Torque experiment device

Abstract

The utility model provides a torque experiment device, which is provided with an open end and is internally provided with a base with a first space, a press is arranged in the first space, the press comprises a top cover and a lower cylinder which are detachably connected, the lower cylinder is fixed with the side wall of the base, a torque sensor is arranged below the lower cylinder, and a lower anvil is arranged in the lower cylinder; the top cover is movably connected with a piston, the piston penetrates through the top cover in the vertical direction and then is provided with an annular protruding part, the protruding part abuts against the side, close to the lower cylinder, of the top cover, the bottom end of the protruding part is fixedly connected with an upper anvil, a driving assembly is arranged on the base, and the driving end of the driving assembly is connected with the piston. According to the device, the driving assembly and the press for applying the axial pressure are arranged, so that the driving assembly drives the piston to rotate around the axis of the piston so as to drive the upper anvil to apply the radial shearing force to the sample, and the experimental environment in which the sample is subjected to the axial pressure and the radial shearing force at the same time is realized; the torque applied to the sample in each experiment can be obtained, and the accuracy of the experiment process is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of in-situ measurement devices for physical quantities under high temperature and high pressure, and in particular to a torque test device. Background Art

[0002] The diamond anvil press experimental technology has become an important auxiliary means of modern cutting-edge extreme environment scientific research. The pressure generated between the anvils can reach hundreds of GPa. It is currently the only scientific device that can produce a static pressure of one million atmospheres and is the most important scientific instrument in the field of high-pressure science and technology research. In high-pressure physics experiments, in addition to studying the effects of high pressure on samples under axial loading, the effects of radial shear force on samples should also be studied. Current high-pressure equipment is often continuously updated in terms of axial loading, while radial shear force is rarely studied. Utility Model Content

[0003] The purpose of this application is to address the above problems and provide a torque test device suitable for a diamond anvil press to study the effects of simultaneous axial and radial shear loading on samples, thereby expanding the application development direction and research environment of high-pressure test devices.

[0004] A torque test device, comprising:

[0005] A base having an open end and forming a first space therein;

[0006] A press, the press is arranged in the first space, and comprises a detachably connected top cover and a lower cylinder, the lower cylinder is fixedly connected to the side wall of the base and a torque sensor is arranged below, and a lower anvil is arranged in the lower cylinder; the top cover is movably connected to a piston, and the piston is provided with an annular protrusion after penetrating the top cover in the vertical direction, the protrusion abuts against a side of the top cover close to the lower cylinder, an upper anvil is fixedly connected to the bottom end of the protrusion, and a gap is provided between the upper anvil and the lower anvil, and the gap is used to place the sample;

[0007] A driving assembly is disposed on the base, the driving assembly is connected to the piston through the open end, and the driving assembly is used to drive the piston to rotate around its axis to drive the upper anvil to apply radial shear force to the sample.

[0008] According to the technical solutions provided in some embodiments of the present application, the piston is provided with a first light through hole penetrating through the piston in a vertical direction, and the first light through hole is arranged facing the sample.

[0009] According to the technical solutions provided in some embodiments of the present application, second light holes are provided at corresponding positions of the base and the side wall of the lower cylinder, and the second light holes are arranged facing the sample.

[0010] According to the technical solution provided in certain embodiments of the present application, the base includes a detachably connected fixing seat and a fixing cover, the fixing seat and the fixing cover together enclose the first space, the end surface of the fixing cover close to the fixing seat abuts against the end surface of the top cover away from the lower cylinder, and the fixing cover is provided with a through hole corresponding to the piston, and the through hole forms the opening end.

[0011] According to the technical solution provided in certain embodiments of the present application, a pressure control component is also included, which is used to apply vertical pressure to the lower cylinder from the side of the lower cylinder away from the top cover to change the pressure exerted on the sample during the experiment.

[0012] According to the technical solution provided in certain embodiments of the present application, the pressure control assembly includes an air pump arranged on one side of the base, the air pump is connected to an elastic air bag through an air pipe, and the elastic air bag is arranged below the torque sensor.

[0013] According to the technical solution provided in certain embodiments of the present application, the driving assembly includes a driving motor, which is fixedly connected to one side of the fixing seat. The driving shaft of the driving motor extends in a vertical direction and is connected to a transmission mechanism, and the transmission mechanism can drive the piston to rotate under the drive of the driving motor.

[0014] According to the technical solutions provided in certain embodiments of the present application, the transmission mechanism includes a driving gear, which is sleeved on the driving shaft and fixedly connected to the driving shaft; the transmission mechanism also includes a transmission rod, one end of which is fixedly connected to the piston, and the other end of which passes through the through hole in a vertical direction and is sleeved with a driven gear coaxial with the through hole, and the transmission rod is provided with a third light-through hole coaxial with the first light-through hole, and a transmission belt is jointly sleeved on the outer periphery of the driven gear and the driving gear.

[0015] According to the technical solution provided in certain embodiments of the present application, a deep groove ball bearing is provided in the through hole, the outer ring of the deep groove ball bearing is fixedly connected to the inner wall of the through hole, and the inner ring of the deep groove ball bearing is sleeved on the transmission rod and fixedly connected to the transmission rod.

[0016] According to the technical solution provided in certain embodiments of the present application, a thrust ball bearing is provided on the piston, and the thrust ball bearing is located between the top cover and the raised portion, the shaft ring of the thrust ball bearing is fixedly connected to the top cover, and the seat ring of the thrust ball bearing is fixedly connected to the raised portion.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows: the present application provides a torque test device, which is provided with a base having an open end and forming a first space inside, a press is provided in the first space, the press comprises a detachably connected top cover and a lower cylinder, the lower cylinder is fixed to the side wall of the base and a torque sensor is provided below, and a lower anvil is provided in the lower cylinder; the top cover is movably connected with a piston, and the piston is provided with an annular protrusion after passing through the top cover in the vertical direction, the protrusion abuts against the side of the top cover close to the lower cylinder, an upper anvil is fixedly connected to the bottom end of the protrusion, and a driving assembly is also provided on the base, and the driving assembly is connected to the piston through the open end; the present application provides a driving assembly and a press for axially pressurizing the sample, so that the driving assembly drives the piston of the press to rotate around its axis, so as to drive the upper anvil to apply radial shear force to the sample, thereby realizing an experimental environment in which the sample is subjected to axial pressure and radial shear force at the same time, and further, by providing a torque sensor, the torque applied to the sample in each experiment can be obtained, thereby ensuring the accuracy of the experimental process.

[0018] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of features or beneficial effects means that specific technical features, technical solutions or beneficial effects are included in at least one embodiment. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be realized without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in a specific embodiment that does not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the appearance of a torque test device provided in an embodiment of the present application;

[0021] Figure 2 An exploded diagram of the structure of a torque test device provided in an embodiment of the present application;

[0022] Figure 3 A schematic cross-sectional view of a press of a torque testing device provided in an embodiment of the present application.

[0023] The text annotations in the figure represent:

[0024] 1. Fixed seat; 2. Fixed cover; 3. Press; 4. Torque sensor; 5. Elastic air bag; 6. Driving motor; 7. Driving gear; 8. Driving belt; 9. Driven gear; 10. Driving rod; 11. Deep groove ball bearing; 31. Top cover; 32. Lower cylinder; 33. Piston; 34. Upper anvil; 35. Lower anvil; 36. Thrust ball bearing. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present application. Specifically, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] As mentioned in the background technology, in view of the problems in the prior art, this embodiment provides a torque test device, including:

[0028] A base having an open end and forming a first space therein;

[0029] The press 3 is arranged in the first space, and comprises a detachably connected top cover 31 and a lower cylinder 32, wherein the lower cylinder 32 is fixedly connected to the side wall of the base and a torque sensor 4 is arranged below the lower cylinder 32, and a lower anvil 35 is arranged inside the lower cylinder 32; the top cover 31 is movably connected to a piston 33, and the piston 33 is provided with an annular protrusion after penetrating the top cover 31 in the vertical direction, and the protrusion abuts against a side of the top cover 31 close to the lower cylinder 32, and an upper anvil 34 is fixedly connected to the bottom end of the protrusion, and a gap is provided between the upper anvil 34 and the lower anvil 35, and the gap is used to place the sample;

[0030] The driving assembly is arranged on the base, and the driving assembly is connected to the piston 33 through the open end. The driving assembly is used to drive the piston 33 to rotate around its axis to drive the upper anvil 34 to apply radial shear force to the sample.

[0031] like Figure 2 As shown, the base is a rectangular shell, a first space is formed inside the shell, the open end is located at the top of the shell and is connected to the first space, the press 3 is a cylinder, the top cover 31 of the press 3 is connected to the lower cylinder 32 by a pressure bolt, the piston 33 can be displaced in the vertical direction and can be rotated relative to the top cover 31, the raised portion abutting against the lower surface of the top cover 31 can limit the displacement of the piston 33 in the vertical direction, the upper anvil 34 and the lower anvil 34 are common diamond anvils in the prior art, a torque sensor 4 is arranged under the lower cylinder 32, the torque sensor 4 is electrically connected to a detection device, the torque sensor 4 can measure the torque applied to the lower cylinder 32 in the experiment and convert it into an electrical signal for transmission to the detection device, and the specific value of the torque applied to the sample can be obtained through the detection device.

[0032] When in use, first, place the sample in the gap between the upper anvil 34 and the lower anvil 34, place the press 3 on the pressurizing device, apply pressure to the press 3, use the pressurizing bolts to make the top cover 31 and the upper cylinder 32 engage, and place the press 3 after the pressurization is completed in the first space; start the drive assembly, the drive assembly drives the piston 33 to rotate around its axis, and at the same time drives the upper anvil 34 to rotate so that the sample is subjected to radial shear force. At this time, the lower anvil 35 and the lower cylinder 32 are subjected to the same torque. The torque applied in this test can be obtained through the torque sensor 4 under the lower cylinder 32, so that the torque applied to the sample can be accurately controlled. After the experiment, the sample can be tested, for example, the sample can be taken out for testing, and the experimental data of this experiment can be obtained according to the state of the sample at this time and the pressure and torque values ​​applied to the sample in this test.

[0033] The present application sets a driving component and a press 3 for axially applying pressure to the sample, so that the driving component drives the piston 33 of the press 3 to rotate around its axis, thereby driving the upper anvil 34 to apply radial shear force to the sample, thereby realizing an experimental environment in which the sample is subjected to axial pressure and radial shear force at the same time. Furthermore, by setting a torque sensor 4, the torque applied to the sample in each experiment can be obtained, thereby ensuring the accuracy of the experimental process.

[0034] In a preferred embodiment, the piston 44 is provided with a first light through hole which passes through the piston 44 in a vertical direction, and the first light through hole is arranged facing the sample.

[0035] like Figure 3As shown, the first light hole is arranged opposite to the upper anvil 34. The diamond material of the upper anvil 34 is light-transmissive. During the experiment, the detection light beam can be irradiated onto the cross section of the sample through the light path formed by the first light hole, and the state of the sample during the experiment is detected according to the reflection of the light beam.

[0036] In a preferred embodiment, second light holes are provided at corresponding positions of the base and the side wall of the lower cylinder 32 , and the second light holes are arranged facing the sample.

[0037] like Figure 1 As shown, the second light hole also forms an optical path for the detection light beam to pass through, so that the detection light beam can illuminate the sample from one side of the sample to detect the state of the sample during the experiment.

[0038] In a preferred embodiment, the base includes a detachably connected fixing seat 1 and a fixing cover 2, which together enclose a first space, and an end surface of the fixing cover 2 close to the fixing seat 1 abuts against an end surface of the top cover 31 away from the lower cylinder 32, and a through hole corresponding to the piston 33 is provided on the fixing cover 2, and the through hole forms an open end.

[0039] like Figure 2 As shown, the fixed seat 1 is used to place the press 3, and the lower cylinder 32 of the press 3 is fixedly connected to the side wall of the fixed seat 1. After the fixed cover 2 is buckled and connected to the fixed seat 1, the fixed cover 2 can limit the top cover 31, and the driving component can be connected to the piston 33 through the through hole.

[0040] In a preferred embodiment, the torque test device further includes a pressure control component, which is used to apply vertical pressure to the lower cylinder 32 from the side of the lower cylinder 32 away from the top cover 31 to change the pressure on the sample during the experiment.

[0041] like Figure 2 As shown, by setting the pressure control component, the pressure applied to the sample can be changed during the experiment, making the experimental device more adaptable.

[0042] In a preferred embodiment, the pressure control assembly includes an air pump disposed on one side of the base, the air pump is connected to an elastic air bag 5 through an air pipe, and the elastic air bag 5 is disposed below the torque sensor 4 .

[0043] like Figure 2 As shown, during the experiment, the elastic air bag 4 is inflated by an air pump, the elastic air bag 4 begins to expand, and squeezes the lower cylinder 32. The lower cylinder 32 is subjected to pressure from bottom to top. Since the top cover 31 and the fixed cover 2 are in contact with each other, the press 3 will not be displaced in the vertical direction due to the limitation of the fixed cover 2. At this time, the pressure on the sample increases. The pressure applied to the sample can be changed by controlling the inflation and deflation of the elastic air bag 4 through the air pump.

[0044] In a preferred embodiment, the driving assembly includes a driving motor 6, which is fixedly connected to one side of the fixing base 1. The driving shaft of the driving motor 6 extends in a vertical direction and is connected to a transmission mechanism, which can drive the piston 33 to rotate under the drive of the driving motor 6.

[0045] In a preferred embodiment, the transmission mechanism includes a driving gear 7, which is sleeved on the driving shaft and fixedly connected to the driving shaft; the transmission mechanism also includes a transmission rod 10, one end of which is fixedly connected to the piston 33, and the other end of which passes through the through hole in the vertical direction and is sleeved with a driven gear 9 coaxial with the driving shaft. The transmission rod 10 is provided with a third light hole coaxial with the first light hole, and a transmission belt 8 is jointly sleeved on the outer periphery of the driven gear 9 and the driving gear 7.

[0046] like Figure 2 and Figure 3 As shown, the driving motor 6 is fixed on one side of the fixing base 1. In this embodiment, the number of teeth of the driven gear 9 is 54, and the number of teeth of the driving gear 7 is 36. When in use, the driving motor 6 drives the driving gear 7 to rotate around its axis, and the driving gear 7 drives the driven gear 9 to rotate through the transmission belt 8, and the driven gear 9 drives the piston 33 to rotate through the transmission rod 10, so as to apply radial shear force to the sample. By setting a transmission mechanism and selecting a driven gear 9 with a larger number of teeth than the driving gear 7, the torque generated by the driving motor 6 can be increased after being transmitted by the driving gear 7 and the driven gear 9, which is more conducive to the torque experiment.

[0047] In a preferred embodiment, a deep groove ball bearing 11 is provided in the through hole, the outer ring of the deep groove ball bearing 11 is fixedly connected to the inner wall of the through hole, and the inner ring of the deep groove ball bearing 11 is sleeved on the transmission rod 10 and fixedly connected to the transmission rod 10.

[0048] like Figure 2 As shown, the deep groove ball bearing 11 has an inner ring and an outer ring that can rotate with each other. When the transmission rod 10 rotates, the deep groove ball bearing 11 can effectively reduce the friction between the transmission rod 10 and the fixed cover 2 when the transmission rod 10 rotates.

[0049] In a preferred embodiment, a thrust ball bearing 36 is sleeved on the piston 33, and the thrust ball bearing 36 is located between the top cover 31 and the raised portion. The shaft ring of the thrust ball bearing 36 is fixedly connected to the top cover, and the seat ring of the thrust ball bearing 36 is fixedly connected to the raised portion.

[0050] like Figure 3 As shown, the thrust ball bearing 36 has a shaft ring and a seat ring that can rotate with each other, and has the characteristic of being able to withstand axial high pressure when rotating. The thrust ball bearing 36 is arranged between the top cover 31 and the protrusion, and can effectively reduce the friction between the protrusion and the top cover 31 when the piston 33 rotates while being subjected to axial pressure.

[0051] Working principle: before conducting the experiment, first pressurize the press 3 according to the experimental requirements, start the experimental device, drive the motor 6 to drive the active gear 7 to rotate, the active gear 7 rotates the driven gear 9 through the transmission belt 8, and the driven gear 9 drives the piston 33 to rotate through the transmission rod 10. The deep groove ball bearing 11 and the thrust ball bearing 36 can effectively reduce the friction generated by the transmission rod 10 and the piston 33 during rotation. The upper anvil 34 follows the rotation to apply radial shear force to the sample. By injecting a detection beam into the first light hole, the impact of the sample in a rotating high-pressure environment can be obtained. The torque sensor 4 under the lower cylinder 32 can be used to know the torque applied to the sample during the experiment, thereby ensuring the accuracy of the experiment. At the same time, the elastic air bag 5 can be inflated or deflated by an air pump to apply additional axial pressure to the sample, and the applied pressure is adjustable, thereby improving the applicability of the experimental device.

[0052] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A torque test device, characterized in that: include: A base having an open end and forming a first space therein; A press (3), the press (3) being arranged in the first space, comprising a detachably connected top cover (31) and a lower cylinder (32), the lower cylinder (32) being fixedly connected to the side wall of the base and having a torque sensor (4) arranged below, and a lower anvil (35) arranged inside the lower cylinder (32); the top cover (31) being movably connected to a piston (33), the piston (33) being provided with an annular protrusion after penetrating the top cover (31) in a vertical direction, the protrusion abutting against a side of the top cover (31) close to the lower cylinder (32), the bottom end of the protrusion being fixedly connected to an upper anvil (34), a gap being provided between the upper anvil (34) and the lower anvil (35), the gap being used for placing a sample; A driving assembly is arranged on the base, the driving assembly is connected to the piston (33) through the open end, and the driving assembly is used to drive the piston (33) to rotate around its axis to drive the upper anvil (34) to apply radial shear force to the sample.

2. A torque test device according to claim 1, characterized in that: The piston (33) is provided with a first light through hole which passes through the piston in a vertical direction, and the first light through hole is arranged facing the sample.

3. A torque test device according to claim 1, characterized in that: Second light-through holes are provided at corresponding positions of the base and the side wall of the lower cylinder (32), and the second light-through holes are arranged facing the sample.

4. A torque test device according to claim 2, characterized in that: The base comprises a detachably connected fixing seat (1) and a fixing cover (2), wherein the fixing seat (1) and the fixing cover (2) together enclose the first space, and an end surface of the fixing cover (2) close to the fixing seat (1) abuts against an end surface of the top cover (31) away from the lower cylinder (32), and a through hole corresponding to the piston (33) is provided on the fixing cover (2), and the through hole forms the opening end.

5. A torque test device according to claim 4, characterized in that: It also includes a pressure control component, which is used to apply vertical pressure to the lower cylinder (32) from the side of the lower cylinder (32) away from the top cover (31) to change the pressure on the sample during the experiment.

6. A torque test device according to claim 5, characterized in that: The pressure control component comprises an air pump arranged on one side of the base, the air pump is connected to an elastic air bag (5) via an air pipe, and the elastic air bag (5) is arranged below the torque sensor (4).

7. A torque test device according to claim 4, characterized in that: The driving assembly comprises a driving motor (6), wherein the driving motor (6) is fixedly connected to one side of the fixing seat (1), and a driving shaft of the driving motor (6) extends in a vertical direction and is connected to a transmission mechanism, wherein the transmission mechanism can drive the piston (33) to rotate under the drive of the driving motor (6).

8. A torque test device according to claim 7, characterized in that: The transmission mechanism comprises a driving gear (7), which is sleeved on the driving shaft and fixedly connected to the driving shaft; the transmission mechanism also comprises a transmission rod (10), one end of which is fixedly connected to the piston (33), and the other end of which passes through the through hole in a vertical direction and is sleeved with a driven gear (9) coaxial with the through hole, the transmission rod (10) being provided with a third light-through hole coaxial with the first light-through hole, and a transmission belt (8) being sleeved on the outer periphery of the driven gear (9) and the driving gear (7).

9. A torque test device according to claim 8, characterized in that: A deep groove ball bearing (11) is arranged in the through hole, the outer ring of the deep groove ball bearing (11) is fixedly connected to the inner wall of the through hole, and the inner ring of the deep groove ball bearing (11) is sleeved on the transmission rod (10) and fixedly connected to the transmission rod (10).

10. A torque test device according to claim 1, characterized in that: A thrust ball bearing (36) is sleeved on the piston (33), and the thrust ball bearing (36) is located between the top cover (31) and the raised portion. The shaft ring of the thrust ball bearing (36) is fixedly connected to the top cover, and the seat ring of the thrust ball bearing (36) is fixedly connected to the raised portion.

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