CN209960730U - Noise reduction system for exhaust fan of gas turbine housing - Google Patents
Noise reduction system for exhaust fan of gas turbine housing Download PDFInfo
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- CN209960730U CN209960730U CN201920799278.8U CN201920799278U CN209960730U CN 209960730 U CN209960730 U CN 209960730U CN 201920799278 U CN201920799278 U CN 201920799278U CN 209960730 U CN209960730 U CN 209960730U
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Abstract
The utility model provides a gas turbine housing fan noise reduction system of airing exhaust, its factory building sets up the fan of airing exhaust and exhaust pipe of interconnect outward, the fan surface of airing exhaust sets up sound insulation parcel structure, the silencer part is connected to the exhaust pipe air outlet, and this silencer part is fixed in the factory building top through silencer damping device, the exhaust pipe turn sets up the noise elimination elbow, and this noise elimination elbow internally arranged has a plurality of high frequency filter modules, exhaust pipe and factory building wall department installation pipeline shock attenuation support, gas turbine housing fan noise reduction system of airing exhaust have the noise elimination, absorb sound, the synergistic noise reduction effect of damping, the influence of reduction noise vibration to the external environment of factory building that can be very big.
Description
Technical Field
The utility model belongs to the technical field of noise pollution control technique and specifically relates to indicate a gas turbine housing fan noise reduction system of airing exhaust.
Background
Current ways of controlling noise in terms of noise generation, propagation and attenuation can be divided into three broad categories: control at the source of the noise, control during the propagation of the noise and control at the receptor of the noise. The most effective way is to take measures at the noise source, and the most common control technologies mainly include sound absorption and noise reduction, noise elimination and noise reduction, and vibration isolation.
①, when sound waves are incident on the surface of the material, part of the sound energy is reflected and part of the sound energy is absorbed by the interface, the absorbed sound energy is dissipated mainly in three forms, namely, the sound energy is transmitted to the other side through the material, the sound energy is converted into heat in the material and dissipated, and the vibration kinetic energy is transferred along the boundary structure.
② noise elimination and reduction, the measure of noise elimination and reduction is mainly a muffler, which not only allows the air flow to pass through smoothly, but also can make the noise in the pipe attenuated or reflected back by the pipe and elbow with sound absorption lining or the noise reduction device such as the pipe with suddenly changed cross section and other discontinuous acoustic impedance, thereby effectively preventing or reducing the sound energy from spreading outwards.
③ vibration isolation, vibration isolation measures can be applied to vibration source and vibration isolation object, the former is called active vibration isolation to reduce the disturbance force generated by power equipment to be transmitted to outside and reduce the vibration output, the latter is called passive vibration isolation to reduce the influence of external vibration on the vibration isolation object, namely reduce the vibration input, and the two types of vibration isolation are that vibration isolation material is additionally arranged between the vibration or vibration isolation object and the supporting structure.
The noise value of main equipment of a combustion engine of a gas power plant is high, generally about 100 decibels, and a mode of closing a housing is usually adopted for controlling the noise of the main equipment, but related ventilation measures need to be considered from a process perspective, and an exhaust fan is used for ventilating and exchanging air in the housing outdoors. Therefore, the exhaust fan can directly guide the noise energy in the housing to the outdoor, and the noise energy can affect the acoustic environment.
The existing noise reduction measure for the exhaust fan of the gas turbine housing outside a factory building mainly comprises the steps that a metal sound absorption and insulation wall body is designed at the position of an exhaust fan body, and a silencer is installed at the position of an exhaust port, wherein the measure has the following main defects: 1. the exhaust fan housing has large load, and because the ventilation opening and the access opening need to be designed for sealing, a silencer needs to be installed at the ventilation opening, and a soundproof door needs to be designed at the access opening; 2. the silencer at the air outlet has larger volume and large load, so that the common resistance loss is also larger to meet the requirement of the silencing quantity, and the influence is brought to the model selection and the process operation of the fan; 3. the exhaust pipeline still has great influence on the environment without taking noise reduction measures; 4. secondary noise is generated by vibration of the exhaust pipeline, and the influence on the environment is large; 5. because the volume of the exhaust fan of the housing of the combustion engine is smaller usually, the required space is limited during normal installation, if the sound insulation cover and the exhaust silencer are configured, the installation is difficult in the limited space, and the fan and the matched noise reduction measures thereof can be installed only by enlarging the installation space usually.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned weak point among the prior art, the utility model provides a main technical problem that solves lies in providing a combustion engine housing fan noise reduction system that airs exhaust promptly.
The technical means adopted by the utility model are as follows.
The utility model discloses a noise reduction system of an air exhaust fan of a gas turbine housing.A factory building is externally provided with an air exhaust fan and an air exhaust pipeline 111 which are mutually connected, and the surface of the air exhaust fan is provided with a sound insulation wrapping structure; the air outlet of the air exhaust pipeline 111 is connected with a silencer component, and the silencer component is fixed on the roof of a factory building through a silencer damping device; a silencing elbow 2 is arranged at the turning position of the exhaust pipeline 111, and a plurality of high-frequency filtering modules 23 are arranged inside the silencing elbow 2; and the exhaust duct 111 and the plant wall are provided with a duct damping support 1.
The silencing elbow 2 is a circular elbow, and an air inlet 21 and an air outlet 22 of the silencing elbow 2 are respectively connected to the exhaust pipeline 111 through flanges.
The silencer component mainly comprises an inlet flange 31, an inlet reducing pipe 32 and a silencer body 33 which are fixedly connected, wherein the silencer body 33 is fixedly connected with the large-caliber surface of the inlet reducing pipe 32, and the inlet flange 31 is arranged at the small-caliber position of the inlet reducing pipe 32.
One end and the factory building outer wall body fixed connection of pipeline shock absorber support 1, the linking arm 10 of the other end are through complex bolt, nut and 11 fixed connection of connecting piece in exhaust pipe 111, 11 rings of connecting piece are located on exhaust pipe 111, the bolt passes connecting piece 11 and linking arm 10, and the bolt both ends all set up the nut fixed, two nuts respectively with linking arm 10, connecting piece 11 connect the face between packing rubber slab 12, connecting piece 11 and linking arm 10 be connected and set up rubber vibration isolator 13 between the face, be provided with rubber sleeve 14 in the cavity between connecting piece 11 and the bolt, between connecting piece and the adjacent rubber slab 12.
The bottom of the silencer body is fixedly provided with a channel steel 35, the top of the spring vibration isolator 34 is connected with the channel steel 35 through a screw structure, a rubber pad with the thickness of 9mm and the angle of 60 degrees is additionally arranged at the bottom of the spring vibration isolator 34, and the silencer body is fixed on the top of a factory building through a base.
The sound insulation wrapping structure is a 0.5mm thin lead plate wrapped by 20mm glass wool, and the outer side of the glass wool is wrapped by waterproof cloth.
And the air exhaust pipelines 111 adopt sound insulation air pipes.
The thickness of the rubber plate 12 is 3 ~ 5mm, and the thickness of the rubber vibration isolator 13 is 10 mm.
Therefore, the utility model discloses produced technological effect: 1. the whole small of sound insulation parcel structure, the load is little, 2, the silencer resistance loss who disposes is little, and noise reduction is good, the secondary noise that reducible exhaust pipe and fan produced, 3 combustion engine housing fan noise reduction system of airing exhaust have noise elimination, sound absorption, damping, radiating noise reduction in coordination, the influence of noise reduction, vibration to the environment outside the factory building that can be very big.
Drawings
FIG. 1 is a schematic view of a noise reduction system for an exhaust fan of a gas turbine engine enclosure.
Fig. 2 is a schematic view of the noise reduction measure of the exhaust fan.
Fig. 3A is a schematic view of the damping measures of the exhaust duct.
FIG. 3B is an enlarged view of the circle of the damping measure of the exhaust duct.
Fig. 4 is a schematic view of a muffling elbow.
FIG. 5 is a schematic view of muffler components and shock absorbing measures.
Detailed Description
Please refer to fig. 1, which is a schematic diagram of a noise reduction system of an exhaust fan of a housing of a combustion engine. The utility model discloses a combustion engine housing exhaust fan noise reduction system, at first the exhaust fan adopts the noise reduction measure of "sound insulation housing seals + silencer", and the tight sound insulation parcel of exhaust fan body design is gone into to the factory building roofing through the tuber pipe in exhaust fan air outlet department, designs the elbow in the roofing department (namely exhaust pipe 111 turn), changes the exhaust direction, and the exhaust direction changes the horizontal direction from vertical direction, is convenient for the silencer installation; the air pipe is a sound insulation air pipe, a silencing elbow is designed at the elbow, and a silencer is installed at the exhaust outlet. The wind pipe, the silencing elbow and the joint of the silencer and the wall of the factory building are provided with the damping support, so that the secondary noise generated by vibration is reduced, and the detailed explanation is provided through specific embodiments.
Please refer to fig. 2, which is a schematic view of noise reduction measures of the exhaust fan. Measure of making an uproar of airing exhaust fan is for the tight design sound insulation parcel structure of airing exhaust fan main part surface, and this structure is supported by the steel skeleton, and the material of sound insulation parcel comprises the cotton thin stereotype of 0.5mm of parcel of 20mm glass, can wrap up the waterproof cloth in the cotton outside of glass. This shock-absorbing measure on the one hand, because the heat conductivility of metal is better, can give off partly with the heat of fan body, on the other hand, in summer or south high temperature weather, the parcel scope of the parcel that does adjustment sound insulation parcel is for fan body heat dissipation cooling. This sound insulation parcel mounting means is simple, nimble, can be a slice parcel on fan body usually, to the overhaul of the equipments, and it can freely dismantle, the overhaul of the equipments of being more convenient for. Simultaneously because sound insulation parcel structure's light in weight, thickness are thin, and be close-fitting parcel's mode, so wrap up it at the fan surface of airing exhaust, consequently shared space is little, does not occupy extra space basically, need not set up solitary support steel construction on the fan of airing exhaust, and the sound insulation volume of sound insulation housing can reach more than 25dB simultaneously, has better noise reduction.
Please refer to fig. 4 for a schematic diagram of the muffling elbow. The silencing elbow 2 mainly comprises a flange, a reducing and silencing elbow shell (comprising a silencing elbow panel, a galvanized hole plate, glass wool and the like), a high-pass filtering module 23 and the like. The silencing elbow 2 combines the sound absorption material and the elbow together, which can eliminate the exhaust noise of the fan and change the exhaust direction. In a preferred embodiment of the present invention, the muffling elbow 2 is a circular elbow, and both ends of the circular elbow are provided with a reducing structure and a flange connecting structure, and are fixedly connected to the exhaust duct 111 by a flange. Compared with other elbows, the round elbow has the advantages of small resistance loss, small air flow regeneration noise and poor noise reduction effect, so that a plurality of high-pass filtering modules 23 with larger intervals are added in the elbow, and when noise passes through the elbow, part of sound energy is consumed by multiple reflections in the elbow due to the change of the propagation direction of the elbow; partial acoustic energy is consumed by low-frequency component when passing through the high-frequency filtering module, the noise reduction effect of the round elbow is integrally improved, the volume of the silencing elbow 2 is small, the frequency characteristic is mainly low frequency, and therefore when the silencing elbow is used in combination with other silencers, the silencing elbow has the advantages of good noise reduction effect, flexible and convenient installation, space saving and great superiority.
Please refer to simultaneously and refer to fig. 3A and fig. 3B together, be exhaust pipe shock attenuation measure schematic diagram, exhaust pipe shock attenuation measure local enlarged schematic diagram respectively the utility model discloses a shock attenuation measure mainly install pipeline shock absorber support 1 and silencer damping device, this measure has simple structure, low in manufacturing cost, installation and convenient to use, advantage that shock attenuation effect is obvious the utility model discloses an exhaust pipe shock attenuation measure, pipeline shock absorber support 1 comprises main part bearing structure (mainly contains linking arm 10, connecting piece 11 etc.), rubber sleeve 14, rubber vibration isolator pad 13, rubber slab 12 etc. can be with pipeline shock absorber support 1's one end and factory building external wall fixed connection during the installation, the linking arm 10 of the other end then through the complex bolt, nut and connecting piece 11 fixed connection in exhaust pipe 111, and connecting piece 11 ring locates on exhaust pipe 111, a plurality of bolts pass connecting piece 11 and linking arm 10, the bolt both ends all set up the nut and fix, two nuts respectively with connecting arm 10, the connecting of connecting piece 11 connect the face between the rubber vibration isolator pad 13, simultaneously connecting piece 11 and connecting piece and the adjacent rubber vibration isolator pad 12, the optional rubber slab for use the rubber thickness reduction system is set up between the optional rubber vibration isolation pipe 12, the optional rubber vibration reduction system is available for use this 10, 12 the optional rubber vibration reduction of the second rubber vibration isolation duct is provided with the linking face for the utility model.
Please refer to fig. 5 for a schematic view of the muffler components and the shock absorption measures. The silencer component is mainly fixed on the roof of a factory building through a silencer damping device, and mainly comprises an inlet flange 31, an outlet flange 36, an inlet reducing diameter 32 and a silencer body 33 which are fixedly connected, wherein the silencer body 33 is fixedly connected with the large-caliber surface of the inlet reducing diameter 32, and the inlet flange 31 is arranged at the small-caliber part of the inlet reducing diameter 32 and is fixedly connected to the exhaust pipeline 111. Meanwhile, the outlet flange 36 of the silencer body 33 is fixedly connected with the rain cover 37, and the open end of the rain cover 37 is provided with a pest-proof net 371. In a preferred embodiment of the present invention, the muffler body 33 is a resistive muffler, which is an absorptive muffler. The silencer body 33 has good medium-high frequency silencing performance, and is combined with the silencing elbow 2 for use, so that the noise reduction effect is more prominent. The noise reduction principle is that sound energy is converted into heat energy due to friction and is dissipated when the sound waves are transmitted in the porous sound absorption material, so that the aim of noise reduction is achieved, and in order to improve the high-frequency cut-off frequency of the silencer, the arrangement mode of thin sheets and small intervals is adopted, which is opposite to the high-pass filtering module 23.
Simultaneously, can install silencer damping device between silencer part and factory building roof, this damping device is mainly to add parts such as channel-section steel 35, base 38, spring isolator 34, rubber pad in silencer body bottom, and wherein spring isolator 34 top can be connected through spiro union structure with channel-section steel 35 to add to be 9mm thick, 60 rubber pads in spring isolator 34 bottom, fix the silencer body on the house top of factory through base 38 at last, the utility model discloses muffler damping device's installation can not only play the effect of fixed silencer part, can also effectively reduce the secondary noise that the silencer vibration produced.
Claims (9)
1. The utility model provides a combustion engine housing fan noise reduction system that airs exhaust, factory building set up interconnect's fan and exhaust pipe (111) of airing exhaust outward, its characterized in that:
a sound insulation wrapping structure is arranged on the surface of the air exhaust fan;
the air outlet of the exhaust duct (111) is connected with a silencer component, and the silencer component is fixed on the roof of a factory building through a silencer damping device;
a silencing elbow (2) is arranged at the turning position of the exhaust pipeline (111), and a plurality of high-frequency filtering modules (23) are arranged inside the silencing elbow (2);
and the exhaust duct (111) and the wall of the plant are provided with a duct damping support (1).
2. The combustion engine shroud exhaust fan noise reduction system of claim 1, wherein: the silencing elbow (2) is a circular elbow, and an air inlet (21) and an air outlet (22) of the silencing elbow (2) are respectively connected to the exhaust pipeline (111) through flanges.
3. The combustion engine shroud exhaust fan noise reduction system of claim 1, wherein: the silencer component mainly comprises an inlet flange (31), an inlet reducing pipe (32) and a silencer body (33) which are fixedly connected, the silencer body (33) is fixedly connected with a large-caliber surface of the inlet reducing pipe (32), and the inlet flange (31) is arranged at a small-caliber position of the inlet reducing pipe (32).
4. The combustion engine shroud exhaust fan noise reduction system of claim 1, wherein: the one end and the factory building outer wall body fixed connection of pipeline shock absorber support (1), linking arm (10) of the other end are through complex bolt, nut and connecting piece (11) fixed connection in exhaust pipe (111), exhaust pipe (111) is located to connecting piece (11) ring, the bolt passes connecting piece (11) and linking arm (10), and the bolt both ends all set up the nut fixed, two nuts are respectively with linking arm (10), connecting piece (11) connect between the face packing rubber slab (12), set up rubber vibration isolator (13) between the face of connecting piece (11) and linking arm (10), be provided with rubber sleeve (14) in the cavity between connecting piece (11) and the bolt, between connecting piece and adjacent rubber slab (12).
5. The combustion engine shroud exhaust fan noise reduction system of claim 1, wherein: the utility model discloses a silencer, including silencer body, base (38), spring isolator (34) bottom sets firmly channel-section steel (35), spring isolator (34) top with channel-section steel (35) are through spiro union structural connection, spring isolator (34) bottom has increased the rubber pad that 9mm is thick, the silencer body is fixed in the house top of factory through base (38).
6. The combustion engine shroud exhaust fan noise reduction system of claim 1, wherein: the sound insulation wrapping structure is a 0.5mm thin lead plate wrapped by 20mm glass wool, and the outer side of the glass wool is wrapped by waterproof cloth.
7. The combustion engine shroud exhaust fan noise reduction system of claim 1, wherein: and the air exhaust pipelines (111) are all sound insulation air pipes.
8. The combustion engine shroud exhaust fan noise reduction system of claim 1, wherein: silencer body (33) are through outlet flange (36) and rain-proof cover (37) fixed connection, rain-proof cover (37) open end is provided with fly net (371).
9. The noise reduction system of the exhaust fan of the gas turbine shroud according to claim 4, wherein the thickness of the rubber plate (12) is 3 ~ 5mm, and the thickness of the rubber vibration isolator (13) is 10 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920799278.8U CN209960730U (en) | 2019-05-29 | 2019-05-29 | Noise reduction system for exhaust fan of gas turbine housing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920799278.8U CN209960730U (en) | 2019-05-29 | 2019-05-29 | Noise reduction system for exhaust fan of gas turbine housing |
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| CN209960730U true CN209960730U (en) | 2020-01-17 |
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| CN201920799278.8U Active CN209960730U (en) | 2019-05-29 | 2019-05-29 | Noise reduction system for exhaust fan of gas turbine housing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153817A (en) * | 2021-05-17 | 2021-07-23 | 南京磁谷科技股份有限公司 | Ventilating duct comprehensive noise reduction and elimination structure |
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- 2019-05-29 CN CN201920799278.8U patent/CN209960730U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153817A (en) * | 2021-05-17 | 2021-07-23 | 南京磁谷科技股份有限公司 | Ventilating duct comprehensive noise reduction and elimination structure |
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