CN206816308U - A kind of turbine high-pressure main inlet throttle-stop valve - Google Patents
A kind of turbine high-pressure main inlet throttle-stop valve Download PDFInfo
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- CN206816308U CN206816308U CN201720404034.6U CN201720404034U CN206816308U CN 206816308 U CN206816308 U CN 206816308U CN 201720404034 U CN201720404034 U CN 201720404034U CN 206816308 U CN206816308 U CN 206816308U
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- bushing
- inlet throttle
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Abstract
A kind of turbine high-pressure main inlet throttle-stop valve, including main valve dish, main valve stem is provided with main valve dish, the front end of main valve stem is provided with main valve bushing, sintered metal powder bearing set is provided with main valve bushing, one end of sintered metal powder bearing set is embedded in main valve bushing, and the other end of sintered metal powder bearing set is provided with rigid anchor.The utility model is by using characteristic of the sintered metal powder bearing set with cellular structure, self-lubricating can be carried out, increase and the lubricity of main valve stem contact surface, it is easy to aoxidize the discharge of debris, avoid main valve stem bite from causing main valve rod bending, install the bending moment that bracket can reduce spring guide and act on main valve stem, the gravity of balancing spring guide rod additional in the stroke outer end of spring guide, reduce the flecition to main valve stem, also effectively reduce main valve stem because creep bending caused by high temperature deforms.
Description
Technical field
A kind of Protection System of Turbin is the utility model is related to, more particularly to a kind of turbine high-pressure main inlet throttle-stop valve.
Background technology
High-pressure main throttle valve is the main portion set of Protection System of Turbin, and structure is controlled quick similar to stop valve with pressure oil
Close and open, the shut-in time is less than 0.8 second, is swift in motion, Steam Turbine can be made to be stopped within the defined time, steam turbine
All stoppage protections are realized by the closing of main inlet throttle-stop valve and timing steam gate, if timing steam gate is refused to close or fitted badly
It is close, it is final by main inlet throttle-stop valve fast shut-off steam turbine vapour source is closed, to prevent Steam Turbine Over-speed Accident, ensure the safe operation of unit.
In operation, because main inlet throttle-stop valve component is all in high temperature and high pressure environment, steam can carry impurity and oxidation to unit
Thing enters in the gap between main valve stem and main valve bushing, causes component to aoxidize, and produces oxide skin and blocks gap, makes main valve stem
The even stuck situation of bite is produced in motion process, causes main valve stem to produce flexural deformation, because the deformation of main valve stem causes
Main inlet throttle-stop valve closes slow, even stuck etc. failure of bite.
Utility model content
The purpose of this utility model is to provide a kind of turbine high-pressure main inlet throttle-stop valve, avoids main valve stem from producing flexural deformation,
Make main inlet throttle-stop valve can be with quick closedown.
Above-mentioned purpose of the present utility model technical scheme is that：A kind of main vapour of turbine high-pressure
Door, including main valve dish are provided with main valve stem in main valve dish, and the front end of main valve stem is provided with main valve bushing, in main valve bushing
Sintered metal powder bearing set is provided with, one end of sintered metal powder bearing set is embedded in main valve bushing, and sintered metal powder bearing set
The other end be provided with rigid anchor.
By using above-mentioned technical proposal, main valve bushing can play guide effect, and sintered metal powder bearing to main valve stem
Set has cellular structure, after being infiltrated in deep fat, be full of lubricating oil between hole, during work due between main valve stem friction send out
Heat, make metal and oily expanded by heating, oil is extruded hole, and then friction surface plays lubrication, after cooling, oil is sucked back into hole again
In gap, can effectively self-lubricating, the oxide skin in gap can be lubricated, be easy to the discharge of oxide skin, avoid because obstruction lead
Stem movement, main valve stem is occured bending and deformation, cause main inlet throttle-stop valve to be closed slow.
Preferably, the side of main valve bushing is provided with the pin one for powder compaction metallurgy bearing holder (housing, cover), powder metallurgy
The bearing holder (housing, cover) other end is welded with rigid anchor, and the pin two for fixing rigid anchor is provided with main valve bushing.
By using above-mentioned technical proposal, by sintered metal powder bearing set by the way of embedded and both ends are using pin fixation
In main valve bushing, ensure sintered metal powder bearing be enclosed in main valve stem motion process will not because friction produce position it is inclined
Move.
Preferably, multiple oilholes for being used to lubricate powder metallurgy bearing holder (housing, cover) are provided with main valve bushing.
By using above-mentioned technical proposal, by adding lubricating oil in oilhole, sintered metal powder bearing can be directly lubricated
Set, ensure the lubricity with main valve stem contact surface.
Preferably, the leading section of main valve stem is provided with spring guide, and spring guide directly contacts with main valve bushing, spring
The stroke outer end of guide rod is provided with bracket.
By using above-mentioned technical proposal, spring guide end directly contacts with main valve bushing, is closing main inlet throttle-stop valve
When door rod leakage vapour be reduced to minimum, bracket is played a supporting role to main valve stem, it is possible to reduce spring guide is acted on main valve stem
Bending moment, the gravity of balancing spring guide rod reduces the flecition to main valve stem, also effectively prevent main valve stem because of high temperature
Caused creep bending deformation.
Preferably, valve rod connecting pin is provided between main valve stem and spring guide, end and the spring guide of main valve stem connect
Synapsis is provided with pad.
By using above-mentioned technical proposal, it is added gasket in main valve boom end, it is ensured that main valve boom end contacts with spring guide,
Spring guide and main valve stem connecting pin active force are reduced, prevents from cutting main valve stem connecting pin in operation and causing accident.
Preferably, main valve stem is provided with the resistance vapour circle of packing dentation with main valve dish contact position, and bushing is provided with main valve dish.
By using above-mentioned technical proposal, resistance vapour circle can effectively avoid main valve stem gas leakage, ensure the sealing of main valve stem
Property, avoid high-temperature steam from spilling other assemblies, component is caused damage.
Preferably, hinder to be provided with above vapour circle and lead steam chest one and lead steam chest two.
By using above-mentioned technical proposal, it is that the high steam that will be spilt receives oxygen-eliminating device, hyperbaric heating to lead steam chest one
Reclaimed in the devices such as device, lead steam chest and be second placed on close to atmospheric side to absorb the leakage vapour of low pressure, and be sent into gland heater
Deng being reclaimed in device.
Preferably, the rearward end of main valve stem is provided with spring base, and the front end of spring base is provided with equalizing valve spring, spring base
Rear end be provided with equalizing valve.
By using above-mentioned technical proposal, equalizing valve spring is easy to start equalizing valve, and equalizing valve can start main inlet throttle-stop valve, main
Porthole needs larger power on startup, directly initiates relatively difficult, can more rapidly start main vapour by using equalizing valve
Door.
In summary, the utility model has the advantages that：
The utility model has the characteristic of cellular structure by using sintered metal powder bearing set, can carry out self-lubricating,
Increase and the lubricity of main valve stem contact surface, it is easy to aoxidize the discharge of debris, avoids main valve stem bite from causing main valve rod bending,
The stroke outer end of spring guide, which installs bracket additional, can reduce the bending moment that spring guide is acted on main valve stem, and balancing spring is led
The gravity of bar, reduces the flecition to main valve stem, also effectively reduces main valve stem because creep bending caused by high temperature deforms.
Brief description of the drawings
Fig. 1 is sectional view of the present utility model；
Fig. 2 is the enlarged drawing at A in Fig. 1；
Fig. 3 is the enlarged drawing at B in Fig. 1.
Reference：1st, valve seat；2nd, main valve dish；3rd, steam chest one is led；4th, steam chest two is led；5th, vapour circle is hindered；6th, oilhole；7th, open in advance
Valve；8th, spring base；9th, equalizing valve spring；10th, bushing；11st, main valve bushing；12nd, sintered metal powder bearing set；13rd, pin one；
14th, rigid anchor；15th, pin two；16th, valve rod connecting pin；17th, bracket；18th, spring guide；19th, main valve stem；20th, pad.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
A kind of turbine high-pressure main inlet throttle-stop valve, as shown in figure 1, being mainly made up of valve seat 1, main valve dish 2 and main valve stem 19, main valve
Bar 19 is arranged in main valve dish 2, and the bushing 10 on main valve dish 2 plays pad effect, and main valve stem 19 and main valve dish to main valve dish 2
2 contact surface avoids the gas leakage of main valve stem 19 by installing the resistance vapour circle 5 of packing dentation additional, and the top of resistance vapour circle 5, which is provided with, to be used to dredge
Lead and leak into leading for high-temperature steam and steam chest 1 and lead steam chest 24, deoxygenation can be received by the high steam spilt by leading steam chest 1
Reclaimed in the devices such as device, high-pressure heater, lead steam chest 24 and be placed on close to atmospheric side to absorb the leakage vapour of low pressure, and send
Enter and reclaimed in the devices such as gland heater, main valve stem 19 is enclosed in main valve bushing 11, and main valve stem 19 can be in main valve post gasket
Being slided in set 11, main valve bushing 11 is fixedly connected with bushing 10, and main valve bushing 11 directly contacts with the end of spring guide 18,
Making main inlet throttle-stop valve, main valve stem 19 leaks vapour and is reduced to minimum when closed, passes through valve rod connecting pin between spring guide 18 and main valve stem 19
16 connections, and the pad 20 of the end of main valve stem 19 and the contact position of spring guide 18, reduce spring guide 18 and valve rod connecting pin
16 active forces, prevent from cutting valve rod connecting pin 16 in operation and causing accident；The rear end of main valve stem 19 is connected with spring base 8, spring
8 one end of seat are connected with the equalizing valve spring 9 for starting equalizing valve 7, and the other end connects with the equalizing valve 7 for starting main inlet throttle-stop valve
Touch.
As shown in Fig. 2 main valve bushing 11 is embedded with sintered metal powder bearing set 12, the oilhole 6 opened on main valve bushing 11
Lubricating oil can directly be added to be lubricated sintered metal powder bearing set 12, sintered metal powder bearing set 12 is because of its loose structure, oilhole 6
Interior lubricating oil can penetrate into the contact surface of sintered metal powder bearing set 12 and main valve stem 19, and can store lubricating oil, real
Existing self-lubricating, the lubricity between increase and main valve stem 19, the pin 1 that sintered metal powder bearing covers 12 one end pass through main valve stem
The powder compaction metallurgy bearing holder (housing, cover) 12 of bushing 11, the other end welds with rigid anchor 14, and rigid anchor 14 is by being arranged on master
The pin 2 15 of the top of valve lever bushing 11 is fixed, and makes the installation of sintered metal powder bearing set 12 more firm.
As shown in figure 3, being provided with bracket 17 in the stroke outer end of spring guide 18, bracket 17 can reduce spring guide 18
The bending moment acted on main valve stem 19, the gravity of balancing spring guide rod 18, reduce the flecition to main valve stem 19, also have
Effect avoids main valve stem 19 because creep bending caused by high temperature deforms.
It is below the elaboration to the utility model application method：Install sintered metal powder bearing set additional in main valve bushing 11
12, because of the loose structure of sintered metal powder bearing set 12, can oil admittedly, due to frictional heating between main valve stem 19 during work, make
Metal and oily expanded by heating, oil is extruded hole, and then friction surface plays lubrication, after cooling, oil is sucked back into hole again,
Can effectively self-lubricating, the oxide skin in gap can be lubricated, be easy to the discharge of oxide skin, avoid because block main valve stem 19
Motion, makes main valve stem 19 occur bending and deformation, and causes main inlet throttle-stop valve to be closed slow；The bracket 17 of the stroke outer end of spring guide 18 is used for
The bending moment that spring guide 18 is acted on main valve stem 19 is reduced, avoids main valve stem 19 from occuring bending and deformation.
This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model
Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but
As long as all protected in right of the present utility model by Patent Law.
Claims (8)
1. a kind of turbine high-pressure main inlet throttle-stop valve, including main valve dish（2）, main valve dish（2）Inside it is provided with main valve stem（19）, its feature exists
In：The main valve stem（19）Front end be provided with main valve bushing（11）, the main valve bushing（11）Inside it is provided with powder smelting
Golden bearing holder (housing, cover)（12）, the sintered metal powder bearing set（12）One end be embedded in main valve bushing（11）It is interior, and powder metallurgy axle
Bearing sleeve（12）The other end be provided with rigid anchor（14）.
A kind of 2. turbine high-pressure main inlet throttle-stop valve according to claim 1, it is characterised in that：The main valve bushing（11）'s
Side is provided with for powder compaction metallurgy bearing holder (housing, cover)（12）Pin one（13）, the sintered metal powder bearing set（12）The other end
With rigid anchor（14）Welding, and main valve bushing（11）On be provided with for fixing rigid anchor（14）Pin two
（15）.
A kind of 3. turbine high-pressure main inlet throttle-stop valve according to claim 1, it is characterised in that：The main valve bushing（11）On
It is provided with multiple for lubricating powder metallurgy bearing holder (housing, cover)（12）Oilhole（6）.
A kind of 4. turbine high-pressure main inlet throttle-stop valve according to claim 1, it is characterised in that：The main valve stem（19）Front end
Portion is provided with spring guide（18）, spring guide（18）With main valve bushing（11）Directly contact, spring guide（18）Stroke
Outer end is provided with bracket（17）.
A kind of 5. turbine high-pressure main inlet throttle-stop valve according to claim 4, it is characterised in that：The main valve stem（19）With spring
Guide rod（18）Between be provided with valve rod connecting pin（16）, the main valve stem（19）End and spring guide（18）Contact position is set
There is pad（20）.
A kind of 6. turbine high-pressure main inlet throttle-stop valve according to claim 1, it is characterised in that：The main valve stem（19）With main valve
Dish（2）Contact position is provided with the resistance vapour circle of packing dentation（5）, the main valve dish（2）On be provided with bushing（10）.
A kind of 7. turbine high-pressure main inlet throttle-stop valve according to claim 6, it is characterised in that：The resistance vapour circle（5）Top is set
It is equipped with and leads steam chest one（3）With lead steam chest two（4）.
A kind of 8. turbine high-pressure main inlet throttle-stop valve according to claim 1, it is characterised in that：The main valve stem（19）Rear end
Portion is provided with spring base（8）, spring base（8）Front end be provided with equalizing valve spring（9）, the spring base（8）Rear end set
There is equalizing valve（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720404034.6U CN206816308U (en) | 2017-04-17 | 2017-04-17 | A kind of turbine high-pressure main inlet throttle-stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720404034.6U CN206816308U (en) | 2017-04-17 | 2017-04-17 | A kind of turbine high-pressure main inlet throttle-stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206816308U true CN206816308U (en) | 2017-12-29 |
Family
ID=60752767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720404034.6U Active CN206816308U (en) | 2017-04-17 | 2017-04-17 | A kind of turbine high-pressure main inlet throttle-stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206816308U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483217A (en) * | 2022-01-10 | 2022-05-13 | 无锡蓝天燃机热电有限公司 | Automatic main valve rod disassembly and maintenance method for steam turbine with pre-opening valve |
| JP7458168B2 (en) | 2019-11-14 | 2024-03-29 | 三菱重工業株式会社 | Steam valve, steam turbine equipment, and steam valve assembly method |
-
2017
- 2017-04-17 CN CN201720404034.6U patent/CN206816308U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7458168B2 (en) | 2019-11-14 | 2024-03-29 | 三菱重工業株式会社 | Steam valve, steam turbine equipment, and steam valve assembly method |
| CN114483217A (en) * | 2022-01-10 | 2022-05-13 | 无锡蓝天燃机热电有限公司 | Automatic main valve rod disassembly and maintenance method for steam turbine with pre-opening valve |
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