Vibration and noise reduction device for motor of unmanned underwater vehicle

Abstract

The invention relates to the field of vibration and noise reduction of underwater vehicles, in particular to an unmanned underwater vehicle motor vibration and noise reduction device which comprises a motor supporting mechanism and an axial vibration reduction mechanism, and the motor supporting mechanism comprises a supporting platform and an arc-shaped supporting plate. The arc-shaped supporting plate is fixedly installed on the supporting platform, an installation groove with an upward opening is formed in the arc-shaped supporting plate, the installation groove is used for carrying a motor, and a vibration reduction damper set is arranged in the arc-shaped supporting plate; the axial vibration reduction mechanism comprises a magneto-rheological damper, a coupler and a shaft rod, the magneto-rheological damper, the coupler and the shaft rod are arranged in the installation groove, the vibration reduction damper set is arranged in the motor supporting mechanism, the magneto-rheological damper is arranged on the axial face of the motor, and through the synergistic effect of the radial vibration control system and the axial vibration control system, the vibration reduction effect of the motor is improved. Vibration control in the horizontal direction and the vertical direction is achieved, and the vibration reduction effect of the device on the motor is remarkably improved.

Description

Technical Field

[0001] The invention relates to the field of vibration reduction and noise reduction of underwater vehicles, and in particular to a vibration reduction and noise reduction device for a motor of an unmanned underwater vehicle. Background Art

[0002] Unmanned underwater vehicles, with their autonomy, flexibility, versatility and strong environmental adaptability, have demonstrated great application potential and strategic value in many fields such as marine science and resource development.

[0003] Mechanical vibration and noise are one of the main factors that restrict the performance of unmanned underwater vehicles, and have a significant impact on the stealth and self-guidance of unmanned underwater vehicles. When the unmanned underwater vehicle is sailing at a low speed, the motor becomes the main source of vibration and noise in the unmanned underwater vehicle equipment. The mechanical vibration is transmitted to the surrounding water through the hull and is captured by the long-distance hydrophone, thus affecting the stealth of the vehicle. In addition, mechanical noise may also be transmitted to the sensors inside the vehicle through structures such as the shell and pipes, interfering with its data collection and processing. Therefore, it is necessary to put forward higher requirements on the vibration isolation and sound insulation performance of the equipment carried by the unmanned underwater vehicle, and it is necessary to design a vibration reduction mechanism that attenuates and absorbs the exciting force generated by the motor equipment.

[0004] At present, similar technical problems in the field of ship motor vibration reduction are usually solved by adding a vibration reduction unit (spring damper) under the motor to control and attenuate the vibration. The principle is to buffer the motor vibration by reciprocating motion under the force of the spring. However, the effect of motor noise reduction and vibration reduction using only spring dampers is poor, and it still does not meet the requirements in the application scenario of unmanned underwater vehicles. Therefore, it is necessary to propose a vibration reduction and noise reduction device for unmanned underwater vehicle motors. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] The present invention provides a motor vibration reduction and noise reduction device for an unmanned underwater vehicle, comprising a motor support mechanism and an axial vibration reduction mechanism, wherein the motor support mechanism comprises a support platform and an arc-shaped support plate, wherein the arc-shaped support plate is fixedly mounted on the support platform, wherein the arc-shaped support plate forms an upwardly open mounting groove, wherein the mounting groove is used to carry a motor, wherein a vibration reduction damper group is arranged inside the arc-shaped support plate; wherein the axial vibration reduction mechanism comprises a magnetorheological damper, a coupling and a shaft arranged in the mounting groove, wherein the magnetorheological damper is connected to one end of the coupling via the shaft, and the other end of the coupling is used to be connected to an output shaft of the motor.

[0007] The beneficial effects of the unmanned underwater vehicle motor vibration reduction and noise reduction device of the present invention are as follows: by arranging a vibration reduction damper group in the motor support mechanism and arranging a magnetorheological damper on the motor shaft surface, vibration control in the horizontal and vertical directions is achieved through the synergistic effect of the radial and axial vibration control systems, which significantly improves the vibration reduction effect of the device on the motor.

[0008] Furthermore, the vibration damper group includes three vibration dampers, and the three vibration dampers are respectively located on the left side, the lower side and the right side of the arc-shaped support plate to control the radial vibration of the motor from three directions.

[0009] Furthermore, the vibration damper is a tuned liquid damper, which is cylindrical in shape. The arc-shaped support plate is provided with a receiving cavity and an inlet and outlet matching the tuned liquid damper. The tuned liquid damper is filled with liquid. The liquid in the tuned liquid damper shakes to generate a damping force, and the inertia and viscous resistance of the liquid are used to absorb and dissipate the energy generated by the vibration of the motor, thereby achieving the purpose of vibration reduction.

[0010] Furthermore, a controller is provided on the supporting platform, and a sensor is provided on the shaft rod, wherein the sensor is used to capture the axial vibration of the motor, and the controller is electrically connected to the sensor and the magnetorheological damper respectively, and the controller is used to adjust the output current according to the input signal of the sensor to control the damping force output by the magnetorheological damper, thereby effectively suppressing the axial vibration of the motor.

[0011] Furthermore, the arc-shaped support plate is provided with an elastic support pad located at the bottom of the mounting groove. The elastic support pad has good elasticity and flexibility, can absorb and disperse the impact force caused by the vibration of the motor, and further improves the vibration reduction effect of the device on the motor.

[0012] Furthermore, the unmanned underwater vehicle motor vibration reduction and noise reduction device also includes a plurality of longitudinal vibration isolation mechanisms, and the plurality of longitudinal vibration isolation mechanisms are distributed on the bottom surface of the support platform to improve the vibration reduction effect of the device on the motor in the longitudinal direction.

[0013] Furthermore, the longitudinal vibration isolation mechanism includes an upper end plate, a lower end plate and a vibration isolation rubber body arranged between the upper end plate and the lower end plate, the upper end plate is fixedly connected to the bottom surface of the support platform, and the vibration isolation rubber body can effectively absorb and suppress the impact force caused by the motor vibration.

[0014] Furthermore, a cavity is provided in the vibration isolation rubber body, which can increase the elasticity of the vibration isolation rubber body, make its structural force more reasonable, and have better vibration isolation performance. An air nozzle connected to the cavity is provided on the vibration isolation rubber body. When the vibration isolation rubber body is under pressure, the air in the cavity can be discharged through the air nozzle, thereby consuming the impact force caused by the vibration of the motor and further improving the vibration reduction effect of the device on the motor.

[0015] Furthermore, the motor support mechanism also includes an arc-shaped cover plate, which is symmetrically arranged with the arc-shaped support plate. The arc-shaped cover plate and the arc-shaped support plate enclose a receiving cavity, and the receiving cavity is used to accommodate the motor, which can further fix the installation position of the motor and ensure that the motor is installed firmly and accurately.

[0016] Furthermore, the arc-shaped cover plate is provided with a plurality of resonance cavities arranged along the arc surface and extending in the axial direction, which can produce a resonance effect, effectively absorb or attenuate vibration energy, and achieve the purpose of reducing vibration and noise.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 Axonometric view of the motor vibration and noise reduction device for unmanned underwater vehicles; Figure 2 is a cross-sectional view of the arc-shaped support plate; Figure 3 This is a schematic diagram of the installation of the magnetorheological damper; Figure 4 is a cross-sectional view of the longitudinal vibration isolation mechanism; Figure 5 A cross-sectional view of the curved cover plate.

[0019] In the attached drawings: 1-motor; 2-support platform; 21-arc support plate; 22-arc cover plate; 221-resonance cavity; 23-elastic support pad; 3-vibration damper; 41-magnetorheological damper; 42-controller; 43-sensor; 5-shaft; 6-coupling; 7-longitudinal vibration isolation mechanism; 71-upper end plate; 72-lower end plate; 73-vibration isolation rubber body; 74-cavity; 75-air nozzle. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to 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 invention.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Combine the following Figures 1 to 5 Embodiments of the present invention are described.

[0024] The present embodiment relates to an unmanned underwater vehicle motor vibration reduction and noise reduction device. Currently, the motor noise reduction and vibration reduction device has not met the requirements in the application scenarios of unmanned underwater vehicles. The present embodiment proposes an unmanned underwater vehicle motor vibration reduction and noise reduction device that improves the vibration reduction effect through the synergistic effect of radial and axial vibration control systems.

[0025] An embodiment of the present invention provides a motor vibration reduction and noise reduction device for an unmanned underwater vehicle, including a motor support mechanism and an axial vibration reduction mechanism, wherein the motor support mechanism includes a support platform 2 and an arc-shaped support plate 21, wherein the arc-shaped support plate 21 is fixedly mounted on the support platform 2, wherein the arc-shaped support plate 21 forms an upwardly open mounting groove, wherein the mounting groove is used to carry a motor 1, and a vibration reduction damper group is arranged inside the arc-shaped support plate 21; wherein the axial vibration reduction mechanism includes a magnetorheological damper 41, a coupling 6 and a shaft 5 arranged in the mounting groove, wherein the magnetorheological damper 41 is connected to one end of the coupling 6 through the shaft 5, and the other end of the coupling 6 is used to be connected to the output shaft of the motor 1.

[0026] The motor vibration reduction and noise reduction device of this embodiment is fixedly installed at a preset position of the unmanned underwater vehicle. By arranging a vibration reduction damper group in the motor support mechanism and arranging a magnetorheological damper 41 on the axial surface of the motor 1, horizontal and vertical vibration control is achieved through the synergistic effect of the radial and axial vibration control systems, which significantly improves the vibration reduction effect of the device on the motor 1.

[0027] Furthermore, the vibration damper group includes three vibration dampers 3, and the three vibration dampers 3 are respectively located on the left side, the lower side and the right side of the arc-shaped support plate 21, so as to control the radial vibration of the motor from three directions.

[0028] Furthermore, the vibration-absorbing damper 3 is a tuned liquid damper, which is cylindrical in shape. The arc-shaped support plate 21 is provided with a receiving cavity and an inlet and outlet matching the tuned liquid damper. The tuned liquid damper is filled with liquid. In this embodiment, the radial vibration of the motor 1 causes the liquid in the tuned liquid damper to slosh and generate a damping force. The inertia and viscous resistance of the liquid are used to absorb and dissipate the energy generated by the vibration of the motor 1, thereby achieving the purpose of vibration reduction.

[0029] Furthermore, a controller 42 is provided on the support platform, and a sensor 43 is provided on the shaft 5. The sensor 43 is used to capture the axial vibration of the motor 1. The controller 42 is electrically connected to the sensor 43 and the magnetorheological damper 41 respectively. The controller 42 is used to adjust the output current according to the input signal of the sensor 43 to control the damping force output by the magnetorheological damper 41, thereby effectively suppressing the axial vibration of the motor. In this embodiment, the axial vibration generated by the motor 1 is captured by the sensor 43, and the sensor 43 transmits the axial vibration signal of the motor 1 to the controller 42. The controller 42 adjusts the current intensity output to the magnetorheological damper 41 according to the signal; the magnetorheological damper 41 includes an excitation coil and a magnetorheological fluid, and the strength of the magnetic field can be controlled by adjusting the current intensity in the excitation coil, thereby adjusting the viscosity and damping force of the magnetorheological fluid. Therefore, the current intensity of the excitation coil is controlled by the controller 42 to ensure the accuracy of the damping force output by the magnetorheological damper 41.

[0030] Furthermore, an elastic support pad 23 is provided on the arc support plate 21, and the elastic support pad 23 is located at the bottom of the installation groove. The elastic support pad 23 has good elasticity and flexibility, and can absorb and disperse the impact force caused by the vibration of the motor, thereby further improving the vibration reduction effect of the device on the motor.

[0031] Furthermore, the unmanned underwater vehicle motor vibration reduction and noise reduction device also includes a plurality of longitudinal vibration isolation mechanisms 7, and the plurality of longitudinal vibration isolation mechanisms 7 are distributed on the bottom surface of the support platform 2. In this embodiment, the number of the longitudinal vibration isolation mechanisms 7 is four, which are distributed at the four corners of the bottom surface of the support platform 2. The support platform 2 is mounted by the longitudinal vibration isolation mechanisms 7 to improve the vibration reduction effect of the device on the motor in the longitudinal direction.

[0032] Furthermore, the longitudinal vibration isolation mechanism 7 includes an upper end plate 71, a lower end plate 72, and a vibration isolation rubber body 73 arranged between the upper end plate 71 and the lower end plate 72. The upper end plate 71 is fixedly connected to the bottom surface of the support platform 2. The use of the vibration isolation rubber body 73 in this embodiment can effectively absorb and suppress the impact force caused by the motor vibration.

[0033] Furthermore, a cavity 74 is provided in the vibration isolation rubber body 73, which can increase the elasticity of the vibration isolation rubber body 73, make its structural force more reasonable, and have better vibration isolation performance. An air nozzle 75 connected to the cavity 74 is provided on the vibration isolation rubber body 73. When the vibration isolation rubber body 73 is pressurized, the air in the cavity 74 can be discharged through the air nozzle 75, thereby consuming the impact force caused by the vibration of the motor and further improving the vibration reduction effect of the device on the motor.

[0034] Furthermore, the motor support mechanism also includes an arc-shaped cover plate 22, which is symmetrically arranged with the arc-shaped support plate 21. The arc-shaped cover plate 22 and the arc-shaped support plate 21 enclose a receiving cavity, and the receiving cavity is used to accommodate the motor 1, which can further fix the installation position of the motor and ensure that the motor is installed firmly and accurately.

[0035] Furthermore, a plurality of resonance cavities 221 arranged along the arc surface and extending axially are provided in the arc-shaped cover plate 22. The resonance effect generated by the resonance cavity 221 in this embodiment can effectively absorb or attenuate vibration energy, thereby achieving the purpose of reducing vibration and noise.

[0036] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A vibration and noise reduction device for an unmanned underwater vehicle motor, characterized in that: It includes a motor support mechanism and an axial vibration reduction mechanism, wherein the motor support mechanism includes a support platform and an arc-shaped support plate, wherein the arc-shaped support plate is fixedly mounted on the support platform, wherein the arc-shaped support plate forms a mounting groove open upward, wherein the mounting groove is used to carry the motor, and a vibration reduction damper group is arranged inside the arc-shaped support plate; wherein the axial vibration reduction mechanism includes a magnetorheological damper, a coupling and a shaft arranged in the mounting groove, wherein the magnetorheological damper is connected to one end of the coupling via the shaft, and the other end of the coupling is used to be connected to the output shaft of the motor.

2. The unmanned underwater vehicle motor vibration reduction and noise reduction device according to claim 1, characterized in that: The vibration damper group includes three vibration dampers, and the three vibration dampers are respectively located on the left side, the lower side and the right side of the arc-shaped support plate.

3. The motor vibration and noise reduction device for an unmanned underwater vehicle according to claim 2, characterized in that: The vibration reduction damper is a tuned liquid damper.

4. The motor vibration and noise reduction device for an unmanned underwater vehicle according to claim 1, characterized in that: A controller is provided on the supporting platform, and a sensor is provided on the shaft rod. The sensor is used to capture the axial vibration of the motor. The controller is electrically connected to the sensor and the magnetorheological damper respectively. The controller is used to adjust the output current according to the input signal of the sensor to control the damping force output by the magnetorheological damper.

5. The unmanned underwater vehicle motor vibration reduction and noise reduction device according to claim 1, characterized in that: The arc-shaped support plate is provided with an elastic support pad, and the elastic support pad is located at the bottom of the installation groove.

6. The unmanned underwater vehicle motor vibration reduction and noise reduction device according to claim 1, characterized in that: The unmanned underwater vehicle motor vibration reduction and noise reduction device also includes a plurality of longitudinal vibration isolation mechanisms, and the plurality of longitudinal vibration isolation mechanisms are distributed on the bottom surface of the support platform.

7. The unmanned underwater vehicle motor vibration reduction and noise reduction device according to claim 6, characterized in that: The longitudinal vibration isolation mechanism comprises an upper end plate, a lower end plate and a vibration isolation rubber body arranged between the upper end plate and the lower end plate, and the upper end plate is fixedly connected to the bottom surface of the support platform.

8. The motor vibration and noise reduction device for an unmanned underwater vehicle according to claim 7, characterized in that: A cavity is arranged in the vibration-isolating rubber body, and an air nozzle communicating with the cavity is arranged on the vibration-isolating rubber body.

9. The unmanned underwater vehicle motor vibration reduction and noise reduction device according to claim 1, characterized in that: The motor support mechanism further comprises an arc-shaped cover plate, which is symmetrically arranged with the arc-shaped support plate. The arc-shaped cover plate and the arc-shaped support plate enclose a containing cavity, and the containing cavity is used to contain the motor.

10. The motor vibration and noise reduction device for an unmanned underwater vehicle according to claim 9, characterized in that: A plurality of resonance cavities arranged along the arc surface and extending along the axial direction are arranged in the arc-shaped cover plate.

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