CN102913291A - Novel valve electric servo actuator with safe quick-closing function - Google Patents
Novel valve electric servo actuator with safe quick-closing function Download PDFInfo
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- CN102913291A CN102913291A CN201210427549XA CN201210427549A CN102913291A CN 102913291 A CN102913291 A CN 102913291A CN 201210427549X A CN201210427549X A CN 201210427549XA CN 201210427549 A CN201210427549 A CN 201210427549A CN 102913291 A CN102913291 A CN 102913291A
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Abstract
The invention provides a novel electric valve servo actuator with the safe quick-closing function and relates to the field of automatic control. A driver of the actuator controls a servo motor; a coder is installed inside the servo motor; an output shaft of the servo motor is connected with the input end of a speed reducer; the output end of the speed reducer is connected with an electromagnetic clutch; one end of the electromagnetic clutch is connected with a roller screw; the roller screw is connected with a valve; a spring is mounted on the outer side of the roller screw in a sleeving manner; an LVDT (Linear Variable Differential Transformer) feedback component is connected with a valve rod of the valve; the spring is installed inside an operation seat; and the LVDT feedback component is installed outside the operation seat. The novel valve electric servo actuator is suitable for controlling valves of a gas turbine and a steam turbine, a high-pressure fuel-resisting servomotor and a low-pressure turbine oil servomotor of the gas turbine and the steam turbine are replaced, the defects of complicated system, high price, environmental pollution, low efficiency, uneasiness in maintenance and the like of an electro-hydraulic servo actuator can be overcome, and meanwhile, the control precision is higher, and the response is quicker.
Description
Technical field:
The present invention relates to automation field, be specifically related to a kind of novel electric valve servo actuator with safe quick closing valve function.
Background technique:
Existing gas turbine and steam turbine control system all adopt electro-hydraulic servo actuator mostly, adopt hydraulic oil to come actuate actuators.Such hydraulic actuator has two kinds usually: adopt the high pressure Servomotor of high pressure fireresistant oil, and adopt the low pressure Servomotor of low pressure turbine oil.
No matter be any hydraulic servo oil engine, all need to be equipped with an oil sources power station, and by oil pipe line to hydraulic servo oil engine fuel feeding, owing to a gas turbine or a plurality of hydraulic servo oil engines of the common needs of steam turbine, therefore required energy needs complicated pipe-line system to interconnect by oil sources power station centralizedly supply.Owing to adopting oil sources power station and complicated oil pipe line, so that construction cost is expensive.
And hydraulic oil easily causes leakage, causes the system failure.For the low pressure Servomotor that adopts turbine oil, the turbine oil burning-point is low, is easy to cause fire, and for the high pressure Servomotor that adopts fire-resistant oil, fire-resistant oil itself is a kind of virose hydraulic oil, and environmental pollution is remarkable, and needs specialized agency to come recovering and processing discarded fire-resistant oil.
Simultaneously, the hydraulic servo oil engine is because use servovalve, and is very high to the turbidity test requirement of hydraulic oil, need to constantly filter, and filter consumption is very large.Simultaneously hydraulic oil is also easily contaminated, causes agingly, after operation a period of time, just needs to change.For fire-resistant oil, very sensitive to environment especially, in case acid number is too high or moisture content is large, just need regeneration to process or change.
In a word, adopt the Servomotor of hydraulic oil, not easy care, and cost is very high.
And for hydraulic system, its transmission efficiency is very low, generally the highlyest can only reach 50%, and the oil that the oil sources power station provides is greater than the needed oil mass of Servomotor, and a large amount of oil masses consumes in oil sources power station inner loop, causes energy waste.In addition, oil sources driven force station is transported to Servomotor, generally has tens meters far away, also needs to overcome pipe resistance, causes energy waste.These all cause adopting the control system efficiency of energy utilization of Servomotor very low.
In addition, the linear electrical servo actuator of in other industrial fields, using, can't realize the quick closing valve requirement of gas turbine and steam turbine, the regulating valve of gas turbine and steam turbine need to quick closedown in 0.3 second, and general linear electrical servo actuator can't be realized this goal.
Summary of the invention:
The purpose of this invention is to provide a kind of novel electric valve servo actuator with safe quick closing valve function, it is applicable to control the valve of gas turbine and steam turbine, substitute high pressure fireresistant oil Servomotor and the low pressure turbine oil Servomotor of gas turbine and steam turbine, can overcome that electro-hydraulic servo actuator system complex, price are high, befouling environment, efficient is low and the shortcoming such as easy care not, control accuracy is higher simultaneously, response is faster.
In order to solve the existing problem of background technique, the present invention adopts following technological scheme: it comprises driver 1, actuating motor 2, encoder 3, speed reducer 4, magnetic clutch 5, ball screw 6, spring 7, valve 8, LVDT feedback component 9, handle seat 10, driver 1 control actuating motor 2, the inside of actuating motor 2 is equipped with encoder 3, the input end that the output shaft of actuating motor 2 is connected with speed reducer connects, the output terminal of speed reducer 4 is connected with magnetic clutch 5, one end of magnetic clutch 5 is connected with ball screw 6, ball screw 6 is connected with valve 8, the outside of ball screw 6 is set with spring 7, the spring-force driven dual of spring 7 is on valve 8, LVDT feedback component 9 is connected with the valve rod of valve 8, spring 7 is installed in handles seat 10 inside, LVDT feedback component 9 is installed in the outside of handling seat 10, 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, realizes the closed loop control of valve.All component are integrated into a final controlling element, and its output shaft is connected with the valve rod that is conditioned valve.
The present invention adopts driven by servomotor fully, only needs electric power, does not need to adopt any hydraulic medium, and transmission efficiency is higher, and environmentally safe.Owing to only need to provide electric power, do not need complicated hydraulic oil source power station and pipe-line system, thereby construction cost is low, maintenance cost is few, and the efficiency of energy utilization of actuating motor is very high, can reach more than 85%, and power consumption is low.
Described magnetic clutch 5 and speed reducer 4 are connected with ball screw and are connected, and magnetic clutch 5 is realized the quick closing valve function of final controlling element by the emergency trip signal C control of control system, when operating gas turbine or steam turbine need quick closedown, emergency trip signal C breaks away from magnetic clutch 5, ball screw 6 and actuating motor 2 and speed reducer 5 break away from, valve quick closedown under the effect of spring force, thus close gas turbine or steam-turbine unit.
Described spring 7 can overcome the reverse friction power of actuating motor 2, speed reducer 4 and ball screw 6 mechanisms in the situation that actuating motor 2 faults (as losing power supply), and the steam power of valve, with valve closing, realizes the failure safe function.
Working principle of the present invention is: when gas turbine or turbine system are hung lock, from the emergency trip signal C of control system so that magnetic clutch 5 is charged, actuating motor 2/ speed reducer 4 and ball screw 6 engagements, final controlling element is in enabled state.Only be in enabled state, the final controlling element output shaft just can go to open or throttle down.
When valve need to be opened, deliver to driver 1 from the control signal A of gas turbine or steam turbine control system, after driver 1 is processed, control actuating motor 2 rotates, through speed reducer 4 and magnetic clutch 5, rotatablely moving is delivered to ball screw 6 and is converted to straight line motion, overcomes spring force and steam power, drive valve opening, LVDT 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 behind speed reducer 4, magnetic clutch 5 and the ball screw 6, drive valve closing, LVDT detects valve location, 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 gas turbine or steam turbine were closed, emergency trip signal C disappeared, magnetic clutch 5 dead electricity, and actuating motor 2/ speed reducer 4 and ball screw 6 are thrown off, and under the effect of spring force, overcome the quick closedown of valve steam power.
The present invention is applicable to control the valve of gas turbine and steam turbine, substitute high pressure fireresistant oil Servomotor and the low pressure turbine oil Servomotor of gas turbine and steam turbine, can overcome that electro-hydraulic servo actuator system complex, price are high, befouling environment, efficient is low and the shortcoming such as easy care not.Control accuracy is higher simultaneously, response is faster.
Description of drawings:
Fig. 1 is structural representation of the present invention,
Fig. 2 is the structural representation of embodiment two.
Embodiment:
Embodiment one: referring to Fig. 1, this embodiment adopts following technological scheme: it comprises driver 1, actuating motor 2, encoder 3, speed reducer 4, magnetic clutch 5, ball screw 6, spring 7, valve 8, LVDT feedback component 9, handle seat 10, driver 1 control actuating motor 2, the inside of actuating motor 2 is equipped with encoder 3, the input end that the output shaft of actuating motor 2 is connected with speed reducer connects, the output terminal of speed reducer 4 is connected with magnetic clutch 5, one end of magnetic clutch 5 is connected with ball screw 6, ball screw 6 is connected with valve 8, the outside of ball screw 6 is set with spring 7, the spring-force driven dual of spring 7 is on valve 8, LVDT feedback component 9 is connected with the valve rod of valve 8, spring 7 is installed in handles seat 10 inside, LVDT feedback component 9 is installed in the outside of handling seat 10, 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, realizes the closed loop control of valve.All component are integrated into a final controlling element, and its output shaft is connected with the valve rod that is conditioned valve.
Described ball screw 6 replaces with ball screw.
This embodiment adopts driven by servomotor fully, only needs electric power, does not need to adopt any hydraulic medium, and transmission efficiency is higher, and environmentally safe.Owing to only need to provide electric power, do not need complicated hydraulic oil source power station and pipe-line system, thereby construction cost is low, maintenance cost is few, and the efficiency of energy utilization of actuating motor is very high, can reach more than 85%, and power consumption is low.
Described magnetic clutch 5 and speed reducer 4 are connected with ball screw and are connected, and magnetic clutch 5 is realized the quick closing valve function of final controlling element by the emergency trip signal C control of control system, when operating gas turbine or steam turbine need quick closedown, emergency trip signal C breaks away from magnetic clutch 5, ball screw 6 and actuating motor 2 and speed reducer 5 break away from, valve quick closedown under the effect of spring force, thus close gas turbine or steam-turbine unit.
Described spring 7 can overcome the reverse friction power of actuating motor 2, speed reducer 4 and ball screw 6 mechanisms in the situation that actuating motor 2 faults (as losing power supply), and valve, steam power, with valve closing, realize the failure safe function.
The working principle of this embodiment is: when gas turbine or turbine system are hung lock, from the emergency trip signal C of control system so that magnetic clutch 5 is charged, actuating motor 2/ speed reducer 4 and ball screw 6 engagements, final controlling element is in enabled state.Only be in enabled state, the final controlling element output shaft just can go to open or throttle down.
When valve need to be opened, deliver to driver 1 from the control signal A of gas turbine or steam turbine control system, after driver 1 is processed, control actuating motor 2 rotates, through speed reducer 4 and magnetic clutch 5, rotatablely moving is delivered to ball screw 6 and is converted to straight line motion, overcomes spring force and steam power, drive valve opening, LVDT 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 behind speed reducer 4, magnetic clutch 5 and the ball screw 6, drive valve closing, LVDT detects valve location, 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 gas turbine or steam turbine were closed, emergency trip signal C disappeared, magnetic clutch 5 dead electricity, and actuating motor 2/ speed reducer 4 and ball screw 6 are thrown off, and under the effect of spring force, overcome the quick closedown of valve steam power.
This embodiment is applicable to control the valve of gas turbine and steam turbine, substitute high pressure fireresistant oil Servomotor and the low pressure turbine oil Servomotor of gas turbine and steam turbine, can overcome that electro-hydraulic servo actuator system complex, price are high, befouling environment, efficient is low and the shortcoming such as easy care not.Control accuracy is higher simultaneously, response is faster.
Embodiment two: referring to Fig. 2, replace one different being of this embodiment and embodiment be arranged between actuating motor 2 and the speed reducer 4 by described magnetic clutch 5.Other composition is identical with embodiment one with annexation.
Claims (3)
1. the novel electric valve servo actuator with safe quick closing valve function, it is characterized in that it comprises driver (1), actuating motor (2), encoder (3), speed reducer (4), magnetic clutch (5), ball screw (6), spring (7), valve (8), LVDT feedback component (9), handle seat (10), driver (1) control actuating motor (2), the inside of actuating motor (2) is equipped with encoder (3), the output shaft of actuating motor (2) is connected 4 with speed reducer) input end connect, the output terminal of speed reducer (4) is connected with magnetic clutch (5), one end of magnetic clutch (5) is connected with ball screw (6), ball screw (6) is connected with valve (8), the outside of ball screw (6) is set with spring (7), LVDT feedback component (9) is connected with the valve rod of valve (8), spring (7) is installed in handles seat (10) inside, and LVDT feedback component (9) is installed in the outside of handling seat (10).
2. the novel electric valve servo actuator with safe quick closing valve function according to claim 1 is characterized in that described magnetic clutch (5) replacement is arranged between actuating motor (2) and the speed reducer (4).
3. the novel electric valve servo actuator with safe quick closing valve function according to claim 1, it is characterized in that described magnetic clutch (5) is connected 6 with speed reducer (4) with ball screw) be connected, and magnetic clutch (5) is realized the quick closing valve function of final controlling element by the emergency trip signal of control system, when operating gas turbine/steam turbine needs quick closedown, the emergency trip signal breaks away from magnetic clutch (5), ball screw (6) and actuating motor (2) and speed reducer (3) break away from, valve (8) quick closedown under the effect of spring force, thus close gas turbine/steam-turbine unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210427549XA CN102913291A (en) | 2012-10-31 | 2012-10-31 | Novel valve electric servo actuator with safe quick-closing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210427549XA CN102913291A (en) | 2012-10-31 | 2012-10-31 | Novel valve electric servo actuator with safe quick-closing function |
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| CN102913291A true CN102913291A (en) | 2013-02-06 |
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| CN201210427549XA Pending CN102913291A (en) | 2012-10-31 | 2012-10-31 | Novel valve electric servo actuator with safe quick-closing function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677907A (en) * | 2016-11-23 | 2017-05-17 | 沈阳黎明航空发动机(集团)有限责任公司 | Aero-engine high-pressure rotor electric rocking-turning tool |
| CN108825852A (en) * | 2018-08-13 | 2018-11-16 | 上海核工程研究设计院有限公司 | A kind of spring self-restoring formula electric valve executing mechanism |
| CN114877117A (en) * | 2022-05-31 | 2022-08-09 | 哈尔滨汽轮机厂有限责任公司 | Steam valve electric actuator with fast closing function |
| RU2814141C1 (en) * | 2023-03-16 | 2024-02-22 | Акционерное общество "УРАЛЭНЕРГОРЕМОНТ" | Steam turbine protection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039384U (en) * | 1987-06-26 | 1989-06-14 | 周乐伦 | Automatic water feed-control system for boiler |
| US20090263236A1 (en) * | 2008-04-17 | 2009-10-22 | Armin Goll | Electromechanical drive for actuating valves |
| CN202468510U (en) * | 2012-03-05 | 2012-10-03 | 杨世祥 | Plug-in flow servo valve driven by motor |
| CN202926406U (en) * | 2012-10-31 | 2013-05-08 | 上海诚动液压科技发展有限公司 | Novel electric servo actuator for valve with safe quick-closing function |
-
2012
- 2012-10-31 CN CN201210427549XA patent/CN102913291A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039384U (en) * | 1987-06-26 | 1989-06-14 | 周乐伦 | Automatic water feed-control system for boiler |
| US20090263236A1 (en) * | 2008-04-17 | 2009-10-22 | Armin Goll | Electromechanical drive for actuating valves |
| CN202468510U (en) * | 2012-03-05 | 2012-10-03 | 杨世祥 | Plug-in flow servo valve driven by motor |
| CN202926406U (en) * | 2012-10-31 | 2013-05-08 | 上海诚动液压科技发展有限公司 | Novel electric servo actuator for valve with safe quick-closing function |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677907A (en) * | 2016-11-23 | 2017-05-17 | 沈阳黎明航空发动机(集团)有限责任公司 | Aero-engine high-pressure rotor electric rocking-turning tool |
| CN108825852A (en) * | 2018-08-13 | 2018-11-16 | 上海核工程研究设计院有限公司 | A kind of spring self-restoring formula electric valve executing mechanism |
| CN114877117A (en) * | 2022-05-31 | 2022-08-09 | 哈尔滨汽轮机厂有限责任公司 | Steam valve electric actuator with fast closing function |
| RU2814141C1 (en) * | 2023-03-16 | 2024-02-22 | Акционерное общество "УРАЛЭНЕРГОРЕМОНТ" | Steam turbine protection device |
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Application publication date: 20130206 |