本文選題：節(jié)點(diǎn)外嚙合　切入點(diǎn)：滑動(dòng)系數(shù)　出處：《南京航空航天大學(xué)》2012年碩士論文

【摘要】：節(jié)點(diǎn)外嚙合齒輪嚙合時(shí),實(shí)際嚙合線不經(jīng)過節(jié)點(diǎn),這樣在節(jié)點(diǎn)處摩擦力方向不發(fā)生改變,降低了傳動(dòng)時(shí)的振動(dòng)和噪聲。當(dāng)齒輪外嚙合時(shí)采用節(jié)點(diǎn)后嚙合形式,內(nèi)嚙合時(shí)采用節(jié)點(diǎn)前嚙合形式可以提高齒輪的承載能力及潤滑效果。因此,開展對節(jié)點(diǎn)外嚙合齒輪傳動(dòng)設(shè)計(jì)及動(dòng)力學(xué)研究的工作具有重要的工程意義。 研究了節(jié)點(diǎn)外嚙合齒輪的各參數(shù)間所必須滿足的關(guān)系,通過改變變位系數(shù),減小齒頂高系數(shù)等方法獲得節(jié)點(diǎn)外嚙合齒輪副。對影響節(jié)點(diǎn)外嚙合程度的各項(xiàng)參數(shù)進(jìn)行了分析,完成了節(jié)點(diǎn)外嚙合齒輪副的參數(shù)設(shè)計(jì)。 針對節(jié)點(diǎn)外嚙合的嚙合特點(diǎn),研究了外嚙合與內(nèi)嚙合齒輪齒廓上綜合曲率半徑的變化規(guī)律,對傳統(tǒng)的接觸應(yīng)力計(jì)算方法進(jìn)行了改進(jìn),實(shí)現(xiàn)了節(jié)點(diǎn)外嚙合齒輪的接觸應(yīng)力計(jì)算；求解了節(jié)點(diǎn)外嚙合齒輪傳動(dòng)與普通齒輪傳動(dòng)的接觸應(yīng)力,計(jì)算結(jié)果表明,外嚙合齒輪傳動(dòng)采用節(jié)點(diǎn)后嚙合,內(nèi)嚙合齒輪采用節(jié)點(diǎn)前嚙合可以提高齒輪傳動(dòng)的接觸強(qiáng)度。 推導(dǎo)了外嚙合與內(nèi)嚙合齒輪滑動(dòng)系數(shù)的計(jì)算公式；分析了節(jié)點(diǎn)外嚙合齒輪傳動(dòng)齒廓上摩擦力對磨損、振動(dòng)、齒面應(yīng)力和潤滑的影響。 以單對節(jié)點(diǎn)外嚙合齒輪為研究對象,采用集中質(zhì)量方法,建立了節(jié)點(diǎn)外嚙合齒輪副動(dòng)力學(xué)模型,在動(dòng)力學(xué)微分方程中考慮了齒面摩擦,時(shí)變剛度、傳遞嚙合誤差和間隙的影響。推導(dǎo)了系統(tǒng)的無量綱化微分方程組,采用數(shù)值積分法求解方程組,得到了齒輪副的動(dòng)態(tài)響應(yīng)。對比節(jié)點(diǎn)外嚙合齒輪與普通齒輪傳動(dòng)系統(tǒng)的動(dòng)載特性可得,節(jié)點(diǎn)外嚙合齒輪傳動(dòng)系統(tǒng)在嚙合線及x軸上的振動(dòng)均小于普通齒輪傳動(dòng)系統(tǒng)。運(yùn)用有限元法計(jì)算了齒輪副的固有頻率和振型,計(jì)算結(jié)果表面,節(jié)點(diǎn)外嚙合齒輪傳動(dòng)系統(tǒng)的固有頻率高于普通齒輪傳動(dòng)系統(tǒng)。
[Abstract]:The node external gear meshing, the actual meshing line does not pass through the node, this does not change at a node in the direction of friction, reducing vibration and noise transmission. When the gear meshed with nodes meshing form, inner meshed by the node before the mesh form can improve the bearing capacity of the gear and lubrication effect. Therefore that has important practical significance to carry out the design and dynamic analysis of the node external gear transmission.
Study on the relationship between the parameters of the node external gear between which must be fulfilled, by changing the displacement coefficient, reduce tooth addendum coefficient and other methods to get the node external gear pair. The influence of various parameters of node external gearing degree are analyzed, designed node external gear pair.
According to the meshing characteristics of node external gearing, studied comprehensive curvature radius of external and internal gear pair meshing gear tooth profile, the contact stress on the traditional calculation method is improved, the node external gear contact stress calculation; solving the node external gear wheel transmission and gear contact stress, the calculation results show that the external gear drive with internal gear meshing nodes, the nodes can improve the contact strength of the meshing gear.
The formula for calculating the sliding coefficient of external meshing and internal meshing gears is derived, and the influence of frictional force on the wear, vibration, tooth surface stress and lubrication is analyzed.
In order to node external gear as the research object, using the lumped mass method, a node external gear pair in the dynamic model, dynamic differential equations considering the tooth friction, time-varying stiffness, transmission error and backlash meshing. The dimensionless differential equations are deduced by numerical system. Integral method for solving equations, the dynamic response of the gear pair. Comparing the node external gear and common gear transmission system dynamic load characteristics, the vibration in the meshing line and X axis node external gearing system was less than the ordinary gear transmission system. Gear natural frequency and vibration mode are calculated by using the finite element method, the calculation results of the surface, the natural frequency of node external gearing system is higher than that of common gear transmission system.

【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH132.41

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