Production method of dual-brush type sealing device

Abstract

A method for manufacturing a double brush sealing device belongs to the manufacturing field of an aeroengine brush sealing device and comprises the following steps: (1) brush wires are wound; metal filaments are wound to be brush bunches which are cut into cantlets that have the tolerance of 0.1-0.5mm; (2) the brush bunches are arranged between an upper plate and a lower plate, wherein, the upperplate and the lower plate are circular ring surfaces, and the angle formed between array of the brush bunches and the tangent of the circumference of the upper plate is 40-53 degrees; (3) welding, the arranged brush bunches are welded between the upper plate and the lower plate to form a seal assembly; (4) inner holes are processed, and the brush bunches in the inner hole of every seal assembly is resected; (5) the two seal assemblies are welded together to form the double brush sealing device. The method has the advantages that the metal filaments are contacted with a shaft all the time, so that the sealing effect is good, leakage is greatly reduced, and the performance of the engine is improved.

Description

A kind of manufacturing method of duplex brush type sealing device technical field The invention belongs to the manufacturing field of aero-engine brush-type sealing devices, and in particular relates to a manufacturing method of a double-connected brush-type sealing device. Background technique The brush seal is an advanced sealing form used in turbomachinery such as aero-engines, and belongs to the contact seal. It is used to reduce the ineffective gas flow between the rotor part and the stationary part of the aeroengine. Instead of traditional grate seals, improve the performance of turbine and turbofan aero-engines. The existing brush seal structure is composed of a group of tightly bundled high-temperature-resistant metal wires with extremely fine diameters and inner and outer rings. Metal wires are required to be arranged neatly and with uniform arrangement density. But the sealing effect of this brush type seal is not good, the process is complicated, and the cos...

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Problems solved by technology

In order to solve the irregular, disordered and bent brush filaments in the existing brush seal device, and it is difficult to ensure that the angle of the brush filaments meets the requirements, and the sealing effect of this brush seal is not obvious, and the process method used is complicated

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