High-power electromagnetic piezoelectric composite transducer
By combining a piezoelectric vibration generator unit with a magnetostrictive vibration generator unit, a high-power electromagnetic piezoelectric composite transducer is formed, which solves the problem of piezoelectric transducers being easily broken under high power and achieves efficient vibration wave output and low heat generation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI YUFEI TECHNOLOGY CO LTD
- Filing Date
- 2024-11-25
- Publication Date
- 2026-06-02
Smart Images
Figure CN122124970A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a high-power transducer, and more particularly to a high-power electromagnetic-piezoelectric composite transducer. Background Technology
[0002] A high-power transducer is a device that converts electrical energy into mechanical vibration. This device is used in the processing, welding, molding, and cutting of metal and polymer materials, as well as in vibration cleaning and ultrasonic cleaning. It requires a high-power transducer and its connected tools to apply vibration waves to the workpiece being processed or cleaned.
[0003] The main problem at present is:
[0004] Existing piezoelectric transducers contain hard and brittle ceramic plates that are prone to breakage when operating under high power conditions, making it difficult for traditional piezoelectric transducers to achieve very high output power. Summary of the Invention
[0005] The purpose of this invention is to provide a high-power electromagnetic piezoelectric composite transducer that combines a piezoelectric vibration generating unit and a magnetostrictive vibration generating unit to achieve high-power vibration wave output.
[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:
[0007] A high-power electromagnetic piezoelectric composite transducer includes a bottom base, a central rod, a piezoelectric vibration generating unit, a magnetostrictive vibration generating unit, a magnetostrictive vibration generating unit drive coil, and a top cover plate.
[0008] Furthermore, the piezoelectric vibration generating unit is surrounded inside by a magnetostrictive vibration generating unit.
[0009] Furthermore, the piezoelectric vibration generating unit and the magnetostrictive vibration generating unit share the same central rod, and the central rod is surrounded by the piezoelectric vibration generating unit.
[0010] Furthermore, the central axis of the central rod coincides with the central axis of the bottom base.
[0011] Furthermore, the drive coil of the magnetostrictive vibration generating unit is wrapped around the outside of the magnetostrictive vibration generating unit.
[0012] Furthermore, the composite transducer also includes a first cooling medium housing and a second cooling medium housing, a cooling medium cavity exists between the magnetostrictive vibration generating unit drive coil and the first cooling medium housing, and a cooling medium cavity exists between the magnetostrictive vibration generating unit and the second cooling medium housing.
[0013] Furthermore, the central axes of the piezoelectric vibration generating unit and the magnetostrictive vibration generating unit are coaxial.
[0014] Furthermore, the top cover plate is in close contact with the upper surface of the magnetostrictive vibration generating unit and the upper surface of the piezoelectric vibration generating unit.
[0015] Furthermore, the piezoelectric vibration generating unit and the magnetostrictive vibration generating unit are not of equal height, and the height of the magnetostrictive vibration generating unit is greater than the height of the piezoelectric vibration generating unit.
[0016] Furthermore, the magnetostrictive vibration generating unit has non-uniform thickness in the longitudinal direction, being thicker at the top and thinner at the bottom.
[0017] The advantages of the high-power electromagnetic piezoelectric composite transducer of the present invention compared with the prior art are as follows:
[0018] 1) The high-power electromagnetic-piezoelectric composite transducer includes both a magnetostrictive vibration generator and a piezoelectric vibration generator, which can leverage the advantages of both. The magnetostrictive vibration generator does not contain hard and brittle ceramic sheets, so it is generally not damaged under high-power operating conditions. At the same time, since its hardware will not be mechanically damaged during high-power vibration, its output power can be very high. The piezoelectric vibration generator has high piezoelectric conversion efficiency, saves energy and generates very little heat when operating in low-power scenarios, and can efficiently meet the operating requirements under low-power conditions. When the magnetostrictive vibration generator and the piezoelectric vibration generator are combined, they can achieve both high power output and high electrical energy to vibration energy conversion efficiency and low heat generation in low-power scenarios.
[0019] 2) The magnetostrictive vibration generating unit surrounds the piezoelectric vibration generating unit inside it and shares the same central rod, so that the magnetostrictive vibration generating unit can output vibration waves coaxially with the piezoelectric vibration generating unit.
[0020] 3) The magnetostrictive vibration generating unit surrounds the piezoelectric vibration generating unit inside and shares the same central rod, which makes the structure of the high-power electromagnetic piezoelectric composite transducer simple and occupies less space.
[0021] 4) The magnetostrictive vibration generating unit surrounds the piezoelectric vibration generating unit inside, allowing the two to share a cooling system, reducing the complexity of the cooling system, structural complexity, cost, and space occupation of the high-power electromagnetic piezoelectric composite transducer.
[0022] 5) To achieve high-power or ultra-high-power vibration wave output, the magnetostrictive vibration generator unit needs to have a larger volume. This is because the larger the volume, the more magnetostrictive material it contains, and the higher the vibration power it can output. A magnetostrictive vibration generator unit with a greater vertical height, or even greater height than a piezoelectric vibration generator unit, can help achieve the above goal.
[0023] 6) To achieve high-power or ultra-high-power vibration wave output, the magnetostrictive vibration generator unit needs to have a large volume. This is because the larger the volume, the more magnetostrictive material it contains, and the higher the output vibration power. The "non-uniform thickness" design of the magnetostrictive vibration generator unit, which is thicker at the top and thinner at the bottom, can make full use of the empty space above the piezoelectric vibration generator unit, increasing the output power of the entire high-power electromagnetic piezoelectric composite transducer.
[0024] 7) The high-power electromagnetic piezoelectric composite transducer includes both a magnetostrictive vibration generating unit and a piezoelectric vibration generating unit, which enables the vibration wave processing equipment equipped with the high-power electromagnetic piezoelectric composite transducer to generate both low-power, high-precision vibration waves and high-power and ultra-high-power vibration waves. This allows the vibration wave processing equipment to be compatible with processing various parts with very different sizes, thicknesses and materials. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of a high-power electromagnetic piezoelectric composite transducer based on Embodiment 1 of the present invention. Figure 1 The top cover has been removed.
[0026] Figure 2 This is a schematic diagram of the structure of a high-power electromagnetic piezoelectric composite transducer based on Embodiment 1 of the present invention. Figure 2 The top cover was retained.
[0027] Figure 3 This is a schematic diagram of the structure of a high-power electromagnetic piezoelectric composite transducer based on Embodiment 2 of the present invention;
[0028] Figure 4 This is a schematic diagram of the structure of a high-power electromagnetic piezoelectric composite transducer based on Embodiment 3 of the present invention;
[0029] Figure 5 This is a perspective view of the external structure of a high-power electromagnetic piezoelectric composite transducer based on Embodiment 1 of the present invention. Detailed Implementation
[0030] The present invention will be further illustrated below with specific embodiments:
[0031] Implementation method 1:
[0032] See Figure 1 and Figure 2 This embodiment 1 provides a high-power electromagnetic piezoelectric composite transducer, which includes a bottom base 1, a central rod 2, a piezoelectric vibration generating unit 3, a magnetostrictive vibration generating unit 4, a magnetostrictive vibration generating unit drive coil 5, a top cover plate 8, a fastening nut 9, and a vibration output unit 10.
[0033] The piezoelectric vibration generating unit 3 is surrounded inside the magnetostrictive vibration generating unit 4.
[0034] The piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 share the same central rod 2, and the central rod 2 is surrounded by the piezoelectric vibration generating unit 3.
[0035] The central axis of the central rod 2 coincides with the central axis of the bottom base 1.
[0036] The magnetostrictive vibration generating unit drive coil 5 is surrounded on the outside of the magnetostrictive vibration generating unit 4.
[0037] The outer side of the magnetostrictive vibration generating unit drive coil 5 is surrounded by the first cooling medium housing 6.
[0038] The inner side of the magnetostrictive vibration generating unit 4 is surrounded by the second cooling medium housing 7.
[0039] A cooling medium cavity exists between the magnetostrictive vibration generating unit drive coil 5 and the first cooling medium housing 6, and a cooling medium cavity exists between the magnetostrictive vibration generating unit 4 and the second cooling medium housing 7. The cooling medium cavity is used for the flow of cooling medium.
[0040] The central axes of the piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 are coaxial.
[0041] The top cover plate 8 and the upper surface of the magnetostrictive vibration generating unit 4 (e.g.) Figure 1 (as indicated by the middle arrow A1) and the upper surface of the piezoelectric vibration generating unit 3 (as shown by...) Figure 1 (Indicated by the middle arrow B1) in close contact.
[0042] The top cover plate 8 is fastened by a fastening nut 9. The upper surface of the top cover plate 8 (as indicated by arrow C1 in the figure) is pressed by the fastening nut 9, which is screwed onto the center rod 2 by threads.
[0043] The bottom base 1 and the center rod 2 are integrated and are not detachable.
[0044] The bottom base 1 and the vibration output unit 10 are integrated and are not detachably connected.
[0045] Both the first cooling medium housing 6 and the second cooling medium housing 7 are provided with sealing rings or other sealing structures between them and the top cover plate 8 to prevent cooling medium leakage (the sealing rings or sealing structures are not shown in the figure).
[0046] The first cooling medium housing 6 or the top cover plate 8 is provided with several holes (not shown in the figure). These holes are used to connect the wires and the piezoelectric vibration generating unit 3, the magnetostrictive vibration generating unit 4, and the magnetostrictive vibration generating unit drive coil 5.
[0047] The working principle and internal structure of the piezoelectric vibration generating unit 3 are the same as those of the existing piezoelectric transducers. Depending on the design of its internal structure and the different input electrical signals, it can output ultrasonic vibration waves with frequencies of 20kHz and above, or vibration waves with frequencies below 20kHz. The vibration waves include various forms of periodic or specific regular waves such as sound waves, ultrasonic waves, and mechanical vibration waves.
[0048] The working principle and internal structure of the magnetostrictive vibration generating unit 4 are the same as those of the existing magnetostrictive vibration transducer. Depending on the design of its internal structure and the different input electrical signals, it can output ultrasonic vibration waves with frequencies of 20kHz and above, or vibration waves with frequencies below 20kHz.
[0049] The piezoelectric vibration generating unit 3 may be reinforced with shims, other thickness compensation parts, or other fastening parts as needed on its upper surface to ensure that the piezoelectric vibration generating unit 3 is fully compressed.
[0050] The upper surface of the magnetostrictive vibration generating unit 4 may be fitted with shims, other thickness compensation parts, or other fastening parts as needed, so that the magnetostrictive vibration generating unit 4 is fully compressed.
[0051] In other embodiments, depending on actual needs, an additional layer of magnetostrictive vibration generating unit drive coil can be added inside the magnetostrictive vibration generating unit 4, so that the magnetostrictive vibration generating unit 4 is more fully surrounded by the electromagnetic field, thereby increasing the output power and improving the electrical energy to vibration energy conversion efficiency.
[0052] See Figure 5 , Figure 5 The image shows the overall external structure and perspective view of the composite transducer.
[0053] Implementation Method 2:
[0054] See Figure 3This embodiment 2 provides a high-power electromagnetic piezoelectric composite transducer, which includes a bottom base 1, a central rod 2, a piezoelectric vibration generating unit 3, a magnetostrictive vibration generating unit 4, a magnetostrictive vibration generating unit drive coil 5, a top cover plate 8, a fastening nut 9, and a vibration output unit 10.
[0055] The piezoelectric vibration generating unit 3 is surrounded inside the magnetostrictive vibration generating unit 4.
[0056] The piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 share the same central rod 2, and the central rod 2 is surrounded by the piezoelectric vibration generating unit 3.
[0057] The central axis of the central rod 2 coincides with the central axis of the bottom base 1.
[0058] The magnetostrictive vibration generating unit drive coil 5 is surrounded on the outside of the magnetostrictive vibration generating unit 4.
[0059] The outer side of the magnetostrictive vibration generating unit drive coil 5 is surrounded by the first cooling medium housing 6.
[0060] The inner side of the magnetostrictive vibration generating unit 4 is surrounded by the second cooling medium housing 7.
[0061] A cooling medium cavity exists between the magnetostrictive vibration generating unit drive coil 5 and the first cooling medium housing 6, and a cooling medium cavity exists between the magnetostrictive vibration generating unit 4 and the second cooling medium housing 7. The cooling medium cavity is used for the flow of cooling medium.
[0062] The central axes of the piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 are coaxial.
[0063] The top cover plate 8 is in close contact with the upper surface of the magnetostrictive vibration generating unit 4.
[0064] The cover plate 11 of the piezoelectric vibration generating unit is in close contact with the upper surface of the piezoelectric vibration generating unit 3.
[0065] The top cover plate 8 is fastened by a fastening nut 9. The upper surface of the top cover plate 8 is pressed by the fastening nut 9, which is screwed onto the center rod 2 by threads.
[0066] The piezoelectric vibration generating unit 3 is fastened by a fastening nut 9. The upper surface of the piezoelectric vibration generating unit 3 is pressed by the fastening nut 9, which is screwed onto the center rod 2 by threads.
[0067] The bottom base 1 and the center rod 2 are integrated and are not detachable.
[0068] The bottom base 1 and the vibration output unit 10 are integrated and are not detachably connected.
[0069] A sealing ring or other sealing structure is provided between the first cooling medium housing 6 and the second cooling medium housing 7 and the top cover plate 8 to prevent cooling medium leakage (the sealing ring or sealing structure is not shown in the figure).
[0070] The first cooling medium housing 6 or the top cover plate 8 is provided with several holes (not shown in the figure) for connecting the wires and the piezoelectric vibration generating unit 3, the magnetostrictive vibration generating unit 4, and the magnetostrictive vibration generating unit drive coil 5.
[0071] The piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 are not of equal height, and the height of the magnetostrictive vibration generating unit 4 is greater than the height of the piezoelectric vibration generating unit 3.
[0072] The advantage of this design is that, in order to achieve high-power or ultra-high-power vibration wave output, the magnetostrictive vibration generating unit 4 needs to have a larger volume. This is because the larger the volume, the more magnetostrictive material it contains, and the higher the vibration power it can output. A greater vertical height for the magnetostrictive vibration generating unit 4 further helps achieve this goal.
[0073] The working principle and internal structure of the piezoelectric vibration generating unit 3 are the same as those of the existing piezoelectric transducers. Depending on the design of its internal structure and the different input electrical signals, it can output ultrasonic vibration waves with frequencies of 20kHz and above, or vibration waves with frequencies below 20kHz. The vibration waves include various forms of periodic or specific regular waves such as sound waves, ultrasonic waves, and mechanical vibration waves.
[0074] The working principle and internal structure of the magnetostrictive vibration generating unit 4 are the same as those of the existing magnetostrictive vibration transducer. Depending on the design of its internal structure and the different input electrical signals, it can output ultrasonic vibration waves with frequencies of 20kHz and above, or vibration waves with frequencies below 20kHz.
[0075] The piezoelectric vibration generating unit 3 may be reinforced with shims, other thickness compensation parts, or other fastening parts as needed on its upper surface to ensure that the piezoelectric vibration generating unit 3 is fully compressed.
[0076] The upper surface of the magnetostrictive vibration generating unit 4 may be fitted with shims, other thickness compensation parts, or other fastening parts as needed, so that the magnetostrictive vibration generating unit 4 is fully compressed.
[0077] In other embodiments, depending on actual needs, an additional layer of magnetostrictive vibration generating unit drive coil can be added inside the magnetostrictive vibration generating unit 4, so that the magnetostrictive vibration generating unit 4 is more fully surrounded by the electromagnetic field, thereby increasing the output power and improving the electrical energy to vibration energy conversion efficiency.
[0078] Implementation Method 3:
[0079] See Figure 4 This embodiment 3 provides a high-power electromagnetic piezoelectric composite transducer, which includes a bottom base 1, a central rod 2, a piezoelectric vibration generating unit 3, a magnetostrictive vibration generating unit 4, a magnetostrictive vibration generating unit drive coil 5, a top cover plate 8, a fastening nut 9, and a vibration output unit 10.
[0080] The piezoelectric vibration generating unit 3 is surrounded inside the magnetostrictive vibration generating unit 4.
[0081] The piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 share the same central rod 2, and the central rod 2 is surrounded by the piezoelectric vibration generating unit 3.
[0082] The central axis of the central rod 2 coincides with the central axis of the bottom base 1.
[0083] The magnetostrictive vibration generating unit drive coil 5 is surrounded on the outside of the magnetostrictive vibration generating unit 4.
[0084] The outer side of the magnetostrictive vibration generating unit drive coil 5 is surrounded by the first cooling medium housing 6.
[0085] The inner side of the magnetostrictive vibration generating unit 4 is surrounded by the second cooling medium housing 7.
[0086] A cooling medium cavity exists between the magnetostrictive vibration generating unit drive coil 5 and the first cooling medium housing 6, and a cooling medium cavity exists between the magnetostrictive vibration generating unit 4 and the second cooling medium housing 7. The cooling medium cavity is used for the flow of cooling medium.
[0087] The central axes of the piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 are coaxial.
[0088] The top cover plate 8 is in close contact with the upper surface of the magnetostrictive vibration generating unit 4.
[0089] The cover plate 11 of the piezoelectric vibration generating unit is in close contact with the upper surface of the piezoelectric vibration generating unit 3.
[0090] The top cover plate 8 is fastened by a fastening nut 9. The upper surface of the top cover plate 8 is pressed by the fastening nut 9, which is screwed onto the center rod 2 by threads.
[0091] The piezoelectric vibration generating unit 3 is fastened by a fastening nut 9. The upper surface of the piezoelectric vibration generating unit 3 is pressed by the fastening nut 9, which is screwed onto the center rod 2 by threads.
[0092] The bottom base 1 and the center rod 2 are integrated and are not detachable.
[0093] The bottom base 1 and the vibration output unit 10 are integrated and are not detachably connected.
[0094] A sealing ring or other sealing structure is provided between the first cooling medium housing 6 and the second cooling medium housing 7 and the top cover plate 8 to prevent cooling medium leakage (the sealing ring or sealing structure is not shown in the figure).
[0095] The first cooling medium housing 6 or the top cover plate 8 is provided with several holes (not shown in the figure) for connecting the wires and the piezoelectric vibration generating unit 3, the magnetostrictive vibration generating unit 4, and the magnetostrictive vibration generating unit drive coil 5.
[0096] The piezoelectric vibration generating unit 3 and the magnetostrictive vibration generating unit 4 are not at the same height, and the height of the magnetostrictive vibration generating unit 4 is greater than the height of the piezoelectric vibration generating unit 3.
[0097] The advantage of this design is that, in order to achieve high-power or ultra-high-power vibration wave output, the magnetostrictive vibration generating unit 4 needs to have a larger volume. This is because the larger the volume, the more magnetostrictive material it contains, and the higher the vibration power it can output. A greater vertical height for the magnetostrictive vibration generating unit 4 further helps achieve this goal.
[0098] The magnetostrictive vibration generating unit 4 has non-uniform thickness in the longitudinal direction, being thicker at the top and thinner at the bottom.
[0099] The beneficial effect of this design is that, in order to achieve high-power or ultra-high-power vibration wave output, the magnetostrictive vibration generating unit 4 needs to have a larger volume, because the larger the volume, the more magnetostrictive material it contains, and the higher the vibration power that can be output. The design of "the magnetostrictive vibration generating unit 4 having non-uniform thickness in the longitudinal direction, being thicker at the top and thinner at the bottom" can make full use of the empty space above the piezoelectric vibration generating unit 3, increasing the output power of the entire high-power electromagnetic piezoelectric composite transducer.
[0100] The working principle and internal structure of the piezoelectric vibration generating unit 3 are the same as those of the existing piezoelectric transducers. Depending on the design of its internal structure and the different input electrical signals, it can output ultrasonic vibration waves with frequencies of 20kHz and above, or vibration waves with frequencies below 20kHz. The vibration waves include various forms of periodic or specific regular waves such as sound waves, ultrasonic waves, and mechanical vibration waves.
[0101] The working principle and internal structure of the magnetostrictive vibration generating unit 4 are the same as those of the existing magnetostrictive vibration transducer. Depending on the design of its internal structure and the different input electrical signals, it can output ultrasonic vibration waves with frequencies of 20kHz and above, or vibration waves with frequencies below 20kHz.
[0102] The piezoelectric vibration generating unit 3 may be reinforced with shims, other thickness compensation parts, or other fastening parts as needed on its upper surface to ensure that the piezoelectric vibration generating unit 3 is fully compressed.
[0103] The upper surface of the magnetostrictive vibration generating unit 4 may be fitted with shims, other thickness compensation parts, or other fastening parts as needed, so that the magnetostrictive vibration generating unit 4 is fully compressed.
[0104] In other embodiments, depending on actual needs, an additional layer of magnetostrictive vibration generating unit drive coil can be added inside the magnetostrictive vibration generating unit 4, so that the magnetostrictive vibration generating unit 4 is more fully surrounded by the electromagnetic field, thereby increasing the output power and improving the electrical energy to vibration energy conversion efficiency.
[0105] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A high-power electromagnetic piezoelectric composite transducer, characterized in that: The high-power electromagnetic piezoelectric composite transducer includes a bottom base (1), a central rod (2), a piezoelectric vibration generating unit (3), a magnetostrictive vibration generating unit (4), a magnetostrictive vibration generating unit drive coil (5), and a top cover plate (8).
2. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The piezoelectric vibration generating unit (3) is surrounded inside the magnetostrictive vibration generating unit (4).
3. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The piezoelectric vibration generating unit (3) and the magnetostrictive vibration generating unit (4) share the same central rod (2), and the central rod (2) is surrounded by the piezoelectric vibration generating unit (3).
4. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The central axis of the central rod (2) coincides with the central axis of the bottom base (1).
5. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The magnetostrictive vibration generating unit drive coil (5) is surrounded on the outside of the magnetostrictive vibration generating unit (4).
6. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The composite transducer also includes a first cooling medium housing (6) and a second cooling medium housing (7). A cooling medium cavity exists between the magnetostrictive vibration generating unit drive coil (5) and the first cooling medium housing (6). There is a cooling medium cavity between the magnetostrictive vibration generating unit (4) and the second cooling medium housing (7).
7. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The central axes of the piezoelectric vibration generating unit (3) and the magnetostrictive vibration generating unit (4) are coaxial.
8. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The top cover (8) is in close contact with the upper surface of the magnetostrictive vibration generating unit (4) and the upper surface of the piezoelectric vibration generating unit (3).
9. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The piezoelectric vibration generating unit (3) and the magnetostrictive vibration generating unit (4) are not at the same height, and the height of the magnetostrictive vibration generating unit (4) is greater than the height of the piezoelectric vibration generating unit (3).
10. The high-power electromagnetic piezoelectric composite transducer according to claim 1, characterized in that: The magnetostrictive vibration generating unit (4) has non-uniform thickness in the longitudinal direction, being thicker at the top and thinner at the bottom.