CN110332017A - A kind of adaptive shaft seal steam supply system - Google Patents
A kind of adaptive shaft seal steam supply system Download PDFInfo
- Publication number
- CN110332017A CN110332017A CN201910729582.XA CN201910729582A CN110332017A CN 110332017 A CN110332017 A CN 110332017A CN 201910729582 A CN201910729582 A CN 201910729582A CN 110332017 A CN110332017 A CN 110332017A
- Authority
- CN
- China
- Prior art keywords
- axle envelope
- steam supply
- shaft seal
- branch
- main pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 5
- 210000004907 gland Anatomy 0.000 description 7
- 230000008646 thermal stress Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 229940023184 after bite Drugs 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- VNFVKWMKVDOSKT-LREBCSMRSA-N (2r,3r)-2,3-dihydroxybutanedioic acid;piperazine Chemical compound C1CNCCN1.OC(=O)[C@H](O)[C@@H](O)C(O)=O VNFVKWMKVDOSKT-LREBCSMRSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention discloses a kind of adaptive shaft seal steam supply system, steam supply branch, overflow branch, bypass pneumatic branch, high pressure cylinder axle envelope, intermediate pressure cylinder axle envelope and low pressure (LP) cylinder axle envelope are adjusted including axle envelope main pipe, door rod gas leakage, axle envelope main pipe arrival end is provided with auxiliary steam regulating valve, axle envelope main pipe arrival end adjusts steam supply branch, overflow branch and bypass pneumatic branch with door rod gas leakage respectively and is connected to, and axle envelope main pipe outlet end is connected to high pressure cylinder axle envelope rear shaft seal, intermediate pressure cylinder axle envelope rear shaft seal respectively.Adaptive shaft seal steam supply system provided by the invention, when unit starting, after steam supply breaks down, leakage vapour check-valves two sides pressure difference increases, and differential pressure transmitter closes door rod gas leakage and adjusts steam supply branch regulating valve, prevents steam supply from interrupting；When self-sealing operating condition, shaft seal steam pressure increase, differential pressure transmitter opens door rod gas leakage and adjusts steam supply branch regulating valve, prevents shaft seal steam pipeline superpressure, adjusts valve regulation vapor (steam) temperature by auxiliary steam, increases the safety and fault-resistant ability of this system.
Description
Technical field
The present invention relates to steam turbine equipment technical field, in particular to a kind of adaptive shaft seal steam supply system.
Background technique
Supercritical unit generallys use high pressure and divides cylinder structure, in particular by the middle unit for pressing single diversion design, high pressure
Cylinder, before and after intermediate pressure cylinder at axle envelope temperature of rotor difference very big operation when high pressure cylinder before temperature of rotor at axle envelope before axle envelope, intermediate pressure cylinder
It is higher, and temperature of rotor is lower at high pressure cylinder rear shaft seal and intermediate pressure cylinder rear shaft seal, avoids the diameter of axle in hot, very hot startup
Thermal stress is excessive, and axle envelope send stripping temperature that should match with temperature of rotor, otherwise will affect rotor life, more likely big axis locking.
Power plant's shaft seal steam generallys use auxiliary steam as shaft seal steam vapour source, and it is high can to meet hot and very hot startup
The steam supply temperature requirement of cylinder pressure rear shaft seal, intermediate pressure cylinder rear shaft seal, but axle envelope before axle envelope and intermediate pressure cylinder is unable to satisfy before high pressure cylinder
The requirement of high temperature steam supply, conventional power unit rely primarily on main steam station steam supply or in auxiliary steam in hot and very hot startup
It stands and electric heater offer high temperature vapour source is provided, although this mode system is simple, high, intermediate pressure cylinder each packing can only be mentioned
For a kind of for stripping temperature, independent temperature matching cannot be carried out to axle envelope before high, intermediate pressure cylinder and height, intermediate pressure cylinder rear shaft seal, according to normal
The main steam station steam supply of rule increases the scheme of electric heater at auxiliary steam station, and axle envelope does not send stripping temperature and temperature of rotor not
It is still prominent with problem, fail the temperature matching for fundamentally solving temperature of rotor and shaft seal steam.
Therefore, how to avoid diameter of axle thermal stress excessive, be those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The object of the present invention is to provide a kind of adaptive shaft seal steam supply system, it is excessive to can be avoided diameter of axle thermal stress, prevents
Big axis locking, reduces rotor life loss.
In order to solve the above technical problems, the present invention provides a kind of adaptive shaft seal steam supply system, including axle envelope main pipe, door rod
Gas leakage adjusts steam supply branch, overflow branch, bypass pneumatic branch, high pressure cylinder axle envelope, intermediate pressure cylinder axle envelope and low pressure (LP) cylinder axle envelope, described
The arrival end of axle envelope main pipe is provided with auxiliary steam regulating valve, and the arrival end of the axle envelope main pipe respectively with the door rod gas leakage
Adjusting steam supply branch, the overflow branch are connected to the bypass pneumatic branch, for the axle envelope main pipe and auxiliary steam station
Connection, the rear shaft seal that the outlet end of the axle envelope main pipe is sealed with the rear shaft seal of the high pressure cylinder axle envelope, medium pressure cylinder shaft respectively
Connection.
It preferably, further include direct-contact desuperheater, the direct-contact desuperheater is arranged on the axle envelope main pipe branch road.
Preferably, spray water control valve is provided on the water supply pipe of the direct-contact desuperheater.
Preferably, safety valve is provided in the axle envelope main pipe.
Preferably, overflow valve is provided in the axle envelope main pipe.
Preferably, bypass pneumatic operated valve is provided on the bypass pneumatic branch.
It preferably, further include gas leakage check-valves, the high pressure cylinder axle envelope and medium pressure cylinder shaft envelope pass through the gas leakage
Check-valves is connected to the axle envelope main pipe.
It preferably, further include being set to door rod gas leakage to adjust steam supply branch road differential pressure transmitter, the differential pressure transmitter connection
Lock the bypass pneumatic operated valve opening and closing.
It preferably, further include the shaft sealing cooler being connected to the gas leakage main pipe of the low pressure (LP) cylinder axle envelope.
Preferably, an at least the stalk exhaust fan is provided on the shaft sealing cooler.
Adaptive shaft seal steam supply system provided by the present invention mainly includes axle envelope main pipe, door rod gas leakage adjusting steam supply branch
Road, overflow branch, bypass pneumatic branch, high pressure cylinder axle envelope, intermediate pressure cylinder axle envelope and low pressure (LP) cylinder axle envelope, the arrival end of axle envelope main pipe are set
It is equipped with auxiliary steam regulating valve, and the arrival end of axle envelope main pipe adjusts steam supply branch, overflow branch and side with door rod gas leakage respectively
Logical pneumatic branch connection, so that axle envelope main pipe is connected to auxiliary steam station, the outlet end of axle envelope main pipe respectively with high pressure cylinder axle envelope
Rear shaft seal, intermediate pressure cylinder axle envelope rear shaft seal connection.Adaptive shaft seal steam supply system provided by the invention, in unit starting operating condition
When, auxiliary steam supply breaks down after bite, and auxiliary steam supply leakage vapour check-valves two sides pressure difference increases, and differential pressure transmitter sender closes door
Bar gas leakage adjusts the regulating valve of steam supply branch, prevents steam supply from interrupting, cold air leaks into cylinder；In self-sealing operating condition, axle envelope is supplied
When steam pressure increases, differential pressure transmitter sender opens the regulating valve that door rod gas leakage adjusts steam supply branch, prevents shaft seal steam pipeline
Superpressure increases the safety and fault-resistant ability of this system.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of overall structure diagram of specific embodiment provided by the present invention.
Wherein, in Fig. 1:
Axle envelope main pipe -1, door rod gas leakage adjust steam supply branch -2, and overflow branch -3 bypass pneumatic branch -4, high pressure
Cylinder shaft envelope -5, intermediate pressure cylinder axle envelope -6, low pressure (LP) cylinder axle envelope -7, direct-contact desuperheater -8, auxiliary steam regulating valve -9, safety
Valve -10 leaks vapour check-valves -11, differential pressure transmitter -12, overflow valve -13, shaft sealing cooler -14.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of overall structure diagram of specific embodiment provided by the present invention.
In a kind of specific embodiment provided by the present invention, adaptive shaft seal steam supply system mainly includes axle envelope main pipe
1, door rod gas leakage adjusts steam supply branch 2, overflow branch 3, bypass pneumatic branch 4, high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 and low pressure
Cylinder shaft envelope 7, the arrival end of axle envelope main pipe 1 is provided with auxiliary steam regulating valve 9, and the arrival end of axle envelope main pipe 1 respectively with door rod
Gas leakage adjusts steam supply branch 2, overflow branch 3 is connected to bypass pneumatic branch 4, so that axle envelope main pipe 1 is connected to auxiliary steam station,
The outlet end of axle envelope main pipe 1 is connected to the rear shaft seal of the rear shaft seal of high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 respectively.
Wherein, the arrival end of axle envelope main pipe 1 is provided with auxiliary steam regulating valve 9, and auxiliary steam regulating valve 9 is auxiliary for adjusting
The temperature for the steam for helping steam station to be passed through, the arrival end of axle envelope main pipe 1 adjust steam supply branch 2, overflow branch with door rod gas leakage respectively
Road 3 is connected to bypass pneumatic branch 4, and door rod gas leakage adjusts steam supply branch 2, overflow branch 3 and bypass pneumatic branch 4 and is used for
The temperature and pressure for the steam being passed through to auxiliary steam station is completed under the different start operating performance of unit, the steam of axle envelope main pipe 1 enters
It is mouthful disconnected to be connected to auxiliary steam station, the steam (vapor) outlet end of axle envelope main pipe 1 respectively with the rear shaft seal of high pressure cylinder axle envelope 5, intermediate pressure cylinder axis
The rear shaft seal connection of envelope 6.
In actual unit running process, when unit is in cold start operating condition, auxiliary steam passes through auxiliary steam
Regulating valve 9 is directly supplied to high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 in axle envelope main pipe 1 after steam progress pressure and temperature adjusting
Vapour, steam turbine is in cold conditions unlatching at this time, and the temperature of low pressure (LP) cylinder axle envelope 7 is lower, is reduced vapor (steam) temperature by direct-contact desuperheater 8
To 7 steam supply of low pressure (LP) cylinder axle envelope after the temperature needed to low pressure (LP) cylinder axle envelope 7, safety valve, overflow valve are spare, complete the steam to unit
Demand.
When unit hot and very hot state shut down operating condition when, due to the operating condition of unit, high pressure cylinder axle envelope 5, in
Cylinder pressure axle envelope 6 is in the condition of high temperature, at this point, door rod gas leakage, which adjusts steam supply branch 2, ensures intermediate pressure main stop valve, middle pressure pitch, height
Cylinder pressure axle envelope 5, intermediate pressure cylinder axle envelope 6 are isolated with cold air, cold water, avoid high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope due to being in high temperature
6 meet with cold air, cold water causes big axis locking, and after handling great question, unit can start under hot and very hot state operating condition,
At this point, high pressure cylinder axle envelope 5,6 temperature of intermediate pressure cylinder axle envelope will not reduce or reduce seldom, door rod gas leakage adjust steam supply branch 2 to
Axle envelope main pipe 1 gives high pressure cylinder axle envelope 5, the direct steam supply of intermediate pressure cylinder axle envelope 6, and steam turbine is in hot and interlocks auxiliary steam tune at this time
Valve 9, bypass 4 set-pressure of pneumatic branch are saved, will be reduced to what low pressure (LP) cylinder axle envelope 7 needed for stripping temperature by direct-contact desuperheater 8
7 steam supply of low pressure (LP) cylinder axle envelope is given after temperature, safety valve 10, overflow branch 3 are spare.
In unit depth peak regulation self-sealing operating condition, auxiliary steam regulating valve 9 is closed, high pressure cylinder axle envelope 5, intermediate pressure cylinder axis
Envelope 6 is in leakage vaporous state, and the leakage vapour that door rod gas leakage adjusts steam supply branch 2, high pressure cylinder axle envelope 5 and intermediate pressure cylinder axle envelope 6 passes through leakage vapour
Check-valves 11 arrives axle envelope main pipe 1, and differential pressure transmitter 12 monitors leakage steam pressure difference, and interlocking door rod gas leakage adjusts the tune of steam supply branch 2
It saves valve to open, will be reduced to after the temperature that low pressure (LP) cylinder axle envelope 7 needs for stripping temperature to low pressure (LP) cylinder axle envelope 7 by direct-contact desuperheater 8
Steam supply, safety valve 10, overflow branch 3 are spare.
In unit self-sealing operating condition, auxiliary steam regulating valve 9 is closed, and high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 are in
Vaporous state is leaked, gland packing leakage by leakage vapour check-valves 11 arrives axle envelope main pipe 1 before axle envelope and intermediate pressure cylinder axle envelope 6 before high pressure cylinder axle envelope 5,
Differential pressure transmitter 12 monitors leakage steam pressure difference, and the regulating valve that interlocking door rod gas leakage adjusts steam supply branch 2 is opened, and passes through spray desuperheating
Device 8 will be reduced to after the temperature that low pressure (LP) cylinder axle envelope 7 needs for stripping temperature to 7 steam supply of low pressure (LP) cylinder axle envelope, and overflow valve 13 is opened, by axis
The adjusting of 1 steam inside of main pipe is sealed to setting value, safety valve 10 is spare.
In order to optimize the advantages of adaptive shaft seal steam supply system more preferably can carry out steam for unit in above-described embodiment,
Adaptive shaft seal steam supply system further includes direct-contact desuperheater 8, and the setting of direct-contact desuperheater 8 connects in axle envelope main pipe 1 and low pressure (LP) cylinder axle envelope 7
Logical branch road.Because of the unstability of unit, unit may be started under different operating conditions, for example, unit is opened in cold conditions
It starts building condition, auxiliary steam carries out after pressure and temperature adjusting to height steam in axle envelope main pipe 1 by auxiliary steam regulating valve 9
Cylinder pressure axle envelope 5, the direct steam supply of intermediate pressure cylinder axle envelope 6, steam turbine is in cold conditions unlatching at this time, and the temperature of low pressure (LP) cylinder axle envelope 7 is lower, leads to
It crosses direct-contact desuperheater 8 vapor (steam) temperature is reduced to after the temperature that low pressure (LP) cylinder axle envelope 7 needs to 7 steam supply of low pressure (LP) cylinder axle envelope, safety valve,
Overflow valve is spare, completes the steam demand to unit；In another example unit shuts down operating condition in hot and very hot state, due to unit
Operating condition reason, high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 are in the condition of high temperature, at this point, door rod gas leakage adjusts steam supply branch 2
Ensure that intermediate pressure main stop valve, middle pressure pitch, high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 are isolated with cold air, cold water, avoids due in height
High pressure cylinder axle envelope 5, the intermediate pressure cylinder axle envelope 6 of temperature are met with cold air, cold water causes big axis locking, after handling great question, unit
It can start under hot and very hot state operating condition, at this point, high pressure cylinder axle envelope 5,6 temperature of intermediate pressure cylinder axle envelope will not be reduced or be reduced very
Few, door rod gas leakage adjusting steam supply branch 2 to axle envelope main pipe 1 gives high pressure cylinder axle envelope 5, the direct steam supply of intermediate pressure cylinder axle envelope 6, at this time steamer
Machine is in hot and interlocks auxiliary steam regulating valve 9, bypass 4 set-pressure of pneumatic branch, will be for steam temperature by direct-contact desuperheater 8
Degree is reduced to after the temperature of the needs of low pressure (LP) cylinder axle envelope 7 to 7 steam supply of low pressure (LP) cylinder axle envelope, and safety valve 10, overflow branch 3 are spare, pass through
Door rod gas leakage adjusts steam supply branch 2 to axle envelope before axle envelope, intermediate pressure cylinder axle envelope 6 before high pressure cylinder axle envelope 5 and to 5 rear axle of high pressure cylinder axle envelope
Envelope, 6 rear shaft seal of intermediate pressure cylinder axle envelope carry out independent temperature matching, and by direct-contact desuperheater 8 can for low pressure (LP) cylinder axle envelope 7 provide it is low
The steam on warm ground, avoids diameter of axle thermal stress excessive, prevents big axis locking, reduces rotor life loss.
Further, spray water control valve is provided on the water supply pipe of direct-contact desuperheater 8.Due to unit operating condition not
Together, there are many operation and start operating performances, so, the temperature of high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 and low pressure (LP) cylinder axle envelope 7
Difference has height to have low, therefore, is meeting the same of the temperature requirements of high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 and low pressure (LP) cylinder axle envelope 7
When, spray water control valve is added on the water supply pipe of direct-contact desuperheater 8, the temperature regulating range of steam can be made more extensive,
Preferably meet the temperature requirements of high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 and low pressure (LP) cylinder axle envelope 7.
Further, safety valve is provided in axle envelope main pipe 1；Overflow valve is provided in axle envelope main pipe 1.The pressure of gland seal system
Power and temperature control are to automatically control, which provides gland steam to host and feed pump turbine, are equipped with axial seal pressure certainly
It is dynamic to adjust device, overflow pressure relief device and axle envelope air extractor, permanent vapor filter, axle envelope are equipped at axle envelope vapor inlet
Steam-using system includes electronic barrier valve, pressure reducing valve, bypass valve, relief valve and the other valves and instrument of shaft seal steam source switching
Table, desuperheat equipment and related auxiliary device etc., system header vapor 1 are additionally provided with a safety valve 10, can be adjusted by safety valve 10
The pressure of 1 steam inside of header vapor is saved, the efficiency for adjusting 1 steam pressure of header vapor is improved, pressure of steam supply can be prevented excessively high
And jeopardize unit safety.
Further, it bypasses on pneumatic branch 4 and is provided with bypass pneumatic operated valve.The bypass pneumatic operated valve for bypassing pneumatic branch 4 can
With the pressure of 1 steam inside of auxiliary adjustment axle envelope main pipe, the pressure of 1 steam inside of axle envelope main pipe is adjusted on demand, is improved
The stability of 1 internal vapor pressure of axle envelope main pipe, ensure that unit safety, steadily runs.
Further, adaptive shaft seal steam supply system further includes gas leakage check-valves 11, door rod gas leakage, 5 and of high pressure cylinder axle envelope
Intermediate pressure cylinder axle envelope 6 is connected to by the gas leakage check-valves with axle envelope main pipe 1.For example, in unit self-sealing operating condition, auxiliary steam tune
It saves valve 9 to close, high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 are in leakage vaporous state, axle envelope and intermediate pressure cylinder axle envelope 6 before high pressure cylinder axle envelope 5
Preceding gland packing leakage arrives axle envelope main pipe 1 by leakage vapour check-valves 11, and differential pressure transmitter 12 monitors leakage steam pressure difference, interlocks door rod gas leakage
The regulating valve for adjusting steam supply branch 2 is opened, and will be reduced to the temperature that low pressure (LP) cylinder axle envelope 7 needs for stripping temperature by direct-contact desuperheater 8
7 steam supply of low pressure (LP) cylinder axle envelope is given after degree, overflow valve 13 is opened, and by 1 steam inside of axle envelope main pipe adjusting to setting value, safety valve 10 is standby
With.The setting of gas leakage check-valves 11 can make unit in self-sealing operating condition, avoid high pressure cylinder axle envelope 5,6 steam of intermediate pressure cylinder axle envelope
Leakage, so that steam is returned to axle envelope main pipe 1, save the demand again that unit restarts steam, reduce unit operating cost.
Further, adaptive shaft seal steam supply system further includes being set to door rod gas leakage to adjust differential pressure change on steam supply branch 2
Device 8 is sent, differential pressure transmitter 8 interlocks the bypass pneumatic operated valve opening and closing.For example, unit shuts down operating condition in hot and very hot state, due to
The operating condition reason of unit, high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 are in the condition of high temperature, supply at this point, door rod gas leakage is adjusted
Vapour branch 2 ensures that intermediate pressure main stop valve, middle pressure pitch, high pressure cylinder axle envelope 5, intermediate pressure cylinder axle envelope 6 are isolated with cold air, cold water, avoid by
Cause big axis locking in meeting in the high pressure cylinder axle envelope 5 of high temperature, intermediate pressure cylinder axle envelope 6 and cold air, cold water, when processing great question it
Afterwards, unit can start under hot and very hot state operating condition, at this point, high pressure cylinder axle envelope 5,6 temperature of intermediate pressure cylinder axle envelope will not reduce or
Person reduces seldom, and door rod gas leakage adjusting steam supply branch 2 to axle envelope main pipe 1 gives high pressure cylinder axle envelope 5, the direct steam supply of intermediate pressure cylinder axle envelope 6,
Steam turbine is in hot and interlocks auxiliary steam regulating valve 9, bypass 4 set-pressure of pneumatic branch at this time, passes through direct-contact desuperheater 8
It will be reduced to after the temperature that low pressure (LP) cylinder axle envelope 7 needs for stripping temperature to 7 steam supply of low pressure (LP) cylinder axle envelope, safety valve 10, overflow branch 3 are standby
With.The setting of differential pressure transmitter 8 improves the adjusting efficiency of 1 internal vapor pressure of axle envelope main pipe, is examined by differential pressure transmitter 8
The vapor pressure differential measured, feedback arrive control system, are timely adjusted, and improve the effect for adjusting 1 steam pressure of axle envelope main pipe
Rate can prevent pressure of steam supply excessively high and jeopardize unit safety.
Further, adaptive shaft seal steam supply system further includes that the axle envelope that is connected to the gas leakage main pipe of low pressure (LP) cylinder axle envelope 7 is cold
But device 14；An at least the stalk exhaust fan is provided on shaft sealing cooler 14.In addition the gland steam that 100% capacity is arranged is cold
But the axis of device, two 100% capacity adds blower, and to the incoagulable gas being discharged in gland steam cooler, two electronic
Air exhauster mutual backup improves the guarantee of unit safety, stable operation.
In conclusion adaptive shaft seal steam supply system provided by the present embodiment mainly includes axle envelope main pipe, door rod gas leakage
Adjust steam supply branch, overflow branch, bypass pneumatic branch, high pressure cylinder axle envelope, intermediate pressure cylinder axle envelope and low pressure (LP) cylinder axle envelope, axle envelope main pipe
Arrival end be provided with auxiliary steam regulating valve, and the arrival end of axle envelope main pipe adjusts steam supply branch with door rod gas leakage respectively, overflows
Stream branch and bypass pneumatic branch be connected to, so that axle envelope main pipe is connected to auxiliary steam station, the outlet end of axle envelope main pipe respectively with
The rear shaft seal connection of the rear shaft seal, intermediate pressure cylinder axle envelope of high pressure cylinder axle envelope.Adaptive shaft seal steam supply system provided by the invention, in machine
When group start operating performance, auxiliary steam supply breaks down after bite, and auxiliary steam supply leakage vapour check-valves two sides pressure difference increases, differential pressure transmitter
Sender closes the regulating valve that door rod gas leakage adjusts steam supply branch, prevents steam supply from interrupting, cold air leaks into cylinder；In self-sealing operating condition
When, when shaft seal steam pressure increase, differential pressure transmitter sender opens the regulating valve that door rod gas leakage adjusts steam supply branch, prevents axle envelope
Steam supply pipeline superpressure increases the safety and fault-resistant ability of this system.The sealing system starts to oepration at full load from unit,
Overall process can be switched over automatically by unit gland sealing steam supply requirement；Self-sealing sealing system has simple, safe and reliable, work
The advantages that condition adaptability is good.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of adaptive shaft seal steam supply system, which is characterized in that adjust steam supply branch including axle envelope main pipe (1), door rod gas leakage
(2), overflow branch (3), bypass pneumatic branch (4), high pressure cylinder axle envelope (5), intermediate pressure cylinder axle envelope (6) and low pressure (LP) cylinder axle envelope (7), institute
The arrival end for stating axle envelope main pipe (1) is provided with auxiliary steam regulating valve (9), and the arrival end of the axle envelope main pipe (1) respectively with
The door rod gas leakage adjusts steam supply branch (2), the overflow branch (3) is connected to the bypass pneumatic branch (4), for described
Axle envelope main pipe (1) is connected to auxiliary steam station, the outlet end of the axle envelope main pipe (1) respectively with the high pressure cylinder axle envelope (5)
The rear shaft seal connection of rear shaft seal, medium pressure cylinder shaft envelope (6).
2. adaptive shaft seal steam supply system according to claim 1, which is characterized in that further include direct-contact desuperheater (8), institute
Direct-contact desuperheater (8) setting is stated in axle envelope main pipe (1) the branch road.
3. adaptive shaft seal steam supply system according to claim 2, which is characterized in that the confession of the direct-contact desuperheater (8)
Spray water control valve is provided in water lines.
4. adaptive shaft seal steam supply system according to claim 1, which is characterized in that be arranged on the axle envelope main pipe (1)
There are safety valve (10).
5. adaptive shaft seal steam supply system according to claim 4, which is characterized in that be arranged on the axle envelope main pipe (1)
There are overflow valve (13).
6. adaptive shaft seal steam supply system according to claim 5, which is characterized in that on the bypass pneumatic branch (4)
It is provided with bypass pneumatic operated valve.
7. adaptive shaft seal steam supply system according to claim 1, which is characterized in that it further include gas leakage check-valves, it is described
High pressure cylinder axle envelope (5) and medium pressure cylinder shaft envelope (6) are connected to by the gas leakage check-valves with the axle envelope main pipe (1).
8. adaptive shaft seal steam supply system according to claim 1, which is characterized in that further include being set to door rod gas leakage tune
Differential pressure transmitter (12) on steam supply branch (2) is saved, the differential pressure transmitter (12) interlocks the bypass pneumatic operated valve opening and closing.
9. adaptive shaft seal steam supply system according to claim 1, which is characterized in that further include and the low pressure (LP) cylinder axle envelope
(7) shaft sealing cooler (14) of gas leakage main pipe connection.
10. adaptive shaft seal steam supply system according to claim 1, which is characterized in that be arranged on the shaft sealing cooler
There is an at least the stalk exhaust fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910729582.XA CN110332017B (en) | 2019-08-08 | 2019-08-08 | Self-adaptive shaft seal steam supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910729582.XA CN110332017B (en) | 2019-08-08 | 2019-08-08 | Self-adaptive shaft seal steam supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110332017A true CN110332017A (en) | 2019-10-15 |
| CN110332017B CN110332017B (en) | 2022-04-22 |
Family
ID=68148883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910729582.XA Active CN110332017B (en) | 2019-08-08 | 2019-08-08 | Self-adaptive shaft seal steam supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110332017B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576377A (en) * | 2020-12-07 | 2021-03-30 | 中国航发沈阳发动机研究所 | Aeroengine bearing seals bleed structure |
| CN112855942A (en) * | 2020-12-28 | 2021-05-28 | 东方电气集团东方汽轮机有限公司 | Shaft end sealing system of closed type circulating rotating machine |
| CN112879111A (en) * | 2021-01-19 | 2021-06-01 | 北京龙威发电技术有限公司 | Steam seal leakage cooling system of supercritical back pressure steam turbine |
| CN114112411A (en) * | 2021-10-30 | 2022-03-01 | 国家能源集团华北电力有限公司廊坊热电厂 | Steam turbine shaft seal system state monitoring system and method |
| CN114635758A (en) * | 2022-02-28 | 2022-06-17 | 西安热工研究院有限公司 | Ultra-supercritical unit shaft seal system and operation method |
| CN114687814A (en) * | 2020-12-25 | 2022-07-01 | 上海电气电站设备有限公司 | Steam seal cooler device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246284A (en) * | 2017-06-27 | 2017-10-13 | 东方电气集团东方汽轮机有限公司 | A kind of shaft seal steam supply system of extra-supercritical unit containing electric heater |
| CN107605541A (en) * | 2017-09-27 | 2018-01-19 | 山东中实易通集团有限公司 | Prevent 1000MW supercritical turbine packings from seizing axle envelope electric heater system and method |
| US20180066534A1 (en) * | 2016-09-07 | 2018-03-08 | General Electric Company | Turbomachine temperature control system |
| CN108561190A (en) * | 2018-06-30 | 2018-09-21 | 神华国华广投（柳州）发电有限责任公司 | A kind of steam turbine gland system |
| CN208040456U (en) * | 2018-04-03 | 2018-11-02 | 中国神华能源股份有限公司 | Steam turbine and its gland steam system |
-
2019
- 2019-08-08 CN CN201910729582.XA patent/CN110332017B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180066534A1 (en) * | 2016-09-07 | 2018-03-08 | General Electric Company | Turbomachine temperature control system |
| CN107246284A (en) * | 2017-06-27 | 2017-10-13 | 东方电气集团东方汽轮机有限公司 | A kind of shaft seal steam supply system of extra-supercritical unit containing electric heater |
| CN107605541A (en) * | 2017-09-27 | 2018-01-19 | 山东中实易通集团有限公司 | Prevent 1000MW supercritical turbine packings from seizing axle envelope electric heater system and method |
| CN208040456U (en) * | 2018-04-03 | 2018-11-02 | 中国神华能源股份有限公司 | Steam turbine and its gland steam system |
| CN108561190A (en) * | 2018-06-30 | 2018-09-21 | 神华国华广投（柳州）发电有限责任公司 | A kind of steam turbine gland system |
Non-Patent Citations (1)
| Title |
|---|
| 西安电力高等专科学校，大唐韩城第二发电有限责任公司: "《600MW火电机组培训教材 汽轮机分册》", 31 May 2006, 中国电力出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576377A (en) * | 2020-12-07 | 2021-03-30 | 中国航发沈阳发动机研究所 | Aeroengine bearing seals bleed structure |
| CN114687814A (en) * | 2020-12-25 | 2022-07-01 | 上海电气电站设备有限公司 | Steam seal cooler device |
| CN112855942A (en) * | 2020-12-28 | 2021-05-28 | 东方电气集团东方汽轮机有限公司 | Shaft end sealing system of closed type circulating rotating machine |
| CN112855942B (en) * | 2020-12-28 | 2022-04-12 | 东方电气集团东方汽轮机有限公司 | Shaft end sealing system of closed type circulating rotating machine |
| CN112879111A (en) * | 2021-01-19 | 2021-06-01 | 北京龙威发电技术有限公司 | Steam seal leakage cooling system of supercritical back pressure steam turbine |
| CN114112411A (en) * | 2021-10-30 | 2022-03-01 | 国家能源集团华北电力有限公司廊坊热电厂 | Steam turbine shaft seal system state monitoring system and method |
| CN114112411B (en) * | 2021-10-30 | 2023-09-08 | 国家能源集团华北电力有限公司廊坊热电厂 | Steam turbine shaft seal system state monitoring system and method |
| CN114635758A (en) * | 2022-02-28 | 2022-06-17 | 西安热工研究院有限公司 | Ultra-supercritical unit shaft seal system and operation method |
| CN114635758B (en) * | 2022-02-28 | 2024-05-07 | 西安热工研究院有限公司 | Ultra-supercritical unit shaft seal system and operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110332017B (en) | 2022-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110332017A (en) | A kind of adaptive shaft seal steam supply system | |
| CN110219707B (en) | Control and protection method for zero output of low pressure cylinder of double-low pressure cylinder steam turbine | |
| CN106194297A (en) | The double branch road heating system of a kind of cogeneration turbine | |
| CN206035552U (en) | Cogeneration vapour turbine system | |
| CN206267896U (en) | Combined cycle two-shipper condensing-back pressure formula is drawn gas cogeneration system | |
| CN108868921A (en) | A kind of large size pure condensed steam formula Turbo-generator Set heating system and heat supply method | |
| CN108506057A (en) | A kind of co-generation unit and adjusting method for cutting off low pressure (LP) cylinder into vapour | |
| CN207583439U (en) | Prevent 1000MW supercritical pressure turbine packings from seizing shaft seal heater system | |
| CN207145026U (en) | Combined Cycle Unit steam turbine quickly starts warming-up system | |
| CN110500148B (en) | High-back-pressure heat supply and monitoring method and system for large steam turbine generator unit | |
| CN107605541A (en) | Prevent 1000MW supercritical turbine packings from seizing axle envelope electric heater system and method | |
| CN210239765U (en) | Safe energy-saving steam extraction and heat supply system capable of flexibly adjusting steam inlet of low-pressure cylinder | |
| CN208518719U (en) | A kind of large size pure condensed steam formula Turbo-generator Set heating system | |
| CN107246284A (en) | A kind of shaft seal steam supply system of extra-supercritical unit containing electric heater | |
| CN114233416B (en) | Dynamically-reconstructed steam turbine generator unit and operation method | |
| CN108104888B (en) | Power grid frequency modulation system and method based on frequency modulation bypass | |
| CN104405459A (en) | Backpressure machine acting and heat supply device for steam exhaust heat supply network of intermediate pressure cylinder of steam turbine | |
| CN108104887A (en) | The therrmodynamic system of double reheat | |
| CN110454241A (en) | A kind of turbine steam pressure matcher and device driving function with power generation or electricity | |
| CN110307044A (en) | A kind of steamturbine booster | |
| CN106887265A (en) | The start and stop shut-down system of one bulb bed modular high temperature gas cooled reactor | |
| CN104454038A (en) | System and method for starting double-reheat stream turbine | |
| CN206190339U (en) | Two branch road heating system of cogeneration steam turbine | |
| CN208138012U (en) | A kind of co-generation unit for cutting off low pressure (LP) cylinder into vapour | |
| CN211008788U (en) | Water seal type low pressure heater drainage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200508 Address after: No. 10, Huanghe East Road, Zhengdong New District, Zhengzhou City, Henan Province Applicant after: State Power Investment Group Henan Electric Power Co., Ltd Applicant after: TECHNOLOGY INFORMATION CENTER OF STATE POWER INVESTMENT CORPORATION HENAN POWER Co.,Ltd. Address before: 450001 No. 100 Gas Power Plant of Wutong Street, Zhengzhou High-tech Development Zone, Zhengzhou City, Henan Province Applicant before: TECHNOLOGY INFORMATION CENTER OF STATE POWER INVESTMENT CORPORATION HENAN POWER Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |