標準號：DD 208-1992
中文標準名稱：往復式內燃機用*大直徑為200mm的活塞環:帶有窄環寬度的矩形截面活塞環規范
英文標準名稱：Piston rings up to 200 mm diameter for reciprocating internal combustion engines: specification for rectangular rings with narrow ring width
標準類型：J92
發布日期：1992/5/1 12:00:00
實施日期：1992/5/1 12:00:00
中國標準分類號：J92
國際標準分類號：43.060.10
適用范圍：This Technical Report specifies the essential dimensional features of R-, B- and M-rectangular piston ring types with narrow ring width. Dimension tables 8 and 9 allow for the use of cast iron or steel. Since the modulus of elasticity of steel rings is higher than that of cast iron rings, the fluctuation in the surface pressure will become greater if the free gap is set as the reference for forces. Therefore forces are set using the surface pressure as the reference, in order to mininize the effect of the fluctuation. The requirements of this Technical Report apply to rectangular piston rings of reciprocating internal combustion piston engines, up to and including 90 mm diameter for cast iron rings and up to and including 100 mm diameter for steel.It may also be used for piston rings of compressors working under similar conditions.