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为配合“高压抗磨液压油的研制”的八五攻关课题,我们研制了HF-O高压抗磨液压油品试验台。抗磨油的试验方法是:将一定量的高压抗磨液压油分别通过一只叶片泵和一只柱塞泵,在17.5MPa,31-MPa,2400r/min,72～95℃各运行100h,然后通过称重,目测,间隙测量,分析各摩擦副的磨损情况,综合评定油品的各项性能指标。在测试过程中污染度的检测和油的污染度的控制起着关键作用。 1 油液污染的产生和危害性 油液污染主要由三部分组成:(1)杂质污染:杂质可归纳为不溶性杂质和可溶性杂质二类。杂质的来源有系统外部带入的,也有内部产生的,如液压元件和管子装配时,带入的焊渣,切屑,铁锈,磨料等,台架运行时,由于高温,高压及磨损产生的磨粒,油氧化物,密封材料的橡胶碎片等。 杂质将加速零件的磨损,引起划痕,拉毛和阀芯卡死。叶片泵定子磨损与杂质重量成比例增加。杂质过多将使柱塞泵滑靴通道小孔堵塞,不能产生静压支承油膜,引起滑靴表面急剧磨损。 (2)水分污染:试验油在制备,分装,贮存过程中,因密封不当,容易带入水分,油箱冷却时内壁形成的微小水珠也是污染源,水分能引起很多问题,如在泵入口产生气穴和特征
In line with the “high-pressure anti-wear hydraulic oil research,” 85 key issues, we developed the HF-O high pressure anti-wear hydraulic oil test bed. Anti-wear oil test method is: a certain amount of high-pressure anti-wear hydraulic oil through a vane pump and a plunger pump, at 17.5MPa, 31-MPa, 2400r / min, 72 ~ Then through the weighing, visual inspection, gap measurement, analysis of the wear of the friction pair, a comprehensive assessment of the oil performance indicators. In the testing process the detection of pollution and the control of oil pollution play a key role. A fluid pollution and hazardous oil pollution is mainly composed of three parts: (1) impurity pollution: impurities can be classified as insoluble and soluble impurities two categories. Impurities come from outside the system, but also internally generated, such as hydraulic components and pipe assembly, the welding slag, chips, rust, abrasive, etc., gantry operation, due to high temperature, high pressure and wear mill Tablets, oil oxides, sealants and other rubber debris. Impurities will speed up wear and tear of the parts, causing scratches, pinching and spooling. Vane pump stator wear increases in proportion to the weight of the impurities. Excessive impurities will block the plunger pump slide shoe channel hole, can not produce hydrostatic bearing oil film, causing the skid shoe surface rapid wear and tear. (2) Water pollution: During the process of preparation, packaging and storage, the test oil is easy to bring in moisture due to improper sealing. The tiny water drops formed on the inner wall when the oil tank is cooling are also the sources of pollution. Water can cause many problems such as pump entrance Cavitation and features