Electromagnetic underwater sound transducer

Abstract

The present application relates to a kind of electromagnetic underwater acoustic transducers, including shell, it is arranged in liquid-filled pipeline;Displacement amplifier module is arranged in shell, displacement amplifier module includes drive panel, oil cylinder and radiation panel, radiation panel is retractably arranged below oil cylinder, radiation panel side and liquid in liquid-filled pipeline contact, drive panel is retractably arranged above oil cylinder;Water pressure balancer module is arranged above drive panel;Electromagnetic actuator module is arranged in shell and is outside water pressure balancer module.The present application passes through water pressure balancer module and transmits the hydraulic pressure outside shell to drive panel, so that the drive panel and radiation panel on both sides of oil cylinder keep hydraulic balance, in through electromagnetic actuator module drive keep hydraulic balance after the drive panel and radiation panel movement, make radiation panel emit amplitude opposite, phase same acoustic wave to offset noise, so that transducer can eliminate sound in the pipeline of greater pressure.

Description

Technical Field

[0001] This invention relates to the field of pipeline noise reduction technology, and in particular to an electromagnetic underwater acoustic transducer. Background Technology

[0002] While submarine piping systems fulfill their functions of transmitting fluid media, hydrodynamics, and fluid information, they are always accompanied by vibration and noise. This vibration and noise affects the normal operation of the piping system and shortens the lifespan of piping components. Furthermore, after the noise from the submarine's main and auxiliary power plants and propulsion systems has been effectively controlled, piping system vibration and noise have become a major factor affecting the submarine's stealth tactical performance.

[0003] Traditional pipeline noise cancellation relies on sound wave propagation theory, employing methods such as absorption, isolation, damping, and structural noise reduction to passively attenuate noise along its propagation path. Passive noise reduction excels primarily in its strong attenuation capability for mid- and high-frequency noise, but it fails to provide ideal noise reduction for low-frequency noise. Active noise cancellation, on the other hand, achieves noise reduction by emitting inverse control noise that cancels out the noise to be attenuated. It exhibits a more prominent and stable effect in low-frequency noise control, making it highly suitable for eliminating low-frequency noise in pipelines.

[0004] Existing active noise cancellation achieves noise reduction by using electromagnetically driven radiating panels to move and generate anti-phase control noise that cancels out the noise to be attenuated. However, when the liquid pressure in the pipeline is high, the liquid pressure exerts a large amount of pressure on the radiating panels, affecting their movement and thus hindering noise cancellation.

[0005] Therefore, we propose an electromagnetic underwater acoustic transducer. Summary of the Invention

[0006] To address the shortcomings of the existing production technology, the applicant provides an electromagnetic underwater acoustic transducer. The water pressure balancer module balances the liquid pressure in the pipeline, thereby maintaining hydraulic balance between the drive panel and the radiating panel on both sides of the cylinder under the action of liquid pressure, which facilitates the electromagnetic drive of the radiating panel to move.

[0007] The technical solution adopted in this invention is as follows:

[0008] An electromagnetic underwater acoustic transducer, comprising:

[0009] The outer casing is located within the liquid filling pipeline;

[0010] The displacement amplifier module is housed inside the housing. The displacement amplifier module includes a drive panel, a hydraulic cylinder, and a radiation panel. The radiation panel is retractably positioned below the hydraulic cylinder, with one side of the radiation panel in contact with the liquid in the filling pipeline. The drive panel is retractably positioned above the hydraulic cylinder.

[0011] The hydraulic pressure balancer module is located above the drive panel. It transmits the hydraulic pressure outside the housing to the drive panel, so that the drive panel and the radial panel on both sides of the cylinder maintain hydraulic balance.

[0012] The electromagnetic actuator module, located inside the housing and outside the water pressure balancer module, is used to drive the movement of the drive panel and the radiating panel after maintaining hydraulic balance, so that the radiating panel emits sound waves with opposite amplitudes and the same phase to cancel out noise.

[0013] Its further features are:

[0014] The electromagnetic actuator module consists of an outer magnetic conductor, a coil frame, a permanent magnet, and an inner magnetic conductor, from the outside in. The coil frame is electrically connected to the drive panel via wires.

[0015] The permanent magnet adopts a five-segment design to reduce magnetic saturation in the magnetic conductor.

[0016] The water pressure balancer module includes a water cylinder, an air cylinder, a piston, a piston rod, and an air cylinder head. The air cylinder is movably fitted inside the water cylinder, and the air cylinder head is detachably mounted at the end of the air cylinder. The piston is movably mounted inside the air cylinder and is coaxial with the air cylinder. One end of the piston rod is detachably connected to the piston, and the other end of the piston rod is detachably connected to the drive panel.

[0017] The top of the water tank is integrally formed with a water pipe, which is used to transport the liquid in the filling pipeline into the water tank.

[0018] A sealable opening at the top of the cylinder is used for exhaust.

[0019] The piston is equipped with a one-way valve for supplying gas to the top of the piston to regulate the gas pressure, and the piston rod has an internal gas passage that connects the upper and lower parts.

[0020] The outer casing has a through hole at the position corresponding to the water pipe, and the outer casing also has a wire hole.

[0021] An end plate is fixed inside the outer shell. The end plate is fixedly connected to the outer magnetic conductor and the inner magnetic conductor. A mouth ring is fixed at the bottom of the end plate. The mouth ring is fixedly connected to the permanent magnet.

[0022] A fan is located inside the casing above the end plate for heat dissipation.

[0023] The beneficial effects of this invention are as follows:

[0024] This invention features a compact and reasonable structure and is easy to operate. Through the water pressure balancer module, liquid enters the water cylinder through the water pipe, which in turn squeezes the cylinder. The cylinder moves downward, causing the air pressure above the piston inside the cylinder to change. This causes the piston to move downward, driving the drive panel downward. The drive panel squeezes the hydraulic oil in the oil cylinder, which in turn squeezes the radiating panel downward. The radiating panel is also squeezed upward under the pressure of the external liquid, ensuring a dynamic balance between the drive panel and the radiating panel. This allows the radiating panel to move in the high-pressure filling pipeline, thus eliminating noise.

[0025] In addition, the present invention also has the following advantages:

[0026] (1) By setting a fan and setting vent holes on the end plate, the air is circulated when the fan is working, and the metal casing can quickly dissipate heat.

[0027] (2) By setting the permanent magnet into a five-segment configuration, the magnetic saturation in the magnetic conductor can be reduced, the magnetic induction intensity in the air gap is large, and a large working force can be generated in a limited volume. The working force has high linearity and is easy to control.

[0028] (3) By setting end caps and mouth rings, the external magnetic conductor, permanent magnet and internal magnetic conductor are fixed, making the overall structure more stable.

[0029] (4) By setting a sealable air hole at the top of the cylinder, the air pressure inside the cylinder can be adjusted after the cylinder position is adjusted during assembly, so that the air pressure inside the cylinder is normal and the normal movement of the cylinder can be guaranteed.

[0030] (5) By setting a one-way valve inside the piston to deliver gas to the top of the piston to regulate the gas pressure, and an internal air passage connected to the top and bottom of the piston rod is opened inside the piston rod. During installation, the cylinder is pressurized through the internal air passage of the piston rod, and the gas passes through the one-way valve to the top of the piston, which increases the pressure above the piston in the cylinder, causing the cylinder to move upward and move to the top. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 for Figure 1 A sectional view.

[0033] Figure 3 This is a cross-sectional view of the displacement amplifier module of the present invention.

[0034] Figure 4 This is a cross-sectional view of the water pressure balancer module of the present invention.

[0035] Figure 5 This is a cross-sectional view of the electromagnetic actuator module of the present invention.

[0036] Figure 6 This is a schematic diagram of the permanent magnet of the present invention.

[0037] The components are as follows: 1. Outer shell; 101. End plate; 102. Mouth ring; 103. Fan; 201. Drive panel; 202. Oil cylinder; 203. Radiation panel; 301. Water cylinder; 3011. Water pipe; 302. Air cylinder; 303. Piston; 3031. One-way air valve; 304. Piston rod; 3041. Inner air passage; 305. Cylinder head; 401. Outer magnetic conductor; 402. Coil frame; 403. Permanent magnet; 404. Inner magnetic conductor. Detailed Implementation

[0038] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0039] like Figure 1-6 As shown, an electromagnetic underwater acoustic transducer includes a housing 1, a displacement amplifier module, a water pressure balancer module, and an electromagnetic actuator module.

[0040] The outer casing 1 is located in the liquid filling pipeline. A wire hole is provided on the outer casing 1, through which the controller's connection wire passes. A fan 103 is provided inside the outer casing 1. The outer casing 1 is made of copper alloy. An end plate 101 is fixed below the outer casing 1 and the fan 103. A mouth ring 102 is fixed at the bottom of the end plate 101. A vent hole is provided on the end plate 101. The vent hole on the fan 103 and the end plate 101 work together to achieve air circulation, which, together with the outer casing 1, improves the heat dissipation effect.

[0041] The displacement amplifier module is housed inside the outer casing 1. The displacement amplifier module includes a drive panel 201, a hydraulic cylinder 202, and a radiation panel 203. The bottom of the hydraulic cylinder 202 is connected to the radiation panel 203 through a bellows. One side of the radiation panel 203 is in contact with the liquid in the filling pipeline. The top of the hydraulic cylinder 202 is connected to the drive panel 201 through a bellows. Hydraulic oil is contained inside the hydraulic cylinder 202.

[0042] The water pressure balancer module is located above the drive panel 201. The water pressure balancer module includes a water cylinder 301, a cylinder 302, a piston 303, a piston rod 304, and a cylinder head 305. The cylinder 302 is movably fitted inside the water cylinder 301. The cylinder head 305 is detachably mounted at the end of the cylinder 302. The piston 303 is movably mounted inside the cylinder 302 and is coaxial with the cylinder 302. One end of the piston rod 304 is threadedly connected to the piston 303, and the other end of the piston rod 304 is threadedly connected to the drive panel 201. A water pipe 3011 is integrally formed on the top of the water cylinder 301, and one end of the water pipe 3011 passes through the outer shell 1.

[0043] External liquid enters the water cylinder 301 through the water pipe 3011, which in turn compresses the air cylinder 302. The air cylinder 302 moves downward, causing the air pressure above the piston 303 inside the air cylinder 302 to change. This causes the piston 303 to move downward, driving the drive panel 201 to move downward. The drive panel 201 compresses the hydraulic oil in the oil cylinder 202, which in turn compresses the radiant panel 203 downward. The radiant panel 203 is also compressed upward under the pressure of the external liquid, thus ensuring a dynamic balance between the drive panel 201 and the radiant panel 203.

[0044] The electromagnetic actuator module is housed inside the outer casing 1 and outside the water pressure balancer module. From the outside in, the electromagnetic actuator module comprises an outer magnetic conductor 401, a coil frame 402, a permanent magnet 403, and an inner magnetic conductor 404. The coil frame 402 is electrically connected to the drive panel 201 via wires. The permanent magnet 403 employs a five-segment design to reduce magnetic saturation in the magnetic conductor, resulting in a high magnetic induction intensity within the air gap. This allows for the generation of significant actuation force within a limited volume, with high linearity and easy control of the actuation force.

[0045] The controller controls the current to the coil group wound on the coil frame 402 based on the signals from the primary and secondary sensors. The charged coil wound on the coil frame 402 generates a Lorentz force under the action of the air gap magnetic field generated by the inner magnetic conductor 404, the outer magnetic conductor 401, and the permanent magnet 403, which drives the coil 402 to move, and in turn drives the drive panel 201 to move. The drive panel 201 drives the radiation panel to move through the hydraulic cylinder 202, so that the radiation panel 203 emits sound waves with opposite amplitudes and the same phase to cancel out noise.

[0046] The cylinder 302 has a sealable opening at the top for exhaust. A one-way valve 3031 is installed inside the piston 303 to supply gas upwards and regulate the pressure. An internal air passage 3041, connecting the upper and lower parts, is located inside the piston rod 304. During installation, pressure is applied to the cylinder 302 through the internal air passage of the piston rod 304. The gas then passes through the one-way valve 3031 and enters the space above the piston 303, increasing the pressure above the piston 303 within the cylinder 302. This causes the cylinder 302 to move upwards, reaching its highest position.

[0047] The end plate 101 is fixedly connected to the outer magnetic conductor 401 and the inner magnetic conductor 404. A mouth ring 102 is fixedly attached to the bottom of the end plate 101, and the mouth ring 102 is fixedly connected to the permanent magnet 403.

[0048] In practical use, the assembled transducer is installed in the liquid filling pipeline. The liquid pushes the radiant panel 203 towards one side of the cylinder. The liquid enters the water cylinder 301 through the water pipe 3011, which in turn pushes the air cylinder 302. The air cylinder 302 moves downward, causing the air pressure above the piston 303 inside the air cylinder 302 to change. This causes the piston 303 to move downward, driving the drive panel 201 to move downward. The drive panel 201 pushes the hydraulic oil in the cylinder 202, which in turn pushes the radiant panel 203 downward. Under the pressure of the external liquid, the radiant panel 203 is also pushed downward. The upward compression ensures dynamic balance between the drive panel 201 and the radiation panel 203. The controller then controls the current in the coil on the coil frame 402. The charged coil wound on the coil frame 402 generates Lorentz force under the action of the air gap magnetic field generated by the inner magnetic conductor 404, the outer magnetic conductor 401, and the permanent magnet 403, driving the coil 402 to move, which in turn drives the drive panel 201 to move. The drive panel 201 drives the radiation panel to move through the hydraulic cylinder 202, causing the radiation panel 203 to emit sound waves with opposite amplitudes and the same phase to cancel out noise.

[0049] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. An electromagnetic underwater acoustic transducer, characterized in that, include: The outer casing (1) is disposed in the liquid filling pipeline; The displacement amplifier module is housed inside the housing (1). The displacement amplifier module includes a drive panel (201), a hydraulic cylinder (202), and a radiation panel (203). The radiation panel (203) is retractably located below the hydraulic cylinder (202). One side of the radiation panel (203) is in contact with the liquid in the filling pipeline. The drive panel (201) is retractably located above the hydraulic cylinder (202). The bottom of the hydraulic cylinder (202) is connected to the radiation panel (203) through a bellows, and the top of the hydraulic cylinder (202) is connected to the drive panel (201) through a bellows. Hydraulic oil is provided inside the hydraulic cylinder (202). The hydraulic pressure balancer module is located above the drive panel (201) and transmits the hydraulic pressure outside the housing (1) to the drive panel (201) so that the drive panel (201) and the radiation panel (203) on both sides of the cylinder (202) maintain hydraulic balance. The electromagnetic actuator module is located inside the housing (1) and outside the water pressure balancer module. It is used to drive the drive panel (201) and the radiation panel (203) after maintaining hydraulic balance to move, so that the radiation panel (203) emits sound waves with opposite amplitudes and the same phase to cancel out noise. The water pressure balancer module includes a water cylinder (301), a cylinder (302), a piston (303), a piston rod (304), and a cylinder head (305). The cylinder (302) is movably fitted inside the water cylinder (301). The cylinder head (305) is detachably mounted at the end of the cylinder (302). The piston (303) is movably mounted inside the cylinder (302) and coaxial with the cylinder (302). One end of the piston rod (304) is detachably connected to the piston (303), and the other end of the piston rod (304) is detachably connected to the drive panel (201).

2. The electromagnetic underwater acoustic transducer as described in claim 1, characterized in that: The electromagnetic actuator module includes, from the outside to the inside, an outer magnetic conductor (401), a coil frame (402), a permanent magnet (403), and an inner magnetic conductor (404). The coil frame (402) is electrically connected to the drive panel (201) via a wire.

3. The electromagnetic underwater acoustic transducer as described in claim 2, characterized in that: The permanent magnet (403) adopts a five-segment design to reduce magnetic saturation in the magnetic conductor.

4. The electromagnetic underwater acoustic transducer as described in claim 1, characterized in that: The top of the water tank (301) is integrally formed with a water pipe (3011) for transporting liquid from the filling pipeline into the water tank (301).

5. The electromagnetic underwater acoustic transducer as described in claim 1, characterized in that: The cylinder (302) has a sealable opening at the top for exhaust.

6. The electromagnetic underwater acoustic transducer as described in claim 5, characterized in that: The piston (303) is provided with a one-way air valve (3031) for supplying gas to the upper part of the piston (303) to regulate the air pressure, and the piston rod (304) is provided with an internal air passage (3041) that connects the upper and lower parts.

7. An electromagnetic underwater acoustic transducer as described in claim 4, characterized in that: The outer casing (1) has a through hole at the position corresponding to the water pipe (3011), and the outer casing (1) also has a wire hole.

8. An electromagnetic underwater acoustic transducer as described in claim 2, characterized in that: An end plate (101) is fixed inside the outer shell (1). The end plate (101) is fixedly connected to the outer magnetic conductor (401) and the inner magnetic conductor (404). A mouth ring (102) is fixed at the bottom of the end plate (101). The mouth ring (102) is fixedly connected to the permanent magnet (403).

9. An electromagnetic underwater acoustic transducer as described in claim 8, characterized in that: The outer casing (1) is equipped with a fan (103) above the end plate (101) for heat dissipation.

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