CN107587945B - Gas turbine temperature control equipment - Google Patents
Gas turbine temperature control equipment Download PDFInfo
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- CN107587945B CN107587945B CN201710785330.XA CN201710785330A CN107587945B CN 107587945 B CN107587945 B CN 107587945B CN 201710785330 A CN201710785330 A CN 201710785330A CN 107587945 B CN107587945 B CN 107587945B
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Abstract
The invention discloses a kind of gas turbine temperature control equipments, including temperature sensor, temperature controller and oil return executing agency, temperature sensor is installed on the exhaust ports of the combustion chamber of gas turbine, oil return executing agency is installed on the oil return line of chamber front end, wherein, temperature sensor, the delivery temperature of the exhaust outlet of the combustion chamber for detecting gas turbine；Temperature controller, it is connected with temperature sensor and oil return executing agency, delivery temperature for the detection of temperature collection sensor, and the movement of oil return executing agency is controlled according to the delivery temperature of acquisition, fuel oil is set to pass through oil return executing agency oil return to fuel tank, to reduce the amount of fuel for entering fuel regulator, the output power of gas turbine is reduced, delivery temperature is limited.Gas turbine temperature control equipment provided by the invention, delivery temperature control effect is good, high reliablity.
Description
Technical field
The present invention relates to gas turbine control fields, particularly, are related to a kind of gas turbine temperature control equipment.
Background technique
Currently, the fuel oil control of gas turbine is still largely controlled using mechanical hydraulic-pressure type adjuster.The output of gas turbine
There are following relationships with delivery temperature for power: under conditions of gas turbine energy transfer efficiency is certain, the output of gas turbine
While power (available power) increases, useless power is consequently increased, and useless power is then converted into thermal energy power with tail gas
Discharge, it can the output power for being equivalent to gas turbine increases with delivery temperature and increased.Gas turbine starts and is accelerating
In the process, accelerator open degree is increased by manipulation throttle lever, to obtain higher output power, but with the same of output power raising
When, also improve delivery temperature.And excessively high delivery temperature will affect the efficiency of gas turbine, even result in its damage.Therefore it sets
It sets maximum temperature limitation to be necessary, and artificial manipulation Thrust Level Angel is relied on to control the oil mass for entering fuel regulator, then root
The method that the limitation of temperature is exhausted according to the display of delivery temperature dial gauge easily causes the overtemperature of gas turbine.
Therefore, the overtemperature of gas turbine is easily caused when limiting delivery temperature using mechanical hydraulic-pressure type adjuster, be one urgently
Technical problem to be solved.
Summary of the invention
The present invention provides a kind of gas turbine temperature control equipments, to solve using mechanical hydraulic-pressure type adjuster limitation row
The technical issues of overtemperature of gas turbine is easily caused when temperature is spent.
The technical solution adopted by the invention is as follows:
The present invention provides a kind of gas turbine temperature control equipment, including temperature sensor, temperature controller and oil return are held
Row mechanism, temperature sensor is installed on the exhaust ports of the combustion chamber of gas turbine, before oil return executing agency is installed on combustion chamber
On the oil return line at end, wherein temperature sensor, the delivery temperature of the exhaust outlet of the combustion chamber for detecting gas turbine；Temperature
Controller is spent, is connected with temperature sensor and oil return executing agency, for the delivery temperature that temperature collection sensor acquires, and root
According to the delivery temperature control oil return executing agency movement of acquisition, make fuel oil by oil return executing agency oil return to fuel tank, to reduce
Into the amount of fuel of fuel regulator, the output power of gas turbine is reduced, limits delivery temperature.
Further, gas turbine temperature control equipment further includes overtemperature malfunction indicator lamp,
Temperature controller is connected with overtemperature malfunction indicator lamp, if for detect oil return executing agency execution movement after,
Delivery temperature still rises, then exports overtemperature fault-signal, lights overtemperature malfunction indicator lamp, to prompt overtemperature to stop.
Further, gas turbine temperature control equipment further includes temperature sensor fault indicator light,
Temperature controller is connected with temperature sensor fault indicator light, if for detecting that temperature sensor disconnects or anti-
When connecing, then output temperature sensor fault-signal, lights temperature sensor fault indicator light.
Further, temperature sensor is thermocouple, and oil return executing agency is solenoid valve.
Further, temperature controller includes shell, electric connector, cable and control circuit board, and electric connector is set to
Outside shell, cable and control circuit board are set in shell, and cable connection is between electric connector and control circuit board, electrical connection
Device is for connecting temperature sensor, oil return executing agency, overtemperature malfunction indicator lamp and temperature sensor fault indicator light, control electricity
Road plate is for controlling temperature sensor, oil return executing agency, overtemperature malfunction indicator lamp and temperature sensor fault indicator light
System.
Further, control circuit board includes thermocouple amplifying circuit, clamping protective circuit, analog to digital conversion circuit, master control
Device and solenoid valve execution circuit processed,
Thermocouple amplifying circuit, connect with thermocouple, the millivolt level electricity generated when for thermocouple to be detected delivery temperature
Pressure signal is enlarged into analog signals；
Clamping protective circuit is connected with thermocouple amplifying circuit, for the amplified analog quantity of thermocouple amplifying circuit
Signal carries out voltage-limiting protection；
Analog to digital conversion circuit is connected with clamping protective circuit, for by the analog signals after clamping protective circuit pressure limiting
Be converted to digital quantity signal；
Master controller is connected, after converting analog to digital conversion circuit with analog to digital conversion circuit and solenoid valve execution circuit
Digital quantity signal calculated, output pwm signal control solenoid valve execution circuit drive magnetic valve be opened or closed valve, with
Control regurgitant volume.
Further, solenoid valve execution circuit is power amplification circuit, and the pwm signal for exporting master controller carries out
Amplification, drive magnetic valve is opened or closed valve within the period of setting.
Further, thermocouple amplifying circuit includes amplifier and disconnected even biasing circuit, and control circuit board further includes disconnected even
Indicating circuit,
Amplifier is connected, for when connecting correct with thermocouple, thermocouple to be examined with thermocouple and disconnected even biasing circuit
The millivolt magnitude voltage signals generated when surveying delivery temperature amplify, and export a positive voltage signal；Be also used to thermocouple
When being reversely connected or not connecing, a negative voltage signal is exported as even indication signal is prejudged and is conveyed to disconnected even indicating circuit；
Disconnected idol indicating circuit, is connected with amplifier and master controller, prejudges even indication signal for export amplifier
Master controller is conveyed to after being converted into TTL format signal；
Master controller is connected with disconnected even indicating circuit, the electricity of the TTL format signal for detecting disconnected even indicating circuit conveying
Flat height exports thermocouple fault-signal, lights temperature sensor fault indicator light if TTL format signal is low level；If
When TTL format signal is high level, extinguish temperature sensor fault indicator light.
Further, thermocouple amplifying circuit further includes cold junction compensation circuit,
Cold junction compensation circuit, is connected with amplifier, provides ambient temperature compensation for thermoelectric couple amplifying circuit.
Further, control circuit board further includes current sampling circuit, and gas turbine temperature control equipment further includes electromagnetism
Valve malfunction indicator lamp,
Current sampling circuit is connected with solenoid valve execution circuit and temperature controller, for believing electromagnetic valve driving current
Number voltage detection signal is converted and be enlarged into, and voltage detection signal is compared with the voltage threshold of setting, if voltage is examined
Survey signal and be higher than voltage threshold, then illustrate that driving current is excessive, output overcurrent signal to master controller,
Master controller is connected with solenoid valve failure indicator light, if the overcurrent sended over for receiving current sampling circuit
After signal, output solenoid valve fault-signal gives solenoid valve failure indicator light, lights solenoid valve failure indicator light.
The invention has the following advantages:
Gas turbine temperature control equipment provided by the invention is executed using temperature sensor, temperature controller and oil return
Mechanism, the delivery temperature of temperature controller temperature collection sensor detection, and oil return is controlled according to the delivery temperature of acquisition and is executed
Mechanism action makes fuel oil by oil return executing agency oil return to fuel tank, to be controlled by control recirculating oil quantity into fuel oil tune
The amount of fuel of device is saved, to effectively limit the excessive discharge temperature of gas turbine.Gas turbine temperature control provided by the invention
Device processed, delivery temperature control effect is good, high reliablity.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the functional block diagram of gas turbine temperature control equipment preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of temperature controller in Fig. 1；
Fig. 3 is the functional block diagram of control circuit board in Fig. 2；
Fig. 4 is the functional block diagram of gas turbine temperature control equipment preferred embodiment of the present invention.
Drawing reference numeral explanation:
10, temperature sensor；20, temperature controller；30, oil return executing agency；40, overtemperature malfunction indicator lamp；50, temperature
Sensor fault indicator light；21, shell；22, electric connector；23, cable；24, control circuit board；241, thermocouple amplification electricity
Road；242, clamping protective circuit；243, analog to digital conversion circuit；244, master controller；245, solenoid valve execution circuit；2411, it puts
Big device；2412, break even biasing circuit；2413, cold junction compensation circuit；246, break even indicating circuit；247, current sample
Circuit；60, solenoid valve failure indicator light；100, oil return pipe；200, fuel regulator；300, combustion chamber.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to Fig.1, the preferred embodiment of the present invention provides a kind of gas turbine temperature control equipment, including temperature sensing
Device 10, temperature controller 20 and oil return executing agency 30, temperature sensor 10 are installed on the exhaust of the combustion chamber 300 of gas turbine
At mouthful (before Gas Turbine Power turbine), oil return executing agency 30 is installed on time that 300 front end of combustion chamber is communicated with oil return pipe 100
On oil pipe line, wherein temperature sensor 10, the delivery temperature of the exhaust outlet of the combustion chamber 300 for detecting gas turbine；Temperature
Controller 20 is connected with temperature sensor 10 and oil return executing agency 30, the exhaust temperature detected for temperature collection sensor 10
Degree, and oil return executing agency 30 is controlled according to the delivery temperature of acquisition and is acted, so that fuel oil is passed through 30 oil return of oil return executing agency extremely
Fuel tank reduces the output power of gas turbine to reduce the amount of fuel for entering fuel regulator 200, to reach limitation exhaust
The purpose of temperature.Wherein, temperature sensor 10 can be thermal resistance sensor or thermocouple sensor.Thermocouple sensor is K
Type thermocouple sensor or S type thermocouple sensor.Oil return executing agency 30 can be solenoid valve, or motor-driven valve,
Within the protection scope of this patent.
Gas turbine temperature control equipment provided in this embodiment, is held using temperature sensor, temperature controller and oil return
Row mechanism, the delivery temperature of temperature controller temperature collection sensor detection, and oil return is controlled according to the delivery temperature of acquisition and is held
Row mechanism action makes fuel oil by oil return executing agency oil return to fuel tank, to be controlled by control recirculating oil quantity into fuel oil
The amount of fuel of adjuster, to effectively limit the excessive discharge temperature of gas turbine.Gas turbine temperature provided in this embodiment
Control device is spent, delivery temperature control effect is good, high reliablity.
Preferably, as shown in Fig. 2, gas turbine temperature control equipment provided in this embodiment, further includes that overtemperature failure refers to
Show lamp 40, wherein temperature controller 20 is connected with overtemperature malfunction indicator lamp 40, if for detecting that oil return executing agency 30 exists
After execution movement, delivery temperature still rises, then exports overtemperature fault-signal, lights overtemperature malfunction indicator lamp 40, super to prompt
Temperature parking.In the present embodiment, if being unable to control delivery temperature after adjusting, delivery temperature still rises, then temperature controller 20
Overtemperature malfunction indicator lamp 40 is lighted, to prompt operator to stop.
Gas turbine temperature control equipment provided in this embodiment reminds operator to stop by overtemperature malfunction indicator lamp
Vehicle, to guarantee the safety of gas turbine.
Preferably, as shown in Fig. 2, gas turbine temperature control equipment provided in this embodiment, further includes temperature sensor
Malfunction indicator lamp 50, wherein temperature controller 20 is connected with temperature sensor fault indicator light 50, if for detecting temperature
When sensor 10 disconnects or is reversely connected, then output temperature sensor fault-signal, lights temperature sensor fault indicator light 50.At this
In embodiment, by 50 automatic detection for temperature sensor fault of temperature sensor fault indicator light, to warn operator.
Gas turbine temperature control equipment provided in this embodiment warns operator by temperature sensor fault indicator light
Member, to guarantee the safety of gas turbine.
Preferably, as shown in figure 3, gas turbine temperature control equipment provided in this embodiment, temperature controller 20 include
Shell 21, electric connector 22, cable 23 and control circuit board 24, electric connector 22 are set to outside shell 21, cable 23 and control
Circuit board 24 is set in shell 21, and cable 23 is connected between electric connector 22 and control circuit board 24, and electric connector 22 is used
In connection temperature sensor 10, oil return executing agency 30, overtemperature malfunction indicator lamp 40 and temperature sensor fault indicator light 50, control
Circuit board 24 processed is used for temperature sensor 10, oil return executing agency 30, overtemperature malfunction indicator lamp 40 and temperature sensor fault
Indicator light 50 is controlled.
Gas turbine temperature control equipment provided in this embodiment, temperature controller structure is simple, delivery temperature control effect
Fruit is good, high reliablity.
Specifically, as shown in figure 4, gas turbine temperature control equipment provided in this embodiment, control circuit board 24 include
Thermocouple amplifying circuit 241, clamping protective circuit 242, analog to digital conversion circuit 243, master controller 244 and solenoid valve execution circuit
245, wherein thermocouple amplifying circuit 241 is connect with thermocouple, the millivolt generated when for thermocouple to be detected delivery temperature
Magnitude voltage signals are enlarged into analog signals；Clamping protective circuit 242 is connected with thermocouple amplifying circuit 241, for thermoelectricity
The amplified analog signals of even amplifying circuit 241 carry out voltage-limiting protection；Analog to digital conversion circuit 243, with clamping protective circuit 242
It is connected, for the analog signals after 242 pressure limiting of clamping protective circuit to be converted to digital quantity signal；Master controller 244, with mould
Number conversion circuit 243 is connected with solenoid valve execution circuit 245, for the digital quantity signal after converting analog to digital conversion circuit 243
It is calculated, output pwm signal control 245 drive magnetic valve of solenoid valve execution circuit is opened or closed valve, to control reflux
Amount.In the present embodiment, gas turbine temperature control equipment use 28 volts of power supply power supplies, by DC converter generation ± 15V,
+ 5V totally three road voltage, then+5V voltage is adjusted to+3.3V by voltage-stablizer, to supply each circuit, in the present embodiment, thermoelectricity
Even to select K-type electroheat pair, master controller 244 uses single-chip microcontroller.
See Fig. 4, gas turbine temperature control equipment provided in this embodiment, working principle is as follows:
K-type electroheat pair detects the delivery temperature of the exhaust outlet of the combustion chamber of gas turbine, will generate millivolt magnitude voltage signals
It is conveyed to thermocouple amplifying circuit 241, thermocouple amplifying circuit 241 becomes simulation after millivolt magnitude voltage signals are amplified 100 times
It measures signal and subsequently into clamping protective circuit 242 analog signals is carried out voltage-limiting protection, analog signals are limited in-
In 0.7V~+5.7V.It is re-fed into analog to digital conversion circuit 243 and carries out analog-to-digital conversion, analog signals are converted into digital quantity signal,
The transformation result of analog to digital conversion circuit 243 sends single-chip microcontroller to by spi bus, is counted by single-chip microcontroller according to transformation result
It calculates, output pwm signal controls solenoid valve execution circuit 245, opening and closing for solenoid valve is controlled, to control recirculating oil quantity, thus
Achieve the purpose that control temperature.If temperature is uncontrolled, lighting overtemperature malfunction indicator lamp 40 prompts operator's parking.
Gas turbine temperature control equipment provided in this embodiment, by by thermocouple amplifying circuit, clamping protective circuit,
Analog to digital conversion circuit, master controller and solenoid valve execution circuit are integrated in control circuit board, and structure is simple, occupy temperature control
The space of device is small.And voltage-limiting protection is carried out to the amplified analog signals of thermocouple amplifying circuit using clamping protective circuit,
To avoid damage late-class circuit.
Referring to fig. 4, gas turbine temperature control equipment provided in this embodiment, solenoid valve execution circuit 245 are put for power
Big circuit, the pwm signal for exporting master controller 244 amplify, within the period of setting drive magnetic valve open or
Close valve.Specifically, if the pwm signal period is T, duty ratio D, when being of T*D that solenoid valve controls in the period at one
It is interior to open, it is to close in the time of T* (1-D).In the present embodiment, solenoid valve control is single-chip microcontroller according to, modulus
For the transformation result of conversion circuit come what is controlled, transformation result can accurately reflect delivery temperature.When transformation result is less than first
When threshold value, the pwm signal that single-chip microcontroller output duty cycle is 5% controls solenoid valve execution circuit 245, to make solenoid valve at this
It is opened in time in 5%, remaining time is to close, and the service time of solenoid valve is seldom at this time, recirculating oil quantity very little, no
Limit delivery temperature；When transformation result is greater than first threshold and is less than second threshold, the service time of solenoid valve is with Change-over knot
Fruit increases and increases, i.e. recirculating oil quantity increases with transformation result, further increases to limit delivery temperature, keeps delivery temperature steady
It is scheduled in first threshold；When transformation result is greater than second threshold and is less than third threshold value, the service time of solenoid valve is most at this time
Greatly, 95% constant, further limitation delivery temperature raising is maintained；When transformation result is greater than third threshold value, illustrate exhaust temperature
Degree is uncontrolled, and it is constant that the service time of solenoid valve maintains 95%, while exporting overtemperature fault-signal, lights overtemperature failure and refers to
Show lamp 50.
Further, see Fig. 4, gas turbine temperature control equipment provided in this embodiment, thermocouple amplifying circuit 241
It further include breaking including amplifier 2411, disconnected even biasing circuit 2412 and cold junction compensation circuit 2413, control circuit board 24
Even indicating circuit 246, amplifier 2411 are connected, for connecting just with thermocouple with thermocouple and disconnected even biasing circuit 2412
When true, the millivolt magnitude voltage signals generated when thermocouple is detected delivery temperature are amplified, and export a positive voltage signal；Also
Disconnected even instruction is conveyed to for when being reversely connected or not connecing with thermocouple, exporting a negative voltage signal as even indication signal is prejudged
Circuit 246；Disconnected idol indicating circuit 246, is connected, for export amplifier 2411 with amplifier 2411 and master controller 244
Prejudge after even indication signal is converted into TTL format signal and is conveyed to master controller 244；Master controller 244, with disconnected even indicating circuit
246 are connected, for detecting the level height for the TTL format signal that disconnected even indicating circuit 246 conveys, if TTL format signal is low
When level, thermocouple fault-signal is exported, temperature sensor fault indicator light 50 is lighted；If TTL format signal is high level,
Extinguish temperature sensor fault indicator light 50.Cold junction compensation circuit 2413 is connected with amplifier 2411, is used for thermoelectric
Even amplifying circuit 241 provides ambient temperature compensation.
Gas turbine temperature control equipment provided in this embodiment, thermocouple amplifying circuit 241 include amplifier 2411, break
Even biasing circuit 2412, cold junction compensation circuit 2413.The cathode of thermocouple is connect with the reverse side of amplifier 2411, heat
Galvanic couple plus earth, the amplification factor of amplifier 2411 are 100 times, export a positive voltage signal；Disconnected idol biasing circuit 2412
It is placed in the reverse side of amplifier 2411, when thermocouple is reversely connected or when not connecing, amplifier 2411 exports a negative voltage, as prejudging
Even indication signal is conveyed to disconnected even indicating circuit 246；Disconnected idol indicating circuit 246 is a hysteresis comparator, will prejudge even instruction
Signal is converted into TTL format signal, gives single-chip microcontroller.The TTL format signal is high electricity under normal condition (without disconnected even failure)
It is flat, disconnected even failure Shi Zewei low level occurs.If single-chip microcontroller detects that the TTL format signal is low level, thermocouple is exported
Fault-signal lights temperature sensor fault indicator light, conversely, then extinguishing temperature sensor fault indicator light.Thermocouple cold junction
2413 thermoelectric couple amplifying circuit 241 of compensation circuit provides ambient temperature compensation, keeps the output of heat pipe-thermocouple amplifying circuit 241 quasi-
Really reflection temperature value of the thermocouple with respect to 0 DEG C.
Preferably, referring to fig. 4, gas turbine temperature control equipment provided in this embodiment, control circuit board 24 further include
Current sampling circuit 247, gas turbine temperature control equipment further include solenoid valve failure indicator light 60, wherein current sample electricity
Road 247 is connected with solenoid valve execution circuit 245 and temperature controller 20, for converting and putting electromagnetic valve driving current signal
Greatly voltage detection signal, and voltage detection signal is compared with the voltage threshold of setting, if voltage detection signal is higher than
Voltage threshold then illustrates that driving current is excessive, and output overcurrent signal is to master controller 244, master controller 244, with solenoid valve event
Hinder indicator light 60 to be connected, if after for receiving the over-current signal that current sampling circuit 247 sends over, output solenoid valve failure letter
Number give solenoid valve failure indicator light 60, light solenoid valve failure indicator light 60.
Gas turbine temperature control equipment provided in this embodiment, the driving current signal of solenoid valve is by current sampling circuit
247 conversions are enlarged into voltage detection signal, and voltage detection signal is compared with voltage threshold, if being higher than the voltage threshold,
Illustrating that electric current is excessive, output overcurrent signal to single-chip microcontroller after single-chip microcontroller receives the stream signal, carries out software filtering and judgement,
And output solenoid valve fault-signal, light solenoid valve failure indicator light 60.
Gas turbine temperature control equipment provided in this embodiment is adjusted by controlling recirculating oil quantity to control into fuel oil
The amount of fuel of device, to effectively limit excessive discharge temperature.When gas turbine breaks down, pass through apparent indicating fault
Lamp warns operator, guarantees the safety of gas turbine.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of gas turbine temperature control equipment, which is characterized in that including temperature sensor (10), temperature controller (20) and
Oil return executing agency (30), wherein
The temperature sensor (10), the delivery temperature of the exhaust outlet of the combustion chamber for detecting gas turbine；
The temperature controller (20), is connected, for adopting with the temperature sensor (10) and the oil return executing agency (30)
Collect the delivery temperature of the temperature sensor (10) detection, and the oil return is controlled according to the delivery temperature of acquisition and is held
Row mechanism (30) movement, makes fuel oil by oil return executing agency (30) oil return to fuel tank, enters fuel regulator to reduce
Amount of fuel, reduce the output power of the gas turbine, limit the delivery temperature；
The gas turbine temperature control equipment further includes overtemperature malfunction indicator lamp (40),
The temperature controller (20) is connected with the overtemperature malfunction indicator lamp (40), if for detecting that the oil return executes
After executing the movement, the delivery temperature still rises, then exports overtemperature fault-signal, lights the overtemperature for mechanism (30)
Malfunction indicator lamp (40), to prompt overtemperature to stop；
The gas turbine temperature control equipment further includes temperature sensor fault indicator light (50),
The temperature controller (20) is connected, if for detecting the temperature with the temperature sensor fault indicator light (50)
When spending sensor (10) disconnection or reversal connection, then output temperature sensor fault-signal, lights the temperature sensor fault instruction
Lamp (50)；
The temperature sensor (10) is thermocouple, and the oil return executing agency (30) is solenoid valve；
The temperature controller (20) includes shell (21), electric connector (22), cable (23) and control circuit board (24), described
Electric connector (22) is set to the shell (21) outside, and the cable (23) and the control circuit board (24) are set to the shell
In body (21), the cable (23) is connected between the electric connector (22) and the control circuit board (24), described to be electrically connected
Device (22) are connect for connecting the temperature sensor (10), the oil return executing agency (30), the overtemperature malfunction indicator lamp
(40) it is used for the temperature sensor fault indicator light (50), the control circuit board (24) to the temperature sensor
(10), the oil return executing agency (30), the overtemperature malfunction indicator lamp (40) and the temperature sensor fault indicator light
(50) it is controlled；
The control circuit board (24) includes thermocouple amplifying circuit (241), clamping protective circuit (242), analog to digital conversion circuit
(243), master controller (244) and solenoid valve execution circuit (245),
The thermocouple amplifying circuit (241), connect with the thermocouple, for the thermocouple to be detected the delivery temperature
When the millivolt magnitude voltage signals that generate be enlarged into analog signals；
The clamping protective circuit (242) is connected with the thermocouple amplifying circuit (241), for amplifying to the thermocouple
The amplified analog signals of circuit (241) carry out voltage-limiting protection；
Analog-digital conversion circuit as described (243) is connected with the clamping protective circuit (242), is used for the clamping protective circuit
(242) analog signals after pressure limiting are converted to digital quantity signal；
The master controller (244), is connected with analog-digital conversion circuit as described (243) and the solenoid valve execution circuit (245), uses
It is calculated in by the digital quantity signal after analog-digital conversion circuit as described (243) conversion, output pwm signal controls the electricity
Magnet valve execution circuit (245) drives the solenoid valve to be opened or closed valve, to control regurgitant volume；
The thermocouple amplifying circuit (241) includes amplifier (2411) and disconnected even biasing circuit (2412), the control circuit
Plate (24) further includes disconnected even indicating circuit (246),
The amplifier (2411) is connected with the thermocouple and the disconnected even biasing circuit (2412), be used for the heat
When galvanic couple connection is correct, the millivolt magnitude voltage signals generated when the thermocouple is detected the delivery temperature are amplified, defeated
A positive voltage signal out；It is also used to when being reversely connected or not connecing with the thermocouple, exports a negative voltage signal and be used as and prejudge
Even indication signal is conveyed to the disconnected even indicating circuit (246)；
The disconnected even indicating circuit (246), is connected with the amplifier (2411) and the master controller (244), is used for institute
State amplifier (2411) output it is described prejudge after even indication signal is converted into TTL format signal be conveyed to the master controller
(244)；
The master controller (244) is connected with the disconnected even indicating circuit (246), for detecting the disconnected even indicating circuit
(246) the level height of the TTL format signal conveyed exports thermocouple event if the TTL format signal is low level
Hinder signal, lights the temperature sensor fault indicator light (50)；If the TTL format signal be high level, extinguish described in
Temperature sensor fault indicator light (50).
2. gas turbine temperature control equipment according to claim 1, which is characterized in that
The solenoid valve execution circuit (245) is power amplification circuit, described for exporting the master controller (244)
Pwm signal amplifies, and the solenoid valve is driven to be opened or closed valve within the period of setting.
3. gas turbine temperature control equipment according to claim 1, which is characterized in that
The thermocouple amplifying circuit (241) further includes cold junction compensation circuit (2413),
The cold junction compensation circuit (2413), is connected with the amplifier (2411), for amplifying to the thermocouple
Circuit (241) provides ambient temperature compensation.
4. gas turbine temperature control equipment according to claim 1, which is characterized in that
The control circuit board (24) further includes current sampling circuit (247), and gas turbine temperature control equipment further includes electromagnetism
Valve malfunction indicator lamp (60),
The current sampling circuit (247), is connected with solenoid valve execution circuit (245) and the temperature controller (20), is used for
The electromagnetic valve driving current signal is converted and is enlarged into voltage detection signal, and by the voltage detection signal and setting
Voltage threshold is compared, if the voltage detection signal is higher than the voltage threshold, is illustrated that driving current is excessive, was exported
Stream signal gives the master controller (244),
The master controller (244) is connected with the solenoid valve failure indicator light (60), if for receiving the current sample electricity
After the over-current signal that road (247) sends over, output solenoid valve fault-signal gives the solenoid valve failure indicator light (60),
Light the solenoid valve failure indicator light (60).
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| CN201710785330.XA CN107587945B (en) | 2017-09-04 | 2017-09-04 | Gas turbine temperature control equipment |
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| CN201710785330.XA CN107587945B (en) | 2017-09-04 | 2017-09-04 | Gas turbine temperature control equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108334133A (en) * | 2018-03-28 | 2018-07-27 | 中国船舶重工集团公司第七O三研究所无锡分部 | A kind of gas turbine pulse temperature control device |
| CN109412542B (en) * | 2018-12-10 | 2022-11-04 | 中国航发南方工业有限公司 | Pressure signal conditioning circuit and electronic controller |
| CN112286098B (en) * | 2020-10-29 | 2022-08-26 | 中国航发南方工业有限公司 | Conversion board subassembly, gas turbine generating set's digital electronic control device |
| CN112729579B (en) * | 2020-12-21 | 2023-09-26 | 中国兵器装备集团自动化研究所有限公司 | Multichannel isolated thermocouple temperature measurement system |
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