發(fā)布時間：2018-08-02 13:06

【摘要】：四點(diǎn)接觸球轉(zhuǎn)盤軸承在風(fēng)力發(fā)電機(jī)領(lǐng)域、重型機(jī)械領(lǐng)域、大型醫(yī)療精密機(jī)械領(lǐng)域以及軍工領(lǐng)域均有涉及應(yīng)用，并作為其主要零部件對保證整機(jī)設(shè)備的質(zhì)量以及使用壽命有著重要作用。由于常用的四點(diǎn)接觸球轉(zhuǎn)盤軸承不同于普通軸承，具有結(jié)構(gòu)尺寸大、承載高以及工作環(huán)境惡劣等特點(diǎn)，加之引進(jìn)國內(nèi)時間較短，技術(shù)不夠成熟，導(dǎo)致了目前國內(nèi)生產(chǎn)的四點(diǎn)接觸球轉(zhuǎn)盤軸承壽命大多只有2-3年，不能滿足客戶要求。因此有必要對四點(diǎn)接觸球轉(zhuǎn)盤軸承的壽命影響因素進(jìn)行分析研究。本文結(jié)合目前國內(nèi)外對四點(diǎn)接觸球轉(zhuǎn)盤軸承的研究現(xiàn)狀，從三方面對其壽命影響因素進(jìn)行分析。具體內(nèi)容如下： 針對四點(diǎn)接觸球轉(zhuǎn)盤軸承許用接觸應(yīng)力進(jìn)行分析研究。首先通過材料熱處理工藝參數(shù)的調(diào)整試驗(yàn)，分析其滾道淬硬層深度與熱處理工藝參數(shù)之間的關(guān)系，然后通過壓痕試驗(yàn)分析許用接觸應(yīng)力與淬硬層深度、表面硬度以及溝曲率系數(shù)之間的關(guān)系，最終找出獲得較好淬硬層深度的熱處理工藝以及取得較大許用接觸應(yīng)力對應(yīng)的淬硬層深度、表面硬度以及溝曲率系數(shù)。在此基礎(chǔ)上，采用有限元方法進(jìn)一步對四點(diǎn)接觸球轉(zhuǎn)盤軸承靜力學(xué)承載性能進(jìn)行了分析，為四點(diǎn)接觸球轉(zhuǎn)盤軸承的設(shè)計提供了一定的參考價值。 針對四點(diǎn)接觸球轉(zhuǎn)盤軸承摩擦力矩進(jìn)行分析研究。首先對比了不同經(jīng)驗(yàn)公式的計算結(jié)果，然后基于目前四點(diǎn)接觸球轉(zhuǎn)盤軸承摩擦力矩的主要影響因素，通過試驗(yàn)方式分別找出其與載荷以及游隙之間的關(guān)系，并進(jìn)一步采用有限元方法對其進(jìn)行了分析計算，最后通過對比分析建立了摩擦力矩與載荷以及負(fù)游隙絕對值之間的函數(shù)關(guān)系式，為四點(diǎn)接觸球轉(zhuǎn)盤軸承的裝配合套率提供了依據(jù)。 針對四點(diǎn)接觸球轉(zhuǎn)盤軸承螺栓連接性能進(jìn)行分析研究。采用正交設(shè)計方法分析了三個主要的影響因素：預(yù)緊力、墊塊高度以及螺栓與支座接觸面的摩擦系數(shù)。并找出了對螺栓連接性能的影響主次順序以及三個因素的最優(yōu)組合，，對四點(diǎn)接觸球轉(zhuǎn)盤軸承的螺栓連接性能的提高具有一定的幫助。
[Abstract]:The four-point contact ball turntable bearings have been applied in the fields of wind turbine, heavy machinery, large medical precision machinery and military industry. As its main parts, it plays an important role in ensuring the quality and service life of the whole equipment. The commonly used four-point contact ball turntable bearings are different from ordinary bearings and have the characteristics of large structure size, high bearing capacity and bad working environment. In addition, the imported domestic time is relatively short, and the technology is not mature enough. As a result, most of the four-point contact ball bearings produced in China have a life of only 2-3 years, which can not meet the requirements of customers. Therefore, it is necessary to analyze and study the factors affecting the life of four-point contact ball turntable bearings. In this paper, the factors affecting the life of four point contact ball bearings are analyzed from three aspects combined with the current research situation at home and abroad. The main contents are as follows: the allowable contact stress of four-point contact ball turntable bearings is studied. The relationship between the hardened layer depth of the raceway and the heat treatment process parameters is analyzed by adjusting the technological parameters of the material heat treatment, and then the allowable contact stress and the depth of the hardened layer are analyzed by indentation test. The relationship between surface hardness and groove curvature coefficient, the heat treatment process to obtain better hardened layer depth, and the depth of hardened layer, surface hardness and groove curvature coefficient corresponding to larger allowable contact stress were found out. On this basis, the static load bearing performance of four-point contact ball turntable bearing is further analyzed by using finite element method, which provides a certain reference value for the design of four-point contact ball rotary disc bearing. The friction moment of four-point contact ball turntable bearing is analyzed and studied. The calculation results of different empirical formulas are compared at first. Based on the main influencing factors of friction torque of four-point contact ball disc bearing, the relationship between the friction moment and load and clearance is found out by means of test. Furthermore, the finite element method is used to analyze and calculate it. Finally, the functional relationship between friction moment, load and negative clearance absolute value is established through comparative analysis. It provides the basis for the fitting rate of four-point contact ball turntable bearing. The bolt connection performance of four-point contact ball turntable bearing is analyzed and studied. The orthogonal design method is used to analyze the three main factors: pretightening force, the height of the pad and the friction coefficient of the bolt-bearing interface. The optimal combination of the three factors is found out, which is helpful to the improvement of bolt connection performance of four-point contact ball turntable bearing.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH133.3

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本文編號：2159531