Analysis of a Pressure-Compensated Flow Control Valve
Analysis of a Pressure-Compensated Flow Control Valve
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DOI：
10.1115/1.1870037
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发表时间：
2007-03
影响因子：
1.7
通讯作者：
Duqiang Wu;R. Burton;G. Schoenau;D. Bitner
中科院分区：
文献类型：
--
作者：
Duqiang Wu;R. Burton;G. Schoenau;D. Bitner
压力补偿阀（PC阀）是一种流量控制装置，它是一个控制孔和补偿器（通常称为静压器）的组合。补偿器孔口调节其开度以保持通过控制孔口的恒定压降。换句话说，PC阀是这样设计的，通过阀门的流量仅由控制孔的开度决定，与通过阀门的总压降无关。由于与这种类型的阀门相关的高度非线性，在实践中，不可能设计出流量完全不受阀门上压降影响的阀门。本文研究了非线性对PC阀性能的影响。首先，建立了PC阀的通用非线性模型。使用该模型，可以确定所有可能的操作条件。在此基础上建立了线性化模型，并对PC阀的动态特性进行了分析。然后，该模型可用于评估和改进特定应用中阀门的设计和操作。
A pressure-compensated valve (PC valve) is a type of flow control device that is a combination of a control orifice and a compensator (often called a hydrostat). The compensator orifice modulates its opening to maintain a constant pressure drop across the control orifice. In other words, the PC valve is so designed that the flow rate through the valve is governed only by the opening of the control orifice and is independent of the total pressure drop across the valve. Because of the high nonlinearities associated with this type of valve, it is impossible, in practice, to design such a valve where the flow rate is completely unaffected by the pressure drop across the valve. In this paper, the effect of the nonlinearities on the performance of the PC valve is investigated. First, a generic nonlinear model of a PC valve is developed. Using this model, all possible operating conditions can be determined. Then a linearized model is developed and used to analyze the dynamic behavior of the PC valve. The model can then be used to evaluate and improve the design and operation of the valve for specific applications.