微弧氧化技术在高压齿轮水泵中的应用

为了在良好的加工工艺和高性价比前提下,提高水压元件的摩擦磨损特性和耐蚀性能,利用微弧氧化技术在常规液压元件的工作表面制备陶瓷化涂层,使其能直接应用于水压传动系统.应用该技术在材质为ADC12的高压齿轮泵的浮动侧板表面原位生成致密的陶瓷氧化层,其厚度可达130m以上,硬度可达HV1000以上.将经过陶瓷化处理的高压齿轮泵用于水压传动试验表明,该泵工作运行稳定,最高出口压力可达16MPa.在现阶段整体工程陶瓷元件应用于水压传动尚不成熟的情况下,使用微弧氧化技术进行元件表面改性是一种经济可行的方法.

Application of microarc oxidation to high-pressure gear pump

In order to improve the friction-wear character and corrosion-resistance property of the surface of hydraulic component on the premise of excellent processing technique and high ratio of performance to cost,a ceramic layer was generated on the working surface of a hydraulic pump using ceramic coating technology-MAO(Microarc oxidation).Thus gear pumps currently used in oil hydraulic transmission system can be utilized in water power transmission system without any else modification.The surface of the movable endplate of a high pressure gear pump made of ADC12 aluminium(Al)alloy is treated with MAO,and a more than 130 m compact ceramic layer with the hardness up to HV1000 was developed.The trial test result in a water power transmission system showed that the gear pump with treated component operated smoothly and the maximum outlet pressure reached to 16Mpa.MAO is an economical and feasible technique to improve the surface property of hydraulic component under the condition that complete ceramic component is not mature in water power transmission at present.