Four-column hydraulic pressSystem oil leakage is one of the common faults of hydraulic transmission system. According to the oil leakage part, it can be divided into two categories: oil leakage and oil leakage at the connection part. The reasons for self-leakage are very complicated. Some new equipment leaks oil, and some old equipment that has been used for more than 10 years does not leak oil. Completely solve their own oil leakage problem, we must find out the factors and ways of oil leakage. The following is a few typical examples to analyze the causes and solutions of self-leakage.
液压件产成品不允许漏油，但由于种种原因，新出厂的液压泵在调试泵站过程中，油温刚达到50℃时，从轴颈处往外漏油。从漏油的部位分析，绝大多数是从低压腔往外漏，也就是从压力腔大量渗油到低压腔(内漏)的油，由于系统中有一定的背压，使低压油的一部分外漏;也有的四柱油压机液压元件低压腔根本不允许回油，如液压泵的轴伸部位。各类液压泵从传动轴伸处向外漏油的情况较普遍，尤其是齿轮泵的轴颈端盖里的自紧旋转橡胶密封圈。此类结构的自身漏油原因有：
(1) The axial clearance of the pump exceeds the specified value, a large amount of pressure oil enters the low pressure area, and the self-tightening rotating rubber sealing ring is flushed to leak oil;
(2)液压机泵在系统中常年使用磨损，使轴向间隙增大，而压力油大量进入低压区，将旋转密封圈冲开向外漏油。
(3) For newly processed and assembled hydraulic pumps, the geometric dimensional tolerance of a component in the manufacturing process exceeds the specified value, or the cumulative dimensional tolerance of several components exceeds the specified value.
GEO-CANARY-86EA1707