US3234887A - Impeller, particularly with one or more channels - Google Patents

Impeller, particularly with one or more channels Download PDF

Info

Publication number
US3234887A
US3234887A US333011A US33301163A US3234887A US 3234887 A US3234887 A US 3234887A US 333011 A US333011 A US 333011A US 33301163 A US33301163 A US 33301163A US 3234887 A US3234887 A US 3234887A
Authority
US
United States
Prior art keywords
impeller
blade
disengagement
forcing
blades
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US333011A
Other languages
English (en)
Inventor
Grosskopf Carl Bruno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flygts Pumpar AB
Original Assignee
Flygts Pumpar 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
Application filed by Flygts Pumpar AB filed Critical Flygts Pumpar AB
Application granted granted Critical
Publication of US3234887A publication Critical patent/US3234887A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel

Definitions

  • Impellers with not more than two blades for pumping composite mediums such as sludgy waste water, drippy mediums carrying solid particles or the like are known.
  • a disadvantage with such impellers is, that they very quickly wear out when abrasive compositions are pumped and that they are not suitable for pumping media containing gaseous occlusions or similar substances.
  • the present invention has among its objects to avoid such inconveniences and it broadly provides that the blades of the impeller, which are curved convexly helically and which extend over a substantial part of the periphery angle of the impeller, preferably at their inside, are provided with disengagement-forcing steps; furthermore, that the surfaces of the blades in connection with said steps are arranged in such a way, that an extension of the blade surface just before each step in the flowthrough direction is divergent in relation to the blade surface just after the step, the solid particles in the medium being thus prevented from striking the blade surface after the steps.
  • Said steps may be arranged either substantially in the axial flow-through direction or arranged perpendicularly to said axial flow-through direction. It is also possible to bend out the out-flow edge of each blade in a diifusor like manner so as to form a disengage-ment-forcing step.
  • steps are arranged in the flow-through direction it may also be suitable to arrange them diametrically with respect to each other and it is also possible to carry out the different steps between the inand outflow of the impeller with diiferent heights. According to the invention one may also make said steps exchangeable and also carry them out in a plastic material.
  • a whirl creating element within the spacing of the onebladed impeller, such as for instance a vortex impeller with substantially radial or curved blades. Said element thus creates a whirl in the impeller space, which makes it easier to keep the solid particles suspended in the carrying liquid, thus enabling them to pass through the oneblade impeller space in a free flow together with the carrying liquid.
  • the vortex creating element is preferably arranged at the pressure side or bearing side of the impeller and may be provided in a recess of the bearing wall, whereby the borders of the recess will form a limitation at the periphery of the vortex generating impeller.
  • the vortex generating element is suitable to execute the vortex generating element as an exchangeable impeller positioned on an inner axis rotatably mounted in the hollow axis of the oneblade impeller. Further the vortex generating element too may be composed of elastic material.
  • FIG. 1 is a sectional view of a one-channel impeller with a step-shaped disengagement-forcing inflow edge and a step-shaped profile particularly the inside of the blade, the two means forcing disengagement being positioned approximately radially opposite each other;
  • FIG. 2 is a fragmentary sectional view of a flow threshold
  • FIG. 3 is a fragmentary sectional view of a blade outflow edge which is expanded with the purpose of causing disengagement;
  • FIG. 4 is an elevational view of a one-channel impeller in accordance with the invention having disengagement forcing steps at right angles to the system axis;
  • FIGS. 5 and 7 are fragmentary sectional views of twochannel impellers, which are by way of example provided with blades opposite each other;
  • FIG. 6 is a fragmentary sectional view of an S-shaped blade and disengagement-forcing means on the pressure side of said blade and on the sub-pressure side, respectivey;
  • FIG. 8 is a sectional view of a one-channel impeller and a one-blade impeller, respectively, having a substantially smooth or flat interior spacing limitation on the pressure side and the bearing side, respectively, the blade sections of the vortex generator being retracted somewhat behind the plane of the wall;
  • FIG. 9 is a sectional view of a blade in a one-channel impeller with axial' disengagement-forcing profiles in the blade mantle;
  • FIG. 10 is a fragmentary schematic view of a vortex generator having straight radial blades
  • FIG. 11 is a fragmentary sectional view of the vortex generator positioned in a recess in the wall of the pressure side and bearing side, respectively, of a one-channel impeller, wherein said blades can be curved;
  • FIG. 12 is a schematic view of a one-channel impeller with curved blades
  • FIG. 13 is a sectional view, similar to FIG. 11, but showing a modication wherein a one-channel impeller with a vortex generator is provided behind the wall plane and with the circumferential surfaces of the vortex generator wall passing successively into the interior blade surfaces of the one-channel impeller; and
  • FIG. 14 is a sectional view of a further modified vortex generator in front of the wall plane of the pressure side and the bearing side, respectively, and having its circumferential outflow edges bounded by headbandresembling damming means or the like, which are fixed in position or rotatable.
  • the designation 1 refers to a blade which is helically curved outwards and provided with an inflow edge 2 and a disengagement-forcing step 3 as an example situated opposite the step 4 serving for disengagement, the outflow direction 5 of which diverges with respect to the adjacent blade surface 6.
  • the designation 7 refers to a disengagementforcing step on the outside of the blade.
  • the designation 8 refers to a profile in the form of a flow threshold.
  • FIGURE 3 shows a blade 9 provided with an outflow edge 10, which is bent or curved outwards an angle on for the purpose of causing disengage-ment.
  • the designations 1-1, 12 and 13 refer to the axial or inclined inflow surfaces of a one-channel impeller. Together with the remainder of the blade surface 14 these surfaces form the disengagement-forcing steps 15 lying at right angles to the flow-through direction, the outflow direction of said steps being designated 16.
  • the blade outflow edge which is curved outwardly is designated 17.
  • the designations 18 and 19 (FIGURE 5) refer to the blades in a two-channel impeller having diametrically opposed steps wherein the outflow directions are designated 20 and are divergent with respect to the surfaces of the adjacent blade portions.
  • the designations 21 and 22 refer to the blades of a two-channel impeller having profiled blade inflow edges which are positioned adjacent each other mounthpiecelike.
  • An S-shaped blade 28 (FIGURE 6) is provided with disengagementcurved shape.
  • the impeller hub is designated 26, the single blade in a one-channel impeller is designated 27, and 28 is the outflow edge of said blade.
  • the designation 29 refers to a vortex generator with impeller blades 30 and a radial guard plate 31 at the impeller hub.
  • the designation 32 refers to a vortex generator provided with damming surfaces 33 and positioned in a recess.
  • the vortex generator blades 34, FIGUREIZ, are as an example shown having
  • the designation 35 refers to a vortex generator situated in the impeller wheel on the pressure side and substantially behind the impeller plane 36.
  • d The diameters of the inflow connection of the pump housing to the one-channel impeller and the cylindrical inflow portion of a one-channel impeller, respectively, are designated d.
  • a one blade-impeller for pumping composite media comprising an impeller blade which is curved convexly helically and which extends over a substantial part of the periphery angle of the impeller and which further at its inside is provided with disengagement-forcing steps having a surface just before each step which, ifextended in the flow-through direction, wouldbe divergent with respect to the blade surface just after said step, the arrangement of a vortex generating element lying within the impeller blade spacing, said vortex generating element being shaped as an impeller with substantially radially positioned-blades and being furthermore positioned on the impeller wall situated on the bear-ing side of the impeller.
  • a one-bladeim'peller for pumping composite media comprising an impeller blade which is curved convexly helically and which extends over a substantial part of the periphery angle of the impeller and which further at its inside is provided with disengagement-forcing steps having a surface just before each step which, if extended in the flow-through direction, would be divergent With respect to the blade surface just after said step, the arrangement of a vortex generating element lying within the impeller blade spacing, said vortex generating element being shaped as an impeller with substantially radially positioned blades, said vortex generating element being arranged in a recess in the bearing side wall of the impeller, the borders of said recess forming a limitation at the periphery of the vortexgenerating element.
  • a one-blade-impeller for pumping composite media comprising an impeller blade which is curved convexly helically and which extends over a substantial part of the periphery angle of the impeller and which further at its inside is provided with disengagement-forcing steps having a surface just before each step which, if extended in the flow-through direction, would be divergent with respect to the blade surface just after said step, the arrangement of a vortex generating elementlying within the impeller blade spacing, said vortex generating element being shaped as an impeller with substantially radially positioned blades, said vortex generating element comprising an exchangeable impeller which is positioned on an inner axis rotatably mounted in a hollow driving axis of the one-blade impeller.
  • a one-bladeimpeller for pumping composite media comprising an impeller blade which is curved convexly helically and which extends over a substantial part of the periphery angle of the impeller and which further at its inside is provided with disengagement-forcing steps having a surface just before each step which, if extended in the flow-through direction, would be divergent with respect to the blade surface just after saidstep, the arrangement of a vortex generating element lying within the impeller blade spacing, said vortex generating element being shaped as an impeller with substantially radially positioned blades, said vortex generating element being composed of an exchangeable impeller comprising elastic material.
  • a one-blade impeller for pumping composite media comprising an impeller blade which is curved convexly helically and which extends over a substantial part of the periphery angle of the impeller, said impeller blade being provided with disengagement-forcing steps, the blade surface in connection with said steps being arranged in such a way, that an extension of the blade surface just before a step in the flow-through direction is divergent with respect to the blade surface just after said step, the solid particles in the medium thereby being restrained from striking the blade surface after the steps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US333011A 1963-01-05 1963-12-24 Impeller, particularly with one or more channels Expired - Lifetime US3234887A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE0024128 1963-01-05

Publications (1)

Publication Number Publication Date
US3234887A true US3234887A (en) 1966-02-15

Family

ID=7071253

Family Applications (1)

Application Number Title Priority Date Filing Date
US333011A Expired - Lifetime US3234887A (en) 1963-01-05 1963-12-24 Impeller, particularly with one or more channels

Country Status (2)

Country Link
US (1) US3234887A (de)
AT (1) AT252043B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3519816A1 (de) * 1984-06-06 1985-12-12 Osakeyhtiö E. Sarlin AB, Helsinki Laufrad fuer pumpen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE426976B (sv) * 1979-04-27 1983-02-21 Flygt Ab Skovelhjul

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT65687B (de) * 1911-08-04 1914-07-10 Carl Hermann Jaeger Kreiselluftpumpe mit Hilfsflüssigkeit.
US1688345A (en) * 1927-08-16 1928-10-23 Buffalo Hammer Mill Corp Centrifugal fan
GB365817A (en) * 1931-02-05 1932-01-28 Guy Howard Humphreys Improvements in centrifugal pumps
DE655826C (de) * 1933-11-29 1938-01-24 Sigmund Pumpy Bratri Sigmundov Zentrifugalpumpe
US2236706A (en) * 1939-04-22 1941-04-01 John P Damonte Pump
CA503332A (en) * 1954-05-25 Andermatt Carl Centrifugal pump
GB725909A (en) * 1953-09-08 1955-03-09 Henschel & Sohn Ges Mit Beschr Improvements in or relating to centrifugal pumps for liquids
US2737898A (en) * 1949-09-28 1956-03-13 Andermatt Carl Centrifugal pump
DE1020868B (de) * 1955-05-11 1957-12-12 Christa Siebrecht Geb Meyer Laufrad fuer Kreiselpumpen oder Kreiselgeblaese
DE1042384B (de) * 1955-12-22 1958-10-30 Eta Corp G M B H Laufrad fuer Zentrifugalpumpen oder -geblaese
US2887958A (en) * 1952-06-30 1959-05-26 Arthur P Davidson Pump
GB928416A (en) * 1959-04-03 1963-06-12 Eta Corp An improved centrifugal pump for mixed media

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA503332A (en) * 1954-05-25 Andermatt Carl Centrifugal pump
AT65687B (de) * 1911-08-04 1914-07-10 Carl Hermann Jaeger Kreiselluftpumpe mit Hilfsflüssigkeit.
US1688345A (en) * 1927-08-16 1928-10-23 Buffalo Hammer Mill Corp Centrifugal fan
GB365817A (en) * 1931-02-05 1932-01-28 Guy Howard Humphreys Improvements in centrifugal pumps
DE655826C (de) * 1933-11-29 1938-01-24 Sigmund Pumpy Bratri Sigmundov Zentrifugalpumpe
US2236706A (en) * 1939-04-22 1941-04-01 John P Damonte Pump
US2737898A (en) * 1949-09-28 1956-03-13 Andermatt Carl Centrifugal pump
US2887958A (en) * 1952-06-30 1959-05-26 Arthur P Davidson Pump
GB725909A (en) * 1953-09-08 1955-03-09 Henschel & Sohn Ges Mit Beschr Improvements in or relating to centrifugal pumps for liquids
DE1020868B (de) * 1955-05-11 1957-12-12 Christa Siebrecht Geb Meyer Laufrad fuer Kreiselpumpen oder Kreiselgeblaese
DE1042384B (de) * 1955-12-22 1958-10-30 Eta Corp G M B H Laufrad fuer Zentrifugalpumpen oder -geblaese
GB928416A (en) * 1959-04-03 1963-06-12 Eta Corp An improved centrifugal pump for mixed media

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3519816A1 (de) * 1984-06-06 1985-12-12 Osakeyhtiö E. Sarlin AB, Helsinki Laufrad fuer pumpen
US4614478A (en) * 1984-06-06 1986-09-30 Oy E. Sarlin Ab Pump impeller

Also Published As

Publication number Publication date
AT252043B (de) 1967-02-10

Similar Documents

Publication Publication Date Title
US2013455A (en) Pump
US3759628A (en) Vortex pumps
US3692422A (en) Shearing pump
US3444817A (en) Fluid pump
CN107050543B (zh) 一种具有自调节叶片的微小型离心血液泵
US3647314A (en) Centrifugal pump
CN207708246U (zh) 具有自调节叶片的微小型离心血液泵
US3146722A (en) Centrifugal pumps and the like
US1754992A (en) Centrifugal pump
US2037880A (en) Fan
US3107625A (en) Centrifugal liquid pump
US3776658A (en) Pitot tube for pitot pump
US3779668A (en) Stage for a centrifugal pump
US3359908A (en) Turbine pump
US3306528A (en) Centrifugal blower
GB1460919A (en) Pumps
US3096930A (en) Propeller design
US3013501A (en) Centrifugal impeller
US3234887A (en) Impeller, particularly with one or more channels
GB1315547A (en) Axial flow pump for pumping liquids containing solids in suspension
US2329696A (en) Centrifugal apparatus
US3295456A (en) Pump
US3734640A (en) Airfoil vacuum pump with tapered rotor
US3907456A (en) Centrifugal pump
JP2017048703A (ja) 遠心ポンプ