EP0565510A2 - Transducteur de signal électro-pneumatique - Google Patents

Transducteur de signal électro-pneumatique Download PDF

Info

Publication number: EP0565510A2
Authority: EP; European Patent Office
Prior art keywords: bending element; support; insertion sleeve; adjustment; signal converter
Prior art date: 1992-04-03
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.): Granted

Application number

EP93890039A

Other languages

German (de)

English (en)

Other versions

EP0565510A3 (fr

EP0565510B1 (fr

Inventor

Johannes Wirtl

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.)

Hygrama AG

Original Assignee

Hoerbiger Ventilwerke GmbH and 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.)

1992-04-03

Filing date

1993-03-10

Publication date

1993-10-13

1993-03-10 Application filed by Hoerbiger Ventilwerke GmbH and Co KG filed Critical Hoerbiger Ventilwerke GmbH and Co KG

1993-10-13 Publication of EP0565510A2 publication Critical patent/EP0565510A2/fr

1994-12-14 Publication of EP0565510A3 publication Critical patent/EP0565510A3/xx

1997-02-26 Application granted granted Critical

1997-02-26 Publication of EP0565510B1 publication Critical patent/EP0565510B1/fr

2013-03-10 Anticipated expiration legal-status Critical

Status Expired - Lifetime 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
- 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
- F15B5/003—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 characterised by variation of the pressure in a nozzle or the like, e.g. nozzle-flapper system

Definitions

the invention relates to an electro-pneumatic signal converter, with a piezoelectric bending element, which rests elastically pretensioned on at least three support bearings, of which at least one can be adjusted relative to the seat (s) to be controlled, in order to adjust the bending element.
a signal converter of the type mentioned is known for example from EP-B1 191011.
the piezoelectric bending element is held there by a link spring anchored in the transmitter housing, pressed against the support bearing and, for example, bears against the supply air seat under spring preload.
an electrical voltage is applied to the bending element, it lifts off the supply air seat and closes the exhaust air seat.
the signal output of the signal converter which was vented through the exhaust air seat, is thereby connected to the supply air seat, so that the pressure medium supplied through the supply air seat is present at the signal output as a pneumatic pressure signal.
the voltage at the piezoelectric bending element is switched off or reversed, the bending element returns to the starting position, with the signal output being vented again.
This electro-pneumatic signal converter is characterized by a low power requirement and works without significant energy consumption, so that it can advantageously replace the conventional solenoid valves for the electrical actuation of pneumatic circuits and devices.
the three-point support of the piezoelectric bending element on the support bearings enables an initial adjustment or initial adjustment of the position of the bending element between the seats to be controlled.
this initial adjustment can also be carried out in particular by adjusting at least one of the three support bearings, the effects on the pneumatic output signal being easily observed.
the object of the present invention is to improve a signal converter of the type mentioned at the outset in such a way that the disadvantages described are avoided and, in particular, by further mechanical relaxation of the piezoelectric bending element which occurs after the initial adjustment, or also by adjustment errors which are only noticed subsequently, the production committee is not increased.
the adjustable support bearing has a support pin which is arranged in a concentric insertion sleeve, the position of which relative to the other support bearings is fixed after the adjustment, and which is adjustable in the axial direction with respect to the insertion sleeve .
the adjustable support bearing is therefore essentially made in two parts.
the outer part which is designed as a concentric insertion sleeve, can be secured, as is known, during the initial adjustment adjustment or after completion of the same relative to the housing or to the other support bearings, for example by gluing, pressing in or the like.
the second part which is designed as a support pin, can also be adjusted axially relative to the insertion sleeve after the initial adjustment or fixing of the first part, so that even after the initial adjustment of the signal converter, corrections are still possible, for example, to compensate for the described further mechanical relaxation.
the support pin in itself only requires very small adjustment paths, since the position errors of the bending element that occur after the initial adjustment are usually only relatively small. Unless additional securing for the adjustable support pin is to be provided relative to the insertion sleeve, the support pin must of course be relatively difficult to move in the insertion sleeve, so that unintentional adjustments are excluded.
the support bearing which can be adjusted for adjustment is also designed as an electrical contact for the bending element
the adjustable support pin serves directly as a contact pin. This enables a simple configuration of the signal converter, since both the support pin and the contact pin anyway need direct contact with the surface of the piezoelectric bending element or the electrodes attached there.
the support pin can have a thread which cooperates with the insertion sleeve and has a small pitch, which enables precise adjustment while at the same time making it easy to enable heavy Ver adjustability via the dimensioning of the interacting threads ensures.
the support pin can also have a beveled front end, which rests on a counter bearing projecting eccentrically to the support pin on the bending element. This also results in a simple and precise subsequent adjustability of the support pin relative to the insert sleeve.
FIG. 1 shows an axial section through a signal converter designed according to the invention along line II in FIG. 2
FIG. 2 shows a cross section along line II-11 in Fig. 1
Fig. 3 shows an axial section along the line III-III in Fig. 2.
the electrical-pneumatic signal converter according to FIGS. 1 to 3 consists of a transmitter housing 1, which forms a tightly closed chamber 2, in which a piezoelectric bending element 3 is arranged. A signal output 4 is led out of the chamber 2. In addition, a supply air seat 5 and an exhaust air seat 6 are inserted in mutually aligned bores of the housing 1. The piezoelectric bending element 3 is held and guided in the chamber 2 by a link spring 7. It controls the supply air seat 5 and the exhaust air seat 6. Contact pins 8 and 9 are inserted into the encoder housing 1 for supplying the electrical voltage to the piezoelectric bending element 3.
the encoder housing 1 consists of two solid plates 10 and 11, which are made of rigid, preferably electrically insulating material, e.g. made of ceramic or glass.
the chamber 2 is formed from flat recesses 12 and 13 in the plates 10 and 11. 1 and 3 in particular that the recesses 12, 13 in the plates 10, 11 tightly enclose the piezoelectric bending element 3 and the associated link spring 7, so that only the required play and the excess necessary for the manufacturing tolerances remain.
the two plates 10, 11 lie airtight on one another around the recesses 12, 13, and are preferably glued to one another.
the piezoelectric bending element 3 is supported in the chamber 2 essentially on three support bearings which are provided at a distance from one another.
the one support bearing 14 is formed in the exemplary embodiment from the lower end of a support pin which is simultaneously designed as a contact pin 8. This is inserted with an insertion sleeve 15 into a bore in the plate 11 of the encoder housing 1.
the other support bearings are designed here as tilting bearings 16, which protrude from the plate 11 into the chamber 2 in the shape of a knob. In Fig. 2, the two support or tilt bearings 16 are shown in dashed lines.
the link spring 7, which is shown in plan view in FIG. 2, has the task of pressing the piezoelectric bending element 3 against the support bearings 14 and 16.
a point-shaped support point 17 which is formed by a hemispherical bead, on the piezoelectric bending element 3, u. in a region lying in the axial direction between the support bearings 14 on the one hand and 16 on the other hand.
the support point 17 is provided on a tongue 18 which is formed by side incisions 19.
the link spring 7 is fastened by tabs 20 which protrude laterally beyond the piezoelectric bending element 3 and are clamped between the two plates 10 and 11 of the encoder housing 1.
the contact pins 9 anchored in the encoder housing 1 engage in bores in the tabs 20.
the voltage is also supplied via the contact spring 7 to the piezoelectric bending element 3.
a bead 21 running between the tabs 20 transversely to the link spring 7 forms a stiffening.
the bent edge 22 of the link spring 7, which protrudes into a groove 23 in the plate 10 of the transmitter housing 1, serves the same purpose and also for additional centering.
the link spring 7 also has laterally projecting retaining tabs 24 which are bent over the piezoelectric bending element 3 and hold it in place.
the piezoelectric bending element 3 is securely fastened and guided precisely by the link spring 7 in the transmitter housing 1. It presses the piezoelectric bending element 3 against the support bearings 14 and 16, which are mutually aligned so that the end of the piezoelectric bending element 3 is pressed onto the supply air seat 5 and seals it tightly. In this position, which is shown in FIG. 1, the signal output 4 is connected to the exhaust air seat 6 via the chamber 2 and is thus relieved of pressure. When an electrical voltage is supplied via the contact pins 8 and 9, the piezoelectric bending element bends, whereby it lifts off from the supply air seat 5 and closes off the exhaust air seat 6.
the pressure medium supplied through the supply air seat 5 can then enter the chamber and from there to the signal output 4, as a result of which the supplied electrical signal is converted into a pneumatic pressure signal.
the piezoelectric bending element 3 returns to the starting position, the signal output 4 being relieved of pressure again.
the three-point support of the piezoelectric bending element 3 on the plate 11 of the encoder housing 1, or on the support bearings 14 and 16, enables a precise adjustment of the position of the bending element 3 between the supply air seat 5 and the exhaust air seat 6.
An initial adjustment or adjustment is by axial Adjustment of the supply air seat 5 and the exhaust air Seat 6 and also the insertion sleeve 15 together with the support or contact pin 8 possible, the lower end of which forms the support bearing 14.
the insert sleeve 15 is fixed in its position relative to the transmitter housing 1, for which purpose the insert sleeve can be glued in the bore, for example.
the support or contact pin 8 is here interacting with the insertion sleeve 15 Thread 25 with a small pitch can be adjusted in the axial direction by rotation relative to the insertion sleeve 15, with the result that the support bearing 14 also remains adjustable or readjustable.
the support bearing 14 also remains adjustable or readjustable.

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Fluid Mechanics (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Transmission And Conversion Of Sensor Element Output (AREA)
Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Support Of The Bearing (AREA)
Measuring Fluid Pressure (AREA)

EP19930890039 1992-04-03 1993-03-10 Transducteur de signal électro-pneumatique Expired - Lifetime EP0565510B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
AT704/92		1992-04-03
AT70492A AT398331B (de)	1992-04-03	1992-04-03	Elektro-pneumatischer signalwandler

Publications (3)

Publication Number	Publication Date
EP0565510A2 true EP0565510A2 (fr)	1993-10-13
EP0565510A3 EP0565510A3 (fr)	1994-12-14
EP0565510B1 EP0565510B1 (fr)	1997-02-26

Family

ID=3497609

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19930890039 Expired - Lifetime EP0565510B1 (fr)	1992-04-03	1993-03-10	Transducteur de signal électro-pneumatique

Country Status (6)

Country	Link
EP (1)	EP0565510B1 (fr)
JP (1)	JPH0620553A (fr)
AT (1)	AT398331B (fr)
CA (1)	CA2093257C (fr)
DE (1)	DE59305506D1 (fr)
ES (1)	ES2098021T3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1997009555A1 (fr) *	1995-09-08	1997-03-13	Bürkert Werke GmbH & Co.	Soupape a lamelle piezoelectrique et procede de production d'une soupape
EP0915277A2 (fr)	1997-10-15	1999-05-12	Bürkert Werke GmbH & Co.	Vanne pièzo-électrique
DE19810009C1 (de) *	1998-03-09	1999-07-15	Honeywell Bv	Elektrisch betätigbares Kleinventil
DE19957953A1 (de) *	1999-12-02	2001-06-21	Festo Ag & Co	Verfahren und Vorrichtung zur Herstellung eines Piezoventils
EP1104863A3 (fr) *	1999-12-02	2002-11-13	Festo AG & Co	Soupape pièzo-électrique et procédé pour produire une soupape pièzo-électrique
DE10161888A1 (de) *	2001-08-14	2003-02-27	Continental Teves Ag & Co Ohg	Piezoelektrisch betätigtes Fluidventil
US6776180B1 (en)	1999-09-17	2004-08-17	Technolog Limited	Water distribution pressure control method and apparatus
US8220491B2 (en)	2007-07-20	2012-07-17	Hoerbiger Automatisierungstechnik Holding Gmbh	Piezoelectric valve

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5628411A (en) *	1994-12-01	1997-05-13	Sortex Limited	Valve devices for use in sorting apparatus ejectors
US20040144696A1 (en)	2003-01-29	2004-07-29	Stewart Mills	Valve device for use in sorting apparatus ejectors
JP4555129B2 (ja) *	2005-03-10	2010-09-29	株式会社ダイシン	流路切替ユニット、吸着保持ユニット、気圧作動ユニット及び部品搬送装置
DE102007033529A1 (de)	2007-07-19	2009-01-22	Hoerbiger Automatisierungstechnik Holding Gmbh	Piezoelektrisches Ventil
DE102007034049B3 (de)	2007-07-19	2008-06-12	Hoerbiger Automatisierungstechnik Holding Gmbh	Piezoelektrisches Ventil

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AT380934B (de) *	1983-01-13	1986-07-25	Enfo Grundlagen Forschungs Ag	Elektrisch-pneumatischer signalwandler
AT382431B (de) *	1985-02-08	1987-02-25	Enfo Grundlagen Forschungs Ag	Elektrisch-pneumatischer signalwandler
US4629926A (en) *	1985-10-21	1986-12-16	Kiwi Coders Corporation	Mounting for piezoelectric bender of fluid control device

1992
- 1992-04-03 AT AT70492A patent/AT398331B/de not_active IP Right Cessation
1993
- 1993-03-10 DE DE59305506T patent/DE59305506D1/de not_active Expired - Fee Related
- 1993-03-10 ES ES93890039T patent/ES2098021T3/es not_active Expired - Lifetime
- 1993-03-10 EP EP19930890039 patent/EP0565510B1/fr not_active Expired - Lifetime
- 1993-03-31 JP JP7366793A patent/JPH0620553A/ja active Pending
- 1993-04-02 CA CA 2093257 patent/CA2093257C/fr not_active Expired - Fee Related

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1997009555A1 (fr) *	1995-09-08	1997-03-13	Bürkert Werke GmbH & Co.	Soupape a lamelle piezoelectrique et procede de production d'une soupape
US5779218A (en) *	1995-09-08	1998-07-14	Burkert Werke Gmbh & Co.	Valve with piezoelectric lamina and a method of producing a valve
EP0915277A2 (fr)	1997-10-15	1999-05-12	Bürkert Werke GmbH & Co.	Vanne pièzo-électrique
DE19810009C1 (de) *	1998-03-09	1999-07-15	Honeywell Bv	Elektrisch betätigbares Kleinventil
US6776180B1 (en)	1999-09-17	2004-08-17	Technolog Limited	Water distribution pressure control method and apparatus
DE19957953A1 (de) *	1999-12-02	2001-06-21	Festo Ag & Co	Verfahren und Vorrichtung zur Herstellung eines Piezoventils
EP1104863A3 (fr) *	1999-12-02	2002-11-13	Festo AG & Co	Soupape pièzo-électrique et procédé pour produire une soupape pièzo-électrique
DE19957953C2 (de) *	1999-12-02	2003-08-28	Festo Ag & Co	Verfahren und Vorrichtung zur Herstellung eines Piezoventils
DE10161888A1 (de) *	2001-08-14	2003-02-27	Continental Teves Ag & Co Ohg	Piezoelektrisch betätigtes Fluidventil
US7017883B2 (en)	2001-08-14	2006-03-28	Continential Teves Ag & Co. Ohg	Piezoelectrically actuated fluid valve
US8220491B2 (en)	2007-07-20	2012-07-17	Hoerbiger Automatisierungstechnik Holding Gmbh	Piezoelectric valve

Also Published As

Publication number	Publication date
EP0565510A3 (fr)	1994-12-14
CA2093257C (fr)	2002-08-20
CA2093257A1 (fr)	1993-10-04
ES2098021T3 (es)	1997-04-16
AT398331B (de)	1994-11-25
JPH0620553A (ja)	1994-01-28
DE59305506D1 (de)	1997-04-03
ATA70492A (de)	1993-03-15
EP0565510B1 (fr)	1997-02-26

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Publication	Publication Date	Title
AT398331B (de)	1994-11-25	Elektro-pneumatischer signalwandler
EP0791152B1 (fr)	2003-03-05	Procede de production d'une soupape
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