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Labyrinth damping sealing device with low leakage and high damping performance

A sealing device and high damping technology, applied in the parts of the pumping device for elastic fluid, preventing leakage, supporting elements of blades, etc., can solve problems such as rotor system instability, poor rotor dynamic characteristics, and large cross stiffness , to achieve effective damping, prolong service life and enhance stability

Inactive Publication Date: 2013-03-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with the damping seal, the rotor dynamic characteristics of the labyrinth seal are very poor (the damping produced by it is small, but the cross stiffness is large), which is easy to cause the instability of the rotor system, especially for the rotor system with high pressure ratio and high speed

Method used

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  • Labyrinth damping sealing device with low leakage and high damping performance
  • Labyrinth damping sealing device with low leakage and high damping performance
  • Labyrinth damping sealing device with low leakage and high damping performance

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Embodiment Construction

[0020] The present invention is described in further detail below in conjunction with accompanying drawing:

[0021] see figure 1 , which shows the structure diagram of the labyrinth damping sealing device with low leakage and high damping performance of the present invention. It includes a rotating shaft 1 with a stepped surface and a sealing stator 2 matched with the rotating shaft 1. The rotating shaft 1 is a stepped shaft and includes a plurality of adjacent large-diameter bosses 4 and small-diameter grooves 5. These bosses 4 and The grooves 5 are arranged alternately along the axial direction. The sealed stator 2 is composed of N (N=2, 4, 6, 8) sections of arc-shaped static parts to form a ring structure. Two kinds of sealing teeth are installed on the sealing stator 2: long sealing teeth 6 and short sealing teeth 7. Two short teeth 7 are arranged between every two adjacent long teeth 6, and the two are arranged alternately along the axial direction. The long sealing ...

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Abstract

The invention discloses a labyrinth damping sealing device with low leakage and high damping performance. The sealing device comprises a rotating shaft, sealing long teeth, sealing short teeth and a damping part, wherein the rotating shaft is provided with a plurality of bosses and grooves, which are axially and alternately arranged; and the sealing long teeth, the sealing short teeth and the damping part are fixed on a sealing stator ring. The damping part has the following three structures: a honeycomb structure, a hole structure and a bag structure. The labyrinth damping sealing device has the characteristics of low leakage and high damping; the possibility of causing damage to a rotor and a sealing part due to impact and rubbing between the damping sealing part (which is of a honeycomb structure or a hole structure) and the rotor is also eliminated; and not only can the energy conversion efficiency and the operation stability of a turbomachinery be further improved, but also the service life of the sealing part can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of shaft sealing, and relates to a shaft sealing device of a turbomachinery, in particular to a labyrinth damping sealing device with low leakage and high damping performance. Background technique [0002] Rotary seals are key components in modern turbomachinery, and advanced rotary seal technology can significantly improve the efficiency and reliability of turbomachinery. In turbomachinery, the leakage of working fluid between stator parts and rotor parts is one of the main sources of loss. Therefore, reducing leakage is an effective way to improve the efficiency of turbomachinery, and it is a main goal of turbomachinery design now and in the future. The primary goal in the design and research of rotary seals is to control the flow of working fluid from the high-pressure area to the low-pressure area through the dynamic and static gaps, effectively reducing the leakage and the impact of the leakage flow on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/00F01D5/02F01D9/04F04D29/08
Inventor 李志刚李军
Owner XI AN JIAOTONG UNIV
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