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

Abstract

The invention discloses a centrifugal particle surface adhesion energy measuring device based on synchronous belt transmission, which comprises a sample carrying table, a base, a transparent cover, a chassis, a first synchronous belt wheel, a bearing, a substrate, a fastening shaft, a second synchronous belt wheel, a shaft with a key groove, a coupler, a motor and a synchronous belt, the transparent cover covers the base plate, the first synchronous belt wheel is connected to the lower portion of the base plate, one end of the bearing is connected with the first synchronous belt wheel, the other end of the bearing is fixed to the base plate, the shaft with the key groove is fixed to the base plate, the fastening shaft is sleeved outside the shaft with the key groove, the second synchronous belt wheel is sleeved outside the fastening shaft, and the first synchronous belt wheel and the second synchronous belt wheel are fixed to the base plate. The motor is connected with the shaft with the key groove through the coupler, the first synchronous belt wheel and the second synchronous belt wheel are connected through a synchronous belt, and the radius of the first synchronous belt wheel is smaller than that of the second synchronous belt. The method is low in time cost and wide in 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 the fields of materials science, chemical engineering, pharmaceutical engineering, etc., particle surface adhesion energy is of great significance for understanding particle surface properties, optimizing production processes, and improving product quality. However, the measurement of particle surface adhesion energy is a complex process because it involves multiple factors such as the physical and chemical properties of particles, 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 separating the particles from the substrate using an electric field. However, the target of this technical means is limited to conductive particles. The collision method balances the vibration force and adhesion force by colliding the sample carrier with the base, but the collision effect is not repeatable and the collision 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 chassis, a first synchronous pulley, a bearing, a base plate, a fastening shaft, a second synchronous pulley, a keyway shaft, a coupling, a motor and a synchronous belt, wherein the sample loading platform is connected to the base, the base can slide radially along the chassis, the transparent cover is covered on the chassis, the first synchronous pulley is connected below the chassis, one end of the bearing is connected to the first synchronous pulley, and the other end is fixed to the base plate, the keyway shaft is fixed to the base plate, the fastening shaft is sleeved outside the keyway shaft, the second synchronous pulley is sleeved outside the fastening shaft, the motor is connected to the keyway shaft via the coupling, the first synchronous pulley and the second synchronous pulley are connected via a synchronous belt, and the radius of the first synchronous pulley is smaller than the radius of the second synchronous belt.

[0007] Furthermore, the sample loading platform 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 by screws passing through the through holes on the horizontal plate.

[0008] Furthermore, the base is hollow in the middle, and a T-shaped protrusion is radially provided on the upper surface of the chassis. The base is sleeved outside the T-shaped protrusion and can slide along the T-shaped protrusion. A through hole is provided on the side of the base, and the base is stopped and fixed by inserting a screw through the through hole when in use.

[0009] Furthermore, a plurality of through holes are provided on the outer periphery of the bottom edge of the transparent cover, and the transparent cover is fixed to the chassis by screws passing through the through holes.

[0010] Furthermore, the bearing is a crossed roller bearing.

[0011] Furthermore, the upper surface of the base plate is provided with an annular protrusion and 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 measurement system based on synchronous belt drive, comprising:

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

[0014] A pneumatic dispersion device is used to randomly and evenly disperse the target particles on the sample carrier of the centrifugal particle surface adhesion energy measurement device before the experiment;

[0015] A camera is used to take a photo P1 of particles on the sample stage before the experiment, and a photo P2 of particles on the sample stage after the motor is turned on and a period of experiment has passed;

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

[0017]

[0018] Where Γ is the surface adhesion energy of the target particle, 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 according to 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 measuring 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 of the particles on the sample stage is taken (P2);

[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 according to the following formula:

[0028]

[0029] Where Γ is the surface adhesion energy of the target particle, 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 respectively, and n1 and n2 are the number of teeth of the first synchronous pulley and the second synchronous pulley respectively.

[0030] Compared with the prior art, the present invention has the following beneficial effects: the present invention can conduct repeatable experiments on one particle or measure the surface adhesion energy of multiple particles at one time, which greatly reduces the workload of the experiment, reduces the time cost, and improves the accuracy of the experimental results; the synchronous transmission device used in the present invention uses a large synchronous pulley to drive a small synchronous pulley to enhance the rotation effect required for the experiment, thereby reducing the hardware requirements of the experiment. The sliding fixation of the base and the T-shaped protrusion allows it to be set to any centrifugal radius, which increases the flexibility of the present invention. 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 in 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 in an embodiment of the present invention;

[0033] Figure 3 Another partial structural schematic diagram 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 It is a 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 in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] Embodiment 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 , 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 below 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 to the base plate 7, the keyway shaft 10 is fixed to 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, and a through hole is provided on the horizontal plate, and the horizontal plate is fixed to the base 2 by screws passing through the through hole on the horizontal plate. The middle of the base 2 is hollowed out, and a T-shaped protrusion 13 is provided radially 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 the base 2 is stopped and fixed by screws inserted into the through hole when in use.

[0039] 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. An annular protrusion and a countersunk hole are provided on one side of the upper surface of the base plate 7, and the inner ring of the bearing 6 is connected to the base plate 7 through the countersunk hole. A through hole is provided on the other side of the upper surface of the base plate 7, and the keyway shaft 10 is inserted into the through hole.

[0040] The first synchronous pulley 5 and the second synchronous pulley 9 constitute a synchronous transmission system as the main body. The motor 12 rotates to drive the keyway shaft 10 to rotate, and then drives the second synchronous pulley 9 to rotate. The second synchronous pulley 9 rotates to drive the first synchronous pulley 5 to rotate 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] Embodiment 2

[0042] The 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 above-mentioned embodiment 1;

[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 according to the particle photos P1 and P2, and calculate the surface adhesion energy of the target particles according to the critical diameter d according to the following formula:

[0047]

[0048] Where Γ is the surface adhesion energy of the target particle, 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 numbers 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 according to 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 of centrifugal force and adhesion force as follows:

[0055]

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

[0057] Embodiment 3

[0058] The 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 a sample carrier 1 of a 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 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 according to the following formula:

[0062]

[0063] Where Γ is the surface adhesion energy of the target particle, 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 numbers 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 diameter d1 of the largest particle in P2 according to the particle photos P1 and P2, and calculating the critical diameter d of the falling particles according to the following formula:

[0065]

[0066] The present invention uses the balance between centrifugal force and adhesion force when particles rotate at high speed to calculate the particle adhesion energy. The experimental principle is simple, the experimental device is simple and the operation difficulty is low. The use of a synchronous belt transmission device and a controllable centrifugal radius design greatly enhances the experimental effect and experimental flexibility, and reduces the experimental cost and hardware requirements. In the present invention, the experimental device is not completely limited to a single L-shaped sample carrier, and the experimental example only shows the experimental device and experimental 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 measuring device based on synchronous belt drive, characterized in that: 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 below the chassis (4), one end of the bearing (6) is connected to the The first synchronous pulley (5) is connected to the second synchronous pulley (9), 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 outside the keyway shaft (10). The second synchronous pulley (9) is sleeved outside the fastening shaft (8). The motor (12) is connected to the keyway shaft (10) via the coupling (11). The first synchronous pulley (5) and the second synchronous pulley (9) are connected via 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 is 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 on 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 hollow 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) via the countersunk hole.

6. 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 a through hole, 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, used to randomly and evenly disperse the target particles on a sample carrier (1) of a centrifugal particle surface adhesion energy measurement device before the experiment; A camera, 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 been going on 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 according to the particle photos P1 and P2, and calculate the surface adhesion energy of the target particles according to the critical diameter d according to the following formula: Where Γ is the surface adhesion energy of the target particle, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first synchronous belt pulley (5) and the second synchronous belt pulley (9), respectively; n1 and n2 are the numbers of teeth of the first synchronous belt pulley (5) and the second synchronous belt 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 according to 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 the method 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 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 according to the following formula: Where Γ is the surface adhesion energy of the target particle, ρ is the target particle density, R x is the centrifugal radius, ω1 and ω2 are the angular velocities of the first synchronous belt pulley (5) and the second synchronous belt pulley (9), respectively; n1 and n2 are the numbers of teeth of the first synchronous belt pulley (5) and the second synchronous belt pulley (9), respectively.

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