EP0307797A2 - Pompe centrifuge - Google Patents

Pompe centrifuge Download PDF

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Publication number
EP0307797A2
EP0307797A2 EP88114671A EP88114671A EP0307797A2 EP 0307797 A2 EP0307797 A2 EP 0307797A2 EP 88114671 A EP88114671 A EP 88114671A EP 88114671 A EP88114671 A EP 88114671A EP 0307797 A2 EP0307797 A2 EP 0307797A2
Authority
EP
European Patent Office
Prior art keywords
wear plates
wear
plates
end walls
sides
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Withdrawn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
EP88114671A
Other languages
German (de)
English (en)
Other versions
EP0307797A3 (fr
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0307797A2 publication Critical patent/EP0307797A2/fr
Publication of EP0307797A3 publication Critical patent/EP0307797A3/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Withdrawn legal-status Critical Current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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • 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
    • F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/622—Adjusting the clearances between rotary and stationary parts

Definitions

  • the invention relates to a centrifugal pump with wear plates arranged on both sides of the impeller, which cover the end walls of the volute casing.
  • the object of the invention is to significantly improve the wear plates in centrifugal pumps, particularly with regard to their design, arrangement and service life.
  • the wear plates according to the invention are disc-shaped and the same on both sides, they can advantageously be used on both sides, that is, if the surface of one side is worn down to a predetermined minimum, the wear plate can be turned easily and the surface the new side is exposed to wear for as long as the surface of the previously worn plate side. This not only brings a very advantageous increase in the service life of the wear plates compared to the previously known centrifugal pumps, but also significantly reduces the material loss that occurs when the wear plate that is worn on both sides is replaced by a new wear plate.
  • the clamping devices consist of pressure screws and bolts which are arranged in the end walls of the volute casing so far that they engage the wear plates in the outer edge region and press them against the volute casing. It is particularly expedient to use pressure screws and bolts which correspond to the chemical stress on the pump, but which are softer than the bracing wear plate. This very advantageously achieves a bending stress-free clamping of the wear plates between the end walls and the volute casing.
  • the outer edges of the wear plates are designed with equally inclined surfaces, which bear against counter surfaces which are correspondingly inclined in the spiral housing.
  • the wear plates are arranged at a short distance from the end walls, so that between the wear plates and the forehead walls remain a cavity that is in open communication with the interior of the volute.
  • liquid from the space in which the impeller is located enters the cavity between the wear plate and the end wall, which leads to pressure equalization on both sides of the wear plate, which very advantageously results in the wear plates be kept free from bending stresses.
  • the wear plates can be made relatively thin-walled, which lowers the acquisition costs and the material losses when replacing the worn plate with a new one are significantly reduced.
  • the wear plates can be easily released from the clamping and can be moved radially by the clamping device designed according to the invention.
  • worn zones of the wear plates can be turned out of particularly weary areas of the pump and not, or less worn zones can be screwed into these areas and re-tensioned.
  • the service life of the wear plates is further increased and the efficiency of the pump is favorably influenced by approximately restoring the operating gap.
  • wear plates (2, 3) are arranged on both sides of the impeller (1) of the centrifugal pump, which cover the end walls (4, 5) of the volute casing (6).
  • these wear plates (2, 3) arranged on both sides of the impeller (1) are disc-shaped, with surfaces (7, 8 and 9, 10) which run identically on both sides and between the spiral housing (6) and the end walls (4, 5) clamped by means of clamping devices.
  • Several clamping screws (11, 12), which are evenly distributed over the circumference, are provided as tensioning devices, which are operatively connected to the wear plates (2, 3) via bolts (13, 14).
  • the bolts (13, 14) can be moved in the end walls (4, 5) in the axial direction, but are secured against rotation.
  • the wear plates are not subjected to any disadvantageous torsional stress on the part of the pressure screws when tensioning between the volute casing (6) and the end walls (4, 5).
  • the pressure screws (11, 12) are arranged in the end walls (4, 5) of the volute casing (6) so far that they engage the wear plates (2, 3) in the outer edge area and press them onto the volute casing (6).
  • the outer edges of the wear plates (2, 3) are formed with equally inclined surfaces (15, 16 and 17, 18) which, in the clamped state, rest firmly against counter surfaces (19, 20) which are designed to be inclined in the spiral housing (6) .
  • Ceramic plates can therefore be used particularly advantageously as wear plates, which, due to their hardness and brittleness, are very sensitive to beige and compressive stresses, but are far superior to the previously known wear plates made of high-alloy steel and the like in terms of their wear resistance. It goes without saying that in addition to wear plates made of ceramic according to the invention, wear plates made of plastic, hard rubber and the like can also be clamped between the spiral housing (6) and the end walls (4, 5) with the same advantages. Metal or plastic plates coated with ceramics and similarly hard and brittle, highly wear-resistant materials can also be used.
  • the wear plates (2, 3) are arranged at a short distance from the end walls (4, 5), so that a cavity (21. Between the wear plates (2, 3) and the end walls (4, 5) or 22) remains, which is in open connection (23, 24) with the interior of the volute housing in which the impeller (1) is located.
  • the wear plates according to the invention can therefore be made relatively thin-walled, which leads to a considerable reduction in the loss of material when replacing the worn plate with a new one.
  • a further and very special advantage of the wear plates (2, 3) designed according to the invention is that, after wear on one side of their surface, they can be turned or exchanged for one another and thus subjected to wear on both sides, thereby reducing the service life of these wear plates the previously known wear plates, is increased many times over.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP88114671A 1987-09-15 1988-09-08 Pompe centrifuge Withdrawn EP0307797A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3730932 1987-09-15
DE3730932 1987-09-15
DE19873731269 DE3731269A1 (de) 1987-09-15 1987-09-17 Kreiselpumpe
DE3731269 1987-09-17

Publications (2)

Publication Number Publication Date
EP0307797A2 true EP0307797A2 (fr) 1989-03-22
EP0307797A3 EP0307797A3 (fr) 1989-11-08

Family

ID=25859785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114671A Withdrawn EP0307797A3 (fr) 1987-09-15 1988-09-08 Pompe centrifuge

Country Status (2)

Country Link
EP (1) EP0307797A3 (fr)
DE (1) DE3731269A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009026322A1 (fr) 2007-08-22 2009-02-26 Mp Pumps Inc. Pompe centrifuge à auto-amorçage
IT201700024151A1 (it) * 2017-03-03 2018-09-03 Varisco S R L Pompa centrifuga e metodo per la regolazione della distanza del piatto di usura dalla girante di una pompa centrifuga
WO2018158617A1 (fr) * 2017-03-03 2018-09-07 Varisco S.P.A. Pompe centrifuge et procédé de réglage de la distance de la plaque d'usure par rapport au rotor d'une pompe centrifuge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326545C2 (de) * 1993-08-07 1996-08-01 Klein Schanzlin & Becker Ag Kreiselpumpe mit einer oder mehreren Schleißwänden

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878429A (en) * 1930-05-09 1932-09-20 John W Staup Dredge pump
FR723344A (fr) * 1930-12-10 1932-04-07 Beaudrey Et Bergeron Soc Perfectionnements aux pompes centrifuges
FR2290133A6 (fr) * 1973-02-09 1976-05-28 Materiel Processing Internal Pompe centrifuge
DE3513116A1 (de) * 1985-04-12 1986-10-23 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Spaltdichtung an laufraedern von kreiselpumpen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009026322A1 (fr) 2007-08-22 2009-02-26 Mp Pumps Inc. Pompe centrifuge à auto-amorçage
IT201700024151A1 (it) * 2017-03-03 2018-09-03 Varisco S R L Pompa centrifuga e metodo per la regolazione della distanza del piatto di usura dalla girante di una pompa centrifuga
WO2018158617A1 (fr) * 2017-03-03 2018-09-07 Varisco S.P.A. Pompe centrifuge et procédé de réglage de la distance de la plaque d'usure par rapport au rotor d'une pompe centrifuge
CN110392786A (zh) * 2017-03-03 2019-10-29 瓦瑞斯科股份责任有限公司 离心泵及调节离心泵的耐磨板与叶轮之间的距离的方法
RU2751118C2 (ru) * 2017-03-03 2021-07-08 Вариско С.Р.Л. Центробежный насос и способ регулировки расстояния износостойкой пластины от рабочего колеса центробежного насоса
RU2751118C9 (ru) * 2017-03-03 2021-12-16 Вариско С.Р.Л. Центробежный насос и способ регулировки расстояния износостойкой пластины от рабочего колеса центробежного насоса
US11624367B2 (en) 2017-03-03 2023-04-11 Varisco S.r.l. Centrifugal pump and method of adjusting the distance of the wear plate from the impeller of a centrifugal pump

Also Published As

Publication number Publication date
EP0307797A3 (fr) 1989-11-08
DE3731269A1 (de) 1989-03-23

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