EP2871363A1 - Agencement d'étanchéité, dispositif de transport doté d'un agencement d'étanchéité et procédé de fonctionnement de l'agencement d'étanchéité - Google Patents

Agencement d'étanchéité, dispositif de transport doté d'un agencement d'étanchéité et procédé de fonctionnement de l'agencement d'étanchéité Download PDF

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Publication number
EP2871363A1
EP2871363A1 EP20130191707 EP13191707A EP2871363A1 EP 2871363 A1 EP2871363 A1 EP 2871363A1 EP 20130191707 EP20130191707 EP 20130191707 EP 13191707 A EP13191707 A EP 13191707A EP 2871363 A1 EP2871363 A1 EP 2871363A1
Authority
EP
European Patent Office
Prior art keywords
recess
sealing
sealing arrangement
cavity
flushing medium
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
EP20130191707
Other languages
German (de)
English (en)
Other versions
EP2871363B1 (fr
Inventor
René Triebe
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.)
Maag Pump Systems AG
Original Assignee
DOVER PUMP SOLUTIONS GROUP EUROP GmbH
Dover Pump Solutions Group Europe GmbH
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 DOVER PUMP SOLUTIONS GROUP EUROP GmbH, Dover Pump Solutions Group Europe GmbH filed Critical DOVER PUMP SOLUTIONS GROUP EUROP GmbH
Priority to EP13191707.2A priority Critical patent/EP2871363B1/fr
Priority to CN201410558029.1A priority patent/CN104632614B/zh
Publication of EP2871363A1 publication Critical patent/EP2871363A1/fr
Application granted granted Critical
Publication of EP2871363B1 publication Critical patent/EP2871363B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons

Definitions

  • the present invention relates to a seal assembly, a conveyor, in particular a gear pump, with a seal assembly and a method for operating the seal assembly.
  • gear pumps are used as conveyors below polymerization. These gear pumps have the task to discharge the finished reaction product from the reactor and to promote it in further plant components.
  • a sheathing or enclosure of the critical (possibly leaking) process components eg the gear pump
  • an additional Provide protective housing for this purpose, the relevant system components are covered, for example, with a metal jacket, wherein the gap between the system components and the protective housing is flooded with pure nitrogen.
  • this has considerable disadvantages in terms of the price and also in terms of the accessibility of the system.
  • gas-filled metal O-rings are installed in the cover or housing.
  • the present invention therefore an object of the invention to provide a seal assembly that can be implemented easily and inexpensively, and which can be optionally retrofitted to existing gear pumps.
  • the present invention initially relates to a sealing arrangement for conveying devices, in particular for gear pumps, in which an inner space can be sealed off from an outer space.
  • the sealing arrangement comprises at least two parts to be sealed, each having a sealing surface, wherein a recess is present in at least one of the sealing surfaces.
  • the inventive sealing arrangement is characterized in that a sealing element is present, which partially fills the recess, so that a cavity remains in the recess, that the recess is connected via a feed channel to a source with flushing medium, that the recess via a discharge channel is connected and that the cavity is at least partially actively purged with flushing medium.
  • sealing element is an O-ring or a spiral wound gasket.
  • inventive sealing arrangement are that the feed channel and the discharge channel are at least partially formed as grooves in the sealing surface.
  • the feed channel and / or the discharge channel can easily be retrofitted with an existing recess with sealing element by the supply and discharge channels are incorporated into one or both sealing surfaces, including, for example, a Flex is particularly suitable.
  • FIG. 1 Further embodiments of the sealing arrangement according to the invention consist in that the feed channel and / or the discharge channel leads, at least in sections, through at least one part to be sealed to an outer connection point which does not lie in the sealing surfaces.
  • Still further embodiments of the inventive sealing arrangement are that the discharge channel is connected at the outer end with a throttle valve.
  • the cavity flushed with flushing medium which is then simply blown off via the throttle valve into the environment.
  • inventions of the inventive sealing arrangement are that the source, the feed channel, the recess or at least one cavity in the recess and the discharge channel form a closed flushing medium circuit.
  • one part is a housing of the conveyor and the second part is a lid on the housing of the conveyor.
  • Yet further embodiments of the inventive sealing arrangement are that a flow sensor for measuring a Spülmediumhnes is provided through the recess.
  • the measurement of the flushing medium flow makes it possible to check the sealing arrangement with respect to its reliability. Thus, excessive rinsing medium loss due to corrosion damage can be detected by the measurement, and a repair can be arranged in a timely manner.
  • flushing medium is an inert gas, in particular nitrogen, or an inert liquid, in particular a silicone oil.
  • Still further embodiments of the inventive sealing arrangement are that the sealing element is fixed by fixing elements within the recess.
  • Still further embodiments of the inventive sealing arrangement consist in that a liquid sealant is present between the sealing surfaces, wherein for example Permatex® High-Temp Red RTV Silicone Gasket (Permatex, 10 Columbus Bld, Hartford, Connecticut 06106, USA - www.permatex. com) is usable.
  • a liquid sealant for example Permatex® High-Temp Red RTV Silicone Gasket (Permatex, 10 Columbus Bld, Hartford, Connecticut 06106, USA - www.permatex. com) is usable.
  • the present invention is directed to a conveying device, in particular a gear pump, for conveying a conveying medium in an interior, which is substantially hermetically sealed from an outer space, wherein the conveying device comprises at least one sealing arrangement according to one of the embodiments described above.
  • the present invention is directed to a method of operating a seal assembly according to directed to one of the embodiments described above, wherein a sealing element is present, which partially fills a recess, so that a cavity remains in the recess, wherein the cavity is flushed with a flushing medium.
  • a variant of the inventive method is that a flow of the flushing medium through the cavity or a pressure of the flushing medium is kept constant in the cavity.
  • Fig. 1 is a plan view of a housing 2 of a gear pump shown, wherein the viewing direction is parallel to waves on which intermeshing gears are mounted. The waves and the gears are in Fig. 1 Not shown. Since the pump housing final lid is not present, the view is free in the interior 7 with spectacle-shaped cross-section. To the spectacle-shaped contour is a recess 9 as part of a seal assembly 1 can be seen. The recess 9 is completely guided around the spectacle-shaped contour and is connected to a feed channel 11 and a discharge channel 12, both of which are guided through the housing 2 to the outside. Furthermore, bores 10 can be seen, which are used for fastening a housing cover (in Fig. 1 not shown) are provided on the pump housing 2. The housing cover is removed for mounting or dismounting the gear pump. During normal operation of the gear pump, the inner space 7 must be moved to the outer space 8 be as tight as possible. For this purpose, the seal arrangement between the housing cover and the housing is provided.
  • the recess 9 is - as in Fig. 1 shown - incorporated into the housing 2.
  • the recess 9 may also be incorporated in the housing cover.
  • the recess 9 is provided both in the housing 2 and in the housing cover.
  • Fig. 2 shows a section through the seal assembly 1 along the in Fig. 1 drawn section line AA.
  • the seal assembly 1 consists of a first part 2, for example a housing cover for a gear pump, and a second part 3, for example a housing of a gear pump.
  • a recess 9 for partially receiving a sealing element 4 is provided, which does not completely fill the recess 9, so that a cavity 5 remains even when the first part 2 is pressed onto the second part 3.
  • the sealing element 4 must project beyond the sealing surface 16 for a good seal.
  • Suitable flushing medium is, for example, an inert gas, in particular nitrogen, or an inert liquid, in particular a silicone oil.
  • Fig. 3 shows a section according to Fig. 2 by a further embodiment of the present invention.
  • a fixing 8 which ensures that the sealing element 4 is fixed in position. This ensures that the cavity 5 has a desired cross-section and that the flushing medium can flow unhindered through the recess 9.
  • the fixing element 8 in any position within the Recess 9 can be arranged. It is also conceivable that a plurality of fixing elements 8 are provided, so that the sealing element 4, for example, can be held centrally in the recess 9, whereby 4 cavities 5 arise on both sides of the sealing element.
  • Fig. 4 shows in a section perpendicular to in Fig. 1 apparent sealing surface 15 a detail C of the discharge channel 12 in the region of a connection point.
  • the discharge channel 12 is incorporated in the sealing surface 15.
  • the discharge channel 12 does not lead in the sealing surface 15 to the outside of the housing 2.
  • the discharge channel 12 is guided through a bore 13 in the housing 2 to a connection point 14.
  • This has the advantage that the sealing surfaces 15, 16 is not passed through the connection point 14, whereby a simplified connection option for valves, connecting lines and the like is offered.
  • For connecting the flushing medium source on the side of the feed channel 11 (FIG. Fig. 1 ) is a corresponding connection point - as in Fig. 4 is shown for the discharge channel 12 - provided.
  • a further embodiment of the present invention is that the feed channel 11 and the discharge channel 12 in a modification to that in the Fig. 1 and 4 variant shown is not incorporated in the housing 2 but in the housing cover. It is conceivable that a bore through the housing cover directly to the recess 9 and Vietnamese Cavity 5 is provided to provide this with flushing medium.
  • the sealing gap between the sealing surfaces 15 and 16 is configured as a liquid seal by a liquid sealant is introduced into the sealing gap.
  • the sealant available for this purpose is, for example, the sealant available under the trade name Permatex® High-Temp Red RTV Silicone Gasket (Permatex, 10 Columbus Bld, Hartford, Connecticut 06106, USA - www.permatex.com) ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP13191707.2A 2013-11-06 2013-11-06 Pompe à engrenages avec un ensemble d'étanchéité Active EP2871363B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13191707.2A EP2871363B1 (fr) 2013-11-06 2013-11-06 Pompe à engrenages avec un ensemble d'étanchéité
CN201410558029.1A CN104632614B (zh) 2013-11-06 2014-10-20 密封结构、带密封结构的输送装置及密封结构的操作方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13191707.2A EP2871363B1 (fr) 2013-11-06 2013-11-06 Pompe à engrenages avec un ensemble d'étanchéité

Publications (2)

Publication Number Publication Date
EP2871363A1 true EP2871363A1 (fr) 2015-05-13
EP2871363B1 EP2871363B1 (fr) 2020-10-07

Family

ID=49546301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13191707.2A Active EP2871363B1 (fr) 2013-11-06 2013-11-06 Pompe à engrenages avec un ensemble d'étanchéité

Country Status (2)

Country Link
EP (1) EP2871363B1 (fr)
CN (1) CN104632614B (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2700381A1 (de) * 1977-01-07 1978-07-13 Bosch Gmbh Robert Verdraengermaschine
DE3116283A1 (de) * 1981-04-24 1982-11-11 Lederle GmbH Pumpen- und Maschinenfabrik, 7803 Gundelfingen "kreiskolbenpumpe mit einer gleitringdichtung"
US4993720A (en) * 1988-08-15 1991-02-19 Ciotola Alfredo A Self-sealing mechanical seal gland for pumps and other machinery
DE202004018733U1 (de) 2003-12-03 2005-04-14 The Boc Group Plc., Windlesham Pumpe
WO2013127464A1 (fr) 2012-03-02 2013-09-06 Maag Pump Systems Ag Système d'étanchéité, dispositif de transport pourvu d'un système d'étanchéité ainsi que procédé permettant de faire fonctionner ledit système d'étanchéité

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015602A1 (de) * 2006-04-04 2007-10-11 Hydac System Gmbh Einrichtung zum Fördern strömungsfähiger Medien, insbesondere von Schmierstoffen
CN202091196U (zh) * 2011-05-24 2011-12-28 博顿液压股份有限公司 齿轮泵及马达的密封件

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2700381A1 (de) * 1977-01-07 1978-07-13 Bosch Gmbh Robert Verdraengermaschine
DE3116283A1 (de) * 1981-04-24 1982-11-11 Lederle GmbH Pumpen- und Maschinenfabrik, 7803 Gundelfingen "kreiskolbenpumpe mit einer gleitringdichtung"
US4993720A (en) * 1988-08-15 1991-02-19 Ciotola Alfredo A Self-sealing mechanical seal gland for pumps and other machinery
DE202004018733U1 (de) 2003-12-03 2005-04-14 The Boc Group Plc., Windlesham Pumpe
WO2013127464A1 (fr) 2012-03-02 2013-09-06 Maag Pump Systems Ag Système d'étanchéité, dispositif de transport pourvu d'un système d'étanchéité ainsi que procédé permettant de faire fonctionner ledit système d'étanchéité

Also Published As

Publication number Publication date
CN104632614A (zh) 2015-05-20
CN104632614B (zh) 2018-09-14
EP2871363B1 (fr) 2020-10-07

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