GB545671A - Improvements in or relating to hydraulic damping devices - Google Patents
Improvements in or relating to hydraulic damping devicesInfo
- Publication number
- GB545671A GB545671A GB1115/41A GB111541A GB545671A GB 545671 A GB545671 A GB 545671A GB 1115/41 A GB1115/41 A GB 1115/41A GB 111541 A GB111541 A GB 111541A GB 545671 A GB545671 A GB 545671A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- liquid
- orifice
- chamber
- stem
- 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
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
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
- F16F15/161—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material characterised by the fluid damping devices, e.g. passages, orifices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/16—Form or construction for counteracting blade vibration
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
545,671. Vibration-dampers. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Jan. 28, 1941, No. 1115. Convention date, Jan. 10, 1940. [Class 108 (iii)] [Also in Group XXVI] Resonant vibrations in turbine blades are damped by hydraulic devices inserted in the blade ends. In one form, a body 3, Fig. 3, is suspended by a relatively flexible stem 4 from a plug 8 screwed into the blade tip and, during running, is immersed in a liquid 10 which is driven by centrifugal force through an orifice 9 into a chamber 6. Resonant vibration of the blade which is not communicated to the body 3 causes the liquid to surge through an orifice 11. The orifice 11 is essentially larger than the orifice 9. The liquid 10 is a substance with a high melting point and becomes liquid during normal high operating temperatures of the blade. Lead, metaboric acid and the nitrates of sodium and potassium are suitable. The quantity of liquid required may be reduced by filling the space round the stem 4 with a split sleeve. Instead of an apertured body, a cylindrical body with a clearance between it and the chamber 6 may be used. In another form, Fig. 6, chamber 6 has diametrically opposite holes 17 and the heavy liquid 14 surges through the holes when the blade vibrates. The chamber may be formed by a perforated disc carried by a rigid stem and fitting the cavity in the blade or the disc may be clear of the cavity so as to provide a narrow annular port.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US545671XA | 1940-01-10 | 1940-01-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB545671A true GB545671A (en) | 1942-06-08 |
Family
ID=21991993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1115/41A Expired GB545671A (en) | 1940-01-10 | 1941-01-28 | Improvements in or relating to hydraulic damping devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB545671A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1022924B (en) * | 1955-12-09 | 1958-01-16 | App Control Equip Moteurs | Protective screen for bicycles |
| FR2449826A1 (en) * | 1979-02-26 | 1980-09-19 | Textron Inc | DEVICE AND METHOD FOR PREVENTING THE TRANSMISSION OF VIBRATIONS FROM ONE BODY TO ANOTHER |
| EP0335299A1 (en) * | 1988-03-28 | 1989-10-04 | Semm-Tec Gmbh | Vibration damper for axial flow blades |
| GB2305220A (en) * | 1981-07-02 | 1997-04-02 | Secr Defence | Ships propeller dampers |
-
1941
- 1941-01-28 GB GB1115/41A patent/GB545671A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1022924B (en) * | 1955-12-09 | 1958-01-16 | App Control Equip Moteurs | Protective screen for bicycles |
| FR2449826A1 (en) * | 1979-02-26 | 1980-09-19 | Textron Inc | DEVICE AND METHOD FOR PREVENTING THE TRANSMISSION OF VIBRATIONS FROM ONE BODY TO ANOTHER |
| GB2305220A (en) * | 1981-07-02 | 1997-04-02 | Secr Defence | Ships propeller dampers |
| GB2305220B (en) * | 1981-07-02 | 1998-01-07 | Secr Defence | Propeller dampers |
| EP0335299A1 (en) * | 1988-03-28 | 1989-10-04 | Semm-Tec Gmbh | Vibration damper for axial flow blades |
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