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作者用四种不同结构型式的浇注系统模型,通过水力模拟试验证明了不同结构型式的浇注系统,测定的阻力系数ξ值及流量系数μ值不同,作者还用15℃水,25℃水作为室温水,用80℃水代替高温铁水(因80℃水与1355℃高温铁水运动粘度γ值相近似)。实际测定了不同结构浇注系统的流量系数μ及自动模拟区雷诺数Re值,发现15—25℃水与高温铁水流量系数μc值为一个常数,充分说明室温水完全能模拟高温铁水。而不能进入模拟区的浇注系统即低温水不能模拟高温铁水,没有使用价值。根据这个论证,作者认为比较好的铸铁浇口比例为F直∶F横:ΣF内=1∶2.5∶2-3。
The author used four kinds of pouring system models with different structure types to prove the pouring system with different structure types by hydraulic simulation test. The measured resistance coefficient ξ value and flow coefficient μ value were different. The author also used 15 ℃ water and 25 ℃ water as the room Warm water, with 80 ℃ water instead of high temperature hot metal (due to 80 ℃ water and high temperature hot metal 1355 ℃ γ viscosity similar values). The flow coefficient μ and the Reynolds number Re in the automatic simulation zone were measured. It was found that the μc value of the flow coefficient of hot metal in 15-25 ℃ is a constant, which fully shows that the room temperature water can fully simulate the high temperature hot metal. And can not enter the simulation area of the casting system that low-temperature water can not simulate high-temperature hot metal, there is no value. According to this argument, the authors believe that the better cast iron gate ratio F straight: F horizontal: ΣF within = 1: 2.5: 2-3.