CN214063080U - Automatic input control system for steam turbine turning gear - Google Patents
Automatic input control system for steam turbine turning gear Download PDFInfo
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- CN214063080U CN214063080U CN202023008290.4U CN202023008290U CN214063080U CN 214063080 U CN214063080 U CN 214063080U CN 202023008290 U CN202023008290 U CN 202023008290U CN 214063080 U CN214063080 U CN 214063080U
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Abstract
The utility model discloses a steam turbine barring automatic input control system, when an upper computer detects that a steam turbine rotor is changed from running to stopping, a pulse starting signal is sent, a barring preparation control circuit is started to start a frequency converter to enter a barring preparation state; and meanwhile, when the upper computer detects that the steam turbine rotor is changed from running to stopping, a pulse starting signal is sent, the turning gear meshing control circuit is started to be connected with the frequency converter to control the low-speed running of the turning gear motor, the turning gear meshing control circuit is simultaneously connected with the turning gear engaging electromagnetic valve to connect the lubricating oil path and drive the engaging link mechanism to act, if the turning gear meshing detection circuit detects that the turning gear is normally meshed with the steam turbine rotor gear, the turning gear meshing control circuit is disconnected, a feedback signal that the turning gear is normally meshed with the steam turbine rotor gear is sent to the upper computer, and the upper computer sends the pulse starting signal to the turning gear running control circuit to start the frequency converter to control the turning gear motor to run at the turning rated speed.
Description
Technical Field
The utility model relates to a steam turbine barring input control equipment technical field specifically is an automatic input control system of steam turbine barring.
Background
The turning system consists of a motor and a meshing transmission mechanism and has the function that the turning system is put into operation after the steam turbine is stopped from operation, so that the rotor can run at a low speed. When the temperature of the cylinder of the steam turbine is less than a certain value (generally 100 ℃), the turning-up can be stopped. The traditional jigger needs manual investment, and a jigger meshing process is adopted, wherein in the investment process, a driving gear of the jigger is connected with a rotor through a set of meshing mechanism. At the in-process of meshing, operating personnel is through turning disc car motor with the hand to drive gear and rotate, at the in-process of turning disc car motor, need under the effect of oil pressure, drive gear will be with the meshing mechanism combination, this process, popular saying is exactly that the barring puts into gear, and the defect that the manual input barring lies in that there is the people on duty, and the operation is inconvenient, is unfavorable for practicing thrift the human cost.
Disclosure of Invention
An object of the utility model is to provide a convenient operation's automatic input control system of steam turbine barring.
The utility model discloses a steam turbine barring automatic input control system, including converter and host computer, the converter is connected with barring preparation control circuit, barring meshing control circuit and barring operation control circuit respectively, barring preparation control circuit is connected with converter self-checking circuit, barring meshing control circuit is connected with barring meshing detection circuit;
the frequency converter self-checking circuit detects whether the frequency converter is normal, if the frequency converter is normal, when the upper computer detects that the operation of the turbine rotor is changed into stop, a pulse starting signal is sent, and the turning preparation control circuit is started to start the frequency converter to enter a turning preparation state; and meanwhile, when the upper computer detects that the turbine rotor is changed from running to stopping, a pulse starting signal is sent, the turning gear meshing control circuit is started to be connected with the frequency converter to control the low-speed running of the turning gear motor, the turning gear meshing control circuit is simultaneously connected with the turning gear engaging electromagnetic valve to connect the lubricating oil circuit and drive the engaging link mechanism to act, if the turning gear meshing detection circuit detects that the turning gear is normally meshed with the turbine rotor gear, the turning gear meshing control circuit is disconnected, a feedback signal that the turning gear is normally meshed with the turbine rotor gear is sent to the upper computer, and the upper computer sends the pulse starting signal to the turning gear running control circuit to start the frequency converter to control the turning gear motor to run at the turning rated speed according to the feedback signal that the turning gear is normally meshed with the turbine rotor gear.
The automatic starting control system for the steam turbine barring is characterized in that when the upper computer detects that a steam turbine rotor is stopped from running, a pulse starting signal is sent, and a barring preparation control circuit is started to start a frequency converter to enter a barring preparation state; meanwhile, when the upper computer detects that the steam turbine rotor is changed from running to stopping, a pulse starting signal is sent, the turning gear meshing control circuit is started to be connected with the frequency converter to control the low-speed running of the turning gear motor, the turning gear meshing control circuit is simultaneously connected with the turning gear engaging electromagnetic valve to connect the lubricating oil circuit and drive the engaging link mechanism to act, if the turning gear meshing detection circuit detects that the turning gear is normally meshed with the steam turbine rotor gear, the turning gear meshing control circuit is disconnected, a feedback signal that the turning gear is normally meshed with the steam turbine rotor gear is sent to the upper computer, the upper computer sends a pulse starting signal to start the frequency converter to control the turning gear motor to enter the turning gear rated speed to run according to the feedback signal that the turning gear is normally meshed with the steam turbine rotor gear, the turning gear motor can be automatically controlled to enter the turning gear, and therefore unattended operation is realized, thereby saving the labor cost.
Drawings
FIG. 1 is a schematic diagram of the wiring of the frequency conversion loop of the barring motor of the present invention;
FIG. 2 is a schematic diagram of the wiring of the barring motor control circuit of the present invention;
fig. 3 is the utility model discloses barring gear engaging solenoid valve return circuit wiring schematic diagram.
Detailed Description
As shown in fig. 1, 2 and 3, an automatic input control system for a steam turbine turning gear comprises a frequency converter and an upper computer, wherein the frequency converter is respectively connected with a turning gear preparation control circuit, a turning gear engagement control circuit and a turning gear operation control circuit, the turning gear preparation control circuit is connected with a frequency converter self-checking circuit, and the turning gear engagement control circuit is connected with a turning gear engagement detection circuit;
the frequency converter self-checking circuit detects whether the frequency converter is normal, if the frequency converter is normal, when the upper computer detects that the operation of the turbine rotor is changed into stop, a pulse starting signal is sent, and the turning preparation control circuit is started to start the frequency converter to enter a turning preparation state; and meanwhile, when the upper computer detects that the turbine rotor is changed from running to stopping, a pulse starting signal is sent, the turning gear meshing control circuit is started to be connected with the frequency converter to control the low-speed running of the turning gear motor, the turning gear meshing control circuit is simultaneously connected with the turning gear engaging electromagnetic valve to connect the lubricating oil circuit and drive the engaging link mechanism to act, if the turning gear meshing detection circuit detects that the turning gear is normally meshed with the turbine rotor gear, the turning gear meshing control circuit is disconnected, a feedback signal that the turning gear is normally meshed with the turbine rotor gear is sent to the upper computer, and the upper computer sends the pulse starting signal to the turning gear running control circuit to start the frequency converter to control the turning gear motor to run at the turning rated speed according to the feedback signal that the turning gear is normally meshed with the turbine rotor gear.
Be provided with auxiliary relay KA2 on the converter self-checking circuit, converter malfunction alerting switch CK one end is connected to auxiliary relay KA 2's coil one end, and live wire is connected to converter malfunction alerting switch CK one end, and the zero line is connected to auxiliary relay KA 2's the other end, live wire is connected to auxiliary relay KA 2's normally open contact one end, and control circuit is prepared to the other end connection barring.
Control circuit is prepared to rolling stock is provided with auxiliary relay KA3, auxiliary relay KA 3's coil one end is connected host computer pulse start normally open contact DCS2 one end and auxiliary relay KA 3's first normally open contact one end, and the normally open contact of auxiliary relay KA2 is all connected to the other end of host computer pulse start normally open contact DCS2 and the other end of the first normally open contact of auxiliary relay KA3, and the control end is prepared to rolling stock of converter is connected to auxiliary relay KA 3's second normally open contact.
The jigger engagement detection circuit is provided with an intermediate relay KA1, one end of a coil of the intermediate relay KA1 is connected with one end of a jigger engagement detection switch PK, the other end of the jigger engagement detection switch PK is connected with a live wire, and the other end of the coil of the intermediate relay KA1 is connected with a zero wire; one end of a normally closed contact of the intermediate relay KA1 is connected with a live wire, and the other end of the normally closed contact of the intermediate relay KA1 is connected with a barring engagement control circuit; and one end of a first normally open contact of the intermediate relay KA1 is connected with a live wire, and the other end of the first normally open contact is connected with a barring operation control circuit.
The barring meshing control circuit is provided with a closing relay KC1, one end of a coil of the closing relay KC1 is connected with one end of an upper computer pulse starting normally open contact DCS4 and one end of a first normally open contact of the closing relay KC1, the other end of the upper computer pulse starting normally open contact DCS4 and the other end of the first normally open contact of the gate relay KC1 are both connected with a normally closed contact of an intermediate relay KA1, a second normally open contact of the closing relay KC1 is connected with the meshing control end of the frequency converter, one end of a third normally open contact of the closing relay KC1 is connected with a live wire, the other end of the third normally open contact of the closing relay KC1 is connected with one end of a coil of the single voltage stabilizing relay KM1, the other end of the single voltage stabilizing relay KM1 is connected with a zero wire, one end of a normally open contact of the single voltage-stabilizing relay KM1 is connected with a DC (direct current) power supply, and the other end of the normally open contact of the single voltage-stabilizing relay KM1 is connected with the barring gear engaging electromagnetic valve.
The barring operation control circuit is provided with a closing relay KC2, the coil one end of the closing relay KC2 is connected with the first normally open contact one end of the upper computer pulse starting normally open contact DCS6 one end and the closing relay KC2, the other end of the upper computer pulse starting normally open contact DCS6 and the other end of the first normally open contact of the closing relay KC2 are connected with the first normally open contact of the intermediate relay KA1, and the second normally open contact of the closing relay KC2 is connected with the barring operation control end of the frequency converter.
The jigger preparation control circuit is also provided with an upper computer pulse stop normally closed contact DCS1, one end of the upper computer pulse stop normally closed contact DCS1 is connected with one end of a normally open contact of an intermediate relay KA2, the other end of the upper computer pulse stop normally closed contact DCS1 is connected with one end of an upper computer pulse start normally open contact DCS2 and a first normally open contact of an intermediate relay KA3, the jigger meshing control circuit is also provided with an upper computer pulse stop normally closed contact DCS3, one end of the upper computer pulse stop normally closed contact DCS3 is connected with one end of a normally closed contact of the intermediate relay KA1, the other end of the upper computer pulse stop normally closed contact DCS3 is connected with one end of an upper computer pulse start normally open contact DCS4 and a first normally open contact of a closing relay KC1, the jigger running control circuit is also provided with an upper computer pulse stop normally closed contact DCS5, one end of the upper computer pulse stop normally closed contact KA 5 is connected with one end of a first normally open contact of an intermediate relay KA1, the other end of the upper computer pulse stopping normally closed contact DCS5 is connected with one end of an upper computer pulse starting normally open contact DCS6 and a first normally open contact of a closing relay KC 2.
The jigger preparation control circuit is also provided with a normally open button switch QA1 and a normally closed button switch SB1, the normally open button switch QA1 is connected in parallel with the upper computer pulse starting normally open contact DCS2 and the first normally open contact of the intermediate relay KA3, the normally closed button switch SB1 is arranged between the upper computer pulse stopping normally closed contact DCS1 and the normally open button switch QA1, the upper computer pulse starting normally open contact DCS2 and the first normally open contact of the intermediate relay KA3, the jigger meshing control circuit is also provided with a normally open button switch QA2 and a normally closed button switch SB2, the normally open button switch QA2 is connected in parallel with the upper computer pulse starting normally open contact DCS4 and the first normally open contact of the switching relay KC1, the normally closed button switch SB2 is arranged between the upper computer pulse stopping normally closed contact DCS3 and the normally open button switch QA2, the upper computer pulse starting normally open contact DCS4 and the normally open relay KC1, the jigger operation control circuit is further provided with normally open button switch QA3 and normally closed button switch SB3, normally open button switch QA3 and the first normally open contact parallel connection of host computer pulse start normally open contact DCS6, combined floodgate relay KC2, normally closed button switch SB3 sets up at the host computer pulse stop between normally closed contact DCS5 and normally open button switch QA3, host computer pulse start normally open contact DCS6, the first normally open contact of combined floodgate relay KC 2.
One end of a second normally open contact of the intermediate relay KA1 is connected with a live wire, and the other end of the second normally open contact of the intermediate relay KA1 is connected with an indicator lamp XD 3; one end of a third normally open contact of the closing relay KC2 is connected with a live wire, the other end of the third normally open contact of the closing relay KC2 is connected with an indicator lamp XD4, and an indicator lamp XD2 is further arranged on the barring preparation control circuit.
The wiring of a barring motor control loop of the steam turbine barring automatic input control system is also provided with an indicator light XD1 for indicating whether a power supply is normal or not. Whether converter self-checking circuit passes through converter fault alarm switch CK and detects the converter normally, if the converter is normal, make the coil of power switch-on intermediate relay KA2, after intermediate relay KA 2's coil was gone up the electricity, intermediate relay KA 2's normally open contact is closed, when the host computer detects the steam turbine rotor and becomes to stop by the operation, send pulse start signal, make host computer pulse start normally open contact DCS2 closed, otherwise host computer pulse stop normally closed contact DCS1 disconnection, intermediate relay KA 3's coil is electrified after host computer pulse start normally open contact DCS2 is closed, make intermediate relay KA 3's first normally open contact closed, pilot lamp XD2 is bright, intermediate relay KA 3's second normally open contact is closed, start the converter and get into the barring and prepare the state.
And when the upper computer detects that the steam turbine rotor is changed from running to stopping, a pulse starting signal is sent, the upper computer pulse starting normally-open contact DCS4 is closed, otherwise, the upper computer pulse stopping normally-closed contact DCS3 is disconnected, the coil of the switching-on relay KC1 is electrified after the upper computer pulse starting normally-open contact DCS4 is closed, the first normally-open contact, the second normally-open contact and the third normally-open contact of the switching-on relay KC1 are closed, the third normally-open contact of the switching-on relay KC1 is electrified for the coil of the single voltage relay KM1, the closed normally-open contact of the coil of the single voltage relay KM1 is electrified to enable the barring gear engaging electromagnetic valve to be electrified, and the frequency converter is connected with the barring motor to enable the switching-on motor to run at a low speed after the second normally-open contact of the switching-on relay KC1 is closed.
The turning motor drives the driving gear and the meshing mechanism after running at low speed, when the driving gear is meshed with the meshing mechanism, a certain lubricating oil pressure value is formed to enable a turning meshing detection switch PK on a turning meshing detection circuit to be switched on, after the turning meshing detection switch PK is switched on, a coil of an intermediate relay KA1 is electrified, a normally closed contact of an intermediate relay KA1 is switched off, a turning meshing control circuit is switched off, a first normally open contact of the intermediate relay KA1 is closed, a feedback signal that the turning gear is normally meshed with a turbine rotor gear is sent to an upper computer, the upper computer sends a pulse starting signal to the turning running control circuit according to the feedback signal that the turning gear is normally meshed with the turbine rotor gear, the upper computer pulse starting normally open contact DCS6 is closed, otherwise, the upper computer pulse stopping normally closed contact DCS5 is switched off, and a coil of a relay KC2 is electrified after the upper computer pulse starting switching contact DCS6 is closed, the first normally open contact, the second normally open contact and the third normally open contact of the closing relay KC2 are closed, the indicator lamp XD4 is lightened, and the frequency converter is connected with the barring motor to enter the barring rated speed to operate after the second normally open contact of the closing relay KC2, so that the control of automatic input of the steam turbine barring is completed.
The barring preparation control circuit, the barring engagement control circuit and the barring operation control circuit are respectively provided with a normally open button switch QA1 and a normally closed button switch SB1 for auxiliary operation, a normally open button switch QA2 and a normally closed button switch SB2, a normally open button switch QA3 and a normally closed button switch SB3 so as to assist in the input control of the steam turbine barring.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. The automatic turning input control system for the steam turbine is characterized by comprising a frequency converter and an upper computer, wherein the frequency converter is respectively connected with a turning preparation control circuit, a turning engagement control circuit and a turning operation control circuit;
the frequency converter self-checking circuit detects whether the frequency converter is normal, if the frequency converter is normal, when the upper computer detects that the operation of the turbine rotor is changed into stop, a pulse starting signal is sent, and the turning preparation control circuit is started to start the frequency converter to enter a turning preparation state; and meanwhile, when the upper computer detects that the turbine rotor is changed from running to stopping, a pulse starting signal is sent, the turning gear meshing control circuit is started to be connected with the frequency converter to control the low-speed running of the turning gear motor, the turning gear meshing control circuit is simultaneously connected with the turning gear engaging electromagnetic valve to connect the lubricating oil circuit and drive the engaging link mechanism to act, if the turning gear meshing detection circuit detects that the turning gear is normally meshed with the turbine rotor gear, the turning gear meshing control circuit is disconnected, a feedback signal that the turning gear is normally meshed with the turbine rotor gear is sent to the upper computer, and the upper computer sends the pulse starting signal to the turning gear running control circuit to start the frequency converter to control the turning gear motor to run at the turning rated speed according to the feedback signal that the turning gear is normally meshed with the turbine rotor gear.
2. The automatic input control system for the steam turbine barring according to claim 1, wherein an intermediate relay KA2 is provided on the frequency converter self-checking circuit, one end of a coil of the intermediate relay KA2 is connected to one end of a frequency converter fault alarm switch CK, one end of the frequency converter fault alarm switch CK is connected to a live wire, the other end of the intermediate relay KA2 is connected to a neutral wire, one end of a normally open contact of the intermediate relay KA2 is connected to the live wire, and the other end of the normally open contact of the intermediate relay KA2 is connected to a barring preparation control circuit.
3. The automatic input control system of the steam turbine barring according to claim 2, characterized in that the barring preparation control circuit is provided with an intermediate relay KA3, one end of a coil of the intermediate relay KA3 is connected with one end of an upper computer pulse starting normally open contact DCS2 and one end of a first normally open contact of the intermediate relay KA3, the other end of the upper computer pulse starting normally open contact DCS2 and the other end of the first normally open contact of the intermediate relay KA3 are both connected with a normally open contact of an intermediate relay KA2, and a second normally open contact of the intermediate relay KA3 is connected with a barring preparation control end of a frequency converter.
4. The steam turbine barring automatic input control system according to claim 3, wherein the barring engagement detection circuit is provided with an intermediate relay KA1, one end of a coil of the intermediate relay KA1 is connected to one end of a barring engagement detection switch PK, the other end of the barring engagement detection switch PK is connected to a live wire, and the other end of the coil of the intermediate relay KA1 is connected to a neutral wire; one end of a normally closed contact of the intermediate relay KA1 is connected with a live wire, and the other end of the normally closed contact of the intermediate relay KA1 is connected with a barring engagement control circuit; and one end of a first normally open contact of the intermediate relay KA1 is connected with a live wire, and the other end of the first normally open contact is connected with a barring operation control circuit.
5. The steam turbine barring automatic input control system according to claim 4, wherein the barring meshing control circuit is provided with a closing relay KC1, one end of a coil of the closing relay KC1 is connected with one end of a first normally open contact of a switching relay KC1 and one end of an upper computer pulse starting normally open contact DCS4, the other end of the upper computer pulse starting normally open contact DCS4 and the other end of the first normally open contact of a switching relay KC1 are both connected with a normally closed contact of an intermediate relay KA1, a second normally open contact of the switching relay KC1 is connected with a meshing control end of a frequency converter, one end of a third normally open contact of the switching relay KC1 is connected with a live wire, the other end of the third normally open contact of the switching relay KC1 is connected with one end of a coil of a single voltage stabilizing relay KM1, the other end of the single voltage stabilizing relay KM1 is connected with a neutral wire, one end of the normally open contact of the single voltage stabilizing relay KM1 is connected with a DC power supply, the other end of the normally open contact of the monostable relay KM1 is connected with a barring gear engaging electromagnetic valve.
6. The steam turbine barring automatic input control system according to claim 5, wherein the barring operation control circuit is provided with a closing relay KC2, one end of a coil of the closing relay KC2 is connected with one end of an upper computer pulse starting normally open contact DCS6 and one end of a first normally open contact of a closing relay KC2, the other end of the upper computer pulse starting normally open contact DCS6 and the other end of the first normally open contact of a gate relay KC2 are both connected with a first normally open contact of an intermediate relay KA1, and a second normally open contact of the closing relay KC2 is connected with a barring operation control end of a frequency converter.
7. The steam turbine barring automatic input control system according to claim 6, wherein the barring preparation control circuit is further provided with an upper computer pulse stop normally closed contact DCS1, one end of the upper computer pulse stop normally closed contact DCS1 is connected with one end of a normally open contact of the intermediate relay KA2, and the other end of the upper computer pulse stop normally closed contact DCS1 is connected with one end of an upper computer pulse start normally open contact DCS2 and a first normally open contact of the intermediate relay KA 3;
the barring meshing control circuit is further provided with an upper computer pulse stop normally closed contact DCS3, one end of the upper computer pulse stop normally closed contact DCS3 is connected with one end of a normally closed contact of the intermediate relay KA1, and the other end of the upper computer pulse stop normally closed contact DCS3 is connected with one end of an upper computer pulse start normally open contact DCS4 and a first normally open contact of a closing relay KC 1;
the barring operation control circuit is further provided with an upper computer pulse stop normally closed contact DCS5, one end of the upper computer pulse stop normally closed contact DCS5 is connected with one end of a first normally open contact of the intermediate relay KA1, and the other end of the upper computer pulse stop normally closed contact DCS5 is connected with one end of an upper computer pulse start normally open contact DCS6 and the first normally open contact of the closing relay KC 2.
8. The steam turbine barring automatic input control system according to claim 7, wherein the barring preparation control circuit is further provided with a normally open button switch QA1 and a normally closed button switch SB1, the normally open button switch QA1 is connected in parallel with the upper computer pulse starting normally open contact DCS2 and the first normally open contact of the intermediate relay KA3, and the normally closed button switch SB1 is provided between the upper computer pulse stopping normally open contact DCS1 and the normally open button switch QA1, the upper computer pulse starting normally open contact DCS2 and the first normally open contact of the intermediate relay KA 3;
the jigger meshing control circuit is further provided with a normally open button switch QA2 and a normally closed button switch SB2, the normally open button switch QA2 is connected with an upper computer pulse starting normally open contact DCS4 and a first normally open contact of a closing relay KC1 in parallel, and the normally closed button switch SB2 is arranged between an upper computer pulse stopping normally closed contact DCS3 and the normally open button switch QA2, the upper computer pulse starting normally open contact DCS4 and the first normally open contact of the closing relay KC 1;
the barring operation control circuit is further provided with a normally open button switch QA3 and a normally closed button switch SB3, the normally open button switch QA3 is connected with an upper computer pulse starting normally open contact DCS6 and a first normally open contact of a closing relay KC2 in parallel, the normally closed button switch SB3 is arranged between an upper computer pulse stopping normally closed contact DCS5 and a normally open button switch QA3, an upper computer pulse starting normally open contact DCS6 and a first normally open contact of a closing relay KC 2.
9. The automatic starting control system for the steam turbine barring according to claim 8, wherein one end of the second normally open contact of the intermediate relay KA1 is connected to a live wire, and the other end of the second normally open contact of the intermediate relay KA1 is connected to an indicator lamp XD 3; one end of a third normally open contact of the closing relay KC2 is connected with a live wire, and the other end of the third normally open contact of the closing relay KC2 is connected with an indicator lamp XD 4.
10. The automatic starting control system for the steam turbine turning gear according to claim 8, wherein an indicator light XD2 is further provided on the turning gear preparation control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023008290.4U CN214063080U (en) | 2020-12-15 | 2020-12-15 | Automatic input control system for steam turbine turning gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023008290.4U CN214063080U (en) | 2020-12-15 | 2020-12-15 | Automatic input control system for steam turbine turning gear |
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| CN214063080U true CN214063080U (en) | 2021-08-27 |
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| CN202023008290.4U Active CN214063080U (en) | 2020-12-15 | 2020-12-15 | Automatic input control system for steam turbine turning gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931708A (en) * | 2021-09-29 | 2022-01-14 | 华能山东石岛湾核电有限公司 | Steam turbine barring drive circuit and device |
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2020
- 2020-12-15 CN CN202023008290.4U patent/CN214063080U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931708A (en) * | 2021-09-29 | 2022-01-14 | 华能山东石岛湾核电有限公司 | Steam turbine barring drive circuit and device |
| CN113931708B (en) * | 2021-09-29 | 2023-11-21 | 华能山东石岛湾核电有限公司 | Steam turbine jigger driving circuit and device |
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