SI22894A - Rotor of centrifugal turbomachine - Google Patents
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- SI22894A SI22894A SI200800232A SI200800232A SI22894A SI 22894 A SI22894 A SI 22894A SI 200800232 A SI200800232 A SI 200800232A SI 200800232 A SI200800232 A SI 200800232A SI 22894 A SI22894 A SI 22894A
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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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/167—Operating by means of fibrous or porous elements, e.g. with sponge rotors
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Abstract
Description
ROTOR CENTRIFUGALNEGA TURBOSTROJAROTOR OF CENTRIFUGAL TURBOSTROY
Predmet izuma je nova konstrukcija rotorja centrifugalnega turbostroja, na primer puhala, črpalke, ventilatorja, ki generira tlačno razliko in volumski pretok fluida.The object of the invention is a new design of a rotor of a centrifugal turbo machine, for example a blower, pump, fan, which generates a pressure difference and a fluid volume flow.
Tehnični problemA technical problem
Tehnični problem, ki ga izum rešuje, je kako konstruirati in izdelati rotor centrifugalnega turbostroja, ki bo zagotavljal čim nižji hrup brez diskretnih frekvenc pri majhnih volumskih pretokih fluida, visok izkoristek v čim širšem področju volumskega pretoka ter enakomeren tok fluida brez tlačnih pulzacij.A technical problem solved by the invention is how to design and manufacture a rotor of a centrifugal turbo machine that will provide the lowest possible noise without discrete frequencies at low volume flow rates, high efficiency over a wide volume flow range and a steady flow of fluid without pressure pulsations.
Znano stanje tehnikeThe prior art
Običajno so rotorji centrifugalnih turbostrojev sestavljeni iz pesta - zadnje stene, ki je pritrjena na gred turbostroja in sprednje stene ter med njima po obodu razporejenih lopatic, preko katerih se prenaša moment iz rotorja motorja na gnani fluid na primer tekočino, to je plin ali kapljevino. Pri polodprtih rotorjih zgornje stene ni, tesnjenje je izvedeno z majhno režo med rotorjem in pokrovom turbostroja. Skupna lastnost delovnih centrifugalnih turbostrojev je, da se dovedeno mehansko delo preko rotor skih lopatic prenaša v stagnacij ski porast tlaka in odnosno povečanje entalpije medija.Typically, the rotors of the centrifugal turbo machines consist of a hub - a rear wall that is attached to the shaft of the turbo machine and the front wall, and between them, circumferentially arranged blades, through which the moment from the motor rotor to the driven fluid, such as gas or liquid, is transferred. In the case of semi-open upper wall rotors, there is no sealing, with a small gap between the rotor and the turbo cover. A common feature of working centrifugal turbo machines is that the mechanical work brought through the impeller blades is transferred to a stagnant increase in pressure and, respectively, an increase in the enthalpy of the medium.
Rotorske lopatice torej zagotavljajo osnovno funkcijo puhala, to je prenos energije na fluid, vendar pri tem prenosu prihaja do nekaterih fenomenov, ki so nezaželeni. Tlak na eni strani lopatice je višji, kot tlak na drugi strani, kar povzroča pulzacije v izstopnem toku fluida ter povišan hrup. Pojav »blade passinga« je izrazit pri uporabi lopatičnega difuzorja, ki se uporablja za zmanjševanje kinetične energije fluida in s tem za povečevanje statičnega tlaka. Interakcija med gibajočo lopatico rotorja in mirujočo lopatico statorja povzroči tlačni sunek in s tem generacijo hrupa z izrazito diskretno frekvenco. Ta efekt so v številnih patentih poskušali znižati ali vsaj omiliti, kot je npr. opisano v patentnih dokumentih US6166462, GB656430, FR2780454, US5340275, US4174020, US4279325, US005454690A, SI21831A, SI21778A2 itd.Rotor blades therefore provide the basic function of the blower, that is, the transfer of energy to the fluid, but this transfer gives rise to some phenomena that are undesirable. The pressure on one side of the blade is higher than the pressure on the other, causing pulsations in the fluid outflow and increased noise. The phenomenon of "blade passing" is pronounced when using a blade diffuser, which is used to reduce the kinetic energy of the fluid and thereby to increase the static pressure. The interaction between the moving rotor blade and the stationary stator blade results in a pressure drop and thus a noise generation with a pronounced discrete frequency. This effect has been attempted in many patents to reduce, or at least mitigate, such as e.g. described in patent documents US6166462, GB656430, FR2780454, US5340275, US4174020, US4279325, US005454690A, SI21831A, SI21778A2, etc.
-2Pri delovanju turbostroja izven optimalne točke zaradi neugodne usmeritve toka fluida na lopatico rotorja prihaja do odlepljanja toka in recirkulacije, kar zmanjšuje izkoristek in generira tako koherentne vrtinčne strukture v specifičnih frekvenčnih področjih kot tudi širokopasoven turbulenten hrup. Pri ekstremno nizkih pretokih prihaja do zastojnih vrtincev in celo povratnega toka ter posledično do pulzacij toka zraka in tudi do 10-20dB povišanega hrupa glede na optimalno točko delovanja turbostroja.-2With the operation of the turbo machine beyond the optimum point, due to the unfavorable flow direction of the fluid on the rotor blade, current flow and recirculation are detached, which reduces the efficiency and generates both coherent eddy structures in specific frequency ranges and broadband turbulent noise. Extremely low flows result in stagnant vortices and even backflow and, consequently, air flow pulsations and up to 10-20dB of increased noise relative to the optimum operating point of the turbo machine.
Nikola Tesla v patentu US 1061142 opisuje inovativen pristop prenosa energije, ki ne poteka preko rotorskih lopatic temveč preko mejne plasti vzporednih korotirajočih diskov. Princip je uporaben tako za puhala, turbine in črpalke. Prednosti naprave je odsotnost diskretnih frekvenc v spektru hrupa, robustnost in enostavnost stroja, možnost uporabe pri fluidih z visoko viskoznostjo, abrazivnimi delci ali pri ne-Newtnonijevskih fluidih. Izkoristek prenosa energije med diski je relativno visok, do visokih izgub pa prihaja na izstopu in vstopu v rotor. Skupni izkoristek aerodinamičnega dela turbostroja ne presega 60% in zelo hitro pade izven optimalne točke delovanja, zato do širše komercialne uporabe omenjene rešitve ni prišlo.Nikola Tesla, in US Pat. No. 1061142, describes an innovative approach to energy transfer, not through rotor blades but through the boundary layer of parallel rotating disks. The principle is applicable to both blowers, turbines and pumps. The advantages of the device are the absence of discrete frequencies in the noise spectrum, the robustness and ease of the machine, the possibility of use with high viscosity fluids, abrasive particles or non-Newtnoni fluids. The efficiency of transferring energy between disks is relatively high, with high losses occurring at the outlet and inlet of the rotor. The overall efficiency of the aerodynamic part of the turbo machine does not exceed 60% and falls very short of the optimum operating point, so no widespread commercial use of the solution was made.
Naloga in cilj izuma je takšna konstrukcija rotorja centrifugalnega turbostroja, ki ne bo ustvarjal tlačne razlike na obeh straneh lopatice in bo s tem odpadel eden od mehanizmov nastajanja hrupa, pri uporabi skupaj z difuzorjem ne bo prihajalo do »blade passinga«, recirkulacija toka in zastojni vrtinci ne bodo prisotni, visok izkoristek bo dosežen v širšem območju pretokov, izstopni tok fluida bo enakomeren, brez tlačnih pulzacij, hrup bo širokopasoven oz. t.i. »beli šum« brez pojava diskretnih frekvenc.The object and object of the invention is to design a rotor of a centrifugal turbo machine, which will not create a pressure difference on both sides of the blade and thus will eliminate one of the mechanisms of noise generation, when used with the diffuser will not lead to "blade passing", recirculation and stalling vortices will not be present, high efficiency will be achieved over a wider flow range, fluid outflow will be steady, no pressure pulsations, noise will be broadband or i.e. "White noise" without discrete frequencies.
Naloga je rešena z rotorjem centrifugalnega turbostroja po neodvisnem patentnem zahtevku.The task is solved by the rotor of a centrifugal turbo machine according to an independent claim.
Opis izumaDescription of the invention
Izum bo opisan na osnovi izvedebenih primerov in slik, ki prikazujejo:The invention will be described on the basis of embodiments and figures showing:
Slika 1: naris in prerez izvedbenega primera rotorja po izumu,Figure 1: an outline and cross-section of a rotor embodiment of the invention,
Slika 2: izvedbeni primer rotorja, delno zapolnjenega z poroznim materialom, Slika 3: fotografija strukture odprto-celičnega poroznega materiala,Figure 2: Exemplary example of a rotor partially filled with porous material Figure 3: Photograph of the structure of an open-cell porous material,
Slike 4a do 4g: različne izvedbe periodičnega celičnega materiala.Figures 4a through 4g: Different embodiments of periodic cellular material.
-3Na sliki 1 je prikazan izvedbeni primer nove konstrukcija rotorja centrifugalnega turbostroja, kjer se energija iz rotorja 1 na gnani fluid ne prenaša preko rotorskih lopatic, temveč preko rotirajoče strukture poroznega materiala 2. Porozni material 2, s katerim je delno ali v celoti zapolnjen rotor 1 turbostroja, je mehansko zadosti trden visoko porozni material z odprto celično strukturo. Fotografija takega materiala je na sliki 3. Porozni material 2 je prednostno vstavljen med spodnjo steno ali pesto 3 in zgornjo steno 4, tako da tok fluida v aksialni smeri ni mogoč. Rotorje pritrjen na gred motorja, prednostno elektromotorja, in se vrti okoli osi 5. Fluid v rotor vstopa v aksialno v smeri 6 in izstopa radialno v smeri 7.-3Figure 1 shows an embodiment of a new centrifugal turbo rotor design, where energy from the rotor 1 to the driven fluid is not transmitted through the rotor blades but through the rotating structure of the porous material 2. The porous material 2 which partially or completely fills the rotor 1 turbo machine, is a mechanically sufficient solid, highly porous material with an open cell structure. A photo of such material is shown in Figure 3. Porous material 2 is preferably inserted between the lower wall or hub 3 and the upper wall 4 so that fluid flow in the axial direction is not possible. The rotors are attached to the motor shaft, preferably the electric motor, and rotate about axis 5. Fluid enters the rotor axially in direction 6 and exits radially in direction 7.
Rotor po izumu je torej sestavljen iz pesta oziroma zadnje stene, ki je pritrjena na gred turbostroja in sprednje stene ter je med njima struktura poroznega materiala, preko katerega se prenaša moment iz rotorja motorja na gnani fluid. Pri polodprtih rotorjih sprednje stene ni, tesnjenje je izvedeno z majhno režo med rotorjem in pokrovom puhala. Struktura poroznega materiala zapolnjuje v radialni smeri od vrtišča proti obodu vsaj del rotorja in to do oboda rotorja.The rotor according to the invention therefore consists of a hub or a rear wall that is attached to the turbo machine shaft and the front wall, and between them is a structure of porous material through which torque is transmitted from the motor rotor to the driven fluid. In the case of semi-open front wall rotors, there is no sealing, with a small gap between the rotor and the blower cover. The structure of the porous material fills at least part of the rotor in the radial direction from the pivot towards the perimeter and to the perimeter of the rotor.
Po izumu je lahko struktura poroznega materiala izdelana v enem kosu ali kot sestav iz več sestavnih delov poljubnih oblik. Prav tako je struktura poroznega materiala izdelana poljubne oblike, npr. kot vstopno ustje v obliki lopatic, kontura zgornje ali spodnje stene je lahko paraboličnega ali drugačnega prereza.According to the invention, the structure of the porous material can be made in one piece or as an assembly of several components of any shape. Likewise, the structure of the porous material is made of any shape, e.g. as an inlet mouth in the form of blades, the contour of the upper or lower wall may be parabolic or otherwise cross-section.
Porozni material je sestavljen iz trdnine, prednostno kovine, polimera ali keramike. Poroznost omogoča pretok fluida, prednostno plina ali kapljevine. Gostota poroznega materiala je prednostno med 5% in 30% gostote trdnine. Porozni materiali z večjo gostoto imajo običajno višjo mehansko trdnost, vendar so tudi tlačne izgube pri pretoku fluida ustrezno večje. Pri izbiri materiala je potrebno poiskati kompromis med mehansko trdnostjo in pretočnimi izgubami. Porozni material prikazan na sliki 3 ima odprto celično strukturo, kar pomeni, da so pore v materialu medsebojno povezane, zato je prepusten za tok fluida. Porozni material ima povprečni premer celic med 0.1 in 20 mm, prednostno med 1 in 4 mm. Omenjeni materiali zaradi razvoja ustreznih proizvodnih tehnologij postajajo čedalje bolj tržno zanimivi.The porous material consists of a solid, preferably metal, polymer or ceramic. Porosity allows the flow of fluid, preferably gas or liquid, to flow. The density of the porous material is preferably between 5% and 30% of the density of the solid. Higher density porous materials typically have higher mechanical strength, but also the compression losses in fluid flow are correspondingly higher. When choosing a material, a trade-off between mechanical strength and flow losses must be sought. The porous material shown in Figure 3 has an open cellular structure, which means that the pores in the material are interconnected and therefore permeable to fluid flow. The porous material has an average cell diameter of between 0.1 and 20 mm, preferably between 1 and 4 mm. Due to the development of appropriate production technologies, these materials are becoming more and more commercially attractive.
Kot porozni material je možno uporabiti tudi periodični ali neperiodični celični material, ki je sestav različnih sestavnih delov prednostno definiranih geometrijskih oblik. Izraz celičniAs a porous material, it is also possible to use periodic or non-periodic cellular material, which is an assembly of various components of preferentially defined geometric shapes. The term cellular
-4material se nanaša na material celične strukture. Osnovni elementi sestavnih delov so na primer kvadrat, kvader, heksagon, trikotnik, piramida ali drugačne periodične ali periodičnim slične oblike. Nekaj izvedbenih primerov periodičnega celičnega materiala za izdelavo rotorja po izumu je prikazanih na slikah od 4a do 4j. Ti materiali so lahko tudi anizotropni. Prepustnost za tok fluida je tako lahko odvisna od smeri potovanja fluida. Ob ustrezni konstrukciji je na ta način možno doseči največjo prepustnost materiala v smeri tokovnic fluida, kar se odraža v majhnih tlačnih izgubah. Prav tako je možno doseči visoko natezno trdnost in togost poroznega materiala v izvedbi kot celični material, zaradi česar turbostroj lahko obratuje pri visokih vrtilnih hitrostih in posledično dosega visoke podtlake in/ali volumske pretoke. Nosilna konstrukcija poroznega materiala je prednostno iz kovine ali polimera. Material je lahko spojen s spodnjo in/ali zgornjo steno, tako da tvori obliko panela ali sendvič konstrukcije. Z ustrezno tehnologijo je možna velikoserijska proizvodnja materiala in s tem tržna zanimivost rešitve.-4material refers to the cellular structure material. The basic components of a component are, for example, a square, a square, a hexagon, a triangle, a pyramid, or other periodic or periodically similar shapes. Some embodiments of the periodic cellular material for rotor fabrication according to the invention are shown in Figures 4a through 4j. These materials can also be anisotropic. The permeability to fluid flow may thus depend on the direction of travel of the fluid. With proper construction, it is possible to achieve maximum material permeability in the direction of fluid flow, which is reflected in small pressure losses. It is also possible to achieve high tensile strength and rigidity of the porous material as a cellular material, which makes the turbo machine capable of operating at high rotational speeds and, consequently, achieving high pressures and / or volume flows. The supporting structure of the porous material is preferably metal or polymer. The material can be joined to the bottom and / or top wall to form a panel or sandwich structure. With the appropriate technology, large-scale production of the material is possible and thus the market attractiveness of the solution.
Bistvena lastnost rotorja centrifugalnega turbostroja po izumu je, da se dovedeno mehansko delo preko strukture poroznega materiala prenaša v stagnacij ski porast tlaka in odnosno povečanje entalpije medija.An essential feature of the rotor of a centrifugal turbo machine according to the invention is that the mechanical work brought through the structure of the porous material is transferred to a stagnant increase in pressure and, respectively, an increase in the enthalpy of the medium.
V izvedbenem primeru po sliki 2 je kot rotirajoča struktura uporabljen odprto-celični porozni aluminijast material proizvajalca ERG materials s povprečnim premerom celic 2 mm in je kot fotografija prikazan na sliki 3. Na sliki 3 z je oznako 3.1 shematsko prikazan premer pore in zIn the embodiment of Figure 2, the open-cell porous aluminum material of ERG materials with an average cell diameter of 2 mm is used as the rotating structure, and is shown in Figure 3 as a photograph.
3.2 premer celice poroznega materiala. Navedeni material je izkazal zadostno mehansko trdnost in relativno majhen upor pri pretoku fluida. Navedeni material je homogen in izotropen.3.2 cell diameter of the porous material. Said material exhibited sufficient mechanical strength and relatively low resistance to fluid flow. Said material is homogeneous and isotropic.
V okviru izuma je mogoča tudi uporaba anizotropnega in nehomogenega materiala. Gnani fluid je v tem izvedbenem primeru zrak. Rotor 2.1 centrifugalnega turbostroja, prednostno gnan z elektromotorjem, je pritrjen na gred 2.4 in je sestavljen iz poroznega materiala 2.6, prednostno diskaste oblike, pesta oziroma spodnje stene 2.3, zgornje stene 2.2, inducerja 2.5 in spojnih elementov 2.7, ki so prednostno integrirani v spodnjo steno ali pesto 2.3. Višina poroznega materiala se lahko spreminja v odvisnosti od premera. Prednostno je višina poroznega materiala najvišja na mestu z najmanjšim radijem glede na os gredi 2.4. Opcijsko je lahko v sredini rotorja vstavljen inducer 2.5, ki skrbi za pred rotacijo zraka in preprečuje nastajanje vrtincev v vstopnem ustju rotorja 2.1. Opcijsko je lahko na stacionarnem delu turbostroja vstavljen lopatični ali brezlopatični difuzor 2.8, ki pretvori del kinetične energije zraka vThe use of anisotropic and non-homogeneous material is also possible within the scope of the invention. The driven fluid is, in this embodiment, air. The rotor 2.1 of a centrifugal turbo machine, preferably driven by an electric motor, is attached to a shaft 2.4 and consists of a porous material 2.6, preferably a disk-shaped hub or lower wall 2.3, an upper wall 2.2, an inductor 2.5, and coupling elements 2.7, preferably integrated into the lower wall or hub 2.3. The height of the porous material may vary depending on the diameter. Preferably, the height of the porous material is highest at the site with the smallest radius relative to the shaft axis 2.4. An inductor 2.5 may optionally be inserted in the center of the rotor to prevent air rotation and prevent vortices from forming at the inlet of the rotor 2.1. Optionally, a blade or non-blade diffuser 2.8 can be installed on the stationary part of the turbo machine to convert some of the kinetic energy of the air into
-5stagnacijski tlak. Inducer 2.5 je lahko integriran v spodnjo steno ali pesto 2.3 ali zgornjo steno 2.2.-5stagnation pressure. The inductor 2.5 can be integrated into the lower wall or hub 2.3 or the upper wall 2.2.
Rotor centrifugalnega turbostroja, pri čemer ima rotor spodnjo steno ali pesto, ki je pritrjena na gred turbostroja je značilen po tem, da struktura poroznega materiala ali celičnega materiala zapolnjuje v radialni smeri od vrtišča proti obodu vsaj del rotorja in to prednostno do oboda rotorja, pri čemer gnani fluid potuje v radialni smeri skozi porozni ali celični material. Struktura poroznega ali celičnega materiala je poljubne homogene, nehomogene, izotropne ali anizotropne mikrostrukture in je sestavljen iz trdnine, prednostno kovine, polimera ali keramike, pri čemer je gostota poroznega ali celičnega materiala prednostno med 5% in 30% gostote osnovnega materiala trdnine in je povprečni premer celic med 0.1 in 20 mm, prednostno med 1 in 4 mm. Struktura poroznega ali celičnega materiala je izdelana najmanj iz enega sestavnega dela.The rotor of a centrifugal turbo machine, wherein the rotor has a lower wall or hub that is attached to the shaft of the turbo machine, characterized in that the structure of the porous material or cellular material fills at least a portion of the rotor radially from the pivot toward the circumference, and preferably to the circumference of the rotor, at whereby the driven fluid travels radially through the porous or cellular material. The structure of a porous or cellular material is of any homogeneous, inhomogeneous, isotropic or anisotropic microstructure and consists of a solid, preferably metal, polymer or ceramic, the density of the porous or cellular material being preferably between 5% and 30% of the density of the basic solid material and being average cell diameter between 0.1 and 20 mm, preferably between 1 and 4 mm. The structure of a porous or cellular material is made of at least one component.
Razume se, da lahko strokovnjak s tega področja na osnovi poznavanja gornjega opisa in njegovega opisanega izvedbenega primera zasnuje tudi drugačne izvedbe, zlasti v smislu drugačnega industrijskega oblikovanja oziroma dimenzioniranja rotorja, ne da bi obšel značilnosti izuma.It is understood that one of skill in the art may, based on the knowledge of the above description and its described embodiment, also conceive different embodiments, in particular in terms of different industrial design or dimensioning of the rotor without circumventing the features of the invention.
Opisani turbostroj po izumu zaradi odsotnosti lopatic nima številnih prej opisanih slabosti lopatičnih turbostroj ev. Ni tlačne razlike na obeh straneh lopatice in s tem enega od glavnih mehanizmov nastajanja hrupa. Pri uporabi skupaj z difuzorjem ne prihaja do »blade passinga«. Prav tako recirkulacija toka in zastojni vrtinci niso prisotni. Posledično je visok izkoristek dosežen v širšem območju pretokov, izstopni tok fluida je enakomeren, brez tlačnih pulzacij. Hrup je širokopasoven brez pojava diskretnih frekvenc. Slabost turbostroja je tlačna izguba in s tem padec izkoristka in generacija turbulentnega hrupa, ki naraščajo z relativno hitrostjo fluida v notranjosti poroznega materiala. Uporaba se zato predvideva v območju nižjih in srednjih volumskih pretokov. V primerjavi s Teslinim brezlopatičnim rotorjem je možno doseči dobre izkoristke v širšem območju volumskih pretokov fluida ter manjše izgube na vstopu in izstopu iz rotorja.The absence of blades according to the invention does not have many of the disadvantages of the blade turbines described previously. There is no pressure difference on either side of the blade and thus one of the main mechanisms of noise generation. When used with the diffuser, no blade passing occurs. Also, recirculation and congestion vortices are not present. As a result, high efficiency is achieved over a wider flow range, the outlet fluid flow is steady, without pressure pulsations. Noise is broadband without the appearance of discrete frequencies. The disadvantage of the turbo machine is the pressure loss and hence the drop in efficiency and the generation of turbulent noise, which increase with the relative velocity of the fluid inside the porous material. The use is therefore foreseen in the range of low and medium volume flows. Compared to Tesla's impellerless rotor, it is possible to achieve good efficiency in a wider range of fluid flow rates and lower losses at the inlet and outlet of the rotor.
Potencialne aplikacije so povsod, kjer je pomemben nizek nivo hrupa v območju majhnih in srednjih volumskih pretokov. Kovinski porozni material (»metal foam«) se uporablja tudi za filtracijo prašnih delcev in kot izmenjevalnik toplote, zato bi bilo mogoče v sam rotor implementirati tudi ti dve funkciji: hlajenje motorja in filtracija delcev, ki so prisotni v gnanem fluidu.Potential applications are everywhere where low noise is important in the range of low and medium volume flow rates. Metal foam is also used for dust particle filtration and as a heat exchanger, so these two functions could be implemented into the rotor itself: engine cooling and particle filtration present in the driven fluid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI200800232A SI22894A (en) | 2008-10-06 | 2008-10-06 | Rotor of centrifugal turbomachine |
| PCT/SI2009/000034 WO2010042077A1 (en) | 2008-10-06 | 2009-08-19 | Centrifugal turbo machine rotor |
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| Application Number | Priority Date | Filing Date | Title |
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| SI200800232A SI22894A (en) | 2008-10-06 | 2008-10-06 | Rotor of centrifugal turbomachine |
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| SI22894A true SI22894A (en) | 2010-04-30 |
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| US9551352B2 (en) * | 2013-06-28 | 2017-01-24 | Intel Corporation | Techniques for improved volumetric resistance blower apparatus, system and method |
| JP7035617B2 (en) * | 2018-02-26 | 2022-03-15 | 日本電産株式会社 | Centrifugal fan |
| EP3628872B1 (en) | 2018-09-27 | 2023-01-25 | INTEL Corporation | Volumetric resistance blowers |
| RU2697244C1 (en) * | 2018-10-24 | 2019-08-13 | Владимир Иванович Савичев | Bladeless radial centrifugal compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1225808B (en) * | 1960-06-02 | 1966-09-29 | Junker & Ruh Ges Mit Beschraen | Runner for centrifugal blower, which consists of a body traversed by narrow channels in the conveying direction |
| GB981665A (en) * | 1962-08-16 | 1965-01-27 | Westinghouse Electric Corp | Improvements in or relating to capillary fans |
| US3456718A (en) * | 1967-06-21 | 1969-07-22 | Jan R De Fries | Heat exchanger |
| FR2093113A5 (en) * | 1970-06-02 | 1972-01-28 | Patent Protection Ltd | |
| DE3542811A1 (en) * | 1985-12-04 | 1987-06-11 | Adolf Ing Grad Neuhaus | Device for conveying fluid media |
| US5297942A (en) * | 1992-08-12 | 1994-03-29 | Fleishman Roc V | Porous rotor |
| FR2850037B1 (en) * | 2003-01-17 | 2006-07-28 | Simon Francois | ROTARY MACHINE FOR GENERATING AN ADJUSTABLE FLUID FLOW AND CAPABLE OF CLEANING |
| US7455504B2 (en) * | 2005-11-23 | 2008-11-25 | Hill Engineering | High efficiency fluid movers |
-
2008
- 2008-10-06 SI SI200800232A patent/SI22894A/en not_active IP Right Cessation
-
2009
- 2009-08-19 WO PCT/SI2009/000034 patent/WO2010042077A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010042077A1 (en) | 2010-04-15 |
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| OO00 | Grant of patent |
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