EP3538766B1 - Eccentric screw pump - Google Patents

Eccentric screw pump Download PDF

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Publication number
EP3538766B1
EP3538766B1 EP17800800.9A EP17800800A EP3538766B1 EP 3538766 B1 EP3538766 B1 EP 3538766B1 EP 17800800 A EP17800800 A EP 17800800A EP 3538766 B1 EP3538766 B1 EP 3538766B1
Authority
EP
European Patent Office
Prior art keywords
rotor
housing
joint
progressive cavity
drive
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
EP17800800.9A
Other languages
German (de)
French (fr)
Other versions
EP3538766A1 (en
Inventor
Dirk Overmeier
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.)
Seepex GmbH
Original Assignee
Seepex GmbH
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Filing date
Publication date
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Publication of EP3538766A1 publication Critical patent/EP3538766A1/en
Application granted granted Critical
Publication of EP3538766B1 publication Critical patent/EP3538766B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/107Rotary-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
    • F04C2/1071Rotary-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
    • F04C2/1073Rotary-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
    • F04C2/1075Construction of the stationary member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/107Rotary-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
    • F04C2/1071Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00Manufacture
    • F04C2230/60Assembly methods
    • F04C2230/603Centering; Aligning
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/10Stators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/20Rotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/30Casings or housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/60Shafts

Definitions

  • Such an eccentric screw pump is a pump from the group of rotating displacement pumps, which are used to convey a wide variety of media and in particular liquid media and also highly viscous liquids in a wide variety of industrial sectors.
  • the liquids to be conveyed can, for. B. also contain solids.
  • the pump is preferably used in mining, mining, tunneling or the like.
  • the stator consists of z. B. elastic material and is usually surrounded by a one-piece or multi-piece stator casing or stator housing (z. B. made of metal).
  • the elastomeric stator can be firmly connected to the stator casing, for. B. be vulcanized into this.
  • the invention also includes embodiments in which the stator is detachable and therefore replaceable from the stator casing.
  • stators made of other material e.g. B. captured from metal.
  • the pump housing is also referred to as the suction housing.
  • a housing part is usually provided that, as a connecting piece, for. B.
  • a pressure port so that the pressure port z. B. can be connected to the stator on the pressure side.
  • the pump housing suction housing
  • the connection nozzle pressure nozzle
  • the rotating connection which at the same time ensures eccentricity, between the drive or the connecting shaft, on the one hand, and the rotor, on the other hand, takes place via the coupling rod arranged in the pump housing.
  • the drive works on the coupling rod via the connecting shaft.
  • the connecting shaft can be formed directly from the drive shaft of the drive.
  • the connecting shaft is preferably a shaft which is separate from the drive and which can be designed as a plug-in shaft and, as it were, serves as a connecting piece between the drive shaft and the power transmission parts of the pump.
  • a connecting housing, in which the connecting shaft is arranged can be arranged between the pump housing (e.g. suction housing) and the drive.
  • Such a connection housing is also referred to in practice as a "lantern".
  • the drive can be designed as an electric motor drive or as a hydraulic drive.
  • WO 2010/012993 A2 already described the possibility of exposing the area of the rotor-side joint of the coupling rod in which the stator-side or rotor-side housing connector of the pump housing is designed to be removable.
  • a socket section of this housing socket can be detached from the pump housing and pushed onto the stator in an axial or axially parallel direction, so that the area of the coupling rod on the rotor side is exposed.
  • a housing part can also be formed from half-shells which are dismantled for the purpose of exposing a joint area.
  • JPH0777172A discloses an eccentric screw pump according to the preamble of claim 1.
  • the invention is based on the object of creating an eccentric screw pump of the type described at the beginning, which is simple in construction and is characterized by optimized maintenance and repair options.
  • the invention teaches in a generic eccentric screw pump of the type described at the outset that the rotor-side housing connector has a fixed first connector section and a displaceable second connector section, which to expose (and separate) the rotor-side connection area axially in the direction of the housing opening of the suction housing first nozzle section is slidable.
  • the invention is based on the knowledge that maintenance and repair options for an eccentric screw pump of the type described can be optimized if the possibility of simple dismantling or dismantling of the pump housing is made possible so that a corresponding connection area (e.g. a joint) can be exposed in the drive train.
  • a movable (second Nozzle section) of the pump housing is provided, which - not on the stator as in the prior art - but is pushed in the opposite direction onto the pump housing itself and consequently onto the first, fixed nozzle section of the pump housing. After appropriate separation of the drive train in this rotor-side connection area, e.g. B.
  • stator and / or the rotor can be removed and, if necessary, exchanged without the pump housing or suction housing itself having to be removed or further dismantled.
  • Such a rotor and / or stator exchange is consequently not hindered by the displaceable housing part.
  • this configuration has the advantage that a modular structure of the pump is optimized, since the design or dimensioning of the rotor / stator can be done independently of the design or dimensioning of the pump housing, since no part of the pump housing has to be pushed onto the rotor / stator Instead, the displaceable connector section is pushed in the opposite direction onto the fixed connector section of the pump housing in the direction of the center of the pump housing and consequently in the direction of the (central) housing opening of the pump housing.
  • the coupling rod is connected to the rotor in a known manner via a joint on the rotor side.
  • a separation point in the rotor or in the coupling rod
  • This separation point is preferably located on the other side of the joint, viewed from the (central) coupling rod.
  • Such a separation point has the advantage that a replacement of a wearing part, e.g. B. the Replacement of the rotor without loosening / separating the joint is possible. In such a case, it is expedient that this separation point can be exposed by moving the second, displaceable connecting piece section.
  • the described configuration of the rotor-side housing connector can optionally or additionally also be implemented in the area of the drive-side housing connector.
  • the invention therefore also relates to a generic eccentric screw pump in which the drive-side housing connector has a fixed first connector section and a displaceable second connector section which can be pushed axially in the direction of the housing opening of the pump housing onto the first connector section to expose the drive-side connection area.
  • the advantages described in connection with the rotor-side housing connector can therefore alternatively or additionally also be achieved in the area of the drive-side housing connector, so that in particular a joint provided on the drive side, which connects the connecting shaft and the coupling rod to one another, can be exposed.
  • the coupling rod can be separated from the connecting shaft or drive shaft, so that in particular an exchange of the connecting shaft (e.g. stub shaft) is subsequently possible without dismantling the suction housing or the drive as a whole. Rather, a locally very limited dismantling or opening of the pump housing in the area of the drive-side connection piece of the suction housing is sufficient.
  • the detachable connection area does not have, or not only, the dismountable drive-side joint, but also a separation point next to the joint, which enables the coupling rod to be separated from the connecting shaft / drive shaft without dismantling the drive-side joint.
  • Such a separation point can also be exposed very easily according to the invention by means of the displaceable second connecting piece section.
  • the configurations of the drive-side housing connector on the one hand and the rotor-side housing connector on the other hand can also be combined with one another.
  • the invention also includes embodiments in which only the rotor-side housing connector or only the drive-side housing connector are formed with the displaceable connector section.
  • the focus is on exposing a rotor-side connection area and / or a drive-side connection area. It can be, for. B. to the respective joint (z. B. pin joint, universal joint or the like) act itself. As described, however, alternative or additional separation points can also be provided.
  • the rotor is connected to the coupling rod or to the joint on the rotor side with the interposition of a rotor head which can be separated from the rotor.
  • Such a separation point in the area of the rotor has the advantage that the rotor-side joint itself does not have to be dismantled in order to exchange the rotor and / or the stator. Rather, a separation can take place at this additional separation point within the rotor.
  • the rotor itself is consequently extended by an additional, separate rotor head, whereby this rotor head can then contain in particular the one joint half of the rotor-side joint, so that the rotor head with its joint half can be connected to the coupling rod with the other joint half to form the rotor-side joint .
  • a separation of this joint is not necessary, but the separation takes place, as it were, within the rotor between the rotor or the rotor geometry and the rotor head.
  • the rotor head extends as an extension element in the assembled state through the second connecting piece section into the area of the first Nozzle section.
  • the joint on the rotor side is preferably arranged within the fixed first connecting piece section. With the help of the rotor head there is consequently an extension of the rotor and thus a bridging of the displaceable second connecting piece section.
  • the rotor is connected to the rotor head with the interposition of a removable spacer element, e.g. B. connected to a removable spacer sleeve.
  • the spacer sleeve can consist of two or more shell segments distributed over the circumference, e.g. B. be composed of half-shells.
  • the (non-rotatable) connection between rotor head and rotor can be made by means of screws and the spacer element can optionally be provided. However, it is also within the scope of the invention to produce the non-rotatable connection via the spacer element. As an alternative to a screw connection, bolt connections, half-shell connections or the like are also possible.
  • the additional rotor head described with a certain length also has the advantage that existing pump housings and existing coupling rods can be used.
  • the fixed first connector section is then part of the existing pump housing and the displaceable second connector section is mounted as an additional housing part.
  • the rotor is lengthened with the help of the additional rotor head, so that the area the additional displaceable nozzle section is bridged. This enables a modular structure or a modular use of the housing parts.
  • connection areas in the drive train are exposed.
  • the drive train consists of the drive, the drive shaft, possibly an additional separation point, the drive-side joint, the coupling rod, the rotor-side joint, the rotor head, possibly an additional separation point, and finally the rotor.
  • the connection area consequently in each case comprises at least the joint and possibly an additional separation point, the additional separation point starting from the (central) coupling rod being provided either on the joint or beyond the joint. This means that when the rotor / stator or the drive shaft or the mechanical seal is replaced, the entire coupling rod, including the joints, can remain in place. This shortens maintenance times compared to a variant in which the joints themselves have to be dismantled.
  • the (tubular) second connecting piece section and the (tubular) first connecting piece section are each at least partially cylindrical or essentially cylindrical. It is advantageous if the inner diameter of the displaceable second connecting piece section is (at least in some areas) greater than the outer diameter of the fixed first connecting piece section.
  • a suitable seal is provided between the first nozzle section and the second nozzle section, so that the pump housing (e.g. suction housing) is overall liquid-tight and pressure-tight. At least one seal is provided for this purpose.
  • the fixed first connecting piece section on the outer circumference with a circumferential seal e.g. B. be provided with an O-ring.
  • the displaceable second connecting piece section can be provided on the inner circumference with a circumferential seal, e.g. B. an O-ring.
  • the displaceable connecting piece section with suitable fastening means e.g. B. fastening screws on the first (fixed) nozzle section (releasably) is attached.
  • suitable fastening means e.g. B. fastening screws on the first (fixed) nozzle section (releasably)
  • the displaceable second connection section consists essentially of a (tubular) part which is pushed onto the fixed connection section.
  • the displaceable connector section itself is constructed in several parts and consists of at least two telescopically displaceable sleeves. The total length of the displaceable socket section is then distributed over the two telescopic sleeves in the assembled state and during dismantling the sleeves can be pushed over one another, so that overall only a shortened installation space and consequently a shortened, fixed first socket section need to be provided. This enables a particularly compact design of the pump housing.
  • the (elastomer) stator can be braced in an axially known manner with tie rods (or tie rods), e.g. B. between a first flange which is arranged on the side of the pump housing and a second flange which is on the opposite side of the pump housing, for. B. is arranged in the area of the pressure port.
  • tie rods or tie rods
  • these flanges have recesses so that the tie rods reach through the recesses in the flanges, and finally a bracing with suitable tensioning means, e.g. B. nuts or the like, which are arranged at the ends on the tie rods.
  • suitable tensioning means e.g. B. nuts or the like
  • the recesses in which the tie rods engage at least on one of the flanges as recesses open on the edge, e.g. B. long holes open at the edge are formed so that the tie rods can be dismantled in the radial direction in the region of this flange.
  • the tension rods can then be removed radially from the flange after loosening the tensioning screws / tension nuts, so that in particular a very space-saving expansion of the tension rods is made possible.
  • the rotor is designed to be hollow over at least part of its length, preferably over the entire length, e.g. B. is designed as a hollow rotor. This leads to a weight reduction and thus also to easier maintenance.
  • the eccentric screw pump according to the invention can preferably be used in mining or underground. In some cases, extreme conditions arise here with high demands on the maintainability of the pump. Maintenance work is often carried out in particularly close quarters.
  • the compact according to the invention and space-saving design and optimized dismantling options are consequently associated with particular advantages in this area of application. Typical maintenance work is changing wear parts, particularly the rotor and stator, but also the mechanical seal.
  • the subject of the invention is only the eccentric screw pump described, but also a rotor assembly for such an eccentric screw pump, such a rotor assembly, the rotor and the rotor head and optionally a spacer element, for. B. detected the spacer sleeve.
  • This rotor unit is also insulated and protected as a wear part and replacement part of such an eccentric screw pump.
  • the specific configuration can be implemented in the manner described.
  • the invention also relates to a pump system, e.g. B. for drainage in mining, mining, tunneling or the like, with at least one eccentric screw pump of the type described and with at least one tank, for. B. a drainage tank to which the eccentric screw pump is connected.
  • the pump is preferably connected to the outlet of such a drainage tank.
  • the figures show an eccentric screw pump which, in its basic structure, has a stator 1, a rotor 2 rotating in the stator 1 and a drive 3 for the rotor 2.
  • the eccentric screw pump has a (central) pump housing 4, which is also referred to as the suction housing.
  • the pump housing 4 is connected to the stator 1 on the suction side.
  • a further housing part is connected to the stator 1 as a connection stub, which is also referred to as a pressure stub 5.
  • the pump housing 4 has a housing opening 6 which, for. B. serves as an inlet opening for the medium to be conveyed, so that - depending on the operating direction - the medium z. B.
  • the drive 3 is equipped with an integrated drive shaft, not shown, which is connected to a connecting shaft 9.
  • This connecting shaft 9 is designed as a stub shaft in the exemplary embodiment.
  • the rotor 2 is connected to the connecting shaft 9 via a coupling rod 10, the coupling rod 10 being connected to the connecting shaft 9 via a drive-side joint 11 and to the rotor 2 via a rotor-side joint 12.
  • the connecting shaft 9 is sealed with a shaft seal 13.
  • This shaft seal 13 is z. B. designed as a mechanical seal.
  • connection housing 14 which is also referred to as a lantern, is arranged between the pump housing 4 and the drive 3. Such a connection housing 14 supports the pump housing 4 and the Drive 3 off. In this respect, the connection housing 14 can be attached to a base plate 15. The shaft seal 13 is connected to this connection housing 14.
  • the pump housing 4 has a tubular housing connector 16 on the drive side, to which the connecting housing 14 is connected, the drive-side joint 11 being arranged in this housing connector 16 on the drive side.
  • the pump housing 4 has a stator-side (tubular) housing stub 17 to which the stator 1 is connected, in this stator-side housing stub 17 z.
  • the stator-side joint or rotor-side joint 12 is arranged.
  • the coupling rod 10 is connected to the connecting shaft 9 via a detachable connection area on the drive side and detachably connected to the rotor 2 on the rotor side via a detachable connection area on the rotor side.
  • this releasable connection area is formed by the drive-side joint 11.
  • the possibly separable rotor-side joint 12 is provided on the rotor side.
  • a (further) separation point 20 is provided next to the joint 12, so that the rotor 2 can be separated from the coupling rod 10 by separating the separation point 20.
  • the rotor 2 is connected to the coupling rod 10 or to the joint 12 with the interposition of a separable rotor head 21.
  • the rotor head 21 consequently has a joint half of the joint 12 on the drive side. Is rotor side the rotor head 21 is detachably connected to the rotor 2. This will be discussed in the following.
  • the rotor-side housing connector 17 has a fixed first connector section 17a on the one hand and a displaceable second connector section 17b on the other hand.
  • the displaceable second connection section 17b can be pushed axially in the direction of the housing opening 6 of the pump housing 4 onto the first connection section 17a.
  • the displaceable second connector section 17b is tubular and, in the exemplary embodiment, essentially cylindrical, it can be pushed onto the fixed connector section 17a and the rotor-side connection area, namely the separation point 20, is thus exposed.
  • a separation between the rotor and the coupling rod can then take place without the coupling joint 12 itself having to be dismantled.
  • the rotor and stator can easily be exchanged after the housing part 17b has been pushed onto the housing part 17a and the separation point has been released.
  • the separation point 20 is integrated into the rotor 2, as it were, in that the rotor head 21 is detachably connected at the end to the rotor 2, forming the separation point 20.
  • the rotor head 21 has a certain length so that it serves as an extension of the rotor and thus also bridges the displaceable connecting piece portion 17b. This is because the coupling joint 12 is arranged within the fixed connector section 17a.
  • the rotor head 21 consequently extends through the first connection section 17b in the sense of an extension and extends into the second connection section 17a.
  • the rotor head 21 has one joint half of the coupling joint 12. The other half of the joint is part of the coupling rod 10.
  • the rotor head 21 has an end facing the rotor 2 Flange 32 which is screwed to rotor 2 by means of screws 33. It can be seen in the exemplary embodiment that this screw connection takes place with the interposition of a spacer element 22, this spacer element being designed as a (two-part) spacer sleeve 22.
  • This spacer sleeve 22, which can consist of two half-shells, can be removed after loosening the screws 33, so that a free space and thus a displacement path is created for the rotor 2 in the axial direction, which facilitates dismantling. This will be discussed in the following.
  • At least one seal 18 is provided between the first nozzle section 17a and the second nozzle section 17b, which seals the first nozzle section 17a against the second nozzle section 17b in a liquid-tight and pressure-tight manner, namely in the assembled state, which is shown in FIG Fig. 1 is shown.
  • the seal 18 is arranged on the outer circumference (for example in a groove) on the first connector section 17a or on an adapter piece 23 connected to it. Because in Fig. 1 it can be seen that an adapter piece 23 is connected to the fixed first connector section 17a, which has a flange 24 at the end. This adapter piece 23 carries the seal 18.
  • the displaceable connection piece 17b is fastened to this adapter piece 23 with fastening screws 25, ie it is connected to the flange 24 via the adapter piece 23 with the fastening screws 25.
  • the displaceable connecting piece 17b is fastened on the rotor side by means of fastening screws 26 to a flange 29 or adapter piece 27 on the stator side.
  • Fig. 1 it can be seen that in the case of the eccentric screw pump shown, the starting point is based on one known from the prior art Suction housing can be used, which already has the fixed connection section 17a and the displaceable connection section 17b is made available as it were as an additional component to form the suction housing 4 according to the invention.
  • stator 1 is braced with tension rods 28 in the axial direction between a first flange 29 and a second flange 30.
  • the first flange 29 is arranged on the side of the pump housing 4.
  • the second flange 30 is arranged on the side of the stator opposite the pump housing 4. It is part of the connection piece or pressure port 5.
  • the flanges 29, 30 have recesses 31 through which the tension rods 28 are passed. According to the invention, these recesses 31 are at least in the region of one of the flanges as recesses open on the edge, for. B. elongated holes so that the tie rods 28 can be dismantled in the radial direction in the region of this flange.
  • the tie rods 28 can be fixed or braced with nuts 28 '.
  • the dismantling of the rotor and / or stator takes place in the illustrated embodiment as follows: First, the fastening screws 25 and 26 of the displaceable connecting piece section 17b are loosened, so that the displaceable connecting piece section 17b can then be pushed in the direction of the arrow P onto the first connecting piece section 17a. As a result, the area of the separation point 20 is exposed. The screws 33 can then be loosened and the spacer sleeve 22 can then be removed (cf. Fig. 2 ). In this way, there is the axial free space already described between the rotor 2 and the rotor head 21, which is separated therefrom. The tension rods 28 can now be released and removed become.
  • the elastomeric stator 1 has an essentially constant wall thickness over its entire length or essentially over its entire length.
  • the stator casing 1 'shown made of metal.
  • the stator 1 is firmly connected to the jacket 1 ', e.g. B. vulcanized in this.
  • the pump shown can be the subject of a pumping system or a drainage system that z. B. can be used in mining, the subject of such a pump system are at least the pump shown and a drainage tank, not shown.
  • the rotor assembly which can consist of the rotor 2 with the rotor head 21 and the spacer sleeve 22, is of particular importance.
  • FIG Fig. 3 A second embodiment of the invention is shown in FIG Fig. 3 shown in detail.
  • This second aspect of the invention relates to the drive side of the pump housing.
  • the drive-side housing connector 16 here consists of a first, fixed connector section 16a and a second displaceable connector section 16b.
  • the second connector section 16b is axially displaceable in the illustrated embodiment. Axial displacement of the second connecting piece section 16b, the area of the drive-side joint 11 can be exposed and consequently made accessible.
  • the second connection section 16b is shifted axially in the direction of the first connection section 16a and consequently in the direction of the inlet opening 6 of the pump housing 4.
  • At least one seal 18 ' is provided between the first nozzle section 16a and the second nozzle section 16b.
  • the sleeve 19 of the drive-side joint 11 can then be removed and the joint can be dismantled.
  • the coupling rod 10 can then be moved away from the drive side 2 or pulled out together with the rotor 2 connected to it.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine Exzenterschneckenpumpe mit zumindest

  • einem Stator,
  • einem in dem Stator rotierenden Rotor,
  • einem Antrieb für den Rotor,
  • einem an den Stator angeschlossenen Pumpengehäuse (z. B. Sauggehäuse), welches zumindest eine Gehäuseöffnung (z. B. eine Einlassöffnung) für das zu fördernde Medium aufweist,
  • einer an den Antrieb angeschlossenen Verbindungswelle (z. B. Antriebswelle),
  • einer in dem Pumpengehäuse angeordneten Kuppelstange, die antriebsseitig über zumindest einen lösbaren antriebsseitigen Verbindungsbereich (trennbar) mit der Verbindungswelle und rotorseitig über zumindest einen lösbaren rotorseitigen Verbindungsbereich (trennbar) mit dem Rotor verbunden ist,
wobei das Sauggehäuse einen antriebsseigen Gehäusestutzen und einen statorseitigen Gehäusestutzen aufweist. Die Gehäuseöffnung (z. B. Einlassöffnung) ist bevorzugt zwischen dem antriebsseitigen Gehäusestutzen und dem statorseitigen Gehäusestutzen angeordnet, so dass diese beiden Gehäusestutzen beidseitig der Einlassöffnung bzw. Gehäuseöffnung angeordnet sind.The invention relates to an eccentric screw pump with at least
  • a stator,
  • a rotor rotating in the stator,
  • a drive for the rotor,
  • a pump housing (e.g. suction housing) connected to the stator, which has at least one housing opening (e.g. an inlet opening) for the medium to be conveyed,
  • a connecting shaft connected to the drive (e.g. drive shaft),
  • a coupling rod arranged in the pump housing, which is connected on the drive side to the connecting shaft via at least one detachable drive-side connection area (separable) and on the rotor side to the rotor via at least one detachable rotor-side connection area (separable),
wherein the suction housing has a drive-side housing connector and a stator-side housing connector. The housing opening (e.g. inlet opening) is preferably arranged between the drive-side housing connector and the stator-side housing connector, so that these two housing connectors are arranged on both sides of the inlet opening or housing opening.

Bei einer solchen Exzenterschneckenpumpe handelt es sich um eine Pumpe aus der Gruppe der rotierenden Verdrängerpumpen, die zur Förderung unterschiedlichster Medien und insbesondere flüssiger Medien und auch hochviskoser Flüssigkeiten in unterschiedlichsten Industriebereichen verwendet werden. Die zu fördernden Flüssigkeiten können dabei z. B. auch Feststoffanteile enthalten. Bevorzugt kommt die Pumpe im Bergbau, Grubenbau, Tunnelbau oder dergleichen zum Einsatz.Such an eccentric screw pump is a pump from the group of rotating displacement pumps, which are used to convey a wide variety of media and in particular liquid media and also highly viscous liquids in a wide variety of industrial sectors. The liquids to be conveyed can, for. B. also contain solids. The pump is preferably used in mining, mining, tunneling or the like.

Der Stator besteht aus z. B. elastischem Material und ist in der Regel von einem einteiligen oder mehrteiligen Statormantel bzw. Statorgehäuse (z. B. aus Metall) umgeben. Der elastomere Stator kann dabei fest mit dem Statormantel verbunden sein, z. B. in diesen einvulkanisiert sein. Die Erfindung umfasst aber auch Ausführungsformen, bei den der Stator lösbar und damit austauschbar von dem Statormantel ausgebildet ist. Alternativ werden aber auch Statoren aus anderem Material, z. B. aus Metall erfasst. Das Pumpengehäuse wird in der Praxis auch als Sauggehäuse bezeichnet. Auf der dem Sauggehäuse abgewandten Seite des Stators ist in der Regel ein Gehäuseteil vorgesehen, dass als Anschlussstutzen, z. B. als Druckstutzen bezeichnet wird, so dass der Druckstutzen z. B. druckseitig an den Stator angeschlossen sein kann. Grundsätzlich besteht auch die Möglichkeit, eine solche Pumpe in entgegengesetzter Förderrichtung zu betreiben, so dass das Pumpengehäuse (Sauggehäuse) dann druckseitig angeordnet wäre und der Anschlussstutzen (Druckstutzen) dann saugseitig angeordnet wäre.The stator consists of z. B. elastic material and is usually surrounded by a one-piece or multi-piece stator casing or stator housing (z. B. made of metal). The elastomeric stator can be firmly connected to the stator casing, for. B. be vulcanized into this. However, the invention also includes embodiments in which the stator is detachable and therefore replaceable from the stator casing. Alternatively, stators made of other material, e.g. B. captured from metal. In practice, the pump housing is also referred to as the suction housing. On the side of the stator facing away from the suction housing, a housing part is usually provided that, as a connecting piece, for. B. is referred to as a pressure port, so that the pressure port z. B. can be connected to the stator on the pressure side. In principle, there is also the possibility of operating such a pump in the opposite delivery direction, so that the pump housing (suction housing) would then be arranged on the pressure side and the connection nozzle (pressure nozzle) would then be arranged on the suction side.

Die rotierende und zugleich die Exzentrizität gewährleistende Verbindung zwischen dem Antrieb bzw. der Verbindungswelle einerseits und dem Rotor andererseits erfolgt über die im Pumpengehäuse angeordnete Kuppelstange. Über die Verbindungswelle arbeitet der Antrieb auf die Kuppelstange. Dabei kann die Verbindungswelle unmittelbar von der Antriebswelle des Antriebes gebildet werden. Bevorzugt handelt es sich bei der Verbindungswelle jedoch um eine von dem Antrieb separate Welle, die als Steckwelle ausgebildet sein kann und gleichsam als Verbindungsstück zwischen Antriebswelle und den Kraftübertragungsteilen der Pumpe dient. Zwischen dem Pumpengehäuse (z. B. Sauggehäuse) und dem Antrieb kann ein Verbindungsgehäuse angeordnet sein, in dem die Verbindungswelle angeordnet ist. Ein solches Verbindungsgehäuse wird in der Praxis auch als "Laterne" bezeichnet. Diese dient der "Aufnahme" bzw. Befestigung und Abstützung des Pumpengehäuses einerseits und des Antriebes andererseits, so dass dieses Verbindungsgehäuse bzw. die Laterne auf einer Grundplatte oder direkt auf ein Fundament befestigt wird und den Antrieb und das Pumpengehäuse abstützt bzw. trägt. Der Antrieb kann als elektromotorischer Antrieb oder als hydraulischer Antrieb ausgebildet sein.The rotating connection, which at the same time ensures eccentricity, between the drive or the connecting shaft, on the one hand, and the rotor, on the other hand, takes place via the coupling rod arranged in the pump housing. The drive works on the coupling rod via the connecting shaft. There the connecting shaft can be formed directly from the drive shaft of the drive. However, the connecting shaft is preferably a shaft which is separate from the drive and which can be designed as a plug-in shaft and, as it were, serves as a connecting piece between the drive shaft and the power transmission parts of the pump. A connecting housing, in which the connecting shaft is arranged, can be arranged between the pump housing (e.g. suction housing) and the drive. Such a connection housing is also referred to in practice as a "lantern". This serves to "accommodate" or attach and support the pump housing on the one hand and the drive on the other, so that this connection housing or the lantern is fastened on a base plate or directly on a foundation and supports or carries the drive and the pump housing. The drive can be designed as an electric motor drive or as a hydraulic drive.

Der Wartung und Instandsetzung einer Pumpe kommt in der Praxis besondere Bedeutung zu, zumal verschiedene Teile einem gegebenenfalls erheblichen Verschleiß unterliegen und daher als Verschleißteile gegebenenfalls ausgetauscht und ersetzt werden müssen. So kommt insbesondere dem Austausch des Stators und gegebenenfalls des Rotors besondere Bedeutung zu. Da der Rotor in der Regel über ein rotorseitiges Gelenk (z. B. Bolzengelenk oder Kardangelenk) mit der Kuppelstange verbunden ist, ist eine Zerlegung dieses Gelenkes im Zuge eines Austausches erforderlich, so dass die Zugänglichkeit des rotorseitigen Gelenkes von besonderer Bedeutung ist. Alternativ sind aus der Praxis aber auch zusätzliche Trennstellen neben dem Gelenk bekannt, die zum Zwecke des Rotoraustauschs ebenfalls zugänglich sein müssen.The maintenance and repair of a pump is of particular importance in practice, especially since various parts are subject to considerable wear and tear and therefore have to be exchanged and replaced as wearing parts. In particular, the replacement of the stator and possibly the rotor is of particular importance. Since the rotor is usually connected to the coupling rod via a joint on the rotor side (e.g. pin joint or universal joint), this joint must be dismantled in the course of an exchange, so that the accessibility of the joint on the rotor side is of particular importance. Alternatively, however, additional separation points besides the joint are also known from practice, which must also be accessible for the purpose of replacing the rotor.

Vor diesem Hintergrund wurde in der WO 2010/012993 A2 bereits die Möglichkeit beschrieben, den Bereich des rotorseitigen Gelenks der Kuppelstange freizulegen, in dem der statorseitige bzw. rotorseitige Gehäusestutzen des Pumpengehäuses demontierbar ausgestaltet wird. Dazu ist ein Stutzenabschnitt dieses Gehäusestutzens von dem Pumpengehäuse lösbar und in axialer bzw. achsparalleler Richtung auf den Stator aufschiebbar, so dass der rotorseitige Bereich der Kuppelstange freigelegt wird. Alternativ kann ein Gehäuseteil auch von Halbschalen gebildet werden, die zum Zwecke der Freilegung eines Gelenkbereichs zerlegt werden.With this in mind, the WO 2010/012993 A2 already described the possibility of exposing the area of the rotor-side joint of the coupling rod in which the stator-side or rotor-side housing connector of the pump housing is designed to be removable. For this purpose, a socket section of this housing socket can be detached from the pump housing and pushed onto the stator in an axial or axially parallel direction, so that the area of the coupling rod on the rotor side is exposed. Alternatively, a housing part can also be formed from half-shells which are dismantled for the purpose of exposing a joint area.

JPH0777172A offenbart eine Exzenterschneckenpumpe gemäß des Oberbegriffs des Anspruchs 1. Ausgehend von dem vorbekannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Exzenterschneckenpumpe der eingangs beschriebenen Art zu schaffen, die sich bei einfachem Aufbau durch optimierte Wartungs- und Instandhaltungsmöglichkeiten auszeichnet.JPH0777172A discloses an eccentric screw pump according to the preamble of claim 1. Starting from the known prior art, the invention is based on the object of creating an eccentric screw pump of the type described at the beginning, which is simple in construction and is characterized by optimized maintenance and repair options.

Zur Lösung dieser Aufgabe lehrt die Erfindung bei einer gattungsgemäßen Exzenterschneckenpumpe der eingangs beschriebenen Art, dass der rotorseitige Gehäusestutzen einen festen ersten Stutzenabschnitt und einen verschiebbaren zweiten Stutzenabschnitt aufweist, welcher zur Freilegung (und Trennung) des rotorseitigen Verbindungsbereichs axial in Richtung der Gehäuseöffnung des Sauggehäuses auf den ersten Stutzenabschnitt schiebbar ist.To solve this problem, the invention teaches in a generic eccentric screw pump of the type described at the outset that the rotor-side housing connector has a fixed first connector section and a displaceable second connector section, which to expose (and separate) the rotor-side connection area axially in the direction of the housing opening of the suction housing first nozzle section is slidable.

Die Erfindung geht dabei von der Erkenntnis aus, dass sich Wartungs- und Instandhaltungsmöglichkeiten einer Exzenterschneckenpumpe der beschriebenen Art optimieren lassen, wenn die Möglichkeit einer einfachen Demontage bzw. Zerlegung des Pumpengehäuses ermöglicht wird, so dass ein entsprechender Verbindungsbereich (z. B. ein Gelenk) im Antriebsstrang freigelegt werden kann. Erfindungsgemäß ist dazu ein verschiebbarer (zweiter Stutzenabschnitt) des Pumpengehäuses vorgesehen, welcher - nicht wie beim Stand der Technik auf den Stator - sondern in der entgegengesetzten Richtung auf das Pumpengehäuses selbst und folglich auf den ersten, festen Stutzenabschnitt des Pumpengehäuses aufgeschoben wird. Nach entsprechender Trennung des Antriebsstrangs in diesem rotorseitigen Verbindungsbereich, z. B. nach Trennung des rotorseitigen Gelenkes lassen sich der Stator und/oder der Rotor entfernen und gegebenenfalls austauschen, ohne dass das Pumpengehäuse bzw. Sauggehäuse selbst entfernt oder weiter demontiert werden muss. Ein solcher Rotor und/oder Statoraustausch wird folglich durch das verschiebbare Gehäuseteil nicht behindert. Außerdem hat diese Ausgestaltung den Vorteil, dass ein modularer Aufbau der Pumpe optimiert wird, da Design bzw. Dimensionierung von Rotor/Stator unabhängig von dem Design bzw. Dimensionierung des Pumpengehäuses erfolgen können, da kein Teil des Pumpengehäuses auf den Rotor/Stator aufgeschoben werden muss, sondern es erfolgt in entgegengesetzter Richtung ein Aufschieben des verschiebbaren Stutzenabschnittes auf den festen Stutzenabschnitt des Pumpengehäuses in Richtung zur Mitte des Pumpengehäuses hin und folglich in Richtung zu der (zentralen) Gehäuseöffnung des Pumpengehäuses.The invention is based on the knowledge that maintenance and repair options for an eccentric screw pump of the type described can be optimized if the possibility of simple dismantling or dismantling of the pump housing is made possible so that a corresponding connection area (e.g. a joint) can be exposed in the drive train. According to the invention, a movable (second Nozzle section) of the pump housing is provided, which - not on the stator as in the prior art - but is pushed in the opposite direction onto the pump housing itself and consequently onto the first, fixed nozzle section of the pump housing. After appropriate separation of the drive train in this rotor-side connection area, e.g. B. after separating the joint on the rotor side, the stator and / or the rotor can be removed and, if necessary, exchanged without the pump housing or suction housing itself having to be removed or further dismantled. Such a rotor and / or stator exchange is consequently not hindered by the displaceable housing part. In addition, this configuration has the advantage that a modular structure of the pump is optimized, since the design or dimensioning of the rotor / stator can be done independently of the design or dimensioning of the pump housing, since no part of the pump housing has to be pushed onto the rotor / stator Instead, the displaceable connector section is pushed in the opposite direction onto the fixed connector section of the pump housing in the direction of the center of the pump housing and consequently in the direction of the (central) housing opening of the pump housing.

Dabei ist die Kuppelstange in bekannter Weise über ein rotorseitiges Gelenk mit dem Rotor verbunden. Das bedeutet, dass der lösbare Verbindungsbereich, der über die Verschiebung des Stutzenabschnittes zugänglich wird, von diesem trennbaren rotorseitigen Gelenk gebildet wird. Neben dem rotorseitigen Gelenk ist eine Trennstelle (im Rotor oder in der Kuppelstange) vorgesehen, so dass eine Trennung des Antriebsstrangs unabhängig von dem rotorseitigen Gelenk erfolgen kann. Diese Trennstelle befindet sich von der (zentralen) Kuppelstange aus gesehen bevorzugt jenseits des Gelenkes. Eine solche Trennstelle hat den Vorteil, dass ein Austausch eines Verschleißteils, z. B. der Austausch des Rotors ohne Lösen / Trennen des Gelenkes möglich ist. In einem solchen Fall ist es zweckmäßig, dass durch Verschieben des zweiten, verschiebbaren Stutzenabschnittes diese Trennstelle freilegbar ist.The coupling rod is connected to the rotor in a known manner via a joint on the rotor side. This means that the releasable connection area, which is accessible via the displacement of the connecting piece section, is formed by this separable joint on the rotor side. In addition to the joint on the rotor side, a separation point (in the rotor or in the coupling rod) is provided so that the drive train can be separated independently of the joint on the rotor side. This separation point is preferably located on the other side of the joint, viewed from the (central) coupling rod. Such a separation point has the advantage that a replacement of a wearing part, e.g. B. the Replacement of the rotor without loosening / separating the joint is possible. In such a case, it is expedient that this separation point can be exposed by moving the second, displaceable connecting piece section.

Die beschriebene Ausgestaltung des rotorseitigen Gehäusestutzens lässt sich optional oder ergänzend auch im Bereich des antriebsseitigen Gehäusestutzens realisieren. Die Erfindung betrifft daher auch eine gattungsgemäße Exzenterschneckenpumpe, bei welcher der antriebsseitige Gehäusestutzen einen festen ersten Stutzenabschnitt und einen verschiebbaren zweiten Stutzenabschnitt aufweist, welcher zur Freilegung des antriebsseitigen Verbindungsbereichs axial in Richtung der Gehäuseöffnung des Pumpengehäuses auf den ersten Stutzenabschnitt schiebbar ist. Die in dem Zusammenhang mit dem rotorseitigen Gehäusestutzen beschriebenen Vorteile lassen sich folglich alternativ oder ergänzend auch im Bereich des antriebsseitigen Gehäusestutzens erzielen, so dass insbesondere ein antriebsseitig vorgesehenes Gelenk, welches die Verbindungswelle und die Kuppelstange miteinander verbindet, freilegbar ist. Auf diese Weise lässt sich die Kuppelstange von der Verbindungswelle bzw. Antriebswelle trennen, so dass anschließend insbesondere ein Austausch der Verbindungswelle (z. B. Steckwelle) möglich ist, und zwar ohne das Sauggehäuse oder den Antrieb insgesamt zu demontieren. Vielmehr reicht eine lokal sehr begrenzte Demontage bzw. Öffnung des Pumpengehäuses im Bereich des antriebsseitigen Anschlussstutzens des Sauggehäuses. Auch antriebsseitig besteht die Möglichkeit, dass der lösbare Verbindungsbereich nicht oder nicht nur das zerlegbare antriebsseitige Gelenk, sondern zusätzlich neben dem Gelenk eine Trennstelle aufweist, die eine Trennung der Kuppelstange von der Verbindungswelle/Antriebswelle ohne Zerlegung des antriebsseitigen Gelenks ermöglicht. Auch eine solche Trennstelle lässt sich erfindungsgemäß durch den verschiebbaren zweiten Stutzenabschnitt sehr einfach freilegen.The described configuration of the rotor-side housing connector can optionally or additionally also be implemented in the area of the drive-side housing connector. The invention therefore also relates to a generic eccentric screw pump in which the drive-side housing connector has a fixed first connector section and a displaceable second connector section which can be pushed axially in the direction of the housing opening of the pump housing onto the first connector section to expose the drive-side connection area. The advantages described in connection with the rotor-side housing connector can therefore alternatively or additionally also be achieved in the area of the drive-side housing connector, so that in particular a joint provided on the drive side, which connects the connecting shaft and the coupling rod to one another, can be exposed. In this way, the coupling rod can be separated from the connecting shaft or drive shaft, so that in particular an exchange of the connecting shaft (e.g. stub shaft) is subsequently possible without dismantling the suction housing or the drive as a whole. Rather, a locally very limited dismantling or opening of the pump housing in the area of the drive-side connection piece of the suction housing is sufficient. On the drive side, there is also the possibility that the detachable connection area does not have, or not only, the dismountable drive-side joint, but also a separation point next to the joint, which enables the coupling rod to be separated from the connecting shaft / drive shaft without dismantling the drive-side joint. Such a separation point can also be exposed very easily according to the invention by means of the displaceable second connecting piece section.

Optional lassen sich die Ausgestaltungen des antriebsseitigen Gehäusestutzens einerseits und des rotorseitigen Gehäusestutzens andererseits auch miteinander kombinieren. Die Erfindung umfasst aber auch Ausführungsformen, bei den lediglich der rotorseitige Gehäusestutzen oder lediglich der antriebsseitige Gehäusestutzen mit dem verschiebbaren Stutzenabschnitt ausgebildet sind.Optionally, the configurations of the drive-side housing connector on the one hand and the rotor-side housing connector on the other hand can also be combined with one another. However, the invention also includes embodiments in which only the rotor-side housing connector or only the drive-side housing connector are formed with the displaceable connector section.

Im Vordergrund steht die Freilegung eines rotorseitigen Verbindungsbereichs und/oder eines antriebsseitigen Verbindungsbereichs. Dabei kann es sich z. B. um das jeweilige Gelenk (z. B. Bolzengelenk, Kardangelenk oder dergleichen) selbst handeln. Wie beschrieben, können jedoch auch alternative oder zusätzliche Trennstellen vorgesehen sein. Gemäß der Erfindung, ist der Rotor unter Zwischenschaltung eines von dem Rotor trennbaren Rotorkopfes mit der Kuppelstange oder mit dem rotorseitigen Gelenk verbunden. Eine solche Trennstelle im Bereich des Rotors hat den Vorteil, dass das rotorseitige Gelenk selbst nicht zerlegt werden muss, um den Rotor und/oder den Stator auszutauschen. Vielmehr kann eine Trennung an dieser zusätzlichen Trennstelle innerhalb des Rotors erfolgen. Der Rotor selbst wird folglich um einen zusätzlichen, separaten Rotorkopf verlängert, wobei dieser Rotorkopf dann insbesondere die eine Gelenkhälfte des rotorseitigen Gelenkes enthalten kann, so dass sich der Rotorkopf mit seiner Gelenkhälfte mit der Kuppelstange mit der anderen Gelenkhälfte unter Bildung des rotorseitigen Gelenkes miteinander verbinden lässt. Im Zuge des Austausches des Rotors ist dann jedoch nicht eine Trennung dieses Gelenkes erforderlich, sondern die Trennung erfolgt gleichsam innerhalb des Rotors zwischen dem Rotor bzw. der Rotorgeometrie und dem Rotorkopf. Der Rotorkopf erstreckt sich dabei als Verlängerungselement im montierten Zustand durch den zweiten Stutzenabschnitt bis in den Bereich des ersten Stutzenabschnittes. Das rotorseitige Gelenk ist bevorzugt innerhalb des festen ersten Stutzenabschnittes angeordnet. Mit Hilfe des Rotorkopfes erfolgt folglich eine Verlängerung des Rotors und damit eine Überbrückung des verschiebbaren zweiten Stutzenabschnittes.The focus is on exposing a rotor-side connection area and / or a drive-side connection area. It can be, for. B. to the respective joint (z. B. pin joint, universal joint or the like) act itself. As described, however, alternative or additional separation points can also be provided. According to the invention, the rotor is connected to the coupling rod or to the joint on the rotor side with the interposition of a rotor head which can be separated from the rotor. Such a separation point in the area of the rotor has the advantage that the rotor-side joint itself does not have to be dismantled in order to exchange the rotor and / or the stator. Rather, a separation can take place at this additional separation point within the rotor. The rotor itself is consequently extended by an additional, separate rotor head, whereby this rotor head can then contain in particular the one joint half of the rotor-side joint, so that the rotor head with its joint half can be connected to the coupling rod with the other joint half to form the rotor-side joint . In the course of the replacement of the rotor, however, a separation of this joint is not necessary, but the separation takes place, as it were, within the rotor between the rotor or the rotor geometry and the rotor head. The rotor head extends as an extension element in the assembled state through the second connecting piece section into the area of the first Nozzle section. The joint on the rotor side is preferably arranged within the fixed first connecting piece section. With the help of the rotor head there is consequently an extension of the rotor and thus a bridging of the displaceable second connecting piece section.

Gemäß der Erfindung, ist der Rotor mit dem Rotorkopf unter Zwischenschaltung eines entfernbaren Distanzelementes, z. B. einer entfernbaren Distanzhülse verbunden. Die Distanzhülse kann aus zwei oder mehr über den Umfang verteilten Schalensegmenten, z. B. Halbschalen zusammengesetzt sein. Nach dem Lösen der Verbindung im Bereich der Trennstelle zwischen Rotorkopf und Rotor lässt sich dann ein solches Distanzelement entfernen, so dass in axialer Richtung Platz (für eine Demontage) geschaffen wird. Damit lässt sich dann der Rotor bzw. die Rotor/Statorkombination in axialer Richtung in die antriebsseitige Richtung verschieben und der Rotor und/oder Stator austauschen.According to the invention, the rotor is connected to the rotor head with the interposition of a removable spacer element, e.g. B. connected to a removable spacer sleeve. The spacer sleeve can consist of two or more shell segments distributed over the circumference, e.g. B. be composed of half-shells. After releasing the connection in the area of the separation point between rotor head and rotor, such a spacer element can then be removed so that space is created in the axial direction (for dismantling). The rotor or the rotor / stator combination can then be displaced in the axial direction in the drive-side direction and the rotor and / or stator can be exchanged.

Die (drehfeste) Verbindung zwischen Rotorkopf und Rotor kann dabei mittels Schrauben erfolgen und zusätzlich kann optional das Distanzelement vorgesehen sein. Es liegt jedoch auch im Rahmen der Erfindung, die drehfeste Verbindung über das Distanzelement herzustellen. Alternativ zu einer Schraubenverbindung sind auch Bolzenverbindungen, Halbschalenverbindungen oder dergleichen möglich.The (non-rotatable) connection between rotor head and rotor can be made by means of screws and the spacer element can optionally be provided. However, it is also within the scope of the invention to produce the non-rotatable connection via the spacer element. As an alternative to a screw connection, bolt connections, half-shell connections or the like are also possible.

Der beschriebene zusätzliche Rotorkopf mit einer gewissen Länge hat auch den Vorteil, dass auf vorhandene Pumpengehäuse und vorhandene Kuppelstangen zurückgegriffen werden kann. Der feste erste Stutzenabschnitt ist dann Bestandteil des vorhandenen Pumpengehäuses und der verschiebbare zweite Stutzenabschnitt wird als zusätzliches Gehäuseteil montiert. Der Rotor wird mit Hilfe des zusätzlichen Rotorkopfes gleichsam verlängert, so dass der Bereich des zusätzlichen verschiebbaren Stutzenabschnittes überbrückt wird. Somit wird ein modularer Aufbau bzw. ein modularer Einsatz der Gehäuseteile ermöglicht.The additional rotor head described with a certain length also has the advantage that existing pump housings and existing coupling rods can be used. The fixed first connector section is then part of the existing pump housing and the displaceable second connector section is mounted as an additional housing part. The rotor is lengthened with the help of the additional rotor head, so that the area the additional displaceable nozzle section is bridged. This enables a modular structure or a modular use of the housing parts.

Insgesamt gelingt im Rahmen der Erfindung eine Freilegung entsprechender Verbindungsbereiche im Antriebsstrang. Der Antriebsstrang besteht dabei ausgehend vom Antrieb aus, aus der Antriebswelle, gegebenenfalls einer zusätzlichen Trennstelle, dem antriebsseitigen Gelenk, der Kuppelstange, dem rotorseitigen Gelenk, dem Rotorkopf, gegebenenfalls einer zusätzlichen Trennstelle und schließlich dem Rotor. Der Verbindungsbereich umfasst folglich jeweils zumindest das Gelenk und gegebenenfalls eine zusätzliche Trennstelle, wobei die zusätzliche Trennstelle ausgehend von der (zentralen) Kuppelstange aus entweder am Gelenk oder jenseits des Gelenkes vorgesehen ist. Somit kann bei einem Tausch von Rotor/Stator oder der Antriebswelle bzw. der Gleitringdichtung die gesamte Kuppelstange mitsamt der Gelenke vor Ort verbleiben. Dadurch werden Wartungszeiten gegenüber einer Variante, bei der die Gelenke selbst demontiert werden müssen, verkürzt.Overall, within the scope of the invention, corresponding connection areas in the drive train are exposed. The drive train consists of the drive, the drive shaft, possibly an additional separation point, the drive-side joint, the coupling rod, the rotor-side joint, the rotor head, possibly an additional separation point, and finally the rotor. The connection area consequently in each case comprises at least the joint and possibly an additional separation point, the additional separation point starting from the (central) coupling rod being provided either on the joint or beyond the joint. This means that when the rotor / stator or the drive shaft or the mechanical seal is replaced, the entire coupling rod, including the joints, can remain in place. This shortens maintenance times compared to a variant in which the joints themselves have to be dismantled.

Bevorzugt ist vorgesehen, dass der (rohrförmige) zweite Stutzenabschnitt und der (rohrförmige) erste Stutzenabschnitt jeweils zumindest bereichsweise zylindrisch oder im Wesentlichen zylindrisch ausgebildet sind. Dabei ist es vorteilhaft, wenn der Innendurchmesser des verschiebbaren zweiten Stutzenabschnittes (zumindest bereichsweise) größer als der Außendurchmesser des festen ersten Stutzenabschnittes ist. Im montierten Zustand ist selbstverständlich eine geeignete Abdichtung zwischen dem ersten Stutzenabschnitt und dem zweiten Stutzenabschnitt vorgesehen, so dass das Pumpengehäuse (z. B. Sauggehäuse) insgesamt flüssigkeitsdicht und druckdicht ausgebildet ist. Dazu ist zumindest eine Dichtung vorgesehen. So kann der feste erste Stutzenabschnitt außenumfangsseitig mit einer umlaufenden Dichtung, z. B. mit einem O-Ring, versehen sein. Alternativ oder ergänzend kann der verschiebbare zweite Stutzenabschnitt innenumfangsseitig mit einer umlaufenden Dichtung, z. B. einem O-Ring, versehen sein. Es versteht sich, dass das jeweils gegenüberliegende Teil gegebenenfalls entsprechende Dichtflächen aufweist, gegen welche die Dichtung anliegt.It is preferably provided that the (tubular) second connecting piece section and the (tubular) first connecting piece section are each at least partially cylindrical or essentially cylindrical. It is advantageous if the inner diameter of the displaceable second connecting piece section is (at least in some areas) greater than the outer diameter of the fixed first connecting piece section. In the assembled state, of course, a suitable seal is provided between the first nozzle section and the second nozzle section, so that the pump housing (e.g. suction housing) is overall liquid-tight and pressure-tight. At least one seal is provided for this purpose. Thus, the fixed first connecting piece section on the outer circumference with a circumferential seal, e.g. B. be provided with an O-ring. Alternatively or additionally, the displaceable second connecting piece section can be provided on the inner circumference with a circumferential seal, e.g. B. an O-ring. It goes without saying that the respectively opposite part may have corresponding sealing surfaces against which the seal rests.

Im Übrigen ist vorgesehen, dass der verschiebbare Stutzenabschnitt mit geeigneten Befestigungsmitteln, z. B. Befestigungsschrauben an dem ersten (festen) Stutzenabschnitt (lösbar) befestigt wird. Im Betrieb wird folglich für eine geeignete Fixierung zwischen den beiden Stutzenabschnitten gesorgt.In addition, it is provided that the displaceable connecting piece section with suitable fastening means, e.g. B. fastening screws on the first (fixed) nozzle section (releasably) is attached. In operation, a suitable fixation between the two nozzle sections is consequently ensured.

In einer ersten Ausführungsform besteht der verschiebbare zweite Stutzenabschnitt aus im Wesentlichen einem (rohrförmigen) Teil, welches auf den festen Stutzenabschnitt aufgeschoben wird. In einer alternativen Weiterbildung besteht die Möglichkeit, dass der verschiebbare Stutzenabschnitt selbst mehrteilig ausgebildet ist und aus zumindest zwei teleskopierend verschiebbaren Hülsen besteht. Die Gesamtlänge des verschiebbaren Stutzenabschnittes verteilt sich dann auf im montierten Zustand auf die beiden teleskopierenden Hülsen und im Zuge der Demontage lassen sich die Hülsen übereinander schieben, so dass insgesamt lediglich ein verkürzter Bauraum und folglich ein verkürzter fester erster Stutzenabschnitt vorgesehen sein müssen. Damit wird eine besonders kompakte Bauform des Pumpengehäuses ermöglicht.In a first embodiment, the displaceable second connection section consists essentially of a (tubular) part which is pushed onto the fixed connection section. In an alternative further development, there is the possibility that the displaceable connector section itself is constructed in several parts and consists of at least two telescopically displaceable sleeves. The total length of the displaceable socket section is then distributed over the two telescopic sleeves in the assembled state and during dismantling the sleeves can be pushed over one another, so that overall only a shortened installation space and consequently a shortened, fixed first socket section need to be provided. This enables a particularly compact design of the pump housing.

Der (elastomere) Stator lässt sich in grundsätzlich bekannter Weise mit Spannstangen (bzw. Zugankern) in axialer Richtung verspannen, z. B. zwischen einem ersten Flansch, der auf der Seite des Pumpengehäuses angeordnet ist und einem zweiten Flansch, der auf der dem Pumpengehäuse gegenüberliegenden Seite, z. B. im Bereich des Druckstutzens angeordnet ist.The (elastomer) stator can be braced in an axially known manner with tie rods (or tie rods), e.g. B. between a first flange which is arranged on the side of the pump housing and a second flange which is on the opposite side of the pump housing, for. B. is arranged in the area of the pressure port.

Dazu weisen diese Flansche Ausnehmungen auf, so dass die Spannstangen die Ausnehmungen in den Flanschen durchgreifen, wobei schließlich eine Verspannung mit geeigneten Spannmitteln, z. B. Muttern oder dergleichen erfolgen kann, die endseitig an den Spannstangen angeordnet sind. Nach einem weiteren Aspekt der Erfindung ist nun optional vorgesehen, dass die Ausnehmungen, in welche die Spannstangen eingreifen, zumindest an einem der Flansche als randseitig offene Ausnehmungen, z. B. randseitig offene Langlöcher ausgebildet sind, so dass die Spannstangen im Bereich dieses Flansches in radialer Richtung demontierbar sind. Die Spannstangen können dann nach dem Lösen der Spannschrauben/Spannmuttern radial aus dem Flansch entfernt werden, so dass insbesondere ein sehr platzsparender Ausbau der Spannstangen ermöglicht wird.For this purpose, these flanges have recesses so that the tie rods reach through the recesses in the flanges, and finally a bracing with suitable tensioning means, e.g. B. nuts or the like, which are arranged at the ends on the tie rods. According to a further aspect of the invention, it is now optionally provided that the recesses in which the tie rods engage, at least on one of the flanges as recesses open on the edge, e.g. B. long holes open at the edge are formed so that the tie rods can be dismantled in the radial direction in the region of this flange. The tension rods can then be removed radially from the flange after loosening the tensioning screws / tension nuts, so that in particular a very space-saving expansion of the tension rods is made possible.

Optional ist vorsehen, dass der (elastomere) Stator über seine gesamte Länge oder im Wesentlichen konstante Wandstärke aufweist. Gleiches kann für den Statormantel bzw. Statorgehäuse gelten. Ein solcher Stator mit gleichmäßiger Wandstärke hat gegenüber herkömmlichen Rohrstatoren bei gleichen Druckbedingungen den Vorteil einer Längen- und Gewichtsreduktion und damit den Vorteil einer einfacheren Wartung.Provision is optionally made for the (elastomeric) stator to have a wall thickness that is essentially constant over its entire length. The same can apply to the stator casing or stator housing. Such a stator with a uniform wall thickness has the advantage of a length and weight reduction and thus the advantage of easier maintenance compared to conventional tubular stators under the same pressure conditions.

Ferner ist bevorzugt vorgesehen, dass der Rotor zumindest über einen Teil seiner Länge, vorzugsweise über die gesamte Länge, hohl ausgebildet ist, z. B. als hohlgebohrter Rotor ausgebildet ist. Dieses führt zu einer Gewichtsreduktion und damit ebenfalls zu einer einfacheren Wartung.Furthermore, it is preferably provided that the rotor is designed to be hollow over at least part of its length, preferably over the entire length, e.g. B. is designed as a hollow rotor. This leads to a weight reduction and thus also to easier maintenance.

Die erfindungsgemäße Exzenterschneckenpumpe lässt sich bevorzugt im Bergbau bzw. unter Tage einsetzen. Hier treten zum Teil extreme Bedingungen mit hohen Anforderungen an die Wartbarkeit der Pumpe auf. So erfolgen Wartungsarbeiten häufig in besonderer Enge. Die erfindungsgemäß kompakte und platzsparende Bauweise und optimierte Demontagemöglichkeiten sind folglich in diesem Einsatzbereich mit besonderen Vorteilen verbunden. Typische Wartungsarbeiten sind dabei der Wechsel von Verschleißteilen, insbesondere Rotor und Stator, aber auch der Gleitringdichtung.The eccentric screw pump according to the invention can preferably be used in mining or underground. In some cases, extreme conditions arise here with high demands on the maintainability of the pump. Maintenance work is often carried out in particularly close quarters. The compact according to the invention and space-saving design and optimized dismantling options are consequently associated with particular advantages in this area of application. Typical maintenance work is changing wear parts, particularly the rotor and stator, but also the mechanical seal.

Gegenstand der Erfindung ist nur die beschriebene Exzenterschneckenpumpe, sondern auch ein Rotoraggregat für eine solche Exzenterschneckenpumpe, wobei ein solches Rotoraggregat den Rotor und dem Rotorkopf sowie gegebenenfalls ein Distanzelement, z. B. die Distanzhülse erfasst. Dieses Rotoraggregat wird als Verschleißteil und Ersatzteil einer solchen Exzenterschneckenpumpe auch isoliert unter Schutz gestellt. Die konkrete Ausgestaltung kann in der beschriebenen Weise realisiert werden.The subject of the invention is only the eccentric screw pump described, but also a rotor assembly for such an eccentric screw pump, such a rotor assembly, the rotor and the rotor head and optionally a spacer element, for. B. detected the spacer sleeve. This rotor unit is also insulated and protected as a wear part and replacement part of such an eccentric screw pump. The specific configuration can be implemented in the manner described.

Ferner betrifft die Erfindung ein Pumpensystem, z. B. für eine Entwässerung im Bergbau, Grubenbau, Tunnelbau oder dergleichen, mit zumindest einer Exzenterschneckenpumpe der beschriebenen Art und mit zumindest einem Tank, z. B. einem Entwässerungstank, an dem die Exzenterschneckenpumpe angeschlossen ist. Bevorzugt ist die Pumpe an den Ausgang eines solchen Entwässerungstanks angeschlossen.The invention also relates to a pump system, e.g. B. for drainage in mining, mining, tunneling or the like, with at least one eccentric screw pump of the type described and with at least one tank, for. B. a drainage tank to which the eccentric screw pump is connected. The pump is preferably connected to the outlet of such a drainage tank.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen

Fig. 1
eine erfindungsgemäße Exzenterschneckenpumpe in einem (teilweisen) Vertikalschnitt,
Fig. 2
einen Ausschnitt aus Fig. 1 in einer anderen Ansicht und
Fig. 3
einen Ausschnitt aus einer abgewandelten Ausführungsform des Gegenstandes nach Fig. 1.
The invention is explained below with the aid of a drawing showing only one exemplary embodiment. Show it
Fig. 1
an eccentric screw pump according to the invention in a (partial) vertical section,
Fig. 2
a section Fig. 1 in another view and
Fig. 3
a section of a modified embodiment of the object according to Fig. 1 .

In den Figuren ist eine Exzenterschneckenpumpe dargestellt, die in ihrem grundsätzlichen Aufbau einen Stator 1, einen in dem Stator 1 rotierenden Rotor 2 und einen Antrieb 3 für den Rotor 2 aufweist. Die Exzenterschneckenpumpe weist ein (zentrales) Pumpengehäuse 4 auf, das auch als Sauggehäuse bezeichnet wird. In diesem Fall ist das Pumpengehäuse 4 saugseitig an den Stator 1 angeschlossen. Auf der gegenüberliegenden Seite des Pumpengehäuses 4 ist an den Stator 1 ein weiteres Gehäuseteil als Anschlussstutzen angeschlossen, das auch als Druckstutzen 5 bezeichnet wird. Das Pumpengehäuse 4 weist eine Gehäuseöffnung 6 auf, die z. B. als Einlassöffnung für das zu fördernde Medium dient, so dass - je nach Betriebsrichtung - das Medium z. B. von dem Pumpengehäuse 4 über den Stator/Rotor zu dem Druckstutzen 5 gefördert wird. Der Antrieb 3 ist dabei mit einer nicht dargestellten integrierten Antriebswelle ausgerüstet, die an eine Verbindungswelle 9 angeschlossen ist. Diese Verbindungswelle 9 ist im Ausführungsbeispiel als Steckwelle ausgebildet. Der Rotor 2 ist über eine Kuppelstange 10 mit der Verbindungswelle 9 verbunden, wobei die Kuppelstange 10 über ein antriebsseitiges Gelenk 11 mit der Verbindungswelle 9 und über ein rotorseitiges Gelenk 12 mit dem Rotor 2 verbunden ist. Zur flüssigkeitsdichten Trennung des Pumpengehäuses gegen die Umgebung bzw. gegen den Antrieb ist die Verbindungswelle 9 mit einer Wellenabdichtung 13 abgedichtet. Diese Wellenabdichtung 13 ist z. B. als Gleitringdichtung ausgebildet.The figures show an eccentric screw pump which, in its basic structure, has a stator 1, a rotor 2 rotating in the stator 1 and a drive 3 for the rotor 2. The eccentric screw pump has a (central) pump housing 4, which is also referred to as the suction housing. In this case, the pump housing 4 is connected to the stator 1 on the suction side. On the opposite side of the pump housing 4, a further housing part is connected to the stator 1 as a connection stub, which is also referred to as a pressure stub 5. The pump housing 4 has a housing opening 6 which, for. B. serves as an inlet opening for the medium to be conveyed, so that - depending on the operating direction - the medium z. B. is conveyed from the pump housing 4 via the stator / rotor to the pressure port 5. The drive 3 is equipped with an integrated drive shaft, not shown, which is connected to a connecting shaft 9. This connecting shaft 9 is designed as a stub shaft in the exemplary embodiment. The rotor 2 is connected to the connecting shaft 9 via a coupling rod 10, the coupling rod 10 being connected to the connecting shaft 9 via a drive-side joint 11 and to the rotor 2 via a rotor-side joint 12. For the liquid-tight separation of the pump housing from the environment or from the drive, the connecting shaft 9 is sealed with a shaft seal 13. This shaft seal 13 is z. B. designed as a mechanical seal.

Zwischen dem Pumpengehäuse 4 und dem Antrieb 3 ist ein Verbindungsgehäuse 14 angeordnet, dass auch als Laterne bezeichnet wird. Ein solches Verbindungsgehäuse 14 stützt das Pumpengehäuse 4 und den Antrieb 3 ab. Insofern kann das Verbindungsgehäuse 14 an einer Grundplatte 15 befestigt sein. Die Wellenabdichtung 13 ist an dieses Verbindungsgehäuse 14 angeschlossen.A connection housing 14, which is also referred to as a lantern, is arranged between the pump housing 4 and the drive 3. Such a connection housing 14 supports the pump housing 4 and the Drive 3 off. In this respect, the connection housing 14 can be attached to a base plate 15. The shaft seal 13 is connected to this connection housing 14.

Das Pumpengehäuse 4 weist einen antriebsseitigen rohrförmigen Gehäusestutzen 16 auf, an den das Verbindungsgehäuse 14 angeschlossen ist, wobei in diesem antriebsseitigen Gehäusestutzen 16 das antriebsseitige Gelenk 11 angeordnet ist.The pump housing 4 has a tubular housing connector 16 on the drive side, to which the connecting housing 14 is connected, the drive-side joint 11 being arranged in this housing connector 16 on the drive side.

Außerdem weist das Pumpengehäuse 4 einen statorseitigen (rohrförmigen) Gehäusestutzen 17 auf, an den der Stator 1 angeschlossen ist, wobei in diesem statorseitigen Gehäusestutzen 17 z. B. das statorseitige Gelenk bzw. rotorseitige Gelenk 12 angeordnet ist.In addition, the pump housing 4 has a stator-side (tubular) housing stub 17 to which the stator 1 is connected, in this stator-side housing stub 17 z. B. the stator-side joint or rotor-side joint 12 is arranged.

Dabei ist die Kuppelstange 10 über einen lösbaren antriebsseitigen Verbindungsbereich trennbar mit der Verbindungswelle 9 und rotorseitig über einen lösbaren rotorseitigen Verbindungsbereich trennbar mit dem Rotor 2 verbunden.The coupling rod 10 is connected to the connecting shaft 9 via a detachable connection area on the drive side and detachably connected to the rotor 2 on the rotor side via a detachable connection area on the rotor side.

Antriebsseitig wird dieser lösbare Verbindungsbereich von dem antriebsseitigen Gelenk 11 gebildet.On the drive side, this releasable connection area is formed by the drive-side joint 11.

Rotorseitig ist das gegebenenfalls trennbare rotorseitige Gelenk 12 vorgesehen. Zusätzlich ist jedoch neben dem Gelenk 12 eine (weitere) Trennstelle 20 vorgesehen, so dass sich der Rotor 2 von der Kuppelstange 10 durch Trennung der Trennstelle 20 trennen lässt. In dem dargestellten Ausführungsbeispiel ist der Rotor 2 unter Zwischenschaltung eines trennbaren Rotorkopfes 21 an die Kuppelstange 10 bzw. an das Gelenk 12 angeschlossen. Der Rotorkopf 21 weist folglich antriebsseitig eine Gelenkhälfte des Gelenks 12 auf. Rotorseitig ist der Rotorkopf 21 lösbar mit dem Rotor 2 verbunden. Darauf wird im Folgenden noch eingegangen.On the rotor side, the possibly separable rotor-side joint 12 is provided. In addition, however, a (further) separation point 20 is provided next to the joint 12, so that the rotor 2 can be separated from the coupling rod 10 by separating the separation point 20. In the exemplary embodiment shown, the rotor 2 is connected to the coupling rod 10 or to the joint 12 with the interposition of a separable rotor head 21. The rotor head 21 consequently has a joint half of the joint 12 on the drive side. Is rotor side the rotor head 21 is detachably connected to the rotor 2. This will be discussed in the following.

In dem in Fig. 1 dargestellten Ausführungsbeispiel weist der rotorseitige Gehäusestutzen 17 einerseits einen festen ersten Stutzenabschnitt 17a und andererseits einen verschiebbaren zweiten Stutzenabschnitt 17b auf. Der verschiebbare zweite Stutzenabschnitt 17b ist zur Freilegung (und Trennung) des rotorseitigen Verbindungsbereichs axial in Richtung der Gehäuseöffnung 6 des Pumpengehäuses 4 auf den ersten Stutzenabschnitt 17a schiebbar. Dabei ist der verschiebbare zweite Stutzenabschnitt 17b rohrförmig und im Ausführungsbeispiel im Wesentlichen zylindrisch ausgebildet, er lässt sich auf den festen Stutzenabschnitt 17a schieben und damit wird der rotorseitige Verbindungsbereich, nämlich die Trennstelle 20 freigelegt. Anschließend kann eine Trennung zwischen Rotor und Kuppelstange erfolgen, ohne dass das Kupplungsgelenk 12 selbst zerlegt werden muss. Rotor und Stator lassen sich einfach austauschen, nachdem das Gehäuseteil 17b auf das Gehäuseteil 17a geschoben und die Trennstelle gelöst wurde.In the in Fig. 1 In the illustrated embodiment, the rotor-side housing connector 17 has a fixed first connector section 17a on the one hand and a displaceable second connector section 17b on the other hand. To expose (and separate) the rotor-side connection area, the displaceable second connection section 17b can be pushed axially in the direction of the housing opening 6 of the pump housing 4 onto the first connection section 17a. The displaceable second connector section 17b is tubular and, in the exemplary embodiment, essentially cylindrical, it can be pushed onto the fixed connector section 17a and the rotor-side connection area, namely the separation point 20, is thus exposed. A separation between the rotor and the coupling rod can then take place without the coupling joint 12 itself having to be dismantled. The rotor and stator can easily be exchanged after the housing part 17b has been pushed onto the housing part 17a and the separation point has been released.

In dem dargestellten Ausführungsbeispiel ist die Trennstelle 20 gleichsam in den Rotor 2 integriert, indem endseitig an den Rotor 2 lösbar der Rotorkopf 21 unter Bildung der Trennstelle 20 angeschlossen ist. Der Rotorkopf 21 weist dabei eine gewisse Länge auf, so dass er als Verlängerung des Rotors dient und damit auch den verschiebbaren Stutzenabschnitt 17b überbrückt. Denn das Kupplungsgelenk 12 ist innerhalb des festen Stutzenabschnittes 17a angeordnet. Der Rotorkopf 21 durchgreift folglich im Sinne einer Verlängerung den ersten Stutzenabschnitt 17b und reicht bis in den zweiten Stutzenabschnitt 17a hinein. Der Rotorkopf 21 weist dazu die eine Gelenkhälfte des Kupplungsgelenks 12 auf. Die andere Gelenkhälfte ist Bestandteil der Kuppelstange 10. Dabei weist der Rotorkopf 21 an dem dem Rotor 2 zugewandten Ende einen Flansch 32 auf, der mittels Schrauben 33 mit dem Rotor 2, verschraubt wird. Dabei ist in dem Ausführungsbeispiel erkennbar, dass diese Verschraubung unter Zwischenschaltung eines Distanzelementes 22 erfolgt, wobei dieses Distanzelement als (zweiteilige) Distanzhülse 22 ausgebildet ist. Diese Distanzhülse 22, die aus zwei Halbschalen bestehen kann, lässt sich nach dem Lösen der Schrauben 33 entnehmen, so dass in axialer Richtung ein Freiraum und damit ein Verschiebeweg für den Rotor 2 entsteht, wodurch die Demontage erleichtert wird. Darauf wird im Folgenden noch eingegangen.In the exemplary embodiment shown, the separation point 20 is integrated into the rotor 2, as it were, in that the rotor head 21 is detachably connected at the end to the rotor 2, forming the separation point 20. The rotor head 21 has a certain length so that it serves as an extension of the rotor and thus also bridges the displaceable connecting piece portion 17b. This is because the coupling joint 12 is arranged within the fixed connector section 17a. The rotor head 21 consequently extends through the first connection section 17b in the sense of an extension and extends into the second connection section 17a. For this purpose, the rotor head 21 has one joint half of the coupling joint 12. The other half of the joint is part of the coupling rod 10. The rotor head 21 has an end facing the rotor 2 Flange 32 which is screwed to rotor 2 by means of screws 33. It can be seen in the exemplary embodiment that this screw connection takes place with the interposition of a spacer element 22, this spacer element being designed as a (two-part) spacer sleeve 22. This spacer sleeve 22, which can consist of two half-shells, can be removed after loosening the screws 33, so that a free space and thus a displacement path is created for the rotor 2 in the axial direction, which facilitates dismantling. This will be discussed in the following.

Es ist im Übrigen erkennbar, dass zwischen dem ersten Stutzenabschnitt 17a und dem zweiten Stutzenabschnitt 17b zumindest eine Dichtung 18 vorgesehen ist, welche den ersten Stutzenabschnitt 17a gegen den zweiten Stutzenabschnitt 17b flüssigkeitsdicht und druckdicht abdichtet, und zwar im montierten Zustand, der in Fig. 1 dargestellt ist. In dem Ausführungsbeispiel ist die Dichtung 18 außenumfangsseitig (z. B. in einer Nut) an dem ersten Stutzenabschnitt 17a oder einem daran angeschlossenen Adapterstück 23 angeordnet. Denn in Fig. 1 ist erkennbar, dass an den festen ersten Stutzenabschnitt 17a, der endseitig einen Flansch 24 aufweist, ein Adapterstück 23 angeschlossen ist. Dieses Adapterstück 23 trägt die Dichtung 18. Das verschiebbare Stutzenteil 17b ist an diesem Adapterstück 23 mit Befestigungsschrauben 25 befestigt, d. h. es ist gleichsam über das Adapterstück 23 mit den Befestigungsschrauben 25 an dem Flansch 24 angeschlossen.It can also be seen that at least one seal 18 is provided between the first nozzle section 17a and the second nozzle section 17b, which seals the first nozzle section 17a against the second nozzle section 17b in a liquid-tight and pressure-tight manner, namely in the assembled state, which is shown in FIG Fig. 1 is shown. In the exemplary embodiment, the seal 18 is arranged on the outer circumference (for example in a groove) on the first connector section 17a or on an adapter piece 23 connected to it. Because in Fig. 1 it can be seen that an adapter piece 23 is connected to the fixed first connector section 17a, which has a flange 24 at the end. This adapter piece 23 carries the seal 18. The displaceable connection piece 17b is fastened to this adapter piece 23 with fastening screws 25, ie it is connected to the flange 24 via the adapter piece 23 with the fastening screws 25.

Alternativ oder ergänzend wird das verschiebbare Stutzenteil 17b rotorseitig mittels Befestigungsschrauben 26 an einem statorseitigen Flansch 29 oder Adapterstück 27 befestigt.As an alternative or in addition, the displaceable connecting piece 17b is fastened on the rotor side by means of fastening screws 26 to a flange 29 or adapter piece 27 on the stator side.

Insofern ist in Fig. 1 erkennbar, dass bei der dargestellten Exzenterschneckenpumpe als Ausgangspunkt auf ein aus dem Stand der Technik bekanntes Sauggehäuse zurückgegriffen werden kann, welches bereits den festen Stutzenabschnitt 17a aufweist und der verschiebbare Stutzenabschnitt 17b wird gleichsam als zusätzliche Komponente unter Bildung des erfindungsgemäßen Sauggehäuses 4 zur Verfügung gestellt.In this respect, in Fig. 1 It can be seen that in the case of the eccentric screw pump shown, the starting point is based on one known from the prior art Suction housing can be used, which already has the fixed connection section 17a and the displaceable connection section 17b is made available as it were as an additional component to form the suction housing 4 according to the invention.

Im Übrigen ist erkennbar, dass der Stator 1 mit Spannstangen 28 in axialer Richtung zwischen einem ersten Flansch 29 und einem zweiten Flansch 30 verspannt wird. Der erste Flansch 29 ist auf der Seite des Pumpengehäuses 4 angeordnet. Der zweite Flansch 30 ist auf der dem Pumpengehäuse 4 gegenüberliegenden Seite des Stators angeordnet. Er ist Bestandteil des Anschlussstutzens bzw. Druckstutzens 5. Die Flansche 29, 30 weisen Ausnehmungen 31 auf, durch welche die Spannstangen 28 hindurchgeführt sind. Erfindungsgemäß sind diese Ausnehmungen 31 zumindest im Bereich eines der Flansche als randseitig offene Ausnehmungen, z. B. Langlöcher ausgebildet, so dass die Spannstangen 28 im Bereich dieses Flansches in radialer Richtung demontierbar sind. Die Spannstangen 28 sind dabei mit Muttern 28' fixierbar bzw. verspannbar.It can also be seen that the stator 1 is braced with tension rods 28 in the axial direction between a first flange 29 and a second flange 30. The first flange 29 is arranged on the side of the pump housing 4. The second flange 30 is arranged on the side of the stator opposite the pump housing 4. It is part of the connection piece or pressure port 5. The flanges 29, 30 have recesses 31 through which the tension rods 28 are passed. According to the invention, these recesses 31 are at least in the region of one of the flanges as recesses open on the edge, for. B. elongated holes so that the tie rods 28 can be dismantled in the radial direction in the region of this flange. The tie rods 28 can be fixed or braced with nuts 28 '.

Die Demontage des Rotors und/oder Stators erfolgt bei dem dargestellten Ausführungsbeispiel wie folgt:
Zunächst werden die Befestigungsschrauben 25 und 26 des verschiebbaren Stutzenabschnitts 17b gelöst, so dass anschließend der verschiebbare Stutzenabschnitt 17b in Richtung des Pfeils P auf den ersten Stutzenabschnitt 17a geschoben werden kann. Dadurch wird der Bereich der Trennstelle 20 freigelegt. Es lassen sich dann die Schrauben 33 lösen und anschließend die Distanzhülse 22 entfernen (vgl. Fig. 2). Auf diese Weise besteht der bereits beschriebene axiale Freiraum zwischen dem Rotor 2 und dem davon getrennten Rotorkopf 21. Nun können die Spannstangen 28 gelöst und entfernt werden. Währenddessen oder anschließend besteht die Möglichkeit, das Adapterstück 27 mit dem daran befestigten Flansch 29 in axialer Richtung entlang des Pfeils P zu verschieben. Durch den nun insgesamt gewonnenen Freiraum lassen sich Rotor 2 und Stator 1 ebenfalls in Richtung des Pfeils P verschieben und entnehmen. Insgesamt gelingt ein Austausch von Rotor und/oder Stator ohne Zerlegung des Kupplungsgelenkes 12 und insbesondere ohne Demontage des Druckstutzens 5 und des Sauggehäuses 4.
The dismantling of the rotor and / or stator takes place in the illustrated embodiment as follows:
First, the fastening screws 25 and 26 of the displaceable connecting piece section 17b are loosened, so that the displaceable connecting piece section 17b can then be pushed in the direction of the arrow P onto the first connecting piece section 17a. As a result, the area of the separation point 20 is exposed. The screws 33 can then be loosened and the spacer sleeve 22 can then be removed (cf. Fig. 2 ). In this way, there is the axial free space already described between the rotor 2 and the rotor head 21, which is separated therefrom. The tension rods 28 can now be released and removed become. During this or afterwards there is the possibility of moving the adapter piece 27 with the flange 29 attached to it in the axial direction along the arrow P. Due to the overall free space that has now been gained, rotor 2 and stator 1 can also be moved in the direction of arrow P and removed. Overall, the rotor and / or stator can be exchanged without dismantling the coupling joint 12 and in particular without dismantling the pressure connection 5 and the suction housing 4.

Im Übrigen ist erkennbar, dass bei der dargestellten Ausführungsform der elastomere Stator 1 über seine gesamte Länge oder im Wesentlichen die gesamte Länge eine im Wesentlichen konstante Wandstärke aufweist. Gleiches gilt für den dargestellten Statormantel 1' (aus Metall). Der Stator 1 ist im Ausführungsbeispiel fest mit dem Mantel 1' verbunden, z. B. in diesem einvulkanisiert.It can also be seen that in the embodiment shown, the elastomeric stator 1 has an essentially constant wall thickness over its entire length or essentially over its entire length. The same applies to the stator casing 1 'shown (made of metal). In the exemplary embodiment, the stator 1 is firmly connected to the jacket 1 ', e.g. B. vulcanized in this.

Die dargestellte Pumpe kann Gegenstand eines Pumpensystems bzw. eines Entwässerungssystems sein, das z. B. im Bergbau zum Einsatz kommen kann, wobei Gegenstand eines solchen Pumpensystems zumindest die dargestellte Pumpe und ein nicht dargestellter Entwässerungstank sind.The pump shown can be the subject of a pumping system or a drainage system that z. B. can be used in mining, the subject of such a pump system are at least the pump shown and a drainage tank, not shown.

Besondere Bedeutung kommt dem Rotoraggregat zu, das aus dem Rotor 2 mit Rotorkopf 21 und der Distanzhülse 22 bestehen kann.The rotor assembly, which can consist of the rotor 2 with the rotor head 21 and the spacer sleeve 22, is of particular importance.

Eine zweite Ausführungsform der Erfindung ist in Fig. 3 ausschnittsweise dargestellt. Dieser zweite Aspekt der Erfindung betrifft die Antriebsseite des Pumpengehäuses. Der antriebsseitige Gehäusestutzen 16 besteht hier aus einem ersten, festen Stutzenabschnitt 16a und einem zweiten verschiebbaren Stutzenabschnitt 16b. Der zweite Stutzenabschnitt 16b ist im dargestellten Ausführungsbeispiel axial verschiebbar. Durch eine axiale Verschiebung des zweiten Stutzenabschnitts 16b lässt sich der Bereich des antriebsseitigen Gelenks 11 freilegen und folglich zugänglich machen. Dabei erfolgt eine Verschiebung des zweiten Stutzenabschnitts 16b axial in Richtung auf den ersten Stutzenabschnitt 16a und folglich in Richtung der Einlassöffnung 6 des Pumpengehäuses 4.A second embodiment of the invention is shown in FIG Fig. 3 shown in detail. This second aspect of the invention relates to the drive side of the pump housing. The drive-side housing connector 16 here consists of a first, fixed connector section 16a and a second displaceable connector section 16b. The second connector section 16b is axially displaceable in the illustrated embodiment. Axial displacement of the second connecting piece section 16b, the area of the drive-side joint 11 can be exposed and consequently made accessible. The second connection section 16b is shifted axially in the direction of the first connection section 16a and consequently in the direction of the inlet opening 6 of the pump housing 4.

Zwischen dem ersten Stutzenabschnitt 16a und dem zweiten Stutzenabschnitt 16b ist zumindest eine Dichtung 18' vorgesehen. Nachdem der zweite Stutzenabschnitt 16b auf den ersten Stutzenabschnitt 16a geschoben wird, lässt sich anschließend die Manschette 19 des antriebsseitigen Gelenks 11 entfernen und das Gelenk lässt sich zerlegen. Anschließend lässt sich die Kuppelstange 10 gemeinsam mit dem daran angeschlossenen Rotor 2 von der Antriebsseite 2 weg verschieben bzw. herausziehen. Im Übrigen ist eine Demontage und ein Austausch der Verbindungswelle und/oder der Gleitringdichtung möglich.At least one seal 18 'is provided between the first nozzle section 16a and the second nozzle section 16b. After the second socket section 16b is pushed onto the first socket section 16a, the sleeve 19 of the drive-side joint 11 can then be removed and the joint can be dismantled. The coupling rod 10 can then be moved away from the drive side 2 or pulled out together with the rotor 2 connected to it. In addition, it is possible to dismantle and replace the connecting shaft and / or the mechanical seal.

Claims (15)

  1. A progressive cavity pump having at least
    - a stator (1),
    - a rotor (2) rotating inside the stator,
    - a drive (3) for the rotor (2),
    - a pump housing (4) which is connected to the stator (1) and has at least one housing opening (6) for the medium to be conveyed,
    - a connecting shaft (9) connected to the drive (3),
    - a coupling rod (10) which is situated in the pump housing (4) and is connected on the drive side to the connecting shaft (9) via at least one detachable drive-side connecting region and on the rotor side to the rotor (2) via at least one detachable rotor-side connecting region,
    the pump housing (4) having a drive-side housing neck (16) and a stator-side housing neck (17),
    the coupling rod (10) being connected to the rotor (2) via a rotor-side joint (12),
    characterised in that the rotor-side housing neck (17) has a fixed first neck section (17a) and a displaceable second neck section (17b), which can be pushed axially onto the first neck section (17a) towards the housing opening (6) of the pump housing (4) in order to expose the detachable rotor-side connecting region,
    the detachable connecting region is formed by a disconnection point (20) provided next to the joint (12) in that
    the rotor (2) is connected to the rotor-side joint (12) with interposition of a rotor head (21) which can be disconnected from the rotor,
    wherein the rotor (2) is connected to the rotor head (21) with interposition of a spacer element (22),
    wherein the rotor head (21) extends as an extension element through the second neck section into the first neck section when in the installed state.
  2. The progressive cavity pump according to Claim 1, characterised in that the drive-side housing neck (16) has a fixed first neck section (16a) and a displaceable second neck section (16b), which can be pushed axially onto the first neck section (16a) towards the housing opening (6) of the pump housing (4) in order to expose the drive-side connecting region.
  3. The progressive cavity pump according to Claim 2, the coupling rod (10) being connected to the connecting shaft (9) via a rotor-side joint (11), characterised in that the detachable connecting region is formed by the disconnectable joint (11) or by a disconnection point provided next to the joint, wherein a disconnection point is preferably situated on the other side of the joint (11) from the coupling rod (10).
  4. The progressive cavity pump according to any one of Claims 1 to 3, characterised in that the disconnection point (20) provided next to the joint (12) is situated on the other side of the joint (12) from the coupling rod (10).
  5. The progressive cavity pump according to any one of Claims 1 to 4, characterised in that the spacer element (22) is in the form of a spacer sleeve.
  6. The progressive cavity pump according to any one of Claims 1 to 5, characterised in that the rotor-side joint (12) is situated in the first neck section (12).
  7. The progressive cavity pump according to any one of Claims 1 to 6, characterised in that the displaceable second neck section (16b, 17b) is sealed off from the fixed first neck section (16a, 17a) with at least one seal (18, 18').
  8. The progressive cavity pump according to any one of Claims 1 to 7, characterised in that the displaceable second neck section (16b, 17b) is tubular and preferably cylindrical or substantially cylindrical at least in some regions.
  9. The progressive cavity pump according to any one of Claims 1 to 8, characterised in that the displaceable second neck section (16b, 17b) is fastened to the fixed first neck section (16a, 17a) with fastening means, e.g. fastening screws.
  10. The progressive cavity pump according to any one of Claims 1 to 9, characterised in that the displaceable neck section (16b, 17b) is formed from multiple parts and consists of at least two telescopically displaceable sleeves.
  11. The progressive cavity pump according to any one of Claims 1 to 10, the stator (1) being clampable in the axial direction between a first flange (29) and a second flange (30) with clamping rods (28), the clamping rods (28) fitting through cut-outs (31) in the flanges, characterised in that the cut-outs (31) of at least one of the flanges (29, 30) are cut-outs which are open at the edge so that the clamping rods (28) can be removed in the radial direction in the region of the flange (29, 30) in question.
  12. The progressive cavity pump according to any one of Claims 1 to 11, characterised in that the (elastomer) stator (1) has a substantially constant wall thickness over its entire length or substantially its entire length.
  13. The progressive cavity pump according to any one of Claims 1 to 12, characterised in that the rotor (2) is hollow, e.g. drilled hollow, at least over some of its length, preferably over the entire length.
  14. A pump system, e.g. for drainage in mining or tunnel construction, having at least one progressive cavity pump according to any one of Claims 1 to 14 and at least one tank, e.g. drainage tank, to which the progressive cavity pump is connected.
  15. A rotor assembly for a progressive cavity pump according to any one of Claims 1 to 13, having a rotor (2) and a rotor head (21) and, if necessary, a spacer element (22).
EP17800800.9A 2016-11-10 2017-11-09 Eccentric screw pump Active EP3538766B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016121581.3A DE102016121581B4 (en) 2016-11-10 2016-11-10 Cavity Pump
PCT/EP2017/078808 WO2018087254A1 (en) 2016-11-10 2017-11-09 Eccentric screw pump

Publications (2)

Publication Number Publication Date
EP3538766A1 EP3538766A1 (en) 2019-09-18
EP3538766B1 true EP3538766B1 (en) 2020-09-23

Family

ID=60388036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17800800.9A Active EP3538766B1 (en) 2016-11-10 2017-11-09 Eccentric screw pump

Country Status (7)

Country Link
US (1) US11326595B2 (en)
EP (1) EP3538766B1 (en)
CN (1) CN109952435B (en)
AU (1) AU2017358848B2 (en)
DE (1) DE102016121581B4 (en)
DK (1) DK3538766T3 (en)
WO (1) WO2018087254A1 (en)

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JP7432921B2 (en) 2019-08-29 2024-02-19 兵神装備株式会社 Single shaft eccentric screw pump
WO2021039091A1 (en) * 2019-08-29 2021-03-04 兵神装備株式会社 Single-shaft eccentric screw pump
DE102019130981A1 (en) * 2019-11-15 2021-05-20 Seepex Gmbh Eccentric screw pump
DE102021111925A1 (en) 2021-05-07 2022-11-10 Seepex Gmbh progressing cavity pump
DE102021205936A1 (en) 2021-06-11 2022-12-15 Putzmeister Engineering Gmbh Eccentric screw pump device, pump system, discharge system and use of an eccentric screw pump device and/or a pump system and/or a discharge system
DE102021132561A1 (en) 2021-12-09 2023-06-15 Seepex Gmbh Articulated joint, rotating unit and progressive cavity pump
DE102021132549A1 (en) 2021-12-09 2023-06-15 Seepex Gmbh Articulated joint, rotating unit and progressive cavity pump

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JPH0777172A (en) * 1993-09-03 1995-03-20 Heishin Sobi Kk Uniaxial eccentric screw pump
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Also Published As

Publication number Publication date
US11326595B2 (en) 2022-05-10
CN109952435B (en) 2021-04-06
US20190257308A1 (en) 2019-08-22
DK3538766T3 (en) 2020-12-07
AU2017358848A1 (en) 2019-05-30
CN109952435A (en) 2019-06-28
DE102016121581A1 (en) 2018-05-17
WO2018087254A1 (en) 2018-05-17
AU2017358848B2 (en) 2022-01-27
DE102016121581B4 (en) 2018-07-26
EP3538766A1 (en) 2019-09-18

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