CN2167192Y - Pneumatic executive mechanism for speed adjustment for steam turbine - Google Patents
Pneumatic executive mechanism for speed adjustment for steam turbine Download PDFInfo
- Publication number
- CN2167192Y CN2167192Y CN 93238296 CN93238296U CN2167192Y CN 2167192 Y CN2167192 Y CN 2167192Y CN 93238296 CN93238296 CN 93238296 CN 93238296 U CN93238296 U CN 93238296U CN 2167192 Y CN2167192 Y CN 2167192Y
- Authority
- CN
- China
- Prior art keywords
- actuating mechanism
- pneumatic
- piston
- steam turbine
- speed adjustment
- 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 - Fee Related
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- Actuator (AREA)
Abstract
The utility model belongs to a pneumatic actuating mechanism which is especially suitable for rotary speed adjustment for steam turbines. An actuating mechanism of a speed adjustment system of the existing steam turbine for controlling an adjusting valve is a hydraulic type; the pneumatic actuating mechanism is a pneumatic type. The pneumatic actuating mechanism is directly connected with a lever component through a pneumatic piston component, and the displacement of a piston rod of the piston component is transferred to a travelling positioning component through a connecting rod to be controlled by the travelling positioning component. The pneumatic actuating mechanism has simple structure and can be used without daily maintenance. The utility model can be used as a pneumatic actuating mechanism in the mechanical-electrical integration of a steam turbine.
Description
The utility model relates to a kind of pneumatic actuator, especially for the pneumatic actuator of turbine speed adjusting.
The rotational speed regulation of existing steam turbine has mechanical hydraulic-pressure type, electrolyte type, digital hydraulic type regulating system, and the actuator of their regulating and controlling valves all is the formula of surging.Along with the progress of steam turbine electromechanical integration, steam turbine speed detects and the speed controlling link is all replaced by electronic equipment, the actuator between they and the steam regulation valve, and as also using hydraulic actuator, the complex structure that just seems, it is inconvenient to safeguard.
Proposing the purpose of this utility model, is to propose a kind of pneumatic actuator, and the hydraulic actuator with it replaces turbine regulating system to use makes its designs simplification, does not need regular maintenance.
The purpose of this utility model is achieved in that and adopts a piston assembly, its output piston bar directly links to each other with lever assembly, and the displacement of piston rod passes to the stroke positioning component that is installed in the next door and controlled by it by connecting rod, like this by the displacement of the piston rod of the piston assembly of stroke positioning component control, go to control the aperture of steam regulation valve by the effect of lever assembly, thereby realized the effect of pneumatic actuator.
The utility model is because only need to constitute with general piston assembly, stroke positioning component and general lever assembly, so simple in structure, rate of fault is low, does not need regular maintenance.
The concrete structure of model utility is provided by following embodiment and accompanying drawing thereof.
Accompanying drawing is the structural drawing according to the pneumatic actuator of the turbine speed adjusting that the utility model proposes.
Below in conjunction with details and the working condition of accompanying drawing detailed description according to the concrete mechanism that the utility model proposes.
This mechanism comprises a piston assembly (1), and the piston rod of piston assembly (6) directly links to each other with lever assembly (3).The cam (11) that is installed in the stroke positioning component (2) on next door links to each other with piston rod (6) by connecting rod.
Piston assembly (1) comprises cylinder (4), piston (5) and piston rod (6); Stroke positioning component (2) comprises bellows (9), guiding valve (10), cam (11); Lever assembly (3) comprises the lever (8) of connection part (7) and band fulcrum.
Working procedure of the present utility model is like this: the gas signal of regulating and controlling valve opening enters bellows (9) by pipe (13), make guiding valve (10) action after the bellows distortion, guiding valve will be assigned to by the source of the gas that source of the gas pipe (12) enter in piston assembly top suction tude (14) and the bottom suction tude (15), and piston (5) moves or moves down under the upper and lower draught head effect.After the piston action, piston rod (6) drives the lever (8) of connection piece (7), band fulcrum on the one hand, makes steam regulation valve (16) open greatly or turn down; On the other hand, piston rod drives cam (11) again, and its stroke reverse feedback is fed back into, and makes guiding valve (10) get back to certain certain value, and at this moment, piston (5) just is parked on the new equilibrium position, and this position and signal are proportional.
Claims (1)
1, a kind of pneumatic actuator, actuator especially for the turbine speed adjusting, there is a piston assembly (1) in this mechanism, it is characterized in that its output piston bar (6) directly links to each other with lever assembly (3), and piston rod (6) links to each other with stroke positioning component (2) by connecting rod again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93238296 CN2167192Y (en) | 1993-03-11 | 1993-03-11 | Pneumatic executive mechanism for speed adjustment for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93238296 CN2167192Y (en) | 1993-03-11 | 1993-03-11 | Pneumatic executive mechanism for speed adjustment for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2167192Y true CN2167192Y (en) | 1994-06-01 |
Family
ID=33813060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93238296 Expired - Fee Related CN2167192Y (en) | 1993-03-11 | 1993-03-11 | Pneumatic executive mechanism for speed adjustment for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2167192Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153828A (en) * | 2014-07-24 | 2014-11-19 | 中国长江动力集团有限公司 | Turbine admission regulating valve link mechanism |
| CN107407159A (en) * | 2015-10-02 | 2017-11-28 | 艾利奥特公司 | Pneumatic cut-off valve pratial stroke device |
| CN108005736A (en) * | 2017-11-24 | 2018-05-08 | 胡莎 | The small machine high back pressure heating system of feed pump and device |
-
1993
- 1993-03-11 CN CN 93238296 patent/CN2167192Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153828A (en) * | 2014-07-24 | 2014-11-19 | 中国长江动力集团有限公司 | Turbine admission regulating valve link mechanism |
| CN104153828B (en) * | 2014-07-24 | 2015-07-15 | 中国长江动力集团有限公司 | Turbine admission regulating valve link mechanism |
| CN107407159A (en) * | 2015-10-02 | 2017-11-28 | 艾利奥特公司 | Pneumatic cut-off valve pratial stroke device |
| US10648357B2 (en) | 2015-10-02 | 2020-05-12 | Elliott Company | Pneumatic trip valve partial stroking arrangement |
| CN108005736A (en) * | 2017-11-24 | 2018-05-08 | 胡莎 | The small machine high back pressure heating system of feed pump and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |