EP0664397A1 - Pompe à rouet - Google Patents

Pompe à rouet Download PDF

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Publication number
EP0664397A1
EP0664397A1 EP94100970A EP94100970A EP0664397A1 EP 0664397 A1 EP0664397 A1 EP 0664397A1 EP 94100970 A EP94100970 A EP 94100970A EP 94100970 A EP94100970 A EP 94100970A EP 0664397 A1 EP0664397 A1 EP 0664397A1
Authority
EP
European Patent Office
Prior art keywords
impeller
pump
rotor
wing
wing elements
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Withdrawn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
EP94100970A
Other languages
German (de)
English (en)
Inventor
Dieter Marquardt
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.)
Juwel Aquarium GmbH and Co KG
Original Assignee
Juwel Aquarium 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
Application filed by Juwel Aquarium GmbH and Co KG filed Critical Juwel Aquarium GmbH and Co KG
Priority to EP94100970A priority Critical patent/EP0664397A1/fr
Publication of EP0664397A1 publication Critical patent/EP0664397A1/fr
Withdrawn legal-status Critical Current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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2283—Rotors specially for centrifugal pumps with special measures for reverse pumping action
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape

Definitions

  • the invention relates to an impeller pump for conveying water in aquarium vessels, the impeller pump being driven by means of a shaded-pole motor operated with single-phase AC voltage and the rotor of the motor being connected to a pump impeller.
  • Impeller pumps of this type have long been used to convey aquarium water in aquarium vessels.
  • the electric motors that have the impeller pump as the drive element are so-called shaded-pole motors that are based on three-phase asynchronous motors. Unlike three-phase asynchronous motors, which do not start automatically during two-phase operation or one phase and the center conductor (single-phase AC voltage), since only one alternating field can be excited in the stator of the motor, shaded-pole motors can When operating with single-phase AC voltage, it always starts up automatically on its own, but the direction of rotation of the motor is indefinite.
  • the impellers previously used according to the impeller principle provide a resistance to the rotor starting, which prevents the motor from starting.
  • the impeller is connected to the rotor in a partially rotatable manner relative to the rotor, so that the rotor can initially be freely rotated - without resistance - until it hits a locking device. Since the angular momentum is already strong enough, it overcomes the starting resistance of the impeller and the pump starts, whereby the direction of rotation remains undetermined.
  • the object is achieved according to the invention in that the rotor is firmly connected to the pump impeller and the impeller wing elements have a profiled contour in the radial direction, starting from the impeller axis.
  • the advantage of the solution proposed according to the invention consists essentially in that, due to the profiled impeller blade elements, the water to be pumped can flow out between the impeller blade elements virtually without turbulence at the time when the motor driving the impeller pump starts, with the result that, compared to previous pump impellers, a greatly reduced amount Water resistance acts on the rotor of the motor via the pump impeller, so that the motor can start up even though the impeller is firmly connected to the rotor.
  • the impeller pump according to the invention is characterized by absolute smoothness, which is further supported by the fact that the water can flow out of the wing profiles quasi turbulence-free due to the profiled contour of the impeller wing elements, and also there is no need to lock the partially rotatable impeller, which acts as an imbalance when the impeller rotor is rotated and is also responsible for the noise.
  • the profile of the impeller wing elements is at least formed on one side of the impeller wing.
  • the impeller wing elements are preferably designed at their end facing the impeller axis in such a way that they enclose a wing-free space in their entirety.
  • This wing-free space effectively represents the suction side of the pump impeller or the impeller pump for the water to be pumped.
  • the space has a connection with all the gaps formed between the impeller wing elements, so that the water to be pumped can flow along almost the entire cross section of the individual impeller wing elements, which at the same time achieves a reduction in noise in the course of the water pumping while increasing the conveying capacity, since that Water can flow longitudinally on the entire available surfaces of the impeller wing elements and, in the absence of webs or the like, as in previous pump impellers, no turbulent flow forms, the pump noise is reduced again.
  • the rotor of the impeller pump is provided with an axial projection on which the pump impeller is arranged.
  • the pump impeller advantageously has a shaft-like extension with an impeller-axial hole in which the projection of the Rotor is included.
  • the rotor and the pump impeller thus advantageously form a firmly connected, quasi-uniform impeller element which can be manufactured in such a way that it rotates vibration-free without imbalance.
  • the pump impeller can consist of any suitable materials, for example metal or an elastomeric material such as rubber and the like.
  • plastic which, unlike metal, is light and thus has a lower moment of inertia than a comparable pump impeller made of metal.
  • plastic can be provided inexpensively, even if the pump impeller is damaged, it can be replaced easily and inexpensively. This applies all the more if the pump impeller is preferably designed as a one-piece injection molded part.
  • An impeller pump 10 which is shown only schematically in FIG. 1 for the pump impeller 12 shown there, has a pump housing 110 which is arranged around the impeller axis 18 or the rotor axis 15 of the rotor 11, compare the circular dash-dotted line there, in the pump impeller 12 is arranged in a manner known per se.
  • the motor which drives the impeller pump 10 and is not shown separately here is a so-called shaded-pole motor (shaded-pole motor with a main gap or also called a stripped-pole shaded-pole motor), which is operated with single-phase AC voltage.
  • the rotor 11 of the motor shown in Fig. 2 is formed by a permanent magnet and rotates in a known manner without a collector in the alternating field of the stator of the motor.
  • the rotor 11 has a bore 150 which is axial to the rotor axis 15 and via which the rotor 11 is plugged onto a fixed axis in the stator of the motor.
  • the pump impeller 12, compare FIGS. 1 and 3, has, in a manner known per se, a plurality of impeller wing elements 13 which extend radially away from the impeller axis 18.
  • the impeller wing elements 13 used here in the impeller pump 10 are provided with a profiled contour, ie they have a profile 16.
  • the profile 16 is formed in the radial direction 14, starting from the impeller axis 18, and tapers from the greatest width in the radial direction 14.
  • the impeller wing elements 13 are thus at least partially in the manner of a Wing profile, as it is known from airplanes or generally from flow technology.
  • the impeller wing elements 13 sit quasi star-shaped, starting from the impeller axis 18, on a shaft-like extension 23 of the pump impeller 12, see FIG with all the spaces 21 formed between the impeller blade elements 13. As a result, it is possible for water entering from an axis-central opening of the pump housing 10, not shown here, to flow radially outward across the individual impeller wing elements 13 through the spaces 21 without any hindrance, see arrow 140.
  • the ends 19 of the impeller wing elements facing impeller-free space 20 13 are shown here tapering to a point. It is readily possible and within the scope of the invention to optimize the flow of the entire profile 16 of the impeller wing elements 13 in such a way that no disruptive edges appear in the profile 16, i.e. to optimize the impeller wing element 13 completely in terms of flow technology (carrier surface profile).
  • impeller wing element 13 In order to direct the water access from the central opening of the pump housing 110 (not shown here) to the impeller wing element 13 or to the central impeller-free space 20, it may be sensible to provide the impeller wing elements 13 with bevels to their respective ends 19, as shown in FIG 1 and 3 is indicated schematically for some impeller wing elements 13.
  • the pump impeller 12 see FIG. 3, has an impeller-axial hole 24 in the shaft-like extension 23.
  • the projection 22 of the rotor 11 is received via the hole 24 when the rotor 11 and the pump impeller 12, compare FIGS. 2 and 3, are moved towards one another in accordance with the arrow 25.
  • the hole 24 and the projection 22 can together form an interference fit, so that no additional materials or other measures are required to connect the rotor 11 to the pump impeller 12.
  • a press fit also allows the connection to be released without additional aids and tools when exchanging either the rotor 11 or the pump impeller 12.
  • the unit comprising the rotor 11 and the pump impeller 12 arranged thereon is then pushed onto the fixed axis of the motor (not shown here) in the stator of the motor and can rotate there as intended.
  • the water flowing from the impeller axis 18 or the rotor axis 15 (not shown here) via the axial opening in the pump housing 10 is conveyed between the impeller wing elements 13 after the motor has started up due to the rotation of the motor along the arrow 140 and reaches an outlet opening 111 of the pump housing 110. Due to the profiled design of the impeller vane elements 13, the rotor 11 can be firmly connected to the pump impeller 12, as described, without fear of the motor not starting up.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP94100970A 1994-01-24 1994-01-24 Pompe à rouet Withdrawn EP0664397A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94100970A EP0664397A1 (fr) 1994-01-24 1994-01-24 Pompe à rouet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94100970A EP0664397A1 (fr) 1994-01-24 1994-01-24 Pompe à rouet

Publications (1)

Publication Number Publication Date
EP0664397A1 true EP0664397A1 (fr) 1995-07-26

Family

ID=8215627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100970A Withdrawn EP0664397A1 (fr) 1994-01-24 1994-01-24 Pompe à rouet

Country Status (1)

Country Link
EP (1) EP0664397A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023856A1 (de) * 2006-05-19 2007-11-22 Aweco Appliance Systems Gmbh & Co. Kg Pumpvorrichtung mit einem Elektromotor zum Antreiben eines Pumpenrades

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570862A (en) * 1949-10-29 1951-10-09 Gen Electric Fluid pump with direction responsive impeller blades
GB955438A (en) * 1961-02-20 1964-04-15 Sundstrand Int Corp Sa Centrifugal pump
DE2407109B1 (de) * 1974-02-14 1974-07-25 Philips Patentverwaltung Pumpvorrichtung fuer Fluessigkeiten
GB1531627A (en) * 1976-11-02 1978-11-08 Standard Telephones Cables Ltd Flat shaded pole alternating current motor
EP0061159A2 (fr) * 1981-03-20 1982-09-29 Houdaille Industries, Inc. Pompe centrifuge reversible ayant les mêmes performances dans les deux sens
FR2555258A1 (fr) * 1983-11-17 1985-05-24 Bosch Siemens Hausgeraete Groupe moto-pompe de vidange
EP0247301A2 (fr) * 1986-05-28 1987-12-02 ebm Elektrobau Mulfingen GmbH & Co. Moteur à pôles fendus asymétrique
EP0501109A1 (fr) * 1991-02-27 1992-09-02 Zanussi Elettrodomestici S.p.A. Pompe centrifuge entrainée par un moteur synchrone

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570862A (en) * 1949-10-29 1951-10-09 Gen Electric Fluid pump with direction responsive impeller blades
GB955438A (en) * 1961-02-20 1964-04-15 Sundstrand Int Corp Sa Centrifugal pump
DE2407109B1 (de) * 1974-02-14 1974-07-25 Philips Patentverwaltung Pumpvorrichtung fuer Fluessigkeiten
GB1531627A (en) * 1976-11-02 1978-11-08 Standard Telephones Cables Ltd Flat shaded pole alternating current motor
EP0061159A2 (fr) * 1981-03-20 1982-09-29 Houdaille Industries, Inc. Pompe centrifuge reversible ayant les mêmes performances dans les deux sens
FR2555258A1 (fr) * 1983-11-17 1985-05-24 Bosch Siemens Hausgeraete Groupe moto-pompe de vidange
EP0247301A2 (fr) * 1986-05-28 1987-12-02 ebm Elektrobau Mulfingen GmbH & Co. Moteur à pôles fendus asymétrique
EP0501109A1 (fr) * 1991-02-27 1992-09-02 Zanussi Elettrodomestici S.p.A. Pompe centrifuge entrainée par un moteur synchrone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023856A1 (de) * 2006-05-19 2007-11-22 Aweco Appliance Systems Gmbh & Co. Kg Pumpvorrichtung mit einem Elektromotor zum Antreiben eines Pumpenrades

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