GB664810A - Improvements in or relating to steam turbines - Google Patents
Improvements in or relating to steam turbinesInfo
- Publication number
- GB664810A GB664810A GB18976/49A GB1897649A GB664810A GB 664810 A GB664810 A GB 664810A GB 18976/49 A GB18976/49 A GB 18976/49A GB 1897649 A GB1897649 A GB 1897649A GB 664810 A GB664810 A GB 664810A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- piston
- steam
- governor
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/205—Centrifugal governers directly linked to valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
664,810. Fluid-pressure servomotor control systems. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. July 19, 1949 [Aug. 11, 1948], No. 18976/49. Class 135 A steam turbine having a valve controlled by a fluidpressure servomotor to regulate the flow of steam to the turbine in accordance with its speed includes a speed governor 9, Fig. 2, an emergency overspeed governor 10 and a steam chest 12 for the admission valve 28 and the servomotor. The servomotor comprises differential pistons 42, 44 slidable in a cylinder 26 surrounded by a sleeve 25 leaving a space 53 therebetween through which passes inlet steam to the face 51 of the piston 44. The piston 42 is integral with the valve 28 and a stem 46 which abuts the piston 44, whilst the piston 44 has an axial bore 58 controlled by a needle valve 60 operatively connected to the governor 9 by a spring 72 and a lever 69 to permit the escape of steam from the face 51 through the bore 58 and a passage 58b to atmosphere. On, e.g. a decrease in turbine speed due to increased load, the lever 69 turns anti-clockwise so that the valve 60 opens and releases the pressure on the piston 44 to exhaust and the now unbalanced pressure on the left face of the piston 42 moves the piston assembly to the right to follow-up the movement of the valve 60 and open the valve 28 until the forces on the pistons 42, 44 are again equal. In the event of overspeeding of the turbine, the governor 10 acts through a lever and spring '(not shown) to disengage a cam piece 79 from a spring- loaded cup member 74 which, when released, engages a collar 84 to move the valve 60 to close the bore 58 and hence move the piston assembly to the left to close the valve 28. To reset the overspeed governor after use a lever 85 is provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US43719A US2571707A (en) | 1948-08-11 | 1948-08-11 | Turbine apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB664810A true GB664810A (en) | 1952-01-09 |
Family
ID=21928539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18976/49A Expired GB664810A (en) | 1948-08-11 | 1949-07-19 | Improvements in or relating to steam turbines |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2571707A (en) |
| GB (1) | GB664810A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431369A (en) * | 1981-10-22 | 1984-02-14 | Edison International | Governor control linkage assembly for overspeed protection of turbines during restarting |
| US9057450B2 (en) * | 2013-03-13 | 2015-06-16 | Elliott Company | Valve exerciser for an emergency shutoff valve of a steam turbine and method for using the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US861054A (en) * | 1905-12-19 | 1907-07-23 | Gen Electric | Governing mechanism for turbines. |
| US934432A (en) * | 1906-03-19 | 1909-09-21 | Westinghouse Machine Co | Governing mechanism for elastic-fluid turbines. |
| US1093116A (en) * | 1913-07-30 | 1914-04-14 | Gen Electric | Governing mechanism for turbines. |
| US1616953A (en) * | 1923-08-29 | 1927-02-08 | Dahlstrand Josef Yngve | Rotary fluid motor |
| GB275572A (en) * | 1926-08-04 | 1928-03-01 | Onsrud Machine Works Inc | Improvements in or relating to governing devices for turbines |
-
1948
- 1948-08-11 US US43719A patent/US2571707A/en not_active Expired - Lifetime
-
1949
- 1949-07-19 GB GB18976/49A patent/GB664810A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2571707A (en) | 1951-10-16 |
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