "L" shaped steel plate is: one side of the L-shaped steel plate is provided with a bevel angle, and the other side is perforated. Wherein the angle of the bevel is preferably 3-15 degrees, and the length of the bevel side steel plate is 300-600 mm; the hole diameter of the punched side is 20 mm-40 mm; the length of the steel plate is 80 mm-200 mm. The thickness of the L-shaped steel plate is 25-40 mm. The L-shaped steel plates are bent by metal, and the bending angle of each L-shaped steel plate ensures that the connection plane of the blade root end and the flange is parallel to the plane of the blade root of the theoretical blade.
Based on above-mentioned testing arrangement and blade local component and testing arrangement's connected step and mode, the utility model also provides a wind-powered electricity generation blade local component's test method mainly includes following step:
s1, installing an L-shaped steel plate on the blade root side of a local component of a blade, and connecting the L-shaped steel plate to a transfer flange after reinforcing the L-shaped steel plate by using glass fiber reinforced plastics;
and S2, determining the installation angle of the adapter flange and the base flange according to the application direction of the load. When the L-shaped steel plate of the blade structural member and the adapter flange are installed in a hole, it should be ensured that the height difference between the front edge and the rear edge of a designated tangent plane of the blade partial member is integrally consistent with the height difference between the front edge and the rear edge of a theoretical 0-degree chord line of the blade when the theoretical whole blade is horizontally placed, and the height difference can be expressed as follows:
(Hdatum-H(front edge 0 degree section))-(HDatum-H(front edge structural member designation section)) Theoretical definite value
(HDatum-H(trailing edge 0 degree section))-(HDatum-H(trailing edge structural member designation section)) Theoretical definite value
And S3, loading the load in a converted blade coordinate system, and performing load fitting treatment to ensure that the deviation is within a design acceptance range from the load point to the blade root direction by 1-2 m to the load point of the blade root side flange to the blade tip direction (except for the reinforcing interval of the blade root L-shaped steel plate).
S4, during static force experiments, the conformal fixture is installed at the position where the local component of the blade applies load, the force application direction points to the ground, and then the force direction is changed to an observable safety direction through the pulley.
S5, when a fatigue experiment is carried out, the load needs to be measured and calculated, if necessary, the balance weight is arranged at the tip end of the base, the stability of the test bed is ensured in the experiment process, a conformal clamp is arranged at the position of the local component of the blade, which applies the load, and the mode of applying the reciprocating force comprises but is not limited to: 1. a reciprocating mechanical mechanism is arranged at a fixed position on the ground to connect the reciprocating machinery with the clamp through a steel wire rope; 2, a rotating heavy hammer is arranged on the compliance fixture to provide alternating stress for fatigue test of the blade structure part.
The technical means not described in detail in the present application are known techniques.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The testing device for the local component of the wind power blade is characterized by comprising a vertical steel frame (201), wherein the vertical steel frame (201) is connected with a base flange (204) through a connecting bolt (202), and the base flange (204) is connected with the vertical steel frame (201) to form a base structure of the testing device;
the vertical steel frame (201) is fixed to a base (205) through bolts or a welding mode, the vertical steel frame (201) is connected with the base (205) in an enhanced mode through front and rear inclined supports (203), one end of the base (205) is connected with a steel wire rope tightening device (110), a pulley mechanism (109) is arranged on the base (205) between the steel wire rope tightening device (110) and the vertical steel frame (201), the blade local component (101) is provided with a conformal fixture (108) at a load applying position, one end of a steel wire rope is connected with the conformal fixture (108), the other end of the steel wire rope passes through the pulley mechanism (109) and then is connected with the steel wire rope tightening device (110), and the steel wire rope tightening device (110) is in communication connection with a monitoring end.
2. The testing device for the partial component of the wind turbine blade is characterized by further comprising an adapter flange (105), wherein the adapter flange (105) is connected with the base flange (204).
3. The testing device for the local component of the wind power blade is characterized in that the vertical steel frame (201), the front and rear inclined supports (203) and the base (205) are all made of I-shaped steel.
4. The testing device for the wind turbine blade partial component according to claim 1, wherein the blade partial component (101) is connected with an L-shaped steel plate (102), and the L-shaped steel plate (102) is connected with an adapter flange (105) through a fixing bolt (104).
5. The testing device for the local component of the wind turbine blade as claimed in claim 1, wherein when the L-shaped steel plate (102) and the adapter flange (105) are installed in a hole, it should be ensured that the height difference between the front edge and the rear edge of a specified tangent plane of the blade structural component is kept consistent with the height difference between the front edge and the rear edge of a theoretical 0-degree chord line of the blade when the theoretical whole blade is horizontally placed, which can be expressed as follows:
(H benchmark-H (leading edge 0 degree section)) - (H benchmark-H (leading edge structural member designated section)) ═ theoretical fixed value
(H datum-H (trailing edge 0 degree section)) - (H datum-H (trailing edge structure designation section)) — theoretical fixed value.
6. The testing device for the local component of the wind power blade is characterized in that one side of the L-shaped steel plate is provided with an oblique angle, and the other side of the L-shaped steel plate is perforated, wherein the angle of the oblique angle is 3-15 degrees, and the length of the steel plate on the oblique angle side is 300-600 mm; the hole diameter of the punched side is 20 mm-40 mm; the length of the steel plate is 80-200 mm, and the thickness of the L-shaped steel plate is 25-40 mm.
7. The testing device for the local component of the wind turbine blade as claimed in claim 6, wherein the bending angle of each L-shaped structural steel plate is such that the connection plane of the blade root end and the flange is parallel to the plane of the blade root of the theoretical blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022020261.3U CN213337165U (en) | 2020-09-16 | 2020-09-16 | Testing device for local component of wind power blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022020261.3U CN213337165U (en) | 2020-09-16 | 2020-09-16 | Testing device for local component of wind power blade |
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| Publication Number | Publication Date |
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| CN213337165U true CN213337165U (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022020261.3U Active CN213337165U (en) | 2020-09-16 | 2020-09-16 | Testing device for local component of wind power blade |
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| CN (1) | CN213337165U (en) |
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