FIELD: mechanical engineering; engines and piston compressors. SUBSTANCE: ring consists of split metal ring proper and working-in wear-resistant coating applied to outer surface of ring through binder layer. Thickness of coating is variable decreasing towards both sides from ends of ring over arc ϕ=120o. Thickness of coating on rear wall is constant. Owing to such design of ring, forming of sections with different coefficients of friction is prevented which improves operating conditions of ring. EFFECT: improved reliability of piston sealing. 1 dwg
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