GB832648A - Improvements in hydraulic servo-mechanism for a reheat-type steam turbine intercept valve - Google Patents
Improvements in hydraulic servo-mechanism for a reheat-type steam turbine intercept valveInfo
- Publication number
- GB832648A GB832648A GB30074/57A GB3007457A GB832648A GB 832648 A GB832648 A GB 832648A GB 30074/57 A GB30074/57 A GB 30074/57A GB 3007457 A GB3007457 A GB 3007457A GB 832648 A GB832648 A GB 832648A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- piston
- speed
- intercept
- turbine
- 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
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
- F01K7/24—Control or safety means specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
832,648. Turbines. GENERAL ELECTRIC CO. Sept. 25, 1957 [Oct. 22, 1956], No. 30074/57. Class 110 (3). [Also in Group XXIX] In a re-heat-type steam turbine power plant 1, 2 having an emergency speed control system 8, 8a, 8b, controlling main and re-heat stop valves 1b and 10 respectively, and a preemergency speed control system 12-15 controlling the intercept valve 9, the latter system has a control arrangement which does not effect operation of the intercept valve by the pre-emergency system during intercept valve movements below a preselected rate corresponding to a preselected rate of turbine acceleration, but which rapidly closes the intercept valve for accelerations above the preselected rate. Water from condenser 4 is pumped at 5 to a primary boiler 6a and steam passes the main stop valve 1b and a main control valve 1a controlled by governor 7 to a high pressure turbine 1. The steam then passes to a re-heat boiler 6b, the re-heat stop valve 10 and the intercept valve 9 to a low pressure turbine 2 connected to the condenser. Should the speed increase slowly to 101% of rated speed, a governor 11 moves piston valve 24 downward to shut-off oil pressure at 17 and open drain port 18 so that spring 23 moves piston 21, piston valve 15a and dashpot piston 13b downward, the latter moving at a speed below the maximum permitted by the dashpot needle valve 13j, so that piston valve 14a abuts stop 14h and oil acts on piston 14d to keep a drain valve 14g closed. Downward movement of valve 15a releases oil pressure from piston 15c so that it closes the intercept valve 9 at a 105% of rated speed. Should the turbine accelerate at a rate greater than the permitted rate of descent of the dashpot piston, downward movement of piston 21 rocks lever 30 about fulcrum 30b on the dashpot piston and lifts valve 14a to drain oil from piston 14d and open drain valve 14g whereby piston 15c quickly closes the intercept valve 9. If the speed exceeds about 110%, the emergency speed governor 8 trips and closes valves 8a, 8b, 1b and 10 to shut down the turbine.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US832648XA | 1956-10-22 | 1956-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB832648A true GB832648A (en) | 1960-04-13 |
Family
ID=22177216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30074/57A Expired GB832648A (en) | 1956-10-22 | 1957-09-25 | Improvements in hydraulic servo-mechanism for a reheat-type steam turbine intercept valve |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB832648A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806959A (en) * | 2012-11-14 | 2014-05-21 | 中国广东核电集团有限公司 | Method and device for preventing turbine control system of nuclear power station from generating disturbance |
-
1957
- 1957-09-25 GB GB30074/57A patent/GB832648A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806959A (en) * | 2012-11-14 | 2014-05-21 | 中国广东核电集团有限公司 | Method and device for preventing turbine control system of nuclear power station from generating disturbance |
| CN103806959B (en) * | 2012-11-14 | 2015-06-24 | 中国广东核电集团有限公司 | Method and device for preventing turbine control system of nuclear power station from generating disturbance |
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