CN111156205A - Air current noise elimination guiding device for aerodynamic equipment - Google Patents
Air current noise elimination guiding device for aerodynamic equipment Download PDFInfo
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- CN111156205A CN111156205A CN202010214475.6A CN202010214475A CN111156205A CN 111156205 A CN111156205 A CN 111156205A CN 202010214475 A CN202010214475 A CN 202010214475A CN 111156205 A CN111156205 A CN 111156205A
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- silencing
- cone
- guide
- sound absorption
- guiding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
Abstract
The invention discloses an airflow silencing and guiding device for aerodynamic equipment, which comprises a guiding mechanism and a silencing mechanism, wherein the guiding mechanism comprises a multistage guiding silencing cone, a positioning bracket component, a protective cover and a butt flange, the multistage guiding silencing cone is overlapped up and down and distributed in a clearance mode, the positioning bracket component comprises a plurality of supporting rods and a connecting ring, the protective cover is covered on the multistage guiding silencing cone, the lower end of the butt flange is connected with the silencing mechanism, the silencing mechanism comprises a silencing body and a silencing barrel, the silencing body is positioned in the silencing barrel, gaps are reserved among the silencing body and the silencing barrel, and a ventilation channel is formed by the gaps; the air current is by pouring into the safety cover inside all around in the ventilation hole on the safety cover, and the air current forms annular air current after the water conservancy diversion awl, enters into the ventiduct fast, and when the air current passed the ventiduct, the noise elimination section of thick bamboo and the noise elimination body of constituteing the ventiduct both sides carry out the efficient noise reduction to the noise.
Description
Technical Field
The invention relates to the technical field of aerodynamic noise prevention and control, in particular to an air flow silencing and guiding device for aerodynamic equipment.
Background
Along with the development of industry, the creation and use of various mechanical devices bring prosperity and progress to human beings, the living standard of human beings is greatly improved, but more and more noises are generated at the same time. If the patient is in a noise environment for a long time, the patient can suffer from deafness, hypertension, heart disease and other diseases; seriously affecting the physical and mental health of people, increasing the annoyance of people and reducing the life quality and the work efficiency of people.
At present, in the fields of subways, tunnels, mining industry and the like, in order to eliminate harmful gases, high-power fans are mostly used, a large amount of noise is generated, and therefore, a silencer is required to be used for eliminating the noise.
The prior noise eliminator is divided into a high-end noise elimination product and a low-end noise elimination product. Wherein, high-end product noise cancelling effect is better, but structural design is complicated, manufacturing and debugging require highly, the size is also comparatively huge to cause noise eliminator high price, the installation is comparatively inconvenient, can't extensively popularize in the in-service use.
The low-end product of the silencing device has simple design structure and low price, but has poor durability and poor silencing effect. Meanwhile, the fan generates additional noise, and also generates additional energy consumption and maintenance cost of the fan.
Disclosure of Invention
The invention aims to provide an airflow silencing and guiding device for aerodynamic equipment, which is used for guiding the airflow to a silencing mechanism for efficient noise reduction after the airflow is guided by a guiding mechanism and subjected to primary noise reduction, so that the noise generation of the aerodynamic equipment is greatly reduced, and a good working environment is created.
The technical scheme adopted by the invention is as follows:
an airflow silencing and guiding device for aerodynamic equipment comprises a guiding mechanism and a silencing mechanism, wherein the guiding mechanism comprises a multistage guiding silencing cone, a positioning support assembly, a protective cover and a butt flange, the multistage guiding silencing cone is in up-down laminated and interval distribution, each stage comprises an inverted conical guiding cone, the upper edge of the guiding cone extends outwards in parallel to form an annular supporting table, the tip of the guiding cone is provided with an opening, and the opening is connected with a guiding cylinder; the opening of the guide cone of each stage of guide silencing cone is gradually enlarged, and the diameter of the guide cylinder is gradually enlarged; the inner surfaces and the outer surfaces of the guide cone and the guide cylinder are respectively paved with sound insulation felts; the positioning support assembly comprises a plurality of support rods and a connecting ring, the support rods are arranged between the support tables of each stage of flow guide silencing cone, the lower ends of the support rods below the support table of the final stage of flow guide silencing cone are fixed with the upper end surface of the connecting ring, and the connecting ring is connected with the upper end surface of the butt flange; the protective cover is of a cylindrical structure with an opening at the lower end, a plurality of vent holes are uniformly formed in the protective cover, the protective cover covers the multistage flow guide noise elimination cone, and the lower end of the protective cover is fixed with the upper end face of the connecting ring; the lower end of the butt flange is connected with a silencing mechanism; the silencing mechanism comprises a silencing body and a silencing tube, wherein the silencing body is positioned in the silencing tube, and a gap is reserved between the silencing body and the silencing tube; the silencing cylinder comprises a cylindrical support, sound absorption materials are filled in the cylindrical support, a flexible sound insulation plate wraps the periphery of the cylindrical support, connecting flanges are respectively installed at two ends of the cylindrical support, and the connecting flange at the upper end of the cylindrical support is connected with a butt flange of the flow guide mechanism in a matching mode; the silencer is of an ellipsoidal structure with a wide middle and narrow two ends, two ends of the silencer are respectively connected with a support frame, and the support frames are connected to the inner cylinder wall; the noise elimination body is made of noise elimination material.
The multistage flow-guiding silencing cone adopts three stages and comprises a superior flow-guiding silencing cone, a middle flow-guiding silencing cone and a final flow-guiding silencing cone, a guide cylinder suspension of the superior flow-guiding silencing cone is positioned in the guide cone of the middle flow-guiding silencing cone, a guide cylinder suspension of the middle flow-guiding silencing cone is positioned in the guide cone of the final flow-guiding silencing cone, and the lower end of the guide cylinder of the final flow-guiding silencing cone is positioned above the connecting ring.
The upper-stage flow guide silencing cone, the middle-stage flow guide silencing cone and the final-stage flow guide silencing cone are all made of metal plates or are made of rubber or plastic through shaping.
The protective cover is made of a porous plate; the top of the protective cover is in butt welding with a supporting table of a higher-level flow guide noise elimination cone, and the inner side wall of the protective cover is respectively welded and fixed with the outer edge of the supporting table of the third-level flow guide noise elimination cone; the lower edge of the protective cover is fixed with the upper end face of the connecting ring.
The cylindrical support comprises shaping rings and four supporting columns at two ends, the four supporting columns are arranged in a regular quadrilateral structure, two ends of each supporting column are internally tangent and fixed with the corresponding shaping ring, a plurality of reinforcing rings are distributed between the two shaping rings, the four supporting columns form a square inner frame, resistive sound absorption strips are arranged at four corner positions of the square inner frame, the internally tangent surface of each resistive sound absorption strip is an outwards protruded arc surface, the two shaping rings and the reinforcing rings form a cylindrical outer frame, a gap between the inner frame and the outer frame is filled with a sound absorption material, and a flexible sound insulation plate is wrapped on the periphery of the outer frame; and the inner side wall of the sound absorption material is provided with sound absorption protective cloth.
The flexible sound insulation board comprises a sound absorption layer of a central layer, a waterproof and anti-static fiber protection layer is wrapped on the periphery of the sound absorption layer, and a flexible anti-static flame-retardant layer is wrapped on the outer layer of the waterproof and anti-static fiber protection layer; the sound absorption layer is made of fiber type or foam type or granular material with sound absorption function, and corresponding sound absorption material is selected according to the wavelength and frequency of sound waves; the waterproof and antistatic fiber protective layer adopts non-woven fabrics with waterproof and antistatic functions; the flexible anti-static flame-retardant layer is formed by coating elastic environment-friendly damping materials on flexible flame-retardant anti-static non-woven fabrics.
The noise elimination body include the noise elimination shell, the noise elimination shell is formed by the perforated plate preparation, the inner wall of noise elimination shell on lay the sound absorption and protect cloth, wrap up sound absorbing material in the sound absorption and protect cloth.
The support frame adopts four support rods, one ends of the four support rods are fixed at the tip part of the noise elimination body in a concentrated mode, and the other ends of the four support rods are correspondingly fixed at four right-angle positions of the inner cylinder respectively.
The sound absorption material is one or more of organic fiber material, inorganic fiber material, glass fiber cotton, rock wool, mineral wool or granular sound absorption material.
The sound absorption protective cloth adopts a sound insulation felt or a supermolecule sound absorption film.
The three-stage flow guide silencing cone is utilized, the three-stage flow guide silencing cone is in up-down laminated and interval distribution, the opening of the flow guide cone of each stage of flow guide silencing cone is gradually enlarged, and the diameter of the flow guide cylinder is gradually enlarged. The three-stage flow guide silencing cone is coaxially installed and fixed from top to bottom, an airflow channel of a gradually expanding type guide cylinder communicated with the air inlet port is formed in the flow guide cone, an annular air inlet is formed in the air inlet port, air can enter the multi-stage flow guide silencing cone along the radial direction and the annular air inlet, air flow can enter the multi-stage flow guide silencing cone from the circumferential direction, air flow noise is reduced from an air inlet source, and the air flow noise is reduced to the maximum extent while the ventilation efficiency is ensured.
Simultaneously, the inner surface and the surface of water conservancy diversion awl and draft tube are all spread and are pasted the deadening felt, and after the wind current got into the safety cover, collide with the inner surface and the surface of water conservancy diversion awl and draft tube and assault, the noise that the wind current itself carried and the noise that the collision sent are inhaled the sound by the deadening felt and are handled to the noise reduction of first time.
Furthermore, the noise elimination mechanism is used for efficient noise reduction, a noise elimination body and a noise elimination barrel are mainly adopted, sound absorption materials are filled in the noise elimination barrel to facilitate noise absorption, the noise elimination body is of an ellipsoidal structure with a wide middle and narrow two ends, a noise elimination shell is made of a porous plate, and the sound absorption materials are filled in the noise elimination shell. The gap between the silencing tube and the silencing body forms an annular air channel, and when air flow passes through the air channel, the noise is efficiently reduced by the silencing tube and the silencing body which form the two sides of the air channel. The noise elimination body is of an ellipsoidal structure and has a certain arc shape, so that air flow can smoothly circulate, the air inlet amount of the ventilator is guaranteed, and the use requirement of the ventilator is met.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a perspective view of the deflector mechanism of the present invention;
FIG. 3 is a schematic view of a flow guide silencing cone structure of the flow guide mechanism of the present invention;
FIG. 4 is a schematic perspective view of the muffling mechanism of the present invention;
FIG. 5 is a cross-sectional view of the muffling mechanism of the present invention;
FIG. 6 is a schematic view of the construction of the flexible baffle of the present invention.
Detailed Description
As shown in fig. 1-6 and fig. 1-5, the invention comprises a flow guide mechanism a and a noise elimination mechanism B, wherein the flow guide mechanism a comprises a multistage flow guide noise elimination cone 1, a positioning bracket assembly, a protection cover 2 and a butt flange 3, the multistage flow guide noise elimination cone 1 is in up-down laminated and interval distribution, each stage comprises a flow guide cone 4 with an inverted cone structure, the upper edge of the flow guide cone 4 extends outwards in parallel to form an annular support platform 5, the tip of the flow guide cone 4 is provided with an opening, and the opening is connected with a flow guide cylinder 6; the opening of the diversion cone 4 of each stage of diversion silencing cone 1 is gradually reduced, and the diameter of the diversion cylinder 6 is gradually increased; the inner surfaces and the outer surfaces of the guide cone 4 and the guide cylinder 6 are respectively paved with sound insulation felts 7; the positioning support assembly comprises a plurality of support rods 8 and a connecting ring 9, the support rods 8 are arranged between the support platforms 5 of each stage of flow guide noise elimination cone 1, the lower ends of the support rods 8 below the support platform 5 of the final stage of flow guide noise elimination cone are fixed with the upper end surface of the connecting ring 9, and the connecting ring 9 is connected with the upper end surface of the butt flange 3; the protective cover 2 is of a cylindrical structure with an opening at the lower end, a plurality of vent holes are uniformly formed in the protective cover 2, the protective cover 2 covers the multistage flow guide noise elimination cone 1, and the lower end of the protective cover 2 is fixed with the upper end face of the connecting ring 9; the lower end of the butt flange 3 is connected with a silencing mechanism B.
As shown in fig. 3, the multistage flow-guiding noise-eliminating cone 1 is of three stages, and includes a superior flow-guiding noise-eliminating cone, an intermediate flow-guiding noise-eliminating cone and a final flow-guiding noise-eliminating cone, a suspension of a guide cylinder 6 of the superior flow-guiding noise-eliminating cone is located in the guide cone 4 of the intermediate flow-guiding noise-eliminating cone, a suspension of the guide cylinder 6 of the intermediate flow-guiding noise-eliminating cone is located in the guide cone 4 of the final flow-guiding noise-eliminating cone, and the lower end of the guide cylinder 6 of the final flow-guiding noise-eliminating cone is located. The invention is not limited to three stages, and can adopt one stage, two stages, four stages, five stages and the like according to the environmental use condition.
The upper-stage flow guide silencing cone, the middle-stage flow guide silencing cone and the final-stage flow guide silencing cone are all made of metal plates or are made of rubber or plastic through shaping.
As shown in fig. 2, the protective cover 2 is made of a porous plate; the top of the protective cover 2 is in butt welding with the supporting table 5 of the upper-level flow guide noise elimination cone, and the inner side wall of the protective cover 2 is respectively welded and fixed with the outer edge of the supporting table 5 of the third-level flow guide noise elimination cone 1; the lower edge of the protective cover 2 is fixed with the upper end surface of the connecting ring 9.
As shown in fig. 4-5, the silencing mechanism includes a silencing body and a silencing barrel, the silencing body is located inside the silencing barrel, and a gap is formed between the silencing body and the silencing barrel; the silencing cylinder comprises a cylindrical support, sound absorption materials are filled in the cylindrical support, a flexible sound insulation plate 13 is wrapped on the periphery of the cylindrical support, two ends of the cylindrical support are respectively provided with a connecting flange 12, and the connecting flange 12 at the upper end is connected with the butt flange 3 of the flow guide mechanism in a matching manner; the silencer is of an ellipsoidal structure with a wide middle and narrow two ends, two ends of the silencer are respectively connected with a support frame, and the support frames are connected to the inner cylinder wall; the noise elimination body is made of noise elimination material.
The cylindrical support comprises shaping rings 18 and four supporting columns 14 at two ends, the four supporting columns 14 are arranged in a regular quadrilateral structure, two ends of each supporting column are internally tangent and fixed with the corresponding shaping ring 18, a plurality of reinforcing rings 19 are distributed between the two shaping rings 18, the four supporting columns 14 form a square inner frame, resistive sound-absorbing strips 23 are mounted at four corner positions of the square inner frame, the inner side surfaces of the resistive sound-absorbing strips 23 are cambered surfaces protruding outwards, and two right-angle surfaces of the resistive sound-absorbing strips 23 are attached to the corner surfaces; the two shaping rings 18 and the reinforcing ring 19 form a cylindrical outer frame, a gap between the inner frame and the outer frame is filled with sound absorption materials, and the periphery of the outer frame is wrapped with the flexible sound insulation plate 13; and the inner side wall of the sound absorption material is provided with sound absorption protective cloth 15.
As shown in fig. 6, the flexible sound insulation board includes a sound absorption layer 20 of a central layer, a waterproof and antistatic fiber protective layer 21 is wrapped around the sound absorption layer, and a flexible antistatic flame retardant layer 22 is wrapped around the waterproof and antistatic fiber protective layer; the sound absorption layer is made of fiber type or foam type or granular material with sound absorption function, and corresponding sound absorption material is selected according to the wavelength and frequency of sound waves; the waterproof and antistatic fiber protective layer adopts non-woven fabrics with waterproof and antistatic functions; the flexible anti-static flame-retardant layer is formed by coating elastic environment-friendly damping materials on flexible flame-retardant anti-static non-woven fabrics.
The noise elimination body comprises a noise elimination shell 16, and the noise elimination shell 16 is made of a porous plate; and a sound absorption protective cloth 15 is laid on the inner wall of the sound attenuation shell 16, and a sound absorption material is wrapped in the sound absorption protective cloth 15.
The supporting frame 17 adopts four supporting rods, one ends of the four supporting rods are fixed at the tip end of the noise elimination body in a concentrated mode, and the other ends of the four supporting rods are correspondingly fixed at four right-angle positions of the inner cylinder 11 respectively.
The sound absorption material is one or more of organic fiber material, inorganic fiber material, glass fiber cotton, rock wool, mineral wool or granular sound absorption material.
The sound absorption protective cloth 15 adopts a sound insulation felt or a supermolecule sound absorption film.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is assembled by two parts, which comprises a flow guide mechanism A and a silencing mechanism B, wherein the flow guide mechanism A and the silencing mechanism B are butted through a flange plate. The concrete structure is as follows:
the guide mechanism A mainly depends on the three-level guide silencing cone 1 to dredge and smoothly flow the airflow, the three-level guide silencing cone 1 is in up-down laminated and interval distribution, the opening of the guide cone 4 of each level of guide silencing cone 1 is gradually reduced, and the diameter of the guide cylinder 6 is gradually increased. Of course, not only three stages, but also 2 stages, four stages, and five stages can be used, and the setting is performed according to the use environment. The opening of the guide cone 4 is gradually reduced, and the diameter of the guide cylinder 6 is gradually increased to ensure that the air flow discharged by the guide cylinder 6 at the upper level can be smoothly guided into the air inlet of the ventilator, and ensure that the air flow at the current level can smoothly pass through the guide cylinder 6 at the current level. The three-stage flow guide noise elimination cone 1 is coaxially installed and fixed from top to bottom, an airflow channel communicated with a gradually expanding type guide shell 6 of an air inlet port is formed in the flow guide cone 4, an annular air inlet is formed in the air inlet port, air can enter the multistage flow guide noise elimination cone 1 along the axial direction and the annular air inlet, air flow can enter the multistage flow guide noise elimination cone 1 from the circumferential direction, airflow noise is reduced from the source of air inlet, and the airflow noise is reduced to the maximum extent while the ventilation efficiency is ensured.
And the three-stage flow guide silencing cone 1 is made of metal plates or rubber or plastic in a molding mode, and is made of alloy plates with light weight, so that the alloy plates can prevent corrosion in a humid environment on one hand, and are light in weight on the other hand, the mounting strength and the weight of the whole equipment are reduced, and the bearing pressure of the main load equipment is reduced.
Meanwhile, as the inner surfaces and the outer surfaces of the guide cone 4 and the guide cylinder 6 are respectively paved with the sound insulation felt 7, after the air flow enters the protective cover 2, the air flow collides with the inner surfaces and the outer surfaces of the guide cone 4 and the guide cylinder 6, and the noise carried by the air flow and the noise emitted by the collision are absorbed by the sound insulation felt 7, so that the noise is reduced.
When the timing is built, this device adopts locating support subassembly to support and fix a position, and bracing piece 8 is located between every grade of water conservancy diversion noise elimination awl 1's the brace table 5, and bracing piece 8's effect supports every grade of water conservancy diversion noise elimination awl 1 for certain space has between the 1 inferior level of water conservancy diversion noise elimination awl, makes things convenient for the entering of air current. Not only play the effect of support, simultaneously, play certain limited positioning action, with the interval control between the upper and lower level water conservancy diversion noise elimination awl 1 at certain distance, guarantee the high ventilation volume promptly, guarantee again that the noise reduction rate effect is good. Repeated experiments show that the best effect is achieved when the lower end part of the guide shell 6 at the upper stage is arranged 1-3cm above the guide shell 6 at the lower stage.
When the silencer is connected with the silencing mechanism B, the butting flange 3 is designed, and the butting flange 3 is firmly connected, so that the silencer is convenient to disassemble and install, and time and labor are saved.
The silencing mechanism B mainly adopts a silencing body and a silencing barrel, wherein the silencing body is suspended in the air and positioned in the center of the interior of the silencing barrel; the silencing cylinder comprises a cylindrical support, sound absorption materials are filled in the cylindrical support, a flexible sound insulation plate 13 is wrapped on the periphery of the cylindrical support, connecting flanges 12 are respectively installed at two ends of the cylindrical support, the connecting flange 12 at the upper end is connected with the butt flange 3 of the flow guide mechanism in a matched mode, and the connecting flange at the lower end is used for being connected to an air inlet of the ventilator. The cylindrical support comprises shaping rings 18 and four supporting columns 14 at two ends, the four supporting columns 14 are arranged in a regular quadrilateral structure, two ends of each supporting column 14 are fixedly inscribed in the corresponding shaping ring 18, a plurality of reinforcing rings 19 are distributed between the two shaping rings 18, the four supporting columns 14 form a square inner frame, resistive sound-absorbing strips 23 are mounted at four corner positions of the square inner frame, the inscribed surfaces of the resistive sound-absorbing strips 23 are cambered surfaces protruding outwards, the two shaping rings 18 and the reinforcing rings 19 form a cylindrical outer frame, a gap between the inner frame and the outer frame is filled with a sound-absorbing material, and a flexible sound-insulating plate 13 is wrapped on the periphery of the outer frame; and the inner side wall of the sound absorption material is provided with sound absorption protective cloth 15. The four supporting columns 14 are made of angle steel, the shaping ring 18 is made of a stainless steel ring and made of a metal material with certain hardness and rigidity, and the function of protection and support is achieved; the inner side wall of the sound absorption material forms a square structure, and in combination, the resistive sound absorption strip 23 is arranged at the fillet position of the square structure, and the inner side surface of the resistive sound absorption strip 23 is an outwards-protruding cambered surface which interferes with the direction of air flow and is used for overcoming the eddy current effect of power equipment; the diameter of the outer frame is close to the size of the aerodynamic device, so that the outer frame is convenient to match with the existing ventilator models and is convenient to install. The inner side wall of the sound absorption material is provided with sound absorption protective cloth 15, and the sound absorption protective cloth 15 adopts a sound insulation felt or a supermolecule sound absorption film, so that noise is conveniently absorbed.
The sound absorption is not enough only by using sound absorption materials and flexible sound insulation boards, so the invention designs a sound attenuation body structure, the sound attenuation body is in an ellipsoidal structure with a wide middle and narrow two ends, a sound attenuation shell 16 is made of a porous plate, sound absorption protective cloth 15 is laid on the inner wall of the sound attenuation shell 16, and the sound absorption materials are wrapped in the sound absorption protective cloth 15. And then the supporting frames 17 at the two ends are suspended in the center of the silencing tube. The support frame 17 adopts four support rods 8, one ends of the four support rods 8 are fixed at the tip end of the noise elimination body in a centralized manner, the other ends of the four support rods 8 are respectively and correspondingly fixed at four right-angle positions of the inner cylinder 11, and the support frame 17 is in a four-edge conical shape and is firmer. In the high-speed impact process of the airflow, the front impact force of the airflow is reduced, the pressure reduction effect is achieved, and the airflow is firmer and more reliable.
The flexible sound insulation board is mainly manufactured by the sound absorption layer 20 of the central layer, the sound absorption layer 20 is made of fiber type or foam type or particle type materials with sound absorption function, different sound absorption materials can be configured aiming at different external environments, and the application of multiple environments and multiple conditions is met; in order to further achieve the waterproof and antistatic effects, the periphery of the sound absorption layer is wrapped with a waterproof and antistatic fiber protection layer 21, a non-woven fabric with waterproof and antistatic functions is adopted, and the sound absorption layer is wrapped in an all-around manner through the waterproof and antistatic fiber protection layer, so that the material of the sound absorption layer is prevented from leaking. Finally, waterproof, the outer coating of antistatic fiber system protective layer establishes flexible antistatic flame-retardant layer 22, coat elasticity environmental protection damping material by flexible fire-retardant antistatic non-woven fabrics and constitute, can adopt dryer cloth or silica gel cloth, elasticity environmental protection damping material perhaps is the environmental protection damping material who takes the macromolecule, on the one hand, strengthen flexible fire-retardant elasticity and the waterproof nature of antistatic non-woven fabrics, on the other hand has the plastic effect of solid shape of one to fire-retardant antistatic non-woven fabrics, make fire-retardant antistatic non-woven fabrics have certain flexibility and plasticity, and can strengthen toughness and the wearability of fire-retardant antistatic non-woven fabrics.
The gap between the silencing tube and the silencing body forms an annular air channel, and when air flow passes through the air channel, the noise is efficiently reduced by the silencing tube and the silencing body which form the two sides of the air channel. The noise elimination body is of an ellipsoidal structure and has a certain arc shape, so that the air flow resistance can be reduced, the circulation is smooth, the air inlet volume of the ventilator is ensured, and the requirements of the ventilator are met. Not only an ellipsoid structure or a structure formed by combining two symmetrical cones with a certain arc shape can be adopted.
The sound absorption material is one or more of organic fiber material, inorganic fiber material, glass fiber cotton, rock wool, mineral wool or granular sound absorption material. The sound absorption material can select different structural factors and sound absorption materials with different types and densities according to the frequency spectrum characteristics of the noise source; all have good sound absorption effect, fill different materials according to the service environment that does not use, reach the best sound absorption effect.
The working principle of the invention is as follows: firstly, the guide mechanism A and the silencing mechanism B are connected through a butt flange 3, and then connected to an air inlet of the ventilator through a connecting flange 12 of the silencing mechanism B. When the ventilator is started, airflow is poured into the protective cover 2 from the periphery through the vent holes on the protective cover 2, the airflow entering the upper end of the protective cover 2 enters through the large opening of the diversion cone 4 of the cone structure of the upper diversion noise elimination cone, and the airflow forms annular airflow after passing through the diversion cone 4 and then enters into the diversion cone 4 of the middle diversion noise elimination cone from the diversion cylinder 6 of the upper diversion noise elimination cone; the air flow entering from the middle part of the protective cover 2 directly enters the guide cone 4 of the cone structure of the middle-stage guide silencing cone, forms an annular air flow after passing through the guide cone 4, and then enters the guide cone 4 of the final-stage guide silencing cone from the guide cylinder 6 of the middle-stage guide silencing cone 1; similarly, the air flow entering from the lower part of the protective cover 2 directly enters the diversion cone 4 of the cone structure of the final diversion noise elimination cone, and forms an annular air flow after passing through the diversion cone 4, and then enters the air duct of the noise elimination mechanism B from the diversion cylinder 6 of the final diversion noise elimination cone, and when the air flow passes through the air duct, the noise elimination cylinders and the noise elimination bodies on the two sides of the air duct perform efficient noise reduction treatment on noise.
The invention has simple and convenient installation and good silencing effect; the air-conditioning fan is arranged on an airflow channel of aerodynamic equipment or in an air inlet system and an air outlet system, and can effectively reduce ventilation noise.
The invention reduces the transmission of noise along the axial direction by adopting a radial annular air inlet mode and using a conical structure at the front end air inlet, changes the transmission path of noise by the guide of the guide cone and the guide cylinder, absorbs and attenuates the noise, and simultaneously improves the pneumatic performance of the fan.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an air current noise elimination guiding device for aerodynamic equipment which characterized in that: the guide mechanism comprises a multi-stage guide silencing cone, a positioning support component, a protective cover and a butt flange, wherein the multi-stage guide silencing cone is stacked up and down and distributed in a clearance manner, each stage of guide cone comprises an inverted cone-shaped guide cone, the upper edge of the guide cone extends outwards in parallel to form an annular supporting table, the tip of the guide cone is provided with an opening, and the opening is connected with a guide cylinder; the opening of the guide cone of each stage of guide silencing cone is gradually enlarged, and the diameter of the guide cylinder is gradually enlarged; the inner surfaces and the outer surfaces of the guide cone and the guide cylinder are respectively paved with sound insulation felts; the positioning support assembly comprises a plurality of support rods and a connecting ring, the support rods are arranged between the support tables of each stage of flow guide silencing cone, the lower ends of the support rods below the support table of the final stage of flow guide silencing cone are fixed with the upper end surface of the connecting ring, and the connecting ring is connected with the upper end surface of the butt flange; the protective cover is of a cylindrical structure with an opening at the lower end, a plurality of vent holes are uniformly formed in the protective cover, the protective cover covers the multistage flow guide noise elimination cone, and the lower end of the protective cover is fixed with the upper end face of the connecting ring; the lower end of the butt flange is connected with a silencing mechanism; the silencing mechanism comprises a silencing body and a silencing tube, wherein the silencing body is positioned in the silencing tube, and a gap is reserved between the silencing body and the silencing tube; the silencing cylinder comprises a cylindrical support, sound absorption materials are filled in the cylindrical support, a flexible sound insulation plate wraps the periphery of the cylindrical support, connecting flanges are respectively installed at two ends of the cylindrical support, and the connecting flange at the upper end of the cylindrical support is connected with a butt flange of the flow guide mechanism in a matching mode; the silencer is of an ellipsoidal structure with a wide middle and narrow two ends, two ends of the silencer are respectively connected with a support frame, and the support frames are connected to the inner cylinder wall; the noise elimination body is made of noise elimination material.
2. The air flow muffling and guiding device for aerodynamic equipment according to claim 1, wherein: the multistage flow-guiding silencing cone adopts three stages and comprises a superior flow-guiding silencing cone, a middle flow-guiding silencing cone and a final flow-guiding silencing cone, a guide cylinder suspension of the superior flow-guiding silencing cone is positioned in the guide cone of the middle flow-guiding silencing cone, a guide cylinder suspension of the middle flow-guiding silencing cone is positioned in the guide cone of the final flow-guiding silencing cone, and the lower end of the guide cylinder of the final flow-guiding silencing cone is positioned above the connecting ring.
3. The air flow muffling and guiding device for aerodynamic equipment according to claim 2, wherein: the upper-stage flow guide silencing cone, the middle-stage flow guide silencing cone and the final-stage flow guide silencing cone are all made of metal plates or are made of rubber or plastic through shaping.
4. The air flow muffling and guiding device for aerodynamic equipment according to claim 1, wherein: the protective cover is made of a porous plate; the top of the protective cover is in butt welding with a supporting table of a higher-level flow guide noise elimination cone, and the inner side wall of the protective cover is respectively welded and fixed with the outer edge of the supporting table of the third-level flow guide noise elimination cone; the lower edge of the protective cover is fixed with the upper end face of the connecting ring.
5. The air flow muffling and guiding device for aerodynamic equipment according to claim 1, wherein: the cylindrical support comprises shaping rings at two ends and four supporting columns, the four supporting columns are arranged in a regular quadrilateral structure, two ends of each supporting column are internally tangent and fixed with the corresponding shaping ring, a plurality of reinforcing rings are distributed between the two shaping rings, the four supporting columns form a square inner frame, resistive sound absorption strips are installed at four corner positions of the square inner frame, and the inner side surfaces of the resistive sound absorption strips are cambered surfaces protruding outwards; the two shaping rings and the reinforcing ring form a cylindrical outer frame, a gap between the inner frame and the outer frame is filled with sound absorption materials, and the periphery of the outer frame is wrapped with a flexible sound insulation plate; and the inner side wall of the sound absorption material is provided with sound absorption protective cloth.
6. The air flow muffling and guiding device for aerodynamic equipment according to claim 1 or 5, wherein: the flexible sound insulation board comprises a sound absorption layer of a central layer, a waterproof and anti-static fiber protection layer is wrapped on the periphery of the sound absorption layer, and a flexible anti-static flame-retardant layer is wrapped on the outer layer of the waterproof and anti-static fiber protection layer; the sound absorption layer is made of fiber type or foam type or granular material with sound absorption function, and corresponding sound absorption material is selected according to the wavelength and frequency of sound waves; the waterproof and antistatic fiber protective layer adopts non-woven fabrics with waterproof and antistatic functions; the flexible anti-static flame-retardant layer is formed by coating elastic environment-friendly damping materials on flexible flame-retardant anti-static non-woven fabrics.
7. The air flow muffling and guiding device for aerodynamic equipment according to claim 1, wherein: the noise elimination body include the noise elimination shell, the noise elimination shell is formed by the perforated plate preparation, the inner wall of noise elimination shell on lay the sound absorption and protect cloth, wrap up sound absorbing material in the sound absorption and protect cloth.
8. The air flow muffling and guiding device for aerodynamic equipment according to claim 1, wherein: the support frame adopts four support rods, one ends of the four support rods are fixed at the tip part of the noise elimination body in a concentrated mode, and the other ends of the four support rods are correspondingly fixed at four right-angle positions of the inner cylinder respectively.
9. The air flow muffling and guiding device for aerodynamic devices according to claim 1, 5 or 7, wherein: the sound absorption material is one or more of organic fiber material, inorganic fiber material, glass fiber cotton, rock wool, mineral wool or granular sound absorption material.
10. The air flow muffling and guiding device for aerodynamic equipment according to claim 5 or 7, wherein: the sound absorption protective cloth adopts a sound insulation felt or a supermolecule sound absorption film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214475.6A CN111156205A (en) | 2020-03-24 | 2020-03-24 | Air current noise elimination guiding device for aerodynamic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214475.6A CN111156205A (en) | 2020-03-24 | 2020-03-24 | Air current noise elimination guiding device for aerodynamic equipment |
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| CN111156205A true CN111156205A (en) | 2020-05-15 |
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| CN202010214475.6A Pending CN111156205A (en) | 2020-03-24 | 2020-03-24 | Air current noise elimination guiding device for aerodynamic equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153825A (en) * | 2021-02-07 | 2021-07-23 | 李卫东 | A silencing device and fan for fan |
| CN113834141A (en) * | 2021-11-30 | 2021-12-24 | 诸城市松源木业有限责任公司 | Dehumidification equipment in warehouse |
| CN114738327A (en) * | 2022-05-13 | 2022-07-12 | 山东省章丘鼓风机股份有限公司 | Silencer with flow guide cone |
-
2020
- 2020-03-24 CN CN202010214475.6A patent/CN111156205A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153825A (en) * | 2021-02-07 | 2021-07-23 | 李卫东 | A silencing device and fan for fan |
| CN113834141A (en) * | 2021-11-30 | 2021-12-24 | 诸城市松源木业有限责任公司 | Dehumidification equipment in warehouse |
| CN113834141B (en) * | 2021-11-30 | 2022-02-11 | 诸城市松源木业有限责任公司 | Dehumidification equipment in warehouse |
| CN114738327A (en) * | 2022-05-13 | 2022-07-12 | 山东省章丘鼓风机股份有限公司 | Silencer with flow guide cone |
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