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1.郑州机械研究所有限公司, 河南 郑州 450001
2.郑机所(郑州)传动科技有限公司, 河南 郑州 450001
3.长江三峡通航管理局, 湖北 宜昌 443000
陈卓(1999— ),女,河南平顶山人,硕士研究生;研究方向为齿轮强度与试验技术;1102993116@qq.com。
刘忠明(1964— ),男,河南浚县人,博士,研究员,博士研究生导师;研究方向为齿轮传动数字化设计方法和装备可靠性分析;Zmliu2001@126.com。
纸质出版日期:2023-05-15,
收稿日期:2023-02-22,
移动端阅览
陈卓,师陆冰,阎晓青等.基于载荷谱的三峡升船机齿条疲劳寿命评估[J].机械传动,2023,47(05):158-166.
Chen Zhuo,Shi Lubing,Yan Xiaoqing,et al.Fatigue Life Evaluation of Racks for the Three Gorges Ship Lift Based on the Load Spectrum[J].Journal of Mechanical Transmission,2023,47(05):158-166.
陈卓,师陆冰,阎晓青等.基于载荷谱的三峡升船机齿条疲劳寿命评估[J].机械传动,2023,47(05):158-166. DOI: 10.16578/j.issn.1004.2539.2023.05.024.
Chen Zhuo,Shi Lubing,Yan Xiaoqing,et al.Fatigue Life Evaluation of Racks for the Three Gorges Ship Lift Based on the Load Spectrum[J].Journal of Mechanical Transmission,2023,47(05):158-166. DOI: 10.16578/j.issn.1004.2539.2023.05.024.
针对三峡升船机齿轮齿条在全寿命周期内可能面临疲劳失效的问题,基于驱动电动机以及同步轴转矩计算出的齿轮齿条载荷,构建了包含受力齿面、载荷循环次数的齿条载荷谱;结合齿条的
S-N
曲线、Miner线性累积损伤准则,计算了齿条在设计寿命35年内的损伤度及剩余疲劳寿命。此外,采用累积迭代法计算了齿条的接触、弯曲安全系数,实现了齿条实际载荷与设计载荷下安全系数的相互对比与运行安全性能验证。研究表明,齿条上齿面的啮合次数较多,其概率为73.03%;在设计寿命内,齿条上齿面的接触疲劳总损伤度为1.65×10
-12
,按载荷谱的总循环次数为1.87×10
17
;齿条上齿面的弯曲疲劳总损伤度为8.15×10
-14
,按载荷谱的总循环次数为3.78×10
18
,齿条在设计寿命35年后具有很长的剩余疲劳寿命;齿条的接触安全系数
S
H
=2.958,弯曲安全系数
S
F
=8.106,均大于所选取的较高可靠度下的最小安全系数与设计载荷下的计算安全系数,升船机齿条的安全裕量充足。研究丰富了超大模数齿轮齿条疲劳寿命领域的相关研究,为三峡升船机的运行维护提供了理论基础和数据支撑。
Aiming at the problem that the rack and pinion for the Three Gorges ship lift may face fatigue failure during its whole life cycle
the load spectrum including the stressed tooth surface and the number of load cycles is constructed in this study based on the rack and pinion load calculated by the torques of the driving motors and the synchronous shafts. Combined with the
S-N
curve of racks and Miner's linear cumulative damage criterion
the damage degree and residual fatigue life of racks within 35 years of design life are calculated. In addition
the cumulative iteration method is used to calculate the contact and bending safety factors of the rack
which realizes the comparison between the actual load and the design load of the rack and the operation safety performance verification. The results show that
the upper tooth surface of the rack has more meshing times
and its probability is 73.03%. During the design life
the total contact fatigue damage degree of the upper tooth surface of the rack is 1.65×10
-12
and the total number of cycles according to the load spectrum is 1.87×10
17
. The total damage degree of the bending fatigue of the upper tooth surface of the rack is 8.15×10
-14
; the total number of cycles according to the load spectrum is 3.78×10
18
; the rack has a long residual fatigue life after 35 years of design life. The contact safety factor of the racks
S
H
=2.958
bending safety factor
S
F
=8.106
are both greater than the selected minimum safety factor under high reliability and the calculated safety factor under design load
and the safety margin of ship lift racks is sufficient. The research content of this study has enriched the relevant research in the field of fatigue life of super-large modulus racks and pinions
and provides theoretical basis and data support for the operation and maintenance of the Three Gorges ship lift.
三峡升船机齿轮齿条载荷谱疲劳寿命安全系数
Three gorges ship liftRack and pinionLoad spectrumFatigue lifeSafety factor
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