A high-pressure fingertip and carbon fiber brush combined sealing device

Abstract

The invention discloses a high-pressure fingertip and carbon fiber brush wire combined sealing device. The high-pressure fingertip and carbon fiber brush wire combined sealing device comprises a frontbaffle, high-pressure fingertip sealing fins, a low-pressure fingertip sealing fin, a carbon fiber brush bundle body and a rear baffle. The high-pressure fingertip sealing fins are located on the inner side of the front baffle, and the low-pressure fingertip sealing fin is located on the side portion of the high-pressure fingertip sealing fin. The carbon fiber brush bundle body is located on theside portion of the low-pressure fingertip sealing fin, and the carbon fiber brush bundle body is in contact with the rear baffle. The outer diameter roots of the high-pressure fingertip sealing fins,the low-pressure fingertip sealing fin and the carbon fiber brush bundle body are connected to form a whole through the fusion welding process, and are clamped between the front baffle and the rear baffle to form a fusion welding zone. A fingertip baffle is disposed between the low-pressure fingertip sealing fin and the carbon fiber brush bundle body, and the front baffle, the fingertip baffle, the carbon fiber brush bundle body and the rear baffle are arranged on a rotor in a sleeving mode. The high-pressure fingertip sealing fins of the brush type sealing device has better high-pressure resistance, carbon fiber brush wires have the self-lubricating property, abrasion between the brush wires and the rotor is reduced, and the service life of the brush wires is long.

Description

technical field [0001] The invention belongs to the technical field of sealing devices, and in particular relates to a high-pressure fingertip and carbon fiber brush combined sealing device. Background technique [0002] Most of the traditional sealing devices are grate seals. If the installation gap is too small, it is easy to cause friction between the moving and static parts and damage the equipment; if the installation gap is too large, the leakage will increase and the sealing requirements cannot be met. At the same time, the grate teeth are easy to Wear and tear, and the amount of leakage will gradually increase with the prolongation of equipment operation time. The brush seal device is a kind of contact seal, which is installed with zero gap, which can significantly improve the working efficiency and reliability of high-power steam turbines. It is an ideal replacement product for traditional labyrinth seals. [0003] Generally speaking, the brush seal consists of a p...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-pressure fingertip and carbon fiber brush combined sealing device, which solves the problem of large axial deformation of the existing brush seal under high pressure difference

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