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14种名义尺寸力2。5和4匣米的涡轮流量计(其中2.5厘米流量计,在未阻塞上游管中平均流速为20米/秒;4厘米流量计的流速为9米/秒)都工作了100小时以上。在最大与最小校准流量按6:1的整个范围内,流量计工作50小时后,校准误差为0.5～1%。可以肯定,在延长使用期的情况下,使用掺玻璃纤维的氟塑料保持架的滚珠轴承就有可能将校准误差减至最小。按试验规定流速使用流量计时,建议工作50～100小时后更换轴承。
14 types of turbine flow meters with nominal dimensions of 2.5 and 4 box meters (2.5 cm flow meter with an average flow velocity of 20 m / s in an unobstructed upstream tube and 9 m / s flow rate with a 4 cm flow meter) Worked for more than 100 hours. The calibration error is 0.5 to 1% after the flowmeter has been operating for 50 hours over a 6: 1 maximum and minimum calibration flow rate. To be sure, the use of glass fiber-reinforced fluoroplastic cage ball bearings could minimize calibration errors for extended periods of use. According to the test flow rate when using the flow meter, it is recommended to work after 50 to 100 hours to replace the bearing.