CN110987628A - Photovoltaic tracking system support mechanical testing device and method - Google Patents
Photovoltaic tracking system support mechanical testing device and method Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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Abstract
The invention discloses a mechanical test device for a photovoltaic tracking system bracket, wherein a base is provided with a mounting seat for mounting a structural member to be tested; a supporting frame is further arranged on one side of the mounting seat on the base, a force detection device and a transmission mechanism are arranged on the supporting frame, and the force detection device is used for connecting a structural part to be detected so as to detect the tensile force or the torsion applied to the structural part to be detected; the output end of the transmission mechanism is connected with the force detection device into a whole and is used for driving the force detection device to move relative to the structural part to be detected; the force detection device is also connected with a displacement detection device, and the displacement detection device is used for detecting the movement distance change of the force detection device relative to the structural part to be detected; therefore, the power detection device is driven to move relative to the structural part to be tested through the driving action of the transmission mechanism, so that the tensile force or the torsion force applied to the structural part to be tested is changed, and the simulation of the tensile and/or torsion resistant test working condition of the structural part to be tested is realized. And discloses a corresponding test method. The invention has simple structure, convenient test and accurate measurement result.
Description
Technical Field
The invention belongs to the technical field of photovoltaic tracking systems, and relates to a mechanical testing device and method for a photovoltaic tracking system support.
Background
In a photovoltaic tracking system, in order to optimize the use of sunlight, a photovoltaic module is mounted on a support, and the inclination angle of the photovoltaic module is tracked and adjusted according to the change of the irradiation angle of the sun. The existing strength design of the photovoltaic tracking system support is closely related to aspects such as project landform, environment, soil texture and the like, so that different requirements for the strength design of the support key structure node are required for different project places, and equipment capable of testing the mechanical strength of the support key structure node is required.
Therefore, it is very necessary for those skilled in the art to provide a mechanical testing apparatus and method for a photovoltaic tracking system support, which has a simple structure, is convenient for mechanical testing of the support key structure nodes, and has accurate measurement.
Disclosure of Invention
The invention aims to provide a photovoltaic tracking system support mechanical testing device and method which are simple in structure, convenient for mechanical testing of support key structure nodes and accurate in measurement. By the test equipment and the test method, different mechanical strengths can be designed for different support key structure nodes according to different aspects of project landform, environment, soil texture and the like.
The technical scheme provided by the invention is as follows:
a mechanical test device for a photovoltaic tracking system bracket comprises a base, wherein a mounting seat for mounting a structural member to be tested is arranged on the base;
the base is further provided with a support frame on one side of the mounting seat, the support frame is provided with a force detection device and a transmission mechanism, and the force detection device is used for connecting a structural part to be detected so as to detect the tensile force or the torsion applied to the structural part to be detected; the output end of the transmission mechanism is connected with the force detection device into a whole and is used for driving the force detection device to move relative to the structural part to be detected;
the force detection device is also connected with a displacement detection device, and the displacement detection device is used for detecting the movement distance change of the force detection device relative to the structural part to be detected;
therefore, the force detection device is driven to move relative to the structural part to be tested through the driving action of the transmission mechanism, so that the tensile force or the torsion force applied to the structural part to be tested is changed, and the simulation of the tensile and/or torsion resistant test working condition of the structural part to be tested is realized.
Preferably, the transmission mechanism comprises a worm and gear transmission unit and a motor which are arranged on the support frame;
the worm and gear transmission unit comprises a first worm and gear transmission unit and a second worm and gear transmission unit; the first worm gear and worm transmission unit comprises a first worm gear and a first worm which are meshed, and the second worm gear and worm transmission unit comprises a second worm gear and a second worm which are meshed; the output end of the motor is in driving connection with the input end of the first worm, and the output end of the first worm is in driving connection with the input end of the second worm through a connecting shaft; output shafts are arranged in the first worm wheel and the second worm wheel respectively, screw sections with external threads are arranged on the output shafts, external threads of the screw sections are in threaded fit with internal threads of the first worm wheel and the second worm wheel, and the output shafts of the first worm wheel and the second worm wheel are rotatably embedded in the support frame at one side of the screw sections respectively and are connected with the force detection device;
therefore, the motor drives the first worm to rotate and then drives the first worm wheel, the adjacent second worm and the second worm wheel to synchronously rotate, and the first worm wheel and the second worm wheel drive the power detection device to move towards or away from the structural part to be detected while rotating along the screw thread of the screw rod section on the output shaft.
Furthermore, the force detection device comprises a force transmission rod and a force sensor, wherein the force transmission rod is used for connecting a structural part to be detected; the force sensors are respectively arranged at two ends of the force transmission rod, 1 force sensor is arranged at each end, the number of the force sensors is 2, and the force sensors at the two ends respectively form force application detection ends;
output shafts in the first worm wheel and the second worm wheel are in one-to-one correspondence and integrated connection with the force sensors at two ends on one side of the screw rod section;
two force application detection ends on the 2 force sensors are respectively sleeved at two ends of the force transmission rod and used for detecting the tensile force or the torsion applied to the structural part to be detected.
Furthermore, a force arm structure is arranged at the top of the structural part to be tested, and the force arm structure, the force transmission rod and the force sensor are parallel to each other;
the two ends of the force arm structure are used for being correspondingly connected with the two ends of the force transmission rod at the same side, so that tension or torsion, unloading tension or torsion is loaded on the structural part to be tested in the process that the motor driving force detection device moves away from or towards the structural part to be tested.
Furthermore, the two ends of the force arm structure connected with the force transmission rod are correspondingly flush with each other;
the height of the force arm structure is flush with the force transmission rod;
therefore, the direction of the pulling force applied to the two ends of the force arm structure is perpendicular to the force transmission rod and the force sensor.
Furthermore, the arm structure and the two flush ends of the force transmission rod are directly and correspondingly connected at the same side, and the arm structure is used for testing the tensile strength of the structural part to be tested.
Furthermore, one end of the force arm structure is connected with one end of the force transmission rod, which is positioned on the same side, and the other end of the force arm structure faces the direction away from the force detection device and winds around the other force application detection end connected to the force transmission rod through a steering mechanism, so that the stress directions of the two ends of the force arm structure are consistent, and the force arm structure is used for testing the torsional strength of the structural part to be tested.
Further, the steering mechanism is set as a fixed pulley;
the fixed pulley is installed on the base along the horizontal direction through a fixed frame, and the fixed frame is arranged on one side, far away from the supporting frame, of the installation seat.
Furthermore, the displacement detection device comprises a displacement sensor, the telescopic tail end of the displacement sensor is arranged on the force transmission rod, and the other shell end is arranged on the support frame.
Furthermore, the test equipment also comprises a control cabinet, wherein the mechanical sensor, the displacement sensor and the motor are electrically connected with the control cabinet;
the motor is provided with limit switches at the maximum and minimum rotating angles, and the limit switches are connected with the controller cabinet.
The invention utilizes the mechanical test equipment for the photovoltaic tracking system bracket, and can also provide a mechanical test method for the photovoltaic tracking system bracket, which comprises the following steps:
the tensile strength was tested by the following procedure:
s1, mounting the structural part to be tested on a mounting seat of the test equipment; wherein, a force arm structure is designed at the top end of the structural part to be tested;
s2, correspondingly connecting two ends of the force arm structure with the same sides of the two ends of the force detection device respectively;
s3, controlling the motor to rotate forward and backward, and driving the power detection device to move away from or towards the structural part to be tested by the transmission mechanism to realize the process of loading or unloading tension on the structural part to be tested; meanwhile, test data of the tension and the displacement are collected through the force detection device and the displacement detection device, and finally a relation curve of the tension and the displacement is obtained for judging whether the tensile strength of the structural member can meet the design requirements.
Alternatively, the torsional strength is tested by the following steps:
s1, mounting the structural part to be tested on a mounting seat of the test equipment; wherein, a force arm structure is designed at the top end of the structural part to be tested;
s2, connecting one end of the force arm structure with one end of the force detection device on the same side, and connecting the other end of the force arm structure to the other end of the force detection device after winding through a steering mechanism in a direction away from the force detection device, so as to realize the consistency of the stress directions of the two ends of the force arm structure;
s3, controlling the motor to rotate forward and backward, driving the power detection device to move away from or towards the structural part to be tested by the transmission mechanism, realizing the process of loading or unloading torsion on the structural part to be tested, simultaneously acquiring test data of the torsion and displacement through the power detection device and the displacement detection device, and finally obtaining a relation curve of the torsion and the displacement, wherein the relation curve is used for judging whether the torsion strength of the structural part can meet the design requirement.
The invention can bring the following beneficial effects:
1) in the testing equipment and the method, the force detection device is driven to move relative to the structural part to be tested through the driving action of the transmission mechanism, the pulling force or the torsion force applied to the structural part to be tested is changed in the moving stroke of the force detection device relative to the structural part to be tested, the corresponding stress (the pulling force or the torsion force) and displacement data in the stroke range are respectively obtained through the force detection device and the displacement detection device, finally, a relation curve of the pulling force or the torsion force and the displacement can be obtained, and whether the tensile strength and the torsional strength of the structural part to be tested can meet the design requirements or not is judged. Therefore, the testing equipment is simple, and the testing process is convenient.
2) The testing equipment of the invention is additionally provided with the force arm structure at the top of the structural part, one end of the force arm structure is directly connected with a force application detection end of the force detection device, the other end of the force arm structure enables the stress directions of the two ends of the force arm structure to be consistent after turning, the loading and unloading process of the torsion force is realized through the positive and negative rotation of the motor, the force sensor and the displacement detection device collect the testing data in the process, finally the relation curve of the torsion force and the displacement is obtained, and whether the torsion strength of the structural part can meet the design requirement is judged. Therefore, on the basis of simple structure, the torsion resistance test is realized through the matching of the worm gear transmission unit, the force sensor and the force transmission rod.
3) In the test equipment, the force arm structure is additionally arranged at the top of the structural part to be tested, two ends of the structural part to be tested are correspondingly connected with two ends of the force transmission rod, the positive and negative rotation of the motor is controlled to realize the process of loading and unloading the tensile force, the force sensor can acquire tensile force test data in the process, the displacement detection device acquires displacement test data in the process, and finally a relation curve of the tensile force and the displacement can be obtained to judge whether the tensile strength of the structural part can meet the design requirement. .
4) According to the test equipment and the test method, the tensile force or the torsion force applied to the structural part to be tested by the transmission mechanism is transmitted through the two ends of the force arm structure, so that the stress condition of the structural part to be tested under the conditions of strong wind, gust and the like can be simulated, and the test data is more accurate.
Drawings
FIG. 1 is a schematic structural diagram of a testing apparatus according to the present invention.
FIG. 2 is a top view of the test apparatus of the present invention.
Figure 3 is an isometric view of the test apparatus of the present invention with the structure under test installed.
Fig. 4 is an enlarged structural view of the transmission mechanism and the force detecting device of the present invention.
FIG. 5 is a graph showing the results of an actual tensile test using the test apparatus of the present invention.
FIG. 6 is a graph showing the results of an actual torsion resistance test using the test apparatus of the present invention.
The meaning of the reference symbols in the figures is:
1-a base, 10-a mounting seat, 11-a support frame and 12-a fixing frame;
2-a transmission mechanism, 20-a motor, 21-a connecting shaft and 22-an output shaft;
3-a force detection device; 4-a steering mechanism; 5-force arm structure; 6-the structural member to be tested.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
As shown in fig. 1 and 2, the present embodiment is a mechanical testing device for a photovoltaic tracking system bracket, including a base 1, where an installation base 10 for installing a structural member 6 to be tested is arranged on the base 1;
a support frame 11 is further arranged on one side of the mounting seat 10 on the base 1, a force detection device 3 and a transmission mechanism 2 are arranged on the support frame 11, and the force detection device 3 is used for connecting a structural part 6 to be detected so as to detect the tensile force or the torsion applied to the structural part 6 to be detected; the output end of the transmission mechanism 2 is connected with the force detection device 3 into a whole and is used for driving the force detection device 3 to move relative to the structural part 6 to be detected;
the force detection device 3 is also connected with a displacement detection device, and the displacement detection device is used for detecting the distance change generated by the movement of the force detection device 3 relative to the structural part 6 to be detected;
therefore, the force detection device 3 is driven to move relative to the structural part 6 to be tested through the driving action of the transmission mechanism 2, so that the tensile force or the torsion force applied to the structural part 6 to be tested is changed, and the simulation of the tensile and/or torsion resistant test working condition of the structural part 6 to be tested is realized.
In this embodiment, in the movement stroke of the force detection device relative to the structural member 6 to be detected, the pulling force or the torsion force applied to the structural member 6 to be detected (such as an upright post) changes, the corresponding force applied (the pulling force or the torsion force applied) and displacement data within the stroke range are obtained through the force detection device and the displacement detection device, and finally, a relationship curve between the pulling force or the torsion force and the displacement is obtained, so as to determine whether the tensile strength and the torsional strength of the structural member 6 to be detected can meet the design requirements.
Example 2
As shown in fig. 1 and 2, the present embodiment is a mechanical testing device for a photovoltaic tracking system bracket, including a base 1, where an installation base 10 for installing a structural member 6 to be tested is arranged on the base 1;
a support frame 11 is further arranged on one side of the mounting seat 10 on the base 1, a force detection device 3 and a transmission mechanism 2 are arranged on the support frame 11, and the force detection device 3 is used for connecting a structural part 6 to be detected so as to detect the tensile force applied to the structural part 6 to be detected; the output end of the transmission mechanism 2 is connected with the force detection device 3 into a whole and is used for driving the force detection device 3 to move relative to the structural part 6 to be detected; wherein:
the worm and gear transmission unit comprises a first worm and gear transmission unit and a second worm and gear transmission unit; the first worm gear and worm transmission unit comprises a first worm gear and a first worm which are meshed, and the second worm gear and worm transmission unit comprises a second worm gear and a second worm which are meshed; the output end of the motor (the motor is preferably a speed reducing motor) is in driving connection with the input end of the first worm, and the output end of the first worm is in driving connection with the input end of the second worm through a connecting shaft 21; the first worm wheel and the second worm wheel are internally provided with output shafts 22, the output shafts 22 are provided with screw sections with external threads, the external threads of the screw sections are in threaded fit with the internal threads of the first worm wheel and the second worm wheel, and the output shafts 22 of the first worm wheel and the second worm wheel are respectively rotatably embedded in the support frame 11 at one side of the screw sections and are connected with the force detection device 3; (ii) a
The force detection device 3 is also connected with a displacement detection device, and the displacement detection device is used for detecting the distance change generated by the movement of the force detection device relative to the structural part to be detected 6;
therefore, the motor 20 drives the first worm to rotate and then drives the meshed first worm wheel, the adjacent second worm and the second worm wheel to synchronously rotate, the first worm wheel and the second worm wheel rotate along the screw thread of the screw section on the output shaft 22 and simultaneously drive the force detection device 3 connected with one side of the screw section to move towards or away from the structural part 6 to be tested, so that the tensile force or the torsion force applied to the structural part 6 to be tested is changed, and the simulation of the tensile and/or torsion resistant test working condition of the structural part 6 to be tested is realized.
As a preferred embodiment, as shown in fig. 4, the force detection device 3 includes a force transmission rod 31 for connecting the structural member 6 to be measured, a force sensor 30; the force sensors 30 are respectively arranged at two ends of the force transmission rod 31, 1 force sensor at each end is set to be 2 force sensors in total, and the force sensors 30 at the two ends respectively form force application detection ends; the output shafts in the first worm wheel and the second worm wheel are integrally connected with the force sensors 30 at two ends in a one-to-one correspondence manner on one side of the screw section, so that the first worm wheel and the second worm wheel drive the force sensors 30 and the force transmission rods 31 to move towards or away from the structural part 6 to be tested while rotating along the screw thread of the screw section on the output shaft 22; two force application detection ends on the 2 force sensors 30 are respectively sleeved at two ends of the force transmission rod 31 and used for detecting the tensile force or the torsion force applied to the structural part 6 to be detected.
In this embodiment, only need set up 2 sensors at the both ends of power transmission rod 31, it establishes two application of force detection ends on power transmission rod 31 both ends correspondingly to form the cover, and simultaneously, the structure 6 that awaits measuring links to each other with the power transmission rod, under the drive of motor and drive mechanism's transmission effect, when making the two take place relative motion, force sensor 30 at first takes power transmission rod 31, and then power transmission rod drives the structure 6 motion that awaits measuring, at this in-process, exert pulling force or torsion to the structure 6 that awaits measuring, be convenient for follow-up tensile strength test or the torsional strength test to certain size structure, thereby reduce cost under the prerequisite that satisfies the test function. The transmission rod 31 is arranged to keep the force sensors 30 at both ends on the same horizontal plane, thereby improving the balance of the stress. It should be noted that the force application detection end of the force sensor mentioned in the present embodiment is also the connection end for transmitting the power from the transmission mechanism 2 and the force sensor to the structural member 6 to be measured through the force transmission rod 30, thereby applying the pulling force to the structural member 6 to be measured and detecting the force value. More specifically, when the motor 20 drives the force detecting device 3 to move away from or towards the structural member 6 to be measured, the power transmission rod 31 is driven to load or unload a pulling force on the structural member 6 to be measured, and the force transmission rod 31 transmits the pulling force to the force sensor 30 through the force application detecting end.
Preferably, as shown in fig. 3, a force arm structure 5 is arranged at the top of the structural member to be tested 6, and the force arm structure 5 is parallel to the force transmission rod 31, the force sensor 30 and the connecting shaft 21; the two ends of the force arm structure are used for being correspondingly connected with the two ends of the force transmission rod 31 at the same side, so that the pulling force or the torsion force is loaded or unloaded to the structural part 6 to be tested in the process that the motor driving force detection device moves towards or away from the structural part 6 to be tested.
Preferably, the two ends of the force arm structure 5 connected with the force transmission rod 31 are flush with each other; the height of the force arm structure 5 is flush with the force transmission rod 31; the direction of the pulling force received at both ends of the moment arm structure 5 is thus perpendicular to the force sensor 30.
According to the preferred embodiment, the tension data obtained by detection does not bring calculation errors due to angle inclination, and is closer to real data.
In the above embodiment:
the force arm structure 5 and the force transfer rod 31 are directly and correspondingly connected at the same level of the two flush ends and used for testing the tensile strength of the structural part 6 to be tested.
Thereby, through set up arm of force structure 5 on the structure that awaits measuring, fix the structure 6 that awaits measuring on mount pad 10, adopt wire rope to correspond the both ends of arm of force structure 5 and the both ends of power transmission rod 31 and be connected, control motor just reverse, the in-process of the movement of motor 20 drive power detection device 3 orientation or keeping away from the structure 6 that awaits measuring, force transducer 30 takes power transmission rod 31 to the loading or the uninstallation pulling force of structure 6 that awaits measuring, thereby tensile test data can be gathered, and displacement detection device gathers displacement test data in the process, finally can obtain the relation curve of pulling force and displacement, judge whether structure tensile strength can reach the design requirement.
Or:
one end of the force arm structure 5 is connected with one end of the force transmission rod 31 on the same side, and the other end of the force arm structure 5 faces the direction far away from the force detection device 3 and winds around the other force application detection end connected to the force transmission rod 31 through a steering mechanism 4, so that the stress directions of the two ends of the force arm structure 5 are consistent, and the force application detection end is used for testing the torsional strength of the structural part 6 to be tested.
In this embodiment, the moment arm structure 5 is additionally installed at the top of the structural member, one end of the moment arm structure 5 is directly connected with one end of the force transmission rod 31, and the other end of the moment arm structure is connected with the other end of the force transmission rod 31 after being turned, so that in the process that the motor 20 drives the force detection device 3 to move towards or away from the structural member 6 to be tested, the stress directions at the two ends of the moment arm structure 5 are uniform, the force transmission rod 31 is used for loading or unloading torsion force on or from the structural member 6 to be tested, the torsion force is transmitted to the force sensor 30 by the force transmission rod 31, tensile test data can be collected, displacement test data are collected by the displacement detection device in the process, a relation curve between the torsion force and the displacement is finally obtained, and whether the torsional strength of. The moment arm structure 5 and the structural member to be tested 6 are integrally connected, specifically, the connection can be realized by fastening bolts or welding. Preferably, the steering mechanism 4 is a fixed pulley. Therefore, the stress directions of the two ends of the force arm structure 6 are consistent through the steering fixed pulley, and the torsion resistance is convenient to test. Specifically, the fixed pulley is installed on the base 1 along a horizontal direction through a fixed frame 12, and the fixed frame 12 is arranged on one side of the installation seat 10 far away from the support frame 11.
In addition, in tensile or anti-torsion test, the both ends through arm of force structure 5 transmit drive mechanism 2 to the pulling force or the torsion that the structure 6 that awaits measuring applyed, and the both ends of arm of force structure 5 receive the equal power transmission of size, direction and give the structure that awaits measuring, can simulate the atress condition of the structure that awaits measuring under the circumstances such as gale, gust, be particularly useful for to having certain size's structure to make the data of test more accurate.
In practical application, two ends of the force arm structure are connected with two ends of the force transmission rod 31 through steel wire ropes respectively, and the force arm structure is used for testing the tensile strength or torsional strength of the structural part 6 to be tested. In addition, in order to prevent the wire rope from deviating on the force arm structure 5 and the force transmission rod 31 and affecting the stability of the force detection device 3 moving towards or away from the structural member to be detected 6, the wire rope is flush and horizontally arranged at two ends of the force arm structure 5 and the force transmission rod 31 along the same side.
Example 3
In addition to embodiment 1 or embodiment 2, the displacement detecting means 4 is configured as a displacement sensor, the telescopic end of the displacement sensor (not shown) is disposed on the force detecting means 3 (specifically, on the force transmission rod 31), and the other housing end is mounted on the support frame 11.
Preferably, the test equipment further comprises a control cabinet, and the mechanical sensor, the displacement sensor and the motor are electrically connected with the control cabinet. Preferably, the motor is provided with limit switches at the maximum and minimum rotating angles, and the limit switches are electrically connected with the control cabinet. In practical application, the type of the limit switch is LSM-11/RLA. The mechanical sensor adopts a commercial 10T force sensor. The displacement sensor type adopts a Milan KPC series linear displacement sensor.
Example 4
The tensile strength can be tested by using the testing equipment of the invention by adopting the following steps:
s1, mounting the structural part 6 to be tested on the mounting seat 10 of the test equipment; wherein, a force arm structure 5 is designed at the top end of the structural part 6 to be tested;
s2, adopting a steel wire rope to correspondingly connect the two ends of the force arm structure 5 with the same sides of the two ends of the force transmission rod 31 respectively;
s3, controlling the motor to rotate forward and backward, and driving the power detection device 3 to move away from or towards the structural part 6 to be tested by the transmission mechanism 2, so as to realize the process of loading or unloading tension on the structural part 6 to be tested; meanwhile, the force detection device 3 and the displacement detection device collect the test data of the tension and the displacement, and finally a relation curve of the tension and the displacement is obtained for judging whether the tensile strength of the structural member can meet the design requirements.
Specifically, the tensile test results for the pillars are shown in fig. 5. When the slope of the curve changes, the tensile force corresponding to the point is judged to be a limit value, and the limit value is used for judging whether the tensile strength of the structural part can meet the design requirement.
The torsion strength can be tested by the testing equipment of the invention by adopting the following steps:
s1, mounting the structural part 6 to be tested on the mounting seat 10 of the test equipment; wherein, a force arm structure 5 is designed at the top end of the structural part 6 to be tested;
s2, one end of the force arm structure 5 is connected with one end, which is positioned on the same side, of the force transfer rod 31 through a steel wire rope, the other end of the force arm structure 5 faces the direction far away from the force detection device 3, and is connected to the other end of the force transfer rod 31 after being wound through a steering mechanism 4, and the stress directions of the two ends of the force arm structure 5 are consistent;
s3, controlling the motor to rotate forward and backward, driving the transmission mechanism 2 to drive the power detection device 3 to move away from or towards the structural part 6 to be tested, realizing the process of loading or unloading torsion on the structural part 6 to be tested, and simultaneously acquiring test data of the torsion and displacement through the power detection device 3 and the displacement detection device, and finally obtaining a relation curve of the torsion and the displacement for judging whether the torsional strength of the structural part can meet the design requirements.
Specifically, the torsion resistance test result of the test method on the main beam single-side hoop is shown in fig. 6. When the slope of the curve changes, the torsion corresponding to the point is judged to be a limit value, and the limit value is used for judging whether the torsional strength of the structural part can meet the design requirement.
In the above embodiment, the base 1, the mounting seat 10, the supporting frame 11 and the fixing frame 12 may be detachably mounted to each other, or may be integrally disposed to form a whole.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a photovoltaic tracking system support mechanics test equipment which characterized in that:
the device comprises a base, wherein a mounting seat for mounting a structural part to be tested is arranged on the base;
the base is further provided with a support frame on one side of the mounting seat, the support frame is provided with a force detection device and a transmission mechanism, and the force detection device is used for connecting a structural part to be detected so as to detect the tensile force or the torsion applied to the structural part to be detected; the output end of the transmission mechanism is connected with the force detection device into a whole and is used for driving the force detection device to move relative to the structural part to be detected;
the force detection device is also connected with a displacement detection device, and the displacement detection device is used for detecting the movement distance change of the force detection device relative to the structural part to be detected;
therefore, the force detection device is driven to move relative to the structural part to be tested through the driving action of the transmission mechanism, so that the tensile force or the torsion force applied to the structural part to be tested is changed, and the simulation of the tensile and/or torsion resistant test working condition of the structural part to be tested is realized.
2. The photovoltaic tracking system mount mechanics testing apparatus of claim 1, wherein:
the transmission mechanism comprises a worm and gear transmission unit and a motor which are arranged on the support frame;
the worm and gear transmission unit comprises a first worm and gear transmission unit and a second worm and gear transmission unit; the first worm gear and worm transmission unit comprises a first worm gear and a first worm which are meshed, and the second worm gear and worm transmission unit comprises a second worm gear and a second worm which are meshed; the output end of the motor is in driving connection with the input end of the first worm, and the output end of the first worm is in driving connection with the input end of the second worm through a connecting shaft; output shafts are arranged in the first worm wheel and the second worm wheel respectively, screw sections with external threads are arranged on the output shafts, external threads of the screw sections are in threaded fit with internal threads of the first worm wheel and the second worm wheel, and the output shafts of the first worm wheel and the second worm wheel are rotatably embedded in the support frame at one side of the screw sections respectively and are connected with the force detection device;
therefore, the motor drives the first worm to rotate and then drives the first worm wheel, the adjacent second worm and the second worm wheel to synchronously rotate, and the first worm wheel and the second worm wheel drive the power detection device to move towards or away from the structural part to be detected while rotating along the screw thread of the screw rod section on the output shaft.
3. The photovoltaic tracking system mount mechanics testing apparatus of claim 2, wherein:
the force detection device comprises a force transmission rod and a force sensor, wherein the force transmission rod is used for connecting a structural part to be detected; the force sensors are respectively arranged at two ends of the force transmission rod, 1 force sensor is arranged at each end, the number of the force sensors is 2, and the force sensors at the two ends respectively form force application detection ends;
output shafts in the first worm wheel and the second worm wheel are in one-to-one correspondence and integrated connection with the force sensors at two ends on one side of the screw rod section;
two force application detection ends on the 2 force sensors are respectively sleeved at two ends of the force transmission rod and used for detecting the tensile force or the torsion applied to the structural part to be detected.
4. The photovoltaic tracking system mount mechanics testing apparatus of claim 3, wherein:
the top of the structural part to be tested is provided with a force arm structure, and the force arm structure, the force transmission rod and the force sensor are parallel to each other;
the two ends of the force arm structure are used for being correspondingly connected with the two ends of the force transmission rod at the same side, so that tension or torsion, unloading tension or torsion is loaded on the structural part to be tested in the process that the motor driving force detection device moves away from or towards the structural part to be tested.
5. The photovoltaic tracking system mount mechanics testing apparatus of claim 4, wherein:
the two ends of the force arm structure connected with the force transmission rod are correspondingly flush at the same side;
the height of the force arm structure is flush with the force transmission rod;
therefore, the direction of the pulling force applied to the two ends of the force arm structure is perpendicular to the force transmission rod and the force sensor.
6. The photovoltaic tracking system mount mechanics testing apparatus of claim 5, wherein:
the force arm structure is directly and correspondingly connected with the same side of the two flush ends of the force transmission rod and is used for testing the tensile strength of the structural part to be tested; or,
one end of the force arm structure is connected with one end of the force transmission rod, which is positioned at the same side, and the other end of the force arm structure faces the direction away from the force detection device and winds around the other force application detection end connected to the force transmission rod through a steering mechanism, so that the stress directions of the two ends of the force arm structure are consistent, and the force arm structure is used for testing the torsional strength of a structural part to be tested.
7. The photovoltaic tracking system mount mechanics testing apparatus of claim 6, wherein:
the steering mechanism is provided with a fixed pulley;
the fixed pulley is installed on the base along the horizontal direction through a fixed frame, and the fixed frame is arranged on one side, far away from the supporting frame, of the installation seat.
8. The photovoltaic tracking system mount mechanics testing apparatus of claim 3, wherein:
the displacement detection device comprises a displacement sensor, the telescopic tail end of the displacement sensor is arranged on the force transmission rod, and the other shell end is arranged on the support frame.
9. The photovoltaic tracking system mount mechanics testing apparatus of claim 8, wherein:
the test equipment also comprises a control cabinet, wherein the mechanical sensor, the displacement sensor and the motor are electrically connected with the control cabinet;
the motor is provided with limit switches at the maximum and minimum rotation angle positions of positive and negative rotation, and the limit switches are connected with the controller cabinet.
10. A photovoltaic tracking system support mechanical testing method, which utilizes the photovoltaic tracking system support mechanical testing device of any one of claims 1 to 9, and is characterized in that:
the tensile strength was tested by the following procedure:
s1, mounting the structural part to be tested on a mounting seat of the test equipment; wherein, a force arm structure is designed at the top end of the structural part to be tested;
s2, correspondingly connecting two ends of the force arm structure with the same sides of the two ends of the force detection device respectively;
s3, controlling the motor to rotate forward and backward, and driving the power detection device to move away from or towards the structural part to be tested by the transmission mechanism to realize the process of loading or unloading tension on the structural part to be tested; meanwhile, test data of tension and displacement are collected through a force detection device and a displacement detection device, and finally a relation curve of tension and displacement is obtained for judging whether the tensile strength of the structural member can meet the design requirement;
alternatively, the torsional strength is tested by the following steps:
s1, mounting the structural part to be tested on a mounting seat of the test equipment; wherein, a force arm structure is designed at the top end of the structural part to be tested;
s2, connecting one end of the force arm structure with one end of the force detection device on the same side, and connecting the other end of the force arm structure to the other end of the force detection device after winding through a steering mechanism in a direction away from the force detection device, so as to realize the consistency of the stress directions of the two ends of the force arm structure;
s3, controlling the motor to rotate forward and backward, driving the power detection device to move away from or towards the structural part to be tested by the transmission mechanism, realizing the process of loading or unloading torsion on the structural part to be tested, simultaneously acquiring test data of the torsion and displacement through the power detection device and the displacement detection device, and finally obtaining a relation curve of the torsion and the displacement, wherein the relation curve is used for judging whether the torsion strength of the structural part can meet the design requirement.
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| CN201911412295.2A CN110987628A (en) | 2019-12-31 | 2019-12-31 | Photovoltaic tracking system support mechanical testing device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487122A (en) * | 2020-05-27 | 2020-08-04 | 广东科艺新泰建筑科技开发有限公司 | Tensile detection device for outdoor article bearing structure |
| CN113390724A (en) * | 2021-06-08 | 2021-09-14 | 阳光新能源开发有限公司 | Testing device of tripod for photovoltaic support |
| CN113504117A (en) * | 2021-07-14 | 2021-10-15 | 邢台医学高等专科学校 | Sports ground surface layer material testing device |
| CN117250105A (en) * | 2023-07-10 | 2023-12-19 | 安徽晶智新能源有限公司 | Solar photovoltaic module sampling test device |
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- 2019-12-31 CN CN201911412295.2A patent/CN110987628A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487122A (en) * | 2020-05-27 | 2020-08-04 | 广东科艺新泰建筑科技开发有限公司 | Tensile detection device for outdoor article bearing structure |
| CN111487122B (en) * | 2020-05-27 | 2023-04-14 | 广东科艺新泰建筑科技开发有限公司 | Tensile detection device for outdoor article bearing structure |
| CN113390724A (en) * | 2021-06-08 | 2021-09-14 | 阳光新能源开发有限公司 | Testing device of tripod for photovoltaic support |
| CN113504117A (en) * | 2021-07-14 | 2021-10-15 | 邢台医学高等专科学校 | Sports ground surface layer material testing device |
| CN117250105A (en) * | 2023-07-10 | 2023-12-19 | 安徽晶智新能源有限公司 | Solar photovoltaic module sampling test device |
| CN117250105B (en) * | 2023-07-10 | 2024-04-16 | 安徽晶智新能源有限公司 | Solar photovoltaic module sampling test device |
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