As an important part of hydraulic system, hydraulic oil pollution will seriously affect the service life of the system. Therefore, the pollution control of hydraulic oil is crucial to the normal operation of the hydraulic system. A high-efficiency filtration device for engineering polluted hydraulic oil based on triboelectric-coagulation is designed. Different from traditional agglomeration filtration methods such as high-voltage static electricity and external magnetic fields, this work uses the triboelectric effect to charge and agglomerate hydraulic oil particles, and then filters them. The equipment cost is low and the filtration method is green and pollution-free. The theoretical analysis and finite element simulation results proves the feasibility of this filter device. The experimental pipeline was designed and built, and the filtration performance of the polluted hydraulic oil was carried out. The experimental results show that the device has a good interception effect on the solid particles of the polluted hydraulic oil, and the removal rate reaches 99%. This device has strong practicability and broad application prospects, and it is of great significance to purify contaminated hydraulic oil.

作为液压系统的重要组成部分，液压油污染会严重影响系统的使用寿命，因此液压油的污染控制对液压系统的正常运行至关重要。设计了基于摩擦电凝的油。不同于高压静电、外加磁场等传统的凝聚过滤方式，本工作利用摩擦电效应对液压油颗粒进行充电凝聚，然后进行过滤。设备成本低，过滤方式绿色无污染。理论分析和有限元仿真结果证明了该过滤装置的可行性。设计并建造了实验管道，并对被污染的液压油进行过滤性能。实验结果表明，该装置对被污染的液压油中的固体颗粒具有良好的截留效果，去除率达到99%。该装置实用性强，应用前景广阔，对净化受污染的液压油具有重要意义。