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Shaft seal device

A shaft sealing and rotating shaft technology, which is used in jet propulsion devices, gas turbine devices, and components of pumping devices for elastic fluids, etc., can solve problems such as poor durability, inability to stably prevent leakage for a long time, and achieve high durability. , Superior wear resistance, and the effect of preventing leakage

Active Publication Date: 2012-02-22
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, durability is poor, and leakage cannot be prevented stably for a long time

Method used

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0037] figure 1 It is a schematic configuration diagram of the shaft seal device of the embodiment in the cross section including the axial direction. The shaft seal device 10 is provided between a rotating shaft 1 and a stator (stationary member) 2 of a rotating machine such as a gas turbine, for example, and prevents working fluid from flowing from a high-pressure side region (in the figure 1 Middle, the area on the right) toward the low-pressure side area (in the figure 1 Middle, left area) leakage.

[0038] The shaft seal device 10 of this embodiment can be applied not only to the gas turbine described above, but can also be widely used in large-scale fluid machines such as steam turbines, compressors, water turbines, refrigerating machines, and pumps that use shaft rotation and fluid flow. All rotating machinery that converts energy into work.

[0039...

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Abstract

A shaft seal device for sealing between the outer peripheral surface of a rotating shaft and a stationary member which is provided on the outer peripheral side of the rotating shaft, the shaft seal device comprising: a thin plate seal consisting of thin plates which are arranged in the circumferential direction of the rotating shaft; and an abradable seal consisting of free cutting materials which are arranged at positions different in the axial direction from the position of the thin plate seal and are provided to either the rotating shaft or the stationary member, and also of seal fins which protrude toward said rotating shaft or stationary member from the other.

Description

technical field [0001] The present invention relates to a shaft seal device for sealing the rotating shafts of rotating machines such as gas turbines, steam turbines, compressors, water turbines, refrigerators, and pumps. [0002] This application claims the priority of Japanese Patent Application No. 2009-143124 for which it applied in Japan on June 16, 2009, and uses the content here. Background technique [0003] Generally, in a rotating machine such as a gas turbine or a steam turbine, an annular gap is formed between a stationary member such as a vane and a rotating member such as a rotary shaft. Working fluid leaks from the high-pressure side toward the low-pressure side through the annular gap. To prevent this leakage, a shaft sealing device is used. As one of such shaft sealing devices, a non-contact type labyrinth seal has been widely used conventionally. However, in such a shaft seal mechanism, it is necessary to prevent the front end of the lug from coming into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/447F01D11/00F01D11/02F01D25/00F02C7/28F16J15/22F16J15/453F04D29/08
CPCF01D11/02F16J15/3292F16J15/445F16J15/4472F05D2240/59F05D2240/57
Inventor 上原秀和筱原种宏中野隆西本慎平川裕一
Owner MITSUBISHI HEAVY IND LTD