CN102589858A - Blade static loading bench and blade static test system - Google Patents

Abstract

The invention discloses a blade static loading platform and a blade static test system. The disclosed blade static loading platform includes a platform for fixing blades, and also includes a loading device and a displacement drive mechanism; the loading device includes a rotary drive mechanism, a base and a loading frame, and the loading frame is installed on the base through the rotary mechanism; the loading drive mechanism is installed on the loading frame. on the shelf; there is a track on the table body, and the base and the track are slidingly matched. When the blade is bent due to the force, there is a loading deflection angle between the blade normal of the loading point and the direction of the loading force or the loading deflection angle is too large, the loading device moves along the track relative to the platform, and the loading frame relative to the base Rotate, and then adjust the direction of the loading force without changing the position of the loading point, so that the direction of the loading force is consistent with the normal line of the blade at the loading point or the loading deflection angle between the two is maintained at a predetermined In this way, the difference between the loading force and the actual load in the normal direction of the blade at the loading point can be reduced.

Description

Blade static loading table and blade static test system

technical field

The invention relates to a test technology of wind power generation equipment, in particular to a blade static loading platform for loading blades of wind power generation equipment, and also relates to a blade static test system comprising the blade static loading platform.

Background technique

Wind power generation equipment includes blades and generators. The blades are used to absorb wind energy, convert wind energy into mechanical energy and drive generators to output electrical energy. The blade is a long strip structure, its root end is connected with the hub, and the tip protrudes outward. During the operation of wind power generation equipment, the blades rotate under the action of wind, and drive the input shaft of the generator to rotate through the hub, so that the generator outputs electric energy. The operating performance of blades directly determines the efficiency of energy conversion and determines whether wind power generation equipment can operate normally; therefore, blades have always been a key component of wind power generation equipment, and many countries have also promulgated technical standards related to blades.

Since the force of the blade is very complicated, and its load cannot be accurately determined, after production, it is necessary to test the relevant technical parameters of the blade to determine the actual bearing capacity of the blade; at the same time, on the basis of obtaining the relevant technical parameters, The model of the blade can be determined, thereby providing an accurate basis for determining the specifications of the blade series.

Among the relevant technical parameters of the blade, the static strength is the key data that characterizes the technical state of the blade. At present, the detection of the static strength of the blade is mainly through the loading mechanism to load the predetermined position of the blade, and obtain the corresponding strength parameter data according to the loading force and the deflection deformation generated by the blade. Chinese patent document CN201397251Y discloses a multifunctional blade test bench, which has structures such as a bench body and a test pit; when the blade is tested, the blade is first fixed, and the middle part of the blade is suspended; A crane or other lifting device loads the blade from above or from the side, completes the static strength test, and obtains the static strength parameters of the blade.

Please refer to FIG. 1 , which is a schematic diagram of the loading principle of the blade static strength test in the prior art. In the figure, the root end of the blade 100 is fixed, and five loading points 1, 2, 3, 4, and 5 are set from the blade root end to the blade tip, forming five loading forces F1, F2, F3, F4, and F5. During the loading process, as shown by the dotted line in the figure, the blade 100 will bend, and the position of each loading point will have a corresponding displacement change, and the displacement of each loading point will gradually increase from the root end to the tip. For example, at the first loading point, after the blade 100 is bent, there is a loading deflection angle between the direction of the force F1 and the normal of the blade at this position (the horizontal line perpendicular to the horizontal tangent passing through this point); In the normal direction, the actual loaded force at the loading point 1 of the blade 100 will be different from the force F1, therefore, the force F1 cannot represent the actual load at the loading point 1; similarly, the forces at other loading points It is not the same as the actual load of the corresponding loading point, nor can it represent the actual load of the corresponding loading point. In addition, due to the different bending curvatures of the blade 100, it is difficult to obtain accurate actual loads at each loading point through conversion; in this way, there will be errors between the static strength parameters of the blade 100 obtained according to the various forces and the actual static strength parameters of the blade 100 , and thus the technical state of the blade 100 cannot be accurately determined.

Therefore, how to improve the accuracy of the static strength parameters obtained from the blade static strength test is a technical problem to be solved by those skilled in the art.

Contents of the invention

The first object of the present invention is to provide a blade static loading table to reduce the difference between the loading force and the actual load in the normal direction of the blade at the corresponding loading point.

On the basis of providing the blade static loading table above, the second object of the present invention is to provide a blade static test system comprising the above blade static loading table, so as to obtain blade static strength parameters more accurately.

The blade static loading table provided by the present invention includes a table body, and one end of the table body has a fixing mechanism matched with the root end of the blade, so that the tip of the blade extends along the other end in the longitudinal direction, and also includes a loading device and a displacement driving mechanism; the loading device It includes a rotary drive mechanism, a loading drive mechanism, a base and a loading frame. The loading frame is installed on the base through a rotary mechanism, and the rotary drive mechanism drives the loading frame to rotate relative to the base; the loading drive mechanism is installed on the loading frame. on the frame; the two ends of the platform are respectively extended to the two ends of the track, and the base is slidingly matched with the track; the displacement driving mechanism drives the loading device to move along the track.

Optionally, the track extends linearly, and its extending direction is parallel to the length direction of the platform.

Optionally, the table body also includes an inverted "T" positioning track groove and a vertical positioning track surface, the base includes vertical force rollers and horizontal force rollers, the rolling surfaces of the vertical force rollers are in line with the The inner top surface of the inverted "T" positioning track groove cooperates, and the rolling surface of the horizontal force-bearing roller cooperates with the horizontal positioning surface.

Optionally, it includes two displacement drive mechanisms located on both sides of the loading device; the displacement drive mechanism includes two reels and two reversing mechanisms installed on the platform, and the reversing mechanism Including corresponding longitudinal fixed pulleys and horizontal fixed pulleys; one end of a steel wire rope is connected to the front of the loading device, and the other end is sequentially wound around a longitudinal fixed pulley and a horizontal fixed pulley of a reversing mechanism, and then wound on a drum; One end of the other steel wire rope is connected with the rear portion of the loading device, and the other end is wound around the longitudinal fixed pulley and the horizontal fixed pulley of another reversing mechanism in sequence, and then wound on another drum.

Optionally, the wire ropes on the two reels of the displacement driving mechanism are wound in opposite directions, and the rotation axes of the two reels coincide, and are driven by a power source.

Optionally, multiple loading devices and displacement drive mechanisms corresponding to the loading devices are included; the multiple loading devices are arranged along the longitudinal direction of the platform.

The blade static test system provided by the present invention includes a controller, a force sensor and any one of the above-mentioned blade loading test benches; the force sensor is used to obtain the loading force of the loading device on the blade; the controller is used to control the displacement drive mechanism and Rotary drive mechanism.

Optionally, the force applying end of the loading drive mechanism is connected to the loading point of the blade through a steel wire rope, and the force sensor is installed between the steel wire rope and the force applying end, or between the steel wire rope and the loading point of the blade.

Optionally, it also includes an angle detection device installed at the blade loading point, the angle detection device is used to detect the loading deflection angle between the blade normal of the blade loading point and the extension direction of the wire rope; the controller according to the angle detection device The obtained loading deflection controls the displacement drive mechanism and the slewing drive mechanism.

Optionally, the power source of the loading device is a servo motor, the power source of the displacement drive mechanism is a stepper motor, and the power source of the rotary drive mechanism is a synchronous servo motor.

The blade static loading table provided by the present invention includes a loading device and a displacement driving mechanism corresponding to the loading device in addition to the table body; the loading device includes a rotary driving mechanism, a loading driving mechanism, a base and a loading frame. The predetermined force can be applied to the predetermined loading point of the blade through the loading drive mechanism; when the blade is bent due to the force, a loading deflection angle or a loading deflection angle is generated between the normal line of the blade at the loading point and the direction of the force loaded by the loading drive mechanism. When it is large, the displacement drive mechanism can be used to drive the loading device to move along the track relative to the table body; at the same time, the rotary drive mechanism can be used to rotate the loading frame relative to the base, so that the loading drive mechanism can rotate a predetermined angle relative to the table body, and then without changing the blade In the case of the loading point position, adjust the direction of the loading force of the loading drive mechanism so that the loading direction of the force is consistent with the normal line of the blade at the loading point or keep the loading deflection angle between the two within a predetermined range In this way, the difference between the loading force of the loading drive mechanism and the actual load in the normal direction of the blade at the corresponding loading point can be reduced.

In a further technical solution, the track is extended in a straight line, and its extension direction is parallel to the length direction of the platform; this can more conveniently control the horizontal displacement and rotation angle of the loading device, and it is easier to adjust the loading force of the loading drive mechanism direction.

In a further technical solution, the table body also includes an inverted "T" positioning track groove and a vertical positioning track surface, the base includes horizontal force-bearing rollers and vertical force-bearing rollers, and the rolling surface of the vertical force-bearing rollers Cooperate with the inner top surface of the inverted "T" positioning track groove, and cooperate with the vertical positioning track surface of the horizontal force bearing roller. The vertical force roller can balance the overturning moment of the loading device, and the horizontal force roller can balance the horizontal force of the loading device. The combination of the two can maintain the overall stability of the loading device's movement.

In a further technical solution, the working stability and reliability of the displacement driving mechanism can be guaranteed through the cooperation of the reel and the wire rope; at the same time, the displacement driving mechanism is connected to the front and rear of the loading device through the wire rope, which can ensure the loading Stability of device movement.

In a further technical solution, the rotation axes of the two drums of the displacement driving mechanism coincide with each other and are driven by a power source. In this way, the working reliability of the displacement driving mechanism can be improved while ensuring the working stability of the displacement driving mechanism.

In a further technical solution, the blade static loading platform includes multiple loading devices and displacement drive mechanisms corresponding to the loading devices; the multiple loading devices are arranged in the longitudinal direction of the platform body. In this way, not only can multiple loading points of the blade be loaded at the same time, but also the blade static loading table can load blades of various types and lengths, thereby increasing the adaptability of the blade static loading table.

On the basis of providing the above-mentioned blade loading test rig, the provided blade static test system including the above-mentioned blade loading test rig also has corresponding technical effects.

In a further technical solution, the force application end of the loading drive mechanism is connected to the loading point of the blade through a steel wire rope, and the force sensor is installed between the steel wire rope and the force application end, or between the steel wire rope and the blade loading point. The accuracy of force detection can be improved by applying force to the blade by loading tension; the force sensor can directly detect the load force transmitted by the wire rope, which can improve the accuracy of measurement.

In a further technical solution, it also includes an angle detection device installed at the blade loading point, the angle detection device is used to detect the loading deflection angle between the blade normal line of the blade loading point and the extension direction of the steel wire rope; the controller according to The loading deflection angle obtained by the angle detection device controls the displacement drive mechanism and the slewing drive mechanism. Through the loading deflection angle fed back by the angle detection device, the controller controls the displacement drive mechanism and the rotation drive mechanism in real time, and then controls the displacement of the loading device relative to the table body and the rotation angle between the loading frame and the base in real time, so that the loading force The direction and the normal direction of the blade at the corresponding loading point are kept within a smaller range, further reducing the difference between the loading force and the actual load in the normal direction of the blade at the corresponding loading point, and improving the accuracy of the detection data of the blade static test system sex.

The power source of the loading device is a servo motor, the power source of the displacement drive mechanism is a stepper motor, and the power source of the rotary drive mechanism is a synchronous servo motor. In this way, on the one hand, the control of the blade static test system can be facilitated, and on the other hand, the control accuracy of the blade static test system can be improved.

Description of drawings

Fig. 1 is a schematic diagram of the loading principle of the blade static strength test in the prior art;

Fig. 2 is a schematic structural view of a blade static loading platform provided by an embodiment of the present invention;

Fig. 3 is a top view of the follow-up loading unit in the blade static loading platform provided by the embodiment of the present invention;

Fig. 4 is the A direction view of Fig. 3;

Fig. 5 is the B direction view of Fig. 3;

Fig. 6 is a schematic diagram of the loading principle of the blade static loading platform provided by the embodiment of the present invention;

Fig. 7 is a bottom perspective structural view of the loading device in the blade static loading platform provided by the present invention;

Fig. 8 is a control block diagram of the blade static test system provided by the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of a blade static loading platform provided by an embodiment of the present invention; for the convenience of description, a blade 100 is also shown in the figure.

The blade static loading table provided by the embodiment of the present invention includes a table body 200 and 5 loading units; wherein, the 5 loading units include two follower loading units 300 and three root loading units 400, and each loading unit has a loading drive mechanism , the force end of the loading drive mechanism is connected to the five loading points 1, 2, 3, 4, and 5 of the blade 100 through the steel wire rope 101; an appropriate clamp is usually set between the steel wire rope 101 and the loading point of the blade 100 to ensure that the steel wire rope 101 and the blade 100 The reliability of the connection between the 100 loading points and prevent damage to the surface of the blade 100. One end of the table body 200 is provided with a fixing mechanism, the root end of the blade 100 is fixed on the table body 200 through the fixing mechanism, and the tip of the blade 100 extends to the other end of the table body 200 along the longitudinal direction.

The root loading unit 400 includes a root loading frame and a loading driving mechanism installed on the root loading frame; the loading driving mechanisms of the three fixed loading units are connected to the loading points 3, 4 and 5 through a steel wire rope 101; the loading points 3, 4 and 5 are close to the root end of the blade 100. In order to facilitate the adjustment of the loading point and adapt to the loading needs of different lengths and different types of blades 100; The rail 210 is slidably fitted; like this, the loading rack of the fixed loading unit 400 can move relative to the table body 200 along the root rail 210, so that the loading driving mechanism of the root loading unit 400 can correspond to different positions of the blade 100, and then adjust the blade 100 accordingly. The location of the load point.

Please refer to Figures 3, 4 and 5. Figure 3 is a top view of the follower loading unit in the blade static loading platform provided by the embodiment of the present invention; Figure 4 is a view from the direction A of Figure 3; Figure 5 is a view from the direction B of Figure 3 .

The follower loading unit 300 includes a loading device 310 and two displacement driving mechanisms 320 . A track 220 is provided on the upper surface of the table body 200 corresponding to the follower loading unit 300 ;

The loading device 310 includes a rotary driving mechanism, a loading driving mechanism 314 , a base 311 and a loading frame 312 . The base 311 is slidingly matched with the track 220 so that the loading device 310 can move relative to the platform 200 along the track 220; The loading frame 312 is installed on the base 311 through the rotary mechanism 313, and the rotary axis of the rotary mechanism 313 is perpendicular to the horizontal plane, so that the loading frame 312 can rotate around the rotary axis in the horizontal plane relative to the base 311. The rotary drive mechanism (not shown) is used to drive the loading frame 312 to rotate relative to the base 311. The rotary drive mechanism can include a power source and a tooth map, and the power source output shaft can be provided with a gear meshed with the tooth map; the power source and the tooth diagram are installed on the loading frame 312 and the base 311 respectively, so that the loading frame 312 can be driven to rotate relative to the base 311 . The rotary drive mechanism can also be other existing specific structures.

The loading drive mechanism 314 is mounted on the loading frame 312 and is used to generate a loading force, and load a predetermined force on a predetermined loading point of the blade 100 . In this example, the loading driving mechanism 314 includes a power source and a reel, the power source drives the reel to rotate, the reel is wound with a steel wire rope 101, and the outer end of the steel wire rope 101 first goes around the fixed pulleys 3121, 3122 installed on the loading frame 312 Then extend to the loading point of the blade 100, so that the extending end of the steel wire rope 101 can be relatively fixed, avoiding the deflection of the extending end of the steel wire rope 101 caused by the different winding positions of the drum. At the same time, the installation positions of the fixed pulleys 3121 and 3122 have an appropriate height, so that the levelness between the steel wire rope 101 and the loading point of the blade 100 can be adjusted to improve the accuracy of detection.

The displacement driving mechanism 320 includes two reels 321 and two reversing mechanisms 322 installed on the table body 200 . 4 and 5, each reversing mechanism 322 includes a vertical fixed pulley 3221 and a horizontal fixed pulley 3222. The vertical fixed pulley 3221 is vertically and rotatably installed on the table body 200, and its rotation axis is in line with the extending direction of the track 220. Vertical; the horizontal fixed pulley 3222 is also vertically and rotatably installed on the table body 200, but its rotation axis is parallel to the extending direction of the track 220, that is, its rotation axis is perpendicular to the rotation axis of the corresponding vertical fixed pulley 3221. In this example, the position of the horizontal fixed pulley 3222 is higher than that of the longitudinal fixed pulley 3221, and the vertical tangent outside the wire groove of the horizontal fixed pulley 3222 corresponds to the vertical tangent outside the wire groove of the vertical fixed pulley 3221. One end of a wire rope 323 is connected to the front of the loading device 310, specifically the front of the base 311 (towards the blade 100), and the other end first goes around the left side (with reference to FIG. 5 ) of the reversing mechanism 322 from below. The vertical fixed pulley 3221 extends vertically upwards; then extends horizontally, bypasses above the horizontal fixed pulley 3222 of the reversing mechanism 322 , and then winds on a drum 321 . Equally, one end of another wire rope 324 links to each other with the rear portion of base 311, and the other end first extends vertically upwards around the longitudinal fixed pulley 3221 of another reversing mechanism 322 from below, and then extends laterally. Go around above the pulley 3222, and then wind on another drum 321; the wire ropes 323 and 324 wind on the two drums 321 in opposite directions. In this example, the rotation axes of the two drums 321 coincide and are driven by one power source. The two displacement driving mechanisms 320 are respectively located on both sides of the loading device 310; and are arranged symmetrically. The displacement driving mechanism 320 on the right side (with reference to FIG. 3 ) is connected to the front and the rear of the base 311 through wire ropes 325 and 326 respectively.

The working principle of the above-mentioned displacement drive mechanism 320 is: when the power source drives the two reels 321 of the displacement drive mechanism 320 on the left side to rotate, since the steel wire ropes 323 and 324 on the two reels 321 wind in opposite directions, the two reels can pass The steel wire ropes 323, 324 drive the loading device 310 to move to the left; at this time, the two reels 321 of the right displacement driving mechanism 320 rotate in corresponding directions, and the two steel wire ropes 325, 326 are released. In the same principle, when the power source drives the reel 321 of the right displacement drive mechanism to rotate, it can also drive the loading device 310 to move to the right.

According to the above description, the winding method of the wire rope 323 is not limited to the above method, and the wire rope 323 can be wound in different directions according to the position of the horizontal fixed pulley 3222 and the vertical fixed pulley 3221 . For example, when the position of the horizontal fixed pulley 3222 is lower than that of the vertical fixed pulley 3221, one end of the steel wire rope 323 can go around the vertical fixed pulley 3221 from above, and then extend vertically downwards, first crossing the horizontal fixed pulley 3222, and then winding to on the reel 321; similarly, other wire ropes can be wound accordingly according to the actual situation.

Please refer to FIG. 6 . FIG. 6 is a schematic diagram of a loading principle of a blade static loading platform provided by an embodiment of the present invention.

The five loading units respectively load the five loading points of the blade through their loading drive mechanisms; during the loading process, each part of the blade 100 will produce corresponding deformations, and the deformation at the loading point 1 and loading point 2 near the tip is relatively large. Make the blade normal at this loading point (as shown by the dotted line in the figure) gradually deflect. Now, as shown by the straight arrow of the follow-up loading unit 300 in Figure 6, the loading device 310 of the follow-up loading unit 300 can be driven by the displacement drive mechanism 320 to move to the right along the track 220 relative to the platform 200; meanwhile, as shown in Figure 6 As shown by the rotation arrow in the follow-up loading unit 300, the loading frame 312 is rotated relative to the base 311 through the rotary drive mechanism, and the loading drive mechanism 314 is rotated by a predetermined angle relative to the table body 200, and then the loading point 1 and the loading point are not changed. In the case of 2 positions, adjust the direction of the loading force of the loading drive mechanism 314 of the loading device 310, so that the direction of the loading force is consistent with the normal line of the blade at the corresponding loading point or the loading deflection angle between the two is kept at a predetermined In this way, in each follower loading unit 300, the difference between the loading force of the loading drive mechanism and the actual load on the blade normal direction at the corresponding loading point of the blade 100 can be reduced.

For loading points 3, 4 and 5, since the deformation of the blade 100 at this position is small and the normal deviation of each blade is small, the direction of the loading force of the fixed loading unit 400 can be kept unchanged.

Please refer to FIG. 5 in conjunction with FIG. 7 . FIG. 7 is a bottom perspective structural view of the loading device in the blade static loading platform provided by the present invention. The base 311 includes a vertical force roller 3112 and a horizontal force roller 3113. The vertical force roller 3112 can rotate on the body of the installation base 311, and its rotation axis is parallel to the horizontal plane; the horizontal force roller 3113 can rotate on the body of the installation base 311. Its axis of rotation is perpendicular to the horizontal plane. Corresponding to the vertical force roller 3112 and the horizontal force roller 3113, an inverted "T" positioning track groove 201 and a positioning track groove including a vertical positioning track surface 202 are formed on the upper surface of the table body 200, and the vertical positioning track surface 202 faces Loading device 310 rear. The rolling surface of the vertical stressed roller 3112 cooperates with the inner top surface of the inverted "T" positioning track groove 201, and the rolling surface of the horizontal stressed roller 3113 cooperates with the vertical positioning track surface 201. In this way, the vertical force bearing roller 3112 can balance the overturning moment of the loading device 310, and the horizontal force bearing roller 3113 can balance the horizontal force of the loading device 310, and the combination of the two can maintain the overall stability of the loading device 310's motion . In this example, the loading frame 312 is a truss structure, and in order to improve the stability of the loading frame 312 , a counterweight may also be provided at the rear part facing away from the blade 100 .

According to the above description, it can be understood that the track 210 is not limited to be a linear track, and can also be a track of other shapes, as long as its two ends extend respectively to the two ends of the table body 200, so that the loading device 310 can be positioned relative to the table body 200 in the longitudinal direction. Producing relative displacement just can realize the purpose of the invention. In addition, the displacement driving mechanism 320 is not limited to the above structure, and may also be other mechanisms capable of driving the loading device 310 to slide along a predetermined track, such as a screw guide mechanism, a rack and pinion mechanism, and the like.

On the basis of providing the above-mentioned blade loading test bench, the blade static test system provided by the present invention includes a controller, a force sensor and the above-mentioned blade loading test bench.

Please refer to FIG. 8 , which is a control block diagram of the blade static test system provided by the present invention. The output end of the controller 710 is connected with the displacement drive mechanism 320 and the rotary drive mechanism 315, and is used to control the power source of the displacement drive mechanism 320 and the power source of the rotary drive mechanism 315 respectively, so as to control the loading devices 310 by the displacement drive mechanism 320. position, and control the force direction of the loading drive mechanism 314 in the follow-up loading unit 300 through the rotary drive mechanism 315; of course, the power source of the load drive mechanism 314 in the follow-up loading unit 300 can also be controlled by the controller 710 to control The force generated by the loading drive mechanism 314; of course, the controller 710 can also simultaneously control the power source of the loading drive mechanism in the root loading unit.

The force sensor is used to acquire the force exerted by each loading device on each loading point of the blade 100, and transmit the acquired relevant data to an appropriate processor. By using the above-mentioned blade loading test bench, the load borne by each loading point of the blade 100 in the blade normal direction can be obtained more accurately, thereby providing a reliable basis for calculating parameters related to the static strength of the blade. The installation position of the force sensor can be set according to actual needs, preferably installed between the steel wire rope 101 and the force application end of the loading drive mechanism 314, or between the steel wire rope 101 and the corresponding blade loading point, so as to obtain by direct measurement The loading force of the loading driving mechanism; it can also be installed at the position related to the fixed pulleys 3121, 3122 shown in FIG.

In order to ensure the consistency between the normal line of the blade at each loading point and the direction of the loading force, and improve the control automation; the blade static test system also includes two angle detection devices 720 installed on the loading point 1 and the loading point 2 of the blade 100 . The angle detection device 720 is connected to the input end of the controller 710, and is used to detect the loading deflection angle between the blade normal of the loading point 1 and the loading point 2 and the extension direction of the corresponding steel wire rope 101; the controller 710 obtains according to the angle detection device 720 The loading deflection angle controls the displacement drive mechanism 320 and the slewing drive mechanism 315 in real time, so that the normal line of the blade at the loading point 1 and the loading point 2 is consistent with the extension direction of the corresponding steel wire rope 101 as much as possible, or the loading deflection angle between the two is reduced , to reduce the difference between the loading force and the actual load of the corresponding loading point of the blade in the normal direction of the blade, and improve the accuracy of the detection data of the blade static test system.

In order to improve the accuracy of control, in the embodiment of the present invention, the power source of the loading drive mechanism 314 is a servo motor, the power source of the displacement drive mechanism 320 is a stepper motor, and the power source of the rotary drive mechanism 315 is a synchronous servo motor; On the one hand, it can facilitate the control of the blade static test system, and on the other hand, it can improve the control accuracy of the blade static test system. Certainly, the power source of each driving mechanism can be selected according to actual needs, for example, it can be a hydraulic component.

The above description is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the present invention, such as loading the drive mechanism 314 is not limited to loading the blade 100 by pulling force, but can also load the blade 100 by pushing or pressing, and these improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims (10)

1. A blade static loading platform, comprising a platform body, one end of the platform body has a fixing mechanism matched with the root end of the blade, so that the tip of the blade extends along the other end in the longitudinal direction, and it is characterized in that it also includes a loading device and a displacement driving mechanism The loading device includes a rotary drive mechanism, a loading drive mechanism, a base and a loading frame, the loading frame is installed on the base through a rotary mechanism, and the rotary drive mechanism drives the loading frame to rotate relative to the base; the loading The driving mechanism is installed on the loading frame; the two ends of the table body have rails respectively extending toward the two ends of the table body, and the base is slidingly matched with the rails; the displacement driving mechanism drives the loading device to move along the rails. 2 . The blade static loading platform according to claim 1 , wherein the track extends linearly, and its extending direction is parallel to the length direction of the platform body. 3 . 3. The blade static loading table according to claim 2, characterized in that, the table body also includes an inverted "T" positioning track groove and a vertical positioning track surface, and the base includes vertical force bearing rollers and horizontal force bearing Roller, the rolling surface of the vertical stressed roller matches the inner top surface of the inverted "T" positioning track groove, and the rolling surface of the horizontal stressed roller matches the horizontal positioning surface. 4. The blade static loading platform according to claim 2, characterized in that it comprises two displacement driving mechanisms respectively located on both sides of the loading device; the displacement driving mechanism comprises two displacement driving mechanisms installed on the platform body Drum and two reversing mechanisms, the reversing mechanism includes corresponding longitudinal fixed pulleys and horizontal fixed pulleys; one end of a steel wire rope is connected to the front of the loading device, and the other end sequentially goes around a longitudinal fixed pulley of a reversing mechanism The pulley and the horizontal fixed pulley are wound on a drum; one end of the other wire rope is connected to the rear of the loading device, and the other end is wound around the longitudinal fixed pulley and the horizontal fixed pulley of another reversing mechanism in sequence, and then wound on another on a roll. 5. The blade static loading platform according to claim 4, characterized in that, the wire ropes on the two reels of the displacement drive mechanism are wound in opposite directions, and the rotation axes of the two reels coincide, and are driven by a power source . 6. The blade static loading platform according to any one of claims 1-5, characterized in that it comprises a plurality of loading devices and a displacement drive mechanism corresponding to the loading devices; a plurality of loading devices are arranged along the longitudinal direction of the table body . 7. A blade static test system, characterized in that it comprises a controller, a force sensor and the blade loading test bench according to any one of claims 1-6; the force sensor is used to obtain the loading effect of the loading device on the blade force; the controller is used to control the displacement drive mechanism and the rotary drive mechanism. 8. The blade static test system according to claim 7, wherein the force end of the loading drive mechanism is connected to the loading point of the blade through a wire rope, and the force sensor is installed between the wire rope and the force end, or installed on the wire rope and the loading point of the blade. 9. The blade static test system according to claim 8, further comprising an angle detection device installed at the blade loading point, the angle detection device is used to detect the difference between the blade normal line of the blade loading point and the extension direction of the wire rope. The loading deflection angle between them; the controller controls the displacement drive mechanism and the rotary drive mechanism according to the load deflection angle obtained by the angle detection device. 10. The blade static test system according to any one of claims 7-9, wherein the power source of the loading device is a servo motor, the power source of the displacement drive mechanism is a stepping motor, and the rotary The power source of the driving mechanism is a synchronous servo motor.

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