CN117415002A - Strong sound generating device - Google Patents
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- CN117415002A CN117415002A CN202311440019.3A CN202311440019A CN117415002A CN 117415002 A CN117415002 A CN 117415002A CN 202311440019 A CN202311440019 A CN 202311440019A CN 117415002 A CN117415002 A CN 117415002A
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 64
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- 230000005284 excitation Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 239000011257 shell material Substances 0.000 description 77
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
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- 230000008569 process Effects 0.000 description 4
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- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
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- 229910000639 Spring steel Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
- B06B1/12—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
- B06B1/12—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses
- B06B1/14—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses the masses being elastically coupled
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- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a strong sound generating device which comprises a motor, a screw rod, a threaded sleeve, a sliding block, a loading rod, a base, a motor bracket, a sliding rail, a connecting frame, a back cavity, a horn, an electromagnet and a thin shell, wherein the screw rod is arranged on the motor bracket; the motor and the electromagnet are used as driving control parts, and the thin shell, the horn and the back cavity are used as sound producing parts; the horn is a circular section index horn and is fixedly connected with the thin shell and the back cavity; the electromagnet is used for applying displacement load to the top of the thin shell and releasing the displacement load, and is magnetic in an electrified state, so that the top of the thin shell can be firmly adsorbed, and the displacement load is applied to the top of the thin shell; the device is nonmagnetic in the power-off state, and can release the displacement load applied to the top of the thin shell; the thin shell is hemispherical, is fixedly connected with the horn and the back cavity, can generate elastic large deformation by applying displacement load through the electromagnet, and can generate excitation by releasing rebound of the displacement load through the electromagnet, so that high-strength acoustic pulse is generated. The invention has the advantages of high sounding strength, good controllability and high stability.
Description
Technical Field
The invention belongs to the technical field of acoustics, and particularly relates to a strong sound generating device.
Background
The strong sound is a sound wave with large amplitude and high intensity, can be used for strong noise environment test, high sound pressure sound absorption/insulation test, airport bird expelling, acoustic cleaning and the like, and has important application in the fields of aerospace, national defense and military industry and the like. The formation and application of the intense sound is based on an intense sound generating device (or intense sound transducer). The megasonic generating means can be broadly classified into three types according to energy conversion means: chemical energy, electrical energy (electroacoustic) and fluid megasonic generating means. The chemical energy strong sound generating device can generate sound by utilizing huge energy generated by explosion or detonation, and can generate ultra-high power strong sound waves; the electric energy strong sound generating device drives the sound membrane to vibrate and sound by utilizing electromagnetic or piezoelectric coupling, so that the amplitude and frequency of sound waves can be accurately controlled; the fluid strong sound generating device discharges the fluid such as compressed air, high-pressure steam or fuel gas in a controlled way and excites the vibration of surrounding media, and continuous sound waves with required frequency bands and strength can be formed. The structure of the chemical energy strong sound generating device is complex, the sound generating intensity is weak in controllability, and the application scene is relatively limited; the energy conversion rate of the electric energy strong sound generating device is low, the requirements on the structure and the materials are high, the strength of the excited sound waves is limited, the sound pressure level can be improved through the sound array, but the cost of the large array is high, and the income is relatively low; the fluid strong sound generating device generally needs to be provided with a high-pressure air pump to finish sound production, has higher matching cost and huge system, and is mainly applied to indoor strong sound. The novel strong sound generating device is still to be further explored.
Disclosure of Invention
The invention aims to provide a strong sound generating device with high sound generating intensity, good controllability and high stability.
One aspect of the invention provides a strong sound generating device, which comprises a motor, a screw rod, a threaded sleeve, a sliding block, a loading rod, a base, a motor bracket, a sliding rail, a connecting frame, a back cavity, a horn, an electromagnet and a thin shell;
the motor is fixed on the motor bracket and used for driving the screw rod to rotate;
the screw rod is connected with the motor and the threaded sleeve and can rotate positively and reversely under the drive of the motor, so that the threaded sleeve is driven to generate specified displacement along the axial direction of the threaded sleeve;
the threaded sleeve is fixedly connected with the sliding block and is used for driving the sliding block to move;
the lower end of the sliding block is arranged on the sliding rail, and the upper end of the sliding block is connected with one end of the loading rod and used for moving along the sliding rail under the action of the threaded sleeve;
the other end of the loading rod is fixedly connected with the electromagnet and is used for driving the electromagnet to move;
the base is fixedly connected with the motor bracket and the connecting frame;
the sliding rail is fixed on the motor bracket and used for enabling the sliding block to move along a straight line;
the bottom of the connecting frame is fixed on the base, and the side surface of the connecting frame is fixedly connected with the back cavity;
a round hole is formed in the center of one side of the back cavity, the loading rod penetrates through the round hole, and the other side of the back cavity is opened and is fixedly connected with the thin shell;
the horn is a circular section index horn and is fixedly connected with the thin shell and the back cavity;
the electromagnet is used for applying displacement load to the top of the thin shell and releasing the displacement load, is magnetic in an electrified state, can firmly adsorb the top of the thin shell, and applies the displacement load to the top of the thin shell; non-magnetic in the de-energized state, capable of releasing a displacement load applied to the top of the thin shell;
the thin shell is hemispherical and is fixedly connected with the horn and the back cavity, the elastic large deformation can be generated by applying displacement load through the electromagnet, and the high-strength acoustic pulse is generated by releasing the rebound of the displacement load and the excitation of the displacement load through the electromagnet.
Preferably, the threaded sleeve is provided with an internal thread, the internal thread is mutually screwed with the thread of the screw rod, a through hole is formed in the side face of the threaded sleeve, and the threaded sleeve is fixedly connected with the sliding block through the through hole.
Preferably, one end of the loading rod is provided with an external thread, the other end of the loading rod is provided with an internal thread, the loading rod is fixedly connected with the sliding block through the external thread, and the loading rod is fixedly connected with the electromagnet through the internal thread.
Preferably, the motor support is provided with a vertical plate and a bottom plate, the vertical plate is fixedly connected with the motor, and the bottom plate is fixedly connected with the sliding rail.
Preferably, the thickness of the thin shell is less than or equal to 1/500 of the radius of curvature of the thin shell, and the material is steel or iron.
Preferably, the winding coefficient of the horn is smaller than 10, the length of the horn is larger than or equal to the height of the thin shell, and the material is metal or composite material.
Preferably, the radius of the back cavity is the same as that of the thin shell, and the material is metal or composite material.
Preferably, the electromagnet has axisymmetric characteristics, has strong magnetism in an energized state, and can firmly adsorb the top of the thin shell.
Preferably, the thin shell is hemispherical, the opening end of the thin shell is round, two sides of the opening end are respectively and fixedly connected with the horn and the back cavity, and the curvature radius is constant in a state of not being loaded.
The strong sound generating device has the advantages of high sound generating intensity, good controllability and high stability.
Drawings
For a clearer description of the technical solutions of the present invention, the following description will be given with reference to the attached drawings used in the description of the embodiments of the present invention, it being obvious that the attached drawings in the following description are only some embodiments of the present invention, and that other attached drawings can be obtained by those skilled in the art without the need of inventive effort:
FIG. 1 is a schematic view showing the overall structure of a strong sound generating apparatus according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a sound emitting portion of one embodiment of the present invention;
FIG. 3 is a schematic view of a back cavity of an embodiment of the present invention;
FIG. 4 is a schematic view of a horn according to one embodiment of the present invention;
FIG. 5 is a schematic view of a thin shell of one embodiment of the present invention;
FIG. 6 is a graph of load displacement versus branch reaction force for a thin shell under steady state loading in accordance with one embodiment of the present invention;
FIG. 7 is a graph of the maximum sound pressure generated by a thin shell of one embodiment of the present invention after release of various loading displacements;
fig. 8 is a graph of the maximum sound pressure level produced by a thin shell of one embodiment of the present invention after release of different loading displacements.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a strong sound generating device, which comprises a motor 1, a screw rod 2, a threaded sleeve 3, a sliding block 4, a loading rod 5, a base 6, a motor bracket 7, a sliding rail 8, a connecting frame 9, a back cavity 10, a horn 11, an electromagnet 12 and a thin shell 13 as shown in fig. 1-5. Wherein, motor 1, electro-magnet 12 are as drive control part, and shell 13, horn 11 and back chamber 10 are as sound producing part, and lead screw 2, screw sleeve 3, slider 4, loading rod 5 are as load transmission part, and base 6, motor support 7, link 9, slide rail 8 are as support, fixed and connecting portion.
The motor 1 can be controlled in forward rotation, reverse rotation and step by step for driving the screw rod 2 to rotate, and is fixed to the motor bracket 7 by screws. The screw rod 2 is connected with the motor 1 and the threaded sleeve 3, and is driven by the motor 1 to rotate positively and reversely, so that the threaded sleeve 3 can be driven to generate specified displacement along the axial direction. The threaded sleeve 3 is connected with the screw rod 2 and the sliding block 4, the internal threads of the threaded sleeve are mutually screwed with the screw rod 2, and the side surface of the threaded sleeve is provided with a through hole which is fixedly connected with the sliding block 4 through a screw, so that the sliding block 4 can be driven to move. The lower end of the sliding block 4 is arranged on the sliding rail 8, the upper end of the sliding block is connected with one end of the loading rod 5 through a threaded hole, and the sliding block moves along the sliding rail 8 under the action of the threaded sleeve 3. One end of the loading rod 5 is provided with external threads, the other end of the loading rod 5 is provided with internal threads, one end of the loading rod 5 is fixedly connected with the sliding block 4 through the external threads, and the other end of the loading rod is fixedly connected with the electromagnet 12 through the internal threads.
The base 6 is used for supporting and fixing the whole device, and is fixedly connected with the motor bracket 7 and the connecting frame 9 through screws. The motor bracket 7 is fixed to the base 6 by screws. The motor bracket 7 has a vertical plate and a bottom plate, the vertical plate is connected with the motor 1 through screw fastening, and the bottom plate is connected with the sliding rail 8 through screw fastening.
The slide rail 8 is fixed on the motor bracket 7 by a screw, and the slide block 4 is arranged above the slide rail, so that the slide block 4 moves along a straight line. The bottom of the connecting frame 9 is fixed on the base 6, and the side surfaces are connected with the back cavity 10 by screw fastening. The back cavity 10 is fixed on the connecting frame 9, a round hole is formed in the center of one side wall surface connected with the connecting frame 9, the loading rod 5 penetrates through the round hole, the other side of the back cavity 10 is opened, and the loading rod is connected with the thin shell 13 through screw fastening.
The horn 11 is a circular section index horn and is fixedly connected with the thin shell 13 and the back cavity 10 through screws. The electromagnet 12 is fixedly connected with the loading rod 5 through threads and is used for applying displacement load to the top of the thin shell 13 and releasing the displacement load, the electromagnet is controlled to be magnetic through electrifying and powering off, and the electromagnet is magnetic in an electrifying state and can firmly adsorb the top of the thin shell 13 and apply the displacement load to the top of the thin shell 13; no magnetism is provided in the power-off state, no force is applied to the top of the thin shell 13, and the displacement load applied to the top of the thin shell 13 can be released.
The thin shell 13 is hemispherical and is fixedly connected with the horn 11 and the back cavity 10 through screws. The thin shell 13 can be elastically deformed by the application of the displacement load by the electromagnet 12, and the displacement load is released by the electromagnet 12 to rebound and excite, thereby generating high-intensity acoustic pulses. The open end of the thin shell 13 is circular, two sides of the open end are fixedly connected with the horn 11 and the back cavity 10 respectively, and the curvature radius of the thin shell 13 is constant in the state of no load. The thickness of the thin shell 13 is less than or equal to 1/500 of the radius of curvature thereof, and the material is steel or iron. The horn 11 has a serpentine coefficient of less than 10 and a length greater than or equal to the height of the thin shell 13, and is made of metal or composite material. The radius of the back cavity 10 is the same as that of the thin shell 13, and the material is metal or composite material. The electromagnet 12 has axisymmetric characteristics, has ferromagnetic properties in the energized state, and can firmly attract the top of the thin case 13.
The working process of the strong sound generating device of the embodiment of the invention is as follows:
the motor 1 controls the forward and reverse rotation of the screw rod 2, the screw rod 2 and the threaded sleeve 3 rotate relatively (the threaded sleeve 3 does not rotate), the threaded sleeve 3 moves axially under the action of the screw rod 2, and the displacement and direction of the threaded sleeve 3 can be controlled through the rotation angle and the steering of the screw rod 2. The threaded sleeve 3 transmits displacement to the sliding block 4, the sliding block 4 is constrained by the sliding rail 8 to perform linear motion, the sliding block 4 transmits the linear displacement to the electromagnet 12 through the loading rod 5, and when the electromagnet 12 moves to the top of the thin shell 13, the electromagnet 12 starts to be electrified, so that the electromagnet 12 and the top of the thin shell 13 are firmly adsorbed. Then, the motor 1 controls the screw rod 2 to reversely rotate, the top of the thin shell 13 is subjected to reverse displacement loading under the action of the electromagnet 12 and the loading rod 5, the thin shell 13 is elastically deformed greatly, the electromagnet 12 is powered off after the thin shell 13 is loaded to a preset position, and the thin shell 13 rebounds and vibrates to excite acoustic pulses. Repeating the above process may continue to excite the acoustic pulse.
In one embodiment, the motor 1 rotates the electromagnet 12, and the electromagnet 12 applies a load to the thin shell 13 by magnetic force. The rotation angle of the motor 1 is proportional to the displacement of the electromagnet 12, and a unique corresponding relation exists between the rotation angle value of the motor 1 and the displacement value of the electromagnet 12. Firstly, the current rotation angle value of the motor 1 is obtained, and if the electromagnet 12 is required to be driven to move to a specified position, the motor 1 is only required to be controlled to rotate to a corresponding angle. The initial state rotation angle of the motor 1 is zero, which corresponds to a fixed distance of the electromagnet 12 from the top of the thin shell 13. When a load is applied to the thin shell 13, the motor 1 is rotated from an initial state to a fixed angle (determined by a fixed distance value at the top of the thin shell 13) to bring the electromagnet 12 into contact with the top of the thin shell 13, then the electromagnetic electricity 12 is supplied to firmly adsorb the top of the thin shell 13, and finally the motor 1 is rotated to a specific angle (determined by the loading requirement) to move the electromagnet 12 to the pre-loading position. The electromagnet 12 is powered off, the thin shell 13 rebounds and vibrates at a high speed, and strong pulse sound waves are excited to finish one-time loading. After each excitation of the intense sound pulse, the motor 1 rotates to an initial state (zero rotation angle), and the subsequent loading process is the same as the process.
In summary, in the sound generating device according to the embodiment of the present invention, the thin shell 13 is a core sound generating component, the thin shell 13 is elastically deformed in a steady state under the action of the loading rod 5, the thin shell 13 vibrates at a high speed after the load is released, and when the thin shell 13 rebounds to the vicinity of the equilibrium position, excitation occurs, and the kinetic energy of the thin shell 13 is largely converted into acoustic energy in a very short time, and a high-intensity acoustic pulse is generated; the horn 11 is used for improving the impedance matching performance of the whole device and the outside, so that the sound waves in the device can radiate to the outside more efficiently; the back cavity 10 is used for blocking back propagation sound waves and improving forward sound wave intensity; the motor 1 and the electromagnet 12 can apply accurate displacement load to the thin shell 13, and can repeatedly load excitation sound pulses.
The strong sound generating device provided by the embodiment of the invention utilizes the elastic large deformation pre-stored energy of the thin shell, enables the thin shell to oscillate at high speed by rapidly releasing the elastic potential energy, and utilizes the strong nonlinearity of the hemispherical thin shell near the equilibrium state to generate excitation so as to excite high-intensity pulse sound waves, thereby having the advantages of high sound intensity, good controllability, high stability and the like.
The maximum sound pressure and sound pressure level generated after the hemispherical thin shell is subjected to stable loading response and loading release are analyzed through simulation calculation examples, so that the effect of the strong sound generating device in the embodiment of the invention is verified.
Calculation model:
the calculation example selects two-dimensional axisymmetric modeling in the software space dimension through finite element software COMSOL simulation calculation, and selects a fluid-solid coupling physical field for steady state and transient state research analysis. The simulation analysis is integrally divided into two steps, firstly, axial displacement load is applied to the top of the thin shell to perform steady-state response analysis, and axial branch counter forces of the bottom (constrained) of the thin shell under different displacement loads are extracted; and then taking a steady-state simulation result as an initial state, releasing the displacement load for transient analysis, and extracting the maximum sound pressure and the sound pressure level excited by the front of the top of the thin shell (on an axisymmetric line), wherein geometric nonlinearity is opened in both research steps. Setting the fluid medium in the field as air in the simulation, selecting spring steel as a thin shell material, applying fixed displacement constraint to the boundary of the bottom of the thin shell, wherein the radius of curvature of the thin shell is 150mm, the thickness of the thin shell is 0.3mm, and the distance between the maximum sound pressure and the sound pressure level extraction point is 30mm from the top of the thin shell; the back cavity and the wall surface of the horn are both set as hard boundaries, the thickness of the back cavity is 20mm, the length of the horn is 200mm, the winding coefficient is 0.8, and the front end of the horn is provided with a fluid opening boundary.
Calculation results:
fig. 6 shows a reaction curve of the loading displacement of the thin shell in steady state simulation. Overall trend: the whole supporting reaction force is increased along with the increase of the loading displacement, the supporting reaction force and the loading displacement show a nonlinear change relation, and when the loading displacement is changed from 0mm to 100mm, the supporting reaction force is increased from 0kN to about 1.2kN. When the loading displacement is small, the branch counter force increases sharply along with the increase of the loading displacement, and reaches a local peak value rapidly, and then the branch counter force changes in positive correlation along with the loading displacement. The results show that the force displacement curve slope of the thin shell near the equilibrium position is extremely large, which proves that the rigidity is extremely large and is far larger than the position with larger displacement. If the thin shell is released after being loaded, when the thin shell rebounds to the vicinity of the balance position, the thin shell is excited due to the rapid increase of rigidity, and the kinetic energy of the thin shell is largely converted into acoustic energy, so that high-intensity acoustic pulses are excited. In addition, as known from the loading displacement-branch reaction curve, the thin shell can prestoring a large amount of elastic potential energy under displacement loading, and the magnitude of prestoring energy can be directly regulated and controlled through loading displacement.
Fig. 7 shows the maximum sound pressure excited by the thin shell at different loading displacements in the transient simulation. The maximum sound pressure varies in positive correlation with the loading displacement, and when the loading displacement increases from 5mm to 80mm (the increment is 5 mm), the maximum sound pressure generated by the thin shell increases from 4kPa to about 58kPa, wherein the maximum sound pressures excited when the loading displacement is 20mm, 40mm, 60mm, 80mm are 19.9kPa, 33.9kPa, 46kPa, 57.4kPa, respectively. The maximum sound pressure level generated by the corresponding loading displacement is increased with the increase of the loading displacement, but the change trend is gradually gentle, and when the loading displacement is increased from 5mm to 80mm, the maximum sound pressure level generated by the thin shell is increased from 167dB to about 190dB, wherein the maximum sound pressure levels generated by the loading displacement is respectively 179.9dB, 184.6dB, 187.3dB and 189.2dB when the loading displacement is 20mm, 40mm, 60mm and 80 mm. The result shows that the hemispherical thin shell of the embodiment of the invention can generate high-intensity sound waves, and the intensity of the generated sound waves can be regulated and controlled through loading displacement.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (9)
1. The strong sound generating device is characterized by comprising a motor, a screw rod, a threaded sleeve, a sliding block, a loading rod, a base, a motor bracket, a sliding rail, a connecting frame, a back cavity, a horn, an electromagnet and a thin shell;
the motor is fixed on the motor bracket and used for driving the screw rod to rotate;
the screw rod is connected with the motor and the threaded sleeve and can rotate positively and reversely under the drive of the motor, so that the threaded sleeve is driven to generate specified displacement along the axial direction of the threaded sleeve;
the threaded sleeve is fixedly connected with the sliding block and is used for driving the sliding block to move;
the lower end of the sliding block is arranged on the sliding rail, and the upper end of the sliding block is connected with one end of the loading rod and used for moving along the sliding rail under the action of the threaded sleeve;
the other end of the loading rod is fixedly connected with the electromagnet and is used for driving the electromagnet to move;
the base is fixedly connected with the motor bracket and the connecting frame;
the sliding rail is fixed on the motor bracket and used for enabling the sliding block to move along a straight line;
the bottom of the connecting frame is fixed on the base, and the side surface of the connecting frame is fixedly connected with the back cavity;
a round hole is formed in the center of one side of the back cavity, the loading rod penetrates through the round hole, and the other side of the back cavity is opened and is fixedly connected with the thin shell;
the horn is a circular section index horn and is fixedly connected with the thin shell and the back cavity;
the electromagnet is used for applying displacement load to the top of the thin shell and releasing the displacement load, is magnetic in an electrified state, can firmly adsorb the top of the thin shell, and applies the displacement load to the top of the thin shell; non-magnetic in the de-energized state, capable of releasing a displacement load applied to the top of the thin shell;
the thin shell is hemispherical and is fixedly connected with the horn and the back cavity, the elastic large deformation can be generated by applying displacement load through the electromagnet, and the high-strength acoustic pulse is generated by releasing the rebound of the displacement load and the excitation of the displacement load through the electromagnet.
2. The sound generating apparatus of claim 1, wherein the screw sleeve has an internal screw thread which is screwed with the screw thread of the screw rod, and a through hole is formed at a side surface of the screw sleeve, and is fastened to the slider through the through hole.
3. The sound generating apparatus according to claim 1 or 2, wherein one end of the loading rod has an external thread and the other end has an internal thread, and the loading rod is fastened to the slider via the external thread and is fastened to the electromagnet via the internal thread.
4. A megasonic generating apparatus according to any one of claims 1 to 3 wherein the motor mount has a riser and a base plate, the riser being in secure connection with the motor and the base plate being in secure connection with the slide rail.
5. The loud sound generating device of any one of claims 1-4 wherein the thin shell has a thickness of less than or equal to 1/500 of its radius of curvature and is of steel or iron.
6. The sound generating apparatus of any one of claims 1-5, wherein the horn has a serpentine coefficient of less than 10 and a length of greater than or equal to the height of the thin shell, the material being a metal or composite material.
7. The sound generating apparatus of any one of claims 1-6, wherein the back cavity has a radius equal to a radius of the thin shell, and the material is a metal or a composite material.
8. The device according to any one of claims 1 to 7, wherein the electromagnet has axisymmetric characteristics, and is ferromagnetic in an energized state, and is capable of firmly attracting the top portion of the thin shell.
9. The apparatus according to any one of claims 1 to 8, wherein,
the thin shell is hemispherical, the opening end of the thin shell is round, two sides of the opening end are respectively fixedly connected with the horn and the back cavity, and the curvature radius is constant in a state of not being loaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311440019.3A CN117415002A (en) | 2023-11-01 | 2023-11-01 | Strong sound generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311440019.3A CN117415002A (en) | 2023-11-01 | 2023-11-01 | Strong sound generating device |
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| Publication Number | Publication Date |
|---|---|
| CN117415002A true CN117415002A (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311440019.3A Pending CN117415002A (en) | 2023-11-01 | 2023-11-01 | Strong sound generating device |
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| Country | Link |
|---|---|
| CN (1) | CN117415002A (en) |
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2023
- 2023-11-01 CN CN202311440019.3A patent/CN117415002A/en active Pending
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