EP0347542A2 - Pump unit for liquid-pumps - Google Patents

Pump unit for liquid-pumps Download PDF

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Publication number
EP0347542A2
EP0347542A2 EP89106849A EP89106849A EP0347542A2 EP 0347542 A2 EP0347542 A2 EP 0347542A2 EP 89106849 A EP89106849 A EP 89106849A EP 89106849 A EP89106849 A EP 89106849A EP 0347542 A2 EP0347542 A2 EP 0347542A2
Authority
EP
European Patent Office
Prior art keywords
pump unit
ring
hub
impeller
counter ring
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Withdrawn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
EP89106849A
Other languages
German (de)
French (fr)
Other versions
EP0347542A3 (en
Inventor
Klaus Dipl.-Ing. Pesch
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.)
Goetze GmbH
Original Assignee
Goetze GmbH
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 Goetze GmbH filed Critical Goetze GmbH
Publication of EP0347542A2 publication Critical patent/EP0347542A2/en
Publication of EP0347542A3 publication Critical patent/EP0347542A3/en
Withdrawn legal-status Critical Current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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2227—Construction and assembly for special materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a pump unit for liquid pumps, consisting of a plastic impeller that can be connected to a shaft via a metallic hub, a counter ring of a mechanical seal that interacts with the impeller, and a connecting body that axially holds all parts together.
  • Liquid pumps with plastic impellers combined with a mechanical seal are e.g. used in motor vehicles.
  • the problem with such pumps is that there is a risk of plastic melting at high temperatures and consequently a failure of the system.
  • the heat generated by the friction of the sliding partners of the mechanical seal is added.
  • US-PS 3,594,102 discloses a pump unit of the type mentioned.
  • the plastic impeller has a metallic hub for attaching the impeller to a shaft.
  • the counter ring of a mechanical seal is pressed into a recess in the plastic impeller.
  • the invention has for its object to improve a generic pump unit so that in particular the problem of heat build-up is prevented.
  • the end region of the radial leg of the hub is angled in the direction of the mechanical seal. In this way, the end region overlaps the mating ring and furthermore improves the stability of the impeller.
  • a static seal in the form of a pressed-in elastomer ring is provided radially between the bend and the counter ring.
  • the counter ring is held on the outer circumference. This measure has a particularly positive effect on ceramic materials, since the ring is only subjected to compressive stresses in this way.
  • a pump unit 1 for liquid pumps is shown.
  • the unit consists essentially of a plastic impeller 2 with a metallic hub 3 and a mechanical seal, the counter ring 4 is connected to the plastic impeller 2 and the sliding ring 5 corresponds to the counter ring 4 by means of a spring 6 and is not accommodated within a housing 11 shown pump housing 9 can be locked.
  • the hub 3 has a radial leg 10 which extends into a recess 7 provided for receiving the counter ring 4 and there forms the bottom in heat-conducting contact with the back surface of the counter ring 4.
  • the end region of the radial leg 10 is angled in the direction of the slide ring 5 and engages over the counter ring 4 and its static seal 12 in a housing-like manner.
  • the Direct connection of the hub 3 with the shaft 8 generates an optimal heat conduction, which prevents the plastic impeller 2 from melting.

Abstract

In a pump unit for liquid pumps, comprising a plastic impeller with a metallic hub and a mechanical seal, the counter-ring 4 is arranged in a recess 7 of the plastic impeller 2 in such a way that it is in thermally conducting contact by its rear face with the radial limb 10 of the hub 3. Heat dissipation to the shaft 8, which prevents melting of the plastic impeller 2, is thereby guaranteed. <IMAGE>

Description

Die Erfindung betrifft eine Pumpeneinheit für Flüssigkeitspumpen, bestehend aus einem über eine metallische Nabe mit einer Welle verbindbaren Kunststofflaufrad, einem mit dem Laufrad zusammenwirkenden Gegenring einer Gleitringdichtung sowie einem alle Teile axial zusammenhaltenden Verbindungskörper.The invention relates to a pump unit for liquid pumps, consisting of a plastic impeller that can be connected to a shaft via a metallic hub, a counter ring of a mechanical seal that interacts with the impeller, and a connecting body that axially holds all parts together.

Flüssigkeitspumpen mit Kunststofflaufrädern, kombiniert mit einer Gleitringdichtung, werden z.B. in Kraftfahrzeugen eingesetzt. Bei derartigen Pumpen besteht das Problem, daß bei hohen Temperaturen die Gefahr des Kunststoffschmelzens und demzufolge ein Ausfall des Systems gegeben ist. Zu der eigentlichen Mediumstemperatur summiert sich insbesondere noch die durch Reibung erzeugte Wärme der Gleitpartner der Gleitringdichtung.Liquid pumps with plastic impellers combined with a mechanical seal are e.g. used in motor vehicles. The problem with such pumps is that there is a risk of plastic melting at high temperatures and consequently a failure of the system. In addition to the actual medium temperature, the heat generated by the friction of the sliding partners of the mechanical seal is added.

Die US-PS 3.594.102 offenbart eine Pumpeneinheit der genannten Gattung. Das Kunststofflaufrad weist eine metallische Nabe zur Befestigung des Laufrades auf einer Welle auf. Der Gegenring einer Gleitringdichtung ist in einer Ausnehmung des Kunststofflaufrades eingepreßt.US-PS 3,594,102 discloses a pump unit of the type mentioned. The plastic impeller has a metallic hub for attaching the impeller to a shaft. The counter ring of a mechanical seal is pressed into a recess in the plastic impeller.

Im Betrieb muß die zwischen dem Gleitpartner auftretende Reibungswärme abgebaut werden. Während der ortsfeste Gleitring von der abzudichtenden Flüssigkeit umspült wird, wodurch eine Temperaturableitung eintritt, kann der rotierende Gegenring die Wärme nur an das Medium im engen Spalt der Gleitringpartner und an die Rückseite des Kunststoffflügelrades abgeben. Damit ist ein partielles Schmelzen des Laufrades vorprogrammiert.During operation, the frictional heat that occurs between the sliding partners must be reduced. While the stationary seal ring is being washed around by the liquid to be sealed, which leads to a dissipation of temperature, the rotating counter ring can only release the heat to the medium in the narrow gap of the seal ring partners and to the rear of the plastic impeller. This means that partial melting of the impeller is preprogrammed.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Pumpeneinheit dahingehend zu verbessern, daß insbesondere das Problem des Wärmestaus verhindert wird.The invention has for its object to improve a generic pump unit so that in particular the problem of heat build-up is prevented.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Gegenring in eine Ausnehmung des Laufrades eingepreßt ist, dessen Boden durch einen Radialschenkel der metallischen Nabe gebildet ist. Durch diese konstruktive Maßnahme steht der Gegenring in wärmeleitender Anlage zur Nabe. Die Reibungswärme kann somit vom Gegenring über den Radialschenkel der Nabe auf die rotierende Welle abgeleitet werden.This object is achieved in that the counter ring is pressed into a recess of the impeller, the bottom of which is formed by a radial leg of the metallic hub. As a result of this design measure, the counter ring is in heat-conducting contact with the hub. The frictional heat can thus be dissipated from the counter ring via the radial leg of the hub to the rotating shaft.

Einem weiteren Gedanken der Erfindung gemäß ist der Endbereich des Radialschenkels der Nabe in Richtung der Gleitringdichtung abgewinkelt. Auf diese Weise übergreift der Endbereich den Gegenring gehäuseartig und verbessert darüber hinaus die Stabilität des Flügelrades.According to a further concept of the invention, the end region of the radial leg of the hub is angled in the direction of the mechanical seal. In this way, the end region overlaps the mating ring and furthermore improves the stability of the impeller.

Radial zwischen der Abwinklung und dem Gegenring ist eine statische Abdichtung in Form eines eingepreßten Elastomerringes vorgesehen. Hierdurch wird der Gegenring am Außenumfang gehalten. Insbesondere bei keramischen Werkstoffen wirkt sich diese Maßnahme positiv aus, da der Ring auf diese Weise nur Druckspannungen unterworfen ist.A static seal in the form of a pressed-in elastomer ring is provided radially between the bend and the counter ring. As a result, the counter ring is held on the outer circumference. This measure has a particularly positive effect on ceramic materials, since the ring is only subjected to compressive stresses in this way.

Die Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.The invention is illustrated in the drawing and is explained in more detail below.

In der Zeichnung ist eine Pumpeneinheit 1 für Flüssigkeitspumpen dargestellt. Die Einheit besteht im wesentlichen aus einem Kunststofflaufrad 2 mit einer metallischen Nabe 3 und einer Gleitringdichtung, deren Gegenring 4 mit dem Kunststofflaufrad 2 verbunden ist und deren Gleitring 5 mittels einer Feder 6 mit dem Gegenring 4 korrespondiert und von einem Gehäuse 11 aufgenommen innerhalb eines nicht weiter dargestellten Pumpengehäuses 9 arretierbar ist. Erfindungsgemäß weist die Nabe 3 einen Radialschenkel 10 auf, der sich in eine zur Aufnahme des Gegenringes 4 vorgesehene Ausnehmung 7 erstreckt und dort den Boden bildend in wärmeleitender Anlage an der Rückenfläche des Gegenringes 4 anliegt. Der Endbereich des Radialschenkels 10 ist in Richtung des Gleitringes 5 abgewinkelt und übergreift den Gegenring 4 sowie dessen statische Dichtung 12 gehäuseartig. Die unmittelbare Verbindung der Nabe 3 mit der Welle 8 erzeugt eine optimale Wärmeleitung, die ein Schmelzen des Kunststofflaufrades 2 verhindert.In the drawing, a pump unit 1 for liquid pumps is shown. The unit consists essentially of a plastic impeller 2 with a metallic hub 3 and a mechanical seal, the counter ring 4 is connected to the plastic impeller 2 and the sliding ring 5 corresponds to the counter ring 4 by means of a spring 6 and is not accommodated within a housing 11 shown pump housing 9 can be locked. According to the invention, the hub 3 has a radial leg 10 which extends into a recess 7 provided for receiving the counter ring 4 and there forms the bottom in heat-conducting contact with the back surface of the counter ring 4. The end region of the radial leg 10 is angled in the direction of the slide ring 5 and engages over the counter ring 4 and its static seal 12 in a housing-like manner. The Direct connection of the hub 3 with the shaft 8 generates an optimal heat conduction, which prevents the plastic impeller 2 from melting.

Claims (3)

1. Pumpeneinheit für Flüssigkeitspumpen, bestehend aus einem über eine metallische Nabe mit einer Welle verbindbaren Kunststofflaufrad, einem mit dem Laufrad zusammenwirkenden Gegenring einer Gleitringdichtung sowie einem alle Teile axial zusammenhaltenden Verbindungskörper, dadurch gekennzeichnet, daß der Gegenring (4) in eine Ausnehmung (7) des Kunststofflaufrades (2) eingepreßt ist, deren Boden durch einen Radialschenkel (10) der metallischen Nabe (3) gebildet ist, wobei der Gegenring (4) unmittelbar mit seiner Rückenfläche am Radialschenkel (10) der Nabe (3) anliegt.1. Pump unit for liquid pumps, consisting of a plastic impeller that can be connected to a shaft via a metallic hub, a counter ring of a mechanical seal that interacts with the impeller, and a connecting body that axially holds all parts together, characterized in that the counter ring (4) fits into a recess (7). of the plastic impeller (2) is pressed in, the bottom of which is formed by a radial leg (10) of the metallic hub (3), the counter ring (4) directly abutting the radial leg (10) of the hub (3) with its back surface. 2. Pumpeneinheit für Flüssigkeitspumpen nach Anspruch 1, dadurch gekennzeichnet, daß der Endbereich des Radialschenkels (10) in Richtung der Gleitringdichtung abgewinkelt ist.2. Pump unit for liquid pumps according to claim 1, characterized in that the end region of the radial leg (10) is angled in the direction of the mechanical seal. 3. Pumpeneinheit für Flüssigkeitspumpen nach Anspruch 1 und 2, dadurch gekennzeichnet, daß radial zwischen der Abwinklung und dem Gegenring (4) die statische Abdichtung (12) in Form eines eingepreßten Elastomerringes vorgesehen ist.3. Pump unit for liquid pumps according to claim 1 and 2, characterized in that the static seal (12) is provided radially between the bend and the counter ring (4) in the form of a pressed-in elastomer ring.
EP89106849A 1988-06-24 1989-04-17 Pump unit for liquid-pumps Withdrawn EP0347542A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3821352 1988-06-24
DE3821352A DE3821352C1 (en) 1988-06-24 1988-06-24

Publications (2)

Publication Number Publication Date
EP0347542A2 true EP0347542A2 (en) 1989-12-27
EP0347542A3 EP0347542A3 (en) 1990-08-29

Family

ID=6357174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106849A Withdrawn EP0347542A3 (en) 1988-06-24 1989-04-17 Pump unit for liquid-pumps

Country Status (3)

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US (1) US4973224A (en)
EP (1) EP0347542A3 (en)
DE (1) DE3821352C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859390A1 (en) * 1998-12-22 2000-06-29 Wilo Gmbh Circulation pump driven by electric motor esp. submersible motor driven pump with pump chamber having whirling chamber and impeller held on motor shaft and unit for venting impeller chamber is provided

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3927589C2 (en) * 1989-08-22 1994-09-29 Kaco Gmbh Co Sealing unit
DE4121733A1 (en) * 1990-07-07 1992-01-16 Freudenberg Carl Fa IC engine cooling water pump
ES2047347T3 (en) 1990-07-07 1994-02-16 Freudenberg Carl Fa REFRIGERATION WATER PUMP.
DE4100426C1 (en) * 1991-01-09 1992-07-30 Fa. Carl Freudenberg, 6940 Weinheim, De
US5375852A (en) * 1991-04-08 1994-12-27 Chicago-Allis Manufacturing Corporation Rotating seal body for face type seal
DE19914930A1 (en) * 1999-04-01 2000-10-19 Freudenberg Carl Fa Mechanical seal
DE10006983A1 (en) * 2000-02-16 2001-08-23 Miele & Cie Pump impeller for a centrifugal pump, in particular for a circulation pump that can be used in dishwashers or washing machines
CN1139729C (en) * 2000-05-12 2004-02-25 清华大学 Shielded pipeline pump
US6887037B1 (en) 2003-02-03 2005-05-03 Norris E. Bates Boat impeller seal assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354529A (en) * 1963-07-29 1967-11-28 Ford Motor Co Impeller making
DE3706770A1 (en) * 1987-03-03 1988-09-15 Licentia Gmbh Centrifugal pump, in particular for dish-washing machines

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474733A (en) * 1967-10-04 1969-10-28 Us Army Water pump and method of assembly
US3594102A (en) * 1969-08-11 1971-07-20 Domain Ind Inc Water pump impeller having electrical insulation and corrosion-preventative features
JPS58121363A (en) * 1982-01-09 1983-07-19 Arai Pump Mfg Co Ltd Shaft sealing device
DE3248074C2 (en) * 1982-12-24 1985-10-17 Goetze Ag, 5093 Burscheid Sealing unit for, in particular, liquid pumps
FI864339A0 (en) * 1986-10-27 1986-10-27 Safematic Ltd Oy GLIDRINGSTAETNING.
US4779876A (en) * 1987-05-11 1988-10-25 John Crane-Houdaille. Inc. Drive for banded washer type seal
DE3740694A1 (en) * 1987-12-01 1989-06-22 Goetze Ag MECHANICAL SEAL

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354529A (en) * 1963-07-29 1967-11-28 Ford Motor Co Impeller making
DE3706770A1 (en) * 1987-03-03 1988-09-15 Licentia Gmbh Centrifugal pump, in particular for dish-washing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859390A1 (en) * 1998-12-22 2000-06-29 Wilo Gmbh Circulation pump driven by electric motor esp. submersible motor driven pump with pump chamber having whirling chamber and impeller held on motor shaft and unit for venting impeller chamber is provided

Also Published As

Publication number Publication date
US4973224A (en) 1990-11-27
DE3821352C1 (en) 1989-11-02
EP0347542A3 (en) 1990-08-29

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