<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This paper presents the study of deformations and Von-Misses stresses of the main shaft system during opening and closing operations of a rotary SF<sub>6</sub> load break switch (LBS). The shaft consists of three axially connected parts made of steel where components are on ground potential and of plastic material, which is on high potential. The insulating shaft carries three rotating knife-blade contacts for the three phases. Static deformation of the insulating shaft is calculated by applying a defined torque between the two ends of the shaft. The results allow deducing the dynamic deformation. Maximum values of Von-Misses stresses are located at the geared connection between the plastic and the steel shaft. The rotation of the shaft system is measured synchronously by two optical rotary encoders in the front and rear sides of the LBS. The results confirm the twisting of the shaft system and provide its elastic deformation values. Travel curves obtained on both side of the LBS show different courses with respect to overtravel and rebound. Discrepancies can be explained by the deformation of the main shaft due to the acting forces, whereas manufacturing tolerances resulting in loose have a certain contribution.</p>
</abstract>

This paper presents the study of deformations and Von-Misses stresses of the main shaft system during opening and closing operations of a rotary SF6 load break switch (LBS). The shaft consists of three axially connected parts made of steel where components are on ground potential and of plastic material, which is on high potential. The insulating shaft carries three rotating knife-blade contacts for the three phases. Static deformation of the insulating shaft is calculated by applying a defined torque between the two ends of the shaft. The results allow deducing the dynamic deformation. Maximum values of Von-Misses stresses are located at the geared connection between the plastic and the steel shaft. The rotation of the shaft system is measured synchronously by two optical rotary encoders in the front and rear sides of the LBS. The results confirm the twisting of the shaft system and provide its elastic deformation values. Travel curves obtained on both side of the LBS show different courses with respect to overtravel and rebound. Discrepancies can be explained by the deformation of the main shaft due to the acting forces, whereas manufacturing tolerances resulting in loose have a certain contribution.

Analysis of Deformations and Von-Misses Stresses of the Main Shaft System in a Load Break Switch

B&H Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

This paper presents the study of deformations and Von-Misses stresses of the main shaft system during opening and closing operations of a rotary SF6 load break...

Analysis of Deformations and Von-Misses Stresses of the Main Shaft System in a Load Break Switch

Publié en ligne: 17 oct. 2022

Pages: 75 - 81

Reçu: 01 juin 2021

Accepté: 01 sept. 2021

DOI: https://doi.org/10.2478/bhee-2021-0009

Mots clés
load break switch, operating mechanism, travel measurements, Multi-body dynamic analysis, Von-Misses stresses, deformations, shock absorber

© 2022 Džanko Hajradinović et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Analysis of Deformations and Von-Misses Stresses of the Main Shaft System in a Load Break Switch

Publié en ligne: 17 oct. 2022

Pages: 75 - 81

Reçu: 01 juin 2021

Accepté: 01 sept. 2021

DOI: https://doi.org/10.2478/bhee-2021-0009

Mots clésload break switch, operating mechanism, travel measurements, Multi-body dynamic analysis, Von-Misses stresses, deformations, shock absorber

© 2022 Džanko Hajradinović et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
load break switch, operating mechanism, travel measurements, Multi-body dynamic analysis, Von-Misses stresses, deformations, shock absorber