CN102889101A - Cylinder casting assembly of steam turbine - Google Patents
Cylinder casting assembly of steam turbine Download PDFInfo
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- CN102889101A CN102889101A CN 201210357506 CN201210357506A CN102889101A CN 102889101 A CN102889101 A CN 102889101A CN 201210357506 CN201210357506 CN 201210357506 CN 201210357506 A CN201210357506 A CN 201210357506A CN 102889101 A CN102889101 A CN 102889101A
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- precision casting
- casting
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- outer shell
- steam
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Abstract
The invention provides a cylinder casting assembly of a steam turbine; and the cylinder casting assembly of the steam turbine comprises an outer cylinder precision casting, an inner cylinder precision casting, a double-layer sleeve and steam nozzles, wherein a partition board sleeve is arranged at the left end of the inner wall of the outer cylinder precision casting; the inner cylinder precision casting is arranged on the right side of the partition board sleeve; the double-layer sleeve is arranged on the outer cylinder precision casting; a nozzle chamber steam inlet pipe is sleeved in an inner layer of the double-layer sleeve; a plurality of sensor mounting grooves and steam nozzles are arranged on the inner wall of the outer cylinder precision casting and the outer wall of the inner cylinder precision casting; and temperature sensors are embedded in the sensor mounting grooves. The cylinder casting assembly of the steam turbine, provided by the invention, has extremely high casting precision, high strength, safety, reliability, small heat tress and so on. The temperature sensors arranged in the inner cylinder precision casting can be used for detecting temperatures of the inner wall of the outer cylinder casting and the outer wall of the inner cylinder casting; the steam nozzles can be used for compensating temperatures of the outer cylinder casting and the inner cylinder casting; and the cylinder casting assembly of the steam turbine, provided by the invention, can be used for preferably solving problems of large heat stress and heat deformation of the cylinder wall, cylinder deformation, cracks and the like.
Description
Technical field
The present invention relates to a kind of steam turbine, especially relate to a kind of steam turbine foundry goods assembly.
Background technique
Steam turbine is the rotary prime mover of utilizing steam thermal energy to do work, its principle is that the steam after the boiler heating enters nozzle of steam turbine, increase flow velocity in the expansion step-down of nozzle place, and eject by certain direction, the heat energy of steam is transformed into kinetic energy, enters blade and promote vane rotary, namely the kinetic energy of steam becomes the rotating mechanical energy of rotor, the drawing generator operation, thus generate electricity.The advantages such as steam turbine has that power is large, rotating speed is high, efficient is high, operates steadily, long service life.
The casting cylinder is the shell of steam turbine, its effect is that the flow passage component of steam turbine and atmosphere are separated, form the steam chest of sealing, assurance steam is finished the transfer process of energy in steam turbine inside, in the casting cylinder component such as nozzle box, dividing plate, diaphragm housing ring is installed; The casting cylinder is connecting admission, steam discharge outward, the pipeline such as draw gas.The casting cylinder also plays load-bearing to the static parts of steam turbine part.From fuel-saving angle, the startup of steam turbine, to stop be that The faster the better, but when the load big ups and downs the time, the casting cylinder wall is excessive along the temperature difference of cross-sectional direction, casting cylinder temperature difference along its length is excessive etc., thermal stress and the thermal distortion that can cause casting cylinder are very large, may cause the distortion of cylinder cast body or crackle, cause and cast axial in cylinder gas leakage or the casting cylinder, radial clearance change, the accident that causes dynamic and static leaf collision, in case the generation major accident is very serious to the direct harm that the person and equipment cause.
Summary of the invention
The present invention mainly be solve that casting cylinder wall transverse section, the length direction temperature difference that existing steam turbine causes greatly because of fluctuation of load in using are large, thermal stress and the problems such as thermal distortion is large, casting cylinder deformation or crackle.
The present invention mainly solves the problems of the technologies described above by following technical proposals: a kind of steam turbine foundry goods assembly comprises outer shell precision casting, inner casing precision casting, bilayer sleeve, steam nozzle; The left end of described outer shell precision casting inwall is provided with diaphragm housing ring, and the diaphragm housing ring right side is provided with the inner casing precision casting; The inwall of described diaphragm housing ring, outer shell precision casting is provided with septalium; Be provided with bilayer sleeve on the described outer shell precision casting, the bilayer sleeve skin is connected with the outer shell precision casting by bolt, and the bilayer sleeve internal layer is arranged with nozzle box's steam inlet pipe, is provided with coil between the inside and outside layer of bilayer sleeve; Be provided with a plurality of installation of sensors grooves and steam nozzle on described outer shell precision casting inwall, the inner casing precision casting outer wall, be embedded with temperature transducer in the installation of sensors groove, outer shell precision casting and inner casing precision casting outer wall are provided with stiffening rib.
As preferably, described inner casing precision casting left end is connected with outer shell precision casting inwall by vertical pin, and inner casing precision casting outer wall right-hand member is connected with outer shell precision casting inwall by vertical pin, and described vertical pin and vertical pin all are arranged on to be cast on the cylinder vertical center line.
As preferably, also be provided with labyrinth ring between the inside and outside layer of described bilayer sleeve and the nozzle-type steam inlet pipe.
As preferably, steam inlet pipe bottom in described nozzle box is provided with the nozzle box, is provided with nozzle in the nozzle box.
As preferably, described outer shell precision casting bottom is provided with exhaust steam pipe.
The present invention has the advantages such as casting accuracy is high, intensity is high, safe and reliable, thermal stress is little.The inner temperature transducer that arranges of its inner casing precision casting can detect the temperature of outer shell foundry goods inwall and inner casing foundry goods outer wall in real time, if excessive temperature differentials by steam nozzle internally, the outer shell foundry goods carries out temperature correction, avoid causing thermal stress and thermal distortion excessive because center housing temperature is inhomogeneous; Its vertical pin and vertical pin can guarantee that cylinder can only expand along the cylinder center direction, and cylinder center remains unchanged in the expansion; The stiffening rib that arranges on its outer shell and the inner casing precision casting can not only increase cylinder strength, prevents crackle and distortion, and can allow larger that the cylinder body size does.This steam turbine foundry goods assembly can solve that cylinder wall transverse section, the length direction temperature difference are large, thermal stress and the problems such as thermal distortion is large, cylinder deformation or crackle, thereby has good promotional value.
Description of drawings
Below in conjunction with the drawings and specific embodiments, technological scheme of the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Embodiment
Fig. 1 is structural representation of the present invention.As shown in the figure, this steam turbine foundry goods assembly comprises outer shell precision casting 1, inner casing precision casting 2, bilayer sleeve 3, steam nozzle 9; The left end of described outer shell precision casting 1 inwall is provided with diaphragm housing ring 4, diaphragm housing ring 4 right sides are provided with inner casing precision casting 2, described inner casing precision casting 2 left ends are connected with outer shell precision casting 1 inwall by vertical pin 5, inner casing precision casting 2 outer wall right-hand members are connected with outer shell precision casting 1 inwall by vertical pin 6, and described vertical pin 5 and vertical pin 6 all are arranged on the casting cylinder vertical center line.The inwall of described diaphragm housing ring 4, inner casing precision casting 2 is provided with septalium 7.
Be provided with bilayer sleeve 3 on the described outer shell precision casting 1, bilayer sleeve outer 31 is connected with outer shell precision casting 1, bilayer sleeve internal layer 32 is arranged with nozzle box's steam inlet pipe 33, be provided with labyrinth ring 34 between described steam inlet pipe inner tube 32 and the nozzle box's steam inlet pipe 33, steam inlet pipe 33 bottoms in nozzle box's are provided with nozzle box 35, are provided with nozzle 36 in the nozzle box 35.Be provided with coil 37 between the bilayer sleeve 3 inside and outside layers; Be provided with a plurality of installation of sensors grooves 8 and steam nozzle 9 on described outer shell precision casting 1 inwall, inner casing precision casting 2 outer walls, be embedded with temperature transducer 81 in the installation of sensors groove 8.Outer shell precision casting 1 and inner casing precision casting 2 outer walls are provided with stiffening rib 10.Described outer shell precision casting 1 bottom is provided with exhaust steam pipe 11.
This cylinder assembly adopts double layer construction, every layer of pressure reduction and temperature difference minimizing that the casting cylinder bears, the wall thickness attenuate of casting cylinder, thereby reduced to open, stop and the thermal stress during working conditions change, outer shell precision casting 1 does not contact with high-temperature steam, therefore outer shell precision casting 1 can adopt more rudimentary steel, saves material and cost.Bilayer sleeve 3 and between labyrinth ring 34, allow the relative expansion between nozzle box's steam inlet pipe 33 and the bilayer sleeve 3, the while does not allow high-temperature steam leak yet.The inner temperature transducer 81 that arranges of cylinder assembly can detect the temperature of outer shell precision casting 1 inwall and inner casing precision casting 2 outer walls in real time, if excessive temperature differentials then by in 36 pairs at the steam nozzle, the outer shell precision casting carries out temperature correction, avoid causing because center housing temperature is inhomogeneous the excessive be full of cracks that causes of thermal stress and thermal distortion, vertical pin 5 and vertical pin 6 can guarantee that cylinder can only expand along the cylinder center direction, cylinder center remains unchanged in the expansion, the stiffening rib 10 that arranges on outer shell precision casting 1 and the inner casing precision casting 2 can not only increase cylinder block casting intensity, prevent crackle and distortion, and can make larger that the size of cylinder block casting can do.
Claims (5)
1. a steam turbine foundry goods assembly comprises outer shell precision casting, inner casing precision casting, bilayer sleeve, steam nozzle, it is characterized in that the left end of described outer shell precision casting inwall is provided with diaphragm housing ring, and the diaphragm housing ring right side is provided with the inner casing precision casting; The inwall of described diaphragm housing ring, outer shell precision casting is provided with septalium; Be provided with bilayer sleeve on the described outer shell precision casting, the bilayer sleeve skin is connected with the outer shell precision casting by bolt, and the bilayer sleeve internal layer is arranged with nozzle box's steam inlet pipe, is provided with coil between the inside and outside layer of bilayer sleeve; Be provided with a plurality of installation of sensors grooves and steam nozzle on described outer shell precision casting inwall, the inner casing precision casting outer wall, be embedded with temperature transducer in the installation of sensors groove, outer shell precision casting and inner casing precision casting outer wall are provided with stiffening rib.
2. steam turbine foundry goods assembly according to claim 1, it is characterized in that described inner casing precision casting left end is connected with outer shell precision casting inwall by vertical pin, inner casing precision casting outer wall right-hand member is connected with outer shell precision casting inwall by vertical pin, and described vertical pin and vertical pin all are arranged on the casting cylinder vertical center line.
3. steam turbine foundry goods assembly according to claim 1 and 2 is characterized in that also being provided with labyrinth ring between the inside and outside layer of described bilayer sleeve and the nozzle-type steam inlet pipe.
4. steam turbine foundry goods assembly according to claim 3 is characterized in that steam inlet pipe bottom, described nozzle box is provided with the nozzle box, is provided with nozzle in the nozzle box.
5. steam turbine foundry goods assembly according to claim 1 and 2 is characterized in that described outer shell precision casting bottom is provided with exhaust steam pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210357506 CN102889101A (en) | 2012-09-24 | 2012-09-24 | Cylinder casting assembly of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210357506 CN102889101A (en) | 2012-09-24 | 2012-09-24 | Cylinder casting assembly of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102889101A true CN102889101A (en) | 2013-01-23 |
Family
ID=47532762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210357506 Pending CN102889101A (en) | 2012-09-24 | 2012-09-24 | Cylinder casting assembly of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102889101A (en) |
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2012
- 2012-09-24 CN CN 201210357506 patent/CN102889101A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130123 |