CN212671869U - 30MW grade high-temperature high-pressure condensing steam turbine - Google Patents
30MW grade high-temperature high-pressure condensing steam turbine Download PDFInfo
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- CN212671869U CN212671869U CN202021750760.1U CN202021750760U CN212671869U CN 212671869 U CN212671869 U CN 212671869U CN 202021750760 U CN202021750760 U CN 202021750760U CN 212671869 U CN212671869 U CN 212671869U
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Abstract
A30 MW grade high-temperature high-pressure condensing steam turbine belongs to the field of condensing steam turbines. The utility model discloses it is unreasonable to current 30MW grade steam turbine structural design, cause the problem that unit circulation efficiency is low. The front bearing box is arranged on the ground, the front bearing box is connected with the front part of the cylinder through a centering beam, the front part of the cylinder is connected with the middle part of the cylinder through a vertical flange bolt, the middle part of the cylinder is connected with the exhaust cylinder, and the exhaust cylinder is connected with the rear bearing box; a rear gland sealing body is arranged on the end plate of the rear bearing box, and the rear gland sealing body is arranged at the tail part of the exhaust cylinder and extends into the exhaust cylinder; the exhaust cylinder is of a single-flow forward-inclined lower exhaust structure, and a foot rest at the skirt edge of the exhaust cylinder is located on the bedplate; the exhaust cylinder adopts a steel plate tailor-welded structure and is welded with the rear bearing box into a whole; the high-pressure main steam adjusting combined valve is respectively communicated with the upper half and the lower half of the front part of the cylinder through a steam guide pipe. The utility model discloses can guarantee that the unit has high cycle efficiency.
Description
Technical Field
The utility model relates to a 30MW grade high temperature high pressure condensing steam turbine belongs to condensing steam turbine field.
Background
The existing 30MW grade steam turbine has the problems of unreasonable system design and structural design, high cost and the like due to early molding design; because the structure is unreasonable, the unit has low circulation efficiency and high power supply coal consumption, the energy utilization rate is low, the pollution emission is large, and meanwhile, more agricultural and forestry wastes are generated.
SUMMERY OF THE UTILITY MODEL
To current 30MW grade steam turbine structural design unreasonable, cause the problem that unit circulation efficiency is low, the utility model provides a 30MW grade high temperature high pressure condensing steam turbine.
The utility model relates to a 30MW grade high temperature high pressure condensing steam turbine, which comprises a front bearing box 1, a cylinder front part 2, a cylinder middle part 3, an exhaust cylinder 4, a rear bearing box 5 and a high pressure main steam adjusting joint valve,
the front bearing box 1 is arranged on the ground, the front bearing box 1 is connected with the front part 2 of the cylinder through a centering beam 6, the front part 2 of the cylinder is connected with the middle part 3 of the cylinder through a vertical flange bolt, the middle part 3 of the cylinder is connected with the exhaust cylinder 4, and the exhaust cylinder 4 is connected with the rear bearing box 5; a rear gland sealing body 8 is arranged on an end plate of the rear bearing box 5, and the rear gland sealing body 8 is arranged at the tail part of the exhaust cylinder 4 and extends into the exhaust cylinder 4; the exhaust cylinder 4 is of a single-flow forward-inclined lower exhaust type structure, and a leg rest is arranged on the skirt edge of the exhaust cylinder 4 and is positioned on the bedplate;
the exhaust cylinder 4 adopts a steel plate tailor-welded structure and is welded with the rear bearing box 5 into a whole;
the high-pressure main steam adjusting combined valve is respectively communicated with the upper half and the lower half of the front part 2 of the cylinder through a steam guide pipe.
According to 30MW grade high temperature high pressure condensing steam turbine, back gland casing 8 links to each other with zero clearance sealing ring between with back bearing box 5 and steam exhaust cylinder 4.
According to 30MW grade high temperature high pressure condensing steam turbine, the steam turbine still includes the regulation level blade, and inferior last stage moving blade height is 315mm, and last stage moving blade height is 450 mm.
According to 30MW grade high temperature high pressure condensing steam turbine, all stator blades and the moving blade of cylinder front portion 2 and cylinder middle part 3 all adopt to turn round assembled structure in advance.
According to 30MW grade high temperature high pressure condensing steam turbine, the steam turbine still includes steam turbine rotor 7, steam turbine rotor 7 adopts the rigidity back wheel with generator rotor to be connected.
According to the 30MW grade high temperature high pressure condensing steam turbine of the utility model, the front part 2 and the middle part 3 of the cylinder adopt a single-layer cylinder structure; the corresponding high-pressure outer cylinder and the middle-pressure outer cylinder are cast and adopt high-narrow flange structures.
The utility model has the advantages that: condensing steam turbine has the cylinder efficient, the advantage of high, the with low costs of cycle efficiency.
The utility model discloses in, cylinder high-pressure portion, well splenium and steam extraction jar adopt the individual layer jar to close the jar design, and the steam extraction is downwards carried out to the low pressure steam extraction jar unilateral. The rear gland sealing body connects the rear bearing box and the exhaust cylinder by a zero-clearance sealing ring so as to achieve the sealing effect. The steam exhaust cylinder and the rear bearing box are welded into a whole, so that the whole shafting length of the steam turbine can be shortened, the length of the unit can be shortened to the maximum extent on the premise of ensuring high cycle efficiency and high safety of the unit, and the occupied area of the unit can be reduced; local corn straws, corncobs, rice hulls, wood chips and the like can be used as boiler fuel according to a certain mixing proportion, the annual consumption of agricultural and forestry wastes such as the corn straws, the rice hulls and the like can reach 24.9 ten thousand tons, the space is saved, the coal consumption is reduced, and the construction cost of a power plant is reduced.
Drawings
FIG. 1 is a schematic diagram of a longitudinal section of a 30MW grade high temperature high pressure condensing steam turbine according to the present invention;
FIG. 2 is a front view of the 30MW grade high temperature high pressure condensing steam turbine of the present invention;
FIG. 3 is a top view of FIG. 2;
fig. 4 is a side view of the set adjustment end.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
First embodiment, as shown in fig. 1 to 4, the utility model provides a 30MW grade high-temperature high-pressure condensing steam turbine, which comprises a front bearing box 1, a cylinder front part 2, a cylinder middle part 3, a steam exhaust cylinder 4, a rear bearing box 5 and a high-pressure main steam regulating combined valve,
the front bearing box 1 is arranged on the ground, the front bearing box 1 is connected with the front part 2 of the cylinder through a centering beam 6, the front part 2 of the cylinder is connected with the middle part 3 of the cylinder through a vertical flange bolt, the middle part 3 of the cylinder is connected with the exhaust cylinder 4, and the exhaust cylinder 4 is connected with the rear bearing box 5; a rear gland sealing body 8 is arranged on an end plate of the rear bearing box 5, and the rear gland sealing body 8 is arranged at the tail part of the exhaust cylinder 4 and extends into the exhaust cylinder 4; the exhaust cylinder 4 is of a single-flow forward-inclined lower exhaust type structure, and a leg rest is arranged on the skirt edge of the exhaust cylinder 4 and is positioned on the bedplate;
the exhaust cylinder 4 adopts a steel plate tailor-welded structure and is welded with the rear bearing box 5 into a whole;
the high-pressure main steam adjusting combined valve is respectively communicated with the upper half and the lower half of the front part 2 of the cylinder through a steam guide pipe.
The front bearing box 1 can be located on the front bedplate and is of a landing structure;
further, as shown in fig. 1, the rear gland casing 8 connects the rear bearing housing 5 and the exhaust cylinder 4 by a zero-clearance sealing ring, so as to achieve a sealing effect.
By way of example, the steam turbine also comprises regulating stage blades, the penultimate moving blade height being 315mm and the final moving blade height being 450 mm.
As an example, all the stator blades and rotor blades of the cylinder front part 2 and the cylinder middle part 3 are of a pre-twisted assembly type structure. Compared with the traditional welding partition plate, the pre-twisted assembly type structure has no welding line, avoids welding deformation and can better ensure the steam through-flow precision.
Still further, as shown in fig. 1, the steam turbine further includes a steam turbine rotor 7, and the steam turbine rotor 7 is connected to the generator rotor by a rigid back wheel.
The steam turbine rotor 7 can be a monobloc forging rotor, and can adopt segmented heat treatment to fully utilize material performance. By adopting the segmentation process, the high-temperature strength requirement of the high-temperature section is met, and the performance requirements of the high strength and the low brittle transition temperature value of the low-temperature section are met.
Still further, the front part 2 and the middle part 3 of the cylinder adopt a single-layer cylinder structure; the corresponding high-pressure outer cylinder and the middle-pressure outer cylinder are cast and adopt high-narrow flange structures. The structure can meet the requirement of quick start of the unit, and ensures that the cylinder body has good strength, good rigidity and small thermal stress.
The utility model discloses in, steam gets into the circulation part through high-pressure main vapour regulation combination valve and steam guide pipe, after adjusting the power with 34 levels pressure level, discharges into the condenser through exhaust casing 4 again.
The utility model discloses in, cylinder front portion 2 is equivalent to high-pressure part, and cylinder middle part 3 is equivalent to well splenium.
The utility model discloses in, the dead point of unit cylinder is the crosspoint of the horizontal round pin of the exhaust cylinder bed frame and unit central line, and the cylinder expands or contracts along this point forward bearing box side, and the forward bearing box slides on the bed frame. The relative dead point of the steam turbine rotor is the working surface of the rotor thrust disc, and the steam turbine rotor expands or contracts towards the electric end.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (6)
1. A30 MW grade high temperature high pressure condensing steam turbine is characterized in that the turbine comprises a front bearing box (1), a cylinder front part (2), a cylinder middle part (3), an exhaust cylinder (4), a rear bearing box (5) and a high pressure main steam adjusting joint valve,
the front bearing box (1) is arranged in a floor mode, the front bearing box (1) is connected with the front part (2) of the cylinder through a centering beam (6), the front part (2) of the cylinder is connected with the middle part (3) of the cylinder through a vertical flange bolt, the middle part (3) of the cylinder is connected with the exhaust cylinder (4), and the exhaust cylinder (4) is connected with the rear bearing box (5); a rear gland sealing body (8) is arranged on an end plate of the rear bearing box (5), and the rear gland sealing body (8) is placed at the tail part of the exhaust cylinder (4) and extends into the exhaust cylinder (4); the exhaust cylinder (4) is of a single-flow forward-inclined lower exhaust structure, and a skirt edge footrest of the exhaust cylinder (4) is positioned on the bedplate;
the exhaust cylinder (4) adopts a steel plate tailor-welding structure and is welded with the rear bearing box (5) into a whole;
the high-pressure main steam adjusting combined valve is respectively communicated with the upper half and the lower half of the front part (2) of the cylinder through a steam guide pipe.
2. The 30MW class high temperature and high pressure condensing steam turbine according to claim 1,
and the rear gland casing (8) connects the rear bearing box (5) and the exhaust cylinder (4) by a zero-clearance sealing ring.
3. The 30MW class high temperature and high pressure condensing steam turbine according to claim 1 or 2,
the steam turbine also comprises adjusting stage blades, the height of the moving blade at the penultimate stage is 315mm, and the height of the moving blade at the final stage is 450 mm.
4. The 30MW class high temperature and high pressure condensing steam turbine according to claim 1 or 2,
all the static blades and the moving blades at the front part (2) and the middle part (3) of the cylinder are of pre-twisted assembly structures.
5. The 30MW class high temperature and high pressure condensing steam turbine according to claim 1 or 2,
the steam turbine also comprises a steam turbine rotor (7), and the steam turbine rotor (7) is connected with the generator rotor through a rigid back wheel.
6. The 30MW class high temperature and high pressure condensing steam turbine according to claim 1 or 2,
the front part (2) and the middle part (3) of the cylinder adopt a single-layer cylinder structure; the corresponding high-pressure outer cylinder and the middle-pressure outer cylinder are cast and adopt high-narrow flange structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021750760.1U CN212671869U (en) | 2020-08-20 | 2020-08-20 | 30MW grade high-temperature high-pressure condensing steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021750760.1U CN212671869U (en) | 2020-08-20 | 2020-08-20 | 30MW grade high-temperature high-pressure condensing steam turbine |
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| CN212671869U true CN212671869U (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263452A (en) * | 2022-08-17 | 2022-11-01 | 东方电气集团东方汽轮机有限公司 | Compact turbine cylinder |
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2020
- 2020-08-20 CN CN202021750760.1U patent/CN212671869U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263452A (en) * | 2022-08-17 | 2022-11-01 | 东方电气集团东方汽轮机有限公司 | Compact turbine cylinder |
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