CH670487A5 - - Google Patents
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- Publication number
- CH670487A5 CH670487A5 CH108/85A CH10885A CH670487A5 CH 670487 A5 CH670487 A5 CH 670487A5 CH 108/85 A CH108/85 A CH 108/85A CH 10885 A CH10885 A CH 10885A CH 670487 A5 CH670487 A5 CH 670487A5
- Authority
- CH
- Switzerland
- Prior art keywords
- load
- fluid
- housing
- vibration damper
- chamber
- Prior art date
Links
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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Fluid-Damping Devices (AREA)
Description
Die Erfindung hat mehrere Besonderheiten und Vorteile. Die Schwingungsisolierung ist in allen Axial- und Radialrichtungen gegeben. Das Aufnahmeteil 21 verhält sich wie ein Pendel, dessen Drehpunkt durch die flexible Membran 24 nach allen Azimutrichtungen verschiebbar ist und dessen Resonanzfrequenz bei gegebener Länge folglich kleiner als die eines vergleichbaren Pendels mit festem Drehpunkt ist. Das in die flüssige Teilmenge 36 des eingeschlossenen Fluids eintauchende untere Ende des Aufnahmeteils 21 bewirkt, somit eine Dämpfungswirkung sowohl auf axiale als auch radiale Schwingungen. Es wird angenommen, dass die Axialbewegungen des Aufnahmeteils 21 und der Membran 24 durch isotherme Verdichtung und Verdünnung der dampfförmigen Teilmenge des eingeschlossenen Fluids Wechsel zwischen den Dampf- und Flüssigphasen hervorrufen, durch die viel Energie vernichtet und somit eine hohe Dämpfung in der Axialrichtung erreicht wird. The invention has several special features and advantages. The vibration isolation is given in all axial and radial directions. The receiving part 21 behaves like a pendulum, the pivot point of which can be displaced in all azimuth directions by means of the flexible membrane 24 and whose resonance frequency for a given length is consequently less than that of a comparable pendulum with a fixed pivot point. The lower end of the receiving part 21, which is immersed in the liquid subset 36 of the enclosed fluid, thus has a damping effect on both axial and radial vibrations. It is assumed that the axial movements of the receiving part 21 and the membrane 24 by isothermal compression and dilution of the vaporous portion of the enclosed fluid cause changes between the vapor and liquid phases, which destroy a lot of energy and thus achieve high damping in the axial direction.
In Fig. 2 ist grafisch eine Kennlinie für den Durchlassgrad des Ausführungsbeispiels von Fig. 1 in Abhängigkeit von der Frequenz für eine Anregungsgeschwindigkeit von 0,3 in/sec (das entspricht etwa 7,6 mm/s) im Resonanzfall aufgetragen. Auf Grund ihres kompakten Aufbaus hat die erfindungsge-mässe schwingungsisolierende Vorrichtung als besonderes Merkmal eine deutlich unter 1,0 Hz liegende Resonanzfrequenz, die bedingt durch die vorstehend erläuterten hervorragenden Dämpfungseigenschaften besonders flach und mit einer sehr geringen Resonanzverstärkung verläuft. FIG. 2 graphically plots a characteristic curve for the degree of transmission of the exemplary embodiment from FIG. 1 as a function of the frequency for an excitation speed of 0.3 in / sec (this corresponds to approximately 7.6 mm / s) in the case of resonance. Due to its compact design, the vibration-isolating device according to the invention has as a special feature a resonance frequency that is clearly below 1.0 Hz, which due to the above-described excellent damping properties runs particularly flat and with a very low resonance gain.
Für die praktische Ausnutzung der Erfindung stehen viele geeignete Materialien zur Verfügung. Die festen Teile können aus Metall oder einem festen Kunststoff wie beispielsweise Noryl GFN3 hergestellt werden. Als verdampfungsfähiges Fluid in dem geschlossenen Gehäuse ist beispielsweise Dichlor-Tetrafluoräthan geeignet. Als fotoelektrische Schalteinrichtung ist eine Infrarot-Leuchtdiode in Verbindung mit einem Fototransistor verwendbar. Als Heizwiderstände sind handelsübliche 10 Watt-Widerstände geeignet. Ein praktisches Ausführungsbeispiel der Erfindung kann mit Abmessungen von weniger als 10 cm Höhe und 20 cm Durchmesser gebaut werden. Many suitable materials are available for practicing the invention. The solid parts can be made of metal or a solid plastic such as Noryl GFN3. Dichlorotetrafluoroethane, for example, is suitable as the vaporizable fluid in the closed housing. An infrared light-emitting diode in connection with a photo transistor can be used as the photoelectric switching device. Standard 10 watt resistors are suitable as heating resistors. A practical embodiment of the invention can be built with dimensions of less than 10 cm in height and 20 cm in diameter.
Die Erfindung beschränkt sich nicht auf das vorstehend erläuterte spezifische Ausführungsbeispiel; vielmehr bietet die Erfindung dem Fachmann vielseitige Möglichkeiten für diverse andere Anwendungen und/oder Abwandlungen. The invention is not limited to the specific exemplary embodiment explained above; rather, the invention offers the person skilled in the art versatile possibilities for various other applications and / or modifications.
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1 Blatt Zeichnungen 1 sheet of drawings
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57215984A | 1984-01-18 | 1984-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH670487A5 true CH670487A5 (en) | 1989-06-15 |
Family
ID=24286601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH108/85A CH670487A5 (en) | 1984-01-18 | 1985-01-10 |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS60159429A (en) |
CA (1) | CA1235714A (en) |
CH (1) | CH670487A5 (en) |
DE (1) | DE3500398A1 (en) |
FR (1) | FR2558231B1 (en) |
GB (1) | GB2153042B (en) |
IL (1) | IL73629A0 (en) |
IT (1) | IT1179500B (en) |
NL (1) | NL8403577A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02102033U (en) * | 1989-01-31 | 1990-08-14 | ||
ITMI922979A1 (en) * | 1992-12-29 | 1994-06-29 | Vela Srl | ANTI-VIBRATION ELEMENT |
WO2005083294A1 (en) * | 2004-03-01 | 2005-09-09 | Nikon Corporation | Pneumatic spring apparatus, vibration-proof apparatus, stage apparatus and exposure apparatus |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1716589U (en) * | 1955-12-07 | 1956-02-09 | Dipl Ing William Gerb Wiesbaden | Adjustable device for damping spring-loaded systems |
GB1142324A (en) * | 1965-05-10 | 1969-02-05 | Angus George Co Ltd | Improvements in or relating to pressure-fluid-operated devices |
JPS4914509B1 (en) * | 1970-04-22 | 1974-04-08 | ||
NL149576B (en) * | 1971-06-25 | 1976-05-17 | Stichting Reactor Centrum | Vibration damper. |
US3836134A (en) * | 1973-03-19 | 1974-09-17 | Wright Barry Corp | Pneumatic isolator |
IT997639B (en) * | 1973-07-23 | 1975-12-30 | Wright Barry Corp | IMPROVEMENT IN VIBRATION INSULATION SUPPORT SYSTEMS |
US3881712A (en) * | 1974-01-11 | 1975-05-06 | Sybron Corp | Damper mechanism |
US3917201A (en) * | 1974-11-07 | 1975-11-04 | Ehrenreich Photo Optical Ind | Vibration isolated table with improved mounts |
US4057212A (en) * | 1975-08-15 | 1977-11-08 | Barry Wright Corporation | Fluidic vibration isolator |
JPS5660710A (en) * | 1979-10-19 | 1981-05-25 | Tokico Ltd | Car height adjuster |
US4360184A (en) * | 1980-02-19 | 1982-11-23 | Technical Manufacturing Corporation | Pneumatic device for attenuation of vertical, horizontal and rotational dynamic forces |
JPS6047937B2 (en) * | 1980-10-17 | 1985-10-24 | 村田機械株式会社 | Spinning device with yarn splicing trolley |
JPS57127141A (en) * | 1981-01-30 | 1982-08-07 | Sanwa Tekki Corp | Multi-direction vibration-proof device |
JPS5870997A (en) * | 1981-10-22 | 1983-04-27 | Nakamura Tekkosho:Kk | Vibration-proof device for press machine |
-
1984
- 1984-11-19 FR FR848417613A patent/FR2558231B1/en not_active Expired - Fee Related
- 1984-11-20 CA CA000468200A patent/CA1235714A/en not_active Expired
- 1984-11-23 NL NL8403577A patent/NL8403577A/en not_active Application Discontinuation
- 1984-11-26 IL IL73629A patent/IL73629A0/en unknown
- 1984-11-27 GB GB08429919A patent/GB2153042B/en not_active Expired
- 1984-11-28 IT IT49218/84A patent/IT1179500B/en active
-
1985
- 1985-01-08 DE DE19853500398 patent/DE3500398A1/en not_active Ceased
- 1985-01-10 CH CH108/85A patent/CH670487A5/de not_active IP Right Cessation
- 1985-01-17 JP JP60005114A patent/JPS60159429A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
NL8403577A (en) | 1985-08-16 |
IT8449218A1 (en) | 1986-05-28 |
FR2558231B1 (en) | 1990-04-13 |
GB2153042A (en) | 1985-08-14 |
GB2153042B (en) | 1987-10-21 |
IL73629A0 (en) | 1985-02-28 |
FR2558231A1 (en) | 1985-07-19 |
IT1179500B (en) | 1987-09-16 |
IT8449218A0 (en) | 1984-11-28 |
DE3500398A1 (en) | 1985-07-25 |
CA1235714A (en) | 1988-04-26 |
GB8429919D0 (en) | 1985-01-03 |
JPS60159429A (en) | 1985-08-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |