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Blade-type sealing device

A sealing device and vane-type technology, which is applied in the direction of engine seals, mechanical equipment, engine components, etc., can solve the problems of brush seal failure, increased wear, and excessive wear of the free end of the brush wire, so as to reduce the seal gap and improve the seal. performance, solving uncontrollable effects

Inactive Publication Date: 2013-08-14
南京博沃科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this phenomenon is desirable to some extent, the instability of this phenomenon will eventually cause excessive wear on the free end of the brush filament and damage the rotor, and the brush seal will fail quickly.
In order to solve this problem, technical researchers have proposed the concept of fingertip seal, which greatly reduces the flexibility and increases the rigidity, which can maintain the stability of the seal under working conditions, but the serious "hardening hysteresis effect" of the fingertip seal will follow. Under the action of high pressure difference, a large internal friction force will be generated when retreating due to impact and friction, and it is not easy to return to the original state after retreating, which will aggravate wear and increase leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like Figure 1-3 The blade-type sealing device shown includes an upstream ring, a downstream ring and more than one blade. The blade is a rectangular sheet, one end is fixed between the upstream ring and the downstream ring, and the other end is a free end. The blade is connected to the upstream ring and the downstream ring. The rings are welded connections.

[0040] The length of the blade is 15 mm, the width is 1 mm, and the thickness is 0.1 mm.

[0041] On a plane that passes through the blade and is perpendicular to the axial direction of the rotor of the rotary machine, and along the direction of rotation of the rotor, the angle between the line connecting the blade root of the blade and the axis of the rotor of the rotary machine and the blade is 30°; the blade and the vertical The angle between the faces is 15°.

Embodiment 2

[0043] like Figure 4 The blade-type sealing device shown is basically the same as that of Embodiment 1, the difference is that several blades are made into blade modules that are easy to disassemble and replace, and are clamped between the upstream ring and the downstream ring; the blades have a length of 12 mm and a width of 1.2 mm. mm, with a thickness of 0.15mm. The blade module includes an upper splint, a lower splint and more than one blade. The blade is a rectangular sheet, one end is fixed between the upper splint and the lower splint, and the other end is a free end. The free end of the blade is high An upstream ring and a downstream ring are provided, the upstream ring is adjacent to the upper splint, and the downstream ring is adjacent to the lower splint.

[0044] On a plane that passes through the blade and is perpendicular to the axis of the rotating machinery rotor, and along the direction of rotation of the rotor, the angle between the line connecting the blade...

Embodiment 3

[0046] like Figure 5 The blade-type sealing device shown is basically the same as that of Embodiment 1, the difference is that: the inner diameter of the upstream ring is the same as that of the downstream ring, both of which are larger than the inner diameter determined by the free end of the blade; the back of the blade and the downstream ring are provided with balance Chamber; the length of the blade is 20mm, the width is 1.5mm, and the thickness is 0.2mm.

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Abstract

The invention discloses a blade-type sealing device comprising an upper ring, a lower ring and more than one blade. Each blade is a rectangular sheet with one end fixed between the upper ring and the lower ring and the other end served as the free end. The blade-type sealing device can fully carry on concession flexibility of brush-type sealing and stability of fingertip sealing, sealing gap is greatly narrowed, and sealing performance is improved.

Description

technical field [0001] The invention relates to a vane type sealing device, which is suitable for various rotating machines. Background technique [0002] Sealing technology plays a very important role in modern industrial production and scientific and technological development. Whether it is to improve the development of science and technology and the level of industrial production technology, or in terms of technological transformation and equipment transformation and renewal, sealing technology occupies an important position and plays an important role. [0003] According to whether there is relative movement between the sealing components, the seal can be divided into static seal and dynamic seal; dynamic seal can be divided into reciprocating seal and rotary seal according to the form of motion. Rotary seals are widely used in rotating machinery and equipment. Common rotary seals include mechanical seals, packing seals, labyrinth seals, floating ring seals, brush seals...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/22
Inventor 石伟伟杨建明
Owner 南京博沃科技发展有限公司
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