| 摘要 |
FIELD: machine building.SUBSTANCE: in a piston groove similar top and bottom trapezoidal rings are mirror installed, wherein by large vertical sides they look at the cylinder wall, and an expansion ring, which top inclined end is in contact with the bottom inclined end of the bottom compression ring, by a large vertical side looks at the cylinder axis and has a clearance between the smaller vertical side and the cylinder wall.EFFECT: invention increases the efficiency of a seal between the piston and the cylinder.2 cl, 1 dwg |
