DE19632746A1 - Pressure accumulator - Google Patents

Pressure accumulator

Info

Publication number
DE19632746A1
DE19632746A1 DE1996132746 DE19632746A DE19632746A1 DE 19632746 A1 DE19632746 A1 DE 19632746A1 DE 1996132746 DE1996132746 DE 1996132746 DE 19632746 A DE19632746 A DE 19632746A DE 19632746 A1 DE19632746 A1 DE 19632746A1
Authority
DE
Germany
Prior art keywords
oil
accumulator
pressure
pressure accumulator
pulsation
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.)
Withdrawn
Application number
DE1996132746
Other languages
German (de)
Inventor
Wilfried Leutner
Heino Kemter
Gerhard Dr Ruck
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Priority to DE1996132746 priority Critical patent/DE19632746A1/en
Priority to PCT/EP1997/004322 priority patent/WO1998006948A1/en
Publication of DE19632746A1 publication Critical patent/DE19632746A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3152—Accumulator separating means having flexible separating means the flexible separating means being bladders
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/413—Liquid ports having multiple liquid ports
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/43—Anti-extrusion means
    • F15B2201/435—Anti-extrusion means being fixed to the separating means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Pipe Accessories (AREA)

Abstract

The invention relates to an accumulator (1) for supplying oil to servo devices. In hydraulic facilities operating with an accumulator (1), the pump often causes disturbing noise resulting from oil pressure pulsation. In order to reduce said pulsation, the inventive accumulator has two connecting openings, one for oil intake and the other for oil discharge. Upon oil inflow there occurs a substantial cross-sectional change resulting in damped pulsation. Besides, the accumulator (1) acts as an extensible hose, so that the damping effect is increased.

Description

Die Erfindung betrifft einen Druckspeicher für die Ölversorgung, insbesondere in Kraftfahrzeugen.The invention relates to a pressure accumulator for the Oil supply, especially in motor vehicles.

In Hydraulikanlagen setzt man seit vielen Jahren Druckspeicher ein, die man über Rohrleitungen und Hoch­ druckschläuche an die zugehörigen Bauteile einer Energie­ versorgung anschließt. Eine derartige Energieversorgung ist z. B. in einem Aufsatz der Zeitschrift o + p "ölhydraulik und pneumatik" 30 (1986), Nr. 12, durch die Autoren Dr. E. Naumann und F. Bogner, Ingolstadt, in dem Aufsatz "Die Hochdruckhydraulik in Audi 100 und Audi 200" beschrie­ ben worden. In diesen Fahrzeugen verwendet man zur Energie­ versorgung von Bremse, Servolenkung und Niveauregulierung eine Konstantdruckquelle. Eine Speicherladevorrichtung hält dabei den Druck im Speicher zwischen einem oberen und einem unteren Grenzwert konstant. Fällt der Druck unter ein be­ stimmtes Niveau, so lädt eine Pumpe den Druckspeicher nach. Um den Druckspeicher klein zu halten, betreibt man diesen in der Regel mit einem höheren Druck. Der Druckspeicher besitzt einen einzigen Anschluß, durch den das Öl in den Speicher und aus dem Speicher herausfließt. Ein Nachteil einer derartigen Hydraulikanlage besteht jedoch immer noch darin, daß die Druckpulsation, besonders einer Radialkol­ benpumpe, Geräusche verursacht, die im Fahrzeug störend ist. Die zyklisch geförderten Volumina verursachen sowohl auf der Saugseite als auch auf der Druckseite Druckschwan­ kungen, Druckschwingungen und Pulsationen. Die Druckschwin­ gungen werden von Einlaß- und Auslaßstößen überlagert, die beim Öffnen und Schließen der Förderkammern, insbesondere durch Einlaß- und Auslaßventile, entstehen. Wenn der Druck im System hoch ist oder die Arbeitskammern nur teilweise gefüllt werden, treten in der Regel besonders hohe Druck­ schwankungen auf.Hydraulic systems have been used for many years Pressure accumulator, which one over pipes and high pressure hoses to the associated components of an energy supply connects. Such an energy supply is e.g. B. in an article of the magazine o + p "oil hydraulics und pneumatik "30 (1986), No. 12, by the authors Dr. E. Naumann and F. Bogner, Ingolstadt, in the essay "The high-pressure hydraulics in Audi 100 and Audi 200" described been used. These vehicles use energy supply of brake, power steering and level control a constant pressure source. A storage loader holds thereby the pressure in the memory between an upper and an lower limit constant. If the pressure falls under a be level, a pump recharges the pressure accumulator. In order to keep the pressure accumulator small, it is operated usually with a higher pressure. The accumulator has a single connection through which the oil in the Memory and flows out of the memory. A disadvantage such a hydraulic system still exists in that the pressure pulsation, especially a radial piston benpump, causing noise in the vehicle is. The cyclically pumped volumes cause both on the suction side as well as on the pressure side pressure swan pressure fluctuations and pulsations. The pressure swin are superimposed by inlet and outlet surges that when opening and closing the delivery chambers, in particular through intake and exhaust valves. If the pressure  is high in the system or the working chambers are only partially are usually filled with particularly high pressure fluctuations.

Der Erfindung liegt daher die Aufgabe zugrunde, eine deutlich spürbare Verringerung der Druckpulsationen und damit des Geräusches zu erreichen.The invention is therefore based on the object clearly noticeable reduction in pressure pulsations and thereby achieving the noise.

Diese Aufgabe ist durch die im Anspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen enthalten die Unteransprüche 2 bis 4.This object is by the specified in claim 1 Features resolved. Advantageous configurations contain the Subclaims 2 to 4.

Nach dem Hauptmerkmal hat der Druckspeicher je einen Anschluß für zu- und abströmendes Öl. Durch den einen An­ schluß strömt somit das Öl in den Druckspeicher und durch den anderen Anschluß strömt das Öl wieder aus dem Druck­ speicher heraus. Dadurch ergibt sich beim Einströmen ein starker Querschnittssprung, der sich auf die Pulsations­ dämpfung vorteilhaft auswirkt. Hinzu kommt die Wirkung des Druckspeichers als "Dehnschlauch", wodurch die Pulsation weiter sinkt. Beide Effekte zusammen wirken in hohem Maße pulsations- und damit geräuschdämpfend. Die Erfindung ist auf alle Arten von Druckspeichern, z. B. Membranspeicher, Blasenspeicher, Kolbenspeicher mit Gas- oder Federvorspan­ nung, anwendbar.According to the main feature, the accumulator has one Connection for incoming and outgoing oil. By the one finally the oil flows into the pressure accumulator and through the oil flows out of the pressure through the other connection save out. This results in an inflow strong cross-sectional jump that affects the pulsations damping has an advantageous effect. Added to this is the effect of Pressure accumulator as an "expansion hose", causing the pulsation continues to decrease. Both effects work together to a high degree pulsation and thus noise dampening. The invention is on all types of pressure accumulators, e.g. B. membrane accumulator, Bladder accumulator, piston accumulator with gas or spring preload application.

Nach Anspruch 2 ist es vorteilhaft, zur einfachen Mon­ tage beide Anschlüsse in einem Anschlußstück unterzubrin­ gen. According to claim 2, it is advantageous for simple mon days to accommodate both connections in one connector gene.  

Nach Anspruch 3 führt man die beiden Anschlüsse zweck­ mäßig getrennt bis zu einem Raum unmittelbar vor der Durch­ gangsbohrung zu einem Ölraum des Druckspeichers. So benö­ tigt man nur eine Durchgangsbohrung zum Ölraum des Druck­ speichers, mit den Vorteilen der getrennten Anschlüsse für zu- und abströmendes Öl.According to claim 3, the two connections are used moderately separated up to a room immediately before the through passage hole to an oil chamber of the pressure accumulator. So needed you only need one through hole to the oil space of the pressure memory, with the advantages of separate connections for oil flowing in and out.

Nach Anspruch 4 ist es günstig, den Raum vor der Durchgangsbohrung zu dem Ölraum des Druckspeichers durch einen Steg zu trennen. Die Anschlüsse sind daher bis unmit­ telbar zur Durchgangsbohrung des Ölraumes separat geführt. Durch diese getrennte Führung des in den Ölraum des Druck­ speichers ein- und aus strömenden Öls läßt sich eine Über­ tragung von Pulsation, Druckschwingungen und Druckschwan­ kungen vom zu- zum abströmenden Öl vermeiden. Insgesamt lassen sich daher durch die Effekte der Erfindung Druck­ pulsation, Druckschwingungen und Druckschwankungen des ab­ strömenden Öls wesentlich geringer halten als die des zu­ strömenden Öls.According to claim 4, it is convenient to the room in front of the Through hole to the oil space of the pressure accumulator to separate a web. The connections are therefore unmit led separately to the through hole of the oil chamber. Through this separate guidance of the pressure in the oil space Storage in and out of flowing oil can be an over carrying pulsation, pressure vibrations and pressure swan Avoid cuts from the incoming and outgoing oil. All in all can therefore be printed by the effects of the invention pulsation, pressure fluctuations and pressure fluctuations of the keep the oil flowing much lower than that of the pouring oil.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläu­ tert. Die Zeichnung zeigt einen Schnitt durch einen Gas­ speicher.The invention is based on one in the Drawing illustrated embodiment explained in more detail tert. The drawing shows a section through a gas Storage.

Ein Druckspeicher 1 besteht aus einem Ölraum 2 und einer Membran 3, die den Ölraum 2 in einen Gasraum 4 unter­ teilt. Ein Anschlußstück 5 weist nach der Erfindung zwei Anschlußbohrungen 6 und 7 auf. Die Anschlußbohrungen 6 und 7 münden in Kammern 8 und 9, die durch einen Steg 10 voneinander getrennt sind. Der Steg 10 unterteilt eine Durchgangsbohrung 11 zum Ölraum 2 in zwei Strömungswege auf. Das zuströmende Öl wird dadurch zwangsweise in den Ölraum 2 des Druckspeichers 1 geführt und verliert auf sei­ nem Weg, vorbei an dem Steg 10 und im Druckspeicher 1 selbst, seine Pulsation.A pressure accumulator 1 consists of an oil chamber 2 and a membrane 3 , which divides the oil chamber 2 into a gas chamber 4 . A connector 5 has two connecting holes 6 and 7 according to the invention. The connection bores 6 and 7 open into chambers 8 and 9 , which are separated from one another by a web 10 . The web 10 divides a through hole 11 to the oil space 2 into two flow paths. The inflowing oil is thus forced into the oil chamber 2 of the pressure accumulator 1 and loses its pulsation on its way past the web 10 and in the pressure accumulator 1 itself.

BezugszeichenlisteReference list

1 Druckspeicher
2 Ölraum
3 Membran
4 Gasraum
5 Anschlußstück
6 Anschlußbohrung
7 Anschlußbohrung
8 Kammer
9 Kammer
10 Steg
11 Durchgangsbohrung 1 accumulator
2 oil room
3 membrane
4 gas space
5 connector
6 connection hole
7 connection hole
8 chamber
9 chamber
10 bridge
11 through hole

Claims (4)

1. Druckspeicher für die Ölversorgung von Servoein­ richtungen, insbesondere in Kraftfahrzeugen, dadurch gekennzeichnet, daß der Druckspeicher (1) je eine Anschlußbohrung (6, 7) für das zu- und das abströ­ mende Öl aufweist.1. Pressure accumulator for the oil supply of servo devices, in particular in motor vehicles, characterized in that the pressure accumulator ( 1 ) each has a connection bore ( 6 , 7 ) for the incoming and outgoing oil. 2. Druckspeicher nach Anspruch 1, dadurch ge­ kennzeichnet, daß beide Anschlußbohrungen (6, 7) in einem Anschlußstück (5) untergebracht sind.2. Pressure accumulator according to claim 1, characterized in that both connection bores ( 6 , 7 ) are accommodated in a connection piece ( 5 ). 3. Druckspeicher nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die beiden Anschlußboh­ rungen (6, 7) bis zu einem Raum (8, 9) unmittelbar vor der Durchgangsbohrung (11) zu einem Ölraum (2) des Druckspei­ chers (1) getrennt geführt sind.3. Pressure accumulator according to claims 1 and 2, characterized in that the two connecting bores ( 6 , 7 ) up to a space ( 8 , 9 ) immediately before the through hole ( 11 ) to an oil space ( 2 ) of the Druckspei chers ( 1st ) are managed separately. 4. Druckspeicher nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß der Raum (8, 9) vor der Durchgangsbohrung (11) zum Ölraum (2) des Druckspei­ chers (1) durch einen Steg (10) getrennt ist, so daß die Anschlußbohrungen (6, 7) bis unmittelbar an die Durchgangs­ bohrung (11) zum Ölraum (2) getrennt sind.4. Pressure accumulator according to claims 1 to 3, characterized in that the space ( 8 , 9 ) before the through hole ( 11 ) to the oil space ( 2 ) of the Druckspei chers ( 1 ) is separated by a web ( 10 ) so that the Connection bores ( 6 , 7 ) until the through hole ( 11 ) to the oil space ( 2 ) are separated.
DE1996132746 1996-08-14 1996-08-14 Pressure accumulator Withdrawn DE19632746A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1996132746 DE19632746A1 (en) 1996-08-14 1996-08-14 Pressure accumulator
PCT/EP1997/004322 WO1998006948A1 (en) 1996-08-14 1997-08-08 Accumulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996132746 DE19632746A1 (en) 1996-08-14 1996-08-14 Pressure accumulator

Publications (1)

Publication Number Publication Date
DE19632746A1 true DE19632746A1 (en) 1998-02-19

Family

ID=7802602

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996132746 Withdrawn DE19632746A1 (en) 1996-08-14 1996-08-14 Pressure accumulator

Country Status (2)

Country Link
DE (1) DE19632746A1 (en)
WO (1) WO1998006948A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1186804A (en) * 1967-09-25 1970-04-08 Bendix Corp Hydraulic Accumulator Inlet/Outlet Fitting

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483889A (en) * 1967-06-29 1969-12-16 Bowles Eng Corp Fluidic capacitors
DE2127718A1 (en) * 1971-06-04 1972-12-14 Langen & Co Hydraulic accumulator
US5219000A (en) * 1992-05-29 1993-06-15 General Motors Corporation Fluid pressure accumulator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1186804A (en) * 1967-09-25 1970-04-08 Bendix Corp Hydraulic Accumulator Inlet/Outlet Fitting

Also Published As

Publication number Publication date
WO1998006948A1 (en) 1998-02-19

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