WO2008086987A1 - Turbomachine à rotor entraîné - Google Patents

Turbomachine à rotor entraîné Download PDF

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Publication number
WO2008086987A1
WO2008086987A1 PCT/EP2008/000211 EP2008000211W WO2008086987A1 WO 2008086987 A1 WO2008086987 A1 WO 2008086987A1 EP 2008000211 W EP2008000211 W EP 2008000211W WO 2008086987 A1 WO2008086987 A1 WO 2008086987A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
longitudinal elements
turbomachine
longitudinal
chamber
Prior art date
Application number
PCT/EP2008/000211
Other languages
German (de)
English (en)
Inventor
Zeki Akbayir
Original Assignee
Zeki Akbayir
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 DE102007003088A external-priority patent/DE102007003088B3/de
Application filed by Zeki Akbayir filed Critical Zeki Akbayir
Publication of WO2008086987A1 publication Critical patent/WO2008086987A1/fr

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
    • 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
    • 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

Definitions

  • the invention relates to a turbomachine with a driven rotor, which rotates in a gaseous or liquid medium and at least on one of its lateral surfaces has a wing profile with at least one convex elevation, wherein the rotor contains an axial cavity inside and the rotor with at least one chamber to - Is connected or discharge of the medium, wherein between the cavity and the outer lateral surface in the region of the airfoil at least one passage opening is provided according to the main patent DE 10 2005 049 938 C2.
  • Turbomachines are characterized in that they generate a pressure difference in a gaseous or liquid medium or are driven by a pressure difference in such a medium.
  • flow machines usually have a rotor which is rotatably mounted in the gaseous or liquid medium relative to a stator and generates a pressure difference by its shape or arrangement.
  • Such turbomachines include primarily most types of pumps, compressors, turbomachines, turbines or wind energy converters, which have rotors in various designs and are usually rotatably mounted in a housing as a stator. By the rotation of a driven rotor and the pressure differences generated thereby occur within the rotor housing flows of the medium, which influence the effect of the rotor or the turbomachine.
  • the invention is therefore based on the object to provide a turbomachine, which has a high efficiency and at the same time generates a high flow rate.
  • the invention has the advantage that the flow medium is largely prevented by the longitudinal elements transversely to the direction of rotation within the housing shell to an outer rotational movement, so that the rotor basically rotates in a medium flowing only slowly and thus produces a maximum pressure difference.
  • the entire rotational energy for generating the pressure difference can be used, resulting in advantageous manner not only a large flow rate, but also a high efficiency.
  • the invention also has the advantage that even with simple longitudinal elements between the rotor surface and the inner surface of the rotor housing, the flow of the medium above the rotor can be prevented in a simple manner at a circumferential acceleration, which can be increased with little effort, the flow rate.
  • the invention will be explained in more detail with reference to an embodiment which is illustrated in the drawing. Show it:
  • FIG. 1 shows a perspective view of a pump with a single-stage pump rotor
  • Fig. 2 a front view of the pump with the
  • FIG. 4 shows a perspective view of a
  • Housing part with slightly coiled arranged longitudinal elements.
  • a pump 1 is shown in perspective, which includes a single-stage hollow rotor 2 as a pump rotor having four wing profile elements 3 on an outer circumferential surface 4, between which passage openings 5 are arranged to the inner cavity 6.
  • Embodiment which is preferably operated with water as the liquid medium.
  • the pump 2 consists essentially of a stationary housing 7 as a stator in which the pump rotor 2 is arranged.
  • the rotor is rotatably mounted in the housing 7 in two bearings 8 and has in its center a shaft 9 which is connected to a drive motor, not shown.
  • the housing 7 is formed substantially cylindrical and includes on its outer circumferential surface an outlet opening 11 for discharging the water to be pumped.
  • On the left end or lateral surface of the housing 7, an inlet opening 10 is provided for the inlet of the water to be pumped to the cavity 6, which is connectable to a feed line, not shown.
  • the inlet opening 10 is connected to the cavity 6 of the rotor 2 and forms with this an inlet chamber 12.
  • With such a pump 1 can in Basically all liquid media such. As water, oil and the like, as well as all liquids that are mixed with solids, such. As dispersions are transported.
  • the pump 1 described above is shown in front view, from which in detail the arrangement and design of the rotor 2 can be seen.
  • the rotor 2 essentially consists of a cylindrical impeller 20, which has a cylindrical cavity 6 inside, which forms an inlet chamber 12 in the illustrated pump 1.
  • nine convex elevations 3 are arranged distributed in equal angular portions, which form an axially extending airfoil on the outer tangential lateral surface 4 of the rotor 2.
  • the rotor 2 Since the rotor 2 has on its outer tangential lateral surface 4 a plurality of airfoil elements 3, which also form a negative pressure region in a rotation according to the Bernoulli effect in gaseous media such as air, thus all gaseous media as well as gaseous media permeated with bulk materials can be transported, compressed or sucked in.
  • gaseous media such as air
  • passages 5 are provided to the inner cavity 6 or to the inlet chamber 12 of the pump 1, in which there is the medium to be pumped, such as water.
  • the rotor 2 is driven at a predetermined rotational speed and direction 18, so that on the outer circumferential surface 4 in the direction of rotation 18 behind the convex elevation 19 after the Bernoulli effect, a negative pressure or a pressure difference to the surrounding gaseous or liquid Medium forms, so that from the pressure higher interior space 6, the medium is sucked to the outside.
  • the pressure difference depends essentially on the speed or the peripheral speed of the impeller 20.
  • the Pressure difference increases approximately linearly until the vortex formation at the tear-off edge 13 of the airfoil 3 or other turbulence elements becomes so great that a significant backpressure results therefrom. But this can be achieved by an advantageous embodiment of the particular
  • Tear-off edge 13 and by forming circular inlet 12 and outlet 21 can be reduced, so that at speeds of at least 10,000 rev / min, a linear pressure increase occurs.
  • the flow rate per unit of time can also be increased at the same time, but this is limited by the cross-sectional areas of the passage openings 5.
  • the medium located therein is also accelerated to a circular path around the rotor 2. Although this is decelerated by a certain vortex formation during the suction, so that it can not be accelerated to the peripheral speed of the rotor 2.
  • the differential pressure between the peripheral speed of the airfoil and the medium flowing past, which is necessary for generating negative pressure is reduced, as a result of which the negative pressure and thus also the flow rate are reduced.
  • a plurality of longitudinal elements 25 are provided within the outlet chamber 21 transversely to the direction of rotation 18 of the rotor 2.
  • the arrangement of the longitudinal elements 25 in the outlet chamber 21 is shown in detail in Fig. 3 of the drawing. 3 of the drawing shows an open housing part 7, in which a driven pump rotor 2 is arranged, around which are provided coaxially as longitudinal elements eight longitudinal ribs 25.
  • the rotor 2 corresponds to the rotor according to FIGS. 1 and 2 of the drawing, except that this is shown in FIG. 3 of the drawing has only eight airfoil elements 3.
  • This rotor 2 is rotatably mounted in a bearing ring 23.
  • annular housing flange 24 is connected, which is at the same time a part of the pump housing 7 or rotor housing 7.
  • recesses 29 are provided, are inserted into the radial fits 26 of the longitudinal ribs 25 in order to fix them between the other, not shown, housing flange on the axially opposite rotor side.
  • the eight longitudinal ribs 25 are arranged radially and symmetrically to the axis of rotation.
  • the longitudinal ribs 25 are preferably formed as a linear flat rectangular bars whose edges are rounded aerodynamically, with the direction of rotation 18 facing radial surfaces 27 are formed slightly concave.
  • a longitudinal rib 25 is already sufficient to improve the flow rate compared to a free outlet chamber 21.
  • an arrangement of a plurality of longitudinal ribs 25 has been found to be advantageous, wherein these are preferably arranged at an angular distance of the convex elevations 19.
  • the longitudinal ribs 25 are preferably arranged so that between the convex elevations 19 and the radially inner longitudinal rib surfaces only a small distance of about 0.5 - 1.0 mm is provided. This will be in This rotor position reaches a certain sealing effect at maximum negative pressure build-up, through which the medium water is sucked through the passage openings 5 into the outlet chamber 21 with maximum flow rate.
  • the longitudinal ribs 25 could also be formed on the inner circumferential surface 22 of the housing 7 in order to prevent the circulating acceleration of the medium in the outlet chamber 21.
  • the longitudinal ribs 25 could also be formed on the inner circumferential surface 22 of the housing 7 in order to prevent the circulating acceleration of the medium in the outlet chamber 21.
  • it must be ensured that the medium to be pumped from the separate
  • Partial areas of the outlet chamber 21 can be discharged either laterally or radially to the outflow opening 11.
  • FIG. 4 of the drawing A particular embodiment of the rotor housing 7 with longitudinal elements 26 is shown in Fig. 4 of the drawing, which is preferably provided for a pressure turbine.
  • This rotor housing part 7 consists of a closed cylindrical tube part 30, on the inner circumferential surface 22 slightly coiled longitudinal elements 25 are arranged.
  • this rotor housing part 7 coaxially surrounds the rotor 2, not shown, and forms the outlet chamber 21 with the outer jacket surface 4 of the rotor 2.
  • Twelve longitudinal ribs 25, which are provided for a rotor 2 with twelve airfoil profile elements 3, are symmetrically distributed on the inner jacket surface 22 ,
  • the individual longitudinal ribs 25 are preferably concave on both radial surfaces 27 in order to prevent a radial flow and a strong turbulence.
  • an axially offset negative pressure build-up which causes an axial acceleration of the medium by the coiled longitudinal ribs 25. Therefore, one side of the rotor housing 7 is to be formed as an outlet opening 11, which allows a turbine-like discharge of the medium.
  • the formation of the housing part 7 with the slightly coiled longitudinal ribs 25 is particularly suitable for turbine drive of watercraft.

Abstract

L'invention concerne une turbomachine pourvue d'un rotor (2) tournant dans un milieu gazeux ou liquide, lequel rotor présente, au moins sur une de ses surfaces latérales externes (4), une surface portante profilée (3) pourvue d'au moins une élévation convexe (19). A l'intérieur du rotor (2), se trouve une cavité axiale (6) reliée à au moins une chambre (12, 21) pour l'introduction ou l'évacuation du milieu. Au moins une ouverture de passage (5) est ménagée entre la cavité (6) et la surface latérale externe (4) au niveau de la surface portante profilée (3). L'invention se caractérise en ce que le rotor (2) est monté dans un boîtier fixe (7), des éléments longitudinaux (25) étant disposés coaxialement autour du rotor (2) et transversalement au sens de rotation (18).
PCT/EP2008/000211 2007-01-16 2008-01-12 Turbomachine à rotor entraîné WO2008086987A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007003088A DE102007003088B3 (de) 2005-10-19 2007-01-16 Strömungsmaschine in einem angetriebenen Rotor
DE102007003088.8 2007-01-16

Publications (1)

Publication Number Publication Date
WO2008086987A1 true WO2008086987A1 (fr) 2008-07-24

Family

ID=39323835

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/000211 WO2008086987A1 (fr) 2007-01-16 2008-01-12 Turbomachine à rotor entraîné

Country Status (1)

Country Link
WO (1) WO2008086987A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126250B (de) * 1954-03-25 1962-03-22 Emil Julius Ask Kreiselpumpe mit einem Laufrad, dessen Schaufelkanaele nach dem Umfang hin in ihrer lichten Weite abnehmen
DE3628547A1 (de) * 1986-08-22 1988-03-03 Hans Kohl Geblaese zum foerdern von gasen
DE19626896A1 (de) * 1996-07-04 1998-01-08 Mayer Gmbh Geb Lüfter
WO2005093930A1 (fr) * 2004-03-26 2005-10-06 Valeo Equipements Electriques Moteur Machine electrique tournante, notamment alternateur de vehicule automobile, dont les entrees/sorties d’air comprennent des ailettes inclinees par rapport aux pales des ventilateurs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126250B (de) * 1954-03-25 1962-03-22 Emil Julius Ask Kreiselpumpe mit einem Laufrad, dessen Schaufelkanaele nach dem Umfang hin in ihrer lichten Weite abnehmen
DE3628547A1 (de) * 1986-08-22 1988-03-03 Hans Kohl Geblaese zum foerdern von gasen
DE19626896A1 (de) * 1996-07-04 1998-01-08 Mayer Gmbh Geb Lüfter
WO2005093930A1 (fr) * 2004-03-26 2005-10-06 Valeo Equipements Electriques Moteur Machine electrique tournante, notamment alternateur de vehicule automobile, dont les entrees/sorties d’air comprennent des ailettes inclinees par rapport aux pales des ventilateurs

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