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我厂是生产自吸式离心油泵专业厂。泵壳是油泵需要零件之一。其壁厚在6～14mm需经5～12kg/cm~2耐压试验,历时5分钟不渗漏,不冒汗。泵壳造型中有一只(?)形的悬臂泥芯(见合箱图中NO3)其L>3H(3D)是不稳固泥芯。需另外附加支点来支撑砂芯。采用金属芯撑,在此处容易出现渗漏,影响泵的自吸性能。所以过去一直采用拉钩来加固(见图中a情况)这样增加了工时。去年8月我们由实型铸造得以启发,采用聚苯乙烯泡沫塑料块作芯撑(见图中b情况)取得了成功。经过一年的生产实践证明这种方法是可行而有效。现在我厂已推广使用。
Our factory is producing self-priming centrifugal pump professional factory. Pump housing is one of the parts required for the pump. The wall thickness of 6 ~ 14mm by 5 ~ 12kg / cm ~ 2 pressure test, lasted 5 minutes without leakage, no sweating. Pump shell shape has a (?) -shaped cantilever mud core (see box figure NO3) L> 3H (3D) is unstable mud core. Requires additional pivot points to support the sand core. The use of metal brace, where leakage is prone to affect the self-priming pump performance. So in the past, the hooks were used to reinforce (see a), which increased the working hours. Last August we were inspired by solid casting, and we succeeded in using styrofoam blocks for bracing (see case b). After a year of production practice has proved that this method is feasible and effective. Now I plant has been promoting the use of.