EP0340696A3 - Overload safety arrangement for a centrifugal pump - Google Patents

Overload safety arrangement for a centrifugal pump Download PDF

Info

Publication number
EP0340696A3
EP0340696A3 EP19890107847 EP89107847A EP0340696A3 EP 0340696 A3 EP0340696 A3 EP 0340696A3 EP 19890107847 EP19890107847 EP 19890107847 EP 89107847 A EP89107847 A EP 89107847A EP 0340696 A3 EP0340696 A3 EP 0340696A3
Authority
EP
European Patent Office
Prior art keywords
temperature
overload protection
pump
wall
outlet valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890107847
Other languages
German (de)
French (fr)
Other versions
EP0340696A2 (en
Inventor
Alfred Gnaehrich
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.)
Warman International Ltd
Original Assignee
Warman International Ltd
Kloeckner Humboldt Deutz 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 Warman International Ltd, Kloeckner Humboldt Deutz AG filed Critical Warman International Ltd
Publication of EP0340696A2 publication Critical patent/EP0340696A2/en
Publication of EP0340696A3 publication Critical patent/EP0340696A3/en
Withdrawn legal-status Critical Current

Links

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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
    • F04D15/0263—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being temperature, ingress of humidity or leakage
    • 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

Abstract

Bei bekannten Überlastsicherungen für Kreisel­ pumpen wer den zur Messung der Temperatur Tempe­ raturmeßfühler eingesetzt, die direkt in das von der Pumpe geförderte Flüssigkeitsmedium eintauchen. Bei einer Abweichung der von den Temperaturmeßfühlern gemessenen Temperatur von einem vorgegebenen Temperatur-Soll-Wert wird über eine Verstelleinrichtung ein Auslaßventil geöffnet und/oder ein akustisches oder opti­ sches Signal ausgelöst oder der Pumpenantrieb abgeschaltet. Hierbei besteht insbesondere bei der Förderung von Flüssigkeiten mit chemisch aggressiven Stoffen und/oder abrasiven Fest­ stoffen die Gefahr daß die Temperaturmeßfühler sehr rasch zerstört werden und dadurch als Meß­ organe zur Erfassung der Betriebstemperatur ausfallen. Auch sind diese Überlastsicherungen im konstruktiven Aufbau verhältnismäßig kompli­ ziert. Erfindungsgemäß wird demgegenüber eine im konstruktiven Aufbau besonders einfache und stets funktionsfähige Überlastsicherung für Kreiselpumpen dadurch erreicht daß das Auslaß­ ventil (11) und die Temperaturmeßfühler (2, 3) in der Wandung (1) des Spiralgehäuses angeord­ net sind, wobei die Temperaturmeßfühler (2, 3) im Körper der Wandung (1) des Spiralgehäuses, und zwar mit Abstand (d) von der inneren Wand­ fläche (18) angeordnet sind. Known overload protection for gyros pump who to measure the temperature Tempe raturmeßprobe used directly in the Liquid medium conveyed by the pump immerse. If there is a deviation from the Temperature sensors measured temperature of a predetermined temperature setpoint an outlet valve via an adjusting device opened and / or an acoustic or opti signal triggered or the pump drive switched off. Here there is in particular at pumping liquids with chemical aggressive substances and / or abrasive hard the danger that the temperature sensor be destroyed very quickly and thereby as a measurement organs for recording the operating temperature fail. These are also overload protection devices relatively complicated in the construction graces. In contrast, according to the invention particularly simple and Always functional overload protection for Centrifugal pumps reach the outlet valve (11) and the temperature sensor (2, 3) arranged in the wall (1) of the volute casing net, the temperature sensors (2, 3) in the body of the wall (1) of the volute, at a distance (d) from the inner wall surface (18) are arranged.

EP19890107847 1988-05-03 1989-04-29 Overload safety arrangement for a centrifugal pump Withdrawn EP0340696A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3814948 1988-05-03
DE19883814948 DE3814948A1 (en) 1988-05-03 1988-05-03 OVERLOAD PROTECTION FOR CENTRIFUGAL PUMPS

Publications (2)

Publication Number Publication Date
EP0340696A2 EP0340696A2 (en) 1989-11-08
EP0340696A3 true EP0340696A3 (en) 1990-11-14

Family

ID=6353455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890107847 Withdrawn EP0340696A3 (en) 1988-05-03 1989-04-29 Overload safety arrangement for a centrifugal pump

Country Status (2)

Country Link
EP (1) EP0340696A3 (en)
DE (1) DE3814948A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010049C1 (en) * 1990-03-29 1991-10-10 Grundfos International A/S, Bjerringbro, Dk Pump unit for heating or cooling circuit - uses frequency regulator to reduce rotation of pump motor upon detected overheating
DE4143035A1 (en) * 1991-12-24 1993-07-01 Helmut W Diedrichs Prodn. of stretch grids from thin metal strip - by lateral stretching of slotted, continuously fed strip
WO2011123892A1 (en) * 2010-04-06 2011-10-13 Keto Ip Pty Ltd As Trustee For The Keto Ip Trust Fluid pumps and monitoring systems for fluid pumps

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518597A (en) * 1945-06-20 1950-08-15 Niagara Alkali Company Pumping apparatus
US3395722A (en) * 1965-06-15 1968-08-06 Woma Appbau Wolfgang Maasberg Control valve for high-pressure pumps and the like
DE1528679A1 (en) * 1965-10-21 1969-07-17 Dresser Ind Temperature sensor for rotary pumps
DE3523147A1 (en) * 1984-07-02 1986-01-09 General Electric Co., Schenectady, N.Y. METHOD AND ARRANGEMENT FOR PROTECTING PUMP SYSTEMS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518597A (en) * 1945-06-20 1950-08-15 Niagara Alkali Company Pumping apparatus
US3395722A (en) * 1965-06-15 1968-08-06 Woma Appbau Wolfgang Maasberg Control valve for high-pressure pumps and the like
DE1528679A1 (en) * 1965-10-21 1969-07-17 Dresser Ind Temperature sensor for rotary pumps
DE3523147A1 (en) * 1984-07-02 1986-01-09 General Electric Co., Schenectady, N.Y. METHOD AND ARRANGEMENT FOR PROTECTING PUMP SYSTEMS

Also Published As

Publication number Publication date
DE3814948A1 (en) 1989-11-16
EP0340696A2 (en) 1989-11-08

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