EP1420166A1 - Boítier dotée d'un covercle pour une pompe centrifuge à haute pression - Google Patents

Boítier dotée d'un covercle pour une pompe centrifuge à haute pression Download PDF

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Publication number
EP1420166A1
EP1420166A1 EP03405738A EP03405738A EP1420166A1 EP 1420166 A1 EP1420166 A1 EP 1420166A1 EP 03405738 A EP03405738 A EP 03405738A EP 03405738 A EP03405738 A EP 03405738A EP 1420166 A1 EP1420166 A1 EP 1420166A1
Authority
EP
European Patent Office
Prior art keywords
flange
housing
sealing
sealing surface
pressure
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
EP03405738A
Other languages
German (de)
English (en)
Other versions
EP1420166B1 (fr
Inventor
Wolfram Lienau
Paul Meuter
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.)
Sulzer Pumpen AG
Original Assignee
Sulzer Pumpen 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 Sulzer Pumpen AG filed Critical Sulzer Pumpen AG
Priority to EP20030405738 priority Critical patent/EP1420166B1/fr
Publication of EP1420166A1 publication Critical patent/EP1420166A1/fr
Application granted granted Critical
Publication of EP1420166B1 publication Critical patent/EP1420166B1/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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • 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
    • F04D29/086—Sealings 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

Definitions

  • the invention relates to a high-pressure centrifugal pump in a pot housing a pressure cap and use of this pump.
  • the pot housing pump is usually a multi-stage centrifugal pump at the the wheels "In Line” (i.e. in series) or "Back to Back” on the shaft are arranged.
  • This pump can generate high pressures.
  • the rule is a drive unit on the low pressure side of the shaft coupled.
  • On the opposite side the housing is covered by the Pressure cover completed.
  • the pressure cover has a flange section, with the against the internal pressure, i.e. the pressure of a pumped liquid is sealed.
  • the object of the invention is to provide a pump with a sealing To create pressure cover in which the seal remains leak-free. This The object is achieved by the pump defined in claim 1.
  • the high-pressure centrifugal pump in a pot housing includes one Pressure cover (3).
  • This has a flange section with a flange, with which the pressure cover on a front and annular sealing surface of a Housing is attached by screwing.
  • the flange is through that Screwing deformed elastically.
  • the sealing surface of the housing is in the Area of a base zone of the flange on this with a second Sealing surface in contact.
  • the two sealing surfaces are in front of the Screw together on two at least approximately radially extending cone or ring surfaces. Close these two areas a small angle ⁇ that is in relation to a central axis opens outside. After screwing on the flange are thanks to it elastic deformations the two sealing surfaces pressed against each other and thus the angle between the sealing surfaces is zero.
  • a pot housing pump 1 as shown in FIG. 1, is a pump of the "back to back" type. It contains in a housing 2 a first sub-pump 1 a and a second sub-pump 1 b, which are rotated clockwise or counterclockwise via a common shaft 10. The drive end is indicated with an arrow 100, which indicates the rotation. From a suction port 21 at the drive end, a liquid to be conveyed passes through channels 11 into the sub-pump 1 a, from which the liquid is transported at a medium pressure p L (200 to 500 bar) via further channels 12 a, 12 b to the end of the shaft remote from the drive, where it is deflected by a pressure cover 3 in the sub-pump 1 b. After being transported by the second sub-pump 1b, the liquid emerges from the pump 1 from a centrally arranged pressure connection 22, wherein it has a final pressure which is between approximately 400 and 1000 bar.
  • a pump of the "In Line" type which comprises only one centrifugal pump and in which the pressure port is arranged at the end, ie at the pressure cover.
  • the pressure cover must seal against a pressure p L of 1000 bar.
  • the pressure cover 3 of the pump 1 has - see also FIG. 2 - a flange section with a flange 4, which has a sealing function.
  • the pressure cover 3 carries a terminal one in a profiled through opening 31 Shaft bearings.
  • An axial thrust relief device is installed in the pressure cover 3 and a shaft seal with which a Leakage of liquid into the environment is minimized by reducing the pressure.
  • a plurality of expansion bolts 30 (only one drawn, in FIG. 2 dash-dotted) and the flange 4 is the pressure cover 3 on one end and annular sealing surface 20 of the housing 2 is screwed on.
  • the flange 4 is deformed elastically when screwed on so that the sealing surface 20 of the Housing 2 in the region of a base zone of the flange 4 on this a second sealing surface 40 is in contact.
  • the two sealing surfaces 20, 40 are at least approximately radial before screwing together on two extending cone or ring surfaces, these two surfaces According to the invention include a small angle ⁇ , which is related to a central axis 101 opens to the outside: see Fig. 3. Between the There is a conical gap between the two sealing surfaces 20, 40. The angle ⁇ of this conical gap is a maximum of 1 °. After unscrewing the Flange 4 on the housing 2 are thanks to the elastic deformation of the Flange 4, the two sealing surfaces 20, 40 pressed together: the conical gap is closed; the angle ⁇ between the sealing surfaces 20, 40 is zero in this state.
  • the sealing surface 20 of the housing 2 closes with the central axis 101 or with an angle ⁇ parallel to this straight line.
  • the second Sealing surface 40 accordingly forms an angle ⁇ .
  • the sum of the three angles ⁇ , ⁇ and ⁇ is 180 °.
  • Preferably ⁇ is a right angle.
  • the sealing surface 20 of the housing 2 contains at least one annular groove 25, a seal - in particular an O-ring - in each annular groove 25 is inserted.
  • the sealing ring is with a dash-dotted circle 5 ' indicated. Due to the contact of the two sealing surfaces 20, 40 each forms Annular groove 25 with the overlying second sealing surface 40 a largely closed chamber.
  • a contact pressure p F of the flange 4 is greatest there and decreases with increasing radius r: see the diagram on the right-hand side of FIG. 4, in which the pressure curve within the contact area, namely the base zone of the flange 4, is shown.
  • a liquid-permeable gap between the sealing surfaces 20, 40 is so narrow that the material of the sealing ring 5 cannot be extruded into these spaces. So that the flange 4 does not lift off, the contact pressure p F must be sufficiently large compared to the liquid pressure p L. The larger the angle ⁇ is chosen, the larger p F is in the contact area. It is therefore possible to specify the contact pressure p F in such a way that the flange 4 cannot lift off.
  • the pressure cover 3 or its flange 4 can be designed such that the two sealing surfaces 20, 40 remain in contact in the base zone of the flange 4 at an internal pressure of up to 1000 bar - or even more.
  • Two concentric annular grooves 25 with sealing rings 5 are advantageous provided (not shown). Between the two ring grooves 25 can Sensor can be arranged with the liquid due to a leak could flow through the seal located further inside, can be registered.
  • the second sealing surface 40 does not necessarily have to be on a conical surface lie; it can also be slightly bulbous (convex).
  • the housing 2 and / or the pressure cover 3 is usually made of one Metallic material, especially forged steel.
  • the pump according to the invention can be used to convey water or a aqueous solution - especially sea water - at a pressure of at least 500 bar can be used.
  • the pressure can also be up to 1000 bar or more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP20030405738 2002-11-12 2003-10-14 Boítier dotée d'un covercle pour une pompe centrifuge à haute pression Expired - Lifetime EP1420166B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20030405738 EP1420166B1 (fr) 2002-11-12 2003-10-14 Boítier dotée d'un covercle pour une pompe centrifuge à haute pression

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02405971 2002-11-12
EP02405971 2002-11-12
EP20030405738 EP1420166B1 (fr) 2002-11-12 2003-10-14 Boítier dotée d'un covercle pour une pompe centrifuge à haute pression

Publications (2)

Publication Number Publication Date
EP1420166A1 true EP1420166A1 (fr) 2004-05-19
EP1420166B1 EP1420166B1 (fr) 2005-09-07

Family

ID=32178700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030405738 Expired - Lifetime EP1420166B1 (fr) 2002-11-12 2003-10-14 Boítier dotée d'un covercle pour une pompe centrifuge à haute pression

Country Status (1)

Country Link
EP (1) EP1420166B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2206900A1 (fr) * 2008-12-23 2010-07-14 J. Eberspächer GmbH & Co. KG Bride de liaison

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281631A (en) * 1939-10-06 1942-05-05 Worthington Pump & Mach Corp Centrifugal pump
US3118386A (en) * 1964-01-21 Multi-stage centrifugal pump
EP0248104A1 (fr) * 1986-04-30 1987-12-09 GebràœDer Sulzer Aktiengesellschaft Pompe rotative

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118386A (en) * 1964-01-21 Multi-stage centrifugal pump
US2281631A (en) * 1939-10-06 1942-05-05 Worthington Pump & Mach Corp Centrifugal pump
EP0248104A1 (fr) * 1986-04-30 1987-12-09 GebràœDer Sulzer Aktiengesellschaft Pompe rotative

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2206900A1 (fr) * 2008-12-23 2010-07-14 J. Eberspächer GmbH & Co. KG Bride de liaison
US8336668B2 (en) 2008-12-23 2012-12-25 J. Eberspächer GmbH & Co. KG Flanged joint
CN101769191B (zh) * 2008-12-23 2014-11-05 J.埃贝斯佩歇合资公司 法兰连接装置

Also Published As

Publication number Publication date
EP1420166B1 (fr) 2005-09-07

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