GB868121A - Improvements in or relating to speed governors - Google Patents
Improvements in or relating to speed governorsInfo
- Publication number
- GB868121A GB868121A GB104357A GB104357A GB868121A GB 868121 A GB868121 A GB 868121A GB 104357 A GB104357 A GB 104357A GB 104357 A GB104357 A GB 104357A GB 868121 A GB868121 A GB 868121A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- governor
- valve
- ports
- speeder
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
- Prostheses (AREA)
Abstract
868,121. Centrifugal governors. ROTOL Ltd. Dec. 13, 1957 [Jan. 10, 1957], No. 1043/57. Class 57. In a centrifugal governor, particularly for an hydraulically-operated constant - speed variable-pitch propeller, comprising flyweights 12 loaded by a speeder spring 31 and controlling the displacement of a control member such as a spool valve 16, speed creep due to temperature variation is minimized by temperature responsive means which is located between an abutment and one end of the speeder spring, has a stop for limiting the extent by which it may contract, and acts to vary the load on the speeder spring to thereby compensate at least in part for changes in the speeder spring load due to change in temperature of the spring. The flyweights 12 are pivotally mounted at 13 on a rotatable sleeve 14 having ports 20 registering with an hydraulic fluid supply channel 19 and ports 22 and 23 registering with channels 24 and 25 respectively leading to the coarse and fine pitch sides of the variablepitch propeller motor. Ports 20 lead to a space 21 between lands 17 and 18 on the valve controlling ports 22 and 23. An internal passage 16a in the valve connects the chamber 26 above the land 17 with chamber 27 below the land 18 communicating with the suction side of the governor pump. The speeder spring 31 is compressed between a flange 29 on an extension of the spool valve and a fluid-filled bellows device 33 comprising a bellows 33a sealed between members 32 and 34 and slidably housed in a bush 35 mounted in a rack member 36 having a rack 36 engaged by a pinion 37 movable by a lever 38. A sleeve 39 is located between the member 34 and an inturned flange 36b of the member 36. The member 32 has a skirt 32a which by engaging the member 34 limits the contraction of the bellows device. A ball-bearing 30 is disposed between the flange 29 and the inner ends of the weights 12. The extension of the spool valve is connected at its extremity to a rod 40 having a lost-motion connection with a rod 41 loaded by a spring 43 and operated in emergency to move the valve 16. The load on the speeder spring and thus the datum setting of the governor may be varied by rotation of the pinion 37 by lever 38. In operation, the governor maintains the propeller at constant speed by controlling its pitch hydraulically by means of the valve 16. If the temperature of the hydraulic fluid increases during operation, the increase in effective length of the spring due to heating by the fluid and the resultant tendency to increase the datum setting of the governor is offset by the expansion of the bellows device 33 which increases the load on the spring. The bellows device is designed and has a coefficient of thermal expansion such that it compensates at least in part not only for changes in effective length of the speeder spring but also for the differential expansion between the governor casing and its components and for the effect of leakage variation in the system due to fluid viscosity changes. The bellows device may be replaced by a number of superposed bimetallic washers.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB104357A GB868121A (en) | 1957-10-29 | 1957-10-29 | Improvements in or relating to speed governors |
DE1958R0015627 DE1792842U (en) | 1957-10-29 | 1958-01-09 | TEMPERATURE COMPENSATED SPEED CONTROLLER. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB104357A GB868121A (en) | 1957-10-29 | 1957-10-29 | Improvements in or relating to speed governors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB868121A true GB868121A (en) | 1961-05-17 |
Family
ID=9715172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB104357A Expired GB868121A (en) | 1957-10-29 | 1957-10-29 | Improvements in or relating to speed governors |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1792842U (en) |
GB (1) | GB868121A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115783276A (en) * | 2023-02-02 | 2023-03-14 | 江苏新扬新材料股份有限公司 | Temperature compensation device of airplane propeller speed regulator |
-
1957
- 1957-10-29 GB GB104357A patent/GB868121A/en not_active Expired
-
1958
- 1958-01-09 DE DE1958R0015627 patent/DE1792842U/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115783276A (en) * | 2023-02-02 | 2023-03-14 | 江苏新扬新材料股份有限公司 | Temperature compensation device of airplane propeller speed regulator |
Also Published As
Publication number | Publication date |
---|---|
DE1792842U (en) | 1959-07-30 |
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