Coupler axial and radial rigidity experiment table

Abstract

The utility model provides a coupling axial and radial rigidity experiment table which comprises a carbon steel supporting column, an upper fixing plate, a lower fixing plate, a guide rod, an upper sliding block, a lower sliding block, a fixing block, a plurality of tension and pressure sensors, a tension sensor, a first threaded rod, a second threaded rod and a piece to be tested, and the upper fixing plate and the lower fixing plate are arranged at the upper end and the lower end of the carbon steel supporting column at intervals. The guide rod is vertically arranged between the upper fixing plate and the lower fixing plate, the upper sliding block and the lower sliding block are arranged between the upper fixing plate and the lower fixing plate at intervals in the axial direction of the guide rod, the upper end and the lower end of a to-be-tested piece are fixedly connected to the upper sliding block and the lower sliding block respectively, and the upper sliding block is slidably connected to the guide rod and is in threaded connection to the upper fixing plate through a first threaded rod. The upper sliding block is slidably connected with the lower fixing plate so that the upper sliding block can drive the to-be-tested piece to move in the axial direction of the guide rod, and the lower sliding block is slidably connected with the lower fixing plate so that the lower sliding block can drive the to-be-tested piece to move in the radial direction of the lower fixing plate. The experiment table is small in size, easy to operate and good in universality.

Description

Technical Field

[0001] The utility model relates to the field of stiffness test experiments, and particularly relates to a coupling axial and radial stiffness test bench. Background Technique

[0002] Stiffness is the external force value required to produce a unit deformation of an object. Stiffness is related to the material properties, geometric shape, boundary support conditions, and external force application form of the object. The greater the elastic modulus and shear modulus (mechanical properties of the material) of the material, the greater the stiffness. In nature, animals and plants need to have sufficient stiffness to maintain their shapes. In engineering, some machines, bridges, buildings, aircraft, and ships have experienced instability or catastrophic accidents such as flutter in the flow field due to insufficient structural stiffness. Therefore, in the design, it is necessary to ensure that the structure has sufficient stiffness according to the specification requirements.

[0003] However, the coupling stiffness test bench frames on the current market are usually relatively large in volume, inconvenient for transportation and transfer, require a large test environment, and have high equipment costs and maintenance costs. In addition, the operation of the current test bench frames on the market is relatively cumbersome and requires prior training of personnel, resulting in low practicability, applicability, and market competitiveness. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects of the relatively large volume and cumbersome operation of the existing coupling stiffness test bench frames, and to provide a coupling axial and radial stiffness test bench.

[0005] The utility model solves the above technical problem through the following technical solutions:

[0006] The utility model provides a coupling axial and radial stiffness test bench, which is characterized in that it includes a carbon steel pillar, an upper fixing plate, a lower fixing plate, a guide rod, an upper slider, a lower slider, a fixing block, a plurality of tension and compression sensors, a tension sensor, a first threaded rod, a second threaded rod, and a test piece. The upper fixing plate and the lower fixing plate are arranged at intervals at the upper end and the lower end of the carbon steel pillar. The guide rod is vertically arranged between the upper fixing plate and the lower fixing plate. The upper slider and the lower slider are arranged at intervals along the axial direction of the guide rod between the upper fixing plate and the lower fixing plate. The upper and lower ends of the test piece are respectively fixedly connected to the upper slider and the lower slider. The upper slider is slidably connected to the guide rod and is threadedly connected to the upper fixing plate through the first threaded rod, so that the upper slider can drive the test piece to move along the axial direction of the guide rod. The lower slider is slidably connected to the lower fixing plate, so that the lower slider can drive the test piece to move along the radial direction of the lower fixing plate. The second threaded rod is threadedly connected through the upper fixing plate and abuts against the test piece. The plurality of tension and compression sensors are arranged at intervals on the upper slider and are all connected to the test piece and the second threaded rod. In the radial direction of the lower fixing plate, the fixing block is arranged on the lower fixing plate, and the tension sensor is arranged between the fixing block and the test piece. In the radial direction of the lower fixing plate, one end of the screw rod of the tension sensor is connected to one side of the lower slider, and the other end of the screw rod of the tension sensor penetrates through the fixing block and is connected with a nut at the outer end of the other end of the screw rod, so that when the nut is rotated, the screw rod drives the lower slider and the test piece to slide along the radial direction of the lower fixing plate.

[0007] Preferably, the coupling axial and radial stiffness test bench further includes a first shoulder bushing, a first diaphragm group, a first gasket, a second shoulder bushing, a second diaphragm group, and a second gasket. The first diaphragm group and the first gasket are sequentially arranged between the upper slider and the test piece. The first shoulder bushing is arranged on the upper slider, and the upper slider is bolted to the test piece through the first shoulder bushing. The second diaphragm group and the second gasket are sequentially arranged between the lower slider and the test piece. The second shoulder bushing is arranged on the lower slider, and the lower slider is bolted to the test piece through the second shoulder bushing.

[0008] Preferably, the tension sensor is arranged between the lower slider and the fixing block, and the central heights of the tension sensor and the lower slider are at the same horizontal plane.

[0009] Preferably, the fixing block and the lower fixing plate are bolted together.

[0010] Preferably, a dovetail groove extending radially along the lower fixing plate is provided between the lower sliding block and the lower fixing plate, so that the lower sliding block can drive the workpiece to be measured to move radially along the lower fixing plate.

[0011] Preferably, the guide rod vertically penetrates through the upper fixing plate, the upper sliding block and the lower fixing plate in sequence.

[0012] Preferably, four threaded lifting holes are provided at the top of the upper fixing plate.

[0013] Preferably, the axial-radial stiffness test bench for the coupling includes a force applying rod, which is arranged at the top of the second threaded rod. The axis of the second threaded rod is perpendicular to the axis of the force applying rod, and the second threaded rod is fixedly connected to several of the tension and compression sensors.

[0014] Preferably, the first threaded rod is fixedly connected to the upper sliding block.

[0015] Preferably, the number of the carbon steel struts is 4, and the 4 carbon steel struts are arranged in a rectangle.

[0016] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0017] The positive and progressive effects of the present invention are as follows: In the present invention, the axial-radial stiffness test bench for the coupling can meet the stiffness test requirements of most couplings on the market, and the axial and radial forces can be adjusted conveniently. Compared with the previous products, it has a smaller volume, a simpler and more reliable structure, is easy to operate, has a lower cost, has good specificity and universality, and fills the market gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the axial-radial stiffness test bench for the coupling of the present invention.

[0019] Figure 2 is a partial schematic structural diagram of the axial-radial stiffness test bench for the coupling of the present invention.

[0020] Figure 3 is a schematic structural diagram of the dovetail groove of the present invention.

[0021] Figure 4 is a partial structural sectional view of the axial-radial stiffness test bench for the coupling of the present invention.

[0022] Description of the reference numerals:

[0023] Upper fixing plate 1

[0024] Lower fixing plate 2

[0025] Carbon steel strut 3

[0026] Guide rod 4

[0027] Upper slider 5

[0028] Lower slider 6

[0029] Second threaded rod 7

[0030] Force - adding rod 71

[0031] First threaded rod 72

[0032] Fixed block 8

[0033] Tensile - compressive force sensor 9

[0034] Diaphragm group 10

[0035] First shoulder bushing 11

[0036] Second shoulder bushing 110

[0037] First gasket 12

[0038] Second gasket 120

[0039] Hexagon socket head cap screw 13

[0040] Dovetail groove 14

[0041] Screw rod 15

[0042] Tensile force sensor 16

[0043] Nut 17

[0044] Tensile - compressive force sensor connector 18

[0045] Threaded lifting hole 19

[0046] Test piece 20 Specific implementation mode

[0047] The following will more clearly and completely illustrate the present utility model by way of examples in conjunction with the accompanying drawings, but the present utility model is not limited to the scope of the described examples.

[0048] The present utility model discloses an experimental bench for the axial and radial stiffness of a coupling, as Figures 1-4As shown in the figure, it includes a carbon steel support column 3, an upper fixing plate 1, a lower fixing plate 2, a guide rod 4, an upper slider 5, a lower slider 6, a fixing block 8, several tension and compression sensors 9, a tension sensor 16, a first threaded rod 72, a second threaded rod 7, and a workpiece to be tested 20. The upper fixing plate 1 and the lower fixing plate 2 are arranged at intervals at the upper and lower ends of the carbon steel support column 3. The guide rod 4 is vertically arranged between the upper fixing plate 1 and the lower fixing plate 2. The upper slider 5 and the lower slider 6 are arranged at intervals along the axial direction of the guide rod 4 between the upper fixing plate 1 and the lower fixing plate 2. The upper and lower ends of the workpiece to be tested 20 are respectively fixedly connected to the upper slider 5 and the lower slider 6. The upper slider 5 is slidably connected to the guide rod 4 and is threadedly connected to the upper fixing plate 1 through the first threaded rod 72, so that the upper slider 5 can drive the workpiece to be tested 20 to move along the axial direction of the guide rod 4. The lower slider 6 is slidably connected to the lower fixing plate 2, so that the lower slider 6 can drive the workpiece to be tested 20 to move along the radial direction of the lower fixing plate 2. The second threaded rod 7 is threadedly penetrated and connected to the upper fixing plate 1 and abuts against the workpiece to be tested 20. Several tension and compression sensors 9 are arranged at intervals on the upper slider 5 and are all connected to the workpiece to be tested 20 and the second threaded rod 7. In the radial direction of the lower fixing plate 2, the fixing block 8 is arranged on the lower fixing plate 2, and the tension sensor 16 is arranged between the fixing block 8 and the workpiece to be tested 20. In the radial direction of the lower fixing plate 2, one end of the screw rod 15 of the tension sensor 16 is connected to one side of the lower slider 6, and the other end of the screw rod 15 of the tension sensor 16 penetrates through the fixing block 8 and is connected with a nut 17 at the outer end of the other end of the screw rod 15, so that when the nut 17 is rotated, the screw rod 15 drives the lower slider 6 and the workpiece to be tested 20 to slide along the radial direction of the lower fixing plate 2.

[0049] Specifically, the upper surface of the lower fixing plate 2 is flat and is a horizontal plane. The radial direction of the workpiece to be tested 20 is consistent with the radial direction of the lower fixing plate 2. The axial direction of the workpiece to be tested 20 is consistent with the axial direction of the guide rod 4. The upper fixing plate 1, the lower fixing plate 2 and the carbon steel support column 3 are fixedly connected by welding to form a frame assembly. The frame assembly is fixed during operation.

[0050] The number of the guide rods 4 is set to 2, and the lower fixing plate 2 is welded to the two guide rods 4. The two guide rods 4 are arranged oppositely on the lower fixing plate 2, so that the guiding property of the upper slider 5 is better.

[0051] The slider assembly consists of the component under test 20 and various connecting parts. The component under test 20 is fixedly connected to the upper slider 5 and the lower slider 6 respectively through bolts and diaphragms. A guiding hole is provided on the upper slider 5 to cooperate with the guiding rod 4, and the upper slider 5 is threadedly connected to the upper fixing plate 1 through the first threaded rod 72. Two first threaded rods 72 are provided, and two threaded holes are correspondingly provided on the upper fixing block 8 to realize the translational movement of the axial degree of freedom of the component under test 20. The tensile and compressive force sensor 9 is installed on the upper slider 5 and is fixedly connected to the component under test 20. The second threaded rod 7 is equipped with a force applying rod 71 and is connected to the tensile and compressive force sensor 9 on the upper slider 5. By rotating the force applying rod 71, an axial force can be applied to the component under test 20; between the lower slider 6 and the lower fixing plate 2, they are cooperated through a dovetail groove 14 to realize the translational movement of the radial degree of freedom of the component under test 20. Fixing blocks 8 and a tensile force sensor 16 are provided in the radial direction of the lower fixing plate 2, and a radial force can be applied to the component under test 20.

[0052] This axial and radial stiffness test bench for couplings simplifies the structure and improves the integration degree. The frame assembly applies axial force and radial force by using the way of rotating threads. Compared with the traditional test bench, the operation is simple and the maintenance cost is low. Tensile force sensors 16 and tensile and compressive force sensors 9 are respectively arranged in the radial and axial directions of the slider assembly, and the experimental pressure data can be detected in real time. The fixed connection method of the diaphragm group 10 has good interchangeability. By replacing the slider die, it can adapt to the axial and radial stiffness experiments of common couplings.

[0053] The working principle and usage process of the present utility model: When this axial and radial stiffness test bench for couplings is actually used, first remove the upper fixing plate 1. The component under test 20 and the upper slider 5 are fixedly installed through the first shoulder bushing 11, the first gasket 12, the hexagon socket head bolt 13, and the first diaphragm group. After the component under test 20 and the lower slider 6 are fixedly installed through the second shoulder bushing 110, the second gasket 120, the hexagon socket head bolt 13, and the second diaphragm group, install the upper fixing plate 1; rotate the second threaded rod 7 to apply axial force and read the value through the tensile and compressive force sensor 9; rotate the nut 17 of the tensile force sensor 16 to apply radial force and read the value through the tensile force sensor 16. The stress state can be fixed by tightening the lock nut 17 to conduct the compressive resistance test.

[0054] In this embodiment, the axial and radial stiffness test bench for couplings further includes a first shoulder bushing 11, a first diaphragm group, a first gasket 12, a second shoulder bushing 110, a second diaphragm group, and a second gasket 120. The first diaphragm group and the first gasket 12 are sequentially arranged between the upper slider 5 and the component under test 20. The first shoulder bushing 11 is arranged on the upper slider 5, and the upper slider 5 is bolted to the component under test 20 through the first shoulder bushing 11. The second diaphragm group and the second gasket 120 are sequentially arranged between the lower slider 6 and the component under test 20. The second shoulder bushing 110 is arranged on the lower slider 6, and the lower slider 6 is bolted to the component under test 20 through the second shoulder bushing 110.

[0055] Specifically, both the first diaphragm group and the second diaphragm group consist of 4 diaphragms in a group, and the 4 diaphragm groups 10 form a quadrilateral. The two are respectively connected to the test piece 20 through the first shoulder bushing 11 and the first gasket 12, the second shoulder bushing 110 and the second gasket 120, and the external hexagon bolt 13, as Figure 4 shown, the first diaphragm group and the second diaphragm group fixedly connect the required components in the form of two on top and two at the bottom.

[0056] In this embodiment, the tension sensor 16 is arranged between the lower slider 6 and the fixed block 8, and the central heights of the tension sensor 16 and the lower slider 6 are at the same horizontal plane.

[0057] Specifically, the fixed block 8 and the lower slider 6 are fixedly connected through the tension sensor 16, and the radial force is provided by rotating the nut 17 of the tension sensor 16. The central heights of the tension sensor 16 and the lower slider 6 are at the same horizontal plane. Such a structure enables the lower slider 6 to better drive the test piece 20 to slide radially, facilitating the measurement of stiffness.

[0058] In this embodiment, the fixed block 8 and the lower fixing plate 2 are connected by bolts. The bolt connection has a simple structure and is reliable.

[0059] In this embodiment, a dovetail groove 14 extending radially along the lower fixing plate 2 is provided between the lower slider 6 and the lower fixing plate 2, so that the lower slider 6 can drive the test piece 20 to move radially along the lower fixing plate 2.

[0060] Specifically, a lower dovetail groove 14 is welded to the top of the lower fixing plate 2, and an upper dovetail groove 14 is welded to the bottom of the lower slider 6. The two are installed in cooperation to realize the radial sliding of the lower slider 6 driving the test piece 20.

[0061] In this embodiment, the guide rod 4 vertically penetrates through the upper fixing plate 1, the upper slider 5 and the lower fixing plate 2 in sequence, which can realize the up and down axial movement of the upper slider 5 driving the test piece 20, and is convenient for disassembling the upper fixing plate 1 and the lower fixing plate 2, which is more conducive to the installation of the test piece 20.

[0062] In this embodiment, four threaded lifting holes 19 are provided at the top of the upper fixing plate 1.

[0063] Specifically, the function of the threaded lifting holes 19 is to facilitate the disassembly and assembly of the upper fixing plate 1, making the installation of the test piece 20 more convenient. The four threaded lifting holes 19 are arranged in a rectangular shape, which can make the lifting force more uniform and the lifting work stable.

[0064] In this embodiment, the coupling axial and radial stiffness test bench includes a force applying rod 71. The force applying rod 71 is arranged on the top of the second threaded rod 7. The axial direction of the second threaded rod 7 is perpendicular to the axial direction of the force applying rod 71. The second threaded rod 7 is fixedly connected to a plurality of tension and compression sensors 9.

[0065] Specifically, by setting the force applying rod 71 to be perpendicular to the second threaded rod 7, when the force applying rod 71 is rotated, it is more convenient to rotate the second threaded rod 7, facilitating the application of an axial force to the test piece 20. The number of tension and compression sensors 9 can be set to 8 to make the experimental data more accurate. A tension and compression sensor connector 18 is provided on the top of the upper slider 5. The tension and compression sensors 9 are arranged around the tension and compression sensor connector 18. The bottom end of the second threaded rod 7 is connected through the tension and compression sensor connector 18.

[0066] In this embodiment, the first threaded rod 72 is fixedly connected to the upper slider 5. This connection method makes the upper slider 5 slide up and down more smoothly with good directivity.

[0067] In this embodiment, the number of carbon steel struts 3 is 4, and the 4 carbon steel struts 3 are arranged in a rectangle.

[0068] Specifically, all four carbon steel struts 3 are welded to the upper fixing plate 1 and the lower fixing plate 2.

[0069] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only for illustration. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A coupling axial and radial stiffness test bench, characterized in that: It includes a carbon steel pillar, an upper fixing plate, a lower fixing plate, a guide rod, an upper slider, a lower slider, a fixing block, several tension and compression sensors, a tension sensor, a first threaded rod, a second threaded rod, and a test piece. The upper fixing plate and the lower fixing plate are arranged at intervals at the upper and lower ends of the carbon steel pillar. The guide rod is vertically arranged between the upper fixing plate and the lower fixing plate. The upper slider and the lower slider are arranged at intervals along the axial direction of the guide rod between the upper fixing plate and the lower fixing plate. The upper and lower ends of the test piece are respectively fixedly connected to the upper slider and the lower slider. The upper slider is slidably connected to the guide rod and is threadedly connected to the upper fixing plate through the first threaded rod, so that the upper slider can drive the test piece to move along the axial direction of the guide rod. The lower slider is slidably connected to the lower fixing plate, so that the lower slider can drive the test piece to move along the radial direction of the lower fixing plate. The second threaded rod is threadedly connected through the upper fixing plate and abuts against the test piece. Several tension and compression sensors are arranged at intervals on the upper slider and are all connected to the test piece and the second threaded rod. In the radial direction of the lower fixing plate, the fixing block is arranged on the lower fixing plate, and the tension sensor is arranged between the fixing block and the test piece. In the radial direction of the lower fixing plate, one end of the screw rod of the tension sensor is connected to one side of the lower slider, and the other end of the screw rod of the tension sensor penetrates out of the fixing block and is connected with a nut at the outer end of the other end of the screw rod, so that when the nut is rotated, the screw rod drives the lower slider and the test piece to slide along the radial direction of the lower fixing plate.

2. The axial and radial stiffness test bench for the coupling according to claim 1, characterized in that: The coupling axial and radial stiffness test bench further includes a first shoulder bushing, a first diaphragm group, a first gasket, a second shoulder bushing, a second diaphragm group, and a second gasket. The first diaphragm group and the first gasket are sequentially arranged between the upper slider and the test piece. The first shoulder bushing is arranged on the upper slider, and the upper slider is bolted to the test piece through the first shoulder bushing. The second diaphragm group and the second gasket are sequentially arranged between the lower slider and the test piece. The second shoulder bushing is arranged on the lower slider, and the lower slider is bolted to the test piece through the second shoulder bushing.

3. The axial and radial stiffness test bench for the coupling according to claim 1, characterized in that: The tension sensor is arranged between the lower slider and the fixing block, and the center heights of the tension sensor and the lower slider are on the same horizontal plane.

4. The axial and radial stiffness test bench for the coupling as described in claim 1, characterized in that: The fixing block and the lower fixing plate are bolted together.

5. The axial and radial stiffness test bench for the coupling according to claim 1, wherein: A mating dovetail groove extending along the radial direction of the lower fixing plate is arranged between the lower slider and the lower fixing plate.

6. The axial and radial stiffness test bench for the coupling according to claim 1, characterized in that: The guide rod vertically penetrates through the upper fixing plate, the upper slider, and the lower fixing plate in sequence.

7. The axial and radial stiffness test bench for the coupling as described in claim 1, characterized in that: Four threaded lifting holes are arranged at the top of the upper fixing plate.

8. The axial and radial stiffness test bench for couplings according to claim 1, characterized in that: The coupling axial and radial stiffness test bench includes a force applying rod. The force applying rod is arranged at the top of the second threaded rod. The axial direction of the second threaded rod is perpendicular to the axial direction of the force applying rod. The second threaded rod is fixedly connected to several tension and compression sensors.

9. The axial and radial stiffness test bench for couplings according to claim 1, characterized in that: The first threaded rod is fixedly connected to the upper slider.

10. The axial and radial stiffness test bench for coupling according to claim 1, characterized in that: The number of the carbon steel struts is four, and the four carbon steel struts are arranged in a rectangle.

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