WO2003087584A1 - Hydro damper - Google Patents

Hydro damper Download PDF

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Publication number
WO2003087584A1
WO2003087584A1 PCT/EP2003/003460 EP0303460W WO03087584A1 WO 2003087584 A1 WO2003087584 A1 WO 2003087584A1 EP 0303460 W EP0303460 W EP 0303460W WO 03087584 A1 WO03087584 A1 WO 03087584A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection
pump
housing
connection block
damper
Prior art date
Application number
PCT/EP2003/003460
Other languages
German (de)
French (fr)
Inventor
Herbert Baltes
Gernot Rupp
Original Assignee
Hydac Technology Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydac Technology Gmbh filed Critical Hydac Technology Gmbh
Priority to US10/511,583 priority Critical patent/US20050129549A1/en
Priority to DE50303482T priority patent/DE50303482D1/en
Priority to JP2003584504A priority patent/JP4125680B2/en
Priority to EP03714916A priority patent/EP1495231B1/en
Publication of WO2003087584A1 publication Critical patent/WO2003087584A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators

Definitions

  • the invention relates to a hydraulic damper for attenuating pressure and / or sound vibrations in systems for the operation of which pressurized fluids can be used.
  • system-related processes of different types can lead to pressure fluctuations, for example by suddenly connecting rooms with different pressure levels, actuating shut-off and control valves with short opening and closing times and in particular by non-uniformities when operating positive displacement pumps, resulting in pump pulsations, or even Activation or deactivation of positive displacement pumps.
  • hydraulic dampers can be based on the principle of hydropneumatic bladder and membrane accumulators or can be designed as reflection dampers (silencers).
  • a general requirement for the effectiveness of hydraulic dampers is that the damper housing encloses a sufficiently large volume, which in turn leads to correspondingly large dimensions of the damper housing.
  • the hydraulic pump contains a limited installation space at the output of which a hydraulic damper which attenuates the pressure vibrations and sound vibrations of the pump pulsation has to be connected, problems often arise due to the space requirement of a hydraulic damper to be accommodated with a sufficiently large damper housing.
  • Such a problem occurs increasingly in connection with hydraulic systems of injection molding systems, where a good damping effect is required at the outlet of the hydraulic pumps in question, but in general only a very limited installation space is available for large-volume damper housings.
  • the object of the invention is to provide a hydraulic damper, the construction of which enables the connection to an associated hydraulic system even with limited installation space and with a sufficiently large volume of the damper housing.
  • a damper housing with a main dimension defining a longitudinal axis of the housing
  • connection device assigned to the connection block for attaching the connection block and thus the damper housing to the
  • damper housing in selectable rotational positions, based on a connection axis that runs transversely to the longitudinal axis of the housing.
  • the damper housing can be accommodated in such an orientation in the relevant installation space that the main dimension of the damper housing extends in a direction that optimally utilizes the space.
  • damper housings with an elongated design and a relatively large volume can also be accommodated in cramped machine rooms.
  • the possibility offered by the invention of choosing the rotational position of the damper housing about a connecting axis running transversely to its longitudinal axis also enables a direct connection, for example at the outlet of an associated hydraulic pump. Even under cramped installation conditions, for example, hydraulic dampers of the reflection type, in which a relatively large volume of the damper housing is required, can be connected directly to a hydraulic pump in question with a limited available installation space.
  • the connecting axis preferably runs at least approximately perpendicular to the main dimension of the damper housing that defines the longitudinal axis of the housing.
  • connection device has a pump connection piece which forms the fluid connection between the connection block and a hydraulic pump and which can be fixed at the outlet of the hydraulic pump in selectable rotational positions related to the connection axis.
  • the pump connecting piece can be the Connecting device a ring body attachable to the outlet of the pump with a ring of bores arranged along its circumference, of which those which correspond to the desired rotational positions of the connection block with respect to the connection axis, can be selected for the engagement of fastening screws provided on the connection block ,
  • a connection of the hydraulic damper to the outlet of the pump is possible in rotation steps which correspond to the division of the bores of the bore ring in the pump connection piece.
  • the pump connection piece has a circular end flange which can be fixed in the selected rotational position, with reference to the connecting axis, by means of semi-ring-type SAE flange clamping jaws which can be screwed to the SAE connecting parts of the pump outlet, a stepless selection of the rotational positions is possible.
  • FIG. 1 is a side view of an exemplary embodiment of the hydraulic damper according to the invention, drawn in a highly schematically simplified manner;
  • FIG. 2 shows a horizontal section of the embodiment of FIGS. 1 and 1 drawn on a larger scale than FIG. 1
  • FIG. 3 shows a perspective oblique view of an end region of a second exemplary embodiment of the hydraulic damper, which is drawn on an even larger scale and broken away and broken off, and which is connected to the outlet of a hydraulic pump via an SAE connection.
  • 1 and 2 show a first embodiment of the invention, which is a reflection damper (silencer) which has an elongated damper housing 1, the main dimension of which defines a housing longitudinal axis 3.
  • the damper housing 1 is in fluid connection at its one end on the right in the figures with a connection block 5, which in turn is connected via a pump connection piece 7 to the outlet of a hydraulic pump (not shown).
  • the storage housing 1 contains a damping tube 9 which extends coaxially to the longitudinal axis 3 between the inlet end 11 and outlet end 13 of the damper housing 1.
  • the damping tube 9 has slot openings 15 in the region of its half length for coupling the fluid vibrations in the damping tube 9 to the fluid volume 17 surrounding it within the damper housing 1. Bores 19 form a permanent ventilation of the space containing the volume 1 7, so that the hydraulic damper does not need to be prefilled for starting because air accumulations are discharged through the bores 1 9.
  • the damper housing each has an internal thread 21, into which screw-in pieces 23 are screwed, in the inner bore of which is concentric with the longitudinal axis 3, the ends of the damping tube 9 are received.
  • the damping tube 9 is elastically supported by O-rings 25 seated in the inner bore of the screw-in pieces 23, so that the tube 9 does not generate any rattling noises during operation without narrow tolerances being necessary.
  • connection block 5 forms with its inner chamber 33, which is in fluid communication with the damper housing 1, a prechamber for the resonator system located in the damper housing 1. With its bottom-side opening 35, the chamber 33 of the connection block 5 is in fluid communication with the outlet of the hydraulic pump (not shown) through the pump connection 7.
  • connection block 5 has four bores 37 for the engagement of fastening screws, not shown, with which the connection block 5 can be screwed to the pump connection piece 7.
  • 1 and 2 which is designed as an annular body and is in turn connectable to the outlet of the hydraulic pump, has a ring of bores 39 for interaction with the bores 37 on the connecting block, which bores are concentric with a connecting axis 41, which is perpendicular to the longitudinal axis 3 of the housing and is defined by the center of the opening 35 connecting the chamber 33 to the hydraulic pump, is arranged on the same radius as the bores 37 of the connection block 5.
  • connection block 5 can be rotated about the connection axis 41 in order to make an alignment between the desired bores 39 of the bore ring on the pump connection piece 7 and the bores 37 on the connection block 5, so that the damper housing 1 with its longitudinal axis 3 relates to the desired rotational positions, based on the connection axis 41 can be aligned.
  • the longitudinal extent of the damper housing 1 can therefore be rotated into a position in which an optimal use of space is given in the respective installation conditions. In other words, this means that even with difficult installation conditions, relatively large-volume damper housings 1 can be accommodated.
  • the setting of the rotational position of the damper housing 1 can take place in rotational steps which correspond to the division of the bores 39 on the circumference of the pump connection piece 7 designed as an annular body
  • the exemplary embodiment of FIG. 3 enables the rotational position to be adjusted continuously of the damper housing 1 about the connecting axis 41.
  • the pump connection piece 7 in the second exemplary embodiment is not designed as an annular body with a circumferential bore ring, but in the form of a circular cylindrical hollow body which serves as a fluid supply pipe which connects the inner chamber 3 of the connection block 5 with the schematically indicated in Fig. 3, designated 43 of the hydraulic pump.
  • the hollow body of the pump connecting piece 7, which is concentric with the connecting axis 41, has a wall opening 45 for the fluid connection with the inner chamber 33 of the connecting block 5, said wall opening being aligned with the longitudinal axis 3 of the damper housing 1.
  • the pump connection piece 7 At the open end protruding from the connection block 5, which is to be attached for the fluid inlet at the pump outlet 43, the pump connection piece 7 has an end flange 47.
  • the pump connection piece 7 can be fixed at the pump outlet 43 by means of half-ring-like flange clamping jaws 49, as are customary for connection connections according to the SAE standard 0 518).
  • the rotational position about the connecting axis 41 can be selected continuously as desired.
  • damper housing 1 of a reflection damper shown in the two exemplary embodiments
  • damper systems of another function could equally be attached to the connection block 5, for example hydraulic dampers, which are based on the principle of hydropneumatic bladder and diaphragm accumulators.
  • the hydraulic damper according to the invention can be delivered in the form of original equipment for a specific machine type of a plastic injection molding machine. Depending on the space available on the respective machine, preferred holes are then provided on the pump connection piece via the existing drilling pattern, and a complicated drilling pattern on the pump connection piece can then be dispensed with in the case of subsequent deliveries; on the contrary, it is then possible to select a specific drilling pattern in which the predefined hydraulic damper assumes a desired position on a plastic injection molding machine in relation to the type of machine intended for it.

Abstract

Disclosed is a hydro damper for absorbing pressure oscillations and/or acoustic vibrations in systems which are operated by means of pressurized fluids. The inventive hydro damper is provided with a housing (1) having a leading dimension which defines a longitudinal axis (3) of the housing, a connection block (5) fluidically connecting the damper housing (1) to the corresponding system, and a linking device (7, 47, 49) which is assigned to the connection block (5) so as to mount the connection block (5), and consequently the damper housing (1), on the system in selected rotational positions relative to an axis of connection (41) that runs perpendicular to the longitudinal axis (3) of the housing.

Description

Hydrodämpfer hydraulic dampers
Die Erfindung bezieht sich auf einen Hydrodämpfer zur Abschwächung von Druck- und/oder Schallschwingungen bei Systemen, zu deren Betrieb Druckfluide einsetzbar sind.The invention relates to a hydraulic damper for attenuating pressure and / or sound vibrations in systems for the operation of which pressurized fluids can be used.
In Hydrosystemen können anlagebedingte Vorgänge unterschiedlicher Art zu Druckschwankungen führen, etwa durch schlagartiges Verbinden von Räumen mit unterschiedlichem Druckniveau, Betätigung von Absperr- und Regelarmaturen mit kurzen Öffnungs- und Schließzeiten und insbesondere durch Ungleichförmigkeiten beim Betrieb von Verdrängerpumpen, wobei sich Pumpenpulsationen ergeben, oder auch durch Zu- oder Abschaltvorgänge von Verdrängerpumpen.In hydro systems, system-related processes of different types can lead to pressure fluctuations, for example by suddenly connecting rooms with different pressure levels, actuating shut-off and control valves with short opening and closing times and in particular by non-uniformities when operating positive displacement pumps, resulting in pump pulsations, or even Activation or deactivation of positive displacement pumps.
Zur Abschwächung von Druckschwankungen, periodischen Druckschwingungen oder resultierenden Schallschwingungen sind Dämpferanordnungen unterschiedlicher Bauweise in Gebrauch. So können Hydrodämpfer auf dem Prinzip hydropneumatischer Blasen- und Membranspeicher basieren oder als Reflexionsdämpfer (Silencer) ausgebildet sein.Damper arrangements of various designs are used to attenuate pressure fluctuations, periodic pressure fluctuations or resulting sound vibrations. For example, hydraulic dampers can be based on the principle of hydropneumatic bladder and membrane accumulators or can be designed as reflection dampers (silencers).
Allgemeine Voraussetzung für die Wirksamkeit von Hydrodämpfern ist, dass das Dämpfergehäuse ein ausreichend großes Volumen umschließt, was wiederum zu entsprechend großen Abmessungen des Dämpfergehäuses führt. Bei Hydrosystemen in Anlagen, bei denen im Maschinenraum, der die Hydraulikpumpe enthält, an deren Ausgang ein die Druckschwingungen und Schallschwingungen der Pumpenpulsation abschwächender Hydrodämpfer angeschlossen werden muß, nur ein begrenzter Einbauraum zur Verfügung steht, ergeben sich vielfach Probleme aufgrund des Raumbedar- fes eines unterzubringenden Hydrodämpfers mit ausreichend großvolumi- gem Dämpfergehäuse. Ein solches Problem tritt verstärkt in Verbindung mit Hydrauliksystemen von Spritzgießanlagen auf, wo eine gute Dämpferwirkung am Ausgang betreffender Hydraulikpumpen zu fordern ist, im allgemeinen jedoch nur ein sehr begrenzter Einbauraum für großvolumige Dämpfergehäuse zur Verfügung steht.A general requirement for the effectiveness of hydraulic dampers is that the damper housing encloses a sufficiently large volume, which in turn leads to correspondingly large dimensions of the damper housing. In hydrosystems in systems in which in the machine room, the If the hydraulic pump contains a limited installation space at the output of which a hydraulic damper which attenuates the pressure vibrations and sound vibrations of the pump pulsation has to be connected, problems often arise due to the space requirement of a hydraulic damper to be accommodated with a sufficiently large damper housing. Such a problem occurs increasingly in connection with hydraulic systems of injection molding systems, where a good damping effect is required at the outlet of the hydraulic pumps in question, but in general only a very limited installation space is available for large-volume damper housings.
Die Erfindung stellt sich die Aufgabe, einen Hydrodämpfer zur Verfügung zu stellen, dessen Bauweise die Verbindung mit einem zugehörigen Hydro- system auch bei begrenztem Einbauraum und bei ausreichend großem Vo- lumen des Dämpfergehäuses ermöglicht.The object of the invention is to provide a hydraulic damper, the construction of which enables the connection to an associated hydraulic system even with limited installation space and with a sufficiently large volume of the damper housing.
Gemäß der Erfindung ist diese Aufgabe durch einen Hydrodämpfer gelöst, der entsprechend dem Anspruch 1 aufweist:According to the invention, this object is achieved by a hydraulic damper, which has according to claim 1:
• ein Dämpfergehäuse mit einer eine Gehäuselängsachse definierenden Hauptabmessung;A damper housing with a main dimension defining a longitudinal axis of the housing;
• einen Anschlußblock für die Fluidverbindung des Dämpfergehäuses mit dem betreffenden System und• a connection block for the fluid connection of the damper housing with the system in question and
• eine dem Anschlußblock zugeordnete Verbindungseinrichtung zum An- bringen des Anschlußblockes und damit des Dämpfergehäuses an dem• A connection device assigned to the connection block for attaching the connection block and thus the damper housing to the
System in wählbaren Drehstellungen, bezogen auf eine Verbindungsachse, die quer zur Gehäuselängsachse verläuft. Dadurch, dass erfindungsgemäß das Dämpfergehäuse mit dem zugehörigen Hydrosystem in gewünschter Drehstellung verbindbar ist, läßt sich das Dämpfergehäuse in einer solchen Orientierung im betreffenden Einbauraum unterbringen, dass sich die Hauptabmessung des Dämpfergehäuses in einer den Raum optimal ausnützenden Richtung erstreckt. Somit lassen sich auch Dämpfergehäuse in langgestreckter Bauweise und mit verhältnismäßig großem Volumen in beengten Maschinenräumen unterbringen. Die durch die Erfindung gebotene Möglichkeit der Wahl der Drehstellung des Dämpfergehäuses um eine zu seiner Längsachse quer verlaufende Verbindungsachse ermöglicht auch einen unmittelbaren Anschluß, beispielsweise am Ausgang einer zugehörigen Hydraulikpumpe. Auch unter beengten Einbaubedingungen lassen sich so beispielsweise Hydrodämpfer vom Reflexionstyp, bei denen ein verhältnismäßig großes Volumen des Dämpfergehäuses erforderlich ist, bei begrenztem, zur Verfügung stehendem Einbauraum unmittelbar an einer betreffenden Hydraulikpumpe anschließen.System in selectable rotational positions, based on a connection axis that runs transversely to the longitudinal axis of the housing. The fact that, according to the invention, the damper housing can be connected to the associated hydraulic system in the desired rotational position, the damper housing can be accommodated in such an orientation in the relevant installation space that the main dimension of the damper housing extends in a direction that optimally utilizes the space. This means that damper housings with an elongated design and a relatively large volume can also be accommodated in cramped machine rooms. The possibility offered by the invention of choosing the rotational position of the damper housing about a connecting axis running transversely to its longitudinal axis also enables a direct connection, for example at the outlet of an associated hydraulic pump. Even under cramped installation conditions, for example, hydraulic dampers of the reflection type, in which a relatively large volume of the damper housing is required, can be connected directly to a hydraulic pump in question with a limited available installation space.
Vorzugsweise verläuft die Verbindungsachse zu der die Gehäuselängsachse definierenden Hauptabmessung des Dämpfergehäuses zumindest näherungsweise senkrecht.The connecting axis preferably runs at least approximately perpendicular to the main dimension of the damper housing that defines the longitudinal axis of the housing.
Bei einer vorteilhaften Ausführungsform weist die Verbindungseinrichtung ein die Fluidverbindung zwischen dem Anschlußblock und einer Hydraulikpumpe bildendes Pumpenanschlußstück auf, das am Ausgang der Hydraulikpumpe in wählbaren, auf die Verbindungsachse bezogenen Dreh- Stellungen festlegbar ist.In an advantageous embodiment, the connection device has a pump connection piece which forms the fluid connection between the connection block and a hydraulic pump and which can be fixed at the outlet of the hydraulic pump in selectable rotational positions related to the connection axis.
Wenn der Ausgang der Pumpe für den Anschluß von Verbindungsteilen entsprechend der SAE-Norm vorgesehen ist, also ein entsprechendes Lochbild für Befestigungsschrauben aufweist, kann als Pumpenanschlußstück der Verbindungseinrichtung ein am Ausgang der Pumpe befestigbarer Ringkörper mit einem entlang seines Umfanges angeordneten Kranz von Bohrungen vorgesehen sein, von denen solche, die gewünschten Drehstellungen des Anschlußblockes, bezogen auf die Verbindungsachse, entsprechen, für den Eingriff von Befestigungsschrauben auswählbar sind, die am Anschlußblock vorgesehen sind. Bei solchen Ausführungsbeispielen ist eine Verbindung des Hydrodämpfers mit dem Ausgang der Pumpe in Drehschritten möglich, die der Teilung der Bohrungen des Bohrungskranzes im Pumpenanschlußstück entsprechen.If the output of the pump is intended for the connection of connecting parts according to the SAE standard, that is to say has a corresponding hole pattern for fastening screws, the pump connecting piece can be the Connecting device a ring body attachable to the outlet of the pump with a ring of bores arranged along its circumference, of which those which correspond to the desired rotational positions of the connection block with respect to the connection axis, can be selected for the engagement of fastening screws provided on the connection block , In such embodiments, a connection of the hydraulic damper to the outlet of the pump is possible in rotation steps which correspond to the division of the bores of the bore ring in the pump connection piece.
Wenn andererseits das Pumpenanschlußstück einen kreisrunden Endflansch aufweist, der in gewählter Drehstellung, bezogen auf die Verbindungsachse, mittels halbringartiger SAE-Flanschspannbacken festlegbar ist, die mit den SAE-Anschlußteilen des Ausganges der Pumpe verschraubbar sind, ist eine stufen lose Wahl der Drehstellungen möglich.If, on the other hand, the pump connection piece has a circular end flange which can be fixed in the selected rotational position, with reference to the connecting axis, by means of semi-ring-type SAE flange clamping jaws which can be screwed to the SAE connecting parts of the pump outlet, a stepless selection of the rotational positions is possible.
Nachstehend ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im einzelnen erläutert. Es zeigen:The invention is explained in detail below on the basis of exemplary embodiments illustrated in the drawing. Show it:
• Fig. 1 eine stark schematisch vereinfacht gezeichnete Seitenansicht eines Ausführungsbeispieles des erfindungsgemäßen Hydrodämpfers;• FIG. 1 is a side view of an exemplary embodiment of the hydraulic damper according to the invention, drawn in a highly schematically simplified manner;
• Fig. 2 einen gegenüber Fig. 1 in größerem Maßstab gezeichneten Horizontalschnitt des Ausführungsbeispieles von Fig. 1 und• FIG. 2 shows a horizontal section of the embodiment of FIGS. 1 and 1 drawn on a larger scale than FIG. 1
• Fig. 3 eine in noch größerem Maßstab sowie aufgebrochen und abge- brochen gezeichnete, perspektivische Schrägansicht eines Endbereiches eines zweiten Ausführungsbeispieles des Hydrodämpfers, der über eine SAE-Verbindung am Ausgang einer Hydraulikpumpe angeschlossen ist. Die Fig. 1 und 2 zeigen eine erste Ausführungsform der Erfindung wobei es sich um einen Reflexionsdämpfer (Silencer) handelt, der ein langgestrecktes Dämpfergehäuse 1 aufweist, dessen Hauptabmessung eine Gehäuselängsachse 3 definiert. Das Dämpfergehäuse 1 ist an seinem einen, in den Fig. rechts gelegenen Ende mit einem Anschlußblock 5 in Fluidverbindung, der wiederum über ein Pumpenanschlußstück 7 mit dem Ausgang einer nicht dargestellten Hydraulikpumpe verbunden ist.3 shows a perspective oblique view of an end region of a second exemplary embodiment of the hydraulic damper, which is drawn on an even larger scale and broken away and broken off, and which is connected to the outlet of a hydraulic pump via an SAE connection. 1 and 2 show a first embodiment of the invention, which is a reflection damper (silencer) which has an elongated damper housing 1, the main dimension of which defines a housing longitudinal axis 3. The damper housing 1 is in fluid connection at its one end on the right in the figures with a connection block 5, which in turn is connected via a pump connection piece 7 to the outlet of a hydraulic pump (not shown).
In der Eigenschaft als Hydrodämpfer vom Reflexionstyp, d. h. als Resonator mit Interferenzwirkung, enthält das Speichergehäuse 1 ein Dämpfungsrohr 9, das sich koaxial zur Längsachse 3 zwischen Eintrittsende 1 1 und Austrittsende 1 3 des Dämpfergehäuses 1 erstreckt. Das Dämpfungsrohr 9 weist im Bereich seiner halben Länge Schlitzöffnungen 15 für die Koppelung der Fluidschwingungen im Dämpfungsrohr 9 mit dem dieses umgebenden Fluidvolumen 1 7 innerhalb des Dämpfergehäuses 1 auf. Bohrungen 19 bilden eine permanente Entlüftung des das Volumen 1 7 enthaltenden Raumes, so dass der Hydrodämpfer für das Anfahren nicht vorgefüllt zu werden braucht, weil Luftansammlungen über die Bohrungen 1 9 abgeführt werden.As a reflection type hydraulic damper, i.e. H. as a resonator with interference effect, the storage housing 1 contains a damping tube 9 which extends coaxially to the longitudinal axis 3 between the inlet end 11 and outlet end 13 of the damper housing 1. The damping tube 9 has slot openings 15 in the region of its half length for coupling the fluid vibrations in the damping tube 9 to the fluid volume 17 surrounding it within the damper housing 1. Bores 19 form a permanent ventilation of the space containing the volume 1 7, so that the hydraulic damper does not need to be prefilled for starting because air accumulations are discharged through the bores 1 9.
Am Eintrittsende 1 1 und am Austrittsende 13 weist das Dämpfergehäuse jeweils ein Innengewinde 21 auf, in die Einschraubstücke 23 eingeschraubt sind, in deren zur Längsachse 3 konzentrischer innerer Bohrung die Enden des Dämpfungsrohres 9 aufgenommen sind. Durch in der inneren Bohrung der Einschraubstücke 23 sitzende O-Ringe 25 ist das Dämpfungsrohr 9 ela- stisch gelagert, so dass das Rohr 9, ohne dass enge Toleranzen erforderlich wären, im Betrieb keine Klappergeräusche erzeugt.At the inlet end 11 and at the outlet end 13, the damper housing each has an internal thread 21, into which screw-in pieces 23 are screwed, in the inner bore of which is concentric with the longitudinal axis 3, the ends of the damping tube 9 are received. The damping tube 9 is elastically supported by O-rings 25 seated in the inner bore of the screw-in pieces 23, so that the tube 9 does not generate any rattling noises during operation without narrow tolerances being necessary.
Am Eintrittsende 1 1 und am Austrittsende 13 befindet sich am Dämpfergehäuse 1 jeweils ein Außengewinde 27. Auf das Außengewinde 27 am Aus- trittsende 13 ist ein Anschlußflansch 29 aufgeschraubt, um die Anschlußverbindung zu einem Verbraucher herzustellen, beispielsweise mittels einer SAE-Anschlußeinrichtung an einem Druckschlauch oder dergleichen. Mit dem Außengewinde 27 am Eintrittsende 1 1 ist das Dämpfergehäuse 1 mit dem Anschlußblock 5 verschraubt, wobei eine Gewindedichtung 31 am Außengewinde 27 vorgesehen ist. Der Anschlußblock 5 bildet mit seiner inneren Kammer 33, die mit dem Dämpfergehäuse 1 in Fluidverbindung ist, eine Vorkammer für das im Dämpfergehäuse 1 befindliche Resonatorsystem. Mit ihrer bodenseitigen Öffnung 35 steht die Kammer 33 des An- Schlußblockes 5 durch das Pumpenanschluß 7 hindurch mit dem Ausgang der nicht gezeigten Hydraulikpumpe in Fluidverbindung.At the inlet end 11 and at the outlet end 13 there is an external thread 27 on the damper housing 1. end 13 is a connection flange 29 screwed to establish the connection to a consumer, for example by means of an SAE connection device on a pressure hose or the like. With the external thread 27 at the inlet end 11, the damper housing 1 is screwed to the connection block 5, a thread seal 31 being provided on the external thread 27. The connection block 5 forms with its inner chamber 33, which is in fluid communication with the damper housing 1, a prechamber for the resonator system located in the damper housing 1. With its bottom-side opening 35, the chamber 33 of the connection block 5 is in fluid communication with the outlet of the hydraulic pump (not shown) through the pump connection 7.
Wie aus Fig. 2 zu ersehen ist, weist der Anschlußblock 5 vier Bohrungen 37 für den Eingriff von nicht dargestellten Befestigungsschrauben auf, mit de- nen der Anschlußblock 5 mit dem Pumpenanschlußstück 7 verschraubbar ist. Das bei dem Ausführungsbeispiel von Fig. 1 und 2 als Ringkörper ausgebildete Pumpenanschlußstück 7, das seinerseits mit dem Ausgang der Hydraulikpumpe verbindbar ist, weist für die Zusammenwirkung mit den Bohrungen 37 am Anschlußblock einen Kranz von Bohrungen 39 auf, die konzentrisch zu einer Verbindungsachse 41, welche zur Gehäuselängsachse 3 senkrecht verläuft und durch das Zentrum der die Kammer 33 mit der Hydraulikpumpe verbindenden Öffnung 35 definiert ist, auf dem gleichen Radius wie die Bohrungen 37 des Anschlußblockes 5 angeordnet sind. Somit kann der Anschlußblock 5 um die Verbindungsachse 41 verdreht wer- den, um eine Fluchtung zwischen gewünschten Bohrungen 39 des Bohrungskranzes am Pumpenanschlußstück 7 mit den Bohrungen 37 am Anschlußblock 5 herzustellen, so dass das Dämpfergehäuse 1 mit seiner Längsachse 3 auf gewünschte Drehstellungen, bezogen auf die Verbin- dungsachse 41 , ausgerichtet werden kann. Bei dem Anbau des Dämpferge- häuses 1 an eine betreffende Hydraulikpumpe läßt sich daher die Längserstreckung des Dämpfergehäuses 1 in eine Position drehen, in der bei den jeweiligen Einbaubedingungen eine optimale Raumausnutzung gegeben ist. Mit anderen Worten gesagt, bedeutet dies, dass auch bei schwierigen Ein- bauverhältnissen verhältnismäßig großvolumige Dämpfergehäuse 1 unterbringbar sind.As can be seen from FIG. 2, the connection block 5 has four bores 37 for the engagement of fastening screws, not shown, with which the connection block 5 can be screwed to the pump connection piece 7. 1 and 2, which is designed as an annular body and is in turn connectable to the outlet of the hydraulic pump, has a ring of bores 39 for interaction with the bores 37 on the connecting block, which bores are concentric with a connecting axis 41, which is perpendicular to the longitudinal axis 3 of the housing and is defined by the center of the opening 35 connecting the chamber 33 to the hydraulic pump, is arranged on the same radius as the bores 37 of the connection block 5. Thus, the connection block 5 can be rotated about the connection axis 41 in order to make an alignment between the desired bores 39 of the bore ring on the pump connection piece 7 and the bores 37 on the connection block 5, so that the damper housing 1 with its longitudinal axis 3 relates to the desired rotational positions, based on the connection axis 41 can be aligned. When installing the damper housing 1 to a hydraulic pump in question, the longitudinal extent of the damper housing 1 can therefore be rotated into a position in which an optimal use of space is given in the respective installation conditions. In other words, this means that even with difficult installation conditions, relatively large-volume damper housings 1 can be accommodated.
Während bei den Ausführungsbeispielen von Fig. 1 und 2 die Einstellung der Drehposition des Dämpfergehäuses 1 in Drehschritten erfolgen kann, die der Teilung der Bohrungen 39 am Umfang des als Ringkörper ausgebildeten Pumpenanschlußstückes 7 entsprechen, ermöglicht das Ausführungsbeispiel von Fig. 3 eine stufenlose Einstellung der Drehposition des Dämpfergehäuses 1 um die Verbindungsachse 41. Zu diesem Zweck ist beim zweiten Ausführungsbeispiel das Pumpenanschlußstück 7 nicht als Ring- körper mit umfänglichem Bohrungskranz ausgebildet, sondern in Form eines kreiszylindrischen Hohlkörpers, welcher als Fluid-Zuführrohr dient, das die innere Kammer 3 des Anschlußblockes 5 mit dem in Fig. 3 schematisiert angedeuteten, mit 43 bezeichneten Ausgang der Hydraulikpumpe herstellt. Der zur Verbindungsachse 41 konzentrische Hohlkörper des Pumpenan- schlußstückes 7 weist für die Fluidverbindung mit der inneren Kammer 33 des Anschlußblockes 5 einen Wanddurchbruch 45 auf, der mit der Längsachse 3 des Dämpfergehäuses 1 fluchtet.1 and 2, the setting of the rotational position of the damper housing 1 can take place in rotational steps which correspond to the division of the bores 39 on the circumference of the pump connection piece 7 designed as an annular body, the exemplary embodiment of FIG. 3 enables the rotational position to be adjusted continuously of the damper housing 1 about the connecting axis 41. For this purpose, the pump connection piece 7 in the second exemplary embodiment is not designed as an annular body with a circumferential bore ring, but in the form of a circular cylindrical hollow body which serves as a fluid supply pipe which connects the inner chamber 3 of the connection block 5 with the schematically indicated in Fig. 3, designated 43 of the hydraulic pump. The hollow body of the pump connecting piece 7, which is concentric with the connecting axis 41, has a wall opening 45 for the fluid connection with the inner chamber 33 of the connecting block 5, said wall opening being aligned with the longitudinal axis 3 of the damper housing 1.
An dem aus dem Anschlußblock 5 vorstehenden offenen Ende, welches für den Fluideintritt am Pumpenausgang 43 anzubringen ist, weist das Pumpenanschlußstück 7 einen Endflansch 47 auf. Mittels halbringartiger Flanschspannbacken 49, wie sie für Anschlußverbindungen nach dem SAE- Standard 0 518) üblich sind, läßt sich das Pumpenanschlußstück 7 am Pumpenausgang 43 festlegen. Durch Verdrehen des kreisrunden Endflan- sches 47 des Pumpenanschlußstückes 7 innerhalb der den Endflansch 47 ringförmig umgebenden Spannbacken 49 läßt sich die Drehstellung um die Verbindungsachse 41 stufenlos nach Wunsch wählen.At the open end protruding from the connection block 5, which is to be attached for the fluid inlet at the pump outlet 43, the pump connection piece 7 has an end flange 47. The pump connection piece 7 can be fixed at the pump outlet 43 by means of half-ring-like flange clamping jaws 49, as are customary for connection connections according to the SAE standard 0 518). By turning the circular end flange cal 47 of the pump connector 7 within the clamping jaws 49 surrounding the end flange 47 in an annular manner, the rotational position about the connecting axis 41 can be selected continuously as desired.
Es versteht sich, dass anstelle des bei beiden Ausführungsbeispielen gezeigten Dämpfergehäuses 1 eines Reflexionsdämpfers gleichermaßen Dämpfersysteme anderer Funktionsweise am Anschlußblock 5 angebracht sein könnten, beispielsweise Hydrodämpfer, die auf dem Prinzip hydro- pneumatischer Blasen- und Membranspeicher basieren.It goes without saying that instead of the damper housing 1 of a reflection damper shown in the two exemplary embodiments, damper systems of another function could equally be attached to the connection block 5, for example hydraulic dampers, which are based on the principle of hydropneumatic bladder and diaphragm accumulators.
Der erfindungsgemäße Hydrodämpfer kann in der Art einer Erstausrüstung für einen bestimmten Maschinentyp einer Kunststoffspritzgießmaschine ausgeliefert werden. In Abhängigkeit der Platzverhältnisse an der jeweiligen Maschine werden dann über das vorhandene Bohrbild bevorzugte Bohrun- gen an dem Pumpenanschlußstück vorgesehen, und bei Folgelieferungen kann dann auf ein kompliziertes Bohrbild am Pumpenanschlußstück verzichtet werden; vielmehr ist es dann möglich ein bestimmtes Bohrbild zu wählen, bei dem der vorgegebene Hydrodämpfer eine gewünschte Lage zu dem für ihn vorgesehenen Maschinentyp an einer Kunststoffspritzgießma- schine einnimmt. The hydraulic damper according to the invention can be delivered in the form of original equipment for a specific machine type of a plastic injection molding machine. Depending on the space available on the respective machine, preferred holes are then provided on the pump connection piece via the existing drilling pattern, and a complicated drilling pattern on the pump connection piece can then be dispensed with in the case of subsequent deliveries; on the contrary, it is then possible to select a specific drilling pattern in which the predefined hydraulic damper assumes a desired position on a plastic injection molding machine in relation to the type of machine intended for it.

Claims

P a t e n t a n s p r ü c h e Patent claims
1 . Hydrodämpfer zur Abschwächung von Druck- und/oder Schal Ischwin- gungen bei Systemen, zu deren Betrieb Druckfluide einsetzbar sind, der aufweist:1 . Hydraulic damper for the weakening of pressure and / or formwork vibrations in systems for the operation of which pressure fluids can be used, which comprises:
• ein Dämpfergehäuse (1) mit einer eine Gehäuselängsachse (3) definierenden Hauptabmessung;• a damper housing (1) with a main dimension defining a housing longitudinal axis (3);
• einen Anschlußblock (5) für die Fluidverbindung des Dämpfergehäu- ses (1 ) mit dem betreffenden System und• a connection block (5) for the fluid connection of the damper housing (1) with the relevant system and
• eine dem Anschlußblock (5) zugeordnete Verbindungseinrichtung (7) zum Anbringen des Anschlußblockes (5) und damit des Dämpfergehäuses (1) an dem System in wählbaren Drehstellungen, bezogen auf eine Verbindungsachse (41 ), die quer zur Gehäuselängsach- se (3) verläuft.• A connection device (7) assigned to the connection block (5) for attaching the connection block (5) and thus the damper housing (1) to the system in selectable rotational positions, based on a connection axis (41) which is transverse to the housing longitudinal axis (3) runs.
2. Hydrodämpfer nach Anspruch 1 , dadurch gekennzeichnet, dass die Verbindungsachse (41) zur Gehäuselängsachse (3) zumindest näherungsweise rechtwinklig verläuft.2. Hydraulic damper according to claim 1, characterized in that the connecting axis (41) to the housing longitudinal axis (3) is at least approximately at right angles.
3. Hydrodämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Verbindungseinrichtung ein die Fluidverbindung zwischen dem Anschlußblock (5) und einer Hydraulikpumpe bildendes Pumpenanschlußstück (7) aufweist, das am Ausgang (43) der Hydraulikpumpe in wählba- ren, auf die Verbindungsachse (41 ) bezogenen Drehstellungen festlegbar ist.3. Hydraulic damper according to claim 1 or 2, characterized in that the connecting device has a fluid connection between the connection block (5) and a hydraulic pump forming pump connector (7), which is selectable at the outlet (43) of the hydraulic pump, on the connecting axis (41) related rotational positions can be determined.
4. Hydrodämpfer nach Anspruch 3, dadurch gekennzeichnet, dass das Pumpenanschlußstück (7) einen am Ausgang (43) der Pumpe befestigba- ren Ringkörper mit einem entlang seines Umfanges angeordneten Kranz von Bohrungen (39) aufweist, von denen solche, die gewünschten Drehstellungen des Anschlußblockes (5), bezogen auf die Verbindungsachse (41), entsprechen, für den Eingriff von Befestigungsschrauben auswählbar sind, die am Anschlußblock (5) vorgesehen sind.4. Hydraulic damper according to claim 3, characterized in that the pump connection piece (7) at the outlet (43) of the pump fastened. Ren ring body with a ring of holes (39) arranged along its circumference, of which those which correspond to the desired rotational positions of the connection block (5), based on the connection axis (41), can be selected for the engagement of fastening screws on the connection block (5) are provided.
5. Hydrodämpfer nach Anspruch 3, dadurch gekennzeichnet, dass das Pumpenanschlußstück (7) zur Anbringung an einem Ausgang (43) der Pumpe vorgesehen ist, der Anschlußteile zur Bildung einer SAE-Norm Flanschverbindung aufweist, und dass das Pumpenanschlußstück (7) einen kreisrunden Endflansch (47) aufweist, der in gewählter Drehstellung, bezogen auf die Verbindungsachse (41), mittels halbringartiger SAE-Flanschspannbacken (49) festlegbar ist, die mit den SAE- Anschlußteilen des Ausgangs (43) der Pumpe verschraubbar sind.5. Hydraulic damper according to claim 3, characterized in that the pump connection piece (7) is provided for attachment to an outlet (43) of the pump, which has connecting parts for forming a SAE standard flange connection, and that the pump connection piece (7) has a circular end flange (47), which can be fixed in the selected rotational position, based on the connecting axis (41), by means of semi-ring-like SAE flange clamping jaws (49) which can be screwed to the SAE connecting parts of the outlet (43) of the pump.
6. Hydrodämpfer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der.Anschlußblock (5) eine innere Kammer (33) mit einer sich zur Gehäuselängsachse (3) konzentrisch erstreckenden Ausströmöffnung, welche mit dem Eingang (1 1 ) des Dämpfergehäuses (1 ) ver- bunden ist, besitzt, und dass als Pumpenanschlußstück (7) ein sich konzentrisch zur Verbindungsachse (41 ) und senkrecht zur Gehäuselängsachse (3) in die Kammer (33) des Anschlußblockes (5) erstreckender kreiszylindrischer Hohlkörper vorgesehen ist, der als Fluid-Zuführrohr dient und einen zur Gehäuselängsachse (3) konzentrischen Wand- durchbruch (45) für die Fluidverbindung mit der inneren Kammer (33) des Anschlußblockes (5) aufweist.6. Hydraulic damper according to one of claims 1 to 5, characterized in that the connection block (5) has an inner chamber (33) with an outflow opening which extends concentrically to the housing longitudinal axis (3) and which communicates with the inlet (11) of the damper housing ( 1) is connected, and that a circular cylindrical hollow body is provided as the pump connecting piece (7) concentrically to the connecting axis (41) and perpendicular to the longitudinal axis (3) of the chamber (33) of the connection block (5) The fluid supply pipe is used and has a wall opening (45) which is concentric with the longitudinal axis of the housing (3) for the fluid connection to the inner chamber (33) of the connection block (5).
7. Hydrodämpfer nach Anspruch 6, dadurch gekennzeichnet, dass das Dämpfergehäuse (1 ) einen Flüssigkeitsschalldämpfer (9) vom Refle- xionstyp enthält, der von dem zu dämpfenden Druckfluid durchströmbar ist.7. Hydraulic damper according to claim 6, characterized in that the damper housing (1) has a liquid silencer (9) from the reflector. Contains xion type, through which the pressure fluid to be damped can flow.
8. Hydrodämpfer nach Anspruch 7, dadurch gegenzeichnet, dass die inne- re Kammer (33) des Anschlußblockes (5), die mit dem Eingang (1 1) des8. Hydraulic damper according to claim 7, characterized in that the inner chamber (33) of the connection block (5) which with the input (1 1) of
Flüssigkeitsschalldämpfers (9) verbunden ist, als Vorkammer des Flüssigkeitsschalldämpfers (9) vorgesehen ist. Liquid muffler (9) is connected, is provided as a prechamber of the liquid muffler (9).
PCT/EP2003/003460 2002-04-17 2003-04-03 Hydro damper WO2003087584A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/511,583 US20050129549A1 (en) 2002-04-17 2003-04-03 Hydro damper
DE50303482T DE50303482D1 (en) 2002-04-17 2003-04-03 HYDRO SHOCKS
JP2003584504A JP4125680B2 (en) 2002-04-17 2003-04-03 Hydraulic damper
EP03714916A EP1495231B1 (en) 2002-04-17 2003-04-03 Hydro damper

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DE10217081.9 2002-04-17
DE10217081A DE10217081A1 (en) 2002-04-17 2002-04-17 hydraulic dampers

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JP (1) JP4125680B2 (en)
AT (1) ATE327439T1 (en)
DE (2) DE10217081A1 (en)
WO (1) WO2003087584A1 (en)

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DE102016203821A1 (en) * 2016-03-09 2017-09-14 Robert Bosch Gmbh liquid silencer

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US20050129549A1 (en) 2005-06-16
DE50303482D1 (en) 2006-06-29
EP1495231B1 (en) 2006-05-24
DE10217081A1 (en) 2003-11-13
JP2005522640A (en) 2005-07-28
EP1495231A1 (en) 2005-01-12
JP4125680B2 (en) 2008-07-30
ATE327439T1 (en) 2006-06-15

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