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Sealing device, centrifugal compressor and gas turbine

A technology of sealing blades and grate teeth, which is applied to machines/engines, parts of pumping devices for elastic fluids, mechanical equipment, etc., can solve the problems of centrifugal compressor efficiency loss and other problems, so as to improve efficiency and reduce Leakage flow, the effect of increasing the circumferential speed

Pending Publication Date: 2020-11-03
新奥能源动力科技(上海)有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a sealing device, a centrifugal compressor and a gas turbine, which solves the problem of large efficiency loss of the centrifugal compressor

Method used

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  • Sealing device, centrifugal compressor and gas turbine
  • Sealing device, centrifugal compressor and gas turbine

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Embodiment Construction

[0024] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and drawings of the following embodiments are used to illustrate the principle of the present invention, but not to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments.

[0025] In the description of the present invention, it should be noted that, unless otherwise stated, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; The meaning is two or more; the orientation or positional relationship indicated by the terms "inner", "outer", "top", "bottom" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this The invention and the simplified description do not indicate or imply that th...

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Abstract

The invention discloses a sealing device, a centrifugal compressor and a gas turbine. The sealing device comprises an impeller hub, a diffuser body and a sealing part, the sealing part is located between the impeller hub and the diffuser body, the sealing part is arranged on the impeller hub, and the sealing part is located in front of sealing comb teeth in the leakage flow direction of a workingmedium, wherein the sealing part can rotate along with rotation of the impeller hub, so that the kinetic energy of the working medium flowing through the sealing part is reduced. According to the sealing device, when the sealing part rotates along with rotation of the impeller hub, the sealing part does positive work on the working medium in the circumferential direction and the centripetal direction of the impeller hub, and kinetic energy of the working medium flowing through the sealing part is reduced, so that the total pressure between the impeller hub and the diffuser body is greatly reduced, the pressure difference between the front portion and the rear portion of the sealing comb teeth is greatly reduced, the sealing effect is improved, the efficiency loss of the centrifugal compressor is reduced, and the efficiency of the centrifugal compressor is improved.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a sealing device, a centrifugal compressor and a gas turbine. Background technique [0002] A gas turbine is a rotary power machine that uses continuously flowing gas as a working medium to convert heat energy into mechanical work. It is generally composed of three major components: a compressor, a combustion chamber, and a gas turbine. Among them, commonly used compressors include centrifugal compressors and axial flow compressors. [0003] The existing centrifugal compressor utilizes blade force and centrifugal force to convert mechanical energy into gas enthalpy energy. The working medium, such as air, enters the centrifugal compressor, flows through the impeller, the pressure is greatly increased, and then enters the diffuser. At this time, because there is a gap between the impeller and the diffuser, and because the gas pressure of the working gas is much higher than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/08
CPCF04D29/083
Inventor 付玉祥王利民许庆李雨亭王威威郭荣荣韩孟克
Owner 新奥能源动力科技(上海)有限公司
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