An integral double-layer low-pressure inner cylinder of a steam turbine

An integrated steam turbine technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as deformation and leakage of low-pressure inner cylinders, and achieve the effects of reduced thermal stress, innovative design, and reduced number of openings

Active Publication Date: 2017-12-15
DONGFANG TURBINE CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems existing in the low-pressure inner cylinder of the above-mentioned large-scale unit, and provide an integral double-layer low-pressure inner cylinder of a steam turbine, which not only solves the problem of deformation and leakage of the low-pressure inner cylinder of the large-scale unit, but also solves the problem of low-pressure steam extraction Improve the reliability and economy of the long-term operation of the unit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An integral double-layer low-pressure inner cylinder of a steam turbine
  • An integral double-layer low-pressure inner cylinder of a steam turbine
  • An integral double-layer low-pressure inner cylinder of a steam turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 , figure 2 As shown, when the double-layer integral low-pressure inner cylinder is arranged according to the two-stage regenerative steam extraction, it is left and right symmetrical along the center line of the steam inlet chamber 2; The steam chamber 6; the left and right sections of the inner inner cylinder 4 and the partition cover are all disconnected at the low-pressure secondary heat extraction port 11, forming the left and right low-pressure secondary heat extraction chambers 7.

[0029] The upper half of the double-layer integral low-pressure inner cylinder includes the upper half of the inner cylinder 4 including the steam inlet 1, the upper half of the left partition sleeve 14, the upper half of the right partition sleeve 15, the upper half of the outer and inner cylinder 5, and the upper half of the horizontal flange etc., the steam inlet 1 and the upper half of the inner and inner cylinder 4 are integrally cast, and the partition sleeve is c...

Embodiment 2

[0034] like image 3 , Figure 4 As shown, when the double-layer integral low-pressure inner cylinder needs to arrange three-stage regenerative steam extraction, it is asymmetrical along the center line of the inlet steam, and the left and right sides of the inner inner cylinder 4 itself form a low-pressure-extraction heat extraction cavity Chamber 6; the left section of the inner inner cylinder 4 and the left partition sleeve 14 are disconnected at the low-pressure secondary heat extraction port 11, and the right section of the inner inner cylinder 4 and the right partition sleeve 15 are at the 12 low-pressure three-regeneration heat extraction port Disconnected to form the low-pressure second and third extraction heat extraction chambers 7 and 8 respectively.

[0035] The upper half of the double-layer integral low-pressure inner cylinder includes the upper half of the inner cylinder 4 including the steam inlet 1, the upper half of the left partition sleeve 14, the upper ha...

Embodiment 3

[0040] like Figure 5 , Image 6 As shown, when the double-layer integral low-pressure inner cylinder needs to be arranged with four-stage regenerative steam extraction, it is asymmetrical along the steam inlet centerline, and the inner inner cylinder 4 is provided with low-pressure first and second regenerative steam extraction chambers along the steam inlet centerline The chamber partition plate 17 forms the low-pressure primary and secondary heat extraction chambers 6 and 7 respectively on the left and right sides of the inner cylinder 4 itself; The heat extraction port 12 is disconnected, and the right section of the inner cylinder 4 and the right partition sleeve 15 are disconnected at the low-pressure four-return heat extraction port 13 to form low-pressure three- and four-return heat extraction chambers 8 and 9 respectively. .

[0041] The upper half of the double-layer integral low-pressure inner cylinder includes the upper half of the inner cylinder 4 of the steam i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an integral double-layer low-pressure inner cylinder of a steam turbine, which comprises an outer inner cylinder, an inner inner cylinder, a steam inlet chamber and a partition sleeve; the outer inner cylinder, the inner inner cylinder, the air intake chamber and the partition sleeve are cast or welded as a whole; there are several regenerative steam extraction chambers and corresponding regenerative steam extraction ports arranged on both sides of the steam inlet chamber; the steam inlet chamber has a steam inlet and a steam inlet annular channel; the steam inlet annular There is a complete circle of inner and inner cylinders between the channel and the low-pressure first heat recovery steam extraction port of the outer and inner cylinders, forming a steam expansion flow channel to both ends. In the present invention, by setting up a complete circle of inner cylinders, using the lower space of the low-pressure inner cylinders to arrange low-pressure-regeneration steam extraction ports, the low-pressure steam intake and high-temperature parts can be cooled by reheating and low-pressure steam extraction, and the thermal stress is greatly reduced; There is no need to set up additional cooling steam introduction and drainage systems, and it will not cause interstage steam leakage; at the same time, the number of suction port openings is reduced, the structure is simplified, and the sealing reliability, durability and economy of the low-pressure inner cylinder are improved.

Description

technical field [0001] The invention relates to the structure of a low-pressure inner cylinder of a steam turbine, in particular to an integral double-layer low-pressure inner cylinder of a steam turbine. Background technique [0002] With the development of high-parameter and large-capacity steam turbines, the size of the low-pressure inner cylinder is getting larger and larger, and its rigidity and air-tightness requirements are getting higher and higher. However, the traditional low-pressure inner cylinder has complex structures, poor air-tightness, and easy deformation. , Poor reliability and other issues. The details are as follows: [0003] 1. In the single-layer low-pressure inner cylinder structure of the assembled steam inlet chamber, the radial matching surface of the steam inlet chamber and the low-pressure inner cylinder is connected by a key, and the connection part is provided with radial and axial thermal expansion gaps; The other connecting parts of the inn...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/26F01D25/30
CPCF01D25/26F01D25/30
Inventor 刘金芳史宣平方宇刘东旗范小平张晓东章艳陈铁宁魏小龙罗方朱志坚薛军
Owner DONGFANG TURBINE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap