Solid-liquid interface frictional resistance measuring device and measuring method thereof

Abstract

The invention provides a solid-liquid interface frictional resistance measuring device and a measuring method thereof. The solid-liquid interface frictional resistance measuring device comprises a supporting suspension, a probe component, an upper liquid rotating component, a displacement sensor and a lifting driving structure. The supporting suspension is provided with a plurality of supporting pieces; the probe part comprises a sample boss and a plurality of flexible hinges, and the sample boss is connected to the lower ends of the plurality of flexible hinges; the upper ends of the multiple flexible hinges are connected to the supporting pieces correspondingly. The upper liquid rotating part is located on the inner sides of the multiple flexible hinges and comprises a dragging motor and a rotating boss, the rotating boss is located above the sample boss, and the rotating boss is arranged at the lower end of the dragging motor and can rotate under driving of the dragging motor; the displacement sensor is correspondingly arranged on the side of at least one flexible hinge and is used for detecting the displacement of the flexible hinge; and the lifting driving structure is used for adjusting the distance between the rotating boss and the sample boss.

Description

Technical Field

[0001] The present application relates to the field of semiconductor technology, and in particular to a solid-liquid interface friction resistance measuring device and a measuring method thereof. Background Art

[0002] The study of frictional resistance at the solid-liquid interface is an essential component of the fundamental theory of fluid mechanics and a key factor in reducing energy losses in fluid transport pipelines in practical applications. It impacts fields such as materials science, chemical engineering, food science, pharmaceuticals, and cosmetics. In long-distance liquid transport and liquid circulation systems, frictional resistance between the fluid and the solid surface leads to significant energy waste and a significant depletion of Earth's resource reserves. Therefore, measuring frictional resistance between fluids and solid surfaces forms the foundation of solid-liquid interface research, attracting considerable attention from scholars both domestically and internationally. Summary of the Invention

[0003] The present invention provides a device for measuring solid-liquid interface friction resistance, comprising:

[0004] a support suspension having a plurality of support members;

[0005] The probe component includes a sample boss and a plurality of flexible hinges, wherein the sample boss is connected to the lower ends of the plurality of flexible hinges; the upper ends of the plurality of flexible hinges are respectively connected to a support member;

[0006] An upper liquid rotating component is located inside the plurality of flexible hinges and includes a drag motor and a rotating boss. The rotating boss is located above the sample boss and is provided at the lower end of the drag motor and can rotate under the drive of the drag motor.

[0007] a displacement sensor, correspondingly disposed on the side of at least one of the flexible hinges, for detecting the displacement of the flexible hinge;

[0008] The lifting drive structure is used to adjust the distance between the rotating boss and the sample boss.

[0009] In some embodiments, the upper liquid rotating component further comprises:

[0010] a leveling device, the leveling device being used to adjust the horizontality of the rotating boss so that the horizontality of the rotating boss is consistent with that of the sample boss;

[0011] The leveling device includes a universal adjustment structure.

[0012] In some embodiments, the plurality of flexible hinges are evenly arranged circumferentially;

[0013] There are three flexible hinges.

[0014] In some embodiments, the probe component further comprises a plurality of columns, which correspond one-to-one to the plurality of flexible hinges, and the sample boss is connected to the lower ends of the plurality of flexible hinges through the plurality of columns; and / or,

[0015] There are multiple displacement sensors, and each displacement sensor is correspondingly arranged on the side of one of the flexible hinges.

[0016] In some embodiments, the solid-liquid interface friction resistance measuring device further comprises:

[0017] There are multiple horizontal translation stages, and each support member is provided with a horizontal translation stage. Each horizontal translation stage can move along the length direction of the support member, and the sample boss can be leveled by adjusting the radial relative positions of the multiple flexible hinges.

[0018] In some embodiments, the rotating boss is connected to the leveling device and the drag motor in a screw connection manner;

[0019] The speed of the traction motor is adjustable, and the speed range of the traction motor is 1 to 3000 rpm.

[0020] In some embodiments, the traction motor has a transmission connecting rod, the leveling device has a leveling connecting rod, and the transmission connecting rod and the leveling connecting rod have the same diameter; and / or,

[0021] The rotating boss and the sample boss have the same thickness; and / or,

[0022] The cross sections of the rotating boss and the sample boss are circular, and the diameter of the rotating boss is larger than that of the sample boss.

[0023] In some embodiments, the flexible hinge, the rotating boss, and the sample boss are all metal parts with a protective layer plated on the surface, and the flexible hinge, the rotating boss, and the sample boss are all prepared by wire cutting;

[0024] The protective layer coated on the surfaces of the flexible hinge, the rotating boss and the sample boss is a DLC coating.

[0025] The present application further provides a method for measuring solid-liquid interface friction resistance, which uses the above-mentioned solid-liquid interface friction resistance measuring device, including:

[0026] The lifting drive structure is used to adjust the interval between the rotating boss and the sample boss to a first distance, and liquid is placed on the sample boss; wherein, when the interval between the rotating boss and the sample boss is adjusted to the first distance, the rotating boss is separated from the liquid placed on the sample boss;

[0027] Applying a preset force to the probe component, measuring the displacement of the flexible hinge under the preset force by the displacement sensor, and determining the stiffness of the probe component according to Hooke's theorem;

[0028] adjusting the distance between the rotating boss and the sample boss to a second distance by lifting the driving structure so that the rotating boss contacts the liquid placed on the sample boss;

[0029] The traction motor is started to rotate at a target speed and runs for a preset time until the liquid laminar flow is stable. The displacement of the flexible hinge within a preset period of time during the liquid laminar flow stabilization phase is measured by the displacement sensor, and the frictional resistance of the liquid at the target speed is calculated according to Hooke's theorem.

[0030] In some embodiments, the second distance is 1 mm.

[0031] In some embodiments, when the solid-liquid interface friction resistance measuring device includes a horizontal displacement stage, before adjusting the interval between the rotating boss and the sample boss to have a first distance by the lifting drive structure, the method further includes: fine-tuning a plurality of the horizontal displacement stages to level the sample boss;

[0032] When the upper liquid rotating component further includes a leveling device, before adjusting the interval between the rotating boss and the sample boss to have the first distance by raising and lowering the driving structure, and after leveling the sample boss, the method further includes:

[0033] The distance between the rotating boss and the sample boss is adjusted by lifting the driving structure so that the gap between the rotating boss and the sample boss returns to zero;

[0034] The leveling device is calibrated to keep the rotating boss and the sample boss at a horizontal angle.

[0035] The main technical effects achieved by the embodiments of the present application are:

[0036] The solid-liquid interface friction resistance measurement device and its measurement method provided in the embodiments of the present application are configured to include a support suspension, a probe component, an upper liquid rotating component, a displacement sensor, and a lifting drive structure. By cooperating with a sample boss at the lower end of the probe component and a rotating boss located above the sample boss, the stiffness of the probe component can be measured in the presence of liquid, and the specific value of the liquid surface friction resistance can be measured and calculated. Furthermore, sufficient contact between the liquid and the solid surface can be ensured, thereby improving the accuracy of the solid-liquid interface friction resistance measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 1 is a front view of a device for measuring solid-liquid interface friction resistance provided by an exemplary embodiment of the present application;

[0038] Figure 2 is a top view of a solid-liquid interface friction resistance measuring device provided by an exemplary embodiment of the present application;

[0039] Figure 3 1 is a schematic diagram of a three-dimensional structure of an assembly structure of a support suspension, a flexible hinge, and a horizontal translation stage provided by an exemplary embodiment of the present application;

[0040] Figure 4 is a schematic three-dimensional structural diagram of a flexible hinge structure provided by an exemplary embodiment of the present application;

[0041] Figure 5 is a schematic diagram of the three-dimensional structure of a probe component provided by an exemplary embodiment of the present application;

[0042] Figure 6 is a bottom view of a probe component provided by an exemplary embodiment of the present application;

[0043] Figure 7 is a front view of an upper liquid rotating component provided by an exemplary embodiment of the present application;

[0044] Figure 8 It is a front view of an assembly structure of a support suspension, a probe component and an upper liquid rotating component provided by an exemplary embodiment of the present application;

[0045] Figure 9 1 is a schematic structural diagram of the relative arrangement of a flexible hinge and a displacement sensor provided by an exemplary embodiment of the present application;

[0046] Figure 10 : is a schematic diagram of the working process of a solid-liquid interface friction resistance measuring device provided by an exemplary embodiment of the present application, wherein: Figure 10 Schematic diagram of part of the solid-liquid interface friction resistance measurement device. DETAILED DESCRIPTION

[0047] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0048] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture; if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for descriptive convenience and should not be understood as indicating or implying relative importance.

[0049] The following is combined with Figures 1 to 10 , some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0050] Please refer to Figure 1 and, if necessary, combine Figures 2 to 10 As shown, a solid-liquid interface friction resistance measuring device is provided, which includes: a support suspension 1, a probe component, an upper liquid rotating component, a displacement sensor 4 and a lifting drive structure.

[0051] The supporting suspension 1 has a plurality of supporting members 102 .

[0052] The probe component includes a plurality of flexible hinges 8 and a sample boss 5 . The sample boss 5 is connected to the lower ends of the plurality of flexible hinges 8 . The upper ends of the plurality of flexible hinges 8 are respectively connected to a support member 102 .

[0053] The upper liquid rotating component is located on the inner side of the multiple flexible hinges 8, and includes a drag motor 9 and a rotating boss 7. The rotating boss 7 is located above the sample boss 5. The rotating boss 7 is provided at the lower end of the drag motor 9 and can rotate under the drive of the drag motor 9.

[0054] The displacement sensor 4 is correspondingly arranged on the side of at least one of the flexible hinges to detect the displacement of the flexible hinge.

[0055] The lifting drive structure is used to adjust the distance between the rotating boss 7 and the sample boss 5 .

[0056] The solid-liquid interface friction resistance measurement device is configured to include a support suspension, a probe assembly, an upper liquid rotating assembly, a displacement sensor 4, and a lifting drive mechanism. By cooperating with a sample boss at the lower end of the probe assembly and a rotating boss located above the sample boss, the stiffness of the probe assembly can be measured in the presence of liquid, and the specific value of the liquid surface friction resistance can be measured and calculated. Furthermore, sufficient contact between the liquid and the solid surface can be ensured, thereby improving the accuracy of the solid-liquid interface friction resistance measurement.

[0057] In some embodiments, the plurality of flexible hinges 8 are evenly arranged circumferentially, which helps to ensure uniform force on the probe component and further improve measurement accuracy.

[0058] Combine Figure 2 and Figure 5 As shown, preferably, there are three flexible hinges 8. The three flexible hinges 8 are evenly arranged in the circumferential direction to ensure the stability of the probe structure, facilitate testing and reduce the application of hinge materials.

[0059] It is understandable that the number of support members 102 of the support suspension 1 may be the same as the number of the flexible hinges 8. The support suspension 1 may be a flying wing suspension.

[0060] In some embodiments, the probe component further includes a plurality of columns 6 , which correspond one-to-one to the plurality of flexible hinges 8 , and the sample boss 5 is connected to the lower ends of the plurality of flexible hinges 8 through the plurality of columns 6 .

[0061] In some embodiments, there are multiple displacement sensors 4, and each displacement sensor 4 is correspondingly arranged on the side of one of the flexible hinges 8, so as to detect the displacement of multiple flexible hinges 8 separately. In this way, the displacement of the 8 flexible hinges can be taken as the average value of the displacement detected by each displacement sensor 4, thereby improving the accuracy of the displacement measurement of the flexible hinge 8, which is conducive to ensuring the accuracy of the friction resistance measurement.

[0062] It is understood that the displacement sensing component 4 is located on the side of the corresponding flexible hinge 8, which can be understood as the displacement sensing component 4 being located on the outside of the corresponding flexible hinge 8, such as the side away from the sample boss 5. Multiple displacement sensors 4 can also be evenly arranged circumferentially.

[0063] Taking the number of the three flexible hinges 8 as an example, there can be correspondingly three displacement sensors 4 , and each displacement sensor 4 is correspondingly arranged on the side of a flexible hinge 8 .

[0064] It is understood that in some embodiments, the position of the displacement sensor 4 is adjustable. The probe component stiffness and the position of the displacement sensor can be adjusted, greatly expanding the volume and type of liquids that can be measured; the use of a flexible hinge increases the stability of the measurement data.

[0065] In some embodiments, the upper liquid rotating component further includes a leveling device 11. The leveling device 11 is used to adjust the level of the rotating boss 7 so that the level of the rotating boss 7 is consistent with that of the sample boss 5.

[0066] The leveling device includes a universal adjustment structure and has a universal adjustment function.

[0067] It should be noted that the drag motor 9 drives the rotating boss 7 to rotate in a horizontal plane.

[0068] It is understandable that in other embodiments, for implementations in which the levelness of the rotating boss 7 is relatively high, the leveling device may not be provided.

[0069] In some embodiments, the solid-liquid interface friction resistance measuring device further includes a plurality of horizontal displacement stages 10 .

[0070] In some embodiments, there are multiple horizontal translation platforms 10, and each support member 102 is provided with a horizontal translation platform 10. Each horizontal translation platform 10 can move along the length direction of the support member 102. By adjusting the radial relative positions of the multiple flexible hinges 8, the sample boss 5 can be leveled so that the upper surface of the sample boss 5 is parallel to the horizontal plane.

[0071] Combine Figure 2 and Figure 3 As shown, the support member 102 is provided with a mounting groove 1101 extending along the length thereof. The horizontal translation stage 10 can be disposed in the mounting groove 1101 and can be moved inward or outward along the length thereof to adjust the radial relative positions between the upper ends of the plurality of flexible hinges 8, thereby leveling the sample boss 5.

[0072] It is understandable that, in some other embodiments, the horizontal translation stage 10 may be provided only on a portion of the support members 102 .

[0073] In some embodiments, the rotating boss 7 is connected to the leveling device 11 and the drag motor 9 in a screw connection manner, that is, they are connected through threaded fitting, which is convenient for connection and setting.

[0074] Combine Figure 7As shown, the traction motor 9 has a transmission connecting rod 91, and the leveling device 11 has leveling connecting rods 111 and 112. The transmission connecting rod 91 and the leveling connecting rod 111 are provided with threaded structures that can cooperate with each other. For example, one end of the transmission connecting rod 91 and the leveling connecting rod 111 is provided with a protrusion and the other end is provided with a groove. The protrusion is provided with an external thread and the groove is provided with an internal thread, and the two are threadedly connected.

[0075] The outer periphery of the lower end of the leveling connecting rod 112 can be provided with an external thread, and the center of the rotating boss 7 can be provided with a matching groove, and the matching groove is provided with an internal thread. The lower end of the leveling connecting rod 112 can be inserted into the matching groove and screwed together through the internal and external threads of the two.

[0076] The diameter of the leveling connecting rod 112 is the same as the diameter of the leveling connecting rod 111 .

[0077] In some embodiments, the transmission connecting rod 91 and the leveling connecting rod 111 have the same diameter. For example, in some embodiments, the transmission connecting rod 91 and the leveling connecting rod 111 both have a diameter of 8 mm. Of course, the diameters of the two can also be other sizes, which can be set according to specific needs.

[0078] It is understandable that the rotating boss 7 can be connected to the leveling device 11 and the driving motor 9 in a screw connection manner or in other ways.

[0079] In some embodiments, the speed of the traction motor 9 is adjustable, and the speed range of the traction motor 9 is 1 to 3000 rpm.

[0080] It is understandable that the rotation speed of the traction motor 9 can be set according to measurement requirements.

[0081] It can be understood that the sample boss 5 and the rotating boss 7 can both be flat plate structures.

[0082] In some embodiments, the rotating boss 7 and the sample boss 5 have the same thickness.

[0083] For example, in some embodiments, the thickness of the rotating boss 7 and the sample boss 5 may be 7 mm.

[0084] In some embodiments, the cross-sections of the rotating boss 7 and the sample boss 5 are circular, and the diameter of the rotating boss 7 is larger than that of the sample boss 5, which is beneficial to ensure the liquid setting area so that the rotating boss 7 and the sample boss 5 can better cooperate.

[0085] For example, in some embodiments, the diameter of the rotating boss 7 is 5 mm larger than the diameter of the sample boss 5 .

[0086] It should be noted that the thickness of the rotating boss 7 and the sample boss 5 , the diameter of the rotating boss 7 and the diameter of the sample boss 5 and other dimensions can be set according to specific needs.

[0087] In some embodiments, the flexible hinge 8 , the rotating boss 7 and the sample boss 5 are all metal parts with a protective layer coated on the surface to ensure the structural performance of the flexible hinge 8 , the rotating boss 7 and the sample boss 5 .

[0088] In some embodiments, the flexible hinge 8, the rotating boss 7 and the sample boss 5 are all prepared by wire cutting, and the preparation process is simple.

[0089] The metal material used for the metal piece can be a metal material that does not undergo physical or chemical reaction with the measured liquid at a temperature of -20°C to 500°C.

[0090] In some embodiments, the protective layer coated on the surface of the flexible hinge 8, the rotating boss 7 and the sample boss 5 is a DLC coating to improve the hardness, wear resistance and corrosion resistance of the flexible hinge 8, the rotating boss 7 and the sample boss 5.

[0091] In some embodiments, the flexible hinge 8, the rotating boss 7 and the sample boss 5 are all structural parts made of aluminum 7072 with a DLC coating on the surface.

[0092] In some embodiments, the lifting drive structure includes a vertical lifting platform 3 and a cubic support 2. The upper end of the cubic support 2 is fixedly connected to the support suspension 1, and the lower end of the cubic support 2 is disposed above the vertical lifting platform 3. Driven by the vertical lifting platform 3, the cubic support 2 can be raised and lowered to adjust the height of the support suspension 1, thereby adjusting the sample boss 5, thereby adjusting the distance between the rotating boss 7 and the sample boss 5.

[0093] It should be noted that, combined with Figure 2 As shown, an opening 101 can be provided in the middle of the support frame. The top end of the drive motor 9 included in the upper liquid rotating component can be fixed by a fixing member extending through the opening. In this way, the distance between the sample boss 5 and the rotating boss 7 can be adjusted as the sample boss 5 is raised and lowered with the support suspension 1. In this embodiment, the height of the upper liquid rotating component is fixed, that is, the height of the rotating boss 7 is fixed. Of course, in other embodiments, the upper liquid rotating component can also be configured to be height-adjustable.

[0094] Accordingly, the horizontal translation stage 10 can move inward along the length direction of the installation slot 1101, which can be understood as moving toward the side close to the opening 101, and the horizontal translation stage 10 can move outward along the length direction of the installation slot 1101, which can be understood as moving away from the opening 101.

[0095] It should be noted that the solid-liquid interface friction resistance measurement provided in this application is suitable for measuring the friction resistance of Newtonian fluids such as lubricating oils and emulsions or non-Newtonian fluids at the interface.

[0096] The present application further provides a method for measuring solid-liquid interface friction resistance. The method can employ the above-mentioned solid-liquid interface friction resistance measuring device. The method can include the following steps S110 to S140.

[0097] In S110, the lifting drive structure adjusts the interval between the rotating boss 7 and the sample boss 5 to a first distance, and liquid is placed on the sample boss 5. When the interval between the rotating boss 7 and the sample boss 5 is adjusted to the first distance, the rotating boss 7 is separated from the liquid placed on the sample boss 5.

[0098] In S120 , a preset force is applied to the probe component, the displacement of the flexible hinge 8 under the preset force is measured by the displacement sensor 4 , and the stiffness of the probe component is determined according to Hooke's theorem.

[0099] In S130 , the distance between the rotating boss 7 and the sample boss 5 is adjusted to a second distance by lifting the driving structure so that the rotating boss 7 contacts the liquid placed on the sample boss 5 .

[0100] In S140, the traction motor 9 is started to rotate at the target speed and runs for a preset time until the liquid laminar flow is stable. The displacement of the flexible hinge 8 within a preset period of time during the liquid laminar flow stabilization stage is measured by the displacement sensor 4, and the friction resistance of the liquid at the target speed is calculated according to Hooke's theorem.

[0101] In some embodiments, the second distance is 1 mm.

[0102] It is understood that the first distance is greater than the second distance. When the second distance is 1 mm, the first distance can be greater than 1 mm, such as 2 mm, 3 mm, 4 mm, etc. The first distance can be determined based on the specific conditions of the liquid being measured to ensure that when the first distance between the rotating boss 7 and the sample boss 5 is adjusted, the rotating boss 7 is separated from the liquid placed on the sample boss 5, thereby preventing the liquid from affecting the stiffness determination accuracy of the probe structure.

[0103] In step S120 , if a preset force F1 is applied to the probe component, and the displacement sensor 4 measures the displacement of the flexible hinge 8 under the preset force as L1 , then according to Hooke's theorem, the stiffness of the probe component k=F / L1 .

[0104] The preset force applied to the probe component can be determined according to specific needs, for example, the preset force can be 5 μN.

[0105] The speed of the drag motor 9 is adjustable, and the speed range of the drag motor 9 is 1 to 3000 rpm. It is understandable that the speed of the drag motor 9 can be set according to measurement requirements.

[0106] In step S140, the target speed can be set as needed, for example, it can be selected as 3000 rpm, 2500 rpm, 2000 rpm, 1500 rpm, 500 rpm, 50 rpm, 1 rpm, etc.

[0107] The preset time length can be adjusted according to the specific circumstances such as the speed of the drag motor 9 and the characteristics of the measured liquid. In some embodiments, the preset time length can be selected from 30S to 120S, such as 30S, 50S, 60S, 70S, 80S, 90S, 100S, 120S, etc.

[0108] The preset time period can also be set as needed. In some embodiments, the preset time period can be selected as 20S-60S. For example, the preset time period can be selected as 20S, 30S, 40S, 50S, 60S, etc.

[0109] For example, in one embodiment, the target speed is selected as 1500 rpm, the preset duration is 1 minute, and the preset period is selected as 30 seconds. In step S140, the drive motor 9 is started to rotate at 1500 rpm for 1 minute until the liquid laminar flow stabilizes. The displacement L2 of the flexible hinge 8 during the 30 seconds of the liquid laminar flow stabilization phase is measured by the displacement sensor 4, and the frictional resistance f=kL2 of the liquid at the target speed of 1500 rpm is calculated according to Hooke's theorem.

[0110] In some embodiments, when the solid-liquid interface friction resistance measuring device includes a horizontal translation stage 10, before adjusting the interval between the rotating boss 7 and the sample boss 5 to have a first distance by the lifting drive structure in step S110, the method further includes the following step S101:

[0111] In step S101 , the plurality of horizontal translation stages 10 are fine-tuned to level the sample boss 5 .

[0112] When the upper liquid rotating component further includes a leveling device 11, before adjusting the interval between the rotating boss 7 and the sample boss 5 to have a first distance by raising and lowering the driving structure in step S110, and after leveling the sample boss 5 in step S101, the method further includes the following steps:

[0113] In step S102 , the distance between the rotating boss 7 and the sample boss 5 is adjusted by lifting the driving structure so that the gap between the rotating boss 7 and the sample boss 5 returns to zero.

[0114] In step S103 , the leveling device 11 is calibrated so that the rotating boss 7 and the sample boss 5 maintain a horizontal angle.

[0115] It should be noted that the lifting drive structure includes a vertical lifting platform 3 and a cubic bracket 2. The upper end of the cubic bracket 2 is fixedly connected to the support suspension 1, and the lower end of the cubic bracket 2 is arranged on the vertical lifting platform 3 and can be raised and lowered under the drive of the vertical lifting platform 3. In the above steps, the distance between the rotating boss 7 and the sample boss 5 is adjusted by the lifting drive structure by driving the vertical lifting platform 3, which drives the cubic bracket 2 to adjust the height of the support suspension 1, and then adjusts the sample boss 5, thereby adjusting the distance between the rotating boss 7 and the sample boss 5.

[0116] It should be noted that compared with the flow pressure difference experiment method, the falling ball in water method and the flow method, the liquid required is greatly reduced. The solid-liquid interface friction resistance measurement device and its measurement method provided in this application have the advantages of saving experimental funds, energy saving and environmental protection.

[0117] The solid-liquid interface friction resistance measurement device and measurement method provided in this application have the characteristics of short measurement time compared with existing devices. The measurement time can even be shortened to 2 minutes to complete the experiment and can be used for measuring liquids with unstable chemical properties.

[0118] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A solid-liquid interface friction resistance measuring device, characterized in that: include: a support suspension having a plurality of support members; The probe component includes a sample boss and a plurality of flexible hinges, wherein the sample boss is connected to the lower ends of the plurality of flexible hinges; the upper ends of the plurality of flexible hinges are respectively connected to a support member; An upper liquid rotating component is located inside the plurality of flexible hinges and includes a drag motor and a rotating boss. The rotating boss is located above the sample boss and is provided at the lower end of the drag motor and can rotate under the drive of the drag motor. a displacement sensor, correspondingly disposed on the side of at least one of the flexible hinges, for detecting the displacement of the flexible hinge; The lifting drive structure is used to adjust the distance between the rotating boss and the sample boss.

2. The solid-liquid interface friction resistance measuring device according to claim 1, characterized in that: The upper liquid rotating component also includes: a leveling device, the leveling device being used to adjust the horizontality of the rotating boss so that the horizontality of the rotating boss is consistent with that of the sample boss; The leveling device includes a universal adjustment structure.

3. The solid-liquid interface friction resistance measuring device according to claim 1, characterized in that: The plurality of flexible hinges are evenly arranged circumferentially; There are three flexible hinges.

4. The solid-liquid interface friction resistance measuring device according to claim 1, characterized in that: The probe component further includes a plurality of columns, which correspond one-to-one to the plurality of flexible hinges, and the sample boss is connected to the lower ends of the plurality of flexible hinges through the plurality of columns; and / or, There are multiple displacement sensors, and each displacement sensor is correspondingly arranged on the side of one of the flexible hinges.

5. The solid-liquid interface friction resistance measuring device according to claim 1, characterized in that: The solid-liquid interface friction resistance measuring device also includes: There are multiple horizontal translation stages, and each support member is provided with a horizontal translation stage. Each horizontal translation stage can move along the length direction of the support member, and the sample boss can be leveled by adjusting the radial relative positions of the multiple flexible hinges.

6. The solid-liquid interface friction resistance measuring device according to claim 2, characterized in that: The rotating boss is connected to the leveling device and the drag motor in a screw connection manner; The speed of the traction motor is adjustable, and the speed range of the traction motor is 1 to 3000 rpm.

7. The solid-liquid interface friction resistance measuring device according to claim 2, characterized in that: The traction motor has a transmission connecting rod, the leveling device has a leveling connecting rod, and the transmission connecting rod and the leveling connecting rod have the same diameter; and / or, The rotating boss and the sample boss have the same thickness; and / or, The cross sections of the rotating boss and the sample boss are circular, and the diameter of the rotating boss is larger than that of the sample boss.

8. The solid-liquid interface friction resistance measuring device according to claim 1, characterized in that: The flexible hinge, rotating boss and sample boss are all metal parts with a protective layer on the surface, and the flexible hinge, rotating boss and sample boss are all prepared by wire cutting; The protective layer coated on the surfaces of the flexible hinge, the rotating boss and the sample boss is a DLC coating.

9. A method for measuring solid-liquid interface friction resistance, characterized in that: The solid-liquid interface friction resistance measurement method uses the solid-liquid interface friction resistance measurement device according to any one of claims 1 to 8, comprising: The lifting drive structure is used to adjust the interval between the rotating boss and the sample boss to a first distance, and liquid is placed on the sample boss; wherein, when the interval between the rotating boss and the sample boss is adjusted to the first distance, the rotating boss is separated from the liquid placed on the sample boss; Applying a preset force to the probe component, measuring the displacement of the flexible hinge under the preset force by the displacement sensor, and determining the stiffness of the probe component according to Hooke's theorem; adjusting the distance between the rotating boss and the sample boss to a second distance by lifting the driving structure so that the rotating boss contacts the liquid placed on the sample boss; The traction motor is started to rotate at a target speed and runs for a preset time until the liquid laminar flow is stable. The displacement of the flexible hinge within a preset period of time during the liquid laminar flow stabilization phase is measured by the displacement sensor, and the frictional resistance of the liquid at the target speed is calculated according to Hooke's theorem.

10. The method for measuring solid-liquid interface friction resistance according to claim 9, wherein: The second distance is 1 mm.

11. The method for measuring solid-liquid interface friction resistance according to claim 9, wherein: When the solid-liquid interface friction resistance measuring device includes a horizontal displacement stage, before adjusting the interval between the rotating boss and the sample boss to have a first distance by the lifting drive structure, the method further includes: fine-tuning the plurality of horizontal displacement stages to level the sample boss; When the upper liquid rotating component further includes a leveling device, before adjusting the interval between the rotating boss and the sample boss to have the first distance by raising and lowering the driving structure, and after leveling the sample boss, the method further includes: The distance between the rotating boss and the sample boss is adjusted by lifting the driving structure so that the gap between the rotating boss and the sample boss returns to zero; The leveling device is calibrated to keep the rotating boss and the sample boss at a horizontal angle.

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