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A flexible seal-rotor system shallow grooved sleeve that improves lift

A flexible sealing, shallow groove technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as reducing delay time, and achieve the effect of reducing leakage, reducing axial leakage, and solving hysteresis

Active Publication Date: 2017-10-03
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the flexible seal has a certain delayed response to the contact of the rotor, it is necessary to rely on the lift of the leaked gas to reduce the delay time

Method used

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  • A flexible seal-rotor system shallow grooved sleeve that improves lift
  • A flexible seal-rotor system shallow grooved sleeve that improves lift
  • A flexible seal-rotor system shallow grooved sleeve that improves lift

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] combine figure 1 , the technical solution adopted in the present invention is: by designing a sleeve device nested on the surface of the rotor, the special structure of the shallow groove surface evenly distributed on the outer surface of the sleeve increases the gas lift of the leakage gas, and this lift makes the flexible seal ( The lower end of the fingertip seal) is lifted in time to improve the adaptability of the flexible seal. The composition of the shallow groove surface sleeve of the seal-rotor system includes a ring sleeve 1, a T-shaped buckle 2 and a shallow groove 3 on the outer surface. The sleeve can be installed as a whole, or assembled from 2-6 fan-shaped rings as required. Among them, the T-shaped buckle is used for clamping between the sleeve and the rotating shaft, and the buckle and the sleeve are integral...

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PUM

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Abstract

The invention provides a flexible seal-rotor system shallow-groove surface sleeve capable of improving lift force, which includes a sleeve main body, T-shaped buckles arranged on the inner side of the sleeve, and shallow grooves evenly arranged on the outer surface of the sleeve. There are two forms of shallow grooves on the outer surface of the sleeve invented in this paper, one is spherical shallow grooves, and the other is honeycomb surface shallow grooves. The sleeve device is fixed on the rotor through a T-shaped buckle and rotates with the rotor at high speed. For flexible seals, the unique shallow groove surface structure can not only reduce axial leakage, but also improve the gas lift of the lower end surface of the seal. The invention solves the technical problem of the hysteresis of the lifting of the lower end surface of the flexible seal (fingertip seal), and improves the self-adaptive ability of the flexible seal to achieve a better sealing effect.

Description

technical field [0001] The invention relates to a sleeve, in particular to a flexible seal-rotor system shallow groove surface sleeve capable of increasing lift force, which is applied to the axial flexible seal of a turbomachinery rotor. Background technique [0002] Due to the development of modern rotor seals towards high speeds, the design purpose of seals tends to greatly reduce the leakage in the sealing passage. For rotor dynamic seals, reducing the wear between the rotor and the seal while preventing leakage is more important than simply reducing leakage. [0003] A large number of numerical calculations and experiments have proved that the high-speed rotating rotor will produce more obvious eccentric whirl, making it easy to rub against the seal, which will damage the rotor and increase the original gap of the seal, reducing the sealing performance. Flexible seals with adaptive capabilities, such as fingertip seals, can solve this problem to a certain extent. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/16
Inventor 张海贾兴运郑群柴柏青
Owner HARBIN ENG UNIV
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