CN206468379U - A kind of device of the emergent supply turbo-engine lube of high-order energy storage - Google Patents
A kind of device of the emergent supply turbo-engine lube of high-order energy storage Download PDFInfo
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- CN206468379U CN206468379U CN201621459083.1U CN201621459083U CN206468379U CN 206468379 U CN206468379 U CN 206468379U CN 201621459083 U CN201621459083 U CN 201621459083U CN 206468379 U CN206468379 U CN 206468379U
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Abstract
The utility model discloses a kind of device of the emergent supply turbo-engine lube of high-order energy storage, in grease pump including elevated tank, by setting the hydraulic turbine that the water pipe of valve is connected with elevated tank and being connected with the hydraulic turbine, the grease pump feed system of the grease pump access steam turbine.The utility model provides a set of gravitional force of being set up without electric power by working medium of water as the oil feeding device of drive energy for large-size steam turbine; 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, it is to avoid occur serious steam turbine oil-break burning accident.
Description
Technical field
The utility model belongs to steam turbine, and in particular to a kind of device of the emergent supply turbo-engine lube of high-order energy storage.
Background technology
Large-size steam turbine is in the widely used key equipment of the industries such as thermal power plant, nuclear power plant.This large-scale rotation
Mechanical typically to use sliding bearing, steam turbine original lubricating oil supply and interlocking protective system are as follows：When steam turbine is normally run, by
Turbine spindle drives main oil pump or AC Lub oil pump to provide enough lubricating oil to each bearing, and lubricating oil system is also configured
There is battery to provide the last guarantee that the DC lubricating of dc source fails as unit AC Lub oil pump, lubricate in addition
Oil system also has the low value of steam-turbine lubrication oil pressure or steam turbine tripping operation interlocking AC Lub oil pump, low two-value interlocked startup
The virtual protections such as DC lubricating.
Although turbo-engine lube supplies and protected system configuration standby alternating current and direct current grease pump and interlock protection system
System, the reason for still having large turbine-generator set oil-break burning accident, accident in actual production mainly have exchange, directly
Stream grease pump housing build-up of air causes oil pump short time decompression, oil-break, and alternating current and direct current power-fail or Oil pump electrical machinery are closed
Lock unsuccessfully causes non lubricant oil pump operation oil-break, and operation operates not in place or interlocking protective system failure to cause lubricating oil pressure low
Not starting to block inside alternating current and direct current grease pump, lubricating oil system filter screen, oil cooler in time causes oil circuit to interrupt and tile kilning
Deng.
Therefore, the existing lubricating oil supply of steam turbine and protection system still suffer from certain oil-break tile kilning potential safety hazard, are anti-
Only oil-break burning accident occurs for steam turbine, and National Energy Board promulgates new edition in April, 2014《Prevent the 25 of power generation accident
Item important requirement》In the 8.4.1 articles regulation：" steam turbine should configure the lubricating oil accumulator of enough capacity（Such as top petrol tank）, one
Denier grease pump and system jam, accumulator can guarantee that unit safety shut down, do not occur bearing shell burn out, bearing wear ".It is high
Position fuel tank is mainly used in the equipment such as compressor in petrochemical industry, metallurgy industry, factory steam turbine, but domestic large-size steam turbine is not
The experience and achievement for have high-order energy storage tank design, actually putting into operation, and ensure the lubrication of large-size steam turbine safe shutdown coasting operation
Oil mass be the equipment such as compressor, industrial steam turbine several times so that more than ten times, using 600MW thermal power plants Turbo-generator Set as
Example, high-order energy storage fuel tank must be necessarily arranged at more than Turbo-generator Set firing floor 5~8m positions, to meet during unit safety coasting operation
Between lubricating oil total measurement (volume) about 120m needed for 35min3, and steam turbine factory building bottom must configure the low level fuel tank of same volume
The lubricants capacity arranged with receiving under top petrol tank, in addition high-order energy storage oil tank system also need to oil level monitoring, smoke evacuation system, oil and follow
The auxiliary facilities such as ring, oil purification, fire-fighting, whole system investment is huge.Top petrol tank is arranged in steam turbine factory building, turbine generator
On unit operating platform, high-rating generator is all to fill inflammable and explosive hydrogen operation, and top petrol tank is major-minor to steam turbine factory building
Equipment or even whole power plant bring huge fire or explosion safety risk.
Utility model content
The purpose of this utility model is to provide a kind of safe and simple, economic high-order energy storage emergent supply steam turbine profit
The device of lubricating oil.
Realize that the technical scheme that the utility model purpose is used is as follows：
The device for the emergent supply turbo-engine lube of high-order energy storage that the utility model is provided, including elevated tank, pass through
If the hydraulic turbine that the water pipe of valve is connected with elevated tank and the grease pump being connected with the hydraulic turbine, the grease pump access vapour
In the grease pump feed system of turbine.
The grease pump from grease-box bottom suck lubricating oil, by lubricating pipe to Turbo-generator Set each
Bearing supplies lubricating oil.
The valve is pneumatic control stop valve.
The elevated tank can use the oxygen-eliminating device of thermodynamic system of steam tur.
The utility model acts on the hydraulic turbine by the water discharged in elevated tank and drives grease pump, so as to steam turbine
Lubricating oil is supplied, can be put into operation in the following manner：One is that the action of turbo-engine lube main-piping pressure low switch sends letter
Number, by solenoid valve control automatic interlock open elevated tank to hydraulic turbine pneumatic control stop valve, two be can by run people
Member controls magnetic valve to open pneumatic control stop valve or its bypass valve manually according to actual conditions, three be when occur full factory's dead electricity or
When losing the extreme cases such as gas, because pneumatic control stop valve runs out of steam source so as to automatically open up valve by back-moving spring elastic force
Door.
Compared with prior art, the beneficial effects of the utility model are as follows：
1）The utility model device uses elevated tank, makes full use of water flow by gravity principle and passive thought to construct
A set of brand-new fuel feeding emergency system, has abandoned fuel feeding emergency system using generator and the traditional mode of electronic device, one
Denier occurs power cut of whole factory, Oil pump electrical machinery and starts the extreme cases such as failure, compressed gas source failure, without other extraneous electric power, sources of the gas,
The present apparatus timely automated can put into operation, it is possible to prevente effectively from Turbo-generator Set oil-break burning accident occurs.The utility model
The gravitional force and kinetic energy of water are converted into mechanical energy by device, simplify system, automation can be achieved in system input need not
Human intervention, while avoiding mechanical energy and electric energy, the next efficiency reduction of zone of transformation and system reliability reduction etc. are unfavorable repeatedly
Factor.
2）The utility model device can be using common water as energy-accumulating medium, and water tank, pipeline are ordinary carbon steel material,
Hydraulic turbine draining can directly discharge catch-basin, and can make full use of former unit oxygen-eliminating device and lubricating oil system, only increase
One hydraulic turbine and centrifugal oil pump, whole emergency system investment are small, and pollution-free, enforceability is strong, and maintenance cost is low, and not
There is fire disaster or explosion safety hidden danger that top petrol tank energy-storage system is brought.
3）The fuel feeding emergency system that the utility model device is built also has the low defencive function of anti-grease-box oil level, by
The grease pump suction inlet configured in the former lubricating oil system of steam turbine has certain height away from grease-box bottom, once hair
Raw system oil accident, when grease-box oil level is near or below former grease pump suction inlet crude oil pump can not normal output will
Generation oil-break tile kilning.The utility model device accesses grease pump low position, oil pump import from grease-box bottom, so
Design can make full use of lubricating oil system existing equipment, without extra increase grease-box and lubricating oil, also ensure simultaneously
Grease-box oil level still can be to each bearing shell normal supply lubricating oil of steam turbine when relatively low.
The utility model device provides for large-size steam turbine and a set of sets up gravitional force by working medium of water without electric power
It is used as the oil feeding device of drive energy, it can be ensured that whole in the alternating current and direct current grease pump of the original configuration of steam turbine
In the case of failure, there is last a set of lube plant directly to provide the axle that Turbine Safety shuts down coasting operation using mechanical energy
Bearing lubrication oil amount, it is to avoid occur serious steam turbine oil-break burning accident.
The utility model both can be used for transformation of the existing hydroturbine lubrication oil for system, it can also be used to which new equipment is set
Meter.
The technical solution of the utility model is further illustrated below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is steam-turbine lubrication oil pump feed system schematic flow sheet.
Fig. 2 is the hydraulic turbine and lubricating oil pump group schematic diagram in the utility model device.
In figure, 1 is elevated tank, and 2 be elevated tank water-level gauge, and 3 be ball valve before pneumatic stopping valve, and 4 be that pneumatic control is cut
Only valve, 5 be ball valve after pneumatic stopping valve, and 6 be pneumatic stopping valve bypass ball valve, and 7 be stop valve before regulating valve, and 8 be self-operated type stream
Adjustable valve, 9 be regulating valve bypass stop valve, and 10 be the hydraulic turbine, and 11 be the transmission devices such as main shaft or gear or belt, 12 be from
Core type grease pump, 13 be lubricating oil system grease-box, and 14 be AC Lub oil pump, and 15 be DC lubricating, and 16 be oil
Turbine or oil ejector, 17 be grease pump outlet non-return valve, and 18 be lubricating oil oil cooler, and 19 be lubricating oil strainer, and 20 be steamer
Owner's oil pump, 21 be steam turbine, and 22 be the self-lubricating bearing of the hydraulic turbine and grease pump, and 23 be flywheel.
Embodiment
See Fig. 1, Fig. 2, the device of the emergent supply turbo-engine lube of the high-order energy storage that the utility model is provided, including a high position
Water tank 1, by set the hydraulic turbine 10 that the water pipe of air to close pneumatic control stop valve 4 is connected with elevated tank 1 and with the hydraulic turbine 10
In the grease pump 12 of connection, the grease pump feed system of the access of banjo lubrication oil pump 12 steam turbine 21, lubricating oil
Pump 12 sucks lubricating oil from the bottom of lubricating oil system grease-box 13, is supplied by lubricating pipe to each bearing of steam turbine 21
To lubricating oil；The pneumatic control stop valve 4 is electrically connected by automatic interlock with turbo-engine lube main-piping pressure switch, pneumatic
Control stop valve is automatically opened up in the case of the source of running out of steam by back-moving spring.
The original grease pump feed system of steam turbine shown in Fig. 1, by lubricating oil system grease-box 13, exchange lubricating oil
Pump 14, DC lubricating 15, oil impeller or oil ejector 16, grease pump outlet non-return valve 17, lubricating oil oil cooler 18, lubrication
Oil screen 19, main oil pump 20 are constituted；When steam turbine 21 normally runs on-load, the main shaft drives main oil pump 20 of steam turbine 21, main oil
Pump 20 drives the oil impeller or the road direction lubricating oil main pipe of oil ejector 16 1 of arrangement in lubricating oil system grease-box 13 to supply lubricating oil,
The import fuel feeding of one road direction main oil pump 20.When AC Lub oil pump 14 is opened, shut down as steam turbine 21 or when lubricating oil pressure is low
Auxiliary, emergency bearing oil pump.DC lubricating 15 AC Lub oil pump 14 start failure when by battery provide it is straight
Stream power supply supplies lubricating oil to steam turbine 21.Grease pump outlet is designed with outlet non-return valve 17, and lubricating oil is through lubricating oil oil cooler
18th, to steam turbine 21, each bearing supplies lubricating oil after lubricating oil strainer 19, and the lubricating oil of each bearing is back to profit through oil return pipe
Oil tank 13.
The utility model device runs factory building, boiler factory building or other building eminence design and installations in Turbo-generator Set
One dischargeable capacity is VElevated tankCommon enclosed elevated tank 1, the inside of elevated tank 1 carries out preservative treatment, open top supply and discharge
Gas, elevated tank 1 sets the detection cistern water level of elevated tank water-level gauge 2, and its elevation of bottom is HElevated tank, the ordinary water level of elevated tank 1
Highly it is HCistern water level.In fact, thermal power plant or nuclear power plant's thermodynamic system of steam tur are equipped with oxygen-eliminating device, oxygen-eliminating device utilizes steam
Heating deoxygenation is carried out to condensate, itself is exactly the water tank of a high-order arrangement.If the effective water capacity and mark of oxygen-eliminating device
High reasonable in design, then oxygen-eliminating device can be used as the elevated tank 1 in the utility model device completely.
Zero meter of the factory building small hydraulic turbine 10 of layer design and installation one is run in Turbo-generator Set, the hydraulic turbine 10 is by high-order
The water-driven rotation of water tank 1, the hydraulic turbine 10 uses horizontal arrangement, and water inlet is connected by pipeline with elevated tank 1, the hydraulic turbine
10 tail water connect draft tube and directly arrange catch-basin.The import center line absolute altitude of the hydraulic turbine 10 is HImport, the design head of the hydraulic turbine 10 is H,
Design discharge is Q, and design efficiency is η, and rated speed is rThe hydraulic turbine, rated power is N.
Zero meter of the factory building banjo lubrication oil pump 12 of layer design and installation one is run in Turbo-generator Set, grease pump 12 is adopted
With the horizontal arrangement of low level, its entrance is accessed from the bottom of grease-box 13, and outlet accesses former lubricating oil system by one way stop peturn valve
Pipeline after lubricating oil oil cooler 18 and lubricating oil strainer 19, this design can ensure still can be tight in fuel tank low oil level
Anxious fuel feeding, can also avoid the lubricating oil oil-break that former lubricating oil strainer 19 or lubricating oil oil cooler 18 are blocked or oil circuit interruption occurs
Burning accident.Grease pump 12 drives without motor, couples using horizontal arrangement and the hydraulic turbine 10 are directly coaxial, lubricates
The rated speed of oil pump 12 is rOil pump, rated power is NOil pump, metered flow is QOil pump, outlet pressure is POil pump。
The Flow-rate adjustment of the hydraulic turbine 10 mainly uses self-operated flow regulator 8, and this kind of regulating valve is a kind of without additional
Drive energy, by being power source by the tune medium pressure of itself, the power saving controller automatically adjusted by setting value,
Can be without electricity, the place normal work without gas.The tracking grease pump 12 of self-operated flow regulator 8 outlet pressure POil pump, pass through
Controlling opening of valve control water-carrying capacity acting.Pass through inlet channel flow and the matched design of the hydraulic turbine 10, Self-operated flow regulation
It still ensure that the equipment such as the hydraulic turbine 10, grease pump 12 in range of safety operation during 8 maximum opening of valve.When self-operated type stream
During 8 failure of adjustable valve, regulating valve bypass stop valve 9 can pass through the artificial flow of inlet water for adjusting the hydraulic turbine 10 manually.
Because Horizontal small turbine size is small, rotating speed is high, increase a larger flywheel 23 generally on main shaft to improve
The rotary inertia of the hydraulic turbine 10.The hydraulic turbine 10 uses self-lubricating bearing 22 with grease pump 12.If the volume of the hydraulic turbine 10
Determine rotating speed rThe hydraulic turbineWith the rated speed r of grease pump 12Oil pumpInconsistent, both are driven using simple main shaft or gear or belt etc.
Device 11 matches both rotating speeds.
The extreme case all failed in view of full factory's AC power, dc source, compressed air, to ensure that this practicality is new
Type device can in time, automatic running supply lubricating oil to steam turbine 21, elevated tank 1 to the pipe design of the hydraulic turbine 10 uses gas
Dynamic control stop valve 4, pneumatic control stop valve 4 is air to close pneumatic operated valve, and using compressed air as power source, cylinder sets electricity
Magnet valve controls cylinder exhaust, and when magnetic valve opening, cylinder intake, compressed air pusher cylinder piston overpowers spring force makes valve
Door keeps fully closed position, and the cylinder exhaust when closed electromagnetic valve, back-moving spring makes valve quickly keep standard-sized sheet position by spring force.Electricity
Magnet valve can be by electric signal remote control, and putting into turbo-engine lube main-piping pressure switch motion interlocked control magnetic valve can
To realize that system interlock supplies lubricating oil from trend steam turbine 21.Magnetic valve can also control pneumatic stopping valve by manual-lock
It is quick to open.Under full factory's power supply, the compressed air all extreme case such as failure, the type valve dead electricity, mistake gas can be quick
Automatic standard-sized sheet, it is ensured that the water of elevated tank 1 can do work from the inflow hydraulic turbine 10 in time.Stopped using unidirectional the outlet of grease pump 12
Return valve 17, it is ensured that each bearing oil of unidirectional steam supply turbine 21 after pump start.
The power output of the hydraulic turbine is relevant with flow of inlet water, water inlet head, and its rated output power N calculation formula is such as
Under：
N=g×Q×H×η （1）
Wherein, N is hydraulic turbine rated output power, unit：kW；Q is Design of Hydraulic Turbine metered flow, unit：m3/s；H
For the design head of the hydraulic turbine, unit：m；η is the efficiency under hydraulic turbine declared working condition, unit：%；G is acceleration of gravity, single
Position：m/s2。
Using the water of elevated tank as driving water source, the average water head Δ H of hydraulic turbine calculation formula is as follows：
ΔH=0.5×HCistern water level+HElevated tank-HImport（2）
Wherein, HCistern water levelOrdinary water level for elevated tank as energy storage when standby, unit：m；HElevated tankFor elevated tank bottom
Absolute altitude residing for portion, unit：m；HImportAbsolute altitude, unit residing for hydraulic turbine inlet pipeline center line：m.
The function of turbo-engine lube is promptly supplied as energy storage in view of elevated tank, is invested for reduction as far as possible, with full
Sufficient steam turbine generator promptly destroys vacuum and shuts down t the time required to coasting operationIdling timeOn the basis of, to elevated tank, the hydraulic turbine and lubrication
Oil pump carries out Selection and Design.
By taking one 660MW supercritical turbine generator group of certain power plant as an example, one need to be increased and joined with former DC lubricating
Number identical banjo lubrication oil pump, it is known that its rated power NOil pumpFor 37kW, rotating speed 1750r/min, flow of lubrication 229m3/
H, then the rated power N of required hydraulic turbine calculation formula is as follows：
N =NOil pump/ηTransmission= 37/95%=38.95kW （3）
Wherein, ηTransmissionFor the transmission efficiency of the hydraulic turbine and grease pump transmission device, general gear/belt drive unit
Transmission efficiency is 92%~97%, and 95% is taken here.
The design efficiency η of general small hydraulic turbine is 85%, hydraulic turbine import center line absolute altitude HImportFor 1m, elevated tank is set
Count absolute altitude HElevated tankFor 40m, water tank ordinary water level HCistern water levelFor 4m, then by formula（1）、（2）、（3）Flow Q needed for drawing the hydraulic turbine
Calculation formula be：
Q=N /( g×ΔH×η)= 38.95/(9.80665×41×85%)=0.114 m3/s （4）
It is 35min that general steam turbine, which is promptly destroyed the time required to vacuum shuts down coasting operation, and it is 1.2 to take safety coefficient, then high-order
Effective water capacity of water tank is：
VElevated tank=1.2×3600×Q×tIdling time/60=287m3（5）
It can be drawn by data above, for one 660MW supercritical turbine generator group of certain power plant, design a 40m
High position arrangement, the m of volume about 3003The high-order energy-accumulating water tank of left and right can meet the emergent supply lubrication of a Turbo-generator Set
Oil.
For a 660MW supercritical turbine generator group, effective water capacity of its general oxygen-eliminating device is 235 m3, design
Absolute altitude 23m, the normal operating water level 2m of oxygen-eliminating device, condensate when normal full load is run in oxygen-eliminating device are saturated-water phase, its
Saturation pressure is generally 1.0MPa or so, 180 DEG C or so of saturation temperature.
According to formula（1）, calculate the average work(of water supply turbine acting in 42min under oxygen-eliminating device normal full load running status
Rate：
N=9.80665×235×60/(3600×42)×(100+23)×85%=95.6kW （6）
By formula（6）It may determine that, the work(that its saturation water water supply turbine does work under oxygen-eliminating device normal full load running status
Rate meets the lubricating oil fuel feeding that steam turbine is promptly destroyed needed for vacuum shutdown coasting operation enough.
Extreme case when condensate when just starting in view of unit in oxygen-eliminating device is normal temperature and pressure state, oxygen-eliminating device exists
The mean power that water supply turbine does work in 42min under the running status：
N=9.80665×235×60/(3600×42)×23×85%=17.8kW （7）
By formula（7）It may determine that, the power that its condensate water supply turbine does work under oxygen-eliminating device normal temperature and pressure running status
The lubricating oil fuel feeding that steam turbine is promptly destroyed needed for vacuum shutdown coasting operation can not be met.
If using oxygen-eliminating device as the elevated tank described in the utility model device, according to formula（3）, in its effective water
The situation of the constancy of volume, its absolute altitude is carried to 50m, then supplied water under oxygen-eliminating device normal temperature and pressure running status in its condensate 42min
The mean power of turbine acting：
N=9.80665×235×60/(3600×42)×50×85%=38.7kW （8）
In summary, by rationally designing the effective water capacity and absolute altitude of oxygen-eliminating device, a high position described in the utility model device
The emergent supply turbine oil system of energy storage can be answered using the oxygen-eliminating device in former therrmodynamic system with reducing to greatest extent completely
The investment of anxious system.
Claims (5)
1. the device of the emergent supply turbo-engine lube of a kind of high-order energy storage, it is characterized in that including elevated tank, by setting valve
The water pipe hydraulic turbine being connected with elevated tank and the grease pump being connected with the hydraulic turbine, grease pump access steam turbine
In grease pump feed system.
2. the device of the emergent supply turbo-engine lube of high-order energy storage according to claim 1, it is characterized in that the lubrication
Oil pump sucks lubricating oil from grease-box bottom, and by lubricating pipe, to Turbo-generator Set, each bearing supplies lubricating oil.
3. the device of the emergent supply turbo-engine lube of high-order energy storage according to claim 1 or 2, it is characterized in that the valve
Door is pneumatic control stop valve.
4. the device of the emergent supply turbo-engine lube of high-order energy storage according to claim 1, it is characterized in that the high position
Water tank is the oxygen-eliminating device of thermodynamic system of steam tur.
5. the device of the emergent supply turbo-engine lube of high-order energy storage according to claim 3, it is characterized in that the high position
Water tank is the indispensable oxygen-eliminating device of thermodynamic system of steam tur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621459083.1U CN206468379U (en) | 2016-12-29 | 2016-12-29 | A kind of device of the emergent supply turbo-engine lube of high-order energy storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621459083.1U CN206468379U (en) | 2016-12-29 | 2016-12-29 | A kind of device of the emergent supply turbo-engine lube of high-order energy storage |
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| Publication Number | Publication Date |
|---|---|
| CN206468379U true CN206468379U (en) | 2017-09-05 |
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ID=59712020
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621459083.1U Active CN206468379U (en) | 2016-12-29 | 2016-12-29 | A kind of device of the emergent supply turbo-engine lube of high-order energy storage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153460A (en) * | 2021-01-26 | 2021-07-23 | 东方电气集团东方汽轮机有限公司 | High-level oil tank system for turbine lubricating oil |
-
2016
- 2016-12-29 CN CN201621459083.1U patent/CN206468379U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153460A (en) * | 2021-01-26 | 2021-07-23 | 东方电气集团东方汽轮机有限公司 | High-level oil tank system for turbine lubricating oil |
| CN113153460B (en) * | 2021-01-26 | 2022-03-25 | 东方电气集团东方汽轮机有限公司 | High-level oil tank system for turbine lubricating oil |
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