Fracture-proof vulcanized structure for thin-walled spherical hydrophone

Abstract

The application provides a thin-wall spherical hydrophone anti-breaking vulcanization structure, which comprises a piezoelectric ceramic ball, a hard foam gasket, a universal follow-up spherical nylon adapter shaft, a stainless steel main shaft, vulcanized rubber and a half vulcanization mold, wherein the piezoelectric ceramic ball, the hard foam gasket, the universal follow-up spherical nylon adapter shaft and the stainless steel main shaft are sequentially arranged from inside to outside of the half vulcanization mold; the spherical contact surface in the middle of the universal follow-up spherical nylon adapter shaft is connected with the stainless steel main shaft, and the two are rotationally matched through the spherical contact surface. The half-spherical contact surface between the stainless steel main shaft and the universal follow-up spherical nylon adapter shaft is connected, so that when the piezoelectric ceramic ball opening is subjected to torsional stress, the rotation matching of the half-spherical contact surface can avoid the problem of torsional stress concentration, thereby reducing the occurrence of the spherical breaking problem of the thin-wall spherical hydrophone in the vulcanization process, and further improving the product yield.

Description

Technical Field

[0001] This invention relates to the field of underwater acoustic engineering structural design, specifically to a sulfidation structure for preventing the breakage of a thin-walled spherical hydrophone. Background Technology

[0002] To meet the needs of naval safety and scientific research, countries around the world are developing deep-sea submersibles to study and explore deep-sea resources. These ships typically carry various detection instruments. The performance of hydrophones, responsible for underwater acoustic countermeasures and positioning communications, is crucial. As the receiving end of the ship, if the receiving hydrophone malfunctions, the ship will receive unreliable signals, inevitably leading to significant deviations. Therefore, the manufacture of stable hydrophones is particularly important. Thin-walled spherical hydrophones, due to their advantages of low sensitivity fluctuations in the frequency domain, strong environmental stability, and omnidirectionality, have become indispensable detection instruments on ships. In addition, these hydrophones can also serve as standard hydrophones to calibrate other hydrophones.

[0003] A Chinese patent with publication number CN109239696A discloses a high hydrostatic pressure resistant spherical hydrophone, which mainly includes a perforated spherical piezoelectric element, a base connected to an equipment installation platform, a screw connected to the upper end of the base, and the screw connected to the perforated spherical piezoelectric element through a non-metallic support structure to decouple the perforated spherical piezoelectric element from the base. The inner cavity of the perforated spherical piezoelectric element is filled with a flexible solid to balance the internal and external pressure difference. The perforated spherical piezoelectric element has a small hole through which a wire passes. The perforated spherical piezoelectric element, the non-metallic support structure, the screw, and the base are sealed with a vulcanized rubber layer.

[0004] In the traditional vulcanization structure design of spherical hydrophones, based on decoupling requirements, a rigid connection structure design is generally adopted, which uses foam gaskets and cylindrical nylon adapter shafts to connect the stainless steel main shaft. Since the ceramic ball and adapter shaft need to withstand the extrusion of vulcanized rubber under high temperature and high pressure during the vulcanization process, stress concentration is prone to occur at the opening of the ball under rigid connection conditions, which can cause the ball to break and lead to vulcanization failure.

[0005] Therefore, the inventors believe that there is a need to provide a flexible connection vulcanization structure for thin-walled spherical hydrophones that can eliminate the torsional stress acting at the opening of the sphere, solve the problem of sphere breakage caused by torsional stress concentration at the opening during the vulcanization process of thin-walled spherical hydrophones, and thus improve the product yield. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a rupture-resistant vulcanized structure for thin-walled spherical hydrophones.

[0007] According to the present invention, a shatterproof vulcanization structure for a thin-walled spherical hydrophone includes: a piezoelectric ceramic ball, a rigid foam pad, a universal rotating spherical nylon adapter shaft, a stainless steel main shaft, vulcanized rubber, and a half-type vulcanization mold. The piezoelectric ceramic ball, the rigid foam pad, the universal rotating spherical nylon adapter shaft, and the stainless steel main shaft are arranged sequentially from the inside to the outside of the half-type vulcanization mold. The stainless steel main shaft is connected to the spherical contact surface in the middle of the universal rotating spherical nylon adapter shaft, and the two are rotatably engaged through the spherical contact surface. The vulcanized rubber covers one end of the piezoelectric ceramic ball, the universal rotating spherical nylon adapter shaft, and the stainless steel main shaft near the universal rotating spherical nylon adapter shaft.

[0008] Preferably, the half-type vulcanizing mold has an internal accommodating space, and the piezoelectric ceramic ball, the rigid foam gasket, the universal rotating spherical nylon adapter shaft, and the stainless steel main shaft are arranged with the accommodating space along the same central axis.

[0009] Preferably, the half-type vulcanizing mold includes a detachably connected upper mold and a lower mold, and the central axis of the accommodating space is located on the mating surface of the upper mold and the lower mold.

[0010] Preferably, one end of the stainless steel spindle away from the universal spherical nylon adapter shaft extends to the outside of the half-type vulcanizing mold, and the middle part of the stainless steel spindle is engaged with the upper mold and the lower mold.

[0011] Preferably, the piezoelectric ceramic ball has an opening, one end of the rigid foam pad is inserted into the piezoelectric ceramic ball through the opening, and the other end of the rigid foam pad is connected to the spherical contact surface of the universal rotating spherical nylon adapter shaft.

[0012] Preferably, the stainless steel spindle is sleeved on the outside of the universal spherical nylon adapter shaft, and the end of the stainless steel spindle is located at the radial surface of the universal spherical nylon adapter shaft.

[0013] Preferably, the stainless steel spindle has a continuous series of uneven steps on one side near the universal spherical nylon adapter shaft, the outer side of the uneven steps is coated with Kemlock adhesive, and the vulcanized rubber covers the outer side of the uneven steps of the stainless steel spindle.

[0014] Preferably, the piezoelectric ceramic ball has a wire inside, which extends outward from the inside of the piezoelectric ceramic ball through the rigid foam pad, and the wire is welded to the universal rotating spherical nylon adapter shaft.

[0015] Preferably, the outer side of the piezoelectric ceramic ball is coated with Kemlock adhesive.

[0016] Preferably, the vulcanized rubber comprises 150g of raw vulcanized rubber material, which is vulcanized through a vulcanization process.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This invention connects the stainless steel spindle with the hemispherical contact surface between the universal rotating spherical nylon adapter shaft. When the opening of the piezoelectric ceramic ball is subjected to torsional stress, the rotational fit of the hemispherical contact surface can prevent the problem of torsional stress concentration, thereby reducing the occurrence of ball breakage during the vulcanization process of the thin-walled spherical hydrophone and improving the product yield.

[0019] 2. This invention uses a piezoelectric ceramic ball, a rigid foam pad, a universal rotating spherical nylon adapter shaft, a stainless steel main shaft, and a half-type vulcanizing mold with the accommodating space set on the central axis. The stainless steel main shaft is fixed on the half-type vulcanizing mold, thereby ensuring that the vulcanized rubber raw material can be uniformly coated, thus improving the product yield. Attached Figure Description

[0020] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a cross-sectional view of the sulfidation structure that mainly embodies the anti-breakage properties of the thin-walled spherical hydrophone of this invention;

[0022] Figure 2 This is a schematic diagram illustrating the sulfidation structure of the thin-walled spherical hydrophone to prevent breakage, which is the main feature of this invention.

[0023] Figure 3 This is a schematic diagram illustrating the installation process of the thin-walled spherical hydrophone semi-finished product, which is the main feature of this invention.

[0024] Figure 4 This is a schematic diagram illustrating the finished product of the thin-walled spherical hydrophone, which is the main feature of this invention.

[0025] As shown in the figure:

[0026] 1 piezoelectric ceramic ball, 2 rigid foam pad

[0027] 3 Universal spherical nylon adapter shaft 4 Stainless steel spindle

[0028] 5. Vulcanized rubber; 6. Half-type vulcanizing mold Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0030] like Figure 1 and 2 As shown, a shatterproof vulcanization structure for a thin-walled spherical hydrophone according to the present invention includes: a piezoelectric ceramic ball 1, a rigid foam pad 2, a universal rotating spherical nylon adapter shaft 3, a stainless steel main shaft 4, vulcanized rubber 5, and a half-type vulcanization mold 6, the half-type vulcanization mold 6 having an internal receiving space; the piezoelectric ceramic ball 1, the rigid foam pad 2, the universal rotating spherical nylon adapter shaft 3, and the stainless steel main shaft 4 are arranged sequentially from the inside of the half-type vulcanization mold 6 outwards, and all four are arranged with the receiving space on the same central axis; the stainless steel main shaft 4 is connected to the spherical contact surface in the middle of the universal rotating spherical nylon adapter shaft 3, and the two are rotatably engaged through the spherical contact surface; the vulcanized rubber 5 covers one end of the piezoelectric ceramic ball 1, the universal rotating spherical nylon adapter shaft 3, and the stainless steel main shaft 4 near the universal rotating spherical nylon adapter shaft 3.

[0031] This application provides a flexible connection vulcanization structure design for a thin-walled spherical hydrophone. When the half-type vulcanization mold 6 is closed, the stainless steel main shaft 4 and the universal rotating spherical nylon adapter shaft 3 can rotate freely through the spherical contact surface, eliminating the torsional stress acting on the piezoelectric ceramic ball 1. This solves the problem of ball breakage caused by torsional stress concentration at the opening during the vulcanization process of thin-walled spherical hydrophones, thereby improving the product yield.

[0032] The half-type vulcanizing mold 6 includes a detachably connected upper mold and a lower mold, with the central axis of the accommodating space located on the mating surfaces of the upper and lower molds. A stainless steel spindle 4 extends from one end away from the universal spherical nylon adapter shaft 3 to the outside of the half-type vulcanizing mold 6. The middle part of the stainless steel spindle 4 engages with the upper and lower molds, and the middle part of the stainless steel spindle 4 is securely mounted on the half-type vulcanizing mold 6, thereby ensuring the stability of the overall structure when the mold is closed.

[0033] like Figure 3As shown, the piezoelectric ceramic ball 1 has an opening. One end of the rigid foam pad 2 is inserted into the piezoelectric ceramic ball 1 through the opening, and the other end of the rigid foam pad 2 is connected to the universal rotating spherical nylon adapter shaft 3. The stainless steel spindle 4 is sleeved on the outside of the universal rotating spherical nylon adapter shaft 3, and the end of the stainless steel spindle 4 is located at the radial surface of the universal rotating spherical nylon adapter shaft 3, thereby ensuring that the stainless steel spindle 4 and the universal rotating spherical nylon adapter shaft 3 rotate in a spherical contact surface, effectively releasing the torsional stress acting on the opening of the piezoelectric ceramic ball 1.

[0034] The stainless steel spindle 4 has continuous uneven steps on its circumference near the universal spherical nylon adapter shaft 3, and the outer side of the uneven steps is coated with Kemlock rubber. Vulcanized rubber 5 covers the outer side of the uneven steps of the stainless steel spindle 4.

[0035] The piezoelectric ceramic ball 1 has a wire inside, which extends outward from the inside of the piezoelectric ceramic ball 1 through a rigid foam pad 2, and is welded to a universal spherical nylon adapter shaft 3. The outer side of the piezoelectric ceramic ball 1 is coated with Kemlock adhesive.

[0036] like Figure 4 As shown, in one specific embodiment, this application includes: a Φ24mm piezoelectric ceramic ball 1, a rigid foam pad 2, a universal rotating spherical nylon adapter shaft 3, a stainless steel spindle 4, 150g of vulcanized rubber 5 raw rubber material, and a set of half-type vulcanization molds 6. The opening of the piezoelectric ceramic ball 1 is connected to the rigid foam pad 2; the rigid foam pad 2 is connected to the universal rotating spherical nylon adapter shaft 3; and the stainless steel spindle 4 is connected to the universal rotating spherical nylon adapter shaft 3 through a hemispherical contact surface.

[0037] First, after cleaning the piezoelectric ceramic ball 1, insert a rigid foam pad 2 and pass the internal wires through the ball. Then, insert a universal rotating spherical nylon adapter shaft 3 and weld the wires. Connect the sandblasted stainless steel spindle 4 to the universal rotating spherical nylon adapter shaft 3 through a hemispherical contact surface. Apply Kemlock adhesive to the outer side of the continuous uneven steps of the piezoelectric ceramic ball 1 and the stainless steel spindle 4 and cure for 30 minutes. Finally, cover the outer side of the continuous uneven steps of the piezoelectric ceramic ball 1, the universal rotating spherical nylon adapter shaft 3, and the stainless steel spindle 4 with 150g of vulcanized raw rubber material 5.

[0038] Then, the stainless steel spindle 4, together with the vulcanized raw rubber material 5, is loaded into the preheated half-type vulcanizing mold 6 and the stainless steel spindle 4 is fixed. Vulcanization is carried out using a general vulcanization process. When the half-type vulcanizing mold 6 is closed, the stainless steel spindle 4 and the universal rotating spherical nylon adapter shaft 3 rotate freely through the spherical contact surface, releasing the torsional stress acting on the opening of the sphere and avoiding spherical breakage.

[0039] Finally, after vulcanization is complete, the half-type vulcanization mold 6 is allowed to cool naturally before demolding. The vulcanized hydrophone is then removed, the flash is removed, and it is connected to the vulcanized cable head for testing.

[0040] This application solves the problem of torsional stress concentration at the opening of a thin-walled spherical hydrophone, which is usually caused by rigid connection, by using a structural design that connects the stainless steel spindle 4 and the universal spherical nylon adapter shaft 3 with a hemispherical contact surface. By eliminating the torsional stress acting at the opening of the sphere, the problem of sphere breakage caused by torsional stress concentration at the opening, which often occurs during the vulcanization process of thin-walled spherical hydrophones, is solved, thereby improving the product yield.

[0041] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A rupture-resistant vulcanized structure for a thin-walled spherical hydrophone, characterized in that, include: The piezoelectric ceramic ball (1), rigid foam pad (2), universal rotating spherical nylon adapter shaft (3), stainless steel spindle (4), vulcanized rubber (5), and half-type vulcanizing mold (6) are arranged sequentially from the inside to the outside of the half-type vulcanizing mold (6). The stainless steel spindle (4) is connected to the spherical contact surface in the middle of the universal spherical nylon adapter shaft (3), and the two are rotated together through the spherical contact surface; The vulcanized rubber (5) covers the piezoelectric ceramic ball (1), the universal rotating spherical nylon adapter shaft (3), and the stainless steel spindle (4) near one end of the universal rotating spherical nylon adapter shaft (3).

2. The sulfide structure for preventing breakage of the thin-walled spherical hydrophone as described in claim 1, characterized in that, The half-type vulcanizing mold (6) has an internal accommodating space. The piezoelectric ceramic ball (1), the rigid foam pad (2), the universal rotating spherical nylon adapter shaft (3), and the stainless steel main shaft (4) are arranged on the same central axis as the accommodating space.

3. The rupture-resistant vulcanized structure for the thin-walled spherical hydrophone as described in claim 2, characterized in that, The half-type vulcanizing mold (6) includes a detachably connected upper mold and a lower mold, and the central axis of the accommodating space is located on the mating surface of the upper mold and the lower mold.

4. The rupture-resistant vulcanized structure for the thin-walled spherical hydrophone as described in claim 3, characterized in that, The stainless steel spindle (4) extends from one end away from the universal spherical nylon adapter shaft (3) to the outside of the half-type vulcanizing mold (6), and the middle part of the stainless steel spindle (4) is engaged with the upper mold and the lower mold.

5. The rupture-resistant vulcanized structure for a thin-walled spherical hydrophone as described in claim 1, characterized in that, The piezoelectric ceramic ball (1) has an opening, and one end of the rigid foam pad (2) is inserted into the piezoelectric ceramic ball (1) through the opening. The other end of the rigid foam pad (2) is connected to the spherical contact surface of the universal rotating spherical nylon adapter shaft (3).

6. The sulfide structure for preventing breakage of the thin-walled spherical hydrophone as described in claim 1, characterized in that, The stainless steel spindle (4) is sleeved on the outside of the universal spherical nylon adapter shaft (3), and the end of the stainless steel spindle (4) is located at the radial surface of the universal spherical nylon adapter shaft (3).

7. The rupture-resistant vulcanized structure for a thin-walled spherical hydrophone as described in claim 1, characterized in that, The stainless steel spindle (4) has a continuous set of uneven steps on one side near the universal spherical nylon adapter shaft (3). The outer side of the uneven steps is coated with Kemlock adhesive, and the vulcanized rubber (5) covers the outer side of the uneven steps of the stainless steel spindle (4).

8. The rupture-resistant vulcanized structure for a thin-walled spherical hydrophone as described in claim 1, characterized in that, The piezoelectric ceramic ball (1) has a wire inside. The wire extends outward from the inside of the piezoelectric ceramic ball (1) through the rigid foam pad (2). The wire is welded to the universal rotating spherical nylon adapter shaft (3).

9. The rupture-resistant vulcanized structure for a thin-walled spherical hydrophone as described in claim 1, characterized in that, The outer side of the piezoelectric ceramic ball (1) is coated with Kemlock adhesive.

10. The rupture-resistant vulcanized structure for a thin-walled spherical hydrophone as described in claim 1, characterized in that, The vulcanized rubber (5) includes 150g of vulcanized rubber raw material, which is vulcanized through a vulcanization process.

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