Combined type pressure-resistant backing of slotted ring transducer packaged by end cover and forming method of combined type pressure-resistant backing

Abstract

The invention provides an end cover packaged slotted ring transducer combined pressure-resistant backing and a forming method, the end cover packaged slotted ring transducer combined pressure-resistant backing comprises an upper end cover, an inner container inner wall, an inner container outer wall and a lower end cover, the inner container inner wall and the inner container outer wall are nested to form an annular inner container, and the slotted ring transducer is arranged on the outer side of the annular inner container in a sleeving manner; the upper end cover and the lower end cover are installed on the upper end face and the lower end face of the slotted ring transducer in a sealed mode respectively and are connected in a fastened mode through a connecting piece. The inner container outer wall and the inner container inner wall are nested inside and outside to form the annular inner container which is stuffed into the inner cavity of the overflow slotted ring transducer, under the condition that the size of the slotted ring transducer is not increased, the annular space of the slotted ring transducer is reasonably utilized, meanwhile, the space size of the backing air cavity is reduced, air pressure is increased through small size change, and the energy consumption is reduced. The pressure resistance is improved; and meanwhile, the structure does not completely fill the whole cavity space of the overflow slotted ring transducer, so that the structure has optimization and improvement capabilities and also provides a placement space for application of other equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater acoustic transducers, and in particular to a combined pressure-resistant backing of a slotted annular transducer packaged with an end cover and a molding method thereof. Background Art

[0002] Sound waves are the only information carrier and energy form that can be transmitted over long distances in the ocean. Ocean research, resource development and utilization, and even maritime military struggles are inseparable from the use of sound waves. As a tool for transmitting and receiving sound waves underwater, underwater acoustic transducers play an irreplaceable supporting role in the field of underwater acoustic technology. In the process of ocean exploration, specific performance requirements will be put forward for the transmitting transducers used according to the mission requirements. However, no transmitting transducer has been found to meet the requirements of all types of research. In addition, transmitting transducers have great differences in size, weight, and underwater acoustic characteristics. Therefore, scientific researchers need to analyze the specific situation and develop appropriate types of transmitting transducers.

[0003] The loss of sound waves propagating in water increases with the increase of frequency. Therefore, in the fields of long-distance detection and underwater acoustic countermeasures, low-frequency transmitting transducers have received special attention from relevant researchers. The fundamental frequency of the bending vibration transducer is inversely proportional to the square of the linear dimension and proportional to the thickness. It can produce low-frequency sound radiation, making it an extremely important type of low-frequency underwater acoustic transducer research. Among them, the slotted ring transducer is a relatively new type of bending vibration transducer. Its typical structure is made of a slotted metal ring and a driving source inside the ring. The structural stiffness is low. It is a type of design that realizes the miniaturization of low-frequency transducers. There are many ways to improve it. It can be applied to long-range active sonar systems, ultra-low frequency underwater acoustic experiments, seabed resource detection, marine fishing and other underwater acoustic fields.

[0004] The existing Chinese patent with publication number CN112954543A discloses a double-ended slit piezoelectric annular underwater acoustic emission transducer, comprising a piezoelectric annulus, wherein a plurality of longitudinal slits are arranged at the upper and lower ends of the piezoelectric annulus, and the plurality of longitudinal slits at the upper end are arranged opposite to the plurality of longitudinal slits at the lower end, the depth and width of all the longitudinal slits are the same, and the depth of the longitudinal slits is 20%-30% of the length of the piezoelectric annulus, and the width of the longitudinal slits at each end accounts for 5%-10% of the length of the circumference of the end portion, and under the excitation of a sinusoidal voltage, the piezoelectric annulus generates a double-ended bending vibration mode.

[0005] The slotted ring transducer reduces its equivalent structural stiffness through a special slotted structure, and can emit lower frequency sound waves. It has the advantages of low frequency and small size. However, it is difficult for the slotted ring transducer to meet the performance index requirements under overflow conditions. Therefore, without changing the main components of the transducer, it is often necessary to develop a specific backing and place it in the cavity on the inner side of the slotted ring transducer ring to emit a stable high-power low-frequency sound wave signal.

[0006] The pressure resistance of the slotted ring transducer with a backing structure is limited by the strength of the backing, so the pressure resistance is relatively weak. Therefore, in order to increase its working depth in water, common methods include filling it with high-pressure gas or using a pressurized gas cylinder. In the former, the gas can be filled in the backing structure in advance, but the gas pressure requirement cannot be too high, otherwise the backing may rupture; in the latter, as the water depth increases, real-time pressurization is carried out, but equipment such as gas cylinders greatly increases the use space of the transducer and the structure is relatively complex, making it difficult to guarantee its electroacoustic performance in water. Therefore, the study of the backing structure of the slotted ring transducer is very important.

[0007] In view of this, it is necessary to propose a structural design of a combined pressure-resistant backing of a slotted circular ring transducer based on end cover packaging, which can reasonably design and adjust the backing without changing the volume of the transducer. The internal air pressure of the backing can be increased through a small volume change. At the same time, relying on the strong tear resistance of the backing material, a certain supporting force can be generated, which can significantly improve the pressure resistance performance of the slotted circular ring transducer. It has a certain optimization space, meets actual needs, and has high reliability. Summary of the invention

[0008] In view of the defects in the prior art, the object of the present invention is to provide a combined pressure-resistant backing of a slotted annular transducer packaged with an end cover and a molding method.

[0009] According to the present invention, a combined pressure-resistant backing of a slit circular transducer packaged with an end cover and a molding method thereof include: an upper end cover, an inner wall of an inner liner, an outer wall of an inner liner, and a lower end cover. The inner wall of the inner liner and the outer wall of the inner liner are nested to form an annular inner liner. The slit circular transducer is sleeved on the outside of the annular inner liner. The upper end cover and the lower end cover are respectively sealed and installed on the upper and lower end faces of the slit circular transducer. The upper end cover and the lower end cover are fastened and connected by a connecting piece.

[0010] Preferably, the annular liner and the slotted circular ring transducer share a common central axis.

[0011] Preferably, the cross-section of the outer wall of the inner liner is I-shaped, and vertically extending sections are formed at both the upper and lower ends of the outer wall of the inner liner.

[0012] Preferably, both upper and lower ends of the inner wall of the liner are formed with outer edges, the outer edges are fitted with the inner side wall and two vertically extending sections of the outer wall of the liner, and an air cavity is formed between the inner wall of the liner and the outer wall of the liner.

[0013] Preferably, the slotted annular transducer is arranged in close contact with the outer wall of the inner tank and the two vertically extending sections.

[0014] Preferably, the vertically extending section of the outer wall of the inner liner is interference fit with the inner wall of the inner liner and the slotted circular transducer.

[0015] Preferably, the shape and size of the upper end cover and the lower end cover match the shape and size of the annular inner liner and the slit circular ring transducer, and the upper end cover and the lower end cover are respectively fitted with the upper and lower end surfaces of the annular inner liner, and the upper end cover and the lower end cover are respectively fitted with the upper and lower end surfaces of the slit circular ring transducer.

[0016] Preferably, the upper and lower end surfaces of the inner wall of the liner, the slotted annular transducer and the outer wall of the liner cooperate to form a step shape, and the lower surface of the upper end cover and the upper surface of the lower end cover are respectively formed with corresponding step-shaped grooves.

[0017] Preferably, a plurality of the connecting members are evenly arranged along the circumferential direction on the outer side of the slotted circular ring transducer, and the connecting members include connecting screws and nuts. A plurality of connecting holes are correspondingly opened on the upper end cover and the lower end cover, and the two ends of the connecting screw pass through the upper end cover and the lower end cover respectively and are fastened to the nut.

[0018] A molding method of a combined pressure-resistant backing of a slotted annular transducer with an end cap package provided by the present invention is applied to the above-mentioned combined pressure-resistant backing of a slotted annular transducer with an end cap package, comprising the following steps:

[0019] Step S1, clean the slotted annular transducer, the end cap, the connecting screw, the nut, the inner wall of the liner and the outer wall of the liner, and isolate them from air and dry them;

[0020] Step S2, the inner wall of the inner liner is embedded into the inner side of the outer wall of the inner liner, and the two are nested and assembled to form an annular inner liner;

[0021] Step S3, placing the annular liner into the inner cavity of the slotted annular transducer;

[0022] Step S4, attaching the upper end cover and the lower end cover horizontally to the upper and lower end surfaces of the slotted circular ring transducer into which the annular liner has been inserted;

[0023] Step S5, the upper end cover and the lower end cover are connected by connecting screws, and are fastened and clamped by nuts, so that the upper end cover and the lower end cover tightly clamp the slit annular transducer in the middle.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention forms an annular inner liner by nesting the outer wall of the inner liner and the inner wall of the inner liner inside and outside, and then inserts the inner liner into the inner cavity of the overflow slit circular ring transducer. Without increasing the volume of the slit circular ring transducer, the space inside the ring of the slit circular ring transducer is reasonably utilized, and at the same time, the size of the backing air cavity space is reduced, and the air pressure is increased with a small volume change, thereby improving the pressure resistance performance. At the same time, the structure does not completely fill the entire cavity space of the overflow slit circular ring transducer, has the ability to be optimized and improved, and can perform corresponding size adjustments. In addition, it also provides placement space for the application of other equipment.

[0026] 2. The present invention is assembled by the end cover, the transducer and the inner tank, which has a fixing function and can realize the connection and coordination between the slotted ring transducer and other equipment. By optimizing the material of the pressure-resistant backing, the comprehensive performance of the slotted ring transducer can be optimized. The processing and improvement are easy, the design and application are simple, and it is suitable for the application of overflow ring transducers and slotted ring transducers of various diameters, and has a wide range of expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0028] Figure 1 The present invention mainly embodies the structural schematic diagram of the combined pressure-resistant backing of the slotted annular transducer packaged with the end cover after being assembled and formed;

[0029] Figure 2 The present invention mainly embodies a cross-sectional view of a combined pressure-resistant backing of a slotted annular transducer packaged with an end cover;

[0030] Figure 3 The exploded view of the combined pressure-resistant backing of the slotted annular transducer packaged with the end cover of the present invention is mainly embodied;

[0031] Figure 4 This is a schematic diagram of the structure of the upper end cover mainly embodied in the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the inner wall of the inner container mainly embodied in the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the outer wall of the inner container mainly embodied in the present invention;

[0034] Figure 7 It is a schematic diagram of the combination of the inner wall of the inner liner and the outer wall of the inner liner mainly embodied in the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the lower end cover mainly embodied in the present invention;

[0036] Fig. 9 This is a schematic diagram of the structure of a slotted annular transducer mainly embodied in the present invention;

[0037] Fig.10 The present invention mainly embodies a schematic diagram of an inner shell inserted into the inner cavity of a slotted circular ring transducer.

[0038] Cross-section of a slotted ring transducer;

[0039] As shown in the figure:

[0040] Upper end cover 1 Inner wall of liner 2 Inner wall of liner 3

[0041] Lower end cover 4 Connector 5 Slit ring transducer 6 DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0043] Example 1

[0044] like Figure 1-10 As shown, a slit circular transducer combined pressure-resistant backing with an end cover package provided according to the present invention includes: an upper end cover 1, an inner wall of an inner liner 2, an outer wall of an inner liner 3, and a lower end cover 4. The inner wall 2 of the inner liner and the outer wall 3 of the inner liner are nested to form an annular inner liner. The slit circular transducer 6 is sleeved on the outside of the annular inner liner. The upper end cover 1 and the lower end cover 4 are respectively sealed and installed on the upper and lower end surfaces of the slit circular transducer 6. The upper end cover 1 and the lower end cover 4 are fastened together by a connector 5.

[0045] The pressure-resistant backing is formed into an annular inner liner by nesting the inner liner outer wall 3 and the inner liner inner wall 2 inside and outside, and then the inner liner is inserted into the inner cavity of the slit circular ring transducer 6, and finally the external connector 5 and the upper end cover 1 and the lower end cover 4 are used to clamp and package the liner. Without changing the volume of the slit circular ring transducer 6, the present application makes reasonable use of its internal cavity space and designs and applies the pressure-resistant backing. At the same time, the structure does not completely fill the entire cavity space of the slit circular ring transducer 6, and has the ability to optimize and improve, and can be adjusted in size accordingly. In addition, it also provides placement space for the application of other equipment. The combined pressure-resistant backing can control the thickness and diameter of the inner liner outer wall 3 and the inner liner inner wall 2, preferably select various component materials, make reasonable use of the space inside the ring, and increase the application range of the slit circular ring transducer.

[0046] The annular inner shell and the slotted annular transducer 6 share a central axis.

[0047] There is no specific requirement for the thickness of the liner outer wall 3 and the liner inner wall 2, which can be adjusted accordingly according to actual conditions. The cross-section of the liner outer wall 3 is I-shaped, and vertical extension sections are formed at the upper and lower ends of the liner outer wall 3. The upper and lower ends of the liner inner wall 2 are formed with outer edges, and the outer edges are fitted with the inner side wall of the liner outer wall 3 and the two vertical extension sections, and an air cavity is formed between the liner inner wall 2 and the liner outer wall 3. The slit annular transducer 6 is fitted with the outer side wall of the liner outer wall 3 and the two vertical extension sections. That is, the liner inner wall 2 is embedded in the inner cavity of the liner outer wall 3, and the slit annular transducer 6 is embedded in the outer cavity of the liner outer wall 3, that is, the slit annular transducer 6 and the liner inner wall 2 are respectively wrapped inside and outside through the vertical extension sections at the upper and lower ends of the liner outer wall 3. The vertically extending section of the outer wall 3 of the inner liner is interference-fitted with the inner wall 2 of the inner liner and the slotted circular ring transducer 6, and the interference amount can be adjusted according to actual conditions.

[0048] The shape and size of the upper end cover 1 and the lower end cover 4 match the shape and size of the annular inner liner and the slit circular ring transducer 6. The upper end cover 1 and the lower end cover 4 are respectively fitted with the upper and lower end surfaces of the annular inner liner, and the upper end cover 1 and the lower end cover 4 are respectively fitted with the upper and lower end surfaces of the slit circular ring transducer 6. The upper and lower end surfaces of the inner wall 2 of the inner liner, the slit circular ring transducer 6 and the outer wall 3 of the inner liner cooperate to form a step shape, and the lower surface of the upper end cover 1 and the upper surface of the lower end cover 4 are respectively formed with corresponding step-shaped grooves. The contact surface between the upper end cover 1, the lower end cover 4 and the slit circular ring transducer 6 needs to match the upper and lower end surface structure of the slit circular ring transducer 6 inserted into the inner liner and match the size to ensure the water tightness of the transducer. The stepped design of the end cover center and the inner liner can increase the sealing performance. The stepped design on the inner side plus the connector 5 on the outer side are sufficient to achieve sealing. The stepped structure can be reasonably designed according to actual conditions.

[0049] The outer side of the slit annular transducer 6 is evenly provided with a plurality of connecting parts 5 along the circumferential direction. The connecting parts 5 include connecting screws and nuts. The upper end cover 1 and the lower end cover 4 are correspondingly provided with a plurality of connecting holes. The two ends of the connecting screw pass through the upper end cover 1 and the lower end cover 4 and are fastened to the nut, that is, the end cover, the transducer and the inner tank are encapsulated and formed by applying a clamping force through the connecting screw and the nut.

[0050] The inner wall 2 of the inner tank is made of rigid hard material to ensure the structural strength of the inner tank. The end cap and the connecting screw are made of the same rigid hard material as the inner wall 2 of the inner tank. The connecting screw and the nut need to be tightly tightened to achieve watertight packaging through the clamping force, the matching of the end cap and the end face structure of the transducer.

[0051] In the present application, without increasing the volume of the slotted ring transducer, the combined pressure-resistant backing design based on the end cap makes reasonable use of the space inside the ring of the slotted ring transducer. At the same time, the size of the air cavity space of the backing is reduced, and the air pressure is increased with a small volume change, thereby improving the pressure resistance performance. The present application can adjust the size of each component of the slotted ring transducer backing according to demand to achieve different effects, and has a certain adjustment ability. The present application can optimize the comprehensive performance of the slotted ring transducer by optimizing the material of the pressure-resistant backing. In the present application, the end cap, transducer and inner liner are assembled and formed, which has a fixing function and can realize the connection and coordination of the slotted ring transducer with other equipment. In the present application, metal hardware can be selected for the end cap and the inner liner, which is easy to process and improve, and simple to design and apply. The present application is suitable for the application of overflow ring transducers and slotted ring transducers of various diameters, and has a wide range of expansion.

[0052] Example 2

[0053] A molding method of a combined pressure-resistant backing of a slotted annular transducer with an end cap package provided by the present invention is applied to the combined pressure-resistant backing of a slotted annular transducer with an end cap package of Example 1, comprising the following steps:

[0054] Step S1, clean the slotted annular transducer 6, the end cap, the connecting screw, the nut, the inner wall 2 of the inner liner and the outer wall 3 of the inner liner to remove moisture, impurities and oil stains, isolate them from air and dry them to prevent impurities from affecting the insulation and vibration mode;

[0055] Step S2, the inner wall 2 of the inner liner is embedded in the inner side of the outer wall 3 of the inner liner, and the two are nested and assembled to form an annular inner liner. During the assembly process, lubricant can be applied to the upper and lower ends of the inner wall 2 of the inner liner;

[0056] Step S3, placing the annular inner liner into the inner cavity of the slit circular ring transducer 6, ensuring that the center of the inner liner is aligned with the center of the slit circular ring transducer 6, and ensuring that the outer wall 3 of the inner liner is tightly fitted with the inner wall of the slit circular ring transducer 6, the structures of the two need to match, and lubricant can be applied to the outer wall 3 of the inner liner to assist installation during the assembly process;

[0057] Step S4, horizontally attach the upper end cover 1 and the lower end cover 4 to the upper and lower end surfaces of the slit annular transducer 6 that has been inserted into the annular liner, and ensure that the contact end surface structures of the two are consistent, and some gaps or pores can be filled with glue to complete the attachment;

[0058] Step S5, the upper end cover 1 and the lower end cover 4 are connected by connecting screws and are tightened and clamped with nuts so that the upper end cover 1 and the lower end cover 4 tightly clamp the slit circular transducer 6 in the middle. During the installation process, it is necessary to ensure that the upper end cover 1 and the lower end cover 4 are clamped in parallel, and gaskets can be used between the nuts and the end covers to assist in the installation.

[0059] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A combined pressure-resistant backing for a slotted annular transducer packaged with an end cap, characterized in that: include: An upper end cover (1), an inner wall of an inner liner (2), an outer wall of an inner liner (3), and a lower end cover (4); the inner wall of the inner liner (2) and the outer wall of the inner liner (3) are nested to form an annular inner liner; a slit annular transducer (6) is sleeved on the outer side of the annular inner liner; the upper end cover (1) and the lower end cover (4) are respectively sealed and mounted on the upper and lower end surfaces of the slit annular transducer (6); and the upper end cover (1) and the lower end cover (4) are fastened and connected via a connector (5).

2. The end cap packaged slotted annular transducer combined pressure-resistant backing as claimed in claim 1, characterized in that: The annular inner shell and the slotted circular ring transducer (6) share a common central axis.

3. The end cap packaged slotted annular transducer combined pressure-resistant backing as claimed in claim 1, characterized in that: The cross section of the inner container outer wall (3) is I-shaped, and vertically extending sections are formed at both the upper and lower ends of the inner container outer wall (3).

4. The end cap packaged slotted annular transducer combined pressure-resistant backing as claimed in claim 3, characterized in that: The upper and lower ends of the inner wall (2) of the inner liner are both formed with outer edges, and the outer edges are fitted with the inner side wall and two vertically extending sections of the outer wall (3) of the inner liner, and an air cavity is formed between the inner wall (2) of the inner liner and the outer wall (3) of the inner liner.

5. The end cap packaged slotted annular transducer combined pressure-resistant backing as claimed in claim 4, characterized in that: The slotted circular transducer (6) is arranged in close contact with the outer wall of the inner tank outer wall (3) and the two vertically extending sections.

6. The end cap packaged slotted annular transducer combined pressure-resistant backing as claimed in claim 5, characterized in that: The vertically extending section of the outer wall (3) of the inner liner is interference-fitted with the inner wall (2) of the inner liner and the slotted annular transducer (6).

7. The end cap packaged slotted annular transducer combined pressure-resistant backing as claimed in claim 1, characterized in that: The shape and size of the upper end cover (1) and the lower end cover (4) match the shape and size of the annular inner liner and the slit circular ring transducer (6); the upper end cover (1) and the lower end cover (4) are respectively fitted with the upper and lower end surfaces of the annular inner liner; and the upper end cover (1) and the lower end cover (4) are respectively fitted with the upper and lower end surfaces of the slit circular ring transducer (6).

8. The end cap-encapsulated slotted annular transducer combined pressure-resistant backing as claimed in claim 7, characterized in that: The upper and lower end surfaces of the inner wall (2) of the liner, the slotted annular transducer (6) and the outer wall (3) of the liner cooperate to form a step shape, and the lower surface of the upper end cover (1) and the upper surface of the lower end cover (4) are respectively formed with corresponding step-shaped grooves.

9. The end cap packaged slotted annular transducer combined pressure-resistant backing as claimed in claim 1, characterized in that: A plurality of the connecting members (5) are evenly arranged along the circumferential direction on the outer side of the slotted annular transducer (6), and the connecting members (5) include connecting screws and nuts. A plurality of connecting holes are correspondingly provided on the upper end cover (1) and the lower end cover (4), and the two ends of the connecting screws respectively pass through the upper end cover (1) and the lower end cover (4) and are fastened to the nuts.

10. A method for forming a combined pressure-resistant backing of a slotted annular transducer packaged with an end cap, characterized in that: The slotted annular transducer combined pressure-resistant backing used for the end cap package according to any one of claims 1 to 9 comprises the following steps: Step S1, clean the slotted annular transducer (6), the end cover, the connecting screw, the nut, the inner wall of the inner liner (2) and the outer wall of the inner liner (3), and isolate them from air and dry them; Step S2, the inner wall of the inner liner (2) is embedded into the inner side of the outer wall of the inner liner (3), and the two are nested and assembled to form an annular inner liner; Step S3, placing the annular inner shell into the inner cavity of the slotted annular transducer (6); Step S4, attaching the upper end cover (1) and the lower end cover (4) horizontally to the upper and lower end surfaces of the slotted circular transducer (6) into which the annular liner has been inserted; Step S5, the upper end cover (1) and the lower end cover (4) are connected by connecting screws and are fastened and clamped by nuts, so that the upper end cover (1) and the lower end cover (4) tightly clamp the slit annular transducer (6) in the middle.

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