EP1898100A1 - Dispositif de guidage de fluide - Google Patents

Dispositif de guidage de fluide Download PDF

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Publication number
EP1898100A1
EP1898100A1 EP06119175A EP06119175A EP1898100A1 EP 1898100 A1 EP1898100 A1 EP 1898100A1 EP 06119175 A EP06119175 A EP 06119175A EP 06119175 A EP06119175 A EP 06119175A EP 1898100 A1 EP1898100 A1 EP 1898100A1
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EP
European Patent Office
Prior art keywords
funnel
guiding means
fluid
shaped guiding
swirl pipe
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Withdrawn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
EP06119175A
Other languages
German (de)
English (en)
Inventor
Henrik Hoffmann
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.)
Hh Ide V/ Henrik Hoffmann
Original Assignee
Hh Ide V/ Henrik Hoffmann
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 Hh Ide V/ Henrik Hoffmann filed Critical Hh Ide V/ Henrik Hoffmann
Priority to EP06119175A priority Critical patent/EP1898100A1/fr
Publication of EP1898100A1 publication Critical patent/EP1898100A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04D29/548—Specially 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • 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 present invention relates to a fluid guide for controlling a flow of fluid from a reservoir to a pump having a pump inlet and a pump outlet.
  • Fluid guides are used in various places for conducting a fluid in e.g. a desired direction or in a desired amount or velocity. Fluid guides are often seen as individual guide vanes but could also be placed in tubes. E.g. in airplane turbines the guide vanes could be located between the fans in order to achieve a flow with a high pressure. In pumping tasks, individual guide vanes are typically seen to steady the fluid in order to minimise the creation of vortices.
  • High capacity pumps with a capacity of more than 10 m 3 /minute are often heavy structures which necessitates specialized crane vehicles or similar lifting equipment when moved. This means that the weight and size of the pump is critical in relation to getting the pump in the specific needed place. Critical time could be lost when waiting for such cranes or specialized vehicles.
  • a reduction in total weight of the pump and fluid guide minimizes the need for such special lifting equipment.
  • An efficient fluid guide increases the maximal pumping volume of a pump and hence a less heavy pump is needed for a specific pumping task.
  • the pump In emergency pumping tasks e.g. during flooding or fire as well as in general farming and waste water pumping tasks the pump should be capable of handling larger impurities in the fluid such as small rocks manure particles and similar.
  • the pump In order to ensure the maximal output from a pump, it is essential that the fluid supply is sufficient. Hence, it is of importance that the pump has an inlet system that ensures a sufficient fluid input to the impeller in order to achieve the maximal output. Often, the inlet is limiting the maximum output of the pump because the fluid is conducted to the impeller in an inefficient way. This is due to the fact that the inlet is a compromise against the characteristics of the pump, production facilities and the cost of the production of the inlet. Therefore, a fluid guide can be adapted to the pump thereby increasing the e.g. the maximal pumping volume.
  • European patent no. 1571349 describes an inlet housing for a pump, using guide vanes to get a desired flow of fluid.
  • the guide vanes are fixed between two thin walls.
  • this inlet housing does not give the opportunity easily to remove such blocking objects.
  • these guide vanes have the same cross sectional area from their inlet to their outlet and thus, they do not increase the velocity of the fluid along the path to the impeller.
  • US patent no. 5,501,572 discloses an inlet housing including an inlet funnel, where said inlet funnel has a perforated sidewall. This perforated sidewall does not give the effect of guiding the fluid to an angular velocity. Furthermore, an inlet funnel of perforated material would function as a filter in which impurities would easily get stuck.
  • a fluid is defined as liquids, gasses or plasmas.
  • Reservoirs containing these fluids could be both well-defined containers e.g. as well as less precise defined volumes as e.g. a pool of liquid during a flooding.
  • rooms or buildings containing gasses or plasmas are also defined as reservoirs.
  • the fluid guide comprises a swirl pipe defining an axis, a first end with a first cross-sectional area, and a second end in communication with a pump inlet.
  • Said first end of said swirl pipe is in communication with at least one funnel-shaped guiding means having an circumferential exterior wall, said at least one funnel-shaped guiding means serves for guiding the fluid into the swirl pipe.
  • the at least one funnel-shaped guiding means has an inlet opening and an outlet opening, said outlet opening communicates through a funnel body with the first end of the swirl pipe.
  • the cross-sectional area of the inlet opening of the at least one funnel-shaped guiding means is larger than the cross-sectional area of the outlet-opening of the at least one funnel-shaped guiding means, and the total cross-sectional areas of the outlet openings of the at least one funnel-shaped guiding means is substantially equal to the first cross-sectional area of the swirl pipe.
  • the funnel-shaped guiding means ensures that the velocity of the fluid is effectively increased while the fluid is led from the reservoir to a swirl pipe.
  • the angular velocity and the increased overall velocity in the swirl pipe allows the fluid to get in contact with the impeller in a more smooth way.
  • This smoother contact has the advantage that more fluid is transferred by each rotation of the impeller. This is possible because the angular velocity of the fluid minimizes the risk of turbulence being created behind the impeller blades. Turbulence or even cavitation strongly reduces the capacity of a pump.
  • the swirl pipe could also have a decreasing radius towards the impeller if further acceleration of the fluid is desired. Acceleration could be increased to several times the initial velocity from the first opening of the inlet of the funnel-shaped guiding means to the contact with the impeller.
  • the cross sectional area of the outlet opening of the funnel-shaped guiding means can be smaller than the inlet opening of the funnel-shaped guiding means. This ensures that the fluid being guided in the funnel-shaped guiding means is accelerated to a larger velocity when flowing towards the outlet of the funnel-shaped guiding means. Such acceleration is essential when pumping large volumes of fluid.
  • the outlet opening of the at least one funnel-shaped guiding means is directed towards the axis of the swirl pipe in order to direct the fluid towards the impeller.
  • Fluid in a reservoir is considered to be stagnant. This has the effect, that the fluid is accelerated during its flow through the pump. This acceleration is caused by the rotation of the impeller drawing the fluid from the reservoir through a conduit e.g. a fluid guide, a tube or similar with a smaller cross sectional area than the reservoir. Since the fluid has an initial velocity of approximately 0 m/s the acceleration during the passage of the impeller is powerful. However, the faster the rotation of an impeller in relation to the velocity of the fluid, the more likely it is to generate turbulence on the backside of the impeller blades.
  • the risk of turbulence is minimized whereby the number of rotations per minute, the rotation speed, of the impeller can be increased.
  • the maximal volume to be pumped is raised.
  • the outlet opening of the at least one funnel-shaped guiding means is extended towards the axis of the swirl pipe through a curved wall part of the circumferential exterior wall.
  • a radius of curvature of the funnel-shaped guiding means ensures that the fluid being conducted is directed into the swirl pipe.
  • the curvature of the funnel-shaped guiding means is conducting the fluid in two directions.
  • the fluid is both given an angular velocity in relation to the centre axis of the swirl pipe and furthermore, the fluid is directed towards the swirl pipe in a direction parallel to the centre axis of the swirl pipe.
  • This angular velocity of the fluid in the swirl pipe is initiated by the curvature of the funnel-shaped guiding means. Having an angular velocity in the swirl pipe gives the fluid a less intense impact when the fluid changes from being drawn to the impeller to actually being in contact with or being between the blades of the impeller.
  • the cross-section of the inlet opening and the cross-section of the funnel body of the at least one funnel-shaped guiding means are rectangular.
  • the risk of vortices is minimized.
  • the rectangular cross-section prevents the fluid in the funnel-shaped guiding means to create a vortex.
  • the force that otherwise would be lost creating the vortex is kept in the flow of the fluid whereby the flow velocity is increased.
  • fluid e.g. water being drawn in a tube or into a drain creates a vortex near the inlet.
  • the number of funnel-shaped guiding means are two, and a section of the circumferential exterior wall of each of the two funnel-shaped guide means are joined in an area in or in an area above the first opening of the swirl pipe.
  • a delimiting adjacent wall is located between the funnel-shaped guiding means.
  • the delimiting wall ensures that the fluid from the funnel-shaped guiding means is guided in a desired direction.
  • the delimiting wall could also be curved or tilted in relation to the centre axis of the swirl pipe.
  • the funnel-shaped guiding means in such way that the same wall on the one side is acting in one funnel-shaped guiding means and on the other side is acting in a second funnel-shaped guiding means. This way it is possible to minimize the amount of raw material necessary.
  • the cross-section of the inlet opening of the funnel-shaped guiding means is larger than the first cross-sectional area of the swirl pipe.
  • the fluid guide could comprise a number of funnel-shaped guide means larger than two, and that a section of the circumferential exterior wall of two adjacent funnel-shaped guide means are joined in or above the first opening of the swirl pipe.
  • funnel-shaped guiding means with a smaller cross-sectional area decreases the risk of vortices occurring in the guiding means. Furthermore, when placing the fluid guide on a substantially flat surface e.g. concrete, a higher number of funnel-shaped guiding means will ensure that the fluid guide and accordingly the pump provided with the fluid guide, is firmly placed on said surface.
  • section of the circumferential exterior wall, which is joined to an adjacent section of an e circumferential exterior wall could be made of a different material than the rest of the circumferential exterior wall.
  • the adjacent wall is of a different material e.g. wear resistant rubber. This makes it possible to remove an impurity that otherwise would get stock.
  • the fluid being pumped could be in an unknown condition, giving that it could contain large impurities hidden for the operator of the pump. This makes it essential for the operator to be able to easily remove material obstructing the optimal pumping task.
  • the matter of having a filter at the inlet is a matter of a compromise because the filter could be blocked by soft particles that would do no harm to the pump.
  • the inlet opening of the at least one funnel-shaped guide means has a collar extending from the circumferential exterior wall of the funnel-shaped guiding means, in which case it has been demonstrated that the fluid is led with less turbulence than guiding means without a collar. When turbulence is avoided the volume of fluid conducted in the funnel-shaped guiding means is increased.
  • the invention is described below by way of example with the assumption that the fluid being pumped is water.
  • the fluid guide can be used with various fluids including liquids, gasses and mixtures thereof.
  • fluids containing larger impurities e.g. wastewater are to be led through a fluid guide according to the present invention.
  • Figure 1 shows a fluid guide 1 mounted on a pump 2 (shown schematically) submerged in a reservoir 18. It is seen that the fluid guide 1 is acting as a base for the pump 2.
  • the funnel-shaped guiding means 4 leads the water to the swirl pipe 3 and the swirl pipe 3 leads the water to the pump inlet 16. Finally, the water is pumped through the pump outlet 17 to a desired location through the fluid tube 19.
  • Such fluid tube 19 could be of various types and be flexible or rigid. Indicated by the group of arrows A and the group of arrows A' the pump 2 draws the fluid from the reservoir to the fluid guide 1.
  • Figure 2 shows in perspective view a fluid guide 1 having two funnel-shaped guiding means 4.
  • the curved wall parts 7, a part of the circumferential exterior wall 20, gives the water an angular velocity perpendicular to the centre axis 9 of the swirl pipe 3.
  • the curved wall part 7' a part of the circumferential exterior wall 20 guides the water in a substantially 90° turn towards the swirl pipe 3.
  • the water enters the funnel-shaped guiding means 4 through the inlet opening 14 of the funnel-shaped guiding means and leaves the fluid guide 1 through the second 13 of the swirl pipe 3.
  • the water will have an angular velocity in relation to the centre axis 9 of the swirl pipe 3.
  • Figure 3A and 3B shows a horizontal cross sectional view of the fluid guide 1 shown in figure 2, figure 3B also showing the flow of water.
  • the two funnel-shaped guiding means 4 each have an inlet 14 each with a collar 6.
  • the collar 6 gives a smooth guiding of the water into a funnel body 5 of the funnel-shaped guiding means 4.
  • the funnel body 5 is a section of the funnel-shaped guiding means 4 of which the cross sectional area reduced towards the outlet opening 15 of the funnel-shaped guiding means.
  • the fluid guide 1 For mounting the fluid guide 1 onto a pump inlet 16 (not shown) the fluid guide 1 has a flange 11. Mounting the fluid guide 1 onto a pump could be carried out in various ways e.g. by bolts or by welding.
  • the water When the fluid guide 1 is submerged in a pool of water and pumping is initiated, the water will be drawn towards the centre of the fluid guide 1. The water will pass the collar 6 of the funnel-shaped guiding means 4 to the funnel body 5 of the funnel-shaped guiding means and finally the water will be given an angular velocity in relation to the centre axis 9 of the swirl pipe by means of the curved walls 7 while being led into the swirl pipe 3 by the curved walls 7'.
  • the velocity of the water flow will increase during the passage of the funnel-shaped guiding means 4 to obtain the highest velocity at the first end 12 of the swirl pipe.
  • the adjacent wall 8 is a shared part of both funnel-shaped guiding means 4. Seen in the cross sectional view of figure 3A and 3B showing the fluid guide having two funnel-shaped guiding means, the extent of adjacent wall 8 is defined by the diameter of the swirl pipe 3.
  • the adjacent wall 8 is ensuring that the water from one funnel-shaped guiding means 4 does not disturb the flow of the water in the other funnel-shaped guiding means 4. Because the water is also given a direction along the centre axis of the swirl pipe 3 the resulting flow of water has both an angular velocity and a direction along the centre axis of the swirl pipe 3.
  • the adjacent wall 8 could be made of a different material than the rest of the fluid guide 1, hence insuring that impurities could easily be removed.
  • the adjacent wall 8 is the part of the funnel-shaped guiding means 4 situated in or above the swirl pipe 3 parallel to the centre axis 9 of the swirl pipe 3.
  • Figure 4 shows a vertical cross sectional view parallel to the adjacent wall 8 of the fluid guide 1 shown in figure 3.
  • the fluid will enter the funnel-shaped guiding means 4 at the inlet 14 of the funnel-shaped guiding means.
  • the fluid is guided through the body 5 of the funnel-shaped guiding means and at the arrows B" said fluid exits the funnel-shaped guiding means 4 through the outlet 15 of the funnel-shaped guiding means 4 and said fluid is directed towards the first end 12 of the swirl pipe by a curved wall part 7' .
  • the water exits the swirl pipe 3 through the second end 13 of the swirl pipe 3 into a pump 2.
  • the curved wall 7' of the funnel-shaped guiding means 4 changes the direction of the water from following the substantial direction of the funnel-shaped guiding means 4 to following the centre axis 9 of the swirl pipe.
  • figure 5 shows an embodiment having five funnel-shaped guiding means 4.
  • the total area of the inlet openings 14 of the funnel-shaped guiding means 4 is larger in relation to the area of the outlet opening 15 of the funnel-shaped guiding means 4, so that a very large amount of water can be accelerated to the pump.
  • the function of the funnel-shaped guiding means 4 is the same as described for the embodiment in figures 1 to 4 and it therefore not described in details again.
  • the number of funnel-shaped guiding means could be any number.
  • the fluid guide could be manufactured from various materials e.g. metal, plastic or composites.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP06119175A 2006-08-18 2006-08-18 Dispositif de guidage de fluide Withdrawn EP1898100A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06119175A EP1898100A1 (fr) 2006-08-18 2006-08-18 Dispositif de guidage de fluide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06119175A EP1898100A1 (fr) 2006-08-18 2006-08-18 Dispositif de guidage de fluide

Publications (1)

Publication Number Publication Date
EP1898100A1 true EP1898100A1 (fr) 2008-03-12

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EP06119175A Withdrawn EP1898100A1 (fr) 2006-08-18 2006-08-18 Dispositif de guidage de fluide

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012027451A2 (fr) 2010-08-24 2012-03-01 Qwtip Llc Système et procédé de revitalisation et de traitement de l'eau
EP2520806A1 (fr) * 2011-05-06 2012-11-07 Grundfos Management a/s Groupe motopompe
US10464824B2 (en) 2012-02-28 2019-11-05 Qwtip Llc Gas production system and method
US10463993B2 (en) 2011-08-24 2019-11-05 Qwtip Llc Water treatment system and water
US10576398B2 (en) 2011-08-24 2020-03-03 Qwtip Llc Disk-pack turbine
US10682653B2 (en) 2011-08-24 2020-06-16 Qwtip Llc Disk-pack turbine
US10790723B2 (en) 2010-08-24 2020-09-29 Qwtip Llc Disk-pack turbine
US10807478B2 (en) 2012-02-29 2020-10-20 Qwtip Llc Levitation and distribution system and method
US11339767B2 (en) 2010-08-24 2022-05-24 Qwtip Llc Disk array and disk-pack turbines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB319506A (en) * 1928-10-06 1929-09-26 Hugh Ralph Lupton Improvements in or relating to axial flow and centrifugal pumps
DE1119670B (de) * 1958-09-25 1961-12-14 Klein Schanzlin & Becker Ag Vertikalpumpe mit Einlaufkegel fuer Brunnen u. ae.
US5501572A (en) * 1993-05-03 1996-03-26 Ksb Aktiengesellschaft Inlet housing for centrifugal pumps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB319506A (en) * 1928-10-06 1929-09-26 Hugh Ralph Lupton Improvements in or relating to axial flow and centrifugal pumps
DE1119670B (de) * 1958-09-25 1961-12-14 Klein Schanzlin & Becker Ag Vertikalpumpe mit Einlaufkegel fuer Brunnen u. ae.
US5501572A (en) * 1993-05-03 1996-03-26 Ksb Aktiengesellschaft Inlet housing for centrifugal pumps

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10790723B2 (en) 2010-08-24 2020-09-29 Qwtip Llc Disk-pack turbine
EP2609040A4 (fr) * 2010-08-24 2018-07-04 Qwtip LLC Système et procédé de revitalisation et de traitement de l'eau
US11339767B2 (en) 2010-08-24 2022-05-24 Qwtip Llc Disk array and disk-pack turbines
WO2012027451A2 (fr) 2010-08-24 2012-03-01 Qwtip Llc Système et procédé de revitalisation et de traitement de l'eau
EP2520806A1 (fr) * 2011-05-06 2012-11-07 Grundfos Management a/s Groupe motopompe
WO2012152599A1 (fr) * 2011-05-06 2012-11-15 Grundfos Management A/S Groupe pompe-moteur
US11045750B2 (en) 2011-08-24 2021-06-29 Qwtip Llc Water treatment system and method
US11759730B2 (en) 2011-08-24 2023-09-19 Qwtip Llc Water treatment system
US10576398B2 (en) 2011-08-24 2020-03-03 Qwtip Llc Disk-pack turbine
US11919011B2 (en) 2011-08-24 2024-03-05 Qwtip Llc Retrofit attachments for water treatment systems
US10463993B2 (en) 2011-08-24 2019-11-05 Qwtip Llc Water treatment system and water
US11141684B2 (en) 2011-08-24 2021-10-12 Qwtip Llc Water treatment system and method
US10682653B2 (en) 2011-08-24 2020-06-16 Qwtip Llc Disk-pack turbine
US11628384B2 (en) 2011-08-24 2023-04-18 Qwtip Llc Water processing system and arrangement
US11344898B2 (en) 2011-08-24 2022-05-31 Qwtip Llc Disk-pack turbine for water treatment systems
US10464824B2 (en) 2012-02-28 2019-11-05 Qwtip Llc Gas production system and method
US11192798B2 (en) 2012-02-28 2021-12-07 Qwtip Llc Gas production method using water as the source
US11780743B2 (en) 2012-02-28 2023-10-10 Qwtip Llc Disk-pack turbine
US11814302B2 (en) 2012-02-28 2023-11-14 Qwtip Llc Water dissociation system
US10807478B2 (en) 2012-02-29 2020-10-20 Qwtip Llc Levitation and distribution system and method

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