EP3749861B1 - Pompe à vis sans fin excentrique - Google Patents

Pompe à vis sans fin excentrique Download PDF

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Publication number
EP3749861B1
EP3749861B1 EP19700342.9A EP19700342A EP3749861B1 EP 3749861 B1 EP3749861 B1 EP 3749861B1 EP 19700342 A EP19700342 A EP 19700342A EP 3749861 B1 EP3749861 B1 EP 3749861B1
Authority
EP
European Patent Office
Prior art keywords
housing
pump
seal
stator
connecting shaft
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
EP19700342.9A
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German (de)
English (en)
Other versions
EP3749861A1 (fr
Inventor
Dirk Overmeier
Peter McGarian
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Seepex GmbH filed Critical Seepex GmbH
Publication of EP3749861A1 publication Critical patent/EP3749861A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/604—Mounting devices for pumps or compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/70—Disassembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/60—Shafts

Definitions

  • Such an eccentric screw pump is a pump from the group of rotating positive displacement pumps that are used to convey a wide variety of media and, in particular, highly viscous liquids in a wide variety of industrial sectors.
  • the liquids to be pumped can e.g. B. also contain solids.
  • the stator preferably consists of elastic or elastomeric material and is usually surrounded by a one-part or multi-part stator casing or stator housing. Alternatively, however, stators made of other materials, e.g. B. made of metal.
  • the pump housing connected to the stator on the suction side is usually referred to as the suction housing and the housing connected to the stator on the pressure side, e.g. B. as a pressure port.
  • the suction housing as the suction housing is therefore independent of the actual conveying direction.
  • this coupling rod is designed in one piece with the connecting shaft and/or is designed in one piece with the rotor.
  • the connecting shaft is also referred to as a stub shaft, it is usually connected directly to the output shaft of the drive and serves as a kind of connecting piece between the output shaft of the drive and the power transmission parts of the pump.
  • the connection housing arranged between the pump housing (suction housing) and the drive is also referred to as a "lantern" in practice. This serves z. B. the inclusion or attachment and support of the pump housing on the one hand and the drive on the other hand, so that this connection housing or the lantern z. B.
  • connection housing is mounted on a base plate or directly on a foundation and supports and carries the drive and the pump housing. Hanging arrangements are also possible.
  • this connection housing is designed as an open connection housing or at least as an openable connection housing, which is consequently accessible from the outside through an opening.
  • the connection housing is preferably a housing that is separate from the pump housing, so that z. B. the pump housing is fastened to the connection housing by means of screws or the like.
  • the invention also covers embodiments in which the pump housing and connecting housing are designed in one piece and are therefore inseparable from one another.
  • this is usually installed in a (pipe) line system, so that e.g. B. on the suction housing (ie the inlet or outlet opening) and a suction line are connected to the pressure port of the pump, a pressure line.
  • a (pipe) line system so that e.g. B. on the suction housing (ie the inlet or outlet opening) and a suction line are connected to the pressure port of the pump, a pressure line.
  • the stator of the eccentric screw pump can be a longitudinally split stator from at least two stator shells, z. B. stator shells. Furthermore, the stator can be exchanged separately from the stator casing and consequently not firmly and in particular not integrally connected to the stator casing. This makes it possible to exchange the elastomeric stator separately from the stator casing, without the need for costly disassembly of the pump.
  • the stator shell consists z. B. from at least two casing segments, which form a stator clamping device as clamping segments, with which the stator can be clamped in the radial direction against the rotor. In this case, the stator shell made of z. B. three shell segments or four shell segments that form the stator clamping device.
  • a progressing cavity pump of this type is z. B. from the WO 2009/024279 A1 or DE 10 2014 112 550 B4 famous.
  • an eccentric screw pump with rotor separation is known.
  • the rotor is detachably connected to the coupling joint or a joint part of the coupling joint without dismantling the coupling joint.
  • such pumps with rotor separation are also covered by the invention.
  • the connecting shaft is sealed with a (preferably single-acting) mechanical seal.
  • a mechanical seal is subject to wear, so that it must be replaced or repaired as a wearing part if necessary.
  • a generic eccentric screw pump is also from the DE 102005 039 618 A1 famous.
  • the dismantling of the rotor unit in particular, e.g. B. for cleaning purposes be facilitated.
  • the rotor drive shaft is arranged within a hollow shaft passing through the sealing unit.
  • the invention is based on the object of creating an eccentric screw pump of the type described at the outset which, with a simple structure, is characterized by optimized servicing and maintenance options, particularly in the area of the mechanical seal.
  • the invention teaches an eccentric screw pump with the features of claim 1. It is provided that the seal housing of the mechanical seal is designed as an (axially) divided seal housing and, on the one hand, a seal housing that surrounds the slide ring in the assembled state and is attached to the pump housing and/or the Connection housing fixed base housing and on the other hand has a housing cover carrying the mating ring. According to the invention, the housing cover (together with the mating ring) is detachably fastened to the base housing, so that the housing cover together with the mating ring can be separated from the base housing can be separated and reattached.
  • the seal housing is consequently designed to be divided in such a way that the connecting shaft with the sliding ring attached to it (without the mating ring) can be pulled out of the seal housing.
  • the mechanical seal is designed as a preferably single-acting mechanical seal, ie with a single sealing surface that is formed between a single sliding ring and a single mating ring.
  • a single-acting mechanical seal consequently means a mechanical seal with a single mechanical ring-counter ring pair.
  • the housing cover (with the mating ring attached to it) can be removed directly from the open connection housing and in this way all parts of the mechanical seal can be serviced or replaced, preferably without dismantling the pump housing and the piping system connected to it and without dismantling of the drive.
  • the two-part mechanical seal housing according to the invention also leads to advantages during subsequent assembly, because the connecting shaft (plug-in shaft) with the slide ring attached to it can be threaded into the mechanical seal housing, namely into the stationary base housing, without the risk of damage to the mating ring, since this mating ring remains detached from the base housing during assembly. Only after the connecting shaft has been inserted (and centered) and preferably only after the connecting shaft has been attached or inserted onto or into the output shaft of the drive is the housing cover with the stationary mating ring attached to the main housing, so that there is no risk of damage exists. Overall, with the configuration according to the invention, maintenance work on the mechanical seal on the eccentric screw pump can be carried out easily and quickly, so that particularly economical operation of the pump is possible.
  • the rotating unit or a part of the rotating unit which consists of at least the connecting shaft and preferably also the coupling rod (possibly with joints) arranged between the rotor and the connecting shaft, can be moved uniformly in the course of maintenance work in an axial direction thanks to the configuration according to the invention Pull out direction from the pump housing after the housing cover of the seal housing has been detached from the main housing.
  • the rotating unit is understood to mean the unit rotating during operation, which can be separated from the drive as a whole and consists at least of the connecting shaft, the coupling rod (possibly with joints) and the rotor.
  • the invention can be particularly preferably implemented in such embodiments in which the stator of the pump can be removed without the drive and without the pressure line and without the suction line and the suction housing must be removed.
  • Various practical solutions are known for this purpose. With such solutions, the mechanical seal can now be maintained or replaced in the manner described without having to dismantle any part of the line system. In such embodiments, the invention is particularly advantageous.
  • the invention is particularly preferably implemented in an eccentric screw pump with a longitudinally divided stator, the z. B. from several (elastic) partial stator shells, z. B. stator shells and / or several shell segments (as a stator clamping device). Because with such an embodiment, there is the particularly simple possibility of only dismantling or partially dismantling the stator and thus gaining access to the rotating unit via the stator-side housing opening of the pump housing (saute housing), which can now (after separation of the seal housing) be completely pulled out can be. In principle, it is possible to completely pull out the entire rotating unit including the rotor.
  • the rotor is first separated from the rotating unit or the remaining part of the rotating unit, so that the remaining part of the rotating unit (connecting shaft and coupling rod, possibly with joints) can then be pulled out of the pump housing as a unit.
  • the invention can be particularly preferably used in eccentric screw pumps with rotor separation (e.g. according to EP 2 428 680 B1 ) realize.
  • the rotor is detachably connected to the rotor-side coupling joint without dismantling the rotor-side coupling joint, in that a separation point separate from the joint is realized.
  • the rotor can consequently be separated from the rotating unit without separating the joint and the connecting shaft with the coupling rod remains as the rotating unit including both joints and the so-called rotor head, which is separable from the rotor. This is shown in the description of the figures.
  • the basic housing of the (single-acting) mechanical seal according to the invention is preferably designed as a hollow cylinder.
  • the housing cover is also preferably designed as a hollow cylinder or ring-shaped, so that it has a central opening through which the connecting shaft can be passed.
  • On the housing cover is the Counter-ring fastened in a rotationally fixed manner, preferably inserted into the counter-ring with the interposition of a seal.
  • the housing cover is preferably detachably fastened to the main housing with (positive and/or non-positive) fastening means. It can be z. B. be screws and / or locking means and / or clamping means.
  • the drive of an eccentric screw pump generally has an output shaft, on the pump-side output end of which the connecting shaft is detachably fastened with its drive-side shaft end.
  • the output shaft of the drive consequently protrudes into the connection housing, so that the connection shaft is coupled to the output shaft of the drive within the connection housing.
  • the output end (of the output shaft) is spaced apart from the main housing of the mechanical seal (in the installed state) in such a way that the housing cover of the mechanical seal housing is located between the output end (of the output shaft) and basic housing can be removed from the connecting housing. This can e.g. B.
  • the housing cover preferably including the mating ring attached thereto, has a length or total length L in the axial direction that is less than the axial distance A between the output end of the drive shaft and the base housing of the mechanical seal. Consequently, after the connecting shaft has been pulled out of the connecting housing, the housing cover with the mating ring attached to it can be passed between the stationary base housing and the output shaft and can be removed from the connecting housing, e.g. B. for the purpose of exchange.
  • the described axial distance A is less than the described overall length L. Because there is also that Possibility of separating the mating ring of the mechanical seal from the housing cover before radial removal from the connection housing, so that it can be removed from the connection housing separately and without the housing cover and can then be replaced.
  • the subject matter of the invention is also a mechanical seal for an eccentric screw pump of the type described.
  • the (single-acting) mechanical seal according to the invention with the divided seal housing is consequently also independently protected.
  • the invention also relates to a method for maintaining (or inspecting) and/or replacing a mechanical seal of an eccentric screw pump of the type described or open junction boxes. At least the connecting shaft with the sliding ring arranged on the connecting shaft is then removed in the axial direction from the connecting housing and particularly preferably through the pump housing and out of the front opening.
  • the already described rotating unit of the eccentric screw pump (including the connecting shaft), if necessary after previous separation of the rotor, is removed in the axial direction through the pump housing, e.g. B. after the stator has been removed, z. B. in a pump with longitudinally divided stator.
  • the method according to the invention also relates to the assembly of the connecting shaft or the rotating unit (e.g.
  • the connecting shaft or the rotating unit is first pushed into the connecting housing (through the front opening) and the connecting shaft is inserted through the basic housing and the housing cover that has been detached from it e.g. B. attached to the output shaft of the drive or plugged into it. Only then is the housing cover fastened to the basic housing.
  • this procedure has the great advantage that damage to the mechanical seal or the mating ring on the housing cover is avoided, since this is not fixed but (temporarily) loosely arranged in the connection housing.
  • the invention optionally proposes removing the rotating unit from the pump housing during disassembly using an assembly tool (provided especially for this purpose) and/or inserting it into the pump housing during assembly.
  • an assembly tool has at least one plate-shaped or bowl-shaped receptacle for the rotating unit and a handle attached to it. Details on this are described by way of example in the description of the figures.
  • an eccentric screw pump is shown in simplified form, the basic structure of which has a stator 1 , a rotor 2 rotating in the stator 1 and a drive 3 for the rotor 2 .
  • a pump housing 4 which is referred to as the suction housing 4 is connected to the stator 1 on the suction side.
  • a housing part connected to the stator 1 on the pressure side is referred to, for example, as a connection piece or pressure piece 5 .
  • the pump housing 4 has an inlet opening (or outlet opening depending on the direction of operation) 6, via the z.
  • the medium to be pumped is supplied, which is pumped from the pump housing 4 via the stator/rotor to the pressure port 5 .
  • the pump housing 4 has a (front) housing opening 7 on the stator side, through which the medium from the pump housing 4 enters the stator 1 .
  • the drive 3 is equipped with an output shaft 8 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, with 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, with the coupling rod 10 and the joints 11, 12 the eccentric movement of the rotor 2 or rotor end is made possible.
  • connection housing 14 is designed to be open, in the exemplary embodiment open at the side, i. H. it has side openings. In principle, however, there is also the possibility that these (lateral, upper and/or lower) openings can be closed, so that the connection housing can also be designed as a closed housing that can, however, be opened.
  • the connecting shaft 9 is sealed with a shaft seal, which is designed as a mechanical seal 13, specifically as a single-acting mechanical seal 13. This mechanical seal 13, which is of particular importance according to the invention, is described in more detail below.
  • the coupling rod 10 is (essentially) arranged inside the pump housing 4
  • the connecting shaft 9 is (essentially) arranged inside the connecting housing 14
  • the mechanical seal 13 is also (substantially) arranged within the connecting housing 14 .
  • the stator 1 is designed as a longitudinally divided stator and, in the exemplary embodiment, it consists of two stator half-shells 1a, 1b that are only indicated. Divided longitudinally means along the longitudinal axis of the stator or parallel to it.
  • the stator is at least partially surrounded by a stator casing 15, which in the exemplary embodiment is designed as a longitudinally divided casing and has a plurality of casing segments 16, which serve as clamping segments and form a stator clamping device. Details are not shown, they are z. B. from the DE 10 2014 112 550 B4 or the WO 2009/024279 A1 famous. However, the invention can also be implemented with other stator constructions.
  • the mechanical seal 13 has a seal housing 18 which is attached to the pump housing 4 and / or on the connecting housing 14 by z. B. in the course of fastening the pump housing 4 to the connection housing 14 between these two housings 4, 14 is clamped and protrudes into the interior of the connection housing 14. Furthermore, the mechanical seal 13 has a slide ring 19 fixed in a rotationally fixed manner on the shaft 9 and rotating in the seal housing 18 as well as a stationary mating ring 20 fixed to the seal housing 18 . The sliding ring 19 is pressed by a spring element 21 against the mating ring 20, specifically adjustable via an adjusting ring 22. Sliding ring 19, spring element 21 and adjusting ring 22 are usually arranged on a carrier sleeve 23 which, for. B.
  • the sliding ring 19 which is non-rotatably connected to the connecting shaft 9, rotates relative to the stationary mating ring 20, specifically with sealing surfaces 19a, 20a facing one another on the front side, which are oriented essentially perpendicular to the axis of rotation R.
  • the seal housing 18 is designed as an (axially) divided seal housing. It has, on the one hand, a base housing 18a surrounding the slide ring 19 in the assembled state and, on the other hand, a housing cover 18b carrying the mating ring 20 .
  • the base housing 18a is fixed in a stationary manner to the connecting housing 14 and/or the pump housing 4 and for this purpose, in the exemplary embodiment, it has a collar 24 that runs around the outside and is fixed between the pump housing 4 and the connecting housing 14 .
  • the housing cover 18b is detachably attached to the base housing 18a, e.g. B.
  • the basic housing 18a is designed essentially as a hollow cylinder.
  • the housing cover 18b is ring-shaped and therefore has a central opening through which the connecting shaft 9 can be guided.
  • the configuration according to the invention enables simple maintenance or simple replacement and reassembly of a mechanical seal.
  • a comparative consideration of the 2 , 3 and 4 referred. 2 first shows the progressing cavity pump in the assembled state, but with the rotor already separated.
  • the mechanical seal 13 should be removed from the connection housing or pump housing.
  • the seal housing 18 according to the invention first of all 3 the housing cover 18b is removed from the basic housing 18a and thus the mating ring 20 is also separated from the slide ring 19, because the mating ring 20 is non-rotatably connected to the housing cover 18b, z. B.
  • the rotating unit can simply be pulled out in the manner described, without the pump or the components connected to it having to be dismantled any further.
  • the decisive factor here is that, within the scope of the invention, access is provided via the front-side opening 7 of the pump housing 4 for replacing the mechanical seal. This presupposes that there is sufficient space available for removing the rotating unit. In the exemplary embodiment, this takes place via the longitudinally divided stator.
  • the invention also encompasses embodiments in which the stator can be removed in other ways. If necessary, the pressure-side line system must also be dismantled beforehand. In any case, it is not necessary to dismantle the pump housing and the suction-side lines.
  • the output end 8a of the output shaft 8 is spaced from the basic housing 18a of the mechanical seal in such a way that the housing cover 18b can be removed from the connecting housing in the dismantled state of the connecting shaft between the output end 8a and the basic housing 18a leaves.
  • the housing cover 18b, including the mating ring 20 attached thereto has a length L in the axial direction that is less than the axial distance A between the output end 8a and the (mounted) basic housing 18a.
  • the design of the split seal housing 18 according to the invention not only has advantages during the disassembly described, but also during the subsequent assembly that is required. This is because it is now possible to first push the connecting shaft 9 or the entire rotating unit into the pump housing 4 and thereby push the connecting shaft 9 through the basic housing 18a without the risk of the mating ring 20 arranged in the housing cover being damaged. This is because the connecting shaft 9 is pushed through this housing cover 18b or the mating ring 20 and pushed onto the output shaft 8 or inserted into it before the housing cover 18b is attached to the basic housing 18a. This means that the housing cover 18b can move freely in the connection housing 14 is arranged and only after the insertion of the connecting shaft 9 is attached to the base housing 18a.
  • assembly and disassembly can be implemented particularly easily with an additional assembly tool 27, which is figure 5 is shown.
  • This assembly tool has, on the one hand, a receptacle 28 for the rotating unit and, on the other hand, a handle 29 fastened to the receptacle 28 .
  • the receptacle 28 can be plate-shaped or shell-shaped and is dimensioned in such a way that it accommodates the rotating unit (here coupling rod and connecting shaft) essentially or almost over the entire length, so that the rotating unit can rotate despite the "unstable structure" (e.g . B. with the joints) can be inserted properly from the rotor-side end face into the pump housing 4, namely up to the area of the output shaft 8 of the drive 3.
  • the rotating unit here coupling rod and connecting shaft
  • the length of the receptacle 28 of the assembly tool 27 is at least so large that the coupling rod including of the two joints finds space on it, so that the joints are supported and a stable arrangement is guaranteed.
  • the length of the receptacle of the assembly tool therefore preferably corresponds at least to the length of rotor head 17, joint 12, coupling rod 10 and joint 11.
  • the receptacle 28 is shell-shaped, so that it secures the rotating unit against falling.
  • This shell-shaped configuration can, for. B. arcuate in cross section, preferably circular, so that it has the shape of a (hollow) cylinder segment.
  • the flange 30 of the receiving tool to which the handle 29 on the one hand and the receptacle 28 on the other hand are connected, has a suitable receptacle or recess, e.g. B. has groove 31, which is U-shaped in the embodiment.
  • the rotating unit namely the rotor head 17 (positive) can be used, so that the rotating unit is held securely.
  • This receptacle/recess 31 is not only semicircular, but preferably U-shaped, so that higher joint designs (e.g. with cuff protection) can also be practicably accommodated.

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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)

Claims (12)

  1. Pompe à vis sans fin excentrique avec au moins
    - un stator (1)
    - un rotor (2) tournant dans le stator,
    - un entraînement (3) pour le rotor,
    - un corps de pompe (4) raccordé au stator (1), lequel comporte au moins une ouverture d'entrée ou de sortie (6) pour le milieu à transporter,
    - un boîtier de liaison (14) ouvert ou à ouvrir, disposé entre le corps de pompe (4) et l'entraînement (3)
    - un arbre de liaison (9) raccordé de façon séparable à l'entraînement (3), qui est disposé au moins en partie dans le boîtier de liaison (14),
    sachant que l'arbre de liaison (9) est étanchéifié avec une garniture mécanique d'étanchéité (13) pour la séparation étanche au liquide du corps de pompe (4) vis-à-vis de l'environnement ou vis-à-vis du boîtier de liaison (14),
    sachant que la garniture mécanique d'étanchéité (13) comporte un boîtier d'étanchéité (18) fixé au corps de pompe (4) et/ou au boîtier de liaison (14), une bague coulissante (19) fixée solidaire en rotation sur l'arbre de liaison (9) et tournant dans le boîtier d'étanchéité (18) et une contre-bague (20) fixe, fixée au boîtier d'étanchéité (18),
    sachant que le boîtier d'étanchéité (18) est constitué en tant que boîtier d'étanchéité divisé et comporte d'une part, un boîtier de base (18a) entourant à l'état monté la bague coulissante (19) et fixé au corps de pompe (4) et/ou au boîtier de liaison (14) et d'autre part, un couvercle de boîtier (18b) portant la contre-bague (20), caractérisée en ce que le couvercle de boîtier (18b) est fixé de façon séparable au boîtier de base (18a) et peut être séparé de celui-ci de telle manière que l'arbre de liaison (9) peut être extrait du boîtier d'étanchéité (18) avec la bague coulissante (19) fixée à celui-ci.
  2. Pompe à vis sans fin excentrique selon la revendication 1, caractérisée en ce que la garniture mécanique d'étanchéité (13) est constituée en tant que garniture mécanique d'étanchéité simple.
  3. Pompe à vis sans fin excentrique selon la revendication 1 ou 2, caractérisée en ce que le boîtier de base (18a) est constitué de forme cylindrique creuse et/ou en ce que le couvercle de boîtier (18b) est constitué de forme cylindrique creuse ou annulaire avec un passage central pour l'arbre de liaison (9).
  4. Pompe à vis sans fin excentrique selon l'une quelconque des revendications 1 à 3, sachant que l'entraînement (3) comporte un arbre de sortie (8) aux extrémités de sortie côté pompe (8a) duquel, l'arbre de liaison (9) est fixé de façon séparable avec son extrémité d'arbre côté entraînement, caractérisée ce que l'extrémité de sortie (8a) est éloignée du boîtier de base (18a) de la garniture mécanique d'étanchéité (13) de telle sorte que le couvercle de boîtier (18b) peut être enlevé du boîtier de liaison (14) à l'état démonté de l'arbre de liaison (9) entre l'extrémité de sortie (8a) et le boîtier de base (18a).
  5. Pompe à vis sans fin excentrique selon la revendication 4, caractérisée en ce que le couvercle de boîtier (18b) y compris de préférence la contre-bague (20) fixée à celui-ci, comporte une longueur (L) en direction axiale, qui est plus faible que la distance axiale (A) entre l'extrémité de sortie (8a) et le boîtier de base (18a) .
  6. Pompe à vis sans fin excentrique selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le stator (1) est composé de plusieurs segments de stator en tant que stator divisé longitudinalement et/ou en ce que le stator (1) est entouré d'une enveloppe de stator (15) qui est composée de préférence de plusieurs segments d'enveloppe (16) en tant qu'enveloppe divisée longitudinalement, qui forment de préférence un dispositif de serrage de stator.
  7. Garniture mécanique d'étanchéité, en particulier garniture mécanique d'étanchéité simple pour une pompe à vis sans fin excentrique selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le boîtier d'étanchéité (18) est constitué comme boîtier d'étanchéité divisé axialement et comporte d'une part un boîtier de base (18a) entourant à l'état monté la bague coulissante (19) et pouvant être fixé au corps de pompe (4) et/ou au boîtier de liaison (14) et d'autre part un couvercle de boîtier (18b) portant la contre-bague (20), qui est fixé de façon séparable au boîtier de base (18a) et pouvant être séparé de celui-ci.
  8. Procédé de maintenance et/ou d'échange d'une garniture mécanique d'étanchéité (13) d'une pompe à vis sans fin excentrique, selon l'une quelconque des revendications 1 à 6, sachant que la pompe à vis sans fin excentrique comporte au moins
    - un stator (1),
    - un rotor (2) tournant dans le stator,
    - un entraînement (3) pour le rotor,
    - un corps de pompe (4) raccordé au stator (1), lequel comporte au moins une ouverture d'entrée ou de sortie (6) pour le milieu à transporter,
    - un boîtier de liaison (14) ouvert ou à ouvrir, disposé entre le corps de pompe (4) et l'entraînement (3),
    - un arbre de liaison (9) raccordé de façon séparable à l'entraînement (3), qui est disposé au moins en partie dans le boîtier de liaison (14),
    sachant que l'arbre de liaison (9) est étanchéifié avec une garniture mécanique d'étanchéité (13) pour la séparation étanche au liquide du corps de pompe (4) vis-à-vis de l'environnement ou vis-à-vis du boîtier de liaison (14),
    sachant que la garniture mécanique d'étanchéité (13) comporte un boîtier d'étanchéité (18) fixé au corps de pompe (4) et/ou au boîtier de liaison (14), une bague coulissante (19) fixée solidaire en rotation sur l'arbre de liaison (9) et tournant dans le boîtier d'étanchéité (18) et une contre-bague (20) fixe, fixée au boîtier d'étanchéité (18),
    caractérisé en ce que le boîtier d'étanchéité (18) est constitué en tant que boitier d'étanchéité divisé et comporte d'une part un boîtier de base (18a) entourant à l'état monté la bague coulissante (19) et fixé au corps de pompe (4) et/ou au boîtier de liaison (14) et d'autre part un couvercle de boîtier (18b) portant la contre-bague (20), qui est fixée de façon séparable au boîtier de base (18a) et pouvant être séparé de celui-ci,
    et en ce que pour le démontage, le couvercle de boîtier (18b) est d'abord séparé du boîtier de base (18a) en passant à travers le boîtier de liaison (14) à ouverture ou ouvert et ensuite au moins l'arbre de liaison (9) avec la bague coulissante (19) disposée sur l'arbre de liaison (9) est enlevé du boîtier de liaison (14) en direction axiale et de préférence à travers le corps de pompe (4).
  9. Procédé selon la revendication 8, caractérisé en ce qu'une unité rotative de la pompe à vis sans fin excentrique, composée d'au moins une barre d'accouplement (10) et d'un arbre de liaison (9), est enlevée entièrement dans la direction axiale à travers le corps de pompe (4), par ex. à travers une ouverture de carter (7) tournée vers le stator.
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce que le stator (1) est d'abord démonté et l'unité rotative est ensuite enlevée du corps de pompe (4) à travers une ouverture de carter (7) tournée vers le stator (1).
  11. Procédé selon l'une quelconque des revendications 8 à 10, caractérisé en ce qu'au cours du montage, l'arbre de liaison (9) ou l'unité rotative sont d'abord introduits dans le corps de pompe (4) et l'arbre de liaison (9) est à cet effet passé à travers le boîtier de base (18a) et le couvercle de boîtier (18b) séparé de celui-ci et est par ex. monté sur l'arbre de sortie ou enfilé dans celui-ci et en ce que le couvercle de boîtier (18b) est ensuite fixé au boîtier de base (18a).
  12. Procédé selon l'une quelconque des revendications 8 à 11, caractérisé en ce que l'unité rotative peut être enlevée du corps de pompe pendant le démontage avec un outil de montage (27) et/ou peut être introduite dans le corps de pompe (4) pendant le montage, sachant que l'outil de montage comporte au moins un logement (28) pour l'unité rotative et une poignée (29) fixée à celui-ci.
EP19700342.9A 2018-02-06 2019-01-07 Pompe à vis sans fin excentrique Active EP3749861B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018102640.4A DE102018102640A1 (de) 2018-02-06 2018-02-06 Exzenterschneckenpumpe
PCT/EP2019/050258 WO2019154571A1 (fr) 2018-02-06 2019-01-07 Pompe à cavité progressive

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EP3749861A1 EP3749861A1 (fr) 2020-12-16
EP3749861B1 true EP3749861B1 (fr) 2022-02-23

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EP (1) EP3749861B1 (fr)
DE (1) DE102018102640A1 (fr)
WO (1) WO2019154571A1 (fr)

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DE102019130981A1 (de) * 2019-11-15 2021-05-20 Seepex Gmbh Exzenterschneckenpumpe
DE102021128157A1 (de) 2021-10-28 2023-05-04 Seepex Gmbh Exzenterschneckenpumpe
US20240139028A1 (en) * 2022-10-31 2024-05-02 Johnson & Johnson Surgical Vision, Inc. Apparatus and method for mechanically coupling a motor to a rotor of a progressive cavity pump

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WO2009024279A1 (fr) 2007-08-17 2009-02-26 Seepex Gmbh Pompe à vis sans fin excentrique à stator segmenté
DE102014112550A1 (de) 2014-09-01 2016-03-03 Seepex Gmbh Exzenterschneckenpumpe
EP3473856A1 (fr) 2017-10-20 2019-04-24 Circor Pumps North America, Llc. Dispositif de démontage pour pompes à cavité progressive

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WO2009024279A1 (fr) 2007-08-17 2009-02-26 Seepex Gmbh Pompe à vis sans fin excentrique à stator segmenté
DE102014112550A1 (de) 2014-09-01 2016-03-03 Seepex Gmbh Exzenterschneckenpumpe
EP3473856A1 (fr) 2017-10-20 2019-04-24 Circor Pumps North America, Llc. Dispositif de démontage pour pompes à cavité progressive

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DE102018102640A1 (de) 2019-08-08
EP3749861A1 (fr) 2020-12-16

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