EP2504578A2 - Screw pump having an integrated pressure limiting valve - Google Patents

Screw pump having an integrated pressure limiting valve

Info

Publication number
EP2504578A2
EP2504578A2 EP10754884A EP10754884A EP2504578A2 EP 2504578 A2 EP2504578 A2 EP 2504578A2 EP 10754884 A EP10754884 A EP 10754884A EP 10754884 A EP10754884 A EP 10754884A EP 2504578 A2 EP2504578 A2 EP 2504578A2
Authority
EP
European Patent Office
Prior art keywords
spindle
screw pump
housing
pressure chamber
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10754884A
Other languages
German (de)
French (fr)
Other versions
EP2504578B1 (en
EP2504578B2 (en
Inventor
Walter Joistgen
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.)
Interlit Filtration GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2504578A2 publication Critical patent/EP2504578A2/en
Publication of EP2504578B1 publication Critical patent/EP2504578B1/en
Application granted granted Critical
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Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—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
    • F04C2/165—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 having more than two rotary pistons with parallel axes
    • 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
    • F01C21/02—Arrangements of bearings
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods

Definitions

  • the present invention relates to a screw pump with integrated pressure relief valve according to the preamble of patent claim 1.
  • Screw pumps are usually self-priming
  • Positive displacement pumps are particularly suitable for the low pressure range and serve to convey liquids in the form of supply and disposal pumps, for conveying heavy and light fuel oils, as well as for all lubricating liquids, waste and residual oils and fats.
  • screw pumps can be used as lubrication, sealing, control, hydraulic, cooling, and refrigeration oil pumps, as well as fuel pumps for engines.
  • a screw pump of this type which has three spindles, which are mounted parallel to each other in a pump housing.
  • the pump housing forms a
  • the pump housing further comprises an inlet channel is formed, which opens at one axial end of the spindle chamber in this and an outlet channel formed, which opens at another axial end to form the pressure chamber in this.
  • Pump housing or the housing wall used which extends coaxially with the spindles and opens into the pressure outlet channel. Furthermore, the pressure limiting valve has a connection with the inlet channel formed in the pump housing.
  • the pressure relief valve opens and relaxes the overpressure on the Suction side of the screw pump. This prevents a pressure overload of the pump.
  • the integration of the pressure relief valve in the pump housing makes it necessary to reinforce the pump housing or the housing wall on the provided mounting parts in order to create a receiving space for the pressure relief valve can. This causes an increase in the outer dimensions of the pump housing, the pump by the additional material gate on
  • Screw pump without the pressure relief valve does not increase.
  • Pressure relief valve no or little weight gain.
  • the pressure chamber is also formed in the flange portion of the pump housing, wherein the pressure relief valve opens directly into the pressure chamber.
  • the wall thickness of the pump housing remains in the range of Pressure chamber large enough to withstand the expected pressure in the pressure chamber, without additional wall reinforcements would have to be made here.
  • the flange plate of the pump is also advantageous to mold at such a point on the pump housing that the flange plate surrounds the pressure chamber like a belt.
  • the housing wall is additionally reinforced in the region of the pressure chamber.
  • Screw pump with inserted spindle and built-in (integrated) pressure relief valve Screw pump with inserted spindle and built-in (integrated) pressure relief valve.
  • the pump housing 1 of the screw pump consists of a flange portion 2 for mounting the pump to a non-illustrated component and a
  • a pressure chamber 6 is formed, which has a
  • Flange section 2 leads. On this outside is a pump cover 14
  • the shaft 18 of a spindle 20 is inserted, such that it is rotatably mounted in the through hole 16 of the pump cover 14 by means of a ball or roller bearing 22.
  • the spindle shaft 18 is provided with a sealing section 24
  • the spindle 20 finally forms a helical section 26 which is received in the spindle chamber 10 of the spindle housing section 4.
  • the pressure chamber 6 in the flange portion 2 is decentralized with respect to the
  • the flange portion 2 has an annular flange plate 29 formed thereon, which surrounds the pressure chamber 6 and thereby reinforces the housing wall of the flange portion 2.
  • a pressure relief valve 28 is inserted parallel to the spindle shaft 18 in the amount of the connecting hole 8 in the flange 2 and opens into the radially offset or outsourced portion 6a of the pressure chamber 6.
  • the flange portion 2 forms in this area a material accumulation 2a, in which the pressure chamber 6 is formed on the inside and which for
  • Pressure limiting valve 28 in a region between the spindle housing portion 4 and the flange plate 29 approximately at the level of the connecting bore 8 and coaxial with the spindle shaft 18th
  • the pressure limiting valve 28 in this case consists of a valve body 32 in the form of a piston whose piston tip 34 is sealingly seated on a valve seat 36, which is formed in the pump housing 1, that is, in the flange section 2.
  • the valve body 32 is in this case biased by a spring 38 on the valve seat 36, the biasing force is adjustable via an adjusting screw 40 which is also screwed into the flange portion 2 of the pump housing 1.
  • Below the valve seat 32 is a in Essentially provided perpendicular to the pressure relief valve 28 in the flange portion 2 drilled drain hole 42 which is connected to a fluid tank, not shown.
  • Pressure relief valve 28 relaxes the pressure directly into the fluid tank.
  • Embodiment is limited. Much more could the pressure limiting valve 28 also be inserted in the radial direction with respect to the connection bore 8 in the flange section 2, in which case the valve piston 32 of the pressure limiting valve 28 opens a parallel to the connecting hole 8 extending pressure relief hole between the pressure chamber 6 and a tank connection or closes. It is also conceivable to use the pressure limiting valve 28 above the flange plate 26, that is, between the flange plate 26 and the pump cover 14 in the flange 2, in which case the required for the Anflansch setup the pump cover 14 accumulation of material of the flange portion 2 for installation of the
  • Pressure relief valve 28 can be used.

Abstract

The invention relates to a screw pump, comprising a pump housing, on which a flange section for installing the pump is formed, and an integrated pressure limiting valve. According to the invention, the pressure limiting valve in the flange section of the pump housing is installed in said pump housing.

Description

Beschreibung  description
Schraubenspindelpumpe mit integriertem Druckbeqrenzungsventil Screw pump with integrated pressure limiting valve
Die vorliegende Erfindung betrifft eine Schraubenspindelpumpe mit integriertem Druckbegrenzungsventil gemäß dem Oberbegriff des Patentanspruchs 1. The present invention relates to a screw pump with integrated pressure relief valve according to the preamble of patent claim 1.
Schraubenspindelpumpen sind in der Regel selbst ansaugende Screw pumps are usually self-priming
Verdrängerpumpen vorzugsweise geeignet für den Niederdruckbereich und dienen zur Förderung von Flüssigkeiten in Form von Ver- und Entsorgungspumpen, zum Fördern von schweren und leichten Heizölen, sowie für alle schmierenden Flüssigkeiten, Alt- und Restölen sowie Fetten. Des Weiteren können Schraubenspindelpumpen eingesetzt werden als Schmier-, Dicht-, Regel-, Hydraulik-, Kühl-, und Kälteölpumpen, sowie Brennstoffpumpen für Motoren. Positive displacement pumps are particularly suitable for the low pressure range and serve to convey liquids in the form of supply and disposal pumps, for conveying heavy and light fuel oils, as well as for all lubricating liquids, waste and residual oils and fats. Furthermore, screw pumps can be used as lubrication, sealing, control, hydraulic, cooling, and refrigeration oil pumps, as well as fuel pumps for engines.
Aus dem Stand der Technik ist beispielsweise eine Schraubenspindelpumpe dieser Gattung bekannt, welche drei Spindeln hat, die parallel zueinander in einem Pumpengehäuse montiert sind. Das Pumpengehäuse bildet hierbei eine From the prior art, for example, a screw pump of this type is known, which has three spindles, which are mounted parallel to each other in a pump housing. The pump housing forms a
Spindelkammer aus, in welche die Schrauben- oder Wellenabschnitte der drei Spindeln ragen und die mit einer Druckkammer fluidverbunden ist. Im Pumpengehäuse ist des Weiteren ein Einlasskanal ausgeformt, der an einem axialen Ende der Spindelkammer in diese mündet und ein Auslasskanal ausgeformt, der an einem anderen axialen Ende unter Ausbildung der Druckkammer in diese einmündet. Spindle chamber into which project the screw or shaft portions of the three spindles and which is fluidly connected to a pressure chamber. In the pump housing further comprises an inlet channel is formed, which opens at one axial end of the spindle chamber in this and an outlet channel formed, which opens at another axial end to form the pressure chamber in this.
Parallel zur Spindelkammer ist ein Druckbegrenzungsventil in das Parallel to the spindle chamber is a pressure relief valve in the
Pumpengehäuse bzw. dessen Gehäusewand eingesetzt, welches sich koaxial zu den Spindeln erstreckt und in den Druckauslasskanal mündet. Des Weiteren hat das Druckbegrenzungsventil eine Verbindung mit dem im Pumpengehäuse ausgeformten Einlasskanal. Pump housing or the housing wall used, which extends coaxially with the spindles and opens into the pressure outlet channel. Furthermore, the pressure limiting valve has a connection with the inlet channel formed in the pump housing.
Übersteigt demzufolge der Druck im Druckauslasskanal einen vorbestimmten Wert, öffnet das Druckbegrenzungsventil und entspannt den Überdruck auf die Saugseite der Schraubenspindelpumpe. Dies verhindert eine Drucküberlastung der Pumpe. Die Integration des Druckbegrenzungsventils in das Pumpengehäuse macht es jedoch erforderlich, das Pumpengehäuse bzw. die Gehäusewand an der vorgesehenen Einbausteile zu verstärken, um einen Aufnahmeraum für das Druckbegrenzungsventil schaffen zu können. Dies bedingt eine Vergrößerung der äußeren Abmessungen des Pumpengehäüses, wobei die Pumpe durch den zusätzlichen Materialanguss am As a result, if the pressure in the pressure outlet channel exceeds a predetermined value, the pressure relief valve opens and relaxes the overpressure on the Suction side of the screw pump. This prevents a pressure overload of the pump. The integration of the pressure relief valve in the pump housing, however, makes it necessary to reinforce the pump housing or the housing wall on the provided mounting parts in order to create a receiving space for the pressure relief valve can. This causes an increase in the outer dimensions of the pump housing, the pump by the additional material gate on
Pumpengehäuse insgesamt auch schwerer wird. Pump housing is also heavier overall.
Angesichts dieses bekannten Stands der Technik ist es die Aufgabe der vorliegenden Erfindung, eine Schraubenspindelpumpe mit integriertem In view of this known prior art, it is the object of the present invention to provide a screw pump with integrated
Druckbegrenzungsventil bereitzustellen, dessen äußere Abmessungen kompakt gehalten werden können, und welches gegenüber dem Stand der Technik leichter baut. To provide pressure relief valve whose outer dimensions can be kept compact, and which is easier to build compared to the prior art.
Dieser Aufgabe wird durch eine Schraubenspindelpumpe mit den Merkmalen des Patentanspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung sind hierbei Gegenstand der Unteransprüche. This object is achieved by a screw pump with the features of claim 1. Further advantageous embodiments of the invention are the subject of the dependent claims.
Der Grundgedanke der Erfindung beruht darauf, bereits vorhandene für die Funktion und/oder den Einbau der Pumpe erforderliche Materialansammlungen am Pumpengehäuse für den Einbau eines integrierten Druckbegrenzungsventils zu nutzen. Erfindungsgemäß ist es daher vorgesehen, das Druckbegrenzungsventil im The basic idea of the invention is based on already existing material collections required for the function and / or installation of the pump on the pump housing for the installation of an integrated pressure relief valve. According to the invention it is therefore intended, the pressure relief valve in
Flanschabschnitt des Pumpengehäuses einzubauen, der funktionsbedingt bereits eine Materialanhäufung im Pumpengehäuse bzw. an der Gehäusewand aufweist. Auf diese Weise muss kein zusätzlicher Anguss an das Pumpengehäuse vorgesehen werden, sodass die äußeren Abmessungen des Pumpengehäuses gegenüber einer Install flange portion of the pump housing, the functionally already has an accumulation of material in the pump housing or on the housing wall. In this way, no additional sprue must be provided to the pump housing, so that the outer dimensions of the pump housing against a
Schraubenspindelpumpe ohne das Druckbegrenzungsventil nicht zunimmt. Darüber hinaus erfährt eine Schraubenspindelpumpe mit einem derart integrierten Screw pump without the pressure relief valve does not increase. In addition, learns a screw pump with such an integrated
Druckbegrenzungsventil keine oder nur geringe Gewichtszunahme. Pressure relief valve no or little weight gain.
Vorzugsweise ist bei der Schraubenspindelpumpe gemäß der vorliegenden Erfindung die Druckkammer ebenfalls im Flanschabschnitt des Pumpengehäuses ausgeformt, wobei das Druckbegrenzungsventil unmittelbar in die Druckkammer mündet. Auf diese Weise bleibt die Wandstärke des Pumpengehäuses im Bereich der Druckkammer groß genug, um dem zu erwartenden Druck in der Druckkammer Stand zu halten, ohne dass hier zusätzliche Wandverstärkungen vorgenommen werden müssten. Preferably, in the screw pump according to the present invention, the pressure chamber is also formed in the flange portion of the pump housing, wherein the pressure relief valve opens directly into the pressure chamber. In this way, the wall thickness of the pump housing remains in the range of Pressure chamber large enough to withstand the expected pressure in the pressure chamber, without additional wall reinforcements would have to be made here.
Weiter vorteilhaft ist es, die Flanschplatte der Pumpe an einer solchen Stelle am Pumpengehäuse auszuformen, dass die Flanschplatte die Druckkammer wie ein Gürtel umgibt. Auf diese Weise wird die Gehäusewandung im Bereich der Druckkammer zusätzlich verstärkt. It is also advantageous to mold the flange plate of the pump at such a point on the pump housing that the flange plate surrounds the pressure chamber like a belt. In this way, the housing wall is additionally reinforced in the region of the pressure chamber.
Die Erfindung wird nachstehend anhand eines bevorzugten Ausführungsbeispiels unter Bezugnahme auf die einzige begleitende Figur näher erläutert. Diese Figur zeigt einen Längsschnitt durch das Gehäuse einer erfindungsgemäßen The invention will be explained below with reference to a preferred embodiment with reference to the single accompanying figure. This figure shows a longitudinal section through the housing of an inventive
Schraubenspindelpumpe mit eingesetzter Spindel und eingebautem (integriertem) Druckbegrenzungsventil. Screw pump with inserted spindle and built-in (integrated) pressure relief valve.
Das Pumpengehäuse 1 der Schraubenspindelpumpe gemäß dem bevorzugten Ausführungsbeispiel der Erfindung besteht aus einem Flanschabschnitt 2 zur Montage der Pumpe an einem nicht weiter dargestellten Bauteil und einem The pump housing 1 of the screw pump according to the preferred embodiment of the invention consists of a flange portion 2 for mounting the pump to a non-illustrated component and a
Spindelgehäuseabschnitt 4, das ein zum Flanschabschnitt 2 separates Gehäuseteil darstellt und mit dem Flanschabschnitt 2 verschraubt, verstemmt oder vernietet ist. Spindle housing portion 4, which is a separate housing part to the flange portion 2 and bolted to the flange portion 2, caulked or riveted.
Im Flanschabschnitt 2 ist eine Druckkammer 6 ausgeformt, die über eine In the flange portion 2, a pressure chamber 6 is formed, which has a
Verbindungsbohrung 8 mit einer Spindelkammer 10 innerhalb des Connecting bore 8 with a spindle chamber 10 within the
Spindelgehäuseabschnitts 4 verbunden ist. Des Weiteren ist in axialer Verlängerung zur Verbindungsbohrung 8 eine Eingangsbohrung 12 im Flanschabschnitt 2 ausgebildet, die ebenfalls in die Druckkammer 6 einmündet und zu einer dem Spindle housing portion 4 is connected. Furthermore, in the axial extension of the connecting hole 8, an inlet bore 12 is formed in the flange portion 2, which also opens into the pressure chamber 6 and to a the
Spindelgehäuseabschnitt 4 gegenüberliegenden flanschartigen Außenseite des Spindle housing portion 4 opposite flange outer side of the
Flanschabschnitts 2 führt. An dieser Außenseite ist ein Pumpendeckel 14 Flange section 2 leads. On this outside is a pump cover 14
aufgeschraubt, in dem ebenfalls eine Durchgangsbohrung 16 ausgeformt ist, die axial zur Verbindungsbohrung 8 und Eingangsbohrung 12 des Flanschabschnitts 2 screwed, in which also a through hole 16 is formed, which is axially to the connecting hole 8 and the inlet bore 12 of the flange portion of the second
ausgerichtet ist. In die Bohrungen 8, 12, 16 ist der Schaft 18 einer Spindel 20 eingesetzt, derart, dass dieser in der Durchgangsbohrung 16 des Pumpendeckels 14 mittels eines Kugeloder Wälzlagers 22 drehbar gelagert ist. Im Bereich der Eingangsbohrung 12 des Flanschabschnitts 2 ist der Spindelschaft 18 mit einem Dichtungsabschnitt 24 is aligned. In the holes 8, 12, 16, the shaft 18 of a spindle 20 is inserted, such that it is rotatably mounted in the through hole 16 of the pump cover 14 by means of a ball or roller bearing 22. In the region of the inlet bore 12 of the flange section 2, the spindle shaft 18 is provided with a sealing section 24
ausgeformt, der in dichtendem Gleiteingriff mit der Eingangsbohrung 12 des formed in sealing sliding engagement with the input bore 12 of the
Flanschabschnitts 2 steht. Die Spindel 20 bildet schließlich einen Wendelabschnitt 26 aus, der in der Spindelkammer 10 des Spindelgehäuseabschnitts 4 aufgenommen ist. Die Druckkammer 6 im Flanschabschnitt 2 ist dabei dezentral bezüglich des Flange section 2 is. The spindle 20 finally forms a helical section 26 which is received in the spindle chamber 10 of the spindle housing section 4. The pressure chamber 6 in the flange portion 2 is decentralized with respect to the
Spindelschafts 18 ausgeformt, das heißt, die Druckkammer 6 bildet bezüglich des Spindelschafts 18 beziehungsweise der im Flanschabschnitt 2 ausgebildeten Spindle shaft 18 is formed, that is, the pressure chamber 6 forms with respect to the spindle shaft 18 and formed in the flange portion 2
Verbindungsbohrung 8 einen radial ausgelagerten Abschnitt 6a. In diesem radial versetzten beziehungsweise ausgelagerten Abschnitt 6a mündet eine Auslassbohrung 27 der Schraubenspindelpumpe. Des Weiteren hat der Flanschabschnitt 2 eine daran angeformte ringförmige Flanschplatte 29, welche die Druckkammer 6 umgibt und dabei die Gehäusewand des Flanschabschnitts 2 verstärkt. Connecting bore 8 a radially outsourced section 6a. In this radially offset or outsourced section 6a opens an outlet bore 27 of the screw pump. Furthermore, the flange portion 2 has an annular flange plate 29 formed thereon, which surrounds the pressure chamber 6 and thereby reinforces the housing wall of the flange portion 2.
Ein Druckbegrenzungsventil 28 ist parallel zum Spindelschaft 18 in Höhe der Verbindungsbohrung 8 in den Flanschabschnitt 2 eingesetzt und mündet dabei in den radial versetzten beziehungsweise ausgelagerten Abschnitt 6a der Druckkammer 6. Im Konkreten bildet der Flanschabschnitt 2 in diesem Bereich eine Materialansammlung 2a, in welche die Druckkammer 6 innenseitig ausgeformt ist und welche zur A pressure relief valve 28 is inserted parallel to the spindle shaft 18 in the amount of the connecting hole 8 in the flange 2 and opens into the radially offset or outsourced portion 6a of the pressure chamber 6. Concretely, the flange portion 2 forms in this area a material accumulation 2a, in which the pressure chamber 6 is formed on the inside and which for
Ausformung einer Druckbegrenzungsventilbohrung 30 koaxial zur Verbindungsbohrung 8 des Flanschabschnitts 2 geeignet ist. Demzufolge positioniert sich das Forming a pressure relief valve bore 30 coaxial with the connecting hole 8 of the flange portion 2 is suitable. As a result, this positions itself
Druckbegrenzungsventil 28 in einem Bereich zwischen dem Spindelgehäuseabschnitt 4 und der Flanschplatte 29 in etwa auf Höhe der Verbindungsbohrung 8 sowie koaxial zum Spindelschaft 18. Pressure limiting valve 28 in a region between the spindle housing portion 4 and the flange plate 29 approximately at the level of the connecting bore 8 and coaxial with the spindle shaft 18th
Das Druckbegrenzungsventil 28 besteht hierbei aus einem Ventilkörper 32 in Form eines Kolbens, dessen Kolbenspitze 34 auf einem Ventilsitz 36 dichtend aufsitzt, der im Pumpengehäuse 1 , das heißt im Flanschabschnitt 2 ausgebildet ist. Der Ventilkörper 32 ist hierbei mittels einer Feder 38 auf den Ventilsitz 36 vorgespannt, deren Vorspannkraft über eine Stellschraube 40 einstellbar ist, der ebenfalls in den Flanschabschnitt 2 des Pumpengehäuses 1 eingeschraubt ist. Unterhalb des Ventilsitzes 32 ist eine im Wesentlichen senkrecht zum Druckbegrenzungsventil 28 in den Flanschabschnitt 2 eingebohrte Ablassbohrung 42 vorgesehen, die mit einem nicht weiter gezeigten Fluidtank verbunden ist. Sobald innerhalb der Druckkammer 6 ein über die The pressure limiting valve 28 in this case consists of a valve body 32 in the form of a piston whose piston tip 34 is sealingly seated on a valve seat 36, which is formed in the pump housing 1, that is, in the flange section 2. The valve body 32 is in this case biased by a spring 38 on the valve seat 36, the biasing force is adjustable via an adjusting screw 40 which is also screwed into the flange portion 2 of the pump housing 1. Below the valve seat 32 is a in Essentially provided perpendicular to the pressure relief valve 28 in the flange portion 2 drilled drain hole 42 which is connected to a fluid tank, not shown. Once inside the pressure chamber 6 via the
Vorspannfeder 38 eingestellter Druck überschritten wird, öffnet das Prelock spring 38 set pressure is exceeded, opens
Druckbegrenzungsventil 28 und entspannt den Überdruck unmittelbar in den Fluidtank. Pressure relief valve 28 and relaxes the pressure directly into the fluid tank.
Abschließend sei darauf hingewiesen, dass die Lage und Ausrichtung des Finally, it should be noted that the location and orientation of the
Druckbegrenzungsventils 28 nicht auf das vorstehend beschriebene Pressure relief valve 28 not on the above-described
Ausführungsbeispiel beschränkt ist. Viel mehr könnte das Druckbegrenzungsventil 28 auch in Radialrichtung bezüglich der Verbindungsbohrung 8 in den Flanschabschnitt 2 eingesetzt sein, wobei in diesem Fall der Ventilkolben 32 des Druckbegrenzungsventils 28 eine parallel zur Verbindungsbohrung 8 verlaufende Druckentspannungsbohrung zwischen der Druckkammer 6 und einem Tankanschluss öffnet oder schließt. Auch ist es denkbar, das Druckbegrenzungsventil 28 oberhalb der Flanschplatte 26, das heißt zwischen der Flanschplatte 26 und dem Pumpendeckel 14 in den Flanschabschnitt 2 einzusetzen, wobei in diesem Fall die für die Anflanschfläche des Pumpendeckels 14 erforderliche Materialanhäufung des Flanschabschnitts 2 zum Einbau des Embodiment is limited. Much more could the pressure limiting valve 28 also be inserted in the radial direction with respect to the connection bore 8 in the flange section 2, in which case the valve piston 32 of the pressure limiting valve 28 opens a parallel to the connecting hole 8 extending pressure relief hole between the pressure chamber 6 and a tank connection or closes. It is also conceivable to use the pressure limiting valve 28 above the flange plate 26, that is, between the flange plate 26 and the pump cover 14 in the flange 2, in which case the required for the Anflanschfläche the pump cover 14 accumulation of material of the flange portion 2 for installation of the
Druckbegrenzungsventils 28 genutzt werden kann. Pressure relief valve 28 can be used.
Bezuqszeichenliste LIST OF REFERENCES
Pumpengehäuse pump housing
Flanschabschnitt flange
Spindelgehäuseabschnitt Spindle housing section
Druckkammer pressure chamber
Ausgelagerter Kammerabschnitt Verbindungsbohrung  Outsourced chamber section connecting bore
Spindelkammer spindle chamber
Eingangsbohrung inlet bore
Pumpendeckel pump cover
Durchgangsbohrung Through Hole
Spindelschaft spindle shaft
Spindel spindle
Wälzlager roller bearing
Dichtungsabschnitt sealing section
Wendelabschnitt filament section
Auslassbohrung outlet bore
Druckbegrenzungsventil Pressure relief valve
Flanschplatte flange
Ventilbohrung valve bore
Ventilkörper valve body
Kolbenspitze plunger tip
Ventilsitz valve seat
Vorspannfeder biasing spring
Stellschraube screw
Ablassbohrung drain hole

Claims

Patentansprüche claims
1. Schraubenspindelpumpe mit einem Pumpengehäuse (1 ), an dem ein 1. Screw pump with a pump housing (1), on which a
Flanschabschnitt (2) zur Montage der Pumpe ausgeformt ist und mit einem integrierten Druckbegrenzungsventil (28), dadurch gekennzeichnet, dass das Druckbegrenzungsventil (28) im Flanschabschnitt (2) des Pumpengehäuses (1 ) in dieses eingebaut ist.  Flange portion (2) for mounting the pump is formed and with an integrated pressure relief valve (28), characterized in that the pressure limiting valve (28) in the flange portion (2) of the pump housing (1) is installed in this.
2. Schraubenspindelpumpe nach Anspruch 1 , dadurch gekennzeichnet, dass eine Druckkammer (6) im Flanschabschnitt (2) des Pumpengehäuses (1 ) ausgeformt ist und das Druckbegrenzungsventil (28) unmittelbar mit der 2. Screw pump according to claim 1, characterized in that a pressure chamber (6) in the flange portion (2) of the pump housing (1) is formed and the pressure relief valve (28) directly with the
Druckkammer (6) fluidverbunden ist.  Pressure chamber (6) is fluidly connected.
3. Schraubenspindelpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Druckbegrenzungsventil (28) mit einem Fluidtank verbunden ist, um einen Überdruck in der Druckkammer (6) in den Fluidtank zu entspannen. 3. Screw pump according to claim 1 or 2, characterized in that the pressure limiting valve (28) is connected to a fluid tank in order to relax an overpressure in the pressure chamber (6) in the fluid tank.
4. Schraubenspindelpumpe nach einem der vorstehenden Ansprüche , dadurch gekennzeichnet, dass das Pumpengehäuse (1 ) aus zumindest zwei separaten Gehäuseteilen besteht, nämlich dem Flanschabschnitt (2) und einem 4. Screw pump according to one of the preceding claims, characterized in that the pump housing (1) consists of at least two separate housing parts, namely the flange portion (2) and a
Spindelgehäuseabschnitt (4), die miteinander verschraubt, verstemmt oder vernietet sind.  Spindle housing section (4), which are bolted together, caulked or riveted.
5. Schraubenspindelpumpe nach Anspruch 4, gekennzeichnet durch zumindest eine Spindel (20), deren Spindelschaft (18) durch die Druckkammer (6) im Flanschabschnitt (2) hindurchführt ist und deren Wendelabschnitt (26) in eine Spindelkammer (10) ragt, die im Spindelgehäuseabschnitt (4) ausgebildet ist. 5. Screw pump according to claim 4, characterized by at least one spindle (20) whose spindle shaft (18) passes through the pressure chamber (6) in the flange portion (2) and whose spiral portion (26) projects into a spindle chamber (10) in the Spindle housing portion (4) is formed.
6. Schraubenspindelpumpe nach Anspruch 4, dadurch gekennzeichnet, dass das Druckbegrenzungsventil (28) im wesentlichen parallel zur Spindel (20) ausgerichtet und co-axial zum Spindelschaft (18) in etwa auf dessen Höhe in den Flanschabschnitt (2) eingesetzt ist. 6. screw pump according to claim 4, characterized in that the pressure limiting valve (28) is aligned substantially parallel to the spindle (20) and co-axial to the spindle shaft (18) is inserted approximately at its height in the flange portion (2).
7. Schraubenspindelpumpe nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass am Spindelschaft (18) ein Dichtungsabschnitt (24) ausgeformt ist, der mit dem Flanschabschnitt (2) am Eintritt in die Druckkammer (6) in Dicht-Gleit- Eingriff ist und somit die Druckkammer (6) gegenüber der Atmosphäre abdichtet. 7. Screw pump according to claim 5 or 6, characterized in that on the spindle shaft (18) a sealing portion (24) is formed, which is in engagement with the flange portion (2) at the inlet into the pressure chamber (6) in sealing sliding engagement and thus the pressure chamber (6) seals against the atmosphere.
8. Schraubenspindelpumpe nach einem der Ansprüche 5 bis 7, dadurch 8. Screw pump according to one of claims 5 to 7, characterized
gekennzeichnet, dass die Druckkammer (6) bezüglich der Spindel (20) dezentral ausgeformt ist und das Druckbegrenzungsventil (28) in den bezüglich der Spindel (20) radial weiter ausladenden Abschnitt (6a) der Druckkammer (6) mündet.  characterized in that the pressure chamber (6) with respect to the spindle (20) is formed decentrally and the pressure relief valve (28) in the relative to the spindle (20) radially further extending portion (6a) of the pressure chamber (6) opens.
9. Schraubenspindelpumpe nach einem der vorstehenden Ansprüche 9. Screw pump according to one of the preceding claims
gekennzeichnet durch eine Flanschplatte (26), die am Flanschabschnitt (2) des Pumpengehäuses (1 ) ausgeformt ist und die Druckkammer (6)  characterized by a flange plate (26) which is formed on the flange portion (2) of the pump housing (1) and the pressure chamber (6)
ringscheibenförmig umgibt.  surrounds ring-shaped.
10. Schraubenspindelpumpe nach Anspruch 9 , dadurch gekennzeichnet, dass das Druckbegrenzungsventil (28) im Bereich zwischen der Flanschplatte (26) und dem Spindelgehäuseabschnitt (4) in die Gehäusewand des 10. Screw pump according to claim 9, characterized in that the pressure limiting valve (28) in the region between the flange plate (26) and the spindle housing portion (4) in the housing wall of the
Flanschabschnitts (2) eingesetzt ist.  Flange section (2) is inserted.
EP10754884.4A 2009-11-28 2010-09-15 Screw pump having an integrated pressure limiting valve Active EP2504578B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009056218A DE102009056218A1 (en) 2009-11-28 2009-11-28 Screw pump with integrated pressure relief valve
PCT/EP2010/005657 WO2011063870A2 (en) 2009-11-28 2010-09-15 Screw pump having an integrated pressure limiting valve

Publications (3)

Publication Number Publication Date
EP2504578A2 true EP2504578A2 (en) 2012-10-03
EP2504578B1 EP2504578B1 (en) 2016-09-07
EP2504578B2 EP2504578B2 (en) 2019-11-06

Family

ID=43927184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10754884.4A Active EP2504578B2 (en) 2009-11-28 2010-09-15 Screw pump having an integrated pressure limiting valve

Country Status (7)

Country Link
US (1) US9404494B2 (en)
EP (1) EP2504578B2 (en)
JP (1) JP5693601B2 (en)
CN (1) CN103026069B (en)
BR (1) BR112012012684B1 (en)
DE (1) DE102009056218A1 (en)
WO (1) WO2011063870A2 (en)

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DE102013102031B4 (en) 2013-03-01 2016-05-12 Netzsch Pumpen & Systeme Gmbh From at least two parts formed screw pump
KR20160059748A (en) * 2014-11-19 2016-05-27 삼성에스디아이 주식회사 Electrode assembly and battery pack having same
GB2549141A (en) * 2016-04-08 2017-10-11 Delphi Int Operations Luxembourg Sarl Fuel pump
DE102017210771B4 (en) * 2017-06-27 2019-05-29 Continental Automotive Gmbh Screw pump, fuel delivery unit and fuel delivery unit
DE102018109866A1 (en) 2018-04-24 2019-10-24 Nidec Gpm Gmbh Controllable lubricating oil conveyor system for internal combustion engines
DE102018131587A1 (en) 2018-12-10 2020-06-10 Nidec Gpm Gmbh Adjustable screw pump
KR102172863B1 (en) * 2020-07-30 2020-11-02 심재만 oil pump
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Also Published As

Publication number Publication date
EP2504578B1 (en) 2016-09-07
BR112012012684B1 (en) 2020-09-01
JP2013512372A (en) 2013-04-11
CN103026069B (en) 2016-08-03
WO2011063870A2 (en) 2011-06-03
US20130022458A1 (en) 2013-01-24
WO2011063870A3 (en) 2013-01-24
BR112012012684A2 (en) 2016-08-23
US9404494B2 (en) 2016-08-02
CN103026069A (en) 2013-04-03
EP2504578B2 (en) 2019-11-06
DE102009056218A1 (en) 2011-06-01
JP5693601B2 (en) 2015-04-01

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