HRP20020726A2 - Sound absorber for compressors - Google Patents
Sound absorber for compressors Download PDFInfo
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- HRP20020726A2 HRP20020726A2 HR20020726A HRP20020726A HRP20020726A2 HR P20020726 A2 HRP20020726 A2 HR P20020726A2 HR 20020726 A HR20020726 A HR 20020726A HR P20020726 A HRP20020726 A HR P20020726A HR P20020726 A2 HRP20020726 A2 HR P20020726A2
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- sound absorber
- outlet
- partition
- opening
- chamber
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- 239000006096 absorbing agent Substances 0.000 title claims description 37
- 238000005192 partition Methods 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 9
- 238000005266 casting Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 210000002268 wool Anatomy 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
- F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Materials For Photolithography (AREA)
- Prostheses (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
Izum se odnosi na apsorber zvuka koji je spojen s ispustom za tlak kompresora, kao što je navedeno u širem pojmu zahtjeva 1. Apsorber zvuka iz ovog izuma je prvenstveno, no ne i isključivo, predviđen za uporabu kod vijčanog kompresora i to i kod stacionarnih vijčanih kompresora, kao i kod posebnih vijčanih kompresora, koji su montirani na vozila u silosu. The invention relates to a sound absorber that is connected to the outlet for compressor pressure, as stated in the broader term of claim 1. The sound absorber from this invention is primarily, but not exclusively, designed for use with screw compressors, including stationary screw compressors. compressors, as well as with special screw compressors, which are mounted on vehicles in the silo.
Vijčani kompresori koji služe za komprimiranje plinova, odnosno za proizvodnju komprimiranog zraka imaju raznoliku primjenu u raznolikim tehničkim područjima, npr. snabdijevanje pneumatskih strojeva komprimiranim zrakom, za pneumatski prijenos, pa čak i za pneumatsko pokretanje avionskih mlaznih pogonskih mehanizama. Važno područje primjene predstavljaju vozila u silosu za transport praškastih, odnosno rastresenih sipkih materijala. Vijčani kompresor koji je montiran na vozilo proizvodi potreban tlak zraka za olabavljivanje sipkih materijala u silosu i za pneumatsko raznošenje sipkih materijala. Screw compressors that are used to compress gases, i.e. for the production of compressed air, have a variety of applications in various technical areas, for example supplying pneumatic machines with compressed air, for pneumatic transmission, and even for pneumatic starting of aircraft jet propulsion mechanisms. An important field of application is represented by vehicles in silos for the transport of powdery or dispersed bulk materials. A screw compressor mounted on the vehicle produces the necessary air pressure for loosening the bulk materials in the silo and for pneumatically blowing the bulk materials.
Problem kod ovih i ostalih primjena vijčanih kompresora je taj što nastaje vrlo velika buka, pri čemu je pronađeno da je posebno štetna buka viših frekvencija koja može uzrokovati zdravstvena oštećenja. Zbog toga su potrebne mjere kojima se apsorbira buka i na strani na kojoj se usisava zrak, kao i na strani na kojoj se on komprimira. Za apsorbiranje zvuka na strani kompresora na kojoj se tlači zrak poznati su apsorberi zvuka, koji se u biti sastoje od pravocrtne propusne cijevi koja je na obodu perforirana, a koja je omotana s ovojnicom od materijala koji ublažava buku, kao što je na primjer čelična vuna. Takvi apsorberi zvuka zahtijevaju mnogo prostora, no nemaju optimalan učinak glede uklanjanja buke. Osim toga nedostatak je kada se tlak zraka kojeg je proizveo kompresor, a koji treba služiti za pneumatski prijenos osjetljivih materijala, dolazi u doticaj s labavim materijalom za apsorbiranje zvuka, pri čemu postoji opasnost da čestice materijala koji služi za ublažavanje buke budu povučene, te tako onečiste transportiranu robu. U primjeni s vijčanim kompresorima također su poznati apsorberi zvuka s opterećenom stranom koji su smješteni u plosnatom ormariću, pri čemu je ormarić podijeljen poprečnim stjenkama u komori koja se prozračuje uslijed komprimiranog zraka između ulaznog i ispusnog otvora koji se nalaze na putu strujanja, a koji izgleda poput labirinta, pri čemu je komora također djelomično obložena s materijalom koji apsorbira zvuk. The problem with these and other applications of screw compressors is that they produce a lot of noise, with higher frequency noise found to be particularly harmful and can cause health damage. For this reason, noise-absorbing measures are needed both on the side where the air is sucked in, as well as on the side where it is compressed. Sound absorbers are known for absorbing sound on the side of the compressor where the air is compressed, which essentially consist of a rectilinear permeable tube that is perforated on the periphery, and which is wrapped with an envelope made of noise-reducing material, such as steel wool . Such sound absorbers require a lot of space, but they do not have an optimal effect in terms of noise removal. In addition, the disadvantage is when the air pressure produced by the compressor, which is to be used for the pneumatic transfer of sensitive materials, comes into contact with the loose material for sound absorption, where there is a danger that the particles of the material that serves to reduce the noise will be pulled, and thus contaminate the transported goods. In the application with screw compressors, sound absorbers with the loaded side are also known, which are located in a flat cabinet, the cabinet being divided by transverse walls in a chamber that is ventilated due to the compressed air between the inlet and outlet openings located in the flow path, which looks like a labyrinth, where the chamber is also partially lined with sound-absorbing material.
Zadatak izuma je proizvesti takav apsorber zvuka navedene vrste koji jamči takav plosnati način konstruiranja koji je izuzetno ekonomičan glede iskorištenja prostora, kod kojeg se ne rabe materijali za uklanjanje buke, a pri čemu se posebno učinkovito smanjuje razina buke, posebice u području viših frekvencija. The task of the invention is to produce such a sound absorber of the mentioned type that guarantees such a flat construction method that is extremely economical in terms of space utilization, where no noise removal materials are used, and where the noise level is particularly effectively reduced, especially in the area of higher frequencies.
Rješenje zadatka prema ovom izumu navedeno je u zahtjevu 1. Dolje navedeni zahtjevi odnose se na daljnje pozitivne značajke apsorbera zvuka sukladnog ovom izumu. The solution to the task according to this invention is specified in claim 1. The claims listed below refer to further positive features of the sound absorber according to this invention.
Izvedba izuma pobliže je pojašnjena pomoću crteža. The embodiment of the invention is explained in more detail with the help of drawings.
Slika 1 Nacrt apsorbera zvuka Figure 1 Sound absorber design
Slika 2 Bokocrt apsorbera zvuka Figure 2 Side view of sound absorber
Slika 3 Nacrt apsorbera zvuka sličnog onome na Slici 1, osim što mu je uklonjen poklopac Figure 3 A drawing of a sound absorber similar to the one in Figure 1, except that its cover has been removed
Slika 4 Presjek kroz apsorber zvuka prema crti A-A iz slike 1. Figure 4 Section through the sound absorber according to line A-A from Figure 1.
Slika 5 i 6 Isti prikaz kao i na slikama 3 i 4, promijenjena izvedba apsorbera zvuka Picture 5 and 6 Same view as in pictures 3 and 4, changed design of the sound absorber
Prikazani apsorber zvuka sastoji se od plosnatog kućišta 1 u obliku ormarića s podnom stjenkom 3, pokrovnom stjenkom 5 i obodnim stjenkama 7. U podnoj stjenci nalazi se ulazni otvor 9 koji je predviđen za dopremljeni komprimirani zrak iz kompresora. U pokrovnoj stjenci 5 nalazi se izlazni otvor 11 namijenjen za komprimirani zrak kojem je ublažena buka i to prema ulaznom otvoru 9 bočno pomaknut u blizini bočne stjenke kućišta 1. Na nacrtu je kućište u biti pravokutno, bez obzira na predviđenu izbočinu prema unutrašnjosti 13 koja se nalazi pored izlaznog otvora 11, koja omogućava mjesto za smještanje sigurnosnog ventila 14. The shown sound absorber consists of a flat casing 1 in the form of a cabinet with a floor wall 3, a cover wall 5 and peripheral walls 7. In the floor wall there is an inlet opening 9 which is intended for the delivered compressed air from the compressor. In the cover wall 5, there is an outlet opening 11 intended for compressed air whose noise is reduced, and it is laterally moved towards the inlet opening 9 near the side wall of the housing 1. On the plan, the housing is essentially rectangular, regardless of the projected protrusion towards the interior 13, which located next to the outlet opening 11, which provides a place for the safety valve 14.
Pogodno je da izlazni otvor 11 ima, kako je prikazano, bitno veći poprečni presjek nego ulazni otvor 9. Posebice promjer izlaznog otvora 11 može biti više nego dvostruko veći od promjera ulaznog otvora 9. It is convenient that the outlet opening 11 has, as shown, a significantly larger cross-section than the inlet opening 9. In particular, the diameter of the outlet opening 11 can be more than twice the diameter of the inlet opening 9.
Kućište 1 ima oblik ravnog ormarića odnosno ploče. Pod tim se podrazumijeva da visina kućišta iznosi manje od polovine, odnosno pogodnije manje od jedne trećine širine i/ili duljine kućišta. Housing 1 has the form of a flat cabinet or panel. This means that the height of the housing is less than half, or more conveniently less than one third of the width and/or length of the housing.
Unutrašnjost kućišta 1, koja je opasana podnom stjenkom 3, pokrovnom stjenkom 5, te obodnim stjenkama 7, podijeljena je pregradom 15, koja je paralelna s podnom stjenkom 3 i pokrovnom stjenkom 5, na dvije plosnate komore, naime ulaznu komoru 17 i izlaznu komoru 19. Pregrada 15 ima propusni opseg 21, koji je napravljen od mnogobrojnih otvora ili perforacija koje su gusto poslagane jedne pored drugih, koje povezuju ulaznu komoru 17 s izlaznom komorom 19. Propusni opseg 21 nalazi se bočno postavljen u odnosu na ulazni otvor 9 i izlazni otvor 11, te na suprotnoj strani u odnosu na izlazni otvor 11 i ulazni otvor 9. Izvan propusnog opsega 21 pregrada 15 je nepropusna. Uslijed toga komprimiranom zraku, koji nadolazi na ulazni otvor 9 te koji dolazi do nepropusnog dijela pregrade 15, biva nametnut smjer strujanja koji je od ulaznog otvora 9 paralelan s podnom stjenkom 3 i pregradom 15 preko ulazne komore 17 do propusnog opsega 21, a tada se fino razdvaja kroz male otvore propusnog opsega 21 u izlaznu komoru 19, te tada prolazi duž izlazne komore 19 paralelno s pokrovnom stjenkom 5 i podnom stjenkom 15 do izlaznog otvora 11, te nakon toga izlazi napolje, kao što je naznačeno na Slici 4 pomoću strelice. The interior of the housing 1, which is surrounded by the floor wall 3, the cover wall 5, and the peripheral walls 7, is divided by a partition 15, which is parallel to the floor wall 3 and the cover wall 5, into two flat chambers, namely the inlet chamber 17 and the outlet chamber 19 The partition 15 has a bandwidth 21, which is made of numerous openings or perforations that are densely arranged next to each other, which connect the inlet chamber 17 with the outlet chamber 19. The bandwidth 21 is located laterally in relation to the inlet port 9 and the outlet port 11, and on the opposite side in relation to the outlet opening 11 and the inlet opening 9. Outside the bandwidth 21, the partition 15 is impermeable. As a result, the compressed air, which arrives at the inlet opening 9 and reaches the impermeable part of the partition 15, is forced to flow in a direction that is parallel to the floor wall 3 and the partition 15 from the inlet opening 9 through the inlet chamber 17 to the bandwidth 21, and then finely separates through the small bandwidth openings 21 into the exit chamber 19, and then passes along the exit chamber 19 parallel to the cover wall 5 and the floor wall 15 to the exit opening 11, and then goes outside, as indicated in Figure 4 by the arrow.
Pogodno je da se promjer propusnog opsega 21 kojeg sačinjavaju mali otvori izabere tako da bude što je moguće manji, kako bi se postigla fina raspodjela struje zraka, a samim time i djelotvorno uklanjanje buke. S druge strane otvori ne smiju biti toliko mali da dolazi do začepljena uslijed čestica prašine koje sa sobom nosi komprimirani zrak, odnosno nečeg sličnog. Pogodno je da se promjer malih otvora propusnog opsega 21 nalazi u području od 1 do 10 mm, odnosno pogodnije da iznosi oko 5 mm. Pogodno je da se broj malih otvora koji sačinjavaju propusni opseg 21 u korelaciji s promjerom otvora izabere tako da suma poprečnih presjeka svih otvora, to znači ukupnog propusnog poprečnog presjeka od propusnog opsega 21, bude ista ili veća, pri čemu je pogodnije da bude najmanje dvostruko veća od poprečnog presjeka ulaznog otvora 9. It is convenient that the diameter of the bandwidth 21, which is made up of small openings, is chosen to be as small as possible, in order to achieve a fine distribution of the air flow, and thus effective noise removal. On the other hand, the openings must not be so small that they become clogged due to dust particles carried by the compressed air, or something similar. It is convenient that the diameter of the small apertures of the bandwidth 21 is in the range of 1 to 10 mm, that is, it is more convenient that it is about 5 mm. It is convenient that the number of small openings that make up the bandwidth 21 in correlation with the diameter of the openings is chosen so that the sum of the cross-sections of all the openings, that means the total permeable cross-section of the bandwidth 21, is the same or greater, whereby it is more convenient that it is at least twice larger than the cross-section of the inlet opening 9.
Nadalje, pregrada 15, što se može vidjeti na slici 4, tako je namještena da unutarnja visina izlazne komore 19 bude primjetno veća u odnosu na unutarnju visinu ulazne komore 17. Na primjer, pogodno je da unutarnja visina izlazne komore 19 bude 1,8 do 2,2 puta veća, odnosno pogodnije 2 puta veća od unutarnje visine ulazne komore 17. Uslijed tih konstrukcijskih mjera komprimirani zrak na svom putu od ulaznog otvora 9 preko ulazne komore 17, propusnog opsega 21 i izlazne komore 17, sve do izlaznog otvora 9, nailazi na primjetno veći presjek strujanja. Furthermore, the partition 15, which can be seen in Figure 4, is arranged so that the internal height of the outlet chamber 19 is noticeably greater in relation to the internal height of the inlet chamber 17. For example, it is suitable for the internal height of the outlet chamber 19 to be 1.8 to 2.2 times greater, or more conveniently 2 times greater than the internal height of the inlet chamber 17. Due to these design measures, the compressed air on its way from the inlet opening 9 through the inlet chamber 17, the bandwidth 21 and the outlet chamber 17, all the way to the outlet opening 9, encounters a noticeably larger flow cross-section.
Dio ulazne komore 17, koji se na slikama nalazi desno od ulaznog otvora 9, koji je na slici 4 označen kao 17a, stvara odbojni prostor koji ne leži na putu strujanja komprimiranog zraka, označenog strelicom, od ulaznog otvora 9 do izlaznog otvora 11, no dovodi do nestanka odbojnosti tlačnih vrhova, te može doprinijeti unutarnjim refleksijama zvuka. The part of the inlet chamber 17, which is located to the right of the inlet opening 9 in the figures, which is marked as 17a in Figure 4, creates a repulsive space that does not lie in the path of the flow of compressed air, marked by an arrow, from the inlet opening 9 to the outlet opening 11, but leads to the disappearance of the repulsion of pressure peaks, and can contribute to internal sound reflections.
Pogodno je da kućište 1 apsorbera zvuka bude tako konstruirano da se sastoji od tri uglavnom ravna dijela posložena jedan na drugoga, naime od podne ploče 23 koja tvori podnu stjenku 3, od međudijela 25, koji obuhvaća pregradu 15 i veći dio obodnih stjenci 7, te od pokrovne ploče 27, koja obuhvaća pokrovnu stjenku 5 zajedno s izlaznim otvorom 11. Pogodno je da su ta tri dijela 23, 25 i 27 oblikovani iz aluminija pomoću postupka lijevanja u pješčanom kalupu. Oni leže na horizontalnim veznim rešetkama jedan preko drugoga, a drže se na okupu pomoću vijaka 29, za koje je predviđeno da se nalaze uokolo opsega kućišta u području obodnih stjenci 7. Oko podne stjenke 3, pokrovne stjenke 5 i pregrade 15 koje su dodatno jedna drugom poduprte, predviđene su četiri stupa uokolo ulaznog otvora 9, koji se mogu na primjer pričvrstiti na pregradu 15, te se također mogu protezati pomoću veznih vijaka (nije prikazano). It is convenient for the casing 1 of the sound absorber to be constructed in such a way that it consists of three mostly flat parts stacked on top of each other, namely from the floor plate 23 which forms the floor wall 3, from the intermediate part 25, which includes the partition 15 and most of the peripheral walls 7, and from the cover plate 27, which includes the cover wall 5 together with the exit opening 11. It is convenient that these three parts 23, 25 and 27 are formed from aluminum by means of a casting process in a sand mold. They lie on horizontal connecting grids one above the other, and are held together by means of screws 29, which are intended to be located around the circumference of the housing in the area of the peripheral walls 7. Around the floor wall 3, the cover wall 5 and the partition 15 which are additionally one supported by the other, four posts are provided around the entrance opening 9, which can for example be attached to the partition 15, and can also be extended by means of connecting screws (not shown).
Kotiranje apsorbera zvuka ovog izuma poravnava se prema volumenu strujanja komprimiranog zraka koji proizvodi odgovarajući tip kompresora, a koji se zahtijeva od naknadno spojenog trošila, pri čemu je u prvom redu promjer izlaznog otvora 11 takve veličine da mora odgovarati zadanim okvirima. Kod danog promjera izlaznog otvora 11, pogodno je da unutarnja visina ulazne komore 17 bude od 0,2 do 0,3 puta veća, pogodnije 0,25 puta veća od tog promjera. Također se može odabrati stanovito konkretno dimenzioniranje, jer kod visoke apsorpcija zvuka kojoj se teži, otpor strujanja apsorbera zvuka treba biti što je moguće niži. The dimensioning of the sound absorber of this invention is aligned according to the volume of compressed air flow produced by the corresponding type of compressor, which is required from the subsequently connected consumer, whereby the diameter of the outlet opening 11 is first of all such a size that it must correspond to the given frames. With a given diameter of the outlet opening 11, it is suitable for the internal height of the inlet chamber 17 to be 0.2 to 0.3 times greater, more preferably 0.25 times greater than that diameter. A certain concrete dimensioning can also be chosen, because with the high sound absorption that is aimed for, the flow resistance of the sound absorber should be as low as possible.
Ustanovljeno je da se može postići djelotvorno smanjenje izlazne buke kod vijčanog kompresora pomoću opisane konstrukcije apsorbera zvuka, pri čemu je moguće smanjenje buke od na primjer 110 dB u području od 80 dB. Nadalje, apsorber zvuka iz ovog izuma posebice je pogodan uslijed svoje ravnog oblika koji ekonomično rabi prostor za primjenu kod vijčanih kompresora, koji se moraju ugraditi u ograničenim prostornim uvjetima, npr. vozilima u silosu. Apsorber zvuka iz ovog izuma može se postaviti izravno na vijčane kompresore moderne konstrukcije, pri čemu ulazni otvor 9 apsorbera zvuka može priključiti neposredno na tlačni ispust kompresora. Apsorber zvuka iz ovog izuma napravljen je od materijala otpornog na koroziju, pri čemu je pogodno da to bude aluminijski lijev, pri čemu je zbog niže gustoće i uslijed toga većeg otpora toplinskog prolaza postupak lijevanja aluminija u pješčane kalupe pogodniji nego tlačni lijev. U njemu uopće nema slabo pričvršćenih umetnutih izolatora kao što su staklena vuna, rudna vuna, “Metallgestrick” ili slično, koji se uobičajeno rabe kod ostalih apsorbera zvuka. Stoga je apsorber zvuka iz ovog izuma posebno pogodan za uporabu kod vijčanih kompresora s pneumatskim prijenosom osjetljive robe, s obzirom da ne postoji nikakva mogućnost kontaminacije transportirane robe pomoću korodiranih čestica ili čestica izolatora koje su slabo pričvršćene. Čak je i težina apsorbera zvuka iz ovog izuma manja nego kod uobičajenih apsorbera zvuka. It has been found that an effective reduction of the output noise of the screw compressor can be achieved by means of the described construction of the sound absorber, whereby a noise reduction of, for example, 110 dB in the range of 80 dB is possible. Furthermore, the sound absorber from this invention is particularly suitable due to its flat shape that economically uses space for use with screw compressors, which must be installed in limited space conditions, for example vehicles in a silo. The sound absorber of this invention can be placed directly on screw compressors of modern design, whereby the inlet opening 9 of the sound absorber can be connected directly to the pressure outlet of the compressor. The sound absorber of this invention is made of a corrosion-resistant material, preferably an aluminum casting, and due to its lower density and the resulting higher thermal resistance, the process of casting aluminum in sand molds is more suitable than pressure casting. There are no weakly attached inserted insulators such as glass wool, mineral wool, "Metallgestrick" or the like, which are commonly used in other sound absorbers. Therefore, the sound absorber of this invention is particularly suitable for use with screw compressors with pneumatic conveying of sensitive goods, since there is no possibility of contamination of the transported goods by means of corroded particles or insulator particles that are poorly attached. Even the weight of the sound absorber of this invention is less than that of conventional sound absorbers.
Smatra se, pri čemu ovo mišljenje kojim se objašnjava izum ne treba biti važno odnosno obvezatno odnosno ograničavajuće, da ustanovljeno izvrsno djelovanje apsorbera zvuka iz ovog izuma kojim se uklanja buka počiva većinom na refleksijama, koje se prostiru okomito na put širenja zraka i dolaze do skrenutih unutarnjih površina apsorbera zvuka, te su usmjerene suprotno smjeru strujanja. Ove refleksije, zajedno s promjenjivim brzinama strujanja koje su uzrokovane uslijed različitih strujnih poprečnih presjeka u pojedinim područjima komore, dovode do širokopojasnog suzbijanja zvučne rezonancije koju je proizvela emisija zvuka u cjelokupnom nastalom frekvencijskom području. It is considered, while this opinion explaining the invention should not be important or mandatory or limiting, that the established excellent performance of the sound absorber from this invention, which removes noise, rests mostly on reflections, which extend perpendicular to the path of air propagation and reach deflected internal surfaces of the sound absorber, and are directed against the flow direction. These reflections, together with variable flow velocities caused by different current cross-sections in certain areas of the chamber, lead to broadband suppression of sound resonance produced by sound emission in the entire resulting frequency range.
Slike 5 i 6 prikazuju modificiranu izvedbu apsorbera zvuka iz ovog izuma, pri čemu se modifikacijom namjerava poboljšati pojavljivanje prethodno opisanih refleksija. To se postiže pomoću jedne ili više stjenki na kojima se odvija refleksija, koji se prostiru kroz izlaznu komoru 19 poprijeko u odnosu na put strujanja zraka, pri čemu svaka stjenka na kojoj se odvija refleksija ima jedan ili više prolaznih otvora kroz koje se propušta zrak. Figures 5 and 6 show a modified performance of the sound absorber of the present invention, whereby the modification is intended to improve the occurrence of the previously described reflections. This is achieved by means of one or more walls on which the reflection takes place, which extend through the outlet chamber 19 transversely in relation to the path of the air flow, whereby each wall on which the reflection takes place has one or more through openings through which air is passed.
Kod izvedbe prikazane na slikama 5 i 6 nadolazeći zrak u propusnom opsegu 21 u izlaznoj komori 19 prilikom strujanja nailazi kod izlaznog otvora 11 najprije na pregradu na kojoj se odvija refleksija 35, koja na oba svoja kraja ima propusne otvore 39. U smjeru strujanja iza prve stjenke na kojoj se odvija refleksija 35 nalazi se druga stjenka na kojoj se odvija refleksija 37, koja je po prilici na sredini prelomljena s propusnim otvorom 41. In the version shown in Figures 5 and 6, the incoming air in the bandwidth 21 in the outlet chamber 19, during its flow, encounters at the outlet opening 11 first the partition where the reflection 35 takes place, which has permeable openings 39 at both ends. In the direction of the flow behind the first the wall on which reflection 35 takes place, there is another wall on which reflection 37 takes place, which is probably broken in the middle with a permeable opening 41.
Važno je da propusni otvori 39 prve stjenke na kojoj se odvija refleksija 35 te najmanje jedan propusni otvor 41 druge stjenke na kojoj se odvija pregrada budu postavljeni jedno nasuprot drugome, tako da zrak bude prisiljen kretati se po vijugavom putu strujanja. Poprečni presjek propusnih otvora 39 prve stjenke na kojoj se odvija refleksija 35 i/ili propusni otvor 41 druge pregrade na kojoj se odvija refleksija 37 je prvenstveno jednako velik ili veći od poprečnog presjeka ulaznog otvora 9. It is important that the permeable openings 39 of the first wall on which the reflection 35 takes place and at least one permeable opening 41 of the second wall on which the partition takes place are placed opposite each other, so that the air is forced to move along a winding flow path. The cross-section of the transmissive openings 39 of the first wall on which the reflection 35 takes place and/or the transmissive opening 41 of the second partition on which the reflection 37 takes place is primarily equal to or larger than the cross-section of the entrance opening 9.
Claims (8)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10011023A DE10011023A1 (en) | 2000-03-07 | 2000-03-07 | Silencer for direct fitting on pressure outlet of screw compressor has housing of flat box shape with inlet aperture in base wall and outlet aperture in cover wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| HRP20020726A2 true HRP20020726A2 (en) | 2003-12-31 |
Family
ID=7633800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HR20020726A HRP20020726A2 (en) | 2000-03-07 | 2002-09-05 | Sound absorber for compressors |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1261805A1 (en) |
| CZ (1) | CZ20022795A3 (en) |
| DE (1) | DE10011023A1 (en) |
| HR (1) | HRP20020726A2 (en) |
| PL (1) | PL357436A1 (en) |
| WO (1) | WO2001066946A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20301721U1 (en) | 2003-02-04 | 2004-06-09 | Riese, Wolfgang | Hot gas silencer |
| DE202004002341U1 (en) * | 2004-02-13 | 2004-05-19 | Schübler Fahrzeugtechnik GmbH | Supply unit arrangement for a motor vehicle |
| CN100458155C (en) * | 2005-05-23 | 2009-02-04 | 比泽尔制冷设备有限公司 | Refrigerant compressor |
| DE102005029760A1 (en) | 2005-05-23 | 2006-11-30 | Bitzer Kühlmaschinenbau Gmbh | Refrigerant compressor |
| DE102006044821B4 (en) * | 2006-09-14 | 2015-09-24 | Halla Visteon Climate Control Corporation | Refrigerant compressor with silencer for air conditioners |
| DE102007011455A1 (en) * | 2007-03-09 | 2008-09-11 | Festo Ag & Co. | Compressed air silencers for pneumatic applications |
| DE102013206343A1 (en) * | 2013-04-10 | 2014-10-16 | Bitzer Kühlmaschinenbau Gmbh | Refrigerant compressor |
| US10830239B2 (en) | 2015-08-11 | 2020-11-10 | Carrier Corporation | Refrigeration compressor fittings |
| CN107850071B (en) | 2015-08-11 | 2021-01-22 | 开利公司 | Screw compressor economizer plenum for pulsation reduction |
| WO2017058369A1 (en) * | 2015-10-02 | 2017-04-06 | Carrier Corporation | Screw compressor resonator arrays |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1163568B (en) * | 1962-12-06 | 1964-02-20 | Danfoss As | Silencer composed of preformed sheet metal parts |
| US3968854A (en) * | 1975-03-18 | 1976-07-13 | Briggs & Stratton Corporation | Low noise level muffler for small engines |
| JPS5277939A (en) * | 1975-12-24 | 1977-06-30 | Toyota Motor Corp | Muffler with afterburning preventor |
| DE2650364A1 (en) * | 1976-11-03 | 1978-05-11 | Leistritz Hans Karl | Ceramic insert plate in exhaust of other silencer - has part perforated by narrow ducts and solid part facing entry orifice in enclosure |
| DE9203857U1 (en) * | 1992-03-23 | 1992-05-14 | ABB Patent GmbH, 6800 Mannheim | Refrigeration system |
| TW384349B (en) * | 1998-01-14 | 2000-03-11 | Emitec Emissionstechnologie | Catalytic converter for a muffler of a small engine |
| DE19834822A1 (en) * | 1998-08-01 | 2000-02-03 | Stihl Maschf Andreas | Exhaust silencer with a catalytic converter |
-
2000
- 2000-03-07 DE DE10011023A patent/DE10011023A1/en not_active Withdrawn
-
2001
- 2001-03-07 PL PL01357436A patent/PL357436A1/en unknown
- 2001-03-07 EP EP01911749A patent/EP1261805A1/en not_active Withdrawn
- 2001-03-07 WO PCT/EP2001/002578 patent/WO2001066946A1/en not_active Application Discontinuation
- 2001-03-07 CZ CZ20022795A patent/CZ20022795A3/en unknown
-
2002
- 2002-09-05 HR HR20020726A patent/HRP20020726A2/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CZ20022795A3 (en) | 2003-02-12 |
| EP1261805A1 (en) | 2002-12-04 |
| PL357436A1 (en) | 2004-07-26 |
| DE10011023A1 (en) | 2001-09-13 |
| WO2001066946A1 (en) | 2001-09-13 |
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