Influence of surface sand blasting treatment on vacuum surface flashover characteristics of PMMA insulator

Guo Yuewen; Liu Wenyuan; Huo Yankun; Ke Changfeng; Tang Yunsheng; Duan Li; Chen Changhua

doi:10.11884/HPLPB202032.190464

Volume 32 Issue 6

May 2020

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Article Navigation > High Power Laser and Particle Beams > 2020 > 32(6): 065002

Guo Yuewen, Liu Wenyuan, Huo Yankun, et al. Influence of surface sand blasting treatment on vacuum surface flashover characteristics of PMMA insulator[J]. High Power Laser and Particle Beams, 2020, 32: 065002. doi: 10.11884/HPLPB202032.190464

Citation:

Guo Yuewen, Liu Wenyuan, Huo Yankun, et al. Influence of surface sand blasting treatment on vacuum surface flashover characteristics of PMMA insulator[J]. High Power Laser and Particle Beams, 2020, 32: 065002. doi: 10.11884/HPLPB202032.190464

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Influence of surface sand blasting treatment on vacuum surface flashover characteristics of PMMA insulator

doi: 10.11884/HPLPB202032.190464

1.
Xiangtan University, Xiangtan 411105, China
2.
Northwest Institute of Nuclear Technology, Xi’an 710024, China

Received Date: 2019-12-16
Rev Recd Date: 2020-03-25
Publish Date: 2020-05-12

Abstract

Abstract

Surface roughening treatment on insulators is an important way to improve their vacuum surface flashover characteristics. However, flashover voltages of the insulators with the same roughness show big deviation because of the poor uniformity of the surface rough structure and bad repeatability of the surface roughening method. To improve the uniformity of the surface roughening and the stability of the voltage-withstanding of the vacuum insulators, sand blasting roughening treatment on the surface of the cylindrical PMMA insulators was studied. First of all, the cylindrical insulators were sprayed on the rotating platform. With the collisions of the spherical micro SiO₂ particles carried by the high-speed airflow, rough structure was fabricated on the surface. After the corrosion of the HF acid, residual SiO₂ particles were removed, leaving homogeneous rough structure on the surface. The changes of the surface morphology were studied by Scanning Electron Microscope and the surface roughness of the treated insulators was tested on the surface roughness meter. Surface flashover characteristics of the sand-sprayed PMMA specimens were tested on the short-pulsed high-voltage platform. The test results indicated that homogeneously rough surface was prepared by the sand blasting treatment and the surface flashover voltages of the treated insulators were improved steadily. Compared with the untreated PMMA specimens, flashover voltages of the sand blasted insulators were improved approximately 80%.
- surface flashover,
- PMMA,
- sand blasting treatment,
- surface roughness

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References(18)

References

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