WO2002095241A1 - Vorrichtung und verfahren zur pneumatischen steuerung und regelung von druckmittelströmen - Google Patents
Vorrichtung und verfahren zur pneumatischen steuerung und regelung von druckmittelströmen Download PDFInfo
- Publication number
- WO2002095241A1 WO2002095241A1 PCT/DE2002/001682 DE0201682W WO02095241A1 WO 2002095241 A1 WO2002095241 A1 WO 2002095241A1 DE 0201682 W DE0201682 W DE 0201682W WO 02095241 A1 WO02095241 A1 WO 02095241A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channel
- pneumatic control
- regulating device
- slide element
- valve piston
- Prior art date
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/15—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor with special provision for automatic return
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
-
- 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
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2544—Supply and exhaust type
- Y10T137/2554—Reversing or 4-way valve systems
Definitions
- the invention relates to a control device. and regulation of pressure medium flows or of a method for controlling and regulating pressure medium flows.
- Pneumatic control and regulating circuits are used in a variety of technical applications.
- EP 0 812 743 B1 which describes a pressure-operated windshield wiper motor.
- the wiper motor of EP 0 812 743 B1 has a double-acting working cylinder in which two piston surfaces are pressurized against each other. Depending on the position of the drive, a reversing slide feeds the pressure medium in the area of the outer end positions of the piston surfaces and switches through for ventilation in the area of the inner end positions of the piston surfaces.
- the two pistons or piston surfaces are coupled via a mechanical connection and provided with a rack.
- the rack engages with a rotary drive, so that the linear movement between the two outer end positions of the piston surfaces is converted into a rotary movement for wiper actuation via the rotary drive.
- a so-called reversing slide is used for reversing, i.e. reversing the rotary movement as soon as one of the end positions is reached.
- This is a valve in which the valve spool is also operated in a double-acting manner analogous to the double-acting working cylinder. In relation to the movement of the double-acting working cylinder, the reversing slide executes movements in the opposite direction.
- a pneumatically controlled seat for a vehicle is known from US Pat. No. 4,655,505, which makes it possible to vary the pressure distribution of the seat for the driver.
- This device comprises a plurality of flexible air chambers integrated in the seat of the vehicle, which are connected to an air pump and a pressure sensor via a corresponding number of connecting means. Each connecting means comprises a valve, the electronic about ' "control means, which evaluate the signal of the pressure sensor can be driven.
- the combined, pneumatic and electrical circuitry of this device allows, due to the large number of valves, to build up defined pressures in the individual air chambers of the seat, thus increasing both the comfort of the seat and taking account of longitudinal or lateral accelerations of the vehicle.
- the device of US Pat. No. 4,655,505 allows the pressure in each individual air chamber to be varied continuously over time, so that an optimized pressure distribution can be set or the driver experiences a massage effect through an oscillating change in the pressure conditions in the air chambers.
- the device according to the invention with the features of claim 1 and also the method according to the invention according to claim 17 has the advantage that electrical or electronic components can be almost completely dispensed with.
- the pneumatic circuit according to the invention for regulating the pressure medium flows requires no electrically controlled valves, no pressure sensors and also no computer-controlled control device. Only a compressor or the pump for providing the pressure medium can possibly be designed as an electrically driven pump.
- a slide element is moved such that an output channel of the pneumatic device is alternately connected to one input channel and the other output channel is simultaneously connected to the venting channel of the device.
- the respective connection between the one input channel, the respective output channel and the second output channel and the ventilation channel can be established in a simple and elegant manner.
- the slide element thus acts as an adjustable switch which takes on the assignment of the four channels of the device to one another.
- Time constant of the alternating movement can be set flexibly. Only when there is a pre-defined pressure in the work area is a sufficiently large restoring force exerted on the valve piston and the associated slide element. The slide element is then moved automatically, so that the alternative
- the work area of the device according to the invention assigned to the two output channels is part of the valve chamber in which the valve piston moves.
- the working spaces are closed off from the valve chamber, for example via a membrane, which is connected to the valve piston in the vicinity of one of its ends.
- These elastic membranes which can advantageously consist of an elastomer, such as rubber or silicone, simply transmit the pressure present in the working chamber to the valve piston.
- the valve piston can thus be set into an oscillating movement by the relative pressure difference between the working chambers, which drives the slide element controlling the pressure medium accordingly.
- the valve piston is not freely movable in the valve chamber, but is secured by a counter device.
- This counter device counteracts the force generated by the pressure difference in the working chambers on the valve piston.
- the counter device which can be implemented, for example, in the form of a detent spring, thus also allows the internal time constant of the pneumatic device according to the invention Set the control and regulating device in the desired manner.
- the force which the counter device exerts on the valve piston can be set manually or optionally also automatically, so that the time constant of the oscillating movement of the valve piston can be changed in a simple manner, for example by the driver himself.
- a cost-effective and lightweight design of the device according to the invention results if it is partially or completely made of plastic.
- other materials are also possible for the claimed control and regulating device without sacrificing its functionality.
- control and regulating device is advantageously used when a small compressor for the pressure medium, such as a vane cell compressor or a diaphragm pump, is connected to one input channel and the two output channels are each connected to a flexible air chamber.
- the control and regulating device according to the invention ensures that one of the air chambers is alternately inflated and the other air chamber is vented at the same time, so that there is an alternating movement of the air chambers if the device according to the invention is only subjected to a constant pressure medium flow.
- the time constant of this mutual movement is determined solely by the passive means of the device according to the invention and can be varied in a simple and advantageous manner by means of various chokes and counter elements and adapted to the respective requirements. If the device according to the invention includes a pump delivering the pressure medium and the output side
- Air chambers built into the seat of a vehicle this allows, for example, an advantageous massage effect for the occupants of the vehicle to be achieved without the need for complex electronic circuitry, as in the case of the
- the method according to the invention allows the control and regulation of pressure medium flows in a simple and advantageous manner solely with pneumatic means.
- the claimed method enables the simple implementation of the adjustable time constant and adapted delays for the alternating movements solely by means of a pneumatic regulation of the pressure medium flows.
- FIG. 1 shows a schematic illustration of a first exemplary embodiment of a circuit of the inventive pneumatic device for a first end position of the slide elements of the device
- FIG. 2 shows a schematic illustration of the first exemplary embodiment of a circuit of the pneumatic device according to the invention for a second end position of the slide elements of the device
- FIG. 3 shows a schematic illustration of a second exemplary embodiment of a circuit of the pneumatic device according to the invention for the first end position of the slide elements of the device
- Figure 4 shows a section through part of an embodiment of the device according to the invention in a first end position of the slide element
- Figure 5 is a plan view of an embodiment of a channel plate and slider element arranged below the device according to the invention.
- the schematic circuit of the pneumatic device 10 according to the invention shown in FIG. 1 shows a slide element 12 which connects an input channel 14 of the device to a first output channel 16 and a second output channel 18 to a ventilation channel 20.
- the ventilation channel 20 does not necessarily have to be at atmospheric pressure. Rather, a closed circuit for the device is also conceivable.
- An adjustable throttle 15 is connected upstream of the input channel 14.
- the output channel 16 is connected to a recipient 24 via connecting means 22.
- the connecting means 22 has, among other things, a metering egg 26 with which the flow through the connecting means 22 is in the desired manner Way can be set.
- a further connecting means 28 branches off from the output channel 16, which leads via a delay element 29, which in the present exemplary embodiment is implemented by a throttle 30, to a reservoir 34 serving as the first working space 32, which is emptied via a check valve 35 and the connecting means 28 can.
- the reservoir 32 is in turn coupled to the slide element 12 via a device 37 in terms of printing technology.
- the second output channel 18 is connected, on the one hand, to a second recipient 42 via connecting means 38 and a throttle 40 and, on the other hand, is coupled to a reservoir 50 serving as a second working space 48 via connecting means 44 and a throttle 46.
- the supply line to the reservoir 50 also has a delay element 31 and a check valve 47 for venting.
- the reservoir 50 like the reservoir 34, is coupled to the slide element 12 on the opposite side via a device 39.
- the slide element 12 has continuous channels 52 in its interior, which mediate the respective connection between the one input channel 14, the two output channels 16 and 18 and the ventilation channel 20 depending on the position of the slide element 12.
- the mobility of the slide element 12 is regulated by a counter device 54, which is shown schematically in FIG. 1 as an elastic spring 64.
- the input channel 14 of the device 10 according to the invention is pressurized with a pressure medium, such as air, for example the pressure medium passes through a channel 56 and the throttle 26 into the recipient 24, which is shaped, for example, as an elastic air cushion 58.
- the air cushion 58 will fill with the pressure medium and will be inflated accordingly.
- the recipient 42 is connected via a channel 60 to the ventilation channel 20 of the device, so that, for example, atmospheric pressure prevails therein.
- the air cushion 58 While the air cushion 58 is being inflated, part of the pressure medium flow is supplied to the working space 32 via the connecting means 28 and a correspondingly set throttle 30.
- the exact setting of the throttle 30 determines the time it takes to fill the working space 32.
- the working space 32 is connected to the slide element 12, for example, via an elastic membrane 62.
- the counter device 54 which is indicated in the form of two elastic springs 64 in FIG. 1. If the force exerted on the slide element 12 by the pressure in the working space 32 exceeds the latching force of the slide element 12, the latter is displaced and assumes a position as shown in FIG. 2.
- the recipient 24 is now connected to the venting channel 20 via a channel 66 in the slide learning t 12, so that the pressure built up in the recipient 24 can escape and the air cushion 58 is thus emptied again.
- the associated work space 32 is also emptied via the valve 35, the connecting means 28 and the channel 66 in the slide element 12.
- the recipient 42 which can be a flexible air cushion 68, is in turn connected to the one input channel 14 via a channel 70 and is filled by the pressure medium present there. At the same time, a Part of this pressure medium is supplied to the second working space 48 via the connecting means 44 and the throttle 46.
- the pressure in the second work space now rises in accordance with the setting of the throttle 46 while the recipient 42 is being pumped up, as has already been described above in an analogous manner for the first work space.
- a force is thus exerted on the slide element 12 via the device 37, which can also be a membrane 72, for example. If this force is sufficiently large to overcome the latching force of the slide element 12 due to the counter device 54, that is to say that a sufficiently high pressure has built up in the working space 48, the slide element 12 is pushed back into its first position - shown in FIG. 1 - so that the associated air cushion 68 •• ' in turn via the channel 60 of the slide element 12 ' • -. is vented.
- a system based on this invention in the seat of a vehicle can improve the seating comfort and relieve the spine through the resulting massage effect.
- the oscillation period of this movement can be set via the setting of the relative throttle sizes, the size of the volumes involved and, not least, also via the delivered pressure medium flow.
- a small compressor such as a vane pump or a diaphragm pump, can be used for the pneumatic supply of the device.
- the device is shown in FIG. 3.
- the pump 78 driven by a motor 76, which is preferably used in the form of an electric motor, acts on the device 10 according to the invention via the adjustable throttle 15 and the inlet channel 14 with the pressure medium, which is preferably air, but can also be a different mixture or gas can.
- FIG. 3 Exemplary embodiment of the device according to the invention is shown in FIG. 3, monitor a volume 82 which is connected upstream of the input channel 14.
- the motor 76 driving the pump 78 is controlled via a pressure sensor 84 in the feed line 86 and an associated switch.
- the pump 78 and the associated motor 76 driving it can be arranged in the immediate vicinity of the pneumatic device 10 or can also be spatially separated by means of corresponding connecting means and thus optionally acoustically decoupled from the vehicle seat.
- Figure 4 shows a cross section through an embodiment of the pneumatic device according to the invention.
- the pressure medium passes through the inlet channel 14 and a channel plate 88 to the slide element 12.
- the slide element 12 is firmly connected to a valve piston 90.
- the valve piston 90 in turn is arranged in a valve chamber 92.
- the slide element 12 can be displaced below, that is to say on the side of the channel plate 88 facing away from the input channel or the output channels, so that different openings in the channel plate 88 can optionally coincide with the channels 52 of the slide element 12. This is shown in FIG. 5 in a top view of the channel plate 88.
- the movable slide element 12 is shown under the channel plate 88.
- the pressure present at the inlet channel 14 is permanently connected to the valve camera 92.
- the working space 48 is permanently connected to the outlet channel 18 and the working chamber 33 is permanently connected to the outlet channel 16.
- the pressure in the working space 32 is vented and increased in the working space 48. This continues until the pressure difference between the two working spaces 48 and 32 is large enough to overcome the adjustable latching force of the counter device 54, which in the exemplary embodiment in FIG. 4 is realized by a prestressed latching spring in the form of a snap ball 94.
- the counter device 54 can also be implemented, for example, by means of a leaf spring or other counter devices familiar to the person skilled in the art.
- the system pressure of the counter device can be varied via an adjusting mechanism 96.
- the differential pressure of the working spaces 48 and 32 causes a resultant force on the flexible membranes 62 and 72, so that the valve piston 90 connected to the membranes is moved against the force of the detent spring 94 and the slide element 12 is moved into the second end position of the device 10.
- the device according to the invention is not limited to use for the mutual ventilation of air cushions in vehicle seats.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Massaging Devices (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/333,495 US6988508B2 (en) | 2001-05-18 | 2002-05-06 | Device and method for the pneumatic control, and regulation of hydraulic fluid flows |
JP2002591677A JP2004519640A (ja) | 2001-05-18 | 2002-05-06 | 圧力媒体流を空気力式に制御しかつ調節する装置及び方法 |
KR10-2003-7000654A KR20030017635A (ko) | 2001-05-18 | 2002-05-06 | 압력 매체 유동의 압축 공기식 제어 및 조절을 위한 장치및 방법 |
DE50204187T DE50204187D1 (de) | 2001-05-18 | 2002-05-06 | Vorrichtung und verfahren zur pneumatischen steuerung und regelung von druckmittelströmen |
EP02740329A EP1404977B1 (de) | 2001-05-18 | 2002-05-06 | Vorrichtung und verfahren zur pneumatischen steuerung und regelung von druckmittelströmen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001124334 DE10124334A1 (de) | 2001-05-18 | 2001-05-18 | Vorrichtung und Verfahren zur pneumatischen Steuerung und Regelung von Druckmittelströmen |
DE10124334.0 | 2001-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002095241A1 true WO2002095241A1 (de) | 2002-11-28 |
Family
ID=7685332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/001682 WO2002095241A1 (de) | 2001-05-18 | 2002-05-06 | Vorrichtung und verfahren zur pneumatischen steuerung und regelung von druckmittelströmen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6988508B2 (de) |
EP (1) | EP1404977B1 (de) |
JP (1) | JP2004519640A (de) |
KR (1) | KR20030017635A (de) |
DE (2) | DE10124334A1 (de) |
WO (1) | WO2002095241A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7658598B2 (en) * | 2005-10-24 | 2010-02-09 | Proportionair, Incorporated | Method and control system for a pump |
US8292600B2 (en) * | 2004-11-17 | 2012-10-23 | Proportion-Air, Incorporated | Control system for an air operated diaphragm pump |
US7517199B2 (en) * | 2004-11-17 | 2009-04-14 | Proportion Air Incorporated | Control system for an air operated diaphragm pump |
EP2361800B1 (de) * | 2010-02-17 | 2013-04-24 | L & P Swiss Holding AG | Einstellvorrichtung für einen Sitz und Verfahren zur Bedienung der Einstellvorrichtung |
US20120315163A1 (en) * | 2011-06-13 | 2012-12-13 | Mi Yan | Air-driven hydraulic pump with pressure control |
US20130062920A1 (en) * | 2011-09-14 | 2013-03-14 | Ron McDiarmid | Chair with inflatable bladder system |
EP2711561B1 (de) * | 2012-09-21 | 2019-08-28 | Danfoss Power Solutions Aps | Anordnung mit einem elektrohydraulischen Regelventil |
CN104500476B (zh) * | 2014-12-15 | 2017-04-19 | 中煤北京煤矿机械有限责任公司 | 交替单向阀及增压系统 |
US10035272B2 (en) * | 2016-02-11 | 2018-07-31 | Hogue Tool & Machine, Inc. | Folding knife |
FI128135B (fi) * | 2017-10-20 | 2019-10-31 | Pneumaxpert Oy | Oskillointisylinterijärjestely |
DE102020104615A1 (de) * | 2020-02-21 | 2021-08-26 | Faurecia Autositze Gmbh | Ventilvorrichtung und damit ausgestattetes Ventilsystem sowie dieses enthaltene Steuereinrichtung zur Fluidstromsteuerung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3167083A (en) * | 1961-09-05 | 1965-01-26 | Peninsular Distributing Compan | Sequence valve |
GB984624A (en) * | 1961-03-30 | 1965-03-03 | Dorotheus Donkervoort | Pneumatic or hydraulic fluid flow control apparatus |
DE1936506A1 (de) * | 1969-07-17 | 1971-02-25 | Dba Sa | Steuerventileinheit |
US3949646A (en) * | 1974-07-26 | 1976-04-13 | Philip Morris Incorporated | Control device for air cylinder unit |
US4172698A (en) * | 1977-06-14 | 1979-10-30 | Dragerwerk Aktiengesellschaft | Pressure gas operated pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2864342A (en) * | 1955-08-29 | 1958-12-16 | Lynn J Ziegelmeyer | Hydraulically operated motor and control means therefor |
US4655505A (en) * | 1984-12-13 | 1987-04-07 | Nhk Spring Co., Ltd. | Pneumatically controlled seat for vehicle |
US5529377A (en) * | 1993-06-25 | 1996-06-25 | Mccord Winn Texton | Air cell module for automotive seat |
DE19625131C2 (de) | 1996-06-11 | 1998-04-16 | Mannesmann Ag | Druckmittelbetriebener Scheibenwischermotor |
US5771514A (en) * | 1996-07-08 | 1998-06-30 | Chris Wilhoit | Adjustable contour pillow |
-
2001
- 2001-05-18 DE DE2001124334 patent/DE10124334A1/de not_active Withdrawn
-
2002
- 2002-05-06 DE DE50204187T patent/DE50204187D1/de not_active Expired - Lifetime
- 2002-05-06 JP JP2002591677A patent/JP2004519640A/ja active Pending
- 2002-05-06 US US10/333,495 patent/US6988508B2/en not_active Expired - Fee Related
- 2002-05-06 WO PCT/DE2002/001682 patent/WO2002095241A1/de active IP Right Grant
- 2002-05-06 KR KR10-2003-7000654A patent/KR20030017635A/ko not_active Application Discontinuation
- 2002-05-06 EP EP02740329A patent/EP1404977B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB984624A (en) * | 1961-03-30 | 1965-03-03 | Dorotheus Donkervoort | Pneumatic or hydraulic fluid flow control apparatus |
US3167083A (en) * | 1961-09-05 | 1965-01-26 | Peninsular Distributing Compan | Sequence valve |
DE1936506A1 (de) * | 1969-07-17 | 1971-02-25 | Dba Sa | Steuerventileinheit |
US3949646A (en) * | 1974-07-26 | 1976-04-13 | Philip Morris Incorporated | Control device for air cylinder unit |
US4172698A (en) * | 1977-06-14 | 1979-10-30 | Dragerwerk Aktiengesellschaft | Pressure gas operated pump |
Also Published As
Publication number | Publication date |
---|---|
DE50204187D1 (de) | 2005-10-13 |
JP2004519640A (ja) | 2004-07-02 |
DE10124334A1 (de) | 2002-11-21 |
EP1404977B1 (de) | 2005-09-07 |
US6988508B2 (en) | 2006-01-24 |
US20040020531A1 (en) | 2004-02-05 |
EP1404977A1 (de) | 2004-04-07 |
KR20030017635A (ko) | 2003-03-03 |
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