SE438714B - PROCEDURE AND DEVICE FOR PUMPING A HIGH CONCENTRATED FIBER SUSPENSION - Google Patents

PROCEDURE AND DEVICE FOR PUMPING A HIGH CONCENTRATED FIBER SUSPENSION

Info

Publication number
SE438714B
SE438714B SE7805509A SE7805509A SE438714B SE 438714 B SE438714 B SE 438714B SE 7805509 A SE7805509 A SE 7805509A SE 7805509 A SE7805509 A SE 7805509A SE 438714 B SE438714 B SE 438714B
Authority
SE
Sweden
Prior art keywords
pump
rotor
impeller
inlet part
inlet
Prior art date
Application number
SE7805509A
Other languages
Swedish (sv)
Other versions
SE7805509L (en
Inventor
T Niskanen
J Tuomaala
F Sundman
J Gullichsen
Original Assignee
Kamyr Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI771541A external-priority patent/FI62871B/en
Application filed by Kamyr Ab filed Critical Kamyr Ab
Publication of SE7805509L publication Critical patent/SE7805509L/en
Publication of SE438714B publication Critical patent/SE438714B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/13—Kind or type mixed, e.g. two-phase fluid
    • F05B2210/132—Pumps with means for separating and evacuating the gaseous phase

Description

Ju '?8lf)55Û9~2 uxdningar, bl a sådana, som baserar sig på ultraljud, men dessa har ej visat sig vara effektiva i praktiken. Vid ut- tagning av högkoncentrerade massor ur stora behållare brukar man späda ut massan framför utloppsöppníngen för att få massan att rinna ut. Ju '? 8lf) 55Û9 ~ 2 uxdningar, including those based on ultrasound, but these have not been shown to be effective in practice. When removing highly concentrated pulps from large containers, the pulp is usually diluted in front of the outlet opening to make the pulp flow out.

I en utföringsform av uppfinningen anslutes pumpen till massabehållarens utlopp, varvid massan fluidiseras av en rotor, som sträcker sig genom pumpens inloppsdel och massabehållarens utlopp, så att den under tyngdkraftens inverkan kan rinna in i den underliggande pumpen.In one embodiment of the invention, the pump is connected to the outlet of the pulp container, the pulp being fluidized by a rotor extending through the inlet part of the pump and the outlet of the pulp container, so that it can flow into the underlying pump under the influence of gravity.

Uppfinningen beskrivs i det följande närmare under hän- visning till bifogade ritningar, av vilka figur 1 visar en utföringsform av uppfinningen i vertikal~ sektion, figur 2 visar ett snitt längs linjen A-A i figur 1, figur 3 visar en annan utföríngsform av uppfinningen, figur 4 visar ett snitt längs linjen B-B i figur 3, figur 5 visar ett alternativ till utföringsformen enligt figur 3, figur 6 visar ett snitt längs linjen C-C i figur 3, figur 7 visar en ti11ämp~ ning av uppfinningen i vertikalsektion och figur 8 visar ett snitt längs linjen D-D i figur 7.The invention is described in more detail below with reference to the accompanying drawings, of which Figure 1 shows an embodiment of the invention in vertical section, Figure 2 shows a section along the line AA in Figure 1, Figure 3 shows another embodiment of the invention, Figure Figure 4 shows a section along the line BB in Figure 3, Figure 5 shows an alternative to the embodiment according to Figure 3, Figure 6 shows a section along the line CC in Figure 3, Figure 7 shows an application of the invention in vertical section and Figure 8 shows a section along the line DD in Figure 7.

I figurerna 1 och 2 avser hänvisningssiffran 1 pumphuset, som omfattar en inloppsdel 2.fI pumphuset har anhringats ett roterbart lagrat löphjul 3, som har skovlar 4 och en bakvägg 5.In Figures 1 and 2, the reference numeral 1 refers to the pump housing, which comprises an inlet part 2. In the pump housing, a rotatably mounted impeller 3 has been attached, which has vanes 4 and a rear wall 5.

Löphjulets ena sida är öppen och pumphusets inre yta 6, som har samma form som skovelkanten, fungerar som styryta för strömningen. Invid skovlarnas framkant finns fördjupningar 7 i pumphusets inre yta. Dessa åstadkommer i fibersuspensionen slrömningskomponenter av växlande riktning (i figur 1 beteckna« de med x), vilkas riktning avviker från huvudströmningsrikt» ningen (betecknad med y) samt fiberbíndningarna upplösande skär- krafter, emedan den strömníngskanals Za bredd í löphjulet, som begränsas av pumphuset och löphjulets bakvägg alternerande ökar och minskar. Till följd därav fluidiseras fibersuspen- sinnen invid skovlarnas framkanter och dess strömningsmotstånd minskar.One side of the impeller is open and the inner surface 6 of the pump housing, which has the same shape as the vane edge, acts as a guide surface for the flow. Adjacent to the leading edge of the vanes are depressions 7 in the inner surface of the pump housing. These provide in the fiber suspension flow components of alternating direction (in Figure 1 denote «those with x), the direction of which deviates from the main flow direction» (denoted by y) and the fiber bonding dissolving shear forces, because the flow channel Za width in the impeller, which is limited by the impeller, and the rear wall of the impeller alternately increases and decreases. As a result, the fiber suspensions near the leading edges of the vanes are fluidized and their flow resistance decreases.

I figurerna 3 och 4 visas ett annat utförande, där hän~ visningssíffrorna 2 och 3 har samma betydelse, som i figur 1. ln luppsdelens Z tvärsnittskontur 8 är här orund. Fibersuspen- sioneu strömmar sålunda till löphjulet 3 genom en kanal, vars IH 7805509-“2 sektion bildas av djupare delar 9, som är belägna på ett smärre avstånd från centrum samt grundare delar 10, som ligger närmare centrum. Dä löphjulet roterar försätts också fibersus~ pensionen i inloppsdelen i rotation och utsätts till följd av inloppets orunda form för skärkrafter, emedan dess tvär- snitt alternerande ökar och minskar i rotationsriktningen.Figures 3 and 4 show another embodiment, in which the reference numerals 2 and 3 have the same meaning as in Figure 1. The cross-sectional contour 8 of the magnifying glass part Z is round here. The fiber suspension thus flows to the impeller 3 through a channel, the section of which IH 7805509-2 is formed by deeper parts 9, which are located at a smaller distance from the center, and shallower parts 10, which are closer to the center. As the impeller rotates, the fiber suspension in the inlet part is also set in rotation and is subjected to cutting forces as a result of the round shape of the inlet, since its cross-section alternately increases and decreases in the direction of rotation.

Härvid fluidiscras fibersuspensionen omedelbart framför löp- hjnlet och kan obehindrat inströmma i löphjulets skovelkanaler.In this case, the fiber suspension is fluidized immediately in front of the impeller and can flow unhindered into the impeller channels of the impeller.

I figurerna 5 och 6 visas ett alternativt utförande, där i pumpens inloppsdel, som har ett orunt tvärsnitt, har framför löphjulet anbringats en orund rotor 11, som befrämjar fluidiseringen av fibersuspensíonen genom att dess yttre yta 11a i samverkan med inloppsdelens inre yta alstrar till sin riktning växlande radiella strömníngskomponenter i inlopps- delen.Figures 5 and 6 show an alternative embodiment, where in the inlet part of the pump, which has an orange cross-section, a non-round rotor 11 has been arranged in front of the impeller, which promotes the fluidization of the fiber suspension by its outer surface 11a in conjunction with the inner surface of the inlet part. direction of changing radial flow components in the inlet part.

I figurerna 7 och 8 visas en tillämpning av uppfinningen, där pnmpens inloppsdel Z är ansluten till en massabehállares 13 utlopp 14 för utmatníng av massa ur behållaren. En rotor 15, som sträcker sig genom pumpens inloppsdel och massabehål~ lnrnns utlopp, har anbríngats på samma axel 6, på vilken löp- hinlet 3 är monterat. Rotorn är försedd med ribbformiga ut- aprnng 16 och pumpens inloppsdel samt massabehållarens ut- lopp är försedda med ribbformiga utsprång 17,18, vilka huvud- .nkligcn är axiellt riktade.Figures 7 and 8 show an application of the invention, where the inlet part Z of the pump is connected to the outlet 14 of a pulp container 13 for discharging pulp from the container. A rotor 15, which extends through the inlet part of the pump and the outlet of the pulp container, has been mounted on the same shaft 6, on which the impeller 3 is mounted. The rotor is provided with rib-shaped outlets 16 and the inlet part of the pump and the outlet of the pulp container are provided with rib-shaped projections 17,18, which are mainly axially directed.

Vid behov kan massabehållaren förses med flera utlopp, r»11 vilka var sin pump enligt uppfinningen anslutes.If necessary, the pulp container can be provided with several outlets, 11 of which are each connected to a pump according to the invention.

Hppfinníngen belyses av nedanstående utföringsexempel. yvY¶PEL 1 Rotorn 11 enligt figurerna 5 och 6 i ínloppsdelen fram» ”fr löphjulet hade följande dimensioner: Största diameter 85 mm Minsta diameter 75 mm Inloppsdelens motsvarande värden utgjorde 150 och 130 mm 1500 rpm 3000 - 7500 1/min Varvtal Flödesmängd ll) 7805509-2 .ELLF-.MÄÉLÅ Fördjupningarna 7 enligt figurerna I och 2 invid fram« kanten av löphjulets skovlar framställdes med hjälp av en cylindrisk fräs, vars diameter utgjorde 120 mm.The invention is illustrated by the following working examples. EXAMPLE 1 The rotor 11 according to Figures 5 and 6 in the inlet part in front of the impeller had the following dimensions: Maximum diameter 85 mm Minimum diameter 75 mm The corresponding values of the inlet part were 150 and 130 mm 1500 rpm 3000 - 7500 1 / min Speed Flow rate ll) 7805509-2 .ELLF-.MÄÉLÅ The depressions 7 according to Figures I and 2 next to the front edge of the impellers of the impeller were made by means of a cylindrical cutter, the diameter of which was 120 mm.

Högsta djup 3 mm Antal 8 Inloppsdelens diameter 150 mm Varvtal 1500 rpm Flödesmängd 3000 ~ 7500 1/min Utförda prov visar, att pumpen enligt uppfinningen med lätthet kan pumpa pappers- och cellulosaindustrins olika massor i konsístensområdet 8 - 12 %. Även pumpning av tjockare massor är möjlig. Under 6 % konsistens fungerar pumpen med ett tillopps- tryck, som är Z - 3 mvp mindre än en konventionell massapumps.Maximum depth 3 mm Number 8 Inlet part diameter 150 mm Speed 1500 rpm Flow rate 3000 ~ 7500 1 / min Tests performed show that the pump according to the invention can easily pump the various masses of the paper and cellulose industry in the consistency range 8 - 12%. Pumping of thicker masses is also possible. Below 6% consistency, the pump operates with an inlet pressure, which is Z - 3 mvp less than a conventional pulp pump.

Uppfinningen är ej begränsad till de visade utförings- formerna utan kan modifieras på flera sätt utan att avvika från uppfinníngstanken. Så kan exempelvis rotorn rotera med en annan vinkelhastighet än löphjulet 4.The invention is not limited to the embodiments shown but can be modified in several ways without departing from the inventive concept. For example, the rotor can rotate at a different angular velocity than the impeller 4.

Claims (6)

1. wwfruww-v-...wvfw-w... __. _ 7805509-'2 vvx'l'r_ara'r_kl_z_nyj -mMmNml.1. wwfruww-v -... wvfw-w ... __. _ 7805509-'2 vvx'l'r_ara'r_kl_z_nyj -mMmNml. 2. Förfarande för pumpning av en högkoncentrerad fiber- snnponsíon medelst en centrifugalpump, k ä n n e t e c k n a t av att för fluidisering av fíbersuspensíon i omradet mellan uentrífugalpumpens ínloppskanals (Za) mynning och pumpens löpskovlars (4) framkant försattes den genom ínloppskanalen strömmande fibersuspensionen utmed en relativt lang axiell strätka och/eller omedelbart framför löpskovlarnas (4) framkant i en raliell fram- och återgàende rörelse medelst en roterande rotors (3 och/eller 11) vingar, runt vilka vingars ytterkant fihezsuspensíonen fritt kan strömma i períferins riktning i rotorns alla rotatíonsvinkellägen, varvid den rotatíonsrörelse som rotorn åstadkommer tillsammans med den fram- och återgáende radialströmníngen åstadkommer en turbulent strömníng í inlopps~ kanalen. 3. Pump för pumpning av en högkoncentrerad fíbersuspen- ;ion, innefattande ett inlopp, ett hus, ett utlopp och ett löp~ hjul (Sr med skovlar (4), k ä n n e t e c k n a d av att det framför löphjulet (3) finns en kanal (Za), som begränsas av inloppsdelens (Z) inre yta (8) och en i inloppsdelen an- ordnad rotors yttre yta (11a),vilka båda ytor är försedda med ursprñng och/eller fördjupningar och är anordnade att oberoende av rotorns vinkelläge erbjuda ett i ringled oavbrutet suspen- sionsflöde l kanalen omkring rotorn.Method for pumping a highly concentrated fiber suspension by means of a centrifugal pump, characterized in that in order to fluidize the fiber suspension in the area between the inlet channel (Za) of the centrifugal pump and the leading edge of the pump vanes (4), the relative axial stretch and / or immediately in front of the leading edge of the running vanes (4) in a reciprocating motion by means of the wings of a rotating rotor (3 and / or 11), around which the outer edge of the wings the suspension can flow freely in the peripheral direction in all rotational angles the rotational movement which the rotor produces together with the reciprocating radial flow produces a turbulent flow in the inlet channel. Pump for pumping a highly concentrated fiber suspension, comprising an inlet, a housing, an outlet and an impeller (Sr with vanes (4), characterized in that there is a channel in front of the impeller (3). Za), which is delimited by the inner surface (8) of the inlet part (Z) and the outer surface (11a) of a rotor arranged in the inlet part, both surfaces of which are provided with origins and / or depressions and are arranged to offer an independent position of the rotor. in a continuous uninterrupted suspension flow in the channel around the rotor. 3. Pump enligt krav 2, k ä n n e t e c k n a d av att den í pumpens inloppsdel (2) förlagda rotorn (11) är sammankopplad med löphjulet (3).Pump according to Claim 2, characterized in that the rotor (11) located in the inlet part (2) of the pump is connected to the impeller (3). 4. Pump enligt krav 3, k ä n n e t e c k n a d av att den i pumpens inloppsdel (2) förlagda rotorn (ll) är anordnad att rotera med en annan vinkelhastíghet än pumpens löphjul (3).Pump according to claim 3, characterized in that the rotor (II) located in the inlet part (2) of the pump is arranged to rotate at an angular velocity other than the impeller (3) of the pump. 5. S. Pump enligt krav 3 eller 4, k ä n n e t e c k n a d av att rotorn (11) sträcker sig genom en till pumpen ansluten massaeísterns (l3) utlopp (14).5. A pump according to claim 3 or 4, characterized in that the rotor (11) extends through an outlet (14) of the mass iron (13) connected to the pump. 6. Pump enligt krav 5, k ä n n e t e c k n a d av ort fördjupningar och/eller utsprång (l7,l8) är anordnade l innerytnn av massacísternens (13) utlopp (14). _ _._..,_, H. . .,_. ._._....-....~.p.._._..... .Pump according to claim 5, characterized in that depressions and / or projections (17, 17) are arranged in the inner surface of the outlet (14) of the mass cistern (13). _ _._..,_, HRS. . ., _. ._._....-.... ~ .p .._._......
SE7805509A 1977-05-16 1978-05-12 PROCEDURE AND DEVICE FOR PUMPING A HIGH CONCENTRATED FIBER SUSPENSION SE438714B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI771541A FI62871B (en) 1977-05-16 1977-05-16 FOERFARANDE FOER PUMPNING AV EN FIBERSUSPENSION
FI781071A FI82728C (en) 1977-05-16 1978-04-10 Device for pumping a fiber suspension

Publications (2)

Publication Number Publication Date
SE7805509L SE7805509L (en) 1978-11-17
SE438714B true SE438714B (en) 1985-04-29

Family

ID=26156874

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7805509A SE438714B (en) 1977-05-16 1978-05-12 PROCEDURE AND DEVICE FOR PUMPING A HIGH CONCENTRATED FIBER SUSPENSION

Country Status (16)

Country Link
JP (1) JPS5416702A (en)
AT (1) AT357043B (en)
AU (1) AU514833B2 (en)
BR (1) BR7803004A (en)
CA (1) CA1128368A (en)
CS (1) CS223822B2 (en)
DE (1) DE2818540C3 (en)
ES (1) ES469724A1 (en)
FI (1) FI82728C (en)
FR (1) FR2391378A1 (en)
GB (1) GB1589134A (en)
IN (1) IN150144B (en)
IT (1) IT1108104B (en)
NO (1) NO150574C (en)
NZ (1) NZ187259A (en)
SE (1) SE438714B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI62871B (en) * 1977-05-16 1982-11-30 Ahlstroem Oy FOERFARANDE FOER PUMPNING AV EN FIBERSUSPENSION
FI69683C (en) * 1982-02-08 1986-03-10 Ahlstroem Oy CENTRIFUGALPUMP FOER VAETSKOR INNEHAOLLANDE FASTA AEMNEN
FI67580C (en) * 1983-07-12 1985-04-10 Ahlstroem Oy FOERFARANDE OCH ANORDNING FOER FIBRERING SILNING OCH PUMPNING AV CELLULOSAMASSA OCH RETURPAPPER
JPS61198593U (en) * 1985-05-31 1986-12-11
US4776758A (en) * 1987-07-06 1988-10-11 Kamyr Ab Combined fluidizing and vacuum pump
FI85751B (en) * 1988-06-17 1992-02-14 Ahlstroem Oy FOERFARANDE OCH ANORDNING FOER PUMPNING AV TJOCKT MEDIUM.
SE464318B (en) * 1990-02-28 1991-04-08 Flygt Ab SHAFT CONSTRUCTION FOR A PUMP WHEEL ROTARY RUBBER
JP2636966B2 (en) * 1990-12-20 1997-08-06 株式会社三興ポンプ製作所 Submersible pump for drain with cutter
US5413460A (en) * 1993-06-17 1995-05-09 Goulds Pumps, Incorporated Centrifugal pump for pumping fiber suspensions

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE564826C (en) * 1932-11-23 Siemens Schuckertwerke Akt Ges Device for conveying gases or liquids with a helical gear in the inlet channel of a centrifugal motor and a diffuser connected between the helical and centrifugal motor and flowed through from the inside to the outside
DE704138C (en) * 1938-11-18 1941-03-24 Masch Fabriken Wagner Doerries Face plate holder with horizontal shaft
DE836435C (en) * 1941-11-20 1952-04-15 Clyde Paper Company Ltd Method and device for defibrating paper pulp
US2371681A (en) * 1943-01-18 1945-03-20 Jr Augustus C Durdin Centrifugal cutting pump
DE1000677B (en) * 1952-12-20 1957-01-10 Doerries A G Vorm Maschinenfab Refiner
US3128051A (en) * 1960-11-07 1964-04-07 Dag Mfg Co Pump
CH411584A (en) * 1964-07-10 1966-04-15 Kolb Eugen Ag Centrifugal pump for pumping contaminated liquids
CH459510A (en) * 1966-07-08 1968-07-15 Sulzer Ag Prefabricated installation element for air conditioning systems
BE724376A (en) * 1967-12-15 1969-05-22
DE1703075A1 (en) * 1968-03-28 1972-01-13 Moertl Karl Clearance for pump suction pipes
IE34587B1 (en) * 1969-05-19 1975-06-25 Warman Equip Centrifugal froth pump
DE2411043A1 (en) * 1974-03-08 1975-09-18 Abs Pumps Ltd Submerged sewage pump with disintegrator - exerts disintegrating forces in radial direction by radial rounded teeth on discs
US3961758A (en) * 1974-08-23 1976-06-08 Peabody Barnes, Inc. Centrifugal pump with integral grinder
CH582788A5 (en) * 1974-09-23 1976-12-15 Escher Wyss Gmbh
GB1568388A (en) * 1975-11-29 1980-05-29 Blum A Pump with comminuating means at the inlet

Also Published As

Publication number Publication date
CA1128368A (en) 1982-07-27
SE7805509L (en) 1978-11-17
FI82728C (en) 1991-04-10
NO150574B (en) 1984-07-30
IN150144B (en) 1982-07-31
BR7803004A (en) 1979-05-29
JPS5416702A (en) 1979-02-07
GB1589134A (en) 1981-05-07
NZ187259A (en) 1981-05-01
FI781071A (en) 1979-10-11
DE2818540B2 (en) 1979-04-12
CS223822B2 (en) 1983-11-25
FR2391378A1 (en) 1978-12-15
IT7868105A0 (en) 1978-05-15
AU3575878A (en) 1979-11-08
FI82728B (en) 1990-12-31
NO781627L (en) 1978-11-17
JPS6246713B2 (en) 1987-10-03
DE2818540A1 (en) 1978-11-30
IT1108104B (en) 1985-12-02
ES469724A1 (en) 1979-09-16
AT357043B (en) 1980-06-10
AU514833B2 (en) 1981-02-26
DE2818540C3 (en) 1984-08-30
FR2391378B1 (en) 1982-04-23
NO150574C (en) 1984-11-07

Similar Documents

Publication Publication Date Title
FI69683C (en) CENTRIFUGALPUMP FOER VAETSKOR INNEHAOLLANDE FASTA AEMNEN
US1718396A (en) Centrifugal pump
US2252788A (en) Vane rotor
PT93879B (en) PUMP AND PROCESS FOR SEPARATING A GAS FROM A FLUID TO BE PUMPED
SE438714B (en) PROCEDURE AND DEVICE FOR PUMPING A HIGH CONCENTRATED FIBER SUSPENSION
US4575308A (en) Solid materials pump
KR101545278B1 (en) Axial or mixed flow pump
FI75908B (en) CENTRIPETALPUMP.
KR20150120168A (en) Centrifugal type mixed flow blower
FI62871B (en) FOERFARANDE FOER PUMPNING AV EN FIBERSUSPENSION
FI76132B (en) FOERFARANDE OCH ANORDNING FOER INBLANDNING AV VAETSKA ELLER GAS I CELLULOSAMASSA.
KR101836455B1 (en) a impeller for pump
US1887417A (en) Rotary pump and fan
SE426180B (en) A screening device
SE533905C2 (en) Refiner with helical inlet and tangential double outlet
KR101672265B1 (en) Mixed flow impeller having hollow airfoil blades
CN105570185A (en) Single-channel pump impeller with radial force balance disc
EP0248007A1 (en) Method and apparatus for dividing and uniting the flows of high-consistency fibre suspensions.
AU2002220608A1 (en) Centrifugal wheel pump
KR101883834B1 (en) Mixed flow impeller having forward curved blade with mean camber line shape section of airfoil
JP2018132021A (en) Centrifugal compressor and method for using centrifugal compressor
JP2017166464A (en) pump
KR102558158B1 (en) Centrifugal impeller with partially opened shroud
US1947334A (en) Rotary fluid-pressure engine
BR102015017102A2 (en) intake channel arrangement for centrifugal pump volute housing, flange member, centrifugal pump volute housing and centrifugal pump

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 7805509-2

Format of ref document f/p: F

NUG Patent has lapsed

Ref document number: 7805509-2

Format of ref document f/p: F