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With the expanding range of hydraulic drive technology, the increasingly high demands on the reliability of the hydraulic system is running. Become one of the research topics related to enterprise focus. Factors that affect the operational reliability of the hydraulic system, including the choice of hydraulic oil , hydraulic system design, manufacture, installation, commissioning and maintenance and so on. Hydraulic oil in the hydraulic system has four roles: the transmission power, the gap between the lubrication of moving parts, sealing parts, cooling. For hydraulic oil to fully play its role, the choice of oil is very important. The hydraulic oil is clean, not only affect the service life of hydraulic system performance and hydraulic components, and directly related to the hydraulic system is working properly. According to statistics, 70 percent to 85 percent of the hydraulic system failure rate is caused due to the hydraulic oil contamination . Over the years, through our participation in the failure of the hydraulic system for handling and investigating mainly the following three questions the normal working of the hydraulic system, the maintenance process should be noted:
First, to prevent impurities into the hydraulic oil
(1) hydraulic oil into the reasons of impurities
Impurities increase the hydraulic oil in the storage, use, process for two main reasons:
(1) new oil is not added to (or additional) tank through a filter. The new oil may not be clean, because a variety of containers are often used repeatedly, it is difficult to ensure very clean.
(2) fuel long-term preservation and use of the impurities due to oxidation and precipitation, such as gum and carbon deposits.
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keywords: Lubricating oil, hydraulic oil,
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