EP3924605B1 - Rotary piston pump having a filter - Google Patents

Rotary piston pump having a filter Download PDF

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Publication number
EP3924605B1
EP3924605B1 EP20703223.6A EP20703223A EP3924605B1 EP 3924605 B1 EP3924605 B1 EP 3924605B1 EP 20703223 A EP20703223 A EP 20703223A EP 3924605 B1 EP3924605 B1 EP 3924605B1
Authority
EP
European Patent Office
Prior art keywords
gas
housing
filter
rotary piston
piston pump
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
EP20703223.6A
Other languages
German (de)
French (fr)
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EP3924605A1 (en
Inventor
Frank Diedrichsen
Marcel Küthe-Schleifenbaum
Dirk Wallat-Thaler
Henryk WANIEK
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Gebr Becker GmbH
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Gebr Becker GmbH
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Publication of EP3924605A1 publication Critical patent/EP3924605A1/en
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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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
    • 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
    • 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
    • F01C21/007—General arrangements of parts; Frames and supporting elements
    • 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
    • F04C18/12—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 other than internal-axis type
    • F04C18/123—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 other than internal-axis type with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—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
    • F04C2230/00—Manufacture
    • F04C2230/85—Methods for improvement by repair or exchange of parts
    • 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
    • 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 rotary piston pump according to the features of the preamble of claim 1.
  • Rotary piston pumps in particular claw pumps, are known.
  • a gas is conveyed by two cooperating rotary pistons, which are rotated in opposite directions in the usual way, the claws of one piston engaging in recesses of the other piston in the case of a possible claw pump.
  • a rotary piston pump is known in which the air path is unalterably predetermined by a gas inlet which is formed separately from the housing inlet.
  • the invention is concerned with the task of specifying an advantageously designed rotary piston pump.
  • a solution is thus created with regard to the arrangement and design of the gas channel between the filter part and the housing inlet, in which the gas channel is completely, but possibly also only partially, with regard to its longitudinal extension and/or its vertical extension - with reference to a conventional installation of the rotary piston pump - be included in the outer device contour of the rotary lobe pump.
  • the gas channel can be designed and arranged in such a way that it does not protrude, or does not protrude significantly, beyond the housing contour of the rotary piston pump.
  • the gas channel extends both outside of the pump housing, which extends further on both sides of the gas channel, and inside the same, correspondingly within the housing shell spanned by the pump housing as a whole.
  • the filter holder in particular the filter part arranged therein, can also be partially or completely integrated into the overall outer contour of the pump housing according to the above-described embodiments.
  • the housing inlet is exposed and combined with the intake attachment, which then forms the gas inlet without using the gas channel and the filter part arranged in the filter holder.
  • the rotary lobe pump has a modular design, which allows it to be used using the optionally partially integrated filter part and the gas channel or, alternatively, by arranging an intake attachment directly at the housing inlet, correspondingly bypassing the filter part on the pump side.
  • the intake attachment can have an external filter or lead to it.
  • the filter receptacle is connected to the gas inlet that is separate from the housing inlet.
  • the housing inlet can be connected to the separate gas inlet via the gas channel and the filter receptacle. The gas sucked in via the gas inlet is thus necessarily guided through the filter mount and thus through the filter part accommodated in the filter mount.
  • the filter holder preferably has a gas inlet and a gas outlet.
  • the gas inlet can be designed for a gas inlet flow, which can be unidirectional to a gas flow of the housing inlet.
  • the same Direction can be at least essentially achieved here, for example with reference to a definition of the direction by specifying angular degrees by a possible deviation of up to 5 or 10 degrees, beyond that up to, for example, 45 degrees.
  • a relevant gas flow in the housing inlet can be essentially perpendicular to a housing surface result.
  • the direction of the gas inlet flow can also be in the same direction and thus be directed perpendicularly to a plane formed by the top side of the housing.
  • the filter part can be a round filter part through which the gas to be filtered can essentially flow from radially outside to axially inside.
  • This can be, for example, a ring-shaped or cylindrical filter cartridge, further for example having a folded filter, for example a filter made of a fiber medium or the like folded in a zigzag shape.
  • the round filter part can also have a longitudinal axis, with the filtered gas essentially flowing through the filter part in the direction of the longitudinal axis, in particular leaving the filter part in the direction of the longitudinal axis.
  • the filtered gas can be directed into the gas duct after the round filter part in the direction of flow of the gas, being deflected by approximately 90°.
  • the relevant flow direction of the filtered gas immediately after the round filter part can thus be directed, for example, in the opposite direction to the flow direction of the gas inlet flow in the gas inlet and/or the gas flow in the housing inlet.
  • a gas flow can result in a substantially vertical upward direction immediately after leaving the round filter part in the direction of the gas channel.
  • the filtered gas can then flow through the gas duct after the first 90 degree deflection described above with a further 90 degree deflection.
  • the gas flow can be deflected vertically upwards from a flow direction be in a substantially horizontal direction in the direction of the housing inlet when the rotary lobe pump is installed in the usual way.
  • the filtered gas may also be subjected to a further 90 degree turn to form the gas flow of the housing inlet, such as a turn from a substantially horizontal flow direction to a substantially vertically downward flow direction.
  • the aforementioned 90-degree deflections are also given when a right angle, corresponding to exactly 90 degrees, is not necessarily maintained in this regard in the sense of an angle specification. Rather, in this regard, deflections can also be given in an angular range of plus/minus 10 to 20 degrees relative to the specified 90 degrees.
  • the gas channel can be formed in two parts, with a horizontal parting plane based on a conventional installation of the rotary piston pump.
  • the horizontal parting plane is preferably sealed in a gas-tight manner.
  • the horizontal parting plane can extend below a boundary plane of the rotary lobe pump given by the surrounding housing surface, alternatively also within this plane or, as is also preferred, above this plane, so that this parting plane possibly accessible from the outside.
  • a lower part of the gas channel can be formed in the housing and an upper part can be formed by the cover part that can be placed separately.
  • the cover part can be placed on the lower part to form the gas channel, in particular placed in a sealing manner.
  • the housing inlet can open out in the lower part of the gas channel, so that the housing inlet is exposed after the cover part has been removed.
  • the gas outlet can also be exposed after the cover part has been removed.
  • both filter mounts are provided, each with a filter part.
  • both filter parts can be connected between the gas inlet and the gas outlet, so that both filter parts are traversed during operation of the rotary piston pump.
  • These two filter parts are preferably provided in a parallel arrangement in terms of flow.
  • a rotary piston pump here in the form of a claw pump, with a housing 2.
  • the housing 2 has a housing top 3 in the usual configuration, which is also shown in the drawings and a side 4 that is essentially aligned perpendicularly to the top side 3 of the housing.
  • the housing 2 is shaped according to FIG figure 4 an outer circumferential contour K.
  • two rotary pistons 6 are arranged in a pump chamber 5 . These each rotate about a shaft 7, whose geometric axes of rotation x run in the same direction, parallel to one another and in the usual configuration in a horizontal plane.
  • rotary lobe pump 1 as a claw pump
  • two claws 8 of one rotary lobe 6 engage in recesses 9 of the other rotary lobe 6, with opposite directions of rotation r of the two rotary lobes 6.
  • the rotary pistons 6 are driven, for example, by a motor 10, in particular an electric motor, arranged directly on the housing 2.
  • the pump chamber 5 has a housing inlet 11 and a chamber outlet 12.
  • the housing inlet 11 is in accordance with the usual installation of the rotary piston pump 1 figure 1 assigned to the top of the housing 3.
  • a gas channel 13 can be provided, which extends transversely to the alignment of the axes of rotation x the rotary piston 6 can extend.
  • the gas channel 13 essentially leads from the housing inlet 11 towards the side 4 of the housing 2.
  • the housing inlet 11 opens into the gas channel 13 on the bottom side.
  • the gas duct 13 is essentially integrated into the housing 2 and, according to the illustrated embodiments, can protrude upwards over the contour K of the housing 2 and thus upwards over the upper side 3 of the housing surrounding the gas duct 13 .
  • the gas channel 13 extends with respect to its height h viewed perpendicularly to the longitudinal extension to a greater extent, for example two thirds of this height h, below the contour K and thus completely within the housing 2, and to a smaller extent, for example one third of height h, above the contour K.
  • the base 14 and/or the duct walls 15 essentially laterally delimiting the gas duct 13 can be part of the housing 2 . Thus, they can be made of the same material and possibly in one piece with the housing 2 .
  • FIGS Figures 1 to 8 illustrated embodiments two filter receptacles 16 may be provided, each for receiving a filter part 17.
  • the illustrations in FIGS Figures 11 to 13 show an embodiment with only one filter part 17.
  • Each filter receptacle 16 initially and essentially forms a receptacle housing, which can be a component of the pump housing 2 overall.
  • the filter part 17 can be a round filter part 18 with a central geometric axis y, which can be oriented transversely to the axes of rotation x of the rotary pistons 6 (cf figure 4 ).
  • Each filter part 17 can be shaped in the manner of a filter cartridge, for example having a filter element 19 folded in a zigzag shape.
  • the filter parts 17 can also be partially integrated into the housing contour, so that such a filter part 17 can extend inside the housing contour K with respect to its depth t viewed in the axial direction and with a further part outside the housing contour K.
  • This partial integration can also be seen on the outside by a corresponding design of the relevant filter mount 16 which, according to the exemplary embodiment shown, protrudes from the surface of the housing side 4 by approximately half the depth dimension t of the filter part 17 .
  • the respective filter mount 16 is designed for radial inflow of the filter part 17 accommodated in the filter mount 16.
  • the result is an annular inflow space 20 that completely encompasses the filter part 17 between a peripheral outer contour of the filter part 17 and an inner wall 21 of the filter mount 16 (cf figures 5 or 14 ).
  • the filter mount 16 and thus the filter part 17 accommodated therein is connected to an outflow channel 22.
  • this can be in the usual installation of the rotary lobe pump 1 extend completely within the housing 2 in the vertical direction.
  • the outflow channel 22, associated with the housing top 3, opens into the gas channel 13.
  • the outflow channel 22 can also run essentially in the same direction as the housing inlet 11 of the pump chamber 5.
  • the outflow duct 22 of one filter mount 16 or the outflow ducts 22 of both filter mounts 16 or both filter parts 17 enter the gas duct 13 in the area of an outflow opening 23, for which purpose the gas duct 13 in a double arrangement of filter parts 17 for connecting the two outflow openings 23 has one opposite the to the housing inlet 11 leading portion 24 by about 90 degrees with respect to a plan view of the housing top 3 angled portion 25 has.
  • this section 25 can have the same height h as the section 24 leading to the housing inlet 11.
  • Sections 24 and 25 can also have the same base 14, as well as the same, preferably circumferential, channel wall 15 (cf figure 2 ).
  • an inflow opening 27 Adjacent to the outflow openings 23 , but separated in a flow-tight manner by a partition 26 , an inflow opening 27 can be provided associated with each filter receptacle 16 , which opens into the respective inflow annular space 20 .
  • the two inflow openings 27 can be connected to one another in terms of flow via a distribution channel 28 .
  • a central gas inlet 29 leading to the outside can preferably open into the distribution channel 28 .
  • the gas inlet 29 can be provided adjacent to the inflow opening 27, connected via an opening 37 in a wall 38 separating the gas inlet 29 from the outflow opening.
  • the gas channel 13 and, moreover, preferably also the section 25 having the outflow and inflow openings can be in two parts, with a horizontal parting plane T. This occurs in the area of a support plane of a cover part 30 on the usual in the upright position with the end face of the surrounding channel wall 15 pointing upwards.
  • the cover part 30 can preferably be arranged in a flow-tight manner on the duct wall 15, for example by means of a screw connection, as also shown.
  • the cover part 30 In the closed position, the cover part 30 preferably also rests sealingly on the partition 26, preferably overlapping both the section 24 and the section 25.
  • the cover part 30 can also be made in several parts, for example having a cover part section alone for section 24.
  • the gas inlet 29 can, as is also preferred, be provided in the form of a corresponding opening in the cover part 30, which opening according to the exemplary embodiments shown can be offset by a chimney-like structure 31 on the cover part 30 in a spacing plane from the top side 3 of the housing.
  • the structure 31 can have fastening means 32 via which, for example, an intake attachment or the like can be arranged on the structure 31 and thus on the gas inlet 29 .
  • Each filter part 17 is accessible via a removable cover 33 of the filter holder 16 from the housing side 4, for example for maintenance purposes.
  • This cover 33 can be made transparent, so that even when the cover 33 is in place, the level of contamination of the filter part 17 arranged behind it can be seen.
  • the gas inlet 29 is designed for a gas inlet flow a, which is preferably directed in the same direction as the gas flow b of the housing inlet 11.
  • both flows a and b are directed perpendicularly to the housing top 3 with a flow direction in the usual installation of the rotary lobe pump 1 from above downward.
  • the gas flowing in through the gas inlet 29 is distributed according to throughput through the gas inlet 29 via the distribution channel 28 and flow through the inflow openings 27 to the two filter mounts 16, with the respective filter part 17 or the round filter part 18 in the area of the filter mounts 16 essentially moving from radially outwards is flowed through radially inside by the gas to be filtered.
  • the gas continues to flow in the direction of the respective gas outlet 34, tending in the direction of the y axis.
  • the filtered gas is conducted in the area of the gas outlet 34 via a first 90° deflection U1 through the outflow channel 22 and through the outflow opening 23 into the gas channel 13 .
  • the direction of flow in this regard within the outflow channel 22 in the direction of the gas channel 13 can, as is also preferred, opposite to the gas flows a and b in the area of the gas inlet 29 and the housing inlet 11.
  • the gas duct 13 is then flowed through with a further 90° deflection U2, so that a gas flow essentially results in the horizontal direction within the gas duct 13 .
  • the filtered gas is subjected to a further, third 90° deflection U3 at the end of the flow through the gas channel 13 (cf figure 4 ).
  • a modular construction can be created, which enables the integrated filter parts 17 to be used to clean the gas before it flows into the pump chamber 5 .
  • the housing inlet 11 can be exposed, for example for the direct attachment of an intake attachment 35, so that the rotary piston pump 1 can be used without using the gas channel 13 and without the filter parts 17 arranged in the filter receptacles 16.
  • the housing inlet 11 directly forms the gas inlet (cf figure 7 ).
  • a valve 36 can be arranged on the cover part 30, for example, having a line connection to the distribution channel 28 leading to the inflow openings 27 in the direction of flow c upstream of the filter parts 17.
  • a valve 36 is connected accordingly in the direction of flow between the gas inlet 29 and the filter parts 17 and opens, for example, in the event of improper operation.
  • a check valve 39 can be provided in particular in the area of the housing inlet 11, with an umbrella-shaped valve body 41 which, in a valve closed position as shown, acts sealingly against a valve seat 40 with a circumferential, sealing lip-like sealing edge.
  • the valve body 41 can be pushed into the valve seat 40, for example under the action of a spring force. The housing inlet 11 is closed in this position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Description

Gebiet der Technikfield of technology

Die Erfindung betrifft eine Drehkolbenpumpe nach den Merkmalen des Oberbegriffs des Anspruches 1.The invention relates to a rotary piston pump according to the features of the preamble of claim 1.

Stand der TechnikState of the art

Drehkolbenpumpen, insbesondere Klauenpumpen sind bekannt. Es wird beispielsweise auf die WO 2016/034485 A2 verwiesen. Das Fördern eines Gases erfolgt durch zwei zusammenwirkende Drehkolben, die in üblicher Weise in entgegengesetzte Richtungen gedreht werden, wobei bei einer möglichen Klauenpumpe die Klauen eines Kolbens in Ausnehmungen des anderen Kolbens eingreifen.Rotary piston pumps, in particular claw pumps, are known. For example, it will refer to the WO 2016/034485 A2 referred. A gas is conveyed by two cooperating rotary pistons, which are rotated in opposite directions in the usual way, the claws of one piston engaging in recesses of the other piston in the case of a possible claw pump.

In diesem Zusammenhang ist es weiter bekannt, in Gasströmungsrichtung vor dem Gehäuseeinlass eine Filtereinheit anzuordnen.In this context, it is also known to arrange a filter unit in front of the housing inlet in the gas flow direction.

Aus der DE 19927531 A1 ist eine Drehkolbenpumpe bekannt, bei welcher der Luftweg unabänderlich durch einen Gaseinlass, der gesondert zu dem Gehäuseeinlass ausgebildet ist, vorgegeben ist.From the DE 19927531 A1 a rotary piston pump is known in which the air path is unalterably predetermined by a gas inlet which is formed separately from the housing inlet.

Zusammenfassung der ErfindungSummary of the Invention

Ausgehend von dem dargelegten Stand der Technik beschäftigt sich die Erfindung mit der Aufgabenstellung, eine vorteilhaft ausgebildete Drehkolbenpumpe anzugeben.Proceeding from the prior art presented, the invention is concerned with the task of specifying an advantageously designed rotary piston pump.

Diese Aufgabe ist beim Gegenstand des Anspruches 1 gelöst, wobei darauf abgestellt ist, dass eine modulare Bauweise gegeben ist, die einerseits eine Nutzung des integrierten Filterteils zur Reinigung des Gases vor Einströmung in eine Pumpkammer ermöglicht, wobei die Filteraufnahme mit einem Gaseinlass verbunden ist, der gesondert zu dem Gehäuseeinlass ausgebildet ist, und andererseits eine Kombination des nach Abnahme eines Deckelteils freiliegenden Gehäuseeinlasses mit einem Ansaugvorsatz, wobei in dieser Konfiguration der Gehäuseeinlass unmittelbar den Gaseinlass bildet.This object is achieved with the subject matter of claim 1, which is based on the fact that a modular design is provided which, on the one hand, enables the integrated filter part to be used to clean the gas before it flows into a pump chamber, the filter holder being connected to a gas inlet which is formed separately from the housing inlet, and on the other hand a combination of the housing inlet, which is exposed after removal of a cover part, with an intake attachment, the housing inlet directly forming the gas inlet in this configuration.

Es ist so eine Lösung geschaffen, bezüglich der Anordnung und Ausbildung des Gaskanals zwischen Filterteil und Gehäuseeinlass, bei der der Gaskanal vollständig, gegebenenfalls aber auch nur teilweise, bezüglich seiner Längserstreckung und/oder seiner vertikalen Erstreckung - mit Bezug auf eine übliche Aufstellung der Drehkolbenpumpe - in die äußere Gerätekontur der Drehkolbenpumpe aufgenommen sein.A solution is thus created with regard to the arrangement and design of the gas channel between the filter part and the housing inlet, in which the gas channel is completely, but possibly also only partially, with regard to its longitudinal extension and/or its vertical extension - with reference to a conventional installation of the rotary piston pump - be included in the outer device contour of the rotary lobe pump.

So kann der Gaskanal so ausgebildet und angeordnet sein, dass dieser nicht oder nicht wesentlich über die Gehäusekontur der Drehkolbenpumpe übersteht. Bei einer teilintegrierten Lösung ergibt sich beispielsweise mit Bezug auf einen Vertikalschnitt durch die Drehkolbenpumpe bei üblicher Aufstellung eine Erstreckung des Gaskanals sowohl außerhalb des sich beidseitig des Gaskanals weiter erstreckenden Pumpengehäuses als auch innerhalb desselben, entsprechend innerhalb der durch das Pumpengehäuse insgesamt aufgespannten Gehäusehülle.The gas channel can be designed and arranged in such a way that it does not protrude, or does not protrude significantly, beyond the housing contour of the rotary piston pump. In a partially integrated solution, for example with reference to a vertical section through the rotary lobe pump in the usual installation, the gas channel extends both outside of the pump housing, which extends further on both sides of the gas channel, and inside the same, correspondingly within the housing shell spanned by the pump housing as a whole.

Es kann hierdurch eine raumsparende Ausbildung einer Drehkolbenpumpe mit zumindest teilweise integriertem Gaskanal und/oder Filteraufnahme erreicht sein.In this way, a space-saving design of a rotary piston pump with an at least partially integrated gas channel and/or filter holder can be achieved.

Auch die Filteraufnahme, insbesondere das hierin angeordnete Filterteil, kann gemäß den vorbeschriebenen Ausführungen teilweise oder auch vollständig integriert sein in die Außenkontur des Pumpengehäuses insgesamt.The filter holder, in particular the filter part arranged therein, can also be partially or completely integrated into the overall outer contour of the pump housing according to the above-described embodiments.

Die Zugänglichkeit des Filterteils von einer Seitenfläche der Drehkolbenpumpe aus kann sich handhabungstechnisch als vorteilhaft erweisen.The accessibility of the filter part from a side surface of the rotary piston pump can prove to be advantageous in terms of handling.

Alternativ ist der Gehäuseeinlass nach Abnahme des Deckelteils freiliegend und mit dem Ansaugvorsatz kombiniert, der ohne Nutzung des Gaskanals und des in der Filteraufnahme angeordneten Filterteils den Gaseinlass dann bildet. Es ist eine Modulbauweise der Drehkolbenpumpe gegeben, die es erlaubt, diese unter Nutzung des gegebenenfalls teilweise integrierten Filterteils und des Gaskanals zu nutzen oder alternativ unter unmittelbarer Anordnung eines Ansaugvorsatzes an den Gehäuseeinlass, entsprechend unter Umgehung des pumpenseitigen Filterteils. Der Ansaugvorsatz kann hierbei einen externen Filter aufweisen oder zu diesem führen.Alternatively, after the cover part has been removed, the housing inlet is exposed and combined with the intake attachment, which then forms the gas inlet without using the gas channel and the filter part arranged in the filter holder. The rotary lobe pump has a modular design, which allows it to be used using the optionally partially integrated filter part and the gas channel or, alternatively, by arranging an intake attachment directly at the housing inlet, correspondingly bypassing the filter part on the pump side. In this case, the intake attachment can have an external filter or lead to it.

So ist die Filteraufnahme in einer Konfiguration mit dem Gaseinlass verbunden, der gesondert zu dem Gehäuseeinlass ausgebildet ist. Der Gehäuseeinlass kann entsprechend gemäß dieser Konfiguration über den Gaskanal und die Filteraufnahme mit dem gesonderten Gaseinlass verbunden sein. Das über den Gaseinlass angesaugte Gas wird so zwangsläufig durch die Filteraufnahme und somit durch das in der Filteraufnahme aufgenommene Filterteil geführt.Thus, in a configuration, the filter receptacle is connected to the gas inlet that is separate from the housing inlet. According to this configuration, the housing inlet can be connected to the separate gas inlet via the gas channel and the filter receptacle. The gas sucked in via the gas inlet is thus necessarily guided through the filter mount and thus through the filter part accommodated in the filter mount.

Die Filteraufnahme weist entsprechend bevorzugt einen Gaseinlass und einen Gasauslass auf.Accordingly, the filter holder preferably has a gas inlet and a gas outlet.

Der Gaseinlass kann für eine Gaseinlassströmung ausgebildet sein, die gleichgerichtet sein kann zu einer Gasströmung des Gehäuseeinlasses. Die gleiche Richtung kann hierbei zumindest im Wesentlichen erreicht sein, so beispielsweise mit Bezug auf eine Definition der Richtung durch Angabe von Winkelgraden durch eine mögliche Abweichung von bis zu 5 oder 10 Grad, darüber hinaus bis hin zu beispielsweise 45 Grad. So kann sich weiter bei einem bevorzugten Gehäuseeinlass an der Gehäuseoberseite eine diesbezügliche Gasströmung im Gehäuseeinlass im Wesentlichen senkrecht zu einer Gehäuseoberfläche ergeben. Entsprechend kann auch die Richtung der Gaseinlassströmung gleichgerichtet und somit senkrecht gerichtet sein zu einer durch die Gehäuseoberseite gebildeten Ebene.The gas inlet can be designed for a gas inlet flow, which can be unidirectional to a gas flow of the housing inlet. The same Direction can be at least essentially achieved here, for example with reference to a definition of the direction by specifying angular degrees by a possible deviation of up to 5 or 10 degrees, beyond that up to, for example, 45 degrees. In addition, with a preferred housing inlet on the housing top, a relevant gas flow in the housing inlet can be essentially perpendicular to a housing surface result. Correspondingly, the direction of the gas inlet flow can also be in the same direction and thus be directed perpendicularly to a plane formed by the top side of the housing.

Das Filterteil kann ein Rundfilterteil sein, das im Wesentlichen von radial außen nach axial innen von dem zu filternden Gas durchströmbar sein kann. Es kann sich hierbei beispielsweise um eine ring- beziehungsweise zylinderförmige Filterpatrone handeln, weiter beispielsweise aufweisend einen gefalteten Filter, beispielsweise einen in Zickzackform gefalteten Filter aus einem Fasermedium oder dergleichen.The filter part can be a round filter part through which the gas to be filtered can essentially flow from radially outside to axially inside. This can be, for example, a ring-shaped or cylindrical filter cartridge, further for example having a folded filter, for example a filter made of a fiber medium or the like folded in a zigzag shape.

Auch kann das Rundfilterteil eine Längsachse aufweisen, wobei das gefilterte Gas im Wesentlichen in Richtung der Längsachse das Filterteil durchströmt, insbesondere in Richtung der Längsachse das Filterteil verlässt.The round filter part can also have a longitudinal axis, with the filtered gas essentially flowing through the filter part in the direction of the longitudinal axis, in particular leaving the filter part in the direction of the longitudinal axis.

Gemäß einer möglichen Ausführungsform kann das gefilterte Gas in Strömungsrichtung des Gases nach dem Rundfilterteil unter Umlenkung um etwa 90° in den Gaskanal geleitet werden. Die diesbezügliche Strömungsrichtung des gefilterten Gases unmittelbar nach dem Rundfilterteil kann so beispielsweise entgegengerichtet sein der Strömungsrichtung der Gaseinlassströmung im Gaseinlass und/oder der Gasströmung im Gehäuseeinlass. So kann sich diesbezüglich eine Gasströmung unmittelbar nach Verlassen des Rundfilterteils in Richtung auf den Gaskanal im Wesentlichen senkrecht nach oben ergeben.According to a possible embodiment, the filtered gas can be directed into the gas duct after the round filter part in the direction of flow of the gas, being deflected by approximately 90°. The relevant flow direction of the filtered gas immediately after the round filter part can thus be directed, for example, in the opposite direction to the flow direction of the gas inlet flow in the gas inlet and/or the gas flow in the housing inlet. In this respect, a gas flow can result in a substantially vertical upward direction immediately after leaving the round filter part in the direction of the gas channel.

Der Gaskanal kann im Weiteren von dem gefilterten Gas nach der vorbeschriebenen ersten 90 Grad-Umlenkung mit einer weiteren 90 Grad-Umlenkung durchströmt sein. So kann die Gasströmung beispielsweise, wie auch bevorzugt, aus einer Strömungsrichtung senkrecht nach oben umgelenkt sein in eine bei üblicher Aufstellung der Drehkolbenpumpe im Wesentlichen horizontale Richtung in Richtung auf den Gehäuseeinlass.The filtered gas can then flow through the gas duct after the first 90 degree deflection described above with a further 90 degree deflection. For example, as is also preferred, the gas flow can be deflected vertically upwards from a flow direction be in a substantially horizontal direction in the direction of the housing inlet when the rotary lobe pump is installed in the usual way.

Das gefilterte Gas kann darüber hinaus zur Bildung der Gasströmung des Gehäuseeinlasses einer weiteren Umlenkung um 90 Grad unterworfen sein, so beispielsweise einer Umlenkung aus einer im Wesentlichen horizontalen Strömungsrichtung in eine im Wesentlichen vertikal nach unten gerichtete Strömungsrichtung.The filtered gas may also be subjected to a further 90 degree turn to form the gas flow of the housing inlet, such as a turn from a substantially horizontal flow direction to a substantially vertically downward flow direction.

Im Sinne der Erfindung sind die vorbezeichneten 90 Grad-Umlenkungen auch dann gegeben, wenn diesbezüglich im Sinne einer Winkelangabe nicht zwingend ein rechter Winkel, entsprechend exakt 90 Grad, eingehalten ist. Vielmehr können diesbezüglich auch Umlenkungen in einem Winkelbereich von plus/minus 10 bis 20 Grad relativ zu den angegebenen 90 Grad gegeben sein.In terms of the invention, the aforementioned 90-degree deflections are also given when a right angle, corresponding to exactly 90 degrees, is not necessarily maintained in this regard in the sense of an angle specification. Rather, in this regard, deflections can also be given in an angular range of plus/minus 10 to 20 degrees relative to the specified 90 degrees.

Der Gaskanal kann zweiteilig gebildet sein, mit einer sich bezogen auf eine übliche Aufstellung der Drehkolbenpumpe horizontalen Trennebene. Im üblichen Betrieb der Drehkolbenpumpe, bei welchem Betrieb der Gaskanal im Sinne der Erfindung genutzt wird, ist die horizontale Trennebene bevorzugt gasdicht verschlossen.The gas channel can be formed in two parts, with a horizontal parting plane based on a conventional installation of the rotary piston pump. In normal operation of the rotary piston pump, in which operation the gas channel is used in accordance with the invention, the horizontal parting plane is preferably sealed in a gas-tight manner.

Die horizontale Trennebene kann sich mit Bezug auf einen Vertikalschnitt durch die Drehkolbenpumpe in üblicher Aufstellung derselben unterhalb einer durch die umgebende Gehäuseoberfläche gegebenen Begrenzungsebene der Drehkolbenpumpe erstrecken, alternativ auch innerhalb dieser Ebene oder, wie darüber hinaus auch bevorzugt, oberhalb dieser Ebene, so dass diese Trennebene gegebenenfalls von außen zugänglich ist.With reference to a vertical section through the rotary lobe pump in the usual installation, the horizontal parting plane can extend below a boundary plane of the rotary lobe pump given by the surrounding housing surface, alternatively also within this plane or, as is also preferred, above this plane, so that this parting plane possibly accessible from the outside.

So können ein unterer Teil des Gaskanals in dem Gehäuse und ein oberer Teil durch das gesondert aufsetzbare Deckelteil ausgebildet sein. Das Deckelteil ist zur Bildung des Gaskanals auf dem unteren Teil aufsetzbar, insbesondere dichtend aufsetzbar.A lower part of the gas channel can be formed in the housing and an upper part can be formed by the cover part that can be placed separately. The cover part can be placed on the lower part to form the gas channel, in particular placed in a sealing manner.

Der Gehäuseeinlass kann bei einer derartigen Ausgestaltung im unteren Teil des Gaskanals münden, so dass nach Abnahme des Deckelteils der Gehäuseeinlass freiliegt. Darüber hinaus kann nach Abnahme des Deckelteils auch der Gasauslass freiliegen.In such a configuration, the housing inlet can open out in the lower part of the gas channel, so that the housing inlet is exposed after the cover part has been removed. In addition, the gas outlet can also be exposed after the cover part has been removed.

In weiterer Ausgestaltung sind zwei Filteraufnahmen mit je einem Filterteil vorgesehen. Bei einer solchen Ausgestaltung können beide Filterteile zwischen dem Gaseinlass und dem Gasauslass geschaltet sein, so dass beide Filterteile im Betrieb der Drehkolbenpumpe durchströmt werden. Bevorzugt sind diese beiden Filterteile strömungsmäßig in einer Parallelanordnung vorgesehen.In a further embodiment, two filter mounts are provided, each with a filter part. In such an embodiment, both filter parts can be connected between the gas inlet and the gas outlet, so that both filter parts are traversed during operation of the rotary piston pump. These two filter parts are preferably provided in a parallel arrangement in terms of flow.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Nachstehend ist die Erfindung anhand der beigefügten Zeichnung erläutert, die aber lediglich Ausführungsbeispielen darstellt. Ein Teil, das nur bezogen auf eines der Ausführungsbeispiele erläutert ist und bei einem weiteren Ausführungsbeispiel aufgrund der dort herausgestellten Besonderheit nicht durch ein anderes Teil ersetzt ist, ist damit auch für dieses weitere Ausführungsbeispiel als jedenfalls mögliches vorhandenes Teil beschrieben. Die Zeichnung zeigt:

Fig. 1
eine Drehkolbenpumpe der in Rede stehenden Art in perspektivischer Darstellung, die übliche Aufstellung betreffend;
Fig. 2
eine der Figur 1 entsprechende Darstellung, jedoch nach Abnahme eines Deckelteils eines in das Gehäuse der Drehkolbenpumpe integrierten Gaskanals;
Fig. 3
die Stirnansicht gegen die Drehkolbenpumpe gemäß Pfeil III in Figur 1;
Fig. 4
eine schematische Schnittdarstellung durch die Drehkolbenpumpe gemäß der Schnittebene IV in Figur 1;
Fig. 5
den schematischen Schnitt gemäß der Linie V-V in Figur 4;
Fig. 6
den schematischen Schnitt gemäß der Linie VI-VI in Figur 4;
Fig. 7
eine der Figur 4 entsprechende Darstellung, jedoch nach Abnahme des Deckelteils und nach unmittelbarem Ansetzen eines Ansaugvorsatzes an einen Gehäuseeinlass;
Fig. 8
eine der Figur 1 entsprechende Darstellung, eine zweite Ausführungsform betreffend;
Fig. 9
die Ausführungsform gemäß Figur 8 in einer partiell geschnittenen Perspektivdarstellung, betreffend den mit einem Ventil versehenen Gaskanal;
Fig. 10
eine Schnittdarstellung gemäß Figur 4, betreffend eine weitere Ausführungsform mit einem Rückschlagventil;
Fig. 11
eine der Figur 1 im Wesentlichen entsprechende perspektivische Darstellung einer Drehkolbenpumpe in einer weiteren Ausführungsform;
Fig. 12
eine der Figur 2 entsprechende Darstellung, betreffend die Ausführungsform gemäß Figur 11;
Fig. 13
die Ausführungsform gemäß Figur 11 in einer Schnittdarstellung;
Fig. 14
eine der Figur 5 entsprechende Darstellung, betreffend die Ausführungsform gemäß Figur 11.
The invention is explained below with reference to the attached drawing, which, however, merely represents exemplary embodiments. A part that is only explained in relation to one of the exemplary embodiments and is not replaced by another part in a further exemplary embodiment due to the special feature highlighted there is thus also described as a possible existing part for this further exemplary embodiment. The drawing shows:
1
a rotary piston pump of the type in question in a perspective view, relating to the usual installation;
2
one of the figure 1 Corresponding representation, but after removal of a cover part of a gas channel integrated in the housing of the rotary piston pump;
3
the front view against the rotary lobe pump according to arrow III in figure 1 ;
4
a schematic sectional view through the rotary lobe pump according to the section plane IV in figure 1 ;
figure 5
the schematic section according to the line VV in figure 4 ;
6
the schematic section according to the line VI-VI in figure 4 ;
7
one of the figure 4 Corresponding representation, but after removing the cover part and after directly attaching an intake attachment to a housing inlet;
8
one of the figure 1 corresponding representation, concerning a second embodiment;
9
the embodiment according to figure 8 in a partially sectioned perspective view, relating to the gas channel provided with a valve;
10
a sectional view according to figure 4 , relating to a further embodiment with a check valve;
11
one of the figure 1 essentially corresponding perspective representation of a rotary piston pump in a further embodiment;
12
one of the figure 2 corresponding representation relating to the embodiment according to figure 11 ;
13
the embodiment according to figure 11 in a sectional view;
14
one of the figure 5 corresponding representation relating to the embodiment according to figure 11 .

Beschreibung der AusführungsformenDescription of the embodiments

Dargestellt und beschrieben ist, zunächst mit Bezug zu Figur 1, eine Drehkolbenpumpe 1, hier in Art einer Klauenpumpe, mit einem Gehäuse 2.Shown and described, first with reference to figure 1 , a rotary piston pump 1, here in the form of a claw pump, with a housing 2.

Das Gehäuse 2 weist bei einer üblichen Aufstellung, die in den zeichnerischen Darstellungen im Übrigen auch so gezeigt ist, eine Gehäuseoberseite 3 auf und eine senkrecht zu der Gehäuseoberseite 3 im Wesentlichen ausgerichtete Seite 4.The housing 2 has a housing top 3 in the usual configuration, which is also shown in the drawings and a side 4 that is essentially aligned perpendicularly to the top side 3 of the housing.

Das Gehäuse 2 formt insbesondere mit Bezug auf einen Vertikalschnitt gemäß Figur 4 eine äußere umlaufende Kontur K.The housing 2 is shaped according to FIG figure 4 an outer circumferential contour K.

Wie insbesondere aus den schematischen Darstellungen in Figuren 3 und 4 zu erkennen, sind in einer Pumpkammer 5 zwei Drehkolben 6 angeordnet. Diese drehen jeweils um eine Welle 7, deren geometrische Drehachsen x gleichgerichtet, parallel zueinander und in der üblichen Aufstellung in einer Horizontalebene verlaufen.As can be seen in particular from the schematic representations in Figures 3 and 4 can be seen, two rotary pistons 6 are arranged in a pump chamber 5 . These each rotate about a shaft 7, whose geometric axes of rotation x run in the same direction, parallel to one another and in the usual configuration in a horizontal plane.

In der dargestellten Ausführungsform der Drehkolbenpumpe 1 als Klauenpumpe greifen jeweils zwei Klauen 8 eines Drehkolbens 6 in Ausnehmungen 9 des anderen Drehkolbens 6, dies bei zueinander entgegengesetzter Drehrichtung r der beiden Drehkolben 6.In the illustrated embodiment of rotary lobe pump 1 as a claw pump, two claws 8 of one rotary lobe 6 engage in recesses 9 of the other rotary lobe 6, with opposite directions of rotation r of the two rotary lobes 6.

Angetrieben werden die Drehkolben 6 beispielsweise durch einen unmittelbar an dem Gehäuse 2 angeordneten Motor 10, insbesondere Elektromotor.The rotary pistons 6 are driven, for example, by a motor 10, in particular an electric motor, arranged directly on the housing 2.

Die Pumpkammer 5 verfügt über einen Gehäuseeinlass 11 und einen Kammerauslass 12.The pump chamber 5 has a housing inlet 11 and a chamber outlet 12.

Der Gehäuseeinlass 11 ist bei üblicher Aufstellung der Drehkolbenpumpe 1 gemäß Figur 1 zugeordnet der Gehäuseoberseite 3.The housing inlet 11 is in accordance with the usual installation of the rotary piston pump 1 figure 1 assigned to the top of the housing 3.

Ebenfalls zugeordnet der Gehäuseoberseite 3 kann, wie auch bevorzugt, ein Gaskanal 13 vorgesehen sein, der sich quer zur Ausrichtung der Drehachsen x der Drehkolben 6 erstrecken kann. Insbesondere führt der Gaskanal 13 im Wesentlichen von dem Gehäuseeinlass 11 in Richtung zur Seite 4 des Gehäuses 2.Also assigned to the housing top 3, as is also preferred, a gas channel 13 can be provided, which extends transversely to the alignment of the axes of rotation x the rotary piston 6 can extend. In particular, the gas channel 13 essentially leads from the housing inlet 11 towards the side 4 of the housing 2.

Der Gehäuseeinlass 11 mündet bodenseitig in den Gaskanal 13.The housing inlet 11 opens into the gas channel 13 on the bottom side.

Der Gaskanal 13 ist im Wesentlichen integriert in das Gehäuse 2, kann dabei, gemäß den dargestellten Ausführungsformen, nach oben über die Kontur K des Gehäuses 2 und somit nach oben über die den Gaskanal 13 umgebende Gehäuseoberseite 3 hinausragen.The gas duct 13 is essentially integrated into the housing 2 and, according to the illustrated embodiments, can protrude upwards over the contour K of the housing 2 and thus upwards over the upper side 3 of the housing surrounding the gas duct 13 .

In den dargestellten Ausführungsbeispielen erstreckt sich der Gaskanal 13 bezüglich seiner senkrecht zur Längserstreckung betrachteten Höhe h zu einem größeren Teil, beispielsweise zwei Drittel dieser Höhe h, unterhalb der Kontur K und somit vollständig innerhalb des Gehäuses 2, und mit einem kleineren Anteil, beispielsweise einem Drittel der Höhe h, oberhalb der Kontur K.In the exemplary embodiments shown, the gas channel 13 extends with respect to its height h viewed perpendicularly to the longitudinal extension to a greater extent, for example two thirds of this height h, below the contour K and thus completely within the housing 2, and to a smaller extent, for example one third of height h, above the contour K.

Der Boden 14 und/oder die den Gaskanal 13 im Wesentlichen seitlich begrenzenden Kanalwände 15 können Teil des Gehäuses 2 sein. So können diese materialeinheitlich und gegebenenfalls einteilig mit dem Gehäuse 2 ausgebildet sein.The base 14 and/or the duct walls 15 essentially laterally delimiting the gas duct 13 can be part of the housing 2 . Thus, they can be made of the same material and possibly in one piece with the housing 2 .

Auf der Seite 4, die in dem dargestellten Ausführungsbeispiel im Wesentlichen einer Längsseite der Drehkolbenpumpe 1 insgesamt entspricht, können gemäß den beispielsweise in den Figuren 1 bis 8 dargestellten Ausführungsformen zwei Filteraufnahmen 16 vorgesehen sein, zur Aufnahme jeweils eines Filterteils 17. Die Darstellungen in den Figuren 11 bis 13 zeigen eine Ausführungsform mit nur einem Filterteil 17.On page 4, which in the illustrated embodiment essentially corresponds to a longitudinal side of rotary piston pump 1 as a whole, according to the example in FIGS Figures 1 to 8 illustrated embodiments, two filter receptacles 16 may be provided, each for receiving a filter part 17. The illustrations in FIGS Figures 11 to 13 show an embodiment with only one filter part 17.

Jede Filteraufnahme 16 formt zunächst und im Wesentlichen ein Aufnahmegehäuse, welches insgesamt Bestandteil des Pumpengehäuses 2 sein kann.Each filter receptacle 16 initially and essentially forms a receptacle housing, which can be a component of the pump housing 2 overall.

Das Filterteil 17 kann, wie auch dargestellt, ein Rundfilterteil 18 sein mit einer zentralen geometrischen Achse y, die quer ausgerichtet sein kann zu den Drehachsen x der Drehkolben 6 (vergleiche hierzu auch Figur 4).As also shown, the filter part 17 can be a round filter part 18 with a central geometric axis y, which can be oriented transversely to the axes of rotation x of the rotary pistons 6 (cf figure 4 ).

Ein jedes Filterteil 17 kann in Art einer Filterpatrone geformt sein, beispielsweise aufweisend ein in Zickzackform gefaltetes Filterelement 19.Each filter part 17 can be shaped in the manner of a filter cartridge, for example having a filter element 19 folded in a zigzag shape.

Auch die Filterteile 17 können, wie auch dargestellt, teilweise integriert in die Gehäusekontur angeordnet sein, so dass sich ein solches Filterteil 17 mit Bezug auf dessen in Achsrichtung betrachtete Tiefe t innerhalb der Gehäusekontur K und mit einem weiteren Teil außerhalb der Gehäusekontur K erstrecken kann. Diese Teilintegration kann sich nach außen auch zeigen durch eine entsprechende Ausgestaltung der diesbezüglichen Filteraufnahme 16, die gemäß dem dargestellten Ausführungsbeispiel gegenüber der Oberfläche der Gehäuseseite 4 etwa um das halbe Tiefenmaß t des Filterteils 17 hinausragt.As also shown, the filter parts 17 can also be partially integrated into the housing contour, so that such a filter part 17 can extend inside the housing contour K with respect to its depth t viewed in the axial direction and with a further part outside the housing contour K. This partial integration can also be seen on the outside by a corresponding design of the relevant filter mount 16 which, according to the exemplary embodiment shown, protrudes from the surface of the housing side 4 by approximately half the depth dimension t of the filter part 17 .

Die jeweilige Filteraufnahme 16 ist ausgelegt zur radialen Anströmung des in der Filteraufnahme 16 aufgenommenen Filterteils 17. Es ergibt sich etwa ein vollständig das Filterteil 17 umfassender Anström-Ringraum 20 zwischen einer umlaufenden Außenkontur des Filterteils 17 und einer Innenwandung 21 der Filteraufnahme 16 (vergleiche Figuren 5 oder 14).The respective filter mount 16 is designed for radial inflow of the filter part 17 accommodated in the filter mount 16. The result is an annular inflow space 20 that completely encompasses the filter part 17 between a peripheral outer contour of the filter part 17 and an inner wall 21 of the filter mount 16 (cf figures 5 or 14 ).

Auslassseitig ist die Filteraufnahme 16 und somit das hierin aufgenommene Filterteil 17 angeschlossen an einen Abströmkanal 22. Dieser kann sich, wie auch dargestellt, bei üblicher Aufstellung der Drehkolbenpumpe 1 vollständig innerhalb des Gehäuses 2 in vertikaler Richtung erstrecken. Der Abströmkanal 22 mündet zugeordnet der Gehäuseoberseite 3 in den Gaskanal 13.On the outlet side, the filter mount 16 and thus the filter part 17 accommodated therein is connected to an outflow channel 22. As also shown, this can be in the usual installation of the rotary lobe pump 1 extend completely within the housing 2 in the vertical direction. The outflow channel 22, associated with the housing top 3, opens into the gas channel 13.

Der Abströmkanal 22 kann darüber hinaus im Wesentlichen gleichgerichtet ausgerichtet verlaufen wie der Gehäuseeinlass 11 der Pumpkammer 5.The outflow channel 22 can also run essentially in the same direction as the housing inlet 11 of the pump chamber 5.

Der Abströmkanal 22 der einen Filteraufnahme 16 beziehungsweise die Abströmkanäle 22 beider Filteraufnahmen 16 beziehungsweise beider Filterteile 17 treten im Bereich einer Abströmöffnung 23 in den Gaskanal 13 ein, wozu der Gaskanal 13 bei einer Zweifach-Anordnung von Filterteilen 17 zur Verbindung beider Abströmöffnungen 23 einen gegenüber dem zu dem Gehäuseeinlass 11 führenden Abschnitt 24 um etwa 90 Grad mit Bezug auf eine Draufsicht auf die Gehäuseoberseite 3 abgewinkelten Abschnitt 25 aufweist. Dieser Abschnitt 25 kann, wie auch bevorzugt, die gleiche Höhe h aufweisen wie der zu dem Gehäuseeinlass 11 führende Abschnitt 24. Auch können die Abschnitte 24 und 25 über denselben Boden 14 verfügen, wie auch über dieselbe, bevorzugt umlaufende Kanalwand 15 (vergleiche Figur 2).The outflow duct 22 of one filter mount 16 or the outflow ducts 22 of both filter mounts 16 or both filter parts 17 enter the gas duct 13 in the area of an outflow opening 23, for which purpose the gas duct 13 in a double arrangement of filter parts 17 for connecting the two outflow openings 23 has one opposite the to the housing inlet 11 leading portion 24 by about 90 degrees with respect to a plan view of the housing top 3 angled portion 25 has. As is also preferred, this section 25 can have the same height h as the section 24 leading to the housing inlet 11. Sections 24 and 25 can also have the same base 14, as well as the same, preferably circumferential, channel wall 15 (cf figure 2 ).

Benachbart, aber durch eine Trennwand 26 strömungsdicht getrennt zu den Abströmöffnungen 23 kann zugeordnet jeder Filteraufnahme 16 eine Einströmöffnung 27 vorgesehen sein, die in den jeweiligen Anström-Ringraum 20 mündet.Adjacent to the outflow openings 23 , but separated in a flow-tight manner by a partition 26 , an inflow opening 27 can be provided associated with each filter receptacle 16 , which opens into the respective inflow annular space 20 .

Sind zwei Filterteile vorgesehen, so können beide Einströmöffnungen 27 über einen Verteilerkanal 28 strömungsmäßig miteinander verbunden sein. Dabei kann in den Verteilerkanal 28 bevorzugt ein zentraler, nach außen geführter Gaseinlass 29 münden.If two filter parts are provided, the two inflow openings 27 can be connected to one another in terms of flow via a distribution channel 28 . A central gas inlet 29 leading to the outside can preferably open into the distribution channel 28 .

Bei einer Ein-Filterlösung kann der Gaseinlass 29 benachbart zu der Einströmöffnung 27 vorgesehen sein, verbunden über einen Durchbruch 37 in einer den Gaseinlass 29 zur Abströmöffnung trennenden Wand 38.In a one-filter solution, the gas inlet 29 can be provided adjacent to the inflow opening 27, connected via an opening 37 in a wall 38 separating the gas inlet 29 from the outflow opening.

Bezogen auf eine übliche Aufstellung der Drehkolbenpumpe kann sich eine Zweiteiligkeit des Gaskanals 13 und darüber hinaus bevorzugt auch des die Abström- und Einströmöffnungen aufweisenden Abschnitts 25 ergeben, mit einer horizontalen Trennebene T. Diese ergibt sich im Bereich einer Auflageebene eines Deckelteiles 30 auf der im üblichen Aufstellzustand nach oben weisenden Stirnfläche der umlaufenden Kanalwand 15.In relation to a conventional installation of the rotary lobe pump, the gas channel 13 and, moreover, preferably also the section 25 having the outflow and inflow openings, can be in two parts, with a horizontal parting plane T. This occurs in the area of a support plane of a cover part 30 on the usual in the upright position with the end face of the surrounding channel wall 15 pointing upwards.

Das Deckelteil 30 ist bevorzugt strömungsdicht auf der Kanalwand 15 anordbar, beispielsweise durch eine, wie auch dargestellt, vorgesehene Verschraubung.The cover part 30 can preferably be arranged in a flow-tight manner on the duct wall 15, for example by means of a screw connection, as also shown.

Das Deckelteil 30 liegt in der Verschlussstellung bevorzugt auch dichtend auf der Trennwand 26 auf, überfängt hierbei bevorzugt sowohl den Abschnitt 24 als auch den Abschnitt 25. Alternativ zu der einteiligen Ausgestaltung des Deckelteils 30 kann dieser auch mehrteilig ausgebildet sein, so beispielsweise aufweisend einen Deckelteilabschnitt allein für den Abschnitt 24.In the closed position, the cover part 30 preferably also rests sealingly on the partition 26, preferably overlapping both the section 24 and the section 25. As an alternative to the one-piece design of the cover part 30, it can also be made in several parts, for example having a cover part section alone for section 24.

Der Gaseinlass 29 kann, wie auch bevorzugt, in Form eines entsprechenden Durchbruches in dem Deckelteil 30 vorgesehen sein, welcher Durchbruch gemäß den dargestellten Ausführungsbeispielen durch einen kaminartigen Aufbau 31 auf dem Deckelteil 30 in eine Abstandsebene zur Gehäuseoberseite 3 versetzt sein kann.The gas inlet 29 can, as is also preferred, be provided in the form of a corresponding opening in the cover part 30, which opening according to the exemplary embodiments shown can be offset by a chimney-like structure 31 on the cover part 30 in a spacing plane from the top side 3 of the housing.

Der Aufbau 31 kann über Befestigungsmittel 32 verfügen, über welche an dem Aufbau 31 und somit an dem Gaseinlass 29 beispielsweise ein Ansaugvorsatz oder dergleichen angeordnet werden kann.The structure 31 can have fastening means 32 via which, for example, an intake attachment or the like can be arranged on the structure 31 and thus on the gas inlet 29 .

Jedes Filterteil 17 ist über eine entfernbare Abdeckung 33 der Filteraufnahme 16 von der Gehäuseseite 4 aus beispielsweise zu Wartungszwecken zugänglich. Diese Abdeckung 33 kann transparent ausgebildet sein, so dass sich auch bei angeordneter Abdeckung 33 der Verschmutzungszustand des dahinter angeordneten Filterteiles 17 erkennen lassen kann.Each filter part 17 is accessible via a removable cover 33 of the filter holder 16 from the housing side 4, for example for maintenance purposes. This cover 33 can be made transparent, so that even when the cover 33 is in place, the level of contamination of the filter part 17 arranged behind it can be seen.

Der Gaseinlass 29 ist für eine Gaseinlassströmung a ausgebildet, die bevorzugt gleichgerichtet ist zu der Gasströmung b des Gehäuseeinlasses 11. So sind in einer bevorzugten Ausgestaltung beide Strömungen a und b senkrecht gerichtet zu der Gehäuseoberseite 3 mit einer Strömungsrichtung in üblicher Aufstellung der Drehkolbenpumpe 1 von oben nach unten.The gas inlet 29 is designed for a gas inlet flow a, which is preferably directed in the same direction as the gas flow b of the housing inlet 11. In a preferred embodiment, both flows a and b are directed perpendicularly to the housing top 3 with a flow direction in the usual installation of the rotary lobe pump 1 from above downward.

Das durch den Gaseinlass 29 einströmende Gas verteilt sich nach Durchsatz durch den Gaseinlass 29 über den Verteilkanal 28 und Durchströmen der Einströmöffnungen 27 auf die beiden Filteraufnahmen 16, wobei im Bereich der Filteraufnahmen 16 das jeweilige Filterteil 17 beziehungsweise das Rundfilterteil 18 im Wesentlichen von radial außen nach radial innen von dem zu filternden Gas durchströmt wird. Das Gas strömt hierbei weiter in Richtung auf den jeweiligen Gasauslass 34 tendenziell in Richtung der Achse y.The gas flowing in through the gas inlet 29 is distributed according to throughput through the gas inlet 29 via the distribution channel 28 and flow through the inflow openings 27 to the two filter mounts 16, with the respective filter part 17 or the round filter part 18 in the area of the filter mounts 16 essentially moving from radially outwards is flowed through radially inside by the gas to be filtered. In this case, the gas continues to flow in the direction of the respective gas outlet 34, tending in the direction of the y axis.

In Strömungsrichtung c des Gases betrachtet nach dem Filterteil 17 wird das gefilterte Gas im Bereich des Gasauslasses 34 über eine erste 90°-Umlenkung U1 durch den Abströmkanal 22 und durch die Abströmöffnung 23 in den Gaskanal 13 geleitet. Die diesbezügliche Strömungsrichtung innerhalb des Abströmkanals 22 in Richtung auf den Gaskanal 13 kann, wie auch bevorzugt, entgegengerichtet sein zu den Gasströmungen a und b im Bereich des Gaseinlasses 29 und des Gehäuseeinlasses 11.Viewed in flow direction c of the gas downstream of the filter part 17 , the filtered gas is conducted in the area of the gas outlet 34 via a first 90° deflection U1 through the outflow channel 22 and through the outflow opening 23 into the gas channel 13 . The direction of flow in this regard within the outflow channel 22 in the direction of the gas channel 13 can, as is also preferred, opposite to the gas flows a and b in the area of the gas inlet 29 and the housing inlet 11.

Der Gaskanal 13 wird hiernach mit einer weiteren 90°-Umlenkung U2 durchströmt, so dass sich innerhalb des Gaskanals 13 eine Gasströmung im Wesentlichen in Horizontalrichtung ergibt.The gas duct 13 is then flowed through with a further 90° deflection U2, so that a gas flow essentially results in the horizontal direction within the gas duct 13 .

Zur Bildung der Gasströmung b in dem Gehäuseeinlass 11 wird das gefilterte Gas zum Ende der Durchströmung des Gaskanals 13 einer weiteren, dritten 90°-Umlenkung U3 unterworfen (vergleiche Figur 4).To form the gas flow b in the housing inlet 11, the filtered gas is subjected to a further, third 90° deflection U3 at the end of the flow through the gas channel 13 (cf figure 4 ).

Es kann eine modulare Bauweise geschaffen sein, die die Nutzung der integrierten Filterteile 17 zur Reinigung des Gases vor Einströmen in die Pumpkammer 5 ermöglicht. Darüber hinaus kann zufolge Entfernen des Deckelteils 30 der Gehäuseeinlass 11 freigelegt werden, beispielsweise zum unmittelbaren Ansetzen eines Ansaugvorsatzes 35, so dass die Drehkolbenpumpe 1 ohne Nutzung des Gaskanals 13 und ohne der in den Filteraufnahmen 16 angeordneten Filterteile 17 genutzt werden kann. Der Gehäuseeinlass 11 bildet in dieser Konfiguration unmittelbar den Gaseinlass (vergleiche Figur 7).A modular construction can be created, which enables the integrated filter parts 17 to be used to clean the gas before it flows into the pump chamber 5 . In addition, by removing the cover part 30, the housing inlet 11 can be exposed, for example for the direct attachment of an intake attachment 35, so that the rotary piston pump 1 can be used without using the gas channel 13 and without the filter parts 17 arranged in the filter receptacles 16. In this configuration, the housing inlet 11 directly forms the gas inlet (cf figure 7 ).

Gemäß der Ausführungsform in den Figuren 8 und 9 kann darüber hinaus beispielsweise an dem Deckelteil 30 ein Ventil 36 angeordnet sein, aufweisend eine Leitungsverbindung zum zu den Einströmöffnungen 27 führenden Verteilerkanal 28 in Strömungsrichtung c vor den Filterteilen 17. Ein solches Ventil 36 ist entsprechend in Strömungsrichtung geschaltet zwischen dem Gaseinlass 29 und den Filterteilen 17 und öffnet beispielsweise bei einem nicht ordnungsgemäßen Betrieb.According to the embodiment in FIGS figures 8 and 9 In addition, a valve 36 can be arranged on the cover part 30, for example, having a line connection to the distribution channel 28 leading to the inflow openings 27 in the direction of flow c upstream of the filter parts 17. Such a valve 36 is connected accordingly in the direction of flow between the gas inlet 29 and the filter parts 17 and opens, for example, in the event of improper operation.

Wie in der weiteren Ausführungsform in Figur 10 dargestellt, kann insbesondere im Bereich des Gehäuseeinlasses 11 ein Rückschlagventil 39 vorgesehen sein, mit einem schirmförmigen Ventilkörper 41, der in einer wie auch dargestellten Ventilverschlussstellung mit einem umlaufenden, dichtlippenartigen Dichtrand dichtend gegen einen Ventilsitz 40 wirkt. Dabei kann, wie bevorzugt, der Ventilkörper 41 beispielsweise unter Federkraftbeaufschlagung in den Ventilsitz 40 gedrängt sein. Der Gehäuseeinlass 11 ist in dieser Stellung geschlossen.As in the further embodiment in figure 10 shown, a check valve 39 can be provided in particular in the area of the housing inlet 11, with an umbrella-shaped valve body 41 which, in a valve closed position as shown, acts sealingly against a valve seat 40 with a circumferential, sealing lip-like sealing edge. In this case, as is preferred, the valve body 41 can be pushed into the valve seat 40, for example under the action of a spring force. The housing inlet 11 is closed in this position.

Erst mit Einschalten der Drehkolbenpumpe 1 und damit einhergehendem Aufbau einer Gasströmung wird der Ventilkörper 41 entgegen der Rückstellkraft der gegebenenfalls vorgesehenen Feder vom Ventilsitz 40 abgehoben und der Gehäuseeinlass 11 geöffnet (siehe strichpunktierte Darstellung in Figur 10).Only when the rotary piston pump 1 is switched on and a gas flow is established as a result, is the valve body 41 lifted off the valve seat 40 against the restoring force of the spring that may be provided, and the housing inlet 11 is opened (see dot-dash representation in Fig figure 10 ).

Bei einem Abstellen der Drehkolbenpumpe 1 fällt das Rückschlagventil 39 selbsttätig in die Schließstellung. Liste der Bezugszeichen 1 Drehkolbenpumpe 28 Verteilerkanal 2 Gehäuse 29 Gaseinlass 3 Gehäuseoberseite 30 Deckelteil 4 Seite 31 Aufbau 5 Pumpkammer 32 Befestigungsmittel 6 Drehkolben 33 Abdeckung 7 Welle 34 Gasauslass 8 Klaue 35 Ansaugvorsatz 9 Ausnehmung 36 Ventil 10 Motor 37 Durchbruch 11 Gehäuseeinlass 38 Wand 12 Kammerauslass 39 Rückschlagventil 13 Gaskanal 40 Ventilsitz 14 Boden 41 Ventilkörper 15 Kanalwand a Gaseinlassströmung 16 Filteraufnahme b Gasströmung 17 Filterteil c Strömungsrichtung 18 Rundfilterteil h Höhe 19 Filterelement r Drehrichtung 20 Anström-Ringraum t Tiefe 21 Innenwand x Drehachse 22 Abströmkanal y Achse 23 Abströmöffnung K Kontur 24 Abschnitt T Trennebene 25 Abschnitt U1 erste 90°-Umlenkung 26 Trennwand U2 zweite 90°-Umlenkung 27 Einströmöffnung U3 dritte 90°-Umlenkung When the rotary piston pump 1 is switched off, the check valve 39 automatically falls into the closed position. <b><u>List of Reference Signs</u></b> 1 rotary lobe pump 28 distribution channel 2 Housing 29 gas inlet 3 case top 30 cover part 4 Page 31 Construction 5 pump chamber 32 fasteners 6 rotary piston 33 cover 7 Wave 34 gas outlet 8th claw 35 intake attachment 9 recess 36 Valve 10 engine 37 breakthrough 11 housing inlet 38 Wall 12 chamber outlet 39 check valve 13 gas channel 40 valve seat 14 Floor 41 valve body 15 canal wall a gas inlet flow 16 filter intake b gas flow 17 filter part c flow direction 18 round filter part H Height 19 filter element right direction of rotation 20 inflow annulus t depth 21 inner wall x axis of rotation 22 outflow channel y axis 23 outflow opening K contour 24 Section T parting line 25 Section U 1 first 90° deflection 26 partition wall U 2 second 90° deflection 27 inflow opening U 3 third 90° deflection

Claims (10)

  1. A rotary piston pump (1), in particular claw pump, comprising a housing (2) which has a housing inlet (11) on a housing upper side (3), wherein the housing inlet (11) is connected to a gas channel (13) that is integrated into the housing (2) and extends transversely to a rotational axis (x) of the piston (6), which gas channel creates a flow connection to a gas outlet (34) of a filter part (17) arranged in a filter receptacle (16), wherein furthermore, in the installed state, the filter part (17) is accessible from a side (4) perpendicular to the housing top side (3), for maintenance purposes, for example, characterized in that a modular design is provided, which, on the one hand, allows using the integrated filter part (17) for cleaning the gas before it flows into a pump chamber (5), wherein the filter receptacle (16) is connected to a gas inlet (29) which is formed separately from the housing inlet (11), and, on the other hand, allows a combination of the housing inlet (11), which is exposed after removal of a lid part (30), with a suction attachment (35), wherein in this configuration, the housing inlet (11) directly forms the gas inlet.
  2. The rotary piston pump according to claim 1, characterized in that the gas inlet (29) is formed for a gas inlet flow (a) that flows in the same direction as a gas flow (b) of the housing inlet (11).
  3. The rotary piston pump according to any one of the preceding claims, characterized in that the filter part (17) is a round filter part (18) through which the gas to be filtered can flow from radially outside to axially inside.
  4. The rotary piston pump according to any one of the preceding claims, characterized in that downstream of the filter part (17) in the flow direction (c) of the gas, the filtered gas is directed into the gas channel (13) by being deflected by approximately 90°.
  5. The rotary piston pump according to claim 4, characterized in that after the first 90° deflection (U1), the filtered gas flows through the gas channel (13) with a further 90° deflection (U2).
  6. The rotary piston pump according to claim 5, characterized in that the filtered gas is subjected to a further 90° deflection (U3) to form the gas flow (b) of the housing inlet (11).
  7. The rotary piston pump according to any one of the preceding claims, characterized in that the gas channel (13) is formed in two parts, with a parting plane (T) that is horizontal with respect to a customary placement of the rotary piston pump (1).
  8. The rotary piston pump according to claim 7, characterized in that a lower part of the gas channel (13) is formed in the housing (2), and an upper part is formed by a separately attachable lid part (30) .
  9. The rotary piston pump according to claim 8, characterized in that after removal of the lid part (30), the housing inlet (11) is exposed.
  10. The rotary piston pump according to any one of the preceding claims, characterized in that two filter receptacles (16), each having one filter part (17), are provided.
EP20703223.6A 2019-02-13 2020-02-03 Rotary piston pump having a filter Active EP3924605B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019103577.5A DE102019103577A1 (en) 2019-02-13 2019-02-13 Rotary lobe pump
PCT/EP2020/052591 WO2020164943A1 (en) 2019-02-13 2020-02-03 Rotary piston pump having a filter

Publications (2)

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EP3924605A1 EP3924605A1 (en) 2021-12-22
EP3924605B1 true EP3924605B1 (en) 2023-03-08

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EP20703223.6A Active EP3924605B1 (en) 2019-02-13 2020-02-03 Rotary piston pump having a filter

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US (1) US11725663B2 (en)
EP (1) EP3924605B1 (en)
CN (1) CN113366189B (en)
DE (1) DE102019103577A1 (en)
WO (1) WO2020164943A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD953375S1 (en) * 2019-05-23 2022-05-31 Gebr. Becker Gmbh Pump
CN117469159B (en) * 2023-12-04 2024-06-07 浙江红五环机械股份有限公司 Box structure for screw air compressor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL165532B (en) * 1970-10-23 1980-11-17 Conoflow Europa Nv CONNECTION OF TWO DIAMETRAL OPPOSITE SHOPS.
GB2059481B (en) * 1979-09-21 1983-03-16 Shell Int Research Hydraulically powered drilling sub for deepwell drilling
JPH086875B2 (en) * 1988-02-03 1996-01-29 大同メタル工業株式会社 Lubrication device
US6062827A (en) 1999-06-07 2000-05-16 Shu; Wu-Shuan Rotary pump
JP5766431B2 (en) * 2010-11-30 2015-08-19 三菱重工業株式会社 Electric compressor
DE202011104491U1 (en) * 2011-08-17 2012-11-20 Oerlikon Leybold Vacuum Gmbh Roots
DE102012008527B3 (en) * 2012-05-02 2013-07-25 Netzsch Pumpen & Systeme Gmbh ROTARY PISTON PUMP WITH OPTIMIZED INPUTS AND OUTLETS
US9770683B2 (en) * 2014-05-23 2017-09-26 Thermo King Corporation Compressor low cost oil filter
DE202014007117U1 (en) 2014-09-05 2015-12-09 Oerlikon Leybold Vacuum Gmbh claw pump
DE102015107721A1 (en) * 2015-05-18 2016-11-24 Gebr. Becker Gmbh Oil lubricated rotary vane vacuum pump
WO2017071641A1 (en) * 2015-10-29 2017-05-04 Emerson Climate Technologies, Inc. Compressor having capacity modulation system

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CN113366189B (en) 2024-06-04
WO2020164943A1 (en) 2020-08-20
DE102019103577A1 (en) 2020-08-13
EP3924605A1 (en) 2021-12-22
US11725663B2 (en) 2023-08-15
CN113366189A (en) 2021-09-07
US20220145888A1 (en) 2022-05-12

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