EP0085945B1 - Module à membrane pour système de commande pneumatique - Google Patents

Module à membrane pour système de commande pneumatique Download PDF

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Publication number
EP0085945B1
EP0085945B1 EP83100988A EP83100988A EP0085945B1 EP 0085945 B1 EP0085945 B1 EP 0085945B1 EP 83100988 A EP83100988 A EP 83100988A EP 83100988 A EP83100988 A EP 83100988A EP 0085945 B1 EP0085945 B1 EP 0085945B1
Authority
EP
European Patent Office
Prior art keywords
membrane
membranes
disks
tightening
comparing
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
EP83100988A
Other languages
German (de)
English (en)
Other versions
EP0085945A1 (fr
Inventor
Vladimir Dr. Multrus
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.)
Honeywell GmbH
Original Assignee
Honeywell 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 Honeywell GmbH filed Critical Honeywell GmbH
Publication of EP0085945A1 publication Critical patent/EP0085945A1/fr
Application granted granted Critical
Publication of EP0085945B1 publication Critical patent/EP0085945B1/fr
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
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C5/00—Manufacture of fluid circuit elements; Manufacture of assemblages of such elements integrated circuits
    • 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
    • F15B5/00—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C3/00—Circuit elements having moving parts
    • F15C3/04—Circuit elements having moving parts using diaphragms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2278—Pressure modulating relays or followers
    • Y10T137/2409—With counter-balancing pressure feedback to the modulating device

Definitions

  • the present invention relates to a membrane module for pneumatic control systems according to the preamble of claim 1.
  • Membrane modules of this type can be used in devices for regulating or controlling controlled variables, in particular in pressure-medium-operated controllers, ratio relays, addition relays or the like.
  • known devices of this type as described, for example, in the book by Hengstenberg, “Measures and Rules in Chemical Technology, Springer Verlag 1964, pages 1159 and 1170, in particular with reference to Figures 127 and 136, the entire membrane package is by means of a Bridge firmly connected. The firm clamping of the membrane plate in the membranes, as well as the implementation and fixation of this web, makes it difficult with these known so-called bushing regulators to center the entire membrane package and its parallel alignment with respect to the nozzle of the force / pressure converter.
  • a pneumatic membrane module known from DE-A-2529457.
  • the membrane plates are loosely stacked in the housing, with flat, thin, comparison membranes arranged in between acting on the membrane plates. Sealing membranes with a negligible effective area demarcate the individual stages.
  • the entire diaphragm plate package is centered by adapting the diaphragm plate diameter to the recess in the housing.
  • the membrane plates In order to be able to specify an effective membrane area, the membrane plates must have a stepped diameter. While this known membrane module has proven itself overall, there are tolerance and friction problems due to the adjustment of the membrane plate diameter to the housing recess, especially when plastic injection molded parts are used.
  • the pneumatic membrane module consists of several stacked disc-shaped housing parts 11-16, in which air channels and chambers are incorporated in a known manner, which need not be explained in the present case.
  • the upper housing part 16 also forms the lower part of a pressure divider 17, the upper part of which consists of an adjusting button 18 which is pressed against the lower part 16 by means of a screw 19 with the interposition of an elastic sealing ring 20.
  • the screw 19 cooperates with a lock nut 21, and an interposed disc spring 22 specifies a defined contact pressure.
  • An additional seal is specified via an O-ring 23.
  • the pressure divider 17 is a known pressure divider of the type described in DE-A-2 509 963. A more detailed explanation of the structure and mode of operation of the pressure divider is therefore not necessary.
  • Each housing part 11 to 16 is provided with a central recess or chamber 24 to 29, the chambers 24, 25; 26, 27 and 28, 29 face each other in pairs and are separated from one another by comparison membranes 30, 31 and 32. Sealing membranes 33 and 34 seal the individual systems against one another.
  • the comparison and sealing membranes located inside the entire package each have a central hole 35. Through this hole, membrane plates 36 to 39 arranged in the recesses 25 to 28 extend with pin extensions 40, the pin extensions 40 in corresponding recesses 41 in the respectively opposite membrane plate intervention.
  • the depth of the recesses 41 is matched to the length of the pin attachments 40 such that ring webs 42 on the membrane plates are pressed into the comparison and sealing membranes between the membrane plates by a defined amount and achieve a corresponding sealing effect.
  • the final meme of the package Brant plates 36, 39 and comparison membranes 30, 32 have a special design in that the outwardly facing plane surfaces of the membrane plates are provided with an annular groove 43, in each of which an annular collar 44 arranged on the membrane engages. As a result, the entire package is guided in its axial movement and secured against lateral displacement and asymmetry.
  • FIG. 1a again shows schematically the pneumatic membrane module according to FIG. 1 and its signal application.
  • the module has the function of a pneumatic P controller, with a target / actual value comparison being carried out on the central comparison membrane by connecting the pressures Pw and p x .
  • the lower chamber is fed by the supply air pressure p z and partially vented to the atmosphere via a nozzle / baffle plate system, which results in a variable outlet pressure p, depending on the setpoint / actual value comparison.
  • This output pressure P A applied in the sense of a negative feedback from the bottom and in the sense of a positive feedback from above the membrane / plate package.
  • the size of the positive feedback can be variably specified via the pressure divider.
  • FIGS. 2 and 2a The exemplary embodiment shown in FIGS. 2 and 2a is essentially a ratio module, the structure and function of which has already been described in principle in DE-A-2 529 457 with reference to FIGS. 2a to 2c.
  • the new construction principles already described with reference to FIG. 1 were also used in this module, which is expressed by the use of the same reference numbers.
  • the module therefore does not need to be described again in this regard.
  • a membrane 45 and a cover plate 46 are arranged under the pressure divider 17, the cover plate 46 serving in a manner not shown to accommodate compressed air channels.
  • the loose stacking of the diaphragm plates 36, 39 advantageously allows them to be lifted apart, which enables the starting point to be set independently of the ratio coefficient.
  • the ratio coefficient is predetermined by the quotient from the effective area of the membrane 32 to the effective area of the membrane 30 and can be changed by adjusting the pressure divider.
  • the starting point is predetermined by the point at which the divided inlet pressure p x exceeds the starting point pressure Pw .
  • the initial pressure p can be shifted overall in the ordinate direction. This fact can be found in more detail in the aforementioned DE-A-2529457.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Reciprocating Pumps (AREA)

Claims (3)

1. Bloc modulaire à membranes pour un système de régulation pneumatique, comportant au moins un étage de comparaison de pression (31, 37, 38) qui transforme en un effort une différence de pression, et un convertisseur effort/pression (11, 30, 36), asservi à l'étage de comparaison de pression ; des chambres de travail (24-29) étant déterminées par des membranes de comparaison et des membranes d'obturation (30-34) dans un boîtier en plusieurs parties (11-16), et agencées pour recevoir les pressions qu'il s'agit de comparer entre elles ; et des disques (36-39) associés aux membranes étant montés en pile sans liaison rigide dans le boîtier, pour recevoir les efforts des membranes de comparaison, dont la résultante se trouve alors traduite en un déplacement correspondant des disques précités ; le bloc modulaire étant remarquable par les caractéristiques suivantes :
a) les disques (36-39) associés aux membranes sont pourvus de bossages centraux, dont chacun est pourvu tantôt d'un doigt axial de liaison (40) et tantôt d'un logement (41) adapté à recevoir ce doigt, le doigt de liaison d'un disque passant à travers un trou central (35) d'une membrane associée de comparaison ou d'obturation (31 ou 33, 34), pour pénétrer dans le logement (41) du disque adjacent ;
b) le boîtier (11-16) et les disques (36-39) associés aux membranes présentent chacun des faces d'appui annulaires (42) disposées en regard l'une de l'autre, pour venir, lorsqu'une pression est appliquée, en appui étanche sur les membranes (30-34) ;
c) au moins deux des disques (36-39) associés aux membranes comportent chacun une face plane, où est ménagée une gorge annulaire (43) centrée sur l'axe de la pile des disques, pour recevoir un bourrelet annulaire concentrique (44) de la membrane correspondante (30, 32).
2. Bloc modulaire selon la revendication 1, caractérisé en ce que les doigts de liaison axiaux (40) des disques ont chacun une longueur qui dépasse d'une certaine quantité la profondeur de chacun des logements axiaux associés (41), cette quantité étant inférieure à l'épaisseur de la membrane de comparaison ou d'obturation (30-34) prévue pour être montée entre les deux disques de chaque paire.
3. Bloc modulaire selon la revendication 1, caractérisé en ce que les gorges annulaires (43) sont ménagées dans les faces externes des disques (36, 39) situés aux deux extrémités de la pile de disques du bloc considéré.
EP83100988A 1982-02-06 1983-02-03 Module à membrane pour système de commande pneumatique Expired EP0085945B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823204100 DE3204100A1 (de) 1982-02-06 1982-02-06 Membranmodul fuer pneumatische regelungssysteme
DE3204100 1982-02-06

Publications (2)

Publication Number Publication Date
EP0085945A1 EP0085945A1 (fr) 1983-08-17
EP0085945B1 true EP0085945B1 (fr) 1985-10-30

Family

ID=6154970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100988A Expired EP0085945B1 (fr) 1982-02-06 1983-02-03 Module à membrane pour système de commande pneumatique

Country Status (3)

Country Link
US (1) US4522220A (fr)
EP (1) EP0085945B1 (fr)
DE (2) DE3204100A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322958C2 (de) * 1993-07-09 1996-11-21 Freudenberg Carl Fa Aktives Stellelement
WO1997016626A1 (fr) * 1995-11-02 1997-05-09 Tetra Laval Holdings & Finance S.A. Ensemble piston-membrane
US5927177A (en) * 1997-12-22 1999-07-27 Tol-O-Matic, Inc. Multi-diaphragm actuator
US6286413B1 (en) 1998-02-20 2001-09-11 Tol-O-Matic, Inc. Diaphragm actuator
US8534315B2 (en) * 2008-05-16 2013-09-17 Fisher Controls International Llc Diaphragm assemblies for use with fluid control devices
JP5608599B2 (ja) * 2011-03-30 2014-10-15 アズビル株式会社 パイロットリレー
US10338611B2 (en) * 2017-09-13 2019-07-02 Unilok Corporation Regulator
CN109027397B (zh) * 2018-08-27 2019-03-26 辰星仪表（成都）有限公司 一种气动放大器
DE102018215300A1 (de) * 2018-09-07 2020-03-12 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Pneumatisches Stellglied, Abluftsystem, Gehäuse mit Abluftsystem, pneumatischer Aktuator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3169402A (en) * 1961-08-16 1965-02-16 Sheffield Corp Pressure differential gage
FR1396001A (fr) * 1964-04-21 1965-04-16 Robertshaw Controls Co Relais pneumatique
US3461896A (en) * 1966-07-01 1969-08-19 Johnson Service Co Fluid proportional controller
FR2034260B2 (fr) * 1969-03-05 1973-10-19 Valves Et Produits Indls
NL7102074A (fr) * 1971-02-17 1972-08-21
FR2300923A1 (fr) * 1975-02-14 1976-09-10 Foxboro Co Unite logique pneumatique
DE2529457C3 (de) * 1975-07-02 1982-03-25 Honeywell Gmbh, 6000 Frankfurt Membranmodul für pneumatische Regelungssysteme
US4245549A (en) * 1978-09-18 1981-01-20 Robertshaw Controls Company Control device diaphragm stack and method of making the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Hengstenberg "Messen und Regeln in der chemischen Technik", Springer Verlag 1964, S. 1159 und 1170 *

Also Published As

Publication number Publication date
DE3361089D1 (en) 1985-12-05
DE3204100A1 (de) 1983-08-18
US4522220A (en) 1985-06-11
EP0085945A1 (fr) 1983-08-17

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