密封环是防止液体漏损、保证液压机正常工作的不可缺少的零件。一台压机往往需要几十种或者上百种不同类型和规格的密封环。如果密封不好,一方面由于工作液体的泄漏而造成很大的损耗;另一方面还要经常停机检修,影响生产。尤其是操纵系统和工作缸,如果密封不可靠,则容易引起“串压”,致使操纵不灵或压力上不去,严重的还会出现重大事故。因此,合理选用密封环,正确设计密封模具,不断改进密封结构,以提高密封的可靠性并延 Sealing ring is to prevent liquid leakage, to ensure the normal operation of hydraulic machine indispensable parts. A press often requires dozens or hundreds of different types and sizes of seal rings. If the seal is not good, on the one hand due to the leakage of working fluid caused great loss; the other hand, often downtime maintenance, affecting production. Especially the operating system and the cylinder, if the seal is not reliable, it is easy to cause “string pressure”, resulting in poor control or pressure to go up, there will be serious serious accidents. Therefore, a reasonable choice of seal ring, seal the correct design of the mold, and constantly improve the seal structure, in order to improve the reliability and extension of the seal