The application of thermal spraying technology in the reciprocating compressor industry
Release time:
2020/03/11
Source:
In the reciprocating compressor industry, thermal spraying technology is mainly used in the manufacturing and repair of wear-resistant (corrosion-resistant) reinforced coatings on the surfaces of parts, as well as in aspects such as restoring the dimensions of parts.Repair, parts size recovery, etc.
(1) The piston rod is an important part of the reciprocating compressor. During the operation of the equipment, the friction surface continuously rubs against the packing, which easily causes wear and scratches on the piston rod.Wear and scratches on the piston rod.Common materials for piston rods include38CrMoAlA、42CrMo、20Crl3、17-4PH(Only used forH^Scorrosive environments), etc. In this case, arc spraying technology can be used to repair damaged piston rods;Conventional repair of damaged piston rods can be carried out using arc spraying technology;Supersonic flame spraying can also be used to spraya tungsten carbide wear-resistant coating, which can greatly improve the wear resistance of the piston rod.After continuous verification,thisthermal spraying process can be used for both surface strengthening of new piston rods and repair of old piston rods, and the matrix microstructure does not change during processing, maintaining the original mechanical properties; the temperature of the parts during processing is low, and no deformation occurs; it has good applicability and is almost unaffected by the size of the parts; it has good polishability; the process is simple and the production cycle is short.The process is simple, and the production cycle is short.
(2) The crankshaft is a main component of the reciprocating compressor, and due to lubricationsystem failures, the main bearing and connecting rod bearing may burn out, causing scratches or burns on the surface of the crankshaft journal and crankpin, resulting in a whole circle of groove-shaped scratches or cracks; severe burns will result in small cracks in a tortoise-shell pattern covering the entire radial surface.Scratches or cracks, and severe burns will result in tiny cracks spreading across the entire radial surface.The conventional method for dealing with this type of damage to the crankshaft is to directly grind away the damaged journaland replace it with a thicker bearing. However, the disadvantageis that the journal diameter will become smaller and smaller with each repair, eventuallyleading to insufficient safety factor for the crankshaft and scrapping; secondly, the thickness of the bearing will become diverse,which is not conducive to compressor maintenance and bearing procurement.It is not conducive to compressor maintenance and bearing procurement.In this case, arc spraying technology can also be used to repair the damaged crankshaft.After repair, the crankshaft is restored to its original size, ensuring the usability of the bearing, eliminating the need to purchase thicker bearings, and facilitating maintenance and procurementmanagement. If damage occurs again, the coating can be ground offand resprayed to ensure the long-term usability of the crankshaft. The long-term usability of the crankshaft can be ensured.
Thermal spraying technology has been used in the reciprocating compressor industry for over 20yearsand is gradually being accepted by the market. Through strength calculations of compressor parts, and under the premise of meeting safety requirements, it has irreplaceable advantages in repairing the dimensions of parts, meeting and improving various performance requirements.It has irreplaceable advantages in repairing parts dimensions and meeting and improving various performance requirements.
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