Standard No.:	GB/T 1149.17-2023
English Name:	Internal combustion engines—Piston rings—Part 17:Coil-spring-loaded oil control rings made of steel
Chinese Name:	内燃机 活塞环 第17部分：钢质螺旋撑簧油环
Chinese Classification:	J92    Engine body and moving parts
Professional Classification:	GB    National Standard
Issued by:	SAMR; SAC
Issued on:	2023-12-28
Implemented on:	2024-7-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	18500 words
Price(USD):	555.0
Delivery:	via email in 1~5 business day

Internal combustion engines - Piston rings - Part 17: Coil-spring-loaded oil control rings made of steel 1 Scope This document specifies the essential dimensions of coil-spring-loaded oil control rings made of steel, of piston ring types SOR (with R-shaped groove) and SOV (with V-shaped groove). This document applies to coil-spring-loaded oil control rings made of steel with a diameter from 60 mm up to and including 160 mm for reciprocating internal combustion engines. It can also be used for piston rings in compressors working under analogous conditions. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6621-3 Internal combustion engines - Piston rings - Part 3: Material specifications Note: GB/T 1149.3-2010, Internal combustion engines - Piston rings - Part 3:Material specifications (ISO 6621-3:2000, IDT) ISO 6621-4 Internal combustion engines - Piston rings - Part 4: Gerneral specifications Note: GB/T 1149.1-2008, Internal combustion engines - Piston rings - Part 1: General specifications (ISO 6621-4:2003, IDT) ISO 6621-5 Internal combustion engines - Piston rings - Part 5: Quality requirements Note: GB/T 1149.4-2008, Internal combustion engines - Piston rings - Part 4:Quality requirements (ISO 6621-5:2005, IDT) 3 Terms, definitions and symbols 3.1 Terms and definitions No terms and definitions are listed in this document. 3.2 Symbols a1 radial wall thickness a4 groove depth a12 radial thickness over coil spring a13 groove depth and bridge a17 external land depth B3 land spacing c1 slot width d1 nominal diameter (nominal bore diameter) d7 coil-spring diameter d14 coil-spring groove diameter for type SOR f1 coil-spring excursion Ft tangential force h1 ring width h5 land width p0 contact pressure s1 closed gap w1 slot length w3 slot spacing α land angle inside β land angle outside θ groove angle for type SOV Note: These symbols (including associated indices) are in accordance with the symbols used in ISO 6621 (all parts), ISO 6622 (all parts), ISO 6623, ISO 6624 (all parts), ISO 6625, ISO 6627 and other parts of the ISO 6626 series. 4 Piston ring types and designation examples 4.1 Type SOR - Steel oil control rings with R-shaped groove 4.1.1 General features and dimensions Figure 1 shows the general features and dimensions of piston ring type SOR.