论文部分内容阅读
在金属衬里的导沟和液压作动筒运动的连杆之间缓慢行进的流动能够在密封元件上建立一个附加流体动力负荷压力。已经测量了不同操作条件对这个压力增强的影响,并和计算的结果进行了比较。在计算值和测量值之间存在-有规律的散度。为了获得直接的解决,由计算公式的偏差表明要作外延的简化假定。这个方法对金属衬里导沟的弹性形变尤其适应。为了在密封件上获得仅仅非常微小的附加压力增强,常常只需要在设计上作微小的变化。实际上是按照H/f到H/e改变导沟和连杆的配合公差,以及按照1到1.5倍连杆的直径缩短金属衬里导沟来解答问题。在密封元件前面的小窒和金属衬里导沟前面的小窒之间作一个放气孔仅仅在少数几种情况下才是必要的。转动的螺旋形沟槽显示出某些象润滑薄膜的遮断以及在压力冲击下动力唇的不时掉荷的有害情况。
Slowly moving flow between the metal liner’s guide channel and the hydraulic ram’s moving link creates an additional hydrodynamic load pressure on the seal element. The effect of different operating conditions on this pressure increase has been measured and compared with the calculated results. There is a regular divergence between the calculated value and the measured value. In order to obtain a direct solution, the deviation from the calculation formula indicates a simplifying assumption to be extended. This method is particularly suitable for the elastic deformation of metal lining guide grooves. In order to obtain only a very slight additional pressure increase on the seal, only minor changes in design are often required. Actually, changing the fitting tolerances of the guide groove and the connecting rod from H / f to H / e and shortening the lining of the metal lining according to the diameter of the connecting rod of 1 to 1.5 times to answer the question. A small blowhole in front of the sealing element and a small gap in front of the metal lining guide channel is only necessary in a few cases. Rotating helical grooves show some of the interceptions of lubricating films and the detrimental effects of the dynamic lip loading from time to time under pressure.