CN106121740B - A kind of shaft seal steam supply system - Google Patents
A kind of shaft seal steam supply system Download PDFInfo
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- CN106121740B CN106121740B CN201610465218.3A CN201610465218A CN106121740B CN 106121740 B CN106121740 B CN 106121740B CN 201610465218 A CN201610465218 A CN 201610465218A CN 106121740 B CN106121740 B CN 106121740B
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- Prior art keywords
- valve
- shaft seal
- steam
- connects
- seal steam
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a kind of shaft seal steam supply systems, are mainly formed including boiler steam pipe, heat supply main pipe, the first shaft seal steam device, the second shaft seal steam device and the 3rd shaft seal steam device；It is characterized in that：Above-mentioned three sets of shaft seal steam devices are equipped among boiler steam pipe and heat supply main pipe, heat supply main pipe tail end is equipped with valve, and steam supply is for users to use.It is an advantage of the invention that：For two road shaft seal steam sources there are problem, a shaft seal steam source is most nearby connect from the machine from heat supply main pipe；This road steam pressure is conveniently operated adjustment temperature 300 or so, without desuperheat with regard to that can meet axle envelope vapour requirement in 20 times or so that 0.6mpa or so is axle envelope steam pressure, in unit starting, initial steam can be closed during with this road steam, in day-to-day operation, keep this road stand-by state.
Description
Technical field
The invention belongs to a kind of steam turbine technology fields, are specially a kind of shaft seal steam supply system.
Background technology
Steam turbine is the external combustion rotary machinery that steam thermal energy can be converted into mechanical work, and the steam from boiler enters vapour
After turbine, successively by the nozzle and movable vane of a series of loop configurations, the thermal energy of steam is converted into turbine rotor rotation
Mechanical energy.Steam carries out energy conversion in different ways in steam turbine, just constitutes the steam turbine of different operating principle.
An important factor for during steam turbine operation works, vacuum is a very important coefficient, and shaft seal steam is an influence vacuum
One of, and this factor is embodied in the overall process of operation, is such as started, daily operation adjustment accident treatment, shut down etc..
Between 0.003-0.03MPa between i.e. 3-30kpa, temperature controls between 150-260 DEG C the generally requirement of shaft seal steam pressure.
Though steam supply operation is small skill, very important, because shaft seal steam deficiency will make vacuum decay influence safety, axis
The too urgent excess of gland sealing steam supply will be damaged axle envelope, when serious, will beat inclined shaft envelope, be allowed to friction and big axis is caused to overheat, generate vibration,
Even more serious, equal axle envelope complete wear（It shaves clearly）It causes a large amount of gas leakage of axle envelope uneconomical, makes to make band in oil into vapour in bearing oil
Water emulsification causes to adjust security department's set corrosion bite, causes major safety risks.Since axle envelope is sleeved in cylinder, it is necessary to take off cylinder
The axle envelope for replacing damage can be overhauled, time and effort consuming, economic loss is big, so being operated for shaft seal steam, it is necessary to draw attention, have
Necessity is gone into seriously.
It is insufficient and inconvenient existing for shaft seal design installation at present；Present shaft seal steam comes from surge tank, and presses
Case comes bis- tunnels of Qi You, all the way from initial steam, all the way before the machine one takes out electrically operated valve.First say initial steam all the way：It is new to steam
Vapour comes from boiler, and superheated steam pressure is high, about 4.6Mpa or so, after high 470 DEG C or so of temperature first must depressurize reducing pressure by regulating flow, supplies
Axle envelope vapour, since pressure is 150 times or so of shaft seal steam pressure, this road vapor (steam) temperature is high, it is necessary to cold water or condensation
Water desuperheat, it is complicated and inconvenient.Besides axis steam is all the way, since this road steam is before one axis electrically operated gate of the machine, before start
It cannot be used at one axis of the machine or under vacuum state, in load carrying, after general band 15%-20% rated loads, the axle envelope of the machine
Leakage vapour is entirely capable of meeting shaft seal steam requirement, although a pumping pressure is available at this time, has not needed, thus this road is useless
's.
The content of the invention
It is an object of the invention to provide a kind of shaft seal steam supply system, by analyzing above, for two road shaft seal steams come
Source most nearby connects a shaft seal steam source from heat supply main pipe there are problem from the machine.
The present invention adopts the following technical scheme that：A kind of shaft seal steam supply system, it is mainly female including boiler steam pipe, heat supply
Pipe, the first shaft seal steam device, the second shaft seal steam device and the 3rd shaft seal steam device composition；It is characterized in that：Boiler steams
Above-mentioned three sets of shaft seal steam devices are equipped among steam pipe road and heat supply main pipe, heat supply main pipe tail end is equipped with valve, and vapour supply is used
Family uses；The first shaft seal steam device is made of several valves, high pressure cylinder, surge tank；It is connect under the boiler steam pipe
First valve A, first valve A the second valves of connection are divided into two tunnels after the second valve, connect to connect after the first valve B all the way and press
Case, another way are divided into two tunnels, and surge tank is connected after connecing the 3rd valve all the way, connect high pressure cylinder all the way, and high pressure cylinder connects the 4th valve,
4th valve connects surge tank, and meet the first valve C, the first valve C under heat supply main pipe connects surge tank after meeting the first valve D again,
Two tunnels of the high pressure cylinder point connected valve and connect surge tank all the way, and another way connects the 5th valve, and the 5th valve connects the 6th valve
Door, the 6th valve connection heat supply main pipe；The second shaft seal steam device is made of several valves, intermediate pressure cylinder；The boiler steams
The first valve E, the first valve E is met under steam pipe road and connects the 7th valve, the 7th valve connects the 8th valve, pressed in the connection of the 8th valve
Cylinder, intermediate pressure cylinder connect the 9th valve, and the 9th valve connects the first valve F, the first valve F connection heat supply main pipes；3rd axle envelope supplies
Vapour device is made of several valves, high pressure cylinder, surge tank；The first shaft seal steam device is by several valves, high pressure cylinder, press
Case forms；Meet the first valve A under the boiler steam pipe, first valve A the second valves of connection are divided into two after the second valve
Road connects surge tank after meeting the first valve B all the way, and another way is divided into two tunnels, connects surge tank after connecing the 3rd valve all the way, all the way
High pressure cylinder is connected, high pressure cylinder connects the 4th valve, and the 4th valve connects surge tank, the first valve C, the first valve are connect under heat supply main pipe
C connects surge tank after meeting the first valve D again, and two tunnels of the high pressure cylinder point connected valve and connect surge tank, another way connection all the way
5th valve, the 5th valve connect the 6th valve, the 6th valve connection heat supply main pipe.
Manometer there are one being set between first shaft seal steam device of the present invention, first valve and the 3rd valve.
Manometer there are one being set between 3rd shaft seal steam device of the present invention, first valve and the 3rd valve.
First valve A of the present invention, the first valve B, the first valve C, the first valve D, the first valve E, the first valve F
For admission valve, directly it is connected on boiler steam pipe and heat supply main pipe.
Second valve of the present invention is automatic throttle.
3rd valve of the present invention is axle envelope valve before high pressure cylinder.
4th valve of the present invention is high pressure cylinder rear shaft seal valve.
5th valve of the present invention is axis electrically operated valve.
6th valve of the present invention is gas outlet valve door.
7th valve of the present invention subtracts entrance electrically operated valve to be double.
8th valve of the present invention subtracts pressure regulating valve to be double.
9th valve of the present invention subtracts outlet electric valve door to be double.
It is an advantage of the invention that：For two road shaft seal steam sources there are problem, from heat supply main pipe from the machine most nearby
Connect a shaft seal steam source；This road steam pressure is conveniently operated adjustment temperature in 20 times or so that 0.6mpa or so is axle envelope steam pressure
Degree is 300 or so, and without desuperheat with regard to that can meet axle envelope vapour requirement, in unit starting, with this road steam when can be by initial steam
It closes, in day-to-day operation, keeps this road stand-by state.It remains about 20kpa to press against, when ensureing large area load and left alone without help machine
It comes into operation in time, even if hot starting, hot start after the left alone without help machine of unit, also can be used；The urgent left alone without help machine and during hot starting, hot start of unit, is steamed once again with new
When vapour supplies axle envelope vapour, this road steam is without closing, and also it goes without doing the change of other original pipelines, installation workload is relatively not
Greatly.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Boiler steam pipe 1, heat supply main pipe 2, the first shaft seal steam device 3,4 and of the second shaft seal steam device in the figure
3rd shaft seal steam device 5, valve 6, the first valve 7 connect the second valve 8, surge tank 9, the 3rd valve 10, high pressure cylinder 11, and
Four valves 12, the 5th valve 13, the 6th valve 14, the 7th valve 15, the 8th valve 16, intermediate pressure cylinder 17, the 9th valve 18;It surveys
Pressure meter 19.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment is used for
Illustrate the present invention, but cannot be used for limiting the scope of the invention.
In the description of the present invention, unless otherwise indicated, " multiple " are meant that two or more；Term " on ",
" under ", "left", "right", " interior ", " outer ", " front end ", " rear end ", " head ", the orientation of the instructions such as " afterbody " or position relationship be
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or dark
Show that signified device or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. be only used for description purpose, and it is not intended that instruction or
Imply relative importance.
In the description of the present invention, it is necessary to which explanation, unless otherwise clearly defined and limited, term " connected " " connects
Connect " it should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can be machine
Tool is connected or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary.
For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood with concrete condition
Meaning.
A kind of shaft seal steam supply system mainly includes boiler steam pipe 1, heat supply main pipe 2, the first shaft seal steam device 3, the
Two shaft seal steam devices 4 and the 3rd shaft seal steam device 5 form；It is characterized in that：In boiler steam pipe 1 and heat supply main pipe 2
Between be equipped with above-mentioned three sets shaft seal steam devices, heat supply main pipe tail end is equipped with valve 6, and steam supply is for users to use.
First shaft seal steam device of the present invention is made of several valves, high pressure cylinder, surge tank；The Boiler Steam pipe
The first valve 7 is connect under road 1, the first valve 7 connects the second valve 8, is divided into two tunnels after the second valve 8, after connecing the first valve 7 all the way
Surge tank 9 is connected, another way is divided into two tunnels, and surge tank 9 is connected after connecing the 3rd valve 10 all the way, connects high pressure cylinder 11 all the way, high
Cylinder pressure 11 connects the 4th valve 12, and the 4th valve 12 connects surge tank 9, connects the first valve 7 under heat supply main pipe 2, the first valve 7 connects again
Surge tank 9 is connected after first valve 7, the high pressure cylinder 11 divides two tunnels, connected valve all the way and connects surge tank 9, another way connection
5th valve 13, the 5th valve 13 connect the 6th valve 14, the 6th valve 14 connection heat supply main pipe 2；The second shaft seal steam dress
4 are put to be made of several valves, intermediate pressure cylinder；The first valve 7 is connect under the boiler steam pipe 1, the first valve 7 connects the 7th valve
15, the 7th valve 15 connects the 8th valve 16, the 8th valve 16 connection intermediate pressure cylinder 17, and intermediate pressure cylinder 17 connects the 9th valve 18, the 9th valve
Door 18 connects the first valve 7, the first valve 7 connection heat supply main pipe 2；The 3rd shaft seal steam device by several valves, high pressure cylinder,
Surge tank forms；Connect the first valve 7 under the boiler steam pipe 1, the first valve 7 connects the second valve 8, after the second valve 8
It is divided into two tunnels, surge tank 9 is connected after connecing the first valve 7 all the way, another way is divided into two tunnels, is connected after connecing the 3rd valve 10 all the way
Case 9 is pressed, connects high pressure cylinder 11 all the way, high pressure cylinder 11 connects the 4th valve 12, the 4th valve 12 connection surge tank 9, under heat supply main pipe 2
The first valve 7 is connect, the first valve 7 connects surge tank 9 after connecing the first valve 7 again, and the high pressure cylinder 11 divides two tunnels, connected all the way
Valve connects surge tank 9, and another way connects the 5th valve 13, and the 5th valve 13 connects the 6th valve 14, the connection heat supply of the 6th valve 14
Main pipe 2.
Manometer 19 there are one being set between first shaft seal steam device of the present invention, first valve and the 3rd valve；Institute
State manometer there are one being set between the 3rd the first valve of shaft seal steam device and the 3rd valve；First valve is inlet valve
Door, is directly connected on boiler steam pipe and heat supply main pipe；Second valve is automatic throttle；3rd valve is height
Axle envelope valve before cylinder pressure；4th valve is high pressure cylinder rear shaft seal valve；5th valve is axis electrically operated valve；Described
Six valves are gas outlet valve door；7th valve subtracts entrance electrically operated valve to be double；8th valve subtracts pressure regulating valve to be double；Institute
It states the 9th valve and subtracts outlet electric valve door to be double.
Claims (5)
1. a kind of shaft seal steam supply system, mainly including boiler steam pipe, heat supply main pipe, the first shaft seal steam device, the second axis
Gland sealing steam supply device and the 3rd shaft seal steam device composition；It is characterized in that：It is equipped among boiler steam pipe and heat supply main pipe upper
Three sets of shaft seal steam devices are stated, heat supply main pipe tail end is equipped with valve, and steam supply is for users to use；The first shaft seal steam device
It is made of several valves, high pressure cylinder, surge tank, the first valve A, the first valve A connections second is connect under the boiler steam pipe
Valve is divided into two tunnels after the second valve, connects surge tank after meeting the first valve B all the way, another way is divided into two tunnels, connects the 3rd all the way
Surge tank is connected after valve, connects high pressure cylinder all the way, high pressure cylinder connects the 4th valve, the 4th valve connection surge tank, heat supply main pipe
Under meet the first valve C, the first valve C connects surge tank after meeting the first valve D again, and two tunnels of the high pressure cylinder point pass through valve all the way
Door connects surge tank, and another way connects the 5th valve, and the 5th valve connects the 6th valve, the 6th valve connection heat supply main pipe；Described
Two shaft seal steam devices are made of several valves, intermediate pressure cylinder, and the first valve E is met under the boiler steam pipe, and the first valve E connects
7th valve, the 7th valve connect the 8th valve, the 8th valve connection intermediate pressure cylinder, and intermediate pressure cylinder connects the 9th valve, and the 9th valve connects the
One valve F, the first valve F connection heat supply main pipes；The 3rd shaft seal steam device is by several valves, high pressure cylinder, surge tank group
Into the 3rd shaft seal steam device is identical with the first shaft seal steam device composition.
2. a kind of shaft seal steam supply system according to claim 1, it is characterised in that：The first shaft seal steam device first
Manometer there are one being set between valve B and the 3rd valve.
3. a kind of shaft seal steam supply system according to claim 1, it is characterised in that：The first valve A, the first valve B,
First valve C, the first valve D, the first valve E, the first valve F are admission valve, are directly connected on boiler steam pipe and heat supply
In main pipe；Second valve is automatic throttle.
4. a kind of shaft seal steam supply system according to claim 1, it is characterised in that：3rd valve is high pressure cylinder front axle
Seal valve；4th valve is high pressure cylinder rear shaft seal valve；5th valve is axis electrically operated valve；6th valve is
Gas outlet valve door.
5. a kind of shaft seal steam supply system according to claim 1, it is characterised in that：7th valve subtracts entrance electricity to be double
Movable valve；8th valve subtracts pressure regulating valve to be double；9th valve subtracts outlet electric valve door to be double.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465218.3A CN106121740B (en) | 2016-06-24 | 2016-06-24 | A kind of shaft seal steam supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465218.3A CN106121740B (en) | 2016-06-24 | 2016-06-24 | A kind of shaft seal steam supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106121740A CN106121740A (en) | 2016-11-16 |
| CN106121740B true CN106121740B (en) | 2018-05-22 |
Family
ID=57268276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610465218.3A Active CN106121740B (en) | 2016-06-24 | 2016-06-24 | A kind of shaft seal steam supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106121740B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3604206A (en) * | 1968-07-31 | 1971-09-14 | Gen Electric | Shaft-sealing system for nuclear turbines |
| CN201301730Y (en) * | 2008-10-30 | 2009-09-02 | 中国长江动力公司(集团) | Steam seal pressure adjusting device for steam seal system of turbine |
| CN203547804U (en) * | 2013-11-12 | 2014-04-16 | 万逵芳 | Airtight turbine shaft seal system |
| CN205135725U (en) * | 2015-10-14 | 2016-04-06 | 大唐保定热电厂 | Power plant's unit bearing seal supplies vapour device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001227303A (en) * | 2000-02-15 | 2001-08-24 | Fuji Electric Co Ltd | Shaft sealing device of steam turbine |
-
2016
- 2016-06-24 CN CN201610465218.3A patent/CN106121740B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3604206A (en) * | 1968-07-31 | 1971-09-14 | Gen Electric | Shaft-sealing system for nuclear turbines |
| CN201301730Y (en) * | 2008-10-30 | 2009-09-02 | 中国长江动力公司(集团) | Steam seal pressure adjusting device for steam seal system of turbine |
| CN203547804U (en) * | 2013-11-12 | 2014-04-16 | 万逵芳 | Airtight turbine shaft seal system |
| CN205135725U (en) * | 2015-10-14 | 2016-04-06 | 大唐保定热电厂 | Power plant's unit bearing seal supplies vapour device |
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| Publication number | Publication date |
|---|---|
| CN106121740A (en) | 2016-11-16 |
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Effective date of registration: 20180810 Address after: 100089 42 North Street, Xizhimen, Haidian District, Beijing. Co-patentee after: China energy saving (Linyi) environmental protection energy Co., Ltd. Patentee after: China Environment Protection Group Co Ltd Address before: 276000 west section of Dashan Road, Linyi, Linyi, Shandong Patentee before: China energy saving (Linyi) environmental protection energy Co., Ltd. |
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