EP0203426A1 - Stellglied zur Umwandlung einer geradlinigen in eine rotierende Bewegung - Google Patents

Stellglied zur Umwandlung einer geradlinigen in eine rotierende Bewegung Download PDF

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Publication number
EP0203426A1
EP0203426A1 EP86106259A EP86106259A EP0203426A1 EP 0203426 A1 EP0203426 A1 EP 0203426A1 EP 86106259 A EP86106259 A EP 86106259A EP 86106259 A EP86106259 A EP 86106259A EP 0203426 A1 EP0203426 A1 EP 0203426A1
Authority
EP
European Patent Office
Prior art keywords
housing
piston
actuator
cylinder
cylinders
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.)
Ceased
Application number
EP86106259A
Other languages
English (en)
French (fr)
Inventor
Edgar Heim
Alf Borkenhagen
Ragnar O. Ohrn
Knut Berge
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.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
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 Norsk Hydro ASA filed Critical Norsk Hydro ASA
Publication of EP0203426A1 publication Critical patent/EP0203426A1/de
Ceased 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
    • 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
    • F15B15/066—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 scotch yoke type

Definitions

  • the present invention relates to a mechanism for transmission of a rectilinear motion to a rotating motion, especially a hydraulic or pneumatic actuator to operate valves etc.
  • the actuator is of that type where the rectilinear power from a working cylinder is transmitted to a rotating motion by means of a pin- and fork in sliding engagement, the so-called "Scotch-Yoke" mechanism.
  • Scotch-Yoke Such a construction will provide an increasing torque near its end positions, and its curve of moments will be quite near a typical curve of moments for a flap- or butterfly valve or ball valve.
  • the construction consists of a T-formed housing with two open ends, a plunger piston which is slidable arranged in the housing between two axially separated cylinders which are securely bolted to the endpieces of the housing and form an integrated part of this.
  • a double-acting piston is slidable arranged i the housing and is supported by parallel bearings arranged in the open ends of the housing.
  • a specially designed spacer member wich has a through-going pin projecting from both sides.
  • the spacer member is fastened to the intermediate free piece of the piston by means of two screws.
  • the pin on the spacer member is slidably engaged within the longitudinal recesses of a double forked lever arm or adapter.
  • this spacer member was considered necessary to position the adapter in the actuator.
  • the outer positions of the rotating movement must further be fixed or defined by means of special abutments arranged inside the valve housing.
  • a further object of the invention is to provide a construction or design which to an essential degree simplifies the assembling and adjusting of the actuator, and where it is unnecessary to make use of the valve spindle to complete the mounting and adjustment of the actuator.
  • FIG. 1 the housing of the mechanism, on which housing is mounted two hydraulic cylinders 3, in which cylinders a piston in the form of a double-ended plunger piston 5 runs back and forth slideably mounted on two bearings 6.
  • the bearings are placed against the inner ends of the cylinders 3 and between the bearings 6 and the inner room of the housing are provided gaskets 14. Between the plunger and the inner cylinder wall is a small clearance or gap.
  • the double-acting actuator is shown in detail on Fig. 1.
  • the housing 1 leads into two lateral directed, open channels.
  • the main room has openings on the top and at the underside.
  • the underside is intended to be directly connected to the top or head flange of the valve.
  • the valve spindle runs directly into the bore of the adapter member and the bore is provided with key seats.
  • the adapter member 2 is supplied with a protruding flange on the side facing the top of the actuator housing.
  • the part which is facing against the underside of the housing is provided with stepped parts or shoulders which bear against corresponding protruding parts or edge flanges in the wall of the housing.
  • a groove is provided to accommodate an "O-ring" 19 wich secures tightening against the underside of the housing.
  • a lid 4 On the top or overside of the housing is placed a lid 4 which is fastened by means of screws or bolts, and which keep the adapter member flange in position against a schoulder in the bottom of the housing.
  • O-rings 15 and 16.
  • the adapter member is thus mounted and supported in both ends, without use of further supporting parts.
  • the adapter member 2 is further provided with a double forked lever arm, each arm having a longitudinal gap or opening which is in mesh with the through-going pin in the centraL part of the piston.
  • the two fork arms are supplied with special ears or lugs which co-operate with adjustable stop screws 20. Thereby is obtained an adjustable deflection of the rotating motion.
  • the piston cylinders 3 are supplied with external threads for screwing into the lateral directed open channels of the housing. Further there are “O-rings" 17 and 18 to secure tightening between the housing and the cylinders.
  • the channels in the housing have a considerably larger diameter than the diameter of the reciprocating piston 5, as well as the inner diameter of the corresponding cylinder 3.
  • the piston is slidably mounted in a special sleeve or supporting bearing 6 which has numerous functions. It is supported against a low inner shoulder formed internally in the lateral directed open channels of the housing.
  • a gasket 14 co-operating with an "O-ring" 18, provides the tightening or sealing against the sleeve 6 as well as against the cylinder wall when the whole unit is squeezed together in position when the threaded cylinders 3 are fastened.
  • the side of the sleeve 6, which is facing the inner side of the housing, serves as a stop or abutment for the adapter member's largest allowed deflection. This will provide a rotating deflection of about 94°.
  • the sleeve is provided with a through-going channel with the following functions:
  • Fig. 4 shows an embodiment of a single-acting actuator.
  • a spring housing 12 with an end flange 10 screwed tightly against the one open end channel of the housing.
  • a helical spring 13 bears against a spring plate 11 with an open bore or channel which encloses the end of the piston 5.
  • the sleeve 6 has a channel which provides open connection between the spring housing and the actuator housing.
  • the cylinder 3 is expanded internally and supplied with an enlarged piston 8 which co-operate with an internal cylinder sleeve 9, and is supplied with a gasket 14.
  • For tightening are used "O-rings" 17, 18 and 19. However, the mode of operation should clearly be seen from the drawing.
  • the expanded threaded end part of the housing is also here of special advantage allowing a very simple assembly of spring housing (just the same method of assembling as for an assembly of a cylinder to the actuator housing).
  • the essential advantage of the construction is its simpleness combined with dependability and stability.
  • the number of construction parts are reduced at the same time as the total weight and material consumption is reduced.
  • the actuator alone represents here a complete and functional assembled unit. It does not base its function and steadiness on the mounting and support of a valve spindle. Hereby the actuator will transfer its torque alone to the valve spindle.
  • the assembling of the actuator mechanism is also considerably simplified by its special design and construction.
  • the adapter member is placed into the housing from the top side.
  • the piston with the through-going bolt can be introduced side- ways.
  • the piston sleeves are placed in position and their mutu- ally position will be determined when the end pieces, i.e. the threaded cylinders, are fastened in end position.
  • the lid 4 is fastened with screws on the top side of the housing. This design has reduced the assembly time with more than fifty per cent compared with the conventional assembling of the actuator design described above as prior art.
  • the actuators are constructed in accordance with ISO-standard, this with regard to the torque or momentum specified as well as the specifications concerning the valve connecting flange and spindle sizes.
  • the design takes special care to obtain a simple assembling on the valve, and furthermore to obtain quick and simple service without use of special tools.
  • the construction is very robust and the actuators can be used immersed in tanks without modifications.
  • the new actuator is delivered with adjustable stroke (90 0 -2°) in both end positions, or with mecanical locking of the rotating motion in the end positions.
  • the actuator has built in local continous indication, and different types of electrical position indicator means can be included additionally.
  • Manual operation/emergency operation is performed by means of a hand pump.
  • the actuators can be equipped with a specially adjusted block unit with pressure-controlled valves and speed couplings for connecting of a conventional permanently mounted hand pump. Smaller actuator sizes can alternatively be equipped with a square nut on the top for manual operation with a spanner.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Jib Cranes (AREA)
  • Vehicle Body Suspensions (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
EP86106259A 1985-05-07 1986-05-07 Stellglied zur Umwandlung einer geradlinigen in eine rotierende Bewegung Ceased EP0203426A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO851802 1985-05-07
NO851802A NO158310C (no) 1985-05-07 1985-05-07 Aktuator for omdannelse av rettlinjet bevegelse til roterende bevegelse.

Publications (1)

Publication Number Publication Date
EP0203426A1 true EP0203426A1 (de) 1986-12-03

Family

ID=19888271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106259A Ceased EP0203426A1 (de) 1985-05-07 1986-05-07 Stellglied zur Umwandlung einer geradlinigen in eine rotierende Bewegung

Country Status (2)

Country Link
EP (1) EP0203426A1 (de)
NO (1) NO158310C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3642852A1 (de) * 1986-12-16 1988-06-30 Wabco Westinghouse Fahrzeug Einrichtung zur uebertragung einer antriebskraft zwischen zwei bauteilen
AU668685B2 (en) * 1991-04-30 1996-05-16 Mycogen Corporation Novel bacillus thuringiensis isolates for controlling acarides

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1174121A (en) * 1967-06-23 1969-12-10 Automotive Prod Co Ltd Improvements in and relating to Actuators for Producing Rotary Motion
US3507192A (en) * 1966-05-13 1970-04-21 Rjukanmaskiner As Actuator for converting rectilinear motion to rotary motion
GB1404049A (en) * 1972-11-06 1975-08-28 Gec Elliott Mech Handling Actuating devices and to actuating arrangements incorporating such devices
DE2525820A1 (de) * 1974-06-10 1976-01-02 Flo Tork Inc Drehbetaetigungsorgan und verfahren zu seiner herstellung
GB2056565A (en) * 1979-06-08 1981-03-18 Kitz Corp Valve driving fluid operated actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507192A (en) * 1966-05-13 1970-04-21 Rjukanmaskiner As Actuator for converting rectilinear motion to rotary motion
GB1174121A (en) * 1967-06-23 1969-12-10 Automotive Prod Co Ltd Improvements in and relating to Actuators for Producing Rotary Motion
GB1404049A (en) * 1972-11-06 1975-08-28 Gec Elliott Mech Handling Actuating devices and to actuating arrangements incorporating such devices
DE2525820A1 (de) * 1974-06-10 1976-01-02 Flo Tork Inc Drehbetaetigungsorgan und verfahren zu seiner herstellung
GB2056565A (en) * 1979-06-08 1981-03-18 Kitz Corp Valve driving fluid operated actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3642852A1 (de) * 1986-12-16 1988-06-30 Wabco Westinghouse Fahrzeug Einrichtung zur uebertragung einer antriebskraft zwischen zwei bauteilen
AU668685B2 (en) * 1991-04-30 1996-05-16 Mycogen Corporation Novel bacillus thuringiensis isolates for controlling acarides

Also Published As

Publication number Publication date
NO851802L (no) 1986-11-10
NO158310C (no) 1988-08-17
NO158310B (no) 1988-05-09

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19860516

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Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

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Effective date: 19880127

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18R Application refused

Effective date: 19890419

RIN1 Information on inventor provided before grant (corrected)

Inventor name: OHRN, RAGNAR O.

Inventor name: HEIM, EDGAR

Inventor name: BERGE, KNUT

Inventor name: BORKENHAGEN, ALF