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当工作环境较差、工作压力较高时,液压机的油缸往往都采用多层的夹布橡胶人字形密封。经验证明,这种密封是可靠的,但其摩擦力非常大。当要求运行摩擦力及起动摩擦力都很低时,这种密封就不适合使用。在轧机液压压下系统中采用电液伺服阀实行位置控制的压下油缸,就要求如此。此外,在一些液压测试装置和伺服机构中,以及利用液压来秤重或测力的仪器油缸里,都需要及时动作且又能准确反映出油压的数值。因此,就要寻求一种能够满足上述要求的新型密封。 下面介绍一种用在液压轧机压下油缸
When the working environment is poor, the work pressure is high, the hydraulic cylinder often use multi-layer rubber cloth herringbone seal. Experience has shown that this seal is reliable, but its friction is very large. This seal is not suitable for use when both running friction and starting friction are low. In the rolling mill hydraulic pressure system using electro-hydraulic servo valve position control of the press cylinder, it is required so. In addition, in some hydraulic test devices and servo mechanisms, as well as the use of hydraulic pressure to measure or force the instrument cylinder, the need for timely action and accurately reflect the value of the hydraulic pressure. Therefore, we must seek a new type of seal to meet the above requirements. Described below is used in a hydraulic mill to depress the cylinder