EP0455542A1 - Geräuscharme Kreiselmotorpumpe für Flüssigkeiten - Google Patents

Geräuscharme Kreiselmotorpumpe für Flüssigkeiten Download PDF

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Publication number
EP0455542A1
EP0455542A1 EP91401098A EP91401098A EP0455542A1 EP 0455542 A1 EP0455542 A1 EP 0455542A1 EP 91401098 A EP91401098 A EP 91401098A EP 91401098 A EP91401098 A EP 91401098A EP 0455542 A1 EP0455542 A1 EP 0455542A1
Authority
EP
European Patent Office
Prior art keywords
pump
chamber
impeller
axial
section
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
EP91401098A
Other languages
English (en)
French (fr)
Other versions
EP0455542B1 (de
Inventor
Gérard Lefebvre
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.)
Esswein SA
Original Assignee
Esswein SA
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 Esswein SA filed Critical Esswein SA
Publication of EP0455542A1 publication Critical patent/EP0455542A1/de
Application granted granted Critical
Publication of EP0455542B1 publication Critical patent/EP0455542B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2216—Shape, geometry
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps

Definitions

  • the present invention relates to a silent liquid centrifugal motor pump.
  • liquid centrifugal motor pumps include in their pump either a circular pump chamber having a concentric impeller and a deflector or liquid guide nozzle or a pump chamber of increasing size in the form of a volute, defined by a substantially circular chamber and an impeller mounted eccentrically in this chamber.
  • These motor pumps are usually noisy in their operation. Their operating noises come mainly from those generated by liquid overpressures created by cyclic passages of the blades of their front wheel, either their liquid guide spout, or a salient angle of their volute-shaped pump chamber. This situation creates pulsations of pressure in the column of discharged liquid which not only makes the pump noisy, but downstream can generate noise wherever the liquid is transported under pressure.
  • the present invention aims to avoid these drawbacks of known motor pumps, makes it possible to produce a centrifugal liquid motor pump, economical in its manufacture, efficient and silent in its operation.
  • a silent liquid centrifugal motor pump having in its centrifugal pump a pump plate and a pump casing defining a pump chamber in which an impeller rotates
  • the pump chamber consists of two concentric chambers, namely a central revolution chamber, having an axial T-shaped section, called an impeller chamber, in which the impeller rotates concentrically, and an annular peripheral delivery chamber having an axial L-shaped section inverted with rounded angle and substantially wide constant, extending the impeller chamber radially then axially at the arms of the T from its axial T-section.
  • a centrifugal liquid motor pump 1 illustrated schematically and partially in section comprises a centrifugal pump 2 and an electric drive motor 3.
  • the centrifugal pump 2 comprises a pump plate 5, a pump casing 6 and an impeller 7 of a conventional type driven in rotation by a shaft represented diagrammatically by dashed lines 10 of the electric motor 3.
  • the pump plate 5 and the pump casing 6 which are assembled and mounted coaxially with the shaft 10 of the motor 3 define a pump chamber 12.
  • the pump casing 6 having substantially the shape of a cup of revolution comprises in its center, an axial tube 15 serving as a liquid inlet tube, and in its periphery, at least one tube 16 serving as a liquid outlet tube .
  • the impeller 7 mounted on the shaft 10 of the motor 3 and rotating concentrically in the pump chamber 12 comprises spaced vanes 18, oriented from the center of this wheel towards the periphery, a lower flange 19 having the shape of a mushroom and an upper flange 20 having the shape of a funnel which define for the flow of the liquid, a common axial inlet 21, passages leading to the periphery, and lateral outlets 22 parallel to a plane perpendicular to the axis of rotation of the impeller 7.
  • the pump chamber 12 consists of two concentric chambers, namely a central revolution chamber, having an axial T-shaped section, called the impeller chamber 13, in which the impeller 7 concentrically rotates and a peripheral discharge chamber 14 , annular having an inverted L-shaped axial section with rounded angle and substantially constant width, extending radially then axially the impeller chamber 13 at the arms of the T of its axial section in T.
  • the constant width of the L of the axial section in L reversed from the discharge chamber 14 is predetermined substantially equal the dimensions of the lateral peripheral outlets 22 for liquid from the impeller 7.
  • the liquid outlet pipe 16 formed in the pump casing 6 is in tangential communication with the delivery chamber 14 at the level of the large branch of the L of its axial section in inverted L and provided, in the example, with a inclined axis making an angle of approximately 65 ° with the axis of this pump housing 6.
  • the impeller 7 sucks liquid through the inlet pipe 15 of the pump housing 6, its axial common inlet opening 21, in the impeller 7 and the impeller chamber 13, and discharges it through its lateral peripheral outlets 22, the discharge chamber 14 and the outlet pipe 16, towards the outside.
  • the liquid entering the pump 2 is guided and channeled by the vanes 18 and the lower 19 and upper 20 flanges of these vanes of the impeller, calibrated by the lateral peripheral outlets 22 of this impeller 7 whose dimensions are, according to the invention, determined substantially equal to the constant width of the L of the axial section in inverted L of the discharge chamber 14 by this impeller 7 which rotates concentrically with the annular inlet of this chamber 14 without being subjected along this delivery chamber 14 to the tubing of the liquid outlet 16, neither to a variation in flow rate, nor to a change in pressure which generate in the flowing liquid, pulsations which make the pump 2 noisy as well as its circuit repression.
  • the concentric characteristic between the impeller vane 7 and the discharge chamber 14 which extends the impeller chamber 13 and the preset adjustment of the dimensions of the peripheral lateral outlets 22 of the impeller vanes 7 with the width of the L of the axial section in L reversed from the delivery chamber 14 allow a passage without turbulence of the liquid, of the impeller 7 in the delivery chamber 14, through the annular opening of this room 14, and thus reinforce the silent operation of the motor pump 1.
  • the width of the L of the inverted L-shaped axial section of the discharge chamber 14 which is substantially constant and equal to the dimensions of the lateral peripheral outlets 22 for liquid from the impeller 7 promotes permanent formation in this discharge chamber 14 during the operation of the motor pump 1, of a ring full of liquid, that is to say a ring of liquid without air pockets which create a fluctuation in flow and / or pressure of liquid, generating noise.
  • the motor pump 1 illustrated comprises in its centrifugal pump 2, an inlet pipe for liquid 15 connected to a point of a lower part d '' a tank of this dishwasher, two lateral pipes of main outlets for liquid 16 and 17 with inclined axes making an angle of approximately 65 ° with the axis of the pump housing 6 in tangential communication with the discharge chamber 14 at the level of the large branch of the L of the inverted L-shaped axial section of this chamber and connected respectively to two upper and lower sprinkler reels of this dishwasher, a lateral outlet pipe in liquid bypass 24 with an inclined axis forming an angle Approximately 65 ° with the axis of the pump housing 6, in tangential communication with the delivery chamber 14 at the level of the small branch of the L of the axial section in L reversed from this chamber and r connected to a system of microfiltration of waste in the liquid being recycled in this dishwasher, and a lateral liquid pressure tapping pipe 25 with an inclined axis making an angle of
  • the pump plate 5 and the pump casing 6 are preferably produced in an advantageous manner by molding a synthetic material, a metal or a metal alloy.
  • motor pump 1 The structure of motor pump 1 is simple. The manufacture of the motor pump 1 is easy and economical.

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)
  • Exhaust Gas After Treatment (AREA)
EP91401098A 1990-05-04 1991-04-25 Geräuscharme Kreiselmotorpumpe für Flüssigkeiten Expired - Lifetime EP0455542B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005639A FR2661717B1 (fr) 1990-05-04 1990-05-04 Motopompe centrifuge silencieuse a liquide.
FR9005639 1990-05-04

Publications (2)

Publication Number Publication Date
EP0455542A1 true EP0455542A1 (de) 1991-11-06
EP0455542B1 EP0455542B1 (de) 1995-02-15

Family

ID=9396333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401098A Expired - Lifetime EP0455542B1 (de) 1990-05-04 1991-04-25 Geräuscharme Kreiselmotorpumpe für Flüssigkeiten

Country Status (5)

Country Link
EP (1) EP0455542B1 (de)
AT (1) ATE118601T1 (de)
DE (1) DE69107330T2 (de)
ES (1) ES2067883T3 (de)
FR (1) FR2661717B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375924A3 (de) * 2002-06-22 2004-03-10 TUCHENHAGEN GmbH Leitvorrichtung für ein Gehäuse einer Kreiselpumpe
FR2974866A1 (fr) * 2011-05-03 2012-11-09 Francois Gerlier Pompe de circulation d'electrolyte pour engin marin

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191128326A (en) * 1911-12-16 1912-12-16 John Taylor Improvements in Centrifugal Pumps.
SU1413292A1 (ru) * 1987-02-16 1988-07-30 Сумский филиал Харьковского политехнического института им.В.И.Ленина Корпус свободновихревого насоса
EP0298191A2 (de) * 1987-07-06 1989-01-11 Rockwell International Corporation Zylindrischer Pumpenmehrfachauslass-Sammler

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB283261A (de) * 1900-01-01
JPS63109300A (ja) * 1986-10-24 1988-05-13 Matsushita Electric Ind Co Ltd 電動送風機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191128326A (en) * 1911-12-16 1912-12-16 John Taylor Improvements in Centrifugal Pumps.
SU1413292A1 (ru) * 1987-02-16 1988-07-30 Сумский филиал Харьковского политехнического института им.В.И.Ленина Корпус свободновихревого насоса
EP0298191A2 (de) * 1987-07-06 1989-01-11 Rockwell International Corporation Zylindrischer Pumpenmehrfachauslass-Sammler

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 100 (M-470)(2157) 16 avril 1986, & JP-A-60 233396 (MATSUSHITA DENKI SANGYO K.K.) 20 novembre 85 *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 347 (M-743)(3194) 19 septembre 1988, & JP-A-63 109300 (MATSUSHITA ELECTRIC IND CO LTD) 13 mai 1988 *
SOVIET INVENTIONS ILLUSTRATED, DERWENT PUBLICATIONS LTD., SECTION GENERAL/MECHANICAL, ACCESSION Nr. 89-045301/06, 22 MARCH 1989 & SU-A1-1413292 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375924A3 (de) * 2002-06-22 2004-03-10 TUCHENHAGEN GmbH Leitvorrichtung für ein Gehäuse einer Kreiselpumpe
FR2974866A1 (fr) * 2011-05-03 2012-11-09 Francois Gerlier Pompe de circulation d'electrolyte pour engin marin

Also Published As

Publication number Publication date
FR2661717A1 (fr) 1991-11-08
DE69107330T2 (de) 1995-06-14
DE69107330D1 (de) 1995-03-23
FR2661717B1 (fr) 1992-07-03
ES2067883T3 (es) 1995-04-01
EP0455542B1 (de) 1995-02-15
ATE118601T1 (de) 1995-03-15

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