Horizontal loading test device and method for elastic support of pull rod

Abstract

The horizontal loading test device for the elastic support of the tie rod includes an axial loading platform capable of applying an axial load, a fixed platform arranged opposite to the axial loading platform, and a V-shaped bracket arranged between the axial loading platform and the fixed platform. The elastic support of the tie rod is horizontally supported on the V-shaped bracket, and is characterized in that it also includes a pressure-bearing component coaxially connected to the elastic support of the tie rod and a support plate coaxially fixed to the support seat of the elastic support of the tie rod and in contact with the fixed platform. The pressure-bearing component is in linear contact with the axial loading platform, forming a deflection angle between the pressure-bearing component and the axial loading platform. The pressure-bearing component pushes the elastic support of the tie rod to rotate around the spherical surface of the support seat as the axial loading platform is loaded, thereby forming axial compression and deflection. The deflection angle decreases as the elastic support of the tie rod is deflected. The present invention realizes the composite deformation of the axial and deflection of the elastic support of the tie rod through unidirectional loading, and has a simple structure. The present invention also provides a loading test method for the elastic support of the tie rod.

Description

Technical Field

[0001] The invention relates to a horizontal loading test device and method for a pull rod elastic support, which are used for a fatigue loading test of the pull rod elastic support. Background Art

[0002] With the rapid development of offshore wind power, offshore wind turbines are also moving from nearshore to deep sea. Since traditional fixed wind turbines have disadvantages such as high cost and unstable structure in deep sea environment, deep sea floating wind turbines have been born. They can operate stably in deep sea environment and can use the rich wind resources in deep sea area to convert wind energy into electrical energy. At present, there are new floating wind turbine models that adopt Y-type double wind rotor structure. The two main units of the model and the two main units and the lower floating foundation need to be fixedly connected by cables. During the operation of the wind turbine, the cable needs to withstand alternating axial loads and changes in deflection angle caused by the weight of the impeller and torque changes. The service life of the cable device is greatly reduced due to factors such as vibration. The elastic support of the tie rod can reduce the vibration of the cable under various loads through structural design and the use of vibration-reducing materials and other vibration reduction measures, which greatly improves the stability and reliability of the wind turbine. Therefore, the elastic support of the tie rod for offshore wind turbines is indispensable. Figure 9 As shown, the elastic support of the pull rod includes a support seat 301, an intermediate plate 302, an upper rubber part 303, a lower rubber part 304, a self-prestressing bolt 305, a cover plate 306, a support plate fixing bolt 307, etc. The upper and lower rubber parts and their supporting mating surfaces are all spherical. The pull rod is pressed against the intermediate plate through the pull rod nut. The self-prestressing bolt enables the upper and lower rubber springs to obtain a certain initial pre-compression amount, thereby increasing their fatigue life. The elastic deformation of the upper and lower rubber springs buffers the vibration and swing energy of the pull rod, thereby extending the service life of the pull rod. Patent document CN201810456246.8, titled "A Spherical Elastomer Large-tonnage Axial and Deflection Test Device and Method," discloses a large-tonnage axial and deflection test device and method for spherical elastomers. The device applies an axial preload through a vertical cylinder and a deflection angle through a compression-rotation cylinder to perform a large-tonnage axial and deflection fatigue performance test on the spherical elastomer. However, this solution loads the spherical elastomer vertically, which is inconsistent with the actual installation posture of the product. The axial load and deflection angle are applied using different cylinders, resulting in a complex structure. Current testing equipment for elastic support of tie rods has the following problems:

[0003] 1. The simple structure can only perform uniaxial loading, but the elastic support of the tie rod needs to bear axial load and deflection angle at the same time. The test equipment for multi-axis loading is complex in structure, and the test posture does not match the product installation posture. Therefore, the current test equipment cannot meet the test requirements of the elastic support of the tie rod.

[0004] 2. When conducting deflection fatigue tests on conventional fatigue testing machines, the elastic support of the pull rod is subjected to uneven radial force, which is prone to rotation and will cause the overall slippage and misalignment of the test device.

[0005] 3. The axial load provided by the fatigue testing machine acts on the elastic support of the pull rod, which poses a risk of axial extrusion of the V-shaped bracket. Summary of the Invention

[0006] The horizontal loading test device and method for the elastic support of the pull rod provided by the present invention realize the composite deformation of the axial and deflection of the elastic support of the pull rod through unidirectional loading. The structure is simple, and the fatigue working condition of the elastic support of the pull rod under simultaneous axial load and deflection angle is simulated, thereby improving the structural stability of the test device during the loading process, avoiding the axial ejection of the V-shaped bracket, and improving the stability and reliability of the centering support of the elastic support of the pull rod.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The horizontal loading test device of the elastic support of the pull rod includes an axial loading platform that can apply axial load, a fixed platform arranged opposite to the axial loading platform, and a V-shaped bracket arranged between the axial loading platform and the fixed platform. The elastic support of the pull rod is horizontally supported on the V-shaped bracket, and is characterized in that it also includes a pressure-bearing component coaxially connected to the elastic support of the pull rod and a support plate coaxially fixed to the support seat of the elastic support of the pull rod and in contact with the fixed platform surface. The pressure-bearing component is in linear contact with the axial loading platform, and a deflection angle is formed between the pressure-bearing component and the axial loading platform. The pressure-bearing component pushes the elastic support of the pull rod to rotate around the spherical surface of the support seat as the axial loading platform is loaded, forming axial compression and deflection. The deflection angle decreases as the elastic support of the pull rod is deflected.

[0009] Preferably, the pressure-bearing assembly includes a pressure-bearing cylinder coaxially connected to the elastic support of the pull rod and an inclined loading plate in linear contact with the axial loading platform. The pressure-bearing cylinder is fixed in the elastic support of the pull rod by one end of the fixed platform, and is fixed to the inclined loading plate by one end of the axial loading platform. The side of the inclined loading plate in linear contact with the axial loading platform is an inclined surface that is not radially parallel to the elastic support of the pull rod, and a deflection angle is formed between the inclined surface and the axial loading platform. The outer diameter of the pressure-bearing cylinder is smaller than the inner diameter of the cover plate of the elastic support of the pull rod, forming a reserved space between the pressure-bearing cylinder and the cover plate.

[0010] Preferably, the pressure-bearing cylinder has an external thread section and an annular step surface at one end close to the fixed platform. The pressure-bearing cylinder extends into the middle plate elastically supported by the pull rod, the annular step surface abuts against the end face of the middle plate, the external thread section extends from the middle plate and a locking nut is assembled on it, the middle plate is clamped between the locking nut and the annular step surface, and the locking nut is axially separated from the support plate and does not contact.

[0011] Preferably, a positioning circular groove is provided on one side of the slope loading plate fixed to the pressure-bearing cylinder to form radial positioning for the pressure-bearing cylinder, one end of the pressure-bearing cylinder is positioned in the positioning circular groove, a countersunk hole is provided in the axial direction on the slope loading plate, and a connecting hole corresponding to the countersunk hole is provided at one end of the pressure-bearing cylinder, and a bolt is inserted into the countersunk hole and fastened to the connecting hole to fix the pressure-bearing cylinder and the slope loading plate.

[0012] Preferably, a pressure-bearing protection plate is fixed on the end face of the axial loading platform and is in line contact with the slope loading plate. A deflection angle is formed between the slope loading plate and the pressure-bearing protection plate. The top surface of the slope loading plate is located outside the pressure cylinder. The edge of the top surface of the slope loading plate is in line contact with the pressure-bearing protection plate, and the distance between the contact line and the center of the spherical surface of the support seat is equal to the radius of the spherical surface of the support seat.

[0013] Preferably, the support plate is radially positioned and matched with a convex ring on the end surface of the support seat, the convex ring extends into the support plate, and the height of the convex ring is less than the thickness of the support plate.

[0014] Preferably, a stop seat is fixed on the V-shaped bracket, and the stop seat is symmetrically arranged on the left and right of the V-shaped bracket. The stop seat is connected to the cover plate elastically supported by the pull rod through a stop plate. A waist-shaped hole is opened at one end of the stop plate, and a round hole is opened at the other end. The stop seat is connected to the waist-shaped hole through a bolt, and a threaded sleeve is fitted on the self-prestressed screw of the cover plate, and the threaded sleeve passes through the round hole and is connected to the stop plate.

[0015] Preferably, the V-shaped bracket is welded from a square steel pipe, the V-shaped bracket is close to the fixed platform, and the V-shaped bracket is provided with a stop plate and a contact plate for limiting the movement of the V-shaped bracket. The stop plate and the contact plate are symmetrically arranged on the left and right of the V-shaped bracket, and the pull rod is elastically supported on the contact plate.

[0016] The loading test method of the elastic support of the tie rod adopts the loading test device of the elastic support of the tie rod described above for loading, and is characterized in that: according to the deflection angle in the actual application condition of the elastic support of the tie rod, the angle of the deflection angle between the pressure-bearing component and the axial loading platform is adjusted before loading, and the maximum loading load of the axial loading platform is adjusted according to the angle of the deflection angle during loading, so that the deflection angle between the pressure-bearing component and the axial loading platform can be reduced to zero after loading.

[0017] Preferably, the slope loading plate with sloped surfaces of different angles is replaced to adjust the deflection angle between the pressure-bearing component and the axial loading platform before loading.

[0018] The beneficial effects of the invention are:

[0019] The horizontal loading test device of the pull rod elastic support of the present invention is that the pull rod elastic support is horizontally supported on a V-shaped bracket, the pressure-bearing component is coaxially connected to the pull rod elastic support and is in line contact with the axial loading platform, and a deflection angle is formed between the pressure-bearing component and the axial loading platform, and the support seat of the pull rod elastic support is in contact with the fixed table through the support plate. When the axial loading component transmits the axial load to the pressure-bearing component, the pressure-bearing component will push the pull rod elastic support to rotate around the spherical surface of the support seat, forming axial compression and deflection, and the pressure-bearing component and the axial loading platform are designed to be in line contact with a deflection angle, and the pull rod elastic support is pushed to form deflection during axial compression through unidirectional loading of the axial loading platform, and the axial and deflection composite deformation of the pull rod elastic support is achieved through unidirectional loading. The structure is simple and the deflection angle required for the test can be easily adjusted. On the basis of the consistency between the test posture of the product and the actual installation posture, it is ensured that the product can form multi-directional composite deformation during the test, and the fatigue condition of the pull rod elastic support under the axial load and deflection angle is simulated, thereby improving the operability of the test and the reliability of the test data, and providing reliable data support for product improvement.

[0020] The connection between the anti-rotation plate and the threaded sleeve forms a connection between the anti-rotation plate and the elastic support of the pull rod. The connection between the anti-rotation plate and the anti-rotation seat forms a connection between the anti-rotation plate and the V-shaped bracket. The connection between the anti-rotation seat and the anti-rotation plate positions the elastic support of the pull rod circumferentially on the V-shaped bracket, preventing the elastic support of the pull rod from rotating on the V-shaped bracket during loading, so that the elastic support of the pull rod will not rotate during the test loading process, ensuring the reliability of the V-shaped bracket's central support for the elastic support of the pull rod, and improving the structural stability of the test device during loading.

[0021] When the V-shaped bracket moves toward the side of the axial loading platform, the self-prestressed bolt on the support seat hits the stop plate, limiting the V-shaped bracket from continuing to move toward the side of the axial loading platform. When the V-shaped bracket moves toward the side of the fixed platform, the fixed platform will limit its continued movement, avoiding the axial movement of the V-shaped bracket and improving the stability and reliability of the elastic support of the tie rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the horizontal loading test device of the elastic support of the pull rod of the present invention in the unloaded state.

[0023] Figure 2 Schematic diagram of the horizontal loading test device with elastic support of the pull rod under loading state.

[0024] Figure 3 Schematic diagram of the exploded view of the horizontal loading test device with elastic support of the tie rod.

[0025] Figure 4 Schematic diagram of the pressure cylinder.

[0026] Figure 5Schematic diagram of the inclined loading plate.

[0027] Figure 6 Schematic diagram of the elastic support of the pull rod on the V-shaped bracket.

[0028] Figure 7 Schematic diagram of the anti-rotation plate.

[0029] Figure 8 Schematic diagram of a V-shaped bracket.

[0030] Figure 9 Schematic diagram of the elastic support of the pull rod in the prior art. DETAILED DESCRIPTION

[0031] The following combination Figures 1 to 8 The embodiments of the present invention are described in detail.

[0032] A horizontal loading test device for a tie rod elastic support comprises an axial loading platform 2 capable of applying an axial load, a fixed platform 3 arranged opposite to the axial loading platform 2, and a V-shaped bracket 1 arranged between the axial loading platform 2 and the fixed platform 3. The tie rod elastic support 300 is horizontally supported on the V-shaped bracket 1, and is characterized in that it also comprises a pressure-bearing component 4 coaxially connected to the tie rod elastic support 300 and a support plate 5 coaxially fixed to the support seat 301 of the tie rod elastic support 300 and in surface contact with the fixed platform 3. The pressure-bearing component 4 is in line contact with the axial loading platform 2, and a deflection angle α is formed between the pressure-bearing component 4 and the axial loading platform 2. The pressure-bearing component 4 pushes the tie rod elastic support 300 to rotate around the spherical surface of the support seat 301 as the axial loading platform 2 is loaded, thereby forming axial compression and deflection. The deflection angle α decreases as the tie rod elastic support 300 deflects.

[0033] In the horizontal loading test device for the elastic support of the tie rod described above, the elastic support 300 of the tie rod is horizontally supported on the V-shaped bracket 1, the pressure-bearing component 4 is coaxially connected to the elastic support 300 of the tie rod and is in line contact with the axial loading platform 2, and a deflection angle α is formed between the pressure-bearing component 4 and the axial loading platform 2. The support seat 301 of the elastic support 300 is in surface contact with the fixed platform 3 through the support plate 5. When the axial loading component 2 transmits the axial load to the pressure-bearing component 4, the pressure-bearing component 4 will push the elastic support 300 to rotate around the spherical surface of the support seat 301, forming axial compression and deflection, setting the pressure-bearing component and the axial loading platform 2 in a straight line. It is designed as a line contact with a deflection angle. The unidirectional loading of the axial loading platform 2 pushes the pull rod elastic support 300 to form a deflection during axial compression. The unidirectional loading realizes the composite deformation of the axial and deflection of the pull rod elastic support 300. The structure is simple and easy to adjust the deflection angle required for the test. On the basis of the consistency between the test posture of the product and the actual installation posture, it ensures that the product can form multi-directional composite deformation during the test, and simulates the fatigue condition of the pull rod elastic support under the axial load and deflection angle at the same time, thereby improving the operability of the test and the reliability of the test data, and providing reliable data support for product improvement.

[0034] Among them, the pressure-bearing component 4 includes a pressure-bearing cylinder 41 coaxially connected to the pull rod elastic support 300 and an inclined loading plate 42 in line contact with the axial loading platform 2. The pressure-bearing cylinder 41 is fixed in the pull rod elastic support 300 by one end of the fixed platform 3, and is fixed to the inclined loading plate 42 by one end of the axial loading platform 2. The side of the inclined loading plate 42 in line contact with the axial loading platform 2 is an inclined surface 421 that is radially non-parallel to the pull rod elastic support 300. A deflection angle α is formed between the inclined surface 421 and the axial loading platform. The outer diameter of the pressure-bearing cylinder 41 is smaller than the inner diameter of the cover plate 306 of the pull rod elastic support 300, forming a reserved space between the pressure-bearing cylinder 41 and the cover plate 306. As can be seen from the accompanying drawings, the pressure-bearing cylinder 41 is coaxially fixed to the pull rod elastic support 300 at one end of the fixed platform 3, the support seat 301 is in surface contact with the fixed platform 3 through the support plate 5, and the pressure-bearing cylinder 41 is fixed to the slope loading plate 42 at one end of the axial loading platform 2. The inclined surface 421 is an inclined surface, and the opposite surface of the axial loading platform 2 and the inclined surface 421 is a vertical surface arranged along the radial direction of the pull rod elastic support 300. A line contact is formed between the top edge of the inclined surface 42 and the axial loading platform 2, and a deflection angle is formed between the inclined loading plate 42 and the axial loading platform 2. α, when the axial loading platform 2 applies axial pressure, the pressure cylinder 41 will push the slope loading plate 42 to move axially. Since the support plate 5 is in surface contact with the fixed platform 3, the movement of the support seat 301 is restricted, and a reserved space is formed between the pressure cylinder 41 and the cover plate 306, so that the elastic support 300 of the pull rod will deflect around the spherical surface of the support seat 301 during axial compression. The elastic support 300 of the pull rod simultaneously forms a composite deformation of axial compression and deflection angle. When the deflection angle α is reduced to zero, the slope loading plate 42 forms surface contact with the axial loading platform 2.

[0035] The pressure-bearing cylinder 41 has an externally threaded section 411 and an annular step surface 412 at one end near the fixed platform 3. The pressure-bearing cylinder 41 extends into the intermediate plate 302 of the pull rod elastic support 300, with the annular step surface 412 abutting against the end face of the intermediate plate 302. The externally threaded section 411 extends from the intermediate plate 302 and is fitted with a locking nut 43. The intermediate plate 302 is clamped between the locking nut 43 and the annular step surface 412, and the locking nut 43 is axially separated from the support plate 5 and does not contact the intermediate plate 5. The pressure-bearing cylinder 41 is coaxially fixed to the intermediate plate 302 through the cooperation of the externally threaded section 411, the annular step surface 412, and the locking nut 43. This simple structure allows for easy connection and operation. Furthermore, the locking nut 43 is axially separated from the support plate 5 and does not interfere with the axial movement of the pressure-bearing cylinder 411. The pressure-bearing cylinder 411 has axial and deflection space between the axial loading platform 2 and the fixed platform 3, ensuring that no interference occurs during loading.

[0036] The surface of the slope loading plate 42 fixed to the pressure-bearing cylinder 41 has a positioning circular groove 422 for radially positioning the pressure-bearing cylinder 41. One end of the pressure-bearing cylinder 41 is positioned in the positioning circular groove 422. The slope loading plate 42 has a countersunk hole 423 arranged axially. One end of the pressure-bearing cylinder 41 has a connecting hole corresponding to the countersunk hole 423. Bolts are inserted into the countersunk hole 423 and tightened with the connecting hole to secure the pressure-bearing cylinder 41 to the slope loading plate 42. The positioning circular groove 422 radially positions the pressure-bearing cylinder 41, facilitating the rapid positioning and assembly of the pressure-bearing cylinder 41 and the slope loading plate 42. It also bears a portion of the radial force, reducing the force on the bolts connecting the slope loading plate 42 and the pressure-bearing cylinder 41, thereby improving structural reliability.

[0037] Among them, a pressure-bearing protection plate 21 is fixed on the end face of the axial loading platform 2, which is in line contact with the slope loading plate 42. A deflection angle α is formed between the slope loading plate 42 and the pressure-bearing protection plate 41. The top surface of the slope loading plate 42 is located on the outside of the pressure cylinder 41. The edge of the top surface of the slope loading plate 42 is in line contact with the pressure-bearing protection plate 21, and the distance between the contact line and the center of the spherical surface of the support seat 301 is equal to the radius of the spherical surface of the support seat. The pressure-bearing protection plate 21 is used to protect the axial loading platform 2. The contact line between the inclined loading plate 42 and the pressure-bearing protection plate 21 is located on the outside of the pressure-bearing plate 41, which is more conducive to the deflection of the elastic support 300 of the pull rod during loading, and avoids the situation where the contact line is self-locked and cannot rotate within the diameter range of the pressure-bearing cylinder 41. The distance between the contact line and the center of the spherical surface of the support seat 301 is equal to the radius of the spherical surface of the support seat 301, which means that the contact line between the inclined loading plate 5 and the pressure-bearing protection plate 21 and the spherical surface of the support seat 301 are respectively located on the spherical surface with the same center, so that the contact line between the inclined loading plate 42 and the pressure-bearing protection plate 21 will not move during the deflection process, as shown in the attached figure. Figures 1 and 2The distance L from the contact line between the medium-slope loading plate 42 and the pressure-bearing protection plate 21 to the top of the pressure-bearing protection plate 21 remains unchanged during the deflection of the pull rod elastic support 300, that is, the position of the line contact between the slope loading plate 42 and the pressure-bearing protection plate 21 does not change with the deflection of the pull rod elastic support 300.

[0038] The support plate 5 is radially aligned with the raised ring A on the end surface of the support seat 301. The raised ring A extends into the support plate 5, and its height is less than the thickness of the support plate 5. This raised ring A allows the support plate 5 to quickly form a radially aligned fit with the end surface of the support seat 301, which can then be secured to the support seat 301 with bolts, improving the ease and operability of the test device assembly. The lower height of the raised ring A prevents contact between the raised ring A and the mounting platform 200, preventing damage to the raised ring A during testing.

[0039] Among them, the anti-rotation seat 6 is fixed on the V-shaped bracket 1, and the anti-rotation seat 6 is symmetrically arranged on the left and right of the V-shaped bracket 1. The anti-rotation seat 6 is connected to the cover plate 306 of the pull rod elastic support 300 through the anti-rotation plate 7. The anti-rotation plate 7 has a waist-shaped hole 71 at one end and a circular hole 72 at the other end. The anti-rotation seat 6 is connected to the waist-shaped hole 71 through a bolt. The self-prestressed screw of the cover plate 306 is threadedly fitted with a threaded sleeve 8, and the threaded sleeve 8 passes through the circular hole 72 and is connected to the anti-rotation plate 7. The anti-rotation plate 7 is connected to the threaded sleeve 8 to form a connection between the anti-rotation plate 7 and the elastic support 300 of the pull rod. The connection between the anti-rotation plate 7 and the anti-rotation seat 6 forms a connection between the anti-rotation plate 7 and the V-shaped bracket 1. The connection between the anti-rotation seat 6 and the anti-rotation plate 7 positions the elastic support 300 of the pull rod circumferentially on the V-shaped bracket 1, preventing the elastic support 300 of the pull rod from rotating on the V-shaped bracket 1 during loading, so that the elastic support of the pull rod will not rotate during the test loading process, ensuring the reliability of the V-shaped bracket's centering support for the elastic support of the pull rod, and improving the structural stability of the test device during loading. The waist-shaped hole 71 can adapt to the dimensional error between the V-shaped bracket 1 and the elastic support of the pull rod, facilitating the installation of the anti-rotation plate 7. The threaded sleeve plays a role in protecting the self-prestressed screw on the support seat 301, avoiding deformation and damage of the self-prestressed bolt during the loading test, facilitating the quick connection or disassembly of the anti-rotation plate 7 and the elastic support 300 of the pull rod, and improving the assembly convenience of the test device.

[0040] The V-shaped bracket 1 is welded from a square steel tube. The V-shaped bracket 1 is close to the fixed platform 3. The V-shaped bracket 1 has a stop plate 1 and a contact plate 12 to limit the movement of the V-shaped bracket. The stop plate 11 and the contact plate 12 are respectively arranged symmetrically on the V-shaped bracket 1, and the elastic support 300 of the pull rod is placed on the contact plate 12. Because the elastic support 300 of the pull rod is subjected to the axial load transmitted by the axial loading platform, the V-shaped bracket 1 may move axially, affecting the support for the elastic support 300 of the pull rod. When the V-shaped bracket 1 moves toward the axial loading platform 2, the self-prestressed bolt 305 on the support seat 301 hits the stop plate 11, limiting the V-shaped bracket 1 from moving further toward the axial loading platform 2. When the V-shaped bracket moves toward the fixed platform, the fixed platform will limit its further movement due to the proximity of the V-shaped bracket 1 to the fixed platform 3, preventing the V-shaped bracket from moving axially, thereby improving the stability and reliability of the centering support for the elastic support 300 of the pull rod. The contact plate 12 contacts the pull rod elastic support 300 , so that the weight of the pull rod elastic support 300 is more evenly distributed on the V-shaped bracket 1 .

[0041] The loading test method of the elastic support of the tie rod adopts the loading test device of the elastic support of the tie rod described above for loading, and is characterized in that: according to the deflection angle in the actual application condition of the elastic support of the tie rod 300, the angle of the deflection angle α between the pressure-bearing component 4 and the axial loading platform 2 is adjusted before loading, and the maximum loading load of the axial loading platform 2 is adjusted according to the angle of the deflection angle α during loading, so that the deflection angle α between the pressure-bearing component 4 and the axial loading platform 3 can be reduced to zero after loading.

[0042] The loading test method of the tie rod elastic support described above realizes the composite deformation of the axial and deflection of the tie rod elastic support 300 through unidirectional loading, simulates the fatigue condition of the tie rod elastic support under the axial load and deflection angle at the same time, improves the operability of the test and the reliability of the test data, and adjusts the angle of the deflection angle α between the pressure-bearing component 4 and the axial loading platform 2 and the maximum loading load of the axial loading platform 2 according to different actual application conditions, so that the deflection angle of the tie rod elastic support 300 after loading is consistent with the deflection angle in the actual application condition, meets different deflection requirements, and provides reliable data support for product improvement.

[0043] The deflection angle α between the pressure-bearing assembly 4 and the axial loading platform 2 can be adjusted before loading by replacing the inclined loading plate 42 with inclined surfaces of different angles. By designing the inclined loading plate 42 with inclined surfaces 421 of different angles, the deflection angle α between the pressure-bearing assembly 4 and the axial loading platform 2 can be adjusted simply by replacing the inclined loading plate 42. This simple replacement operation facilitates adjustment of the desired deflection angle, improving the operability and practicality of the test.

[0044] The above fully describes the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the embodiments described are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A horizontal loading test device for elastically supported tie rods, comprising an axial loading platform capable of applying an axial load, a fixed platform disposed opposite the axial loading platform, and a V-shaped bracket disposed between the axial loading platform and the fixed platform. The elastically supported tie rods are horizontally supported on the V-shaped bracket, and are characterized by: It also includes a pressure-bearing component coaxially connected to the elastic support of the pull rod and a support plate coaxially fixed to the support seat of the elastic support of the pull rod and in contact with the fixed table. The pressure-bearing component is in linear contact with the axial loading table, forming a deflection angle between the pressure-bearing component and the axial loading table. The pressure-bearing component pushes the elastic support of the pull rod to rotate around the spherical surface of the support seat as the axial loading table is loaded, forming axial compression and deflection, and the deflection angle decreases as the elastic support of the pull rod deflects. The pressure-bearing assembly includes a pressure-bearing cylinder coaxially connected to the pull rod elastic support and an inclined loading plate in line contact with the axial loading platform. One end of the pressure-bearing cylinder, which is close to the fixing platform, is inserted into the pull rod elastic support and fixed thereto. One end of the pressure-bearing cylinder, which is close to the axial loading platform, is fixed to the inclined loading plate. The side of the inclined loading plate in line contact with the axial loading platform is an inclined surface that is not parallel to the radial direction of the pull rod elastic support. A deflection angle is formed between the inclined surface and the axial loading platform. The outer diameter of the pressure-bearing cylinder is smaller than the inner diameter of the cover plate of the pull rod elastic support, forming a reserved space between the pressure-bearing cylinder and the cover plate. The pressure-bearing cylinder has an external thread section and an annular step surface at one end close to the fixed platform. The pressure-bearing cylinder extends into the middle plate elastically supported by the pull rod. The annular step surface abuts against the end surface of the middle plate. The external thread section extends from the middle plate and is fitted with a locking nut. The middle plate is clamped between the locking nut and the annular step surface. The locking nut is axially spaced from the support plate and does not contact it. The slope loading plate is fixed to the pressure-bearing cylinder on one side thereof, and a positioning circular groove is provided for radial positioning of the pressure-bearing cylinder. One end of the pressure-bearing cylinder is positioned in the positioning circular groove. The slope loading plate is provided with a countersunk hole arranged along the axial direction. One end of the pressure-bearing cylinder is provided with a connecting hole corresponding to the countersunk hole. Bolts are inserted into the countersunk hole and fastened to the connecting hole to fix the pressure-bearing cylinder and the slope loading plate. A pressure-bearing protection plate is fixed on the end face of the axial loading platform, which is in line contact with the slope loading plate. A deflection angle is formed between the slope loading plate and the pressure-bearing protection plate. The top surface of the slope loading plate is located outside the pressure cylinder. The edge of the top surface of the slope loading plate is in line contact with the pressure protection plate, and the distance between the contact line and the center of the spherical surface of the support seat is equal to the radius of the spherical surface of the support seat.

2. The horizontal loading test device for elastic support of a pull rod according to claim 1, characterized in that: The support plate is radially positioned and matched with the convex ring on the end surface of the support seat. The convex ring extends into the support plate, and the height of the convex ring is less than the thickness of the support plate.

3. The horizontal loading test device for elastic support of a pull rod according to claim 1, characterized in that: The anti-rotation seat is fixed on the V-shaped bracket, and the anti-rotation seat is symmetrically arranged on the left and right of the V-shaped bracket. The anti-rotation seat is connected to the cover plate elastically supported by the pull rod through the anti-rotation plate. A waist-shaped hole is opened at one end of the anti-rotation plate and a round hole is opened at the other end. The anti-rotation seat is connected to the waist-shaped hole through a bolt. The self-prestressed screw of the cover plate is threaded with a threaded sleeve, and the threaded sleeve passes through the round hole and is connected to the anti-rotation plate.

4. The loading test device for elastic support of a pull rod according to claim 1, characterized in that: The V-shaped bracket is welded from a square steel pipe. The V-shaped bracket is close to the fixed platform. The V-shaped bracket has a stop plate and a contact plate to limit the movement of the V-shaped bracket. The stop plate and the contact plate are symmetrically arranged on the V-shaped bracket, and the pull rod is elastically supported on the contact plate.

5. A loading test method for a tie rod elastic support, comprising: performing loading using the horizontal loading test device for a tie rod elastic support according to any one of claims 1 to 4, wherein: According to the deflection angle in the actual application conditions of the elastic support of the pull rod, the deflection angle between the pressure-bearing component and the axial loading platform is adjusted before loading, and the maximum loading load of the axial loading platform is adjusted according to the deflection angle during loading, so that the deflection angle between the pressure-bearing component and the axial loading platform can be reduced to zero after loading.

6. The loading test method for elastic support of a pull rod according to claim 5, characterized in that: Replace the slope loading plate with different angles of slope to adjust the deflection angle between the pressure component and the axial loading platform before loading.

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