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160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine

A combined cycle and steam turbine technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of affecting the arrangement of the series, occupying a large space, and low unit efficiency, so as to improve the efficiency of the unit, save space, and reduce the occupancy. land area effect

Pending Publication Date: 2019-04-19
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the existing combined cycle steam turbine adopts the form of rotating diaphragm or seat cylinder valve, which occupies a large space, has too long shafting and affects the arrangement of series, and has low efficiency of the unit, it further provides a 160MW class axial turbine. Exhaust Extraction Condenser Combined Cycle Turbine

Method used

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  • 160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine
  • 160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine
  • 160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine

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specific Embodiment approach 1

[0022] Specific implementation mode one: as Figure 1~4 As shown, the 160MW axial exhaust steam extraction condensing combined cycle steam turbine in this embodiment includes a front bearing housing 1, a high pressure cylinder 2, a middle bearing housing 3, an intermediate pressure cylinder 4, a low pressure cylinder 5, an exhaust cylinder 6, a high pressure main steam Adjusting combined valve 7, reheat main steam adjusting combined valve 8 and barring device 9, the bottom plates of front bearing box 1, middle bearing box 3 and exhaust cylinder 6 are installed on the base frame in sequence, and high pressure cylinder 2 is a double-layer cylinder structure. The high-pressure cylinder 2 is located between the front bearing box 1 and the middle bearing box 3. The exhaust side cat claw of the high-pressure cylinder 2 is supported on the front bearing box 1, and the steam inlet side cat claw of the high-pressure cylinder 2 is supported on the middle bearing box 3. The steam inlet s...

specific Embodiment approach 2

[0028] Specific implementation mode two: as figure 1 and image 3 As shown, in this embodiment, the medium pressure cylinder 4 adopts a single-layer casting structure, the low pressure cylinder 5 and the exhaust cylinder 6 adopt a steel plate tailor welded structure, the medium pressure cylinder 4 and the low pressure cylinder 5 are connected by a vertical flange bolt, the low pressure cylinder 5 and the exhaust cylinder The cylinder 6 is connected by a vertical flange bolt, and the medium pressure cylinder 4, the low pressure cylinder 5 and the exhaust cylinder 6 form an axial exhaust steam structure of the combined cylinder.

[0029] With such a design, on the premise of ensuring high cycle efficiency and high safety of the unit, the length of the unit is shortened to the greatest extent, the area occupied by the unit is reduced, space is saved, and the construction cost of the power plant is reduced. Other components and connections are the same as those in the first embod...

specific Embodiment approach 3

[0030] Specific implementation mode three: as image 3 As shown, the high-pressure vanes in the high-pressure cylinder 2 in this embodiment all adopt a pre-twisted assembled structure. With such a design, the assembled structure has no welds, avoiding welding deformation, and better ensuring the flow accuracy. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a 160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine, and relates to a combined cycle steam turbine. The problems that when a combinedcycle steam turbine adopts a rotating partition plate or seat cylinder valve mode, the occupied space is large, the shafting is too long, grade arrangement is influenced, and the unit efficiency is low are solved. A high-pressure cylinder is located between a front bearing box and a middle bearing box, a steam exhaust side claw of the high-pressure cylinder is supported on the front bearing box,a steam inlet side claw of the high-pressure cylinder is supported on the middle bearing box, and a steam inlet side claw of a middle-pressure cylinder is supported on the middle bearing box; and seventeen grades of fixed blade rings are installed in the high-pressure cylinder, twenty seven grades of movable blades are installed on a high-pressure rotor, twenty seven grades of assembling fixed blades are installed on the fixed blade rings, the tops of movable blades of the fixed blade rings are coated with abrasion-resistant coatings, plate bodies of the fixed blades are coated with abrasion-resistant coatings, first ten grades of blade tips of the high-pressure rotor adopt a brush steam sealing mode, and the high-pressure rotor and the fixed blade plate bodies are sealed by adopting the mode of inlaying steam sealing sheets into the rotor. The 160-MW-grade axial steam exhaust and condensate extraction type combined cycle steam turbine is applied to a 160-MW-grade axial steam exhaust and condensate extraction type steam turbine.

Description

technical field [0001] The invention relates to a combined cycle steam turbine, in particular to a 160MW level axial exhaust steam extraction condensing type combined cycle steam turbine. Background technique [0002] At present, most domestic supporting one-to-one combined cycle steam turbines exhaust steam downwards, and the basic operating platform needs to be built more than ten meters. The steam extraction adopts the form of rotating baffles or seat cylinder valves. It is long and affects the arrangement of stages, and the efficiency of the unit is low. Contents of the invention [0003] In order to solve the problems that the existing combined cycle steam turbine adopts the form of rotating diaphragm or seat cylinder valve, which occupies a large space, has too long shafting and affects the arrangement of series, and has low efficiency of the unit, it further provides a 160MW class axial turbine. Exhaust extraction condensing combined cycle steam turbine. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/30F01D9/04F01D11/08F01D19/00F01D25/16
CPCF01D9/041F01D9/042F01D11/08F01D19/00F01D25/16F01D25/30Y02E20/16
Inventor 刘顺华张国军杨国栋王龙洋高敏余海鹏刘世云
Owner HARBIN TURBINE
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