WO2008007969A1 - Actuator device - Google Patents
Actuator device Download PDFInfo
- Publication number
- WO2008007969A1 WO2008007969A1 PCT/NO2007/000246 NO2007000246W WO2008007969A1 WO 2008007969 A1 WO2008007969 A1 WO 2008007969A1 NO 2007000246 W NO2007000246 W NO 2007000246W WO 2008007969 A1 WO2008007969 A1 WO 2008007969A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- actuator
- shaft
- nut
- housing
- gearbox
- Prior art date
Links
- 230000000295 complement effect Effects 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
- F16K31/043—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
Definitions
- This invention relates to an actuator. More specifically it concerns an actuator comprising an actuator housing including a fitting for connecting the actuator to an object, and a motor which via transmission elements drives an output actuator shaft of the actuator , wherein the actuator shaft is rotationally disconnectable from the motor.
- the actuator shaft is rotatable between two angular positions whereof one angular position may correspond to the object being in a first condition and the other angular position may correspond to the object being in a second condition.
- the actuator is provided with an element, typically a spring, for mechanically storage of energy, the element, by energy cutoff to the actuator, being releasably arranged to be able to displace a nut being prevented from rotation around its longitudinal axis along a screw thread complementary fitting to the nut and connected to the actuator shaft, whereby the actuator shaft is rotated between the two angular positions.
- an element typically a spring
- Electric actuators have among other things, due to their simple connection, seen a considerably increased use. Electrical actuators have, however, according to prior art, a weakness in that they have difficulties in closing a valve in case the electric supply to the actuator fails.
- Some actuators are provided with auxiliary equipment for manually rotating or displacing the actuator output shaft to a position wherein the valve is closed.
- auxiliary equipment is of no avail if the actuator is situated in a position where access is difficult, such as submerged.
- the object of the invention is to obviate or mitigate at least one of the prior art drawbacks.
- An actuator in accordance with the invention comprises an actuator housing with a fitting for connecting the actuator to an object, and a motor, which via a transmission element drives an output actuator shaft of the actuator.
- the actuator shaft is rotationally disconnectable from the motor, the actuator shaft being rotatable between two angular positions .
- the one angular position may correspond to the object being in a first condition, for example an open condition in case the object is a valve, and the other angular position may correspond to the object being in a second condition, for
- the actuator of the invention is characterized in that it is provided with, an element for mechanically storing of energy, typically a spring, wherein the element by energy cut-off to the actuator is releasably arranged to be able to displace a nut being prevented from rotation around its longitudinal axis along a screw thread being complementary to the nut and connected to the actuator shaft, whereby the actuator shaft is rotated between the two angular positions.
- an element for mechanically storing of energy typically a spring
- the element by energy cut-off to the actuator is releasably arranged to be able to displace a nut being prevented from rotation around its longitudinal axis along a screw thread being complementary to the nut and connected to the actuator shaft, whereby the actuator shaft is rotated between the two angular positions.
- the actuator is able to for example to close a valve in case of failure in the electrical supply to the actuator.
- the element may be supplied with renewed energy by rotating the screw thread in the reverse direction by means of the motor.
- the nut has an abutting face towards the spring holder complementary fitting a shoulder in the spring holder.
- the element for storing mechanical energy is normally constituted by at least one spring clamped between the actuator housing and a spring holder being displaceable relative to the actuator housing.
- the spring holder is releasably connected relative to the actuator housing by means of a first releasable connector.
- the gearbox housing is connected to the actuator housing via a second releasable connector.
- the invention provides. an actuator with a rotatable actuator shaft provided with a so-called failsafe function, i.e. that the actuator, in case of energy failure, can move such as a valve to a safe condition.
- Fig. 1 shows, in section, a principal sketch of an actuator in accordance with the invention where the actuator components are in an initial position
- Fig. 2 shows the same as fig. 1, but the actuator shaft is here under readjustment following an electric supply failure;
- Fig. 3 shows the actuator of fig. 1 when the actuator spring is biased to its initial condition.
- the reference number 1 denotes an actuator comprising a cylindrical actuator housing 2 with a fitting 4 in its one end portion.
- the fitting 4 fits complementary to a valve housing 8 of a valve 6.
- the actuator 1 is provided with an element 14 in the form of compression springs for storage of mechanical energy.
- the compression springs 14 are biased between an end portion 16 of the actuator housing 2 relative to the fitting 4, and, relative to the spring housing 2, a concentrically and axially displaceable spring holder 18.
- the number of compression springs 14 is chosen based on the necessary output torque from the actuator 1 at electrical supply failure.
- the compression springs 14 are distributed at the inner shell of the actuator housing 2. ⁇
- a nut guide 24 in the form of an axial slit cylinder extends inward in the actuator housing 2 where it is connected to a fastener ring 26.
- the fastener ring 26 and the nut guide 24 are fixedly mounted to the fitting end part 22 and thereby to the actuator housing 2.
- a motor 28 is positioned concentrically on the fastener ring 26 as the first releasable connector 20 is mounted on the motor 28.
- the gearbox 32 is releasably connected to the fastener ring 26 by means of a gearbox holder 34 and a second releasable connector 36.
- the gearbox 32 is free to rotate relative to the actuator housing 2 and thereby unable to exercise a torque around its output shaft 38.
- the output shaft 38 is connected to the actuator shaft 12 by means of a third releasable connector 40.
- a threaded bushing 42 co-rotating with the output shaft 38 encircles the gearbox holder 34 between the fitting end portion 22 and the fastener ring 26.
- the threaded bushing 42 is outwardly provided with a relatively coarse pitch thread. If conditions so permitting, the threaded bushing 42 may be provided with multiple parallel threads .
- a nut 44 complementary fitting the threaded bushing 42 runs along the threaded bushing 42 when the threaded bushing 42 is rotated, the nut 44 being prevented from rotating around its own axis by the slit nut guide 24.
- the first releasable connector 20 is electrically controlled and releases on electric supply failure.
- the second releasable connector 36 is mechanically controlled and is
- P25101PC00DEprto - 25.07.2007 arranged to disconnect when the spring holder 18 is disconnected from the first releasable connector 20.
- the third releasable connector 40 is electrically controlled and engages on electric supply failure.
- the spring holder 18 In the actuator 1 initial condition, see fig. 1, the spring holder 18 is in its initial position where the compression springs 14 are biased.
- the first releasable connector 20 is held in a locked position by means of a control voltage.
- the second releasable connector 36 is in a locked position and the third releasable connector 40 is in a locked position in that no control voltage is applied to this one.
- Releasable connectors 20, 36, 40 are found in a variety of designs and will be known to a person skilled in the art. Thus, they are not specified any further.
- the motor 28 is arranged, via the gearbox 32, to rotate the actuator shaft 12 between its angular positions where the one angular position corresponds to the closed condition of the valve 6 and the other position corresponds to the open condition of the valve 6.
- the nut 44 is, during normal operation, displaced freely up and down along the threaded bushing 42 in that the position of the nut 44 at the fitting end portion 22 corresponds to the safe position of the valve 6.
- the compression springs 14 may, as described below, be biased without rotating the actuator shaft 12 by supplying voltage to the third releasable connector 40 whereby this connector is released, see fig. 3.
- the motor 28 rotates the drive shaft 30 in a direction that drives the nut 44 in a direction towards the compression springs 14.
- the second releasable connector 36 locks the gearbox holder 34 from rotating in the corresponding direction of rotation. After the first releasable connector 20 has locked the spring holder 18, the nut is moved to a position by the fittings end portion 22, after which the third releasable connector 40 is brought to connect the output shaft 38 to the actuator shaft 12. The actuator 1 is now brought back to its initial condition.
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2656882A CA2656882C (en) | 2006-07-13 | 2007-07-02 | Actuator device |
EA200970123A EA012690B1 (en) | 2006-07-13 | 2007-07-02 | Actuator device |
EP07793907.2A EP2041463B1 (en) | 2006-07-13 | 2007-07-02 | Actuator device |
BRPI0714129A BRPI0714129B8 (en) | 2006-07-13 | 2007-07-02 | trigger device |
US12/373,381 US8201803B2 (en) | 2006-07-13 | 2007-07-02 | Actuator device |
ES07793907T ES2427828T3 (en) | 2006-07-13 | 2007-07-02 | Actuator device |
AU2007273308A AU2007273308B2 (en) | 2006-07-13 | 2007-07-02 | Actuator device |
DK07793907.2T DK2041463T3 (en) | 2006-07-13 | 2007-07-02 | actuator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20063249A NO20063249A (en) | 2006-07-13 | 2006-07-13 | Actuator device |
NO20063249 | 2006-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008007969A1 true WO2008007969A1 (en) | 2008-01-17 |
Family
ID=38923458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2007/000246 WO2008007969A1 (en) | 2006-07-13 | 2007-07-02 | Actuator device |
Country Status (10)
Country | Link |
---|---|
US (1) | US8201803B2 (en) |
EP (1) | EP2041463B1 (en) |
AU (1) | AU2007273308B2 (en) |
BR (1) | BRPI0714129B8 (en) |
CA (1) | CA2656882C (en) |
DK (1) | DK2041463T3 (en) |
EA (1) | EA012690B1 (en) |
ES (1) | ES2427828T3 (en) |
NO (1) | NO20063249A (en) |
WO (1) | WO2008007969A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9182047B2 (en) | 2013-03-13 | 2015-11-10 | Kohler Mira Limited | Valve with fail-safe device |
EP2927535A1 (en) * | 2014-04-04 | 2015-10-07 | FESTO AG & Co. KG | Positioning device |
DE102020128530A1 (en) | 2020-10-29 | 2022-05-05 | Advanced Mechatronics GmbH | Device for controlling a valve |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5195721A (en) * | 1990-05-04 | 1993-03-23 | Ava International Corporation | Fail safe valve actuator |
GB2266943A (en) * | 1990-05-04 | 1993-11-17 | Ava Int Corp | Fail-safe valve actuator |
US5983743A (en) * | 1997-04-03 | 1999-11-16 | Dresser Industries, Inc. | Actuator assembly |
US5984260A (en) * | 1996-10-15 | 1999-11-16 | Baker Hughes Incorporated | Electrically driven actuator with failsafe feature |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9113963D0 (en) * | 1991-06-28 | 1991-08-14 | Alpha Thames Eng | Valve actuator |
NO323462B1 (en) * | 2005-08-31 | 2007-05-14 | Ifokus Engineering As | Device by actuator |
-
2006
- 2006-07-13 NO NO20063249A patent/NO20063249A/en unknown
-
2007
- 2007-07-02 AU AU2007273308A patent/AU2007273308B2/en active Active
- 2007-07-02 ES ES07793907T patent/ES2427828T3/en active Active
- 2007-07-02 WO PCT/NO2007/000246 patent/WO2008007969A1/en active Application Filing
- 2007-07-02 CA CA2656882A patent/CA2656882C/en active Active
- 2007-07-02 US US12/373,381 patent/US8201803B2/en active Active
- 2007-07-02 EA EA200970123A patent/EA012690B1/en not_active IP Right Cessation
- 2007-07-02 DK DK07793907.2T patent/DK2041463T3/en active
- 2007-07-02 EP EP07793907.2A patent/EP2041463B1/en active Active
- 2007-07-02 BR BRPI0714129A patent/BRPI0714129B8/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5195721A (en) * | 1990-05-04 | 1993-03-23 | Ava International Corporation | Fail safe valve actuator |
GB2266943A (en) * | 1990-05-04 | 1993-11-17 | Ava Int Corp | Fail-safe valve actuator |
US5984260A (en) * | 1996-10-15 | 1999-11-16 | Baker Hughes Incorporated | Electrically driven actuator with failsafe feature |
US5983743A (en) * | 1997-04-03 | 1999-11-16 | Dresser Industries, Inc. | Actuator assembly |
Also Published As
Publication number | Publication date |
---|---|
US8201803B2 (en) | 2012-06-19 |
CA2656882C (en) | 2014-11-04 |
EA200970123A1 (en) | 2009-06-30 |
AU2007273308B2 (en) | 2011-05-26 |
EP2041463B1 (en) | 2013-07-31 |
BRPI0714129B1 (en) | 2018-02-14 |
ES2427828T3 (en) | 2013-11-04 |
EP2041463A4 (en) | 2013-03-27 |
DK2041463T3 (en) | 2013-11-04 |
CA2656882A1 (en) | 2008-01-17 |
BRPI0714129B8 (en) | 2018-05-29 |
NO324899B1 (en) | 2007-12-27 |
AU2007273308A1 (en) | 2008-01-17 |
US20090302248A1 (en) | 2009-12-10 |
EA012690B1 (en) | 2009-12-30 |
EP2041463A1 (en) | 2009-04-01 |
BRPI0714129A2 (en) | 2012-12-25 |
NO20063249A (en) | 2007-12-27 |
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