CN211474192U - Steam turbine regulating stage nozzle structure - Google Patents
Steam turbine regulating stage nozzle structure Download PDFInfo
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- CN211474192U CN211474192U CN201922335832.XU CN201922335832U CN211474192U CN 211474192 U CN211474192 U CN 211474192U CN 201922335832 U CN201922335832 U CN 201922335832U CN 211474192 U CN211474192 U CN 211474192U
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Abstract
The utility model relates to a technical field of steam turbine, more specifically say, it relates to a steam turbine regulation level nozzle structure, including the steam turbine, be equipped with the nozzle on the inlet end on the steam turbine, the quantity of nozzle is 8, and the interval between two adjacent nozzles is 5cm, and the opening terminal surface of nozzle is the inclined plane form for the steam turbine axis, has the reposition of redundant personnel structure in the nozzle, the reposition of redundant personnel structure includes a casing that has a plurality of ventilation holes, the utility model discloses rational in infrastructure simple, the practicality is strong, improves steam turbine generating efficiency.
Description
Technical Field
The utility model relates to a technical field of steam turbine, more specifically say, it relates to a steam turbine regulation level nozzle structure.
Background
With the vigorous development of heat supply in the domestic area, the amount of externally supplied heat steam is larger and larger. The extracted steam passes through the water spray for temperature reduction due to high temperature and then supplies heat to the outside, and a large amount of high-temperature steam is extracted from the steam turbine, so that the power generation efficiency of the steam turbine is reduced.
In order to reduce the temperature of the extracted steam, the temperature of the steam after 10 stages needs to be reduced, the enthalpy drop of the front 10 stages of the steam turbine needs to be increased, and the 1 st stage, namely the double-row speed stage of the steam turbine is most convenient to increase the enthalpy drop. Increasing the enthalpy drop of the two-row velocity stage makes it possible to increase the steam flow velocity entering this stage.
The steam flow speed is increased, the flow area of the nozzle can be reduced, and the pressure gradient of steam entering the nozzle is increased under the same flow. Under the condition that the main steam pressure is not changed, the reasonable nozzle flow area can ensure that the steam entering the double-row speed stage obtains the maximum enthalpy drop. The same pressure, the lower the enthalpy, the lower the corresponding temperature.
The existing turbine air inlet nozzle is provided with 12 ports, so that the flow area is large, and the existing turbine air inlet nozzle is one of important reasons for low power generation efficiency of the turbine.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a rational in infrastructure simple, the practicality is strong, improves steam turbine generating efficiency's steam turbine regulation level nozzle structure.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a steam turbine regulation level nozzle structure, includes the steam turbine, is equipped with the nozzle on the inlet end on the steam turbine, and the quantity of nozzle is 8, and the interval between two adjacent nozzles is 5cm, and the opening terminal surface of nozzle is the inclined plane form for the steam turbine axis, has the reposition of redundant personnel structure in the nozzle, the reposition of redundant personnel structure includes a casing that has a plurality of ventilation holes.
The utility model discloses further set up to: the ventilation hole has 3 among the casing, and the ventilation hole inner wall equipartition has the guiding gutter.
The utility model discloses further set up to: the outer wall of the shell is provided with a clamping strip, and the inner wall of the nozzle is provided with a clamping groove matched with the clamping strip of the shell.
Contrast prior art not enough, the beneficial effects of the utility model are that:
the flow area of 12 openings of the nozzle is changed into the flow area of 8 openings, so that the flow area of steam is reduced, the steam flow speed entering the double-row speed level is increased, the enthalpy drop of the steam at the double-row speed level is increased, the subsequent steam temperature is reduced, and the purpose of reducing the subsequent steam extraction temperature is achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the flow dividing structure of the present invention.
Detailed Description
Embodiments of the present invention are further described with reference to fig. 1 to 2.
The embodiment has the specific structure that: the device comprises a steam turbine 1, wherein nozzles 2 are arranged at the air inlet end of the steam turbine 1, the number of the nozzles 2 is 8, and the distance between every two adjacent nozzles 2 is 5 cm.
After the research and development project is completed, the pressure behind the regulating valve of the unit is increased to 8MPa from the original 5MPa when the steam inlet amount is 220T, and the temperature after the regulating stage is reduced to 460 ℃ from the original 480 ℃. The level power of the regulating level is increased, and the generating efficiency of the unit is improved. Under the condition of the same power generation, the steam inlet amount of the unit is reduced by 10T/H, the coal consumption of the boiler is reduced by about 1T/H, and the benefit is 408 ten thousand yuan/year.
The opening end face 2a of the nozzle 2 is inclined relative to the axis of the steam turbine, and air inlet is facilitated.
To further reduce the flow area, a flow dividing structure is detachably arranged in the nozzle 2. In order to further reduce the circulation area and ensure the circulation efficiency, the structure of the flow dividing structure is set as a shell 3 with three ventilation holes 30, the inner walls of the ventilation holes are dug with flow guide grooves, and the groove walls of the flow guide grooves 301 are arc-shaped.
The outer wall of the shell 3 is provided with a clamping strip 31, and the inner wall of the nozzle 2 is provided with a clamping groove matched with the clamping strip of the shell. The shunting structure is arranged on the nozzle 2 through the matching of the clamping groove and the clamping strip.
The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and the skilled in the art can carry out the common changes and replacements within the technical solution of the present invention.
Claims (3)
1. The utility model provides a steam turbine regulation stage nozzle structure, includes the steam turbine, is equipped with the nozzle on the inlet end on the steam turbine, characterized by: the number of the nozzles is 8, the distance between every two adjacent nozzles is 5cm, the opening end faces of the nozzles are inclined relative to the axis of the steam turbine, a flow dividing structure is arranged in each nozzle, and each flow dividing structure comprises a shell with a plurality of ventilation holes.
2. The turbine conditioning stage nozzle arrangement of claim 1, wherein: the ventilation hole has 3 among the casing, and the ventilation hole inner wall equipartition has the guiding gutter.
3. The turbine conditioning stage nozzle arrangement of claim 1, wherein: the outer wall of the shell is provided with a clamping strip, and the inner wall of the nozzle is provided with a clamping groove matched with the clamping strip of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335832.XU CN211474192U (en) | 2019-12-23 | 2019-12-23 | Steam turbine regulating stage nozzle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335832.XU CN211474192U (en) | 2019-12-23 | 2019-12-23 | Steam turbine regulating stage nozzle structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211474192U true CN211474192U (en) | 2020-09-11 |
Family
ID=72371752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922335832.XU Active CN211474192U (en) | 2019-12-23 | 2019-12-23 | Steam turbine regulating stage nozzle structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211474192U (en) |
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2019
- 2019-12-23 CN CN201922335832.XU patent/CN211474192U/en active Active
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