NO133525B - - Google Patents
Download PDFInfo
- Publication number
- NO133525B NO133525B NO1460/71A NO146071A NO133525B NO 133525 B NO133525 B NO 133525B NO 1460/71 A NO1460/71 A NO 1460/71A NO 146071 A NO146071 A NO 146071A NO 133525 B NO133525 B NO 133525B
- Authority
- NO
- Norway
- Prior art keywords
- fan wheel
- fitting
- fans
- casing
- gap
- Prior art date
Links
- 239000000126 substance Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K30/00—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs
- A23K30/10—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs of green fodder
- A23K30/15—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs of green fodder using chemicals or microorganisms for ensilaging
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K30/00—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs
- A23K30/10—Processes specially adapted for preservation of materials in order to produce animal feeding-stuffs of green fodder
- A23K30/12—Dehydration
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Food Science & Technology (AREA)
- Animal Husbandry (AREA)
- Zoology (AREA)
- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Fodder In General (AREA)
Description
Anordning ved vifter for transport av gassformige medier inneholdende ildsfarlige stoffer. Device for fans for the transport of gaseous media containing flammable substances.
Denne oppfinnelse vedrører en anordning ved vifter for transport av gassformige medier, inneholdende ildsfarlige stoffer, hvilke vifter består av et på en aksel anbragt viftehjul av sentrifugal- eller pro-pelltypen med en omgivende kappe resp. festering. This invention relates to a device for fans for the transport of gaseous media containing flammable substances, which fans consist of a fan wheel of the centrifugal or propeller type mounted on an axle with a surrounding jacket or celebration.
De her nevnte arbeidsforhold forekom-mer ofte i tørker og anlegg for utsugning av gasser med den nevnte betingelse. Der foreligger alltid en stor risiko for eksplo-sjon og brann ved at gassen antennes av en gnist oppstått ved en utilsiktet friksjon mellom et roterende og et stillestående element. Den spalte som ved montering alltid anordnes mellom begge de nevnte elementer, kan nemlig ved forskyvninger — avhen-gig av varmeutvidelse eller av andre årsa-ker — ofte reduseres så at elementene spo-radisk eller kontinuerlig kommer i kontakt med hverandre. For å eliminere denne risiko har man hittil ved sådanne arbeidsforhold utført viftehjulet av et mykere metall f. eks. aluminium for å unngå gnistdannel-se. Det har imidlertid vist seg at den nevnte forsiktighetsregel ikke helt kan eliminere risikoen for antennelse, ettersom ved det nevnte metall langvarig kontakt ved frik-sjonen kan bringes til en temperatur som er tilstrekkelig høy til å antenne gassen. The working conditions mentioned here often occur in dryers and facilities for the extraction of gases with the aforementioned condition. There is always a great risk of explosion and fire when the gas is ignited by a spark caused by accidental friction between a rotating and a stationary element. The gap which during assembly is always arranged between both of the aforementioned elements can, in the event of displacements — depending on thermal expansion or for other reasons — often be reduced so that the elements sporadically or continuously come into contact with each other. In order to eliminate this risk, the fan wheel has so far been made of a softer metal in such working conditions, e.g. aluminum to avoid sparks. However, it has been shown that the aforementioned rule of caution cannot completely eliminate the risk of ignition, as with the aforementioned metal prolonged contact by friction can bring a temperature sufficiently high to ignite the gas.
Oppfinnelsen som går ut på helt å eliminere den nevnte risiko, utmerker seg ved at en roterende eller en stillestående del på hver side av den spalte, som normalt finnes mellom viftehjulet og kappens inn-løpskonus resp. viftehjulet og festeringen samt mellom den nevnte kappe og akselen, er forsynt med et utskiftbart beslag av et materiale med så lav smeltepunktstemperatur, at beslaget ved friksjon ved eventuelt inntreffende berøring smelter for anten-nelsestemperaturen for det ildsfarlige stoff i gassen er nådd. The invention, which aims to completely eliminate the mentioned risk, is distinguished by the fact that a rotating or a stationary part on each side of the gap, which is normally found between the fan wheel and the casing's inlet cone resp. the fan wheel and the fastening ring as well as between the aforementioned casing and the shaft, is provided with a replaceable fitting made of a material with such a low melting point temperature that the fitting melts due to friction in the event of contact before the ignition temperature for the flammable substance in the gas is reached.
Oppfinnelsen skal nærmere forklares i tilslutning til tegningen som viser to vifte-typer for oppfinnelsens anvendelse. The invention shall be explained in more detail in connection with the drawing which shows two fan types for the application of the invention.
Fig. 1 viser en propellvifte og fig. 2 en Fig. 1 shows a propeller fan and fig. 2 one
sentrifugalvif te. centrifugal fan.
1 betegner en aksel som bærer viftehjulet 2 resp. 2'. 3 betegner en i en vegg-åpning 7 anbragt ramme, såkalt festering. 4 betegner en viftekappe som omgir sentri-fugalviftehjulet "'. 5a betegner en spalte med passende bredde mellom propellvifte-hjulet 2 og festeringen 3. Ved utførelsen ifølge fig. 2 finnes der en tilsvarende spalte 5b mellom viftehjulet 2' og kappens inn-løpskonus 6. Lignende spalter er også anordnet mellom akselen og det omgivende element. De er på tegningen betegnet med 5a' resp. 5b'. I henhold til oppfinnelsen skal enten på dat faste eller på det bevegelige element på begge sider av disse spalter væ-re anordnet et utskiftbart beslag av et materiale med så lav smeltepunkttempera-tur at beslaget ved friksjon smelter før an-tennelsestemperaturen for det ildsfarlige stoff i gassen er nådd. Ved propellvifter kan dette beslag således anbringes på festerin-gens innside eller på skovelbladenes spis-ser. Ved utførelsen ifølge fig. 2 utføres beslaget hensiktsmessig som en indre del 6a av innløpskonusen. Ved spaltene omkring vifteakselen 1 utføres dette beslag med for-del i form av en særskilt tetningskonus 8a resp. 8b. Oppfinnelsen som hovedsakelig er beregnet på å anvendes ved vifter, kan na-turligvis også komme til anvendelse for å 1 denotes a shaft that carries the fan wheel 2 or 2'. 3 denotes a frame placed in a wall opening 7, so-called fixing ring. 4 denotes a fan shroud that surrounds the centrifugal fan wheel "'. 5a denotes a gap of suitable width between the propeller fan wheel 2 and the fastening ring 3. In the embodiment according to Fig. 2, there is a corresponding gap 5b between the fan wheel 2' and the shroud's inlet cone 6 . Similar gaps are also arranged between the axle and the surrounding element. They are denoted in the drawing by 5a' and 5b' respectively. According to the invention, either on the fixed or on the movable element on both sides of these gaps are arranged a replaceable attachment made of a material with such a low melting point temperature that the attachment melts due to friction before the ignition temperature for the flammable substance in the gas is reached. In the case of propeller fans, this attachment can thus be placed on the inside of the attachment ring or on the tips of the blade blades. in the embodiment according to Fig. 2, the fitting is conveniently made as an inner part 6a of the inlet cone. At the slots around the fan shaft 1, this fitting is advantageously made in the form of a special sealing cone 8a or 8b. The invention, which is mainly intended for use with fans, can of course also be used for
eliminere antennelsesrisikoen ved andre roterende elementer som omgis av stillestående, normalt ved en spalte fra det roterende element adskilte stasjonære element. eliminate the risk of ignition by other rotating elements that are surrounded by stationary elements, normally separated from the rotating element by a gap from the stationary element.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702019972 DE2019972A1 (en) | 1970-04-24 | 1970-04-24 | Prewilting of forage plants |
GB1131871 | 1971-04-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO133525B true NO133525B (en) | 1976-02-09 |
Family
ID=25759014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO1460/71A NO133525B (en) | 1970-04-24 | 1971-04-20 |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT309197B (en) |
CH (1) | CH556642A (en) |
DE (1) | DE2019972A1 (en) |
GB (1) | GB1339033A (en) |
NO (1) | NO133525B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4042716A (en) * | 1974-03-16 | 1977-08-16 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Preservative for fodder, mixed fodder and silage |
US4034117A (en) * | 1975-11-06 | 1977-07-05 | Food Technology Products | Process for preparing forage crop animal feeds |
US5082675A (en) * | 1989-07-29 | 1992-01-21 | Bp Chemicals Limited | Ensiling composition |
DE19719412A1 (en) * | 1997-03-21 | 1998-09-24 | Basf Ag | Solutions from propionic acid, ammonia, propanediol and water and their use |
CZ329799A3 (en) | 1997-03-21 | 1999-12-15 | Basf Aktiengesellschaft | Solution and use thereof |
BRPI0902564A2 (en) * | 2009-08-17 | 2011-05-03 | Auster Nutricao Animal Ltda | composed of 1 monopropionine and its isomer 3 monopropionine as preservatives of animal feed, grain and flour |
-
1970
- 1970-04-24 DE DE19702019972 patent/DE2019972A1/en active Pending
-
1971
- 1971-04-20 NO NO1460/71A patent/NO133525B/no unknown
- 1971-04-23 AT AT351771A patent/AT309197B/en not_active IP Right Cessation
- 1971-04-23 CH CH595271A patent/CH556642A/en not_active IP Right Cessation
- 1971-04-26 GB GB1131871*[A patent/GB1339033A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AT309197B (en) | 1973-08-10 |
GB1339033A (en) | 1973-11-28 |
DE2019972A1 (en) | 1971-11-04 |
CH556642A (en) | 1974-12-13 |
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