Force

The forces acting on the piston ring include the gas pressure, the elasticity of the ring itself, the inertia force of the reciprocating motion of the ring, and the friction between the ring and the cylinder and the ring groove. Because of the action of these forces, the ring will produce basic motions such as axial motion, radial motion and rotary motion. In addition, because of its movement characteristics, the piston ring is accompanied by irregular movement, which inevitably causes floating and axial vibration, radial irregular movement and vibration, twisting movement, etc. caused by axial irregular movement. These irregular movements often prevent the piston rings from functioning. When designing the piston ring, we should give full play to the favorable movement and control the unfavorable side.