WO2016131860A1 - Dispositif pour l'amortissement de variations de pression - Google Patents

Dispositif pour l'amortissement de variations de pression Download PDF

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Publication number
WO2016131860A1
WO2016131860A1 PCT/EP2016/053344 EP2016053344W WO2016131860A1 WO 2016131860 A1 WO2016131860 A1 WO 2016131860A1 EP 2016053344 W EP2016053344 W EP 2016053344W WO 2016131860 A1 WO2016131860 A1 WO 2016131860A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure medium
expansion
pressure
suction chamber
chamber
Prior art date
Application number
PCT/EP2016/053344
Other languages
German (de)
English (en)
Inventor
Johann Riepl
Michael Schnell
Bernd SEGGEWISS
Stefan Weickmann
Original Assignee
Conti Temic Microelectronic 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 Conti Temic Microelectronic Gmbh filed Critical Conti Temic Microelectronic Gmbh
Publication of WO2016131860A1 publication Critical patent/WO2016131860A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B60N2/665—Lumbar supports using inflatable bladders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for
    • B60N2/914—Hydro-pneumatic adjustments of the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F04C29/0035—Equalization of pressure pulses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Definitions

  • the present invention relates to a device for damping pressure fluctuations occurring in a pressure medium, in particular for a pressure medium pump. Furthermore, the invention relates to a pressure medium pump, in particular for a pneu ⁇ matic adjustment of a vehicle seat.
  • a pressure medium in particular with compressed air bubbles as adjusting elements in a region of the seat or seat back (together referred to as seating surface) and can be supplied via a respective pressure medium line with pressure medium.
  • a respective bladder By filling a respective bladder with pressure medium whose volume is increased, thereby the properties of a seat back or seat in the contour can be changed.
  • this massage and massage functions for a passenger in the vehicle seat are possible by a regular or dynamic change in the contour of the seat back or seat.
  • a pressure medium source such as a compressor
  • a corresponding valve in particular an electropneumatic valve in a control unit to a respective bladder.
  • pneumatic arrangements such as a just mentioned pneumatic adjustment arrangement for a vehicle seat are installed as comfort functions in the passenger compartment. It is important that the noise level in the passenger compartment is so low that the noise of the just mentioned components, such as the pneumatic adjustment in their operation by the passengers or the driver are not bothersome.
  • a compressor such as a vane cell compressor, is used for the pressure medium generation in an adjustment arrangement for the vehicle seat.
  • Such a compressor generates due to the design of the pressurized pressure medium with pulsations or Druckschwan ⁇ effects. This usually results in noise emissions that are unacceptable to passengers in the passenger compartment.
  • the object of the present invention is to reduce the noise generated by pressure fluctuations, especially in a pneumatic adjustment arrangement.
  • a device for damping pressure medium fluctuations in a pressure medium.
  • this device is preferably used in or for a pressure medium pump in order to dampen fluctuations in the pressure medium directly at the place of formation. to prevent .
  • the device comprises a housing which encloses a damper volume. Further, it has a partition wall for dividing the damper volume in an on ⁇ suction channel and a pressure channel. The two channels are separated by fluid pressure or fluid technology.
  • a first expansion element is arranged in the intake channel, which subdivides the intake channel into a first intake chamber and a first expansion chamber, so that pressure fluctuations or pulsations in the pressure medium are damped when flowing from the first intake chamber through the first expansion element into the first expansion chamber.
  • a second expansion element is provided, which divides the pressure channel into a second Ansaughunt- and into a second expansion chamber, so that pressure fluctuations in the pressure medium are attenuated when flowing from the second suction chamber through the second expansion element in the second expansion chamber.
  • the device serves to dampen pressure fluctuations, in particular for direct connection to a pressure medium pump, so that the pressure fluctuations or pulsations are attenuated or prevented on the one hand directly at the place of formation, so as a possible gain or increase the pulsations of the device for damping prevent pressure fluctuations subsequent components of a pneumatic arrangement.
  • the installation space can be minimized by damping the pressure fluctuations for two flow directions (during suction and pressure delivery) of the pressure medium in a single device.
  • the housing has a first end portion in which the first suction chamber and the second expansion chamber are disposed, and has a second end portion in which the first pressure chamber and the second suction chamber are arranged. In this way, two pressure fluid flows in the intake and in
  • the first suction chamber and the second expansion chamber are closed by a common end plate at the first end portion. In this way, further components can be reduced and also the device complexity can be minimized. It is also conceivable that in the second section, the second suction chamber and the first expansion chamber are closed by a common end plate. According to a further embodiment, an above-mentioned end plate has at least one through-passage or one
  • the device comprises a first filter element for filtering out particles from the pressure medium, wherein the filter element is preferably provided in the first suction chamber.
  • the filter element is preferably provided in the first suction chamber.
  • the first filter element (or other filter elements) can be used after removing the end plate in a simple way in the suction or, if necessary, can be easily replaced again.
  • the first filter element may contain foam, while the second filter element may comprise a filter paper. Both filter elements are preferably arranged in flow direction ⁇ after another in the first suction chamber and held between the end plate and the first expansion ⁇ element of the housing in the first end portion.
  • the outer contours of the first and / or the second filter element cooperate in a form-fitting manner with the inner contours of the first suction chamber, so as to prevent a movement or deformation of the filter element or elements.
  • the first suction chamber or the enclosing part of the housing in the inner contour and the corresponding outer contour of the filter or the filter elements are constructed unsym ⁇ metric, so that in particular a moving or twisting is not possible.
  • a connection for connecting the first expansion chamber to the inlet of a pressure medium pump is provided (in particular at the second end section of the device) and is a further connection to the Connecting the second suction chamber with the outlet (pressure medium outlet) of the pressure medium pump provided.
  • the device for damping pressure fluctuations can be easily connected to the pressure medium pump, can be placed on it on ⁇ , or be fixed in a similar manner.
  • the first and / or the second expansion element is designed such that it has one or more diffuser elements.
  • the diffuser element or elements are arranged in the device so as to act from the respective suction chamber toward the expansion chamber, i. that a pressure medium flow coming from the suction chamber expands forth and is thus reduced in speed in the direction of the respective expansion chamber, so as to dampen the pressure fluctuations or pulsations.
  • the first and / or the second expansion element it is conceivable for the first and / or the second expansion element to have one or more through-holes each having a widening diameter as diffuser elements, an expansion element formed in this way being aligned in the device such that the one or more through-holes expand in diameter from a respective suction chamber to a corresponding expansion chamber.
  • the first and / or second expansion element preferably has a plate in which the through holes are provided. In this way, there is provided a method and apparatus with little technical effort to formative expansion element which can be arranged in a per ⁇ bib suction chamber port or pressure port.
  • the housing has a hollow cylindrical body (in the interior of the damper volume is provided). Especially the partition then runs parallel to the cylinder axis of the hollow cylindrical body. Furthermore, it is conceivable that the first and the second expansion element is then aligned perpendicular to the cylinder axis. Due to the design of the housing with a hollow cylindrical body, on the one hand, a space-saving construction of the device can be created and, moreover, the shape of the hollow cylinder can be adjusted, for example, according to the shape of the Druckmit ⁇ tel pump to be connected or their connections, so on the one hand an attractive appearance and moreover to achieve a space- saving design of the entire pressure medium source.
  • the main body including the partition wall and the two expansion elements in one piece, in particular in the form of a
  • the base body made of plastic or a light metal, such as aluminum can be produced. In this way, a production with low procedural ⁇ technical effort is possible.
  • a pressure medium pump in particular for a pneumatic arrangement, such as a pneumatic adjustment arrangement for a vehicle seat, having the following features is provided. It has an inlet for drawing in pressure medium, such as air. Further, it has an outlet for discharging pressurized
  • Pressure medium comprises a device for damping pressure fluctuations as described above or an embodiment thereof, wherein the first expansion chamber of the device with the inlet of the device and the second
  • Suction chamber of the device is connected to the outlet of the device. Since the second suction chamber is connected in cooperation with the outlet of the pressure medium pump, it can also be referred to as a pressure chamber in such a case.
  • intake port and pressure channel indicate that, especially when used with a pressure medium pump, the intake port of the device for damping pressure fluid fluctuations with the inlet of the pressure medium pump for the suction of pressure medium, and the
  • Pressure channel of the device is connected to the outlet of the pressure medium pump for outputting pressurized pressure medium.
  • Figure 1 is a schematic sectional view of a device for damping pressure fluctuations in a pressure medium according to a first embodiment
  • Figure 2 is a schematic detail view of an expansion ⁇ elements of the device of Figure 1
  • Figure 4 is a schematic representation of an apparatus for
  • Figure 5 is a schematic front view of the device for
  • FIG. 6 is a schematic exploded view of the device for damping pressure fluctuations of Figure 4, in which in particular also filter elements for filtering out particles from the pressure medium can be seen.
  • FIG 1 a device DV for damping pressure fluctuations in a pressure medium DM, in particular in the form of air, is shown.
  • the device DV is particularly adapted to be directly connected to a pressure medium pump FZP (see Figure 3) to pressure fluid fluctuations that occur especially during operation of the pressure medium pump, at the location of Ent ⁇ to dampen or prevent it from occurring.
  • FZP pressure medium pump
  • the device DV comprises a housing GH enclosing a damper volume DVO. This damper volume is divided by a partition wall TW into an intake passage ASK and a pressure passage DKK.
  • a first expansion element EE1 is arranged therein, which subdivides the intake duct ASK into a first intake chamber AK1 and a first expansion chamber EK1.
  • a second expansion element EE2 is arranged therein, which divides the pressure channel DKK into a second suction chamber AK2 and a second expansion chamber EK2.
  • the first suction chamber AK1 and the second expansion chamber EK2 are covered or closed by a common end plate AD.
  • this end plate has an inlet opening DE for admitting pressure medium into the first suction chamber AK1.
  • the arrangement of the first expansion element EE1 causes the velocity of a pressure medium DM flowing in the suction chamber ASK (in the lower left of the device DV) to flow through the first expansion element EE1 due to the diffuser provided therein. reduced sorimplantation.
  • This expansion of the pressure medium DM through the diffuser elements (illustrated by a divergence of the pressure medium flow arrows) of the first Ex ⁇ expansion element EE1 causes not only a reduction in the speed of the pressure fluid flow, but also a reduction of pressure fluctuations or pulsations in the pressure medium.
  • the expanded in the first expansion chamber EK1 pressure fluid then flows via a corresponding pump-side outlet port DFA into a pressure medium inlet FE of the pressure medium pump, is compressed there and is pressurized and out of the pressure medium pump FZP blank at a pressure central outlet FA again ⁇ .
  • the pressure medium pump may be, for example, a compressor, such as a vane compressor.
  • the pressurized pressure medium DM flows via a pump-side pressure medium inlet DFE into the second suction chamber AK2. Due to the operation of the pressure with ⁇ telpumpe FZP are in the pressure medium pressure fluctuations fact, the choice now to be damped by means of a second expansion member EE2 or prevented.
  • the operation of the second expansion element EE2 is the same as that of the first expansion element.
  • this second Ex ⁇ pansionselement EE2 turn diffuser elements, through which the flowing pressure fluid is expanded DM what has been illustrated by the widening pressure fluid flow arrows in the figure. The expansion of the pressure medium again leads to a reduction of the flow velocity and thus to a reduction of the pressure medium.
  • this has a main body GK, which has a hollow cylindrical shape.
  • the partition wall is arranged in this hollow cylinder such that it runs parallel to a cylinder axis ZA.
  • the respective expansion elements EE1 and EE2 are aligned such that they are perpendicular to the cylinder axis ZA.
  • another arrangement of the expansion elements EE1 and EE2 is conceivable, for example, at an angle to the cylinder axis ZA.
  • this has a left or first end portion ABL, in or on which the first suction chamber AK1 and the second expansion chamber EK2 are arranged. Further, the device has a right or second end portion AB2, on or in which the first expansion chamber EK1 and the second suction chamber AK2 are arranged. Due to this design of the device DV, the intake flow through the intake passage ASK runs in the opposite direction to the pressure medium flow in the pressure channel DKK.
  • the construction has the advantage that the device DV, as already mentioned above, thus on the one hand has a small space, and on the other hand is so easily adapted that they to a pressure medium inlet FE and a pressure medium outlet FA to a contact portion of the pressure medium pump FZP to simple Way is attachable.
  • the housing GH including the main body GK, and the partition and the two expansion elements are advantageous legally integrally formed, and may be made of plastic or aluminum. In this way, a production with little procedural effort is possible.
  • Figure 2 in which a schematic
  • FIG. 1 Detail view of the expansion element EE1 or EE2 is shown.
  • This comprises a plate PL, in which one or through-holes are provided as diffuser elements DL. Viewed from left to right, the through holes widen from a first diameter D 1 to a larger diameter D 2 (DKD 2), so that the speed increases due to these diameter or cross-sectional enlargements for a pressure medium flowing from the left (suction chamber) to the right (expansion chamber) of the pressure medium and thus pressure fluctuations or pulsations in the pressure medium can be reduced.
  • DKD 2 diameter D 2
  • this pneumatic displacement arrangement PVA comprises a pressure medium pump FZP (for example in the form of a vane pump), which is connected to a device for damping pressure fluctuations.
  • FZP for example in the form of a vane pump
  • the device DV can be designed in accordance with the device DV according to FIG.
  • the device for damping pressure fluctuations according to the embodiments in Figures 4 to 6 is formed.
  • pressure medium DM flows through an inlet opening DE of the device DV into the corresponding intake duct ASK (see also Figure 1), is attenuated with respect to any existing pressure fluctuations in order to effect a noise reduction, and then flows into the pressure medium pump FZP. There it is compressed by a Ver ⁇ density unit VDE or pressurized and then flows into the pressure channel DKK of the device DV, there again to dampen the pressure fluctuations or pulsations in the pressure medium due to the operation of the pump FZP.
  • the "damped" pressure means DM then flows via the outlet ⁇ opening DA in a pressure medium supply line DML to a valve (in particular an electro-pneumatic valve EPV), which is electrically controlled by a control unit STE.
  • the pressure medium flow can be controlled by the pressure medium supply line DML such be that the pressure medium is either blocked at the valve EPV or that it is passed to the pressure medium line DL1 or DL2 ..
  • the pneumatic adjusting arrangement PVA further comprises a first bladder Bl and a second bladder B2, via the respective pressure medium lines DL1 and DL2 with the
  • the pressurized pressure medium DM flows into the bubbles B1 and B2, respectively, so that the volume of the bubbles is increased by the pressure medium when used as adjusting elements in a region of the seat surface or seat back of a vehicle seat FZS are arranged, which change the corresponding contour of the seat back or seat surface.
  • static functions such as a lumbar support can be achieved by means of the bladder Bl or B2, or even regular or dynamic functions such as massage functions as comfort application.
  • the device DV as a damper, in particular by the operation of the pump FZP resulting pressure fluctuations and thus corresponding No ⁇ ions ⁇ sions, namely to an acceptable level for the passenger or the driver.
  • Figure 4 a device for damping pressure fluctuations in a pressure medium according to a second embodiment of the invention is shown in a view obliquely from the front and side.
  • the device DV1 in terms of construction with respect to the channels and chambers as well as the expansion elements substantially corresponds to the device DV in Figure 1, wherein the main difference with respect to Figure 5 will be explained in more detail.
  • the device DV1 is directly connected in its second end section AB2 or right end section shown in the figure to a pressure medium pump FZP, for example a vane compressor.
  • a pressure medium pump FZP for example a vane compressor.
  • FZP for example a vane compressor.
  • an end plate AD is provided on the main body GK of the housing GH, which is fastened to the main body by means of screws S.
  • an inlet port DE is provided through which pressure medium DM flows into the device DV1, more specifically into the first suction chamber AK1 corresponding to the structure of FIG.
  • FIG. 5 in which the device shown in FIG. 4 for damping pressure fluctuations with the end plate AD removed is shown.
  • six threaded recesses or holes SL are provided in the main body GK, which can cooperate with the screws S of Figure 4, to attach the end plate AD on the base body by screwing the screws S.
  • a pressure medium outlet DA is shown, through which pressurized pressure medium DM flow to a special pneumatic connection, such as, for example, to the valves or bubbles of a pneumatic adjustment arrangement for a vehicle seat can.
  • This outflowing pressure medium DM comes from the second expansion chamber EK2, after it has flowed through the second expansion element EE2, possibly contained pressure fluid fluctuations ⁇ or pulsations have been damped.
  • a sealing element ABD is shown, which is intended to lead in contact with the end plate AD to a fluid-tight space or to a fluid-tight second expansion chamber EK2 or a fluid-tight suction chamber adjacent thereto.
  • the essential difference between the device DV1 and the device DV is that a (first) pressure medium filter LF1 is provided in the first suction chamber (AK1). This serves to remove located in a sucked pressure medium particles P, so as to prevent clogging located in an associated pneumatic system, or in an associated pneumatic arrangement pressure medium lines.
  • FIG. 6 in which an exploded view of the device DV1 shown in FIG. 4 is shown, it can also be seen that a second or further pressure medium filter LF2 is provided in addition to the first pressure medium filter LF1.
  • the first pressure medium filter LFl can be designed as a coarse filter material with a foam material, while the second filter LF2 also can be used from small particles as a fine filter for example with a Filterpa ⁇ pierelement for filtering.
  • FIG. 6 in which an exploded view of the device DV1 shown in FIG. 4 is shown, it can also be seen that a second or further pressure medium filter LF2 is provided in addition to the first pressure medium filter LF1.
  • the first pressure medium filter LFl can be designed as a coarse filter material with a foam material
  • the second filter LF2 also can be used from small particles as a fine filter for example with a Filterpa ⁇ pierelement for filtering.
  • the respective outer contours of the filter elements LF1 and LF2 are adapted to the inner contours of the first suction chamber AK1, so that a positive connection is created which prevents a movement (twisting) of the filter elements and thus a reduced filter property.
  • the in the Figures 4 to 6 shown device DVL has advantageously used the space of the first suction chamber as an additional function to provide one or more filter elements therein. In particular, these filter elements are then held between the end plate AD and the first expansion element EEL (as well as the partition wall and the base body.
  • the device DVL respect not only fulfills a damping ⁇ property pressure medium fluctuation or Druckstoffpulsation, but also a filter, without the Such a dimensionally minimized pulsation damper with integrated pressure medium filter is thus well suited for use in a motor vehicle since there is generally little space for additional components in the vehicle interior.
  • a device for damping pressure fluctuations in a pressure medium with a housing in which an intake passage is provided.
  • an expansion element is arranged, which divides the intake passage into a first suction chamber and an expansion chamber, so that pressure fluctuations in the pressure medium are attenuated when flowing from the suction chamber through the first expansion element in the first expansion chamber.
  • a filter element for filtering out particles from the pressure medium in the suction chamber is provided. In this way, the Druckmit ⁇ telfilter is integrated into the device, without increasing the Ab ⁇ measurements of the device.

Abstract

L'invention concerne un dispositif (DV) pour l'amortissement de variations de pression dans un fluide sous pression (DM). Il présente un boîtier (GH) qui entoure un volume d'amortisseur (DVO). Il présente en outre une paroi de séparation (TW) pour répartir le volume d'amortisseur en un canal d'aspiration (ASK) et un canal de pression (DKK). Le canal d'aspiration est divisé par un premier élément de dilatation (EE1) en une première chambre d'aspiration (AK1) et une première chambre de dilatation (EK1), de telle sorte que des variations de pression dans le fluide sous pression lors de l'écoulement à travers la première chambre d'aspiration sont amorties par le premier élément de dilatation dans la première chambre de dilatation. Pour la même raison, un deuxième élément de dilatation (EE2) est disposé dans le canal de pression, qui divise le canal de pression en une deuxième chambre d'aspiration (AK2) et une deuxième chambre de dilatation (EK2). Un filtre à fluide sous pression est en particulier encore intégré dans la première chambre d'aspiration, de telle sorte que le dispositif sert non seulement d'amortisseur, mais également de filtre à fluide sous pression.
PCT/EP2016/053344 2015-02-19 2016-02-17 Dispositif pour l'amortissement de variations de pression WO2016131860A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015203022.9A DE102015203022A1 (de) 2015-02-19 2015-02-19 Vorrichtung zur Dämpfung von Druckschwankungen
DE102015203022.9 2015-02-19

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WO2016131860A1 true WO2016131860A1 (fr) 2016-08-25

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WO (1) WO2016131860A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020207056A1 (de) 2020-06-05 2021-12-09 Conti Temic Microelectronic Gmbh Flügelzellenverdichteranordnung und pneumatische Verstellvorrichtung mit einer derartigen Anordnung

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JPS6022082A (ja) * 1983-07-18 1985-02-04 Nippon Denso Co Ltd 圧縮機の消音装置
US20040170516A1 (en) * 2003-02-28 2004-09-02 Hinchey Ronald R. Rotary vane pump with multiple sound dampened inlet ports
DE102012203480A1 (de) * 2012-03-06 2013-09-12 Conti Temic Microelectronic Gmbh Pneumatische Verstellanordnung für einen Fahrzeugsitz

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DE3625566A1 (de) * 1986-07-29 1987-01-02 Escher Wyss Gmbh Daempfungsvorrichtung fuer eine fluessigkeitsstroemung
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Publication number Priority date Publication date Assignee Title
JPS6022082A (ja) * 1983-07-18 1985-02-04 Nippon Denso Co Ltd 圧縮機の消音装置
US20040170516A1 (en) * 2003-02-28 2004-09-02 Hinchey Ronald R. Rotary vane pump with multiple sound dampened inlet ports
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