CN110848116A - Vibration and noise reduction device for air energy heat pump - Google Patents
Vibration and noise reduction device for air energy heat pump Download PDFInfo
- Publication number
- CN110848116A CN110848116A CN201911014601.7A CN201911014601A CN110848116A CN 110848116 A CN110848116 A CN 110848116A CN 201911014601 A CN201911014601 A CN 201911014601A CN 110848116 A CN110848116 A CN 110848116A
- Authority
- CN
- China
- Prior art keywords
- vibration
- noise reduction
- black hole
- compressor
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0083—Pulsation and noise damping means using blow off silencers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0044—Pulsation and noise damping means with vibration damping supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/005—Pulsation and noise damping means with direct action on the fluid flow using absorptive materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0088—Pulsation and noise damping means using mechanical tuned resonators
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Fluid Mechanics (AREA)
- Compressor (AREA)
Abstract
The invention discloses a vibration and noise reduction device for an air energy heat pump, which comprises a compressor, a passive vibration and noise reduction mechanism and an acoustic black hole noise reduction mechanism, wherein the passive vibration and noise reduction mechanism and the acoustic black hole noise reduction mechanism are arranged around the compressor; the acoustic black hole noise reduction mechanism is arranged on the sound absorption cotton around the compressor. The invention achieves the purposes of energy absorption or vibration and noise reduction by combining passive vibration and noise reduction and acoustic black hole noise reduction; and then realized full frequency band and fallen making an uproar, compensatied and utilized traditional acoustics black hole to carry out the damping and fall making an uproar, the limitation that the low frequency is difficult to realize makes the damping noise reduction effect better.
Description
Technical Field
The invention relates to a vibration and noise reduction device, in particular to a vibration and noise reduction device for an air energy heat pump.
Background
The air energy heat pump works through medium heat exchange, the life of people is more convenient due to the generation of the air energy heat pump, time is saved due to the function of the air energy heat pump, a user is helped to better perform life and work at the same time, but the traditional air energy heat pump is extremely high in noise, and particularly the noise generated when a compressor operates reaches 80 decibels, so that inconvenience is brought to the user.
Noise in acoustic media such as air and water is caused by the elastic wave propagation effect in the structure and the mutual coupling action of the structure elastic wave and the surrounding acoustic media (structure sound) on the one hand, and the mutual interaction of sound waves of a sound field (air sound) on the other hand; therefore, the noise in the sound medium is controlled from the two directions, namely the elastic wave behavior in the structure and the sound wave in the air are controlled, so that the vibration and noise reduction of the sound space are realized; wave manipulation methods can be divided into two categories: active and passive methods; the active method generally needs to provide energy from the outside, the system is complex to realize, and has a certain distance from the practicability, so the passive method is generally used in the current engineering structure; damping materials are mostly adopted in the existing passive method, and sound absorption materials attenuate bending waves and sound waves, but with the development of science and technology and society, the requirements of people on the comfort, reliability, safety and durability of equipment are higher and higher, so that the existing passive method cannot meet the design requirements; more necessary to develop new theory, new method and new technology of vibration reduction and noise reduction of the structure; the proposal of the acoustic black hole concept opens up a brand-new chapter for the research of artificial control of wave propagation in the elastic medium and the structure and also provides a new opportunity for the theory and technical breakthrough of vibration and noise reduction of the structure.
Disclosure of Invention
The invention aims to: the vibration-damping and noise-reducing device for the air energy heat pump achieves the purposes of energy absorption or vibration damping and noise reduction by combining passive vibration-damping and noise reduction with acoustic black hole noise reduction.
The technical scheme adopted by the invention is as follows: a vibration and noise reduction device for an air energy heat pump comprises a compressor, a passive vibration and noise reduction mechanism and an acoustic black hole noise reduction mechanism, wherein the passive vibration and noise reduction mechanism and the acoustic black hole noise reduction mechanism are installed around the compressor and comprise a layer of vibration reduction element, a transition plate, two layers of vibration reduction elements, a base and sound absorption cotton; the acoustic black hole noise reduction mechanism is arranged on the sound absorption cotton around the compressor.
The working principle of the invention is as follows: 3 layers of vibration damping elements are arranged on three feet at the lower part of the compressor to support the compressor so as to reduce and eliminate the vibration force transmitted to the base by the compressor; the first layer of vibration reduction elements are upper layer vibration isolators, have a combined compression and shearing bearing mode and good impact resistance, and the compressor is arranged on the transition plate through the plurality of upper layer vibration isolators; the transition plate is connected to a layer of damping elements from below; the two-layer vibration reduction element is connected to the transition plate from the lower part, and specifically, 5 lower-layer vibration isolators serving as the two-layer vibration reduction element are arranged below the transition plate; the base is fixedly connected with the ground and the two-layer vibration damping element is mounted on the base, so that a double-layer vibration isolation structure for isolating vibration of the compressor is formed; the sound absorption cotton is vertically and fully arranged around the base to play a sound absorption role, and in order to better absorb sound and reduce noise, the inner wall of the sound absorption cotton is pasted with an acoustic black hole noise reduction mechanism in a matrix arrangement or a delta arrangement or a free arrangement;
for a typical closed space, the fluctuation energy of the sound absorption cotton can be transferred to the acoustic black hole noise reduction mechanism through the connecting ring; the acoustic black hole noise reduction mechanism is based on that the transmitted bending wave in a solid medium is reduced along with the structure thickness according to a certain power function, and the corresponding phase velocity and group velocity are also reduced, so that the broadband bending wave is gathered in an area with the thinned structure thickness on a certain spatial scale, the wave transmission velocity of certain frequency is unchanged and the wavelength is not changed in an inlet area of the acoustic black hole noise reduction mechanism; in the acoustic black hole area, the wave propagation speed is reduced along with the reduction of the power exponent of the thickness, the wavelength is reduced, and the vibration amplitude is increased; most of bending wave energy is consumed by combining the annular damping gasket, so that the purposes of high-efficiency energy absorption or vibration reduction and noise reduction are achieved; the acoustic black hole noise reduction mechanism adopts an epitaxial acoustic structure, the weak wave speed of the structure is at the outermost end of the structure, the outer end is less constrained by the structure, the deformation is easier, and the acoustic black hole effect is easier to occur; on the other hand, for low-frequency wave energy, the low-frequency modal density of sound-absorbing cotton in a typical closed space is very low, vibration radiation noise is mainly distributed at a few discrete frequencies, a single acoustic black hole noise reduction mechanism combines the characteristics of a Helmholtz resonance silencer, and when a plurality of acoustic black hole noise reduction mechanisms are used simultaneously, the noise reduction of a plurality of frequencies can be realized through optimized design, so that the design based on the two mechanisms can realize full-frequency-band noise reduction.
Further, the first layer of vibration reduction element is a vibration isolator or a vibration absorber, the second layer of vibration reduction element is a vibration isolator or a rigid cushion block or a vibration absorber, and one or two layers of vibration reduction elements can be freely selected according to design requirements.
Furthermore, the bottom of the compressor is provided with three lug buckles, and 3 damping elements are arranged on one layer and are respectively connected with three lug bolts of the three lug buckles; the installation is more stable and rapid.
Further, the two layers of vibration reduction element bolts are arranged between the transition plate and the base, and a double-layer vibration isolation structure for vibration isolation of the compressor is formed.
Furthermore, the acoustic black hole noise reduction mechanism is of a disc-shaped structure, the distance between the upper surface and the lower surface of the disc-shaped structure gradually decreases from the central axis of the disc-shaped structure to the outer edge of the disc-shaped structure, the disc-shaped structure comprises a black hole area, the distance between the upper surface and the lower surface of the black hole area changes in a power exponent form from the central axis to the outer edge direction, the upper surface of the disc-shaped structure is provided with a disc convex edge, the inner wall of the lower surface is provided with a connecting ring, the connecting ring is connected with the resonant cavity, the top of the resonant cavity is provided with a through hole, the bottom of the connecting ring is provided with a magic tape, and the connecting ring is made of; and the full-frequency-band noise reduction is realized.
Furthermore, the acoustic black hole noise reduction mechanism and the sound absorption cotton are arranged in a matrix or in a delta shape or in a free arrangement through magic tapes; and (4) freely arranging according to design requirements and cost budget.
Furthermore, the acoustic black hole noise reduction mechanism also comprises an annular damping gasket, the outer diameter of the annular damping gasket is the same as the outer diameter of the disc-shaped structure, and the annular damping gasket is adhered to the lower surface of the disc-shaped structure; the circular damping gasket consumes most of the bending wave energy, so that the purposes of high-efficiency energy absorption or vibration reduction and noise reduction are achieved.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention not only arranges two layers of vibration reduction elements at the bottom of the compressor, installs sound absorption cotton around the compressor to enable the compressor to obtain initial noise reduction, but also installs a plurality of acoustic black hole noise reduction mechanisms on the sound absorption cotton in a matrix manner, and the acoustic black hole noise reduction mechanisms carry out broadband vibration reduction and noise reduction on the controlled structure by utilizing the ABH effect and the dynamic vibration absorption characteristic without weakening the thickness of the controlled structure, thereby avoiding the local high dynamic response and the reduction of the structural strength of the controlled structure; simultaneously through set up resonant cavity and through-hole on disc structure, make resonant cavity and through-hole form the sound resonant cavity, carry out effective control to the low frequency sound wave, and then realized full frequency band and fallen making an uproar, remedy and utilized traditional acoustics black hole to carry out the damping and fall the noise, the low frequency is difficult to the limitation of realizing, makes the damping effect of making an uproar better.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is a schematic view of the installation of the acoustic black hole noise reduction mechanism on the sound absorption cotton;
FIG. 4 is a schematic structural diagram of an acoustic black hole noise reduction mechanism;
labeled as: 1-compressor, 2-three-lug buckle, 3-one layer of vibration reduction element, 4-transition plate, 5-two layers of vibration reduction element, 6-base, 7-sound absorption cotton, 8-acoustic black hole noise reduction mechanism, 81-disc convex edge, 82-black hole area, 83-connecting ring, 84-magic tape, 85-circular damping gasket, 86-through hole and 87-resonant cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in fig. 1-4, a vibration-damping and noise-reducing device for an air energy heat pump includes a compressor 1, a passive vibration-damping and noise-reducing mechanism and an acoustic black hole noise-reducing mechanism 8 installed around the compressor 1, wherein the passive vibration-damping and noise-reducing mechanism includes a first layer of vibration-damping element 3, a transition plate 4, a second layer of vibration-damping element 5, a base 6 and sound-absorbing cotton 7, the sound-absorbing cotton 7 is vertically arranged around the base 6, the upper part of the base 6 is provided with a plurality of second layers of vibration-damping elements 5, the transition plate 4 is installed on the second layer of vibration-damping elements 5, the transition plate 4 is installed with a plurality of first layers of vibration-damping elements 3, and the first layer; the acoustic black hole noise reduction mechanism 8 is mounted on the sound absorption cotton 7 around the compressor 1.
The working principle of the invention is as follows: 3 vibration reduction elements 3 are arranged on three footings at the lower part of the compressor 1 to support the compressor 1 so as to reduce and eliminate the vibration force transmitted from the compressor 1 to the base 6; the first layer of vibration reduction elements 3 are upper layer vibration isolators, have a combined compression and shearing bearing mode and good impact resistance, and the compressor 1 is arranged on the transition plate 4 through the plurality of upper layer vibration isolators; the transition plate 4 is connected to a layer of damping elements 3 from below; the second-layer damping elements 5 are connected to the transition plate 4 from below, and specifically, 5 lower-layer vibration isolators serving as the second-layer damping elements 5 are installed below the transition plate 4; the base 6 is fixedly connected with the ground and the two-layer vibration damping element 5 is mounted on the base 6, thereby forming a double-layer vibration isolation structure for vibration isolation of the compressor 1; the sound absorption cotton 7 is vertically and fully arranged around the base 6 in a surrounding way, so that the sound absorption effect is achieved, and in order to better absorb sound and reduce noise, acoustic black hole noise reduction mechanisms 8 are stuck on the inner wall of the sound absorption cotton 7 in a matrix arrangement or a delta arrangement or a free arrangement;
for a typical closed space, the fluctuation energy of the sound absorption cotton 7 can be transferred to the acoustic black hole noise reduction mechanism 8 through the connection ring 83; the acoustic black hole noise reduction mechanism 8 is based on that the transmitted bending wave in a solid medium is reduced according to a certain power function along with the structure thickness, and the corresponding phase velocity and group velocity are also reduced, so that the broadband bending wave is gathered in an area with the thinned structure thickness on a certain spatial scale, the wave transmission velocity of certain frequency is unchanged and the wavelength is not changed in an inlet area of the acoustic black hole noise reduction mechanism 8; in the acoustic black hole region 82, the propagation velocity of the wave decreases as the power exponent of the thickness decreases, the wavelength decreases, and the vibration amplitude increases; most of bending wave energy is consumed by combining the annular damping gasket 85, so that the purposes of high-efficiency energy absorption or vibration reduction and noise reduction are achieved; the acoustic black hole noise reduction mechanism 8 adopts an epitaxial acoustic structure, the weak wave speed of the structure is at the outermost end of the structure, the outer end is less constrained by the structure, the deformation is easier, and the acoustic black hole effect is easier to occur; on the other hand, for low-frequency wave energy, the low-frequency modal density of the sound-absorbing cotton 7 in a typical closed space is usually very small, vibration radiation noise is mainly distributed at a few discrete frequencies, the single acoustic black hole noise reduction mechanism 8 combines the characteristics of a Helmholtz resonance silencer, and when the plurality of acoustic black hole noise reduction mechanisms 8 are used simultaneously, the noise reduction of a plurality of frequencies can be realized simultaneously through optimized design, so that the design based on the two mechanisms can realize the full-frequency-band noise reduction.
Example 2
On the basis of embodiment 1, the first-layer damping element 3 is a vibration isolator or a vibration damper, and the second-layer damping element 5 is a vibration isolator or a rigid cushion block or a vibration damper, and the first-layer damping element 5 and the second-layer damping element 5 can be freely selected according to design requirements.
Example 3
On the basis of the embodiment 2, the bottom of the compressor 1 is provided with three lug buckles 2, and 3 damping elements 3 are arranged and respectively connected with three lug bolts of the three lug buckles 2; the installation is more stable and rapid.
Example 4
On the basis of embodiment 3, the two-layer vibration damping element 5 is bolted between the transition plate 4 and the base 6, and a double-layer vibration isolation structure for vibration isolation of the compressor 1 is formed.
Example 5
On the basis of embodiment 4, the acoustic black hole noise reduction mechanism 8 is a disc-shaped structure, the distance between the upper surface and the lower surface of the disc-shaped structure gradually decreases from the central axis of the disc-shaped structure to the outer edge, the disc-shaped structure includes a black hole region 82, the distance between the upper surface and the lower surface of the black hole region 82 changes in a power exponent form from the central axis to the outer edge, the upper surface of the disc-shaped structure is provided with a disc convex edge 81, the inner wall of the lower surface is provided with a connection ring 83, the connection ring 83 is connected with a resonance cavity 87, the top of the resonance cavity 87 is provided with a through hole 86, the bottom of the connection ring 83 is provided with a magic tape 84, and the connection ring 83 is made of a vibration absorption and; the full-band noise reduction is realized; the resonant cavity 87 is a cylindrical cavity.
Example 6
On the basis of the embodiment 5, the acoustic black hole noise reduction mechanism 8 and the sound absorption cotton 7 are arranged in a matrix or in a delta shape or in a free arrangement through the magic tape 84; and (4) freely arranging according to design requirements and cost budget.
Example 7
On the basis of embodiment 5, the acoustic black hole noise reduction mechanism 8 further includes an annular damping shim 85, an outer diameter of the annular damping shim 85 is the same as an outer diameter of the disc-shaped structure, and the annular damping shim 85 is adhered to the lower surface of the disc-shaped structure; the annular damping shim 85 consumes most of the bending wave energy, thereby achieving the purpose of high-efficiency energy absorption or vibration and noise reduction.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (7)
1. A vibration and noise reduction device for an air energy heat pump comprises a compressor (1), and a passive vibration and noise reduction mechanism and an acoustic black hole noise reduction mechanism (8) which are arranged around the compressor (1), and is characterized in that the passive vibration and noise reduction mechanism comprises a layer of vibration reduction element (3), a transition plate (4), two layers of vibration reduction elements (5), a base (6) and sound absorption cotton (7), the sound absorption cotton (7) is vertically arranged around the base (6), the upper part of the base is provided with a plurality of two layers of vibration reduction elements (5), the transition plate (4) is arranged on the two layers of vibration reduction elements (5), the plurality of layers of vibration reduction elements (3) are arranged on the transition plate (4), and the layer of vibration reduction elements (3) are connected to the compressor (1) from the lower part; the acoustic black hole noise reduction mechanism (8) is arranged on the sound absorption cotton (7) around the compressor (1).
2. The vibration/noise reduction device for an air-powered heat pump according to claim 1, wherein the first layer of vibration-damping elements (3) are vibration isolators or vibration dampers, and the second layer of vibration-damping elements (5) are vibration isolators or rigid spacers or vibration dampers.
3. A vibration and noise reduction device for an air-energy heat pump according to claim 2, characterized in that the bottom of the compressor (1) is provided with three-ear buckles (2), and one layer of vibration reduction elements (3) is provided with 3, which are respectively connected with three-ear bolts of the three-ear buckles (2).
4. A vibration and noise reducing arrangement for an air-powered heat pump according to claim 3, characterized in that the two-layer vibration reducing element (5) is bolted between the transition plate (4) and the base (6).
5. A vibration and noise reducing apparatus for an air-powered heat pump according to claim 4, the acoustic black hole noise reduction mechanism (8) is of a disc-shaped structure, the distance between the upper surface and the lower surface of the disc-shaped structure gradually decreases from the central axis of the disc-shaped structure to the outer edge, the disc-shaped structure comprises a black hole area (82), the distance between the upper surface and the lower surface of the black hole area (82) changes in a power exponent form from the central axis to the direction of the outer edge, the upper surface of the disc-shaped structure is provided with a disc convex edge (81), the inner wall of the lower surface is provided with a connecting ring (83), the connecting ring (83) is connected with a resonant cavity (87), the top of the resonant cavity (87) is provided with a through hole (86), the bottom of the connecting ring (83) is provided with a magic tape (84), and the connecting ring (83) is made of a vibration absorption and sound absorption material.
6. The vibration damping and noise reducing device for the air energy heat pump according to claim 5, wherein the acoustic black hole noise reducing mechanism (8) and the sound absorbing cotton (7) are arranged in a matrix or in a delta arrangement or in a free arrangement through magic tapes (84).
7. A vibration and noise reduction device for an air-energy heat pump according to claim 5, wherein the acoustic black hole noise reduction mechanism (8) further comprises an annular damping shim (85), the outer diameter of the annular damping shim (85) is the same as the outer diameter of the disc-shaped structure, and the annular damping shim (85) is adhered to the lower surface of the disc-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014601.7A CN110848116A (en) | 2019-10-24 | 2019-10-24 | Vibration and noise reduction device for air energy heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014601.7A CN110848116A (en) | 2019-10-24 | 2019-10-24 | Vibration and noise reduction device for air energy heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110848116A true CN110848116A (en) | 2020-02-28 |
Family
ID=69596803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911014601.7A Pending CN110848116A (en) | 2019-10-24 | 2019-10-24 | Vibration and noise reduction device for air energy heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110848116A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112478119A (en) * | 2020-11-27 | 2021-03-12 | 江苏科技大学 | Composite vibration reduction support frame based on acoustic black hole and design method thereof |
| CN113182922A (en) * | 2021-04-27 | 2021-07-30 | 四川大学 | Three-degree-of-freedom low-frequency vibration absorption device of main shaft |
| CN115214733A (en) * | 2022-06-21 | 2022-10-21 | 中车长春轨道客车股份有限公司 | Broadband rail train air conditioner air duct vibration and noise reduction device |
| EP4102071A1 (en) | 2021-06-08 | 2022-12-14 | Grundfos Holding A/S | A fluid flow regulation assembly with vibration attenuation |
-
2019
- 2019-10-24 CN CN201911014601.7A patent/CN110848116A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112478119A (en) * | 2020-11-27 | 2021-03-12 | 江苏科技大学 | Composite vibration reduction support frame based on acoustic black hole and design method thereof |
| CN113182922A (en) * | 2021-04-27 | 2021-07-30 | 四川大学 | Three-degree-of-freedom low-frequency vibration absorption device of main shaft |
| EP4102071A1 (en) | 2021-06-08 | 2022-12-14 | Grundfos Holding A/S | A fluid flow regulation assembly with vibration attenuation |
| CN115214733A (en) * | 2022-06-21 | 2022-10-21 | 中车长春轨道客车股份有限公司 | Broadband rail train air conditioner air duct vibration and noise reduction device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110848116A (en) | Vibration and noise reduction device for air energy heat pump | |
| CN108133700B (en) | Acoustic black hole vibration and noise reduction device | |
| CN108717850B (en) | Double-layer plate cavity vibration and noise reduction structure | |
| CN210714982U (en) | Vibration and noise reduction device for air energy heat pump | |
| US20030062217A1 (en) | Acoustic attenuation materials | |
| CN111862921A (en) | Additional eccentric acoustic black hole vibration reduction structure | |
| CN201562523U (en) | Reactor protecting shell | |
| CN207314568U (en) | A kind of efficiently middle low frequency absorption mechanism of substation | |
| CN108951916A (en) | Double-layer combined energy-dissipation structure | |
| CN205487329U (en) | Pad pasting of making an uproar falls | |
| Bécot et al. | Noise control strategies using composite porous materials–Simulations and experimental validations on plate/cavity systems | |
| CN201576547U (en) | Noise-reducing structure of power transformer | |
| CN113799449B (en) | Composite damping plate for medium-low frequency noise reduction switching | |
| CN113978678A (en) | Floating raft vibration isolation device integrating particle damping and design method thereof | |
| EP3928311B1 (en) | Acoustic attenuation device for propagated sound through surfaces | |
| CN208309873U (en) | A kind of energy dissipation brace structure of friction energy-dissipating formula | |
| CN208296117U (en) | Blimp and outdoor unit for compressor | |
| CN114495881A (en) | Nonlinear structural unit and low-frequency broadband noise reduction metamaterial structure | |
| CN116543732A (en) | Additional acoustic black hole combined structure | |
| Hu et al. | Liquid-solid synergistic mechanism sound absorption for underwater anechoic coating | |
| CN211525416U (en) | Combined silencing box damping system | |
| CN110853609B (en) | Underwater acoustic covering layer based on coupling resonance of multilayer scatterers and cavity | |
| CN217880838U (en) | Inhale sound insulation structure based on helmholtz resonance and particle crystal coupling | |
| CN212028878U (en) | Device for silencing pipeline | |
| CN216519373U (en) | Low-noise box body structure of power equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |