EP1443219A1 - Méthode et dispositif pour tester un actionneur pneumatique - Google Patents
Méthode et dispositif pour tester un actionneur pneumatique Download PDFInfo
- Publication number
- EP1443219A1 EP1443219A1 EP04000282A EP04000282A EP1443219A1 EP 1443219 A1 EP1443219 A1 EP 1443219A1 EP 04000282 A EP04000282 A EP 04000282A EP 04000282 A EP04000282 A EP 04000282A EP 1443219 A1 EP1443219 A1 EP 1443219A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- piston
- characteristic
- working space
- actuator
- 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.)
- Granted
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
- F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
- F15B15/065—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the rack-and-pinion type
-
- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
Definitions
- the invention relates to a diagnostic method for a pneumatic actuator at least one piston which is movable in a housing between two end positions and delimits a first work space, the work space having a pressure supply system is connectable, which is under a system pressure, and at least one position of the piston in the housing is recognized.
- the invention also relates to a diagnostic device for a pneumatic actuator with at least one piston, which in a housing is movable between two end positions and delimits a first working space, which can be connected to a pressure supply system which is under a system pressure stands, with at least one position of the piston in the housing by means of the diagnostic device can be represented.
- Diagnostic methods and devices of this type use, for example, a pneumatic one Actuator with a piston that moves in a housing between two end positions is and delimits a first work space with a pressure supply system is connectable, which is under a system pressure and with a position transmitter, by means of whose at least one position of the piston can be seen in the housing.
- Such pneumatic actuators belong to the order of the pressure medium gear and transmit a movement from the surface using a medium that can only be subjected to pressure Drive for output.
- a gas especially air acts as a medium under pressure designed as a piston drive member and moves it in a cylindrical Housing in the axial direction or it rotates - in the case of a rotary leaf drive - around a rigid one Axis .
- the output member is, for example, a rotatable shaft, with each axial displacement of the piston in the housing immediately causes rotation of the output shaft.
- the first working area is depressurized before the start of a switching operation - that is, the movement of the piston from one end position to the other. If the first working space is connected to the pressure supply system, the pressure in the first working space initially rises continuously without the piston being set in motion. Only when the pressure force acting on the piston from the pressure medium exceeds the static friction forces opposing the movement, is the piston accelerated in the direction of the other end position. Starting from this " breakaway point", only small amounts of sliding friction forces counteract the compressive force.
- the diagnostic method according to the invention is not only applicable to actuators that can be coupled with an element to be actuated (e.g. fitting) in the form of a separate component are, but also in such actuators that with the element to be actuated form a structural unit and as disclosed for example in WO 00/04311.
- a course of the characteristic pressure is preferred in the context of a diagnosis according to the invention between two operating points of the actuator with a course of the setpoint compared.
- the pressure profiles from Start of loading up to the breakaway point, from the breakaway point to the stop in the other end position and from this point in time until the system pressure is reached flow into the diagnosis and, if necessary, with the movement profile of the piston be correlated between the end positions. Any deviation from that in question Setpoint can, for example, trigger an immediate visual inspection in progress Operation, as a reservation for the exchange in the next scheduled shutdown or prophylactically for automatic switchover to a redundant system path be used.
- the difference between the characteristic pressure and a reference pressure is preferably measured with compared to the nominal value, the reference pressure being the static pressure component of the in one second working space is present and the second working space is not included is connected to the pressure supply system.
- the reference pressure being the static pressure component of the in one second working space is present and the second working space is not included is connected to the pressure supply system.
- the difference between the respective identification and reference pressures in the work rooms can be used for both directions of operation with minimal construction effort
- Differential pressure measuring element can be determined.
- Such measuring elements are general known and for a variety of uses and sizes as inexpensive Mass product available on the market.
- the miniaturization of this measuring element allows - with the appropriate dimensions of the component in question - its integration into the housing or even in the piston of the actuator according to the invention.
- the characteristic pressure can be compared with a constant pressure.
- Generally measuring elements are known, for example, which have an absolute pressure (against a vacuum) determine.
- the differential pressure measuring element already mentioned can also be used in this sense be used if the connection for the reference pressure, for example with the external environment of the actuator is connected. Integration is also an option here of the measuring element in the piston.
- a diagnostic method preferably determines for a switching operation a pressure reserve, the pressure reserve being the difference between a maximum value the pressure before the piston breaks loose and the system pressure.
- This pressure reserve corresponds indirectly - via the pressurized piston surface in a cylindrical Housing of a linear actuator - a power reserve or - via the pressurized piston surface and the effective lever arm in a rotary actuator - a torque reserve as a measure of the load that can generally be set from the rest position: If the static friction of the load exceeds the force or torque reserve of the actuator, then the adjustment process is blocked. It is particularly preferred if the value falls below a minimum Limit pressure reserve generates a warning signal.
- a control pressure is determined for a control process, the control pressure being the value of the Pressure when reaching a final position of the piston.
- the characteristic pressure defined in this way corresponds to the pressure required to complete the setting process - for example, to completely opening or closing a valve - is required.
- An increase in Characteristic pressure can, on the one hand, lead to wear on the sealing and sliding surfaces of the actuator or the posed element and a resulting increase in Point out sliding friction forces.
- deposits also act on the actuator or on the element that hinder the reaching of the end position - for example In a fluid power plant, a solid load deposited at the valve seat of the fluid - in an increase in the characteristic pressure. Again, it’s especially helpful if a warning signal is generated when a maximum limit signal pressure is exceeded.
- a warning signal in the context of such a diagnostic method according to the invention can for example in the form of simple - and generally known - optical or acoustic Signal elements are output, which are arranged directly on the actuator.
- a warning signal can - alternatively or additionally - take the form of an electrical one or have an electromagnetic signal that is arranged on the actuator Diagnostic device on a further away display element, for example on a central scoreboard or transmitted to a control computer for a larger system becomes.
- a diagnostic device preferably has a digital computing unit in which the comparison of the characteristic pressure with the setpoint is carried out.
- suitable Electronic computing units are generally known and in different designs Cost-effectively available on the market as mass products. The use is also fundamental analog pneumatic comparators possible. Aside from special cases, This excludes the use of electronic components, for example but not preferred for cost reasons.
- the use of programmable electronic On the one hand, computing units enable the use of standard components available on the market, on the other hand, the diagnostic device according to the invention can be so special cheap - namely by reprogramming instead of replacing components - for other purposes are used.
- As a diagnostic device in the sense of the invention in particular also to look at a commercially available digital computer for use is programmed in the manner mentioned.
- An actuator according to the invention preferably has a reference measuring connection on which by means of a reference pressure measuring element a reference pressure is measurable, the reference pressure being the static pressure component of a pressure present at a second work space and wherein the second work space is decoupled from the pressure supply system.
- An actuator according to the invention can have an integrated diagnostic device such as that described above.
- the Actuator according to the invention then with the same dimensions as for the respective requirements commercially available actuators manufactured and therefore used in exchange for them become.
- Figure 1 shows a pneumatic actuator 1 according to the invention with rack and pinion principle and a closed cylindrical housing 2, two axially mounted in this and self-centering, counter-rotating piston 3 and a radial rotating output shaft 4 emerging from the housing 2.
- the rotation of the output shaft 4 is by two racks 5 connected to the pistons 3, which are axially in the housing 2 are arranged and in a, not shown, on the circumference of the output shaft 4th engage arranged teeth, firmly coupled to the axial movement of the piston 3.
- the two pistons 3 enclose the inner working space 6 in the housing 2, in which also the racks 5 and the output shaft 4 extend. With the housing 2 the pistons 3 enclose the outer working spaces 7. In the outer work rooms 7 compression springs 8 are arranged, the pistons 3 on top of one another in unpressurized working spaces 6, 7 to push.
- the housing 2, the pistons 3 and the racks 5 are made of an aluminum alloy manufactured in the die casting process.
- the outer surfaces are anodized and additional coated with epoxy resin.
- the output shaft 4 is made of stainless steel and is for connection on the element to be provided with a 2-flat, not shown.
- the Working spaces 6, 7 are on the piston 3 with nitrile rubber seals, not shown sealed against each other.
- the actuator 1 according to the invention shown has a nominal swivel angle of 120 ° on.
- the actuator 1 brings the element to be set at a system pressure 9 a torque of up to 8000 Nm from 10 bar. Filtered is used as the working medium Air (PNEUROP / ISO class 4).
- the actuator 1 has two pressure connections 10, 11, which are by means of a switching element 12 can be alternately pressurized or vented with the working medium.
- the inner working space 6 is connected via the first pressure connection 10, and via the second Pressure connection 11, the outer working spaces 7 are acted upon.
- the illustrated Position is the inner working space 6 via the first pressure connection 10 with the working medium pressurized, the outer working spaces 7 are via the second pressure connection 11 connected to the environment and have ambient pressure.
- the compression springs 8 lie on a block and thus define the end position of the pistons 3.
- the pistons 3 are at the start of the setting process in the basic position (or “ 0 ° position”) 13 of the actuator 1 according to the invention, at the end of the setting process in the other end position, here the “ 120 ° position "14.
- the outer working spaces 7 are acted upon by the working medium and the inner working space 6 is vented.
- the static pressure component of the pressure present in the outer work spaces 7 is present as the characteristic pressure at the pressure measurement connection 15, and the static pressure component of the pressure present in the inner work space 6 is present as the reference pressure at the reference pressure measurement connection 16.
- the functions of the pressure and reference pressure measurement connection 16 are interchanged, but the method of operation of the diagnosis described below is identical.
- FIG. 2 shows the course of the differential pressure 19 and the path 23 on this invention Actuator 1 during the actuating process:
- the differential pressure corresponds 19 in terms of the amount of the system pressure 8.
- the differential pressure is 19 defined negatively.
- the amount of differential pressure 19 drops to 0 (same pressures on both sides of the piston 3) and then rises to one below the system pressure 8 lying maximum pressure 24.
- the pressure reserve 25 the difference between that Maximum pressure 24 and the system pressure 8 is referred to as the pressure reserve 25.
- the pistons 3 now move towards each other at a substantially constant speed.
- the differential pressure 19 drops to a lower, also essentially constant amount.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Fluid-Damping Devices (AREA)
- Measuring Fluid Pressure (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Actuator (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10303889 | 2003-01-30 | ||
| DE10303889A DE10303889B3 (de) | 2003-01-30 | 2003-01-30 | Diagnoseverfahren und -vorrichtung für einen pneumatischen Stellantrieb |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1443219A1 true EP1443219A1 (fr) | 2004-08-04 |
| EP1443219B1 EP1443219B1 (fr) | 2006-08-23 |
Family
ID=31984479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04000282A Expired - Lifetime EP1443219B1 (fr) | 2003-01-30 | 2004-01-09 | Méthode et dispositif pour tester un actionneur pneumatique |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1443219B1 (fr) |
| AT (1) | ATE337493T1 (fr) |
| DE (2) | DE10303889B3 (fr) |
| DK (1) | DK1443219T3 (fr) |
| ES (1) | ES2270181T3 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG151219A1 (en) * | 2007-09-25 | 2009-04-30 | Faac Spa | Actuating device with sensor for controlling movement of gates |
| CN103471836A (zh) * | 2013-09-22 | 2013-12-25 | 浙江博恩自控阀门有限公司 | 一种模拟扭矩的疲劳强度测试装置 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008033047A1 (de) | 2008-07-14 | 2010-02-25 | Abb Technology Ag | Meldung der aktiven Sicherheitsstellung bei elektropneumatischen Stellungsreglern |
| DE102010015647B4 (de) * | 2010-04-20 | 2011-12-29 | Samson Aktiengesellschaft | Verfahren zum Bestimmen einer Betriebsposition eines Auf/Zu-Ventils und Feldgerät |
| DE102010024723B4 (de) | 2010-06-23 | 2014-02-13 | Samson Aktiengesellschaft | Pneumatischer Stellantrieb und Verfahren zum Betreiben des pneumatischen Stellantriebs |
| DE102011050941A1 (de) * | 2011-06-09 | 2012-12-13 | Bar-Pneumatische Steuerungssysteme Gmbh | Verfahren zum Betrieb eines pneumatischen Antriebs |
| US9128008B2 (en) | 2012-04-20 | 2015-09-08 | Kent Tabor | Actuator predictive system |
| CN104316318B (zh) * | 2014-10-10 | 2019-11-12 | 无锡纬途流体科技有限公司 | 回转式阀门气动执行器的测试装置及测试方法 |
| CN106609883A (zh) * | 2015-10-26 | 2017-05-03 | 安徽华尔泰化工股份有限公司 | 一种造气炉液压阀检测头固定支架 |
| DE102018205311A1 (de) * | 2018-04-09 | 2019-10-10 | Festo Ag & Co. Kg | Diagnoseeinrichtung, System und Verfahren |
| DE102023102181A1 (de) | 2023-01-30 | 2024-08-01 | Ifm Electronic Gmbh | Verfahren und Vorrichtung zur Leckageüberwachung für pneumatisch betrieben Schwenkantriebe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5109692A (en) * | 1988-08-25 | 1992-05-05 | Fisher Controls International Inc. | Diagnostic apparatus and method for fluid control valves |
| US5251148A (en) * | 1990-06-01 | 1993-10-05 | Valtek, Inc. | Integrated process control valve |
| DE4218320A1 (de) * | 1992-06-03 | 1993-12-09 | Siemens Ag | Verfahren und Einrichtung zur Prüfung einer durch ein Medium angetriebenen Armatur |
| EP0947901A2 (fr) * | 1998-04-03 | 1999-10-06 | General Electric Company | Système de surveillance pour la maintenance des vannes d'une turbine à vapeur |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE463684B (sv) * | 1989-12-22 | 1991-01-07 | Mecman Ab | Haallaranordning foer kolvlaegesavkaennare |
| SE465684B (sv) * | 1990-06-20 | 1991-10-14 | Mecman Ab | Haallaranordning foer kolvlaegesavkaennare med klaemanordning |
| DE4241189A1 (de) * | 1992-12-03 | 1994-06-09 | Mannesmann Ag | Einrichtung zur Positionsermittlung bei einem druckmittelbetriebenen Arbeitszylinder |
| JPH1151011A (ja) * | 1997-07-30 | 1999-02-23 | Smc Corp | 流体圧シリンダにおける位置検出センサ取付具 |
| AU4657299A (en) * | 1998-07-16 | 2000-02-07 | Se Woo Conval Co., Ltd. | Valve system for fluid pipes |
| DE10026082C1 (de) * | 2000-05-24 | 2001-11-08 | Rexroth Mecman Gmbh | Vorrichtung zur Befestigung eines Sensors an einem Druckmittelzylinder |
| DE10152178C2 (de) * | 2001-04-30 | 2003-04-17 | Rexroth Mecman Gmbh | Druckmittelzylinder mit einem verschiebbaren Sensor zur Detektion der Kolbenstellung |
-
2003
- 2003-01-30 DE DE10303889A patent/DE10303889B3/de not_active Expired - Fee Related
-
2004
- 2004-01-09 AT AT04000282T patent/ATE337493T1/de active
- 2004-01-09 EP EP04000282A patent/EP1443219B1/fr not_active Expired - Lifetime
- 2004-01-09 DK DK04000282T patent/DK1443219T3/da active
- 2004-01-09 ES ES04000282T patent/ES2270181T3/es not_active Expired - Lifetime
- 2004-01-09 DE DE502004001222T patent/DE502004001222D1/de not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5109692A (en) * | 1988-08-25 | 1992-05-05 | Fisher Controls International Inc. | Diagnostic apparatus and method for fluid control valves |
| US5251148A (en) * | 1990-06-01 | 1993-10-05 | Valtek, Inc. | Integrated process control valve |
| DE4218320A1 (de) * | 1992-06-03 | 1993-12-09 | Siemens Ag | Verfahren und Einrichtung zur Prüfung einer durch ein Medium angetriebenen Armatur |
| EP0947901A2 (fr) * | 1998-04-03 | 1999-10-06 | General Electric Company | Système de surveillance pour la maintenance des vannes d'une turbine à vapeur |
Non-Patent Citations (1)
| Title |
|---|
| MUNDRY S ET AL: "CONDITION MONITORING FUER DIE FLUIDTECHNIK", OLHYDRAULIK UND PNEUMATIK, KRAUSSKOPF VERLAG FUR WIRTSCHAFT GMBH. MAINZ, DE, vol. 46, no. 2, February 2002 (2002-02-01), pages 120 - 127, XP001114850, ISSN: 0341-2660 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG151219A1 (en) * | 2007-09-25 | 2009-04-30 | Faac Spa | Actuating device with sensor for controlling movement of gates |
| CN101397874B (zh) * | 2007-09-25 | 2013-02-27 | Faac股份公司 | 用于控制门运动的具有传感器的致动装置 |
| CN103471836A (zh) * | 2013-09-22 | 2013-12-25 | 浙江博恩自控阀门有限公司 | 一种模拟扭矩的疲劳强度测试装置 |
| CN103471836B (zh) * | 2013-09-22 | 2016-04-06 | 浙江博恩自控阀门有限公司 | 一种模拟扭矩的疲劳强度测试装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10303889B3 (de) | 2004-04-08 |
| ES2270181T3 (es) | 2007-04-01 |
| DK1443219T3 (da) | 2006-12-27 |
| ATE337493T1 (de) | 2006-09-15 |
| DE502004001222D1 (de) | 2006-10-05 |
| EP1443219B1 (fr) | 2006-08-23 |
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