本文關(guān)鍵詞：直動(dòng)式高性能比例方向閥虛擬樣機(jī)仿真與試驗(yàn)研究　出處：《浙江理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 比例方向閥 虛擬樣機(jī) 比例電磁鐵 滑閥 電磁力 液動(dòng)力

【摘要】：作為連接現(xiàn)代微電子技術(shù)、計(jì)算機(jī)控制技術(shù)和大功率工程控制設(shè)備之間的橋梁,電液比例控制技術(shù)己在工業(yè)領(lǐng)域獲得廣泛地應(yīng)用。電液比例閥作為電液比例控制系統(tǒng)的重要組成部分,實(shí)現(xiàn)了輸出的液壓量與輸入電信號(hào)按照比例控制,具有廣闊的發(fā)展空間。目前,電液比例閥與伺服閥相比,其性能上的差距正在日益縮小。提高電液比例閥的性能,有助于提高電液比例控制系統(tǒng)的整體特性,在未來擁有廣大的市場(chǎng)前景。本課題對(duì)直動(dòng)式比例方向閥進(jìn)行研究,以其主要部件比例電磁鐵與閥心為研究對(duì)象,分別建立了比例電磁鐵與閥內(nèi)流場(chǎng)虛擬樣機(jī)。主要研究內(nèi)容和結(jié)果如下:(1)以GP45型比例電磁鐵為研究對(duì)象,分別進(jìn)行了磁場(chǎng)的靜、動(dòng)態(tài)仿真與溫度場(chǎng)仿真。通過電磁場(chǎng)靜態(tài)仿真,得到了電磁鐵內(nèi)部磁場(chǎng)的分布情況。利用參數(shù)敏感性分析法,篩選出了前導(dǎo)套管寬度、銜鐵直徑、銜鐵長度、隔磁環(huán)前角等幾個(gè)對(duì)靜態(tài)電磁力影響較大的參數(shù),并對(duì)它們做了靜態(tài)仿真分析,得到了它們對(duì)靜態(tài)行程—力特性的影響規(guī)律。(2)通過磁場(chǎng)動(dòng)態(tài)仿真,對(duì)影響電磁鐵動(dòng)態(tài)性能的結(jié)構(gòu)參數(shù)進(jìn)行了分析,得到了銜鐵吸合運(yùn)動(dòng)規(guī)律,提出通過改變線圈匝數(shù)提高電磁鐵動(dòng)態(tài)特性的方法。通過溫度場(chǎng)仿真,得到不同匝數(shù)下的線圈發(fā)熱情況。最終綜合電磁鐵仿真結(jié)果,確定了一組結(jié)構(gòu)參數(shù)。(3)根據(jù)6通徑與10通徑滑閥結(jié)構(gòu),利用流場(chǎng)虛擬樣機(jī)技術(shù),分別建立流道模型與縫隙流動(dòng)模型。通過仿真分析,得到了不同開口下閥心所受的穩(wěn)態(tài)液動(dòng)力與瞬態(tài)液動(dòng)力以及流道內(nèi)部的流場(chǎng)變化情況,明確了閥心所受總的液動(dòng)力影響。(4)通過對(duì)閥心與閥塊間的縫隙流動(dòng)模型仿真,得到不同縫隙尺寸下的徑向不平衡力以及均壓槽對(duì)徑向不平衡力的影響。根據(jù)仿真結(jié)果,分別對(duì)6通徑與10通徑閥心上的均壓槽進(jìn)行了優(yōu)化。(5)通過試驗(yàn)對(duì)比例電磁鐵與閥內(nèi)流場(chǎng)虛擬樣機(jī)進(jìn)行驗(yàn)證,確定仿真的準(zhǔn)確性。通過對(duì)比例電磁鐵以及閥心結(jié)構(gòu)優(yōu)化,可以有效提高比例方向閥的整體性能。
[Abstract]:As a bridge between modern microelectronic technology, computer control technology and high-power engineering control equipment. The electro-hydraulic proportional control technology has been widely used in the industrial field. As an important part of the electro-hydraulic proportional control system, the electro-hydraulic proportional valve realizes the proportional control of the hydraulic output and the input electrical signal. At present, compared with servo valve, the performance gap of electro-hydraulic proportional valve is narrowing day by day. To improve the performance of electro-hydraulic proportional valve is helpful to improve the overall characteristics of electro-hydraulic proportional control system. In the future, there is a broad market prospect. This paper studies the direct-acting proportional directional valve, taking its main components, proportional electromagnet and valve center as the research object. The main contents and results are as follows: (1) taking GP45 type proportional electromagnet as the research object, the magnetic field is static respectively. Dynamic simulation and temperature field simulation. Through the static simulation of electromagnetic field, the distribution of magnetic field in the electromagnet is obtained. The width of the lead casing, the diameter of armature and the length of armature are screened by the method of parameter sensitivity analysis. Several parameters which have great influence on the static electromagnetic force, such as the front angle of the isolated magnetic ring, are analyzed by static simulation, and the influence law of them on the static travel and force characteristics is obtained. 2) the dynamic simulation of magnetic field is carried out. The structure parameters affecting the dynamic properties of electromagnets are analyzed and the law of the armature suction motion is obtained. A method to improve the dynamic characteristics of electromagnets by changing the number of coil turns is proposed. The simulation of temperature field is carried out. Finally, a set of structure parameters, I. e., a set of structure parameters. According to the six diameter and 10 diameter slide valve structure, the flow field virtual prototyping technology is used. Flow channel model and slot flow model were established respectively. Through simulation analysis, the steady and transient fluid dynamics of valve center under different openings were obtained, as well as the variation of flow field inside the channel. Through the simulation of the gap flow model between the valve center and the valve block. The radial unbalance force under different slot sizes and the effect of the pressure sharing groove on the radial imbalance force are obtained. The pressure sharing slots in the heart of the 6 and 10 diameter valves were optimized. 5) the virtual prototype of the flow field between the proportional electromagnet and the valve was verified by experiments. By optimizing the structure of proportional solenoid and valve center, the overall performance of proportional directional valve can be improved effectively.
【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH137;TP273

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