EP2932105B1 - Dispositif de pompe ayant un élément de guidage d'écoulement - Google Patents

Dispositif de pompe ayant un élément de guidage d'écoulement Download PDF

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Publication number
EP2932105B1
EP2932105B1 EP13795499.6A EP13795499A EP2932105B1 EP 2932105 B1 EP2932105 B1 EP 2932105B1 EP 13795499 A EP13795499 A EP 13795499A EP 2932105 B1 EP2932105 B1 EP 2932105B1
Authority
EP
European Patent Office
Prior art keywords
impeller
flow guide
guide element
pumping apparatus
inlet housing
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.)
Active
Application number
EP13795499.6A
Other languages
German (de)
English (en)
Other versions
EP2932105A2 (fr
Inventor
Steve MEHLHORN
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.)
Sulzer Management AG
Original Assignee
Sulzer Management AG
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
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Priority to EP13795499.6A priority Critical patent/EP2932105B1/fr
Publication of EP2932105A2 publication Critical patent/EP2932105A2/fr
Application granted granted Critical
Publication of EP2932105B1 publication Critical patent/EP2932105B1/fr
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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/181—Axial flow rotors
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/688—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for liquid 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
    • F04D3/00—Axial-flow pumps
    • F04D3/005—Axial-flow pumps with a conventional single stage rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Definitions

  • the invention relates to a pump device with a flow guide element according to the preamble of claim 1.
  • the invention is based, in particular, on the object of improving the smoothness of running of a pump, in particular when starting up and when switching off. It is achieved by a pumping device according to the invention in accordance with claim 1. Developments of the invention emerge from the dependent claims.
  • the invention is based on a pumping device, with an impeller, which is mounted rotatably about an axis of rotation for conveying a pumpable medium, with an inlet housing that spans a suction area upstream of the impeller, and with a flow guide element arranged at least partially within the suction area, which for this purpose provision is made to guide the medium flowing in the direction of the impeller, ie to prevent any recirculation that may be present or to separate it from a main flow.
  • the at least one flow guide element is at least partially in the form of a ring segment.
  • An embodiment according to the invention can therefore improve running smoothness, in particular when a pump is started up or switched off.
  • An "impeller” is to be understood in particular as a propeller for conveying the pumpable medium which runs within a pump area encompassed by the inlet housing.
  • a “pumpable medium” is to be understood as meaning, in particular, a liquid medium with a viscosity of less than 50 mm 2 s -1 , preferably less than 25 mm 2 s -1 and preferably less than 5 mm 2 s -1 .
  • a “flow guide element for guiding the medium flowing in the direction of the impeller” is to be understood in particular to mean that, during operation, the medium flows on both sides of the flow guide element in the direction of the impeller.
  • the flow guiding element forms a channel or the like which is provided to branch off part of the medium to be conveyed, such as a bypass channel leading past the impeller or a return channel in which a part of the medium is opposite to the Direction of conveyance flows.
  • a flow guide element in the form of a "ring segment” is to be understood in particular to mean that the flow guide element has an outward and / or inward curvature in at least one sub-area with respect to the axis of rotation of the impeller, which is at least essentially the same size over the entire sub-area .
  • At least essentially the same size is to be understood as meaning, in particular, that the curvature in individual points of the partial area deviates from one another by at most 10%, preferably by at most 5% and particularly advantageously by at most 1%.
  • at least partially in the form of a ring segment is to be understood in particular that the flow element has the shape of a ring segment in a partial area or is designed as a ring.
  • the term provided "is to be understood in particular to mean designed and / or equipped.
  • the flow guide element is arranged coaxially to the axis of rotation.
  • a particularly advantageous arrangement of the flow guide element can be provided for the flow pattern.
  • “arranged coaxially to the axis of rotation” is to be understood in particular to mean that the at least one flow guide element has at least the shape of a ring segment, in particular with respect to the axis of rotation of the impeller.
  • the pump device have a minimum and / or maximum distance between the inlet housing and the at least one flow guide element which is at most equal to a radius of curvature of the flow guide element.
  • the flow guide element is arranged at a sufficiently small distance from the inlet housing in order to positively influence the flow pattern.
  • the minimum distance and the maximum distance are preferably smaller than the radius of curvature of the flow guide element.
  • the flow guide element particularly advantageously has a radius of curvature which is smaller than a maximum radius at the inlet of the impeller. As a result, the flow pattern can be further improved.
  • the flow guide element is preferably at least 10% smaller than the radius of the impeller with regard to its radius of curvature.
  • the flow guide element is designed as a sheet metal component.
  • the flow guide element can be designed to be particularly simple in terms of construction.
  • a configuration made of a different material, for example a plastic is also conceivable, preferably in the form of a sheet metal component, ie with an at least substantially constant thickness, the thickness of the flow guide element being substantially less than a height and a Longitudinal direction in the circumferential direction.
  • a “thickness” should be understood to mean, in particular, a dimension in a direction which extends in the radial direction with respect to the radius of curvature of the flow guide element.
  • a “height” is to be understood in particular as a dimension in a direction which runs parallel to an axis for determining the radius of curvature of the flow guide element in relation to it.
  • the flow guide element is particularly advantageously designed in the form of a cylinder jacket surface. A structurally simple design can thereby be achieved.
  • the inlet housing forms a suction nozzle which is fluidically upstream of the impeller and in which the at least one flow guide element is at least partially arranged.
  • the flow pattern is also advantageously influenced by the inlet housing, as a result of which, in particular in interaction with the at least one flow guide element, a characteristic curve for the efficiency of the pump can be achieved that has a clear dependency between pump power and drive power.
  • the inlet housing for the formation of the suction nozzle at least one continuously having tapering portion in which the flow guide element is arranged.
  • the flow guide element which preferably influences a flow pattern in an outer region, in particular, brings about a particularly advantageous flow pattern in the suction nozzle. In this way, instabilities in the flow pattern can be avoided in a particularly advantageous manner, as a result of which critical areas in the pump characteristic curve can advantageously be avoided.
  • the inlet housing forms an end point connected upstream of the impeller, into which the at least one flow guiding element is introduced, the flow guiding element penetrating the constriction.
  • a “constriction” is to be understood in particular as a cross-sectional plane in which the suction area spanned by the inlet housing has a minimal cross-sectional area.
  • the at least one flow guide element and the inlet housing have a constant distance in at least one cross-sectional plane perpendicular to the axis of rotation of the impeller.
  • the at least one flow guide element has a shape adapted to the inwardly directed wall of the inlet housing, as a result of which an advantageous flow pattern can be achieved over the entire circumference of the flow guide element.
  • “in at least one cross-sectional plane” is to be understood in particular to mean that the distance between a cross-sectional plane is constant over the entire circumference of the flow guide element, but can be of different sizes in different cross-sectional planes.
  • a “distance” is to be understood in particular as a distance between an outer wall of the flow guide element and an inner wall of the inlet housing in the corresponding cross-sectional plane. “Constant” is to be understood in particular to mean that the distance over the entire circumference with a Tolerance of at most ⁇ 5%, preferably ⁇ 2% and particularly advantageously ⁇ 1% is the same.
  • the pump device has at least one fastening element which connects the flow guide element to the inlet housing. A simple fastening of the flow guide element can thereby be realized.
  • the at least one fastening element preferably has an at least substantially radial direction of extent in relation to the axis of rotation of the impeller. This can prevent the fastening element from significantly disrupting the flow pattern.
  • a pump with a pumping device according to the invention is proposed, which is preferably designed as a vertical pump, in which a conveying direction for the medium to be conveyed becomes perpendicular to a force of gravity acting on the medium to be conveyed.
  • a critical area in the characteristic has effects on the smooth running of the pump, whereby a pump device according to the invention is particularly advantageous for such pumps.
  • the Figures 1 to 3 show a pumping device for a pump.
  • Figure 4 shows a characteristic curve 25a in which a delivery head H is plotted against a delivery rate Q of the pump.
  • the pumping device comprises an inlet housing 12a and an impeller 10a which is arranged within the inlet housing 12a.
  • the impeller 10a is provided to convey a pumpable medium, such as, in particular, a liquid.
  • the pump is designed as a vertical pump.
  • the impeller 10a which is rotatably mounted, has an axis of rotation 11a which is preferably vertically oriented during operation, ie the axis of rotation 11a of the impeller 10a runs parallel to a force of gravity against which the pump draws in the medium.
  • a drive which the pump comprises in order to drive the impeller 10a is not shown in greater detail.
  • the pump is intended for very large pumping volumes, for example on the order of about 50,000 m 3 / h, at a low delivery head, for example between 10 m and 40 m.
  • the inlet housing 12a spans a suction area 13a, which is connected upstream of the impeller 10a.
  • the inlet housing 12a partially spans a pump region 26a in which the impeller 10a is arranged.
  • the pump is intended to be immersed in a liquid until a liquid level within the inlet housing 12a is above the impeller 10a, as a result of which the impeller 10a immersed in the liquid can suck in and convey the medium.
  • the inlet housing 12a directs this medium to be pumped in the direction of the impeller 10a.
  • a flow pattern that occurs within the suction area 13a depends in particular on a shape of the inlet housing 12a.
  • the pump device comprises a flow guide element 14a.
  • the flow guide element 14a is arranged within the suction area 13a.
  • the flow guide element 14a is designed in the form of a ring which is arranged within the inlet housing 12a.
  • the pump device has a plurality of fastening elements 21a, 22a, 23a, 24a.
  • the fastening elements 21a, 22a, 23a, 24a subdivide the flow guide element 14a into segments which each have the shape of a ring segment.
  • the fastening device comprises the four fastening elements 21a, 22a, 23a, 24a. In principle, however, a different number of fastening elements 21a, 22a, 23a, 24a is also conceivable.
  • the flow guide element 14a is arranged coaxially to the axis of rotation 11a of the impeller 10a.
  • the flow guide element 14a has a center point lying on the axis of rotation 11a, by means of which a radius of curvature 17a of the flow guide element 14a related to the axis of rotation 11a of the impeller 10a can be defined.
  • the center point defined by the radius of curvature 17a corresponds to a geometric center point.
  • the inlet housing 12a has an inner radius of curvature 27a related to the axis of rotation 11a of the impeller 10a, which is greater than the radius of curvature 17a of the flow guide element 14a.
  • the flow guide element 14a and the inlet housing 12a have an in With respect to the axis of rotation 11a extending distance 16a which is smaller than the radius of curvature 17a of the flow guide element 14a.
  • the distance 16a is smaller than the radius of curvature 17a over an entire height 19a of the flow guide element 14a of the impeller 10a.
  • the inner radius of curvature 27a of the inlet housing 12a is approximately a factor of 1.05 to 1.2 larger than the radius of curvature 17a of the flow guide element 14a, ie the distance 16a between the flow guide element 14a and the inlet housing 12a is less than 20% of the Radius of curvature 17a of the flow guide element 14a.
  • the distance 16a between the flow guide element 14a and the inlet housing 12a is thus significantly smaller than the radius of curvature 17a that the flow guide element 14a has.
  • the radius of curvature 17a of the flow guide element 14a is approximately 119 mm, for example.
  • the inner radius of curvature 27a of the inlet housing 12a is approximately 135 mm.
  • the radius of curvature 17a of the flow guide element 14a is also smaller than an outer radius 28a that the impeller 10a has (cf. Figure 3 ).
  • the outer radius 28a of the impeller 10a ie the largest radius 28a definable on the impeller 10a at the inlet, is approximately a factor of 1.2 greater than the radius of curvature 17a of the flow guide element 14a.
  • the impeller 10a has a radius 28a of approximately 145 mm.
  • An axial distance between the impeller 10a and the flow guide element 14a in the axial direction, ie along the axis of rotation 11a, is significantly smaller than the maximum radius 28a of the impeller 10a.
  • a factor between the axial distance and the maximum radius 28a of the impeller 10a is about 0.04. In principle, however, other dimensions of the impeller 10a, the inlet housing 12a and the flow guide element 14a are also conceivable.
  • the flow guide element 14a is designed as a one-piece sheet metal component (cf. Figure 2 ).
  • the flow guide element 14a has a height 19a which is directed along the axis of rotation 11a of the impeller 10a and which is substantially greater than a thickness which the flow guide element 14a in FIG a direction radial with respect to the axis of rotation 11a of the impeller 10a.
  • the thickness can, for example, be in the range of a few millimeters or less, whereas the height 19a can be several centimeters.
  • the thickness of the flow guide element 14a is essentially constant over an entire circumference of the flow guide element 14a.
  • the flow guide element 14a is designed in the form of a cylinder jacket surface, the height 19a of which is significantly smaller than its radius of curvature 17a.
  • the inlet housing 12a has a round inner cross section in a cross-sectional plane perpendicular to the axis of rotation 11a.
  • the inlet housing 12a is designed to be curved, at least in the suction region 13a, also along the axis of rotation 11a of the impeller 10a.
  • a further inner radius of curvature can be defined for the inlet housing 12a, which has a relation to an axis perpendicular to the axis of rotation 11a.
  • the inlet housing 12a preferably, but not necessarily, has a continuously tapering sub-area and a continuously widening sub-area.
  • the inlet housing 12a forms a suction nozzle due to its two curvatures, which is fluidically connected upstream of the impeller 10a.
  • the flow guide element 14a is arranged in the suction nozzle. Along the axis of rotation 11a of the impeller 10a, the flow guide element 14a is arranged partly in the continuously tapering sub-area and partly in the widening sub-area. The flow guide element 14a extends from the tapering sub-area of the suction area 13a into the again-widening sub-area.
  • the inlet housing 12a forms a constriction 20a, the inner diameter of which is smaller than a maximum diameter of the impeller 10a.
  • the inner diameter of the inlet housing 12a is at the constriction 20a minimal.
  • the flow guide element 14a is introduced into the constriction 20a.
  • the distance 16a between the inlet housing 12a and the flow guide element 14a varies along the axis of rotation 11a of the impeller 10a. It becomes minimal in the area of the bottleneck 20a.
  • the distance 16a between the flow guide element 14a and the inlet housing 12a is the same in each cross-sectional plane over the entire circumference of the flow guide element 14a. In relation to a conveying direction along which the conveyed medium flows, the distance 16a between the flow guide element 14a and the inlet housing 12a in front of and behind the constriction 20a is greater than in the constriction 20a.
  • the pump device comprises the four fastening elements 21a, 22a, 23a, 24a.
  • the fastening elements 21a, 22a, 23a, 24a are also designed as sheet metal components. In relation to the axis of rotation 11a of the impeller 10a, they have a radial direction of extent. They are arranged in a star shape with respect to the axis of rotation 11a of the impeller 10a.
  • the fastening elements 21a, 22a, 23a, 24a and the flow guide element 14a are designed separately in several parts, but firmly connected to one another. In the illustrated embodiment, they are materially connected to one another by means of a welded connection or a soldered connection.
  • connection between the fastening elements 21a, 22a, 23a, 24a and the flow guide element 14a is also conceivable, such as, in particular, a positive and / or non-positive connection by means of clamps or screws.
  • the fastening elements 21a, 22a, 23a, 24a can each have bores, by means of which the fastening elements 21a, 22a, 23a, 24a can be screwed or riveted to the inlet housing 12a.
  • an integral connection is also conceivable in the connection between the fastening elements 21a, 22a, 23a, 24a and the inlet housing 12a, for example by welding.
  • the Figure 5 shows a flow guide element 14b with fastening elements 21b, 22b, 23b, 24b for a pumping device according to the invention, which are in particular in the fastening elements 21b, 22b, 23b, 24b from the in Figure 1 illustrated embodiment differs.
  • the flow guide element 14b corresponds to that of the previous exemplary embodiment.
  • the fastening elements 21b, 22b, 23b, 24b which are arranged radially in relation to an axis of rotation 11b of an impeller (not shown in detail), are brought together in the center.
  • the fastening elements 21b, 22b, 23b, 24b thereby form a cross which acts as a suction protection for the impeller.
  • the Figure 6 shows a pump device with two flow guide elements 14c, 15c and with fastening elements 21c, 22c, 23c, 24c.
  • the fastening elements 21c, 22c, 23c, 24c are designed analogously to those of the previous exemplary embodiment.
  • the fastening elements 21c, 22c, 23c, 24c, which are arranged radially with respect to an axis of rotation 11c of an impeller 10c, are brought together in the middle and form a cross, which acts as a suction protection for the impeller 10c.
  • the two flow guide elements 14c, 15c are arranged coaxially to one another.
  • the outer flow guide element 14c corresponds to that of the exemplary embodiment from FIG Figures 1 to 3 .
  • the second flow guide element 15c differs in particular in its radius of curvature 18c from a radius of curvature 17c of the first flow guide element 14c.
  • Analogously to the first flow guide element 14c, the second flow guide element 15c is also designed in the form of a ring.
  • the radius of curvature 18c of the second flow guiding element 15c is significantly smaller than the radius of curvature 17c of the first flow guiding element 14c.
  • a factor between the larger radius of curvature 17c and the smaller radius of curvature 18c can be between 0.2 and 0.8. In the illustrated embodiment it is approximately 0.7.
  • the flow guide elements are preferably designed in the form of coaxially arranged rings. An arrangement of all flow guide elements in one plane is particularly advantageous.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (12)

  1. Un dispositif de pompage, avec une roue à aubes (10a; 10c) qui est supportée de manière rotative autour d'un axe de rotation (11a; 11b; 11c) pour convoyer un milieu pompable
    le dispositif de pompage comprenant:
    - un boîtier d'admission (12a) qui couvre une zone d'aspiration (13a) en amont de la roue à aubes (10a; 10c),
    - un élément de guidage d'écoulement (14a; 14b; 14c) disposé au moins partiellement à l'intérieur de la zone d'aspiration (13a), qui est prévu pour guider le milieu s'écoulant dans la direction de la roue à aubes (10a; 10c), dans lequel le au moins un élément de guidage d'écoulement (14a; 14b; 14c, 15c) est au moins partiellement conçu sous la forme d'un segment annulaire, avec une distance (16a) minimale et/ou maximale entre le boîtier d'admission (12a) et le au moins un élément de guidage d'écoulement (14a; 14b; 14c, 15c) qui est au plus égale à un rayon de courbure (17a; 17c; 18c) de l'élément de guidage d'écoulement (14a; 14b; 14c; 15c), caractérisé en ce que le boîtier d'admission (12a) forme un étranglement (20a) en amont de la roue à aubes (10a; 10c), dans lequel l'au moins un élément de guidage d'écoulement (14a; 14b; 14c) est introduit, dans lequel l'élément de guidage d'écoulement passe à travers l'étranglement, et dans lequel l'au moins un élément de guidage d'écoulement (14a; 14b; 14c) est placé de manière fixe dans le boîtier d'admission (12a).
  2. Le dispositif de pompage selon la revendication 1, caractérisé en ce que l'élément de guidage d'écoulement (14a; 14b; 14c, 15c) est disposé coaxialement à l'axe de rotation (11a; 11b; 11c).
  3. Le dispositif de pompage selon l'une des revendications précédentes, caractérisé en ce que l'élément de guidage d'écoulement (14a, 14b; 14c, 15c) présente un rayon de courbure (17a; 17c, 18c) qui est plus petit qu'un rayon maximal (28a) de la roue à aubes (10a; 10c).
  4. Le dispositif de pompage selon l'une des revendications précédentes, caractérisé en ce que l'élément de guidage d'écoulement (14a; 14b; 14c, 15c) est conçu comme un composant en tôle.
  5. Le dispositif de pompage selon l'une des revendications précédentes, caractérisé en ce que l'élément de guidage d'écoulement (14a; 14b; 14c, 15c) présente une hauteur (19a) orientée le long de l'axe de rotation (11a; 11b; 11c) de la roue à aubes (10a; 10c), qui est sensiblement plus petit qu'un rayon de courbure (17a; 17c, 18c) de l'élément de guidage de l'écoulement (14a; 14b; 14c, 15c).
  6. Le dispositif de pompage selon l'une des revendications précédentes, caractérisé en ce que l'élément de guidage d'écoulement (14a; 14b; 14c, 15c) est conçu sous la forme d'une surface d'enveloppe du cylindre.
  7. Le dispositif de pompage selon l'une des revendications précédentes, caractérisé en ce que le boîtier d'admission (12a) forme une buse d'aspiration en relation fluidique en amont de la roue à aubes (10a; 10c).
  8. Le dispositif de pompage selon la revendication 7, caractérisé en ce que le boîtier d'admission (12a) présente au moins une partie se rétrécissant de façon continue pour former la buse d'aspiration.
  9. Le dispositif de pompage selon l'une des revendications précédentes, caractérisé en ce que l'au moins un élément de guidage d'écoulement (14a; 14b; 14c, 15c) et le boîtier d'admission (12a) présentent une distance constante (16a) dans au moins un plan de section transversale perpendiculaire à l'axe de rotation (11a; 11b; 11c) de la roue à aubes (10a; 10c).
  10. Le dispositif de pompage selon l'une des revendications précédentes, caractérisé par au moins un élément de fixation (21a-24a; 21b-24b; 21c-24c) qui connecte l'élément de guidage d'écoulement (14a; 14b; 14c, 15c) au boîtier d'admission (12a).
  11. Le dispositif de pompage selon la revendication 10, caractérisé en ce que l'au moins un élément de fixation (21a-24a; 21b-24b; 21c-24c) présente une direction d'extension au moins sensiblement radiale par rapport à l'axe de rotation (11a; 11b; 11c) de la roue à aubes (10a; 10c).
  12. Une pompe avec un dispositif de pompage selon l'une des revendications précédentes.
EP13795499.6A 2012-12-14 2013-11-26 Dispositif de pompe ayant un élément de guidage d'écoulement Active EP2932105B1 (fr)

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EP12197150 2012-12-14
PCT/EP2013/074664 WO2014090559A2 (fr) 2012-12-14 2013-11-26 Dispositif de pompage comportant un élément de guidage d'écoulement
EP13795499.6A EP2932105B1 (fr) 2012-12-14 2013-11-26 Dispositif de pompe ayant un élément de guidage d'écoulement

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EP2932105B1 true EP2932105B1 (fr) 2021-04-21

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EP (1) EP2932105B1 (fr)
CN (1) CN104995411B (fr)
BR (1) BR112015012357A2 (fr)
ES (1) ES2866725T3 (fr)
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WO2014090559A3 (fr) 2014-09-25
IN2015DN03297A (fr) 2015-10-09
WO2014090559A2 (fr) 2014-06-19
US20150300371A1 (en) 2015-10-22
EP2932105A2 (fr) 2015-10-21
CN104995411B (zh) 2018-11-06
ES2866725T3 (es) 2021-10-19
BR112015012357A2 (pt) 2017-07-11
US10634165B2 (en) 2020-04-28
CN104995411A (zh) 2015-10-21

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