四點接觸球轉(zhuǎn)盤軸承壽命影響因素的分析與研究
發(fā)布時間：2018-08-02 13:06
【摘要】：四點接觸球轉(zhuǎn)盤軸承在風力發(fā)電機領域、重型機械領域、大型醫(yī)療精密機械領域以及軍工領域均有涉及應用，并作為其主要零部件對保證整機設備的質(zhì)量以及使用壽命有著重要作用。由于常用的四點接觸球轉(zhuǎn)盤軸承不同于普通軸承，具有結(jié)構尺寸大、承載高以及工作環(huán)境惡劣等特點，加之引進國內(nèi)時間較短，技術不夠成熟，導致了目前國內(nèi)生產(chǎn)的四點接觸球轉(zhuǎn)盤軸承壽命大多只有2-3年，不能滿足客戶要求。因此有必要對四點接觸球轉(zhuǎn)盤軸承的壽命影響因素進行分析研究。本文結(jié)合目前國內(nèi)外對四點接觸球轉(zhuǎn)盤軸承的研究現(xiàn)狀，從三方面對其壽命影響因素進行分析。具體內(nèi)容如下： 針對四點接觸球轉(zhuǎn)盤軸承許用接觸應力進行分析研究。首先通過材料熱處理工藝參數(shù)的調(diào)整試驗，分析其滾道淬硬層深度與熱處理工藝參數(shù)之間的關系，然后通過壓痕試驗分析許用接觸應力與淬硬層深度、表面硬度以及溝曲率系數(shù)之間的關系，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力對應的淬硬層深度、表面硬度以及溝曲率系數(shù)。在此基礎上，采用有限元方法進一步對四點接觸球轉(zhuǎn)盤軸承靜力學承載性能進行了分析，為四點接觸球轉(zhuǎn)盤軸承的設計提供了一定的參考價值。 針對四點接觸球轉(zhuǎn)盤軸承摩擦力矩進行分析研究。首先對比了不同經(jīng)驗公式的計算結(jié)果，然后基于目前四點接觸球轉(zhuǎn)盤軸承摩擦力矩的主要影響因素，通過試驗方式分別找出其與載荷以及游隙之間的關系，并進一步采用有限元方法對其進行了分析計算，最后通過對比分析建立了摩擦力矩與載荷以及負游隙絕對值之間的函數(shù)關系式，為四點接觸球轉(zhuǎn)盤軸承的裝配合套率提供了依據(jù)。 針對四點接觸球轉(zhuǎn)盤軸承螺栓連接性能進行分析研究。采用正交設計方法分析了三個主要的影響因素：預緊力、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.
【學位授予單位】：河南科技大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH133.3
[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.
【學位授予單位】：河南科技大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH133.3
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