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WO2010127660A2 - Accumulateur de pression hydraulique - Google Patents

Accumulateur de pression hydraulique Download PDF

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Publication number
WO2010127660A2
WO2010127660A2 PCT/DE2010/000474 DE2010000474W WO2010127660A2 WO 2010127660 A2 WO2010127660 A2 WO 2010127660A2 DE 2010000474 W DE2010000474 W DE 2010000474W WO 2010127660 A2 WO2010127660 A2 WO 2010127660A2
Authority
WO
WIPO (PCT)
Prior art keywords
pressure accumulator
hydraulic
accumulator
hydraulic pressure
spring
Prior art date
Application number
PCT/DE2010/000474
Other languages
German (de)
English (en)
Other versions
WO2010127660A3 (fr
Inventor
Martin Staudinger
Eric MÜLLER
Ronald Glas
Original Assignee
Schaeffler Technologies Gmbh & Co. Kg
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 Schaeffler Technologies Gmbh & Co. Kg filed Critical Schaeffler Technologies Gmbh & Co. Kg
Priority to DE112010001915T priority Critical patent/DE112010001915A5/de
Priority to CN201080017231.3A priority patent/CN102405352B/zh
Publication of WO2010127660A2 publication Critical patent/WO2010127660A2/fr
Publication of WO2010127660A3 publication Critical patent/WO2010127660A3/fr

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
    • 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
    • F15B2201/305—Accumulator separating means without separating means
    • 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
    • F15B2201/50—Monitoring, detection and testing means for accumulators

Definitions

  • the present invention relates to a pressure accumulator for a hydraulic system having at least one pressure chamber, which is formed between two opposing sliding boundary surfaces, each comprising a spring cover and a plate spring, and at least one fixed boundary surface.
  • the pressure chamber is in fluid communication with a hydraulic circuit.
  • Accumulators are used in many hydraulic systems, for example in automatic or automated transmissions, for driving and operating clutches, for actuating a piston / cylinder unit which generate an actuating force in hydraulic anti-lock braking systems (ABS) or hydraulic camshaft adjusters.
  • ABS hydraulic anti-lock braking systems
  • an automatically actuated clutch can be actuated by means of a hydraulic actuator, or such a hydraulic circuit can also be used to adjust the transmission ratio between the two conical pulley pairs of a conical pulley belt transmission or to control an automatic transmission. If such an actuating force has to be built up very quickly, the startup process of an electric motor of an electromotive hydraulic pump can already lead to the time duration required for the starting operation of the electric motor being too great. It is therefore necessary to keep a certain volume of pressurized fluid under a predetermined pressure in reserve, so that with this pressurized fluid, the required operating force can be built up in the required period of time.
  • the aforementioned applications of hydraulic controls almost always require an additional electronic control, which cooperates with the hydraulic control. This electronic control is usually summarized in a control unit and occurs by means of electrical control and signal lines in operative connection with the hydraulic control.
  • hydraulic pressure accumulators in the form of, for example, a diaphragm accumulator can now be used.
  • this has the disadvantage that on the one hand, the membrane is not completely pressure-tight and on the other hand is subject to fatigue, so that the time required by the pressure accumulator life with the diaphragm accumulator can not be met.
  • AIs further possibility of such a pressure accumulator is the piston accumulator with a coil spring or gas pressure base available with which the desired amount of pressurized fluid can be kept at the predetermined pressure level.
  • Such a piston accumulator has an axially movable in a cylinder pressure piston, with which the pressure fluid can be maintained at the desired pressure level.
  • Disc spring accumulator further have the advantage that they have a relatively flat characteristic.
  • a generic hydraulic accumulator is known from WO 2007/000128. There, a spring accumulator is proposed, are clamped in the two disc springs between two housing covers, which are bolted to control plates.
  • German Laid-Open Patent DE 10 2008 015 830 A1 discloses a hydraulic pressure accumulator having at least one pressure chamber which is formed between two oppositely displaceable boundary surfaces, each comprising a spring cover and a disc spring, and at least one fixed boundary surface, the fixed boundary surface being at least one Part of its circumference is a rotational body of a U-shaped cross-section as a generating curve that defines the disc springs in the axial direction.
  • Object of the present invention is to provide an improved hydraulic diaphragm spring pressure accumulator of the type mentioned above.
  • a hydraulic pressure accumulator for a pressurized fluid-containing hydraulic system, with at least one pressure chamber, the two opposite slidable boundary surfaces, each comprising a spring cover and a disc spring, and at least one fixed boundary surface is formed, wherein both the disc spring and the spring cover are each assigned a sealing ring and a tilting ring, solved by an electronic control is disposed within the pressure accumulator.
  • the hydraulic system is partially or completely controllable and / or controllable by means of the integrated into the pressure accumulator for the hydraulic system electronic control.
  • the electronic control is integrated in the diaphragm spring pressure accumulator.
  • a separate housing for the control is no longer required.
  • the control is arranged in the space available anyway, an enlargement of the disc spring accumulator is generally not or only minimally required.
  • sensors in particular electrical or electronic sensors.
  • sensors can be used for detecting and relaying the fill level of the pressure accumulator by detecting the distance between two parts of the pressure accumulator, in particular the cup spring cover or the temperature of the pressure fluid.
  • control and signal and supply lines can be brought together at a single point, so that a central connection is provided.
  • control and signal and supply lines can be brought together at a single point, so that a central connection is provided.
  • a support member is arranged between the disc springs and the disc spring, which serves as an abutment for the disc springs associated, so the radially inner sealing and Kippringen.
  • This carrier component is preferably made of plastic.
  • the carrier Component be provided in its central region with openings, so that at low internal memory pressure, the spring cover without the support member to load each other rest.
  • the support member may be provided according to an embodiment of the invention with a sensor and / or the electronic control.
  • the electronic components may be embedded in the carrier component, so that they are sealed against the pressurized fluid.
  • Electronic components may alternatively or additionally also be arranged on the carrier component. In general, care must also be taken in this case for a fluid-tight cover, for example by means of a corresponding film or by means of a potting compound.
  • the integration of the electronic components with the carrier component can be realized in a particularly cost-effective and simple manner if this is produced in an injection molding method. It is also possible to inject only individual parts of the electronic control during the injection molding directly into the carrier component, for example conductor tracks or fastening elements.
  • the central connection is produced integrally with the carrier component.
  • the carrier component is then a finished part, which in addition to the electronic control and optionally sensor elements and the preferred single connection of the electronic components to the environment, namely a central terminal, preferably in the form of a plug, clamp or screw connection contains, as an integrated part.
  • Carrier component and central connection are thus in one piece during installation.
  • the electronic control can also be arranged outside the pressure chamber for the fluid, namely, or partially above the upper plate spring and below the lower plate spring.
  • a separate seal against the pressurized fluid as in or on the support member is not required in this case, since said spaces are sealed per se against the pressurized fluid.
  • the embodiments of the invention in which the electronic control is arranged in or on the carrier component, have the additional advantage that the electronic components can be cooled by means of the pressurized fluid. Depending on the performance of the components, a significant amount of heat can arise, which can then be easily removed by means of the already existing fluid. A separate additional cooling unit Direction for the Sterelektronik is then usually not required.
  • Another advantage of the hydraulic pressure accumulator according to the invention is that the often critical sealing of the electronic control in the hydraulic system is eliminated from environmental influences, since the pressure accumulator already has an effective seal. This is the case in particular when the controller is embedded in the carrier component.
  • FIG. 1 shows a sectional view through a pressure accumulator according to the invention.
  • Fig. 2 is a sectional view of the pressure accumulator according to Figure 1 in the filled state
  • FIG. 3 is a perspective, cutaway plan view of the pressure accumulator according to FIG. 1.
  • FIGS. 1 to 3 show an embodiment of a pressure accumulator 1 according to the invention, wherein the representations of FIGS. 1 and 2 differ only in that the pressure accumulator 1 in Fig.1 is depressurized and in Fig. 2 is under pressure.
  • Fig. 3 is a perspective plan view of the pressure accumulator according to Fig.1. For clarity, a part of the accumulator is broken away.
  • the pressure accumulator 1 two annular disc springs, namely a lower plate spring 2 and an upper plate spring 3, the central opening is closed by means of a spring cover 4, 5.
  • the upper plate spring 3 acts together with an upper spring cover 5, according acts a lower plate spring 2 with a lower spring cover 4 together.
  • the upper spring cover 5 and the lower spring cover 4 are identical, accordingly, the upper plate spring 3 and the lower plate spring 2 are identical.
  • the disc springs 2, 3 are fixed at their outer periphery by a three-part housing ring 6 with a U-shaped cross-section.
  • a support member 7 is disposed of injection-molded plastic.
  • a sensor coil 8 and 9 boards and electronic chips 10 are integrated fluid-tight.
  • the sensor coil 8 is part of a not fully shown sensor for detecting the distance between the support member 7 and the disc springs 2, 3. This distance is a measure of the degree of filling of the pressure accumulator and thus can be a measure for the stored pressure.
  • the boards 9 and the chips 10 can cooperate, but at least partially form an electronic control or regulation for a hydraulic system or for a hydraulic system containing overall technical system, such as a transmission control. Therefore, this control or regulation does not require a separate housing, but is integrated into the support member and thus in the pressure accumulator and sealed fluid-tight.
  • the electronic components 9, 10 form a complete control for a part or for an entire hydraulic system, in particular a complete transmission and / or clutch control for an automatic or automated transmission.
  • the support member 7 further has recesses, protrude through the support cams 11, 12 of the spring cover 4, 5.
  • the support cams 11, 12 are in the depressurized state of the pressure accumulator as shown in Fig. 1 on each other and lift in the filled with pressurized fluid state of the accumulator, which is shown in Fig. 2, from each other. In this way, an inadmissibly high surface pressure applied by the disc springs 2, 3 to the carrier component 7 made of plastic can be avoided. In addition, this avoids that in the case of deviating inside the spring forces bending of the support member is caused.
  • the pressure chamber 13 can be filled by means of a pressure fluid inlet 14, which is connectable to a hydraulic system via a valve, not shown.
  • the pressure fluid inlet 14 is passed through an opening in the housing ring 6 and opens into the support member 7, wherein this connection is sealed by means of a seal 15.
  • the carrier component 7 furthermore has a recess 16, through which the pressure fluid can flow from the pressure fluid inlet 14 into the pressure chamber 13.
  • the upper spring cover 5 comprises in its radially outer region two adjacent annular grooves.
  • the inner annular groove receives a cover-side tilting ring 17, the outer receives a cover-side sealing ring 18.
  • the upper plate spring 3 is mounted on the housing side on a housing-side tilting ring 19 and sealed against the environment via a housing-side sealing ring 20.
  • the upper spring cover 5 is identical to the lower spring cover 4, as are the upper plate spring 3 and lower plate spring 2 are identical, these lower components have a corresponding rocker rings and sealing rings. If hydraulic pressure is built up in the pressure chamber 13 by means of the pressure fluid, then the spring covers 4 and 5 as well as the radially inner regions of the disk springs 2 and 3 are pressed outwards, so that the pressure chamber 13 increases. Fig.
  • the support member 7 is used in the illustrated embodiment of the accumulator 1 according to the invention thus as a sensor, seal and electronics carrier.
  • the carrier component 7 furthermore assumes the function of an abutment for the radially outer, ie housing-side, sealing rings 20.
  • the electronic components 9, 10 are additionally cooled by means of the pressurized fluid surrounding them. In this way, an often not inconsiderable amount of heat generated by electronic components can be dissipated, without requiring expensive measures to be taken, such as the arrangement of cooling fins or the installation of fans.
  • the electrical supply, supply and signal lines, not shown, are bundled in the pressure accumulator 1 in a simplified drawn central, guided through an opening in the housing 6 to the outside plug-in connection 21, which is connectable to a plug.
  • the supply, supply and signal lines for and to the electrical and electronic components are thus brought together at a point of the support member and also the hydraulic system, so that they can be contacted by means of a central plug, not shown.
  • the central plug connection 21 is an integral part of the carrier component 7.
  • FIG. 3 shows the pressure accumulator 1 in a perspective plan view, wherein a portion of the pressure spoke 1 is cut out to make perceptible the components specified above.

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)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un accumulateur de pression hydraulique (1) destiné à un système hydraulique contenant un fluide sous pression, comprenant au moins une chambre de pression (13) formée entre deux surfaces de délimitation mobiles, opposées, comprenant chacune un couvercle de ressort (4, 5) et un ressort diaphragme (2, 3), et au moins une surface de délimitation fixe, une bague d'étanchéité (18, 20) et une bague basculante (17, 19) étant respectivement associées aussi bien au ressort diaphragme (2, 3) qu'au couvercle de ressort (4, 5). Une unité de commande électronique (9, 10) est placée à l'intérieur de l'accumulateur de pression (1).
PCT/DE2010/000474 2009-05-05 2010-04-26 Accumulateur de pression hydraulique WO2010127660A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112010001915T DE112010001915A5 (de) 2009-05-05 2010-04-26 Hydraulischer Druckspeicher
CN201080017231.3A CN102405352B (zh) 2009-05-05 2010-04-26 液压的压力储存器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009020019.3 2009-05-05
DE102009020019 2009-05-05

Publications (2)

Publication Number Publication Date
WO2010127660A2 true WO2010127660A2 (fr) 2010-11-11
WO2010127660A3 WO2010127660A3 (fr) 2011-09-15

Family

ID=42279841

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000474 WO2010127660A2 (fr) 2009-05-05 2010-04-26 Accumulateur de pression hydraulique

Country Status (3)

Country Link
CN (1) CN102405352B (fr)
DE (2) DE102010018195A1 (fr)
WO (1) WO2010127660A2 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224136A1 (de) * 1982-06-29 1983-12-29 Korkmaz, Feridun, Dr.-Ing., 1000 Berlin Mess- und ueberwachungssystem fuer hydrospeicher
CN2052082U (zh) * 1989-02-25 1990-01-31 赵方 增压储能器
DE10207598A1 (de) * 2001-02-23 2002-11-07 Continental Teves Ag & Co Ohg Druckmittelspeicher
US20060055531A1 (en) * 2004-09-14 2006-03-16 Honeywell International, Inc. Combined RF tag and SAW sensor
DE112006001530A5 (de) * 2005-06-29 2008-04-03 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Hydraulischer Druckspeicher
DE102008015830A1 (de) * 2007-04-05 2008-10-09 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Hydraulischer Druckspeicher

Also Published As

Publication number Publication date
DE112010001915A5 (de) 2012-05-31
CN102405352A (zh) 2012-04-04
CN102405352B (zh) 2015-11-25
DE102010018195A1 (de) 2011-02-10
WO2010127660A3 (fr) 2011-09-15

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