Vibration noise test bench for vibration and noise reduction design of underwater vehicle

Abstract

The invention discloses a vibration noise test bench for vibration and noise reduction design of an underwater vehicle, which comprises a water tank assembly, a simulated underwater vehicle and a noise test sensor, tested damping measures are arranged in the simulated underwater vehicle, the simulated underwater vehicle is fixedly arranged in the water tank assembly, and the noise test sensor is arranged in the simulated underwater vehicle. The noise test sensor is arranged in the water tank assembly, and water is injected into the water tank assembly and submerges the simulated underwater vehicle. The method aims to reduce technical risks for project development, shorten the development period, reduce the development cost and refine the design process while design and product research and development of an underwater vehicle damping system are carried out. Meanwhile, a certain design reference and technical basis are provided for solving the engineering problem of the type.

Description

Technical Field

[0001] The invention relates to the technical field of underwater vehicle noise reduction testing, and in particular to a vibration noise test bench used for underwater vehicle vibration reduction and noise reduction design. Background Art

[0002] Vibration reduction and noise reduction technology has always been one of the key tasks in the research and development of underwater vehicles (torpedoes, submarines, etc.) at home and abroad, and is also the core of the design of the stealth of torpedoes and submarines. For underwater vehicles such as torpedoes and submarines, their vibration and noise levels are not only related to their own stealth performance, but also to the initiative to attack the invading ship torpedoes and other underwater equipment during combat or reconnaissance missions. Relevant studies have shown that for every 6dB reduction in torpedo radiation noise, the distance at which the opponent detects the torpedo can be reduced by half; for every 5dB reduction in radiation noise, the torpedo's self-guided hit rate can be increased by 25%; submarines are similar.

[0003] In order to meet the requirements of vibration and noise reduction for future torpedoes, submarines, ships and various underwater unmanned submersibles, it is necessary to analyze the vibration and noise reduction technology of related equipment and design a vibration and noise test bench for underwater submersibles. Summary of the invention

[0004] The purpose of the present invention is to provide a vibration and noise test bench for underwater submersible vibration and noise reduction design. It aims to carry out the design of underwater submersible vibration reduction system and product development, while reducing technical risks, shortening the development cycle, reducing R&D costs, and refining the design process for project development. At the same time, it provides a certain design reference and technical basis for solving this type of engineering problems.

[0005] To achieve the above object, the present invention is implemented according to the following technical solutions:

[0006] The present invention includes a water tank assembly, a simulated underwater submersible, and a noise test sensor. The simulated underwater submersible is provided with a shock-absorbing measure to be tested, the simulated underwater submersible is fixedly arranged in the water tank assembly, the noise test sensor is arranged in the water tank assembly, and the water in the water tank assembly does not cover the simulated underwater submersible.

[0007] Preferably, two compartments are provided in the water tank assembly, and there are two simulated underwater submersibles, which are respectively located in the two compartments of the water tank assembly.

[0008] Specifically, the simulated underwater submersible includes an acrylic transparent shell, an end cover, an end cover sealing ring, an end cover flange, an end cover handle, an aluminum alloy rib, a motor flange bracket, a tail vertebrae flange, a tail vertebrae sealing ring, a middle section flange, a coupling, a tail shaft, a tail shaft bracket, a tail shaft bracket flange, a tail shaft rib, a tail shaft positioning cone block, a tail section acrylic transparent shell, a simulated propeller, a servo motor, a motor heat dissipation module, and a motor flange. The end cover is sealed and connected to one end of the acrylic transparent shell through the end cover sealing ring and the end cover flange. The end cover handle is fixedly arranged on the outside of the end cover. There are multiple aluminum alloy ribs, and multiple aluminum alloy ribs are fixedly arranged on the inner wall of the acrylic transparent shell. The motor flange bracket is fixedly arranged on the middle section of the inner wall of the acrylic transparent shell. The servo motor is arranged in the motor heat dissipation module. The motor flange is two The two motor flanges are respectively arranged at the two ends of the motor heat dissipation module, the tail vertebrae section flange is fixedly arranged at the other end of the acrylic transparent shell, the motor flange is located in the acrylic transparent shell, the two motor flanges are respectively connected to the motor flange bracket and the tail vertebrae section flange, one end of the tail section acrylic transparent shell is sealed and connected to the other end of the tail vertebrae section flange through the middle section flange and the tail vertebrae section sealing ring, the tail shaft bracket, the tail shaft bracket flange, the tail shaft rib plate, and the tail shaft positioning cone block are all fixedly arranged on the inner wall of the tail section acrylic transparent shell, one end of the tail shaft is connected to the rotating shaft of the servo motor through the coupling, the tail shaft is rotatably connected to the tail shaft positioning cone block and the tail shaft bracket through a bearing, and the other end of the tail shaft is exposed outside the tail section acrylic transparent shell and is connected to the simulated propeller.

[0009] The shock-absorbing measure to be tested is arranged in the acrylic transparent shell or the tail section acrylic transparent shell, where the aluminum alloy ribs, motor flange bracket, tail vertebrae flange, tail shaft ribs, and motor heat dissipation module are arranged in part or all of the positions.

[0010] The acrylic transparent shell is connected to the water tank assembly through a U-shaped bracket, a base bracket, a cushion block, and an air spring shock absorber. The lower end of the air spring shock absorber is fixedly connected to the bottom of the water tank assembly. The U-shaped bracket is sleeved outside the acrylic transparent shell, and the two ends of the U-shaped bracket are fixedly connected to the upper end of the air spring shock absorber through the base bracket and the cushion block.

[0011] The water tank assembly includes an acrylic water tank, an acrylic cover, a solid wood base, and a partition. The solid wood base is arranged at the lower end of the acrylic water tank. The upper end of the acrylic water tank is open. The acrylic cover is detachably connected to the upper end opening of the acrylic water tank. The partition is fixedly arranged in the middle of the acrylic water tank to form two tank bodies. One of the simulated underwater submersibles is respectively arranged on both sides of the partition in the acrylic water tank.

[0012] The beneficial effects of the present invention are:

[0013] The present invention is a vibration and noise test bench for underwater submersible vibration and noise reduction design. Compared with the prior art, the present invention can reduce technical risks, shorten the development cycle, reduce R&D costs, and refine the design process for the development of underwater submersible vibration and noise reduction products. At the same time, it provides a certain design reference and technical basis for solving this type of engineering problems. In addition, the present invention also has the following advantages:

[0014] A large number of threaded interfaces are designed to simulate the power section of underwater submersibles, which facilitates the installation and arrangement of various new vibration reduction measures designed by researchers;

[0015] Conventional vibration sensors can be used to detect the vibration levels of motors, transmission systems, and housing structures in real time. After introducing different vibration reduction measures, the vibration reduction effects can be compared and displayed in real time, making it convenient for researchers to iterate and improve the designed vibration reduction measures in an efficient manner.

[0016] The vibration of the two groups of underwater vehicles is isolated by air damping vibration isolators, so that the vibration of the two groups of underwater vehicles is not disturbed by the test base;

[0017] The two groups of underwater submersibles are installed in acrylic water tanks and separated by gray cast iron partitions to ensure that the test conditions of the two do not interfere with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the decomposed structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the external structure of the present invention;

[0022] Figure 5 This is the first example of the test analysis diagram of the present invention;

[0023] Figure 6 This is the second example of the test analysis diagram of the present invention;

[0024] Figure 7 This is the third example of the test analysis diagram of the present invention.

[0025] In the figure: acrylic transparent shell 1, end cover 2, end cover sealing ring 3, end cover flange 4, end cover handle 5, aluminum alloy rib 6, motor flange bracket 7, tail vertebrae section flange 8, tail vertebrae section sealing ring 9, middle section flange 10, coupling 11, tail shaft 12, tail shaft bracket 13, partition 14, tail shaft bracket flange 15, tail shaft rib 16, tail shaft positioning cone block 17, tail section acrylic transparent shell 18, simulated propeller 19, U-shaped bracket 20, base bracket 21, cushion block 22, air spring shock absorber 23, servo motor 24, motor cooling module 25, motor flange 26, acrylic water tank 27, acrylic cover 28, solid wood base 29. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0027] The present invention is a research platform for conducting vibration and noise control tests on underwater vehicles. The vibration and noise test platform has two groups of underwater vehicle power sections and tail sections with completely identical structural features. During operation, the tail shaft rotation speed and vibration characteristics can be made completely consistent through a motor control system. The vibrations of the two groups of underwater vehicles are isolated through air damping vibration isolators, and noise is isolated through sound insulation boards. Vibration reduction and noise reduction measures are introduced into the power section and tail section of one group of underwater vehicles, and real-time monitoring is performed through sensors to judge the actual effects of different vibration reduction and noise reduction measures.

[0028] like Figure 1-4 As shown: the present invention includes a water tank assembly, a simulated underwater submersible, and a noise test sensor. The simulated underwater submersible is provided with a shock-absorbing measure to be tested, the simulated underwater submersible is fixedly arranged in the water tank assembly, the noise test sensor is arranged in the water tank assembly, and the water in the water tank assembly does not cover the simulated underwater submersible.

[0029] Preferably, two compartments are provided in the water tank assembly, and there are two simulated underwater submersibles, which are respectively located in the two compartments of the water tank assembly.

[0030] Specifically, the simulated underwater submersible includes an acrylic transparent shell 1, an end cover 2, an end cover sealing ring 3, an end cover flange 4, an end cover handle 5, an aluminum alloy rib 6, a motor flange bracket 7, a tail vertebrae segment flange 8, a tail vertebrae segment sealing ring 9, a middle section flange 10, a coupling 11, a tail shaft 12, a tail shaft bracket 13, a tail shaft bracket flange 15, a tail shaft rib 16, a tail shaft positioning cone block 17, a tail section acrylic transparent shell 18, a simulated propeller 19, a servo motor 24, a motor heat dissipation module 25, and a motor The end cover 2 is sealed and connected to one end of the acrylic transparent shell 1 through the end cover sealing ring 3 and the end cover flange 4. The end cover handle 5 is fixedly arranged on the outer side of the end cover 2. There are multiple aluminum alloy ribs 6, and multiple aluminum alloy ribs 6 are fixedly arranged on the inner wall of the acrylic transparent shell 1. The motor flange bracket 7 is fixedly arranged on the middle section of the inner wall of the acrylic transparent shell 1. The servo motor 24 is arranged in the motor heat dissipation module 25. The motor flange 26 There are two motor flanges 26, which are respectively arranged at the two ends of the motor heat dissipation module 25. The tail vertebrae section flange 8 is fixedly arranged at the other end of the acrylic transparent shell 1. The motor flange 26 is located in the acrylic transparent shell 1. The two motor flanges 26 are respectively connected to the motor flange bracket 7 and the tail vertebrae section flange 8. One end of the tail section acrylic transparent shell 18 is sealed and connected to the other end of the tail vertebrae section flange 8 through the middle section flange 10 and the tail vertebrae section sealing ring 9. The tail shaft bracket 13, the tail shaft bracket flange 15, the tail shaft rib 16, and the tail shaft positioning cone block 17 are all fixedly arranged on the inner wall of the tail section acrylic transparent shell 18. One end of the tail shaft 12 is connected to the rotating shaft of the servo motor 24 through the coupling 11. The tail shaft 12 is rotatably connected to the tail shaft positioning cone block 17 and the tail shaft bracket 13 through a bearing. The other end of the tail shaft 12 is exposed outside the tail section acrylic transparent shell 18 and is connected to the simulated propeller 19.

[0031] The shock-absorbing measures to be tested are arranged in the acrylic transparent shell 1 or the tail section acrylic transparent shell 18, where the aluminum alloy ribs 6, the motor flange bracket 7, the tail vertebrae flange 8, the tail shaft ribs 16, and the motor heat dissipation module 25 are arranged in part or all of the positions.

[0032] The acrylic transparent shell 1 is connected to the water tank assembly through a U-shaped bracket 20, a base bracket 21, a cushion block 22, and an air spring shock absorber 23. The lower end of the air spring shock absorber 23 is fixedly connected to the bottom of the water tank assembly. The U-shaped bracket 20 is sleeved on the outside of the acrylic transparent shell 1, and the two ends of the U-shaped bracket 20 are fixedly connected to the upper end of the air spring shock absorber 23 through the base bracket 21 and the cushion block 22.

[0033] The water tank assembly includes an acrylic water tank 27, an acrylic cover 28, a solid wood base 29, and a partition 14. The solid wood base 29 is arranged at the lower end of the acrylic water tank 27. The upper end of the acrylic water tank 27 is open. The acrylic cover 28 is detachably connected to the upper end opening position of the acrylic water tank 27. The partition 14 is fixedly arranged in the middle of the acrylic water tank 27 to form two tank bodies. A simulated underwater submersible is respectively arranged on both sides of the partition 14 in the acrylic water tank 27.

[0034] The end cover, tail section flange, aluminum alloy rib plate, and motor flange bracket are bonded to the acrylic transparent shell with high-strength transparent epoxy glue to ensure its water tightness and strength.

[0035] The diameter of the power section and tail section of the simulated underwater submersible is 300mm, the total length is 760mm, the wall thickness of the power section and tail section shell is 6mm, the inner wall of the shell has 11 groups of aluminum alloy ribs, each group has 12 M3 diameter mounting holes, and the heat dissipation fins of the motor shell are specially treated for installing vibration reduction / noise reduction means. At the same time, the inner wall of the shell can also be treated for vibration reduction and noise reduction. It has two structures: underwater and table. The underwater model is equipped with rotary seals and end face seals. Some parts have higher processing accuracy. The simulated propeller can rotate at full speed of 3000rpm at 20 meters underwater.

[0036] The acrylic water tank is equipped with a drain valve to facilitate drainage operations. Two sets of underwater submersible power sections and tail section structures are installed in the water tank for control tests. They are separated by sound insulation panels in the tank to ensure that the two do not interfere with each other when working.

[0037] The partition plate 14 is made of grey cast iron, has a thickness of 20 mm, and has good vibration and sound insulation properties.

[0038] The sealing structure of the simulated underwater submersible power section and tail section assembly is divided into front and rear end face seals and output shaft rotary seals. The end face seal adopts O-type silicone rubber ring with a compression rate of 25%; the output shaft rotary seal adopts a group of Gley rings with carbon fiber protection rings and a group of pan-plug seals, which can meet the sealing performance of 4000 revolutions underwater.

[0039] The vibration and noise sources mainly come from the servo motor and the tail shaft system. The motor has an operating speed of 200-4000 rpm and can be adjusted steplessly. The motor has different vibration characteristics at different speeds. Eccentricity can be introduced into the motor housing, rotating shaft system, and simulated propeller to simulate various vibration conditions. A noise source can also be set inside the housing to simulate the required noise. The motor has an operating speed of 200-4000 rpm and can be adjusted steplessly. The motor has different vibration characteristics at different speeds. Eccentricity can also be introduced into the motor housing, rotating shaft system, and simulated propeller to simulate various vibration conditions. A noise source can also be set inside the housing to simulate the required noise.

[0040] It is flexibly supported by 8 air spring shock absorbers to ensure that the vibration generated during operation will not be transmitted to the solid wood base.

[0041] The test process of the vibration and noise test bench for underwater submersible vibration and noise reduction design of the present invention is as follows:

[0042] 1. The vibration and noise test bench for the vibration and noise reduction design of the underwater submersible according to the present invention is placed horizontally on the ground;

[0043] 2. Lay vibration reduction and noise reduction measures on one of the two groups of simulated underwater submersible power section and tail section, and the positions may be aluminum alloy ribs, motor flange brackets, tail cone flange, tail shaft bracket flange, tail shaft ribs, motor heat dissipation module and part or all of the above positions;

[0044] 3. Lay universal vibration and noise test sensors on the power section and tail section shells of two groups of simulated underwater submersibles and nearby locations;

[0045] 4. Fill the acrylic water tank 27 with water until the water level completely submerges the power section and tail section of the two sets of underwater submersibles;

[0046] 5 First check the waterproof measures of the power section and tail section of the simulated underwater submersible, then power on the power system, check the operation of each motor, slowly increase the motor speed from 100rpm to 3000rpm, and then slowly decrease it to 100rpm, and check whether the tail shaft rotary seal fails;

[0047] 6. Vibration and noise test: The sensor is powered on to analyze the vibration and noise of the underwater vehicle power section and tail section, and conduct vibration and noise comparison tests. The vibration and noise of the underwater vehicle power section and tail section are measured on site, and the characteristic value parameters of the two groups of underwater vehicle power section and tail section multi-channel are displayed simultaneously. The vibration response of the simulated underwater vehicle power section and tail section with or without various vibration and noise reduction measures is reflected in real time, providing convenience and reference for the improvement and upgrading of subsequent vibration and noise reduction products.

[0048] Figure 5 It is a comparison of the vibration acceleration levels at the vibration pickup points on the power section and tail section casing of an underwater submersible in the frequency range of 0-5KHz without any vibration and noise reduction measures and with three different vibration and noise reduction measures. Figure 6 It is a comparison of the vibration acceleration levels at the vibration pickup points of the power section and tail section casing of an underwater submersible in the frequency range of 5-10KHz without any vibration and noise reduction measures and with three different vibration and noise reduction measures. Figure 7 It is a comparison of the vibration acceleration levels at the vibration pickup points of the power section and tail section casing of an underwater submersible in the frequency range of 10-15KHz without any vibration and noise reduction measures and with three different vibration and noise reduction measures.

[0049] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A vibration and noise test bench for underwater submersibles, characterized by: It includes a water tank assembly, a simulated underwater submersible, and a noise test sensor. The simulated underwater submersible is provided with a shock-absorbing measure to be tested. The simulated underwater submersible is fixedly arranged in the water tank assembly. The noise test sensor is arranged in the water tank assembly. The water tank assembly is filled with water but does not cover the simulated underwater submersible.

2. The vibration and noise test bench for underwater vehicle vibration and noise reduction design according to claim 1 is characterized by: Two compartments are arranged in the water tank assembly, and there are two simulated underwater submersibles, which are respectively located in the two compartments of the water tank assembly.

3. The vibration and noise test bench for underwater vehicle vibration and noise reduction design according to claim 2 is characterized by: The simulated underwater submersible comprises an acrylic transparent shell (1), an end cover (2), an end cover sealing ring (3), an end cover flange (4), an end cover handle (5), an aluminum alloy rib plate (6), a motor flange bracket (7), a tail vertebrae section flange (8), a tail vertebrae section sealing ring (9), a middle section flange (10), a coupling (11), a tail shaft (12), a tail shaft bracket (13), a tail shaft bracket flange (15), a tail shaft rib plate (16), a tail shaft positioning cone block (17), a tail section acrylic transparent shell (18), a simulated propeller (19), a servo motor (24), and a motor heat dissipation module ( 25), a motor flange (26), the end cover (2) is sealed and connected to one end of the acrylic transparent shell (1) through an end cover sealing ring (3) and an end cover flange (4), the end cover handle (5) is fixedly arranged on the outer side of the end cover (2), there are a plurality of aluminum alloy ribs (6), and the plurality of aluminum alloy ribs (6) are fixedly arranged on the inner wall of the acrylic transparent shell (1), the motor flange bracket (7) is fixedly arranged on the middle section of the inner wall of the acrylic transparent shell (1), the servo motor (24) is arranged in the motor heat dissipation module (25), and the motor There are two flanges (26), the two motor flanges (26) are respectively arranged at the two ends of the motor heat dissipation module (25), the tail vertebrae section flange (8) is fixedly arranged at the other end of the acrylic transparent shell (1), the motor flange (26) is located in the acrylic transparent shell (1), the two motor flanges (26) are respectively connected to the motor flange bracket (7) and the tail vertebrae section flange (8), one end of the tail section acrylic transparent shell (18) is connected to the other end of the tail vertebrae section flange (8) through the middle section flange (10) and the tail vertebrae section sealing ring (9). One end is sealed and connected, the tail shaft bracket (13), the tail shaft bracket flange (15), the tail shaft rib plate (16), and the tail shaft positioning cone block (17) are all fixedly arranged on the inner wall of the tail section acrylic transparent shell (18), one end of the tail shaft (12) is connected to the rotating shaft of the servo motor (24) through the coupling (11), the tail shaft (12) is rotatably connected to the tail shaft positioning cone block (17) and the tail shaft bracket (13) through a bearing, and the other end of the tail shaft (12) is exposed outside the tail section acrylic transparent shell (18) and is connected to the simulated propeller (19).

4. The vibration and noise test bench for underwater vehicle vibration and noise reduction design according to claim 3 is characterized by: The shock-absorbing measure to be tested is arranged in the acrylic transparent shell (1) or the tail section acrylic transparent shell (18) and is arranged at a part or all of the positions of the aluminum alloy rib plate (6), the motor flange bracket (7), the tail vertebrae section flange (8), the tail shaft rib plate (16), and the motor heat dissipation module (25).

5. The vibration and noise test bench for underwater vehicle vibration and noise reduction design according to claim 3 is characterized by: The acrylic transparent shell (1) is connected to the water tank assembly via a U-shaped bracket (20), a base bracket (21), a cushion block (22), and an air spring damper (23); the lower end of the air spring damper (23) is fixedly connected to the bottom of the water tank assembly; the U-shaped bracket (20) is sleeved outside the acrylic transparent shell (1); and the two ends of the U-shaped bracket (20) are fixedly connected to the upper end of the air spring damper (23) via the base bracket (21) and the cushion block (22).

6. The vibration and noise test bench for underwater vehicle vibration and noise reduction design according to claim 5 is characterized by: The water tank assembly comprises an acrylic water tank (27), an acrylic cover plate (28), a solid wood base (29), and a partition plate (14); the solid wood base (29) is arranged at the lower end of the acrylic water tank (27); the upper end of the acrylic water tank (27) is open; the acrylic cover plate (28) is detachably connected to the upper end opening of the acrylic water tank (27); the partition plate (14) is fixedly arranged in the middle of the acrylic water tank (27) to form two tank bodies; and one of the simulated underwater submersibles is respectively arranged on both sides of the partition plate (14) in the acrylic water tank (27).

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