CN116538046A - Intelligent silencing and noise reducing high-pressure water pump and implementation method thereof - Google Patents
Intelligent silencing and noise reducing high-pressure water pump and implementation method thereof Download PDFInfo
- Publication number
- CN116538046A CN116538046A CN202310708140.3A CN202310708140A CN116538046A CN 116538046 A CN116538046 A CN 116538046A CN 202310708140 A CN202310708140 A CN 202310708140A CN 116538046 A CN116538046 A CN 116538046A
- Authority
- CN
- China
- Prior art keywords
- noise
- silencing
- pressure water
- water pump
- sound
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 230000030279 gene silencing Effects 0.000 title claims abstract description 88
- 230000001603 reducing effect Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000009467 reduction Effects 0.000 claims abstract description 58
- 230000000694 effects Effects 0.000 claims abstract description 28
- 108010076504 Protein Sorting Signals Proteins 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 230000002441 reversible effect Effects 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000013016 damping Methods 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 17
- 230000003044 adaptive effect Effects 0.000 claims description 15
- 230000002829 reductive effect Effects 0.000 claims description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 7
- 238000012549 training Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims 2
- 206010063385 Intellectualisation Diseases 0.000 abstract description 4
- 229920000742 Cotton Polymers 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000001743 silencing effect Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- 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
- F04B51/00—Testing machines, pumps, or pumping installations
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Abstract
The invention discloses an intelligent silencing and noise reducing high-pressure water pump and an implementation method thereof, and belongs to the technical field of noise reduction of high-pressure water pumps. It comprises the following steps: the motor main part, motor main part and high-pressure water pump are installed in the backup pad, and backup pad bottom is connected with damper and bottom plate, cup joints the amortization cover on the bottom plate, and the amortization cover inner wall is equipped with the sound wave and surveys and fall the appearance of making an uproar, and the sound wave detector is connected with appearance and control system of making an uproar that falls. The invention solves the problem of insufficient noise reduction effect of the existing high-pressure water pump, and the noise is detected by the sound wave detector and processed with the noise model to obtain waveform data; updating and adjusting a weighting coefficient through a self-adaptive filtering algorithm, and controlling a noise reducer to output a signal sequence of reverse interference acoustic waveforms, so that noise of a motor main body and the high-pressure water pump is counteracted; the rubber layer is additionally arranged in the auxiliary pipeline to weaken water flow impact sound, and the water flow is reflected and consumed back and forth through the silencing hole and the silencing cavity to achieve silencing, so that the intellectualization and the noise reduction effect of silencing are improved.
Description
Technical Field
The invention relates to the technical field of noise reduction of high-pressure water pumps, in particular to an intelligent noise reduction high-pressure water pump and an implementation method thereof.
Background
Noise elimination and reduction are devices which can pass through air flow and effectively reduce noise, and are commonly used for reducing noise transmitted through inlets and outlets of various pneumatic equipment or along pipelines, and different noise reduction principles are adopted for different silencers; common noise reduction techniques include resistive noise reduction, resistive composite noise reduction, resonant noise reduction, loss noise reduction, and diffuse noise reduction.
The application number is CN217055573U, which discloses a high-pressure pump with a noise reduction function, wherein the noise generated by the operation of a pump body is absorbed through honeycomb sound absorbing cotton in a noise reduction assembly, so that the noise reduction function of the high-pressure pump is realized; however, in the existing use process, the following two disadvantages still exist:
1. in the prior art, after the honeycomb sound-absorbing cotton is used for a certain time, the shape and the thickness of the honeycomb sound-absorbing cotton can be reduced and thinned, so that the sound-absorbing effect is weakened, and the noise-reducing effect of the high-pressure pump is influenced;
2. in the prior art, because honeycomb sound-absorbing cotton is singly arranged outside the pump body, noise reduction treatment can only be singly carried out on the pump body, and noise reduction treatment cannot be realized on a pipeline connected with the pump body, so that the sound-absorbing and noise-reducing effect of the conventional high-pressure pump is reduced.
Therefore, the existing requirements are not met, and an intelligent silencing and noise reducing high-pressure water pump and an implementation method thereof are provided.
Disclosure of Invention
The invention aims to provide an intelligent silencing and noise reducing high-pressure water pump and an implementation method thereof, wherein the sound wave detector is used for detecting noise and processing the noise with a noise model to obtain waveform data; updating and adjusting a weighting coefficient through a self-adaptive filtering algorithm, and controlling a noise reducer to output a signal sequence of reverse interference acoustic waveforms, so that noise of a motor main body and the high-pressure water pump is counteracted; the rubber layer is additionally arranged in the auxiliary pipeline to weaken water flow impact sound, and the water flow is reciprocally reflected and consumed through the silencing hole and the silencing cavity to achieve silencing, so that the intellectualization and the noise reduction effect are improved, and the problems in the background art are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: an intelligent noise reduction high pressure water pump, comprising: the motor main part, one side of motor main part is connected with high-pressure water pump, and motor main part passes through screw demountable installation in the backup pad with high-pressure water pump, and the bottom of backup pad is connected with damper, and damper's bottom is provided with the bottom plate, and the slip has cup jointed the amortization cover on the bottom plate, evenly distributed is provided with four sound wave detectors on the inner wall of amortization cover one end, and parallel arrangement has four appearance of making an uproar that falls on the inner wall of amortization cover one side, and sound wave detector and appearance of making an uproar are connected with control system respectively.
Further, the high-pressure water pump includes trunk line, fixing base, assists pipeline, rubber layer, damping felt, inhales sound sponge and tinfoil, and one side and the motor main part of trunk line are connected, and the middle part of trunk line is provided with the fixing base, and the middle part of trunk line is connected with the opposite side of assisting the pipeline respectively with the trunk line, and the inner wall of assisting the pipeline is provided with the rubber layer, and the outer wall of assisting the pipeline is provided with damping felt, and damping felt's outer wall is provided with inhales sound sponge, and it is provided with the tinfoil to inhale the outer wall of sponge.
Further, the damping component comprises a supporting seat, a fixing plate and spring columns, wherein the fixing plate is arranged at the bottom end of the inside of the supporting seat, six spring columns are uniformly distributed on the fixing plate, and a damper is arranged in each spring column.
Furthermore, sliding grooves are symmetrically formed in two sides of the surface of the bottom plate, and the inner parts of the sliding grooves are convex.
Further, the silencing cover comprises a cover body, sliding seats, slots, baffles, handles and notches, the sliding seats are symmetrically arranged on two sides of the bottom of the cover body, the sliding seats are concave, two slots are symmetrically arranged at one end of the cover body, one baffle is inserted into each slot in a sliding mode, the handles are arranged on the outer sides of the baffles, and the notches are formed in the center of the inner sides of the baffles.
Further, the control system includes:
the noise detection module is used for detecting the noise emitted by the motor main body and the high-pressure water pump in real time based on the sound wave detector so as to determine the position of the noise source and the sound wave, and transmitting the detected noise source to the intelligent cloud platform;
the intelligent cloud platform is used for collecting and storing the audios of various sound sources on line/off line so as to establish an audio library, comparing, identifying and classifying the received noise sources and sound waves, and transmitting the processed noise sources and sound waves to the adaptive filter;
the self-adaptive filter is used for receiving waveform data of noise sources with different frequencies in the processed sound wave and transmitting the waveform data to the silencing processing module connected with the self-adaptive filter;
the silencing processing module is used for controlling the noise reducer to rotate and the position of the noise source to be silenced based on the waveform data of the noise source received by the adaptive filter, and outputting a signal sequence of reverse interference acoustic waveform of the noise source to be silenced so as to counteract noise.
Further, the inner wall of the rubber layer is uniformly provided with flow guiding convex ribs, the inside of each flow guiding convex rib is provided with a silencing cavity, and the surface of the rubber layer is uniformly provided with silencing holes.
Further, the notches are semicircular, a spring tube is arranged on the inner wall of each notch in a surrounding mode, and an arc plate is connected to the outer side of the spring tube.
Furthermore, the intelligent cloud platform is also used for modeling and parameter training of various noise sources in the audio library, generating identification parameters corresponding to various noise sources, classifying various noise sources in a frequency division manner after identification, establishing cancellation factors corresponding to various noise sources with different frequencies, and providing basic noise filtering basis for the silencing processing module.
An intelligent noise reduction realization method of a high-pressure water pump comprises the following steps:
s1, mounting a motor main body and a high-pressure water pump on a supporting plate through screws, wherein a damping component at the bottom of the motor main body can increase damping and buffering performances of the supporting plate so as to weaken vibration noise generated when the motor main body operates;
s2, embedding a sliding seat at the bottom of the silencing cover into a sliding groove on the surface of the bottom plate, pushing the cover body to move to the forefront end of the bottom plate, and correspondingly inserting two baffles into the slots until a notch at the inner side is clamped with an auxiliary pipeline at the front end of the high-pressure water pump;
s3, starting the motor main body to drive the high-pressure water pump to normally operate, detecting noise generated by the motor main body and a main pipeline in the high-pressure water pump during operation through the sound wave detector, and transmitting the detected noise source to the intelligent cloud platform;
s4, comparing, identifying and classifying the received noise sources and sound waves based on a noise model stored in an audio library in the intelligent cloud platform, so as to obtain waveform data of noise sources with different frequencies in the sound waves;
s5, transmitting waveform data of noise sources with different frequencies in the sound wave to an adaptive filter, updating and adjusting a weighting coefficient through an adaptive filtering algorithm by the adaptive filter, and transmitting the weighting coefficient to a silencing processing module;
s6, controlling the noise reducer to output a signal sequence of reverse interference acoustic waveforms at the position of the noise source to be muffled through the muffling processing module, so as to counteract noise emitted by the main pipeline in the motor main body and the high-pressure water pump;
s7, the auxiliary pipeline in the high-pressure water pump passes through the silencing hole on the surface of the rubber layer and the flow guide convex rib and the silencing cavity on the inner wall, so that noise generated by the collision of water flow in the auxiliary pipeline and the inner wall is reduced; the noise generated by the water flow in the auxiliary pipeline is further weakened through the damping felt and the sound absorbing sponge on the outer wall.
Further, the method further comprises:
setting the size of the sound attenuation hole (243) according to waveform data of noise sources with different frequencies in the sound wave, comprising:
extracting waveform data of noise sources with different frequencies in the sound wave;
extracting the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise from the waveform data of the noise sources with different frequencies;
setting the radius of the silencing hole (243) according to the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise;
wherein the radius of the sound attenuation hole (243) is obtained by the following formula
Wherein R is 1 Represents the radius of the sound deadening hole (243); sqrt represents root number operation; k represents a constant (which can be obtained by analog simulation) related to the noise control effect; s is S maxi And S is mini A maximum noise value and a minimum noise value representing the i-th noise; n is the rated layout number of the silencing holes; m represents the number of noise types; ΔS i The noise intensity variation corresponding to the i-th noise is shown.
Further, the method further comprises:
setting the size of a sound attenuation cavity (242) according to waveform data of noise sources with different frequencies in the sound wave, comprising:
extracting waveform data of noise sources with different frequencies in the sound wave;
extracting the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise from the waveform data of the noise sources with different frequencies;
setting the radius of the silencing cavity (242) according to the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise;
wherein the radius and length of the sound eliminating and reducing cavity (242) are obtained by the following formula
Wherein R is 1 Represents the radius of sound deadening hollow (242); sqrt represents root number operation; k represents a constant (which can be obtained by analog simulation) related to the noise control effect; s is S maxi And S is mini A maximum noise value and a minimum noise value representing the i-th noise; x is the rated layout number of the sound attenuation cavities (242); m represents the number of noise types; ΔS i Representing the noise intensity variation corresponding to the ith noise; s is S pi A noise average value representing the i-th noise; lambda represents the average value of the acoustic wave wavelength.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the intelligent cloud platform, the motor main body and the high-pressure water pump are arranged in the silencing cover, the sound wave detector and the noise reducer are arranged on the inner wall of the silencing cover, and the sound wave detector is used for detecting noise generated by the motor main body and the main pipeline of the high-pressure water pump when working and transmitting the noise to the intelligent cloud platform; comparing, identifying and classifying the received noise source and the sound wave based on the noise model in the audio library, thereby obtaining waveform data of noise sources with different frequencies in the sound wave; the self-adaptive filter is used for updating and adjusting the weighting coefficient through the self-adaptive filtering algorithm, and the noise reduction processing module is used for controlling the noise reduction instrument to output a signal sequence of reverse interference acoustic waveforms at the position of the noise source to be subjected to noise reduction, so that noise emitted by the main pipeline of the motor main body and the high-pressure water pump is counteracted, and the intellectualization and the effect of the existing high-pressure water pump noise reduction method are improved.
2. According to the invention, the rubber layer is additionally arranged on the inner wall of the auxiliary pipeline in the high-pressure water pump, so that the collision sound of the water flow in the pipeline striking the inner wall of the auxiliary pipeline is reduced; the inner wall of the rubber layer is provided with the flow guiding convex ribs, so that the flow guiding effect can be achieved on the water flow, the disorder of the water flow is avoided, the friction impact of the water flow on the inner wall of the pipeline is relieved, and the purposes of silencing and noise reduction are achieved; the surface of the rubber layer is provided with a silencing hole, a silencing cavity is arranged in the flow guiding convex rib, most of water flow sound waves can be conducted into the silencing hole through the silencing hole, and a small part of water flow sound waves can be conducted into the silencing cavity through the silencing hole and the silencing cavity to conduct water flow to be reflected and consumed in a reciprocating manner, so that the silencing effect is achieved; secondly, damping felt and sound-absorbing sponge are additionally arranged on the outer wall of the auxiliary pipeline, so that the effects of noise reduction and noise reduction outside the auxiliary pipeline are improved; therefore, after one end of the auxiliary pipeline extends to the outside of the silencing cover, the silencing and noise reducing functions can be achieved, and the silencing and noise reducing effects of the existing high-pressure water pump are further improved.
Drawings
FIG. 1 is a diagram of the whole structure of an intelligent silencing and noise reducing high-pressure water pump;
FIG. 2 is a diagram of the internal structure of the intelligent silencing and noise reducing high-pressure water pump;
FIG. 3 is a partial structure diagram of the intelligent silencing and noise reducing high-pressure water pump;
FIG. 4 is a bottom plate structure diagram of the intelligent silencing and noise reducing high pressure water pump of the invention;
FIG. 5 is a diagram of a damping assembly of the intelligent noise damping and reducing high pressure water pump of the present invention;
FIG. 6 is a cross-sectional view of the inside of the intelligent noise reduction high-pressure water pump of the invention;
FIG. 7 is a diagram of a muffler cover of the intelligent high-pressure water pump with noise reduction;
FIG. 8 is an interior view of a muffler cover of the intelligent high-pressure water pump with noise reduction;
FIG. 9 is a side view of a muffler cover of the intelligent muffler and noise reducing high pressure water pump of the present invention;
FIG. 10 is a diagram of the intelligent silencing and noise reducing control system of the high pressure water pump of the present invention;
FIG. 11 is a flow chart of the intelligent silencing and noise reducing control method of the high-pressure water pump.
In the figure: 1. a motor main body; 2. a high pressure water pump; 21. a main pipe; 22. a fixing seat; 23. an auxiliary pipeline; 24. a rubber layer; 241. a flow guiding convex rib; 242. a sound deadening cavity; 243. a sound deadening hole; 25. damping felt; 26. a sound absorbing sponge; 27. tinfoil; 3. a support plate; 4. a shock absorbing assembly; 41. a support base; 42. a fixing plate; 43. a spring post; 5. a bottom plate; 51. a chute; 6. a sound deadening hood; 61. a cover body; 62. a slide; 63. a slot; 64. a baffle; 65. a handle; 66. a notch; 661. a spring tube; 662. an arc plate; 7. an acoustic wave detector; 8. and (5) a noise reduction instrument.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the problem that the shape and thickness of the existing honeycomb sound-absorbing cotton can be reduced and thinned after the existing honeycomb sound-absorbing cotton is used for a certain time, so that the sound-absorbing effect is weakened; and honeycomb sound-absorbing cotton is singly arranged outside the pump body, so that noise reduction treatment can only be singly carried out on the pump body, and the noise reduction treatment cannot be realized on a pipeline connected with the pump body, so that the technical problem of the sound-absorbing noise-reducing effect of the existing high-pressure water pump 2 is solved, and referring to fig. 1-11, the following technical scheme is provided:
an intelligent noise reduction high pressure water pump, comprising: the motor main part 1, one side of motor main part 1 is connected with high-pressure water pump 2, motor main part 1 passes through screw demountable installation in backup pad 3 with high-pressure water pump 2, the bottom of backup pad 3 is connected with damper 4, damper 4's bottom is provided with bottom plate 5, the slip cover 6 that has cup jointed on the bottom plate 5, evenly distributed is provided with four sound wave detectors 7 on the inner wall of cover 6 one end of amortization, parallel arrangement has four appearance of making an uproar 8 of making an uproar on the inner wall of cover 6 one side of amortization, and sound wave detector 7 is connected with control system with appearance of making an uproar 8 respectively of making an uproar.
Specifically, the motor main body 1 and the high-pressure water pump 2 are arranged on the supporting plate 3, and the damping component 4 is utilized to play a damping and noise reducing function on the supporting plate 3 so as to relieve vibration noise generated when the motor main body 1 runs; the silencing cover 6 is sleeved on the bottom plate 5 in a sliding manner, so that the silencing cover is convenient to assemble and disassemble; meanwhile, the sound wave detector 7 and the noise reducer 8 arranged in the motor main body 1 and the high-pressure water pump 2 can detect noise in real time, and a noise reduction and noise reduction processing method can be timely carried out through a control system.
The high-pressure water pump 2 comprises a main pipeline 21, a fixed seat 22, auxiliary pipelines 23, a rubber layer 24, damping felts 25, sound absorbing sponge 26 and tinfoil 27, wherein one side of the main pipeline 21 is connected with a motor main body 1, the middle part of the main pipeline 21 is provided with the fixed seat 22, the middle part of the main pipeline 21 and the other side of the main pipeline 21 are respectively connected with the auxiliary pipelines 23, the inner wall of the auxiliary pipeline 23 is provided with the rubber layer 24, the inner wall of the rubber layer 24 is uniformly provided with flow guiding convex ribs 241, a sound absorbing cavity 242 is formed in each flow guiding convex rib 241, and sound absorbing holes 243 are uniformly formed in the surface of the rubber layer 24; the outer wall of the auxiliary pipeline 23 is provided with a damping felt 25, the outer wall of the damping felt 25 is provided with a sound absorbing sponge 26, and the outer wall of the sound absorbing sponge 26 is provided with tinfoil 27.
Specifically, a rubber layer 24 is additionally arranged on the inner wall of the auxiliary pipeline 23 in the high-pressure water pump 2 so as to weaken the collision sound of the water flow in the pipeline striking the inner wall of the auxiliary pipeline 23; the inner wall of the rubber layer 24 is provided with the flow guide convex ribs 241, which can play a role in guiding water flow, prevent the water flow from being disordered, and thus reduce friction impact of the water flow on the inner wall of the auxiliary pipeline 23, so as to achieve the purposes of silencing and reducing noise; and the surface of the rubber layer 24 is provided with a silencing hole 243, a silencing cavity 242 is arranged in the flow guiding convex rib 241, most of water flow sound waves can be conducted into the silencing hole 243 through the silencing hole 243, and a small part of water flow sound waves can be conducted into the silencing cavity 242 through the silencing hole 243 and the silencing cavity 242 to be reflected and consumed in a reciprocating manner so as to achieve the silencing effect; secondly, a damping felt 25 and a sound-absorbing sponge 26 are additionally arranged on the outer wall of the auxiliary pipeline 23, so that the effects of noise reduction and noise reduction outside the auxiliary pipeline 23 are improved; thereby ensure that the one end of auxiliary pipe 23 extends to the outside of noise reduction cover 6 after, can reach the function of noise reduction equally, further improve the effect of noise reduction of current high pressure water pump 2.
The damping component 4 comprises a supporting seat 41, a fixing plate 42 and spring columns 43, wherein the fixing plate 42 is arranged at the bottom end of the inside of the supporting seat 41, six spring columns 43 are uniformly distributed on the fixing plate 42, and a damper is arranged in each spring column 43.
Specifically, make fixed plate 42 be connected with backup pad 3 through spring post 43, spring post 43 mutually support with inside attenuator to increase the shock attenuation cushioning performance of backup pad 3, with the vibrations noise that produces when weakening motor main part 1 and running, further improve the effect of making an uproar falls in current high pressure water pump 2 amortization.
The two sides of the surface of the bottom plate 5 are symmetrically provided with sliding grooves 51, and the inside of the sliding grooves 51 is convex.
The silencing cover 6 comprises a cover body 61, a sliding seat 62, slots 63, baffles 64, handles 65 and notches 66, wherein the sliding seat 62 is symmetrically arranged on two sides of the bottom of the cover body 61, the sliding seat 62 is concave, two slots 63 are symmetrically formed in one end of the cover body 61, one baffle 64 is slidably inserted into each slot 63, the handles 65 are arranged on the outer sides of the baffles 64, and the notches 66 are formed in the center of the inner sides of the baffles 64.
Specifically, the sliding seats 62 on two sides of the bottom of the cover 61 are respectively embedded in the sliding grooves 51 on the surface of the bottom plate 5, and the cover 61 is pushed to the front end of the high-pressure water pump 2 until the sliding seats 62 are attached to the front end of the sliding grooves 51; then the baffles 64 on the two sides are sequentially inserted into the slots 63 and approach to the auxiliary pipeline 23 at one end of the high-pressure water pump 2 until the notches 66 in the middle of the baffles 64 on the two sides are attached to the auxiliary pipeline 23, so that one side of the sound-absorbing cover 6 is closed; and the auxiliary pipe 23 of the high-pressure water pump 2 passes through the notch 66, can extend to the outside of the noise reduction cover 6, and is connected with an external pipe.
The control system comprises:
the noise detection module is used for detecting the noise emitted by the motor main body 1 and the high-pressure water pump 2 in real time based on the sound wave detector 7 so as to determine the position of a noise source and the sound wave and transmitting the detected noise source to the intelligent cloud platform; the noise detection module is as follows: the sound wave detector 7 detects the motor main body 1 and the high-pressure water pump 2 in real time through the sound wave detector 7, so that a noise source and sound waves are obtained, and the detected noise source and sound waves are transmitted to the intelligent cloud platform for analysis.
The intelligent cloud platform is used for collecting and storing the audios of various sound sources on line/off line so as to establish an audio library, comparing, identifying and classifying the received noise sources and sound waves, and transmitting the processed noise sources and sound waves to the adaptive filter; the intelligent cloud platform is also used for modeling and parameter training of various noise sources in the audio library, generating identification parameters corresponding to various noise sources, classifying various noise sources in a frequency division manner after identification, establishing counteracting factors corresponding to various noise sources with different frequencies, and providing basic noise filtering basis for the silencing processing module; by means of library building and training of tens of thousands of environmental noise source samples, modeling and parameter training are conducted through an HMM algorithm, and optimal identification parameters are trained and used as noise source reference samples.
The self-adaptive filter is used for receiving waveform data of noise sources with different frequencies in the processed sound wave and transmitting the waveform data to the silencing processing module connected with the self-adaptive filter.
The silencing processing module controls the noise reducer 8 to rotate and the position of the noise source to be silenced based on the waveform data of the noise source received by the adaptive filter, thereby outputting a signal sequence of reverse interference acoustic waveform of the noise source to be silenced for counteracting noise.
Specifically, when noise comes, external noise starts to be received through the acoustic wave probe 7, that is: a main pipeline 21 in the motor main body 1 and the high-pressure water pump 2; comparing, identifying and classifying the received noise sources and sound waves based on a noise model stored in an audio library in the intelligent cloud platform as a sample, thereby obtaining waveform data of noise sources with different frequencies; after the waveform data are reprocessed through the self-adaptive filter, the noise reducer 8 is controlled to output a signal sequence of reverse interference acoustic waveform to the noise source to be muffled, so that noise emitted by the main pipeline 21 in the motor main body 1 and the high-pressure water pump 2 during operation is counteracted, and the intellectualization and the noise reduction effect of the high-pressure water pump 2 are improved.
The notches 66 are semicircular, a spring tube 661 is arranged on the inner wall of each notch 66 in a surrounding mode, and an arc plate 662 is connected to the outer side of the spring tube 661.
The spring tube 661 is used to improve the cushioning performance inside the recess 66 to prevent the auxiliary pipe 23 from being worn by extrusion, and the arc plate 662 is used to increase the tightness of fitting with the auxiliary pipe 23 in the high-pressure water pump 2.
In order to better show the implementation flow of the intelligent noise reduction high-pressure water pump, the embodiment provides an implementation method of the intelligent noise reduction high-pressure water pump, which comprises the following steps:
s1, mounting a motor main body 1 and a high-pressure water pump 2 on a supporting plate 3 through screws, wherein a damping component 4 at the bottom of the motor main body can increase the damping and buffering performance of the supporting plate 3 so as to weaken vibration noise generated when the motor main body 1 runs;
s2, embedding a sliding seat 62 at the bottom of the silencing cover 6 into a sliding groove 51 on the surface of the bottom plate 5, pushing a cover body 61 to move to the forefront end of the bottom plate 5, and correspondingly inserting two baffle plates 64 into a slot 63 until a notch 66 at the inner side is clamped with an auxiliary pipeline 23 at the front end of the high-pressure water pump 2;
s3, starting the motor main body 1 to drive the high-pressure water pump 2 to normally operate, detecting noise generated by the motor main body 1 and the main pipeline 21 in the high-pressure water pump 2 through the sound wave detector 7, and transmitting the detected noise source to the intelligent cloud platform;
s4, comparing, identifying and classifying the received noise sources and sound waves based on a noise model stored in an audio library in the intelligent cloud platform, so as to obtain waveform data of noise sources with different frequencies in the sound waves;
s5, transmitting waveform data of noise sources with different frequencies in the sound wave to an adaptive filter, updating and adjusting a weighting coefficient through an adaptive filtering algorithm by the adaptive filter, and transmitting the weighting coefficient to a silencing processing module;
s6, controlling the noise reducer 8 to output a signal sequence of reverse interference acoustic waveforms at the position of a noise source to be muffled through the muffling processing module, thereby counteracting noise emitted by the main pipeline 21 in the motor main body 1 and the high-pressure water pump 2;
s7, the auxiliary pipeline 23 in the high-pressure water pump 2 passes through the silencing hole 243 on the surface of the rubber layer 24, the diversion ribs 241 and the silencing cavity 242 on the inner wall, so that noise generated by the collision of water flow in the auxiliary pipeline 23 and the inner wall is reduced; the noise generated by the water flow in the auxiliary duct 23 is further weakened by the damping felt 25 and the sound absorbing sponge 26 of the outer wall.
Working principle: the sound wave detector 7 detects the noise emitted by the main pipeline 21 in the motor main body 1 and the high-pressure water pump 2 and transmits the noise to the intelligent cloud platform; comparing, identifying and classifying the noise model with the received noise source and sound wave, thereby obtaining waveform data of noise sources with different frequencies; the weighting coefficient is updated and adjusted through the self-adaptive filtering algorithm, and the noise reducer 8 is controlled to output a signal sequence of reverse interference acoustic wave waveforms, so that noise emitted by the main pipeline 21 in the motor main body 1 and the high-pressure water pump 2 is counteracted; the rubber layer 24 is additionally arranged on the inner wall of the auxiliary pipeline 23 in the high-pressure water pump 2 so as to weaken the force of water flow striking the auxiliary pipeline 23; the flow guiding convex ribs 241 play a role in guiding water flow, and reduce friction impact of the water flow on the inner wall of the auxiliary pipeline 23; sound deadening hole 243 can make most of the water flow sound wave be conducted into sound deadening hole 243, sound deadening cavity 242 can make the small part of the water flow sound wave be conducted into sound deadening cavity 242, and water flow is reflected back and forth and consumed by sound deadening hole 243 and sound deadening cavity 242, so as to achieve sound deadening effect; the damping felt 25 and the sound-absorbing sponge 26 are additionally arranged on the outer wall of the auxiliary pipeline 23 so as to increase the effects of noise reduction and noise reduction of the outer part of the auxiliary pipeline 23; thereby guarantee that auxiliary pipe 23 extends to the outside of noise reduction cover 6 still can reach the function of noise reduction of amortization, improve the intellectuality and the effect of noise reduction of high pressure water pump 2 amortization.
Specifically, the method further comprises the following steps:
setting the size of the sound attenuation hole (243) according to waveform data of noise sources with different frequencies in the sound wave, comprising:
extracting waveform data of noise sources with different frequencies in the sound wave;
extracting the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise from the waveform data of the noise sources with different frequencies;
setting the radius of the silencing hole (243) according to the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise;
wherein the radius of the sound attenuation hole (243) is obtained by the following formula
Wherein R is 1 Represents the radius of the sound deadening hole (243); sqrt represents root number operation; k represents a constant (which can be obtained by analog simulation) related to the noise control effect; s is S maxi And S is mini A maximum noise value and a minimum noise value representing the i-th noise; n is the rating of the sound attenuation holeThe number of the layout; m represents the number of noise types; ΔS i The noise intensity variation corresponding to the i-th noise is shown.
The technical effects of the technical scheme are as follows: by extracting waveform data of noise sources with different frequencies in the sound wave and analyzing the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise, the size of the silencing hole can be designed and set for the noise sources with different frequencies. Thus, a more accurate silencing effect can be provided, and the silencing holes are more effective in controlling noise with different frequencies. By setting the size of the sound deadening holes according to the characteristics of each frequency noise, the sound deadening requirements of different frequency noises can be better adapted. Thus, the propagation and diffusion of noise with specific frequency can be reduced to the greatest extent, and better noise control effect is provided. By custom-designed noise abatement design for different frequency noise sources, the noise level can be effectively reduced.
Specifically, the method further comprises the following steps:
setting the size of a sound attenuation cavity (242) according to waveform data of noise sources with different frequencies in the sound wave, comprising:
extracting waveform data of noise sources with different frequencies in the sound wave;
extracting the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise from the waveform data of the noise sources with different frequencies;
setting the radius of the silencing cavity (242) according to the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise;
wherein the radius and length of the sound eliminating and reducing cavity (242) are obtained by the following formula
Wherein R is 1 Represents the radius of sound deadening hollow (242); sqrt represents root number operation; k represents a constant (which can be obtained by analog simulation) related to the noise control effect; s is S maxi And S is mini A maximum noise value and a minimum noise value representing the i-th noise; x is the rated layout number of the sound attenuation cavities (242); m represents the number of noise types; ΔS i Representing the noise intensity variation corresponding to the ith noise; s is S pi A noise average value representing the i-th noise; lambda represents the average value of the acoustic wave wavelength.
The technical effects of the technical scheme are as follows: by extracting waveform data of noise sources with different frequencies in the sound wave and analyzing the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise, the size of the silencing cavity can be designed and set for the noise sources with different frequencies. Therefore, a more accurate silencing effect can be provided, and the silencing cavity is more effective in controlling noise with different frequencies. By setting the size of the sound deadening cavity according to the characteristics of each frequency noise, the sound deadening requirements of different frequency noises can be better adapted. Thus, the propagation and diffusion of noise with specific frequency can be reduced to the greatest extent, and better noise control effect is provided. By custom-designed noise abatement design for different frequency noise sources, the noise level can be effectively reduced.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An intelligent noise reduction high pressure water pump, comprising: motor main part (1), its characterized in that, one side of motor main part (1) is connected with high-pressure water pump (2), motor main part (1) and high-pressure water pump (2) pass through screw demountable installation on backup pad (3), the bottom of backup pad (3) is connected with damper (4), damper (4)'s bottom is provided with bottom plate (5), noise reduction cover (6) have been cup jointed in the slip on bottom plate (5), evenly distributed is provided with four sound wave detector (7) on the inner wall of noise reduction cover (6) one end, parallel arrangement has four appearance (8) of making an uproar on the inner wall of noise reduction cover (6) one side, and sound wave detector (7) are connected with control system respectively with appearance (8) of making an uproar.
2. The intelligent silencing and noise reducing high-pressure water pump according to claim 1, wherein: the high-pressure water pump (2) comprises a main pipeline (21), a fixing base (22), an auxiliary pipeline (23), a rubber layer (24), damping felt (25), sound absorbing sponge (26) and tinfoil (27), one side of the main pipeline (21) is connected with a motor main body (1), the middle part of the main pipeline (21) is provided with the fixing base (22), the middle part of the main pipeline (21) is connected with the auxiliary pipeline (23) respectively with the opposite side of the main pipeline (21), the inner wall of the auxiliary pipeline (23) is provided with the rubber layer (24), the outer wall of the auxiliary pipeline (23) is provided with the damping felt (25), the outer wall of the damping felt (25) is provided with the sound absorbing sponge (26), the outer wall of the sound absorbing sponge (26) is provided with tinfoil (27), the inner wall of the rubber layer (24) is evenly distributed and is provided with the water conservancy diversion protruding muscle (241), the amortization cavity (242) are all seted up to the inside of every water conservancy diversion protruding muscle (241), and the surface of the rubber layer (24) evenly distributes and is provided with amortization hole (243).
3. The intelligent silencing and noise reducing high-pressure water pump according to claim 1, wherein: the damping component (4) comprises a supporting seat (41), a fixing plate (42) and spring columns (43), wherein the fixing plate (42) is arranged at the bottom end of the inside of the supporting seat (41), six spring columns (43) are uniformly distributed on the fixing plate (42), and a damper is arranged in each spring column (43).
4. The intelligent silencing and noise reducing high-pressure water pump according to claim 1, wherein: sliding grooves (51) are symmetrically formed in two sides of the surface of the bottom plate (5), and the inner parts of the sliding grooves (51) are convex.
5. The intelligent silencing and noise reducing high-pressure water pump according to claim 1, wherein: the silencing cover (6) comprises a cover body (61), sliding seats (62), slots (63), baffles (64), handles (65) and notches (66), wherein the sliding seats (62) are symmetrically arranged on two sides of the bottom of the cover body (61), the sliding seats (62) are concave, two slots (63) are symmetrically arranged at one end of the cover body (61), one baffle (64) is slidably inserted into each slot (63), the handles (65) are arranged on the outer side of each baffle (64), the notches (66) are formed in the inner side of each baffle (64), the notches (66) are semicircular, spring tubes (661) are arranged on the inner wall of each notch (66) in a surrounding mode, and arc plates (662) are connected to the outer sides of the spring tubes (661).
6. The intelligent silencing and noise reducing high-pressure water pump according to claim 1, wherein: the control system includes:
the noise detection module is used for detecting the noise emitted by the motor main body (1) and the high-pressure water pump (2) during working in real time based on the sound wave detector (7) so as to determine the position and sound wave of the noise source and transmitting the detected noise source to the intelligent cloud platform;
the intelligent cloud platform is used for collecting and storing the audios of various sound sources on line/off line so as to establish an audio library, comparing, identifying and classifying the received noise sources and sound waves, and transmitting the processed noise sources and sound waves to the adaptive filter;
the self-adaptive filter is used for receiving waveform data of noise sources with different frequencies in the processed sound wave and transmitting the waveform data to the silencing processing module connected with the self-adaptive filter;
and the silencing processing module is used for controlling the noise reducer (8) to rotate and the position of the noise source to be silenced based on the waveform data of the noise source received by the adaptive filter, so as to output a signal sequence of the reverse interference acoustic waveform of the noise source to be silenced and counteract noise.
7. The intelligent silencing and noise reducing high-pressure water pump according to claim 6, wherein: the intelligent cloud platform is also used for modeling and parameter training of various noise sources in the audio library, generating identification parameters corresponding to various noise sources, classifying various noise sources in a frequency division mode after identification, establishing cancellation factors corresponding to various noise sources with different frequencies, and providing basic noise filtering basis for the silencing processing module.
8. A method for implementing the intelligent silencing and noise-reducing high-pressure water pump according to any one of claims 1-7, which is characterized in that: the method comprises the following steps:
s1, mounting a motor main body (1) and a high-pressure water pump (2) on a supporting plate (3) through screws, wherein a damping component (4) at the bottom of the motor main body can increase the damping and buffering performance of the supporting plate (3) so as to weaken vibration noise generated when the motor main body (1) operates;
s2, embedding a sliding seat (62) at the bottom of a silencing cover (6) into a sliding groove (51) on the surface of a bottom plate (5), pushing a cover body (61) to move to the forefront end of the bottom plate (5), and correspondingly inserting two baffles (64) into a slot (63) until an inner notch (66) is clamped with an auxiliary pipeline (23) at the front end of a high-pressure water pump (2);
s3, starting the motor main body (1) to drive the high-pressure water pump (2) to normally operate, detecting noise emitted by the motor main body (1) and a main pipeline (21) in the high-pressure water pump (2) through the sound wave detector (7), and transmitting the detected noise source to the intelligent cloud platform;
s4, comparing, identifying and classifying the received noise sources and sound waves based on a noise model stored in an audio library in the intelligent cloud platform, so as to obtain waveform data of noise sources with different frequencies in the sound waves;
s5, transmitting waveform data of noise sources with different frequencies in the sound wave to an adaptive filter, updating and adjusting a weighting coefficient through an adaptive filtering algorithm by the adaptive filter, and transmitting the weighting coefficient to a silencing processing module;
s6, controlling a noise reduction instrument (8) to output a signal sequence of reverse interference acoustic waveforms at the position of a noise source to be subjected to noise reduction through a noise reduction processing module, so as to counteract noise emitted by a main pipeline (21) in the motor main body (1) and the high-pressure water pump (2);
s7, the auxiliary pipeline (23) in the high-pressure water pump (2) passes through the silencing hole (243) on the surface of the rubber layer (24) and the flow guide convex rib (241) and the silencing cavity (242) on the inner wall, so that noise generated by the impact of water flow in the auxiliary pipeline (23) and the inner wall is reduced; the noise generated by the water flow in the auxiliary pipeline (23) is further weakened by the damping felt (25) and the sound absorbing sponge (26) on the outer wall.
9. The method for realizing the intelligent silencing and noise reducing high-pressure water pump according to claim 8, wherein the method is characterized by comprising the following steps of: the method further comprises the steps of:
setting the size of the sound attenuation hole (243) according to waveform data of noise sources with different frequencies in the sound wave, comprising:
extracting waveform data of noise sources with different frequencies in the sound wave;
extracting the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise from the waveform data of the noise sources with different frequencies;
setting the radius of the silencing hole (243) according to the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise;
wherein the radius of the sound attenuation hole (243) is obtained by the following formula
Wherein R is 1 Represents the radius of the sound deadening hole (243); sqrt represents root number operation; k represents a constant related to the noise control effect; s is S maxi And S is mini Maximum noise value representing ith noiseAnd a minimum noise value; n is the rated layout number of the silencing holes; m represents the number of noise types; ΔS i The noise intensity variation corresponding to the i-th noise is shown.
10. The method for realizing the intelligent silencing and noise reducing high-pressure water pump according to claim 9, wherein the method comprises the following steps of: the method further comprises the steps of:
setting the size of a sound attenuation cavity (242) according to waveform data of noise sources with different frequencies in the sound wave, comprising:
extracting waveform data of noise sources with different frequencies in the sound wave;
extracting the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise from the waveform data of the noise sources with different frequencies;
setting the radius of the silencing cavity (242) according to the frequency, the maximum noise value, the minimum noise value and the noise intensity variation corresponding to each frequency noise;
wherein the radius and length of the sound eliminating and reducing cavity (242) are obtained by the following formula
Wherein R is 1 Represents the radius of sound deadening hollow (242); sqrt represents root number operation; k represents a constant related to the noise control effect; s is S maxi And S is mini A maximum noise value and a minimum noise value representing the i-th noise;
x is the rated layout number of the sound attenuation cavities (242); m represents the number of noise types; ΔS i Representing the noise intensity variation corresponding to the ith noise; s is S pi A noise average value representing the i-th noise; lambda represents the average value of the acoustic wave wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310708140.3A CN116538046A (en) | 2023-06-15 | 2023-06-15 | Intelligent silencing and noise reducing high-pressure water pump and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310708140.3A CN116538046A (en) | 2023-06-15 | 2023-06-15 | Intelligent silencing and noise reducing high-pressure water pump and implementation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116538046A true CN116538046A (en) | 2023-08-04 |
Family
ID=87452612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310708140.3A Pending CN116538046A (en) | 2023-06-15 | 2023-06-15 | Intelligent silencing and noise reducing high-pressure water pump and implementation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116538046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2622922A (en) * | 2022-08-01 | 2024-04-03 | Bosch Gmbh Robert | Method for operating an actuator device having an electric machine, apparatus for operating an actuator device having an electric machine, actuator device |
-
2023
- 2023-06-15 CN CN202310708140.3A patent/CN116538046A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2622922A (en) * | 2022-08-01 | 2024-04-03 | Bosch Gmbh Robert | Method for operating an actuator device having an electric machine, apparatus for operating an actuator device having an electric machine, actuator device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FAHY | Fundamentals of noise and vibration control | |
| CN100394475C (en) | System for inhibitting wind noise | |
| CN116538046A (en) | Intelligent silencing and noise reducing high-pressure water pump and implementation method thereof | |
| CN108916952A (en) | A kind of kitchen ventilator and noise-reduction method of Enclosed Sound Field denoising device | |
| CN107204181A (en) | A kind of resonant labyrinth noise reduction method and set composite | |
| CN105351037A (en) | Small-hole high-frequency noise eliminator | |
| KR100704555B1 (en) | Active type noise attenuation device for transformer | |
| Tiryakioglu | Sound radiation from the perforated end of a lined duct | |
| THOMPSON | Noise control | |
| CN107178673B (en) | Method and device for silencing pipeline noise gas | |
| JP2002073038A (en) | Active silencer | |
| Deryabin | On the issue of reducing the sound level emitted by the intake system of an internal combustion engine | |
| Patne et al. | Numerical analysis on improving transmission loss of reactive muffler using various sound absorptive materials | |
| CN106992066B (en) | A kind of active-mode active denoising device | |
| CN109404343B (en) | Silencing device, silencing system and cleaning equipment | |
| CN111210800A (en) | Musical instrument sound deadening system and method | |
| CN206921661U (en) | A kind of active-mode active denoising device | |
| JP5519912B2 (en) | Ultra-low frequency sound transmission reduction method and ultra-low frequency sound transmission reduction device | |
| CN111237103A (en) | Muffler element position optimization design method based on acoustic mode of air intake system | |
| CN112730625A (en) | Sound absorption coefficient testing system and method and vehicle | |
| RU2791855C1 (en) | Method for acoustic research of the intake system of an internal combustion engine | |
| CN114813193B (en) | Method and system for testing silencer based on silencing testing device | |
| CN215719050U (en) | Silencer and vehicle | |
| Couvreur et al. | On the use of artificial reverberation for ASR in highly reverberant environments | |
| Jadhav et al. | A Critical Review of Acoustic Investigation of Double Expansion Chamber Reactive Muffler |
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 |