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
  • F04D13/00—Pumping installations or systems
  • F04D13/02—Units comprising pumps and their driving means
  • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
  • E04H4/00—Swimming or splash baths or pools
  • E04H4/12—Devices or arrangements for circulating water, i.e. devices for removal of polluted water, cleaning baths or for water treatment
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B69/00—Training appliances or apparatus for special sports
  • A63B69/0093—Training appliances or apparatus for special sports for surfing, i.e. without a sail; for skate or snow boarding
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B69/00—Training appliances or apparatus for special sports
  • A63B69/12—Arrangements in swimming pools for teaching swimming or for training
  • A63B69/125—Devices for generating a current of water in swimming pools
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D13/00—Pumping installations or systems
  • F04D13/16—Pumping installations or systems with storage reservoirs
• • 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
  • F04D29/04—Shafts or bearings, or assemblies thereof
  • F04D29/043—Shafts
• • 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
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/52—Casings; Connections of working fluid for axial pumps
  • F04D29/528—Casings; Connections of working fluid for axial pumps 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
  • F04D3/00—Axial-flow pumps
  • F04D3/005—Axial-flow pumps with a conventional single stage rotor
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
  • A63B71/02—Games or sports accessories not covered in groups A63B1/00 - A63B69/00 for large-room or outdoor sporting games
  • A63B71/023—Supports, e.g. poles
  • A63B2071/025—Supports, e.g. poles on rollers or wheels

Definitions

• the present invention relates to the field of hydraulic pumps, and in particular to that of water pumps.
• the invention applies preferentially, but not exclusively to the practice of aquatic activities requiring the creation of a current.
• the invention can be applied to an aquatic activity zone where the water is projected by one or more pumps on a surface of evolution, so that a person lying on this surface can slide on the water that is projected there, for example using a board, a buoy or the like.
• the surface of evolution can take any form, preferably by defining a slope, possibly progressive.
• the surface of evolution can be horizontal, with in this case the preferential implementation of a rudder which the person moving on the surface can hold.
• the invention is intended to recreate fully artificial aquatic conditions, or semi-artificial by placing in a natural water capacity, such as a lake, a pond, a river, an inlets, etc.
• a natural water capacity such as a lake, a pond, a river, an inlets, etc.
• Another example application for the pump according to the invention is that of the formation of a jet in the open air, for example for a fountain.
• the invention applies to any hydraulic pump for lifting or transporting water.
• the passage from the circular section to the flattened section takes place at an outlet section of the housing, centered on the liquid outlet axis.
• it is even generally an adaptive section adapter that is attached to a circular outlet of the pump.
• this shape transition In order to be able to benefit from a powerful laminar jet at the pump outlet, this shape transition must be progressive. In addition, once the shape of the exit section obtained within the circulation channel, this section must be kept over a large casing length before the outlet port. This generates a large footprint in the direction of the liquid outlet axis, so that the design of such pumps remains to be optimized.
• the object of the invention is therefore to remedy at least partially the disadvantages mentioned above, relating to the embodiments of the prior art.
• the subject of the invention is a hydraulic pump comprising a pump shaft and a housing defining a liquid circulation channel. having an exit orifice of flattened section and being oriented so that the liquid escapes along a liquid outlet axis inclined relative to a longitudinal axis of the pump shaft passing through said housing, the latter comprising a first section whose inner surface is of circular section centered on said longitudinal axis and surrounding a pump impeller carried by the pump shaft.
• said first section has a downstream end from which the section of the inner surface of the casing flattens.
• the invention therefore has the particularity of initiating the flattening of the section very upstream in the circulation channel, at the portion of the housing which surrounds the pump shaft. This advantageously results in a substantial reduction in the size of the pump in the direction of the liquid outlet axis, while allowing the formation of a powerful laminar jet at the pump outlet.
• the flattened section of the outlet orifice may have any shape having a large dimension and a small dimension, the ratio between the two may for example be of the order of 2 to 15. It is preferentially, but not exclusively of a generally rectangular or elliptical shape. For the general rectangular shape, it may have rounded corners and / or one or more curved sides, inward or outward.
• the purpose of this flattened section is to deliver at the pump outlet a "stretched" laminar jet, which is for example perfectly adapted to be dispensed on a surface of evolution of a zone of aquatic activity.
• the housing comprises a second section arranged in the continuity of the first section, the second section having an inner surface of evolutive section flattening and being entirely arranged around the pump shaft, and preferably being centered over its entire length on the longitudinal axis. In other words, this second section does not pass through the pump shaft.
• the section of the inner surface of the downstream end of the second section is identical to that of the outlet port of the pump.
• the section of the housing preferably has an identical shape, that is to say invariable.
• the section of the inner surface of the downstream end of the second section could be of homothetic shape with respect to that of the outlet port of the pump, being larger or smaller.
• the section of the inner surface of the downstream end of the second section could be different from that of the outlet orifice of the pump, with in this case a section of the casing whose shape would continue to evolve downstream of the second section, to reach the desired flattened section. This evolution of shape could then continue at the downstream elements of the housing, such as a bend and / or an outlet section.
• the housing preferably comprises a bend arranged in the continuity of the second section, and an outlet section arranged in the continuity of the bend.
• said elbow and the outlet section preferably have an inner surface of the same section, corresponding to that of the inner surface of the downstream end of the second section.
• the section of the latter does not evolve, which allows to benefit from an important channel length causing the liquid to be in very good conditions to deliver a laminar jet stretched without actually affecting the overall size of the pump in the direction of the liquid outlet axis.
• the pump shaft passes through said housing at the elbow.
• said flattened section of the outlet orifice takes a generally rectangular or elliptical shape.
• the pump comprises a system for supporting the pump shaft placed in said circulation channel, the system comprising a support structure integral with the casing and a bearing for rotating the pump shaft carried by the support structure.
• the system has a casing opening from which a pump shaft passage duct extends into said pump channel. flow to the shaft support system, the pump shaft freely extending through said conduit.
• the passage duct takes the form of a well traversed with clearance by the pump shaft, which is only guided in rotation at its portion located in the continuity of the bottom of this well, by the bearing of support system.
• the pump shaft has, compared to the prior art, an improved angular deflection / deflection capacity to cope with any misalignment with the motor axis, without introducing excessive mechanical stress in the pump. This ensures easy coupling with the rotating part of the motor, resulting in a saving of time.
• the parts thereof do not need to be oversized, resulting in a significant weight gain.
• the invention is tolerant of possible limited amplitude misalignments between the pump shaft and the motor, manufacturing tolerances may be higher, resulting in lower manufacturing costs.
• the displacement / bending capacity described above is obtained even with a motor coupling to the pump shaft closest to the housing.
• the overall size of the pump, in the direction of the longitudinal axis of the pump shaft, can thus be particularly low.
• the pump being less mechanically stressed, maintenance operations to change the most stressed parts are greatly reduced compared to pumps in the prior art.
• the second bearing previously placed at the housing level does not have to be changed regularly since it has been removed, as well as the noise nuisance resulting from its premature wear are no longer encountered.
• This configuration thus provides an extremely satisfactory compromise between ease and speed of assembly, robustness and wear resistance, low manufacturing and maintenance costs, and limited axial space.
• the pump according to the invention is devoid of means for guiding the shaft between the same shaft and the passage duct, all along of the last. Therefore, no bearing means or the like is interposed between them, and to facilitate the movement / bending of the shaft authorized by the presence of the radial clearance.
• the passage conduit surrounding the shaft from the opening of the housing it allows to prohibit or limit the amount of liquid escaping from the circulation channel at the level where the shaft passes through the housing.
• a seal between the casing opening and the passage duct, and / or between the same duct and the support system Preferably, a leakage rate could be encountered at one and / or the other of these two junctions, even if such a flow rate is preferably not desired.
• the pump shaft is guided in rotation only by said guide bearing located in the circulation channel.
• the connecting end can be inserted directly into the rotor of the motor, or be coupled in rotation to a motor shaft.
• the guide bearing has a permeability to the liquid allowing the introduction of a flow of liquid inside an annular space between the duct passage and the pump shaft.
• it is preferentially retained a lubricated bearing. Therefore, by passing through the bearing, the liquid performs the function of cooling and / or lubrication, then possibly cooling the shaft along the annular space.
• said guide bearing is arranged near a pump impeller carried by the shaft, this impeller taking a conventional propeller or impeller shape, also called a bladed wheel, or the shape of any element. similar.
• the pump shaft has a connecting end coupled in rotation to a rotating part of a pump motor preferably intended to be emerged, the rotating part of the pump motor preferably being coaxial with the pump shaft.
• said casing is made in two half-parts, preferably enclosing between them a tube forming said shaft passage conduit.
• sealing means of the seal type or the like may be interposed between the opening of the housing and the tube.
• the duct can be made in one piece with one and / or the other of the housing half-parts.
• the invention also relates to an aquatic activity zone designed to implement a stream of water using at least one such pump.
• the aquatic activity zone comprises an evolution surface which preferably defines a slope, a water capacity, as well as at least one such pump according to the invention, and preferably several of these pumps arranged side by side. side by side, each pump being fed by said water capacity and oriented so as to project water on said surface.
• This zone thus allows the practice of an activity known as "gliding" on the water projected onto the surface of evolution.
• the fact of providing several pumps arranged next to each other makes it possible to have a jet power consequent while allowing easy implementation of the area.
• the individual pumps provided in number are more easily transportable and manipulable than a single pump with large flow.
• their implementation in the water capacity is easier, especially in the sense that these pumps can have a limited overall footprint in the vertical direction, when their pump shafts are oriented in the same direction.
• the pumps can be spaced apart from each other depending on the desired sliding width and the desired jet power.
• FIG. 1 shows a schematic side view of an aquatic activity area, according to a preferred embodiment of the present invention
• FIG. 2 represents a view from above of the aquatic activity zone of FIG. 1;
• FIG. 3 represents a perspective view of one of the pumps implemented in the aquatic activity zone represented in the preceding figures
• FIG. 4 also shows a perspective view of one of the pumps, with some hoods removed for better visibility of the constituent elements of the pump;
• FIG. 5 is a schematic view of the impounding operation of one of the pumps of the aquatic activity area
• FIG. 6 is a sectional view taken along the line VI-VI of Figure 5;
• FIG. 7 represents a perspective view of the pump shown in FIGS. 3 to 6, partially cut along a plane of symmetry of the liquid circulation channel;
• FIG. 8 represents a sectional view of a portion of the pump shown in FIG. 7, this view being taken along the line VIII - VIII of FIG. 9;
• Fig. 9 is a sectional view taken along line IX-IX of Fig. 8.
• FIG. 10 is a view similar to that of FIG. 7, in which the different sections of the liquid circulation channel have been identified;
• FIG. 11 is a front view of the pump shown in FIG. 10;
• FIG. 12a is the sectional view taken along any of lines A-A and A '-A' of FIG. 10;
• FIG. 12b is a sectional view taken along line B-B of FIG.
• FIG. 12c is the sectional view taken along any of the lines C-C, C'-C and C "-C" of FIG. 10.
• zone 1 is intended to recreate artificial conditions for practicing sports or leisure activities such as “surfing”, “bodyboarding” or “wakeboarding”, or any other similar activity in the field of skiing.
• the activity zone comprises a water capacity 2, which is here selected in an artificial basin 4.
• a water capacity 2 which is here selected in an artificial basin 4.
• it is an entirely artificial zone 1, which can be dismantled and reassembled on site, including the basin 4.
• the artificial basin 4 could alternatively be a fixed artificial basin, non-transportable, without departing from the scope of the invention.
• Zone 1 further comprises an evolution surface 6, arranged above the basin 4.
• this evolution surface 6 can be arranged at least partly in the basin 4, preferably in the upper part of the basin 4. this.
• the surface 6 defines a slope, possibly progressive.
• This slope is preferably made from an inflatable structure applying the desired slope, and on which is stretched a fabric to have a smooth surface on which the water can easily flow.
• the fabric is secured to the inflatable structure, and designed so that it stretches during the inflation of this structure.
• the zone 1 comprises a plurality of pumps particular to the present invention, these pumps 10 being arranged side by side in the direction of the width of the slope 6.
• Each pump has a portion immersed in the water capacity 2 and is arranged facing a low point of the evolution surface 6.
• the pump has an outlet orifice 12 oriented so that the liquid escapes along an axis 14 of liquid outlet parallel to the lower end of the evolution surface 6.
• each hydraulic pump 10 thus sends a laminar jet on the evolution surface 6, the water flowing upwards on the slope to a downstream end thereof at which there is a water receiving well 16, for rerouting it to the basin 4. Therefore, the water circuit of the activity zone 1 is a closed circuit.
• the activity zone 1 comprises a multitude of security elements 20 surrounding the surface of evolution 6 and avoiding a person evolving on it from accidentally extracting it.
• security elements 20 are preferably inflatable damping elements, or similar elements of the foam type. Similar elements may be provided in front of the emergent part of each pump 10, so as to prevent the person moving on the surface 6 from accidentally impacting the same pump part.
• the arrangement of the various pumps can be adapted to the needs encountered, in particular as regards their spacing, their inclination, their in the basin, or their jet orientation to create parallel and / or divergent and or convergent jets. These parameters can be set at the time of assembly, or be scalable during operation.
• the outlet orifice 14 has a flattened section, for delivering a stream of drawn water.
• flattened section it is here preferably included a section of generally rectangular or elliptical shape, of large axis parallel to the generatrix of the surface of evolution 6.
• This outlet is thus oriented along the axis 14, which is inclined relative to the longitudinal axis 22 of a pump shaft (not referenced in Figure 1), the latter being preferably vertical.
• the inclination between the axes 14 and 22 is of the order of 90 °, but more generally between 60 and 120 °, even if other values can be adopted according to the needs encountered, without departing from the scope of the present invention.
• each pump 10 in the basin 4 has gripping means 26 in the form of a loop which can be retracted within the pump outside the phases of displacement thereof.
• the pump is equipped with wheels 28 arranged at the front and rear of this pump in the direction of the axis 22, at a bottom of the pump. Therefore, the pump can be moved on a horizontal surface 30 leading to the basin 4, rolling on the same surface 30 by pushing or pulling applied from the gripping hoop 26. The pump can thus be moved by rolling with the axis 22 parallel to the support surface 30, to an end of the basin 4 at which there is provided pump support means 32 integral with the surface 30.
• These means comprise two yokes 34 each carrying a guide roller 36 from to lodge in complementary rails 38 provided on the bottom of the pump. Therefore, when one of the front wheels enters between the two clevises as shown in the left representation of Figure 5, it allows to center the pump so as to match the rollers 36 with the rails 38. These elements 36, 38 can therefore begin their cooperation before the pivoting of the pump to tilt it to 90 °, to obtain the final position in which the longitudinal axis of the pump shaft 22 is parallel to the vertical direction. This pivoting operation is performed while lowering the pump in the basin 4, by moving the rollers 36 along the rails 38.
• each pump 10 preferably each have the same design.
• each pump is intended to have a high flow rate, for example of the order of 100 to 600 m 3 / h.
• the pump 10 has a platform 40 supporting a motor 42 and below which there is a circulation channel 44 delimited by a casing 46.
• the portion intended to be emerged is that integrating the motor 42 located above the platform 40, while that the portion intended to be immersed comprising the liquid circulation channel 44 is located under this same platform 40.
• the pump is intended to be covered with protective covers, both at the level of the immersed part and at the level of the emerged part. This is for example the cover 48 shown in Figure 7, surrounding the circulation channel 44 and its housing 46 which defines it.
• the outlet orifice 12, of flattened section, is located at the downstream end of the circulation channel 44 taking a general shape of "L" returned.
• the upstream end of this channel communicates with a water suction mouth 50, of flared shape.
• This mouth 50 thus has a shape that flares outwardly, to a lower cover 48 for the penetration of water into the mouth.
• the pump 10 comprises a pump shaft 52 which is thus oriented along the longitudinal axis 22, on which it is centered.
• This shaft comprises a high end, said connecting end which is coupled in rotation to a rotating part 54 motor 42, and more specifically coupled to an output shaft 56 of this rotating part 54, also said motor shaft.
• the coupling is done by means of appropriate mechanical means 58 which take for example the shape of an Oldham seal or a cardan joint.
• These mechanical coupling means 58 are preferably located under the platform 40.
• the pump shaft 52 and the drive shaft 56 are coaxial, even if a slight misalignment between these two shafts can be tolerated by the nature of the mechanical coupling means 58, and also because of the design retained for the passage of the shaft through the housing 46, as will be explained below.
• the pump shaft 52 has a low end carrying a pump impeller 60 which takes the form of a simple propeller. This propeller is disposed in the upstream portion of the liquid circulation channel, near the mouth 50.
• a support system 64 comprising a support structure 66 fixedly mounted on the housing 46.
• This support structure 66 comprises a ferrule 68 to be plated or close to the inner surface of housing 46, ferrule from which radial arms 70 extend inwards to a bore 72 centered on axis 22.
• support system 66 includes a rotational guide bearing 74 housed in the bore 72 which carries it.
• This bearing 74 has an outer surface having circumferential grooves in which friction and sealing joints 76 are preferably arranged, in contact with the bore 72.
• the bearing 74 is located near the lower end of the housing. the shaft 52 carrying the propeller 60.
• this pump shaft 52 guides in rotation this pump shaft 52, thanks to an inner surface contacted by the same shaft.
• it is a bearing allowing the passage of a flow of cooling water and / or lubrication, taking the form of a lubricated bearing, also called lubricated bearing pad, or ring "hydrolube” .
• the pad 74 has an inner surface with very small axial grooves 80 through which water can flow along the shaft 52.
• the upper end of the pad 74 is contact tightly, preferably via an O-ring 82, through a shaft passage 84 in the form of a circular section tube centered on the axis 22.
• This tube 84 extends in the manner of a well in the circulation channel 44, from a casing opening 87 close to the mechanical connection means 58.
• the tube 84 therefore extends vertically along the axis 22 from the opening 87 to which it is sealingly connected to the water-lubricated pad 74 with which it is also provided a tight connection.
• One of the peculiarities lies in the fact that the shaft 52 passes freely through the tube 84, a radial clearance being provided so as to allow within this tube, the deflection and / or the bending of the pump shaft 52 of so as to be able to cope with a possible misalignment between this pump shaft 52 and the drive shaft 56.
• the retained radial clearance and the length of the free shaft in the tube 84 from the support system 64 are such that they allow to absorb consequent misalignments, for example of the order of one or more millimeters.
• the shaft 52 from its connecting end to its opposite end carrying the helix 60, is guided in rotation only by the hydrolublified pad 74.
• the annular space 86 between the shaft 52 and the tube 84 is preferably left completely free, allowing the evacuation of a very low flow of cooling water and / or lubrication introduced from the grooves 80 of the hydrolubeated pad 74.
• This flow rate is of course very negligible compared to the flow rate of the pump that exits through the outlet orifice 12.
• This flow is preferably evacuated by gravity from the upper end of the tube sealingly surrounded by the casing opening 87.
• the pump shaft 52 is not maintained in the axial direction by the system 64, so that it can be easily introduced / extracted during manufacture and maintenance operations.
• the assembly consisting of the motor 42 and the shaft 52 can be easily extracted / introduced axially, without further assembly / disassembly operations, and by simply sliding the shaft 52 through the inner surface of the water-lubricated pad 74.
• the pad 74 is preferably the only wearing part of the pump, which can be changed very easily from the mouth 50, simply removing the propeller 60 for access.
• the housing 46 is made of two parts, each preferably formed in one piece. These two parts are preferably symmetrical in a median vertical plane of the circulation channel 44.
• each half-shell which defines a portion of the channel 44 along the entire length thereof, is made of a non-metallic material, for example plastic or composite material. It is the same for the passage tube of the shaft 84, which could alternatively be integrated with these half-shells.
• the ferrule 68 has radial protuberances 89 which are housed in cavities 91 provided on the inner surface of the housing. This cooperation between the excrescences 89 comparable to the plates, and the cavities 91, allows locking in rotation and in translation along the axis 22, between the casing 46 and the structure 66. In addition, this allows a precise angular indexing of the support structure 66 vis-à-vis the same housing 46.
• the ring 74 is preferably made of brass, bronze or stainless steel.
• the casing has its two half-shells 46a, 46b which are assembled to one another by bolts 93 connecting casing flanges 95 provided on these two half-shells. shells.
• the circulation channel 44 is defined by a first housing section 100a of constant section. circular, centered on the axis 22. It is this section which surrounds the propeller 60 carried by the pump shaft 52. From a downstream end of this first section 100a, there is provided a second section 100b which is also centered on the axis 22. This second section 100b, located in the continuity downstream of the first section 100a, has the particularity of having an inner surface of evolutive section, the section flattening downwards.
• Figure 12a shows the shape of the section of the inner surface 102a of the first section, this circular shape being invariable between the center of the section 100a and its downstream end.
• FIG. 12b shows the inner surface 102b in the center of the second section 100b, this section having a flattened shape whose large dimension is greater than the diameter of the section shown in FIG. 12a, and whose small dimension in the direction of the height is less than this same diameter.
• the section of the inner surface 102b of this housing portion progressively changes from a circular shape to a flattened rectangular shape as shown in FIG. 12c, corresponding to the downstream end of this second section.
• a 90 ° bend 100c is in the downstream continuity of the second section 100b, and has a section which remains unchanged, and which takes the form shown in Figure 12c.
• an output section 100d is in the continuity downstream of the bend 100c, and also has an inner surface of section identical to that of the bend and the downstream end of the second section. This section is then identical to that of the outlet orifice 12 located downstream of its output section 100d. It should therefore be understood that the inner surfaces 102c and 102d of the bend 100c and the outlet section 100d have a constant section of the same shape as that shown in FIG. 12c. With regard to this of this section of constant form, the only exception lies well heard at the portion of the elbow incorporating the opening 87, even if the general rectangular shape remains in the sections of the elbow passing through the same opening 87.
• the pump 10 is capable of having a reduced bulk in the direction of the axis 14, while producing a powerful laminar jet escaping through the outlet orifice 12.
• the area of the circular section of Figure 12a is substantially similar to the area of the rectangular outlet section of Figure 12c, the ratio between these areas can be between 0.9 and 1.1.
• the ratio between the areas of the sections preferably evolves moreover in this range of values all along the circulation channel.

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• 2013
  • 2013-02-27 FR FR1351725A patent/FR3002600B1/fr not_active Expired - Fee Related
• 2014
  • 2014-02-25 BR BR112015020536-4A patent/BR112015020536B1/pt not_active IP Right Cessation
  • 2014-02-25 ES ES14706309T patent/ES2752066T3/es active Active
  • 2014-02-25 US US14/768,539 patent/US10501953B2/en not_active Expired - Fee Related
  • 2014-02-25 WO PCT/EP2014/053610 patent/WO2014131749A1/fr active Application Filing
  • 2014-02-25 EP EP14706309.3A patent/EP2961992B1/de active Active
  • 2014-02-25 AU AU2014222728A patent/AU2014222728B2/en not_active Ceased
  • 2014-02-25 PT PT147063093T patent/PT2961992T/pt unknown

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