SNH440R52U12.1W2三螺杆泵测量方法

SNH440R52U12.1W2三螺杆泵测量方法

测量方法
1流量测量
泵流量测定按GB/T3214的规定。
2压力测量
泵的压力系指换算到泵基准面上的进口、出口压力。
卧式泵的基准面是包括主杆中心线在内的水平面。
立式泵的基准面是包括吸入口中心线在内的水平面。
2.1压力表
泵的压力和真空度的计量，一般采用弹簧压力表和真空表，压力表必须垂直安装，测量仪表的选用应遵守以下原则:

a)每一压力表应在它量程的最优范围内使用(在压力表满刻度的40%~70%之间);
b)刻度盘相邻的两刻度线间隔在1.5 mm~3 mm之间;
c)分度间隔对应的压力示值最大不超过量程的5%。
2.2取压孔
泵进出口取压孔的位置以进出口管径尺寸D计算，应位于进出口法兰2D的平直管线段上，1级试验台应为开设4个静压孔的环形取压。

取压孔的直径应为2 mm~6 mm，长度不小于2.5倍取压孔直径，取压孔的内壁边缘应清除毛刺。
3转速测量
泵转速的测量按GB/T 3216的规定。
4轴功率测量
4.1轴功率测试按GB/T 3216的规定，采用转矩和电功率测量。
4.2采用转矩测量应使转矩和转速做到同步。
4.3当通过测量与泵直接连接的电动机输入功率来确定泵的轴功率时，使用的电动机效率应按GB/T1032和GB/T 1311规定的方法进行确定。

5温度测量
5.1 试验介质的温度、泵零部件的温度及环境温度的测量，均应选用精度为±1℃的温度测量仪器，若选用温度计时

，分度值不大于1℃。
5.2环境温度应在离开泵1 m~2 m，且无辐射和偶然流动的冷热风处测量。
5.3试验介质的温度应在进口平直管段不小于4D的管路内测量，温度计应与管路内流体成45°逆流内装，且温度计的

感温部分应全部置于介质中。
6粘度测量
6.1运动粘度的测量按GB/T 265的规定进行。
6.2试验介质的粘度应定期进行测定，并绘制粘温特性曲线。

SNH440R52U12.1W2三螺杆泵测量方法

SNH440R52U12.1W2三螺杆泵测量方法

SNH440R52U12.1W2三螺杆泵测量方法

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