EP0907029A2 - Ensemble de pompe centrifuge - Google Patents

Ensemble de pompe centrifuge Download PDF

Info

Publication number
EP0907029A2
EP0907029A2 EP98118524A EP98118524A EP0907029A2 EP 0907029 A2 EP0907029 A2 EP 0907029A2 EP 98118524 A EP98118524 A EP 98118524A EP 98118524 A EP98118524 A EP 98118524A EP 0907029 A2 EP0907029 A2 EP 0907029A2
Authority
EP
European Patent Office
Prior art keywords
flange
centrifugal pump
pump unit
retaining ring
unit according
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
EP98118524A
Other languages
German (de)
English (en)
Other versions
EP0907029B1 (fr
EP0907029A3 (fr
Inventor
Niels Due Jensen
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.)
Grundfos AS
Original Assignee
Grundfos AS
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 Grundfos AS filed Critical Grundfos AS
Publication of EP0907029A2 publication Critical patent/EP0907029A2/fr
Publication of EP0907029A3 publication Critical patent/EP0907029A3/fr
Application granted granted Critical
Publication of EP0907029B1 publication Critical patent/EP0907029B1/fr
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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid 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
    • F04D29/40—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
    • F04D29/4293—Details of fluid inlet or outlet

Definitions

  • the invention relates to a centrifugal pump unit with the in the preamble of Claim 1 specified features.
  • Flange connections have become established when connecting pipes. These connections are particularly suitable for medium and large pipes Cross-section as well as for medium and high pressure loads. Such Flange connection connects two abutting tubes mechanically and seals this via a gasket pressed in between the flanges.
  • At the Pipeline construction becomes the flanges or flanged pipe sections usually connected to a pipe by welding on site, so that both the adaptation to the type of flange used and the alignment the flange bores of a common flange connection in the Usually no problems.
  • the invention is based on the object of providing a centrifugal pump unit, that has at least one such flange, so train it with low production costs and low storage costs is adaptable to different flange standards.
  • the flange connection becomes functional in two distinguishing modules separated, namely in a sealing flange and one Fastening flange, the sealing flange being firmly connected to the pump set and the mounting flange is form-fitting via a retaining ring, however is detachably connected to the sealing flange. It can therefore be different Fastening flanges can be provided on the same centrifugal pump unit without make structural changes, but only by replacing this mounting flange.
  • sealing flange and mounting flange through a one-piece retaining ring are positively connected to each other in a circumferential recess between the sealing flange and mounting flange the high forces to be absorbed by the mounting flange be safely transferred to the sealing flange in order to achieve the required surface pressure ensure in the area of the sealing surfaces.
  • the one-piece retaining ring can be ensured that the over the sealing flange pushed mounting flange does not accidentally loosen or the on the Sealing flange attached retaining ring is lost.
  • sealing flange and Mounting flange still offers especially in a centrifugal pump unit the particular advantages that sealing flange and mounting flange from different Materials and that there is also a material accumulation, as is the case with one-piece connection flanges in this area, is avoided.
  • the former is advantageous, for example, if it is Special pumps deals that are made of highly corrosion-resistant materials or coated Materials have to exist, because they are also comparatively for these applications Find inexpensive cast iron mounting flanges can.
  • centrifugal pump units of the type mentioned at the outset have two Connection piece, namely a pressure port and a suction port, wherein then each of these nozzles preferably consists of a fixed flange connection with the pump housing connected sealing flange and by means of a Retaining ring is positively attached to the mounting flange.
  • the invention offers Arrangement still has the advantage that the mounting flange with respect the sealing flange, so the fixed pump housing is rotatable, so that Pump unit without problems to existing flange connections in any Location can be connected, since an alignment of the flange bores by turning the Mounting flange on the sealing flange can be achieved.
  • the retaining ring which should not normally be closed, making it a simple one Disassembly of the mounting flange is possible, a rectangular cross section exhibit when particularly high forces are to be transmitted, as with others Cross-sectional shapes Problems arise with the permissible surface pressure could.
  • the mounting flange in a locking position should be kept on the sealing flange, then it is appropriate to To form a retaining ring as a spring washer, with a preferably circular or oval cross-sectional contour.
  • the retaining ring should be in the untensioned Extend the state over an arc in the range between 330 ° and 350 °, on the one hand to provide a form-fitting hold over the entire circumference between the mounting flange and the sealing flange, on the other hand to be assembled or disassembled.
  • the dimensions between the sealing flange, retaining ring and mounting flange are preferred chosen so that the retaining ring designed as a spring washer Has inner diameter that is smaller than that in the untensioned state Outside diameter of the sealing flange, but larger than the diameter of the Sealing flange at the bottom of the recess. This dimensioning will achieved that, on the one hand, the retaining ring inside after fitting the recess on the sealing flange side is held, but on the other hand in this Location is still compressible. This travel can then be used to to hold the mounting flange on the sealing flange.
  • a mounting flange according to the invention can be inexpensively cast be produced, with machining usually on the inner circumference will be necessary, possibly also in the area of the screw head supports.
  • the centrifugal pump unit shown in FIG. 1 is a three-stage inline centrifugal pump consisting essentially of one Pump foot 1, pump stages 2, a coupling 3 and an adjoining one (not shown) engine. Pump units of this type are adequate known, it is only used as an example on high-pressure centrifugal pumps the CR series from Grundfos, Denmark.
  • connection piece 5, 6 in the form of connecting flanges. 1 is marked with 5 the suction connection and with 6 the pressure connection. Both Connection pieces 5, 6 are like the connection flange shown enlarged in FIG. 2 5 trained.
  • Such a connecting flange which closes a tubular housing part 7, consists of a sealing flange 8, a mounting flange 9 and a Retaining ring 10.
  • the sealing flange 8 which is approximately aligned with the tubular housing part 7 connects and in one piece with the pump base made of cast iron is formed, has an annular flat sealing surface in its outer end face 11, as is common with other flanges.
  • the outer circumference of the sealing flange 8 is designed as a cylindrical surface and has half the length a circumferential groove 12 which is semicircular in cross section.
  • the groove 12 is part of a between the sealing flange 8 and the fastening flange 9 formed circumferential recess 13, in which the retaining ring 10 is incorporated is.
  • the mounting flange 9 is a substantially cylindrical ring formed and has a number of holes arranged evenly distributed 14, through which screws can be guided in a manner known per se on the sides facing away from one another to be fastened or fastened to one another Connection flanges are supported.
  • the mounting flange 9 is on his The inside is cylindrical, with the inside diameter in this area corresponds at least to the outer diameter D3 of the sealing flange 8.
  • the part of the recess 13 on the sealing flange side is designed as a step 15 and there the cross-sectional contour of the retaining ring 10 is adapted accordingly.
  • the retaining ring 10 is designed as a spring ring and extends over a circular arc of 340 ° in the untensioned state.
  • the retaining ring 10 is designed such that its inner diameter D1 is smaller than the outer diameter D2 of the sealing flange 8, but larger than the diameter D3 at the bottom of the groove 12.
  • the retaining ring 10 must therefore first of all for mounting on the outer circumference of the sealing flange 8 spread against its internal stress and guided up to the level of the groove 12 become. After relaxation, the ring 10 dips into the groove 12, but not to the bottom of the groove, but a short distance from it, so that it is still in Can deflect direction on the bottom of the groove 12, but on the other hand already is positively held in the groove 12.
  • the Inner diameter smaller than the inner diameter D4 of the other gradation is dimensioned such that it is 9 slides in the direction 16 over the retaining ring 10.
  • the mounting flange 9 on the sealing flange 8 is latching or only held non-positively, but it is rotatable relative to the sealing flange 8 arranged.
  • the holes 14 can be covered with in a simple manner the corresponding holes in the counter flange, without that To change the position of the pump set.
  • the mounting flange 9 against another, e.g. B. against one Mounting flange exchanged with a different number of holes 14 the mounting flange 9 is initially opposite to the direction 16 overcoming the spring force of the retaining ring 10 on the tubular housing part 7, after which the retaining ring after spreading in the direction of 16 and subsequently also the mounting flange 9 can be removed.
  • the new mounting flange is then installed in the reverse direction Sequence.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP98118524A 1997-10-04 1998-09-30 Ensemble de pompe centrifuge Expired - Lifetime EP0907029B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19743833A DE19743833A1 (de) 1997-10-04 1997-10-04 Kreiselpumpenaggregat
DE19743833 1997-10-04

Publications (3)

Publication Number Publication Date
EP0907029A2 true EP0907029A2 (fr) 1999-04-07
EP0907029A3 EP0907029A3 (fr) 1999-10-13
EP0907029B1 EP0907029B1 (fr) 2003-09-10

Family

ID=7844555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98118524A Expired - Lifetime EP0907029B1 (fr) 1997-10-04 1998-09-30 Ensemble de pompe centrifuge

Country Status (2)

Country Link
EP (1) EP0907029B1 (fr)
DE (2) DE19743833A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007014876A1 (fr) * 2005-07-29 2007-02-08 Dab Pumps S.P.A. Pompe hydraulique
EP2112380A1 (fr) * 2008-04-21 2009-10-28 DP Industries B.V. Pompe centrifuge en plusieurs étages en construction en ligne
IT201600072971A1 (it) * 2016-07-13 2018-01-13 Calpeda A Spa Pompa provvista di flange perfezionate
CN109751266A (zh) * 2018-12-10 2019-05-14 贵州电网有限责任公司 一种变电站用火电机组脱硫系统氧化风机
CN110469732A (zh) * 2019-09-12 2019-11-19 德帕姆(杭州)泵业科技有限公司 速拆型螺旋顶杆式泵阀安装结构
CN113217468A (zh) * 2021-06-23 2021-08-06 山东泰星新材料股份有限公司 一种离心泵的进出口连接结构及使用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911239A (en) 1959-05-18 1959-11-03 Sr George B Marzolf Multiple piece pipe flange
US3895883A (en) 1973-10-29 1975-07-22 James Miller Pedersen Propeller pitch indicator
US4877372A (en) 1987-09-04 1989-10-31 Grundfos International A/S Multi-stage rotary pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2812959A (en) * 1953-08-21 1957-11-12 Westinghouse Air Brake Co Flange union fitting with gland expandible into an opening
DE1650116B1 (de) * 1966-05-24 1970-09-03 Mannesmann Ag Flanschverbindung fuer Druckrohrleitungen
FI53274A (fr) * 1974-02-22 1975-08-23 Goeran Sundholm
US5509699A (en) * 1994-06-06 1996-04-23 Certainteed Corporation Mechanical joint pipe adapter with inserted flexible spline

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911239A (en) 1959-05-18 1959-11-03 Sr George B Marzolf Multiple piece pipe flange
US3895883A (en) 1973-10-29 1975-07-22 James Miller Pedersen Propeller pitch indicator
US4877372A (en) 1987-09-04 1989-10-31 Grundfos International A/S Multi-stage rotary pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007014876A1 (fr) * 2005-07-29 2007-02-08 Dab Pumps S.P.A. Pompe hydraulique
EP2112380A1 (fr) * 2008-04-21 2009-10-28 DP Industries B.V. Pompe centrifuge en plusieurs étages en construction en ligne
IT201600072971A1 (it) * 2016-07-13 2018-01-13 Calpeda A Spa Pompa provvista di flange perfezionate
EP3269984A1 (fr) * 2016-07-13 2018-01-17 CALPEDA S.p.A. Pompe avec brides améliorées
CN109751266A (zh) * 2018-12-10 2019-05-14 贵州电网有限责任公司 一种变电站用火电机组脱硫系统氧化风机
CN110469732A (zh) * 2019-09-12 2019-11-19 德帕姆(杭州)泵业科技有限公司 速拆型螺旋顶杆式泵阀安装结构
CN113217468A (zh) * 2021-06-23 2021-08-06 山东泰星新材料股份有限公司 一种离心泵的进出口连接结构及使用方法

Also Published As

Publication number Publication date
EP0907029B1 (fr) 2003-09-10
EP0907029A3 (fr) 1999-10-13
DE19743833A1 (de) 1999-04-15
DE59809550D1 (de) 2003-10-16

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