EP3824162B1 - Carter de pompe - Google Patents

Carter de pompe Download PDF

Info

Publication number
EP3824162B1
EP3824162B1 EP19718682.8A EP19718682A EP3824162B1 EP 3824162 B1 EP3824162 B1 EP 3824162B1 EP 19718682 A EP19718682 A EP 19718682A EP 3824162 B1 EP3824162 B1 EP 3824162B1
Authority
EP
European Patent Office
Prior art keywords
housing
connecting piece
pump
pump housing
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.)
Active
Application number
EP19718682.8A
Other languages
German (de)
English (en)
Other versions
EP3824162A1 (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

Images

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 invention relates to a pump housing for an eccentric screw pump.
  • the pump housing has a jacket extending along a longitudinal axis of the housing and a first (drive-side) front opening to which a shaft seal for a connecting shaft can be connected, as well as a second (stator-side) front opening to which a stator can be connected.
  • the pump housing has a tubular inlet connection oriented transversely to the longitudinal axis of the housing for supplying a medium to be pumped (with the pump).
  • the invention also 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 being connected to the stator on the suction side, which is also referred to as the suction housing.
  • 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 end of the rotor relative to the connecting shaft.
  • a shaft seal is provided, which z. B. can be designed as a mechanical seal.
  • the housing jacket of the pump housing or the suction housing is preferably (essentially) cylindrical in at least some areas, preferably at least in the area of the inlet connection. In this case, the longitudinal axis of the housing corresponds to the cylinder
  • Such an eccentric screw pump is a pump from the group of rotating positive displacement pumps that are used to pump 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 pump housing according to the invention or the eccentric screw pump according to the invention is preferably used as a food pump and therefore preferably used for conveying 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, cosmetics and chemical industries. Such pumps follow strict hygiene regulations.
  • a cleaning medium is conveyed through the pump with the operated pump or a separately connected cleaning pump and thus the pump and also the suction housing are cleaned.
  • the cleaning medium is therefore supplied through the inlet port, which in normal operation of the pump also serves to supply the medium to be pumped, and is conveyed with the rotor through the suction housing and the stator into the area of the pressure port connected to the stator on the pressure side.
  • CIP clean-in-place flushing
  • detachment areas and dead space areas close to the wall are critical in eccentric screw pumps, which can impair cleaning.
  • Particularly critical in practice can be, for example, b. be the area of the housing in which the shaft seal (e.g. mechanical seal) is arranged.
  • the inlet ports are connected centrally and consequently in a radial orientation to the cylindrical housing jacket, usually in the area of the mechanical seal, which z. B. is arranged near the first front opening of the suction housing.
  • the cleaning liquid flowing in through the central inlet connection is divided when it hits the mechanical seal, so that cleaning liquid also reaches the area below the mechanical seal.
  • problems can arise during cleaning due to the division due to insufficient flow under the mechanical seal.
  • the division of the flow can also lead to a stagnation point above the mechanical seal and this can lead to problems with cleaning even above the mechanical seal.
  • a suction housing of an eccentric screw pump is known in a special design.
  • the suction housing has an inlet connection for the medium to be pumped, which is connected in the radial direction to the housing jacket.
  • the cleaning does not take place via the inlet port, so that the cleaning medium is not conveyed through the pump itself during operation of the pump, but rather the cleaning medium is conveyed through the special cleaning port in a special cleaning operation when the rotor is at a standstill.
  • An eccentric screw pump of the usual design is e.g. B. also from the DE 10 2012 001 617 A1 known.
  • the inlet is connected radially to the housing jacket in a conventional manner, specifically in the area of the mechanical seal.
  • the pump is provided with a storage space in the area of the transition to the stator, whereby the storage space should be designed without recesses and/or bulges, which means that very good cleanability and hygiene should be achieved, especially 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 above, which is characterized by optimized cleaning options with a simple construction.
  • the invention teaches in a generic pump housing of the type described above that the geometry of the inlet connection (including its orientation) is designed such that as the medium flows through the inlet connection into the interior of the housing, a flow is generated which (in the transition between inlet ports and housing jacket) has an inflow direction which has a radial directional component directed outwards from the longitudinal axis of the housing and/or an axial directional component directed towards the first front-side (drive-side opening).
  • the invention is based on the knowledge that in 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 CIP cleaning, in which the cleaning medium is introduced into the pump housing with minimal dismantling or conversion work through the inlet connection, which during operation is used to supply the medium to be pumped, and with the rotor through the pump housing and the stator is conveyed through.
  • the invention initially includes embodiments in which the inlet connection is connected to the cylindrical housing jacket centrally with respect to the longitudinal axis of the housing. However, the inlet connection is preferably connected (decentrally) offset to the longitudinal axis of the housing (essentially) tangentially to the housing jacket. It always has the geometry according to the invention to generate the flow directions explained.
  • the invention has recognized that cleaning can be optimized by a decentralized connection of the inlet connection and consequently a (substantially) tangential arrangement of the inlet connection.
  • this fundamentally known tangential connection is further optimized according to the invention, namely by a geometry that provides an asymmetrical and preferably a "double asymmetrical" flow or inflow into the pump housing and in particular in the area of the mechanical seal generated.
  • the cleaning medium therefore does not flow exactly tangentially through the inlet port into the interior of the housing, but rather (at the transition from the inlet port to 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, so that a particularly effective Flushing around the mechanical seal preferably arranged in this area is generated.
  • the inflow is additionally aligned, which is directed towards the end face of the suction housing facing away from the current and consequently towards the frontal first opening of the suction housing, so that the end face of the suction housing is better cleaned and also the wall areas below the mechanical seal and the sealing points between the mechanical seal and suction housing be better washed.
  • the geometry of the inlet port according to the invention can also be implemented not only in the preferred embodiment, in which the inlet port is arranged decentrally offset from the longitudinal axis of the housing, but also in conventional embodiments with the inlet port connected centrally to the housing jacket.
  • the cleaning is therefore optimized according to the invention by the flow directed specifically outwards from the longitudinal axis of the housing and, on the other hand, by the flow directed towards the end face of the suction housing, and consequently by a special radial directional component and/or a special axial directional component of the inflow direction of the flow.
  • These two measures can be implemented independently of one another and preferably in combination.
  • high levels are achieved Flow velocities or high velocity gradients on the wall are achieved, which lead to a significant reduction in dead space areas and improved cleaning of the wall areas.
  • the geometry according to the invention can be used in a first embodiment, for. B. realized in that the inner cross-sectional area of the inlet connection tapers at least in sections in the direction of the housing jacket, ie in the inflow direction, preferably asymmetrically and particularly preferably doubly asymmetrically. Reducing the cross section leads to an advantageous increase in the inflow velocity and thus to better cleaning results. This can be done e.g. B. the output cross section of the inlet connection (in the area of the housing jacket) can be reduced relative to its inlet cross section.
  • the output cross section is asymmetrically offset relative to its input cross section - based on the longitudinal direction of the nozzle, 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 outwards or towards the outer housing wall . Due to the described asymmetrical offset of the output cross section relative to the input cross section of the inlet connection, the flow according to the invention can be realized with the mentioned radial directional component and/or the mentioned axial directional component. Both the output cross section and the input cross section (in a top view of the nozzle) can be round, but with different diameters.
  • the output cross section and/or the input cross section is not round, but rather 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 can be realized so that individual adjustment of the geometry is possible.
  • the inlet port has a spiral-shaped inner wall and thus forms a spiral-shaped flow channel, which in turn generates a spiral-shaped flow within the inlet port, so that the medium enters the interior of the pump housing from the inlet port in the orientation defined according to the invention .
  • the orientation of the flow or inflow direction of the medium which is essential to the invention, is therefore realized in this embodiment by a spiral-shaped inner wall of the inlet connection.
  • the inlet connection is designed geometrically in the manner described, i.e. H. the inlet port itself is realized with the asymmetrical cross-sectional taper described or with the spiral-shaped design described.
  • the pump housing is therefore made available directly with the geometry according to the invention during production.
  • the pump housing is preferably made of stainless steel. Alternatively, it can also be made from cast steel. Alternatively, embodiments made of plastic can also be considered.
  • a specially designed nozzle insert that can be inserted into a (conventional) cylindrical pipe nozzle/inlet nozzle and thus provides the geometry that generates the flow essential to the invention.
  • a separately manufactured nozzle insert can e.g. b. can also be used when retrofitting a pump with a classic tangentially connected cylindrical pipe socket.
  • the nozzle insert can e.g. B. made of stainless steel, cast steel or alternatively made of plastic.
  • the invention also relates to an eccentric screw pump with a pump housing of the type described.
  • Such an eccentric screw pump has, in a fundamentally known manner, 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, an in The coupling rod arranged in the pump housing and a drive which is connected to the coupling rod via a connecting shaft.
  • the drive therefore drives the rotating unit, which consists of a rotor and coupling rod, via the connecting shaft.
  • the coupling rod can z. B. be connected in a generally known manner via joints to the rotor on the one hand and the connecting shaft on the other. Easy-to-assemble joints are preferably used for improved cleaning.
  • classic joints can be dispensed with in the transition areas between the connecting shaft and coupling rod on the one hand and the coupling rod and rotor on the other.
  • the use of a flexible or flexible coupling rod is possible, e.g. B. made of a titanium material.
  • a flexible coupling rod can also be directly connected in one piece to the rotor.
  • a shaft seal within the pump housing in the area of the (drive-side) front opening, e.g. B. mechanical seal, provided for sealing the suction housing.
  • the inlet port is arranged in the area of the shaft seal, ie it opens into the area of the shaft seal into the housing casing, so that the shaft seal is protected from the medium to be conveyed, e.g. B. cleaning medium is washed around.
  • the pump housing or the pump additionally has one or more bypass openings or bypass ports.
  • the pump housing which is designed as a suction housing, can have a first bypass connection near the second front 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, which z. B. is referred to as a pressure port.
  • This pressure port can have a second bypass port, which is also oriented transversely to the longitudinal direction of the housing, whereby the two bypass ports can be connected to one another via a bypass line.
  • bypass serves to direct excess cleaning medium that is not conveyed through the stator chambers from the suction housing into the pressure housing. It is important that these bypass connections do not serve to supply a cleaning medium separately, but are used in the course of cleaning by pump operation with a rotating rotor, with the cleaning medium being supplied via the inlet connection.
  • the invention also relates to a method for cleaning an eccentric screw pump of the type described.
  • This method is characterized in that a cleaning medium is pumped from the inlet port via the suction housing through the stator with the rotatingly driven rotor, a flow flowing around the mechanical seal being generated whose inflow direction has, in the manner according to the invention, a radial directional component directed outwards from the longitudinal axis of the housing and/or an axial directional component directed towards the first front-side opening (and consequently a directional component opposite to the main flow direction).
  • an eccentric screw pump is shown in simplified form, which in its basic structure 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 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 z. B. referred to as a connecting piece or pressure piece 15.
  • the pump housing 4 has a housing jacket 5 which extends along the housing longitudinal axis L and is cylindrical in the exemplary embodiment, so that the housing longitudinal axis L forms the cylinder axis L.
  • a connecting shaft 8 is connected to the drive 3 and 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 relative to the centrally rotating connecting shaft 8. This is possible using joints or a flexible coupling rod. Details are not shown.
  • the pump housing 4 has a first front 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 front 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 pumped, which is oriented transversely to the longitudinal axis of the housing or cylinder axis L and is connected to the housing jacket 5. This inlet connection 11 is connected to the housing jacket 5 in a decentralized manner and consequently offset from the longitudinal axis L of the housing in a substantially tangential orientation.
  • the medium to be conveyed is supplied via the inlet connection 11 and pumped via the suction housing 4 or its second opening 10 through the stator 1 into the area of the pressure connection 15.
  • a cleaning medium is supplied via the inlet connection 11 during cleaning operation, which is also conveyed by the rotating rotor 2 during operation of the pump.
  • the cleaning medium can also be conveyed through the pump shown using a separately connected cleaning pump.
  • the already mentioned decentralized, tangential connection of the inlet connection 11 to the housing jacket 5 leads to an optimized flushing around the mechanical seal 7 and thus to improved cleaning of the areas below and / or above the mechanical seal 7.
  • the geometry of the inlet connection is now not only tangential , but it is designed in such a way that in the course of the medium or cleaning medium flowing in through the inlet connection 11 into the interior of the housing, a flow is generated which has an inflow direction R, which has a radial directional component R1 directed outwards from the longitudinal axis L of the housing and also has an axial directional component R2 directed towards the first front opening 6. This is done on the Fig. 2 and 3 referred.
  • the inflow direction R is the direction of the flow S of the medium in the area of the transition from the inlet connection 11 into the interior of the housing or onto the housing jacket 5.
  • a flow S is generated which is directed towards the front opening 6 and is therefore opposite to the main flow direction H in the housing.
  • the flow S or inflow direction R has an axial directional component R2 directed towards the first front opening 6, which is therefore opposite to the main flow direction H of the pump.
  • the conventional orientation is indicated by the reference number N, so that it can be seen that the inflow direction R is aligned with respect to this conventional, vertical direction N towards the end face of the suction housing 4.
  • 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 current.
  • the wall areas below and/or above the mechanical seal 7 are also better washed.
  • Figs. 5a, 5b, 5c and 5d show modifications of the embodiment Fig. 4 .
  • Fig. 5a shows an embodiment in which the inlet port opposite Fig. 4 on the other side of the housing relative to the longitudinal axis L is connected, so that the embodiment according to Fig. 5a preferred for one opposite Fig. 4 reverse direction of rotation of the pump is used.
  • the embodiment according to Fig. 5b differs from that according to 5a in particular by a different dimensioning of the cross-sectional taper.
  • the Fig. 4 , 5a and 5b Show embodiments with round cross sections Fig. 5c a modified embodiment with a non-round cross section, e.g. B. an oval or elliptical cross section.
  • Fig. 5d shows an optional embodiment with a variably adapted cross section of the inlet connection.
  • 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 port 11, which has a spiral-shaped inner wall which forms a spiral-shaped flow channel 14, so that a spiral-shaped flow is generated within the inlet port 11 , in the manner described with radial directional components R1 and axial directional component R2 enters the interior of the housing.
  • This embodiment also makes it possible to realize the inflow essential to the invention for improved cleaning.
  • two bypass connections 12, 13 are provided, 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 front opening 10 of the suction housing 4.
  • the second bypass connection 13 is connected to the pressure connection 15.
  • the cleaning medium is also used to clean the pump in the embodiment Fig. 6 to 8 supplied via the inlet connection 11 and conveyed through the pump by means of the rotor 2 during operation of the pump. However, 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 achieved.
  • the pump housing or suction housing 4 is made up of several parts, e.g. B. can be designed in two parts and can have two housing sections 4a, 4b arranged one behind the other in the axial direction.
  • the invention only shows one embodiment in which the inlet connection 11 is arranged offset decentrally relative to the longitudinal axis L of the pump.
  • the geometry of the inlet connection 11 according to the invention can also be implemented in a variant, not shown, in which the inlet connection is oriented centrally with respect to the longitudinal axis L. Even in such an embodiment z. B. the cross-sectional taper shown in the figures can be realized. The same applies to the possibility of a spiral-shaped flow channel.

Claims (12)

  1. Corps de pompe (4) pour une pompe à vis excentrée,
    avec une enveloppe de corps (5) s'étendant le long d'un axe longitudinal de corps (L),
    avec une première ouverture frontale (6) à laquelle peut être raccordée une garniture d'étanchéité d'arbre (7) pour un arbre de liaison (8) et avec une deuxième ouverture frontale (10) à laquelle peut être raccordé un stator (1) et
    avec une tubulure d'admission (11) de forme tubulaire orientée transversalement à l'axe longitudinal de corps (L) pour l'acheminement d'un milieu à transporter,
    sachant que la géométrie de la tubulure d'admission (11) est configurée de telle manière qu'au cours de l'écoulement affluant du milieu à travers la tubulure d'admission (11) à l'intérieur du corps, un écoulement (S) est produit, qui comporte une direction d'écoulement affluant (R) avec un composant directionnel (R1) radial dirigé en éloignement vers l'extérieur de l'axe longitudinal de corps (L) et un composant directionnel (R2) axial dirigé vers la première ouverture frontale (6),
    caractérisé en ce que
    la surface de section intérieure de la tubulure d'admission (11) se rétrécit au moins par endroits en direction de l'enveloppe de corps (5), sachant que la section de sortie (11a) de la tubulure d'admission (11) est réduite et décalée de façon asymétrique par rapport à la section d'entrée (11b) de celle-ci,
    ou
    en ce que la tubulure d'admission (11) comporte une paroi intérieure constituée en forme de spirale et formant un conduit d'écoulement (14) en forme de spirale, qui produit un écoulement en forme de spirale.
  2. Corps de pompe selon la revendication 1, caractérisé en ce que l'enveloppe de corps (5) est constituée pour l'essentiel de façon cylindrique au moins dans la zone de la tubulure d'admission (11).
  3. Corps de pompe selon la revendication 1 ou 2, caractérisé en ce que la section de sortie (11a) de la tubulure d'admission (11) est décalée par rapport à la section d'entrée (11b) de celle-ci en direction axiale par rapport à la première ouverture de corps frontale et/ou en direction radiale de l'axe longitudinal de corps en éloignment vers l'extérieur.
  4. Corps de pompe selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la tubulure d'admission (11) est raccordée tangentiellement à l'enveloppe de corps (5) de façon décalée par rapport à l'axe longitudinal de corps (L).
  5. Corps de pompe selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le corps de pompe (4) est constitué sous la forme d'un corps divisé avec deux sections de corps (4a, 4b) disposées l'une derrière l'autre en direction axiale.
  6. Corps de pompe selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le corps de pompe (4) comporte en plus dans la zone attribuée à la deuxième ouverture (10) frontale une première tubulure de dérivation (12) orientée transversalement à la direction longitudinale du corps (L).
  7. Corps de pompe selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la tubulure d'admission (11) comporte une tubulure symétrique raccordée à l'enveloppe de corps (5) dans laquelle est inséré un embout de tubulure constitué de façon asymétrique en formant la géométrie produisant l'écoulement.
  8. Corps de pompe selon la revendication 7, caractérisé en ce que l'embout de tubulure est inséré de façon amovible dans la tubulure.
  9. Pompe à vis excentrée avec un corps de pompe (4) selon l'une quelconque des revendications 1 à 8 et avec au moins
    - un stator (1) raccordé à la deuxième ouverture (10),
    - un rotor (2) disposé dans le stator (1),
    - une barre d'accouplement (9) disposée dans le corps de pompe (4),
    - un système d'entraînement (3), qui est raccordé par un arbre de liaison (8) à la barre d'accouplement (9),
    - une garniture d'étanchéité d'arbre (7) pour l'arbre de liaison (8) disposée au moins par endroits dans le corps de pompe (4) et raccordée à la première ouverture frontale (6),
    caractérisée en ce que la tubulure d'admission (11) débouche dans une zone de la garniture d'étanchéité d'arbre (7) dans l'enveloppe de corps (5) de telle manière que la garniture d'étanchéité d'arbre (7) est baignée par un écoulement par le milieu à transporter, qui comporte une direction d'écoulement affluant avec un composant directionnel radial dirigé en éloignement vers l'extérieur de l'axe longitudinal de corps (L) et un composant directionnel axial dirigé vers une des premières ouvertures frontales.
  10. Pompe à vis excentrée selon la revendication 9, caractérisée en ce que la garniture d'étanchéité d'arbre (7) est constituée comme une garniture d'étanchéité annulaire coulissante.
  11. Pompe à vis excentrée selon la revendication 9 ou 10, caractérisée en ce que le corps de pompe (4) comporte en plus dans la zone attribuée à la deuxième ouverture (10) frontale une première tubulure de dérivation (12) orientée transversalement à la direction longitudinale du corps (L) et en ce qu' à l'extrémité du stator (1) opposée au corps de pompe (4) est raccordée une tubulure de pression (15), qui comporte une deuxième tubulure de dérivation (13) orientée transversalement à la direction longitudinale de corps, sachant que le milieu à transporter peut être redirigé de la sortie à l'entrée de stator par le biais d'une conduite de dérivation disposée entre les tubulures de dérivation (12, 13).
  12. Procédé de nettoyage d'une pompe à vis excentrée selon la revendication 11, caractérisé en ce qu'un milieu de nettoyage est pompé avec le rotor (2) entraîné en rotation de la tubulure d'admission (11) à travers le corps de pompe (4) et le stator (1), sachant qu'un écoulement baignant la garniture d'étanchéité annulaire coulissante est produit, qui comporte une direction d'écoulement affluant avec un composant directionnel (R1) radial dirigé en éloignement vers l'extérieur de l'axe longitudinal de corps (L) et/ou un composant directionnel axial dirigé vers la première ouverture frontale.
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 EP3824162A1 (fr) 2021-05-26
EP3824162B1 true EP3824162B1 (fr) 2023-10-04

Family

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 (fr) * 1982-04-29 1989-11-23 Armatec Fts-Armaturen Gmbh & Co Kg, 7988 Wangen, De
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 Wangen Pumpen 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
US20210140428A1 (en) 2021-05-13
DE102018117374A1 (de) 2020-01-23
US11441560B2 (en) 2022-09-13
WO2020015873A1 (fr) 2020-01-23
EP3824162A1 (fr) 2021-05-26

Similar Documents

Publication Publication Date Title
DE2025883A1 (de) Reinigungsvorrichtung für permeable Filter
DE102012006025B3 (de) Bolzengelenk für Exzenterschneckenpumpe
EP0509218B1 (fr) Pompe à engrenages
EP2884046A1 (fr) Pompe de tiroir-navette
EP2160965A1 (fr) Pompe à vis sans fin excentrique
EP2016287B1 (fr) Machine a piston rotatif
DE102015109395A1 (de) Selbstreinigende Pumpe
DE102009055945B4 (de) Flügelzellenpumpe
DE102015003224B4 (de) Selbstansaugende Pumpe
EP3824162B1 (fr) Carter de pompe
EP2707629B1 (fr) Dispositif d'étanchéification d'une chambre de pompage d'une pompe à piston tournant, et pompe à piston tournant dotée de ce dispositif
DE102005039612A1 (de) Exzenterschneckenpumpe mit einem Pumpengehäuse
EP0013942B1 (fr) Pompe centrifuge pour liquides contenant des matières solides
EP0713974B1 (fr) Pompe moineau
DE102005039618A1 (de) Wellenschnittstelle
EP2295800A2 (fr) Pompe à vis sans fin excentrique
DE2736590A1 (de) Exzenterschneckenpumpe mit konischer schneckenwelle und gehaeuse-einsatz
EP3092410A1 (fr) Pompe à vis excentrique, accouplement à pivot et procédé de production d'un accouplement à pivot
EP3967881B1 (fr) Pompe
EP1970569A1 (fr) Pompe à vis sans fin excentrique dotée d'un boîtier de pompe
EP3441619A1 (fr) Pompe centrifuge
DE2230773A1 (de) Verdraengermaschine
DE102008042233A1 (de) Exzenterschneckenpumpe sowie mechanisches Koppelelement für die Exzenterschnecke einer Exzenterschneckenpumpe
DE102017100540A1 (de) Exzenterschneckenpumpe
EP4098842A1 (fr) Pompe à anneau oscillant pour produits alimentaires

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20201208

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230601

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502019009555

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20231004

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231004

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231004