CAJ | 학술논문

为了增强多泥沙河流水电站水轮机的抗磨蚀能力,采用各种材料对其表面进行防护.其中,聚氨酯具有良好的弹性和韧性,可以吸收泥沙颗粒的冲击,抗磨效果好.通过对聚氨酯在轴流式和混流式水轮机过流部件抗磨蚀防护的效果分析,得出结论:①在小型机组叶片上有较好的防护效果;②在大型机组固定过流部件上有较好的防护效果;③粘接剂是关键之一;④安全厚度须保证;⑤强空化和尖锐硬物割伤是涂层脱落的主因.
위료증강다니사하류수전참수륜궤적항마식능력,채용각충재료대기표면진행방호.기중,취안지구유량호적탄성화인성,가이흡수니사과립적충격,항마효과호.통과대취안지재축류식화혼류식수륜궤과류부건항마식방호적효과분석,득출결론:①재소형궤조협편상유교호적방호효과;②재대형궤조고정과류부건상유교호적방호효과;③점접제시관건지일;④안전후도수보증;⑤강공화화첨예경물할상시도층탈락적주인.
For advancing the abrasion protection ability of hydraulic turbine in sediment-laden rivers,many materials were used to protect the hydraulic turbine’s surfaces. Thereinto,polyurethane has good flexibility and tenacity,which can absorb the impact of sediment particles,and which anti-wear effect is wel . Through analysis of the effect of anti-abrasion protection of polyurethane to axial and mixed flow hydraulic turbine,the fol owing conclusions could be got.Firstly,polyurethane has good protective effects on vanes in smal units.Secondly,for large units,polyurethane has good anti-abrasion properties on the fixed over-currents.Thirdly,adhesive is one of the keys.Fourthly,thickness must be ensured safety.Fifthly,strong cavitation and sharp hard cut off are the main causes.