CN215682028U - Underwater motor sound insulation cover - Google Patents
Underwater motor sound insulation cover Download PDFInfo
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- CN215682028U CN215682028U CN202121997757.4U CN202121997757U CN215682028U CN 215682028 U CN215682028 U CN 215682028U CN 202121997757 U CN202121997757 U CN 202121997757U CN 215682028 U CN215682028 U CN 215682028U
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Abstract
The utility model provides an underwater motor sound insulation cover to solve current underwater motor sound insulation and adopted thick housing, thicker casing has brought great additional mass and motor and sound insulation cover adopt rigidity lug connection, and the motor vibration is conducted the sound insulation cover easily and is produced the sound radiation, reduces the problem of sound insulation effect. The utility model comprises a motor, a sound insulation housing, an outer mounting frame, an elastic element, an inner mounting frame, a ribbed end cover, a flange structure and bolts, wherein the motor and the sound insulation housing are both hollow cylindrical shell structures, the motor is arranged inside the sound insulation housing, the motor and the sound insulation housing are fixedly supported by the outer mounting frame, the elastic element and the inner mounting frame, the outer mounting frame is connected with the inner wall of the sound insulation housing, the inner mounting frame is connected with the outer wall of the motor, the elastic element is fixed between the outer mounting frame and the inner mounting frame, the two ends of the sound insulation housing are processed into flange structures, the ribbed end covers are arranged at the two ends of the sound insulation housing, and the ribbed end covers are connected with the flange structures through the bolts. The utility model is used for sound insulation and noise reduction of the underwater motor.
Description
Technical Field
The utility model relates to the technical field of vibration and noise reduction, in particular to an underwater motor sound insulation cover.
Background
The sound insulation technology in the air is relatively mature, and comprises sound insulation structures such as single-layer walls, multi-layer walls and sound insulation covers, wherein sound insulation baffles are used for isolating sound sources or the sound insulation covers are used for sealing the sound sources to prevent noise from being transmitted into a working environment, so that the purpose of sound insulation is achieved. Because the acoustic impedance of air is low, the acoustic impedance mismatching is easily realized by adopting common materials, and the aim of sound insulation is easily fulfilled. Under water, because the density and the acoustic impedance of water are both large, the obvious impedance mismatch under water is difficult to realize by using general materials such as steel, and therefore, the sound insulation under water is difficult.
The underwater motor is an important underwater noise source, and the underwater sound insulation of the underwater motor has important engineering application requirements, and researches provide a sound insulation cover design method, wherein a thick cover shell is adopted, and damping materials are laid on the shell to insulate the sound of the underwater motor, so that on one hand, the thicker shell brings larger additional mass and brings inconvenience to engineering application; on the other hand, the motor and the sound insulation cover are in rigid direct connection, and the vibration of the motor is easily transmitted to the sound insulation cover to generate sound radiation, so that the sound insulation effect is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sound insulation cover for an underwater motor, aiming at solving the problems that the sound insulation of the existing underwater motor adopts a thick housing, the thicker housing brings larger additional mass, the motor is directly and rigidly connected with the sound insulation cover, the vibration of the motor is easily transmitted to the sound insulation cover to generate sound radiation, and the sound insulation effect is reduced.
The technical scheme adopted by the utility model for solving the problems is as follows:
the utility model provides an underwater motor sound insulation cover, its constitution includes the motor, the sound insulation housing, outer mounting bracket, elastic element, interior mounting bracket, add the rib end cover, flange structure and bolt, motor and sound insulation housing are hollow cylindrical shell structure, the motor sets up inside the sound insulation housing, through outer mounting bracket between motor and the sound insulation housing, elastic element and interior mounting bracket fixed stay, outer mounting bracket links to each other with sound insulation housing inner wall, interior mounting bracket links to each other with the motor outer wall, elastic element fixes between outer mounting bracket and interior mounting bracket, the flange structure is processed into at the both ends of sound insulation housing, the both ends of sound insulation housing are provided with and add the rib end cover, it passes through bolted connection with the flange structure to add the rib end cover.
Further, the elastic element is a common spring or an air spring.
Further, outer mounting bracket, elastic element and interior mounting bracket constitute elastic component, and elastic component's quantity is eight, and the front end of motor is provided with four elastic component, and the rear end of motor is provided with four elastic component, and these four elastic component set up along same circumference equipartition.
Furthermore, the ribs on the inner wall of the ribbed end cover are arranged vertically and horizontally.
Further, the underwater motor sound insulation cover further comprises a sealing ring, and the sealing ring is arranged between the ribbed end cover and the flange structure.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model provides a design scheme of an underwater motor sound insulation cover with elastic support, the sound insulation cover is connected with a motor through the elastic support, the transmission of the vibration of the motor to the sound insulation cover can be effectively reduced, and compared with rigid connection, the underwater motor sound insulation cover has better vibration isolation and sound insulation effects; the reinforcing ribs on the ribbed end cover can increase the rigidity of the end cover and improve the vibration isolation and sound insulation performance of a low frequency band.
2. Because the elastic coefficient of the spring is large in selectable range, the elastic element is connected by the spring compared with rubber, the springs with different elastic coefficients can be selected according to requirements under the condition that the springs can work normally, and the smaller the elastic coefficient of the spring is, the better the vibration isolation and sound insulation effects are.
3. A closed air layer is formed between the motor and the sound insulation cover, so that water does not enter the motor.
Drawings
FIG. 1 is a perspective view of the overall structure of the sound insulation cover of the underwater motor of the present invention;
FIG. 2 is a schematic radial cross-section of the resilient support position of the present invention;
FIG. 3 is a graph showing the results of the vibration isolation performance calculations according to the present invention;
FIG. 4 is a schematic diagram showing the results of the sound insulation performance calculation of the present invention.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 and 2, the embodiment includes a motor 1, a sound insulation housing 2, an external mounting frame 3, an elastic element 4, an internal mounting frame 5, a ribbed end cover 6, a flange structure 7 and a bolt 8, where the motor 1 and the sound insulation housing 2 are both hollow cylindrical shell structures, the motor 1 is disposed inside the sound insulation housing 2, the motor 1 and the sound insulation housing 2 are fixedly supported by the external mounting frame 3, the elastic element 4 and the internal mounting frame 5, the external mounting frame 3 is connected with the inner wall of the sound insulation housing 2, the internal mounting frame 5 is connected with the outer wall of the motor 1, the elastic element 4 is fixed between the external mounting frame 3 and the internal mounting frame 5, the two ends of the sound insulation housing 2 are processed into the flange structures 7, ribbed end covers 6 are disposed at the two ends of the sound insulation housing 2, and the ribbed end covers 6 are connected with the flange structures 7 through bolts 8.
In the present embodiment, the elastic member 4 is a general spring or an air spring. The elastic element 4 is fixed between the outer mounting frame 3 and the inner mounting frame 5 by welding or bolt connection. The elastic element 4 has an elastic modulus of 2 x 104N/m, when the mass of the motor is 20kg, the static deformation amount of the spring is about 1.5mm, and the normal working range of the spring is ensured.
In this embodiment, the outer mounting frame 3, the elastic element 4 and the inner mounting frame 5 constitute elastic assemblies, the number of the elastic assemblies is eight, the front end of the motor 1 is provided with four elastic assemblies, the rear end of the motor 1 is provided with four elastic assemblies, and the four elastic assemblies are uniformly distributed along the same circumference.
In the present embodiment, the ribs on the inner wall of the ribbed end cap 6 are arranged vertically and horizontally, and the radius of the ribbed end cap 6 is 0.16m and the thickness is 0.004 m. The design can increase the rigidity of the ribbed end cover 6 and inhibit the low-frequency vibration sound radiation of the ribbed end cover.
In the embodiment, the underwater motor sound insulation cover further comprises a sealing ring, the sealing ring is arranged between the ribbed end cover 6 and the flange structure 7, and the sealing ring can play a waterproof role, so that the sound insulation cover shell 2 is guaranteed to have good water tightness underwater.
In the present embodiment, the motor 1 has a radius of 0.1m, a length of 0.3m, and a shell thickness of 0.002 m; the sound insulation housing 2 has the radius of 0.14m, the length of 0.42m and the shell thickness of 0.002 m.
In the embodiment, the materials of the motor 1, the sound insulation housing 2, the outer mounting frame 3, the inner mounting frame 5, the ribbed end cover 6 and the flange structure 7 are alloy steel, and the density is 7850kg/m3Young's modulus of 2.05X 1011Pa and the Poisson ratio of 0.28.
In the present embodiment, the outer mount 3 and the inner mount 5 are of a solid pentahedral structure. The outer mounting frame 3 is connected with the sound insulation housing 2 and is provided with two rectangular surfaces, two right-angle triangular surfaces with arc edges as bottom edges and an outward convex arc surface, and the curvature of the arc surface is the same as that of the side wall of the sound insulation housing 2; the inner mounting frame 5 is connected with the motor 1 and is provided with two rectangular surfaces, two right-angle triangular surfaces with arc edges as bottom edges and an inward concave arc surface, and the curvature of the arc surface is the same as that of the side wall of the motor 1.
With reference to fig. 1, a finite element model of the underwater motor sound insulation cover is established, the mean square vibration velocity of the surface of the sound insulation cover under the condition that whether the end cover of the sound insulation cover is ribbed or not and the mean square vibration velocity of the surface of the motor under the condition that the sound insulation cover is not ribbed are calculated in a simulation mode, and the comparison result is shown in fig. 3. The result shows that the underwater motor sound insulation cover has good vibration isolation performance, the average vibration isolation amount of the full frequency band can reach 59.6dB, and the vibration isolation characteristic of the low frequency band can be improved by ribbing the end cover of the sound insulation cover. The comparison results of the radiation sound power of the motor after the sound insulation cover is installed on the motor under the condition that whether the end cover of the sound insulation cover is ribbed or not and the radiation sound power of the motor under the condition that the sound insulation cover is not arranged are calculated in a simulation mode and are shown in fig. 4. The result shows that the underwater motor sound insulation cover has good sound insulation performance, the average sound insulation quantity of the full frequency band can reach 51.3dB, and the sound insulation characteristic of the low frequency band can be obviously improved by ribbing the end cover of the sound insulation cover.
Claims (5)
1. An underwater motor sound insulation cover comprises a motor (1), a sound insulation housing (2), an outer mounting frame (3), an elastic element (4), an inner mounting frame (5), a ribbed end cover (6), a flange structure (7) and bolts (8), wherein the motor (1) and the sound insulation housing (2) are hollow cylindrical shell structures, the motor (1) is arranged inside the sound insulation housing (2), the motor (1) and the sound insulation housing (2) are fixedly supported by the outer mounting frame (3), the elastic element (4) and the inner mounting frame (5), the outer mounting frame (3) is connected with the inner wall of the sound insulation housing (2), the inner mounting frame (5) is connected with the outer wall of the motor (1), the elastic element (4) is fixed between the outer mounting frame (3) and the inner mounting frame (5), two ends of the sound insulation housing (2) are processed into flange structures (7), ribbed end covers (6) are arranged at two ends of the sound insulation housing (2), and the ribbed end covers (6) are connected with the flange structure (7) through bolts (8).
2. The underwater motor sound insulation cover as claimed in claim 1, wherein: the elastic element (4) adopts a common spring or an air spring.
3. The underwater motor sound insulation cover according to claim 1 or 2, characterized in that: outer mounting bracket (3), elastic element (4) and interior mounting bracket (5) constitute elastic component, and elastic component's quantity is eight, and the front end of motor (1) is provided with four elastic component, and the rear end of motor (1) is provided with four elastic component, and these four elastic component set up along same circumference equipartition.
4. The underwater motor sound insulation cover according to claim 3, characterized in that: the ribs on the inner wall of the ribbed end cover (6) are arranged vertically and horizontally.
5. The underwater motor sound insulation cover according to claim 1, 2 or 4, characterized in that: the underwater motor sound insulation cover further comprises a sealing ring, and the sealing ring is arranged between the ribbed end cover (6) and the flange structure (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121997757.4U CN215682028U (en) | 2021-08-24 | 2021-08-24 | Underwater motor sound insulation cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121997757.4U CN215682028U (en) | 2021-08-24 | 2021-08-24 | Underwater motor sound insulation cover |
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| Publication Number | Publication Date |
|---|---|
| CN215682028U true CN215682028U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121997757.4U Active CN215682028U (en) | 2021-08-24 | 2021-08-24 | Underwater motor sound insulation cover |
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| CN (1) | CN215682028U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116062136A (en) * | 2023-03-22 | 2023-05-05 | 深海技术科学太湖实验室 | Sound insulation cover of outboard propulsion motor |
-
2021
- 2021-08-24 CN CN202121997757.4U patent/CN215682028U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116062136A (en) * | 2023-03-22 | 2023-05-05 | 深海技术科学太湖实验室 | Sound insulation cover of outboard propulsion motor |
| CN116062136B (en) * | 2023-03-22 | 2024-02-02 | 深海技术科学太湖实验室 | Sound insulation cover of outboard propulsion motor |
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