Testing of Influence of Start-Stop on the Reliability and Drag Torque of the Thrust Bearing

Zhang Jianxin; Zhang Donghui; Gu Jipin; Guo Xiaoxian; Chen Shuming; Liu Xiaojun

doi:10.13832/j.jnpe.2022.03.0173

Volume 43 Issue 3

Jun. 2022

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Zhang Jianxin, Zhang Donghui, Gu Jipin, Guo Xiaoxian, Chen Shuming, Liu Xiaojun. Testing of Influence of Start-Stop on the Reliability and Drag Torque of the Thrust Bearing[J]. Nuclear Power Engineering, 2022, 43(3): 173-178. doi: 10.13832/j.jnpe.2022.03.0173

Citation:

Zhang Jianxin, Zhang Donghui, Gu Jipin, Guo Xiaoxian, Chen Shuming, Liu Xiaojun. Testing of Influence of Start-Stop on the Reliability and Drag Torque of the Thrust Bearing[J]. Nuclear Power Engineering, 2022, 43(3): 173-178. doi: 10.13832/j.jnpe.2022.03.0173

Citation:

Zhang Jianxin, Zhang Donghui, Gu Jipin, Guo Xiaoxian, Chen Shuming, Liu Xiaojun. Testing of Influence of Start-Stop on the Reliability and Drag Torque of the Thrust Bearing[J]. Nuclear Power Engineering, 2022, 43(3): 173-178. doi: 10.13832/j.jnpe.2022.03.0173

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Testing of Influence of Start-Stop on the Reliability and Drag Torque of the Thrust Bearing

doi: 10.13832/j.jnpe.2022.03.0173

1.
China Institute of Atomic Energy, Beijing, 102413, China
2.
Hunan SUND Industrial and Technological Co., Ltd., Xiangtan, Hunan, 411102, China

Received Date: 2021-03-15
Rev Recd Date: 2021-04-07
Publish Date: 2022-06-07

Abstract

Abstract

In order to test the effect of repeated start-stop on the reliability and drag torque of the thrust bearing of the primary circuit main pump in sodium cooled fast reactor (SFR), a reliability statistical scheme was designed by using the dispersion coefficient method suitable for small samples, three sets of Babbitt thrust pads and one upper combination bearing prototype were manufactured, a test bench was designed and built, the change of starting drag torque with shutdown loading time was tested, repeated start-stop tests were carried out by simulating the real situation of the thrust bearing. The results show that the starting drag torque increases with the increase of shutdown loading time. The repeated start-stop has little effect on the wear life of the thrust pads, and the reliability of the thrust bearing start-stop for 125 times without failure exceeds 0.99996 when the confidence level is 0.9. The repeated start-stop has effect on the drag torque of the thrust bearing, and the drag torque of the thrust bearing shows a slow upward trend with the increase of starting times. It is proved that the effect of the start-stop times must be factored in the design of starting capacity of main pump motor. This study can provide a reference for the design of starting capacity of main pump motor.
- Sodium cooled fast reactor,
- Main pump,
- Thrust bearing,
- Reliability,
- Drag torque

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References(17)

References

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