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  本文關(guān)鍵詞：大功率磁流變傳動技術(shù)及溫度效應(yīng)研究　出處：《中國礦業(yè)大學(xué)》2014年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 磁流變液 大功率磁流變傳動技術(shù) 溫度特性 調(diào)速控制 溫度補(bǔ)償技術(shù) 水冷方式 熱流耦合場 動力傳遞 散熱 許用滑差功率

【摘要】：磁流變傳動以磁流變液為工作介質(zhì)，依靠傳動界面間磁流變液的剪切應(yīng)力來傳遞動力，通過控制外加磁場強(qiáng)度實(shí)現(xiàn)傳遞扭矩的無級調(diào)定。作為一種新型動力傳遞形式，它具有反應(yīng)迅速可逆、控制簡單且能耗低、抗外界干擾能力強(qiáng)等特點(diǎn)，在機(jī)電設(shè)備軟啟動、軟制動、無級調(diào)速和過載保護(hù)等方面具有廣泛的應(yīng)用前景。針對當(dāng)前磁流變傳動技術(shù)研究中存在的問題，本文將就以下幾個(gè)方面開展深入研究。 分別從宏觀和微觀兩方面闡述了磁流變效應(yīng)的形成機(jī)理和磁流變液的本構(gòu)模型，詳細(xì)介紹了磁流變液的基本組成和主要性能指標(biāo)；結(jié)合理論分析和實(shí)驗(yàn)測試研究了磁流變液各組分材料性能的溫度特性，包括軟磁性顆粒的磁化性能、基載液的動力粘度和熱膨脹特性；采用基液置換法制備出多種磁流變液樣品，并分別測試了磁流變液樣品的磁溫特性、剪切應(yīng)力—溫度特性以及溫度穩(wěn)定性，得到了溫度對磁流變液材料性能的影響機(jī)理和影響規(guī)律。 介紹了磁流變調(diào)速控制系統(tǒng)的基本組成及控制原理和特點(diǎn)，建立系統(tǒng)輸出轉(zhuǎn)速控制數(shù)學(xué)模型，并對調(diào)速起動的時(shí)間響應(yīng)進(jìn)行數(shù)值計(jì)算，分析了勵磁電流、輸入轉(zhuǎn)速和負(fù)載扭矩對響應(yīng)時(shí)間的影響；計(jì)算了調(diào)速過程中磁流變液的溫度變化以及由此引發(fā)的傳遞扭矩下降值，，并建立考慮溫度效應(yīng)的速度控制模型以分析溫度變化對磁流變調(diào)速控制的影響，進(jìn)而提出一種微調(diào)電流補(bǔ)償方式來彌補(bǔ)溫升引起的扭矩下降，并對采用溫度補(bǔ)償前后的調(diào)速控制性能進(jìn)行對比研究。 針對大功率動力傳遞應(yīng)用場合的要求，設(shè)計(jì)了一種新型大功率磁流變傳動裝置；利用ANSYS軟件對所設(shè)計(jì)磁路進(jìn)行有限元仿真，得到了磁場總體分布規(guī)律以及工作間隙中磁感應(yīng)強(qiáng)度的分布特點(diǎn)和影響因素，并通過電磁場實(shí)驗(yàn)予以驗(yàn)證；從理論研究方面分析了工作磁感應(yīng)強(qiáng)度和主、從動盤角速度差等因素對所設(shè)計(jì)的磁流變傳動裝置動力傳遞和調(diào)速控制性能的影響規(guī)律。 基于流體計(jì)算控制方程和溫度場計(jì)算方程，建立磁流變傳動裝置熱流耦合數(shù)學(xué)模型，并利用計(jì)算流體動力學(xué)軟件CFX進(jìn)行數(shù)值模擬，得到了不同工況下傳動裝置內(nèi)部冷卻液的速度場、壓力場以及傳動裝置的穩(wěn)態(tài)和瞬態(tài)溫度場，并分析滑差功率、旋轉(zhuǎn)速度、進(jìn)水速度和溫度以及冷卻液特性等因素對磁流變傳動裝置熱流耦合場的影響。 設(shè)計(jì)并研制了大功率磁流變傳動實(shí)驗(yàn)系統(tǒng)，對大滑差功率下磁流變傳動裝置的動力傳遞和響應(yīng)性能以及磁流變液的溫升特性開展大量實(shí)驗(yàn)研究，并分別測試了該傳動裝置的最大許用穩(wěn)態(tài)和瞬態(tài)滑差功率，結(jié)果驗(yàn)證了所設(shè)計(jì)的大功率磁流變傳動裝置的可靠性和水冷散熱方式的有效性。 本文所取得的研究成果對于磁流變傳動技術(shù)的深入研究具有重要的指導(dǎo)意義，能夠?yàn)榇蠊β蚀帕髯儌鲃友b置的設(shè)計(jì)和磁流變傳動技術(shù)的推廣應(yīng)用提供技術(shù)支持。
[Abstract]:The magneto - rheological fluid is used as the working medium , and the power is transmitted by the shear stress of the magnetorheological fluid between the transmission interfaces . As a new form of power transmission , it has the characteristics of rapid and reversible reaction , simple control , low energy consumption , strong anti - interference ability and the like , and has wide application prospect in the aspects of soft start , soft braking , stepless speed regulation and overload protection of the electromechanical equipment . The formation mechanism of magneto - rheological fluid and the constitutive model of magneto - rheological fluid are expounded from both macroscopic and microscopic aspects . The basic composition and main performance indexes of magnetorheological fluids are described in detail . The properties of the materials of the magnetorheological fluids are studied by combining theory analysis and experimental tests . The magnetic temperature characteristics , shear stress , temperature characteristics and temperature stability of the magnetorheological fluid samples are respectively tested , and the influence mechanism and the influence law of the temperature on the properties of the magnetorheological fluid material are obtained . This paper introduces the basic composition and control principle and characteristics of the magneto - rheological control system , establishes the mathematical model of the output speed of the system , calculates the response time of the excitation current , the input speed and the load torque , and establishes a speed control model considering the temperature effect to analyze the influence of the temperature change on the magneto - rheological speed regulation control , and then proposes a fine - tuning current compensation mode to compensate the torque drop caused by temperature rise , and compares the control performance before and after the temperature compensation . In this paper , a novel high - power magneto - rheological transmission device is designed aiming at the requirement of high - power power transmission application . The magnetic field distribution rule and the distribution characteristics and influencing factors of magnetic induction intensity in the working gap are obtained by using ANSYS software . Based on the fluid computing control equation and the temperature field calculation equation , the mathematical model of the thermal flow coupling of the magneto - rheological transmission device is established , and the numerical simulation is carried out by using the CFD software CFX , so that the speed field , the pressure field and the transient temperature field of the cooling liquid in the transmission device under different conditions are obtained , and the influence of the slip power , the rotating speed , the water inlet speed and the temperature and the characteristics of the cooling liquid and the like on the heat flow coupling field of the magneto - rheological transmission device are analyzed . This paper designs and develops a high - power magneto - rheological transmission experimental system , carries out a lot of experimental research on the power transmission and response performance of the magneto - rheological transmission device under large slip power and the temperature rise characteristic of the magnetorheological fluid , and respectively tests the maximum allowable steady state and transient slip power of the transmission device , and verifies the reliability of the designed high - power magneto - rheological transmission device and the effectiveness of the water cooling heat dissipation method . The research results obtained in this paper have important guiding significance for further research on magneto - rheological transmission technology , which can provide technical support for the design of high - power magneto - rheological transmission device and the application and application of magneto - rheological transmission technology .

【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TH139

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本文編號：1370949