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材质问题:PY_1系列摇臂式喷头选用的材质,均经过试验考核,具有足够的可靠性。如喷头的摇臂,图纸上规定用铸铝ZL101铸造,可有的厂家却用铸铝ZL102,甚至有的用杂铝配制,又无化验设备,难怪这种材质造的喷头多次发生摇臂断裂的情况。又如小小的减磨密封圈.规定用聚四氟乙烯,这种材料几乎不吸水,滑动摩擦系数又小,适于喷头(低速转动)的工作条件。但有的生产厂竟用尼龙或普通胶圈代替,喷头工作时间一长,密封圈膨胀摩擦阻力越来越大,喷头转速逐渐下降,水力性能变坏。为了让喷头
Material issues: PY_1 series rocker nozzle material selection, have been tested, with sufficient reliability. Such as the nozzle of the rocker, the drawings provided cast aluminum ZL101 casting, but some manufacturers use cast aluminum ZL102, and some even made of miscellaneous aluminum, no laboratory equipment, no wonder this material made the nozzle repeatedly rocker Fracture situation. Another example is the small anti-wear seals. Teflon with provisions, this material is almost non-absorbent, sliding friction coefficient and small, suitable for nozzle (low speed rotation) of the working conditions. However, some manufacturers actually use nylon or ordinary rubber instead, nozzle working time longer, the ring expansion frictional resistance is increasing, the nozzle speed decreased, the hydraulic performance becomes worse. In order to let the nozzle