本文選題：橋式起重機 + 永磁渦流制動��； 參考：《西南交通大學》2017年碩士論文

【摘要】：永磁渦流制動結構簡單,制動平穩(wěn)可靠,節(jié)能環(huán)保,是渦流制動的主要模式之一。由于永磁渦流制動感應渦流模型解析計算復雜,制動控制困難,是制約其進一步發(fā)展的主要原因。為將永磁渦流制動應用于起重機,實現(xiàn)起重機制動控制自動化,本文基于永磁電動懸浮電磁學理論,建立了直線型和旋轉(zhuǎn)型永磁渦流制動的三維解析計算數(shù)學模型,并基于該數(shù)學模型提出了一種新的永磁渦流制動實現(xiàn)模式。結合起重機機構結構特點及其制動需求,對起重機永磁渦流制動進行了方案設計和仿真分析,并對制動過程進行了動力學分析,設計了永磁渦流制動參數(shù),研究了起重機永磁渦流制動特性。本文主要研究內(nèi)容如下所示:(1)基于永磁電動懸浮電磁學理論,建立了直線型永磁渦流制動力和旋轉(zhuǎn)型永磁渦流制動力矩的三維解析計算數(shù)學模型。有限元分析結果表明,所建立的永磁渦流制動電磁力數(shù)學模型的解析計算結果與有限元計算結果的相對誤差皆在3%以內(nèi),具有很高的精度。(2)根據(jù)永磁渦流制動電磁力數(shù)學模型,提出了通過改變永磁陣列組的相對位移和相對轉(zhuǎn)角調(diào)節(jié)制動力和制動力矩的實現(xiàn)模型。通過仿真分析證明了該實現(xiàn)模型能實現(xiàn)較大范圍的制動力和制動力矩的調(diào)節(jié)。(3)結合橋式起重機QD10-13.5起重小車和大車運行機構的結構特點和制動需求對其進行了永磁渦流制動方案設計,并進行了磁場、電磁力和制動功率仿真分析�；谄鹬貦C防搖設計,建立了吊重二自由度擺角動力學模型,分析了小車運行機構按一元四次函數(shù)規(guī)律制動時的動力學特性,確定出了永磁渦流制動參數(shù)設計標準。(4)對起重機小車運行機構進行了永磁渦流制動參數(shù)設計,通過仿真分析證明了所選參數(shù)滿足永磁渦流制動參數(shù)設計標準。進行了小車運行機構制動過程動態(tài)制動特性分析,探究了擺長、制動時間、制動距離和制動初速度對永磁陣列組相對轉(zhuǎn)角、轉(zhuǎn)角速度以及制動功率的影響機理,證明了本文提出的實現(xiàn)模型的可行性和參數(shù)設計的合理性。綜上所述,本文對起重機機構永磁渦流制動進行了建模、方案設計、仿真分析與制動特性分析,其研究結果對起重機永磁渦流制動的設計具有參考價值,對實現(xiàn)起重機制動控制自動化具有重要意義。
[Abstract]:Permanent magnet eddy current braking is one of the main modes of eddy current braking with simple structure, stable and reliable braking, energy saving and environmental protection. The complex analytical calculation of permanent magnet eddy current braking induced eddy current model and the difficulty of braking control are the main reasons restricting its further development. In order to apply permanent magnet eddy current brake to crane and realize the automation of crane braking control, based on the theory of permanent magnet electric suspension electromagnetism, a three-dimensional analytical mathematical model of linear and rotating permanent magnet eddy current braking is established in this paper. Based on the mathematical model, a new permanent magnet eddy current braking model is proposed. Combined with the structure characteristics of crane mechanism and its braking requirements, the scheme design and simulation analysis of permanent magnet eddy current braking of crane are carried out, and the dynamic analysis of braking process is carried out, and the parameters of permanent magnet eddy current braking are designed. The characteristics of permanent magnet eddy current braking of crane are studied. The main contents of this paper are as follows: (1) based on the theory of permanent magnet electromagnetics, the mathematical models of linear permanent magnet eddy current braking force and rotating permanent magnet eddy current braking moment are established. The results of finite element analysis show that the relative error between the analytical and finite element calculation results of the established mathematical model of permanent magnet eddy current braking electromagnetic force is within 3%, and has a high precision. (2) according to the mathematical model of electromagnetic force of permanent magnet eddy current brake, The realization model of adjusting braking force and braking moment by changing relative displacement and relative rotation angle of permanent magnet array is proposed. The simulation results show that the model can achieve a wide range of braking force and brake torque regulation. 3) combined with the structural characteristics and braking requirements of the QD10-13.5 crane and the crane operation mechanism, the permanent magnet is carried out. Eddy current braking scheme design, The magnetic field, electromagnetic force and braking power are simulated and analyzed. Based on the anti-rocking design of crane, the dynamic model of two degrees of freedom swing angle of crane is established, and the dynamic characteristics of trolley operating mechanism when braking according to the law of quartic function are analyzed. The design standard of permanent magnet eddy current braking parameters is determined. (4) the design of permanent magnet eddy current braking parameters for crane trolley is carried out. The simulation results show that the selected parameters meet the design standard of permanent magnet eddy current braking parameters. In this paper, the dynamic braking characteristics of trolley operating mechanism are analyzed, and the influence mechanism of pendulum length, braking time, braking distance and braking initial velocity on relative rotation angle, angular velocity and braking power of permanent magnet array is discussed. The feasibility of the model and the rationality of parameter design are proved. To sum up, the permanent magnet eddy current brake of crane mechanism is modeled, scheme design, simulation analysis and braking characteristic analysis. The research results have reference value for the design of crane permanent magnet eddy current brake. It is of great significance to realize the automation of crane braking control.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH21

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