Centrifugal particle surface adhesion energy measuring device, system and method based on synchronous belt transmission

Abstract

The application discloses a centrifugal particle surface adhesion energy measuring device based on synchronous belt transmission, which comprises a sample loading table, a base, a transparent cover, a bottom disc, a first synchronous belt pulley, a bearing, a base plate, a fastening shaft, a second synchronous belt pulley, a key groove shaft, a shaft coupling, a motor and a synchronous belt. The sample loading table is connected to the base, the base can slide along the bottom disc in the radial direction, the transparent cover covers the bottom disc, the first synchronous belt pulley is connected below the bottom disc, one end of the bearing is connected to the first synchronous belt pulley, and the other end is fixed to the base plate, the key groove shaft is fixed to the base plate, the fastening shaft is sleeved outside the key groove shaft, the second synchronous belt pulley is sleeved outside the fastening shaft, the motor is connected to the key groove shaft through the shaft coupling, the first synchronous belt pulley and the second synchronous belt pulley are connected through the synchronous belt, and the radius of the first synchronous belt pulley is smaller than that of the second synchronous belt. The application has low time cost and wide application range.

Description

Technical Field

[0001] The present invention relates to a particle surface adhesion energy measurement technology, and in particular to a centrifugal particle surface adhesion energy measurement device, system and method based on synchronous belt drive. Background Art

[0002] In fields such as materials science, chemical engineering, and pharmaceutical engineering, particle surface adhesion energy is crucial for understanding particle surface properties, optimizing production processes, and improving product quality. However, measuring particle surface adhesion energy is a complex process, as it involves multiple factors, including the particle's physical and chemical properties, particle shape, size distribution, and external environment.

[0003] With the development of technology, the measurement methods of particle surface adhesion energy are also constantly developing. Common measurement methods include atomic force microscopy (AFM), electric field separation method, collision method, etc. These methods have their own advantages and disadvantages and are suitable for different research scenarios. Although AFM can provide accurate surface morphology and adhesion energy data, it can only measure the adhesion force of a single particle. The measurement is time-consuming and the equipment cost is too expensive. The electric field separation method characterizes the surface adhesion energy of particles by using an electric field to separate the particles from the substrate. However, the target of this technical means is limited to conductive particles. The collision method balances the vibration force and adhesion force through the collision between the sample carrier and the base, but the collision effect is not repeatable and the impact time measurement accuracy is insufficient. Therefore, the technical means in the prior art are usually only applicable to specific measurement environments or experiments, and the time cost is too high. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a centrifugal particle surface adhesion energy measurement device, system and method based on synchronous belt drive with low time cost and wide application range.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] A centrifugal particle surface adhesion energy measuring device based on synchronous belt drive, comprising a sample loading platform, a base, a transparent cover, a base plate, a first synchronous belt pulley, a bearing, a base plate, a fastening shaft, a second synchronous belt pulley, a keyway shaft, a coupling, a motor and a synchronous belt, the sample loading platform is connected to the base, the base can slide along the base plate radially, the transparent cover is covered on the base plate, the first synchronous belt pulley is connected below the base plate, one end of the bearing is connected to the first synchronous belt pulley, the other end is fixed on the base plate, the keyway shaft is fixed on the base plate, the fastening shaft is sleeved outside the keyway shaft, the second synchronous belt pulley is sleeved outside the fastening shaft, the motor is connected to the keyway shaft through the coupling, the first synchronous belt pulley and the second synchronous belt pulley are connected through the synchronous belt, the radius of the first synchronous belt pulley is smaller than that of the second synchronous belt.

[0007] Further, the sample loading platform is L-shaped formed by a horizontal plate and a vertical plate, a through hole is arranged on the horizontal plate, and the horizontal plate is fixed on the base through screws penetrating the through hole on the horizontal plate.

[0008] Further, the base is hollow in the middle, the upper surface of the base plate is provided with a T-shaped protrusion in the radial direction, the base is sleeved outside the T-shaped protrusion and can slide along the T-shaped protrusion, and the side surface of the base is provided with a through hole, which is fixed by screws penetrating the through hole during use.

[0009] Further, a plurality of through holes are arranged on the outer periphery of the bottom edge of the transparent cover, and the transparent cover is fixed on the base plate through screws penetrating the through holes.

[0010] Further, the bearing is a cross roller bearing.

[0011] Further, an annular protrusion is arranged on the upper surface of the base plate and is provided with a countersunk hole, and the inner ring of the bearing is connected to the base plate through the countersunk hole. The upper surface of the base plate is also provided with a through hole, and the keyway shaft is inserted into the through hole.

[0012] A centrifugal particle surface adhesion energy measuring system based on synchronous belt drive, comprising:

[0013] The centrifugal particle surface adhesion energy measuring device described above;

[0014] A pneumatic dispersion device for uniformly dispersing target particles on the sample loading platform of the centrifugal particle surface adhesion energy measuring device before the experiment;

[0015] A camera for taking a particle photo P1 on the sample loading platform before the experiment, and a particle photo P2 on the sample loading platform after the motor is turned on and a period of time of experiment;

[0016] The computer analysis and calculation device is used to analyze and obtain the critical diameter d of the falling target particles based on the particle photos P1 and P2, and calculate the surface adhesion energy of the target particles based on the critical diameter d according to the following formula:

[0017]

[0018] Where Γ is the surface adhesion energy of the target particles, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first synchronous pulley and the second synchronous pulley 9 respectively, and n1 and n2 are the number of teeth of the first synchronous pulley and the second synchronous pulley respectively.

[0019] Furthermore, the computer analysis and calculation device specifically includes:

[0020] The photo analysis module is used to obtain the smallest particle diameter d2 among the falling particles and the diameter d1 of the largest particle in P2 based on the particle photos P1 and P2, and calculate the critical diameter d of the falling particles according to the following formula;

[0021]

[0022] The surface adhesion energy calculation module is used to calculate the surface adhesion energy of the target particles according to the critical diameter d according to the following formula:

[0023]

[0024] A centrifugal particle surface adhesion energy measurement method based on synchronous belt drive, comprising:

[0025] The target particles are randomly and evenly dispersed on the sample stage of the centrifugal particle surface adhesion energy measurement device, and a photo P1 of the particles on the sample stage is taken;

[0026] After the motor is turned on and a period of experiment has passed, a photo P2 of the particles on the sample stage is taken;

[0027] The critical diameter d of the falling target particles is obtained by analyzing the particle photos P1 and P2, and the surface adhesion energy of the target particles is calculated according to the critical diameter d as follows:

[0028]

[0029] Where Γ is the surface adhesion energy of the target particles, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first and second synchronous pulleys respectively, and n1 and n2 are the number of teeth of the first and second synchronous pulleys respectively.

[0030] Compared with existing technologies, the present invention offers the following advantages: It can perform repetitive experiments on a single particle or measure the surface adhesion energy of multiple particles simultaneously, significantly reducing experimental workload and time costs while improving the accuracy of experimental results. The synchronous transmission device employed in the present invention utilizes a large synchronous pulley to drive a smaller synchronous pulley, enhancing the rotational effect required for the experiment and thus reducing the hardware requirements. The sliding attachment of the base to the T-shaped protrusion allows for arbitrary centrifugal radius settings, increasing the present invention's flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the overall structure of a centrifugal particle surface adhesion energy measuring device based on synchronous belt drive provided by an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of a portion of the structure of a centrifugal particle surface adhesion energy measuring device based on synchronous belt drive provided by an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of another portion of the structure of the centrifugal particle surface adhesion energy measuring device based on synchronous belt drive provided by an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the enlarged structure of the sample carrier and the base in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Example 1

[0037] The embodiment of the present invention provides a centrifugal particle surface adhesion energy measuring device based on synchronous belt drive, such as Figure 1 、 2 As shown in Figure 3, it includes a sample carrier 1, a base 2, a transparent cover 3, a chassis 4, a first synchronous pulley 5, a bearing 6, a base plate 7, a fastening shaft 8, a second synchronous pulley 9, a keyway shaft 10, a coupling 11, a motor 12 and a synchronous belt. The sample carrier 1 is connected to the base 2, the base 2 can slide radially along the chassis 4, the transparent cover 3 is covered on the chassis 4, the first synchronous pulley 5 is connected to the bottom of the chassis 4, the bearing 6 is a cross roller bearing, one end of the bearing 6 is connected to the first synchronous pulley 5, and the other end is fixed on the base plate 7, the keyway shaft 10 is fixed on the base plate 7, the fastening shaft 8 is sleeved on the outside of the keyway shaft 10, the second synchronous pulley 9 is sleeved on the outside of the fastening shaft 8, the motor 12 is connected to the keyway shaft 10 through the coupling 11, and the first synchronous pulley 5 and the second synchronous pulley 9 are connected through a synchronous belt (not shown).

[0038] like Figure 2 and4 As shown, the sample loading platform 1 is L-shaped, formed by a horizontal plate and a vertical plate. The horizontal plate has through-holes, through which the horizontal plate is fixed to the base 2 by screws passing through the through-holes. The base 2 is hollowed out in the middle, and the upper surface of the chassis 4 is provided with a T-shaped protrusion 13 in the radial direction. The base 2 is sleeved outside the T-shaped protrusion 13 and can slide along the T-shaped protrusion. The base 2 has through-holes on the side, through which screws are inserted to fix the base 2 in place during use.

[0039] The transparent cover 3 has several through-holes on its bottom periphery, and is secured to the chassis 4 via screws passing through the through-holes. An annular protrusion and countersunk holes are provided on one side of the top surface of the base plate 7. The inner race of the bearing 6 is connected to the base plate 7 via the countersunk holes. A through-hole is provided on the other side of the top surface of the base plate 7, into which a keyed shaft 10 is inserted.

[0040] The first synchronous pulley 5 and the second synchronous pulley 9 constitute a synchronous transmission system. The rotation of the motor 12 drives the keyway shaft 10, which in turn drives the second synchronous pulley 9. The rotation of the second synchronous pulley 9 drives the first synchronous pulley 5 through the synchronous belt. The radius of the first synchronous pulley 5 is smaller than that of the second synchronous pulley 9, which can amplify the centrifugal effect and enhance the experimental effect.

[0041] Example 2

[0042] An embodiment of the present invention provides a centrifugal particle surface adhesion energy measurement system based on synchronous belt drive, comprising:

[0043] The centrifugal particle surface adhesion energy measuring device of the first embodiment;

[0044] A pneumatic dispersion device is used to randomly and evenly disperse the target particles on the sample carrier 1 of the centrifugal particle surface adhesion energy measurement device before the experiment;

[0045] A camera, used to take a photo P1 of particles on the sample stage 1 before the experiment, and a photo P2 of particles on the sample stage 1 after the motor 12 is turned on and a period of experiment has passed; specifically, a CCD camera;

[0046] The computer analysis and calculation device is used to analyze and obtain the critical diameter d of the falling target particles based on the particle photos P1 and P2, and calculate the surface adhesion energy of the target particles based on the critical diameter d according to the following formula:

[0047]

[0048] Where Γ is the surface adhesion energy of the target particles, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first synchronous pulley 5 and the second synchronous pulley 9 respectively, and n1 and n2 are the number of teeth of the first synchronous pulley 5 and the second synchronous pulley 9 respectively.

[0049] Wherein, the computer analysis and calculation device specifically includes:

[0050] The photo analysis module is used to obtain the smallest particle diameter d2 among the falling particles and the diameter d1 of the largest particle in P2 based on the particle photos P1 and P2, and calculate the critical diameter d of the falling particles according to the following formula;

[0051]

[0052] The surface adhesion energy calculation module is used to calculate the surface adhesion energy of the target particles according to the critical diameter d according to the following formula:

[0053]

[0054] The calculation formula of surface adhesion energy can be derived from the balance between centrifugal force and adhesion force as follows:

[0055]

[0056] Arranging the above formula, we get F ad and Fc are the adhesion force and centrifugal force of the particles, respectively.

[0057] Example 3

[0058] An embodiment of the present invention provides a centrifugal particle surface adhesion energy measurement method based on synchronous belt drive, comprising:

[0059] The target particles are randomly and evenly dispersed on the sample carrier 1 of the centrifugal particle surface adhesion energy measuring device, and a photo P1 of the particles on the sample carrier 1 is taken;

[0060] The motor 12 is turned on and after a period of experiment, a photo P2 of the particles on the sample stage 1 is taken;

[0061] The critical diameter d of the falling target particles is obtained by analyzing the particle photos P1 and P2, and the surface adhesion energy of the target particles is calculated according to the critical diameter d as follows:

[0062]

[0063] Where Γ is the surface adhesion energy of the target particles, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first synchronous pulley 5 and the second synchronous pulley 9 respectively, and n1 and n2 are the number of teeth of the first synchronous pulley 5 and the second synchronous pulley 9 respectively.

[0064] The critical diameter d is obtained by obtaining the smallest particle diameter d2 among the falling particles and the largest particle diameter d1 in P2 based on the particle photos P1 and P2, and calculating the critical diameter d of the falling particles according to the following formula:

[0065]

[0066] This method calculates the particle adhesion energy by balancing the centrifugal force and adhesion force during high-speed particle rotation. The experimental principle is simple, the experimental setup is simple, and the operation is easy. The use of a synchronous belt drive and a controllable centrifugal radius design greatly enhances experimental effectiveness and flexibility, while reducing experimental costs and hardware requirements. In this invention, the experimental setup is not strictly limited to a single L-shaped sample stage; the experimental examples serve only to demonstrate the experimental setup and method.

[0067] It should be understood that the above embodiments and descriptions only describe the principles, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements all fall within the scope of protection of the present invention.

Claims

1. A centrifugal particle surface adhesion energy measurement device based on synchronous belt drive, characterized by: The invention comprises a sample carrier (1), a base (2), a transparent cover (3), a chassis (4), a first synchronous pulley (5), a bearing (6), a base plate (7), a fastening shaft (8), a second synchronous pulley (9), a keyway shaft (10), a coupling (11), a motor (12) and a synchronous belt, wherein the sample carrier (1) is connected to the base (2), the base (2) can slide radially along the chassis (4), the transparent cover (3) is covered on the chassis (4), the first synchronous pulley (5) is connected to the bottom of the chassis (4), one end of the bearing (6) is connected to the bottom of the chassis (4), and the second synchronous pulley (5) is connected to the bottom of the chassis (4). The first synchronous pulley (5) is connected to the first synchronous pulley, and the other end is fixed on the base plate (7). The keyway shaft (10) is fixed on the base plate (7). The fastening shaft (8) is sleeved on the outside of the keyway shaft (10). The second synchronous pulley (9) is sleeved on the outside of the fastening shaft (8). The motor (12) is connected to the keyway shaft (10) through the coupling (11). The first synchronous pulley (5) and the second synchronous pulley (9) are connected through a synchronous belt. The radius of the first synchronous pulley (5) is smaller than the radius of the second synchronous pulley (9).

2. The centrifugal particle surface adhesion energy measuring device based on synchronous belt drive according to claim 1, characterized in that: The sample loading platform (1) is L-shaped formed by a horizontal plate and a vertical plate, the horizontal plate is provided with a through hole, and the horizontal plate is fixed to the base (2) by screws passing through the through holes in the horizontal plate.

3. The centrifugal particle surface adhesion energy measuring device based on synchronous belt drive according to claim 1, characterized in that: The base (2) is hollowed out in the middle, and a T-shaped protrusion (13) is radially provided on the upper surface of the chassis (4). The base (2) is sleeved outside the T-shaped protrusion (13) and can slide along the T-shaped protrusion. A through hole is provided on the side of the base (2), and when in use, a screw is inserted into the through hole to stop and fix the base (2).

4. The centrifugal particle surface adhesion energy measuring device based on synchronous belt drive according to claim 1, characterized in that: A plurality of through holes are provided on the outer periphery of the bottom edge of the transparent cover (3), and the transparent cover (3) is fixed to the chassis (4) by screws passing through the through holes.

5. The centrifugal particle surface adhesion energy measuring device based on synchronous belt drive according to claim 1, characterized in that: The upper surface of the base plate (7) is provided with an annular protrusion and a countersunk hole, and the inner ring of the bearing (6) is connected to the base plate (7) through the countersunk hole.

6. The centrifugal particle surface adhesion energy measuring device based on synchronous belt drive according to claim 1, characterized in that: A through hole is provided on the upper surface of the base plate (7), and the keyway shaft (10) is inserted into the through hole.

7. A centrifugal particle surface adhesion energy measurement system based on synchronous belt drive, characterized in that: include: The centrifugal particle surface adhesion energy measuring device according to claim 1; A pneumatic dispersion device is used to randomly and evenly disperse target particles on a sample carrier (1) of a centrifugal particle surface adhesion energy measuring device before the experiment; A camera is used to take a photo P1 of particles on the sample carrier (1) before the experiment, and a photo P2 of particles on the sample carrier (1) after the motor (12) is turned on and the experiment has lasted for a period of time; The computer analysis and calculation device is used to analyze and obtain the critical diameter d of the falling target particles based on the particle photos P1 and P2, and calculate the surface adhesion energy of the target particles based on the critical diameter d according to the following formula: Where Γ is the surface adhesion energy of the target particles, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first synchronous pulley (5) and the second synchronous pulley (9), respectively; n1 and n2 are the numbers of teeth of the first synchronous pulley (5) and the second synchronous pulley (9), respectively.

8. The centrifugal particle surface adhesion energy measurement system based on synchronous belt drive according to claim 7, characterized in that: The computer analysis and calculation device specifically includes: The photo analysis module is used to obtain the smallest particle diameter d2 among the falling particles and the diameter d1 of the largest particle in P2 based on the particle photos P1 and P2, and calculate the critical diameter d of the falling particles according to the following formula; The surface adhesion energy calculation module is used to calculate the surface adhesion energy of the target particles according to the critical diameter d according to the following formula:

9. A centrifugal particle surface adhesion energy measurement method based on synchronous belt drive, characterized in that: The method is based on the centrifugal particle surface adhesion energy measuring device according to claim 1, and specifically comprises: The target particles are randomly and evenly dispersed on the sample carrier (1) of the centrifugal particle surface adhesion energy measuring device, and a photo P1 of the particles on the sample carrier (1) is taken; The motor (12) is turned on and after a period of experiment, a photo P2 of the particles on the sample stage (1) is taken; The critical diameter d of the falling target particles is obtained by analyzing the particle photos P1 and P2, and the surface adhesion energy of the target particles is calculated according to the critical diameter d as follows: Where Γ is the surface adhesion energy of the target particles, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first synchronous pulley (5) and the second synchronous pulley (9), respectively; n1 and n2 are the numbers of teeth of the first synchronous pulley (5) and the second synchronous pulley (9), respectively.

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