Technology for spraying corrosion resistant coating on dry screw compressor rotor

A technology of dry screw compressors and spraying anti-corrosion coating, which is applied in the direction of mechanical equipment, machines/engines, rotary piston pumps, etc. It can solve problems such as uneven thickness, poor coating quality, and weak adhesion, and achieve coating The effect of uniform layer thickness, reasonable meshing gap and excellent adhesion
CN100516529CInactive Publication Date: 2009-07-22WUXI COMPRESSOR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUXI COMPRESSOR CO LTD
Publication Date
2009-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a processing method for spraying an anticorrosion layer on a rotor of a dry screw compressor, in particular to spraying a polytetrafluoroethylene anticorrosion layer on the outer surface of the rotor screw of a dry screw compressor, and belongs to the technical field of mechanical spraying technology. It mainly pre-treats the rotor matrix material, anneals the rotor blank for stress relief, then pre-treats the anti-corrosion layer by spraying it, sprays the polytetrafluoroethylene anti-corrosion layer, and finally performs sintering treatment and testing for the finished rotor. The coating thickness of the invention is uniform, the color is black, and has no corrosive effect on the base material of the substrate, the hardness is pencil hardness H-2H, the heat resistance is good, the meshing gap is reasonable, and the tetrafluoro layer is intact; the coating and the base have excellent adhesion Adhesion, no blistering, oxidation, and peeling; under normal operating conditions for dry screw compressors, the service life of the coating can reach more than 24,000 hours, which can ensure that the compression cavity (airway) of the rotor casing does not rust and Can provide pure compressed air.
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Description

technical field

[0001] The invention relates to a processing method for spraying an anticorrosion layer on a rotor of a dry screw compressor, in particular to spraying a polytetrafluoroethylene anticorrosion layer on the outer surface of the rotor screw of a dry screw compressor, and belongs to the technical field of mechanical spraying technology. Background technique

[0002] The corrosion resistance of the air passage of the dry screw compressor and the purity of the gas are the key issues to obtain oil-free and clean compressed air in the dry screw compressor. Since the rotor is a moving part, its rotating speed is high, the spiral profile is complex, and the tolerance range is small. It is not easy to choose a suitable formula and a coating with qualified adhesion. If there is no correct rotor profile and practicable Engage the gap and the coating peels off easily.

[0003] Before the present invention was made, in the prior art, the outer surface of the rotor helix of...

Claims

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