CN202970806U - Electrohydraulic servo control device - Google Patents
Electrohydraulic servo control device Download PDFInfo
- Publication number
- CN202970806U CN202970806U CN 201220593402 CN201220593402U CN202970806U CN 202970806 U CN202970806 U CN 202970806U CN 201220593402 CN201220593402 CN 201220593402 CN 201220593402 U CN201220593402 U CN 201220593402U CN 202970806 U CN202970806 U CN 202970806U
- Authority
- CN
- China
- Prior art keywords
- servo
- control
- hydraulic
- cylinder
- electrohydraulic
- 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 - Lifetime
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 claims abstract description 12
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Abstract
The utility model discloses an electrohydraulic servo control device, which consists of a hydraulic oil source (1), an electrohydraulic servo valve (2), a servo oil cylinder (3), an oil handle mechanism (4), a servo controller (5), a position sensor (6), a hydraulic lock (7), a valve plate (8) and a controller (9), wherein the controller (9), the servo controller (5), the electrohydraulic servo valve (2), the servo oil cylinder (3), the oil handle mechanism (4) and the valve plate (8) are connected in sequence; the hydraulic oil source (1) is connected with the hydraulic lock (7), and the two are connected with the electrohydraulic servo valve (2); and the position sensor (6) is connected with the servo controller (5) and the oil handle mechanism (4) respectively. The electrohydraulic servo control device has the obvious advantages of high linearity, small dead region, high sensitivity, good dynamic performance, quick response and the like. About 30 percent of energy required by a blast furnace blower can be recovered during normal operation of the device; and considerable economic benefit and social benefit are created for steel and iron enterprises.
Description
Technical field:
The utility model relates to the design of electro-hydraulic servo control apparatus structure and applied technical field science, and a kind of electro-hydraulic servo control device is provided especially.
Background technique:
In prior art, the electro-hydraulic servo control technology has become the important composition of modern control technology as the bridge that connects modern microelectronic technology, computer technology and hydraulics.Due to remarkable advantages such as it have good linearity, the dead band is little, highly sensitive, and dynamic performance is good, response is fast, precision is high, thereby be widely used.
Blast-furnace top gas recovery energy recovery turbine electricity generating device is (referred to as TRT, Blast-Furnace Top pressure Recovery Turbine Unit) be to utilize pressure energy and the heat energy that contains in blast furnace outlet coal gas, make the turbo-expander work done, drive a kind of energy recycle device of generator generating.It can reach the purpose of energy-conservation, noise reduction, environmental protection, has good economic benefit and social benefit, is modern international, energy-saving environmental protection device that domestic iron and steel enterprises is generally acknowledged at present.The TRT automatic control system is divided into 6 systems such as main coal gas system, lubricating oil system, electrohydraulic servo-controlling system (power oil system), turbine shaft movement detection systems, nitrogen-sealed system and water system.Wherein, electro-hydraulic servo control is is one of key component, and therefore, people expect to obtain the good electro-hydraulic servo control device of a kind of technique effect.
The model utility content:
The purpose of this utility model is to provide the good electro-hydraulic servo control device of a kind of technique effect.
The utility model provides a kind of electro-hydraulic servo control device, is used for blast-furnace top gas recovery energy recovery turbine electricity generating device; It is characterized in that: it is constructed as follows: hydraulic oil source 1, electrohydraulic control 2, servo-cylinder 3, oily handle mechanism 4, servocontroller 5, position transducer 6, hydraulic lock 7, valve plate 8, controller 9; Wherein: controller 9, servocontroller 5, electrohydraulic control 2, servo-cylinder 3, oily handle mechanism 4, valve plate 8 are linked in sequence successively; Hydraulic oil source 1 is connecting hydraulic lock 7, and both also is connected connection with electrohydraulic control; Position transducer 6 is connected with servocontroller 5, oily handle mechanism 4 respectively;
The electro-hydraulic servo control device is supplied to consist of electrohydraulic servo-controlling system by mechanical, electrical, liquid, and its controlling party block diagram as shown in Figure 1; By the command signal that controller 9 sends, compare with the actual position signal of servo-cylinder 3 in servocontroller 5, after becoming the signal amplification of error, send into electrohydraulic control 2.Electrohydraulic control 2 is transformed into current signal according to a certain percentage hydraulic pressure oil mass amount and promotes servo-cylinder 3 motions; The feedback signal of being sent by position transducer 6 constantly changes, until when command signal equates, servo-cylinder 3 stop motions; Servo-cylinder 3 is parked on the position of appointment, and the turbine generator stator blade is stabilized on certain aperture;
The straight line motion of servo-cylinder 3, be transformed into rotatablely moving of valve plate 8 or turbine generator stator blade by oily handle mechanism 4, change the work aperture of valve plate 8 or turbine generator stator blade; Along with the continuous variation of command signal, the aperture of turbine stator blade also will constantly change, and the variation by the stator blade aperture, reach the control revolution, control gas flow, control the exert oneself purpose of size of turbine.Its power oil system control graph as shown in Figure 2.
Servocontroller 5 is used for the servocontrol of the control of axial flow compressor static blade angle, TRT differential pressure power generation, positioning control and other relevant electrohydraulic control, and servocontroller 5 models are ESA-3E;
Under the control of electrohydraulic control 2, electrohydraulic control 2 can convert 4～20mA signal of servocontroller 5 outputs to hydraulic fluid flow rate and promote servo-cylinder 3 motions, the feedback signal of being sent by position transducer 6 constantly changes, until when equating with regulated signal, the hydraulic fluid flow rate signal of electrohydraulic control 2 outputs is 0, servo-cylinder 3 no longer moves, thereby drives the turbine engine stator blade, drive bypass valve soon and reach desired location, realizes the purpose of position regulation;
Function in electrohydraulic servo-controlling system is mainly that the rotating speed that to be applied in turbine installation be turbine engine is controlled, and the main object in rotating speed control is exactly the turbine installation stator blade, utilize the aperture of controlling stator blade to control the rotating speed of turbine engine, thereby reach the purpose that blast furnace top pressure is steadily controlled.The rotating speed control that is applied in electrohydraulic servo-controlling system is broadly divided into three processes:
1. boosting velocity procedure: system's starting condition all possess and unit without heavy trouble signal, after obtaining " allowing TRT to start " signal of electric " electric agreement startup " signal and blast furnace master-control room, confirm the pressure reducing valve of blast furnace group under automatically controlling and blast furnace top pressure and gas temperature are stabilized in processing range, unit possesses the raising speed condition.
2. speed regulation process: minute automatically control and manually control dual mode, control object is stator blade.
3. automatic raising speed: the realization of this process is by contrafunctional stator blade control time curve and speed setting climb curve are realized each other.When the deviation of the measured value that pushes up pressure and setting value surpassed 2Kpa, rotating speed did not allow to rise.Stator blade control time curve is the polygronal function in speed setting value and stator blade control time, with climb curve inverse function each other.Calculate certain stator blade control time according to current speed setting value, then according to this stator blade control time and climb curve, obtain next speed setting value.So circulation, realize the continuous increase of speed setting value.
4. manual raising speed: during the manual mode operation, the instruction of sending manual raising speed to system is controlled rotating speed by manual tune entrance hydraulic operated valve on system interface and the aperture of regulating stator blade.
5. automatic presynchronization process: when automatic sub-synchronous device drops into, and network process in, realize auto-parallel by the fine setting to rotating speed.When rotating speed was raised to 2850rpm, PLC sent automatic presynchronization and drops into signal.When only having rotating speed to be controlled at automated manner, automatic presynchronization just can work to the adjusting of rotating speed.Send the raising speed instruction in giving system after, automatic sub-synchronous device carries out lifting/lowering speed control system with ± 5rpm; When sending the raising speed instruction in there is no system, automatic presynchronization carries out lifting/lowering speed control system with ± 1rpm.
The electro-hydraulic servo control technology is widely used in the control system of blast-furnace top gas recovery energy recovery turbine electricity generating device, has fully given prominence to its good linearity, the dead band is little, highly sensitive, dynamic performance is good, the response remarkable advantage such as fast.Blast-furnace top gas recovery energy recovery turbine electricity generating device can reclaim the energy that accounts for required 30% left and right of blast furnace blower in normal operation, for iron and steel enterprise has created considerable economic benefit and social benefit.
Description of drawings:
Fig. 1 is blast-furnace top gas recovery energy recovery turbine electricity generating device electricity consumption liquid Servocontrol device structural principle simplified schematic diagram;
Fig. 2 is power oil system control block diagram.
Embodiment:
A kind of electro-hydraulic servo control device is used for blast-furnace top gas recovery energy recovery turbine electricity generating device; It is constructed as follows: hydraulic oil source 1, electrohydraulic control 2, servo-cylinder 3, oily handle mechanism 4, servocontroller 5, position transducer 6, hydraulic lock 7, valve plate 8, controller 9; Wherein: controller 9, servocontroller 5, electrohydraulic control 2, servo-cylinder 3, oily handle mechanism 4, valve plate 8 are linked in sequence successively; Hydraulic oil source 1 is connecting hydraulic lock 7, and both also is connected connection with electrohydraulic control; Position transducer 6 is connected with servocontroller 5, oily handle mechanism 4 respectively;
The electro-hydraulic servo control device is supplied to consist of electrohydraulic servo-controlling system by mechanical, electrical, liquid, and its controlling party block diagram as shown in Figure 1; By the command signal that controller 9 sends, compare with the actual position signal of servo-cylinder 3 in servocontroller 5, after becoming the signal amplification of error, send into electrohydraulic control 2.Electrohydraulic control 2 is transformed into current signal according to a certain percentage hydraulic pressure oil mass amount and promotes servo-cylinder 3 motions; The feedback signal of being sent by position transducer 6 constantly changes, until when command signal equates, servo-cylinder 3 stop motions; Servo-cylinder 3 is parked on the position of appointment, and the turbine generator stator blade is stabilized on certain aperture;
The straight line motion of servo-cylinder 3, be transformed into rotatablely moving of valve plate 8 or turbine generator stator blade by oily handle mechanism 4, change the work aperture of valve plate 8 or turbine generator stator blade; Along with the continuous variation of command signal, the aperture of turbine stator blade also will constantly change, and the variation by the stator blade aperture, reach the control revolution, control gas flow, control the exert oneself purpose of size of turbine.Its power oil system control graph as shown in Figure 2.
Servocontroller 5 is used for the servocontrol of the control of axial flow compressor static blade angle, TRT differential pressure power generation, positioning control and other relevant electrohydraulic control, and servocontroller 5 models are ESA-3E;
Under the control of electrohydraulic control 2, electrohydraulic control 2 can convert 4～20mA signal of servocontroller 5 outputs to hydraulic fluid flow rate and promote servo-cylinder 3 motions, the feedback signal of being sent by position transducer 6 constantly changes, until when equating with regulated signal, the hydraulic fluid flow rate signal of electrohydraulic control 2 outputs is 0, servo-cylinder 3 no longer moves, thereby drives the turbine engine stator blade, drive bypass valve soon and reach desired location, realizes the purpose of position regulation;
Function in electrohydraulic servo-controlling system is mainly that the rotating speed that to be applied in turbine installation be turbine engine is controlled, and the main object in rotating speed control is exactly the turbine installation stator blade, utilize the aperture of controlling stator blade to control the rotating speed of turbine engine, thereby reach the purpose that blast furnace top pressure is steadily controlled.The rotating speed control that is applied in electrohydraulic servo-controlling system is broadly divided into three processes:
1. boosting velocity procedure: system's starting condition all possess and unit without heavy trouble signal, after obtaining " allowing TRT to start " signal of electric " electric agreement startup " signal and blast furnace master-control room, confirm the pressure reducing valve of blast furnace group under automatically controlling and blast furnace top pressure and gas temperature are stabilized in processing range, unit possesses the raising speed condition.
2. speed regulation process: minute automatically control and manually control dual mode, control object is stator blade.
3. automatic raising speed: the realization of this process is by contrafunctional stator blade control time curve and speed setting climb curve are realized each other.When the deviation of the measured value that pushes up pressure and setting value surpassed 2Kpa, rotating speed did not allow to rise.Stator blade control time curve is the polygronal function in speed setting value and stator blade control time, with climb curve inverse function each other.Calculate certain stator blade control time according to current speed setting value, then according to this stator blade control time and climb curve, obtain next speed setting value.So circulation, realize the continuous increase of speed setting value.
4. manual raising speed: during the manual mode operation, the instruction of sending manual raising speed to system is controlled rotating speed by manual tune entrance hydraulic operated valve on system interface and the aperture of regulating stator blade.
5. automatic presynchronization process: when automatic sub-synchronous device drops into, and network process in, realize auto-parallel by the fine setting to rotating speed.When rotating speed was raised to 2850rpm, PLC sent automatic presynchronization and drops into signal.When only having rotating speed to be controlled at automated manner, automatic presynchronization just can work to the adjusting of rotating speed.Send the raising speed instruction in giving system after, automatic sub-synchronous device carries out lifting/lowering speed control system with ± 5rpm; When sending the raising speed instruction in there is no system, automatic presynchronization carries out lifting/lowering speed control system with ± 1rpm.
The electro-hydraulic servo control technology is widely used in the control system of blast-furnace top gas recovery energy recovery turbine electricity generating device, has fully given prominence to its good linearity, the dead band is little, highly sensitive, dynamic performance is good, the response remarkable advantage such as fast.Blast-furnace top gas recovery energy recovery turbine electricity generating device can reclaim the energy that accounts for required 30% left and right of blast furnace blower in normal operation, for iron and steel enterprise has created considerable economic benefit and social benefit.
Claims (2)
1. electro-hydraulic servo control device is used for blast-furnace top gas recovery energy recovery turbine electricity generating device; It is characterized in that: it is constructed as follows: hydraulic oil source (1), electrohydraulic control (2), servo-cylinder (3), oily handle mechanism (4), servocontroller (5), position transducer (6), hydraulic lock (7), valve plate (8), controller (9); Wherein: controller (9), servocontroller (5), electrohydraulic control (2), servo-cylinder (3), oily handle mechanism (4), valve plate (8) are linked in sequence successively; Hydraulic oil source (1) is connecting hydraulic lock (7), and both also is connected 2 with electrohydraulic control) connect; Position transducer (6) is connected with servocontroller (5), oily handle mechanism (4) respectively;
The electro-hydraulic servo control device supplies to consist of electrohydraulic servo-controlling system by mechanical, electrical, liquid; The command signal of being sent by controller (9), compare with the actual position signal of servo-cylinder (3) in servocontroller (5), after becoming the signal amplification of error, send into electrohydraulic control (2), electrohydraulic control (2) is transformed into current signal according to a certain percentage hydraulic pressure oil mass amount and promotes servo-cylinder (3) motion; The feedback signal of being sent by position transducer (6) constantly changes, until when command signal equates, servo-cylinder (3) stop motion; Servo-cylinder (3) is parked on the position of appointment, and the turbine generator stator blade is stabilized on certain aperture;
The straight line motion of servo-cylinder (3), be transformed into rotatablely moving of valve plate (8) or turbine generator stator blade by oily handle mechanism (4), change the work aperture of valve plate (8) or turbine generator stator blade; Along with the continuous variation of command signal, the aperture of turbine stator blade also will constantly change, and the variation by the stator blade aperture, reach the control revolution, control gas flow, control the exert oneself purpose of size of turbine.
2. according to the described electro-hydraulic servo control device of claim 1, it is characterized in that: servocontroller (5) model is ESA-3E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220593402 CN202970806U (en) | 2012-11-12 | 2012-11-12 | Electrohydraulic servo control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220593402 CN202970806U (en) | 2012-11-12 | 2012-11-12 | Electrohydraulic servo control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202970806U true CN202970806U (en) | 2013-06-05 |
Family
ID=48511893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220593402 Expired - Lifetime CN202970806U (en) | 2012-11-12 | 2012-11-12 | Electrohydraulic servo control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202970806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966386A (en) * | 2012-11-12 | 2013-03-13 | 国家电网公司 | Electro-hydraulic servo control device |
-
2012
- 2012-11-12 CN CN 201220593402 patent/CN202970806U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966386A (en) * | 2012-11-12 | 2013-03-13 | 国家电网公司 | Electro-hydraulic servo control device |
| CN102966386B (en) * | 2012-11-12 | 2016-06-08 | 国家电网公司 | A kind of electro-hydraulic servo control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108005795B (en) | Device and method for controlling angle of inlet guide vane of air compressor in real time | |
| CN202805719U (en) | Fine blanking machine alternating current servo fluid power system | |
| CN103291596B (en) | Compressor flow control system based on clearance is adjusted | |
| CN105422521A (en) | Hydraulic linear drive system based on control of servo pumps, and control method | |
| CN201650939U (en) | Hydraulic pressure control system of vacuum laminating machine | |
| CN202970806U (en) | Electrohydraulic servo control device | |
| CN109268079B (en) | Load control method of steam turbine in variable-frequency and rotational-speed-reduction process of SHRT unit | |
| CN102966386A (en) | Electro-hydraulic servo control device | |
| CN102814339A (en) | Rolling oil controlling system | |
| CN109322714B (en) | Load control method of steam turbine in variable-frequency rotation-speed-increasing process of SHRT unit | |
| CN103967859B (en) | Control the closed type hydraulic system that four-roll plate bending machine top roll stablizes rotation | |
| CN106337849A (en) | TRT machine static-blade direct-drive electro-hydraulic servo control system | |
| CN203110191U (en) | Roll spacing adjustment and safe disengagement hydraulic system for open mill | |
| CN201546765U (en) | Hydraulic servocontrol device for turbine of TRT | |
| CN215072102U (en) | Pump rotating speed regulating and controlling system based on permanent magnet regulation | |
| CN208651299U (en) | A kind of servo energy conservation power system of ceramic press | |
| CN205207295U (en) | Servo pump control hydraulic pressure straight line actuating system | |
| CN104265704A (en) | Lifting machine backpressure regulating loop | |
| CN202742481U (en) | Servo power system of ceramic brick machine | |
| CN202560451U (en) | Double-regulation electrical combination device for rotating propeller type water turbine | |
| CN204182882U (en) | Die-casting system | |
| CN203223343U (en) | Hydraulic turbine semi-barren liquor pump | |
| CN204914680U (en) | Hydraulic control device of servo press of force control | |
| CN210033540U (en) | Steam turbine regulating valve servo control device | |
| CN204061418U (en) | The energy-saving control device of hydraulic station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20160608 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |