Manufacture method of poly ether ether ketones (PEEK) nonmetallic honeycomb seal

Abstract

The invention provides a manufacture method of a poly ether ether ketones (PEEK) nonmetallic honeycomb seal. The manufacture method has the main technical characteristics that the honeycomb seal is manufactured and processed by nonmetallic materials of PEEK with the Chinese name of Jumimitong, honeycomb seal blind holes and honeycomb seal core lattices adopt nonmetallic PEEK type materials, and an orthohexagnal blind hole honeycomb seal is manufactured through numerical control processing center drilling, milling or die casting. The honeycomb seal manufactured by the nonmetallic PEEK type materials has the advantages that the materials have the performance of wear resistance, shaft damage prevention, spark avoidance, corrosion resistance, temperature resistance and the like, and the materials are suitable for being made into the nonmetallic honeycomb seal in zero gap matching with a shaft. The manufacture method solves the problems that the sealing leakage quantity of the honeycomb seal manufactured through metal stainless steel vacuum brazing is great, the shaft surface abrasion is caused, in addition, sparks are easy to generate, and the potential safety hazard is caused for flammable and explosive gas work conditions. The manufacture method solves the problems of shaft grinding and great leakage quantity of the honeycomb seal made of metal aluminum materials.

Description

technical field [0001] The invention relates to a honeycomb seal, in particular to a honeycomb seal made of non-metallic material Polyetheretherketone (PEEK for short), which is called polyether ether ketone in Chinese. Background technique [0002] At present, honeycomb seals are used in steam turbines and gas turbines. There are more and more applications of compressors and blowers. The surface of the inner hole of the sealing ring of the honeycomb seal is composed of regular honeycomb diamond-shaped regular hexagonal small honeycomb blind holes, which are sealed by the damping phenomenon generated when the gas passes through the honeycomb grid. At present, the honeycomb seal mainly uses metal stainless steel strips to be vacuum brazed into honeycomb seals, that is, the stainless steel sheet is first processed into regular hexagonal honeycomb strips, and then the honeycomb strips are brazed on the inner surface of the mother seal ring by vacuum brazing technology. . The ...

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Problems solved by technology

The honeycomb seal made of vacuum brazed stainless steel thin strip, if the journal sinks, the stainless steel honeycomb strip will wear the shaft surface and easily generate sparks, which will bring safety hazards to flammable and explosive gas conditions

With the improvement of technology, the metal stainless steel honeycomb seal has been gradually replaced by the honeycomb seal made of metal aluminum. The honeycomb seal made of metal aluminum has the advantage that the friction shaft surface is not easy to generate sparks, but it requires Keep a small fit gap with the journal, and it is easy to grind the shaft when the gap is small and the friction coefficient is high. When designing and using this, the gap between the honeycomb seal made of metal and the shaft needs to be at least 20 channels, so that the equipment medium The gas leakage increases, and it cannot meet the use requirements in some occasions where the leakage of the medium is very strict.

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