EP0075100A1 - Pompe centrifuge à plusieurs étages - Google Patents

Pompe centrifuge à plusieurs étages Download PDF

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Publication number
EP0075100A1
EP0075100A1 EP82107260A EP82107260A EP0075100A1 EP 0075100 A1 EP0075100 A1 EP 0075100A1 EP 82107260 A EP82107260 A EP 82107260A EP 82107260 A EP82107260 A EP 82107260A EP 0075100 A1 EP0075100 A1 EP 0075100A1
Authority
EP
European Patent Office
Prior art keywords
pot
centrifugal pump
inlet
pump
stage
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.)
Granted
Application number
EP82107260A
Other languages
German (de)
English (en)
Other versions
EP0075100B2 (fr
EP0075100B1 (fr
Inventor
Wilfried Dr.Ing. Lehmann
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.)
Sihi GmbH and Co KG
Original Assignee
Sihi GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6141422&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0075100(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sihi GmbH and Co KG filed Critical Sihi GmbH and Co KG
Priority to AT82107260T priority Critical patent/ATE12814T1/de
Publication of EP0075100A1 publication Critical patent/EP0075100A1/fr
Application granted granted Critical
Publication of EP0075100B1 publication Critical patent/EP0075100B1/fr
Publication of EP0075100B2 publication Critical patent/EP0075100B2/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the invention relates to a multi-stage centrifugal pump, in particular for conveying liquids near their boiling point, which is immersed on the suction side in a pot for the supply of the liquid.
  • the difficulties of the pumps which have to deliver liquids close to their boiling points, always consist of having a sufficient inlet height to the inlet side of the pump and a conveying medium that is as calm as possible, or creating a pump with a correspondingly low NPSH value, so that there is no cavitation on the pump inlet side and, as a result, the known cavitation damage in the pump, or trouble-free delivery is made possible.
  • measures such as the arrangement of a special impeller in the first stage for particularly low NPSH values and special design of the inlet are known.
  • the last option is a geodetically deep arrangement of the pump in order to maintain the desired inlet conditions. Should e.g. If the pumping takes place from a ground-level container, the pump unit is arranged in a recessed pit in order to create the necessary inlet height.
  • the invention has for its object to provide a centrifugal pump which in many cases makes the arrangement of the pump unit in a pit unnecessary.
  • the solution according to the invention consists in that an annular flange for fastening to the pot is arranged on the housing of the second or a further pump stage.
  • the ring flange is preferably arranged on the last or penultimate stage housing so that the pump protrudes as deeply as possible into the pot.
  • the ring flange itself can form the lid of the pot. It is useful to arrange the inlet connection for the pot on the lid. Either the inlet connector can be directly connected to the lid (for example welded), or an attachment option for the inlet connector is provided on the lid.
  • Series pump runs out, namely the formation of a housing part as a ring flange or pot lid.
  • the effect of the invention is based on the one hand on the fact that the pump inlet inside the pot is at a lower geodetic height and on the other hand on the liquid calming in the pot.
  • the liquid guidance or calming can be further improved if flow guide ribs are arranged in the pot, which preferably run away from the pot lid.
  • the arrangement of flow guide ribs is particularly expedient when the pump is not arranged centrally in the pot.
  • the distance between the pump inlet and the wall of the pot opposite the pump inlet should be at least equal to the diameter of the pump inlet.
  • This cover supports the pump 2 with a vertical axis, as the housing part 6 of the third stage of a total of four pumps stages is formed.
  • This embodiment has the advantage that the pump is held in the cover in the simplest manner in such a way that the pump inlet 3 dips relatively deep into the pot.
  • that of the fourth stage 4 could also be designed as a pot cover if the flange of the pressure port 5 offers sufficient space for it.
  • this is arranged above the cover 7 and thus above the floor in which the pot 1 is lowered and is therefore freely accessible for assembly and maintenance.
  • the cover 7 contains a fixed connection to the inlet pipe elbow 8, the connecting flange of which is also above the level of the pot cover 7.
  • the outlet opening 9 of the nozzle 8 is rounded in a diffuser-like manner to reduce the flow losses. In the vicinity of this outlet opening - but possibly also in other areas of the pot 1 - flow guide ribs, one of which is indicated by dash-dotted lines at 11, can be provided to calm the delivery medium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP82107260A 1981-09-11 1982-08-11 Pompe centrifuge à plusieurs étages Expired EP0075100B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107260T ATE12814T1 (de) 1981-09-11 1982-08-11 Mehrstufige kreiselpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3136116 1981-09-11
DE19813136116 DE3136116A1 (de) 1981-09-11 1981-09-11 Mehrstufige kreiselpumpe

Publications (3)

Publication Number Publication Date
EP0075100A1 true EP0075100A1 (fr) 1983-03-30
EP0075100B1 EP0075100B1 (fr) 1985-04-17
EP0075100B2 EP0075100B2 (fr) 1988-10-12

Family

ID=6141422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107260A Expired EP0075100B2 (fr) 1981-09-11 1982-08-11 Pompe centrifuge à plusieurs étages

Country Status (9)

Country Link
EP (1) EP0075100B2 (fr)
AT (1) ATE12814T1 (fr)
AU (1) AU8750182A (fr)
DE (2) DE3136116A1 (fr)
DK (1) DK405282A (fr)
ES (1) ES276130Y (fr)
NO (1) NO822996L (fr)
NZ (1) NZ201627A (fr)
ZA (1) ZA825936B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104481889A (zh) * 2014-12-22 2015-04-01 邓伟 一种即开节能立式自吸泵

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE725506C (de) * 1940-01-12 1942-09-23 Wilhelm Beck Dipl Ing Selbstansaugende Kreiselpumpe
US2514865A (en) * 1945-04-13 1950-07-11 Ingersoll Rand Co Pumping unit
GB701511A (en) * 1949-11-01 1953-12-30 Hayward Tyler & Co Ltd Improvements in and relating to pump and motor combinations
DE2025117A1 (de) * 1969-05-29 1970-12-03 Etablissements Pompes Guinard S.A., Saint-Cloud (Frankreich) Verbesserung von Zentrifugalpumpen mit automatischer Ansaugung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE725506C (de) * 1940-01-12 1942-09-23 Wilhelm Beck Dipl Ing Selbstansaugende Kreiselpumpe
US2514865A (en) * 1945-04-13 1950-07-11 Ingersoll Rand Co Pumping unit
GB701511A (en) * 1949-11-01 1953-12-30 Hayward Tyler & Co Ltd Improvements in and relating to pump and motor combinations
DE2025117A1 (de) * 1969-05-29 1970-12-03 Etablissements Pompes Guinard S.A., Saint-Cloud (Frankreich) Verbesserung von Zentrifugalpumpen mit automatischer Ansaugung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104481889A (zh) * 2014-12-22 2015-04-01 邓伟 一种即开节能立式自吸泵

Also Published As

Publication number Publication date
ATE12814T1 (de) 1985-05-15
DE3263132D1 (en) 1985-05-23
DE3136116A1 (de) 1983-03-31
NO822996L (no) 1983-03-14
ES276130Y (es) 1984-12-16
ES276130U (es) 1984-05-01
ZA825936B (en) 1983-07-27
EP0075100B2 (fr) 1988-10-12
EP0075100B1 (fr) 1985-04-17
DK405282A (da) 1983-03-12
AU8750182A (en) 1983-03-17
NZ201627A (en) 1985-04-30

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