本文關(guān)鍵詞：帶式輸送機(jī)側(cè)向動(dòng)力學(xué)研究　出處：《遼寧工程技術(shù)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： 帶式輸送機(jī) 側(cè)向動(dòng)力特性 側(cè)向運(yùn)動(dòng)動(dòng)力模型 仿真 跑偏控制

【摘要】：帶式輸送機(jī)在散料輸送中起著重要作用,帶式輸送機(jī)的側(cè)向動(dòng)力學(xué)影響著帶式輸送機(jī)的穩(wěn)定運(yùn)行,從激勵(lì)源入手對(duì)帶式輸送機(jī)側(cè)向動(dòng)力學(xué)進(jìn)行了全面研究.(1)系統(tǒng)分析帶式輸送機(jī)產(chǎn)生側(cè)向跑偏的激勵(lì)源.對(duì)由膠帶本身的質(zhì)量問題、膠帶接頭不對(duì)中、溫度場(chǎng)分布不均衡等因素產(chǎn)生的激勵(lì)進(jìn)行分析,得到膠帶本身結(jié)構(gòu)特性產(chǎn)生的激勵(lì)源的分布規(guī)律.對(duì)由回轉(zhuǎn)托輥?zhàn)笥疫\(yùn)轉(zhuǎn)不平衡、托輥存在傾角、軸線與膠帶中心線不垂直、托輥架傾斜等原因產(chǎn)生的側(cè)向激勵(lì)進(jìn)行深入研究,分析了托輥產(chǎn)生激勵(lì)源的作用機(jī)理和特點(diǎn).分析了機(jī)架的直線度和水平度不夠產(chǎn)生的側(cè)向激勵(lì),研究了其作用機(jī)理.研究了物料偏載、滾筒直徑兩端不一致、滾筒軸線與輸送機(jī)軸線不垂直等情形產(chǎn)生的側(cè)向激勵(lì)的作用規(guī)律.(2)研究了帶式輸送機(jī)防止側(cè)向跑偏的向心力源的作用機(jī)理.從理論上分析了托輥前傾、錐形調(diào)心托輥、立輥式自動(dòng)調(diào)心托輥、曲線回轉(zhuǎn)體側(cè)托輥型調(diào)心托輥、懸掛式調(diào)心托輥、吊掛串形調(diào)心托輥組等調(diào)心原理；研究了其產(chǎn)生使膠帶回中的恢復(fù)力的作用機(jī)理.分析了膠帶和物料自身的恢復(fù)力產(chǎn)生機(jī)理,確定了其對(duì)側(cè)向運(yùn)動(dòng)的作用規(guī)律.研究表明膠帶的側(cè)向運(yùn)行由使膠帶跑偏的激勵(lì)和防止跑偏的向心力共同作用產(chǎn)生的.(3)綜合考慮各種側(cè)向激勵(lì)源作用,構(gòu)造了膠帶側(cè)向運(yùn)動(dòng)的非線性動(dòng)力學(xué)連續(xù)模型,推導(dǎo)了膠帶側(cè)向動(dòng)力學(xué)方程,并確定了邊界條件；根據(jù)實(shí)際情況簡(jiǎn)化模型,給出了解析解,進(jìn)行了模態(tài)分析,確定了膠帶側(cè)向抗彎剛度、膠帶的初張力、復(fù)位力是影響帶式輸送機(jī)側(cè)向穩(wěn)定運(yùn)行的關(guān)鍵因素.(4)構(gòu)造了膠帶側(cè)向運(yùn)動(dòng)有限元離散單元模型,根據(jù)具體工況條件,確定了邊界條件并推導(dǎo)了帶式輸送機(jī)側(cè)向運(yùn)動(dòng)的狀態(tài)方程.根據(jù)工況條件對(duì)帶式輸送機(jī)側(cè)向動(dòng)力學(xué)特性進(jìn)行仿真,揭示了膠帶的側(cè)向運(yùn)動(dòng)特征和規(guī)律,為膠帶的跑偏防治提供了理論基礎(chǔ).(5)建立了調(diào)心托輥的動(dòng)力模型,分析了立輥式調(diào)心托輥和曲線回轉(zhuǎn)體托輥的調(diào)偏性能,揭示其調(diào)偏的滯后特性；提出了穩(wěn)定型調(diào)心托輥的調(diào)心力與轉(zhuǎn)角的關(guān)系.設(shè)計(jì)了液壓(氣動(dòng))伺服自動(dòng)調(diào)偏裝置,并對(duì)該裝置進(jìn)行控制系統(tǒng)建模仿真分析了其調(diào)偏的穩(wěn)定性,通過實(shí)例進(jìn)行了液壓(氣動(dòng))伺服自動(dòng)調(diào)偏裝置調(diào)偏性能與立輥式調(diào)心托輥進(jìn)行了對(duì)比仿真研究,結(jié)果表明該調(diào)偏裝置調(diào)偏性能明顯優(yōu)于立輥式調(diào)心托輥,避免了調(diào)偏的滯后性.(6)利用大型工礦裝備研究中心的帶式輸送機(jī)設(shè)計(jì)了實(shí)驗(yàn)臺(tái)和實(shí)驗(yàn)系統(tǒng),并完成了膠帶跑偏測(cè)試,測(cè)試結(jié)果具有與仿真結(jié)果一致性的規(guī)律,驗(yàn)證了理論模型的正確性；證明了液壓伺服自動(dòng)調(diào)偏裝置調(diào)偏性能對(duì)比立輥式調(diào)心托輥的優(yōu)越性.
[Abstract]:Belt conveyor plays an important role in bulk conveying. The lateral dynamics of belt conveyor affects the stable operation of belt conveyor. The lateral dynamics of belt conveyor is studied comprehensively from the source of excitation. (1) the driving source of lateral running deviation of belt conveyor is analyzed systematically. The belt joint is out of alignment due to the quality problem of belt itself. Based on the analysis of the excitation caused by the unbalanced distribution of the temperature field, the distribution law of the excitation source produced by the structural characteristics of the belt itself is obtained. The axial line is not perpendicular to the belt centerline, and the lateral excitation caused by the tilting of the roller frame is deeply studied. This paper analyzes the mechanism and characteristics of the excitation source produced by the roller, analyzes the lateral excitation caused by the lack of straightness and flatness of the rack, studies its action mechanism, and studies the bias load of the material and the inconsistency between the two ends of the roller diameter. The action law of lateral excitation caused by drum axis and conveyor axis is not perpendicular. (2) the action mechanism of the concentric force source of belt conveyor to prevent lateral running deviation is studied, and the forward tilting of the roller is analyzed theoretically. Taper center adjusting roller, vertical roller type automatic center adjusting roller, curve revolving body side roller type center adjusting roller, hanging type center adjusting roller, hanging string center adjusting roller group, etc. In this paper, the mechanism of the recovery force in the tape return is studied, and the mechanism of the recovery force of the tape and the material itself is analyzed. The study shows that the lateral movement of the belt is caused by the combined action of the driving force and the centripetal force to prevent the running deviation of the belt. (3) all kinds of lateral excitation sources are considered synthetically. The nonlinear dynamic continuous model of belt lateral motion is constructed, the lateral dynamic equation of belt is derived, and the boundary conditions are determined. According to the simplified model, the analytical solution is given, the modal analysis is carried out, and the lateral bending stiffness and the initial tension of the tape are determined. The reposition force is the key factor affecting the lateral stability of belt conveyors. The finite element discrete element model of belt lateral motion is constructed according to the specific working conditions. The boundary conditions are determined and the state equation of lateral motion of belt conveyor is deduced. According to the working conditions, the lateral dynamic characteristics of belt conveyor are simulated, and the characteristics and laws of lateral motion of belt conveyor are revealed. This paper provides a theoretical basis for the prevention and cure of belt deviation. (5) the dynamic model of the center adjusting roller is established, the performance of the vertical roller adjusting roller and the curve rotary body roller is analyzed, and the hysteresis characteristic of the adjustment is revealed. The relationship between the centering force and the rotation angle of the stable center-adjusting idler is put forward. The hydraulic (pneumatic) servo automatic deflecting device is designed, and the stability of the device is analyzed by modeling and simulation of the control system. The performance of the hydraulic (pneumatic) servo automatic bias adjusting device is compared with that of the vertical roller center adjusting roller through an example. The results show that the bias adjustment performance of the device is obviously superior to that of the vertical roller center adjusting roller. The belt conveyor of the large industrial equipment research center is used to design the experimental platform and the experimental system, and the belt deviation test is completed. The test results are consistent with the simulation results, and the correctness of the theoretical model is verified. It is proved that the performance of hydraulic servo automatic bias adjusting device is better than that of vertical roller center adjusting roller.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TH222

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