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Methodology for design of a vibration operated valve for abrasive viscous fluids.

机译：设计用于磨料粘性流体的振动阀的方法。

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摘要

In this research, a new ultrasonic operated valve was analyzed, prototyped, and tested for use in an abrasive viscous fluid application. The innovative valve concept is based on controlling the friction of material by employing several friction elements along the flow direction. Abrasive particles in the viscous fluid are stopped by the force of friction when coming into contact with the friction elements. Friction is neutralized by use of vibration to break away the abrasive particles from the friction element surfaces. Several factors were considered in designing the piezoelectric valve. Factor identification was done by conducting experiments and analyzing data. Some important factors that affect the valve design were recognized to be back pressure, size of friction blades along the direction of flow, density of material, viscosity, amplitude, frequency of vibration, and proportion of particles in the mix. First, a method was designed for measuring the friction coefficient of the given viscous materials. A design of experiment approach was pursued in order to identify the significant parameters. A piezoelectric transducer was used, which vibrated at the resonance frequency of 20 kHz. FEM modeling was used at that stage to ensure that the resonance frequency of the designed valve matched the resonance frequency of the transducer and booster that provided vibration. In order to perform proportional flow control, pulse width modulation was used to control the duty cycle of ultrasonic power transferred to the valve. A study was performed to find the best vibration performance for the parameters in the range of operation.
机译：在这项研究中，对一种新的超声操作阀进行了分析，原型设计和测试，以用于磨料粘性流体应用。创新的阀门概念基于通过沿流动方向采用多个摩擦元件来控制材料的摩擦。当与摩擦元件接触时，粘性流体中的磨料颗粒被摩擦力阻止。通过使用振动来中和摩擦，以使磨料颗粒从摩擦元件表面脱离。设计压电阀时考虑了几个因素。通过进行实验和分析数据来完成因素识别。影响阀设计的一些重要因素被认为是背压，沿流动方向的摩擦片尺寸，材料密度，粘度，振幅，振动频率以及混合物中颗粒的比例。首先，设计了一种用于测量给定粘性材料的摩擦系数的方法。为了确定重要参数，进行了实验方法的设计。使用压电换能器，其以20 kHz的共振频率振动。在那个阶段使用FEM建模来确保设计阀的共振频率与提供振动的换能器和助力器的共振频率相匹配。为了执行比例流量控制，使用了脉冲宽度调制来控制传递到阀的超声功率的占空比。进行了一项研究，以找到运行范围内参数的最佳振动性能。

著录项

  • 作者

    Behdinan, Khashayar.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 117 p.
  • 总页数 117
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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