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27 如何选择液压油? 答:选择液压油时,应考虑液压泵、阀、执行机构的具体工作条件,也就是说应能保证液压设备正常工作。因此,选择液压油应满足基本要求,如粘性要好,质地应纯净,不易氧化,闪点高,凝固点低,流动性好,防锈性好、润滑性好等。在满足这些基本要求中,粘度是选择液压油的最重要的指标,它对液压系统的运动平稳性、工作可靠性与灵敏性,以及系统的效率、功率损耗、温升等都有显著影响,所以选择液压油时,要根据具体情况或系统要求选用具有合适粘度的液压油品种。通常从以下几方面选用液压油:
27 How to choose the hydraulic oil? A: The choice of hydraulic oil, hydraulic pumps, valves, actuators should consider the specific working conditions, that is to say should be able to ensure the normal operation of hydraulic equipment. Therefore, the choice of hydraulic oil should meet the basic requirements, such as viscosity is better, the texture should be pure, not easy oxidation, high flash point, low freezing point, good liquidity, rust-proof, good lubricity and so on. In meeting these basic requirements, viscosity is the most important indicator of the selection of hydraulic oil, which has a significant impact on the smoothness of the hydraulic system, work reliability and sensitivity, as well as system efficiency, power loss, temperature rise, Therefore, the choice of hydraulic oil, according to the specific circumstances or system selection of hydraulic oil with the right viscosity varieties. Usually from the following aspects of the selection of hydraulic oil: