EP0313539B1 - Vorrichtung zum Neutralisieren von Metallspänen in einem Druckmittelspeicher - Google Patents

Vorrichtung zum Neutralisieren von Metallspänen in einem Druckmittelspeicher Download PDF

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Publication number
EP0313539B1
EP0313539B1 EP88850356A EP88850356A EP0313539B1 EP 0313539 B1 EP0313539 B1 EP 0313539B1 EP 88850356 A EP88850356 A EP 88850356A EP 88850356 A EP88850356 A EP 88850356A EP 0313539 B1 EP0313539 B1 EP 0313539B1
Authority
EP
European Patent Office
Prior art keywords
piston
metal chips
scraper ring
pressure liquid
liquid accumulator
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.)
Expired
Application number
EP88850356A
Other languages
English (en)
French (fr)
Other versions
EP0313539A1 (de
Inventor
Olof Älund
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.)
GKN Aerospace Sweden AB
Original Assignee
Volvo Flygmotor AB
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 Volvo Flygmotor AB filed Critical Volvo Flygmotor AB
Publication of EP0313539A1 publication Critical patent/EP0313539A1/de
Application granted granted Critical
Publication of EP0313539B1 publication Critical patent/EP0313539B1/de
Expired legal-status Critical Current

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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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • 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
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with 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
    • F15B2201/20—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
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • 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

Definitions

  • the present invention refers to a device for neutralizing or rendering metal chips harmless, which occur at a scraper ring of a piston in a cylinder of a pressure liquid accumulator.
  • pressure accumulators in the form of a cylindrical chamber, in which a pressurized liquid, conventionally hydraulic oil, is confined by means of a piston under counter-pressure from a gas body.
  • a pressurized liquid conventionally hydraulic oil
  • the piston is moved in the emptying direction under the action of the gas body pressure, while when the accumulator is loaded, said piston moves in the opposite direction in the cylinder and compresses the gas body.
  • metal chips arise which accompany the pressure liquid.
  • DE-A 3 638 640 there is disclosed a pressure accumulator of the type defined in the preamble of claim 1.
  • the scraper ring thereof is provided for pushing the abrasive particles which accumulate in the hydraulic chamber in a collecting chamber located in an end plate of the housing. Ingress of the particles between ring and cylinder wall may still occur.
  • a rotary vane-type actuator is furthermore known from US-A 4 345 509, which includes in the actuator housing internal sump cavities that collect abrasive particles from the fluid and which hold such contaminants away from the path of movement of the vane.
  • a magnetic element at each sump attracts and holds ferromagnetic particles.
  • the object of the present invention now is to remedy said problem and this object is reached substantially in that radially inwardly of said scraper ring is mounted an annular strip of magnetic material for collecting the metal chips thereon. If, according to a preferred embodiment of the invention a free space is formed in the piston at the side of the scraper ring and strip closest to the head of the piston, the metal chips might be collected and retained there in a very advantageous manner.
  • a hydraulic pressure accumulator 1 has a cylindrical casing 2, which at one end is closed by means of an end plate 3.
  • a piston 4 which defines between itself and the end plate 3 a pressure liquid chamber 5.
  • the piston 4 defines a gas- filled space 6 within the cylindrical casing 2.
  • the piston 4 is sealed against the cylinder wall of the casing 2 by means of conventional piston rings 7 located in ring grooves.
  • a scraper ring 8 is located in a groove in a similar manner.
  • said scraper ring is formed with a front edge, which is inclined obliquely forwardly-outwardly as illustrated.
  • an annular strip 9 of magnetic material In order to render metal chips, i.e. of steel and similar materials which might be attracted by magnetic forces, harmless and prevent them from penetrating into the space between the scraper ring 8 and the cylinder wall of the casing 2 and cause damages of the aforementioned kind, which chips possibly occur in the pressure liquid, there is according to the invention radially inwardly of the scraper ring 8 arranged an annular strip 9 of magnetic material.
  • said magnetic strip 9 might be made in the form of a plastic-pressed elastic ring of e.g. samarium and cobalt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Sealing Devices (AREA)

Claims (2)

1. Vorrichtung zum Neutralisieren von Metallspänen, wie sie an einem Abstreifring (8) eines Kolbens (4) in einem Zylinder (2) eines Druckmittelspeichers entstehen, dadurch gekennzeichnet, daß radial innerhalb des Abstreifringes (8) ein ringförmiger Streifen (9) eines magnetischen Materials zur Ansammlung der Metallspäne darauf angeordnet ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß seitlich von dem Abstreifring (8) und dem Streifen (9), welche sich am nächsten zum Kolbenkopf befinden, eine freier Raum (10) im Kolben (4) zur Aufnahme der angesammelten Metallspäne vorgesehen ist.
EP88850356A 1987-10-23 1988-10-21 Vorrichtung zum Neutralisieren von Metallspänen in einem Druckmittelspeicher Expired EP0313539B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8704137A SE459275B (sv) 1987-10-23 1987-10-23 Anordning foer oskadliggoerande av metallspaanor i en tryckvaetskeackumulator
SE8704137 1987-10-23

Publications (2)

Publication Number Publication Date
EP0313539A1 EP0313539A1 (de) 1989-04-26
EP0313539B1 true EP0313539B1 (de) 1990-05-16

Family

ID=20369990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88850356A Expired EP0313539B1 (de) 1987-10-23 1988-10-21 Vorrichtung zum Neutralisieren von Metallspänen in einem Druckmittelspeicher

Country Status (4)

Country Link
EP (1) EP0313539B1 (de)
JP (1) JPH01158201A (de)
DE (1) DE3860156D1 (de)
SE (1) SE459275B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022000197A1 (de) 2022-01-20 2023-07-20 Hydac Technology Gmbh Hydrospeicher
DE102022000382A1 (de) 2022-02-01 2023-08-03 Hydac Technology Gmbh Hydrospeicher
DE102022000511A1 (de) 2022-02-10 2023-08-10 Hydac Technology Gmbh Hydrospeicher

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19740150A1 (de) * 1997-09-12 1999-03-25 Hydac Technology Gmbh Kolbenspeicher mit Tiefenfiltrationsdichtung
GB2420380A (en) * 2004-11-18 2006-05-24 Parker Hannifin Plc Twin piston gas filled hydraulic actuator
CN109538545A (zh) * 2018-12-25 2019-03-29 山东华阳众能动力科技有限公司 一种油箱及具有该油箱的液压系统
CN110374962A (zh) * 2019-06-24 2019-10-25 宁波海天金属成型设备有限公司 一种液压系统的油箱过滤装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4345509A (en) * 1980-06-23 1982-08-24 Caterpillar Tractor Co. Contaminant trap for fluid operated rotary actuator
SE447296B (sv) * 1985-11-25 1986-11-03 Stromsholmens Mek Verkstad Avstrykaranordning vid cylinder och axiellt rorlig kolv

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022000197A1 (de) 2022-01-20 2023-07-20 Hydac Technology Gmbh Hydrospeicher
DE102022000382A1 (de) 2022-02-01 2023-08-03 Hydac Technology Gmbh Hydrospeicher
DE102022000511A1 (de) 2022-02-10 2023-08-10 Hydac Technology Gmbh Hydrospeicher

Also Published As

Publication number Publication date
SE8704137L (sv) 1989-04-24
EP0313539A1 (de) 1989-04-26
JPH01158201A (ja) 1989-06-21
SE8704137D0 (sv) 1987-10-23
DE3860156D1 (de) 1990-06-21
SE459275B (sv) 1989-06-19

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