CN211648262U - Exhaust steam cylinder for high-rotating-speed ultrahigh-pressure steam turbine - Google Patents
Exhaust steam cylinder for high-rotating-speed ultrahigh-pressure steam turbine Download PDFInfo
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- CN211648262U CN211648262U CN202020144674.XU CN202020144674U CN211648262U CN 211648262 U CN211648262 U CN 211648262U CN 202020144674 U CN202020144674 U CN 202020144674U CN 211648262 U CN211648262 U CN 211648262U
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Abstract
A steam exhaust cylinder for a high-rotating-speed ultrahigh-pressure steam turbine relates to a steam exhaust cylinder for a steam turbine. The utility model discloses a solve the small-size steam turbine of current high rotational speed because the bearing span is short, the progression is many, still need to guarantee the technical problem in steam extraction space. The utility model discloses well rear portion bearing box lower part is some of steam exhauster, and rear portion bearing box lower part is lifted the board and is lifted the board welding structure as an organic whole with the steam exhauster, and rear portion bearing box upper cover is tight with bolt for the lower part of rear portion bearing box, and steam exhauster and rear bearing box become an organic whole, wholly fall on the steam turbine bed frame. The exhaust steam cylinder of the utility model is a uniflow, steam flows into the exhaust steam cylinder through the through-flow steam exhaust outlet 1-1, flows along the steam exhaust flow guide and finally flows into the condenser, and the bearing box and the exhaust steam cylinder are integrated; the utility model discloses a steam exhaust cylinder simple structure is compact, has good rigidity, and pneumatic performance is good, and the bearing span is short, and high rotational speed lower shafting stability is good, is favorable to improving the thermal efficiency of whole unit and guarantees unit safety.
Description
Technical Field
The utility model relates to a steam exhaust cylinder for steam turbine.
Background
The existing small-sized steam turbine set generally has subcritical normal rotating speed, an exhaust cylinder is relatively simple in independent design, but a high-temperature high-rotating-speed small-sized steam turbine needs to ensure an exhaust space due to short bearing span and multiple stages. It is required that the design of the exhaust cylinder and the bearing housing be an integral structure.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve current high rotational speed small-size steam turbine because the bearing span is short, the progression is many, still need guarantee the technical problem in steam extraction space, and provide a high rotational speed exhaust casing for superhigh pressure steam turbine.
The utility model discloses a steam exhaust cylinder for a high-speed ultrahigh-pressure steam turbine, which comprises a steam exhaust cylinder body upper part 1, a blade top steam exhaust guide plate 1-2, a blade root steam exhaust guide plate 1-3, a lower semi-guide plate 1-4, a mist steam exhaust water spray head 1-6, a rear bearing box lower part 1-7, a rear bearing box lower part lifting plate 1-8, a steam exhaust cylinder lifting plate 1-9, an annular steam exhaust water spray pipe 1-10, a first rib plate 1-11, a second rib plate 1-12, a rear bearing box upper cover 2, a first bolt 3 and a steam exhaust cylinder body lower part 4;
the upper cylinder block part 1 and the lower cylinder block part 4 are fixed together through a plurality of second bolts; a through-flow steam exhaust outlet 1-1 is arranged on the side wall of the same side of the upper part 1 of the steam exhaust cylinder body and the lower part 4 of the steam exhaust cylinder body, a blade top steam exhaust guide plate 1-2 is fixed on the inner wall of the same side of the upper part 1 of the steam exhaust cylinder body and the lower part 4 of the steam exhaust cylinder body, the inlet of the blade top steam exhaust guide plate 1-2 is communicated with the through-flow steam exhaust outlet 1-1, a blade root steam exhaust guide plate 1-3 is fixed on the inner wall opposite to the through-flow steam exhaust outlet 1-1, the blade root steam exhaust guide plate 1-3 and the blade top steam exhaust guide plate 1-2 are both in a horn-shaped structure, and the blade root steam exhaust guide plate 1-3 and the blade top steam exhaust; the outer wall of the exhaust steam guide plate 1-2 at the top of the blade is provided with an annular exhaust steam spray pipe 1-10, a plurality of mist exhaust steam spray nozzles 1-6 are uniformly arranged on the annular exhaust steam spray pipe 1-10, and the annular exhaust steam spray pipe 1-10 is communicated with a water inlet pipe 1-10-1;
the lower part 1-7 of the rear bearing box is embedded and fixed on the outer wall of the lower part 4 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1, the upper cover 2 of the rear bearing box is embedded and fixed on the outer wall of the upper part 1 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1, the lower part 1-7 of the rear bearing box is right below the upper cover 2 of the rear bearing box, and the lower part 1-7 of the rear bearing box and the upper cover 2 of the rear bearing box are fixed through a plurality of first bolts 3; the lower lifting plate 1-8 of the rear bearing box is fixed with the lifting plate 1-9 of the exhaust cylinder; a second ribbed plate 1-12 is arranged between the bottom of the lower part 1-7 of the rear bearing box and the steam exhaust guide plate 1-3 of the blade root;
a plurality of lower semi-conductive flow guiding plates 1-4 are symmetrically arranged on two sides of the middle lower part of the steam exhaust flow guiding plate 1-3 at the blade root, the two lower semi-conductive flow guiding plates 1-4 at the lowest part are respectively fixed with one ends of two first ribbed plates 1-11, and the other ends of the two first ribbed plates 1-11 are fixed on the inner wall of the middle lower part of the steam exhaust flow guiding plate 1-3 at the blade root; the bottom of the lower part 4 of the exhaust cylinder body is provided with exhaust cylinder outlets 1-5.
The utility model discloses a high rotational speed superhigh pressure steam turbine is with row's cylinder's theory of operation does: steam of the steam turbine enters the steam exhaust cylinder from a through-flow steam exhaust outlet 1-1 after acting through-flow inner blades, the steam exhaust is uniformly guided into a steam exhaust mixing space through a steam exhaust channel formed by a steam exhaust guide flow 1-2 at the top of the blades and a steam exhaust guide flow 1-3 at the root of the blades, and the steam exhaust of the upper cylinder is converged by a lower semi-flow plate 1-4 and the lower steam exhaust from a middle section channel at the left side and the right side and enters the condenser from a steam exhaust cylinder outlet 1-5.
The lower part 1-7 of the rear bearing box is a part of the exhaust cylinder, the lower lifting plate 1-8 of the rear bearing box and the lifting plate 1-9 of the exhaust cylinder are welded into an integral structure, the upper cover 2 of the rear bearing box and the lower part 1-7 of the rear bearing box are tightly screwed by bolts, the exhaust cylinder and the rear bearing box are integrated into a whole, and the whole body falls on the base frame of the steam turbine.
The utility model discloses the effect:
the exhaust steam cylinder of the utility model is a uniflow, steam flows into the exhaust steam cylinder through the through-flow steam exhaust outlet 1-1, flows along the steam exhaust flow guide and finally flows into the condenser, and the bearing box and the exhaust steam cylinder are integrated; the utility model discloses a steam exhaust cylinder simple structure is compact, has good rigidity, and pneumatic performance is good, and the bearing span is short, and high rotational speed lower shafting stability is good, is favorable to improving the thermal efficiency of whole unit and guarantees unit safety.
The utility model discloses the exhaust steam pressure loss of exhaust steam cylinder is steerable below 3%, effectively improves the efficiency of unit. The mist exhaust water spray heads 1-6 spray water in a mist manner to better ensure the temperature and pressure range of exhaust steam, so that the unit is safer and more reliable to operate.
Drawings
FIG. 1 is a schematic diagram of a steam exhaust casing for a high speed and ultra high pressure steam turbine according to a first embodiment;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;
fig. 5 is a sectional view taken along line B-B of fig. 1.
Detailed Description
The first embodiment is as follows: the embodiment is a steam exhaust cylinder for a high-speed and ultrahigh-pressure steam turbine, as shown in fig. 1-5, and specifically comprises an upper part 1 of a steam exhaust cylinder body, a top steam exhaust guide plate 1-2 of a blade, a root steam exhaust guide plate 1-3 of the blade, a lower semi-guide plate 1-4, a mist steam exhaust water spray head 1-6, a lower part 1-7 of a rear bearing box, a lower lifting plate 1-8 of the rear bearing box, a lifting plate 1-9 of the steam exhaust cylinder, an annular steam exhaust water spray pipe 1-10, a first rib plate 1-11, a second rib plate 1-12, an upper cover 2 of the rear bearing box, a first bolt 3 and a lower part 4 of the steam exhaust cylinder body;
the upper cylinder block part 1 and the lower cylinder block part 4 are fixed together through a plurality of second bolts; a through-flow steam exhaust outlet 1-1 is arranged on the side wall of the same side of the upper part 1 of the steam exhaust cylinder body and the lower part 4 of the steam exhaust cylinder body, a blade top steam exhaust guide plate 1-2 is fixed on the inner wall of the same side of the upper part 1 of the steam exhaust cylinder body and the lower part 4 of the steam exhaust cylinder body, the inlet of the blade top steam exhaust guide plate 1-2 is communicated with the through-flow steam exhaust outlet 1-1, a blade root steam exhaust guide plate 1-3 is fixed on the inner wall opposite to the through-flow steam exhaust outlet 1-1, the blade root steam exhaust guide plate 1-3 and the blade top steam exhaust guide plate 1-2 are both in a horn-shaped structure, and the blade root steam exhaust guide plate 1-3 and the blade top steam exhaust; the outer wall of the exhaust steam guide plate 1-2 at the top of the blade is provided with an annular exhaust steam spray pipe 1-10, a plurality of mist exhaust steam spray nozzles 1-6 are uniformly arranged on the annular exhaust steam spray pipe 1-10, and the annular exhaust steam spray pipe 1-10 is communicated with a water inlet pipe 1-10-1;
the lower part 1-7 of the rear bearing box is embedded and fixed on the outer wall of the lower part 4 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1, the upper cover 2 of the rear bearing box is embedded and fixed on the outer wall of the upper part 1 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1, the lower part 1-7 of the rear bearing box is right below the upper cover 2 of the rear bearing box, and the lower part 1-7 of the rear bearing box and the upper cover 2 of the rear bearing box are fixed through a plurality of first bolts 3; the lower lifting plate 1-8 of the rear bearing box is fixed with the lifting plate 1-9 of the exhaust cylinder; a second ribbed plate 1-12 is arranged between the bottom of the lower part 1-7 of the rear bearing box and the steam exhaust guide plate 1-3 of the blade root;
a plurality of lower semi-conductive flow guiding plates 1-4 are symmetrically arranged on two sides of the middle lower part of the steam exhaust flow guiding plate 1-3 at the blade root, the two lower semi-conductive flow guiding plates 1-4 at the lowest part are respectively fixed with one ends of two first ribbed plates 1-11, and the other ends of the two first ribbed plates 1-11 are fixed on the inner wall of the middle lower part of the steam exhaust flow guiding plate 1-3 at the blade root; the bottom of the lower part 4 of the exhaust cylinder body is provided with exhaust cylinder outlets 1-5.
The working principle of the steam exhaust cylinder for the high-rotating-speed ultrahigh-pressure steam turbine of the embodiment is as follows: steam of the steam turbine enters the steam exhaust cylinder from a through-flow steam exhaust outlet 1-1 after acting through-flow inner blades, the steam exhaust is uniformly guided into a steam exhaust mixing space through a steam exhaust channel formed by a steam exhaust guide flow 1-2 at the top of the blades and a steam exhaust guide flow 1-3 at the root of the blades, and the steam exhaust of the upper cylinder is converged by a lower semi-flow plate 1-4 and the lower steam exhaust from a middle section channel at the left side and the right side and enters the condenser from a steam exhaust cylinder outlet 1-5.
The lower part 1-7 of the rear bearing box is a part of an exhaust cylinder, a lower lifting plate 1-8 of the rear bearing box and the lifting plate 1-9 of the exhaust cylinder are welded into an integral structure, the exhaust guide plate 1-2 at the top of the blade and the lower part 1-7 of the rear bearing box are tightly screwed by bolts, the exhaust cylinder and the rear bearing box are integrated into a whole, and the whole falls on a base frame of a steam turbine.
The effect of the embodiment is as follows:
the exhaust cylinder of the embodiment is a uniflow, steam flows into the exhaust cylinder through the through-flow steam exhaust outlet 1-1, flows along the steam exhaust guide, and finally flows into the condenser, and the bearing box and the exhaust cylinder are integrated; the exhaust steam cylinder of the embodiment has the advantages of simple and compact structure, good rigidity, good pneumatic performance, short bearing span and good shafting stability at high rotating speed, and is beneficial to improving the heat efficiency of the whole unit and ensuring the safety of the unit.
The steam exhaust pressure loss of the steam exhaust cylinder can be controlled below 3%, and the efficiency of the unit is effectively improved.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: and the lower part 1-7 of the rear bearing box is embedded and welded and fixed on the outer wall of the lower part 4 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: and a rear bearing box upper cover 2 is embedded and welded and fixed on the inner wall of the upper part 1 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1. The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: the second ribbed plates 1-12 are semicircular plates. The rest is the same as one of the first to third embodiments.
The fifth concrete implementation mode: the fourth difference between this embodiment and the specific embodiment is that: 8 mist-shaped steam discharge water spray nozzles 1-6 are uniformly arranged on the annular steam discharge water spray pipes 1-10. The rest is the same as the fourth embodiment.
It is right to use the following experiment the utility model discloses verify:
test one: the test is a steam exhaust cylinder for a high-rotating-speed ultrahigh-pressure steam turbine, and as shown in fig. 1-5, the test specifically comprises an upper part 1 of a steam exhaust cylinder body, a top steam exhaust guide plate 1-2 of a blade, a root steam exhaust guide plate 1-3 of a blade, a lower semi-conductor flow plate 1-4, a mist steam exhaust water spray head 1-6, a lower part 1-7 of a rear bearing box, a lower lifting plate 1-8 of the rear bearing box, a lifting plate 1-9 of the steam exhaust cylinder, an annular steam exhaust water spray pipe 1-10, a first rib plate 1-11, a second rib plate 1-12, an upper cover 2 of the rear bearing box, a first bolt 3 and a lower part 4 of the steam exhaust cylinder body;
the upper cylinder block part 1 and the lower cylinder block part 4 are fixed together through a plurality of second bolts; a through-flow steam exhaust outlet 1-1 is arranged on the side wall of the same side of the upper part 1 of the steam exhaust cylinder body and the lower part 4 of the steam exhaust cylinder body, a blade top steam exhaust guide plate 1-2 is fixed on the inner wall of the same side of the upper part 1 of the steam exhaust cylinder body and the lower part 4 of the steam exhaust cylinder body, the inlet of the blade top steam exhaust guide plate 1-2 is communicated with the through-flow steam exhaust outlet 1-1, a blade root steam exhaust guide plate 1-3 is fixed on the inner wall opposite to the through-flow steam exhaust outlet 1-1, the blade root steam exhaust guide plate 1-3 and the blade top steam exhaust guide plate 1-2 are both in a horn-shaped structure, and the blade root steam exhaust guide plate 1-3 and the blade top steam exhaust; the outer wall of the exhaust steam guide plate 1-2 at the top of the blade is provided with an annular exhaust steam spray pipe 1-10, a plurality of mist exhaust steam spray nozzles 1-6 are uniformly arranged on the annular exhaust steam spray pipe 1-10, and the annular exhaust steam spray pipe 1-10 is communicated with a water inlet pipe 1-10-1;
the lower part 1-7 of the rear bearing box is embedded and fixed on the inner wall of the lower part 4 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1, the upper cover 2 of the rear bearing box is embedded and fixed on the inner wall of the upper part 1 of the exhaust cylinder body opposite to the through-flow exhaust outlet 1-1, the lower part 1-7 of the rear bearing box is right below the upper cover 2 of the rear bearing box, and the lower part 1-7 of the rear bearing box and the upper cover 2 of the rear bearing box are fixed through a plurality of first bolts 3; the lower lifting plate 1-8 of the rear bearing box and the steam exhaust lifting plate 1-9 are welded into a whole; a second ribbed plate 1-12 is arranged between the bottom of the lower part 1-7 of the rear bearing box and the steam exhaust guide plate 1-3 of the blade root;
a plurality of lower semi-conductive flow guiding plates 1-4 are symmetrically arranged on two sides of the middle lower part of the steam exhaust flow guiding plate 1-3 at the blade root, the two lower semi-conductive flow guiding plates 1-4 at the lowest part are respectively fixed with one ends of two first ribbed plates 1-11, and the other ends of the two first ribbed plates 1-11 are fixed on the inner wall of the middle lower part of the steam exhaust flow guiding plate 1-3 at the blade root; the bottom of the lower part 4 of the exhaust cylinder body is provided with exhaust cylinder outlets 1-5.
The working principle of the steam exhaust cylinder for the high-rotating-speed ultrahigh-pressure steam turbine in the test is as follows: steam of the steam turbine enters the steam exhaust cylinder from a through-flow steam exhaust outlet 1-1 after acting through-flow inner blades, the steam exhaust is uniformly guided into a steam exhaust mixing space through a steam exhaust channel formed by a steam exhaust guide flow 1-2 at the top of the blades and a steam exhaust guide flow 1-3 at the root of the blades, and the steam exhaust of the upper cylinder is converged by a lower semi-flow plate 1-4 and the lower steam exhaust from a middle section channel at the left side and the right side and enters the condenser from a steam exhaust cylinder outlet 1-5.
The lower part 1-7 of the rear bearing box is a part of an exhaust cylinder, a lower lifting plate 1-8 of the rear bearing box and a lifting plate 1-9 of an exhaust part are fixed into an integral structure, an exhaust guide plate 1-2 at the top of a blade and the lower part 1-7 of the rear bearing box are tightly screwed by bolts, the exhaust cylinder and the rear bearing box are integrated and fall on a base frame of a steam turbine integrally.
The test has the following effects:
the test exhaust cylinder is a uniflow, steam flows into the exhaust cylinder through a through-flow exhaust outlet 1-1, flows along the exhaust flow guide, and finally flows into a condenser, and a bearing box and the exhaust cylinder are integrated; the tested exhaust steam cylinder has the advantages of simple and compact structure, good rigidity, good pneumatic performance, short bearing span and good shafting stability at high rotating speed, and is beneficial to improving the heat efficiency of the whole unit and ensuring the safety of the unit.
The steam exhaust pressure loss of the test steam exhaust cylinder can be controlled below 3%, and the efficiency of the unit is effectively improved.
Claims (5)
1. The exhaust cylinder for the high-rotating-speed ultrahigh-pressure steam turbine is characterized by consisting of an upper part (1) of an exhaust cylinder body, a blade top steam exhaust guide plate (1-2), a blade root steam exhaust guide plate (1-3), a lower semi-conductor flow plate (1-4), a mist steam exhaust water spray head (1-6), a lower part (1-7) of a rear bearing box, a lower lifting plate (1-8) of the rear bearing box, an exhaust cylinder lifting plate (1-9), an annular steam exhaust water spray pipe (1-10), a first ribbed plate (1-11), a second ribbed plate (1-12), an upper cover (2) of the rear bearing box, a first bolt (3) and a lower part (4) of the exhaust cylinder body;
the upper part (1) and the lower part (4) of the exhaust cylinder body are fixed together through a plurality of second bolts; a through-flow steam exhaust outlet (1-1) is arranged on the side wall of the same side of the upper part (1) of the steam exhaust cylinder body and the lower part (4) of the steam exhaust cylinder body, a blade top steam exhaust guide plate (1-2) is fixed on the inner wall of the same side of the upper part (1) of the steam exhaust cylinder body and the lower part (4) of the steam exhaust cylinder body, the inlet of the blade top steam exhaust guide plate (1-2) is communicated with the through-flow steam exhaust outlet (1-1), a blade root steam exhaust guide plate (1-3) is fixed on the inner wall opposite to the through-flow steam exhaust outlet (1-1), the blade root steam exhaust guide plate (1-3) and the blade top steam exhaust guide plate (1-2) are of a horn-shaped structure, and the blade root steam exhaust guide plate (1-3) and the blade top steam exhaust guide plate; the outer wall of the steam exhaust guide plate (1-2) at the top of the blade is provided with an annular steam exhaust spray pipe (1-10), a plurality of mist steam exhaust spray heads (1-6) are uniformly arranged on the annular steam exhaust spray pipe (1-10), and the annular steam exhaust spray pipe (1-10) is communicated with a water inlet pipe (1-10-1);
the rear bearing box lower part (1-7) is embedded and fixed on the outer wall of the lower part (4) of the exhaust cylinder body opposite to the through-flow exhaust outlet (1-1), the rear bearing box upper cover (2) is embedded and fixed on the outer wall of the upper part (1) of the exhaust cylinder body opposite to the through-flow exhaust outlet (1-1), the rear bearing box lower part (1-7) is right below the rear bearing box upper cover (2), and the rear bearing box lower part (1-7) and the rear bearing box upper cover (2) are fixed through a plurality of first bolts (3); a lower lifting plate (1-8) of the rear bearing box is fixed with a lifting plate (1-9) of the exhaust cylinder; a second ribbed plate (1-12) is arranged between the bottom of the lower part (1-7) of the rear bearing box and the steam exhaust guide plate (1-3) of the blade root;
a plurality of lower semi-conductive flow guiding plates (1-4) are symmetrically arranged on two sides of the middle lower part of the steam exhaust flow guiding plate (1-3) at the blade root, the two lower semi-conductive flow guiding plates (1-4) at the lowest part are respectively fixed with one ends of two first rib plates (1-11), and the other ends of the two first rib plates (1-11) are fixed on the inner wall of the middle lower part of the steam exhaust flow guiding plate (1-3) at the blade root; the bottom of the lower part (4) of the exhaust cylinder body is provided with an exhaust cylinder outlet (1-5).
2. The steam exhaust cylinder for the high-speed and ultrahigh-pressure steam turbine according to claim 1 is characterized in that the lower part (1-7) of the rear bearing box is embedded and welded and fixed on the outer wall of the lower part (4) of the steam exhaust cylinder body opposite to the through-flow steam exhaust outlet (1-1).
3. The steam exhaust cylinder for the high-speed and ultrahigh-pressure steam turbine according to claim 1 is characterized in that a rear bearing box upper cover (2) is embedded and welded and fixed on the outer wall of the upper part (1) of the steam exhaust cylinder body opposite to the through-flow steam exhaust outlet (1-1).
4. The steam exhaust cylinder for a high speed and high pressure steam turbine as claimed in claim 1, wherein the second ribs (1-12) are semicircular plates.
5. The steam exhaust cylinder for the high-speed ultrahigh-pressure steam turbine according to claim 1, characterized in that 8 atomized steam exhaust water spray heads (1-6) are uniformly arranged on the annular steam exhaust water spray pipe (1-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020144674.XU CN211648262U (en) | 2020-01-22 | 2020-01-22 | Exhaust steam cylinder for high-rotating-speed ultrahigh-pressure steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020144674.XU CN211648262U (en) | 2020-01-22 | 2020-01-22 | Exhaust steam cylinder for high-rotating-speed ultrahigh-pressure steam turbine |
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| CN211648262U true CN211648262U (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020144674.XU Active CN211648262U (en) | 2020-01-22 | 2020-01-22 | Exhaust steam cylinder for high-rotating-speed ultrahigh-pressure steam turbine |
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| CN (1) | CN211648262U (en) |
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