EP3199818A1 - Seitenkanal bläser/sauger mit verbessertem laufrad - Google Patents

Seitenkanal bläser/sauger mit verbessertem laufrad Download PDF

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Publication number
EP3199818A1
EP3199818A1 EP16153463.1A EP16153463A EP3199818A1 EP 3199818 A1 EP3199818 A1 EP 3199818A1 EP 16153463 A EP16153463 A EP 16153463A EP 3199818 A1 EP3199818 A1 EP 3199818A1
Authority
EP
European Patent Office
Prior art keywords
blades
machine
impeller
central body
segment
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.)
Withdrawn
Application number
EP16153463.1A
Other languages
English (en)
French (fr)
Inventor
Pietro Bianchi
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.)
Esam SpA
Original Assignee
Esam SpA
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 Esam SpA filed Critical Esam SpA
Priority to EP16153463.1A priority Critical patent/EP3199818A1/de
Publication of EP3199818A1 publication Critical patent/EP3199818A1/de
Withdrawn legal-status Critical Current

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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
    • F04D23/00—Other rotary non-positive-displacement pumps
    • F04D23/008—Regenerative pumps
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes

Definitions

  • the present invention relates to a side-channel blower / aspirator with an improved impeller.
  • the impeller is enclosed into a casing in which an annular conduit is defined, in which the impeller blades rotate.
  • the annular conduit has a suction mouth, through which a fluid (normally air) is aspirated and a delivery mouth through which the fluid is expelled.
  • a fluid normally air
  • the impellers used in side-channel machines are provided with rectilinear radial blades.
  • the technical task underpinning the present invention is therefore to propose a side-channel blower / aspirator with an improved impeller that makes it able to offer better performance levels with respect to the known art.
  • 1 indicates the side-channel blower / aspirator according to the invention.
  • the proposed machine 1 comprises an impeller 2 improved with respect to machines of the prior art.
  • the impeller 2 is provided with a plurality of peripheral blades 21 and is equipped with a central hub 22, fitted onto a shaft 11 (see in particular figure 2 ), which is placed in rotation by motor means of the known type, for example the electric motor 12 represented in figures 1 and 2 .
  • the blades 21 of the impeller 2 are not rectilinear like those of the prior art but, on the contrary, they have a concavity 23 on the front part, i.e. at the face turning towards the rotation direction (see in particular figure 4 ).
  • the blades 21 comprise at least one portion which has a front face 200 including a plurality of planes 201, 202, 203, 204, 205 (i.e. flat surfaces) at an angle to one another, defining the aforementioned concavity 23, which faces the advancement direction of the blades 21 (compare figures 4 and 5 ).
  • the impeller 2 according to the invention is enclosed in a casing 13, 14 which internally defines an annular conduit C within which the blades 21 rotate, in the direction indicated by the arrow in figure 3 .
  • the two parts of the channel C which are ideally separated by the plane orthogonal to the axis of rotation of the impeller 2 coinciding with the plane of symmetry of the machine 1, are called "side channels”.
  • the casing is preferably made of two half-shells 13, 14, sealingly fixed, one of which is connected to the electric motor 12, while the other one constitutes a front cover.
  • the aforementioned annular conduit C has a suction mouth 3 for aspirating fluid (in particular air) taken externally to the machine 1 and a delivery mouth 4 for allowing the fluid to exit from the machine 1 itself (see figure 3 ).
  • the annular conduit C has a first section which, with respect to the advancement direction of the blades 21 in the conduit, goes from the suction mouth 3 to the delivery mouth 4.
  • the annular conduit C further has a second section, which goes from the delivery mouth 4 to the suction mouth 3, within which, preferably, the blades 21 skim the internal walls of the section itself so as to limit the passage of fluid from the delivery mouth 4 to the suction mouth 3.
  • the impeller 2 is equipped with blades 21 which each include at least one portion comprising numerous segments 211, 212, 213, 214, 215 at an angle to one another, each equipped with one of said planes 201, 202, 203, 204, 205, so as to define the aforementioned front concavity 23.
  • Each segment may comprise a quadrangular plate 211, 212, 213, 214, 215.
  • the blades are formed entirely by a series of plate-shaped segments 211, 212, 213, 214, 215, joined two by two, through junction lines at which a relative internal angle is formed, which is clearly less than 180 degrees.
  • each blade 21 includes five segments 211, 212, 213, 214, 215, however, versions are possible in which there are a different number from five blade 21 segments, or in which different blades 21 or different groups of blades 21 have different numbers of segments, etc..
  • a version of the invention is not excluded in which not all the impeller blades 21 comprise the front concavity 23.
  • the impeller 2 may comprise a central body 24, preferably axial symmetric, for example discoidal, at the centre of which the aforementioned hub 22 is afforded and from which the blades 21 extend.
  • the blades 21 originate from a circumferential portion 25 of the central body 24 and extend outwards, substantially lying in the plane of the central body 24 itself.
  • each blade 21 includes a proximal segment 211 (i.e. more internal) joined to the central body 24 at its circumferential portion 25.
  • a proximal segment 211 may be sloping backwards with respect to the rotation direction, and defines an obtuse angle at the front with the aforementioned circumferential portion 25.
  • Each successive (and therefore more external) segment in the series that defines the blade 21, lies on a plane sloping forwards with respect to the previous segment, i.e. the segment to which it is joined and is more internal.
  • the second segment 212 which originates from the aforementioned proximal segment 211, is sloping forwards with respect to the latter, defining therewith an angle positioned to the front of the blade, and so on for the gradually more external segments 213, 214, until the distal segment 215 which has a free end (see again figure 4 ).
  • the blades may include curved portions, defining longitudinally and/or transversally curved sections.
  • the air found inside the annular channel receives, from the impeller 2, both a thrust forwards (see arrow A of figure 4 ) and a centrifugal thrust (see arrow B), i.e. away from the centre of rotation of the impeller 2 itself.
  • the part of air thrust in the centrifugal direction which would tend to move radially away from the blades 21, is instead intercepted by the blades 21 themselves and projected forwards.
  • the radial component of the fluid's motion field is in part deviated in the circumferential direction already by the actual blade before the fluid is subject to the action of the closing walls of the annular conduit C.
  • part of the fluid contained in the annular conduit C tends to move forwards in the rotation direction along an ascending curve; instead, part of the fluid closer to the centre of rotation follows a descending curve until it moves in the retrograde direction upon reaching the internal area affected by the base of the blades 21 (see arrow D in figure 4 ).
  • the blades 21 of the impeller 2 according to the invention being equipped at the base of the aforementioned proximal segment 211 which bends "backwards" as defined above, are able to intercept the aforementioned retrograde fluid and push it forwards, increasing the efficiency of the machine 1.
  • each blade 21 is contained in one of the two semi-spaces defined by an ideal diametral plane that joins the axis of the central body 24 to the joining zone between the blade 21 and the central body 24.
  • the impeller 2 proposed may include a portion with an annular progression 26, i.e. a geometric surface of revolution about the axis of rotation.
  • Such an annular portion 26 is adjacent to or incorporated into the blades 21 and extends starting from the circumferential portion 25 mentioned various times of the impeller, in a radial direction and ends at a shorter distance than the longitudinal extension of the blades 21.
  • the impeller 2 proposed may be made of die-cast aluminium or a polymeric material by injection moulding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP16153463.1A 2016-01-29 2016-01-29 Seitenkanal bläser/sauger mit verbessertem laufrad Withdrawn EP3199818A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16153463.1A EP3199818A1 (de) 2016-01-29 2016-01-29 Seitenkanal bläser/sauger mit verbessertem laufrad

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16153463.1A EP3199818A1 (de) 2016-01-29 2016-01-29 Seitenkanal bläser/sauger mit verbessertem laufrad

Publications (1)

Publication Number Publication Date
EP3199818A1 true EP3199818A1 (de) 2017-08-02

Family

ID=55521356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16153463.1A Withdrawn EP3199818A1 (de) 2016-01-29 2016-01-29 Seitenkanal bläser/sauger mit verbessertem laufrad

Country Status (1)

Country Link
EP (1) EP3199818A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955955A1 (de) * 1999-11-19 2001-06-13 Siemens Ag Seitenkanalmaschine
DE20214104U1 (de) * 2002-09-12 2003-04-03 Nash Elmo Ind Gmbh Seitenkanalverdichter
DE102007053017A1 (de) * 2007-11-05 2009-05-07 Gardner Denver Deutschland Gmbh Seitenkanalverdichter
DE102014106440A1 (de) * 2014-05-08 2015-11-12 Gebr. Becker Gmbh Laufrad, insbesondere für eine Seitenkanalmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955955A1 (de) * 1999-11-19 2001-06-13 Siemens Ag Seitenkanalmaschine
DE20214104U1 (de) * 2002-09-12 2003-04-03 Nash Elmo Ind Gmbh Seitenkanalverdichter
DE102007053017A1 (de) * 2007-11-05 2009-05-07 Gardner Denver Deutschland Gmbh Seitenkanalverdichter
DE102014106440A1 (de) * 2014-05-08 2015-11-12 Gebr. Becker Gmbh Laufrad, insbesondere für eine Seitenkanalmaschine

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