【摘要】：大量研究表明:合理的齒輪修形在一定程度上可以補(bǔ)償因輪齒受載產(chǎn)生的誤差,減小嚙合沖擊降低振動(dòng)噪聲,改善輪齒載荷分布,提高齒輪受載能力,提高齒輪運(yùn)行的平穩(wěn)性和可靠性。因此,在不改變齒輪基本參數(shù)的情況下,對(duì)斜齒輪進(jìn)行適當(dāng)修形是減少?zèng)_擊,降低振動(dòng)噪聲改善齒輪傳動(dòng)性能的良策。然而當(dāng)采取的齒輪修形方式、修形參數(shù)不合適時(shí),會(huì)使齒輪的傳動(dòng)性能惡化。本文以某型煤礦輸運(yùn)機(jī)減速器中的一對(duì)變位斜齒輪副為具體研究對(duì)象,應(yīng)用有限元思想,結(jié)合有限元接觸分析及動(dòng)態(tài)仿真,能夠直觀準(zhǔn)確地完成了齒輪修形方案的確定及試驗(yàn)驗(yàn)證。主要完成了以下工作:1根據(jù)斜齒輪的幾何尺寸計(jì)算公式,推導(dǎo)出其漸開線方程、螺旋線方程,并在三維繪圖軟件Pro/E中,使用更精確的輪齒建模方法—混合掃描法建立輪齒模型,進(jìn)而建立了精確的斜齒輪參數(shù)化三維模型。然后對(duì)斜齒輪副進(jìn)行虛擬無(wú)干涉裝配。2應(yīng)用有限元分析軟件ANSYS Workbench對(duì)斜齒輪進(jìn)行接觸分析。根據(jù)齒輪傳動(dòng)的嚙合特性與齒廓修形原理,結(jié)合有限元接觸分析結(jié)果得出輪齒彈性變形量以確定齒廓修形量,進(jìn)而根據(jù)實(shí)際工況確定合適的修形曲線及修形長(zhǎng)度。對(duì)常用的齒向修形方法進(jìn)行研究,結(jié)合本文的研究對(duì)象選擇了加工方法簡(jiǎn)單、且修形效果較好的鼓形修形。從加工成本、效果等方面綜合考慮僅對(duì)小齒輪進(jìn)行鼓形修形。3在動(dòng)態(tài)仿真軟件ADAMS中對(duì)修形前與修形后的斜齒輪副進(jìn)行動(dòng)態(tài)嚙合仿真,所得結(jié)果驗(yàn)證了本文的修形方案有效降低了齒輪嚙合過(guò)程中最大嚙合力,減小嚙合沖擊,使斜齒輪副的可靠性、平穩(wěn)性得到提高。4分析研究斜齒輪的修形加工方法,并推導(dǎo)出了相應(yīng)的加工參數(shù)關(guān)系式,對(duì)斜齒輪進(jìn)行修形加工。5搭建減速器振動(dòng)噪聲試驗(yàn)平臺(tái),對(duì)未修形、修形斜齒輪副進(jìn)行振動(dòng)噪聲試驗(yàn)。本文的振動(dòng)噪聲試驗(yàn)驗(yàn)證了結(jié)合齒輪的具體工況,應(yīng)用有限元法確定的齒輪修形,能夠有效地降低振動(dòng)噪聲,提高齒輪的動(dòng)態(tài)性能。
[Abstract]:A large number of studies show that reasonable gear modification can compensate the error caused by gear tooth load to a certain extent, reduce meshing impact, reduce vibration noise, improve gear tooth load distribution and increase gear load capacity. Improve the stability and reliability of gear operation. Therefore, without changing the basic parameters of the gear, the proper modification of the helical gear shape is a good way to reduce the impact and reduce the vibration noise to improve the transmission performance of the gear. However, the gear transmission performance will deteriorate when the modification parameters are not suitable. In this paper, a pair of modified helical gear pairs in the reducer of a coal mine conveyer is taken as the specific research object, and the finite element method is applied to the contact analysis and dynamic simulation. The gear modification scheme can be confirmed and verified directly and accurately. The following work has been accomplished: 1. According to the calculation formula of helical gear geometry dimension, the involute equation and helical equation are derived. In the 3D drawing software Pro/E, a more accurate modeling method of gear tooth, hybrid scanning method, is used to establish the gear tooth model. Furthermore, an accurate parameterized three-dimensional model of helical gear is established. Then virtual non-interference assembly of helical gear pair is carried out. 2. Contact analysis of helical gear is carried out by using finite element analysis software ANSYS Workbench. According to the meshing characteristic of gear transmission and the modification principle of tooth profile, the elastic deformation of gear tooth is obtained according to the results of finite element contact analysis, and the suitable modification curve and modification length are determined according to the actual working conditions. The common tooth modification method is studied, and the drum shape modification with simple processing method and better modification effect is selected in combination with the research object in this paper. From the aspects of machining cost and effect, only the drum shape modification of pinion gear is considered in the dynamic simulation software ADAMS, and the dynamic meshing simulation of the helical gear pair before and after modification is carried out. The results show that the proposed modification scheme can effectively reduce the maximum meshing force, reduce the meshing impact, improve the reliability and stability of the helical gear pair, and improve the reliability and smoothness of the helical gear pair. The corresponding formula of machining parameters is deduced, and the vibration and noise test platform of gear reducer is set up. The vibration and noise test of unmodified and modified helical gear pair is carried out. The vibration and noise test in this paper proves that the gear shape modification determined by finite element method can effectively reduce the vibration noise and improve the dynamic performance of the gear.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD50

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本文編號(hào)：2226668