Special-shaped sealing ring

The invention relates to a special-shaped sealing ring. The special-shaped sealing ring comprises a sealing ring main body (1); the main body is a circular part, and is hollowed inside; and the sealing ring main body (1) comprises an upper plane (A), a lower plane (B) and multiple curved surfaces. The special-shaped sealing ring is more stable in sealing performance, longer in service life and suitable for assembly of various complicated assemblies. Annular grooves (2) are formed in the upper and lower ends of the sealing ring main body (1), so that the contact pressure is increased, and the sealing reliability is improved; and the sealing ring cannot generate higher resistance after long-time placement, so that the piston motion resistance is reduced. 本发明涉及种异形密封圈，包括密封圈主体（1），该主体为圆形部件，其内部镂空；密封圈主体（1）包括上平面（A）、下平面（B）以及多个曲面。本发明的异形密封圈的密封性能更加稳定，使用寿命更长，适用于各类复杂总成的装配。密封圈主体（1）的上下端还开有环形凹槽（2），从而增大了接触压力，提高了密封可靠性；该密封圈长时间放置后不会产生很大的阻力，减小活塞运动阻力。