EP3824162A1 - Carter de pompe - Google Patents

Carter de pompe

Info

Publication number
EP3824162A1
EP3824162A1 EP19718682.8A EP19718682A EP3824162A1 EP 3824162 A1 EP3824162 A1 EP 3824162A1 EP 19718682 A EP19718682 A EP 19718682A EP 3824162 A1 EP3824162 A1 EP 3824162A1
Authority
EP
European Patent Office
Prior art keywords
housing
pump
pump housing
longitudinal axis
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19718682.8A
Other languages
German (de)
English (en)
Other versions
EP3824162B1 (fr
Inventor
Norman Dicks
Marcel Griesdorn
Stephan Mottyll
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
Application filed by Seepex GmbH filed Critical Seepex GmbH
Publication of EP3824162A1 publication Critical patent/EP3824162A1/fr
Application granted granted Critical
Publication of EP3824162B1 publication Critical patent/EP3824162B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning
    • 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
    • F04C15/0065—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
    • 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
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/10—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/107—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/1075—Rotary-piston pumps specially adapted for elastic fluids 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 material, 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw 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
    • 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
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet
    • F04C2250/101—Geometry of the inlet or outlet of the inlet

Definitions

  • the pump housing has a tubular inlet connection oriented transversely to the longitudinal axis of the housing for the supply of a medium to be conveyed (with the pump).
  • the invention relates to an eccentric screw pump with such a pump housing, which is also referred to as a suction housing.
  • a pump housing which is also referred to as a suction housing.
  • Such an eccentric screw pump has a stator and a rotor rotating in the stator, the pump housing described, which is also referred to as a suction housing, being connected to the stator on the suction side.
  • the eccentric screw pump has a drive for the rotor, the drive z.
  • B. drives the rotor via a connecting shaft and a coupling rod.
  • the coupling rod compensates for the eccentric movement of the rotor or the rotor end with respect to the connecting shaft.
  • a shaft seal is provided for liquid-tight sealing of the pump housing from the environment.
  • B. can be designed as a mechanical seal.
  • the housing shell of the pump housing or of the suction housing is preferably cylindrical, at least in regions (essentially), and preferably at least in the region of the inlet connector. In this case, the
  • Such an eccentric screw pump is a pump from the group of rotating positive-displacement pumps, which 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, for. B. also contain solids.
  • the pump housing according to the invention or the eccentric screw pump according to the invention is preferably used as a food pump and consequently preferably for the conveyance of food. It is also known as a hygiene pump and is used wherever clean, sterile and hygienic work is required, especially in the food, pharmaceutical, cosmetic and chemical industries. Such pumps follow high hygiene regulations.
  • a cleaning medium can be pumped through the pump using the operated pump or a separately connected cleaning pump, thereby cleaning the pump and the suction housing.
  • the cleaning medium is consequently supplied through the inlet connection, which also serves to supply the medium to be conveyed during normal operation of the pump, and is conveyed with the rotor through the suction housing and the stator into the region of the pressure connection connected to the stator on the pressure side.
  • CIP clean-in-place flushing
  • the shaft seal eg mechanical seal
  • the inlet connections are connected centrally and consequently in a radial orientation to the cylindrical housing jacket, generally in the area of the mechanical seal, which, for. B. is arranged in the vicinity of the first end opening of the suction housing.
  • the cleaning liquid flowing in through the central inlet connection is divided up when it hits the mechanical seal, so that cleaning liquid also gets into the area below the mechanical seal. Nonetheless, problems can arise during cleaning due to the division due to insufficient underflow of the mechanical seal. The division of the flow can also lead to a stagnation point above the mechanical seal and this can lead to cleaning problems above the mechanical seal.
  • the inlet connector is not centrally / radially oriented, but is connected tangentially to the housing jacket, so that it is not a divided flow, but a continuous flow on one side that flows around the mechanical seal.
  • a housing geometry of a pump housing for an eccentric screw pump is, for. B. is described in DE 10 2008 014 235 A1.
  • DE 292 15 797 U1 a suction housing of an eccentric screw pump of a special design is known.
  • the suction housing has an inlet connection for the medium to be conveyed which is connected to the housing jacket in the radial direction. Additional pipe sockets are for cleaning purposes
  • the cleaning is not carried out via the inlet connection, so that the cleaning medium is not conveyed through the pump even when the pump is operating, but the cleaning medium is conveyed through the special cleaning connection in a special cleaning operation when the rotor is at a standstill.
  • An eccentric screw pump of the usual type is e.g. B. also known from DE 10 2012 001 617 A1.
  • the inlet is connected radially to the housing casing in a conventional manner, specifically in the area of the mechanical seal.
  • the pump is provided with a storage space in the region of the transition to the stator, the storage space being designed to be free of recesses and / or bulges, as a result of which very good cleanability and hygiene are to be achieved, particularly in the field of food technology.
  • the invention is based on the technical problem of creating a pump housing for an eccentric screw pump, in particular for a food pump or hygiene pump of the type described at the outset, which is simple in design with optimized cleaning options distinguished.
  • the invention teaches in the case of a generic pump housing of the type described in the introduction that the geometry of the inlet connection (including its orientation) is designed such that a flow as the medium flows through the inlet connection into the interior of the housing is generated (in the transition between inlet
  • connecting piece and housing shell has an inflow direction which has a radial directional component which is directed outward from the longitudinal axis of the housing and / or an axial directional component which is oriented toward the first end-side (drive-side opening).
  • the invention is based on the knowledge that, in the case of eccentric screw pumps for the food sector or for other areas with the highest hygiene regulations, the cleaning of the pump housing, which is preferably designed as a suction housing, is of particular importance. This applies in particular to a CIP cleaning, in which the cleaning medium is inserted into the pump housing with minimal disassembly or retrofitting work through the inlet connection, which in operation serves to supply the medium to be pumped, and with the rotor through the Pump housing and the stator is conveyed through.
  • the invention first of all comprises embodiments in which the inlet connector is connected to the cylindrical housing jacket centrally with respect to the longitudinal axis of the housing. Preferably, however, the inlet connection is (decentrally) connected tangentially to the housing jacket (essentially) offset to the longitudinal axis of the housing. It always has the geometry according to the invention for generating the flow directions explained.
  • the invention has recognized that cleaning can be optimized by a decentralized connection of the inlet connector and consequently a (substantially) tangential arrangement of the inlet connector.
  • This basically known tangential connection is, however, further optimized according to the invention, namely by a geometry that has an asymmetrical and preferably a “double asymmetrical” flow or inflow into the pump housing and in particular in the area of the mechanical seal
  • the cleaning medium consequently does not flow exactly tangentially through the inlet connector into the interior of the housing, but instead (at the transition from the inlet connector into the interior of the housing) the medium is deflected towards the outer wall of the housing and consequently away from the longitudinal axis of the housing, making it particularly effective Rinsing of the mechanical seal preferably arranged in this area is generated. In this way, the inner wall of the suction housing is cleaned better and the dead space areas below and / or above the mechanical seal that may occur in practice are avoided.
  • the geometry of the inlet connector according to the invention can moreover not only be implemented in the preferred embodiment in which the inlet connector is arranged decentrally offset from the longitudinal axis of the housing, but in conventional embodiments with an inlet connector centrally connected to the housing jacket.
  • the cleaning is consequently optimized according to the invention by the flow, on the one hand, specifically directed outward from the longitudinal axis of the housing and, on the other hand, by the flow directed at the end face of the suction housing, and consequently by a special radial direction component and / or a special axial direction component of the inflow direction of the flow.
  • the geometry according to the invention can in a first embodiment, for.
  • This can be achieved, for example, by the inner cross-sectional area of the inlet connector tapering at least in sections in the direction of the housing shell, ie in the inflow direction, preferably asymmetrically and particularly preferably double asymmetrically.
  • the reduction in the cross section leads to an advantageous increase in the inflow speed and thus to better cleaning results.
  • the outlet cross-section of the inlet connector in the area of the housing shell
  • the output cross-section is asymmetrically offset relative to its input cross-section, with respect to the longitudinal direction of the connecting piece, and preferably in the axial direction towards the first front-side housing opening and / or in the radial direction away from the longitudinal axis of the housing to the outside or to the outer wall of the housing moved there.
  • the output cross section and / or the input cross section is not round, but z. B. are oval or elliptical, but also in the manner described with a reduced output cross-section compared to the input cross-section. After all, others can too
  • Cross-sectional shapes are realized so that an individual adjustment of the geometry is possible.
  • the inlet connector has an inner wall which is of spiral form and thus forms a spiral flow channel and which in turn generates a spiral flow within the inlet connector, so that the medium in the orientation defined according to the invention from the inlet connector to the interior of the Pump housing enters.
  • the orientation of the flow or inflow direction of the medium which is essential to the invention, is consequently realized in this embodiment by a spiral-shaped inner wall of the inlet connector.
  • the inlet connector is directly geometrically designed in the manner described, i. H. the inlet connector itself is realized with the asymmetrical cross-sectional taper described or with the spiral configuration described.
  • the pump housing is consequently made available directly with the geometry according to the invention in the course of production.
  • the pump housing is preferably made of stainless steel. Alternatively, it can also be made of cast steel. In addition, embodiments made of plastic can also be considered as an alternative.
  • the nozzle insert can, for. B. made of stainless steel, cast steel or alternatively also made of plastic.
  • the invention also relates to an eccentric screw pump with a pump housing of the type described.
  • an eccentric screw pump has, in addition to the pump housing / suction housing, at least one stator connected to the second front opening of the pump housing, a rotor arranged in the stator, a coupling rod arranged in the pump housing and a drive which is connected to the coupling rod via a connecting shaft.
  • the drive consequently drives the rotating unit, which consists of the rotor and coupling rod, via the connecting shaft.
  • the coupling rod can z. B. in a generally known manner via joints on the one hand the rotor and on the other hand the connecting shaft. Easily mountable joints are preferred for improved cleaning.
  • classic joints can also be dispensed with in the transition areas between the connecting shaft and coupling rod on the one hand and coupling rod and rotor on the other.
  • a flexible or flexible coupling rod possible, for. B. made of a titanium material.
  • a flexible coupling rod can also be directly connected in one piece to the rotor.
  • a shaft seal e.g. B. Mechanical seal, provided for the sealing of the suction housing.
  • the inlet connector is arranged in the area of the shaft seal, ie it opens in the area of the shaft seal.
  • the pump housing or the pump additionally has one or more bypass openings or bypass connections .
  • the pump housing which is designed as a suction housing, can have a first bypass connection near the second end opening and consequently on the stator side, which is also oriented transversely to the longitudinal direction of the housing.
  • Another housing is connected to the end of the stator opposite the suction housing. B. is referred to as a pressure port.
  • This pressure connector can have a second bypass connector, which is also oriented transversely to the longitudinal direction of the housing, the two bypass connectors being able to be connected to one another via a bypass line.
  • bypass serves to guide excess cleaning medium, which is not conveyed through the stator chambers, from the suction housing into the pressure housing. It is important that these bypass nozzles do not serve the separate supply of a cleaning medium, but are used in the course of cleaning by pump operation with a rotating rotor, the cleaning medium being carried out via the inlet nozzle.
  • the invention also relates to a method for cleaning an eccentric screw pump of the type described.
  • This method is characterized in that, with the rotatingly driven rotor, a cleaning medium is pumped through the stator from the inlet nozzle via the suction housing, one washing around the mechanical seal Flow generated
  • FIG. 2 schematically simplified a first section through an eccentric screw pump in the area of the inlet connector, FIG. 3 a second section through the object according to FIG. 2,
  • FIG. 4 shows a simplified top view of the object according to FIG. 2,
  • FIG. 6 shows a second embodiment of an eccentric screw pump according to the invention
  • FIG. 7 shows a section A-A through the object according to FIGS. 6 and
  • FIG. 8 shows a section BB through the object according to FIG. 6.
  • an eccentric screw pump is shown in simplified form, which basically has a stator 1, a rotor 2 rotating in the stator 1 and a drive 3 for the rotor.
  • a pump housing 4 which is referred to as a suction housing 4, is connected to the stator 1 on the suction side.
  • a housing part connected on the pressure side to the stator 1 is, for. B. referred to as a connecting piece or pressure port 15.
  • the pump housing 4 has a housing jacket 5 which extends along the longitudinal axis L of the housing and which is cylindrical in the exemplary embodiment, so that the longitudinal axis L of the housing forms the cylinder axis L.
  • connection shaft 8 is connected to the drive 3, which drives the rotor 2 via a coupling rod 9, the coupling rod 9 compensating for the eccentric movement of the rotor 2 or the rotor end with respect to the centrically rotating connection shaft 8. This is possible via joints or a flexible coupling rod. Details are not shown.
  • the pump housing 4 has a first end opening 6 on the drive side, which is sealed via a shaft seal 7 for the connecting shaft 8. Furthermore, the pump housing 4 has a second end opening 10 on the stator side, to which the stator 1 is connected.
  • the pump housing 4 has a tubular inlet connection 11 for supplying the medium to be conveyed, which is oriented transversely to the longitudinal axis of the housing or the cylinder axis L and is connected to the housing jacket 5. This inlet connection 11 is decentralized and consequently offset to the housing longitudinal axis L in a substantially tangential orientation to the housing jacket 5.
  • the medium to be pumped is supplied via the inlet connection 11 and pumped through the stator 1 into the region of the pressure connection 15 via the suction housing 4 or its second opening 10.
  • a cleaning medium is supplied via the inlet connection 11 in the cleaning mode, which is also conveyed by the rotating rotor 2 when the pump is operating.
  • the cleaning medium can also be pumped through the pump shown with a separately connected cleaning pump.
  • the already mentioned decentralized, tangential connection of the inlet connector 11 to the housing jacket 5 leads to an optimized washing around the mechanical seal 7 and thus to an improved cleaning of the areas below and / or above the mechanical seal 7.
  • the geometry of the inlet connector is now not only tangent tially designed, but it is designed such that in the course of the inflow of the medium or cleaning medium through the inlet port 11 into the interior of the housing, a flow is generated which has an inflow direction R, which is directed outward from the longitudinal housing L , radial directional component R1 and also has an axial directional component R2 which is executed towards the first end opening 6.
  • the inflow direction R is the direction of the flow S of the medium in the region of the transition from the inlet connection 11 into the housing interior or to the housing jacket 5.
  • the inflow direction R is directed outward relative to the conventional tangential (or vertical) orientation N, so that the radial direction component R1 results.
  • This outward flow direction R of the flow S which is directed towards the inside of the housing shell, leads to improved washing around the mechanical seal 7 and thus to an improved cleaning of the inner wall of the housing shell 5. In addition, dead space areas below and above the mechanical seal 7 are avoided.
  • a flow S which is directed towards the end-side opening 6 and consequently opposite the main flow direction H in the housing is generated.
  • FIG. 2 shows that the flow S or inflow direction R has an axial direction component R2, which is directed toward the first end opening 6 and is consequently opposite to the main flow direction H of the pump.
  • the conventional orientation is also indicated in FIG. 2 by the reference symbol N, so that it can be seen that the inflow direction R is oriented toward the end face of the suction housing 4 with respect to this conventional, vertical direction N. This results in the axial direction component R2 shown in FIG. 2.
  • This deflection of the flow S in the axial direction against the mechanical seal 7 leads to improved cleaning of the end face of the suction housing 4 facing away from the stream.
  • the wall areas below and / or above the mechanical seal 7 are also better washed.
  • FIG. 5a shows an embodiment in which the inlet connector is connected to FIG. 4 on the other side of the housing with respect to the longitudinal axis L, so that the embodiment according to FIG.
  • FIG. 5a is preferably used for a direction of rotation of the pump that is opposite to FIG. 4.
  • the embodiment according to FIG. 5b differs from that according to FIG. 5a in particular by a different dimensioning of the cross-sectional taper.
  • 5a and 5b show embodiments with round cross sections
  • FIG. 5c shows a modified embodiment with a non-round cross section, e.g. B. an oval or elliptical cross section
  • 5d shows an optional embodiment with a variably adapted cross section of the inlet connector.
  • FIG. 6 to 8 show a modified embodiment of the invention, in which the asymmetrical flow S or R according to the invention is generated by a special inlet connection 11 which has a spiral-shaped inner wall which forms a spiral flow channel 14, so that within the inlet connection 11 a spiral flow is generated, which in the manner described with radial direction components R1 and
  • axial direction component R2 enters the housing interior.
  • This embodiment also allows the inflow essential to the invention to be improved for improved cleaning.
  • two bypass connections 12, 13 are provided in the embodiment according to FIGS. 6 to 8, which can be connected to one another with a bypass line, not shown.
  • the first bypass connection 12 is connected to the suction housing 4, specifically in the vicinity of the second end opening 10 of the suction housing 4.
  • the second bypass connection 13 is connected to the pressure connection 15.
  • the cleaning medium for cleaning the pump is also supplied in the embodiment according to FIGS. 6 to 8 via the inlet connection 11 and is conveyed through the pump by means of the rotor 2 during operation of the pump.
  • the cleaning medium can be conveyed back to the first bypass connection 12 via the second bypass connection 13 and the bypass line, not shown, and thus a particularly efficient cleaning of the pump and in particular the stator can be realized.
  • This embodiment with bypass connection can be realized in the same way in the embodiment according to FIGS. 1 to 5, i. H. a bypass nozzle 12, 13 or both bypass nozzles 12, 13 can be designed geometrically as described in connection with the inlet nozzle 11.
  • the geometric configuration of the inlet connector 11 explained in the description and in the claims consequently also relates, in an optional further development of the invention, to one or more bypass connectors which may be provided.
  • the pump housing or suction housing 4 consists of several parts, eg. B. can be formed in two parts
  • the inlet connection 11 is arranged offset in relation to the longitudinal axis L of the pump.
  • the geometry of the inlet connector 11 according to the invention can also be implemented in a variant, not shown, in which the inlet connector is oriented centrally with respect to the longitudinal axis L.
  • the cross-sectional taper shown in the figures can be realized. The same applies to the possibility of a spiral flow channel.

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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)

Abstract

Carter de pompe (4) pour une pompe à vis excentrée, comprenant une enveloppe de carter (5) s'étendant le long d'un axe longitudinal de carter (L), une première ouverture frontale (6), à laquelle une garniture d'arbre (7) pour un arbre de liaison (8) peut être connectée, et une deuxième ouverture frontale (10), à laquelle un stator (I) peut être connecté, et un raccord d'entrée (11) tubulaire orienté perpendiculairement à l'axe longitudinal de carter (L) pour l'alimentation d'un liquide à pomper, lequel est raccordé tangentiellement à l'enveloppe de carter (5), décalé par rapport à l'axe longitudinal de carter (L). La géométrie du raccord d'entrée (11) est conçue de telle façon qu'un flux est généré lors de l'introduction du liquide dans l'intérieur du carter à travers le raccord d'entrée (11), lequel comprend une composante de direction radiale (R1) orientée vers l'extérieur en éloignement de l'axe longitudinal de carter (L) et/ou une composante de direction radiale (R2) orientée vers la première ouverture frontale (6).
EP19718682.8A 2018-07-18 2019-04-17 Carter de pompe Active EP3824162B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018117374.1A DE102018117374A1 (de) 2018-07-18 2018-07-18 Pumpengehäuse
PCT/EP2019/059925 WO2020015873A1 (fr) 2018-07-18 2019-04-17 Carter de pompe

Publications (2)

Publication Number Publication Date
EP3824162A1 true EP3824162A1 (fr) 2021-05-26
EP3824162B1 EP3824162B1 (fr) 2023-10-04

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ID=66240137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19718682.8A Active EP3824162B1 (fr) 2018-07-18 2019-04-17 Carter de pompe

Country Status (4)

Country Link
US (1) US11441560B2 (fr)
EP (1) EP3824162B1 (fr)
DE (1) DE102018117374A1 (fr)
WO (1) WO2020015873A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE370281C (de) * 1923-03-01 Fried Krupp Akt Ges Lagerung einer Schnecke zum Foerdern von Schuettgut, insbesondere Muell o. dgl.
DE8212381U1 (de) * 1982-04-29 1989-11-23 Armatec FTS-Armaturen GmbH & Co KG, 7988 Wangen Exzenterschneckenpumpe
SE459877B (sv) * 1983-09-16 1989-08-14 Hans Baeckstroem Anordning foer transport av med fasta foeremaal foerorenade vaetskor daer pumprotorn aer av roterande deplacementstyp
DE3818508A1 (de) 1988-05-31 1989-12-07 Netzsch Mohnopumpen Gmbh Exzenterschneckenpumpe in sterilisierbarer ausfuehrung
DE29715797U1 (de) 1997-09-03 1998-01-08 Pumpenfabrik Wangen GmbH, 88239 Wangen Sauggehäuse für Exzenterschneckenpumpen mit tangentialen Reinigungs-/Inspektionsöffnungen zur Erzeugung turbulenter Rohrströmungen für Reinigungszwecke
DE19812154A1 (de) * 1998-03-20 1999-09-23 Reburg Patentverwertungs Gmbh Vorrichtung zum Mischen und Fördern von Stoffgemischen
JP3891924B2 (ja) * 2002-01-11 2007-03-14 泰 小林 液体容器の液体ディスペンサー
EP1970569A1 (fr) 2007-03-16 2008-09-17 Knoll Maschinenbau Gmbh Pompe à vis sans fin excentrique dotée d'un boîtier de pompe
DE102010034032B4 (de) * 2010-08-11 2013-02-07 M-Tec Mathis Technik Gmbh Pumpe zum Fördern von abbindendem Material
DE102012001617A1 (de) 2012-01-30 2013-08-01 Netzsch Pumpen & Systeme Gmbh Vorrichtung zum Fördern von Medien
DE102013111716B3 (de) * 2013-10-24 2015-03-19 Netzsch Pumpen & Systeme Gmbh Exzenterschneckenpumpe und Verwendung einer Exzenterschneckenpumpe

Also Published As

Publication number Publication date
DE102018117374A1 (de) 2020-01-23
US20210140428A1 (en) 2021-05-13
EP3824162B1 (fr) 2023-10-04
US11441560B2 (en) 2022-09-13
WO2020015873A1 (fr) 2020-01-23

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