CN2635922Y - Low pressure turbine oil digital electricity-liquid controller for steam turbine - Google Patents
Low pressure turbine oil digital electricity-liquid controller for steam turbine Download PDFInfo
- Publication number
- CN2635922Y CN2635922Y CN 03255413 CN03255413U CN2635922Y CN 2635922 Y CN2635922 Y CN 2635922Y CN 03255413 CN03255413 CN 03255413 CN 03255413 U CN03255413 U CN 03255413U CN 2635922 Y CN2635922 Y CN 2635922Y
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- oil
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- steam turbine
- deh
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Abstract
The utility model relates to a steam turbine digital electro-hydraulic control device using low pressure turbine oil, which comprises a digital electro-hydraulic DEH controller, an electro-hydraulic converter, an oil servo motor, a displacement sensor, a regulating valve for steam inlet of turbine and a servo card, wherein the DEH controller outputs a valve position order to the servo card; after being processed by the servo card, the signal is output to the electro-hydraulic converter which drives the oil servo motor which further drives the steam inlet regulating valve, and then the displacement of the oil servo motor is fed back to the servo card through the displacement sensor. The utility model has the advantages of flexibly changing the opening of the steam inlet valve of steam turbine, low cost, low requirement on oil quality, adopting the steam turbine oil with control accuracy equivalent to that of hydraulic oil as the turbine oil, and convenient operation and maintenance in electric power plant.
Description
Technical field
The utility model relates to steam turbine low-pressure turbine oil digital electric-hydraulic control gear.
Background technique
Steam turbine digital electricity liquid (DEH) control gear is the Computer Control Unit of directly each valve control oil engine being operated, and this control gear need convert the electrical signal to liquid SC sigmal control oil engine.Existing large-size steam turbine generally adopts digital electro-hydraulic (DEH) control gear of high pressure fireresistant oil, to improve control rate and precision.But adopt the electrohydraulic control system of high pressure fuel, the fuel feeding oil supply pressure is 12～14MPa, and oil is required height, needs a cover high-pressure fuel supply system, the cost height.Control system for present widely used middle-size and small-size steam turbine such as 135MW, 125MW and 50MW adopted the mechanical hydraulic-pressure type control system in the past, and control accuracy is low, and inconvenient operation can not satisfy the requirement that power plant's automaticity further improves.If adopt high pressure oil digital electro-hydraulic control gear, the cost height.
Summary of the invention
The purpose of this utility model is to provide a kind of steam turbine low-pressure turbine oil digital electric-hydraulic control gear.This control gear cost is low, oil is required low, and control accuracy is suitable with the high pressure oil control accuracy, and power plant operation and maintenance is convenient.
The utility model is achieved in that a kind of steam turbine low-pressure turbine oil digital electric-hydraulic control gear, comprise digital electro-hydraulic DEH controller, electro-control converter, oil engine, displacement transducer, steam turbine admission modulating valve, servo card, DEH controller delivery valve bit instruction is given servo card, after handling, servo card outputs signal to electro-control converter, electro-control converter drives oil engine, oil engine driving steam turbine admission modulating valve, the displacement of oil engine feeds back to servo card through displacement transducer.
Above-mentioned steam turbine low-pressure turbine oil digital electric-hydraulic control gear, described servo card comprises DEH instruction circuit, comparison circuit, integration circuit, output driving circuit, feeder loop, valve position output circuit, the DEH instruction circuit is accepted the instruction of DEH valve position, output connects comparison circuit, comparison circuit output connects integration circuit, integration circuit output connects output driving circuit and drives electro-control converter, displacement transducer records the oil engine displacement signal and connects feeder loop, and feeder loop also connects the comparison circuit input end and the valve position output circuit.
Working principle of the present utility model be the DEH control gear according to the steam turbine operation requirement, the aperture of control steam inlet valve is regulated the rotating speed and the load of steam turbine.The oil engine aperture that the valve position servo-system of DEH controller delivery valve bit instruction by compositions such as servo card, electro-control converter, oil engine, displacement transducers will drive valve is controlled at valve position and instructs on the corresponding position, controls the rotating speed and the load of steam turbine accurately.The DEH control gear can be nimbly and freely the aperture of change turbine admission valve, this control gear cost is low, oil is required low, the turbine oil of employing is a steam turbine with oil, control accuracy is suitable with the high pressure oil control accuracy, power plant operation and maintenance makes things convenient for.
Description of drawings
Fig. 1 is the utility model steam turbine low-pressure turbine oil digital electric-hydraulic control gear block diagram, and Fig. 2 is servo card theory diagram, and Fig. 3 is servo card circuit theory diagrams.
Among the figure: 1 digital electro-hydraulic DEH controller, 2 servo cards, 3 electro-control converters, 4 oil engines, 5 steam turbine admission modulating valve, 6 displacement transducers, 7DEH instruction circuit, 8 comparison circuits, 9 integration circuit, 10 output driving circuits, 11 feeder loops, 12 valve position output circuits.
Embodiment
Provide a preferred embodiment of the present utility model in conjunction with the accompanying drawings.
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of steam turbine low-pressure turbine oil digital electric-hydraulic control gear, comprise digital electro-hydraulic DEH controller 1, electro-control converter 3, oil engine 4, displacement transducer 6, steam turbine admission modulating valve 5, servo card 2, DEH controller 1 delivery valve bit instruction is given servo card 2, after handling, servo card 2 outputs signal to electro-control converter 3, electro-control converter 3 drives oil engine 4, oil engine 4 driving steam turbine admission modulating valve 5, the displacement of oil engine 4 feeds back to servo card 2 through displacement transducer 6.Servo card 2 comprises DEH instruction circuit 7, comparison circuit 8, integration circuit 9, output driving circuit 10, feeder loop 11, valve position output circuit 12.DEH instruction circuit 7 is accepted the valve position instruction electrical signal of DEH controller 1 output, and output connects comparison circuit 8 after the operational amplifier computing, and comparison circuit 8 is accepted oil engine 4 aperture feedback signals simultaneously and compared.Oil engine 4 aperture feedback signals record and are converted into the electrical signal that is directly proportional with aperture by displacement transducer 6 and insert feeder loop 11, and feeder loop 11 outputs also connect comparison circuit 8 input ends and valve position output circuit 12.If the valve position instruction deviation occurs with feedback signal, comparison circuit 8 connects integration circuit 9 with the deviation output of two signals, output connects output driving circuit 10 after integration circuit 9 computings, and output driving circuit 10 amplifies back output 0～350mA with signal and drives electro-control converter 3.The corresponding driving current conversion become the fuel injection pressure signal that can be accepted by oil engine 4 in electro-control converter 3, thereby change the aperture of oil engine 4, this process is until the deviation of valve position instruction and feedback signal is zero just end.
Steam turbine low-pressure turbine oil digital electric-hydraulic control gear is by the valve position instruction of control DEH controller output, through the valve position servo-system, all the time make the valve position instruction consistent with the aperture of admission valve, that is to say, the change of each valve position instruction will obtain the corresponding change of an admission valve aperture, make the steam turbine low-pressure turbine oil digital electric-hydraulic control gear aperture that is changing turbine admission valve nimbly and freely, control the rotating speed and the load of steam turbine accurately.
Claims (2)
1. steam turbine low-pressure turbine oil digital electric-hydraulic control gear, comprise digital electro-hydraulic DEH controller, electro-control converter, oil engine, displacement transducer, steam turbine admission modulating valve, it is characterized in that this control gear also comprises servo card, DEH controller delivery valve bit instruction is given servo card, after handling, servo card outputs signal to electro-control converter, electro-control converter drives oil engine, oil engine driving steam turbine admission modulating valve, and the displacement of oil engine feeds back to servo card through displacement transducer.
2. steam turbine low-pressure turbine oil digital electric-hydraulic control gear according to claim 1, it is characterized in that servo card comprises DEH instruction circuit, comparison circuit, integration circuit, output driving circuit, feeder loop, valve position output circuit, the DEH instruction circuit is accepted the instruction of DEH valve position, output connects comparison circuit, comparison circuit output connects integration circuit, integration circuit output connects output driving circuit and drives electro-control converter, displacement transducer records the oil engine displacement signal and inserts feeder loop, and feeder loop also connects the comparison circuit input end and the valve position output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03255413 CN2635922Y (en) | 2003-07-09 | 2003-07-09 | Low pressure turbine oil digital electricity-liquid controller for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03255413 CN2635922Y (en) | 2003-07-09 | 2003-07-09 | Low pressure turbine oil digital electricity-liquid controller for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2635922Y true CN2635922Y (en) | 2004-08-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03255413 Expired - Lifetime CN2635922Y (en) | 2003-07-09 | 2003-07-09 | Low pressure turbine oil digital electricity-liquid controller for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2635922Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629496B (en) * | 2009-07-30 | 2011-08-17 | 杭州和利时自动化有限公司 | Digital electrohydraulic control system of steam turbine with isolated network operation |
| CN102360177A (en) * | 2011-09-15 | 2012-02-22 | 江苏科技大学 | Electro-hydraulic linear speed servo system |
| CN104018894A (en) * | 2014-05-28 | 2014-09-03 | 中广核核电运营有限公司 | Checking processing method of steam turbine electric hydraulic control system pulse impact |
| CN109736903A (en) * | 2019-03-07 | 2019-05-10 | 中国船舶重工集团公司第七0四研究所 | The electro-hydraulic speed-regulating system of ship turbine-generator group high pressure of more valve heavy wool motivations |
-
2003
- 2003-07-09 CN CN 03255413 patent/CN2635922Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629496B (en) * | 2009-07-30 | 2011-08-17 | 杭州和利时自动化有限公司 | Digital electrohydraulic control system of steam turbine with isolated network operation |
| CN102360177A (en) * | 2011-09-15 | 2012-02-22 | 江苏科技大学 | Electro-hydraulic linear speed servo system |
| CN102360177B (en) * | 2011-09-15 | 2013-05-15 | 江苏科技大学 | Electro-hydraulic linear speed servo system |
| CN104018894A (en) * | 2014-05-28 | 2014-09-03 | 中广核核电运营有限公司 | Checking processing method of steam turbine electric hydraulic control system pulse impact |
| CN104018894B (en) * | 2014-05-28 | 2016-02-03 | 中广核核电运营有限公司 | The check processing method of electrohydraulic steam turbine controlling system pulsatile impact |
| CN109736903A (en) * | 2019-03-07 | 2019-05-10 | 中国船舶重工集团公司第七0四研究所 | The electro-hydraulic speed-regulating system of ship turbine-generator group high pressure of more valve heavy wool motivations |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang District: 201100 Patentee after: Shanghai Electric Station Equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Patentee before: Shanghai Steam Turbine Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130709 Granted publication date: 20040825 |