CN108014895B - Ultrasonic energy-gathering crushing method and device - Google Patents
Ultrasonic energy-gathering crushing method and device Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to the technical field of micro-machining, in particular to an ultrasonic energy-gathering crushing method and device. The device comprises an ultrasonic transducer (1), a coupling liquid cavity (2), an energy-gathering crushing cavity (3), a diaphragm (4) and a diaphragm groove (7). The device utilizes an ultrasonic transducer with a concave spherical energy conversion surface to generate energy focusing, and utilizes a cylindrical crushing cavity to conduct guiding recovery, reflection and aggregation of secondary energy, so as to control the feed liquid loaded with particles to flow through energy enrichment areas of all levels. According to the ultrasonic energy-gathering crushing method, energy concentration is favorable for improving energy density, and high-order energy supply is provided for crushing. The method can improve the energy level and the energy utilization efficiency, and improve the controllability of the particle micronization process and the consistency of the granularity of the product.
Description
Technical Field
The invention relates to the technical field of micro-machining, in particular to an ultrasonic energy-gathering crushing method and device.
Background
Ultrasonic disruption is a process of effecting disruption of solid particles or biological tissue or the like therein using an ultrasonic field in a liquid medium. When ultrasonic wave propagates in liquid, a stable sound pressure field with alternately changed positive and negative is formed, and a local transient negative pressure area is formed in a certain area of liquid medium. On the one hand, the sound pressure field with alternately changed positive and negative can alternately press the particles in the region, and when the pressing frequency is consistent with the resonance frequency of the particles, the particles can be induced to enter a resonance state so as to collapse; on the other hand, the positive and negative alternate pressing of the particles can also generate fatigue stress to cause the breakage of the particles; in the sound pressure field with alternately changed positive and negative, the liquid can form cavity (unsteady micro bubble) at low pressure, cavity collapse can be induced at high pressure, the cavity wall impact pressure generated by cavity collapse can reach hundred megapascals, and the single or cumulative effect of the high-energy impact force can generate huge compression impact on material particles in the neighborhood of the high-energy impact force, so that the material particles are directly crushed or are fatigued and crushed under the action of fatigued stress.
The ultrasonic crushing has unique effect on further crushing of small-particle hard materials, and has wide application in the fields of food, biology, medicine and the like. The ultrasonic crushing of small-particle hard materials has high energy level requirements and can generate accumulation effect. Therefore, the ultrasonic energy field energy with high density and high magnitude level is an important precondition for realizing high-energy-efficiency crushing.
The existing ultrasonic crushing device adopts an immersion type amplitude transformer structure in the energy input mode; the material cavity is mainly a fixed-volume trough-type or columnar container; the crushing energy is usually changed by increasing the input power or using a large amplitude horn, and a batch processing mode is adopted.
The existing ultrasonic crushing equipment has the following defects:
the utilization of ultrasonic energy does not consider the coupling effect of a sound source and a sound field of a feed liquid cavity, and the energy utilization mode is rough and has low efficiency; the ultrasonic radiation form of the immersed amplitude transformer structure is single, the energy is concentrated near the end part and weakened in an inverted cone shape, and the ultrasonic radiation is difficult to gather and directionally use; the energy dissipation and heat generation are serious; the hole collapse points are concentrated near the end of the amplitude transformer, the distribution has obvious local regionality, the crushing uniformity is poor, and the distribution range of the particle size after treatment is wider; impact crushing energy is insufficient to realize energy convergence and targeted positioning application; the flow, energy distribution and guiding of the feed liquid in the ultrasonic crushing process are lack of active and effective control.
Disclosure of Invention
The invention aims to provide an ultrasonic energy-gathering crushing method which can improve the energy level and the energy utilization efficiency and improve the controllability of the particle micronization process and the consistency of the granularity of products.
Another object of the present invention is to provide an ultrasonic energy-gathering crushing device that uses an ultrasonic transducer with a concave spherical transduction surface to generate energy focusing, and uses a cylindrical crushing cavity to conduct guided recovery, reflection and gathering of secondary energy, so as to control the flow of the material liquid loaded with particles through each stage of energy-gathering area.
The invention aims at realizing the following technical scheme:
ultrasonic energy-gathering crushing device: comprises an ultrasonic transducer 1, a coupling liquid cavity 2, an energy-gathering crushing cavity 3, a diaphragm 4 and a diaphragm groove 7. Wherein:
the ultrasonic transducer 1 comprises a concave sphere transduction surface; the sphere center of the concave sphere transduction surface is a concave sphere center 12; the concave sphere center 12 is located at the inlet of the crushing cavity 9 and on the axis of the ultrasonic energy-gathering crushing device.
The coupling liquid cavity 2 is of a hollow cylindrical structure, the hollow part is a coupling liquid cavity 5, and the coupling liquid cavity 5 is in a truncated cone shape; the extended top point of the round platform peripheral surface of the coupling liquid cavity 5 is a concave sphere center 12; the bottom end of the coupling liquid cavity 5 is communicated with the fixed hole 6, and the top end is communicated with the diaphragm groove 7; the coupling liquid cavity 2 is radially provided with a coupling liquid balance hole 13 which penetrates through the coupling liquid cavity 2 and is communicated with the coupling liquid cavity 5; the ultrasonic transducer 1 is arranged in the fixing hole 6.
The energy-collecting crushing cavity 3 is of a cylindrical hollow structure, and the hollow part is an energy-collecting cavity 8, a crushing cavity 9 and a liquid outlet pipe 11; the energy-collecting cavity 8 is of a conical structure, the conical vertex of the energy-collecting cavity is a concave spherical center 12, and the vertex angle of the conical structure is the same vertex angle as the vertex angle formed by the extension of the round platform peripheral surface of the coupling liquid cavity 5; the crushing cavity 9 and the liquid outlet pipe 11 are cylindrical; the inlet of the crushing cavity 9 is communicated with the vertex of the energy collecting cavity 8, and the outlet of the crushing cavity 9 is connected with the inlet of the liquid outlet pipe 11; the energy collecting cavity 8, the crushing cavity 9 and the liquid outlet pipe 11 are coaxially communicated with the axis of the ultrasonic energy collecting crushing device; the energy-gathering crushing cavity 3 is radially provided with a liquid inlet 10 which penetrates through the energy-gathering crushing cavity 3 and is communicated with the energy-gathering cavity 8.
The cross-sectional diameter of the outlet pipe 11 is smaller than the cross-sectional diameter of the crushing cavity 9; the junction of the two forms an abrupt cross section.
The diameter of the cross section of the bottom end of the energy collection cavity 8 is equal to the diameter of the cross section of the top end of the coupling liquid cavity 5; a positioning boss 14 is arranged outside the bottom end of the conical energy-collecting cavity 8; the energy-gathering crushing cavity 3 is connected with the coupling liquid cavity 2 through the coaxial cooperation of the positioning boss 14 and the diaphragm groove 7; the diaphragm groove 7 is internally provided with a diaphragm 4.
When the energy-collecting crushing cavity 3 is connected with the coupling liquid cavity 2, the positioning boss 14 can fix the diaphragm 4 in the diaphragm groove 7; the energy collecting cavity 8 and the inner peripheral surface of the coupling liquid cavity 5 are positioned on the same conical surface.
The crushing cavity 9 is a hard wall surface or a soft wall surface.
The abrupt change section of the communication part between the outlet of the crushing cavity 9 and the inlet of the liquid outlet pipe 11 is a hard wall surface or a soft wall surface.
When the number of ultrasonic wave collection stages entering the crushing cavity 9 is more than or equal to three, the abrupt cross section is of a soft wall structure.
When the number of ultrasonic wave collection stages entering the crushing cavity 9 is smaller than three, the abrupt cross section is of a hard wall structure.
The ratio of the cross-sectional diameter of the outlet pipe 11 to the cross-sectional diameter of the crushing cavity 9 is 1:5-1:10.
The diameter of the crushing cavity 9 is 1.0-1.2 times of the wavelength of the ultrasonic wave emitted by the ultrasonic transducer 1.
The length of the crushing cavity 9 is an integral multiple of half the wavelength of the ultrasonic wave emitted by the ultrasonic transducer 1.
An ultrasonic energy-gathering crushing method using an ultrasonic energy-gathering crushing device, comprising the following steps:
a. placing the ultrasonic energy-gathering crushing device by taking the liquid outlet pipe 11 as the top end and the ultrasonic transducer 1 as the bottom end; before the ultrasonic energy-gathering crushing device is started, coupling liquid is filled in the coupling liquid cavity 5, and the outer ports of the two coupling liquid balance holes 13 are respectively communicated with a liquid pool; the liquid pool is filled with coupling liquid; the outer ports of the two coupling liquid balance holes 13 are completely immersed in the coupling liquid in the liquid bath.
b. The ultrasonic transducer 1 is started, and the gas in the coupling liquid cavity 5 is exhausted.
c. Continuously injecting feed liquid loaded with material particles at a set flow rate through a feed liquid inlet 10, and filling the energy collecting cavity 8 and the crushing cavity 9 with the feed liquid; the energy of the ultrasonic transducer 1 is converged into a first-stage energy core at the concave spherical center 12 of the energy-gathering cavity 8, and is converged into a second-stage, third-stage and more multi-stage energy cores in the crushing cavity 9 in the axial direction in a fractional manner.
d. After the feed liquid in the energy collecting cavity 8 flows through the concave spherical center 12 to absorb the energy of the primary energy core, the feed liquid continuously absorbs the secondary energy core, the tertiary energy core and the multi-stage energy cores above in the flowing process of the feed liquid continuously flowing to the liquid outlet pipe 11 under the pushing of the energy of the primary energy core, so that the material particles in the feed liquid are continuously crushed.
In step d, after the energy enters the crushing cavity 9 through the concave sphere center 12, more than two times of reflection focusing are realized.
The invention has the beneficial effects that:
1) According to the ultrasonic energy-gathering crushing method, energy concentration is favorable for improving energy density, and high-order energy supply is provided for crushing;
2) According to the ultrasonic energy-gathering crushing method, energy gathering is beneficial to expansion of peak-valley pressure difference in a focusing area and formation and collapse of cavities, and high-strength derivative impact energy is generated;
3) According to the ultrasonic energy-gathering crushing method, through matching the frequency with the diameter of the crushing cavity, the material flow can completely, uniformly and controllably flow through the energy enrichment areas of each level to form balanced energy exchange and energy receiving conditions, and the controllability of the crushing process and the uniformity of the granularity of the product are improved;
4) The ultrasonic energy-gathering crushing device can realize the control of the crushing effect through energy (power) and treatment time (flow rate) adjustment;
5) The ultrasonic energy-gathering crushing device can realize the recovery, quality improvement and reutilization of secondary energy and drive the improvement of energy efficiency.
Drawings
FIG. 1 is a cross-sectional view of an ultrasonic energy-gathering breaker of the present invention;
FIG. 2 is a schematic diagram of the coupling liquid cavity structure of the ultrasonic energy-gathering crushing device;
fig. 3 is a schematic diagram of the energy-collecting crushing cavity of the ultrasonic energy-collecting crushing device.
The reference numerals are:
1 ultrasonic transducer 2 coupling liquid cavity
3 energy-gathering crushing cavity 4 diaphragm
5 coupling liquid cavity 6 fixing hole
7 diaphragm groove 8 energy gathering cavity
9 crushing cavity 10 liquid inlet
11 liquid outlet pipe 12 concave sphere center
13 coupling liquid balance hole 14 positioning boss
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples.
An ultrasonic energy-gathering crushing device comprises an ultrasonic transducer 1, a coupling liquid cavity 2, an energy-gathering crushing cavity 3, a diaphragm 4 and a diaphragm groove 7. Wherein,,
the ultrasonic transducer 1 is of a disc structure and comprises a concave sphere transduction surface; the sphere center of the concave sphere transduction surface is a concave sphere center 12. The concave sphere center 12 is located at the inlet of the crushing cavity 9 and on the axis of the ultrasonic energy-gathering crushing device.
The coupling liquid cavity 2 is of a hollow cylindrical structure, the hollow part is a coupling liquid cavity 5, and the coupling liquid cavity 5 is in a truncated cone shape; the extended vertex of the round platform peripheral surface of the coupling liquid cavity 5 is a concave sphere center 12. The large end of the coupling liquid cavity 5 is communicated with the fixed hole 6, and the small end is communicated with the diaphragm groove 7. The coupling liquid cavity 2 is radially provided with a coupling liquid balance hole 13 which penetrates through the coupling liquid cavity 2 and is communicated with the coupling liquid cavity 5. The ultrasonic transducer 1 is arranged in the fixing hole 6.
The energy-collecting crushing cavity 3 is of a cylindrical hollow structure, and the hollow part is an energy-collecting cavity 8, a crushing cavity 9 and a liquid outlet pipe 11; the energy-collecting cavity 8 is of a conical structure, the conical vertex of the energy-collecting cavity is a concave spherical center 12, and the vertex angle of the conical structure is the same vertex angle as the vertex angle formed by the extension of the round platform peripheral surface of the coupling liquid cavity 5; the crushing cavity 9 and the liquid outlet pipe 11 are both cylindrical. The inlet of the crushing cavity 9 is communicated with the vertex of the energy collecting cavity 8, and the outlet of the crushing cavity 9 is connected with the inlet of the liquid outlet pipe 11; the energy collecting cavity 8, the crushing cavity 9 and the liquid outlet pipe 11 are coaxially communicated with the axis of the ultrasonic energy collecting and crushing device; . The energy-gathering crushing cavity 3 is radially provided with a liquid inlet 10 which penetrates through the energy-gathering crushing cavity 3 and is communicated with the energy-gathering cavity 8.
The cross-sectional diameter of the outlet pipe 11 is smaller than the cross-sectional diameter of the crushing cavity 9; the junction of the two forms an abrupt cross section.
The cross-sectional diameter of the bottom end of the energy collecting cavity 8 is equal to that of the top end of the coupling liquid cavity 5. The outer part of the large end of the conical energy collecting cavity 8 is provided with a positioning boss 14. The energy-collecting crushing cavity 3 is connected with the coupling liquid cavity 2 through the coaxial cooperation of the positioning boss 14 and the diaphragm groove 7. The diaphragm groove 7 is internally provided with a diaphragm 4.
When the energy-collecting crushing cavity 3 is connected with the coupling liquid cavity 2, the positioning boss 14 can fix the diaphragm 4 in the diaphragm groove 7; the energy collecting cavity 8 and the inner peripheral surface of the coupling liquid cavity 5 are positioned on the same conical surface.
Preferably, the crushing chamber 9 is a hard wall or a soft wall.
Preferably, the abrupt cross section of the connection between the outlet of the crushing chamber 9 and the inlet of the liquid outlet pipe 11 is a hard wall or a soft wall. Wherein, when the ultrasonic wave collection level number entering the crushing cavity 9 is more than or equal to three, the abrupt change section adopts a soft wall structure; when the number of ultrasonic wave collection stages entering the crushing cavity 9 is smaller than three, the abrupt cross section adopts a hard wall structure.
Preferably, the ratio of the cross-sectional diameter of the outlet pipe 11 to the cross-sectional diameter of the crushing chamber 9 is 1:5 to 1:10.
Preferably, the liquid inlet 10 and the coupling liquid balance hole 13 are arranged in parallel in the horizontal direction.
Preferably, the diameter of the crushing cavity 9 is 1.0 to 1.2 times the wavelength of the ultrasonic wave emitted by the ultrasonic transducer 1.
Preferably, the length of the crushing cavity 9 is an integer multiple of half the wavelength of the ultrasonic wave emitted by the ultrasonic transducer 1.
The working principle of the ultrasonic energy-gathering and crushing device is that the ultrasonic transducer 1 is used as the coupling of ultrasonic sources, energy gathering cavities and sound fields of coupling cavities, and the energy gathering cavity 8 with a conical structure is constructed in the energy transmission direction of the concave sphere energy-gathering surface of the ultrasonic transducer 1, so that the energy level of a focusing area can be effectively improved. The crushing cavity 9 of the cylindrical pipeline is adopted, and scattered energy is guided into the crushing cavity 9 of the cylindrical pipeline after being focused by the concave sphere transduction surface for multiple convergence. Depending on the nature of the acoustic propagation of the fixed length pipe, an energy enrichment zone in the form of a standing wave is formed. When the feed liquid loaded with particles continuously passes through the energy collecting cavity 8, the crushing cavity 9 and the liquid outlet pipe 11, energy is continuously absorbed, so that the particles in the feed liquid are impacted and crushed for multiple times, and a high-efficiency crushing process is realized.
The structure size and the radiation frequency of the concave sphere transduction surface of the ultrasonic transducer 1 directly determine the structures of the coupling liquid cavity 5, the energy collecting cavity 8 and the crushing cavity 9. The distance between the cross-sectional diameter of the crushing cavity 9 and the concave sphere center 12 can be changed according to the number of converging stages contained in the crushing cavity 9, and generally, at least two-stage energy cores are contained in the crushing cavity 9. In operation, the power of the ultrasonic transducer 1 is adjustable. And when the structure of the ultrasonic energy-gathering crushing device, the coupling liquid and the feed liquid are fixed, the ultrasonic frequency needs to be constant.
The cross section diameter of the liquid outlet pipe 11 is far smaller than that of the crushing cavity 9, so that when energy enters the liquid outlet pipe 11, high secondary energy cores are formed through the blocking and reflecting effects of the end surfaces, and when feed liquid flows through the liquid outlet pipe 11, the energy of the high secondary energy cores is absorbed. Simultaneously, sound wave reflection is formed at the inlet of the liquid outlet pipe 11 to block energy overflow.
The ultrasonic energy-gathering crushing method comprises the following steps:
a. the ultrasonic energy-gathering crushing device is placed with the liquid outlet pipe 11 as the top end and the ultrasonic transducer 1 as the bottom end. Before the ultrasonic energy-gathering crushing device is started, coupling liquid is filled in the coupling liquid cavity 5, and the outer ports of the two coupling liquid balance holes 13 are respectively communicated with a liquid pool; the liquid pool is filled with coupling liquid. The outer ports of the two coupling liquid balance holes 13 are completely immersed in the coupling liquid in the liquid bath. The coupling liquid provides medium conditions for ultrasonic energy transmission, isolates the working liquid and avoids the ultrasonic probe from directly contacting the working liquid.
b. The ultrasonic transducer 1 is started, and the gas in the coupling liquid cavity 5 is exhausted.
c. Then, the feed liquid loaded with the material particles is continuously injected from the feed liquid inlet 10 at a set flow rate, and the feed liquid fills the energy accumulating cavity 8 and the crushing cavity 9. At this time, the energy of the ultrasonic transducer 1 is converged into a primary energy core at the concave spherical center 12 of the energy converging cavity 8, and is converged into a secondary energy core, a tertiary energy core and a multistage energy core with more than three stages in the crushing cavity 9 in the axial direction.
d. After the feed liquid in the energy collecting cavity 8 flows through the concave spherical center 12 to absorb the energy of the primary energy core, the energy of the primary energy core is pushed to flow to the liquid outlet pipe 11, and then secondary, tertiary and more than tertiary multi-stage energy cores are continuously absorbed.
The ultrasonic energy-collecting crushing device is placed by taking the liquid outlet pipe 11 as the top end and the ultrasonic transducer 1 as the bottom end, so that the gas in the energy-collecting cavity 8 and the crushing cavity 9 can be discharged at any time, and the absorption of bubbles to impact energy is reduced. Simultaneously, the liquid formed under the nonlinear effect of the ultrasound can flow in an acoustic way, so that the turbulence of the liquid in the energy-collecting cavity 8 can be promoted, and the deposition of liquid particles on the diaphragm 4 is avoided.
Preferably, in step d, more than two reflection foci are achieved after the energy has entered the crushing chamber 9 via the concave sphere 12.
Claims (10)
1. An ultrasonic energy-gathering crushing device is characterized in that: the ultrasonic energy-collecting device comprises an ultrasonic transducer (1), a coupling liquid cavity (2), an energy-collecting crushing cavity (3), a diaphragm (4) and a diaphragm groove (7); wherein,,
the ultrasonic transducer (1) comprises a concave sphere transduction surface; the sphere center of the concave sphere transduction surface is a concave sphere center (12); the concave sphere center (12) is positioned at the inlet of the crushing cavity (9) and is positioned on the axis of the ultrasonic energy-gathering crushing device;
the coupling liquid cavity (2) is of a hollow cylindrical structure, the hollow part is a coupling liquid cavity (5), and the coupling liquid cavity (5) is in a truncated cone shape; the extended vertex of the round table peripheral surface of the coupling liquid cavity (5) is a concave sphere center (12); the bottom end of the coupling liquid cavity (5) is communicated with a fixed hole (6), and the top end of the coupling liquid cavity is communicated with a diaphragm groove (7); a coupling liquid balance hole (13) penetrating through the coupling liquid cavity (2) and communicated with the coupling liquid cavity (5) is radially formed in the coupling liquid cavity (2); an ultrasonic transducer (1) is arranged in the fixed hole (6);
the energy-collecting crushing cavity (3) is of a cylindrical hollow structure, and the hollow part is an energy-collecting cavity (8), a crushing cavity (9) and a liquid outlet pipe (11); the energy-collecting cavity (8) is of a conical structure, the conical vertex of the energy-collecting cavity is a concave spherical center (12), and the vertex angle of the conical structure is the same as the vertex angle formed by the extension of the circumferential surface of the round table of the coupling liquid cavity (5); the crushing cavity (9) and the liquid outlet pipe (11) are cylindrical; the inlet of the crushing cavity (9) is communicated with the top point of the energy collecting cavity (8), and the outlet of the crushing cavity (9) is connected with the inlet of the liquid outlet pipe (11); the energy collecting cavity (8), the crushing cavity (9) and the liquid outlet pipe (11) are coaxially communicated with the axis of the ultrasonic energy collecting crushing device; the energy-gathering crushing cavity (3) is radially provided with a liquid inlet (10) which penetrates through the energy-gathering crushing cavity (3) and is communicated with the energy-gathering cavity (8);
the cross-sectional diameter of the liquid outlet pipe (11) is smaller than that of the crushing cavity (9); the junction of the two forms a mutation section;
the diameter of the cross section of the bottom end of the energy collection cavity (8) is equal to the diameter of the cross section of the top end of the coupling liquid cavity (5); a positioning boss (14) is arranged outside the bottom end of the conical energy-collecting cavity (8); the energy-gathering crushing cavity (3) is connected with the coupling liquid cavity (2) through the coaxial cooperation of the positioning boss (14) and the diaphragm groove (7); a diaphragm (4) is arranged in the diaphragm groove (7);
when the energy-collecting crushing cavity (3) is connected with the coupling liquid cavity (2), the positioning boss (14) can fix the diaphragm (4) in the diaphragm groove (7); the energy-gathering cavity (8) and the inner peripheral surface of the coupling liquid cavity (5) are positioned on the same conical surface.
2. The ultrasonic energy harvesting breaker of claim 1, wherein: the crushing cavity (9) is a hard wall surface or a soft wall surface.
3. The ultrasonic energy harvesting breaker of claim 1, wherein: the abrupt change section of the connection part between the outlet of the crushing cavity (9) and the inlet of the liquid outlet pipe (11) is a hard wall surface or a soft wall surface.
4. An ultrasonic energy harvesting breaker according to claim 3, wherein: when the number of ultrasonic wave collection stages entering the crushing cavity (9) is more than or equal to three, the abrupt cross section is of a soft wall surface structure.
5. An ultrasonic energy harvesting breaker according to claim 3, wherein: when the number of ultrasonic wave collection stages entering the crushing cavity (9) is smaller than three, the abrupt cross section is of a hard wall surface structure.
6. The ultrasonic energy harvesting breaker of claim 1, wherein: the ratio of the cross-sectional diameter of the liquid outlet pipe (11) to the cross-sectional diameter of the crushing cavity (9) is 1:5-1:10.
7. The ultrasonic energy harvesting breaker of claim 1, wherein: the diameter of the crushing cavity (9) is 1.0-1.2 times of the wavelength of the ultrasonic wave emitted by the ultrasonic transducer (1).
8. The ultrasonic energy harvesting breaker of claim 1, wherein: the length of the crushing cavity (9) is an integral multiple of half wavelength of ultrasonic waves emitted by the ultrasonic transducer (1).
9. An ultrasonic energy-collecting crushing method using the ultrasonic energy-collecting crushing device according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
a. placing the ultrasonic energy-gathering crushing device with a liquid outlet pipe (11) as the top end and an ultrasonic transducer (1) as the bottom end; before starting the ultrasonic energy-gathering crushing device, firstly filling the coupling liquid into the coupling liquid cavity (5), and respectively communicating the outer ports of the two coupling liquid balance holes (13) with a liquid pool; the liquid pool is filled with coupling liquid; the outer ports of the two coupling liquid balance holes (13) are completely immersed in the coupling liquid in the liquid pool;
b. starting an ultrasonic transducer (1) and evacuating gas in a coupling liquid cavity (5);
c. the liquid inlet (10) is used for continuously injecting the liquid carrying the material particles at a set flow rate, and the liquid is filled in the energy collecting cavity (8) and the crushing cavity (9); the energy of the ultrasonic transducer (1) is converged into a first-level energy core at a concave spherical center (12) of the energy gathering cavity (8), and is converged into a second-level energy core, a third-level energy core and more than the third-level energy core in the crushing cavity (9) in a multiple-level manner along the axial direction;
d. after the feed liquid in the energy collecting cavity (8) flows through the concave spherical center (12) to absorb the energy of the primary energy core, the feed liquid continuously absorbs the secondary energy core, the tertiary energy core and the multi-stage energy cores above in the flowing process of the feed liquid continuously flowing to the liquid outlet pipe (11) under the pushing of the energy of the primary energy core, so that the material particles in the feed liquid are continuously crushed.
10. The ultrasonic energy-gathering crushing method as recited in claim 9, wherein: in the step d, after the energy enters the crushing cavity (9) through the concave spherical center (12), the reflection focusing is realized for more than two times.
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| GB0914762D0 (en) * | 2009-08-24 | 2009-09-30 | Univ Glasgow | Fluidics apparatus and fluidics substrate |
| US8459121B2 (en) * | 2010-10-28 | 2013-06-11 | Covaris, Inc. | Method and system for acoustically treating material |
| CN102115025B (en) * | 2011-01-07 | 2012-12-26 | 山东理工大学 | Method for preparing polystyrene micro-sphere micro-array by ultrasonic focusing micro-jet process |
| EP2686094A4 (en) * | 2011-03-17 | 2014-12-17 | Covaris Inc | Acoustic treatment vessel and method for acoustic treatment |
| AU2013204792B2 (en) * | 2012-10-08 | 2014-09-18 | Liquitab Systems Limited | Apparatus method and system for disintegration of a solid |
| CN208032762U (en) * | 2018-01-16 | 2018-11-02 | 北京工商大学 | Ultrasonic wave cumulative breaker |
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