EP3308025B1 - Pumpengehäuse für eine exzenterschneckenpumpe und damit ausgestattete exzenterschneckenpumpe - Google Patents

Pumpengehäuse für eine exzenterschneckenpumpe und damit ausgestattete exzenterschneckenpumpe Download PDF

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Publication number
EP3308025B1
EP3308025B1 EP16745407.3A EP16745407A EP3308025B1 EP 3308025 B1 EP3308025 B1 EP 3308025B1 EP 16745407 A EP16745407 A EP 16745407A EP 3308025 B1 EP3308025 B1 EP 3308025B1
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EP
European Patent Office
Prior art keywords
stator
pump
pump housing
guide surface
flange element
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.)
Active
Application number
EP16745407.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3308025A1 (de
Inventor
Mikael Tekneyan
Philipp NUEBL
Magdalena BRUENING
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme 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 Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP3308025A1 publication Critical patent/EP3308025A1/de
Application granted granted Critical
Publication of EP3308025B1 publication Critical patent/EP3308025B1/de
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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
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/70—Disassembly methods

Definitions

  • the invention relates to a pump housing for an eccentric screw pump according to the preamble of claim 1 and an eccentric screw pump with such a pump housing.
  • the object of the invention is to provide a pump housing for an eccentric screw pump which enables easy access to the interior of the housing and easy removal of the eccentric screw pump arrangement.
  • the main housing body has a circular segment-shaped axial guide surface opposite the cover, a stator flange element complementary to the guide surface, in particular its sealing flange, can be guided axially displaceably by the main housing body.
  • a stator flange element complementary to the guide surface, in particular its sealing flange, can be guided axially displaceably by the main housing body.
  • annular segment-shaped means an annular segment surface with a predetermined radius around the longitudinal axis.
  • the guide surface is preferably located in the lower half of the main housing body, in particular on the inside at the bottom of the main housing body.
  • stator flange element which is displaceably guided on the guide surface can be removed radially upward through the cover opening in the main housing body.
  • a stator flange element that can be coupled to the pump housing is axially displaceable on the guide surface and that the cover fastened to the main housing body prevents the stator flange element from being displaced in the direction of the opening on the drive side.
  • the pump housing and the stator flange element can form a pump housing assembly, which then fits into an existing eccentric screw pump can be installed.
  • Such a structure also offers protection of the stator flange element against rattling when the pump housing is being transported with the cover installed.
  • the stator flange element preferably comprises a hollow cylinder which has a radial guide collar, which can be designed as a sealing flange, at its one drive-side end and a radial stator flange collar at its other, pump-side end, the stator flange element with its guide collar resting on the guide surface and the stator flange collar at a distance from the pump-side opening and can be brought into operative connection with a stator.
  • the stator flange collar advantageously prevents the stator flange element from being completely displaceable into the main housing body when the cover is removed. In this way, the axial displaceability of the stator flange element is limited when the cover is removed, so that correct placement of the stator flange element in the main housing body is easier to accomplish before the cover is fastened to the main housing body.
  • the guide collar of the stator flange element has a chamfer that is complementary to a chamfer of the radially inwardly extending projection of the cover, so that as the cover approaches the main housing body as it is being fastened to one another, the stator flange element placed therebetween axially into that of the rotor-side opening of the Pump housing is moved in the opposite direction and secured against backward movement.
  • the axial guide surface preferably runs only in an area of the main housing body covered by the cover, since machining of the guide surface in the production of the main housing body in the cover opening region is easier in this way.
  • the area covered by the cover is to be understood as a projection of the cover perpendicular to the longitudinal axis onto the main housing body.
  • the cover is preferably provided with an annular circumferential inner circumferential surface opposite the guide surface, which has the same distance radially from the longitudinal axis as the guide surface and is delimited axially on the inside by a radially inwardly extending projection of the cover, which is preferably located opposite the guide surface ,
  • the opposite, Circular segment-shaped inner circumferential surface which has the same distance radially from the longitudinal axis as the guide surface, forms together with the guide surface a closed circular surface, which serves to receive the sealing flange of a complementary, circular stator flange element, which is preferably fluid-tight on such an annular surface with an O-ring rests to seal the cavity of the pump housing from the outside.
  • cover projection towards the longitudinal axis which is preferably opposite from the guide surface of the main housing body and preferably limits the inner peripheral surface of the cover axially such that the guide surface of the main housing body extends further to the drive side of the main housing body than the inner peripheral surface, one on the guide surface and the inner circumferential surface of the stator flange element which is prevented from being displaced in the direction of the drive-side opening by means of the cover projection when the cover is attached to the housing body.
  • the guide surface is axially at least twice as long as the inner circumferential surface in the form of an annular segment, since it can thus be reliably determined whether a stator flange element is in a position displaced in the direction of the drive-side opening, in which the cover should not be attached to the main housing body.
  • the guide surface is delimited axially on the outside by a radial projection of the main housing body.
  • a projection means that a stator flange element guided on the guide surface cannot be pushed axially out of the main housing body, and at the same time represents a positioning stop which determines the correct installation position of an assembly consisting of rotor, stator and stator flange element.
  • the guide surface is further interrupted by a step-like inward projecting fixing projection which divides the guide surface into a pump-side holding area and a drive-side guide area, the holding area extending between the positioning stop and the fixing projection in a groove-like manner in the circumferential direction such that the sealing flange of the stator flange element therein can preferably be inserted in a form-fitting manner in order to fix the stator flange element axially both in the pump-side direction and in the drive-side direction.
  • An axially pump-side edge of the fixing projection is advantageously aligned with an axially pump-side edge of the cover projection in a plane perpendicular to the longitudinal axis.
  • a stator flange element collar (sealing flange) introduced into the holding area of the guide surface is thus secured against displacement in the drive-side direction of the pump housing by the cover and the main housing body.
  • a contact plane between the cover and the main housing body extends obliquely to the longitudinal axis of the pump housing. This enables easier production and assembly of the cover and a better seal between the cover and the main housing body due to the possibility of using a flat sealing element.
  • the main housing body advantageously has a recess which is provided for receiving a flat sealing element and prevents the seal from slipping or falling off during the cover assembly.
  • the main housing body limits the axial displaceability of the stator flange element in a direction away from the drive-side opening, thereby preventing the stator flange element from axially falling out of the pump housing.
  • at least one of the positioning or fixing projections already described is advantageously present.
  • stator flange element is arranged between the stator and the pump housing in such a way that, when the cover is fastened, it fixes a stator end in a complementary stator receptacle of the connecting piece, the stator cannot be removed from the eccentric screw pump when the cover is fastened. H. the cover fixes the stator in its installation position via the stator flange element.
  • stator with the cover removed, can be displaced axially from the connecting piece in the direction of the pump housing such that it detaches from the stator receptacle of the connecting piece. This enables space-saving radial removal of the stator from the eccentric screw pump.
  • the stator, the rotor and the stator flange element preferably form an assembly which can also be supplemented by a coupling element fastened to the drive-side rotor end.
  • the stator, the rotor, the The stator flange element, a coupling element fastened to the drive-side rotor end and a pump-side cardan shaft section adjoining the drive-side end of the coupling element form an assembly, the pump-side cardan shaft section being detachably connected to a further drive-side cardan shaft section which corresponds to the required axial displacement distance of the module, in order to remove the latter from the eccentric screw pump being able to take out;
  • the cavity of the pump housing and the other components located therein are then accessible for maintenance or assembly and disassembly.
  • the required non-rotatable, releasable connection with a sufficient axial displacement distance can also be provided in the coupling element instead of in the cardan shaft according to the same principle.
  • the stator flange element is preferably formed in one piece with the stator.
  • the Fig. 1 shows a pump housing 10 in a drive train of an eccentric screw pump 100, which consists of a tubular main housing body 12 and a cover 14 attachable thereon and a U-shaped seal 16 arranged between the two.
  • the pump housing 10 has an axially extending cavity H, which extends between two end-side openings P, A, ie between a pump-side opening P and a drive-side opening A.
  • the pump-side opening P is enclosed by the main housing body 12 and the cover 14 which is removably attached to it.
  • a contact plane K between the main housing body 12 and the cover 14 extends obliquely to a longitudinal axis L of the pump housing 10 ( Fig. 2 ).
  • To attach the cover 14 to the main housing body 12 are provided with cover bores 18 and matching main housing bores 20 into which screws 19 ( Fig. 3 ) are introduced.
  • the main housing body 12 has an annular segment-shaped guide surface F which lies opposite the cover 14 and extends in the circumferential direction and extends only in an area of the main housing body 12 covered by the cover 14.
  • the guide surface F is delimited axially on the outside by a pump-side projection 22 of the main housing body 12.
  • the guide surface F is interrupted by a radially inwardly projecting fixing projection 24, the purpose of which is described below.
  • a fixing projection 24 is not necessary, so that an uninterrupted guide surface F can also be present.
  • the cover 14 has an inner circumferential surface TF which is opposite the guide surface F and which is spaced radially from the longitudinal axis L by the same distance as the guide surface F and is axially delimited on the inside by a drive-side projection 26 in the cover 14.
  • the Fig. 2 shows a with the pump housing 10 from Fig. 1 axially slidably coupled stator flange element 50 on the guide surface F, the stator flange element 50 being slidable only when the cover 14 is removed.
  • the stator flange element 50 essentially has the shape of a hollow cylinder ( Fig. 3 ), which has a radial guide collar 52 designed as a sealing flange at its one drive-side end and a radial stator flange collar 54 at its other pump-side end, the stator flange element 50 resting with its guide collar 52 on the guide surface F and the stator flange collar 54 from the pump side Opening P is spaced outward from the pump housing 10.
  • the cover 14 attached to the main housing body 12 prevents displacement of the stator flange element 50 in the direction of the drive-side opening A by means of its projection 26.
  • the main housing body 12 with its projection 22 limits the axial displacement of the stator flange element 50 in the opposite direction by the stator flange collar 54 bumps against the projection 22.
  • the main housing body 12 in turn can limit the axial displaceability of the stator flange element 50 in a direction to the drive-side opening A by means of the fixing projection 24.
  • the guide collar 52 of the stator flange element 50 can have a chamfer (not shown) have, which is complementary to a chamfer, also not shown, of the radially inwardly extending projection 26 of the cover 14, so that as the cover 14 progressively approaches the main housing body 12 when they are attached to one another, the stator flange element 50 placed therebetween axially into that of the rotor-side opening A the pump housing 10 is moved in the opposite direction and is secured against wandering back.
  • FIG. 3 and 4 show an example of a removal process on an eccentric screw pump 100 with a drive unit 102, an adjoining two-part propeller shaft with a drive-side part 104 and a pump-side part 106, a coupling element 108, a rotor 110, a stator 112 surrounding the rotor 110 with a stator end 112a, that fits into a connecting piece 114 with a stator receptacle 114a complementary to the stator end 112a.
  • stator flange element 50 which can be formed in one piece with the stator 112, is arranged between the stator 112 and the pump housing 10 in such a way that when the cover 14 is fastened, the stator end 112a is fixed in the complementary stator receptacle 114a of the connecting piece 114.
  • the pump 100 is fixedly connected to a base B in the area of the drive unit 102 and the connecting piece 114.
  • the Fig. 3 shows in particular a state of the eccentric screw pump 100, in which the cover 14 of the pump housing 10 has already been removed, the non-rotatable connection (not shown) of both cardan shaft 104, 106 separated by the cover opening in the main housing body 12 and the assembly consisting of rotor 110, stator 112, stator flange 50, coupling element 108 and part of the propeller shaft 106 on the pump side has already been displaced in the direction of the drive side by a distance x 1 + x 2 , where x 1 is the axial depth of the stator receptacle 114a in the connecting piece 114 and x 2 is a minimal shunting distance to the connecting piece 114.
  • stator flange element 50 and thus also the stator 112 with the cover 14 removed can be displaced axially from the connecting piece 114 in the direction of the pump housing 10 such that it can detach from the stator receptacle 114a of the connecting piece 114.
  • the assembly which can be removed in this way can also be formed only from stator 112, rotor 110 and stator flange element 50, since a releasable, rotationally fixed connection is also possible by means of a two-part coupling element 108 (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP16745407.3A 2015-06-12 2016-06-09 Pumpengehäuse für eine exzenterschneckenpumpe und damit ausgestattete exzenterschneckenpumpe Active EP3308025B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015007521.7A DE102015007521B4 (de) 2015-06-12 2015-06-12 Pumpengehäuse für eine Exzenterschneckenpumpe und damit ausgestattete Exzenterschneckenpumpe
PCT/DE2016/000240 WO2016198037A1 (de) 2015-06-12 2016-06-09 Pumpengehäuse für eine exzenterschneckenpumpe und damit ausgestattete exzenterschneckenpumpe

Publications (2)

Publication Number Publication Date
EP3308025A1 EP3308025A1 (de) 2018-04-18
EP3308025B1 true EP3308025B1 (de) 2020-01-29

Family

ID=56557427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16745407.3A Active EP3308025B1 (de) 2015-06-12 2016-06-09 Pumpengehäuse für eine exzenterschneckenpumpe und damit ausgestattete exzenterschneckenpumpe

Country Status (6)

Country Link
US (1) US10767646B2 (pt)
EP (1) EP3308025B1 (pt)
CN (1) CN107743548B (pt)
BR (1) BR112017025685B1 (pt)
DE (1) DE102015007521B4 (pt)
WO (1) WO2016198037A1 (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018110917A1 (de) * 2018-05-07 2019-11-07 Seepex Gmbh Exzenterschneckenpumpe
RU2758408C2 (ru) * 2019-12-25 2021-10-28 Образовательный Фонд "Талант и успех" Одновинтовой эксцентриковый насос-дозатор
DE102021111925A1 (de) 2021-05-07 2022-11-10 Seepex Gmbh Exzenterschneckenpumpe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT956647B (it) * 1971-06-24 1973-10-10 Kramer H Dispositivo di trasporto partico larmente pompa
NZ220313A (en) * 1986-07-29 1988-06-30 Canadian Ind Progressing cavity pump with fusible coupling between drive and rotor
US5688114A (en) * 1996-03-20 1997-11-18 Robbins & Myers, Inc. Progressing cavity pumps with split extension tubes
DE102008021919A1 (de) * 2008-05-02 2009-11-05 Seepex Gmbh Exzenterschneckenpumpe
GB2455597B (en) * 2008-07-28 2009-12-09 Mono Pumps Ltd Pump
JP5821058B2 (ja) * 2010-12-27 2015-11-24 兵神装備株式会社 一軸偏心ねじポンプ
ES2642378T3 (es) * 2014-05-12 2017-11-16 Hugo Vogelsang Maschinenbau Gmbh Bomba de tornillo excéntrico

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2016198037A1 (de) 2016-12-15
US10767646B2 (en) 2020-09-08
DE102015007521A1 (de) 2016-12-15
EP3308025A1 (de) 2018-04-18
CN107743548A (zh) 2018-02-27
CN107743548B (zh) 2019-05-17
US20180252211A1 (en) 2018-09-06
DE102015007521B4 (de) 2017-01-12
BR112017025685B1 (pt) 2022-10-25
BR112017025685A2 (pt) 2018-08-07

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