US3783557A - Closure means for vacuum chambers - Google Patents

Closure means for vacuum chambers Download PDF

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Publication number
US3783557A
US3783557A US00190801A US3783557DA US3783557A US 3783557 A US3783557 A US 3783557A US 00190801 A US00190801 A US 00190801A US 3783557D A US3783557D A US 3783557DA US 3783557 A US3783557 A US 3783557A
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US
United States
Prior art keywords
gate plate
opening
leaf spring
gate
chamber
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.)
Expired - Lifetime
Application number
US00190801A
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English (en)
Inventor
M Heiland
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.)
Carl Schenck AG
Original Assignee
Carl Schenck Maschinenfabrik GmbH
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 Carl Schenck Maschinenfabrik GmbH filed Critical Carl Schenck Maschinenfabrik GmbH
Application granted granted Critical
Publication of US3783557A publication Critical patent/US3783557A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J13/00—Covers or similar closure members for pressure vessels in general
    • F16J13/02—Detachable closure members; Means for tightening closures

Definitions

  • the present invention relates to closure means, especially gate type closure means for vacuum chambers which have an opening extending in a vertical plane.
  • the present closure gate is especially suitable in connection with vacuum chambers or vessels for containing balancing and/or centrifugal testing equipment.
  • Balancing and centrifugal, testing equipment for example, for bladed rotors are normally placed into large cylindrical chambers arranged in a horizontal position and having a rigidly closed end wall as well as a closable end wall.
  • a so called gate is provided which, in its open condition, uncovers the entire chamber cross-sectional area in order to facilitate placing the testing equipment into the chamber as well as to remove it again.
  • Such a gate may be connected to the cylinder housing or chamber by means of hinges attached to said chamber.
  • the gate has been suspended from displaceable means arranged above the chamber.
  • the gate is displaceable in a direction extending perpendicularly to the longitudinal or central axis of the cylindrical vacuum chamber.
  • the above objects have been achieved according to the invention in a gate structure for closing the vertical opening of a vacuum chamber by supporting the gate on a carriage by means of flat or'leaf springs.
  • the resonant or natural frequency of the spring mass system comprising the gate and said supporting leaf springs is preferably selected in such a manner that said frequency is rather low, preferably close to zero.
  • the gate is supported on a carriage by two leaf spring systems arranged symmetrically relative to a vertical center line of the gate.
  • the carriage is moveable on rails which suitably should extend in the direction of the plane defining the opening of the chamber.
  • the gale 1 according to the inventionhas a circular shape.
  • the invention is not limited to such shape.
  • the invention is not limited to such shape.
  • the invention is not limited to such shape.
  • the gate could also have a square or rectangular shape.
  • gate 1 is supported on carriage means land 3 by means of flat or leaf springs 4,5, 6, and 7 which are arranged in the form of two spring systems 4 and 5 as well as 6 and 7 respectively.”
  • spring systems in turn are arranged symmetrically relative to a vertical center line of the gate and in such, a manner that the leaf springs 4 to 7 extend in parallel to the plane defining the opening in the vacuum chamber 15.
  • the opening of the chamber may be surrounded by a rim or edge for cooperation with the surface "of the gate 1 as best seen in FIG. 2.
  • the carriage means 2 and 3 are, for example, supported on rails 13, 1 4 and are displaceable in a direction parallel to theplane defined by the gate 1 or. by the plane of the opening of thechamber 15.
  • it is possible to use but one leaf spring in each system it is preferable for stabilitys sake to use two springs in each system whereby the springs of each system are arranged with a spacing therebetween as best seen in FIG. 2
  • the spring rate or stiffness of the leaf springs 4, 5, 6, and 7 is selected in such a manner that the spring mass system .comprising said leaf springs and the mass of the gate have a very low natural or resonant frequency.
  • gate 1 may be provided with additional means for pressing the gate against the chamber opening.
  • the carriage means 2 and 3 will be movable away from the position opposite the chamber opening in but one direction, for example, to the right as seen in FIG. 1. Therefore, the eyelet 11 may be arranged in a fixed position whereas the eyelet 12 would be journaled to a respective stud for tilting it between an open and a closing position.
  • the stud 9 would move into the eyelet 11 as the gate 1 is shifted leftwardly.
  • the tiltable or otherwise movable eyelet 12 is brought to engage the stud 10.
  • the eyelets 11 and 12 may, for example, beconnected to hydraulic piston cylinder arrangements and through these arrangements to the vacuum chamber 15, whereby the gate is rigidly pressed against the opening of the chamber by means of said piston cylinder arrangements not shown.
  • Another advantage of the arrangement as taught by the present invention is seen in that the lateral displacement of the gate, as compared to a displacement in the longitudinal direction of the central chamber axis, substantially eliminates the possibility of exciting the gate structure to oscillate.
  • the device for supporting and moving the gate according to the invention is substantially simplified especially the super structure has been eliminated and the ceiling or roof construction of the building for the testing facilities need not be strengthened in any particular way since the invention has eliminated suspending the gate 1 from the ceiling.
  • Another advantage of these features is seen in that the location of the chamber itself or a subsequent relocation of the chamber is substantially simplified and the location of the chamber may be selected more freely and with less .investment.
  • a closure means for a vacuum chamber having wall means defining an opening, a gate plate, fiat leaf spring means having plane surfaces, means for connecting one end of the leaf spring means to the gate plate at the bottom edge thereof so that said plane surfaces extend in parallel to a plane defined bysaid gate plate, means for movably supporting the opposite end of said leaf spring means vertically below said gate plate, said gate plate and said leaf spring means forming a spring mass system permitting the movement of the gate plate in a direction extending substantially perpendicularly to a plane defined by said opening, said spring mass system having a resonance frequency in said direction which resonance frequency is slightly above zero.
  • leaf spring means comprise two pairs of leaf springs
  • said supporting means comprising two carriage means, each of said carriage means supporting one pair of leaf springs, and rail means extending in parallel to said plane defined by said opening whereby said carriage means are movable in a direction extending perpendicularly to said first mentioned direction.
  • closure means according to claim 1, wherein said plane defined by said opening extends vertically and wherein said leaf spring means comprise two leaf spring systems arranged-symmetrically relative to a vertical center line of said gate plate.
  • closure means according to claim 1, further comprising means for-interconnecting the gate plate and the chamber for tightly pressing the gate plate against the opening of the chamber in the direction of the longitudinal chamber axis.
  • a closure means for a vacuum chamber having wall means defining an opening, a gate plate, leaf spring means, means for connecting one end of the leaf spring means to the gate plate, means for supporting the opposite end of said leaf spring means, said gate plate and said leaf spring means forming a spring mass system permitting the movement of the gate plate in a direction'extending substantially perpendicularly to a plane defined by said opening, said spring mass system having a resonance frequency in said direction which resonance frequency is slightly above zero, wherein said leaf spring means comprise at least two leaf springs extending in parallel to said opening, said supporting means comprising carriage means for supporting said two leaf springs which in turn support the door at the bottom thereof, and rail means extending in parallel to said plane defined by said opening whereby said carriage means are movable in a direction extending perpendicularly to said first mentioned direction, said opening plane extending vertically, and wherein said two leaf springs are arranged symmetrically relative to the vertical center line of said gate plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Vacuum Packaging (AREA)
  • Sliding Valves (AREA)
US00190801A 1971-08-14 1971-10-20 Closure means for vacuum chambers Expired - Lifetime US3783557A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2140880A DE2140880B2 (de) 1971-08-14 1971-08-14 Torartiger Verschluß für Vakuumkessel

Publications (1)

Publication Number Publication Date
US3783557A true US3783557A (en) 1974-01-08

Family

ID=5816806

Family Applications (1)

Application Number Title Priority Date Filing Date
US00190801A Expired - Lifetime US3783557A (en) 1971-08-14 1971-10-20 Closure means for vacuum chambers

Country Status (3)

Country Link
US (1) US3783557A (OSRAM)
DE (1) DE2140880B2 (OSRAM)
GB (1) GB1359949A (OSRAM)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256701A (en) 1979-04-10 1981-03-17 Johansson Arne I Pressure vessel with hatch
DE3632983A1 (de) * 1986-09-29 1988-03-31 Krupp Koppers Gmbh Einrichtung zur montage und demontage von an apparaten, behaeltern oder dgl. senkrecht angeordneten deckeln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1023833A (en) * 1911-02-06 1912-04-23 Frederick F Gaines Flush car-door.
US3284953A (en) * 1965-01-25 1966-11-15 Florida Aluminum Entpr Inc Sliding panel structure
US3365091A (en) * 1964-10-30 1968-01-23 Welding Research Inc Vacuum chamber
US3386203A (en) * 1965-02-23 1968-06-04 British Sterilizer Company Ltd Power-operated doors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1023833A (en) * 1911-02-06 1912-04-23 Frederick F Gaines Flush car-door.
US3365091A (en) * 1964-10-30 1968-01-23 Welding Research Inc Vacuum chamber
US3284953A (en) * 1965-01-25 1966-11-15 Florida Aluminum Entpr Inc Sliding panel structure
US3386203A (en) * 1965-02-23 1968-06-04 British Sterilizer Company Ltd Power-operated doors

Also Published As

Publication number Publication date
DE2140880B2 (de) 1975-05-15
GB1359949A (en) 1974-07-17
DE2140880C3 (OSRAM) 1976-01-02
DE2140880A1 (de) 1973-02-22

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