EP3085961B1 - Mehrstufige kreiselpumpe - Google Patents

Mehrstufige kreiselpumpe Download PDF

Info

Publication number
EP3085961B1
EP3085961B1 EP15164219.6A EP15164219A EP3085961B1 EP 3085961 B1 EP3085961 B1 EP 3085961B1 EP 15164219 A EP15164219 A EP 15164219A EP 3085961 B1 EP3085961 B1 EP 3085961B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
wall part
pump according
section
head part
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
EP15164219.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3085961A1 (de
Inventor
Søren Emil Sørensen
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.)
Grundfos Holdings AS
Original Assignee
Grundfos Holdings AS
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 Grundfos Holdings AS filed Critical Grundfos Holdings AS
Priority to EP15164219.6A priority Critical patent/EP3085961B1/de
Priority to RU2016115045A priority patent/RU2637342C2/ru
Priority to US15/132,540 priority patent/US20160305445A1/en
Priority to CN201610247904.3A priority patent/CN106065861A/zh
Publication of EP3085961A1 publication Critical patent/EP3085961A1/de
Application granted granted Critical
Publication of EP3085961B1 publication Critical patent/EP3085961B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • 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
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • 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
    • F04D29/007—Details, component parts, or accessories 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
    • F04D29/42—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
    • 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
    • F04D29/4293—Details of fluid inlet or outlet
    • 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
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a multi-stage centrifugal pump with the features specified in the preamble of claim 1.
  • the starting point of the invention is formed by centrifugal pumps, as are known, for example, from the CR and CRE pump series from Grundfos. These are multi-stage, vertically operated centrifugal pumps, in which at least two pump stages are arranged in a pump housing between a foot part and a head part of the pump housing, which are surrounded on the outside by a wall part connecting the foot part to the head part. A suction and a pressure port of the centrifugal pump are formed on the foot part. The liquid to be pumped by the centrifugal pump first passes through the suction port to a first pump stage and from there to the last pump stage, from where it is returned to the foot section and is led out of the centrifugal pump via the pressure port.
  • the pump shaft of the centrifugal pump which connects the impellers of the individual pump stages, is sealingly led out through the head part, where it is motionally coupled to the motor shaft of an electric drive motor mounted axially spaced from the head part on a motor chair typically made of cast steel.
  • the motor chair is either an integral part of the head part or detachably attached to the head part, with rod bolts connecting the motor chair to the foot part.
  • a typical representative of these pump types is, for example, in WO 2014/187648 shown.
  • the object of the invention is to provide a multi-stage centrifugal pump of the type described above, which has a simplified structure and a more attractive appearance compared to the known pumps.
  • the multi-stage centrifugal pump according to the invention has a foot part and a head part, between which at least two pump stages, each with an impeller, are arranged.
  • This centrifugal pump is preferably a vertically operated centrifugal pump, that is to say a centrifugal pump which is operated standing on the base part with vertically oriented impeller axes, but it should be pointed out that the centrifugal pump according to the invention is also one in any other Location operated centrifugal pump can act.
  • the pump stages of the centrifugal pump are surrounded on the outside by a wall part which connects the foot part to the head part and thus forms a pump housing together with the foot part and the head part.
  • the centrifugal pump according to the invention has a motor chair adjoining the head part for receiving an electric motor provided for operating the centrifugal pump.
  • the electric motor is mounted on the motor chair at a distance from the head part in the direction of a central axis of the centrifugal pump, one end protruding from the head part and one with the Impellers of the pump stages connected pump shaft in the area of the motor chair can be coupled to a motor shaft of the electric motor.
  • the centrifugal pump according to the invention is characterized in that the wall part of the pump housing extends in the axial direction, that is to say in the direction of the central axis of the centrifugal pump or in the direction of its impeller axes, beyond the head part and with it Motor chair is connected to accommodate the electric motor.
  • the wall part of the pump housing extends in the axial direction, that is to say in the direction of the central axis of the centrifugal pump or in the direction of its impeller axes, beyond the head part and with it Motor chair is connected to accommodate the electric motor.
  • the centrifugal pump according to the invention it is no longer the head part but instead the wall part surrounding the pump stages of the centrifugal pump that surrounds the motor chair. This considerably increases the freedom of design with regard to the design of the centrifugal pump.
  • the wall part is preferably formed by a tube, in which the head part is incorporated, in a constructionally and technically simple manner.
  • the pipe can either be a pipe with a welded seam or a seamless pipe.
  • the tube can be produced, for example, by deep drawing, as a result of which the wall thickness of the wall part can be easily determined.
  • it is expediently connected at one end to the foot part in a pressure-tight manner.
  • the head part is inserted at a distance from this end and is likewise connected to the tube in a pressure-tight manner.
  • the head part is preferably welded into the tube in this position.
  • the welded connection of the head part and the tube can be provided within the tube or the welded connection can be made from the outside of the tube.
  • the motor chair preferably has an annular flange which is arranged at the end of the section of the wall part which extends beyond the head part.
  • the ring flange like the entire motor chair, is advantageously an aluminum injection molded part.
  • the radial dimensions of the ring flange are preferably such that the outer circumference of the ring flange is aligned with the outer circumference of the wall part, so that the ring flange only extends radially into the clearance profile or in the direction of the interior of the wall part, but does not protrude on the outside beyond the outer circumference of the wall part .
  • the ring flange is further advantageously of shoulder-shaped design, it having a section engaging in the interior of the wall part and a section resting on the end of the wall part.
  • the outer diameter of the portion engaging in the interior of the wall part expediently corresponds to the inner diameter of the wall part, so that the wall part at its free end facing away from the foot part can be supported in the radial direction on the portion engaging in the interior of the wall part, which the Motor seat forming section of the wall part gives increased stability.
  • the ring flange advantageously forms the entire motor chair.
  • an embodiment is preferred for which the ring flange is designed for fastening the electric motor.
  • the electric motor is mounted on the flat side of the ring flange facing away from the foot part.
  • the electric motor is advantageously fastened to the ring flange in the region of the ring flange which extends into the clearance profile of the wall part, where the fastening means on the ring flange side for fastening the electric motor are preferably arranged on the ring flange. These are preferably through holes which serve to receive screws with which the electric motor is screwed to the ring flange.
  • the ring flange is designed for fastening different electric motors.
  • a plurality of through holes are formed on the ring flange at a first radial distance from a central axis of the ring flange in series over the circumference of the ring flange for producing a screw connection with a counter flange of a first electric motor and in at least one of them radial distance of these through holes deviating second radial distance distributed in series over the circumference of the ring flange further through holes are provided for producing a screw connection with a counter flange of a second electric motor.
  • an attachment projecting in the axial direction can be arranged on the ring flange to form the motor chair, and a fastening flange for the electric motor is arranged on the end facing away from the ring flange.
  • This configuration proves to be advantageous, for example, when larger electric motors are used.
  • the axially protruding attachment on the ring flange enables it to pass over the top of the centrifugal pump projecting section of the wall part comparatively short, which has a positive effect on the bending and torsional rigidity of this section.
  • the fastening flange arranged on the end of the attachment facing away from the ring flange can be dimensioned such that it is arranged within the clearance profile of the wall part or, in the case of electric motors of a larger type or in the case of electric motors with a larger counter flange, to the fastening flange also radially via the Project the outer contour of the wall part.
  • At least one window is preferably formed on the section of the wall part which extends beyond the head part.
  • This window is to be understood as a larger recess provided on the wall part, via which the interior of the wall part in the region of the section forming the motor chair is accessible for maintenance and repair purposes.
  • the at least one window is thus integrated in the wall part.
  • a mechanical weakening of the wall part caused by the at least one window can have an unfavorable effect on undesired natural frequency excitation of the wall part.
  • a step aimed in this direction can consist in strengthening the wall thickness of the wall part in the section protruding beyond the head part compared to the wall thickness on the remaining wall part.
  • a cover plate of the window can be load-bearing Function.
  • the mechanical structure can also be stabilized in that corresponding mechanical deformations are formed in the wall part.
  • two windows are formed on the section of the wall part extending beyond the head part, which are arranged in such a way that a shaft seal sealing the pump shaft from the head part and at least one vent valve of the centrifugal pump arranged on the head part are accessible via the windows.
  • two vent valves are preferably provided on the head part, which are arranged together in a plane running through the central axis of the centrifugal pump and its head part on two sides facing away from the central axis.
  • the two windows formed on the wall part are expediently arranged diametrically opposite one another radially on the outside of the vent valves.
  • the head part of the centrifugal pump according to the invention is preferably designed as a deep-drawn part made of preferably stainless steel. Accordingly, a comparatively thin-walled sheet of steel and preferably of stainless steel can be used to produce the head part, which is converted into a preferably curved shape by means of a deep-drawing process. Compared to the head parts previously made from cast steel, the head part of the centrifugal pump according to the invention thus has a significantly lower weight, which typically also has a positive effect on the total weight of the centrifugal pump. When using stainless steel, the corrosion resistance of the headboard also proves to be advantageous.
  • the wall part is expediently detachably connected to the foot part for maintenance, cleaning or repair purposes.
  • this Connection is preferably provided that the wall part is clamped to the foot part with a clamping ring.
  • a section of the foot part preferably engages in an end section of the wall part facing away from the head part and the motor chair, the clamping ring surrounding the wall part radially on the outside pressing the wall part against the foot part.
  • a seal is expediently arranged between the wall part and the foot part.
  • the clamping ring used to connect the wall part to the foot part is preferably divided into a plurality of ring segments in the circumferential direction. Accordingly, the clamping ring has a plurality of ring segments, which are arranged next to one another in the circumferential direction and connected to one another, form the clamping ring.
  • This split configuration of the clamping ring is advantageous in that it enables a simple arrangement of the clamping ring on the outside of the wall part and ensures uniform power transmission from the clamping ring to the wall part.
  • the individual ring segments of the clamping ring are preferably designed in such a way that a recess directly adjacent to the respective end of the ring segment is formed at their two circumferential ends, a first recess being formed on a first flat side of the ring segment oriented perpendicular to the central axis of the clamping ring, and the another recess is formed on a second flat side facing away from the first flat side and oriented parallel to the first flat side. Accordingly, when the ring segments are mounted on the wall part, one recess is directed in the direction of the head part, while the other recess faces the foot part. In the area of the recesses, the interconnected ring segments of the Clamping ring arranged to overlap each other in the axial and circumferential direction of the clamping ring.
  • the individual ring segments of the clamping ring are preferably not only connected to one another but also to the foot part.
  • the ring segments of the clamping ring are screwed together with the foot part to produce a connection.
  • through holes are formed on the two recesses of the ring segments in the axial direction of the clamping ring, which are arranged such that in the assembled state of the clamping ring and the then overlapping recesses of the ring segments, the through holes formed on the overlapping recesses are aligned with one another.
  • a head screw is guided through the common through hole thus formed, which is screwed into a threaded blind hole formed on the foot part.
  • the in the 1 - 11 The multistage centrifugal pump shown has a foot part 2.
  • This foot part 2 is equipped with two connecting flanges 4 and 6.
  • the connection flange 4 forms a suction connection and the connection flange 6 a pressure connection of the centrifugal pump.
  • the connecting flange 4 forming the suction nozzle surrounds a suction channel 8, which opens within a suction space formed in the foot part 2, to which the suction mouth of an impeller 10 of a first pump stage of the centrifugal pump connects, which is formed by the impeller 10 and a housing 12 surrounding it.
  • the centrifugal pump has five pump stages consisting of an impeller 10 and a housing 12. These pump stages are arranged vertically one above the other, the impellers 10 of these pump stages being seated on a common pump shaft which is led out of a pump housing of the centrifugal pump on the upper side thereof at a head part 14 spaced in the vertical direction from the foot part 2. This pump shaft is not relevant to the invention and is therefore omitted from the drawing for reasons of better clarity.
  • the pump housing of the centrifugal pump is also formed by a wall part 16 which connects the foot part 2 to the head part 14 and surrounds the pump stages of the centrifugal pumps at a radial distance.
  • a wall part 16 is used in the present embodiment, a stainless steel tube.
  • the wall part 16 has a section 18 which extends in the axial direction of the centrifugal pump beyond the head part 14.
  • the head part 14 is integrated into the wall part 16 at a distance from the end of the wall part 16 facing away from the foot part 2, the head part 14 being connected to the wall part 16 in a pressure-tight manner by means of a weld.
  • the welding is carried out on the inside of the wall part 16 by means of laser welding.
  • annular flange 24 is arranged at the end of the section 18 of the wall part 16 facing away from the foot part 2.
  • the ring flange 24 forms a motor chair for an electric motor 20, a motor shaft of the electric motor 20 being connected via a coupling 22 to the pump shaft (not shown) in the region of the section 18 of the wall part 16.
  • the annular flange 24 is of shoulder-shaped design and has a section 26 engaging in the interior of the wall part 16 and a section 28 resting on the end of the wall part 16.
  • the outer cross section of section 26 of ring flange 24 corresponds to the inner cross section of wall part 16
  • the outer cross section of section 28 of ring flange 24 corresponds to the outer cross section of wall part 16.
  • connection of the electric motor 20 to the ring flange 24 takes place via a screw connection.
  • a screw connection for this purpose, on the ring flange 24, such as in particular Fig. 4 can be seen, at the same radial distance from the center of the ring flange 24 four through holes 30 extending in the axial direction of the ring flange 24 are formed, which serve to receive the screws, by means of which a counter flange of the electric motor 20 is attached to the ring flange 24.
  • four further axially directed through holes 32 are formed on the ring flange 24, which are arranged at the same radial distance from the center of the ring flange 24, the radial distance of the through holes 32 from the center of the ring flange 24 being less than the radial distance of the through holes 30 from the center of the ring flange 24.
  • the through holes 32 are used to fasten an electric motor, the counter flange of which differs from the counter flange of the electric motor 20.
  • Two windows 34 are formed diametrically opposite one another on section 18 of wall part 16.
  • the interior of section 18 of wall part 16 is accessible from outside wall part 16 via window 34.
  • a tongue 40 which is directed into the interior of the wall part 16 and serves for releasably fastening the annular flange 24 to the wall part 16, engages.
  • a through hole 42 is formed in each case, which is used to receive a screw which is screwed into a threaded blind hole which is formed on the section 26 of the ring flange 24 and corresponds in position to the through hole 42 , whereby the annular flange 24 is fixed to the wall part 16.
  • the wall part 16 is widened radially at its end facing away from the head part 14, in that the wall part 16 merges there into a radially widened section 44 via a shoulder.
  • a section 46 of the base part 2 engages in this enlarged section 44 of the wall part 16, which section forms part of the flow connection between the connecting flanges 4 and 6 and the pump housing (see Fig. 2 and 10th ).
  • an annular groove 48 is formed, which for receiving a sealing ring 50 (sealing wall part 16 from foot part 2) ( Fig. 2 ) serves.
  • the pressure-tight connection of the wall part 16 to the foot part 2 takes place via a clamping ring 52.
  • This clamping ring 52 is circumferentially divided and has six identical ring segments 54, the structure of which is shown in FIG 8 and 9 becomes clear.
  • the 8 and 9 it can be seen that at the two circumferential ends of the ring segments 54 there is in each case a recess 56 or 58 immediately adjacent to the relevant end.
  • the recess 56 is formed on a flat side 60 and the recess 58 on a flat side of the ring segment 54 facing away from the flat side 60.
  • the ring segments 54 Adjacent to the flat side 60, the ring segments 54 also each have a shoulder 64, which in the assembled state of the ring segments 54 points in the direction of the center of the clamping ring 52. In the assembled state, the ring segments 54 overlap one another in the region of the recesses 56 and 58 formed on the ring segments 54, a section of a first ring segment 54 which is reduced in the region of the recess 56 in the axial direction of the clamping ring 52 and one in the region of the recess 58 likewise in the axial direction of the clamping ring 52 reduced portion of a second ring segment 54 contacted.
  • the ring segments 54 are connected to one another by means of a screw connection.
  • through-holes 68 are formed on the ring segments 54 in the region of the recesses 56 and 58, which are aligned with one another when adjacent ring segments 54 overlap one another in the region of the recesses 56 and 58.
  • the screws 66 are used not only to connect the ring segments 54 to one another but also to brace the clamping ring 52 on the outside of the wall part 16 Fig. 10 becomes clear.
  • the individual ring segments 54 of the clamping ring 52 are arranged on the outside of the wall part 16 in such a way that their shoulder 64 engages around a shoulder 70 forming a transition on the wall part 16 to its enlarged section 44 and come to bear on six projections 72 projecting radially on the base part 2, the through holes 68 formed on the overlapping sections of the ring segments 54 being aligned with threaded blind holes 74 formed on the projections 72.
  • the screws 66 guided through the through holes 68 of the ring segments 54 are screwed into the threaded blind holes 74.
  • the in the 12 and 13 Centrifugal pump shown differs from that in the 1 - 11 Centrifugal pump shown only with regard to the design of the wall part connecting the foot part 2 to the head part 14 and the design of the motor chair and its connection to the wall part.
  • the in the 12 and 13 Centrifugal pump shown extends a wall part 16 'to a lesser extent than the wall part 16 of the in the Figures 1-12 shown centrifugal pump over the head part, so that a section 18 'of the wall part 16' shorter than the section 18 of the wall part 16 of the in the Figures 1-12 centrifugal pump shown.
  • the ring flange 24 ' On that in the 12 and 13 Arranged at the upper end of the wall part 16 'is an annular flange 24' which engages with a section 26 'in the interior of the wall part 16' and rests with a section 28 'on the wall part 16'.
  • the ring flange 24 ' has a structure 76 on its flat side facing away from the head part 14.
  • the structure 76 is formed by two webs 78 which are arranged opposite one another on the ring flange 24 and run obliquely on a central axis X of the centrifugal pump. Of the two webs 78 is in the 12 and 13 only one web 78 can be seen in each case.
  • a fastening flange 80 is arranged thereon.
  • the fastening flange 80 is used to fasten an electric motor 20 which is screwed to the fastening flange 80 with a counter flange.
  • the annular flange 24 ', the structure 76 and the fastening flange 80 thus form a motor chair for the electric motor 20, on this motor chair the coupling of the pump shaft arranged between the fastening flange 80 and the annular flange 24' with the drive shaft of the motor 20, which in the 12 and 13 is not shown, and the components, also not shown, on the head part 14 are easily accessible via the spaces between the webs 78 forming the structure 76.
  • FIG. 13 The attachment of the motor chair in the 12 and 13 centrifugal pump is shown in particular Fig. 13 clear.
  • two rectangular openings 82 are formed on the wall part 16 'diametrically opposite one another and just below the area in which the section 26' of the ring element 24 'engages in the interior of the wall part 16'.
  • the openings 82 each serve to receive a fastening element 84.
  • the fastening elements 84 each have a base body 86 with a rectangular cross-sectional contour corresponding to the openings 82, which engages from the outside of the wall part 16 'through the opening 82 into the interior of the wall part 16', and an end section 88 which extends over the cross-sectional contour of the base body 86 protrudes and comes to rest on the outside of the wall part 16 '.
  • a threaded hole 90 extends through the base body 86 of the fastening elements 84 and is aligned in the installed position of the fastening element 84 on the wall part 16 ′ parallel to the central axis X of the centrifugal pump.
  • two through holes 92 are formed on the ring flange 24'. These through holes 92 each serve to receive a cap screw 94 which is screwed into the threaded hole 90 of the fastening element 84, whereby the motor chair is fixed to the wall part 16 '.
  • Centrifugal pump shown corresponds essentially to that in the 12 and 13 centrifugal pump shown and differs from this only in terms of the attachment of the motor chair to the wall part 16 '.
  • This attachment is carried out by a welded connection of the ring flange 24 'to the wall part 16 in the area in which the section 26' engages in the interior of the wall part 6 '.
  • the centrifugal pump shown is based essentially on that in the 1 - 11 centrifugal pump shown and differs from the latter centrifugal pump only in terms of the design of the motor chair.
  • This motor chair has an annular flange 24 ", which extends from the annular flange 24 in the 1 - 11
  • the centrifugal pump shown only differs with regard to the axial dimensions of section 28 ′′.
  • a fastening flange 80 ' is arranged on the flat side of section 28 ".
  • the fastening flange 80' is designed for fastening electric motors 20 with a larger counter flange 96 and for this purpose extends radially beyond the outer circumference of the wall part 16 Area extending beyond the wall part 16, the mounting flange 80 'is supported on a plurality of stiffening ribs 98 which project radially on the outer circumference of the section 28 "of the ring flange 24".

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15164219.6A 2015-04-20 2015-04-20 Mehrstufige kreiselpumpe Active EP3085961B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15164219.6A EP3085961B1 (de) 2015-04-20 2015-04-20 Mehrstufige kreiselpumpe
RU2016115045A RU2637342C2 (ru) 2015-04-20 2016-04-19 Многоступенчатый центробежный насос
US15/132,540 US20160305445A1 (en) 2015-04-20 2016-04-19 Multi-stage centrifugal pump
CN201610247904.3A CN106065861A (zh) 2015-04-20 2016-04-20 多级离心泵

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15164219.6A EP3085961B1 (de) 2015-04-20 2015-04-20 Mehrstufige kreiselpumpe

Publications (2)

Publication Number Publication Date
EP3085961A1 EP3085961A1 (de) 2016-10-26
EP3085961B1 true EP3085961B1 (de) 2020-08-05

Family

ID=52997297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15164219.6A Active EP3085961B1 (de) 2015-04-20 2015-04-20 Mehrstufige kreiselpumpe

Country Status (4)

Country Link
US (1) US20160305445A1 (ru)
EP (1) EP3085961B1 (ru)
CN (1) CN106065861A (ru)
RU (1) RU2637342C2 (ru)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3434909B1 (en) 2017-07-25 2023-09-27 CIRCOR Pumps North America, LLC Pump casing with integral support flange and suction flange
BR112020015882A2 (pt) * 2018-02-05 2021-02-09 Weir Slurry Group, Inc. placa de estrutura de barra roscada para bomba centrífuga
DE102021005120A1 (de) * 2020-10-16 2022-04-21 KSB SE & Co. KGaA Laterne mit thermischer Trennwirkung

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126831A (en) * 1964-03-31 Motor-pump unit
US2831432A (en) * 1953-03-17 1958-04-22 Goulds Pumps Multi-stage centrifugal pump
US3041977A (en) * 1959-02-09 1962-07-03 Sta Rite Products Inc Submersible motor-pump unit
US3544138A (en) * 1969-04-07 1970-12-01 Ulrich C Von Eiff Coupling assembly for conduits
AU505880B2 (en) * 1975-02-28 1979-12-06 Vsesjuzny Niipkidugsv Split casing pump
US4135852A (en) * 1977-03-28 1979-01-23 Mcnally Mountain States Steel Company Centrifugal slurry pump and method
US4225160A (en) * 1978-02-27 1980-09-30 Exxon Production Research Company Low friction remotely operable clamp type pipe connector
FR2568636B1 (fr) * 1984-08-03 1989-01-06 Electro Hydraulique Seh Pompe multicellulaire a cartouche demontable
DK155231C (da) * 1986-05-12 1989-07-17 Grundfos Int Spalteroersmotorpumpe
DE3629123C3 (de) * 1986-08-27 1994-04-28 Grundfos International A S Bje Mehrstufige Inline-Kreiselpumpe
DE3729673A1 (de) * 1987-09-04 1989-03-23 Grundfos Int Mehrstufige kreiselpumpe
US5318403A (en) * 1990-12-25 1994-06-07 Ebara Corporation Interstage casing for a pump made of sheet metal and method of manufacturing the same
US5203681C1 (en) * 1991-08-21 2001-11-06 Molten Metal Equipment Innovat Submersible molten metal pump
RU2042053C1 (ru) * 1992-08-18 1995-08-20 Головное конструкторское бюро Научно-производственного объединения "Энергия" им. акад. С.П.Королева Многоступенчатый электронасосный агрегат
JPH08232884A (ja) * 1995-02-24 1996-09-10 Ebara Corp 全周流型ポンプ群及びその製造方法
US6537024B2 (en) * 1998-08-03 2003-03-25 Industrial Technology Research Institute Method for fabricating sheet metal pump casing
CN2371372Y (zh) * 1999-05-18 2000-03-29 曹伟祥 立式便拆多级离心泵
DE10239997A1 (de) * 2002-08-27 2004-03-04 Gardena Manufacturing Gmbh Pumpenanordnung
CN100404874C (zh) * 2006-01-21 2008-07-23 阳江市新力工业有限公司 一种冲压焊接食品泵
EP1855010B1 (en) * 2006-05-11 2008-08-13 Pompetravaini S.p.A. Single-stage liquid ring vacuum pump with suction and discharge manifold integrated in the central body.
WO2008071592A1 (en) * 2006-12-14 2008-06-19 Dab Pumps S.P.A. Hydraulic pump
DE102008045093B4 (de) * 2008-08-29 2015-12-10 Ksb Ag Mehrstufige Kreiselpumpe mit Mantelrohr
ATE511607T1 (de) * 2009-02-26 2011-06-15 Grundfos Management As Pumpenaggregat
US9745993B2 (en) * 2011-06-13 2017-08-29 Hayward Industries, Inc. Sealing device for an immersible pump
CN202690463U (zh) * 2012-03-30 2013-01-23 大连四方佳特流体设备有限公司 立式双筒体多级离心泵
RU2636288C2 (ru) * 2013-05-22 2017-11-21 Грундфос Холдинг А/С Многоступенчатый самовсасывающий центробежный насосный агрегат
EP2818722B1 (de) * 2013-06-24 2019-01-09 Grundfos Holding A/S Kreiselpumpe
EP2818721B1 (de) * 2013-06-24 2019-02-20 Grundfos Holding A/S Kreiselpumpe
CN203412771U (zh) * 2013-07-26 2014-01-29 上海天泉泵业集团有限公司 轻型立式多级离心泵
US9611630B2 (en) * 2014-04-17 2017-04-04 Martin G. Danhi Drain catch with cross bars repair insert

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20160305445A1 (en) 2016-10-20
RU2637342C2 (ru) 2017-12-04
EP3085961A1 (de) 2016-10-26
RU2016115045A (ru) 2017-10-24
CN106065861A (zh) 2016-11-02

Similar Documents

Publication Publication Date Title
DE2720130C3 (de) Meißeldirektantrieb für Tiefbohrwerkzeuge
EP1528225B1 (de) Strömungsmaschine und Verfahren zum Herstellen eines Leitgitters
EP2905472B1 (de) Naßlaufkreiselpumpe
EP3085961B1 (de) Mehrstufige kreiselpumpe
EP2818721B1 (de) Kreiselpumpe
EP1687201B1 (de) Strahlantrieb
EP3181908B1 (de) Mehrstufige kreiselpumpe mit aus blech gebildeten zugankern
DE102014205195A1 (de) Windenergieanlagen-Rotorblatt, Windenergieanlagen-Rotorblattanschluss und Windenergieanlage
EP2143955B1 (de) Bohrlochpumpe
EP3320210B1 (de) Hydraulikaggregat
DE60102885T2 (de) Verschleissbeständige Kraftstoffpumpe
EP3234371B1 (de) Kreiselpumpenlaufrad
EP3009680B1 (de) Mehrstufige Kreiselpumpe
EP2696039A1 (de) Gasturbinenstufe
EP3234369B1 (de) Axialventilator
DE102015104300B4 (de) Exzenterschneckenpumpe und Verfahren zum Ausbau eines Stators aus einer derartigen Exzenterschneckenpumpe
DE102008033073B3 (de) Zentrifugalpumpe
WO2016082956A1 (de) Turbinengehäuseanordnung, insbesondere mit einem aussengehäuseteil und einem abdampfgehäuseteil einer dampfturbine, sowie verwendung hierfür
DE19908143C2 (de) Geschmiedetes Kreiselpumpengehäuse
DE102014102372A1 (de) Karosserie eines Kraftfahrzeugs
DE10142442B4 (de) Gehäuse
DE102007037012B4 (de) Gebläseeinheit und handgetragenes Blasgerät
EP3016855B1 (de) Propeller-naben-pressverband
DE102017128093A1 (de) Laufrad zur Verwendung in einer Strömungsmaschine
EP3431749B1 (de) Extender zum befestigen eines rotorblatts an einem rotornabengehäuse einer windenergieanlage, verfahren zur herstellung eines extenders und verfahren zur montage eines extenders

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20170426

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20200306

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1299078

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200815

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502015013146

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200805

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201207

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201105

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201106

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502015013146

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

26N No opposition filed

Effective date: 20210507

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502015013146

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20210420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210420

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210420

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201205

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1299078

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20150420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200805