一种流量调节器的设计与试验研究

Design and Experimental Study of a Flow Regulator

关键词:  可调汽蚀文氏管  流量调节  非线性  调节阀  试验研究

Key words:  Variable area cavitating venturi  Flow regulation  Nonlinearity  Control valve  Experimental study

摘要:

为保证输送系统流量供应的稳定性和准确度，设计了一种新型可调汽蚀文氏管并提供了设计思路，其具有设计简单、线性度好、流量调节范围广等优点。通过理论分析，对该新型可调文氏管的流量计算公式进行了推导，获得流量与行程的关系式。最终选用较小的针锥全角、较大的喉部直径、截断针锥等操作，有效地提高了可调文氏管的线性度。对该可调文氏管进行了水试试验，通过不断调整针锥行程，获取了流量与针锥行程的对应关系。试验结果表明，本文设计的可调文氏管满足10：1的流量调节比要求，同时在超大流量调节比下依旧能够保证较好的线性度，可以作为流量调节器。

Abstract:

In order to ensure the stability and accuracy of the flow supply of the conveying system， a new type of variable area cavitating venturi is designed. It has the advantages of simple design， good linearity and wide range of flow regulation. Through theoretical analysis， the flowrate calculation formulae of the new variable area cavitating venturi were deduced， and the relationship between flowrate and pintle stroke was obtained. Moreover， the linearity of the variable area cavitating venturi was effectively improved by a smaller pintle angle， a larger throat diameter， and cutting off the pintle. The cold water test of the variable area cavitating venturi was carried out， and the corresponding relationship between the flowrate and the pintle stroke was obtained by continuously adjusting the pintle stroke. The experimental results show that the variable area cavitating venturi designed in this paper can meet the requirement of 10：1 flow regulation ratio. At the same time， it can ensure good linearity under the condition of super large flow regulation ratio， and can be used as a flow regulator.