【摘要】 测量对旋式通风机两级叶轮的转速是其性能测试与研究中的重要环节,至今现场一直没有一种有效的测速方法。通过叶轮叶尖气压的脉动频率与叶轮转速之间的关系,阐述了通过测量叶尖气压脉动频率来计算叶轮转速的原理和方法。通过现场测试和结果对比,证明了叶尖气压频率法是一种操作简便,结果准确,适用于对旋式通风机的测速方法。更多还原

【Abstract】 The measurement of rev of two impellers is an important part of performance testing and study of the counter-rotating fan,but yet there has no an effective rev measuring method on site.Through the relationship between the pulsation frequency of the pressure in the tip of the impeller blade and the impeller rev,the paper elaborates the principle and the method of calculating the impeller rev by measuring the pulsation frequency of the pressure in the tip of the impeller blade,and then field tests are carried out.The testing results show that this method is easily operated with accurate measurement results,and suitable for the rev measurement of counter-rotating fans.更多还原