本文選題：偏轉(zhuǎn)射流式伺服閥 + 動(dòng)態(tài)模型�。� 參考：《機(jī)械工程學(xué)報(bào)》2016年12期

【摘要】：基于偏轉(zhuǎn)射流式伺服閥工作機(jī)理,提出關(guān)于其動(dòng)態(tài)特性分析及前置級(jí)液動(dòng)力計(jì)算檢測(cè)的問題。建立關(guān)于力矩馬達(dá)、射流盤前置級(jí)以及功率滑閥三部分的完整伺服閥動(dòng)態(tài)模型,確定前置級(jí)液動(dòng)力的近似公式,并對(duì)整閥特性進(jìn)行頻率分析,驗(yàn)證了數(shù)學(xué)模型的正確性;建立伺服閥前置級(jí)內(nèi)部的二維流場(chǎng)模型,并基于流場(chǎng)仿真所獲得的離散數(shù)據(jù),給出兩種可用于計(jì)算穩(wěn)態(tài)液動(dòng)力的方法,即動(dòng)量定理法和壓差法,通過計(jì)算某型伺服閥的液動(dòng)力,驗(yàn)證上述兩種方法能夠相互印證;設(shè)計(jì)并實(shí)現(xiàn)了一種雙自由度的液動(dòng)力測(cè)試平臺(tái),實(shí)現(xiàn)了對(duì)液動(dòng)力的間接測(cè)試。結(jié)果表明,采用動(dòng)量定理法和壓差法計(jì)算得到的液動(dòng)力值,與其近似計(jì)算公式以及試驗(yàn)結(jié)果一致,證明了提出的液動(dòng)力計(jì)算方法與測(cè)試系統(tǒng)均具有可行性,為此類伺服閥的改進(jìn)與優(yōu)化提供了技術(shù)支撐。
[Abstract]:Based on the working mechanism of the deflection jet servo valve, the dynamic characteristic analysis and the dynamic calculation and detection of the front stage hydraulic valve are put forward. The complete servo valve dynamic model about torque motor, jet disc front stage and power slide valve is established, the approximate formula of the front stage fluid power is determined, and the frequency analysis of the whole valve characteristic is carried out to verify the correctness of the mathematical model. The two-dimensional flow field model of the front stage of the servo valve is established. Based on the discrete data obtained from the simulation of the flow field, two methods for calculating the steady-state hydrodynamic force, namely, the momentum theorem method and the pressure difference method, are presented to calculate the hydraulic force of a certain type of servo valve. It is verified that the two methods can be verified and a two-degree-of-freedom hydrodynamic testing platform is designed and implemented. The indirect test of hydraulic power is realized. The results show that the hydrodynamic values calculated by the momentum theorem method and the pressure difference method are consistent with the approximate calculation formula and the experimental results. It is proved that the proposed hydrodynamic calculation method and the test system are feasible. It provides technical support for the improvement and optimization of this kind of servo valve.
【作者單位】： 北京交通大學(xué)機(jī)械與電子控制工程學(xué)院;
【基金】：國(guó)家國(guó)際科技合作專項(xiàng)資助項(xiàng)目(2012DFG71490)
【分類號(hào)】：TH137.52

【參考文獻(xiàn)】

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本文編號(hào)：2027817