本文選題：PMNT壓電驅(qū)動(dòng)器 + 大流量高速開關(guān)閥��； 參考：《西南科技大學(xué)》2017年碩士論文

【摘要】：高速開關(guān)閥作為一種新型結(jié)構(gòu)閥與傳統(tǒng)的電液伺服閥相比具有體積小、控制精度高、控制靈活度強(qiáng)、成本低廉、抗污染能力強(qiáng)等優(yōu)點(diǎn),特別適合用于煤礦、冶金、鍛壓以及工程等污染環(huán)境特別嚴(yán)重的機(jī)械設(shè)備中。目前高速開關(guān)閥研究領(lǐng)域主要面臨兩大問題:問題一、高速開關(guān)閥的響應(yīng)速率較低;問題二、高速開關(guān)閥的通流量較小。針對(duì)問題一,文中采用PMNT壓電驅(qū)動(dòng)器代替?zhèn)鹘y(tǒng)電磁鐵驅(qū)動(dòng)器,提高響應(yīng)速度,減小安裝尺寸,降低制造成本。針對(duì)問題二,文中采用類并聯(lián)閥芯結(jié)構(gòu),增大高速開關(guān)閥出口流量。文章以所設(shè)計(jì)高速開關(guān)閥為研究對(duì)象,主要完成了以下4項(xiàng)工作:(1)文章中的PMNT壓電驅(qū)動(dòng)器以PWM作為驅(qū)動(dòng)信號(hào),根據(jù)驅(qū)動(dòng)器的工作原理,借助AMESim液壓仿真平臺(tái)建立了壓電驅(qū)動(dòng)器PMNT和常用壓電驅(qū)動(dòng)器PZT的仿真模型,對(duì)比了PMNT與PZT的壓電性,同時(shí)驗(yàn)證了PMNT壓電驅(qū)動(dòng)器的反應(yīng)速率;(2)根據(jù)壓電高速開關(guān)閥的工作原理,應(yīng)用AMESim中的HCD庫建立了高速開關(guān)閥系統(tǒng)仿真模型,研究了不同占空比下,PWM脈沖信號(hào)對(duì)高速開關(guān)閥出口流量穩(wěn)定性的影響以及相同占空比下,不同恒壓源對(duì)高速開關(guān)閥出口流量穩(wěn)定性的影響;(3)根據(jù)所設(shè)計(jì)高速開關(guān)閥的結(jié)構(gòu)尺寸,采用UG建立了高速開關(guān)閥內(nèi)部流道的三維模型,應(yīng)用Fluent中的mesh模塊對(duì)流道模型進(jìn)行網(wǎng)格化分;(4)采用Fluent中的動(dòng)網(wǎng)格技術(shù)對(duì)壓電高速開關(guān)閥在進(jìn)口節(jié)流和出口節(jié)流兩種工況下的內(nèi)部流場做了動(dòng)態(tài)模擬,分析了兩種工況在不同閥芯錐角下的內(nèi)部流場狀況。
[Abstract]:As a new type of structure valve, the high speed switch valve has the advantages of small volume, high control precision, high control flexibility, low cost, strong anti-pollution ability and so on compared with the traditional electro-hydraulic servo valve. It is especially suitable for coal mine, metallurgy, etc.Forging and engineering and other particularly serious pollution of the environment in the machinery and equipment.At present, there are two main problems in the research field of high speed switch valve: one is the low response rate of the high speed switch valve, and the other is the low flow rate of the high speed switch valve.In order to solve the problem, PMNT piezoelectric actuator is used to replace the traditional electromagnet driver to improve the response speed, reduce the installation size and reduce the manufacturing cost.In order to solve the problem, the parallel spool structure is used to increase the outlet flow rate of high-speed valve.This paper takes the designed high speed switch valve as the research object, mainly accomplishes the following four tasks: 1) in this paper, the PMNT piezoelectric driver uses PWM as the driving signal, and according to the working principle of the driver, the PWM piezoelectric actuator is used as the driving signal.Based on the AMESim hydraulic simulation platform, the simulation models of piezoelectric actuator PMNT and common piezoelectric actuator PZT are established. The piezoelectric properties of PMNT and PZT are compared, and the reaction rate of PMNT piezoelectric actuator is verified.The simulation model of high speed switch valve system is established by using HCD library in AMESim. The influence of pulse signal on the flow stability of high speed switch valve under different duty cycle and the same duty cycle are studied.The influence of different constant pressure sources on the flow Stability of High Speed switching Valve outlet the 3D model of internal flow channel of high speed switch valve is established by UG according to the structural size of the designed high speed switch valve.The mesh module in Fluent is used to mesh the flow channel model. (4) the dynamic grid technology in Fluent is used to simulate the internal flow field of the piezoelectric high speed switch valve under the conditions of inlet throttling and outlet throttle.The internal flow field under different cone angle of valve core is analyzed.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH137.52

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉一帆;章文俊;;壓電驅(qū)動(dòng)器建模與控制技術(shù)研究[J];壓電與聲光;2016年03期

2 張迪嘉;姜繼海;;插裝型液壓錐閥流場與氣穴仿真研究[J];液壓與氣動(dòng);2016年04期

3 何曉暉;欒健;王強(qiáng);;基于CFD的液壓錐閥開啟過程流固耦合分析[J];液壓與氣動(dòng);2015年09期

4 姚亞妮;;高速開關(guān)閥及其發(fā)展趨勢[J];山東工業(yè)技術(shù);2015年04期

5 屈鐸;彭利坤;林俊興;倪剛;;基于CFD的球閥閥腔流場的數(shù)值仿真[J];液壓與氣動(dòng);2014年11期

6 汝晶煒;向忠;史偉民;;大流量氣動(dòng)高速開關(guān)閥的優(yōu)化設(shè)計(jì)[J];機(jī)電工程;2014年10期

7 張?jiān)?江志農(nóng);張進(jìn)杰;;往復(fù)式壓縮機(jī)進(jìn)氣閥優(yōu)化設(shè)計(jì)方法研究[J];流體機(jī)械;2014年01期

8 江海兵;阮健;;一種新型大流量高速開關(guān)閥[J];液壓與氣動(dòng);2013年11期

9 李榮;馮永保;劉杰;張安;李西康;;基于Fluent的電磁閥內(nèi)部流場的三維仿真與分析[J];液壓與氣動(dòng);2013年10期

10 趙偉;張凱;黃鈺f，

本文編號(hào)：1770134