Piezoelectric transducer vibrator structure and ultrasonic cleaning machine

Abstract

The utility model relates to a piezoelectric transducer vibrator structure and ultrasonic cleaning machine, including vibrator amplitude lever, mass cover and piezoelectric transduction structure, the piezoelectric transduction structure includes negative electrode sheet, first piezoelectric ceramic ring, positive electrode sheet, second piezoelectric ceramic ring in proper order, the negative electrode sheet, first piezoelectric ceramic ring, positive electrode sheet, second piezoelectric ceramic ring are all circular ring structure, and the fixed mounting through pre -tightening bolt, the pre -tightening bolt locks mass cover, piezoelectric transduction structure with vibrator amplitude lever, the vibrator amplitude lever includes conduction base, first step conical body, second step conical body, third step conical body, fourth step conical body, the taper of first step conical body is greater than the taper of second step conical body, third step conical body, fourth step conical body constitute amplitude amplification taper head. It directly couples the container to be washed through energy focusing vibrator, and the trace small workpiece is cleaned efficiently.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic cleaning machines, and in particular to a piezoelectric transducer vibrator structure and an ultrasonic cleaning machine. Background Technology

[0002] Existing commercial ultrasonic cleaning equipment generally adopts a design paradigm where a distributed piezoelectric transducer array is fixed to the bottom wall of a steel tank. This results in an excessively large cleaning chamber volume, primarily suitable for cleaning larger workpieces or batches of items. For efficient cleaning of small, micro-sized workpieces (such as laboratory glassware and pharmaceutical beakers), a localized immersion-based single-point directional cleaning architecture is needed to achieve a significant leap in cleaning efficiency. This would simultaneously reduce both cleaning agent consumption and wastewater discharge, aligning with the sustainable development principles of green chemistry experiments.

[0003] The core energy conversion unit of the ultrasonic cleaning system is the piezoelectric ceramic transducer oscillator. This component is assembled with a multi-layered polarized piezoelectric ceramic ring and a specially designed metal resonator under prestress, realizing a multi-level conversion and vibration amplification process of electrical energy to mechanical energy to acoustic energy. Its working principle is based on the inverse piezoelectric effect: when the ultrasonic generator outputs a high-frequency electrical signal to the transducer electrode, the piezoelectric ceramic lattice undergoes d33 mode resonant deformation along the polarization direction, generating micron-level mechanical vibration. This vibration is transmitted to the metal oscillator through rigid coupling, and through the amplification effect of mechanical impedance matching design and resonator structure design, the amplitude is mechanically amplified to form high-intensity longitudinal wave radiation. Ultrasonic waves propagating in liquid media can induce unique cavitation effects and release microjets and shock waves, generating tens of thousands of microbubbles in a very short time. These bubbles undergo a dynamic process of growth, oscillation, and collapse, achieving mechanical peeling and interface fragmentation of submicron-level contaminants on the workpiece surface. Summary of the Invention

[0004] To overcome at least one of the problems mentioned above, this utility model provides a piezoelectric transducer oscillator structure and an ultrasonic cleaning machine, which directly couples the container to be cleaned through an energy-focusing oscillator, enabling efficient cleaning of small, micro-sized workpieces.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a piezoelectric transducer oscillator structure, including an oscillator amplitude rod, a mass cover, and a piezoelectric transducer structure, wherein the piezoelectric transducer structure sequentially includes a negative electrode plate, a first piezoelectric ceramic ring, a positive electrode plate, and a second piezoelectric ceramic ring; the negative electrode plate, the first piezoelectric ceramic ring, the positive electrode plate, and the second piezoelectric ceramic ring are all ring-shaped structures, and are fixedly installed by pre-tightening bolts, wherein the pre-tightening bolts lock the mass cover, the piezoelectric transducer structure, and the oscillator amplitude rod; The oscillator amplitude transformer includes a transmission base, a first-order cone, a second-order cone, a third-order cone, and a fourth-order cone; the taper of the first-order cone is greater than the taper of the second-order cone; the third-order cone and the fourth-order cone form an amplitude amplification cone head.

[0006] Preferably, the piezoelectric transducer structure further includes an insulating straight column, which is inserted into the middle of the negative electrode plate, the first piezoelectric ceramic ring, the positive electrode plate, and the second piezoelectric ceramic ring. The pre-tightening bolt is inserted into the insulating straight column and locked to the vibrator amplitude rod. The mass cover is provided with a countersunk screw hole.

[0007] Preferably, the taper of the first-order cone is 14°, and the taper of the second-order cone is 4°.

[0008] Preferably, the taper of the third-order cone is 155° and the taper of the fourth-order cone is 65°.

[0009] This utility model also provides an ultrasonic cleaning machine, including a generator, a cleaning table, and the above-mentioned piezoelectric transducer oscillator structure.

[0010] Preferably, the transducer oscillator structure is disposed on the side wall of the cleaning table, and the side wall of the cleaning table is also provided with a vessel placement platform corresponding to the transducer oscillator structure.

[0011] Preferably, the vessel placement platform can be adjusted laterally.

[0012] The beneficial effects of this utility model are: a piezoelectric transducer oscillator structure and an ultrasonic cleaner, which directly couples the container to be cleaned with an energy-focusing oscillator, provides an efficient cleaning scenario for micro-sized workpieces (such as laboratory glassware, reagent beakers, etc.), proposes a local immersion single-point directional cleaning architecture, and achieves a leap in cleaning efficiency by directly coupling the container to be cleaned with an energy-focusing oscillator, breaking through the dual reduction of cleaning agent consumption and wastewater discharge at the same time, which is in line with the sustainable development concept of green chemistry experiments. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of the piezoelectric transducer oscillator structure described in this utility model; Figure 2 This is a schematic diagram of the disassembled structure of the piezoelectric transducer oscillator structure described in this utility model; Figure 3 This is a cross-sectional structural schematic diagram of the piezoelectric transducer oscillator structure described in this utility model; Figure 4This is a schematic diagram of the oscillator amplitude transformer structure of the piezoelectric transducer oscillator structure described in this utility model; Figure 5 This is a schematic diagram of the angle of the oscillator amplitude transformer of the piezoelectric transducer oscillator structure described in this utility model; Figure 6 This is a schematic diagram of the piezoelectric ceramic ring stack structure of the piezoelectric transducer oscillator structure described in this utility model; Figure 7 This is a schematic diagram of the ultrasonic cleaning machine described in this utility model; Figure 8 This is the harmonic response diagram in Example 2.

[0015] Figure labels: 1. Oscillator amplitude transformer, 11. Conducting base, 12. First-order cone, 13. Second-order cone, 14. Third-order cone, 15. Fourth-order cone, 2. Mass cover, 31. Negative electrode plate, 32. First piezoelectric ceramic ring, 33. Positive electrode plate, 34. Second piezoelectric ceramic ring, 4. Pre-tightening bolt, 5. Insulating straight column, 6. Generator, 7. Cleaning table, 71. Mounting and fixing structure, 72. Connecting cable, 8. Vessel placement table, 81. Longitudinal plate. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0017] Example 1 like Figure 1-3 The piezoelectric transducer oscillator structure shown comprises an oscillator amplitude transformer 1, a mass cover 2, and a piezoelectric transducer structure. The piezoelectric transducer structure is composed of a negative electrode plate 31, a first piezoelectric ceramic ring 32, a positive electrode plate 33, and a second piezoelectric ceramic ring 34 stacked together. The negative electrode plate 31, the first piezoelectric ceramic ring 32, the positive electrode plate 33, and the second piezoelectric ceramic ring 34 are all ring-shaped structures, fixedly installed by pre-tightening bolts 4. The pre-tightening bolts 4 lock the mass cover 2, the piezoelectric transducer structure, and the oscillator amplitude transformer 1 together, ensuring a tight fit and forming a secure "piezoelectric ceramic ring stack." (See [reference]). Figure 6 .

[0018] Among them, the first piezoelectric ceramic ring 32 and the second piezoelectric ceramic ring 34 are piezoelectric ceramic rings, and the manufacturing process is as follows: raw material formulation and pretreatment → dry pressing or isostatic pressing → glue removal and sintering → finishing (surface grinding / inner cylindrical grinding / outer cylindrical grinding) → silver-coated electrode → oil bath polarization.

[0019] In this embodiment, see Figure 4The oscillator amplitude transformer 1 includes a transmission base 11, a first-order cone 12, a second-order cone 13, a third-order cone 14, and a fourth-order cone 15; the taper of the first-order cone 12 is greater than the taper of the second-order cone 13; the third-order cone 14 and the fourth-order cone 15 form an amplitude amplification cone head.

[0020] In this embodiment, see Figure 2 The piezoelectric transducer structure also includes an insulating straight column 5, which is inserted into the middle of the negative electrode plate 31, the first piezoelectric ceramic ring 32, the positive electrode plate 33, and the second piezoelectric ceramic ring 34. The pre-tightening bolt 4 is inserted into the insulating straight column 5 and locked to the vibrator amplitude rod 1. The mass cover 2 is provided with a countersunk screw hole.

[0021] In this embodiment, the taper of the first-order cone 12 is 12-15°, the taper of the second-order cone 13 is 3-5°, the taper of the third-order cone 14 is 130-160°, and the taper of the fourth-order cone 15 is 60-70°.

[0022] Example 2 In this embodiment, see Figure 5 The first-order cone 12 has a taper of 14°, and the second-order cone 13 has a taper of 4°. See also Figure 5 The taper of the third-order cone 14 is 155°, and the taper of the fourth-order cone 15 is 65°.

[0023] This piezoelectric transducer oscillator structure adopts a multi-step conical structure design. Its structural principle is as follows: piezoelectric ceramic ring (d33 mode resonant deformation) → metal resonator (impedance matching) → conduction base 11 conducts along the X-axis to the first-order cone 12 → the second-order cone 13, and finally the amplitude is mechanically amplified through the third-order cone 14 and the fourth-order cone 15 to form ultrasonic longitudinal wave radiation; making its key design realize local immersion single-point directional cleaning (micro-sized workpieces, experimental vessels, reagent beakers, etc.).

[0024] This structure allows for adjustment of geometric parameters (outer diameter of the main body, 12-15 mm, outer diameter and angle of each cone, and length along the X-axis of each cone). The ultrasonic transducer is analyzed using FEM (finite element method) modal and harmonic response to determine the optimal resonant frequency. The harmonic response diagram in this embodiment is shown below. Figure 8 .

[0025] Example 3 like Figure 7 The ultrasonic cleaner shown includes a generator 6, a cleaning platform 7, and a piezoelectric transducer structure as in Example 1.

[0026] The transducer oscillator structure is mounted on the side wall of the cleaning station 7. The side wall of the cleaning station 7 has a corresponding mounting and fixing structure 71 and a connecting cable 72, which electrically connects the transducer oscillator structure to the generator 6. The generator 6 controls the working state of the transducer oscillator structure. The side wall of the cleaning station 7 is also provided with a vessel placement platform 8 corresponding to the transducer oscillator structure.

[0027] The vessel placement platform 8 is designed as a laterally adjustable support plate structure, facilitating its alignment with the amplitude amplification cone of the transducer oscillator structure. Specifically, a longitudinal plate 81 with a groove is used. The longitudinal plate 81 is locked to the side wall of the washing platform 7 by screws. By loosening the screws, the lateral position of the longitudinal plate 81 in the direction of the groove can be adjusted so that the washing platform 7 adapts to the bottle opening position. One side of the longitudinal plate 81 has a bend, which forms the vessel placement platform 8. The vessel placement platform 8 can be designed with a groove structure.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A piezoelectric transducer vibrator structure, characterized by: The device includes an oscillator amplitude transformer, a mass cover, and a piezoelectric transducer structure. The piezoelectric transducer structure sequentially includes a negative electrode plate, a first piezoelectric ceramic ring, a positive electrode plate, and a second piezoelectric ceramic ring. The negative electrode plate, the first piezoelectric ceramic ring, the positive electrode plate, and the second piezoelectric ceramic ring are all ring-shaped structures and are fixedly installed by pre-tightening bolts. The pre-tightening bolts lock the mass cover, the piezoelectric transducer structure, and the oscillator amplitude transformer. The oscillator amplitude transformer includes a transmission base, a first-order cone, a second-order cone, a third-order cone, and a fourth-order cone; the taper of the first-order cone is greater than the taper of the second-order cone; the third-order cone and the fourth-order cone form an amplitude amplification cone head.

2. A piezoelectric transducer vibrator structure according to claim 1, characterized in that: The piezoelectric transducer structure also includes an insulating straight column, which is inserted into the middle of the negative electrode plate, the first piezoelectric ceramic ring, the positive electrode plate, and the second piezoelectric ceramic ring. The pre-tightening bolt is inserted into the insulating straight column and locked to the vibrator amplitude rod. The mass cover is provided with a countersunk screw hole.

3. A piezoelectric transducer vibrator structure according to claim 2, characterized in that: The taper of the first-order cone is 14°, and the taper of the second-order cone is 4°.

4. A piezoelectric transducer vibrator structure according to claim 3, characterized in that: The taper of the third-order cone is 155°, and the taper of the fourth-order cone is 65°.

5. An ultrasonic cleaning machine characterized by: It includes a generator, a cleaning station, and a piezoelectric transducer oscillator structure as described in any one of claims 1-4.

6. An ultrasonic cleaning machine as claimed in claim 5, wherein: The transducer oscillator structure is disposed on the side wall of the cleaning table, and the side wall of the cleaning table is also provided with a vessel placement platform corresponding to the transducer oscillator structure.

7. An ultrasonic cleaning machine according to claim 6, characterized in that: The vessel placement platform can be moved and adjusted laterally.

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