CN206830245U - Extraction condensing type changes the exhaust casing cooling system of back pressure turbine - Google Patents
Extraction condensing type changes the exhaust casing cooling system of back pressure turbine Download PDFInfo
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- CN206830245U CN206830245U CN201720700575.3U CN201720700575U CN206830245U CN 206830245 U CN206830245 U CN 206830245U CN 201720700575 U CN201720700575 U CN 201720700575U CN 206830245 U CN206830245 U CN 206830245U
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Abstract
A kind of extraction condensing type changes the exhaust casing cooling system of back pressure turbine, has exhaust casing, jiggering casing, insulation packing layer, thermal insulation board, blind plate, two marine type fans, two air vents.Above-mentioned insulation packing layer is located in exhaust casing, at the hollow nest in the oil catch of the rear bearing of the rear packing and steam turbine of steam turbine centre；Above-mentioned thermal insulation board is installed in the attachment of jiggering cabinet exterior；The exhaust ports of the bottom of exhaust casing are that the exhaust ports of exhaust casing to condenser are provided with above-mentioned blind plate, and the both sides of blind plate respectively carry an air inlet, and the air outlet of every marine type fan is connected by an air inlet on pipeline blind plate corresponding thereto；Above-mentioned two air vent is respectively provided at the peep hole of exhaust casing, explosion proof door position.The utility model is blown to exhaust casing, good cooling effect, is solved the problems, such as that the exhaust casing temperature of steam turbine is too high, is eliminated potential safety hazard, it is ensured that steam turbine reliability service.
Description
Technical field
A kind of exhaust casing of steam turbine is the utility model is related to, it is especially relevant with the heat sink of the exhaust casing of steam turbine,
Specifically a kind of extraction condensing type changes the exhaust casing cooling system of back pressure turbine.
Background technology
The unit original 1# steam turbines of inventor are 12MW sucking condensing turbine groups, according to production run needs, are transformed
For 6MW back pressure units.Unit operation is normal after transformation, but the temperature of exhaust casing is too high, and the unit operation time is longer, exhaust casing
Temperature is higher, reaches 108 DEG C.The temperature of exhaust casing is too high to cause the danger that 2# bearing bush temperatures are too high and cylinder expansion is exceeded
Evil.With being that the transformation for the purpose of cooling is carried out to it, in transformation process, to reduce the excessive temperature of exhaust casing, remove anti-
Quick-fried door, peep hole, two Fans are mounted with, draft type is exhausting, extracts heat in cylinder out.After steam turbine on-load, when long
Between run, after two Fans are opened, the rise of the exhaust casing constant temperature of steam turbine reaches 120 DEG C, potential safety hazard be present, such a
The reforming mode that cools is infeasible.
Inventor retrieves following Patents documents：CN201778845U discloses a kind of back cylinder for steam turbine, bag
Include on exhaust casing lid, exhaust casing lower cover and rear bearing block lid, on the exhaust casing lid, rear bearing block lid respectively with exhaust casing lower cover
It is detachably connected, reduces labor strength, shortens the production cycle, lid, rear bearing block lid, exhaust casing lower cover on exhaust casing
Welding structure is respectively adopted, there is simple welding, light weight, save the characteristics of material.CN204175715U discloses a kind of gas
Cylinder heat sink, including vortex tube refrigerator, radiator, three-way connection and heating pipe；The vortex tube refrigerator is provided with pressure
Contracting air intake, cold air outlet and heat outlet, the cold air outlet of the vortex tube refrigerator and the first of the three-way connection
Input connects；The heat outlet of the vortex tube refrigerator is connected by the second input of heating pipe and the three-way connection
It is logical, it is in series with radiator on the heating pipe；The output end of the three-way connection connects with the inlet end of the cylinder.
The above technology accomplishes that energy is obvious for how to make extraction condensing type change the exhaust casing cooling system of back pressure turbine
Reduction exhaust casing temperature, so that it is guaranteed that steam turbine reliability service, does not provide specific guidance program.
The content of the invention
The purpose of this utility model is to provide the exhaust casing cooling system that a kind of extraction condensing type changes back pressure turbine, with solution
The problem of certainly the exhaust casing temperature of steam turbine is too high, so as to eliminate safe hidden trouble, it is ensured that steam turbine reliability service.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows：
A kind of extraction condensing type changes the exhaust casing cooling system of back pressure turbine（Extraction condensing type changes back pressure turbine in other words
Exhaust casing heat sink）, there is exhaust casing, jiggering casing, its technical scheme is that described extraction condensing type changes back pressure type steam turbine
The exhaust casing cooling system of machine also has insulation packing layer（Adiabator layer）, thermal insulation board, blind plate, two marine type fans, two
Air vent, above-mentioned insulation packing layer is located in exhaust casing, the rear bearing of the rear packing and steam turbine of steam turbine（That is 2# bearing shells）'s
Among oil catch at hollow nest；Above-mentioned thermal insulation board is installed in the outer wall attachment of jiggering casing；The exhaust ports of the bottom of exhaust casing are
The exhaust ports of exhaust casing to condenser are provided with above-mentioned blind plate, and the both sides of blind plate respectively carry an air inlet, every wind peculiar to vessel
The air outlet of machine is connected by an air inlet on pipeline blind plate corresponding thereto；Above-mentioned two air vent is respectively provided at
The peep hole of exhaust casing, explosion proof door position（The peep hole of exhaust casing, explosion proof door are opened）.Above-mentioned marine type fan is to exhaust casing
Carry out forced ventilation heat exchange（Air-supply）, to reduce the temperature of exhaust casing.The utility model is blown to exhaust casing.In operation only
A marine type fan, which need to be opened, just can play a part of reducing exhaust casing temperature, and a conduct is standby in addition.
In above-mentioned technical proposal, described thermal insulation board is preferably set along the outer wall surrounding of jiggering casing, and thermal insulation board is along jiggering
The length direction stretching, extension of casing（Stretched along the direction of the handwheel center line on jiggering casing）, length and the jiggering case of thermal insulation board
The length of body is preferably suitable（It is equal）.Above-mentioned insulation packing layer is preferably alumina silicate Nomex.Above-mentioned thermal insulation board is preferably by two pieces
Stainless-steel sheet and the resistant to elevated temperatures asbestos board being clipped among this two pieces of stainless-steel sheets are formed.
Extraction condensing type described in the utility model change the exhaust casing cooling system of back pressure turbine also have insulation packing layer,
Thermal insulation board, blind plate, two marine type fans, two air vents, above-mentioned insulation packing layer is located in exhaust casing, the rear packing of steam turbine
With the rear bearing of steam turbine（That is 2# bearing shells）Oil catch among at hollow nest；It is provided with the outer wall attachment of jiggering casing above-mentioned heat-insulated
Plate；The exhaust ports of the bottom of exhaust casing are that the exhaust ports of exhaust casing to condenser are provided with above-mentioned blind plate, the both sides of blind plate
Respectively carry an air inlet, the air outlet of every marine type fan passes through an air inlet phase on pipeline blind plate corresponding thereto
Connection；Above-mentioned two air vent is respectively provided at the peep hole of exhaust casing, explosion proof door position.So, marine type fan enters to exhaust casing
Row forced ventilation exchanges heat（Air-supply）, to reduce the temperature of exhaust casing.The utility model is blown to exhaust casing.Only needed in operation
Opening a marine type fan just can play a part of reducing exhaust casing temperature, and a conduct is standby in addition.Through experiment, using this practicality
New cooling system is practical, and manufacturing cost is low, and unit operation is for a long time（4 ~ 6 hours）Afterwards, the temperature of exhaust casing is 85
DEG C, the temperature of exhaust casing reduces more than 20%, good cooling effect, so as to eliminate potential safety hazard, it is ensured that steam turbine is reliably transported
OK, the fault rate of steam turbine reduces more than 25%, and the service life of steam turbine greatly prolongs.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 be Fig. 1 in A to（It is local）View.
Embodiment
As shown in Figure 1 and Figure 2, the exhaust casing cooling system that extraction condensing type of the present utility model changes back pressure turbine has tool
There are 6, two exhaust casing 1, jiggering casing 4, insulation packing layer 10, thermal insulation board 3, blind plate marine type fans（Two centrifugal fans）8
With 8 ', two air vents 2 and 2 '.Above-mentioned insulation packing layer 10 is located in exhaust casing, after the rear packing 9 and steam turbine of steam turbine
Bearing（That is 2# bearing shells）Among 5 oil catch at hollow nest.Above-mentioned thermal insulation board 3 is installed in the outer wall attachment of jiggering casing 4.Exhaust casing
The exhaust ports of 1 bottom are that the exhaust ports of exhaust casing to condenser are provided with above-mentioned blind plate 6, and the both sides of blind plate 6 respectively carry
One air inlet 7,7 ', the air outlet of every marine type fan 8,8 ' pass through an air inlet on pipeline blind plate corresponding thereto
7th, 7 ' are connected.Above-mentioned two air vent 2,2 ' is respectively provided at the peep hole of exhaust casing, explosion proof door position（I.e. by the sight of exhaust casing
Examine hole, explosion proof door is opened）.Above-mentioned marine type fan carries out forced ventilation heat exchange to exhaust casing（Air-supply）, to reduce the temperature of exhaust casing
Degree.The utility model is blown to exhaust casing.A marine type fan need to be only opened in operation just can play reduction exhaust casing temperature
Effect, a conduct is standby in addition.
As shown in Figure 1 and Figure 2, outer wall surrounding of the above-mentioned thermal insulation board 3 along jiggering casing 4 is set, and thermal insulation board 3 is along jiggering casing 4
Length direction stretching, extension（Stretched along the direction of the handwheel center line on jiggering casing）, length and the jiggering casing 4 of thermal insulation board 3
Length it is suitable（It is equal）.Above-mentioned insulation packing layer 10 is alumina silicate Nomex.Above-mentioned thermal insulation board 3 by two pieces of stainless-steel sheets with
And the resistant to elevated temperatures asbestos board being clipped among this two pieces of stainless-steel sheets is formed.
Through experiment, using cooling system of the present utility model（That is above-described embodiment）Practical, manufacturing cost is low, unit
Operation is for a long time（4 ~ 6 hours）Afterwards, the temperature of exhaust casing is 85 DEG C, and the temperature of exhaust casing reduces more than 20%, cooling-down effect
It is good, so as to eliminate potential safety hazard, it is ensured that steam turbine reliability service, the fault rate of steam turbine reduce more than 25%, steam turbine
Service life greatly prolong.
Claims (4)
1. a kind of extraction condensing type changes the exhaust casing cooling system of back pressure turbine, there is exhaust casing（1）, jiggering casing（4）, it is special
Sign is that the exhaust casing cooling system that described extraction condensing type changes back pressure turbine also has insulation packing layer（10）, thermal insulation board
（3）, blind plate（6）, two centrifugal fans（8、8′）, two air vents（2、2′）, above-mentioned insulation packing layer（10）Positioned at rear vapour
Cylinder is interior, the rear packing of steam turbine（9）With the rear bearing of steam turbine（5）Oil catch among at hollow nest；In jiggering casing（4）Outer wall
Attachment is provided with above-mentioned thermal insulation board（3）；Exhaust casing（1）The exhaust ports of bottom to be exhaust casing pacify to the exhaust ports of condenser
Equipped with above-mentioned blind plate（6）, blind plate（6）Both sides respectively carry an air inlet（7、7′）, every centrifugal fan（8、8′）Give
Air port passes through an air inlet on pipeline blind plate corresponding thereto（7、7′）It is connected；Above-mentioned two air vent（2、2′）Point
Peep hole, the explosion proof door position of exhaust casing are not located at.
2. extraction condensing type according to claim 1 changes the exhaust casing cooling system of back pressure turbine, it is characterised in that above-mentioned
Thermal insulation board（3）Along jiggering casing（4）Outer wall surrounding set, thermal insulation board（3）Along jiggering casing（4）Length direction stretching, extension, i.e.,
Thermal insulation board（3）Stretched along the direction of the handwheel center line on jiggering casing, thermal insulation board（3）Length and jiggering casing（4）Length
Spend equal.
3. extraction condensing type according to claim 1 changes the exhaust casing cooling system of back pressure turbine, it is characterised in that above-mentioned
It is incubated packing layer（10）For alumina silicate Nomex.
4. extraction condensing type according to claim 1 changes the exhaust casing cooling system of back pressure turbine, it is characterised in that above-mentioned
Thermal insulation board（3）It is made up of two pieces of stainless-steel sheets and the resistant to elevated temperatures asbestos board being clipped among this two pieces of stainless-steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720700575.3U CN206830245U (en) | 2017-06-16 | 2017-06-16 | Extraction condensing type changes the exhaust casing cooling system of back pressure turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720700575.3U CN206830245U (en) | 2017-06-16 | 2017-06-16 | Extraction condensing type changes the exhaust casing cooling system of back pressure turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206830245U true CN206830245U (en) | 2018-01-02 |
Family
ID=60775884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720700575.3U Active CN206830245U (en) | 2017-06-16 | 2017-06-16 | Extraction condensing type changes the exhaust casing cooling system of back pressure turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206830245U (en) |
-
2017
- 2017-06-16 CN CN201720700575.3U patent/CN206830245U/en active Active
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