A ship bow sonar platform for reducing vibration energy transmission

Abstract

The present invention proposes a ship bow sonar platform that reduces vibration energy transfer, which is intended to reduce the influence of vibration energy transfer on the self-noise of the ship bow sonar platform, and belongs to the technical field of ship vibration reduction and noise reduction. The sonar platform includes a hydraulic spring damping device, a transmission rod buffer device, a positioning block fixing device and a hydrophone array, etc. The transmission rod buffer device includes a platform, a transmission rod and a supporting spring, etc. The transmission rod includes two mutually hinged rod bodies, the upper end of the platform is connected to the upper deck through a hydraulic spring damping device, the positioning block fixing device includes an upper positioning block and a lower positioning block that are matched and connected, and the lower positioning block is connected to the lower deck. The hydrophone array includes multiple hydrophones, an elastic rope and two rigid rods, the two ends of the elastic rope are respectively connected to the two rigid rods, and multiple hydrophones are arranged on the elastic rope at a certain distance. The sonar platform is mainly used to reduce the background noise in the ship bow sonar area and improve the sonar detection level.

Description

Technical Field

[0001] The invention belongs to the technical field of ship vibration reduction and noise reduction, and in particular relates to a ship bow sonar platform capable of reducing vibration energy transmission. Background Art

[0002] When a ship is sailing, the vibration energy of mechanical equipment is transmitted to the bow sonar cabin through the ship structure, resulting in a large noise value in the bow sonar cabin, which affects the detection capability of the sonar. There are many mechanical equipment on the ship, and the degree and path of the impact on the sonar cabin are different for equipment with different powers and different positions. The equipment closer to the sonar cabin transmits the most vibration energy to the sonar cabin, which is the main reason for the large self-noise of the sonar. How to reduce the impact of vibration and noise on sonar equipment during the navigation of the ship is an urgent problem to be solved. Summary of the invention

[0003] In view of this, the present invention aims to propose a ship bow sonar platform that reduces vibration energy transmission, so as to solve the problem of excessive sonar self-noise during the navigation of the ship.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a ship bow sonar platform for reducing vibration energy transmission, which includes a hydraulic spring damping device, a transmission rod buffer device, a positioning block fixing device and a hydrophone array, the transmission rod buffer device includes a platform, a transmission rod and a supporting spring, the transmission rod includes two mutually hinged rod bodies, and the rod bodies are connected by a supporting spring, the upper end of the platform is connected to the upper deck through the hydraulic spring damping device, the positioning block fixing device includes an upper positioning block and a lower positioning block that are matched and connected, one end of the transmission rod is connected to the platform, and the other end is connected to the upper positioning block, and the lower positioning block is connected to the lower deck, the hydrophone array includes a plurality of hydrophones, an elastic rope and two rigid rods, the two rigid rods are respectively connected to the platform and the upper positioning block, the two ends of the elastic rope are respectively connected to the two rigid rods, and the plurality of hydrophones are arranged on the elastic rope at a certain distance.

[0005] Furthermore, the hydraulic spring shock absorber device includes a sleeve, a spring and a hydraulic shock absorber, the sleeve is connected to the upper deck, the bottom of the hydraulic shock absorber is connected to the platform, the spring is installed on the piston rod of the hydraulic shock absorber, and the upper end of the spring is fixed to the inside of the sleeve.

[0006] Furthermore, a damping layer is arranged between the upper positioning block and the lower positioning block.

[0007] Furthermore, there are multiple hydrophone arrays, and the multiple hydrophone arrays are evenly distributed along the circumference of the platform.

[0008] Furthermore, there are multiple transmission rods, and the multiple transmission rods are evenly distributed along the circumference of the platform.

[0009] Furthermore, there are multiple hydraulic spring vibration reduction devices, and the multiple hydraulic spring vibration reduction devices are evenly distributed along the circumference of the platform.

[0010] Furthermore, the connection between the upper positioning block and the lower positioning block is a sawtooth structure, and the upper positioning block and the lower positioning block are engaged with each other.

[0011] Furthermore, both ends of the transmission rod are connected to the platform and the upper positioning block respectively through connecting devices.

[0012] Furthermore, the rigid rod is in a cantilever structure.

[0013] Furthermore, the transmission rod is a rigid transmission rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a low-noise ship bow sonar platform that can reduce the transmission of vibration energy, which can reduce the transmission of vibration energy to the hydrophone, thereby reducing the impact of the vibration energy of mechanical equipment on the hydrophone and improving the detection capability of the ship sonar.

[0015] Compared with traditional sonar platforms, the sonar platform described in the present invention has a smaller contact area with the hull structure, thereby reducing the mechanical vibration energy received by the sonar platform; a hydraulic spring vibration reduction device and a transmission rod buffer device are used to improve the vibration reduction efficiency; the upper and lower positioning blocks have a serrated structure that bites into each other, which can maintain the stability of the sonar platform, and a damping layer is laid between the upper and lower positioning blocks, which can effectively reduce the transmission of vibration energy from the lower deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a ship bow sonar platform for reducing vibration energy transmission according to the present invention;

[0018] Figure 2 This is a schematic diagram of the planar structure of a ship bow sonar platform for reducing vibration energy transmission according to the present invention;

[0019] Figure 3 This is a schematic structural diagram of the hydraulic spring vibration reduction device described in the present invention.

[0020] 1-upper deck, 2-sleeve, 3-spring, 4-hydraulic shock absorber, 5-platform, 6-connecting device, 7-transmission rod, 8-support spring, 9-hydrophone, 10-upper positioning block, 11-damping layer, 12-lower positioning block, 13-lower deck, 14-elastic rope, 15-rigid rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0022] See also Figure 1-3 To illustrate this embodiment, a ship bow sonar platform for reducing vibration energy transmission includes a hydraulic spring damping device, a transmission rod buffer device, a positioning block fixing device and a hydrophone array;

[0023] The transmission rod buffer device includes a platform 5, a transmission rod 7 and a support spring 8. The transmission rod 7 includes two mutually hinged rod bodies, which are connected by a support spring 8. The support spring 8 has a buffering effect on the rotation of the two rod bodies. The transmission rod 7 is a rigid transmission rod. The upper end of the platform 5 is connected to the upper deck 1 through a hydraulic spring damping device.

[0024] The positioning block fixing device comprises an upper positioning block 10 and a lower positioning block 12 which are matched and connected, one end of the transmission rod 7 is connected to the platform 5, and the other end is connected to the upper positioning block 10, and the lower positioning block 12 is connected to the lower deck 13;

[0025] The hydrophone array includes a plurality of hydrophones 9, an elastic rope 14 and two rigid rods 15. The two rigid rods 15 are respectively connected to the platform 5 and the upper positioning block 10. The rigid rods 15 are in a cantilever structure. Both ends of the elastic rope 14 are respectively connected to the two rigid rods 15. The plurality of hydrophones 9 are arranged on the elastic rope 14 at a certain distance.

[0026] The hydraulic spring damper device comprises a sleeve 2, a spring 3 and a hydraulic damper 4, wherein the sleeve 2 is connected to the upper deck 1, the bottom of the hydraulic damper 4 is connected to the platform 5, the spring 3 is mounted on the piston rod of the hydraulic damper 4, and the upper end of the spring 3 is fixed to the inside of the sleeve 2. The sleeve 2 of the hydraulic spring damper device is fixed to the upper deck 1 by bolts, and the bottom of the hydraulic damper 4 is fixed to the platform 5 by bolts. The spring 3 and the hydraulic damper 4 can effectively block the vibration energy of the mechanical equipment from being transmitted to the sonar platform along the upper deck 1.

[0027] A damping layer 11 is laid between the upper positioning block 10 and the lower positioning block 12. The damping layer 11 can reduce the vibration transmission of the steel structure, play a role of vibration isolation, and can also play a role of active vibration reduction to a certain extent.

[0028] The connection between the upper positioning block 10 and the lower positioning block 12 is a sawtooth structure, and the upper positioning block 10 and the lower positioning block 12 are interlocked and connected. The sawtooth structure interlocks with each other to play a fixing role, and can also leave space to fill the damping material to form the damping layer 11.

[0029] There are multiple hydrophone arrays, and the multiple hydrophone arrays are evenly distributed along the circumference of the platform 5. There are multiple transmission rods 7, and the multiple transmission rods 7 are evenly distributed along the circumference of the platform 5. There are multiple hydraulic spring vibration reduction devices, and the multiple hydraulic spring vibration reduction devices are evenly distributed along the circumference of the platform 5. The number of the hydrophone array, the transmission rod 7 and the hydraulic spring vibration reduction device are all four.

[0030] Both ends of the transmission rod 7 are connected to the platform 5 and the upper positioning block 10 respectively through a connecting device 6. There is a connecting device 6 at each end of the transmission rod 7, one is fixed below the platform 5, and the other is fixed on the upper positioning block 10.

[0031] The working principle of the sonar platform described in this embodiment is as follows:

[0032] In terms of vibration isolation function, when the ship is sailing, the vibration caused by mechanical equipment will be transmitted to the sonar cabin through steel structures such as the deck bulkhead. At this time, the hydraulic spring vibration reduction device and the damping layer 11 between the upper and lower positioning blocks will hinder the vibration transmission of the steel structure and play a vibration isolation role, thereby reducing the self-noise of the bow sonar.

[0033] In terms of vibration reduction function, when the structural vibration caused by mechanical equipment is transmitted to the sonar cabin, the damping layer 11 arranged on the contact surface of the upper and lower positioning blocks can play a role of active vibration reduction to a certain extent. At the same time, the serrated structures of the upper positioning block 10 and the lower positioning block 12 engage with each other to fix the sonar platform and prevent the sonar platform from displacement; the hydraulic shock absorber 4 and the spring 3 mounted on the hydraulic shock absorber 4 can effectively play a role of active vibration reduction, which is mainly manifested in that when the platform tilts in a certain direction, the spring 3 and the hydraulic shock absorber 4 mounted in the hydraulic spring vibration reduction device in that direction generate a reaction force, actively pushing the platform 5 to move to the equilibrium position.

[0034] When the structural vibration caused by the mechanical equipment is too large, the hydraulic spring vibration reduction device will cause the movement amplitude of the platform 5 to increase when it plays a vibration reduction role. The transmission rod buffer device can effectively alleviate this phenomenon, which is mainly manifested in that when the platform 5 moves up and down, it causes the transmission rod 7 to rotate, causing the angle of the transmission rod 7 to change. At this time, the support spring 8 can generate a reaction force to push the transmission rod 7 and the platform 5 to return to a balanced position.

[0035] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A ship bow sonar platform for reducing vibration energy transmission, characterized in that: It comprises a hydraulic spring damping device, a transmission rod buffer device, a positioning block fixing device and a hydrophone array. The transmission rod buffer device comprises a platform (5), a transmission rod (7) and a support spring (8). The transmission rod (7) comprises two mutually hinged rod bodies, which are connected via a support spring (8). The upper end of the platform (5) is connected to an upper deck (1) via a hydraulic spring damping device. The positioning block fixing device comprises an upper positioning block (10) and a lower positioning block (12) which are matched and connected. One end of the transmission rod (7) is connected to the platform (5), and the other end is connected to the upper positioning block (10). The lower positioning block (12) is connected to the lower deck (13). The hydrophone array comprises a plurality of hydrophones (9), an elastic rope (14) and two rigid rods (15). The two rigid rods (15) are respectively connected to the platform (5) and the lower deck (13). The platform (5) is connected to an upper positioning block (10), the two ends of the elastic rope (14) are respectively connected to two rigid rods (15), the multiple hydrophones (9) are arranged on the elastic rope (14) at a certain distance, the hydraulic spring vibration reduction device comprises a sleeve (2), a spring (3) and a hydraulic shock absorber (4), the sleeve (2) is connected to the upper deck (1), the bottom of the hydraulic shock absorber (4) is connected to the platform (5), the spring (3) is installed on the piston rod of the hydraulic shock absorber (4), the upper end of the spring (3) is fixed to the inside of the sleeve (2), a damping layer (11) is provided between the upper positioning block (10) and the lower positioning block (12), the connection between the upper positioning block (10) and the lower positioning block (12) is a sawtooth structure, and the upper positioning block (10) and the lower positioning block (12) are mutually engaged and connected.

2. A ship bow sonar platform for reducing vibration energy transfer according to claim 1, characterized in that: There are multiple hydrophone arrays, and the multiple hydrophone arrays are evenly distributed along the circumference of the platform (5).

3. A ship bow sonar platform for reducing vibration energy transfer according to claim 1, characterized in that: There are a plurality of transmission rods (7), and the plurality of transmission rods (7) are evenly distributed along the circumference of the platform (5).

4. A ship bow sonar platform for reducing vibration energy transfer according to claim 1, characterized in that: There are multiple hydraulic spring vibration reduction devices, and the multiple hydraulic spring vibration reduction devices are evenly distributed along the circumference of the platform (5).

5. A ship bow sonar platform for reducing vibration energy transfer according to claim 1, characterized in that: Both ends of the transmission rod (7) are connected to the platform (5) and the upper positioning block (10) via connecting devices (6) respectively.

6. A ship bow sonar platform for reducing vibration energy transfer according to claim 1, characterized in that: The rigid rod (15) is in a cantilever structure.

7. A ship bow sonar platform for reducing vibration energy transfer according to claim 1, characterized in that: The transmission rod (7) is a rigid transmission rod.

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