CN112648463A - Frequency-adjustable resonance type water pipeline silencer - Google Patents
Frequency-adjustable resonance type water pipeline silencer Download PDFInfo
- Publication number
- CN112648463A CN112648463A CN201910953382.2A CN201910953382A CN112648463A CN 112648463 A CN112648463 A CN 112648463A CN 201910953382 A CN201910953382 A CN 201910953382A CN 112648463 A CN112648463 A CN 112648463A
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- pipe
- perforated pipe
- cavity
- water inlet
- water outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/0333—Noise absorbers by means of an active system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
- F16L55/052—Pneumatic reservoirs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a resonance type water pipeline silencer with adjustable frequency, wherein an adjustable water inlet perforated pipe and an adjustable water outlet perforated pipe which can axially move are supported on the two end walls of a silencer shell; a fixed water inlet perforated pipe and a fixed water outlet perforated pipe are fixedly arranged in a shell cavity of the silencer shell, the fixed water inlet perforated pipe and the fixed water outlet perforated pipe are fixedly connected with each other through a throttling ring, the fixed water inlet perforated pipe is sleeved on the adjustable water inlet perforated pipe, and the fixed water outlet perforated pipe is sleeved on the adjustable water outlet perforated pipe; a separation pipe is fixedly arranged in the shell cavity of the silencer shell, a cavity between the separation pipe and the silencer shell is divided into a resonant cavity and an energy storage cavity by a separation rib plate, a perforated hole is arranged on the body of the separation pipe corresponding to the energy storage cavity, an energy storage air bag is filled in the energy storage cavity, the inner pipe side of the separation pipe is an expansion cavity, and a resonance neck pipe arranged on a throttling ring is communicated with the resonant cavity along the radial direction. The silencer can adjust the silencing frequency, and has wide silencing frequency band and low fluid resistance.
Description
Technical Field
The invention relates to the technical field of noise control of ship water pipelines, in particular to a silencer for inhibiting hydrodynamic noise in a ship water pipeline.
Background
The seawater inlet and outlet of ship and submarine, especially the seawater outlet, has the characteristics of large flow and strong pulsating force, it is easy to form fluid jet noise, and also easy to impact the ship body to cause the vibration radiation noise of the ship body, and its radiation efficiency is high, not only directly affects the concealment of ship and submarine, but also can produce great influence on human life and working environment.
There is a significant difference in pressure pulsations in the water and air lines of a ship: firstly, air noise and water noise have different media, and the difference between the characteristic impedance of the air media and the characteristic impedance of the water is more than 3000 times; secondly, the sound absorption and insulation materials commonly used in air media are basically transparent in liquid media, the air has good compressibility, most of the air silencers work under lower pressure, and the water pipeline silencers bear a wide working pressure range, so that the water silencer and the air silencer have great difference in silencing mechanism. Although the development of air mufflers has been advanced, relatively few water line mufflers have been developed, and the design of water line mufflers cannot be fully used for reference or compared with the design of air mufflers due to the difference in the properties of two fluid media, water and air.
The existing hydrodynamic muffler mainly adopts an expansion type, resonance type and other resistant muffling structures and an energy accumulator which are evolved from an air muffler, on one hand, because water noise and air noise in a water pipeline have different media, the muffling mechanism of the existing hydrodynamic muffler has great difference, and the air muffler is not completely suitable for water muffling; on the other hand, in a water pipe system, there is medium-high frequency noise in addition to low frequency noise generated by a main noise source such as a pump and a valve, and it is difficult to sufficiently attenuate the low frequency noise by a single noise cancellation mode. Meanwhile, the inherent frequency of the existing hydrodynamic muffler is also fixed and unchanged, and the application range of the muffler is limited, so that the muffler for the water pipeline installed in the existing pipeline is often narrow in muffling frequency band, difficult to cover the noise frequency band with high sound level, and easy to form large flow resistance in the pipeline.
Disclosure of Invention
The invention aims to solve the technical problem of providing a frequency-adjustable resonance type water pipeline silencer which can adjust the silencing frequency and realize broadband silencing.
In order to solve the technical problem, the frequency-adjustable resonant water pipeline silencer comprises a silencer shell, wherein an adjustable water inlet perforated pipe and an adjustable water outlet perforated pipe which can axially move are supported on the two end walls of the silencer shell; a fixed water inlet perforated pipe and a fixed water outlet perforated pipe are fixedly arranged in the cavity of the shell of the silencer shell, the fixed water inlet perforated pipe and the fixed water outlet perforated pipe are fixedly connected with each other through a throttling ring, the fixed water inlet perforated pipe is sleeved on the adjustable water inlet perforated pipe, and the fixed water outlet perforated pipe is sleeved on the adjustable water outlet perforated pipe; a separation pipe is fixedly arranged in the shell cavity of the silencer shell, a cavity between the separation pipe and the silencer shell is divided into a resonant cavity and an energy storage cavity by a separation rib plate, a through hole is formed in the body of the separation pipe corresponding to the energy storage cavity, an energy storage air bag is filled in the energy storage cavity, the inner pipe side of the separation pipe is an expansion cavity, and a resonance neck pipe arranged on a throttling ring is communicated with the resonant cavity along the radial direction.
Preferably, the center lines of the adjustable water inlet perforated pipe and the adjustable water outlet perforated pipe are positioned on the center line of the silencer casing.
Preferably, the separating rib plates are two, the two separating rib plates separate the cavity between the separating pipe and the muffler shell into two energy storage cavities and a resonant cavity, and the two energy storage cavities are respectively located at two sides of the resonant cavity.
Preferably, a sealing element is arranged on a bearing surface of the adjustable water inlet perforated pipe corresponding to the silencer shell; and a sealing element is also arranged on the bearing surface of the adjustable water outlet perforated pipe corresponding to the silencer shell.
Preferably, the sealing element is an O-ring or/and a lip-ring.
Preferably, both ends of the muffler shell are provided with positioning screws respectively corresponding to the adjustable water inlet perforated pipe and the adjustable water outlet perforated pipe.
Preferably, the outer diameter of the throttling ring is equal to the outer diameters of the fixed water inlet perforated pipe and the fixed water outlet perforated pipe, and the inner diameter of the throttling ring is smaller than the inner diameters of the adjustable water inlet perforated pipe and the adjustable water outlet perforated pipe.
Preferably, the cross section of the throttle ring is isosceles trapezoid.
Preferably, the perforation apertures on the adjustable water inlet perforated pipe and the fixed water inlet perforated pipe are equal, the perforation aperture is 10mm, and the perforation rate is 20%; the perforation apertures on the adjustable water outlet perforated pipe and the fixed water outlet perforated pipe are equal, the perforation aperture is 10mm, and the perforation rate is 20%.
Preferably, the aperture of the perforation on the tube body of the separation tube is 6mm, and the perforation rate of the separation tube is 20%.
In the structure, the adjustable perforated pipe and the fixed perforated pipe which can be axially movably sleeved are arranged at the two ends of the silencer shell, the relative positions of the adjustable perforated pipe and the fixed perforated pipe can be adjusted and locked, the pore overlapping ratio of the two perforated sections can be changed by adjusting the axial relative positions of the adjustable perforated pipe and the fixed perforated pipe, and then the perforation rate and the actual pore size of the whole silencer are changed, so that the perforation impedance is changed, and the acoustic performance of the silencer can be adjusted; when the actual perforation rate of the perforated pipe is lower, the fluid resistance loss of the silencer is smaller, and the effective silencing frequency band is increased along with the increase of the perforation rate; therefore, the overlap ratio of the holes on the perforated pipe is adjusted, the perforation rate of the whole silencer is changed, the silencing frequency of the silencer is further changed, the silencing requirements of different noise frequencies are met, the adjustability of the silencing frequency is high, and broadband hydrodynamic noise can be effectively restrained.
On one hand, due to the fact that the throttle ring is arranged between the fixed water inlet perforated pipe and the fixed water outlet perforated pipe, on the other hand, through the expansion of a flow passage of the throttle ring, sound waves are suddenly expanded on the section of the throttle ring to cause the acoustic impedance in the passage to suddenly change, reflection and interference phenomena occur again in the passage, and secondary medium and low frequency noise elimination is formed; on the other hand, the flow dividing function of the throttling ring forces partial water flow to be divided by a gap flow passage between the adjustable perforated pipe and the fixed perforated pipe and an inner hole flow passage of the throttling ring respectively, so that the flow speed of the water flow is greatly reduced, the pressure of the water flow is reduced, and the secondary noise generated by jet flow is effectively inhibited.
The separating pipe is fixedly arranged in the shell cavity of the shell of the silencer, and the expansion cavity is arranged on the inner pipe side of the separating pipe, so that the silencer forms an expansion structure along a flow channel of the water pipe, sound waves suddenly expand on the section of the pipe to cause acoustic impedance mutation in the channel, the propagation direction of the sound waves is changed, and reflection and interference phenomena occur in the pipe, thereby effectively realizing the silencing of medium and low frequency noise; the separating perforated pipe adopts a pipe wall perforation structure, sound energy is converted into heat energy to be dissipated under the damping action of perforation, noise pulsation is greatly reduced, and the perforation on the expanding perforated pipe generates damping under the action of fluid viscosity, so that high-frequency noise is eliminated.
Because the cavity between the separating pipe and the shell of the silencer is separated into the resonant cavity and the energy storage cavity by the separating rib plate, when sound is transmitted to the intersection of the neck pipe and the water pipe of the resonant cavity in the water pipe, part of sound energy is reflected back due to the abrupt change of acoustic impedance, and part of sound energy is transmitted into the neck pipe and the resonant cavity to consume energy; especially when the frequency of the sound wave is close to or equal to the natural frequency of the resonant cavity, the resonant cavity can excite resonance, absorb and consume a large amount of sound energy, and the resonant cavity has the characteristics of simple structure, high noise elimination amount and small pressure loss; the energy accumulator is adopted to restrain low-frequency pressure pulsation, when the pressure of water flow is higher than the inflation pressure of the energy accumulator, water enters the energy storage cavity through the perforation and absorbs the pulsating part of the water flow which is higher than the average flow; when the water flow pressure is lower than the charging pressure of the energy accumulator, the diaphragm expands, water flow in the cavity flows into the pipeline from the hole of the energy accumulator, and the pulsating part lower than the average flow is supplemented, so that the attenuation of water flow pressure pulsation is realized.
Drawings
The tunable resonant water pipe silencer of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic cross-sectional view of a tunable resonant water pipe muffler according to an embodiment of the present invention.
In the figure, 1-silencer shell, 2-energy storage air bag, 3-energy storage cavity, 4-separation rib plate, 5-fixed water inlet perforated pipe, 6-adjustable water inlet perforated pipe, 7-resonant cavity, 8-resonant neck pipe, 9-throttling ring, 10-fixed water outlet perforated pipe, 11-adjustable water outlet perforated pipe, 12-separation pipe, 13-expansion cavity, 14-sealing element, 15-positioning screw, 16-water outlet pipe flange and 17-water inlet pipe flange.
Detailed Description
As shown in fig. 1, the frequency-adjustable resonant water pipe silencer comprises a silencer casing 1 composed of a circular pipe section and two end plates, wherein the circular pipe section and the end plates are fixedly connected with each other by welding to form a silencer casing shell. The adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11 of the circular pipe structure respectively penetrate through the wall plates at the front end and the rear end of the silencer shell 1 and are supported on the wall plates at the two ends of the silencer shell 1, and the extending ends of the adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11 are respectively and fixedly provided with a water outlet pipe flange 16 and a water inlet pipe flange 17 so as to connect the silencer in series on a water pipeline. The center lines of the adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11 are positioned on the center line of the silencer casing 1.
The adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11 extend into the wall of the extending end in the shell cavity of the silencer shell 1 and are provided with perforations, the perforation apertures of the adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11 are equal, and the perforation apertures are both 10 mm; the perforation rates were all 20%. The adjustable inlet pipe 6 is movably supported on a corresponding support surface of the muffler shell 1, on which a sealing element 14 is arranged; the outlet-adjustable perforated pipe 11 is also mounted movably on a corresponding bearing surface of the muffler shell 1, on which a sealing element 14 is also arranged. The sealing element 14 is two O-ring seals, or two lip-ring seals, or one O-ring seal and one lip-ring seal. And positioning screws 15 are arranged at two ends of the silencer shell 1, the positioning screws 15 are positioned at corresponding positions of the supporting surfaces of the adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11, so that the positioning screws 15 respectively correspond to the adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11, the adjustable water inlet perforated pipe 6 or the adjustable water outlet perforated pipe 11 can be moved in the axial direction by loosening the positioning screws 15, and the adjustable water inlet perforated pipe 6 and the adjustable water outlet perforated pipe 11 can be locked on the silencer shell 1 by locking the positioning screws 15.
A fixed water inlet perforated pipe 5 and a fixed water outlet perforated pipe 10 are fixedly arranged in a shell cavity of the silencer shell 1, and the fixed water inlet perforated pipe 5 and the fixed water outlet perforated pipe 10 are fixedly connected with each other through a throttling ring 9; the fixed water inlet perforated pipe 5, the fixed water outlet perforated pipe 10 and the throttle ring 9 are positioned on the same axis, and the fixed water inlet perforated pipe 5 and the fixed water outlet perforated pipe 10 are respectively and fixedly connected to two sides of the throttle ring 9. The outer diameter of the throttle ring 9 is equal to the outer diameter of the fixed water inlet perforated pipe 5 and the fixed water outlet perforated pipe 10, the inner diameter of the throttle ring 9 is smaller than the inner diameters of the adjustable water inlet perforated pipe 5 and the adjustable water outlet perforated pipe 10, and the cross section of the throttle ring 9 is in an isosceles trapezoid shape. The configuration of the restrictor ring 9 directs fluid from the front section bore into the expansion chamber, while the inclined trapezoidal waist reduces the flow resistance of the fluid.
The fixed water inlet perforated pipe 5 is sleeved on the adjustable water inlet perforated pipe 6, and the fixed water outlet perforated pipe 10 is also sleeved on the adjustable water outlet perforated pipe 11; the relative sleeving position of the adjustable water inlet perforated pipe 6 and the fixed water inlet perforated pipe 5 is adjusted along the axial direction, so that the actual aperture size of the adjustable water inlet perforated pipe 6 and the fixed water inlet perforated pipe 5 can be changed; the relative sleeving position of the adjustable water outlet perforated pipe 11 and the fixed water outlet perforated pipe 10 is adjusted by moving in the axial direction, so that the actual aperture size of the adjustable water outlet perforated pipe 11 and the fixed water outlet perforated pipe 10 can be changed. The perforation apertures of the adjustable water inlet perforated pipe 6 and the fixed water inlet perforated pipe 5 are equal, and the perforation aperture is 10 mm; the perforation rate is 20%; the perforation apertures on the adjustable water outlet perforated pipe 11 and the fixed water outlet perforated pipe 10 are also equal, the perforation aperture is also 10mm, and the perforation rate is 20%.
A separating pipe 12 is fixedly arranged in a shell cavity of the silencer shell, an expansion cavity 13 is arranged on the inner pipe side of the separating pipe 4, the hole diameter of a perforation on the pipe body of the separating pipe 12 is 6mm, and the perforation rate of the separating pipe 12 is 20%. The chamber between the separating pipe 12 and the muffler shell 1 is divided into a resonance chamber 7 and an energy accumulating chamber 3 by the separating ribs 4. Two separating rib plates 4 are arranged in a cavity between the separating pipe 12 and the silencer shell 1, the cavity between the separating pipe 12 and the silencer shell 1 is divided into two energy storage cavities 3 and a resonant cavity 7 by the two separating rib plates 4, and the two energy storage cavities 3 are respectively positioned on two sides of the resonant cavity 7. The pipe body of the separating pipe 12 corresponding to the energy storage cavity 3 is provided with a perforation, the aperture of the perforation is 6mm, and the perforation rate of the separating pipe 12 is 20%. A resonance neck 8 arranged on the throttle ring 9 opens radially into the resonance chamber 7. The energy storage cavity 3 is filled with a plurality of spherical energy storage air bags 2, the energy storage air bags 2 are all rubber inflatable air bags, and the air bags are filled with nitrogen and have different gas pressures so as to absorb and stabilize the pulsation noise with different frequencies and amplitudes.
Claims (10)
1. A tunable resonant water pipe muffler comprising a muffler shell (1), characterized in that: the two end walls of the silencer shell (1) are supported with an adjustable water inlet perforated pipe (6) and an adjustable water outlet perforated pipe (11) which can move axially; a fixed water inlet perforated pipe (5) and a fixed water outlet perforated pipe (10) are fixedly arranged in a shell cavity of the silencer shell (1), the fixed water inlet perforated pipe (5) and the fixed water outlet perforated pipe (10) are fixedly connected with each other through a throttling ring (9), the fixed water inlet perforated pipe (5) is sleeved on the adjustable water inlet perforated pipe (6), and the fixed water outlet perforated pipe (10) is sleeved on the adjustable water outlet perforated pipe (11); the muffler is characterized in that a separating pipe (12) is fixedly arranged in a shell cavity of the muffler shell (1), a cavity between the separating pipe (12) and the muffler shell (1) is divided into a resonant cavity (7) and an energy storage cavity (3) by a separating rib plate (4), a through hole is formed in a pipe body of the separating pipe (12) corresponding to the energy storage cavity (3), an energy storage air bag (2) is filled in the energy storage cavity (3), an expansion cavity (13) is arranged on the inner pipe side of the separating pipe (4), and a resonant neck pipe (8) arranged on the throttle ring (9) is communicated with the resonant cavity (7) along the radial direction.
2. The frequency tunable resonant water line muffler of claim 1, wherein: the central lines of the adjustable water inlet perforated pipe (6) and the adjustable water outlet perforated pipe (11) are positioned on the central line of the silencer shell (1).
3. The frequency tunable resonant water line muffler of claim 1, wherein: the two separating rib plates (4) divide a cavity between the separating pipe (12) and the silencer shell (1) into two energy storage cavities (3) and a resonant cavity (7), and the two energy storage cavities (3) are respectively positioned on two sides of the resonant cavity (7).
4. The frequency tunable resonant water line muffler of claim 1, wherein: a sealing element (14) is arranged on the supporting surface of the adjustable water inlet perforated pipe (6) corresponding to the silencer shell (1); and a sealing element (14) is also arranged on the supporting surface of the adjustable water outlet perforated pipe (11) corresponding to the silencer shell (1).
5. The frequency tunable resonant water line muffler of claim 4, wherein: the sealing element (14) is an O-shaped sealing ring or/and a lip-shaped sealing ring.
6. The frequency tunable resonant water line muffler of claim 1, wherein: and two ends of the silencer shell (1) are respectively provided with a positioning screw (15), and the positioning screws (15) respectively correspond to the adjustable water inlet perforated pipe (6) and the adjustable water outlet perforated pipe (11).
7. The frequency tunable resonant water line muffler of claim 1, wherein: the outer diameter of the throttling ring (9) is equal to the outer diameters of the fixed water inlet perforated pipe (5) and the fixed water outlet perforated pipe (10), and the inner diameter of the throttling ring (7) is smaller than the inner diameters of the adjustable water inlet perforated pipe (6) and the adjustable water outlet perforated pipe (11).
8. The frequency tunable resonant water line muffler of claim 7, wherein: the cross section of the throttle ring (9) is isosceles trapezoid.
9. The frequency tunable resonant water line muffler of claim 1, wherein: the perforation apertures on the adjustable water inlet perforated pipe (6) and the fixed water inlet perforated pipe (5) are equal, the perforation aperture is 10mm, and the perforation rate is 20%; the perforation apertures on the adjustable water outlet perforated pipe (11) and the fixed water outlet perforated pipe (10) are equal, the perforation aperture is 10mm, and the perforation rate is 20%.
10. The frequency tunable resonant water line muffler of claim 1, wherein: the aperture of the perforation on the pipe body of the separating pipe (12) is 6mm, and the perforation rate of the separating pipe (12) is 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910953382.2A CN112648463A (en) | 2019-10-09 | 2019-10-09 | Frequency-adjustable resonance type water pipeline silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910953382.2A CN112648463A (en) | 2019-10-09 | 2019-10-09 | Frequency-adjustable resonance type water pipeline silencer |
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| Publication Number | Publication Date |
|---|---|
| CN112648463A true CN112648463A (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910953382.2A Pending CN112648463A (en) | 2019-10-09 | 2019-10-09 | Frequency-adjustable resonance type water pipeline silencer |
Country Status (1)
| Country | Link |
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| CN (1) | CN112648463A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110291A (en) * | 2021-11-24 | 2022-03-01 | 江苏科技大学 | Elastic plate type straight-through perforated pipe water muffler with static pressure balance cavity and assembling method |
| CN114704703A (en) * | 2022-03-15 | 2022-07-05 | 中国船舶重工集团公司第七一一研究所 | Water pipeline silencing device, silencing method and ship |
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| DE102005000968A1 (en) * | 2005-01-07 | 2006-07-20 | Volkswagen Ag | Absorption muffler for exhaust equipment, has damping pipe enclosed by casing, where pipe and casing are rotatable and/or adjustable against each other along longitudinal axis of pipe |
| CN103062569A (en) * | 2013-01-10 | 2013-04-24 | 哈尔滨工程大学 | Pressure-auto-balance hydrodynamic noise silencer |
| CN203927230U (en) * | 2014-06-16 | 2014-11-05 | 江苏业安环保设备科技有限公司 | Low flow resistance wide band combined-type water pipeline silencing apparatus |
| CN108643988A (en) * | 2018-03-25 | 2018-10-12 | 哈尔滨工程大学 | A kind of variable purifying muffler |
| CN110056737A (en) * | 2019-05-29 | 2019-07-26 | 青岛科技大学 | A kind of honeycomb rubber lining formula pressure fluctuation attenuator |
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2019
- 2019-10-09 CN CN201910953382.2A patent/CN112648463A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005000968A1 (en) * | 2005-01-07 | 2006-07-20 | Volkswagen Ag | Absorption muffler for exhaust equipment, has damping pipe enclosed by casing, where pipe and casing are rotatable and/or adjustable against each other along longitudinal axis of pipe |
| CN103062569A (en) * | 2013-01-10 | 2013-04-24 | 哈尔滨工程大学 | Pressure-auto-balance hydrodynamic noise silencer |
| CN203927230U (en) * | 2014-06-16 | 2014-11-05 | 江苏业安环保设备科技有限公司 | Low flow resistance wide band combined-type water pipeline silencing apparatus |
| CN108643988A (en) * | 2018-03-25 | 2018-10-12 | 哈尔滨工程大学 | A kind of variable purifying muffler |
| CN110056737A (en) * | 2019-05-29 | 2019-07-26 | 青岛科技大学 | A kind of honeycomb rubber lining formula pressure fluctuation attenuator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110291A (en) * | 2021-11-24 | 2022-03-01 | 江苏科技大学 | Elastic plate type straight-through perforated pipe water muffler with static pressure balance cavity and assembling method |
| CN114110291B (en) * | 2021-11-24 | 2023-09-19 | 江苏科技大学 | Elastic plate type straight-through perforated pipe water muffler with static pressure balance cavity and assembly method |
| CN114704703A (en) * | 2022-03-15 | 2022-07-05 | 中国船舶重工集团公司第七一一研究所 | Water pipeline silencing device, silencing method and ship |
| CN114704703B (en) * | 2022-03-15 | 2023-10-13 | 中国船舶集团有限公司第七一一研究所 | Water pipeline silencing device, silencing method and ship |
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