CN202937311U - Valve electric servo actuator of hydraulic pressure triggering safety fast valving - Google Patents
Valve electric servo actuator of hydraulic pressure triggering safety fast valving Download PDFInfo
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- CN202937311U CN202937311U CN 201220655114 CN201220655114U CN202937311U CN 202937311 U CN202937311 U CN 202937311U CN 201220655114 CN201220655114 CN 201220655114 CN 201220655114 U CN201220655114 U CN 201220655114U CN 202937311 U CN202937311 U CN 202937311U
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- valve
- hydraulic pressure
- hydraulic
- servo actuator
- speed reducer
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Abstract
The utility model discloses a valve electric servo actuator of a hydraulic pressure triggering safety fast valving and relates to the technical field of automatic control. According to the valve electric servo actuator of the hydraulic pressure triggering safety fast valving, a driver is connected with a servo motor, an output shaft of the servo motor is connected with an input end of a speed reducer, an output end of the speed reducer is connected with a hydraulic pressure clutch, the hydraulic pressure clutch is connected with a roller screw, the roller screw is connected with a valve, a spring is arranged outside the roller screw in a sleeved mode and arranged inside a manipulation seat, a linear variable differential transformer (LVDT) feedback assembly is connected with a valve rod of the valve and installed outside the manipulation seat, and the hydraulic pressure clutch is respectively connected with an emergency interceptor and an interception solenoid valve through a hydraulic pressure safety oil pipeline. The valve electric servo actuator of the hydraulic pressure triggering safety fast valving not only has the advantages of a linear electric servo actuator including simple in structure, high-efficient, easy to maintain, high in control precision, fast in response, stable in system and the like, but also can achieve relevance with the emergency interceptor by means of triggering of a gas turbine and a steam turbine fast valving through hydraulic pressure safety oil, and improves the safety performance of units. The valve electric servo actuator of the hydraulic pressure triggering safety fast valving is applicable to the valve which controls the gas turbine and the steam turbine, and can replace an electro-hydraulic servo actuator of the gas turbine and the steam turbine.
Description
Technical field:
The utility model relates to the automatic control technology field, is specifically related to the electric valve servo actuator that a kind of hydraulic pressure triggers safe quick closing valve.
Background technique:
Existing gas turbine and steam turbine control system all adopt electro-hydraulic servo actuator mostly.Owing to adopting hydraulic oil to come actuate actuators, need to be equipped with special oil sources power station and complicated oil pipe line, construction cost is expensive.Hydraulic oil easily causes leakage simultaneously, causes the system failure, not easy care.In addition, the hydraulic system transmission efficiency is very low, generally the highlyest can only reach 50%, and efficiency of energy utilization is very low.And the control accuracy of electro-hydraulic servo actuator is low, the response is slower, poor stability.
The linear electrical servo actuator can overcome the above-mentioned shortcoming of electro-hydraulic servo actuator, and the linear electrical servo actuator is simple in structure, efficient is high, be easy to maintenance, and control accuracy is high simultaneously, response is fast, system stability.But for gas turbine and steam turbine, in order to guarantee the safety of unit and electrical network, when load rejection, need the quick closedown within the very short time of final controlling element band movable valve, general linear electrical servo actuator can't be realized.In addition, gas turbine and steam turbine all dispose emergency governor, overspeed governor, the rotating speed of its safe flyball or flying barrel perception unit, in case generating unit speed surpasses setting value, and the emergency governor, overspeed governor action, venting unit hydraulic safe oil, unit is closed, and the protection to unit is provided.If use general linear electrical servo actuator, the protective function of emergency governor, overspeed governor can't be related with the linear electrical servo actuator, and unit will lose the protective function of emergency governor, overspeed governor.
The model utility content:
The purpose of this utility model is to provide the electric valve servo actuator that a kind of hydraulic pressure triggers safe quick closing valve, it had both had, and the linear electrical servo actuator is simple in structure, efficient is high, be easy to maintenance, the advantages such as control accuracy is high, response is fast, system stability, can trigger gas turbine and steam-turbine unit quick closing valve by hydraulic safe oil again simultaneously, realize related with emergency governor, overspeed governor, improve the unit safety performance, be applicable to control the valve of gas turbine and steam turbine, substitute the electro-hydraulic servo actuator of gas turbine and steam turbine.
in order to solve the existing problem of background technique, the utility model is to adopt following technological scheme: it comprises driver 1, actuating motor 2, speed reducer 3, hydraulic coupling 4, ball screw 8, spring 9, LVDT feedback component 10, handle seat 11, valve 12, it also comprises emergency governor, overspeed governor 5, blocking solenoid valve 6, hydraulic safe oil pipe line 7, driver 1 is connected with actuating motor 2, and control actuating motor 2, the input end that the output shaft of actuating motor 2 is connected with speed reducer connects, the output terminal of speed reducer 3 is connected with hydraulic coupling 4, the other end of hydraulic coupling 4 is connected with ball screw 8, ball screw 8 is connected with valve 12, the outside of ball screw 8 is set with spring 9, the spring-force driven dual of spring 9 is on valve 12, LVDT feedback component 10 is connected with the valve rod of valve 12, and spring 9 is arranged on handles 11 inside, LVDT feedback component 10 is arranged on the outside of handling seat 11, hydraulic coupling 4 by hydraulic safe oil pipe line 7 respectively with emergency governor, overspeed governor 5, blocking solenoid valve 6 connects, hydraulic coupling 4 is driven by hydraulic safe oil, and hydraulic safe oil is subject to the control of emergency governor, overspeed governor 5 and blocking solenoid valve 6, final controlling element is accepted the command signal A of gas turbine or steam turbine control system, simultaneously valve position signal B is fed back to control system, realize the closed loop control of valve.
described hydraulic coupling 4 is connected with ball screw with speed reducer 3 and is connected, and hydraulic coupling 4 is driven by hydraulic safe oil fully, the hydraulic safe oil pressure is set up, hydraulic coupling 4 is with speed reducer 3 and ball screw 8 engagements, otherwise, hydraulic safe oil venting, hydraulic coupling 4 breaks away from speed reducer 3 and ball screw 8, when operating gas turbine or steam turbine need quick closedown, emergency trip electrical signal C or emergency governor, overspeed governor 5 actions (moving or manually beat lock as flyball), with hydraulic safe oil venting, thereby triggering hydraulic coupling 4 breaks away from speed reducer 3 and ball screw 8, ball screw 8 moves downward under the effect of spring 9 power fast with movable valve 12, close gas turbine or steam-turbine unit.
Described spring 9 can be in the situation that actuating motor 2 faults (as losing power supply), overcome the reverse friction power of actuating motor 2, speed reducer 3 and ball screw 8 mechanisms, and the steam power of valve, with valve closing, realize the failure safe function.
Working principle of the present utility model is: when gas turbine or steam turbine extension lock, emergency trip electrical signal C from control system makes blocking solenoid valve 6 reset, simultaneously, emergency governor, overspeed governor 5 also must reset, only having blocking solenoid valve 6 and emergency governor, overspeed governor 5 all to complete resets, the hydraulic safe oil pressure is just set up, hydraulic coupling 4 engagements, with actuating motor 2/ speed reducer 3 and ball screw 8 engagements, final controlling element is in enabled state, only be in enabled state, final controlling element just can go to open or throttle down.
When valve need to be opened, control signal A from gas turbine or steam turbine control system delivers to driver 1, after driver 1 is processed, controlling actuating motor 2 rotates, through speed reducer 3 and hydraulic coupling 4, rotatablely move and be converted to straight line motion by ball screw 8, overcome power and the steam power of spring 9, band movable valve 12 is opened, LVDT feedback component 10 detects valve location, sends position signal B back to control system, in case valve arrives specified position, the final controlling element stop motion, valve is in specified position work.
Same, when valve need to be closed, actuating motor 2 backward rotation, through after speed reducer 3, hydraulic coupling 4 and ball screw 8, drive valve 12 and close, LVDT feedback component 10 detects valve 12 positions, send position signal B back to control system, in case valve arrives specified position, the final controlling element stop motion, valve is in specified position work.
When control system need to be closed gas turbine or steam turbine, emergency trip electrical signal C disappears, 6 actions of blocking solenoid valve, with hydraulic safe oil venting, thereby triggering hydraulic coupling 4 breaks away from speed reducer 3 and ball screw 8, ball screw 8 moves downward under the effect of spring 9 power fast with movable valve 12, closes gas turbine or steam-turbine unit.
If unit hypervelocity, but gas turbine or steam turbine control system fault, blocking solenoid valve 6 does not move, this moment, safe flyball or the flying barrel of emergency governor, overspeed governor 5 exceeded the speed limit perception, trigger emergency governor, overspeed governor 5 actions, venting hydraulic safe oil breaks away from speed reducer 3 and ball screw 8 thereby trigger hydraulic coupling 4, ball screw 8 moves downward under the effect of spring 9 power fast with movable valve 12, closes gas turbine or steam-turbine unit.
As seen, as long as blocking solenoid valve 6 or emergency governor, overspeed governor 5 any one action, just can be with hydraulic safe oil venting, thus trigger hydraulic coupling 4, close safely and fast unit, thereby realize the multiple protective of gas turbine or steam turbine, the raising unit safety.
The utility model is owing to adopting driven by servomotor, and with respect to electro-hydraulic servo actuator, transmission efficiency is higher, construction cost is low, maintenance cost is few, and control accuracy is higher, the response is faster.
The utility model is applicable to control the valve of gas turbine and steam turbine; substitute the electro-hydraulic servo actuator of gas turbine and steam turbine; can overcome that electro-hydraulic servo actuator complex structure, price are high, befouling environment, efficient are low, not easy care and the shortcoming such as control performance is poor; can trigger safe quick closing valve by hydraulic safe oil again simultaneously; for gas turbine and steam turbine provide multiple protective, improve unit safety.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Embodiment:
referring to Fig. 1, this embodiment adopts following technological scheme: it comprises driver 1, actuating motor 2, speed reducer 3, hydraulic coupling 4, ball screw 8, spring 9, LVDT feedback component 10, handle seat 11, valve 12, it also comprises emergency governor, overspeed governor 5, blocking solenoid valve 6, hydraulic safe oil pipe line 7, driver 1 is connected with actuating motor 2, and control actuating motor 2, the input end that the output shaft of actuating motor 2 is connected with speed reducer connects, the output terminal of speed reducer 3 is connected with hydraulic coupling 4, the other end of hydraulic coupling 4 is connected with ball screw 8, ball screw 8 is connected with valve 12, the outside of ball screw 8 is set with spring 9, the spring-force driven dual of spring 9 is on valve 12, LVDT feedback component 10 is connected with the valve rod of valve 12, and spring 9 is arranged on handles 11 inside, LVDT feedback component 10 is arranged on the outside of handling seat 11, hydraulic coupling 4 by hydraulic safe oil pipe line 7 respectively with emergency governor, overspeed governor 5, blocking solenoid valve 6 connects, hydraulic coupling 4 is driven by hydraulic safe oil, and hydraulic safe oil is subject to the control of emergency governor, overspeed governor 5 and blocking solenoid valve 6, final controlling element is accepted the command signal A of gas turbine or steam turbine control system, simultaneously valve position signal B is fed back to control system, realize the closed loop control of valve.
Described hydraulic coupling 4 is connected with ball screw with speed reducer 3 and is connected, and hydraulic coupling 4 is driven by hydraulic safe oil fully.The hydraulic safe oil pressure is set up, and hydraulic coupling 4 meshes speed reducer 3 and ball screw 8, otherwise, hydraulic safe oil venting, hydraulic coupling 4 breaks away from speed reducer 3 and ball screw 8.When operating gas turbine or steam turbine need quick closedown, emergency trip electrical signal C or emergency governor, overspeed governor 5 actions (are moved as flyball, or manually make lock), with hydraulic safe oil venting, thereby triggering hydraulic coupling 4 breaks away from speed reducer 3 and ball screw 8, ball screw 8 moves downward under the effect of spring 9 power fast with movable valve 12, closes gas turbine or steam-turbine unit.
Described spring 9 can be in the situation that actuating motor 2 faults (as losing power supply), overcome the reverse friction power of actuating motor 2, speed reducer 3 and ball screw 8 mechanisms, and the steam power of valve, with valve closing, realize the failure safe function.
The working principle of this embodiment is: when gas turbine or steam turbine extension lock, emergency trip electrical signal C from control system makes blocking solenoid valve 6 reset, simultaneously, emergency governor, overspeed governor 5 also must reset, only have blocking solenoid valve 6 and emergency governor, overspeed governor 5 all to complete and reset, the hydraulic safe oil pressure is just set up, hydraulic coupling 4 engagements, with actuating motor 2/ speed reducer 3 and ball screw 8 engagements, final controlling element is in enabled state.Only be in enabled state, final controlling element just can go to open or throttle down.
When valve need to be opened, control signal A from gas turbine or steam turbine control system delivers to driver 1, after driver 1 is processed, controlling actuating motor 2 rotates, through speed reducer 3 and hydraulic coupling 4, rotatablely move and be converted to straight line motion by ball screw 8, overcome power and the steam power of spring 9, band movable valve 12 is opened, LVDT feedback component 10 detects valve location, sends position signal B back to control system, in case valve arrives specified position, the final controlling element stop motion, valve is in specified position work.
Same, when valve need to be closed, actuating motor 2 backward rotation, through after speed reducer 3, hydraulic coupling 4 and ball screw 8, drive valve 12 and close, LVDT feedback component 10 detects valve 12 positions, send position signal B back to control system, in case valve arrives specified position, the final controlling element stop motion, valve is in specified position work.
When control system need to be closed gas turbine or steam turbine, emergency trip electrical signal C disappears, 6 actions of blocking solenoid valve, with hydraulic safe oil venting, thereby triggering hydraulic coupling 4 breaks away from speed reducer 3 and ball screw 8, ball screw 8 moves downward under the effect of spring 9 power fast with movable valve 12, closes gas turbine or steam-turbine unit.
If unit hypervelocity, but gas turbine or steam turbine control system fault, blocking solenoid valve 6 does not move, this moment, safe flyball or the flying barrel of emergency governor, overspeed governor 5 exceeded the speed limit perception, trigger emergency governor, overspeed governor 5 actions, venting hydraulic safe oil breaks away from speed reducer 3 and ball screw 8 thereby trigger hydraulic coupling 4, ball screw 8 moves downward under the effect of spring 9 power fast with movable valve 12, closes gas turbine or steam-turbine unit.
As seen, as long as blocking solenoid valve 6 or emergency governor, overspeed governor 5 any one action, just can be with hydraulic safe oil venting, thus trigger hydraulic coupling 4, close safely and fast unit, thereby realize the multiple protective of gas turbine or steam turbine, the raising unit safety.
This embodiment is owing to adopting driven by servomotor, and with respect to electro-hydraulic servo actuator, transmission efficiency is higher, construction cost is low, maintenance cost is few, and control accuracy is higher, the response is faster.
This embodiment is applicable to control the valve of gas turbine and steam turbine; substitute the electro-hydraulic servo actuator of gas turbine and steam turbine; can overcome that electro-hydraulic servo actuator complex structure, price are high, befouling environment, efficient are low, not easy care and the shortcoming such as control performance is poor, can trigger safe quick closing valve by hydraulic safe oil again simultaneously; for gas turbine and steam turbine provide multiple protective, improve unit safety.
Claims (1)
1. a hydraulic pressure triggers the electric valve servo actuator of safe quick closing valve, and it comprises driver (1), actuating motor (2), speed reducer (3), hydraulic coupling (4), ball screw (8), spring (9), LVDT feedback component (10), handle seat (11), valve (12) is characterized in that it also comprises emergency governor, overspeed governor (5), blocking solenoid valve (6), hydraulic safe oil pipe line (7), driver (1) is connected with actuating motor (2), the output shaft of actuating motor (2) is connected 3 with speed reducer) input end connect, the output terminal of speed reducer (3) is connected with hydraulic coupling (4), hydraulic coupling (4) is connected with ball screw (8), ball screw (8) is connected with valve (12), the outside of ball screw (8) is set with spring (9), and spring (9) is arranged on handles (11) inside, LVDT feedback component (10) is connected with the valve rod of valve (12), and LVDT feedback component (10) is arranged on the outside of handling seat (11), hydraulic coupling (4) by hydraulic safe oil pipe line (7) respectively with emergency governor, overspeed governor (5), blocking solenoid valve (6) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220655114 CN202937311U (en) | 2012-12-03 | 2012-12-03 | Valve electric servo actuator of hydraulic pressure triggering safety fast valving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220655114 CN202937311U (en) | 2012-12-03 | 2012-12-03 | Valve electric servo actuator of hydraulic pressure triggering safety fast valving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202937311U true CN202937311U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220655114 Expired - Fee Related CN202937311U (en) | 2012-12-03 | 2012-12-03 | Valve electric servo actuator of hydraulic pressure triggering safety fast valving |
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| CN (1) | CN202937311U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030094A (en) * | 2019-05-13 | 2019-07-19 | 国电环境保护研究院有限公司 | A kind of gas turbine combustion gas interrupting system |
-
2012
- 2012-12-03 CN CN 201220655114 patent/CN202937311U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030094A (en) * | 2019-05-13 | 2019-07-19 | 国电环境保护研究院有限公司 | A kind of gas turbine combustion gas interrupting system |
| CN110030094B (en) * | 2019-05-13 | 2024-02-09 | 国能南京电力试验研究有限公司 | Gas shutoff system of gas turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20141203 |
|
| EXPY | Termination of patent right or utility model |