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1. WO2000043677 - METHOD AND APPARATUS FOR PUMPING A MATERIAL AND A ROTOR FOR USE IN CONNECTION THEREWITH

Publication Number WO/2000/043677
Publication Date 27.07.2000
International Application No. PCT/FI1999/001086
International Filing Date 28.12.1999
Chapter 2 Demand Filed 21.07.2000
IPC
D21D 5/26 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
5Purification of the pulp suspension by mechanical means; Apparatus therefor
26De-aeration of paper stock
F04D 7/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
7Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
02of centrifugal type
04the fluids being viscous or non-homogeneous
F04D 29/22 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
18Rotors
22specially for centrifugal pumps
CPC
D21D 5/26
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
5Purification of the pulp suspension by mechanical means; Apparatus therefor
26De-aeration of paper stock
F04D 29/2277
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
18Rotors
22specially for centrifugal pumps
2261with special measures
2277for increasing NPSH or dealing with liquids near boiling-point
F04D 29/2288
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
18Rotors
22specially for centrifugal pumps
2261with special measures
2288for comminuting, mixing or separating
F04D 7/045
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
7Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
02of centrifugal type
04the fluids being viscous or non-homogenous
045with means for comminuting, mixing stirring or otherwise treating
F05B 2210/132
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
BINDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
2210Working fluid
10Kind or type
13mixed, e.g. two-phase fluid
132Pumps with means for separating and evacuating the gaseous phase
Applicants
  • SULZER PUMPEN AG [CH/CH]; Zürcherstrasse 12 CH-8401 Winterthur, CH (AllExceptUS)
  • PELTONEN, Kari [FI/FI]; FI (UsOnly)
  • VESALA, Reijo [FI/FI]; FI (UsOnly)
  • VIKMAN, Vesa [FI/FI]; FI (UsOnly)
Inventors
  • PELTONEN, Kari; FI
  • VESALA, Reijo; FI
  • VIKMAN, Vesa; FI
Agents
  • AHLSTROM KARHULA SERVICES LTD.; Intellectual Property Department P.O. Box 18 FIN-48601 Karhula, FI
Priority Data
98282930.12.1998FI
Publication Language English (EN)
Filing Language Finnish (FI)
Designated States
Title
(EN) METHOD AND APPARATUS FOR PUMPING A MATERIAL AND A ROTOR FOR USE IN CONNECTION THEREWITH
(FR) PROCEDE ET APPAREIL POUR POMPER UNE SUBSTANCE ET ROTOR UTILISE A CET EFFET
Abstract
(EN)
The present invention relates to a method and apparatus for pumping a material and a rotor used in said apparatus. Especially preferably the method, apparatus and rotor according to the invention are suitable for pumping thick, gas-containing, the gas in most cases being air, fiber suspensions of the wood processing industry. The method, apparatus and rotor (522) of the invention are characterized in that the pulp in question is pumped by means of a centrifugal pump utilizing a rotor (522), the blades (562) of which have been twisted so that their pitch changes along an essential part of the length of the rotor (522).
(FR)
La présente invention concerne un procédé et un appareil permettant de pomper une substance, ainsi qu'un rotor utilisé dans ledit appareil. Le procédé, l'appareil, et le rotor de cette invention permettent en particulier de pomper des suspensions fibreuses épaisses contenant un gaz, qui est en général de l'air, et ce notamment dans l'industrie de transformation du bois. Le procédé, l'appareil, et le rotor (522) de cette invention se caractérisent par le fait que la pâte est pompée à l'aide d'une pompe centrifuge munie d'un rotor (522), les pales (562) de ce rotor étant torsadées de sorte que leur pas change le long d'une partie essentielle de la longueur dudit rotor (522).
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