發(fā)布時(shí)間：2018-02-14 02:03

  本文關(guān)鍵詞： 齒輪 接觸溫度 閃溫 熱變形 齒廓修形 Romax　出處：《煤炭學(xué)報(bào)》2017年06期 　論文類型：期刊論文

【摘要】：基于赫茲接觸理論建立齒輪嚙合力學(xué)模型,依據(jù)漸開線形成原理推導(dǎo)出滾動(dòng)距離和滾動(dòng)角變化規(guī)律,以牛頓冷卻定律和傅里葉定律為理論基礎(chǔ),結(jié)合采煤機(jī)搖臂工作特性,對(duì)齒輪系統(tǒng)對(duì)流換熱和摩擦熱流量進(jìn)行計(jì)算,在對(duì)流換熱系數(shù)確定中綜合考慮齒輪與潤(rùn)滑油,潤(rùn)滑油與箱體內(nèi)壁,箱體外壁與外界空氣的熱傳遞特性,以Blok理論為基礎(chǔ),本體溫度為初始溫度,分析了齒輪表面閃溫和接觸溫度隨滾動(dòng)距離及滾動(dòng)角變化規(guī)律。采用Romax Design建立了采煤機(jī)搖臂齒輪傳動(dòng)系統(tǒng)模型,對(duì)惰輪軸齒輪副進(jìn)行固熱耦合分析,基于Romax微觀幾何修形理論對(duì)漸開線齒廓進(jìn)行修形,分析了齒廓修形對(duì)溫度場(chǎng)影響。結(jié)果表明:齒廓修形消除了赫茲接觸應(yīng)力瞬增現(xiàn)象,最大接觸應(yīng)力減少72 MPa,修形后高溫區(qū)由齒頂和齒根向齒廓中部移動(dòng),改善了輪齒溫度分布,最高溫度降低31.4℃。為研究采煤機(jī)搖臂齒輪傳動(dòng)系統(tǒng)修形及優(yōu)化提供了理論基礎(chǔ)。
[Abstract]:Based on Hertz's contact theory, the gear meshing mechanics model is established, and the rolling distance and rolling angle change law is deduced according to the involute forming principle. Based on Newton's cooling law and Fourier's law, combined with the working characteristics of the shearer's rocker arm. In the calculation of convection heat transfer and friction heat flux of gear system, the heat transfer characteristics of gear and lubricating oil, lubricating oil and the inner wall of the box, the outer wall of the box and the outside air are considered synthetically in the determination of the convection heat transfer coefficient, which is based on the Blok theory. The change of surface flash temperature and contact temperature with rolling distance and rolling angle was analyzed. The driving system model of rocker arm gear of shearer was established by Romax Design, and the solid-heat coupling analysis was carried out on the gear pair of idler shaft. Based on Romax's microscopic geometric modification theory, the influence of tooth profile modification on temperature field is analyzed. The results show that tooth profile modification eliminates the transient increase of Hertz contact stress. The maximum contact stress is reduced by 72 MPa, and the high temperature region moves from the top of the tooth and the root of the tooth to the middle of the tooth profile after modification, which improves the temperature distribution of the gear teeth and reduces the maximum temperature by 31.4 鈩，

本文編號(hào)：1509623