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電液伺服斜盤柱塞式液壓變壓器的研究

發(fā)布時間:2018-06-10 09:50

  本文選題:液壓變壓器 + 恒壓網(wǎng)絡; 參考:《哈爾濱工業(yè)大學》2013年博士論文


【摘要】:隨著人類社會的發(fā)展,能源問題越來越引起人們的重視,在液壓傳動領(lǐng)域,如何提高液壓系統(tǒng)的效率,降低能耗一直是人們研究的熱點。恒壓網(wǎng)絡二次調(diào)節(jié)技術(shù)一方面可以使動力源工作在高效區(qū),另一方面降低了液壓系統(tǒng)的節(jié)流損失并且可以對負負載的能量進行回收再利用,因此極大的提高了整個液壓系統(tǒng)的傳動效率,有廣闊的應用前景;诤銐壕W(wǎng)絡容積控制的二次調(diào)節(jié)靜液傳動技術(shù)只能應用在旋轉(zhuǎn)負載情況下,當執(zhí)行元件為直線負載時就必須用到液壓變壓器。集成式液壓變壓器將液壓泵/馬達功能集成于一體,結(jié)構(gòu)緊湊、體積小,可以在恒壓網(wǎng)絡容積控制二次調(diào)節(jié)靜液傳動系統(tǒng)中無節(jié)流損失的控制液壓執(zhí)行元件,還可以回收負負載的能量,簡化了液壓系統(tǒng)的結(jié)構(gòu),提高了液壓系統(tǒng)的效率,因此,對集成式液壓變壓器的研究具有重要的理論意義和實用價值。 在查閱大量國內(nèi)外相關(guān)文獻的基礎(chǔ)上,對目前國內(nèi)外研究的液壓變壓器進行了分類,重點分析了集成式液壓變壓器的工作原理及其應用前景,闡述了國內(nèi)外集成式液壓變壓器的應用與發(fā)展狀況,提出了論文的主要研究內(nèi)容。 集成式液壓變壓器是一種新型的液壓元件,首先對其變壓原理進行了理論分析,基于理論分析設(shè)計了電液伺服擺動液壓馬達做為液壓變壓器的伺服驅(qū)動機構(gòu),設(shè)計了一種電液伺服擺動液壓馬達控制的斜盤柱塞式液壓變壓器,實現(xiàn)了液壓變壓器通過電液伺服擺動液壓馬達來進行變壓比的控制,在主軸上設(shè)計配流油路實現(xiàn)液壓變壓器的配流。該電液伺服斜盤柱塞式液壓變壓器具有體積小,結(jié)構(gòu)緊湊,動態(tài)響應快,變壓過程理論上無節(jié)流損失,變壓范圍大等優(yōu)點。 本文基于剩余壓緊力和剩余壓緊力矩法對液壓變壓器的平面配流結(jié)構(gòu)進行了優(yōu)化設(shè)計,并采用遺傳算法進行了求解。采用三角錐作為配流盤緩沖槽的結(jié)構(gòu)形式,建立了過渡過程的壓力緩沖數(shù)學模型并進行了MATLAB仿真,得到了最佳的緩沖槽結(jié)構(gòu)參數(shù),運用ADINA軟件的流固耦合功能進行了配流盤緩沖槽的有限元分析,并對液壓變壓器的噪聲進行了測量。 建立了電液伺服斜盤柱塞式液壓變壓器瞬時流量特性、瞬時轉(zhuǎn)矩特性的數(shù)學模型,從液壓變壓器的控制角為零的情況推廣到控制角為全區(qū)間的情況,仿真結(jié)果表明液壓變壓器的流量脈動率、轉(zhuǎn)矩脈動率在全區(qū)間范圍內(nèi)很大,并對不同柱塞數(shù)下的流量脈動率進行了對比研究。 針對電液伺服斜盤柱塞式液壓變壓器壓力控制的特點,對其控制策略進行了研究。建立了電液伺服斜盤柱塞式液壓變壓器的數(shù)學模型,,采用模糊 PID雙?刂撇呗赃M行壓力控制,在小偏差時,采用PID控制,可以提高系統(tǒng)的穩(wěn)定性和減小誤差,在大偏差時,采用模糊控制,提高系統(tǒng)的快速性和智能性;诶碚摲治龊褪謩涌刂频慕(jīng)驗,對模糊控制器進行了設(shè)計,在MATLAB/Simulink環(huán)境下搭建了仿真模型并進行了仿真研究。 最后,設(shè)計制造了一臺電液伺服斜盤柱塞式液壓變壓器,搭建了實驗平臺,基于C++Builder編寫了測控軟件,基于該實驗系統(tǒng)對電液伺服斜盤柱塞式液壓變壓器進行了實驗研究,對液壓變壓器的性能進行了測試,驗證了理論分析和控制策略的正確性和有效性。
[Abstract]:With the development of human society , the energy problem is attracting more and more attention . In the field of hydraulic transmission , how to improve the efficiency of hydraulic system and reduce energy consumption has been the hot spot .

On the basis of consulting relevant literatures at home and abroad , the paper classifies the hydraulic transformer at home and abroad , emphatically analyses the working principle and application prospect of integrated hydraulic transformer , expounds the application and development of integrated hydraulic transformer at home and abroad , and puts forward the main research contents of the paper .

The integrated hydraulic transformer is a new kind of hydraulic component . Firstly , the principle of pressure transformation is analyzed theoretically . Based on the theory analysis , the servo drive mechanism of the electro - hydraulic servo oscillating hydraulic motor is designed . The hydraulic transformer is controlled by the electro - hydraulic servo oscillating hydraulic motor . The hydraulic transformer is designed with hydraulic servo - swinging hydraulic motor . The hydraulic transformer has the advantages of small volume , compact structure , fast dynamic response , no throttling loss in the theory of pressure swing process , large pressure swing range , etc .

Based on the residual compaction force and the residual compaction torque method , the planar distribution structure of hydraulic transformer is optimized and solved . The mathematical model of pressure buffering in the transition process is established by using the triangular pyramid as the structure of the buffer tank of the distribution plate . The optimum buffer groove structure parameters are obtained . The finite element analysis of the buffer tank of the flow tray is carried out by using the flow - solid coupling function of ADINA software , and the noise of the hydraulic transformer is measured .

A mathematical model of instantaneous flow characteristic and instantaneous torque characteristic of an electro - hydraulic servo swash plate plunger type hydraulic transformer is established . The control angle is extended from the control angle of the hydraulic transformer to the whole area , and the simulation results show that the flow pulsation rate and the torque ripple ratio of the hydraulic transformer are large in the whole range , and the flow pulsation rate under different plunger numbers is compared .

閽堝鐢墊恫浼烘湇鏂滅洏鏌卞寮忔恫鍘嬪彉鍘嬪櫒鍘嬪姏鎺у埗鐨勭壒鐐

本文編號:2002800

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