GB1092997A - Improvements relating to hydraulic servo systems - Google Patents
Improvements relating to hydraulic servo systemsInfo
- Publication number
- GB1092997A GB1092997A GB790565A GB790565A GB1092997A GB 1092997 A GB1092997 A GB 1092997A GB 790565 A GB790565 A GB 790565A GB 790565 A GB790565 A GB 790565A GB 1092997 A GB1092997 A GB 1092997A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- land
- piston
- pressure
- lever
- 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
- 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
- F15B5/00—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities
- F15B5/003—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities characterised by variation of the pressure in a nozzle or the like, e.g. nozzle-flapper system
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
Abstract
1,092,997. Fluid-pressure servomotor systems. BRITISH AIRCRAFT CORPORATION (OPERATING) Ltd. March 15, 1966 [Feb. 24, 1965], No. 7905/65. Heading G3P. [Also in Division G1] A hydraulic servo control system comprises a control device of the jet and flapper type in which a gyroscope is directly connected to the flapper. The output signal of the gyroscope 1 moves a lever.2 about its pivot 3 to cause the lever to vary the back pressure of a jet or nozzle 7 supplied via a restriction 8, such pressure variation being communicated via line 10 to a relay valve as described below. The movable cylinder 5 of a dashpot is connected via spring 4 with arm 2" of lever 2 and serves to make the movement of the lever proportional to the time integral of the signal from the gyroscope. The movable cylinder 12 of a stabilizing dashpot is directly connected to arm 2", and a spring 14 adjustably loads arm 2'. Opposite sides of the fixed pistons 5', 12' of the dashpots are interconnected by restrictions 6, 13 which may be of any of the forms indicated in Figs. 2a-d, (not shown). The relay valve Fig. 3a (not shown) comprises a piston having spaced lands 53, 54, a high-pressure inlet 25, a drain port (26) and an outlet 27 connected to a power device (Fig. 4). The signal in line 10 acts on land 53 and the outlet 27 communicates with land 54 via restriction 56. In the alternative relay valve of Fig. 3b (not shown), land (53') has a central extension (31) acted on by the signal in line (10), and the annular area of land (53') is acted on by a further signal in line (30). Land (54') abuts a spring (32) carried by a piston (34) which latter is mechanically movable to introduce another input signal. The power device comprises a pilot valve 67, 37 and a piston 65, 42, the pilot valve controlling communication between larger annular chamber 40 above piston 65 and either exhaust 41 or input 127. If the input signal from the relay valve increases, valve head 37 moves downwardly against spring 36 and admits the new signal pressure to chamber 40 thereby moving the piston downwardly until valve 37 is reseated. In the practical embodiment of Figs. 5-7 (not shown), the gimbal shaft (3) itself co-operates with the nozzles (7), the shaft being provided with flats for this purpose. The end of shaft (3) carries two leaf springs (4') the free ends of which carry pistone (73) supported by diaphragms (74), opposite sides of the latter being connected via capillary tubing. Pistons (73) thus form the movable elements of a pair of integrating dashpots. A vane (2) carried by shaft (3) is movable between stops (11) in a chamber (12) to form the stabilizing dashpot, opposite sides of the vane being connected via a restriction of the type shown in Fig. 2d, which latter has an arrangement of four orifices forming a bridge network which gives a linear relationship between rate of displacement and applied force and a pressure drop independent of viscosity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB790565A GB1092997A (en) | 1965-02-24 | 1965-02-24 | Improvements relating to hydraulic servo systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB790565A GB1092997A (en) | 1965-02-24 | 1965-02-24 | Improvements relating to hydraulic servo systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1092997A true GB1092997A (en) | 1967-11-29 |
Family
ID=9842061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB790565A Expired GB1092997A (en) | 1965-02-24 | 1965-02-24 | Improvements relating to hydraulic servo systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1092997A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013057553A1 (en) * | 2011-10-17 | 2013-04-25 | Eaton Corporation | Aircraft hydraulic air bleed valve system |
CN104847714A (en) * | 2015-04-20 | 2015-08-19 | 大连理工大学 | Flow-pressure proportional converting device based on alternating-flow hydraulics |
-
1965
- 1965-02-24 GB GB790565A patent/GB1092997A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013057553A1 (en) * | 2011-10-17 | 2013-04-25 | Eaton Corporation | Aircraft hydraulic air bleed valve system |
CN104847714A (en) * | 2015-04-20 | 2015-08-19 | 大连理工大学 | Flow-pressure proportional converting device based on alternating-flow hydraulics |
CN104847714B (en) * | 2015-04-20 | 2017-01-04 | 大连理工大学 | Flow pressure ratio conversion equipment based on AC hydraulic |
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