Retention force analysis device based on centrifugal force test
Through the coupling transmission and automatic cleaning system between the closed-loop servo motor and the planetary reducer, the vibration and liquid residue problems of the inclined contact angle measuring instrument are solved, the measurement accuracy and efficiency are improved, and multiple test functions are realized.
Patent Information
- Application Number
- CN202510631447.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-08-15
AI Technical Summary
The existing inclined contact angle measuring instruments have repetitive errors caused by transmission backlash and mechanical vibration affecting measurement accuracy. After the liquid is injected, the residual liquid needs to be manually cleaned, which will extend the detection time and may cause liquid mixing, affecting the test results.
The coupled transmission of a closed-loop servo motor and a planetary reducer is adopted, and a dynamic balance compensation system is built with the bearing to reduce vibration. The integrated measurement platform realizes multiple testing functions; the injection components and cleaning components are designed to automatically clean the residual liquid in the injection tube, and the rapid liquid conversion is achieved through closed blocks and water-absorbing blocks.
It reduces equipment vibration, improves measurement accuracy and efficiency, reduces manual cleaning time, avoids the influence of liquid mixing, and realizes a number of test functions such as static/dynamic contact angle, rolling angle, and retention force.
Smart Images
Figure CN120489861A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of retention force analysis devices, in particular to a retention force analysis device based on centrifugal force testing. Background Art
[0002] Optical retention force measuring instruments are widely used in the study of material wettability, especially in the fields of special functional materials, liquid transmission and filtration processes, surface self-cleaning and easy cleaning. By analyzing the relationship between retention force and dynamic contact angle, we can further study the droplet fluid dynamics and wetting characteristics of materials.
[0003] The inclined contact angle meters currently on the market generally use open-loop stepper motors combined with gear transmission devices, which have repeatability errors caused by transmission backlash; secondly, due to mechanical structure limitations, the gear transmission system is prone to slight mechanical vibrations during dynamic measurements, and a high-strength alloy frame must be configured to compensate for rigidity. This not only significantly increases the cost of the equipment, but it is still difficult to completely eliminate the image jitter problem during high-frequency sampling. Moreover, after the liquid is injected, when the next test is conducted, if a different liquid is to be tested, the residual liquid in the injection assembly needs to be cleaned, thereby extending the test time. Manual cleaning cannot guarantee that the residual liquid in the cleaning tube is completely cleaned, and the residual liquid will mix with the new liquid, resulting in an impact on the retention force of the new liquid. Summary of the Invention
[0004] The object of the present invention is to provide a retention force analysis device based on centrifugal force testing to solve the problems raised in the prior art.
[0005] To achieve the above object, the present invention provides the following technical solutions: A retention force analysis device based on centrifugal force testing, the analysis device includes a centrifugal rotating component, a high-speed shooting component and a light source component. A base plate is provided at the bottom end of the centrifugal rotating component, and the base plate is placed on a horizontal foundation. A high-speed shooting component is provided at one end of the base plate, and a light source component is provided at the other end of the base plate. A table assembly is provided at the top of the centrifugal rotating component, and the centrifugal rotating component is used to reduce the jitter caused by rotation. An injection component is provided on the centrifugal rotating component, and a cleaning component is provided on the injection component, and the cleaning component is used to clean the liquid in the injection component.
[0006] Specifically, the analysis device is used to test the centrifugal force of the medium on the rotating table. The inclined contact angle measuring instruments currently on the market generally use an open-loop stepper motor combined with a gear transmission device, which has repeatability errors caused by transmission backlash. Secondly, due to mechanical structure limitations, the gear transmission system is prone to slight mechanical vibration during dynamic measurement, and a high-strength alloy frame must be configured to compensate for rigidity. This not only significantly increases the cost of the equipment, but also remains difficult to completely eliminate the image jitter problem during high-frequency sampling. Moreover, after the liquid is injected, if a different liquid is to be tested for the next test, the residual liquid in the injection assembly must be cleaned, which prolongs the test time. Moreover, manual cleaning cannot guarantee the complete removal of the residual liquid in the cleaning tube. The residual liquid will then mix with the new liquid, affecting the retention force of the new liquid. The centrifugal rotating assembly is used to control the rotation of the table assembly so that the liquid on the table assembly can be affected by centrifugal force. The high-speed camera assembly is used to take pictures of the liquid on the table assembly. The table assembly is used to place the liquid. The injection assembly is located directly above the table assembly for dripping the liquid. The cleaning assembly is used to clean the residual liquid in the injection tube.
[0007] The centrifugal rotating assembly includes an outer shell and a closed-loop servo motor. The bottom end of the outer shell is located in the middle of the base plate. The closed-loop servo motor is located inside the outer shell. A planetary reducer is provided at the output end of the closed-loop servo motor. A close-fitting bearing is provided at the top end of the planetary reducer. The output end of the planetary reducer is matched with the close-fitting bearing.
[0008] Specifically, the closed-loop servo motor is used as the power source. Through the coupled transmission of the closed-loop servo motor and the planetary reducer, and the dynamic balance compensation system constructed with the bearing, the centrifugal force rotation module can avoid the impact of vibration on the test accuracy during low-speed rotation. Compared with the traditional gear transmission solution, the vibration is greatly reduced, and the dependence on high-rigidity alloy frames is eliminated. The integrated measurement platform realizes multiple test functions such as static / dynamic contact angle, forward / backward angle, rolling angle, retention force, and friction coefficient analysis. A close-fitting bearing is provided on the top of the planetary reducer, and the planetary reducer is matched with the close-fitting bearing. A built-in sensor is provided in the middle of the close-fitting bearing. During the test, the built-in sensor is automatically triggered for high-speed shooting every time the turntable rotates one circle.
[0009] The injection assembly includes a first support plate, the bottom end of the first support plate is fixedly connected to the base plate, a fixed plate is provided at the top of the first support plate, a clamp is provided at the bottom end of the fixed plate, an injection tube is provided at the fixed end of the clamp, and the output end of the injection tube faces the table assembly.
[0010] Specifically, the injection assembly is used to fix the injection tube and control the axial movement of the injection tube. The bottom end of the first support plate is fixedly connected to the upper surface of the base plate. There are two first support plates, and fixed plates are provided at both ends of the two first support plates. The fixed plate at the bottom is used to increase the contact surface between the two first support plates and the base plate, thereby improving stability. The fixed plate at the top is used to install the clamping member, and the bottom of the clamping member is used to fix the injection tube. The bottom end of the injection tube is the output end, and the top end is the input end, which is sealed by the cover plate, and a through hole is opened on the cover plate, which is connected to the external hose for providing new liquid. A fixed block is provided in the middle of the clamping member, and a driving member is provided at the top of the clamping member. The driving member, the fixed block and the injection tube are on the same central axis.
[0011] The cleaning component includes a pushing motor, a threaded rod, a water absorbent block, a slider and a disc. The pushing motor is located on the top of the clamping part. The fixed end of the pushing motor is fixedly connected to the clamping part. The output end of the pushing motor faces the injection tube. The output end of the pushing motor is provided with a threaded rod. The middle of the slider is hollow. The outer wall of the slider fits with the inner wall of the injection tube. The disc is fixedly connected to one end of the threaded rod. The other end of the threaded rod is rotatably connected to the output end of the pushing motor. A water absorbent block is provided at the edge end of the disc.
[0012] Specifically, the pushing motor is used as a power source to control the movement of the threaded rod. The pushing motor drives the threaded rod to move, and the movement of the threaded rod drives the disc to move, so that the disc contacts the slider. Because the middle of the slider is hollow, a closed block will be formed when the two contact each other. Then, under the push of the pushing motor, the closed block will move together and squeeze the liquid close to one end of the injection tube to discharge. When the liquid inside the injection tube is discharged, due to the characteristics of the liquid, there will be residual liquid attached to the inner wall of the injection tube. If it is not cleaned, it will mix with the subsequent liquid. If it is a different liquid, it will cause irreversible effects during subsequent liquid detection. Therefore, when the pushing motor is working, it drives the disc to move, and the disc drives the slider to move. The water-absorbing block inside the outer wall of the slider will clean the liquid on the inner wall of the injection tube.
[0013] The bottom diameter of the disc is larger than the top diameter. The bottom of the disc cooperates with the slider. A connecting rod is provided between the disc and the slider. One end of the connecting rod is rotatably connected to the inner wall of the slider, and the other end of the connecting rod is slidably connected to the bottom end of the disc. A fixed block is provided on the top of the injection tube, one end of the fixed block is fixedly connected to the clamping member, a threaded groove is provided in the middle of the fixed block, the threaded rod passes through the fixed block, the threaded groove is threadedly engaged with the threaded rod, a rotating block is provided on the inner wall of the water absorption block, a connecting block is provided on the inner wall of the rotating block, one end of the connecting block is fixedly connected to the inner wall of the rotating block, and the other end of the connecting block is fixedly connected to the connecting rod.
[0014] Specifically, because the diameter of the bottom end of the disc is larger than the diameter of the top end, when the bottom end of the disc is separated from the slider, it is related to the height of the slider. The higher the height, the larger the separation space required for the two, resulting in a longer separation time. The slider is connected to the disc by a connecting rod, and when the disc moves upward, it will drive the slider to move together. Its fixed block is located between the pushing motor and the injection tube, and the three are on the same central axis. The pushing motor pushes the threaded rod to move downward. Because the threaded rod is rotatably connected to the output end of the rotating motor, the threaded rod body cooperates with the threaded groove in the middle of the fixed block, and then under the push of the rotating motor and the restriction of the fixed block, the threaded rod will rotate. The rotation of the threaded rod will drive the disc to rotate. The rotation of the disc will drive one end of the connecting rod to move, and the other end of the connecting rod will rotate with the connecting block. The connecting block will drive the water absorption block to rotate, so that during the extrusion process, the water absorption block will also start to rotate.
[0015] The table assembly includes a placement tray and a sample pressing block. The bottom end of the placement tray is rotatably connected to the outer shell, and the middle of the bottom end of the placement tray is fixedly connected to a tight bearing. The sample pressing block is located on the upper surface of the placement tray, and one end of the sample pressing block is rotatably connected to the placement tray. A transparent shell is provided at the bottom end of the placement tray, and the transparent shell is fixedly connected to the placement tray.
[0016] Specifically, the placement plate is circular, the output end of the injection tube is aligned with the central axis of the placement plate, the sample pressure block is used to fix the test sample so that it cannot move, and the transparent shell is used to allow direct observation of the internal mechanical operating status, liquid flow or reaction process, which is convenient for real-time monitoring of faults or abnormalities and prevents external factors from affecting the liquid during the detection process.
[0017] The high-speed shooting component includes a high-speed camera, camera angle adjustment, camera left and right adjustment, camera lifting adjustment and a second support plate. The second support plate is located at the end of the base plate away from the second support plate. The bottom end of the second support plate is fixedly connected to the base plate. The top of the second support plate is provided with a camera lifting adjustment. The top of the camera lifting adjustment is provided with a camera left and right adjustment. The top of the camera left and right adjustment is provided with a camera angle adjustment. The top of the camera angle adjustment is provided with a high-speed camera. The high-speed camera outer cover is provided with a protective shell, and the protective shell is fixedly connected to the outer wall of the high-speed camera.
[0018] Specifically, the overall height of the second support plate is lower than the overall height of the first support plate, and is used to place the high-speed camera at the horizontal line of the placement plate. The camera lifting adjustment is used to adjust the overall horizontal height of the high-speed camera. The camera left and right adjustment is used to control the left and right steering of the high-speed camera. The camera angle adjustment is used to control the tilt angle of the high-speed camera. The protective case is used to prevent the equipment from being damaged due to mechanical shock, vibration or accidental falling.
[0019] Two sealing rings are provided on the slider.
[0020] Specifically, the sealing ring is used to prevent the liquid from leaking from the space on one side of the slider to the space on the other side to prevent the mixing of two different liquids. Two sealing rings are provided, with the first and the second being located at the upper and lower ends of the rotating block respectively.
[0021] The outer wall of the water-absorbing block is made of graphite, and the inner wall of the water-absorbing block is made of sponge.
[0022] Specifically, the graphite is located in the water absorption block close to the inner wall of the injection tube. Graphite is a low-friction material and will not cause excessive friction to the inner wall of the injection tube during movement. The sponge material is located in the water absorption block away from the inner wall of the injection tube. The sponge is a highly absorbent material and is mainly used to absorb liquid.
[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. When the motor of the present invention is working, it pushes the disc to move, so that the disc contacts the slider. Because the middle of the slider is hollow, a closed block will be formed when the two contact each other. The disc pushes the slider to move. Not only will the closed block squeeze the liquid, but the water-absorbing block inside the outer wall of the slider will clean the liquid on the inner wall of the injection tube. The rotation of the threaded rod will drive the disc to rotate, and the rotation of the disc will drive the connecting rod to move. The connecting rod drives the rotating block to rotate, and finally the rotating block drives the water-absorbing block to rotate, thereby improving the cleaning efficiency.
[0024] 2. When the driving motor of the present invention pushes, the disc and the slider come into contact. When the two come into contact, a closed block is formed. Then, under the push of the driving motor, the closed block moves together and squeezes the liquid close to one end of the injection tube to discharge it. When the liquid inside the injection tube is discharged, the other end will not come into contact with the liquid at the output end due to the closed block. Then, when the driving motor retracts, it will drive the disc to move back, separating the disc from the slider, and then the liquid at the input end will enter the output end through the gap, realizing rapid conversion of the liquid.
[0025] 3. The present invention uses a coupled transmission between a closed-loop servo motor and a planetary reducer, combined with a dynamic balance compensation system constructed with bearings, to prevent the centrifugal force rotation module from vibrating and affecting test accuracy during low-speed rotation, thereby eliminating dependence on a high-rigidity alloy frame. The integrated measurement platform enables multiple test functions such as static / dynamic contact angle, forward / reverse angle, rolling angle, retention force, and friction coefficient analysis. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 Schematic diagram of the structure of the high-speed camera of the present invention; Figure 3 This is a structural diagram of the camera angle adjustment of the present invention; Figure 4 It is a structural schematic diagram of the centrifugal rotating assembly of the present invention; Figure 5 It is a structural schematic diagram of the injection assembly of the present invention; Figure 6 It is a structural schematic diagram of the cleaning component of the present invention; Figure 7 It is a structural schematic diagram of the fixing block of the present invention; Figure 8 It is a structural schematic diagram of the disc of the present invention; Figure 9 It is a structural schematic diagram of the slider of the present invention; Figure 10 It is a structural schematic diagram of the rotating block of the present invention.
[0027] In the figure: 1. Centrifugal rotating assembly; 11. Outer shell; 12. Closed-loop servo motor; 13. Planetary reducer; 14. Tight bearing; 2. High-speed shooting assembly; 21. High-speed camera; 22. Camera angle adjustment; 23. Camera left and right adjustment; 24. Camera lifting adjustment; 25. Second support plate; 26. Protective shell; 3. Light source assembly; 4. Table assembly; 41. Placement plate; 42. Sample pressing block; 43. Transparent shell; 5. Injection assembly; 51. First support plate; 52. Fixed plate; 53. Clamping part; 54. Injection tube; 6. Cleaning assembly; 61. Push motor; 62. Threaded rod; 63. Water absorption block; 64. Slider; 65. Disc; 66. Connecting rod; 67. Fixed block; 68. Rotating block; 69. Connecting block; 7. Sealing ring; 8. Bottom plate. DETAILED DESCRIPTION
[0028] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.
[0029] Example: Figures 1 to 10 As shown, the present invention provides a technical solution of a retention force analysis device based on centrifugal force testing, the analysis device includes a centrifugal rotating component 1, a high-speed shooting component 2 and a light source component 3. The bottom end of the centrifugal rotating component 1 is provided with a base plate 8, the base plate 8 is placed on a horizontal foundation, one end of the base plate 8 is provided with a high-speed shooting component 2, the other end of the base plate 8 is provided with a light source component 3, the top of the centrifugal rotating component 1 is provided with a table component 4, the centrifugal rotating component 1 is used to reduce the jitter caused by rotation, the centrifugal rotating component 1 is provided with an injection component 5, the injection component 5 is provided with a cleaning component 6, the cleaning component 6 is used to clean the liquid in the injection component 5.
[0030] Specifically, the analysis device is used to measure the centrifugal force of the medium on the rotating table. Currently, the tilt-type contact angle measuring instruments on the market generally use an open-loop stepper motor combined with a gear transmission device, which has repeatability errors caused by transmission backlash. Secondly, due to mechanical structure limitations, the gear transmission system is prone to slight mechanical vibration during dynamic measurement, requiring a high-strength alloy frame to compensate for rigidity. This not only significantly increases the cost of the equipment, but also remains difficult to completely eliminate the image jitter problem during high-frequency sampling. Moreover, after the liquid is injected, if a different liquid is to be tested for the next test, the residual liquid in the injection assembly 5 needs to be cleaned, which prolongs the test time. Moreover, manual cleaning cannot guarantee the complete removal of the residual liquid in the cleaning tube. The residual liquid will mix with the new liquid, resulting in an impact on the retention force of the new liquid. The centrifugal rotating assembly 1 is used to control the rotation of the table assembly 4 so that the liquid on the table assembly 4 can be affected by centrifugal force. The high-speed imaging assembly 2 is used to take pictures of the liquid on the table assembly 4. The table assembly 4 is used to place the liquid. The injection assembly 5 is located directly above the table assembly 4 for dripping the liquid. The cleaning assembly 6 is used to clean the residual liquid in the injection tube 54.
[0031] like Figure 4 As shown, the centrifugal rotating assembly 1 includes an outer shell 11 and a closed-loop servo motor 12. The bottom end of the outer shell 11 is located in the middle of the bottom plate 8. The closed-loop servo motor 12 is located in the outer shell 11. The output end of the closed-loop servo motor 12 is provided with a planetary reducer 13. The top end of the planetary reducer 13 is provided with a tight bearing 14. The output end of the planetary reducer 13 cooperates with the tight bearing 14.
[0032] Specifically, the closed-loop servo motor 12 is used as a power source for power. Through the coupling transmission of the closed-loop servo motor 12 and the planetary reducer 13, and the dynamic balance compensation system constructed with the bearing, the centrifugal force rotation module can avoid the impact of vibration on the test accuracy during low-speed rotation. Compared with the traditional gear transmission scheme, the vibration is greatly reduced, and the dependence on the high-rigidity alloy frame is eliminated. The integrated measurement platform realizes multiple test functions such as static / dynamic contact angle, forward / backward angle, rolling angle, retention force, and friction coefficient analysis. A tight bearing 14 is provided at the top of the planetary reducer 13, and the planetary reducer 13 is matched with the tight bearing 14. A built-in sensor is provided in the middle of the tight bearing 14. During the test, the built-in sensor is automatically triggered for high-speed shooting every time the turntable rotates one circle.
[0033] like Figure 5 As shown, the injection assembly 5 includes a first support plate 51, the bottom end of the first support plate 51 is fixedly connected to the base plate 8, a fixing plate 52 is provided at the top of the first support plate 51, a clamping member 53 is provided at the bottom end of the fixing plate 52, an injection tube 54 is provided at the fixed end of the clamping member 53, and the output end of the injection tube 54 faces the table assembly 4.
[0034] Specifically, the injection assembly 5 is used to fix the injection tube 54 and control the axial movement of the injection tube 54. The bottom end of the first support plate 51 is fixedly connected to the upper surface of the base plate 8. There are two first support plates 51. Fixed plates are provided at both ends of the two first support plates 51. The fixed plate at the bottom is used to increase the contact surface between the two first support plates 51 and the base plate 8, thereby improving stability. The fixed plate 52 at the top is used to install the clamp 53. The bottom of the clamp 53 is used to fix the injection tube 54. The bottom end of the injection tube 54 is the output end, and the top end is the input end. It is sealed by a cover plate, and a through hole is opened on the cover plate. The through hole is connected to the external hose for providing new liquid. A fixed block 67 is provided in the middle of the clamp 53, and a driving member is provided at the top of the clamp 53. The driving member, the fixed block 67 and the injection tube 54 are on the same central axis.
[0035] like Figures 5 to 8 As shown, the cleaning assembly 6 includes a pushing motor 61, a threaded rod 62, a water absorption block 63, a slider 64 and a disc 65. The pushing motor 61 is located at the top of the clamping member 53, and the fixed end of the pushing motor 61 is fixedly connected to the clamping member 53. The output end of the pushing motor 61 faces the injection tube 54. The output end of the pushing motor 61 is provided with a threaded rod 62, the middle of the slider 64 is hollow, the outer wall of the slider 64 fits with the inner wall of the injection tube 54, the disc 65 is fixedly connected to one end of the threaded rod 62, and the other end of the threaded rod 62 is rotatably connected to the output end of the pushing motor 61. The edge end of the disc 65 is provided with a water absorption block 63.
[0036] Specifically, the pushing motor 61 is used as a power source to control the movement of the threaded rod 62. The pushing motor 61 works to push the threaded rod 62 to move, and the movement of the threaded rod 62 pushes the disc 65 to move, so that the disc 65 contacts the slider 64. Because the slider 64 is hollow in the middle, when the two contact, a closed block will be formed. Then, under the push of the pushing motor 61, the closed block will move together and squeeze the liquid close to one end of the injection tube 54 to discharge. When the liquid inside the injection tube 54 is discharged, due to the characteristics of the liquid, there will be residual liquid attached to the inner wall of the injection tube 54. If it is not cleaned, it will mix with the subsequent liquid. If it is a different liquid, it will cause irreversible effects during subsequent liquid detection. Therefore, when the pushing motor 61 is working, the pushing disc 65 moves, and the disc 65 pushes the slider 64 to move. The water absorption block 63 inside the outer wall of the slider 64 will clean the liquid on the inner wall of the injection tube 54.
[0037] like Figures 5 to 10As shown, the bottom diameter of the disk 65 is larger than the top diameter, the bottom of the disk 65 cooperates with the slider 64, and a connecting rod 66 is provided between the disk 65 and the slider 64. One end of the connecting rod 66 is rotatably connected to the inner wall of the slider 64, and the other end of the connecting rod 66 is slidably connected to the bottom end of the disk 65. A fixed block 67 is provided at the top of the injection tube 54, one end of the fixed block 67 is fixedly connected to the clamping member 53, a threaded groove is provided in the middle of the fixed block 67, the threaded rod 62 passes through the fixed block 67, and the threaded groove is threadedly engaged with the threaded rod 62. A rotating block 68 is provided on the inner wall of the water absorption block 63, and a connecting block 69 is provided on the inner wall of the rotating block 68. One end of the connecting block 69 is fixedly connected to the inner wall of the rotating block 68, and the other end of the connecting block 69 is fixedly connected to the connecting rod 66.
[0038] Specifically, because the diameter of the bottom end of the disc 65 is larger than the diameter of the top end, when the bottom end of the disc 65 is separated from the slider 64, it is related to the height of the slider 64. The higher the height, the larger the separation space required for the two, resulting in a longer separation time. The slider 64 is connected to the disc 65 by a connecting rod 66, and when the disc 65 moves upward, it will drive the slider 64 to move together. Its fixed block 67 is located between the driving motor 61 and the injection tube 54. The three are on the same central axis. The driving motor 61 drives the threaded rod 62 It moves downward, and because the threaded rod 62 is rotatably connected to the output end of the rotating motor, the rod body of the threaded rod 62 cooperates with the threaded groove in the middle of the fixed block 67, and then under the push of the rotating motor and the restriction of the fixed block 67, the threaded rod 62 will rotate, and the rotation of the threaded rod 62 will drive the disc 65 to rotate, and the rotation of the disc 65 will drive one end of the connecting rod 66 to move, and the other end of the connecting rod 66 will drive the connecting block 69 to rotate, and the connecting block 69 will drive the water absorbing block 63 to rotate, so that during the extrusion process, the water absorbing block 63 will also start to rotate.
[0039] like Figures 1 to 10 As shown, the table assembly 4 includes a placement tray 41 and a sample pressing block 42. The bottom end of the placement tray 41 is rotatably connected to the outer shell 11, and the middle of the bottom end of the placement tray 41 is fixedly connected to the tight bearing 14. The sample pressing block 42 is located on the upper surface of the placement tray 41, and one end of the sample pressing block 42 is rotatably connected to the placement tray 41. A transparent shell 43 is provided at the bottom end of the placement tray 41, and the transparent shell 43 is fixedly connected to the placement tray 41.
[0040] Specifically, the placement plate 41 is circular, the output end of the injection tube 54 is aligned with the central axis of the placement plate 41, the sample pressing block 42 is used to fix the test sample so that it cannot move, and the transparent shell 43 is used to allow direct observation of the internal mechanical operation status, liquid flow or reaction process, which is convenient for real-time monitoring of faults or abnormalities and prevents external factors from affecting the liquid during the detection process.
[0041] like Figure 2 、 Figure 3As shown, the high-speed shooting component 2 includes a high-speed camera 21, a camera angle adjustment 22, a camera left and right adjustment 23, a camera lifting adjustment 24 and a second support plate 25. The second support plate 25 is located at the end of the base plate 8 away from the second support plate 25. The bottom end of the second support plate 25 is fixedly connected to the base plate 8. The top of the second support plate 25 is provided with a camera lifting adjustment 24. The top of the camera lifting adjustment 24 is provided with a camera left and right adjustment 23. The top of the camera left and right adjustment 23 is provided with a camera angle adjustment 22. The top of the camera angle adjustment 22 is provided with a high-speed camera 21. The outer cover of the high-speed camera 21 is provided with a protective shell 26, and the protective shell 26 is fixedly connected to the outer wall of the high-speed camera 21.
[0042] Specifically, the overall height of the second support plate 25 is lower than the overall height of the first support plate 51, and is used to place the high-speed camera 21 at the horizontal line of the placement plate 41. The camera lifting adjustment 24 is used to adjust the overall horizontal height of the high-speed camera 21. The camera left and right adjustment 23 is used to control the left and right steering of the high-speed camera 21. The camera angle adjustment 22 is used to control the tilt angle of the high-speed camera 21. The protective shell 26 is used to prevent the equipment from being damaged due to mechanical shock, vibration or accidental falling.
[0043] like Figure 10 As shown, two sealing rings 69 are provided on the slider 64 .
[0044] Specifically, the sealing ring 69 is used to prevent the liquid from leaking from the space on one side of the slider 64 to the space on the other side to prevent the mixing of two different liquids. There are two sealing rings 69, with the first and second sealing rings being located at the upper and lower ends of the rotating block 68 respectively.
[0045] like Figure 10 As shown, the outer wall of the water absorbing block 63 is made of graphite material, and the inner wall of the water absorbing block 63 is made of sponge material.
[0046] Specifically, the graphite is located in the water absorption block 63 close to the inner wall of the injection tube 54. Graphite is a low-friction material and will not cause excessive friction to the inner wall of the injection tube 54 during movement. The sponge material is located in the water absorption block 63 away from the inner wall of the injection tube 54. The sponge is a highly absorbent material and is mainly used to absorb liquid.
[0047] Working principle: First, use the automatic slide to automatically move the centrifugal rotating component to the rotation radius position that needs to be tested, and the movement method can be adjusted on the software; then place the test sample on the turntable, and then use the sample pressing block 42 to fix the test sample so that it cannot move; the injection component 5 drips out a set amount of droplets, and then the injection component 5 drops the droplets to the surface of the test sample; then, during the liquid dripping period, the driving motor 61 works to drive the threaded rod 62 to move, and the movement of the threaded rod 62 drives the disc 65 to move, so that the disc 65 contacts the slider 64. Because the slider 64 is hollow in the middle, when the two contact, a closed block will be formed, and then, under the drive of the driving motor 61, the closed block will move together and squeeze the liquid close to one end of the injection tube 54 to discharge. When the liquid inside the injection tube 54 is discharged, the other end will not contact the liquid at the output end due to the sealing block. When the motor 61 is pushed to retract, the disc 65 will be driven to move back, so that the disc 65 is separated from the slider 64, and then the liquid at the input end will enter the output end through the gap, realizing rapid conversion of the liquid. During the dripping of the liquid, the disc 65 is pushed to move, and the disc 65 pushes the slider 64 to move. The water-absorbing block 63 on the outer wall of the slider 64 will clean the liquid on the inner wall of the injection tube 54. After the liquid is dripped, the test needs to be started through the software. During the test, the built-in sensor is automatically triggered for high-speed shooting every time the turntable rotates one circle. The captured image is then automatically analyzed by the contact angle measurement software to obtain data such as the dynamic contact angle, retention force, friction coefficient, etc. of the droplet on the product surface.
[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A retention force analysis device based on centrifugal force testing, characterized in that: The analysis device comprises a centrifugal rotating assembly (1), a high-speed shooting assembly (2) and a light source assembly (3); a bottom plate (8) is provided at the bottom end of the centrifugal rotating assembly (1); the bottom plate (8) is placed on a horizontal foundation; a high-speed shooting assembly (2) is provided at one end of the bottom plate (8); a light source assembly (3) is provided at the other end of the bottom plate (8); a table assembly (4) is provided at the top end of the centrifugal rotating assembly (1); the centrifugal rotating assembly (1) is used to reduce vibration caused by rotation; an injection assembly (5) is provided on the centrifugal rotating assembly (1); a cleaning assembly (6) is provided on the injection assembly (5); the cleaning assembly (6) is used to clean the liquid in the injection assembly (5).
2. The retention force analysis device based on centrifugal force testing according to claim 1, characterized in that: The centrifugal rotating assembly (1) comprises an outer shell (11) and a closed-loop servo motor (12). The bottom end of the outer shell (11) is located in the middle of the bottom plate (8). The closed-loop servo motor (12) is located inside the outer shell (11). A planetary reducer (13) is provided at the output end of the closed-loop servo motor (12). A tight bearing (14) is provided at the top end of the planetary reducer (13). The output end of the planetary reducer (13) is matched with the tight bearing (14).
3. The retention force analysis device based on centrifugal force testing according to claim 2, characterized in that: The injection assembly (5) comprises a first support plate (51), the bottom end of the first support plate (51) is fixedly connected to the bottom plate (8), a fixing plate (52) is provided at the top end of the first support plate (51), a clamping member (53) is provided at the bottom end of the fixing plate (52), an injection tube (54) is provided at the fixed end of the clamping member (53), and the output end of the injection tube (54) faces the table assembly (4).
4. The retention force analysis device based on centrifugal force testing according to claim 3, characterized in that: The cleaning assembly (6) includes a driving motor (61), a threaded rod (62), a water absorbing block (63), a slider (64) and a disc (65), wherein the driving motor (61) is located at the top of the clamping member (53), the fixed end of the driving motor (61) is fixedly connected to the clamping member (53), the output end of the driving motor (61) faces the injection tube (54), the output end of the driving motor (61) is provided with a threaded rod (62), the middle of the slider (64) is hollowed out, the outer wall of the slider (64) is in contact with the inner wall of the injection tube (54), the disc (65) is fixedly connected to one end of the threaded rod (62), the other end of the threaded rod (62) is rotatably connected to the output end of the driving motor (61), and the edge end of the disc (65) is provided with a water absorbing block (63).
5. The retention force analysis device based on centrifugal force testing according to claim 4, characterized in that: The bottom diameter of the disk (65) is larger than the top diameter. The bottom of the disk (65) cooperates with the slider (64). A connecting rod (66) is provided between the disk (65) and the slider (64). One end of the connecting rod (66) is rotatably connected to the inner wall of the slider (64). The other end of the connecting rod (66) is slidably connected to the bottom end of the disk (65). A fixed block (67) is provided at the top of the injection tube (54). One end of the fixed block (67) is fixedly connected to the clamping member (53). A threaded groove is provided in the middle of the fixed block (67). The threaded rod (62) passes through the fixed block (67). The threaded groove is threadedly engaged with the threaded rod (62). A rotating block (68) is provided on the inner wall of the water absorbing block (63). A connecting block (69) is provided on the inner wall of the rotating block (68). One end of the connecting block (69) is fixedly connected to the inner wall of the rotating block (68). The other end of the connecting block (69) is fixedly connected to the connecting rod (66).
6. The retention force analysis device based on centrifugal force testing according to claim 5, characterized in that: The table assembly (4) includes a placement plate (41) and a sample pressing block (42). The bottom end of the placement plate (41) is rotatably connected to the outer shell (11). The middle of the bottom end of the placement plate (41) is fixedly connected to the tight bearing (14). The sample pressing block (42) is located on the upper surface of the placement plate (41). One end of the sample pressing block (42) is rotatably connected to the placement plate (41). A transparent shell (43) is provided at the bottom end of the placement plate (41), and the transparent shell (43) is fixedly connected to the placement plate (41).
7. The retention force analysis device based on centrifugal force testing according to claim 6, characterized in that: The high-speed shooting assembly (2) includes a high-speed camera (21), a camera angle adjustment (22), a camera left-right adjustment (23), a camera lifting adjustment (24) and a second support plate (25), wherein the second support plate (25) is located at one end of the bottom plate (8) away from the second support plate (25), and the bottom end of the second support plate (25) is fixedly connected to the bottom plate (8). The top end of the second support plate (25) is provided with a camera lifting adjustment (24), the top end of the camera lifting adjustment (24) is provided with a camera left-right adjustment (23), the top end of the camera left-right adjustment (23) is provided with a camera angle adjustment (22), the top end of the camera angle adjustment (22) is provided with a high-speed camera (21), and the outer cover of the high-speed camera (21) is provided with a protective shell (26), and the protective shell (26) is fixedly connected to the outer wall of the high-speed camera (21).
8. The retention force analysis device based on centrifugal force testing according to claim 7, characterized in that: Two sealing rings (7) are provided on the slider (64).
9. The retention force analysis device based on centrifugal force testing according to claim 8, characterized in that: The outer wall of the water absorbing block (63) is made of graphite material, and the inner wall of the water absorbing block (63) is made of sponge material.