EP2719900B1 - Pompe - Google Patents

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Publication number
EP2719900B1
EP2719900B1 EP13180672.1A EP13180672A EP2719900B1 EP 2719900 B1 EP2719900 B1 EP 2719900B1 EP 13180672 A EP13180672 A EP 13180672A EP 2719900 B1 EP2719900 B1 EP 2719900B1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure
outlet
separating element
chamber
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
EP13180672.1A
Other languages
German (de)
English (en)
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EP2719900A1 (fr
Inventor
Thomas Welschinger
Marcelo Inforsati
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer Management AG
Original Assignee
Sulzer Management AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer Management AG filed Critical Sulzer Management AG
Priority to EP13180672.1A priority Critical patent/EP2719900B1/fr
Publication of EP2719900A1 publication Critical patent/EP2719900A1/fr
Application granted granted Critical
Publication of EP2719900B1 publication Critical patent/EP2719900B1/fr
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Anticipated expiration legal-status Critical

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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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings 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

Definitions

  • the invention relates to a pump according to the preamble of claim 1.
  • the multi-stage high-pressure pump consists of an outer housing in which a number of pump modules are arranged, the pump modules comprising a stator and an impeller.
  • the individual pump modules which correspond to the individual stages of the pump, are arranged axially on a rotor shaft, wherein a plurality of pump modules connected in series can form a sub-pump with an inlet and an outlet for the pump fluid.
  • a first and second sub-pumps are arranged in the axial direction along the rotor shaft with an opposite flow direction and a first pump outlet of the first sub-pump is fluidly connected to a second pump inlet of the second sub-pump.
  • the pressure on the pump fluid is successively increased in each pump module by a first pump inlet of the first sub-pump.
  • the pressure on the pump fluid at the first pump outlet thus corresponds to the pressure at the second pump inlet second sub-pump, wherein the pressure prevailing in this area can be referred to as an average pressure.
  • the pressure on the pump fluid is again successively increased in each pump module and the pump fluid is then passed on to an outlet chamber under high pressure.
  • the outlet chamber is connected to a pressure chamber, which is delimited by the outer housing and the first and second partial pumps arranged therein, as well as a separating element, so that an area is created inside the outer housing in which the pump fluid under high pressure is located.
  • the EP 0 766 007 81 discloses a multi-stage high-pressure pump which comprises a cylindrical outer housing with an outlet chamber, a cover for one side of the outer housing and a first and second sub-pumps in a "back to back" arrangement.
  • the pump also comprises a pressure chamber which is connected to the outlet chamber which is under high pressure.
  • the in the EP 0 766 007 81 The solution described provides that an axial part of the high-pressure chamber is separated from a radial part of the pressure chamber by means of a seal.
  • the part of the pressure chamber formed in the radial direction is connected to the first pump outlet of the first part pump, so that the pressure level corresponds to half the high pressure.
  • the part of the pressure chamber which is formed in the axial direction and which is connected to the outlet chamber forms an axial part of the pressure chamber which extends along the outer housing and is therefore under high pressure.
  • JP 56 041482 A describes a pump that can withstand high pressures by reducing the pressure difference at the sealing parts.
  • the pump modules communicate one after the other and alternately from the outside in towards the outlet.
  • the CH 637 185 A5 a centrifugal pump is proposed which has two counter-rotating sub-pumps.
  • a flow connection runs in the housing of the centrifugal pump between an annular space of the outlet stage of a first sub-pump and an annular chamber of a second sub-pump.
  • the inner block has a small diameter and is simple in construction.
  • the high-pressure pressure chambers of a multi-stage high-pressure pump which are located inside the outer housing, are associated with high technical requirements.
  • the outer casing must be designed larger with increasing pressure and the wall thickness and diameter of the outer casing are becoming ever larger, which increases the costs for the pump.
  • Another important reason To reduce pressure within the outer housing is the occurrence of deformations or displacements of components, which leads to an excessive reduction in the gap between the components and thus causes wear on the components.
  • the pump comprises an outer housing with an outlet chamber with an outlet connection, a first part pump and a second, downstream part pump, the first and second part pumps being arranged in the outer housing, a separating element that can be arranged between the first and second part pumps, and a rotor shaft that can be rotated is arranged in the first and second sub-pumps.
  • the outer housing can be designed, for example, as a mainly hollow cylindrical or tubular housing, in which the outlet chamber is arranged, for example, as a cylindrical opening in the outer housing.
  • the pump can be formed, for example, from a first and second sub-pump, each sub-pump being formed from one or more pump modules and the first sub-pump comprising a first pump inlet.
  • Each pump module includes a stator and an impeller.
  • the individual pump modules, which correspond to individual pump stages, are arranged axially one behind the other on the rotor shaft.
  • the first and second sub-pumps are formed in particular from the same number of pump modules, an output of the pump module n-1 being fluidly connected to an input of the pump module n within a sub-pump.
  • the individual pump modules can be screwed together, for example, or simply together be added.
  • the separating element is arranged between the first and second sub-pumps and can, for example, be screwed to the two sub-pumps.
  • the pump is designed such that the outer housing, the first sub-pump and the separating element delimit a first pressure chamber and the outer housing, the second sub-pump and the separating element delimit a second pressure chamber and the first and second pressure chambers are designed and arranged such that the outlet chamber as a single high-pressure area of the pump is formed.
  • a high pressure is to be understood as a pressure that is only present in the outlet chamber in the operating state of the pump and that corresponds to the highest pressure in the pump.
  • the first and second pressure chambers are pressure chambers which are extended in the axial direction along the outer housing.
  • the pressure formed in the first and second pressure chambers corresponds, for example, to a pressure of the sub-pumps or one of the pump modules, but not the high pressure in the outlet chamber.
  • the high-pressure region can be formed, for example, by means of the outlet chamber or the outlet chamber and a groove in the separating element.
  • the advantage of limiting the high pressure range is that, due to the lower pressure inside the outer housing, the wall thicknesses and the size of the outer housing can be reduced, for example.
  • the first pressure chamber and the outlet chamber and the second pressure chamber and the outlet chamber are separated from one another by the separating element.
  • the separating element is designed in two parts and part of a stator of a pump module is designed as part of the separating element.
  • the separating element is arranged between the first and second partial pumps and separates the first and second pressure chambers from the high pressure area.
  • the separating element can be formed, for example, from the stator of the last pump module of one of the pump modules.
  • the stator delimits, for example, the first pressure chamber and the other part of the separating element the second pressure chamber, or vice versa.
  • a first sealing element is arranged between the first pressure chamber and the outlet chamber and a second sealing element is arranged between the second pressure chamber and the outlet chamber.
  • the first and second sealing elements are arranged between the separating element and the outer housing.
  • the first sealing element is arranged between a stator of a pump module and the outer housing and the second sealing element between the separating element and the outer housing.
  • the separating element is arranged between a first pump outlet of the first sub-pump and a second pump outlet of the second sub-pump and delimits the outlet chamber.
  • the first and second sealing elements are designed as seals, in particular as an O-ring made of an elastomer material or of metal. It is also possible for two or more sealing elements, in particular O-rings, to be arranged next to one another.
  • the first and second sealing elements are arranged between or on the separating element and / or the outer housing, since these spatially delimit the first and second pressure chambers.
  • the first sealing element is arranged between or on a stator of a pump module, in particular the last pump module of the first sub-pump, and the outer housing and the second sealing element between or on the other part of the separating element and the outlet chamber, or vice versa.
  • the first and second sealing element can be arranged, for example, in a groove of the separating element or of the outer housing.
  • both the separating element and / or the stator of a pump module and the outlet chamber have a sealing element.
  • the sealing element can also be designed as a different type of seal, for example in the form of a metal seal, flat seal or a coating, for example with an elastic material.
  • the sealing element is regarded as belonging either to the separating element or to the outlet chamber.
  • the separating element, the outlet chamber and the first or second pressure chamber may be designed and arranged such that they form a receiving space in which an O-ring is arranged.
  • the separating element, the outlet chamber and the first or second pressure chamber have corresponding edges or shoulders, which in particular form a receiving space for the O-ring that is rectangular in cross section. It is therefore not necessary to provide a groove on the separating element or terminating element, which makes the production of the separating element or terminating element particularly simple.
  • the first pressure chamber comprises an equalizing opening and the second pressure chamber an inlet opening and / or an outlet of a pump module is connected to the equalizing opening of the first pressure chamber by means of an equalizing line.
  • the compensation line can be arranged in the stator of the pump module or in the separating element.
  • the first and second pressure chambers Since a compensation opening and an inlet opening are provided in the first and second pressure chambers, so that the supply of a pump fluid at a lower pressure level than the high pressure is possible, the first and second pressure chambers have a lower pressure than the high pressure in the outlet chamber.
  • the compensating opening and inlet opening can, for example, be designed as bores or connections.
  • the first and second pressure chambers can be connected to an outlet of a pump module and the pressure in the first and second pressure chambers can thus correspond to a pressure level of an outlet of a pump module.
  • the first and second pressure chambers are flow-connected to the first pump outlet of the first sub-pump, that is to say the second pressure chamber by means of the compensation opening and a compensation line, and the first pressure chamber by means of the inlet opening and a pressure line.
  • the first pump outlet of the first sub-pump is to be understood as the last pump module of the first sub-pump, which has approximately half the high pressure, so that the first and second pressure chambers advantageously have approximately the pressure level of half the high pressure.
  • the first and / or second pressure chamber can, however, also have a different pressure level in that the compensation line is not connected to the first pump outlet of the first sub-pump, but to an outlet of any pump module.
  • the outlet chamber is designed as a single high-pressure region of the pump, it is possible to keep the pressure within the remaining outer housing at a uniform lower pressure level.
  • the arrangement of the first and second pressure chambers as well as the sealing elements and the separating element serves to limit and seal the high pressure area, which thus forms a limited and single area which is under high pressure. This reduces the deformation and displacement of different components that occur at high pressures, reduces losses due to separate pressure chambers with different pressures, and minimizes the costs of manufacturing the pump due to the smaller dimensions.
  • the second pressure chamber is designed as a second pump inlet for the second sub-pump and / or the second sub-pump comprises a second pump outlet and the second pump outlet is in fluid communication with the outlet chamber by means of an outlet line.
  • the pump has at least a first and a second, downstream partial pump, the second pump outlet being connected to the outlet chamber by means of the outlet line and having high pressure.
  • Downstream means that the first pump output of the first sub-pump is connected to the second pump input of the second sub-pump.
  • the first pump outlet is connected to the second pressure chamber by means of the pressure line and the inlet opening, the second pressure chamber being simultaneously designed as a second pump inlet for the second sub-pump. This means that the pressure at the first pump outlet is lower than at the second pump outlet.
  • the equalization line, pressure line and outlet line in the separating element or the equalization line in the stator are Pump module and the pressure line and the outlet line arranged in the separating element.
  • the separating element is arranged between the first and second sub-pumps and is designed as a boundary between the first and second sub-pumps.
  • the equalization line and pressure line which connect the first and second sub-pumps to the first and second pressure chambers, and the outlet line, which connects the second sub-pump and the outlet chamber, can be arranged, for example, in the separating element.
  • the compensation line can also be arranged, for example, in the stator of any other pump module.
  • the compensating line, pressure line and outlet line can, for example, be designed as bores, lines or pipes.
  • the first and the second partial pump are arranged such that a first flow direction in the first partial pump and a second flow direction in the second partial pump are oriented in opposite directions.
  • the pump is designed in particular as a multi-stage radial centrifugal pump.
  • at least two pump modules, each with an impeller are arranged one behind the other.
  • the first and the second partial pump are arranged within the pump such that a first flow direction in the first partial pump and a second flow direction in the second partial pump are oriented in opposite directions.
  • the flow direction mentioned relates to the flow direction in an impeller of a sub-pump.
  • the pump then has a so-called back-to-back arrangement. This arrangement has the advantage that axial forces that arise at the impellers are at least partially cancel it and storage of the pump is easier and less space is required.
  • a pump 530 has an outer housing 513 designed as a housing with a first pump inlet 531 of the pump 530 and an outlet chamber 532.
  • the pump 530 sucks in pump fluid, for example in the form of water or petroleum, via the first pump inlet 531 and outputs the pump fluid again under high pressure via the outlet chamber 532.
  • the flow of the pump fluid in the pump 530 is represented by arrows 533, a reference symbol not being assigned to each arrow.
  • the pump 530 is designed as a pump with a first sub-pump 534 and a second sub-pump 535 connected downstream thereof.
  • the first sub-pump 534 consists of two series-connected pump modules 536a and 536b and the second sub-pump 535 consists of two series-connected pump modules 537a and 537b, the pump modules corresponding to the individual pump stages.
  • the pump modules 536a, 536b, 537a, 537b are all identical in principle. They all contain an impeller 538, which is rotatably connected to a rotor shaft 539.
  • the rotor shaft 539 is driven by a drive machine, not shown, so that the impeller 538 rotates together with the rotor shaft 539.
  • the impeller 538 is radially inside Pump fluid supplied, which leaves the impeller 538 radially outwards under higher pressure in a known manner.
  • the pump 530 is therefore designed as a multi-stage radial centrifugal pump. After leaving the first pump module 536a of the first sub-pump 534, the pump fluid is supplied to the axially adjacent second pump module 536b of the first sub-pump 534. A flow direction of the pump fluid thus runs in the first sub-pump 534 in FIG Fig. 1 from right to left.
  • the first part pump 534 is separated from the second part pump 535 by a separating element 512, which is arranged axially next to the second pump module 536b of the first part pump 534.
  • the separating element 512 does not rotate with the rotor shaft 539.
  • the second pump module 537b and then the first pump module 537a of the second sub-pump 535 are connected to the separating element 512 in the axial direction, the pump modules 537a, 537b of the second sub-pump 535 being arranged in a mirror-inverted manner compared to the pump modules 536a, 536b of the first sub-pump 534 .
  • this arrangement of the two sub-pumps 534 and 535 is referred to as a back-to-back arrangement.
  • the outer housing 513, the first sub-pump 534 and the separating element 512 delimit a first pressure chamber 511 in the axial direction and the outer housing 513, the second sub-pump 535 and the separating element 512 a second pressure chamber 540.
  • the first pressure chamber comprises an equalization opening and the second pressure chamber one Inlet opening, are not marked due to the level of detail.
  • the separating element 512 has a cup-shaped basic shape and is closed off by the outer housing 513.
  • the separating element 512 is connected to the pump modules 536b, 537b, for example by means of in Fig. 1 not shown Screw connections, and is arranged in the outer housing 513 such that there is contact between an outer sealing surface of the separating element 512 and an inner sealing surface of the outer housing 513.
  • the outer sealing surface of the separating element 512 has a circumferential groove in which an O-ring (not shown) made of an elastomer material is arranged.
  • the groove and the O-ring can also be arranged in the outer housing 513.
  • a second O-ring can also be arranged parallel to one of these O-rings.
  • the separating element 512 has a recess which is open to the outlet chamber 532 and which is arranged such that the groove and the O-ring and thus part of the outer contact surface are arranged between the recess and the inner contact surface of the outer housing 513. This results in a peripheral edge area on the separating element 512, on which the groove and the O-ring are arranged. This edge region is elastic to a limited extent, at least in the axial direction.
  • the outlet chamber 532 is thus an area separated from the first and second pressure chambers 511, 540 in relation to the pressure.
  • the pump fluid is supplied to the first pump module 537a of the second sub-pump 535 via the second pressure chamber 540, which first passes axially between the outer housing 513 of the second sub-pump 535 and then leads radially inward to a second pump inlet 546 of the first pump module 537a of the second sub-pump 535.
  • the pump fluid is then passed from the first pump module 537a to an input of the second pump module 537b of the second sub-pump 535 arranged between the first pump module 537a and the separating element 512.
  • the direction of flow of the pump fluid in the second sub-pump 535 thus runs in the Fig. 1 from left to right, i.e. opposite to the direction of flow in the first sub-pump 534.
  • the separating element 512 has a pressure line 541, which is connected in terms of flow to the inlet opening of the second pressure chamber 540 and from a first pump outlet 542 of the second pump module 536b of the first sub-pump 534 to the second Pressure chamber 540 leads.
  • an equalizing line 545 m separating element 512 is arranged, which is connected in terms of flow to an equalizing opening of the first pressure chamber 511, as a result of which the pump fluid is conducted from the first pump outlet 542 of the second pump module 536b of the first sub-pump 534 to the first pressure chamber 511.
  • the first and second pressure chambers (511, 540) are therefore at the same pressure level.
  • the separating element 512 has an outlet line 543, which leads from a second pump outlet 544 of the second pump module 537b of the second sub-pump 535 to the outlet chamber 532.
  • the pressure in the first pressure chamber 511 and the second pressure chamber 540 is lower than in the outlet chamber 532, so that the first and second pressure chambers (511, 540) can also be referred to as a medium pressure space.
  • the outer housing 513 has a predominantly cylindrical inner contour in the region of the separating element 512. In the axial direction, the boundary between the high-pressure outlet chamber 532 and the first and second pressure chambers (511, 540) is made by the separating element 512.

Landscapes

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

Claims (12)

  1. Une pompe comprenant un boîtier extérieur (513) ayant une chambre de sortie (532) avec un raccord de sortie; une première pompe partielle (534) et une deuxième pompe partielle en aval (535), la première et la deuxième pompes partielle (534, 535) étant disposées dans le boîtier extérieur (513), la première pompe partielle comprenant au moins un premier module de pompe (536a,b) et la deuxième pompe partielle comprenant au moins un deuxième module de pompe (537a,b), et chaque module de pompe comprenant un stator et une roue à aubes; un élément de séparation (512) disposé entre la première et la deuxième pompe partielle (534, 535); et un arbre de rotor (539) disposé de manière rotative dans la première et la deuxième pompe partielle (534, 535); dans laquelle le boîtier extérieur (513), la première pompe partielle (534) et l'élément de séparation (512) délimitent une première chambre de pression (511); dans laquelle le boîtier extérieur (513), la deuxième pompe partielle (535) et l'élément de séparation (512) délimitent une deuxième chambre de pression (540); dans laquelle la première et la deuxième chambre de pression (511, 540) sont conçues et disposées de telle sorte que la chambre de sortie (532) est formée comme une seule région à haute pression de la pompe (530); caractérisé en ce que la première chambre de pression (511) comprend une ouverture d'équilibrage qui est en communication de fluide avec une sortie de l'un des au moins un premier module de pompe (537a,b) au moyen d'une conduite d'équilibrage (545); et dans laquelle la deuxième chambre de pression (540) comprend une ouverture d'entrée qui est en communication de fluide avec la sortie (542) du premier module de pompe (537b) au moyen d'une conduite de pression (541).
  2. Une pompe selon la revendication 1, dans laquelle la première chambre de pression (511) et la chambre de sortie (532) sont séparées l'une de l'autre par l'élément de séparation (512); et la deuxième chambre de pression (540) et la chambre de sortie (532) sont séparées l'une de l'autre par l'élément de séparation (512).
  3. Une pompe selon la revendication 1 ou 2, dans laquelle l'élément de séparation (512) est conçu en deux parties ; et une partie d'un stator d'un module de pompe est conçue en tant que partie de l'élément de séparation (512).
  4. Une pompe selon l'une des revendications précédentes, dans laquelle un premier élément d'étanchéité est disposé entre la première chambre de pression (511) et la chambre de sortie (532) ; et un deuxième élément d'étanchéité est disposé entre la deuxième chambre de pression (540) et la chambre de sortie (532).
  5. Une pompe selon la revendication 4, dans laquelle le premier et le deuxième élément d'étanchéité sont disposés entre l'élément de séparation (512) et le boîtier extérieur (513).
  6. Une pompe selon la revendication 4, dans laquelle le premier élément d'étanchéité est disposé entre un stator d'un module de pompe et le boîtier extérieur (513) et le deuxième élément d'étanchéité est disposé entre l'élément de séparation (512) et le boîtier extérieur (513).
  7. Une pompe selon l'une des revendications précédentes, dans laquelle la conduite d'équilibrage (545) est disposée dans le stator du module de pompe ou dans l'élément de séparation (512).
  8. Une pompe selon l'une des revendications précédentes, dans laquelle une première sortie de pompe (542) de la première pompe partielle (534) est en communication de fluide avec l'ouverture d'équilibrage de la première chambre de pression (511) au moyen de la conduite d'équilibrage (545) et avec l'ouverture d'entrée de la deuxième chambre de pression (540) au moyen d'une conduite de pression (541).
  9. Une pompe selon l'une des revendications précédentes, dans laquelle la deuxième chambre de pression (540) est conçue comme une deuxième entrée de pompe (546) pour la deuxième pompe partielle (535).
  10. Une pompe selon l'une des revendications précédentes, dans laquelle la deuxième pompe partielle (535) comprend une deuxième sortie de pompe (544) et la deuxième sortie de pompe (544) est en communication de fluide avec la chambre de sortie (532) au moyen d'une conduite de sortie (543).
  11. Une pompe selon la revendication 10, dans laquelle la conduite d'équilibrage (545), la conduite de pression (541) et la conduite de sortie (543) sont disposées dans l'élément de séparation (512) ; ou dans laquelle la conduite d'équilibrage (545) est disposée dans le stator du module de pompe et la conduite de pression (541) et la conduite de sortie (543) sont disposées dans l'élément de séparation (512).
  12. Une pompe selon l'une des revendications précédentes, dans laquelle la première et la deuxième pompe partielle (534, 535) sont disposées de telle sorte qu'un premier sens d'écoulement dans la première pompe partielle (534) et un deuxième sens d'écoulement dans la deuxième pompe partielle (535) sont orientées dans la direction opposée.
EP13180672.1A 2012-10-09 2013-08-16 Pompe Active EP2719900B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13180672.1A EP2719900B1 (fr) 2012-10-09 2013-08-16 Pompe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12187834 2012-10-09
EP13180672.1A EP2719900B1 (fr) 2012-10-09 2013-08-16 Pompe

Publications (2)

Publication Number Publication Date
EP2719900A1 EP2719900A1 (fr) 2014-04-16
EP2719900B1 true EP2719900B1 (fr) 2020-07-15

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ID=47010366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13180672.1A Active EP2719900B1 (fr) 2012-10-09 2013-08-16 Pompe

Country Status (2)

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EP (1) EP2719900B1 (fr)
BR (1) BR102013024798B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640666B (zh) * 2015-04-20 2018-09-04 湘潭泵业集团有限公司 一种多级离心泵

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH637185A5 (en) * 1978-12-21 1983-07-15 Sulzer Ag Centrifugal pump
JPS5641482A (en) * 1979-09-11 1981-04-18 Kubota Ltd Barrel type high pressure multistage pump
CH669979A5 (fr) * 1986-04-30 1989-04-28 Sulzer Ag
JPH0988864A (ja) 1995-09-26 1997-03-31 Ebara Corp 二重胴型高圧多段ポンプの構造
GB0117941D0 (en) * 2001-07-24 2001-09-19 Weir Pumps Ltd Pump assembly

Non-Patent Citations (1)

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

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Publication number Publication date
BR102013024798B1 (pt) 2021-11-16
BR102013024798A2 (pt) 2015-08-11
EP2719900A1 (fr) 2014-04-16

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