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A turbine inner cylinder structure

A turbine and inner cylinder technology, which is applied in the direction of machine/engine, mechanical equipment, engine components, etc., can solve the problems of the cylinder structure is not compact enough, the sealing performance and bearing strength are reduced, and it is difficult to meet the technical requirements. Technical difficulty of assembly, improved sealing and pressure-bearing performance, and the effect of strong operability

Active Publication Date: 2020-11-10
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these existing technologies, the axially segmented cylinders are axially locked and connected, which must rely on the radially outwardly convex flange structures on the butt joint surfaces of the left and right cylinders. The existence of the flange structure will inevitably increase the structural volume of the cylinder, making the structural volume of the cylinder not compact enough, which in turn will reduce its sealing and pressure-bearing strength in use, and it is still difficult to meet the technical requirements of the above-mentioned high-parameter steam turbine high-pressure cylinder

Method used

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Embodiment 1

[0026] see figure 1 , figure 2 and image 3 As shown, the present invention includes an inner cylinder body, which has a plurality of cylindrical cylinder sections 5 and several tie rod bolts 4 .

[0027] Among them, the cylinder body section 5 of the inner cylinder body is divided into sections according to the relative positions of the stationary vane assemblies 7 of each level and the steam inlet chamber 3, that is, the inner cylinder body is divided into multiple cylinder sections according to the stationary vane assemblies 7 of each level. 5. At the same time, separate the cylinder section corresponding to the first-stage stationary vane assembly from the steam inlet chamber 3 (in particular, in a broad sense, the steam inlet chamber 3 is also a cylinder section, here for clarity, the steam inlet chamber Chamber 3 is listed separately), and each cylinder section 5 is correspondingly installed with a first-stage vane assembly 7 . There are several bolt holes arranged o...

Embodiment 2

[0035] The invention includes an inner cylinder body having a plurality of cylindrical cylinder body sections and a plurality of tie rod bolts.

[0036] Among them, the cylinder body section of the inner cylinder body is divided into segments according to the relative positions of the stationary vane assemblies of each level, that is, the inner cylinder body is divided into multiple cylinder block sections according to the stationary vane assemblies of each level. The corresponding cylinder section is integrated with the steam inlet chamber, and each cylinder section is correspondingly equipped with a first-stage vane assembly. A number of bolt holes are arranged on the wall thickness circumference of each of the aforementioned cylinder sections, among which the bolt holes on the cylinder section corresponding to the first-stage stationary vane assembly are of threaded structure, and the bolt holes on the other cylinder sections are through holes. Hole structure, the bolt hole...

Embodiment 3

[0044] The invention includes an inner cylinder body having a plurality of cylindrical cylinder body sections and a plurality of tie rod bolts.

[0045] Wherein, the cylinder body section of the inner cylinder body is divided into segments according to the relative positions of the first-stage stator vane assembly, specifically, the cylinder block section corresponding to the first-stage stator vane assembly is integrated with the steam inlet chamber, The second-stage and third-stage vane assemblies correspond to one cylinder section, the fourth-stage and fifth-stage vane assemblies correspond to one cylinder section, and so on, so that the cylinders of other stages outside the first-stage cylinder section The body sections correspond to the two-stage vane assemblies respectively. Of course, the number of stages of the vane assemblies corresponding to the cylinder section of the last stage is randomly determined according to the number of stages of the total stationary vane ass...

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Abstract

The invention discloses a turbine inner cylinder structure, which comprises an inner cylinder body, the inner cylinder body has more than two cylindrical cylinder sections and several pull rod bolts, and the wall thickness of each cylinder section is arranged on the circumference There are several bolt holes, and the bolt holes on the circumference of each cylinder block correspond one by one in the axial direction. Corresponding upwards, each tie rod bolt is threaded and locked in the axially corresponding bolt hole of these cylinder segments, and the tie rod bolts of the inner cylinder body respectively lock the cylinder segments into a whole in the axial direction, Form a complete cylindrical inner cylinder. The invention has small outer diameter, compact structure, good sealing performance, and high pressure bearing strength. At the same time, it is beneficial to improve the sealing and pressure bearing performance of the matched outer cylinder, and can fully meet high parameters, especially high parameter steam turbines. technical requirements.

Description

technical field [0001] The invention relates to a turbine inner cylinder structure. Background technique [0002] Turbine equipment needs to rely on cylinders for energy conversion of fluid media, such as steam turbines. Generally, the high-pressure part of a steam turbine, especially a large steam turbine, adopts a double-layer cylinder structure, that is, the inner cylinder and the outer cylinder respectively bear part of the pressure difference and temperature difference of the fluid medium. It can be seen that the inner cylinder is one of the core components of the turbine equipment-steam turbine. [0003] At present, there are mainly two structural forms of the inner cylinder of the turbine. One is the horizontal mid-section locking structure, that is, the upper half of the inner cylinder and the lower half of the inner cylinder are locked into a whole through the high-strength bolts on the horizontal mid-section flange in the direction of heaven and earth (that is, u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/26F01D25/24
CPCF01D25/246F01D25/265
Inventor 张健樊小平王显安廖上斌南春雷马廿段永红王英权汪磊尹刚吴方松罗小川彭林牟余贾鑫张瑞银
Owner DONGFANG TURBINE CO LTD
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