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Seal structure, turbine machine equipped with same, and power plant equipped with said turbine machine

A sealing structure and turbine technology, applied in the fields of power generation equipment and turbines, can solve the problems of flow confusion and mixing loss of mainstream fluids

Active Publication Date: 2015-03-11
MITSUBISHI POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since a part of the main flow fluid is involved in the space portion 55, there is a problem that the flow of the main flow fluid is seriously disturbed and a mixing loss (mixing loss) occurs.

Method used

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  • Seal structure, turbine machine equipped with same, and power plant equipped with said turbine machine
  • Seal structure, turbine machine equipped with same, and power plant equipped with said turbine machine
  • Seal structure, turbine machine equipped with same, and power plant equipped with said turbine machine

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Effect test

no. 1 approach

[0051] figure 1 It is the sealing structure of the gas turbine (turbine) in the power generation facility which concerns on 1st Embodiment, (A) shows the schematic structure diagram, (B) shows the partial enlarged view.

[0052] A gas turbine installed in a power generation facility has: stator blades (not shown) that direct the flow of combustion gas, that is, mainstream gas (main flow fluid) directed into the gas turbine, to a plurality of moving blades (blades) 2; The moving blade 2 on which the mainstream gas acts; the moving blade shroud 3 ( 3 a ), the moving blade shroud 3 ( 3 a ) is arranged at the front end of the moving blade 2 and each adjacent moving blade shroud 3 ( 3 a ) is in contact with each other. It is formed in a cylindrical shape; that is, a turbine housing (structural body) 4 enclosing the rotor blade 2 and the rotor blade shroud (shroud) 3 a.

[0053] The turbine casing 4 is formed in a cylindrical shape surrounding the outer periphery of a rotor blade ...

no. 2 approach

[0074] Hereinafter, a second embodiment of the present invention will be described. The sealing structure of the present embodiment, the turbine equipped with the sealing structure, and the power generation equipment equipped with the turbine are different from the first embodiment in that there is a predetermined gap between the most downstream sealing sheet (sealing unit) 5c. The outer peripheral surface on the downstream side of the rotor blade shroud that is separated by a gap gradually moves away from the inner side of the turbine housing along the flow direction of the mainstream gas acting on the rotor blades, and the rest is the same as that of the first embodiment. Therefore, the same reference numerals are attached to the same configuration and the same flow, and description thereof will be omitted.

[0075] figure 2 It is the seal structure of the gas turbine in the power generation facility concerning 2nd Embodiment of this invention, (A) shows the schematic stru...

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Abstract

A seal structure capable of suppressing disturbance of a main flow of fluid due to leakage fluid is provided. A seal structure includes shrouds (3a) that are provided at tips of a plurality of blades (2) on which a main flow of fluid impinges and that come into contact with adjacent shrouds to form a cylindrical shape; a sealing part (5c) connected to a structure body (4) facing the shrouds (3a); and a space (7) that is defined by downstream sides of the shrouds (3a), a downstream side of the sealing part (5c), and a wall (4b) on a downstream side of the structure body (4), the space and that communicates with the main flow of fluid that has impinged on the blades (2). An end (4d) of the wall (4b) on the downstream side of the structure body (4) is formed so as to be disposed a predetermined distance away from a shroud extension (11) extending toward the downstream side of the shrouds (3a) and away from a sealing-part extension (10) provided substantially parallel to the shroud extension (11) and extending toward the downstream side of the sealing part (5c) and so as to be located on the opposite side of the shroud extension (11) with respect to the sealing-part extension (10).

Description

technical field [0001] The present invention relates to a sealing structure, a turbine equipped with the sealing structure, and a power generating equipment equipped with the turbine, and particularly relates to a sealing structure related to fluid leaking from between a sealing unit and a shroud at the front end of a blade, and a turbine equipped with the sealing structure. A turbine, and power generation equipment including the turbine. Background technique [0002] Generally speaking, if Figure 5 As shown, a rotor blade shroud 53 is provided at each front end of a plurality of rotor blades 51 of the turbine so as to face the turbine housing 52 . The rotor blade shrouds 53 are formed in an annular shape so that adjacent rotor blade shrouds 53 are in contact with each other during the rotation of the aforementioned rotor blades 51 . Between the rotor blade shroud 53 and the turbine housing 52 , a seal portion for connecting a seal fin 54 to the turbine housing 52 side is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D11/02F01D25/00F01D25/24F02C7/28
CPCF01D11/005F01D5/143F01D11/02F01D5/225F01D11/08F01D25/24F02C7/28F01D25/00
Inventor 桑村祥弘松本和幸大山宏治田中良典松尾朝春
Owner MITSUBISHI POWER LTD
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