CN217976338U - Standby oil supply system of steam turbine - Google Patents
Standby oil supply system of steam turbine Download PDFInfo
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- CN217976338U CN217976338U CN202221919549.7U CN202221919549U CN217976338U CN 217976338 U CN217976338 U CN 217976338U CN 202221919549 U CN202221919549 U CN 202221919549U CN 217976338 U CN217976338 U CN 217976338U
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Abstract
The utility model relates to a reserve oil feeding system of steam turbine, including steam turbine and lubricating oil station, the lubricating oil station includes lubricating oil tank and lubricating oil pump package, and the export of lubricating oil pump package and the oil inlet of steam turbine are through main oil feed pipeline intercommunication, be provided with the sensor on the main oil feed pipeline of oil inlet department, it has first check valve to establish ties on the main oil feed pipeline between sensor and the export of lubricating oil pump package, and the import of lubricating oil pump package communicates with the lubricating oil tank, the oil-out of steam turbine communicates with the lubricating oil tank through returning oil pipeline; a main oil supply pipeline between the first check valve and the sensor is communicated with an outlet of a standby oil supply system through a pipeline, an inlet of the standby oil supply system is communicated with the lubricating oil tank, and the sensor is connected with the standby oil supply system; the sensor is connected with the standby oil supply system through a control device. The steam turbine is safely shut down through a simple system structure, the lubricating and cooling effects during the safe shutdown of the steam turbine are improved, and the safety risk is reduced.
Description
Technical Field
The utility model belongs to the technical field of the steam turbine technique and specifically relates to a reserve oil feeding system of steam turbine.
Background
The steam turbine is a rotary power machine, converts steam energy into mechanical power, and is widely applied to various social and economic departments. During the working process of the steam turbine, oil needs to be supplied to each bearing continuously by a turbine oil lubricating system, and heat generated by main steam through shaft conduction, friction and turbulence is taken away. Bearing failure is a serious accident of the turbo generator set, which may cause serious damage to the equipment, such as wear of the journal and thrust disk, burning of the bearing and thrust bearing, and collision of the rotating part and the stationary part caused thereby, and even fire or explosion of the bearing housing. When the turbine is operating, a sufficient amount of lubricant is provided by the lubricant station to each bearing of the turbine. The lube station is generally equipped with an ac lube pump as a common pump and a dc pump powered by a dc ups as a backup pump. However, the burning accident caused by the oil supply interruption due to the aging of the electric elements, the inadequate maintenance and operation of the equipment after a long-time use and the failure of timely starting the standby pump also happens occasionally.
In order to cope with the situation of the oil supply interruption, a turbine lubricating oil system needs to be provided with a reliable standby oil supply system to ensure the safe shutdown of a unit, and at present, a high-level oil tank is usually provided, but the high-level oil tank has the following disadvantages:
a. the system is complex: the high-order oil tank needs to be configured with enough oil tanks for the unit to stop and coast away the needed oil, meanwhile, the ground needs to be configured with the oil tank capable of accommodating the lower-row oil sliding amount in the high-order oil tank, the space of the site is greatly occupied, and the later-period cleaning and maintenance are difficult.
b. The safety risk is high: the large amount of lubricant stored around the turbine presents a risk of fire and explosion.
c. The lubricating and cooling effects are limited: particularly in winter, the temperature of lubricating oil in a high-level oil tank is low, the viscosity is high, the height of the common lubricating oil tank is within 10 meters, the flow velocity of the lubricating oil is low due to low oil pressure and high viscosity, and the lubricating and cooling effects are not ideal.
SUMMERY OF THE UTILITY MODEL
The applicant provides a standby oil supply system for the steam turbine aiming at the defects in the prior art, so that the safe shutdown of the steam turbine is realized by a simple system structure, the lubricating and cooling effects during the safe shutdown of the steam turbine are improved, and the safety risk is reduced.
The utility model discloses the technical scheme who adopts as follows:
a standby oil supply system of a steam turbine comprises the steam turbine and a lubricating oil station, wherein the lubricating oil station comprises a lubricating oil tank and a lubricating oil pump set, an outlet of the lubricating oil pump set is communicated with an oil inlet of the steam turbine through a main oil supply pipeline, a sensor is arranged on the main oil supply pipeline at the oil inlet, a first check valve is connected in series on the main oil supply pipeline between the sensor and the outlet of the lubricating oil pump set, an inlet of the lubricating oil pump set is communicated with the lubricating oil tank, and an oil outlet of the steam turbine is communicated with the lubricating oil tank through a lubricating oil pipeline;
a main oil supply pipeline between the first check valve and the sensor is communicated with an outlet of a standby oil supply system through a pipeline, an inlet of the standby oil supply system is communicated with the lubricating oil tank, and the sensor is connected with the standby oil supply system;
the sensor is connected with the standby oil supply system through a control device.
The further technical scheme is as follows:
the structure of the standby oil supply system is as follows: including reserve oil supply pipeline, reserve oil supply pipeline establishes ties second check valve and pneumatic lubricating oil pump in proper order, and the export and the main oil supply pipeline intercommunication of reserve oil supply pipeline, the second check valve is located between the export and the pneumatic lubricating oil pump of reserve oil supply pipeline, and the import and the lubricating oil tank intercommunication of reserve oil supply pipeline, pneumatic lubricating oil pump is connected with pneumatic control system, the control device is connected with pneumatic control system.
The pneumatic control system has the structure that: the pneumatic pipeline is connected with a pneumatic power source, a manual stop valve, an electric stop valve and a pressure reducing valve are sequentially connected with the pneumatic pipeline in series, the pressure reducing valve is communicated with a pneumatic lubricating oil pump, and the electric stop valve is connected with a control device.
The pneumatic power source is a main steam pipeline.
The pneumatic power source is compressed air.
The compressed air is stored in an air reservoir.
And a safety discharge pipeline is arranged on the pneumatic pipeline between the pneumatic lubricating oil pump and the pressure reducing valve, and a safety valve is arranged on the safety discharge pipeline.
The sensor is a pressure sensor, and the control device is a pressure switch.
The utility model has the advantages as follows:
the utility model has the advantages of compact and reasonable structure, high convenience for operation, through setting up the reserve oil feeding system with main oil feed line and lubricating oil tank intercommunication, make reserve oil feeding system and lubricating oil station sharing lubricating oil tank, realized steam turbine safety shut down with simple system architecture, and the lubricating oil when making steam turbine safety shut down be hot oil, the velocity of flow is fast, lubrication cooling effect when improving steam turbine safety shut down, need not additionally to dispose high-order oil tank, whole system's lubricating oil total amount and area have been reduced, thereby a large amount of lubricating oil costs have been practiced thrift, the safety risk has been reduced.
And simultaneously, the utility model discloses still there is following advantage:
(1) The pressure reducing valve is arranged in the pneumatic control system, so that the oil supply quantity of the standby oil supply system is adjustable, and the flexibility of the system is improved.
(2) The comprehensive control of the sensor, the control device and the electric stop valve enables the feedback of the standby oil supply system to be rapid, and the safe shutdown of the steam turbine is guaranteed in time.
(3) The compressed air stored in the air storage tank is used as a pneumatic power source, so that the capital construction cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Wherein: 1. a steam turbine; 2. an oil station; 3. a main oil supply line; 4. an oil return line; 5. a standby oil supply system; 6. a pneumatic control system; 71. a main steam line; 72. a gas storage tank;
101. an oil inlet; 102. an oil outlet;
201. a lubricant pump unit; 2011. a common lubricating oil pump; 2012. a spare lubricating oil pump; 202. a lubricating oil tank;
301. a first check valve; 302. a sensor; 303. a control device;
500. a spare oil supply pipeline; 501. a second check valve; 502. a pneumatic lubricating oil pump;
600. a pneumatic line; 601. a manual stop valve; 602. an electrically operated shutoff valve; 603. a pressure reducing valve; 604. a safety relief line; 6041. a safety valve.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a standby oil supply system for a steam turbine according to a first embodiment includes a steam turbine 1 and a lubricating oil station 2, the lubricating oil station 2 includes a lubricating oil tank 202 and a lubricating oil pump set 201, an outlet of the lubricating oil pump set 201 is communicated with an oil inlet 101 of the steam turbine 1 through a main oil supply pipeline 3, a sensor 302 is arranged on the main oil supply pipeline 3 at the oil inlet 101, a first check valve 301 is connected in series on the main oil supply pipeline 3 between the sensor 302 and an outlet of the lubricating oil pump set 201, an inlet of the lubricating oil pump set 201 is communicated with the lubricating oil tank 202, and an oil outlet 102 of the steam turbine 1 is communicated with the lubricating oil tank 202 through an oil return pipeline 4;
the main oil supply pipeline 3 between the first check valve 301 and the sensor 302 is communicated with an outlet of the standby oil supply system 5 through a pipeline, an inlet of the standby oil supply system 5 is communicated with the lubricating oil tank 202, and the sensor 302 is connected with the standby oil supply system 5;
the sensor 302 is connected to the backup oil supply system 5 via a control device 303.
The lubricating oil pump group 201 generally equipped in the lubricating oil station 2 is formed by connecting a common lubricating oil pump 2011 and a standby lubricating oil pump 2012 in parallel, the common lubricating oil pump 2011 is driven by alternating current, and the standby lubricating oil pump 2012 is driven by direct current. When the steam turbine 1 normally operates, the lubricating oil station 2 is driven by a common lubricating oil pump 2011 or a standby lubricating oil pump 2012 in the lubricating oil pump set 201 to send the lubricating oil in the lubricating oil tank 202 into the main oil supply pipeline 3 to supply oil to the bearings of the steam turbine 1, and the main oil supply pipeline 3, the oil return pipeline 4, the steam turbine 1 and the lubricating oil tank 202 of the lubricating oil station 2 form a first lubricating oil closed-loop circulation.
The standby oil supply system 5 is used for ensuring that the steam turbine 1 is safely stopped, and when the lubricating oil pump set 201 of the lubricating oil station 2 fails and can not normally supply oil, a second lubricating oil closed loop is formed by the standby oil supply system 5, the main oil supply pipeline 3 at the oil inlet 101, the oil return pipeline 4, the steam turbine 1 and the lubricating oil tank 202 of the lubricating oil station 2.
The first check valve 301 is arranged on the main oil supply pipeline 3, so that the first closed circulation of the lubricating oil when the steam turbine 1 normally operates and the second closed circulation of the lubricating oil when the lubricating oil pump group 201 of the lubricating oil station 2 fails and can not normally supply oil can be relatively independent; a sensor 302 is arranged on the main oil supply pipeline 3 at the oil inlet 101 and used for detecting the supply condition of the lubricating oil of the main oil supply pipeline 3, the standby oil supply system 5 is controlled and started through a control device 303, and when the supply of the lubricating oil does not meet the normal operation of the steam turbine 1, the lubricating oil is fed back to the standby oil supply system 5, and the closed circulation of the second lubricating oil is started.
The standby oil supply system 5 communicated with the main oil supply pipeline 3 and the lubricating oil tank 202 is arranged, so that the standby oil supply system 5 and the lubricating oil station 2 share the lubricating oil tank 202, the safe shutdown of the steam turbine 1 is realized by a simple system structure, the lubricating oil is hot oil when the steam turbine 1 is safely shut down, the flow speed is high, and the lubricating and cooling effects when the steam turbine 1 is safely shut down are improved; the lubricating oil tank 202 and part of pipelines are shared, and a high-level oil tank does not need to be additionally arranged, so that the total lubricating oil amount and the occupied area of the whole system are reduced, the cost of a large amount of lubricating oil is saved, and the fire and explosion risks caused by arrangement of the high-level oil tank are avoided.
The structure of the standby oil supply system 5 is as follows: the structure of the standby oil supply system 5 is as follows: the emergency oil supply system comprises a standby oil supply pipeline 500, wherein the standby oil supply pipeline 500 is sequentially connected with a second check valve 501 and a pneumatic lubricating oil pump 502 in series, the outlet of the standby oil supply pipeline 500 is communicated with a main oil supply pipeline 3, the second check valve 501 is located between the outlet of the standby oil supply pipeline 500 and the pneumatic lubricating oil pump 502, the inlet of the standby oil supply pipeline 500 is communicated with a lubricating oil tank 202, the pneumatic lubricating oil pump 502 is connected with a pneumatic control system 6, and a control device 303 is connected with the pneumatic control system 6. The outlet of the standby oil supply system 5 is the outlet of the standby oil supply pipeline 500, and the inlet of the standby oil supply system 5 is the inlet of the standby oil supply pipeline 500; the sensor 302 and the control device 303 feed back the supply of the oil in the main oil supply line 3 to the pneumatic control system 6 for controlling the backup oil supply system 5.
The driving mode of the pneumatic lubricating oil pump 502 in the standby oil supply system 5 is realized in a pneumatic mode, when the lubricating oil station 2 cannot work normally, the pneumatic control system 6 is used for starting the pneumatic lubricating oil pump 502 to supply oil to the steam turbine 1, and the system is simple, economical and safe; the backup oil supply line 500 is connected to the bottom of the lubricating oil tank 202, and the pneumatic lubricating oil pump 502 is operated to supply the lubricating oil in the lubricating oil tank 202 into the main oil supply line 3 and supply the oil to each bearing of the steam turbine 1.
The structure of the pneumatic control system 6 is as follows: the pneumatic control device comprises a pneumatic pipeline 600 connected with a pneumatic power source, wherein a manual stop valve 601, an electric stop valve 602 and a pressure reducing valve 603 are sequentially connected in series on the pneumatic pipeline 600, the pressure reducing valve 603 is communicated with a pneumatic lubricating oil pump 502, and the electric stop valve 602 is connected with a control device 303.
The pressure reducing valve 603 is used for adjusting the pressure of the pneumatic pipeline 600, so that the pressure meets the requirement that the flow for driving the pneumatic lubricating oil pump 502 meets the minimum lubricating oil flow required by the turbine 1 to idle, and meanwhile, the lubricating oil pressure of the main oil supply pipeline 3 meets the requirement when the pneumatic lubricating oil pump 502 runs. The pressure reducing valve 603 is arranged in the pneumatic control system 6, so that the oil supply quantity of the standby oil supply system 5 is adjustable, and the flexibility of the system is increased.
A safety relief pipeline 604 is provided on the pneumatic pipeline 600 between the pneumatic lube pump 502 and the pressure reducing valve 603, and a safety valve 6041 is provided on the safety relief pipeline 604. The safety relief line 604 is provided to ensure system safety.
The sensor 302 is a pressure sensor and the control device 303 is a pressure switch.
The source of pneumatic power is the main steam line 71. When the standby oil supply system 5 works, steam is introduced into the pneumatic pipeline 600 to drive the pneumatic lubricating oil pump 502 and then enters the condenser.
The control process of the standby oil supply system of the steam turbine of the first embodiment is as follows:
parameter debugging: the pressure of the pneumatic pipeline 600 is controlled by adjusting the pressure reducing valve 603, so that the steam pressure meets the requirement of driving the pneumatic lubricating oil pump 502 of the standby oil supply system 5, and meanwhile, the flow of the pneumatic lubricating oil pump 502 meets the requirement of the minimum lubricating oil flow required by the idling of the steam turbine 1;
and (3) system testing: manually opening the electric stop valve 602, testing whether the pneumatic lubricating oil pump 502 can normally operate, and whether the lubricating oil pressure of the main oil supply pipeline 3 meets the minimum required value when the pneumatic lubricating oil pump 502 operates;
and (3) an operation stage:
when the steam turbine 1 normally operates, the lubricating oil pump set 201 of the lubricating oil station 2 sends the lubricating oil in the lubricating oil tank 202 into the main oil supply pipeline 3 and supplies oil to the bearing of the steam turbine 1, meanwhile, the manual stop valve 601 of the pneumatic control system 6 is fully opened, the electric stop valve 602 is in a closed state, and the main oil supply pipeline 3, the oil return pipeline 4, the steam turbine 1 and the lubricating oil station 2 form a first lubricating oil closed cycle;
when the lubricating oil pump group 201 of the lubricating oil station 2 fails and normal oil supply cannot be performed, the sensor 302 detects that the pressure of the lubricating oil in the main oil supply pipeline 3 is reduced to be lower than a minimum required value, the control device 303 sends a signal to the electric stop valve 602 to enable the electric stop valve 602 to be in an open state, steam is introduced into the pneumatic pipeline 600, then the pneumatic lubricating oil pump 502 is started, the lubricating oil in the lubricating oil tank 202 is sent into the main oil supply pipeline 3 through the pneumatic lubricating oil pump 502 to supply oil to the bearing of the turbine 1, so that the turbine 1 is ensured to be safely stopped, the standby oil supply system 5, the main oil supply pipeline 3 at the oil inlet 101, the oil return pipeline 4, the turbine 1 and the lubricating oil tank 202 of the lubricating oil station 2 form a second closed lubricating oil circulation, and the steam enters the condenser after passing through the pneumatic lubricating oil pump 502.
In the control process of the standby oil supply system for the steam turbine according to the first embodiment, when the lubricating oil pump group 201 of the lubricating oil station 2 fails and can not supply oil normally, the lubricating oil tank 202 is communicated with the steam turbine 1 through the standby oil supply system 5 to ensure that the steam turbine 1 is stopped safely, so that tile burning accidents are avoided, the control method is simple, the feedback is rapid, the flow of the lubricating oil is adjustable, and the flexibility of the system is good; and the lubricating oil when the steam turbine 1 is safely stopped is thermal state oil, so that the lubricating effect when the steam turbine 1 is safely stopped is improved, the total lubricating oil amount and the occupied area of the whole system are reduced due to the fact that the lubricating oil tank 202 and part of pipelines are shared, the cost is saved, and the safety risk is reduced.
As shown in fig. 2, the difference between the backup oil supply system for a steam turbine of the second embodiment and the backup oil supply system for a steam turbine of the first embodiment is: the pneumatic power source is compressed air, which is stored in an air reservoir 72. When the standby oil supply system 5 is in operation, compressed air is introduced into the pneumatic pipeline 600 to drive the pneumatic lubricating oil pump 502 and then discharged. The air storage tank 72 is used for storing compressed air as a pneumatic power source, the capital construction cost is reduced, the capacity of the air storage tank 72 needs to meet the requirement that the running time of the pneumatic lubricating oil pump 502 is not less than the idle running time of the steam turbine 1, and the capacity needs to be calculated according to the idle running time of the steam turbine 1 and the starting pressure of the pneumatic lubricating oil pump 502.
The control process of the backup oil supply system of the steam turbine in the second embodiment is as follows:
parameter debugging: the pressure of the pneumatic pipeline 600 is controlled by adjusting the pressure reducing valve 603, so that the pressure and the air quantity of the compressed air meet the requirements of driving the pneumatic lubricating oil pump 502 of the standby oil supply system 5, and meanwhile, the flow of the pneumatic lubricating oil pump 502 meets the requirement of the minimum lubricating oil flow required by the turbine 1 to idle;
and (3) system testing: manually opening the electric stop valve 602, testing whether the pneumatic lubricating oil pump 502 can normally operate, and whether the lubricating oil pressure of the main oil supply pipeline 3 meets the minimum required value when the pneumatic lubricating oil pump 502 operates;
and (3) an operation stage:
when the steam turbine 1 normally operates, the lubricating oil pump set 201 of the lubricating oil station 2 sends the lubricating oil in the lubricating oil tank 202 into the main oil supply pipeline 3 and supplies oil to the bearing of the steam turbine 1, meanwhile, the manual stop valve 601 of the pneumatic control system 6 is fully opened, the electric stop valve 602 is in a closed state, and the main oil supply pipeline 3, the oil return pipeline 4, the steam turbine 1 and the lubricating oil station 2 form a first closed-loop circulation of the lubricating oil;
when the lubricating oil pump group 201 of the lubricating oil station 2 fails and normal oil supply cannot be performed, the sensor 302 detects that the lubricating oil pressure of the main oil supply pipeline 3 is reduced to be lower than a minimum required value, the control device 303 sends a signal to the electric stop valve 602 to enable the electric stop valve 602 to be in an open state, compressed air is introduced into the pneumatic pipeline 600, the pneumatic lubricating oil pump 502 is started, the lubricating oil in the lubricating oil tank 202 is sent into the main oil supply pipeline 3 through the pneumatic lubricating oil pump 502 and supplied to the bearing of the turbine 1, so that the turbine 1 is ensured to be safely stopped, the standby oil supply system 5, the main oil supply pipeline 3 at the oil inlet 101, the oil return pipeline 4, the turbine 1 and the lubricating oil tank 202 of the lubricating oil station 2 form a second closed lubricating oil circulation, steam enters a condenser after passing through the pneumatic lubricating oil pump 502, and the compressed air is discharged after passing through the pneumatic lubricating oil pump 502.
In the control process of the standby oil supply system of the steam turbine in the second embodiment, when the lubricating oil pump group 201 of the lubricating oil station 2 fails and can not supply oil normally, the lubricating oil tank 202 is communicated with the steam turbine 1 through the standby oil supply system 5 to ensure that the steam turbine 1 is stopped safely, so that the occurrence of tile burning accidents is avoided, the control method is simple, the feedback is rapid, the flow of the lubricating oil is adjustable, and the flexibility of the system is good; the lubricating oil is hot oil when the steam turbine 1 is safely stopped, so that the lubricating effect of the steam turbine 1 is improved when the steam turbine 1 is safely stopped, the total amount of the lubricating oil and the occupied area of the whole system are reduced due to the fact that the lubricating oil tank 202 and part of pipelines are shared, the cost is saved, and the safety risk is reduced; and the construction cost is reduced by adopting a pneumatic power source to drive the standby oil supply system 5 by compressed air.
The above description is for the purpose of explanation and not limitation of the invention, and reference is made to the claims for what are intended to be covered by the present invention.
Claims (8)
1. The utility model provides a reserve oil feeding system of steam turbine, includes steam turbine (1) and lubricating oil station (2), its characterized in that: the lubricating oil station (2) comprises a lubricating oil tank (202) and a lubricating oil pump set (201), an outlet of the lubricating oil pump set (201) is communicated with an oil inlet (101) of a steam turbine (1) through a main oil supply pipeline (3), a sensor (302) is arranged on the main oil supply pipeline (3) at the oil inlet (101), a first check valve (301) is connected in series on the main oil supply pipeline (3) between the sensor (302) and an outlet of the lubricating oil pump set (201), an inlet of the lubricating oil pump set (201) is communicated with the lubricating oil tank (202), and an oil outlet (102) of the steam turbine (1) is communicated with the lubricating oil tank (202) through an oil return pipeline (4);
a main oil supply pipeline (3) between the first check valve (301) and the sensor (302) is communicated with an outlet of a standby oil supply system (5) through a pipeline, an inlet of the standby oil supply system (5) is communicated with the lubricating oil tank (202), and the sensor (302) is connected with the standby oil supply system (5);
the sensor (302) is connected to the standby oil supply system (5) via a control device (303).
2. The backup oil supply system for a steam turbine of claim 1, wherein: the spare oil supply system (5) is structurally characterized in that: including reserve oil feed line (500), reserve oil feed line (500) establishes ties second check valve (501) and pneumatic lubricating oil pump (502) in proper order, the export and the main oil feed line (3) intercommunication of reserve oil feed line (500), second check valve (501) are located between export and the pneumatic lubricating oil pump (502) of reserve oil feed line (500), and the import and the lubricating oil tank (202) intercommunication of reserve oil feed line (500), pneumatic lubricating oil pump (502) are connected with pneumatic control system (6), control device (303) are connected with pneumatic control system (6).
3. The backup oil supply system for a steam turbine according to claim 2, wherein: the structure of the pneumatic control system (6) is as follows: including pneumatic pipeline (600) of being connected with pneumatic power supply, establish ties manual stop valve (601), electronic stop valve (602) and relief pressure valve (603) in proper order on pneumatic pipeline (600), relief pressure valve (603) with pneumatic lubricating oil pump (502) intercommunication, electronic stop valve (602) are connected with controlling means (303).
4. The backup oil supply system for a steam turbine according to claim 3, wherein: the pneumatic power source is a main steam pipeline (71).
5. A backup oil supply system for a steam turbine according to claim 3, wherein: the pneumatic power source is compressed air.
6. The backup oil supply system for a steam turbine according to claim 5, wherein: the compressed air is stored in an air reservoir (72).
7. A backup oil supply system for a steam turbine according to claim 3, wherein: a safety discharge pipeline (604) is arranged on a pneumatic pipeline (600) between the pneumatic lubricating oil pump (502) and the pressure reducing valve (603), and a safety valve (6041) is arranged on the safety discharge pipeline (604).
8. The backup oil supply system for a steam turbine of claim 1, wherein: the sensor (302) is a pressure sensor and the control device (303) is a pressure switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221919549.7U CN217976338U (en) | 2022-07-21 | 2022-07-21 | Standby oil supply system of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221919549.7U CN217976338U (en) | 2022-07-21 | 2022-07-21 | Standby oil supply system of steam turbine |
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| Publication Number | Publication Date |
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| CN217976338U true CN217976338U (en) | 2022-12-06 |
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| CN202221919549.7U Active CN217976338U (en) | 2022-07-21 | 2022-07-21 | Standby oil supply system of steam turbine |
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- 2022-07-21 CN CN202221919549.7U patent/CN217976338U/en active Active
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