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一、概述在涡轮流量计的量程范围内,其输出频率f与流量Q成正比。Q与f的关系为 Q=f/K式中,K为流量系数。当涡轮流量计的使用温度与校验温度相差悬殊时,可按下列公式对校验时的流量系数进行修正 K=K。[1-(β_R+2β_H)(t-t_0)] (2)式中,K_0、K为校验时的流量系数和使用时的流量系数;t_0、t分别为校验、使用时的油液温度;β_R、β_H为叶轮材料、壳体材料的温度膨胀系数。公式(2)表明:涡轮流量计对油液的温度或粘度是很灵敏的。同一台涡轮流量计在不同粘度的油液中使用有不同的流量系数K;对于同一油液但使用温度不同,流量系数K也不相同;即使在同一油液同样温度
First, an overview Turbine flowmeter range, the output frequency f and flow Q is proportional to. The relationship between Q and f is Q = f / K where K is the flow coefficient. Turbine flowmeter when the use of temperature and calibration temperature difference is great, according to the following formula to check the flow coefficient correction K = K. [1- (β_R + 2β_H) (t-t_0)] (2) Where, K_0, K is the flow coefficient of calibration and flow coefficient when used; t_0, t, respectively, Temperature; β_R, β_H for the impeller material, the shell material temperature expansion coefficient. Equation (2) shows that the turbine meter is sensitive to the temperature or viscosity of the fluid. The same turbine flow meter in the different viscosity of the oil used in a different flow coefficient K; for the same oil but the use of different temperatures, the flow coefficient K is not the same; even at the same temperature of the same oil