CN106761971B - A kind of method of the emergent supply turbo-engine lube of high position energy storage - Google Patents
A kind of method of the emergent supply turbo-engine lube of high position energy storage Download PDFInfo
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- CN106761971B CN106761971B CN201611240426.XA CN201611240426A CN106761971B CN 106761971 B CN106761971 B CN 106761971B CN 201611240426 A CN201611240426 A CN 201611240426A CN 106761971 B CN106761971 B CN 106761971B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004146 energy storage Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 152
- 239000010687 lubricating oil Substances 0.000 claims description 143
- 239000003921 oil Substances 0.000 claims description 64
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000005381 potential energy Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 abstract description 2
- 239000004519 grease Substances 0.000 abstract 3
- 239000000446 fuel Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 abstract 1
- 230000007257 malfunction Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/20—Lubricating arrangements using lubrication pumps
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of methods of the high-order emergent supply turbo-engine lube of energy storage, including the use of the water of high water tank storage as gravitional force, once the grease pump feed system cisco unity malfunction of steam turbine, the water discharged in high water tank acts on the hydraulic turbine, it converts high-order gravitional force and kinetic energy to mechanical energy by the hydraulic turbine, drives grease pump normal fuel injection.The method of the present invention provides for large-size steam turbine and a set of establishes gravitional force by working medium of water as the oil feeding device of drive energy without electric power; it may insure in the case where the alternating current and direct current grease pump of the original configuration of steam turbine all fails; also last a set of lube plant directly provides the bearing lubrication oil mass that Turbine Safety shuts down coasting operation using mechanical energy, avoids that serious steam turbine oil-break burning accident occurs.
Description
Technical Field
The invention belongs to a steam turbine, and particularly relates to a method for emergency supply of lubricating oil to a steam turbine by high-level energy storage.
Technical Field
Large steam turbines are key equipment widely used in industries such as thermal power plants, nuclear power plants and the like. The large rotating machinery generally adopts a sliding bearing, and a turbine original lubricating oil supply and interlocking protection system comprises the following components: when the steam turbine normally operates, a main oil pump or an alternating-current lubricating oil pump is driven by a main shaft of the steam turbine to provide sufficient lubricating oil for each bearing, a direct-current lubricating oil pump with a storage battery for providing a direct-current power supply is further configured in the lubricating oil system to serve as the final guarantee that the alternating-current lubricating oil pump of the unit fails, and the lubricating oil system further has logic protection such as low-value turbine lubricating oil pressure or steam turbine tripping interlocking alternating-current lubricating oil pump, low-binary interlocking starting of the direct-current lubricating oil pump and.
Although the steam turbine lubricating oil supply and protection system is provided with a standby alternating current and direct current lubricating oil pump and an interlocking protection system, the oil-cut and tile-burning accidents of a large steam turbine generator unit still occur in the actual production, the accidents mainly include short-time pressure loss and oil cut of an oil pump caused by air gathered by a shell of the alternating current and direct current lubricating oil pump, oil cut of the lubricating oil pump caused by failure of an alternating current power supply and a direct current power supply or switching failure of an oil pump motor, oil cut of the lubricating oil pump caused by low lubricating oil pressure or failure of the interlocking protection system, the alternating current and direct current lubricating oil pump started in time, oil burning caused by oil circuit interruption due to internal blockage of a lubricating oil system filter.
Therefore, the existing lubricating oil supply and protection system of the steam turbine still has certain potential safety hazards of oil cut and tile burning, and in order to prevent the steam turbine from generating oil cut and tile burning accidents, the 8.4.1 provision of twenty-five key requirements for preventing electric power production accidents is issued by the national energy agency 2014 4 months: the turbine should be provided with a lubricating oil energy storage device (such as a high-level oil tank) with enough capacity, and once the lubricating oil pump and the system are in failure, the energy storage device can ensure that the unit is safely shut down without bearing bush burnout and bearing abrasion. The high-level oil tank is mainly applied to equipment such as compressors and industrial turbines in petrochemical and metallurgical industries, but a large-scale steam turbine in China does not have the design of the high-level energy storage oil tank, experience and achievement of actual operation, and the quantity of lubricating oil for ensuring safe shutdown and inerting of the large-scale steam turbine is multiple times or even more than ten times of that of the equipment such as the compressors and the industrial turbines, taking a steam turbine generator unit of a 600MW thermal power plant as an example, the high-level energy storage oil tank must be arranged at a position 5-8 m above an operating layer of the steam turbine generator unit, and the total volume of the lubricating oil required by 35min for meeting the safe inerting time of3Furthermore, the bottom of the turbine plant must be equipped with a low-level tank of the same volume to accommodate the amount of lubricating oil discharged from the lower line of the high-level tank, and a high-level reservoirThe oil tank system also needs supporting facilities such as oil level monitoring, a smoke exhaust system, oil circulation, oil purification, fire fighting and the like, and the whole system has huge investment. The high-level oil tank is arranged in the steam turbine plant, and on the running platform of the steam turbine generator unit, the large-scale generator is filled with flammable and combustible hydrogen to run, and the high-level oil tank brings huge fire or explosion safety risks to main and auxiliary equipment of the steam turbine plant and even the whole power plant.
Disclosure of Invention
The invention aims to provide a safe, simple, convenient and economic method for emergency supply of turbine lubricating oil by high-level energy storage.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the invention provides a method for supplying lubricating oil to a steam turbine in an emergency manner by high-level energy storage.
The method further comprises the step that the lubricating oil pump sucks lubricating oil from the bottom of an original lubricating oil tank and supplies the lubricating oil to each bearing of the turbo generator unit through an original lubricating oil pipeline, so that original equipment of a lubricating oil system can be fully utilized, the lubricating oil tank and the lubricating oil are not required to be additionally added, and meanwhile, the lubricating oil can still be normally supplied when the oil level of the lubricating oil tank is low.
The water in the high-level water tank is released to act on the water turbine, a signal is sent out by the low-pressure switch action of a main lubricating oil pipe of the steam turbine, the high-level water tank is automatically interlocked and opened to a pneumatic control stop valve of the water turbine through the control of an electromagnetic valve, or the pneumatic control stop valve or a bypass valve of the pneumatic control stop valve is opened by an operator according to the manual control of the electromagnetic valve under the actual condition, or when extreme conditions such as power loss or gas loss of a whole plant occur, the pneumatic control stop valve loses a power source and accordingly automatically opens the valve by means.
Compared with the prior art, the invention has the following beneficial effects:
1) the method adopts the high-level water tank, fully utilizes the principle of gravity flow of water and a passive idea to construct a set of brand-new oil supply emergency system, abandons the traditional mode that the oil supply emergency system adopts a generator and a motor device, and does not need other external electric power and air sources once extreme conditions such as power failure of the whole plant, starting failure of an oil pump motor, failure of a compressed air source and the like occur. The method directly converts the gravitational potential energy and the kinetic energy of the water into the mechanical energy, simplifies the system, realizes automation of the system without human intervention, and avoids the adverse factors of efficiency reduction, system reliability reduction and the like caused by repeated conversion of the mechanical energy and the electric energy.
2) The method can adopt common water as an energy storage medium, the water tank and the pipeline are made of common carbon steel materials, the drainage of the water turbine can be directly discharged to a rainwater well, the deaerator and the lubricating oil system of the original unit can be fully utilized, only one water turbine and a centrifugal oil pump are added, the whole emergency system has small investment, no pollution, strong performability and low maintenance cost, and no major fire hazard or explosion potential safety hazard caused by a high-level oil tank energy storage system.
3) The oil supply emergency system constructed by the method also has a protection function of preventing the oil level of the lubricating oil tank from being low, and as the distance between the lubricating oil pump suction inlet configured in the original lubricating oil system of the steam turbine and the bottom of the lubricating oil tank is a certain height, once a system oil leakage accident occurs, the oil level of the lubricating oil tank is close to or lower than the oil pump suction inlet of the original lubricating oil pump, and the oil supply emergency system can generate oil cut and tile burning due to the fact that the original oil pump cannot. According to the method, the lubricating oil pump is arranged at a low position, and the inlet of the oil pump is connected from the bottom of the lubricating oil tank, so that the original equipment of the lubricating oil system can be fully utilized, the lubricating oil tank and the lubricating oil are not required to be additionally added, and the lubricating oil can still be normally supplied to each bearing bush of the steam turbine when the oil level of the lubricating oil tank is low.
The method of the invention provides a set of lubricating oil supply device which does not need electric power and takes water as working medium to establish gravitational potential energy as driving energy for a large-scale steam turbine, and can ensure that under the condition that the AC and DC lubricating oil pumps originally configured for the steam turbine are all invalid, the last set of lubricating oil device directly utilizes mechanical energy to provide the bearing lubricating oil quantity which is lazily moved when the steam turbine is safely stopped, thereby avoiding serious accidents of oil cutting and tile burning of the steam turbine.
The invention can be used for the reconstruction of the existing turbine lubricating oil supply system and the design of new equipment.
The technical scheme of the invention is further explained by combining the attached drawings.
Drawings
FIG. 1 is a schematic flow diagram of a turbine lubricant pump supply system.
FIG. 2 is a schematic diagram of a water turbine and a lubricating oil pump set in a high-level energy storage emergency supply turbine lubricating oil device.
In the figure, 1 is a high-level water tank, 2 is a high-level water tank water level gauge, 3 is a pneumatic stop valve front ball valve, 4 is a pneumatic control stop valve, 5 is a pneumatic stop valve rear ball valve, 6 is a pneumatic stop valve bypass ball valve, 7 is a regulating valve front stop valve, 8 is a self-operated flow regulating valve, 9 is a regulating valve bypass stop valve, 10 is a water turbine, 11 is a transmission device such as a main shaft, a gear or a belt, 12 is a centrifugal lubricating oil pump, 13 is a lubricating oil system lubricating oil tank, 14 is an alternating-current lubricating oil pump, 15 is a direct-current lubricating oil pump, 16 is an oil turbine or an oil injector, 17 is a lubricating oil pump outlet check valve, 18 is a lubricating oil cooler, 19 is a lubricating oil filter screen, 20 is a steam turbine main oil pump, 21 is a steam turbine, 22 is a self-lubricating rolling.
Detailed Description
Referring to fig. 1, the method for emergency supply of turbine lubricating oil by high-level energy storage according to the present invention includes using water stored in a high-level water tank 1 as gravitational potential energy, releasing water in the high-level water tank 1 to act on a water turbine 10 once a lubricating oil pump supply system of a turbine 21 cannot work normally, and converting the high-level gravitational potential energy and the kinetic energy into mechanical energy by the water turbine 10 to drive a lubricating oil pump 12 to supply oil normally.
The method adopts a high-level energy storage emergency supply turbine lubricating oil system, as shown in figures 1 and 2, in the system:
1) the original lubricating oil pump supply system of the steam turbine consists of a lubricating oil tank 13 of a lubricating oil system, an alternating-current lubricating oil pump 14, a direct-current lubricating oil pump 15, an oil turbine or oil injector 16, a lubricating oil pump outlet check valve 17, a lubricating oil cooler 18, a lubricating oil filter screen 19 and a main oil pump 20; when the steam turbine 21 is in normal operation and is loaded, the main shaft of the steam turbine 21 drives the main oil pump 20, the main oil pump 20 drives the oil turbine or the oil injector 16 arranged in the lubricating oil tank 13 of the lubricating oil system, one path of the oil turbine or the oil injector supplies lubricating oil to the lubricating oil main pipe, and the other path of the oil turbine or the oil injector supplies oil to the inlet of the main oil pump 20. The ac lubricating oil pump 14 serves as an auxiliary and backup lubricating oil pump when the turbine 21 is started or stopped or when the lubricating oil pressure is low. The dc lubricating oil pump 15 supplies lubricating oil to the turbine 21 by means of a dc power supply provided from a battery when the ac lubricating oil pump 14 fails to start. And outlet check valves 17 are arranged at outlets of the lubricating oil pumps, lubricating oil is supplied to each bearing of the steam turbine 21 through a lubricating oil cooler 18 and a lubricating oil filter screen 19, and the lubricating oil of each bearing returns to a lubricating oil tank 13 of a lubricating oil system through an oil return pipe.
2) The method of the invention designs and installs an effective volume V at the high place of a steam turbine generator unit operating factory building, a boiler factory building or other buildingsHigh-level water tankThe common closed high level water tank 1 has anticorrosive inside the high level water tank 1 and top opening for exhaust, and the high level water tank 1 has high level water level meter 2 to detect water level and bottom level HHigh-level water tankIs high and highThe normal water level of the water level tank 1 is HWater level of water tank. In fact, thermal power plants or thermal power plant turbine thermodynamic systems are equipped with deaerators that use steam to heat condensed water to deaerate, which are themselves a high-level arranged water tank. If the effective water volume and the elevation of the deaerator are reasonably designed, the deaerator can be completely used as the high-level water tank 1 provided by the method.
3) A small-sized water turbine 10 is designed and installed on a zero meter layer of a running plant of a steam turbine generator unit, the water turbine 10 is driven to rotate by water of a high-level water tank 1, the water turbine 10 is horizontally arranged, water inflow is connected with the high-level water tank 1 through a pipeline, and tail water of the water turbine 10 is connected with a tail water pipe and directly discharged into a rainwater well. The water turbine 10 has an inlet central line elevation HAn inletthe design water head of the water turbine 10 is H, the design flow rate is Q, the design efficiency is η, and the rated rotation speed is rWater turbineThe rated power is N.
4) A centrifugal lubricating oil pump 12 is designed and installed on a zero meter layer of a running plant of a turbo generator set, the lubricating oil pump 12 is horizontally arranged in a low position, an inlet of the centrifugal lubricating oil pump is connected into a lubricating oil tank 13 of a lubricating oil system, and an outlet of the centrifugal lubricating oil pump is connected into a pipeline behind a lubricating oil cooler 18 and a lubricating oil filter screen 19 of a crude lubricating oil system through a one-way check valve. The lubricating oil pump 12 is directly and coaxially connected with the water turbine 10 in a horizontal arrangement mode without being driven by a motor, and the rated rotating speed of the lubricating oil pump 12 is rOil pumpRated power NOil pumpRated flow rate of QOil pumpOutlet pressure of POil pump。
5) The flow regulation of the water turbine 10 mainly adopts a self-operated flow regulating valve 8, the regulating valve is an energy-saving control device which does not need external driving energy, relies on the pressure of a regulated medium as a power source and automatically regulates according to a set value, and can normally work in places without electricity or air. Self-operated flow control valve 8 tracks lubricating oil pump 12 outletMouth pressure POil pumpAnd the water flow is controlled to do work through the opening of the regulating valve. Through the design that the flow of the water inlet pipeline is matched with the water turbine 10, the equipment such as the water turbine 10 and the lubricating oil pump 12 can still be ensured to be in a safe working range when the self-operated flow control valve 8 is in the maximum opening degree. When the self-operated flow regulating valve 8 has a fault, the regulating valve bypass stop valve 9 can manually regulate the water inlet flow of the water turbine 10 by people.
6) Because of the small size and high rotation speed of the horizontal small water turbine, a large flywheel 23 is usually added to the main shaft to increase the moment of inertia of the water turbine 10. The water turbine 10 and the lubricating oil pump 12 both adopt self-lubricating rolling bearings 22. If the rated speed r of the water turbine 10 isWater turbineRated speed r of lubricating oil pump 12Oil pumpAnd the two are inconsistent, and the rotating speeds of the two are matched by adopting a simple transmission device 11 such as a main shaft, a gear or a belt.
7) Considering the extreme condition that the whole plant AC power supply, the DC power supply and the compressed air are all invalid, in order to ensure that the method can timely and automatically operate to supply lubricating oil to the steam turbine 21, the pipeline design from the high-level water tank 1 to the water turbine 10 adopts the pneumatic control stop valve 4, the pneumatic control stop valve 4 is an air-closed pneumatic valve, the compressed air is adopted as a power source, the air cylinder is provided with an electromagnetic valve to control the air exhaust of the air cylinder, when the electromagnetic valve is opened and the air cylinder is supplied with air, the compressed air pushes the piston of the air cylinder to overcome the elastic force of a spring to enable the valve to be kept at a fully-closed position, when the electromagnetic valve is closed. The electromagnetic valve can be remotely controlled by an electric signal, and the system interlocking can be realized by putting the electromagnetic valve into the interlocking control of the pressure switch action of the lubricating oil main pipe of the steam turbine to automatically supply lubricating oil to the steam turbine 21. The electromagnetic valve can also be closed manually to control the pneumatic stop valve to be opened quickly. Under the condition that the power supply and the compressed air of the whole plant are all failed, the valve can be quickly and automatically opened when power and air are lost, and the water in the high-level water tank 1 can automatically flow into the water turbine 10 to do work in time. The outlet of the lubricating oil pump 12 adopts a one-way check valve 17, so that lubricating oil is supplied to bearings of the turbine 21 in one way after the oil pump is started.
The output power of the water turbine is related to the inflow and the inflow head, and the calculation formula of the rated output power N is as follows:
N=g×Q×H×η （1）
wherein, N is the rated output power of the water turbine, unit: kW; q is the rated flow designed for the water turbine, unit: m is3H is the designed water head of the water turbine in unit m, η is the efficiency of the water turbine under rated working condition, g is the acceleration of gravity in unit m/s2。
The water in the high-level water tank is used as a driving water source, and the calculation formula of the average water head delta H of the water turbine is as follows:
ΔH=0.5×Hwater level of water tank+HHigh-level water tank-HAn inlet（2）
Wherein HWater level of water tankThe water level is the normal water level when the high-level water tank is used as energy storage standby water, and the unit is as follows: m; hHigh-level water tankThe height mark of the bottom of the high-level water tank is as follows: m; hAn inletThe center line of the inlet pipeline of the water turbine is located at an elevation, unit: and m is selected.
Considering the function of the high-level water tank as energy storage emergency supply turbine lubricating oil, the investment is reduced as much as possible to meet the requirement of the turbine generator on emergency damage of vacuum shutdown and idle running for time tTime of coastingAnd for the reference, the high-level water tank, the water turbine and the lubricating oil pump are subjected to model selection design.
Taking a 660MW supercritical steam turbine generator unit of a certain power plant as an example, a centrifugal lubricating oil pump with the same parameters as the original direct-current lubricating oil pump needs to be added, and the rated power N of the centrifugal lubricating oil pump is knownOil pump37kW, rotation speed 1750r/min and lubricating oil flow 229m3And h, calculating the rated power N of the required water turbine according to the following formula:
N =Noil pump/ηTransmission gear= 37/95%=38.95kW （3）
Wherein,ηtransmission gearFor the transmission efficiency of the hydraulic turbine and the lubricating oil pump transmission device, the transmission efficiency of a common gear/belt transmission device is 92% -97%, and 95% is adopted here.
the design efficiency η of a common small-sized water turbine is 85 percent, and the central line elevation H of the inlet of the water turbineAn inlet1m, the height H of the high level water tankHigh-level water tank40m, normal water level H of water tankWater level of water tankAnd 4m, the calculation formula of the flow Q required by the water turbine obtained by the formulas (1), (2) and (3) is as follows:
Q=N /( g×ΔH×η)= 38.95/(9.80665×41×85%)=0.114 m3/s （4）
the time required for the typical steam turbine to be shut down and lazed away after the emergency damage of the vacuum is 35min, the safety factor is 1.2, and the effective water volume of the high-level water tank is as follows:
Vhigh-level water tank=1.2×3600×Q×tTime of coasting/60=287m3（5）
The data show that for a 660MW supercritical steam turbine generator unit of a certain power plant, a 40m high-position arrangement is designed, and the volume is about 300 m3The left and right high-level energy storage water tanks can meet the requirement of emergency supply of lubricating oil for one turbo generator set.
For a 660MW supercritical steam turbine generator unit, the effective water volume of a deaerator is generally 235 m3The design elevation is 23m, the normal operation water level of the deaerator is 2m, the condensed water in the deaerator is in a saturated water state when the deaerator is in normal full-load operation, the saturation pressure is about 1.0MPa generally, and the saturation temperature is about 180 ℃.
Calculating the average power of the water turbine for doing work in 42min under the normal full-load running state of the deaerator according to the formula (1):
N=9.80665×235×60/(3600×42)×(100+23)×85%=95.6kW （6）
the formula (6) can judge that the power of the saturated water of the deaerator for the water turbine to do work under the normal full-load operation state is enough to meet the requirement of lubricating oil supply for the turbine to urgently destroy the vacuum shutdown and coast away.
Considering the extreme condition that the condensed water in the deaerator is in a normal temperature and normal pressure state when the unit is just started, the deaerator supplies the average power of work of the water turbine within 42min under the operation state:
N=9.80665×235×60/(3600×42)×23×85%=17.8kW （7）
according to the formula (7), it can be judged that the power of the condensed water of the deaerator for the work of the water turbine cannot meet the lubricating oil supply requirement for the steam turbine to break the vacuum shutdown and coast down in case of emergency under the normal-temperature and normal-pressure operation state.
If the deaerator is adopted as the high-level water tank in the method, the elevation of the high-level water tank is increased to 50m under the condition that the effective water volume is not changed according to a formula (3), and the average power of the deaerator for the water turbine to do work is increased within 42min of condensed water of the deaerator under the normal-temperature and normal-pressure operation state:
N=9.80665×235×60/(3600×42)×50×85%=38.7kW （8）
in conclusion, by reasonably designing the effective water volume and elevation of the deaerator, the high-level energy storage emergency supply turbine lubricating oil system can completely utilize the deaerator in the original thermodynamic system, so that the investment of the emergency system is reduced to the maximum extent.
Claims (2)
1. A method for supplying lubricating oil to a steam turbine in an emergency manner by high-level energy storage is characterized by comprising the steps of utilizing water stored in a high-level water tank as gravitational potential energy, releasing the water in the high-level water tank to act on a water turbine once an original lubricating oil system of the steam turbine cannot work normally, converting the high-level gravitational potential energy and the kinetic energy of the water into mechanical energy of the water turbine by the water turbine, and driving a lubricating oil pump to supply oil normally;
the water turbine adopts a horizontal arrangement mode, the inlet water is connected with the high-level water tank through a pipeline, and the tail water of the water turbine is connected with a tail water pipe to directly discharge rainwater wells; the lubricating oil pump is connected with the water turbine through a main shaft or a gear or a belt transmission device in a low-position horizontal arrangement mode, a flywheel is additionally arranged between the lubricating oil pump and the water turbine, an inlet of the lubricating oil pump is connected from the bottom of a lubricating oil tank of an original lubricating oil system, and an outlet of the lubricating oil pump is connected into a pipeline behind a lubricating oil cooler and a lubricating oil filter screen of the original lubricating oil system through a one-way check valve to supply lubricating oil to each bearing of the turbo generator set.
2. The method for emergency supply of turbine lubricating oil through high level energy storage according to claim 1, wherein the releasing of water in the high level water tank to the turbine is signaled by a low pressure switch of a turbine lubricating oil main pipe, the high level water tank is automatically interlocked and opened to a pneumatic control stop valve of the turbine through electromagnetic valve control, or the pneumatic control stop valve of the turbine or a bypass valve thereof is opened by manually controlling the electromagnetic valve by an operator according to actual conditions, or the valve is automatically opened by means of the elastic force of a return spring due to the loss of power source of the pneumatic control stop valve of the turbine when power loss or extreme gas loss occurs in a whole plant.
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| CN111412026B (en) * | 2019-12-10 | 2024-07-12 | 中国电力工程顾问集团华北电力设计院有限公司 | Lubricating oil supply system allowing direct-current accident oil pump motor to start slowly |
| CN112664285A (en) * | 2020-12-31 | 2021-04-16 | 华能南京金陵发电有限公司 | Flexibly-arranged and high-reliability oil supply device for steam turbine unit of water supply pump of power station |
| CN114718670B (en) * | 2022-02-28 | 2024-01-30 | 西安热工研究院有限公司 | Turbine lubrication oil level low protection self-intelligent adaptive identification method, system and equipment |
| CN114934818B (en) * | 2022-05-25 | 2023-09-01 | 西安热工研究院有限公司 | High-level unit, high-level unit operation method and high-level steam turbine system |
| CN115307124B (en) * | 2022-07-11 | 2023-03-17 | 江苏索普新材料科技有限公司 | Safe parking method of sulfur acid production system in power-off state |
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| GB1059304A (en) * | 1965-01-25 | 1967-02-15 | Ass Elect Ind | Improvements in or relating to lubricating systems |
| JPH1130685A (en) * | 1997-07-11 | 1999-02-02 | Toshiba Corp | Emergency core cooling system for nuclear reactor |
| CN201326421Y (en) * | 2008-12-10 | 2009-10-14 | 上海电气电站设备有限公司 | Steam turbine lubricating oil supply device |
| CN202228264U (en) * | 2011-09-28 | 2012-05-23 | 华自科技股份有限公司 | Full-high oil pressure Kaplan turbine control system |
| CN104863648B (en) * | 2015-06-02 | 2016-03-02 | 济南达能动力技术有限责任公司 | A kind of urgent oil supply system of steam driven lubricating pump and method thereof |
| CN205841341U (en) * | 2016-06-24 | 2016-12-28 | 江苏江海润液设备有限公司 | A kind of Accumulator arrangements device being arranged on lubricating system mother's pipe tube outlet |
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2016
- 2016-12-29 CN CN201611240426.XA patent/CN106761971B/en active Active
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