Fan blade test bench and loading device track capable of improving positioning precision

Abstract

The utility model discloses a fan blade test bench and a loading device track capable of improving positioning accuracy, and belongs to the technical field of fan blade performance test equipment, the fan blade test bench comprises a pouring groove and a track arranged in the pouring groove, in the extension direction of the pouring groove, two side walls of the pouring groove are respectively provided with a first limiting piece, and a second limiting piece is arranged on the track. A second limiting piece corresponding to the first limiting piece is arranged at the groove bottom of the pouring groove; the rail is provided with stiffening ribs in the extending direction of the rail; when the track and the pouring groove are assembled, the first limiting piece and the second limiting piece abut against the two ends, in the thickness direction, of the stiffening rib. The first limiting piece and the second limiting piece are preset in the pouring groove in advance, structural support is provided for improving the follow-up mounting and positioning precision, in other words, in the assembling process, only stiffening ribs on the track need to be clamped into a limiting structure formed by the first limiting piece and the second limiting piece, the track can be limited before pouring, and the assembling efficiency is improved. And the final pouring quality is prevented from being influenced by track shaking.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan blade performance testing equipment, and particularly relates to a fan blade test bench and a loading device track capable of improving positioning accuracy. Background Art

[0002] Wind energy is a clean, pollution-free and renewable energy source. Due to the environmental friendliness of wind power generation and the huge offshore wind energy reserves, the offshore wind power market is developing and growing rapidly. Along with the overall trend of industry development, considering the issue of the overall machine cost in the domestic wind power industry, the single-unit capacity of wind turbine units is continuously increased, and the size of fan blades also increases accordingly.

[0003] Since the operating conditions during the operation of fans are becoming more and more complex, before the new type of blades are officially put into production and use, a large number of static load and dynamic load experiments of the blades need to be carried out on the blade loading test bench to simulate the actual load-bearing conditions of the blades, so as to effectively improve the design efficiency in the product R & D process, further reduce the failure risk during the operation period after the actual machine is installed, and improve its structural safety.

[0004] In the existing fan blade test bench, the ground anchoring device is used as the connection point for vertical tension loading. The ground anchoring device is anchored on the track of the blade loading device, and the loading cable is pulled by controlling the motor to achieve the purpose of adjusting the blade loading load. During the use process, whether the track connection structure of the blade loading device is reliable in force is the key to the structural safety of the test bench; the larger the size of the blade to be detected, the higher the requirement for the loading capacity of the fan blade test bench.

[0005] However, the tracks adopted by the current fan blade test benches often reduce the quality after the track is poured due to poor installation positioning accuracy, resulting in the influence on the anti-pulling bearing capacity of the track structure, and thus being unable to bear the vertical tension generated during the fan blade test well. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is: how to provide a fan blade test bench and its loading device track to improve the quality after the track is poured, so as to meet the performance detection requirements of large-capacity fan blades.

[0007] To solve the above technical problem, the technical solution adopted by the utility model is:

[0008] A loading device track capable of improving positioning accuracy includes a pouring groove and a track arranged in the pouring groove. In the extending direction of the pouring groove, first limit pieces are arranged on both side walls of the pouring groove, and second limit pieces corresponding to the first limit pieces are arranged at the bottom of the pouring groove;

[0009] In the extending direction of the track, stiffening ribs are arranged on the track;

[0010] When the track is assembled with the casting groove, the first limiting member and the second limiting member abut against both ends of the stiffening rib in the thickness direction.

[0011] Further, the track includes a first channel steel, a second channel steel, and a third channel steel;

[0012] Support plates are provided at positions close to the notch on both side walls of the third channel steel;

[0013] The third channel steel and the support plates form an inverted Ω shape;

[0014] The notch direction of the third channel steel is the same as that of the casting groove;

[0015] The first channel steel and the second channel steel are respectively connected to the corresponding support plates, and the notches of the first channel steel and the second channel steel are respectively arranged opposite to the side walls of the corresponding casting grooves;

[0016] Stiffening ribs are provided inside both the first channel steel and the second channel steel.

[0017] Further, the distance between the bottom of the first channel steel and the bottom of the second channel steel is less than the groove pitch of the third channel steel.

[0018] Further, first positioning steel plates are provided on both side walls of the casting groove;

[0019] First positioning holes are provided on the first positioning steel plates;

[0020] One end of the first limiting member penetrates through the first positioning hole and is preset in the side wall of the casting groove;

[0021] When the track is assembled with the casting groove, the other end of the first limiting member is welded to one end of the stiffening rib in the thickness direction.

[0022] Further, a second positioning steel plate is provided at the bottom of the casting groove;

[0023] Second positioning holes are provided on the second positioning steel plates;

[0024] One end of the second limiting member penetrates through the second positioning hole and is preset in the bottom of the casting groove;

[0025] When the track is assembled with the casting groove, the other end of the second limiting member is welded to the other end of the stiffening rib in the thickness direction.

[0026] Further, a casting layer is further included;

[0027] After the track is assembled with the casting groove, the casting layer is filled between the track and the casting groove.

[0028] Furthermore, a fan blade test bench is also provided, which includes a bearing platform main body, a fan blade positioning seat, a cable, a ground anchoring device, and the loading device track capable of improving the positioning accuracy as described above;

[0029] The fan blade positioning seat is arranged on the working surface of the bearing platform main body;

[0030] The loading device track capable of improving the positioning accuracy is embedded in the bearing platform main body, and the opening of the loading device track capable of improving the positioning accuracy faces the working surface of the bearing platform main body;

[0031] The fan blade positioning seat is arranged at one end in the length direction of the loading device track capable of improving the positioning accuracy;

[0032] The ground anchoring device is slidably connected to the loading device track capable of improving the positioning accuracy;

[0033] When the fan blade to be detected is connected to the fan blade positioning seat, the loading device track capable of improving the positioning accuracy and the fan blade to be detected are located in the same vertical plane, and the fan blade to be detected is connected to the ground anchoring device through a cable.

[0034] Furthermore, the number of the loading device tracks capable of improving the positioning accuracy is at least three;

[0035] In the width direction of the fan blade to be detected, the loading device tracks capable of improving the positioning accuracy are arranged at intervals.

[0036] The beneficial effect of the present utility model lies in that: for the loading device track capable of improving the positioning accuracy provided by the present utility model, by presetting the first limiting member and the second limiting member in the pouring groove in advance, structural support can be provided for improving the subsequent installation and positioning accuracy. That is, during assembly, only by clamping the stiffening rib on the track into the limiting structure formed by the first limiting member and the second limiting member, a certain limiting effect on the track can be achieved before pouring, avoiding affecting the final pouring quality due to the shaking of the track. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The figure shows a schematic structural diagram of the track, the first limiting member, and the second limiting member of the specific embodiment of the present utility model;

[0038] Figure 2 The figure shows Figure 1 an enlarged view of part A of

[0039] Figure 3 The figure shows a schematic structural diagram of the track and the pouring groove member of the specific embodiment of the present utility model;

[0040] Figure 4The figure shows a schematic structural view of the track and the casting groove member (when filling the casting layer) of the specific embodiment of the present utility model;

[0041] Figure 5 The figure shows a schematic structural view of the fan blade test bench of the specific embodiment of the present utility model;

[0042] Label description:

[0043] 1. Casting groove; 11. First positioning steel plate; 12. Second positioning steel plate;

[0044] 2. Track; 21. Stiffening rib; 22. First channel steel; 23. Second channel steel; 24. Third channel steel; 25. Support plate;

[0045] 3. First limiting member;

[0046] 4. Second limiting member;

[0047] 5. Casting layer;

[0048] 6. Fan blade test bench; 61. Cap body; 62. Fan blade positioning seat; 63. Cable; 64. Ground anchoring device;

[0049] 7. Fan blade body. Specific embodiment

[0050] To illustrate in detail the technical content, the achieved purpose and the effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the drawings.

[0051] The most crucial concept of the present utility model lies in: by presetting the first limiting member and the second limiting member in the casting groove in advance, it provides structural support for improving the subsequent installation and positioning accuracy. That is, during assembly, only by clamping the stiffening rib on the track into the limiting structure formed by the first limiting member and the second limiting member, the track can be limited before casting, avoiding affecting the final casting quality due to the shaking of the track.

[0052] Please refer to Figures 1 to 5 , the loading device track capable of improving the positioning accuracy provided by the present utility model includes a casting groove 1 and a track 2 arranged in the casting groove 1. On both side walls of the casting groove 1 in the extending direction of the casting groove 1, first limiting members 3 are provided, and on the bottom of the casting groove 1, second limiting members 4 corresponding to the first limiting members 3 are provided;

[0053] In the extending direction of the track 2, the track 2 is provided with a stiffening rib 21;

[0054] When the track 2 and the casting groove 1 are assembled, the first limiting member 3 and the second limiting member 4 abut against both ends in the thickness direction of the stiffening rib 21.

[0055] Specifically, along the extending direction of the track 2, the stiffeners 21 are arranged on the track 2 at intervals.

[0056] As can be seen from the above description, the beneficial effects of the present utility model are as follows: providing a loading device track that can improve the positioning accuracy. By presetting the first limiting member 3 and the second limiting member 4 in the casting groove 1 in advance, it not only provides structural support for improving the subsequent installation and positioning accuracy, that is, during assembly, only by clamping the stiffeners 21 on the track 2 into the limiting structure formed by the first limiting member 3 and the second limiting member 4, the track 2 can be limited before casting, avoiding affecting the final casting quality due to the shaking of the track 2; but also can effectively improve the overall anti-pulling bearing capacity. That is, after the subsequent casting work is completed, since the two ends of the first limiting member 3 and the second limiting member 4 are respectively connected to the casting groove 1 and the subsequently cast casting structure, the connection points between the casting groove 1 and the casting structure can be increased, thereby enhancing the connection force between the casting groove 1 and the casting structure, providing structural support for the track 2 to meet the performance detection requirements of large-capacity fan blades.

[0057] Further, the track 2 includes a first channel steel 22, a second channel steel 23, and a third channel steel 24;

[0058] On both side walls of the third channel steel 24 near the notch, support plates 25 are provided;

[0059] The third channel steel 24 and the support plates 25 form an inverted Ω shape;

[0060] The notch direction of the third channel steel 24 is the same as the notch direction of the casting groove 1;

[0061] The first channel steel 22 and the second channel steel 23 are respectively connected to the corresponding support plates 25, and the notches of the first channel steel 22 and the second channel steel 23 are respectively arranged opposite to the side walls of the corresponding casting groove 1;

[0062] Stiffeners 21 are provided inside both the first channel steel 22 and the second channel steel 23.

[0063] Preferably, the first channel steel 22 and the second channel steel 23 are symmetrically arranged.

[0064] As can be seen from the above description, this design makes specific modifications to the composition structure of the track 2 and the positional relationship between the stiffeners 21 and the track 2. By forming the track 2 with the mutually spliced first channel steel 22, second channel steel 23, and third channel steel 24, and arranging stiffeners 21 inside both the first channel steel 22 and the second channel steel 23, it can provide structural support for the subsequent pull chain used for tensile testing to move directionally in the track and improve the positioning accuracy during track assembly.

[0065] Further, the distance between the bottom of the first channel steel 22 and the bottom of the second channel steel 23 is less than the groove pitch of the third channel steel 24. Specifically, the distance between the bottom of the first channel steel 22 and the bottom of the second channel steel 23 is α in Figure 2 ; the groove pitch of the third channel steel 24 is β in Figure 2 .

[0066] As can be seen from the above description, this design further improves the structure of the track 2. By ensuring that the distance between the bottom of the first channel steel 22 and the bottom of the second channel steel 23 is less than the groove pitch of the third channel steel 24, the clamping end of the zip fastener used for the subsequent tensile test can be better placed in the third channel steel 24; and when tightened, the zip fastener can be clamped with the first channel steel 22 and the second channel steel 23, thus preventing the zip fastener and the track 2 from being disengaged and affecting the normal detection work.

[0067] Further, first positioning steel plates 11 are provided on both side walls of the pouring groove 1;

[0068] First positioning holes are provided on the first positioning steel plates 11;

[0069] One end of the first limiting member 3 passes through the first positioning hole and is preset in the side wall of the pouring groove 1;

[0070] When the track 2 is assembled with the pouring groove 1, the other end of the first limiting member 3 is welded to one end in the thickness direction of the stiffening rib 21.

[0071] Further, a second positioning steel plate 12 is provided at the bottom of the pouring groove 1;

[0072] Second positioning holes are provided on the second positioning steel plates 12;

[0073] One end of the second limiting member 4 passes through the second positioning hole and is preset in the bottom of the pouring groove 1;

[0074] When the track 2 is assembled with the pouring groove 1, the other end of the second limiting member 4 is welded to the other end in the thickness direction of the stiffening rib 21.

[0075] Specifically, there are no special requirements for the shapes and materials of the first limiting member 3 and the second limiting member 4. Any rigid structure with a shape that can limit the stiffening rib 21 is acceptable. The first limiting member 3 of the present utility model is preferably a U-shaped steel bar; the second limiting member 4 is preferably a straight steel bar.

[0076] As can be seen from the above description, the structure of the pouring groove 1 has been further improved in this design. By arranging the first positioning steel plates 11 and the second positioning steel plates 12 on the side walls and the bottom of the pouring groove 1, and respectively arranging corresponding first positioning holes and second positioning holes on the first positioning steel plates 11 and the second positioning steel plates 12, the corresponding limiting members can be quickly preset at the specified positions before the first pouring to form the pouring groove 1, so as to effectively ensure that the accuracy between the stiffeners 21 on the subsequent installed track 2 and the limiting members can meet the design requirements.

[0077] Furthermore, the above loading device track capable of improving the positioning accuracy further includes a pouring layer 5;

[0078] When the track 2 is assembled with the pouring groove 1, the pouring layer 5 is filled between the track 2 and the pouring groove 1.

[0079] Specifically, the pouring layer 5 is made of any commercially available material that can improve the overall strength of the structure after solidification, such as a concrete layer.

[0080] As can be seen from the above description, the pouring layer 5 is a medium connecting the track 2 and the pouring groove 1. When the pouring layer 5 solidifies, it can effectively improve the overall strength. That is, the connection strength between the pouring layer 5 and the pouring groove 1 can be effectively improved through the first limiting member 3 and the second limiting member 4. Also, since the track 2 and the pouring groove 1 are also connected by the first limiting member 3 and the second limiting member 4, when the track 2 is subjected to an upward vertical pulling force, the pouring groove 1, the first limiting member 3, the second limiting member 4, the concrete layer, and the track 2 can be mutually pulled, so as to achieve the effect of improving the anti-pulling bearing capacity of the track.

[0081] The present utility model also provides a fan blade test bench, which includes a bearing platform main body 61, a fan blade positioning seat 62, a cable 63, a ground anchoring device 64, and the loading device track capable of improving the positioning accuracy according to any one of the above;

[0082] The fan blade positioning seat 62 is arranged on the working surface of the bearing platform main body 61;

[0083] The loading device track capable of improving the positioning accuracy is embedded in the bearing platform main body 61, and the opening of the loading device track capable of improving the positioning accuracy is arranged towards the working surface of the bearing platform main body 61;

[0084] The fan blade positioning seat 62 is arranged at one end in the length direction of the loading device track capable of improving the positioning accuracy;

[0085] The ground anchoring device 64 is slidably connected to the loading device track capable of improving the positioning accuracy;

[0086] When the fan blade to be detected is connected to the fan blade positioning seat 62, the loading device track that can improve the positioning accuracy and the fan blade to be detected are located in the same vertical plane, and the fan blade to be detected is anchored to the ground anchoring device 64 through a cable 63.

[0087] Specifically, a corresponding motor is also provided on the ground anchoring device 64, and the rotation of the motor is used to release the cable 63 (reduce the tension on the fan blade) and wind up the cable 63 (increase the tension on the fan blade).

[0088] As can be seen from the above description, this design makes specific improvements to the composition structure of the fan blade test bench 6, thereby providing structural support for the fan blade test bench 6 to be able to simulate the actual loading conditions of the fan blade.

[0089] Furthermore, the number of loading device tracks that can improve the positioning accuracy is at least three;

[0090] In the width direction of the fan blade to be detected, the loading device tracks that can improve the positioning accuracy are arranged at intervals.

[0091] As can be seen from the above description, this design further improves the composition structure of the fan blade test bench 6. By increasing the loading device tracks that can improve the positioning accuracy, it is convenient for the staff to set the ground anchoring device 64 on different loading device tracks that can improve the positioning accuracy according to actual needs. Thus, the fan blade test bench 6 of the present invention can simulate various different stress scenarios, enabling the finally obtained experimental data to truly reflect the performance of the fan blade, and further facilitating the staff to make timely adjustments to the process parameters during the production and manufacturing process to improve the quality of the fan blade.

[0092] The loading device track of the present invention that can improve the positioning accuracy can assist in the performance detection work of the fan blade.

[0093] Please refer to Figures 1 to 4 , Embodiment 1 of the present invention is:

[0094] A loading device track that can improve the positioning accuracy includes a casting groove 1, a casting layer 5, and a track 2 arranged in the casting groove 1. In the extending direction of the casting groove 1, first limiting members 3 are provided on both side walls of the casting groove 1, and second limiting members 4 corresponding to the first limiting members 3 are provided on the bottom of the casting groove 1; in the extending direction of the track 2, stiffening ribs 21 are provided on the track 2; when the track 2 is assembled with the casting groove 1, the first limiting members 3 and the second limiting members 4 abut against both ends in the thickness direction of the stiffening ribs 21.

[0095] The track 2 includes a first channel steel 22, a second channel steel 23 and a third channel steel 24; support plates 25 are provided at positions near the notch on both side walls of the third channel steel 24; the third channel steel 24 and the support plates 25 form an inverted Ω shape; the notch direction of the third channel steel 24 is the same as the notch direction of the pouring groove 1; the first channel steel 22 and the second channel steel 23 are respectively connected to the corresponding support plates 25, and the notches of the first channel steel 22 and the second channel steel 23 are respectively arranged opposite to the side walls of the corresponding pouring grooves 1; stiffening ribs 21 are provided in both the first channel steel 22 and the second channel steel 23; the distance between the bottom of the first channel steel 22 and the bottom of the second channel steel 23 is less than the groove spacing of the third channel steel 24.

[0096] First positioning steel plates 11 are provided on both side walls of the pouring groove 1; first positioning holes are provided on the first positioning steel plates 11; one end of the first limiting member 3 penetrates through the first positioning hole and is preset in the side wall of the pouring groove 1; when the track 2 is assembled with the pouring groove 1, the other end of the first limiting member 3 is welded to one end in the thickness direction of the stiffening rib 21; a second positioning steel plate 12 is provided at the bottom of the pouring groove 1; second positioning holes are provided on the second positioning steel plate 12; one end of the second limiting member 4 penetrates through the second positioning hole and is preset in the bottom of the pouring groove 1; when the track 2 is assembled with the pouring groove 1, the other end of the second limiting member 4 is welded to the other end in the thickness direction of the stiffening rib 21.

[0097] After the track 2 is assembled with the pouring groove 1, the pouring layer 5 is filled between the track 2 and the pouring groove 1.

[0098] Please refer to Figure 5 , the second embodiment of the present invention is as follows:

[0099] A fan blade test bench includes a base main body 61, a fan blade positioning seat 62, a cable 63, a ground anchoring device 64, and a loading device track capable of improving the positioning accuracy in the first embodiment; the fan blade positioning seat 62 is arranged on the working surface of the base main body 61; the loading device track capable of improving the positioning accuracy is embedded in the base main body 61, and the opening of the loading device track capable of improving the positioning accuracy faces the working surface of the base main body 61; the fan blade positioning seat 62 is arranged at one end in the length direction of the loading device track capable of improving the positioning accuracy; the ground anchoring device 64 is slidably connected to the loading device track capable of improving the positioning accuracy; when the fan blade to be detected is connected to the fan blade positioning seat 62, the loading device track capable of improving the positioning accuracy and the fan blade to be detected are located in the same vertical plane, and the fan blade to be detected is connected to the ground anchoring device 64 through the cable 63; the number of the loading device tracks capable of improving the positioning accuracy is three; in the width direction of the fan blade to be detected, the loading device tracks capable of improving the positioning accuracy are arranged at intervals.

[0100] The working principle of the present invention is as follows:

[0101] Installation and casting stage of the loading device track:

[0102] First, penetrate the first limiting member 3 and the second limiting member 4 through the corresponding first positioning plate and second positioning plate respectively, so that the first limiting member 3 and the second limiting member 4 are embedded in the main body 61 of the bearing platform; then, preliminarily place the track 2 in the casting groove 1 by means of hoisting, and ensure that all the stiffening ribs 21 on the track 2 can be embedded in the limiting structure formed by the corresponding first limiting member 3 and second limiting member 4, so that the first limiting member 3 and the second limiting member 4 can abut against both ends in the thickness direction of the corresponding stiffening rib 21, and at the same time, weld the first limiting member 3 and the second limiting member 4 to the stiffening rib 21; finally, fill the corresponding casting material between the casting groove 1 and the track 2, and wait for it to solidify to form the casting layer 5, thus completing the installation and casting work of the loading device track.

[0103] Detection stage of the wind turbine blade:

[0104] First, fix the wind turbine blade to be detected on the wind turbine blade positioning seat 62; then, according to the actual detection requirements, the staff slide a corresponding number of ground anchoring devices 64 into the corresponding loading device track through corresponding T-shaped bolts, and move the ground anchoring device 64 to the designated detection position; then, fix both ends of the cable 63 to the wind turbine blade to be detected and the ground anchoring device 64 respectively; finally, start the relevant tensioning device provided on the ground anchoring device 64 to tension or loosen the cable 63, so as to realize the pulling of the wind turbine blade and achieve the effect of simulating the actual working conditions.

[0105] In summary, a loading device track provided by the present utility model, by presetting the first limiting member and the second limiting member in the casting groove in advance, not only provides structural support for improving the subsequent installation and positioning accuracy, that is, during assembly, only need to snap the stiffening rib on the track into the limiting structure formed by the first limiting member and the second limiting member, then the track can be limited before casting, avoiding affecting the final casting quality due to the shaking of the track; but also can effectively improve the overall uplift bearing capacity, that is, after the subsequent casting work is completed, since both ends of the first limiting member and the second limiting member are respectively connected to the casting groove and the post-cast casting structure, the connection points between the casting groove and the casting structure can be increased, thereby improving the connection force between the casting groove and the casting structure, providing structural support for the track to meet the performance detection requirements of large-capacity wind turbine blades; at the same time, specific improvements are also made to the composition structure of the wind turbine blade test bench, providing structural support for the wind turbine blade test bench to simulate the actual loading conditions of the wind turbine blade.

[0106] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A loading device track capable of improving positioning accuracy, comprising a casting trough and a track arranged in the casting trough, characterized in that: In the extension direction of the casting trough, both side walls of the casting trough are provided with first limit pieces, and the bottom of the casting trough is provided with second limit pieces corresponding to the first limit pieces; In the extension direction of the track, the track is provided with stiffening ribs; When the track is assembled with the casting trough, the first stopper and the second stopper abut against two ends of the stiffening rib in the thickness direction.

2. The loading device track capable of improving positioning accuracy according to claim 1, characterized in that: The track includes a first channel steel, a second channel steel and a third channel steel; Support plates are provided on both side walls of the third channel steel near the notch; The third channel steel and the support plate form an inverted Ω shape; The notch direction of the third channel steel is consistent with the notch direction of the casting trough; The first channel steel and the second channel steel are respectively connected to the corresponding support plates, and the notches of the first channel steel and the notches of the second channel steel are respectively arranged opposite to the side walls of the corresponding casting grooves; Stiffening ribs are provided in the first channel steel and the second channel steel.

3. The loading device track capable of improving positioning accuracy according to claim 2, characterized in that: The distance between the groove bottom of the first channel steel and the groove bottom of the second channel steel is smaller than the groove spacing of the third channel steel.

4. The loading device track capable of improving positioning accuracy according to claim 1, characterized in that: Both side walls of the casting trough are provided with a first positioning steel plate; The first positioning steel plate is provided with a first positioning hole; One end of the first stopper passes through the first positioning hole and is preset in the side wall of the casting trough; When the track is assembled with the casting trough, the other end of the first limit piece is welded to one end of the stiffening rib in the thickness direction.

5. The loading device track capable of improving positioning accuracy according to claim 1, characterized in that: The bottom of the casting trough is provided with a second positioning steel plate; The second positioning steel plate is provided with a second positioning hole; One end of the second stopper passes through the second positioning hole and is preset in the bottom of the casting trough; When the track is assembled with the casting trough, the other end of the second stopper is welded to the other end of the stiffening rib in the thickness direction.

6. The loading device track capable of improving positioning accuracy according to claim 1, characterized in that: It also includes the pouring layer; When the track is assembled with the casting trough, the casting layer is filled between the track and the casting trough.

7. A fan blade test bench, characterized in that: It comprises a bearing platform body, a fan blade positioning seat, a cable, a ground anchoring device, and a loading device track capable of improving positioning accuracy as claimed in any one of claims 1 to 6; The fan blade positioning seat is arranged on the working surface of the support platform body; The loading device track capable of improving positioning accuracy is embedded in the platform body, and the opening of the loading device track capable of improving positioning accuracy is arranged toward the working surface of the platform body; The fan blade positioning seat is arranged at one end of the length direction of the loading device track which can improve the positioning accuracy; The ground anchoring device is slidably connected to the loading device track which can improve the positioning accuracy; When the wind blade to be tested is connected to the wind blade positioning seat, the loading device track which can improve the positioning accuracy and the wind blade to be tested are located in the same vertical plane, and the wind blade to be tested is connected to the ground anchor device through a cable.

8. The wind turbine blade test bench according to claim 7, characterized in that: The number of the loading device tracks capable of improving positioning accuracy is at least three; In the width direction of the wind turbine blade to be inspected, the loading device tracks that can improve positioning accuracy are arranged at intervals.

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