Experimental research on the surface strengthening technology of roller cone bit bearing based on the failure analysis

Huang, Zhiqiang; Qin, Li; Zhou, Yi; Jing, Shuang; Ma, Yachao; Hu, Wengang; Fan, Yihang

doi:10.1016/j.engfailanal.2012.08.018

Cited by 31 publications

(21 citation statements)

References 6 publications

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“…The establishment of model materials includes the metal material property definition of shaft diameter and roller bearing, together with the material property definition of bionic non-smooth sealing ring, as shown in Table 3. 3,21 The 9CrW18Mn metal material is adopted, which is the isotropic elastomeric material of linear elastic materials. The material property of bionic non-smooth sealing rings is directly defined as the material of O-shaped sealing rings, which is the NBR.…”

Section: Definition Of the Property Of Materialsmentioning

confidence: 99%

Evaluation of sealing performance of bearing rings of roller-cone bits based on grid-shaped bionic non-smooth surface

Zeng

Zhou

2018

Advances in Mechanical Engineering

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Based on the bionic non-smooth surface theory, this article carries out (1) design of the structure of bionic non-smooth sealing rings and toothed bars of the sealing structure and (2) finite element simulation study on the bionic non-smooth surface structure of roller-cone bits. The result shows that (1) when the parameter Y is equal to the rack angles, the maximum pressure of the Type B is smaller than that of the Type A, while the equivalent stress of the Type A is smaller than that of the Type B; when the parameter Y is equal to the tooth distribution, the maximum pressure and the equivalent stress of the rack angle of 30°are smaller than that of the rack angle of 20°; and when the rack angle is equal to the tooth distribution, the maximum contact pressure and the equivalent stress of the tooth decrease with the increase in the parameter Y.(2) Compared with the O-shaped sealing rings, the new tooth bars avoid the problem of over-large contact area. (3) The grid-shaped sealing structure can increase the wear resistance of rubber rings and delay their wear and aging, thus improving their service life.

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Section: Definition Of the Property Of Materialsmentioning

confidence: 99%

Evaluation of sealing performance of bearing rings of roller-cone bits based on grid-shaped bionic non-smooth surface

Zeng

Zhou

2018

Advances in Mechanical Engineering

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show abstract

“…It can be seen that the F values of factors C, E, and F are lower than F 0.05 (2,8), which means that these factors have little or no effect on P and Q, and the other eight factors need to be further discussed. ***** **** * ***** --***** -**** -*****…”

Section: F-testmentioning

confidence: 99%

“…For the factors, the larger the F values is, the greater the impact on the optimization objective is. If F i ＞F 0.001 (2,8), the factor i is highly significant, marked as"*****". If F 0.001 (2,8)＞F i ＞F 0.005 (2,8).…”

Section: F-testmentioning

confidence: 99%

“…With the F value increasing from 0.005 to 0.05, the impact on the maximum contact pressure and leakage rate reduces gradually. If F 0.05 (2,8)＞F i , the influence of the factors can be neglected.…”

Section: F-testmentioning

confidence: 99%

“…Harsh marine environment brings many problems to drilling, one of the most significant questions which must be answered by the drilling engineers is whether the reliability of three-cone bit can be guaranteed [1]. However, statistics indicated that the main reason for the bit failure is the early seal failure [2]. Compared to a common seal, the bit seal has more complicated structure, and the high temperature and high pressure of well bottom-hole will lead to the lubricant leakage increases.…”

Section: Introductionmentioning

confidence: 99%

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