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  本文關(guān)鍵詞：重型板式給料機(jī)鏈傳動系統(tǒng)靜動態(tài)特性研究　出處：《大連理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鏈傳動系統(tǒng) 沖擊載荷 鏈條拉力 多體動力仿真 嚙合受力模型

【摘要】：板式給料機(jī)是自移式破碎站的核心組成部件之一,它靠鏈傳動驅(qū)動,鏈傳動系統(tǒng)性能好壞對給料機(jī)能否平穩(wěn)安全運(yùn)行至關(guān)重要。由于承受重量可觀的物料自重,以及受到電鏟落料的沖擊作用,板式給料機(jī)實(shí)際工作過程中振動較嚴(yán)重,同時鏈節(jié)鏈輪容易破壞。如何評價物料沖擊對輸送鏈的影響,研究給料機(jī)產(chǎn)生振動的來源,以及探討給料機(jī)鏈傳動系統(tǒng)的動態(tài)特性,已經(jīng)成為現(xiàn)在大型破碎站自主設(shè)計過程中迫切需要解決的問題。 針對板式給料機(jī)振動問題,文章從給料機(jī)輸送鏈基本結(jié)構(gòu)特點(diǎn)出發(fā),將鏈傳動系統(tǒng)等效為五桿機(jī)構(gòu)模型,推導(dǎo)了輸送物料方向速度波動公式,結(jié)果表明鏈輪齒數(shù)、節(jié)距對速度波動影響最大,為后續(xù)動力學(xué)仿真提供理論依據(jù)。 鏈條載荷分析是進(jìn)行后續(xù)分析的基礎(chǔ),本文探討了平穩(wěn)運(yùn)輸物料和受到物料沖擊載荷兩種工況下鏈條拉力的計算方法,分析顯示沖擊載荷造成鏈條拉力顯著增加。針對輸送鏈?zhǔn)芰l件惡劣的驅(qū)動輪嚙合區(qū)域,建立了剛體受力模型和考慮鏈節(jié)伸長量、齒廓間隙、初始壓力角等多因素的受力模型,求解了鏈節(jié)之間以及鏈輪鏈條的相互作用力,比較了摩擦角等因素對鏈輪載荷分布的影響,得出摩擦角與鏈節(jié)伸長量的存在,導(dǎo)致滾子與鏈輪作用力方向以及大小相應(yīng)改變的結(jié)論。 通過剛?cè)峄旌隙囿w動力學(xué)技術(shù),驗(yàn)證了速度波動公式的正確性,仿真求解了給料機(jī)鏈傳動系統(tǒng)動態(tài)響應(yīng)情況以及滾子銷軸動態(tài)應(yīng)力與應(yīng)變,分析比較了理論受力模型、剛體模型、柔性體模型在計算嚙合區(qū)域載荷上的異同,為實(shí)際給料機(jī)鏈傳動機(jī)構(gòu)設(shè)計提供理論參考。
[Abstract]:Since the plate feeder shiftcrusher station core components of it by chain drive, chain drive system performance of feeder can smooth and safe operation is very important. Because of the considerable weight to withstand the weight of materials, and by the impact of falling shovel material, plate feeder in actual work process of vibration is serious, and the chain sprocket easy to destroy. How to evaluate the material impact on the effect of the conveyor chain, on feeder vibration source, and the dynamic characteristics of feeder chain drive system, has now become an urgent need to solve the large-scale crushing station independently in the process of design.
Aiming at the vibration problem of plate feeder, the feeder conveyor chain the basic structure of the equivalent transmission chain five bar mechanism model, deduces the conveying direction of the speed fluctuation formula. The results show that the number of teeth, the pitch of the greatest impact on the speed fluctuation for the subsequent dynamic simulation provides a theoretical basis.
The chain load analysis is the basis for the subsequent analysis, this paper discusses the smooth transportation of materials and materials under impact load under two conditions of chain tension calculation method, analysis shows that the impact load caused by the force of chain increased significantly. The driving wheel meshing area conveying chain force in severe conditions, establish the rigid force model and considering the chain elongation the amount of stress, tooth gap, multi factor model of initial pressure angle, the link between the solution and the sprocket chain interaction, comparison of friction angle and other factors on the effect of wheel load distribution, the friction angle and chain elongation, resulting in roller and sprocket force direction and change the size of the corresponding conclusion.
The rigid flexible multi-body dynamics technique, to verify the correctness of the velocity fluctuation formula, simulation for feeder chain drive system dynamic response and roller pin dynamic stress and strain analysis, comparing the theoretical stress model, rigid model, flexible model in the calculation of load on the similarities and differences between the meshing area, and provide a theoretical reference for the actual design of feeder chain drive mechanism.

【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH237.1

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本文編號：1436438